11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/drivers/acorn/scsi/acornscsi.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Acorn SCSI 3 driver 51da177e4SLinus Torvalds * By R.M.King. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License version 2 as 91da177e4SLinus Torvalds * published by the Free Software Foundation. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * Abandoned using the Select and Transfer command since there were 121da177e4SLinus Torvalds * some nasty races between our software and the target devices that 131da177e4SLinus Torvalds * were not easy to solve, and the device errata had a lot of entries 141da177e4SLinus Torvalds * for this command, some of them quite nasty... 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * Changelog: 171da177e4SLinus Torvalds * 26-Sep-1997 RMK Re-jigged to use the queue module. 181da177e4SLinus Torvalds * Re-coded state machine to be based on driver 191da177e4SLinus Torvalds * state not scsi state. Should be easier to debug. 201da177e4SLinus Torvalds * Added acornscsi_release to clean up properly. 211da177e4SLinus Torvalds * Updated proc/scsi reporting. 221da177e4SLinus Torvalds * 05-Oct-1997 RMK Implemented writing to SCSI devices. 231da177e4SLinus Torvalds * 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/ 241da177e4SLinus Torvalds * reconnect race condition causing a warning message. 251da177e4SLinus Torvalds * 12-Oct-1997 RMK Added catch for re-entering interrupt routine. 261da177e4SLinus Torvalds * 15-Oct-1997 RMK Improved handling of commands. 271da177e4SLinus Torvalds * 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h. 281da177e4SLinus Torvalds * 13-Dec-1998 RMK Better abort code and command handling. Extra state 291da177e4SLinus Torvalds * transitions added to allow dodgy devices to work. 301da177e4SLinus Torvalds */ 311da177e4SLinus Torvalds #define DEBUG_NO_WRITE 1 321da177e4SLinus Torvalds #define DEBUG_QUEUES 2 331da177e4SLinus Torvalds #define DEBUG_DMA 4 341da177e4SLinus Torvalds #define DEBUG_ABORT 8 351da177e4SLinus Torvalds #define DEBUG_DISCON 16 361da177e4SLinus Torvalds #define DEBUG_CONNECT 32 371da177e4SLinus Torvalds #define DEBUG_PHASES 64 381da177e4SLinus Torvalds #define DEBUG_WRITE 128 391da177e4SLinus Torvalds #define DEBUG_LINK 256 401da177e4SLinus Torvalds #define DEBUG_MESSAGES 512 411da177e4SLinus Torvalds #define DEBUG_RESET 1024 421da177e4SLinus Torvalds #define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\ 431da177e4SLinus Torvalds DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\ 441da177e4SLinus Torvalds DEBUG_DMA|DEBUG_QUEUES) 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds /* DRIVER CONFIGURATION 471da177e4SLinus Torvalds * 481da177e4SLinus Torvalds * SCSI-II Tagged queue support. 491da177e4SLinus Torvalds * 501da177e4SLinus Torvalds * I don't have any SCSI devices that support it, so it is totally untested 511da177e4SLinus Torvalds * (except to make sure that it doesn't interfere with any non-tagging 521da177e4SLinus Torvalds * devices). It is not fully implemented either - what happens when a 531da177e4SLinus Torvalds * tagging device reconnects??? 541da177e4SLinus Torvalds * 551da177e4SLinus Torvalds * You can tell if you have a device that supports tagged queueing my 561da177e4SLinus Torvalds * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported 571da177e4SLinus Torvalds * as '2 TAG'. 581da177e4SLinus Torvalds * 591da177e4SLinus Torvalds * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config 601da177e4SLinus Torvalds * scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug, 611da177e4SLinus Torvalds * comment out the undef. 621da177e4SLinus Torvalds */ 631da177e4SLinus Torvalds #undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 641da177e4SLinus Torvalds /* 651da177e4SLinus Torvalds * SCSI-II Linked command support. 661da177e4SLinus Torvalds * 671da177e4SLinus Torvalds * The higher level code doesn't support linked commands yet, and so the option 681da177e4SLinus Torvalds * is undef'd here. 691da177e4SLinus Torvalds */ 701da177e4SLinus Torvalds #undef CONFIG_SCSI_ACORNSCSI_LINK 711da177e4SLinus Torvalds /* 721da177e4SLinus Torvalds * SCSI-II Synchronous transfer support. 731da177e4SLinus Torvalds * 741da177e4SLinus Torvalds * Tried and tested... 751da177e4SLinus Torvalds * 761da177e4SLinus Torvalds * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) 771da177e4SLinus Torvalds * SDTR_PERIOD - period of REQ signal (min=125, max=1020) 781da177e4SLinus Torvalds * DEFAULT_PERIOD - default REQ period. 791da177e4SLinus Torvalds */ 801da177e4SLinus Torvalds #define SDTR_SIZE 12 811da177e4SLinus Torvalds #define SDTR_PERIOD 125 821da177e4SLinus Torvalds #define DEFAULT_PERIOD 500 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds /* 851da177e4SLinus Torvalds * Debugging information 861da177e4SLinus Torvalds * 871da177e4SLinus Torvalds * DEBUG - bit mask from list above 881da177e4SLinus Torvalds * DEBUG_TARGET - is defined to the target number if you want to debug 891da177e4SLinus Torvalds * a specific target. [only recon/write/dma]. 901da177e4SLinus Torvalds */ 911da177e4SLinus Torvalds #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) 921da177e4SLinus Torvalds /* only allow writing to SCSI device 0 */ 931da177e4SLinus Torvalds #define NO_WRITE 0xFE 941da177e4SLinus Torvalds /*#define DEBUG_TARGET 2*/ 951da177e4SLinus Torvalds /* 961da177e4SLinus Torvalds * Select timeout time (in 10ms units) 971da177e4SLinus Torvalds * 981da177e4SLinus Torvalds * This is the timeout used between the start of selection and the WD33C93 991da177e4SLinus Torvalds * chip deciding that the device isn't responding. 1001da177e4SLinus Torvalds */ 1011da177e4SLinus Torvalds #define TIMEOUT_TIME 10 1021da177e4SLinus Torvalds /* 10325985edcSLucas De Marchi * Define this if you want to have verbose explanation of SCSI 1041da177e4SLinus Torvalds * status/messages. 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds #undef CONFIG_ACORNSCSI_CONSTANTS 1071da177e4SLinus Torvalds /* 1081da177e4SLinus Torvalds * Define this if you want to use the on board DMAC [don't remove this option] 1091da177e4SLinus Torvalds * If not set, then use PIO mode (not currently supported). 1101da177e4SLinus Torvalds */ 1111da177e4SLinus Torvalds #define USE_DMAC 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds /* 1141da177e4SLinus Torvalds * ==================================================================================== 1151da177e4SLinus Torvalds */ 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds #ifdef DEBUG_TARGET 1181da177e4SLinus Torvalds #define DBG(cmd,xxx...) \ 1191da177e4SLinus Torvalds if (cmd->device->id == DEBUG_TARGET) { \ 1201da177e4SLinus Torvalds xxx; \ 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds #else 1231da177e4SLinus Torvalds #define DBG(cmd,xxx...) xxx 1241da177e4SLinus Torvalds #endif 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds #include <linux/module.h> 1271da177e4SLinus Torvalds #include <linux/kernel.h> 1281da177e4SLinus Torvalds #include <linux/string.h> 1291da177e4SLinus Torvalds #include <linux/signal.h> 1301da177e4SLinus Torvalds #include <linux/errno.h> 1311da177e4SLinus Torvalds #include <linux/proc_fs.h> 1321da177e4SLinus Torvalds #include <linux/ioport.h> 1331da177e4SLinus Torvalds #include <linux/blkdev.h> 1341da177e4SLinus Torvalds #include <linux/delay.h> 1351da177e4SLinus Torvalds #include <linux/interrupt.h> 1361da177e4SLinus Torvalds #include <linux/init.h> 1371da177e4SLinus Torvalds #include <linux/bitops.h> 138a796ef70SRussell King #include <linux/stringify.h> 139e95a1b65SRussell King #include <linux/io.h> 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds #include <asm/ecard.h> 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds #include "../scsi.h" 144db9dff36S #include <scsi/scsi_dbg.h> 1451da177e4SLinus Torvalds #include <scsi/scsi_host.h> 1461abfd370SMatthew Wilcox #include <scsi/scsi_transport_spi.h> 1471da177e4SLinus Torvalds #include "acornscsi.h" 1481da177e4SLinus Torvalds #include "msgqueue.h" 1491da177e4SLinus Torvalds #include "scsi.h" 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds #include <scsi/scsicam.h> 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds #define VER_MAJOR 2 1541da177e4SLinus Torvalds #define VER_MINOR 0 1551da177e4SLinus Torvalds #define VER_PATCH 6 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds #ifndef ABORT_TAG 1581da177e4SLinus Torvalds #define ABORT_TAG 0xd 1591da177e4SLinus Torvalds #else 1601da177e4SLinus Torvalds #error "Yippee! ABORT TAG is now defined! Remove this error!" 1611da177e4SLinus Torvalds #endif 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_LINK 1641da177e4SLinus Torvalds #error SCSI2 LINKed commands not supported (yet)! 1651da177e4SLinus Torvalds #endif 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds #ifdef USE_DMAC 1681da177e4SLinus Torvalds /* 1691da177e4SLinus Torvalds * DMAC setup parameters 1701da177e4SLinus Torvalds */ 1711da177e4SLinus Torvalds #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) 1721da177e4SLinus Torvalds #define INIT_DEVCON1 (DEVCON1_BHLD) 1731da177e4SLinus Torvalds #define DMAC_READ (MODECON_READ) 1741da177e4SLinus Torvalds #define DMAC_WRITE (MODECON_WRITE) 1751da177e4SLinus Torvalds #define INIT_SBICDMA (CTRL_DMABURST) 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds #define scsi_xferred have_data_in 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds /* 1801da177e4SLinus Torvalds * Size of on-board DMA buffer 1811da177e4SLinus Torvalds */ 1821da177e4SLinus Torvalds #define DMAC_BUFFER_SIZE 65536 1831da177e4SLinus Torvalds #endif 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds #define STATUS_BUFFER_TO_PRINT 24 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds unsigned int sdtr_period = SDTR_PERIOD; 1881da177e4SLinus Torvalds unsigned int sdtr_size = SDTR_SIZE; 1891da177e4SLinus Torvalds 190ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 191ee0ca6baSHenne unsigned int result); 1921da177e4SLinus Torvalds static int acornscsi_reconnect_finish(AS_Host *host); 1931da177e4SLinus Torvalds static void acornscsi_dma_cleanup(AS_Host *host); 1941da177e4SLinus Torvalds static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds /* ==================================================================================== 1971da177e4SLinus Torvalds * Miscellaneous 1981da177e4SLinus Torvalds */ 1991da177e4SLinus Torvalds 200e95a1b65SRussell King /* Offsets from MEMC base */ 201e95a1b65SRussell King #define SBIC_REGIDX 0x2000 202e95a1b65SRussell King #define SBIC_REGVAL 0x2004 203e95a1b65SRussell King #define DMAC_OFFSET 0x3000 204e95a1b65SRussell King 205e95a1b65SRussell King /* Offsets from FAST IOC base */ 206e95a1b65SRussell King #define INT_REG 0x2000 207e95a1b65SRussell King #define PAGE_REG 0x3000 208e95a1b65SRussell King 209ffd7858dSRussell King static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value) 2101da177e4SLinus Torvalds { 211e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 212e95a1b65SRussell King writeb(value, host->base + SBIC_REGVAL); 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 215ffd7858dSRussell King static inline int sbic_arm_read(AS_Host *host, unsigned int reg) 2161da177e4SLinus Torvalds { 2171da177e4SLinus Torvalds if(reg == SBIC_ASR) 218e95a1b65SRussell King return readl(host->base + SBIC_REGIDX) & 255; 219e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 220e95a1b65SRussell King return readl(host->base + SBIC_REGVAL) & 255; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 223e95a1b65SRussell King #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL) 224e95a1b65SRussell King #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL) 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds #ifdef USE_DMAC 227ffd7858dSRussell King #define dmac_read(host,reg) \ 228e95a1b65SRussell King readb((host)->base + DMAC_OFFSET + ((reg) << 2)) 2291da177e4SLinus Torvalds 230ffd7858dSRussell King #define dmac_write(host,reg,value) \ 231e95a1b65SRussell King ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); }) 2321da177e4SLinus Torvalds 233e95a1b65SRussell King #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG) 2341da177e4SLinus Torvalds 235ffd7858dSRussell King static inline unsigned int dmac_address(AS_Host *host) 2361da177e4SLinus Torvalds { 237ffd7858dSRussell King return dmac_read(host, DMAC_TXADRHI) << 16 | 238ffd7858dSRussell King dmac_read(host, DMAC_TXADRMD) << 8 | 239ffd7858dSRussell King dmac_read(host, DMAC_TXADRLO); 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds static 2431da177e4SLinus Torvalds void acornscsi_dumpdma(AS_Host *host, char *where) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds unsigned int mode, addr, len; 2461da177e4SLinus Torvalds 247ffd7858dSRussell King mode = dmac_read(host, DMAC_MODECON); 248ffd7858dSRussell King addr = dmac_address(host); 249ffd7858dSRussell King len = dmac_read(host, DMAC_TXCNTHI) << 8 | 250ffd7858dSRussell King dmac_read(host, DMAC_TXCNTLO); 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", 2531da177e4SLinus Torvalds host->host->host_no, where, 2541da177e4SLinus Torvalds mode, addr, (len + 1) & 0xffff, 255ffd7858dSRussell King dmac_read(host, DMAC_MASKREG)); 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds printk("DMA @%06x, ", host->dma.start_addr); 2581da177e4SLinus Torvalds printk("BH @%p +%04x, ", host->scsi.SCp.ptr, 2591da177e4SLinus Torvalds host->scsi.SCp.this_residual); 2601da177e4SLinus Torvalds printk("DT @+%04x ST @+%04x", host->dma.transferred, 2611da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred); 2621da177e4SLinus Torvalds printk("\n"); 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds #endif 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds static 2671da177e4SLinus Torvalds unsigned long acornscsi_sbic_xfcount(AS_Host *host) 2681da177e4SLinus Torvalds { 2691da177e4SLinus Torvalds unsigned long length; 2701da177e4SLinus Torvalds 271ffd7858dSRussell King length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16; 272ffd7858dSRussell King length |= sbic_arm_readnext(host) << 8; 273ffd7858dSRussell King length |= sbic_arm_readnext(host); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds return length; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds static int 2791da177e4SLinus Torvalds acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) 2801da177e4SLinus Torvalds { 2811da177e4SLinus Torvalds int asr; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds do { 284ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds if ((asr & stat_mask) == stat) 2871da177e4SLinus Torvalds return 0; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds udelay(1); 2901da177e4SLinus Torvalds } while (--timeout); 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds printk("scsi%d: timeout while %s\n", host->host->host_no, msg); 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds return -1; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds static 2981da177e4SLinus Torvalds int acornscsi_sbic_issuecmd(AS_Host *host, int command) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) 3011da177e4SLinus Torvalds return -1; 3021da177e4SLinus Torvalds 303ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, command); 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds return 0; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds static void 3091da177e4SLinus Torvalds acornscsi_csdelay(unsigned int cs) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds unsigned long target_jiffies, flags; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds target_jiffies = jiffies + 1 + cs * HZ / 100; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds local_save_flags(flags); 3161da177e4SLinus Torvalds local_irq_enable(); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds while (time_before(jiffies, target_jiffies)) barrier(); 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds local_irq_restore(flags); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds static 3241da177e4SLinus Torvalds void acornscsi_resetcard(AS_Host *host) 3251da177e4SLinus Torvalds { 3261da177e4SLinus Torvalds unsigned int i, timeout; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds /* assert reset line */ 3291da177e4SLinus Torvalds host->card.page_reg = 0x80; 330e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* wait 3 cs. SCSI standard says 25ms. */ 3331da177e4SLinus Torvalds acornscsi_csdelay(3); 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds host->card.page_reg = 0; 336e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds /* 3391da177e4SLinus Torvalds * Should get a reset from the card 3401da177e4SLinus Torvalds */ 3411da177e4SLinus Torvalds timeout = 1000; 3421da177e4SLinus Torvalds do { 343e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3441da177e4SLinus Torvalds break; 3451da177e4SLinus Torvalds udelay(1); 3461da177e4SLinus Torvalds } while (--timeout); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (timeout == 0) 3491da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3501da177e4SLinus Torvalds host->host->host_no); 3511da177e4SLinus Torvalds 352ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 353ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 356ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 357ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds /* 3601da177e4SLinus Torvalds * Command should cause a reset interrupt 3611da177e4SLinus Torvalds */ 3621da177e4SLinus Torvalds timeout = 1000; 3631da177e4SLinus Torvalds do { 364e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3651da177e4SLinus Torvalds break; 3661da177e4SLinus Torvalds udelay(1); 3671da177e4SLinus Torvalds } while (--timeout); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds if (timeout == 0) 3701da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3711da177e4SLinus Torvalds host->host->host_no); 3721da177e4SLinus Torvalds 373ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 374ffd7858dSRussell King if (sbic_arm_read(host, SBIC_SSR) != 0x01) 3751da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", 3761da177e4SLinus Torvalds host->host->host_no); 3771da177e4SLinus Torvalds 378ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 379ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 380ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 381ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds host->card.page_reg = 0x40; 384e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds /* setup dmac - uPC71071 */ 387ffd7858dSRussell King dmac_write(host, DMAC_INIT, 0); 3881da177e4SLinus Torvalds #ifdef USE_DMAC 389ffd7858dSRussell King dmac_write(host, DMAC_INIT, INIT_8BIT); 390ffd7858dSRussell King dmac_write(host, DMAC_CHANNEL, CHANNEL_0); 391ffd7858dSRussell King dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0); 392ffd7858dSRussell King dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1); 3931da177e4SLinus Torvalds #endif 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds host->SCpnt = NULL; 3961da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 3971da177e4SLinus Torvalds host->scsi.disconnectable = 0; 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds memset(host->busyluns, 0, sizeof(host->busyluns)); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds for (i = 0; i < 8; i++) { 4021da177e4SLinus Torvalds host->device[i].sync_state = SYNC_NEGOCIATE; 4031da177e4SLinus Torvalds host->device[i].disconnect_ok = 1; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds /* wait 25 cs. SCSI standard says 250ms. */ 4071da177e4SLinus Torvalds acornscsi_csdelay(25); 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds /*============================================================================================= 4111da177e4SLinus Torvalds * Utility routines (eg. debug) 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4141da177e4SLinus Torvalds static char *acornscsi_interrupttype[] = { 4151da177e4SLinus Torvalds "rst", "suc", "p/a", "3", 4161da177e4SLinus Torvalds "term", "5", "6", "7", 4171da177e4SLinus Torvalds "serv", "9", "a", "b", 4181da177e4SLinus Torvalds "c", "d", "e", "f" 4191da177e4SLinus Torvalds }; 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds static signed char acornscsi_map[] = { 4221da177e4SLinus Torvalds 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4231da177e4SLinus Torvalds -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4241da177e4SLinus Torvalds 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4251da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4261da177e4SLinus Torvalds 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, 4271da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4281da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4291da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4301da177e4SLinus Torvalds 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4311da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4321da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4331da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4341da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4351da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4361da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4371da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 4381da177e4SLinus Torvalds }; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds static char *acornscsi_interruptcode[] = { 4411da177e4SLinus Torvalds /* 0 */ 4421da177e4SLinus Torvalds "reset - normal mode", /* 00 */ 4431da177e4SLinus Torvalds "reset - advanced mode", /* 01 */ 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds /* 2 */ 4461da177e4SLinus Torvalds "sel", /* 11 */ 4471da177e4SLinus Torvalds "sel+xfer", /* 16 */ 4481da177e4SLinus Torvalds "data-out", /* 18 */ 4491da177e4SLinus Torvalds "data-in", /* 19 */ 4501da177e4SLinus Torvalds "cmd", /* 1A */ 4511da177e4SLinus Torvalds "stat", /* 1B */ 4521da177e4SLinus Torvalds "??-out", /* 1C */ 4531da177e4SLinus Torvalds "??-in", /* 1D */ 4541da177e4SLinus Torvalds "msg-out", /* 1E */ 4551da177e4SLinus Torvalds "msg-in", /* 1F */ 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* 12 */ 4581da177e4SLinus Torvalds "/ACK asserted", /* 20 */ 4591da177e4SLinus Torvalds "save-data-ptr", /* 21 */ 4601da177e4SLinus Torvalds "{re}sel", /* 22 */ 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds /* 15 */ 4631da177e4SLinus Torvalds "inv cmd", /* 40 */ 4641da177e4SLinus Torvalds "unexpected disconnect", /* 41 */ 4651da177e4SLinus Torvalds "sel timeout", /* 42 */ 4661da177e4SLinus Torvalds "P err", /* 43 */ 4671da177e4SLinus Torvalds "P err+ATN", /* 44 */ 4681da177e4SLinus Torvalds "bad status byte", /* 47 */ 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds /* 21 */ 4711da177e4SLinus Torvalds "resel, no id", /* 80 */ 4721da177e4SLinus Torvalds "resel", /* 81 */ 4731da177e4SLinus Torvalds "discon", /* 85 */ 4741da177e4SLinus Torvalds }; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds static 4771da177e4SLinus Torvalds void print_scsi_status(unsigned int ssr) 4781da177e4SLinus Torvalds { 4791da177e4SLinus Torvalds if (acornscsi_map[ssr] != -1) 4801da177e4SLinus Torvalds printk("%s:%s", 4811da177e4SLinus Torvalds acornscsi_interrupttype[(ssr >> 4)], 4821da177e4SLinus Torvalds acornscsi_interruptcode[acornscsi_map[ssr]]); 4831da177e4SLinus Torvalds else 4841da177e4SLinus Torvalds printk("%X:%X", ssr >> 4, ssr & 0x0f); 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds #endif 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static 4891da177e4SLinus Torvalds void print_sbic_status(int asr, int ssr, int cmdphase) 4901da177e4SLinus Torvalds { 4911da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4921da177e4SLinus Torvalds printk("sbic: %c%c%c%c%c%c ", 4931da177e4SLinus Torvalds asr & ASR_INT ? 'I' : 'i', 4941da177e4SLinus Torvalds asr & ASR_LCI ? 'L' : 'l', 4951da177e4SLinus Torvalds asr & ASR_BSY ? 'B' : 'b', 4961da177e4SLinus Torvalds asr & ASR_CIP ? 'C' : 'c', 4971da177e4SLinus Torvalds asr & ASR_PE ? 'P' : 'p', 4981da177e4SLinus Torvalds asr & ASR_DBR ? 'D' : 'd'); 4991da177e4SLinus Torvalds printk("scsi: "); 5001da177e4SLinus Torvalds print_scsi_status(ssr); 5011da177e4SLinus Torvalds printk(" ph %02X\n", cmdphase); 5021da177e4SLinus Torvalds #else 5031da177e4SLinus Torvalds printk("sbic: %02X scsi: %X:%X ph: %02X\n", 5041da177e4SLinus Torvalds asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); 5051da177e4SLinus Torvalds #endif 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds static void 5091da177e4SLinus Torvalds acornscsi_dumplogline(AS_Host *host, int target, int line) 5101da177e4SLinus Torvalds { 5111da177e4SLinus Torvalds unsigned long prev; 5121da177e4SLinus Torvalds signed int ptr; 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; 5151da177e4SLinus Torvalds if (ptr < 0) 5161da177e4SLinus Torvalds ptr += STATUS_BUFFER_SIZE; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds printk("%c: %3s:", target == 8 ? 'H' : '0' + target, 5191da177e4SLinus Torvalds line == 0 ? "ph" : line == 1 ? "ssr" : "int"); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 5241da177e4SLinus Torvalds unsigned long time_diff; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds if (!host->status[target][ptr].when) 5271da177e4SLinus Torvalds continue; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds switch (line) { 5301da177e4SLinus Torvalds case 0: 5311da177e4SLinus Torvalds printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', 5321da177e4SLinus Torvalds host->status[target][ptr].ph); 5331da177e4SLinus Torvalds break; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds case 1: 5361da177e4SLinus Torvalds printk(" %02X", host->status[target][ptr].ssr); 5371da177e4SLinus Torvalds break; 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds case 2: 5401da177e4SLinus Torvalds time_diff = host->status[target][ptr].when - prev; 5411da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5421da177e4SLinus Torvalds if (time_diff == 0) 5431da177e4SLinus Torvalds printk("==^"); 5441da177e4SLinus Torvalds else if (time_diff >= 100) 5451da177e4SLinus Torvalds printk(" "); 5461da177e4SLinus Torvalds else 5471da177e4SLinus Torvalds printk(" %02ld", time_diff); 5481da177e4SLinus Torvalds break; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds printk("\n"); 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds static 5561da177e4SLinus Torvalds void acornscsi_dumplog(AS_Host *host, int target) 5571da177e4SLinus Torvalds { 5581da177e4SLinus Torvalds do { 5591da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 0); 5601da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 1); 5611da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 2); 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds if (target == 8) 5641da177e4SLinus Torvalds break; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds target = 8; 5671da177e4SLinus Torvalds } while (1); 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds static 5711da177e4SLinus Torvalds char acornscsi_target(AS_Host *host) 5721da177e4SLinus Torvalds { 5731da177e4SLinus Torvalds if (host->SCpnt) 5741da177e4SLinus Torvalds return '0' + host->SCpnt->device->id; 5751da177e4SLinus Torvalds return 'H'; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds /* 5791da177e4SLinus Torvalds * Prototype: cmdtype_t acornscsi_cmdtype(int command) 5801da177e4SLinus Torvalds * Purpose : differentiate READ from WRITE from other commands 5811da177e4SLinus Torvalds * Params : command - command to interpret 5821da177e4SLinus Torvalds * Returns : CMD_READ - command reads data, 5831da177e4SLinus Torvalds * CMD_WRITE - command writes data, 5841da177e4SLinus Torvalds * CMD_MISC - everything else 5851da177e4SLinus Torvalds */ 5861da177e4SLinus Torvalds static inline 5871da177e4SLinus Torvalds cmdtype_t acornscsi_cmdtype(int command) 5881da177e4SLinus Torvalds { 5891da177e4SLinus Torvalds switch (command) { 5901da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_12: 5911da177e4SLinus Torvalds return CMD_WRITE; 5921da177e4SLinus Torvalds case READ_6: case READ_10: case READ_12: 5931da177e4SLinus Torvalds return CMD_READ; 5941da177e4SLinus Torvalds default: 5951da177e4SLinus Torvalds return CMD_MISC; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds /* 6001da177e4SLinus Torvalds * Prototype: int acornscsi_datadirection(int command) 6011da177e4SLinus Torvalds * Purpose : differentiate between commands that have a DATA IN phase 6021da177e4SLinus Torvalds * and a DATA OUT phase 6031da177e4SLinus Torvalds * Params : command - command to interpret 6041da177e4SLinus Torvalds * Returns : DATADIR_OUT - data out phase expected 6051da177e4SLinus Torvalds * DATADIR_IN - data in phase expected 6061da177e4SLinus Torvalds */ 6071da177e4SLinus Torvalds static 6081da177e4SLinus Torvalds datadir_t acornscsi_datadirection(int command) 6091da177e4SLinus Torvalds { 6101da177e4SLinus Torvalds switch (command) { 6111da177e4SLinus Torvalds case CHANGE_DEFINITION: case COMPARE: case COPY: 6121da177e4SLinus Torvalds case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: 6131da177e4SLinus Torvalds case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: 6141da177e4SLinus Torvalds case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: 6151da177e4SLinus Torvalds case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: 6161da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_VERIFY: 6171da177e4SLinus Torvalds case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: 6181da177e4SLinus Torvalds case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: 6191da177e4SLinus Torvalds case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: 6201da177e4SLinus Torvalds case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: 6211da177e4SLinus Torvalds return DATADIR_OUT; 6221da177e4SLinus Torvalds default: 6231da177e4SLinus Torvalds return DATADIR_IN; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* 6281da177e4SLinus Torvalds * Purpose : provide values for synchronous transfers with 33C93. 6291da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6301da177e4SLinus Torvalds * Modified by Russell King for 8MHz WD33C93A 6311da177e4SLinus Torvalds */ 6321da177e4SLinus Torvalds static struct sync_xfer_tbl { 6331da177e4SLinus Torvalds unsigned int period_ns; 6341da177e4SLinus Torvalds unsigned char reg_value; 6351da177e4SLinus Torvalds } sync_xfer_table[] = { 6361da177e4SLinus Torvalds { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, 6371da177e4SLinus Torvalds { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, 6381da177e4SLinus Torvalds { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } 6391da177e4SLinus Torvalds }; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds /* 6421da177e4SLinus Torvalds * Prototype: int acornscsi_getperiod(unsigned char syncxfer) 6431da177e4SLinus Torvalds * Purpose : period for the synchronous transfer setting 6441da177e4SLinus Torvalds * Params : syncxfer SYNCXFER register value 6451da177e4SLinus Torvalds * Returns : period in ns. 6461da177e4SLinus Torvalds */ 6471da177e4SLinus Torvalds static 6481da177e4SLinus Torvalds int acornscsi_getperiod(unsigned char syncxfer) 6491da177e4SLinus Torvalds { 6501da177e4SLinus Torvalds int i; 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds syncxfer &= 0xf0; 6531da177e4SLinus Torvalds if (syncxfer == 0x10) 6541da177e4SLinus Torvalds syncxfer = 0; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) 6571da177e4SLinus Torvalds if (syncxfer == sync_xfer_table[i].reg_value) 6581da177e4SLinus Torvalds return sync_xfer_table[i].period_ns; 6591da177e4SLinus Torvalds return 0; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds /* 6631da177e4SLinus Torvalds * Prototype: int round_period(unsigned int period) 6641da177e4SLinus Torvalds * Purpose : return index into above table for a required REQ period 6651da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6661da177e4SLinus Torvalds * Returns : table index 6671da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6681da177e4SLinus Torvalds */ 6691da177e4SLinus Torvalds static inline 6701da177e4SLinus Torvalds int round_period(unsigned int period) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds int i; 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) { 6751da177e4SLinus Torvalds if ((period <= sync_xfer_table[i].period_ns) && 6761da177e4SLinus Torvalds (period > sync_xfer_table[i - 1].period_ns)) 6771da177e4SLinus Torvalds return i; 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds return 7; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /* 6831da177e4SLinus Torvalds * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 6841da177e4SLinus Torvalds * Purpose : calculate value for 33c93s SYNC register 6851da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6861da177e4SLinus Torvalds * offset - offset in bytes between REQ/ACK 6871da177e4SLinus Torvalds * Returns : value for SYNC register 6881da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6891da177e4SLinus Torvalds */ 6901da177e4SLinus Torvalds static 6911da177e4SLinus Torvalds unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 6921da177e4SLinus Torvalds { 6931da177e4SLinus Torvalds return sync_xfer_table[round_period(period)].reg_value | 6941da177e4SLinus Torvalds ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /* ==================================================================================== 6981da177e4SLinus Torvalds * Command functions 6991da177e4SLinus Torvalds */ 7001da177e4SLinus Torvalds /* 7011da177e4SLinus Torvalds * Function: acornscsi_kick(AS_Host *host) 7021da177e4SLinus Torvalds * Purpose : kick next command to interface 7031da177e4SLinus Torvalds * Params : host - host to send command to 7041da177e4SLinus Torvalds * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING 7051da177e4SLinus Torvalds * Notes : interrupts are always disabled! 7061da177e4SLinus Torvalds */ 7071da177e4SLinus Torvalds static 7081da177e4SLinus Torvalds intr_ret_t acornscsi_kick(AS_Host *host) 7091da177e4SLinus Torvalds { 7101da177e4SLinus Torvalds int from_queue = 0; 711ee0ca6baSHenne struct scsi_cmnd *SCpnt; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds /* first check to see if a command is waiting to be executed */ 7141da177e4SLinus Torvalds SCpnt = host->origSCpnt; 7151da177e4SLinus Torvalds host->origSCpnt = NULL; 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds /* retrieve next command */ 7181da177e4SLinus Torvalds if (!SCpnt) { 7191da177e4SLinus Torvalds SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); 7201da177e4SLinus Torvalds if (!SCpnt) 7211da177e4SLinus Torvalds return INTR_IDLE; 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds from_queue = 1; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 7271da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 7281da177e4SLinus Torvalds host->scsi.disconnectable = 0; 7291da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 7301da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", 7311da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 7321da177e4SLinus Torvalds #endif 7331da177e4SLinus Torvalds host->SCpnt = NULL; 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds /* 7371da177e4SLinus Torvalds * If we have an interrupt pending, then we may have been reselected. 7381da177e4SLinus Torvalds * In this case, we don't want to write to the registers 7391da177e4SLinus Torvalds */ 740ffd7858dSRussell King if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { 741ffd7858dSRussell King sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id); 742ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN); 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds /* 7461da177e4SLinus Torvalds * claim host busy - all of these must happen atomically wrt 7471da177e4SLinus Torvalds * our interrupt routine. Failure means command loss. 7481da177e4SLinus Torvalds */ 7491da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTING; 7501da177e4SLinus Torvalds host->SCpnt = SCpnt; 7511da177e4SLinus Torvalds host->scsi.SCp = SCpnt->SCp; 7521da177e4SLinus Torvalds host->dma.xfer_setup = 0; 7531da177e4SLinus Torvalds host->dma.xfer_required = 0; 7541da177e4SLinus Torvalds host->dma.xfer_done = 0; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) 7571da177e4SLinus Torvalds DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", 7581da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id, 7591da177e4SLinus Torvalds SCpnt->cmnd[0])); 7601da177e4SLinus Torvalds #endif 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds if (from_queue) { 7631da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 7641da177e4SLinus Torvalds /* 7651da177e4SLinus Torvalds * tagged queueing - allocate a new tag to this command 7661da177e4SLinus Torvalds */ 7671da177e4SLinus Torvalds if (SCpnt->device->simple_tags) { 7681da177e4SLinus Torvalds SCpnt->device->current_tag += 1; 7691da177e4SLinus Torvalds if (SCpnt->device->current_tag == 0) 7701da177e4SLinus Torvalds SCpnt->device->current_tag = 1; 7711da177e4SLinus Torvalds SCpnt->tag = SCpnt->device->current_tag; 7721da177e4SLinus Torvalds } else 7731da177e4SLinus Torvalds #endif 7741da177e4SLinus Torvalds set_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds host->stats.removes += 1; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { 7791da177e4SLinus Torvalds case CMD_WRITE: 7801da177e4SLinus Torvalds host->stats.writes += 1; 7811da177e4SLinus Torvalds break; 7821da177e4SLinus Torvalds case CMD_READ: 7831da177e4SLinus Torvalds host->stats.reads += 1; 7841da177e4SLinus Torvalds break; 7851da177e4SLinus Torvalds case CMD_MISC: 7861da177e4SLinus Torvalds host->stats.miscs += 1; 7871da177e4SLinus Torvalds break; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds return INTR_PROCESSING; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds /* 795ee0ca6baSHenne * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result) 7961da177e4SLinus Torvalds * Purpose : complete processing for command 7971da177e4SLinus Torvalds * Params : host - interface that completed 7981da177e4SLinus Torvalds * result - driver byte of result 7991da177e4SLinus Torvalds */ 800ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 801ee0ca6baSHenne unsigned int result) 8021da177e4SLinus Torvalds { 803ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp; 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds /* clean up */ 806ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds host->stats.fins += 1; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds if (SCpnt) { 8111da177e4SLinus Torvalds *SCpntp = NULL; 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds /* 8181da177e4SLinus Torvalds * In theory, this should not happen. In practice, it seems to. 8191da177e4SLinus Torvalds * Only trigger an error if the device attempts to report all happy 8201da177e4SLinus Torvalds * but with untransferred buffers... If we don't do something, then 8211da177e4SLinus Torvalds * data loss will occur. Should we check SCpnt->underflow here? 8221da177e4SLinus Torvalds * It doesn't appear to be set to something meaningful by the higher 8231da177e4SLinus Torvalds * levels all the time. 8241da177e4SLinus Torvalds */ 8251da177e4SLinus Torvalds if (result == DID_OK) { 8261da177e4SLinus Torvalds int xfer_warn = 0; 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds if (SCpnt->underflow == 0) { 8291da177e4SLinus Torvalds if (host->scsi.SCp.ptr && 8301da177e4SLinus Torvalds acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) 8311da177e4SLinus Torvalds xfer_warn = 1; 8321da177e4SLinus Torvalds } else { 8331da177e4SLinus Torvalds if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || 8341da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred != host->dma.transferred) 8351da177e4SLinus Torvalds xfer_warn = 1; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) 8391da177e4SLinus Torvalds * Targets which break data transfers into multiple 8401da177e4SLinus Torvalds * connections shall end each successful connection 8411da177e4SLinus Torvalds * (except possibly the last) with a SAVE DATA 8421da177e4SLinus Torvalds * POINTER - DISCONNECT message sequence. 8431da177e4SLinus Torvalds * 8441da177e4SLinus Torvalds * This makes it difficult to ensure that a transfer has 8451da177e4SLinus Torvalds * completed. If we reach the end of a transfer during 8461da177e4SLinus Torvalds * the command, then we can only have finished the transfer. 8471da177e4SLinus Torvalds * therefore, if we seem to have some data remaining, this 8481da177e4SLinus Torvalds * is not a problem. 8491da177e4SLinus Torvalds */ 8501da177e4SLinus Torvalds if (host->dma.xfer_done) 8511da177e4SLinus Torvalds xfer_warn = 0; 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds if (xfer_warn) { 8541da177e4SLinus Torvalds switch (status_byte(SCpnt->result)) { 8551da177e4SLinus Torvalds case CHECK_CONDITION: 8561da177e4SLinus Torvalds case COMMAND_TERMINATED: 8571da177e4SLinus Torvalds case BUSY: 8581da177e4SLinus Torvalds case QUEUE_FULL: 8591da177e4SLinus Torvalds case RESERVATION_CONFLICT: 8601da177e4SLinus Torvalds break; 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds default: 8631da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=", 8641da177e4SLinus Torvalds host->host->host_no, SCpnt->result); 865db9dff36S __scsi_print_command(SCpnt->cmnd); 8661da177e4SLinus Torvalds acornscsi_dumpdma(host, "done"); 8671da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 8681da177e4SLinus Torvalds SCpnt->result &= 0xffff; 8691da177e4SLinus Torvalds SCpnt->result |= DID_ERROR << 16; 8701da177e4SLinus Torvalds } 8711da177e4SLinus Torvalds } 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds if (!SCpnt->scsi_done) 8751da177e4SLinus Torvalds panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 8801da177e4SLinus Torvalds } else 8811da177e4SLinus Torvalds printk("scsi%d: null command in acornscsi_done", host->host->host_no); 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds /* ==================================================================================== 8871da177e4SLinus Torvalds * DMA routines 8881da177e4SLinus Torvalds */ 8891da177e4SLinus Torvalds /* 8901da177e4SLinus Torvalds * Purpose : update SCSI Data Pointer 8911da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 8921da177e4SLinus Torvalds */ 8931da177e4SLinus Torvalds static 8940a04137eSChristoph Hellwig void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length) 8951da177e4SLinus Torvalds { 8961da177e4SLinus Torvalds SCp->ptr += length; 8971da177e4SLinus Torvalds SCp->this_residual -= length; 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds if (SCp->this_residual == 0 && next_SCp(SCp) == 0) 9001da177e4SLinus Torvalds host->dma.xfer_done = 1; 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds /* 9041da177e4SLinus Torvalds * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, 9051da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 9061da177e4SLinus Torvalds * Purpose : read data from DMA RAM 9071da177e4SLinus Torvalds * Params : host - host to transfer from 9081da177e4SLinus Torvalds * ptr - DRAM address 9091da177e4SLinus Torvalds * start_addr - host mem address 9101da177e4SLinus Torvalds * length - number of bytes to transfer 9111da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9121da177e4SLinus Torvalds */ 9131da177e4SLinus Torvalds static 9141da177e4SLinus Torvalds void acornscsi_data_read(AS_Host *host, char *ptr, 9151da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9161da177e4SLinus Torvalds { 917e95a1b65SRussell King extern void __acornscsi_in(void __iomem *, char *buf, int len); 9181da177e4SLinus Torvalds unsigned int page, offset, len = length; 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds page = (start_addr >> 12); 9211da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9221da177e4SLinus Torvalds 923e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds while (len > 0) { 9261da177e4SLinus Torvalds unsigned int this_len; 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9291da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9301da177e4SLinus Torvalds else 9311da177e4SLinus Torvalds this_len = len; 9321da177e4SLinus Torvalds 933e95a1b65SRussell King __acornscsi_in(host->base + (offset << 1), ptr, this_len); 9341da177e4SLinus Torvalds 9351da177e4SLinus Torvalds offset += this_len; 9361da177e4SLinus Torvalds ptr += this_len; 9371da177e4SLinus Torvalds len -= this_len; 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds if (offset == (1 << 12)) { 9401da177e4SLinus Torvalds offset = 0; 9411da177e4SLinus Torvalds page ++; 942e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9431da177e4SLinus Torvalds } 9441da177e4SLinus Torvalds } 945e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds /* 9491da177e4SLinus Torvalds * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, 9501da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 9511da177e4SLinus Torvalds * Purpose : write data to DMA RAM 9521da177e4SLinus Torvalds * Params : host - host to transfer from 9531da177e4SLinus Torvalds * ptr - DRAM address 9541da177e4SLinus Torvalds * start_addr - host mem address 9551da177e4SLinus Torvalds * length - number of bytes to transfer 9561da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9571da177e4SLinus Torvalds */ 9581da177e4SLinus Torvalds static 9591da177e4SLinus Torvalds void acornscsi_data_write(AS_Host *host, char *ptr, 9601da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9611da177e4SLinus Torvalds { 962e95a1b65SRussell King extern void __acornscsi_out(void __iomem *, char *buf, int len); 9631da177e4SLinus Torvalds unsigned int page, offset, len = length; 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds page = (start_addr >> 12); 9661da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9671da177e4SLinus Torvalds 968e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds while (len > 0) { 9711da177e4SLinus Torvalds unsigned int this_len; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9741da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9751da177e4SLinus Torvalds else 9761da177e4SLinus Torvalds this_len = len; 9771da177e4SLinus Torvalds 978e95a1b65SRussell King __acornscsi_out(host->base + (offset << 1), ptr, this_len); 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds offset += this_len; 9811da177e4SLinus Torvalds ptr += this_len; 9821da177e4SLinus Torvalds len -= this_len; 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds if (offset == (1 << 12)) { 9851da177e4SLinus Torvalds offset = 0; 9861da177e4SLinus Torvalds page ++; 987e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds } 990e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds 9931da177e4SLinus Torvalds /* ========================================================================================= 9941da177e4SLinus Torvalds * On-board DMA routines 9951da177e4SLinus Torvalds */ 9961da177e4SLinus Torvalds #ifdef USE_DMAC 9971da177e4SLinus Torvalds /* 9981da177e4SLinus Torvalds * Prototype: void acornscsi_dmastop(AS_Host *host) 9991da177e4SLinus Torvalds * Purpose : stop all DMA 10001da177e4SLinus Torvalds * Params : host - host on which to stop DMA 10011da177e4SLinus Torvalds * Notes : This is called when leaving DATA IN/OUT phase, 10021da177e4SLinus Torvalds * or when interface is RESET 10031da177e4SLinus Torvalds */ 10041da177e4SLinus Torvalds static inline 10051da177e4SLinus Torvalds void acornscsi_dma_stop(AS_Host *host) 10061da177e4SLinus Torvalds { 1007ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1008ffd7858dSRussell King dmac_clearintr(host); 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10111da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); 10121da177e4SLinus Torvalds #endif 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds /* 10161da177e4SLinus Torvalds * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10171da177e4SLinus Torvalds * Purpose : setup DMA controller for data transfer 10181da177e4SLinus Torvalds * Params : host - host to setup 10191da177e4SLinus Torvalds * direction - data transfer direction 10201da177e4SLinus Torvalds * Notes : This is called when entering DATA I/O phase, not 10211da177e4SLinus Torvalds * while we're in a DATA I/O phase 10221da177e4SLinus Torvalds */ 10231da177e4SLinus Torvalds static 10241da177e4SLinus Torvalds void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10251da177e4SLinus Torvalds { 10261da177e4SLinus Torvalds unsigned int address, length, mode; 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds host->dma.direction = direction; 10291da177e4SLinus Torvalds 1030ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds if (direction == DMA_OUT) { 10331da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 10341da177e4SLinus Torvalds if (NO_WRITE & (1 << host->SCpnt->device->id)) { 10351da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", 10361da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 10371da177e4SLinus Torvalds return; 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds #endif 10401da177e4SLinus Torvalds mode = DMAC_WRITE; 10411da177e4SLinus Torvalds } else 10421da177e4SLinus Torvalds mode = DMAC_READ; 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds /* 10451da177e4SLinus Torvalds * Allocate some buffer space, limited to half the buffer size 10461da177e4SLinus Torvalds */ 10471da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 10481da177e4SLinus Torvalds if (length) { 10491da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 10501da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 10511da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds /* 10541da177e4SLinus Torvalds * Transfer data to DMA memory 10551da177e4SLinus Torvalds */ 10561da177e4SLinus Torvalds if (direction == DMA_OUT) 10571da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 10581da177e4SLinus Torvalds length); 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds length -= 1; 1061ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1062ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1063ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1064ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1065ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1066ffd7858dSRussell King dmac_write(host, DMAC_MODECON, mode); 1067ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10701da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); 10711da177e4SLinus Torvalds #endif 10721da177e4SLinus Torvalds host->dma.xfer_setup = 1; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds /* 10771da177e4SLinus Torvalds * Function: void acornscsi_dma_cleanup(AS_Host *host) 10781da177e4SLinus Torvalds * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct 10791da177e4SLinus Torvalds * Params : host - host to finish 10801da177e4SLinus Torvalds * Notes : This is called when a command is: 10811da177e4SLinus Torvalds * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT 10821da177e4SLinus Torvalds * : This must not return until all transfers are completed. 10831da177e4SLinus Torvalds */ 10841da177e4SLinus Torvalds static 10851da177e4SLinus Torvalds void acornscsi_dma_cleanup(AS_Host *host) 10861da177e4SLinus Torvalds { 1087ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1088ffd7858dSRussell King dmac_clearintr(host); 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds /* 10911da177e4SLinus Torvalds * Check for a pending transfer 10921da177e4SLinus Torvalds */ 10931da177e4SLinus Torvalds if (host->dma.xfer_required) { 10941da177e4SLinus Torvalds host->dma.xfer_required = 0; 10951da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 10961da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 10971da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds /* 11011da177e4SLinus Torvalds * Has a transfer been setup? 11021da177e4SLinus Torvalds */ 11031da177e4SLinus Torvalds if (host->dma.xfer_setup) { 11041da177e4SLinus Torvalds unsigned int transferred; 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds host->dma.xfer_setup = 0; 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11091da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); 11101da177e4SLinus Torvalds #endif 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds /* 11131da177e4SLinus Torvalds * Calculate number of bytes transferred from DMA. 11141da177e4SLinus Torvalds */ 1115ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11161da177e4SLinus Torvalds host->dma.transferred += transferred; 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 11191da177e4SLinus Torvalds acornscsi_data_read(host, host->scsi.SCp.ptr, 11201da177e4SLinus Torvalds host->dma.start_addr, transferred); 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds /* 11231da177e4SLinus Torvalds * Update SCSI pointers 11241da177e4SLinus Torvalds */ 11251da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11261da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11271da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); 11281da177e4SLinus Torvalds #endif 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds /* 11331da177e4SLinus Torvalds * Function: void acornscsi_dmacintr(AS_Host *host) 11341da177e4SLinus Torvalds * Purpose : handle interrupts from DMAC device 11351da177e4SLinus Torvalds * Params : host - host to process 11361da177e4SLinus Torvalds * Notes : If reading, we schedule the read to main memory & 11371da177e4SLinus Torvalds * allow the transfer to continue. 11381da177e4SLinus Torvalds * : If writing, we fill the onboard DMA memory from main 11391da177e4SLinus Torvalds * memory. 11401da177e4SLinus Torvalds * : Called whenever DMAC finished it's current transfer. 11411da177e4SLinus Torvalds */ 11421da177e4SLinus Torvalds static 11431da177e4SLinus Torvalds void acornscsi_dma_intr(AS_Host *host) 11441da177e4SLinus Torvalds { 11451da177e4SLinus Torvalds unsigned int address, length, transferred; 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11481da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); 11491da177e4SLinus Torvalds #endif 11501da177e4SLinus Torvalds 1151ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1152ffd7858dSRussell King dmac_clearintr(host); 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds /* 11551da177e4SLinus Torvalds * Calculate amount transferred via DMA 11561da177e4SLinus Torvalds */ 1157ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11581da177e4SLinus Torvalds host->dma.transferred += transferred; 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds /* 11611da177e4SLinus Torvalds * Schedule DMA transfer off board 11621da177e4SLinus Torvalds */ 11631da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) { 11641da177e4SLinus Torvalds host->dma.xfer_start = host->dma.start_addr; 11651da177e4SLinus Torvalds host->dma.xfer_length = transferred; 11661da177e4SLinus Torvalds host->dma.xfer_ptr = host->scsi.SCp.ptr; 11671da177e4SLinus Torvalds host->dma.xfer_required = 1; 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds /* 11731da177e4SLinus Torvalds * Allocate some buffer space, limited to half the on-board RAM size 11741da177e4SLinus Torvalds */ 11751da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 11761da177e4SLinus Torvalds if (length) { 11771da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 11781da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 11791da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds /* 11821da177e4SLinus Torvalds * Transfer data to DMA memory 11831da177e4SLinus Torvalds */ 11841da177e4SLinus Torvalds if (host->dma.direction == DMA_OUT) 11851da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 11861da177e4SLinus Torvalds length); 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds length -= 1; 1189ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1190ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1191ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1192ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1193ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1194ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11971da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); 11981da177e4SLinus Torvalds #endif 11991da177e4SLinus Torvalds } else { 12001da177e4SLinus Torvalds host->dma.xfer_setup = 0; 12011da177e4SLinus Torvalds #if 0 12021da177e4SLinus Torvalds /* 12031da177e4SLinus Torvalds * If the interface still wants more, then this is an error. 12041da177e4SLinus Torvalds * We give it another byte, but we also attempt to raise an 12051da177e4SLinus Torvalds * attention condition. We continue giving one byte until 12061da177e4SLinus Torvalds * the device recognises the attention. 12071da177e4SLinus Torvalds */ 1208ffd7858dSRussell King if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) { 12091da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 12101da177e4SLinus Torvalds 1211ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, 0); 1212ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, 0); 1213ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, 0); 1214ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, 0); 1215ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1216ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds #endif 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds /* 12231da177e4SLinus Torvalds * Function: void acornscsi_dma_xfer(AS_Host *host) 12241da177e4SLinus Torvalds * Purpose : transfer data between AcornSCSI and memory 12251da177e4SLinus Torvalds * Params : host - host to process 12261da177e4SLinus Torvalds */ 12271da177e4SLinus Torvalds static 12281da177e4SLinus Torvalds void acornscsi_dma_xfer(AS_Host *host) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds host->dma.xfer_required = 0; 12311da177e4SLinus Torvalds 12321da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 12331da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 12341da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds /* 12381da177e4SLinus Torvalds * Function: void acornscsi_dma_adjust(AS_Host *host) 12391da177e4SLinus Torvalds * Purpose : adjust DMA pointers & count for bytes transferred to 12401da177e4SLinus Torvalds * SBIC but not SCSI bus. 12411da177e4SLinus Torvalds * Params : host - host to adjust DMA count for 12421da177e4SLinus Torvalds */ 12431da177e4SLinus Torvalds static 12441da177e4SLinus Torvalds void acornscsi_dma_adjust(AS_Host *host) 12451da177e4SLinus Torvalds { 12461da177e4SLinus Torvalds if (host->dma.xfer_setup) { 12471da177e4SLinus Torvalds signed long transferred; 12481da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12491da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); 12501da177e4SLinus Torvalds #endif 12511da177e4SLinus Torvalds /* 12521da177e4SLinus Torvalds * Calculate correct DMA address - DMA is ahead of SCSI bus while 12531da177e4SLinus Torvalds * writing. 12541da177e4SLinus Torvalds * host->scsi.SCp.scsi_xferred is the number of bytes 12551da177e4SLinus Torvalds * actually transferred to/from the SCSI bus. 12561da177e4SLinus Torvalds * host->dma.transferred is the number of bytes transferred 12571da177e4SLinus Torvalds * over DMA since host->dma.start_addr was last set. 12581da177e4SLinus Torvalds * 12591da177e4SLinus Torvalds * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred 12601da177e4SLinus Torvalds * - host->dma.transferred 12611da177e4SLinus Torvalds */ 12621da177e4SLinus Torvalds transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; 12631da177e4SLinus Torvalds if (transferred < 0) 12641da177e4SLinus Torvalds printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", 12651da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), transferred); 12661da177e4SLinus Torvalds else if (transferred == 0) 12671da177e4SLinus Torvalds host->dma.xfer_setup = 0; 12681da177e4SLinus Torvalds else { 12691da177e4SLinus Torvalds transferred += host->dma.start_addr; 1270ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, transferred); 1271ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, transferred >> 8); 1272ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, transferred >> 16); 12731da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12741da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); 12751da177e4SLinus Torvalds #endif 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds } 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds #endif 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds /* ========================================================================================= 12821da177e4SLinus Torvalds * Data I/O 12831da177e4SLinus Torvalds */ 12841da177e4SLinus Torvalds static int 12851da177e4SLinus Torvalds acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) 12861da177e4SLinus Torvalds { 12871da177e4SLinus Torvalds unsigned int asr, timeout = max_timeout; 12881da177e4SLinus Torvalds int my_ptr = *ptr; 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds while (my_ptr < len) { 1291ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds if (asr & ASR_DBR) { 12941da177e4SLinus Torvalds timeout = max_timeout; 12951da177e4SLinus Torvalds 1296ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]); 12971da177e4SLinus Torvalds } else if (asr & ASR_INT) 12981da177e4SLinus Torvalds break; 12991da177e4SLinus Torvalds else if (--timeout == 0) 13001da177e4SLinus Torvalds break; 13011da177e4SLinus Torvalds udelay(1); 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds *ptr = my_ptr; 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds return (timeout == 0) ? -1 : 0; 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds /* 13101da177e4SLinus Torvalds * Function: void acornscsi_sendcommand(AS_Host *host) 13111da177e4SLinus Torvalds * Purpose : send a command to a target 13121da177e4SLinus Torvalds * Params : host - host which is connected to target 13131da177e4SLinus Torvalds */ 13141da177e4SLinus Torvalds static void 13151da177e4SLinus Torvalds acornscsi_sendcommand(AS_Host *host) 13161da177e4SLinus Torvalds { 1317ee0ca6baSHenne struct scsi_cmnd *SCpnt = host->SCpnt; 13181da177e4SLinus Torvalds 1319ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1320ffd7858dSRussell King sbic_arm_writenext(host, 0); 1321ffd7858dSRussell King sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command); 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds if (acornscsi_write_pio(host, SCpnt->cmnd, 13261da177e4SLinus Torvalds (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) 13271da177e4SLinus Torvalds printk("scsi%d: timeout while sending command\n", host->host->host_no); 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds host->scsi.phase = PHASE_COMMAND; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds static 13331da177e4SLinus Torvalds void acornscsi_sendmessage(AS_Host *host) 13341da177e4SLinus Torvalds { 13351da177e4SLinus Torvalds unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); 13361da177e4SLinus Torvalds unsigned int msgnr; 13371da177e4SLinus Torvalds struct message *msg; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13401da177e4SLinus Torvalds printk("scsi%d.%c: sending message ", 13411da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 13421da177e4SLinus Torvalds #endif 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds switch (message_length) { 13451da177e4SLinus Torvalds case 0: 13461da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); 13491da177e4SLinus Torvalds 1350ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, NOP); 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds host->scsi.last_message = NOP; 13531da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13541da177e4SLinus Torvalds printk("NOP"); 13551da177e4SLinus Torvalds #endif 13561da177e4SLinus Torvalds break; 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds case 1: 13591da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13601da177e4SLinus Torvalds msg = msgqueue_getmsg(&host->scsi.msgs, 0); 13611da177e4SLinus Torvalds 13621da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); 13631da177e4SLinus Torvalds 1364ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, msg->msg[0]); 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13671da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13681abfd370SMatthew Wilcox spi_print_msg(msg->msg); 13691da177e4SLinus Torvalds #endif 13701da177e4SLinus Torvalds break; 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds default: 13731da177e4SLinus Torvalds /* 13741da177e4SLinus Torvalds * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) 13751da177e4SLinus Torvalds * 'When a target sends this (MESSAGE_REJECT) message, it 13761da177e4SLinus Torvalds * shall change to MESSAGE IN phase and send this message 13771da177e4SLinus Torvalds * prior to requesting additional message bytes from the 13781da177e4SLinus Torvalds * initiator. This provides an interlock so that the 13791da177e4SLinus Torvalds * initiator can determine which message byte is rejected. 13801da177e4SLinus Torvalds */ 1381ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1382ffd7858dSRussell King sbic_arm_writenext(host, 0); 1383ffd7858dSRussell King sbic_arm_writenext(host, message_length); 13841da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds msgnr = 0; 13871da177e4SLinus Torvalds while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { 13881da177e4SLinus Torvalds unsigned int i; 13891da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13901abfd370SMatthew Wilcox spi_print_msg(msg); 13911da177e4SLinus Torvalds #endif 13921da177e4SLinus Torvalds i = 0; 13931da177e4SLinus Torvalds if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) 13941da177e4SLinus Torvalds printk("scsi%d: timeout while sending message\n", host->host->host_no); 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13971da177e4SLinus Torvalds if (msg->msg[0] == EXTENDED_MESSAGE) 13981da177e4SLinus Torvalds host->scsi.last_message |= msg->msg[2] << 8; 13991da177e4SLinus Torvalds 14001da177e4SLinus Torvalds if (i != msg->length) 14011da177e4SLinus Torvalds break; 14021da177e4SLinus Torvalds } 14031da177e4SLinus Torvalds break; 14041da177e4SLinus Torvalds } 14051da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 14061da177e4SLinus Torvalds printk("\n"); 14071da177e4SLinus Torvalds #endif 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds /* 14111da177e4SLinus Torvalds * Function: void acornscsi_readstatusbyte(AS_Host *host) 14121da177e4SLinus Torvalds * Purpose : Read status byte from connected target 14131da177e4SLinus Torvalds * Params : host - host connected to target 14141da177e4SLinus Torvalds */ 14151da177e4SLinus Torvalds static 14161da177e4SLinus Torvalds void acornscsi_readstatusbyte(AS_Host *host) 14171da177e4SLinus Torvalds { 14181da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); 14191da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); 1420ffd7858dSRussell King host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA); 14211da177e4SLinus Torvalds } 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds /* 14241da177e4SLinus Torvalds * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) 14251da177e4SLinus Torvalds * Purpose : Read one message byte from connected target 14261da177e4SLinus Torvalds * Params : host - host connected to target 14271da177e4SLinus Torvalds */ 14281da177e4SLinus Torvalds static 14291da177e4SLinus Torvalds unsigned char acornscsi_readmessagebyte(AS_Host *host) 14301da177e4SLinus Torvalds { 14311da177e4SLinus Torvalds unsigned char message; 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); 14361da177e4SLinus Torvalds 1437ffd7858dSRussell King message = sbic_arm_read(host, SBIC_DATA); 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds /* wait for MSGIN-XFER-PAUSED */ 14401da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); 14411da177e4SLinus Torvalds 1442ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds return message; 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds 14471da177e4SLinus Torvalds /* 14481da177e4SLinus Torvalds * Function: void acornscsi_message(AS_Host *host) 14491da177e4SLinus Torvalds * Purpose : Read complete message from connected target & action message 14501da177e4SLinus Torvalds * Params : host - host connected to target 14511da177e4SLinus Torvalds */ 14521da177e4SLinus Torvalds static 14531da177e4SLinus Torvalds void acornscsi_message(AS_Host *host) 14541da177e4SLinus Torvalds { 14551da177e4SLinus Torvalds unsigned char message[16]; 14561da177e4SLinus Torvalds unsigned int msgidx = 0, msglen = 1; 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds do { 14591da177e4SLinus Torvalds message[msgidx] = acornscsi_readmessagebyte(host); 14601da177e4SLinus Torvalds 14611da177e4SLinus Torvalds switch (msgidx) { 14621da177e4SLinus Torvalds case 0: 14631da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE || 14641da177e4SLinus Torvalds (message[0] >= 0x20 && message[0] <= 0x2f)) 14651da177e4SLinus Torvalds msglen = 2; 14661da177e4SLinus Torvalds break; 14671da177e4SLinus Torvalds 14681da177e4SLinus Torvalds case 1: 14691da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE) 14701da177e4SLinus Torvalds msglen += message[msgidx]; 14711da177e4SLinus Torvalds break; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds msgidx += 1; 14741da177e4SLinus Torvalds if (msgidx < msglen) { 14751da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 14761da177e4SLinus Torvalds 14771da177e4SLinus Torvalds /* wait for next msg-in */ 14781da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack"); 1479ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14801da177e4SLinus Torvalds } 14811da177e4SLinus Torvalds } while (msgidx < msglen); 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 14841da177e4SLinus Torvalds printk("scsi%d.%c: message in: ", 14851da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 14861abfd370SMatthew Wilcox spi_print_msg(message); 14871da177e4SLinus Torvalds printk("\n"); 14881da177e4SLinus Torvalds #endif 14891da177e4SLinus Torvalds 14901da177e4SLinus Torvalds if (host->scsi.phase == PHASE_RECONNECTED) { 14911da177e4SLinus Torvalds /* 14921da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 14931da177e4SLinus Torvalds * 'Whenever a target reconnects to an initiator to continue 14941da177e4SLinus Torvalds * a tagged I/O process, the SIMPLE QUEUE TAG message shall 14951da177e4SLinus Torvalds * be sent immediately following the IDENTIFY message...' 14961da177e4SLinus Torvalds */ 14971da177e4SLinus Torvalds if (message[0] == SIMPLE_QUEUE_TAG) 14981da177e4SLinus Torvalds host->scsi.reconnected.tag = message[1]; 14991da177e4SLinus Torvalds if (acornscsi_reconnect_finish(host)) 15001da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15011da177e4SLinus Torvalds } 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds switch (message[0]) { 15041da177e4SLinus Torvalds case ABORT: 15051da177e4SLinus Torvalds case ABORT_TAG: 15061da177e4SLinus Torvalds case COMMAND_COMPLETE: 15071da177e4SLinus Torvalds if (host->scsi.phase != PHASE_STATUSIN) { 15081da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", 15091da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15101da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt->device->id); 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds host->scsi.phase = PHASE_DONE; 15131da177e4SLinus Torvalds host->scsi.SCp.Message = message[0]; 15141da177e4SLinus Torvalds break; 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds case SAVE_POINTERS: 15171da177e4SLinus Torvalds /* 15181da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) 15191da177e4SLinus Torvalds * 'The SAVE DATA POINTER message is sent from a target to 15201da177e4SLinus Torvalds * direct the initiator to copy the active data pointer to 15211da177e4SLinus Torvalds * the saved data pointer for the current I/O process. 15221da177e4SLinus Torvalds */ 15231da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15241da177e4SLinus Torvalds host->SCpnt->SCp = host->scsi.SCp; 15251da177e4SLinus Torvalds host->SCpnt->SCp.sent_command = 0; 15261da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15271da177e4SLinus Torvalds break; 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds case RESTORE_POINTERS: 15301da177e4SLinus Torvalds /* 15311da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) 15321da177e4SLinus Torvalds * 'The RESTORE POINTERS message is sent from a target to 15331da177e4SLinus Torvalds * direct the initiator to copy the most recently saved 15341da177e4SLinus Torvalds * command, data, and status pointers for the I/O process 15351da177e4SLinus Torvalds * to the corresponding active pointers. The command and 15361da177e4SLinus Torvalds * status pointers shall be restored to the beginning of 15371da177e4SLinus Torvalds * the present command and status areas.' 15381da177e4SLinus Torvalds */ 15391da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15401da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 15411da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15421da177e4SLinus Torvalds break; 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds case DISCONNECT: 15451da177e4SLinus Torvalds /* 15461da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) 15471da177e4SLinus Torvalds * 'On those occasions when an error or exception condition occurs 15481da177e4SLinus Torvalds * and the target elects to repeat the information transfer, the 15491da177e4SLinus Torvalds * target may repeat the transfer either issuing a RESTORE POINTERS 15501da177e4SLinus Torvalds * message or by disconnecting without issuing a SAVE POINTERS 15511da177e4SLinus Torvalds * message. When reconnection is completed, the most recent 15521da177e4SLinus Torvalds * saved pointer values are restored.' 15531da177e4SLinus Torvalds */ 15541da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15551da177e4SLinus Torvalds host->scsi.phase = PHASE_DISCONNECT; 15561da177e4SLinus Torvalds break; 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds case MESSAGE_REJECT: 15591da177e4SLinus Torvalds #if 0 /* this isn't needed any more */ 15601da177e4SLinus Torvalds /* 15611da177e4SLinus Torvalds * If we were negociating sync transfer, we don't yet know if 15621da177e4SLinus Torvalds * this REJECT is for the sync transfer or for the tagged queue/wide 156325985edcSLucas De Marchi * transfer. Re-initiate sync transfer negotiation now, and if 15641da177e4SLinus Torvalds * we got a REJECT in response to SDTR, then it'll be set to DONE. 15651da177e4SLinus Torvalds */ 15661da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) 15671da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; 15681da177e4SLinus Torvalds #endif 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds /* 15711da177e4SLinus Torvalds * If we have any messages waiting to go out, then assert ATN now 15721da177e4SLinus Torvalds */ 15731da177e4SLinus Torvalds if (msgqueue_msglength(&host->scsi.msgs)) 15741da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 15751da177e4SLinus Torvalds 15761da177e4SLinus Torvalds switch (host->scsi.last_message) { 15771da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 15781da177e4SLinus Torvalds case HEAD_OF_QUEUE_TAG: 15791da177e4SLinus Torvalds case ORDERED_QUEUE_TAG: 15801da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 15811da177e4SLinus Torvalds /* 15821da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 15831da177e4SLinus Torvalds * If a target does not implement tagged queuing and a queue tag 15841da177e4SLinus Torvalds * message is received, it shall respond with a MESSAGE REJECT 15851da177e4SLinus Torvalds * message and accept the I/O process as if it were untagged. 15861da177e4SLinus Torvalds */ 15871da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", 15881da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15891da177e4SLinus Torvalds host->SCpnt->device->simple_tags = 0; 15901da177e4SLinus Torvalds set_bit(host->SCpnt->device->id * 8 + host->SCpnt->device->lun, host->busyluns); 15911da177e4SLinus Torvalds break; 15921da177e4SLinus Torvalds #endif 15931da177e4SLinus Torvalds case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): 15941da177e4SLinus Torvalds /* 15951da177e4SLinus Torvalds * Target can't handle synchronous transfers 15961da177e4SLinus Torvalds */ 15971da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", 15981da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15991da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; 16001da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; 1601ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 16021da177e4SLinus Torvalds break; 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds default: 16051da177e4SLinus Torvalds break; 16061da177e4SLinus Torvalds } 16071da177e4SLinus Torvalds break; 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds case QUEUE_FULL: 16101da177e4SLinus Torvalds /* TODO: target queue is full */ 16111da177e4SLinus Torvalds break; 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 16141da177e4SLinus Torvalds /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ 16151da177e4SLinus Torvalds printk("scsi%d.%c: reconnect queue tag %02X\n", 16161da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16171da177e4SLinus Torvalds message[1]); 16181da177e4SLinus Torvalds break; 16191da177e4SLinus Torvalds 16201da177e4SLinus Torvalds case EXTENDED_MESSAGE: 16211da177e4SLinus Torvalds switch (message[2]) { 16221da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 16231da177e4SLinus Torvalds case EXTENDED_SDTR: 16241da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { 16251da177e4SLinus Torvalds /* 16261da177e4SLinus Torvalds * We requested synchronous transfers. This isn't quite right... 16271da177e4SLinus Torvalds * We can only say if this succeeded if we proceed on to execute the 16281da177e4SLinus Torvalds * command from this message. If we get a MESSAGE PARITY ERROR, 16291da177e4SLinus Torvalds * and the target retries fail, then we fallback to asynchronous mode 16301da177e4SLinus Torvalds */ 16311da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; 16321da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", 16331da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16341da177e4SLinus Torvalds message[4], message[3] * 4); 16351da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16361da177e4SLinus Torvalds calc_sync_xfer(message[3] * 4, message[4]); 16371da177e4SLinus Torvalds } else { 16381da177e4SLinus Torvalds unsigned char period, length; 16391da177e4SLinus Torvalds /* 16401da177e4SLinus Torvalds * Target requested synchronous transfers. The agreement is only 16411da177e4SLinus Torvalds * to be in operation AFTER the target leaves message out phase. 16421da177e4SLinus Torvalds */ 16431da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16441da177e4SLinus Torvalds period = max_t(unsigned int, message[3], sdtr_period / 4); 16451da177e4SLinus Torvalds length = min_t(unsigned int, message[4], sdtr_size); 16461da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, 16471da177e4SLinus Torvalds EXTENDED_SDTR, period, length); 16481da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16491da177e4SLinus Torvalds calc_sync_xfer(period * 4, length); 16501da177e4SLinus Torvalds } 1651ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 16521da177e4SLinus Torvalds break; 16531da177e4SLinus Torvalds #else 16541da177e4SLinus Torvalds /* We do not accept synchronous transfers. Respond with a 16551da177e4SLinus Torvalds * MESSAGE_REJECT. 16561da177e4SLinus Torvalds */ 16571da177e4SLinus Torvalds #endif 16581da177e4SLinus Torvalds 16591da177e4SLinus Torvalds case EXTENDED_WDTR: 16601da177e4SLinus Torvalds /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT 16611da177e4SLinus Torvalds * to a wide data transfer request. 16621da177e4SLinus Torvalds */ 16631da177e4SLinus Torvalds default: 16641da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16651da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 16661da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 16671da177e4SLinus Torvalds break; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds break; 16701da177e4SLinus Torvalds 16711da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_LINK 16721da177e4SLinus Torvalds case LINKED_CMD_COMPLETE: 16731da177e4SLinus Torvalds case LINKED_FLG_CMD_COMPLETE: 16741da177e4SLinus Torvalds /* 16751da177e4SLinus Torvalds * We don't support linked commands yet 16761da177e4SLinus Torvalds */ 16771da177e4SLinus Torvalds if (0) { 16781da177e4SLinus Torvalds #if (DEBUG & DEBUG_LINK) 16791da177e4SLinus Torvalds printk("scsi%d.%c: lun %d tag %d linked command complete\n", 16801da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), host->SCpnt->tag); 16811da177e4SLinus Torvalds #endif 16821da177e4SLinus Torvalds /* 16831da177e4SLinus Torvalds * A linked command should only terminate with one of these messages 16841da177e4SLinus Torvalds * if there are more linked commands available. 16851da177e4SLinus Torvalds */ 16861da177e4SLinus Torvalds if (!host->SCpnt->next_link) { 16871da177e4SLinus Torvalds printk(KERN_WARNING "scsi%d.%c: lun %d tag %d linked command complete, but no next_link\n", 16881da177e4SLinus Torvalds instance->host_no, acornscsi_target(host), host->SCpnt->tag); 16891da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16901da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 16911da177e4SLinus Torvalds } else { 1692ee0ca6baSHenne struct scsi_cmnd *SCpnt = host->SCpnt; 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds host->SCpnt = host->SCpnt->next_link; 16971da177e4SLinus Torvalds host->SCpnt->tag = SCpnt->tag; 16981da177e4SLinus Torvalds SCpnt->result = DID_OK | host->scsi.SCp.Message << 8 | host->Scsi.SCp.Status; 16991da177e4SLinus Torvalds SCpnt->done(SCpnt); 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds /* initialise host->SCpnt->SCp */ 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds break; 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds #endif 17061da177e4SLinus Torvalds 17071da177e4SLinus Torvalds default: /* reject message */ 17081da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", 17091da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 17101da177e4SLinus Torvalds message[0]); 17111da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 17121da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 17131da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 17141da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 17151da177e4SLinus Torvalds break; 17161da177e4SLinus Torvalds } 17171da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds /* 17211da177e4SLinus Torvalds * Function: int acornscsi_buildmessages(AS_Host *host) 17221da177e4SLinus Torvalds * Purpose : build the connection messages for a host 17231da177e4SLinus Torvalds * Params : host - host to add messages to 17241da177e4SLinus Torvalds */ 17251da177e4SLinus Torvalds static 17261da177e4SLinus Torvalds void acornscsi_buildmessages(AS_Host *host) 17271da177e4SLinus Torvalds { 17281da177e4SLinus Torvalds #if 0 17291da177e4SLinus Torvalds /* does the device need resetting? */ 17301da177e4SLinus Torvalds if (cmd_reset) { 17311da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); 17321da177e4SLinus Torvalds return; 17331da177e4SLinus Torvalds } 17341da177e4SLinus Torvalds #endif 17351da177e4SLinus Torvalds 17361da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, 17371da177e4SLinus Torvalds IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, 17381da177e4SLinus Torvalds host->SCpnt->device->lun)); 17391da177e4SLinus Torvalds 17401da177e4SLinus Torvalds #if 0 17411da177e4SLinus Torvalds /* does the device need the current command aborted */ 17421da177e4SLinus Torvalds if (cmd_aborted) { 17431da177e4SLinus Torvalds acornscsi_abortcmd(host->SCpnt->tag); 17441da177e4SLinus Torvalds return; 17451da177e4SLinus Torvalds } 17461da177e4SLinus Torvalds #endif 17471da177e4SLinus Torvalds 17481da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 17491da177e4SLinus Torvalds if (host->SCpnt->tag) { 17501da177e4SLinus Torvalds unsigned int tag_type; 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds if (host->SCpnt->cmnd[0] == REQUEST_SENSE || 17531da177e4SLinus Torvalds host->SCpnt->cmnd[0] == TEST_UNIT_READY || 17541da177e4SLinus Torvalds host->SCpnt->cmnd[0] == INQUIRY) 17551da177e4SLinus Torvalds tag_type = HEAD_OF_QUEUE_TAG; 17561da177e4SLinus Torvalds else 17571da177e4SLinus Torvalds tag_type = SIMPLE_QUEUE_TAG; 17581da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); 17591da177e4SLinus Torvalds } 17601da177e4SLinus Torvalds #endif 17611da177e4SLinus Torvalds 17621da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 17631da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { 17641da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; 17651da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, 17661da177e4SLinus Torvalds EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 17671da177e4SLinus Torvalds sdtr_period / 4, sdtr_size); 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds #endif 17701da177e4SLinus Torvalds } 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds /* 17731da177e4SLinus Torvalds * Function: int acornscsi_starttransfer(AS_Host *host) 17741da177e4SLinus Torvalds * Purpose : transfer data to/from connected target 17751da177e4SLinus Torvalds * Params : host - host to which target is connected 17761da177e4SLinus Torvalds * Returns : 0 if failure 17771da177e4SLinus Torvalds */ 17781da177e4SLinus Torvalds static 17791da177e4SLinus Torvalds int acornscsi_starttransfer(AS_Host *host) 17801da177e4SLinus Torvalds { 17811da177e4SLinus Torvalds int residual; 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { 17841da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", 17851da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 17861da177e4SLinus Torvalds return 0; 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds 178984ac86caSBoaz Harrosh residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; 17901da177e4SLinus Torvalds 1791ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1792ffd7858dSRussell King sbic_arm_writenext(host, residual >> 16); 1793ffd7858dSRussell King sbic_arm_writenext(host, residual >> 8); 1794ffd7858dSRussell King sbic_arm_writenext(host, residual); 17951da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 17961da177e4SLinus Torvalds return 1; 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvalds /* ========================================================================================= 18001da177e4SLinus Torvalds * Connection & Disconnection 18011da177e4SLinus Torvalds */ 18021da177e4SLinus Torvalds /* 18031da177e4SLinus Torvalds * Function : acornscsi_reconnect(AS_Host *host) 18041da177e4SLinus Torvalds * Purpose : reconnect a previously disconnected command 18051da177e4SLinus Torvalds * Params : host - host specific data 18061da177e4SLinus Torvalds * Remarks : SCSI spec says: 18071da177e4SLinus Torvalds * 'The set of active pointers is restored from the set 18081da177e4SLinus Torvalds * of saved pointers upon reconnection of the I/O process' 18091da177e4SLinus Torvalds */ 18101da177e4SLinus Torvalds static 18111da177e4SLinus Torvalds int acornscsi_reconnect(AS_Host *host) 18121da177e4SLinus Torvalds { 18131da177e4SLinus Torvalds unsigned int target, lun, ok = 0; 18141da177e4SLinus Torvalds 1815ffd7858dSRussell King target = sbic_arm_read(host, SBIC_SOURCEID); 18161da177e4SLinus Torvalds 18171da177e4SLinus Torvalds if (!(target & 8)) 18181da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: invalid source id after reselection " 18191da177e4SLinus Torvalds "- device fault?\n", 18201da177e4SLinus Torvalds host->host->host_no); 18211da177e4SLinus Torvalds 18221da177e4SLinus Torvalds target &= 7; 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) { 18251da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%d: reconnected while command in " 18261da177e4SLinus Torvalds "progress to target %d?\n", 18271da177e4SLinus Torvalds host->host->host_no, target, host->SCpnt->device->id); 18281da177e4SLinus Torvalds host->SCpnt = NULL; 18291da177e4SLinus Torvalds } 18301da177e4SLinus Torvalds 1831ffd7858dSRussell King lun = sbic_arm_read(host, SBIC_DATA) & 7; 18321da177e4SLinus Torvalds 18331da177e4SLinus Torvalds host->scsi.reconnected.target = target; 18341da177e4SLinus Torvalds host->scsi.reconnected.lun = lun; 18351da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 18361da177e4SLinus Torvalds 18371da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt && 18381da177e4SLinus Torvalds host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) 18391da177e4SLinus Torvalds ok = 1; 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) 18421da177e4SLinus Torvalds ok = 1; 18431da177e4SLinus Torvalds 18441da177e4SLinus Torvalds ADD_STATUS(target, 0x81, host->scsi.phase, 0); 18451da177e4SLinus Torvalds 18461da177e4SLinus Torvalds if (ok) { 18471da177e4SLinus Torvalds host->scsi.phase = PHASE_RECONNECTED; 18481da177e4SLinus Torvalds } else { 18491da177e4SLinus Torvalds /* this doesn't seem to work */ 18501da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: reselected with no command " 18511da177e4SLinus Torvalds "to reconnect with\n", 18521da177e4SLinus Torvalds host->host->host_no, '0' + target); 18531da177e4SLinus Torvalds acornscsi_dumplog(host, target); 18541da177e4SLinus Torvalds acornscsi_abortcmd(host, 0); 18551da177e4SLinus Torvalds if (host->SCpnt) { 18561da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18571da177e4SLinus Torvalds host->SCpnt = NULL; 18581da177e4SLinus Torvalds } 18591da177e4SLinus Torvalds } 18601da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 18611da177e4SLinus Torvalds return !ok; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 18641da177e4SLinus Torvalds /* 18651da177e4SLinus Torvalds * Function: int acornscsi_reconect_finish(AS_Host *host) 18661da177e4SLinus Torvalds * Purpose : finish reconnecting a command 18671da177e4SLinus Torvalds * Params : host - host to complete 18681da177e4SLinus Torvalds * Returns : 0 if failed 18691da177e4SLinus Torvalds */ 18701da177e4SLinus Torvalds static 18711da177e4SLinus Torvalds int acornscsi_reconnect_finish(AS_Host *host) 18721da177e4SLinus Torvalds { 18731da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 18741da177e4SLinus Torvalds host->scsi.disconnectable = 0; 18751da177e4SLinus Torvalds if (host->SCpnt->device->id == host->scsi.reconnected.target && 18761da177e4SLinus Torvalds host->SCpnt->device->lun == host->scsi.reconnected.lun && 18771da177e4SLinus Torvalds host->SCpnt->tag == host->scsi.reconnected.tag) { 18781da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18791da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: reconnected", 18801da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18811da177e4SLinus Torvalds #endif 18821da177e4SLinus Torvalds } else { 18831da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18841da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18851da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to move command " 18861da177e4SLinus Torvalds "to disconnected queue\n", 18871da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18881da177e4SLinus Torvalds #endif 18891da177e4SLinus Torvalds host->SCpnt = NULL; 18901da177e4SLinus Torvalds } 18911da177e4SLinus Torvalds } 18921da177e4SLinus Torvalds if (!host->SCpnt) { 18931da177e4SLinus Torvalds host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, 18941da177e4SLinus Torvalds host->scsi.reconnected.target, 18951da177e4SLinus Torvalds host->scsi.reconnected.lun, 18961da177e4SLinus Torvalds host->scsi.reconnected.tag); 18971da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18981da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to get command", 18991da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 19001da177e4SLinus Torvalds #endif 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds 19031da177e4SLinus Torvalds if (!host->SCpnt) 19041da177e4SLinus Torvalds acornscsi_abortcmd(host, host->scsi.reconnected.tag); 19051da177e4SLinus Torvalds else { 19061da177e4SLinus Torvalds /* 19071da177e4SLinus Torvalds * Restore data pointer from SAVED pointers. 19081da177e4SLinus Torvalds */ 19091da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 19101da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 19111da177e4SLinus Torvalds printk(", data pointers: [%p, %X]", 19121da177e4SLinus Torvalds host->scsi.SCp.ptr, host->scsi.SCp.this_residual); 19131da177e4SLinus Torvalds #endif 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 19161da177e4SLinus Torvalds printk("\n"); 19171da177e4SLinus Torvalds #endif 19181da177e4SLinus Torvalds 19191da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds return host->SCpnt != NULL; 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds 19241da177e4SLinus Torvalds /* 19251da177e4SLinus Torvalds * Function: void acornscsi_disconnect_unexpected(AS_Host *host) 19261da177e4SLinus Torvalds * Purpose : handle an unexpected disconnect 19271da177e4SLinus Torvalds * Params : host - host on which disconnect occurred 19281da177e4SLinus Torvalds */ 19291da177e4SLinus Torvalds static 19301da177e4SLinus Torvalds void acornscsi_disconnect_unexpected(AS_Host *host) 19311da177e4SLinus Torvalds { 19321da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", 19331da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 19341da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 19351da177e4SLinus Torvalds acornscsi_dumplog(host, 8); 19361da177e4SLinus Torvalds #endif 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds /* 19421da177e4SLinus Torvalds * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) 19431da177e4SLinus Torvalds * Purpose : abort a currently executing command 19441da177e4SLinus Torvalds * Params : host - host with connected command to abort 19451da177e4SLinus Torvalds * tag - tag to abort 19461da177e4SLinus Torvalds */ 19471da177e4SLinus Torvalds static 19481da177e4SLinus Torvalds void acornscsi_abortcmd(AS_Host *host, unsigned char tag) 19491da177e4SLinus Torvalds { 19501da177e4SLinus Torvalds host->scsi.phase = PHASE_ABORTED; 1951ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN); 19521da177e4SLinus Torvalds 19531da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19541da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 19551da177e4SLinus Torvalds if (tag) 19561da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); 19571da177e4SLinus Torvalds else 19581da177e4SLinus Torvalds #endif 19591da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds /* ========================================================================================== 19631da177e4SLinus Torvalds * Interrupt routines. 19641da177e4SLinus Torvalds */ 19651da177e4SLinus Torvalds /* 19661da177e4SLinus Torvalds * Function: int acornscsi_sbicintr(AS_Host *host) 19671da177e4SLinus Torvalds * Purpose : handle interrupts from SCSI device 19681da177e4SLinus Torvalds * Params : host - host to process 19691da177e4SLinus Torvalds * Returns : INTR_PROCESS if expecting another SBIC interrupt 19701da177e4SLinus Torvalds * INTR_IDLE if no interrupt 19711da177e4SLinus Torvalds * INTR_NEXT_COMMAND if we have finished processing the command 19721da177e4SLinus Torvalds */ 19731da177e4SLinus Torvalds static 19741da177e4SLinus Torvalds intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) 19751da177e4SLinus Torvalds { 19761da177e4SLinus Torvalds unsigned int asr, ssr; 19771da177e4SLinus Torvalds 1978ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 19791da177e4SLinus Torvalds if (!(asr & ASR_INT)) 19801da177e4SLinus Torvalds return INTR_IDLE; 19811da177e4SLinus Torvalds 1982ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds #if (DEBUG & DEBUG_PHASES) 19851da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 19861da177e4SLinus Torvalds #endif 19871da177e4SLinus Torvalds 19881da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, in_irq); 19891da177e4SLinus Torvalds 19901da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) 19911da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 19921da177e4SLinus Torvalds 19931da177e4SLinus Torvalds switch (ssr) { 19941da177e4SLinus Torvalds case 0x00: /* reset state - not advanced */ 19951da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", 19961da177e4SLinus Torvalds host->host->host_no); 19971da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 1998ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 1999ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 20001da177e4SLinus Torvalds return INTR_IDLE; 20011da177e4SLinus Torvalds 20021da177e4SLinus Torvalds case 0x01: /* reset state - advanced */ 2003ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 2004ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 2005ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 2006ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 20071da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 20081da177e4SLinus Torvalds return INTR_IDLE; 20091da177e4SLinus Torvalds 20101da177e4SLinus Torvalds case 0x41: /* unexpected disconnect aborted command */ 20111da177e4SLinus Torvalds acornscsi_disconnect_unexpected(host); 20121da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 20131da177e4SLinus Torvalds } 20141da177e4SLinus Torvalds 20151da177e4SLinus Torvalds switch (host->scsi.phase) { 20161da177e4SLinus Torvalds case PHASE_CONNECTING: /* STATE: command removed from issue queue */ 20171da177e4SLinus Torvalds switch (ssr) { 20181da177e4SLinus Torvalds case 0x11: /* -> PHASE_CONNECTED */ 20191da177e4SLinus Torvalds /* BUS FREE -> SELECTION */ 20201da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTED; 20211da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 20221da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 20231da177e4SLinus Torvalds /* 33C93 gives next interrupt indicating bus phase */ 2024ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 20251da177e4SLinus Torvalds if (!(asr & ASR_INT)) 20261da177e4SLinus Torvalds break; 2027ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 20281da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, 1); 20291da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); 20301da177e4SLinus Torvalds goto connected; 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds case 0x42: /* select timed out */ 20331da177e4SLinus Torvalds /* -> PHASE_IDLE */ 20341da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); 20351da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 20381da177e4SLinus Torvalds /* BUS FREE -> RESELECTION */ 20391da177e4SLinus Torvalds host->origSCpnt = host->SCpnt; 20401da177e4SLinus Torvalds host->SCpnt = NULL; 20411da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 20421da177e4SLinus Torvalds acornscsi_reconnect(host); 20431da177e4SLinus Torvalds break; 20441da177e4SLinus Torvalds 20451da177e4SLinus Torvalds default: 20461da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", 20471da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20481da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20491da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20501da177e4SLinus Torvalds } 20511da177e4SLinus Torvalds return INTR_PROCESSING; 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds connected: 20541da177e4SLinus Torvalds case PHASE_CONNECTED: /* STATE: device selected ok */ 20551da177e4SLinus Torvalds switch (ssr) { 20561da177e4SLinus Torvalds #ifdef NONSTANDARD 20571da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20581da177e4SLinus Torvalds /* SELECTION -> COMMAND */ 20591da177e4SLinus Torvalds acornscsi_sendcommand(host); 20601da177e4SLinus Torvalds break; 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 20631da177e4SLinus Torvalds /* SELECTION -> STATUS */ 20641da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 20651da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 20661da177e4SLinus Torvalds break; 20671da177e4SLinus Torvalds #endif 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 20701da177e4SLinus Torvalds /* SELECTION ->MESSAGE OUT */ 20711da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGOUT; 20721da177e4SLinus Torvalds acornscsi_buildmessages(host); 20731da177e4SLinus Torvalds acornscsi_sendmessage(host); 20741da177e4SLinus Torvalds break; 20751da177e4SLinus Torvalds 20761da177e4SLinus Torvalds /* these should not happen */ 20771da177e4SLinus Torvalds case 0x85: /* target disconnected */ 20781da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 20791da177e4SLinus Torvalds break; 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds default: 20821da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", 20831da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20841da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20851da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds return INTR_PROCESSING; 20881da177e4SLinus Torvalds 20891da177e4SLinus Torvalds case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ 20901da177e4SLinus Torvalds /* 20911da177e4SLinus Torvalds * SCSI standard says that MESSAGE OUT phases can be followed by a 20921da177e4SLinus Torvalds * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase 20931da177e4SLinus Torvalds */ 20941da177e4SLinus Torvalds switch (ssr) { 20951da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20961da177e4SLinus Torvalds case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20971da177e4SLinus Torvalds /* MESSAGE OUT -> COMMAND */ 20981da177e4SLinus Torvalds acornscsi_sendcommand(host); 20991da177e4SLinus Torvalds break; 21001da177e4SLinus Torvalds 21011da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 21021da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 21031da177e4SLinus Torvalds /* MESSAGE OUT -> STATUS */ 21041da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21051da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21061da177e4SLinus Torvalds break; 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 21091da177e4SLinus Torvalds /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ 21101da177e4SLinus Torvalds acornscsi_sendmessage(host); 21111da177e4SLinus Torvalds break; 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvalds case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21141da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21151da177e4SLinus Torvalds /* MESSAGE OUT -> MESSAGE IN */ 21161da177e4SLinus Torvalds acornscsi_message(host); 21171da177e4SLinus Torvalds break; 21181da177e4SLinus Torvalds 21191da177e4SLinus Torvalds default: 21201da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", 21211da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21221da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21231da177e4SLinus Torvalds } 21241da177e4SLinus Torvalds return INTR_PROCESSING; 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvalds case PHASE_COMMAND: /* STATE: connected & command sent */ 21271da177e4SLinus Torvalds switch (ssr) { 21281da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 21291da177e4SLinus Torvalds /* COMMAND -> DATA OUT */ 21301da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 21311da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21321da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 21331da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21341da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21351da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 21361da177e4SLinus Torvalds return INTR_IDLE; 21371da177e4SLinus Torvalds 21381da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 21391da177e4SLinus Torvalds /* COMMAND -> DATA IN */ 21401da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 21411da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21421da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 21431da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21441da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21451da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 21461da177e4SLinus Torvalds return INTR_IDLE; 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 21491da177e4SLinus Torvalds /* COMMAND -> STATUS */ 21501da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21511da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21521da177e4SLinus Torvalds break; 21531da177e4SLinus Torvalds 21541da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 21551da177e4SLinus Torvalds /* COMMAND -> MESSAGE OUT */ 21561da177e4SLinus Torvalds acornscsi_sendmessage(host); 21571da177e4SLinus Torvalds break; 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21601da177e4SLinus Torvalds /* COMMAND -> MESSAGE IN */ 21611da177e4SLinus Torvalds acornscsi_message(host); 21621da177e4SLinus Torvalds break; 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds default: 21651da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n", 21661da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21671da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21681da177e4SLinus Torvalds } 21691da177e4SLinus Torvalds return INTR_PROCESSING; 21701da177e4SLinus Torvalds 21711da177e4SLinus Torvalds case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ 21721da177e4SLinus Torvalds if (ssr == 0x85) { /* -> PHASE_IDLE */ 21731da177e4SLinus Torvalds host->scsi.disconnectable = 1; 21741da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 21751da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 21761da177e4SLinus Torvalds host->stats.disconnects += 1; 21771da177e4SLinus Torvalds } else { 21781da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", 21791da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21801da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21811da177e4SLinus Torvalds } 21821da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds case PHASE_IDLE: /* STATE: disconnected */ 21851da177e4SLinus Torvalds if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 21861da177e4SLinus Torvalds acornscsi_reconnect(host); 21871da177e4SLinus Torvalds else { 21881da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", 21891da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21901da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21911da177e4SLinus Torvalds } 21921da177e4SLinus Torvalds return INTR_PROCESSING; 21931da177e4SLinus Torvalds 21941da177e4SLinus Torvalds case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ 21951da177e4SLinus Torvalds /* 21961da177e4SLinus Torvalds * Command reconnected - if MESGIN, get message - it may be 21971da177e4SLinus Torvalds * the tag. If not, get command out of disconnected queue 21981da177e4SLinus Torvalds */ 21991da177e4SLinus Torvalds /* 22001da177e4SLinus Torvalds * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, 22011da177e4SLinus Torvalds * reconnect I_T_L command 22021da177e4SLinus Torvalds */ 22031da177e4SLinus Torvalds if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) 22041da177e4SLinus Torvalds return INTR_IDLE; 22051da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 22061da177e4SLinus Torvalds switch (ssr) { 22071da177e4SLinus Torvalds case 0x88: /* data out phase */ 22081da177e4SLinus Torvalds /* -> PHASE_DATAOUT */ 22091da177e4SLinus Torvalds /* MESSAGE IN -> DATA OUT */ 22101da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 22111da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 22121da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22131da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 22141da177e4SLinus Torvalds return INTR_IDLE; 22151da177e4SLinus Torvalds 22161da177e4SLinus Torvalds case 0x89: /* data in phase */ 22171da177e4SLinus Torvalds /* -> PHASE_DATAIN */ 22181da177e4SLinus Torvalds /* MESSAGE IN -> DATA IN */ 22191da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 22201da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 22211da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22221da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 22231da177e4SLinus Torvalds return INTR_IDLE; 22241da177e4SLinus Torvalds 22251da177e4SLinus Torvalds case 0x8a: /* command out */ 22261da177e4SLinus Torvalds /* MESSAGE IN -> COMMAND */ 22271da177e4SLinus Torvalds acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 22281da177e4SLinus Torvalds break; 22291da177e4SLinus Torvalds 22301da177e4SLinus Torvalds case 0x8b: /* status in */ 22311da177e4SLinus Torvalds /* -> PHASE_STATUSIN */ 22321da177e4SLinus Torvalds /* MESSAGE IN -> STATUS */ 22331da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22341da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22351da177e4SLinus Torvalds break; 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvalds case 0x8e: /* message out */ 22381da177e4SLinus Torvalds /* -> PHASE_MSGOUT */ 22391da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 22401da177e4SLinus Torvalds acornscsi_sendmessage(host); 22411da177e4SLinus Torvalds break; 22421da177e4SLinus Torvalds 22431da177e4SLinus Torvalds case 0x8f: /* message in */ 22441da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 22451da177e4SLinus Torvalds break; 22461da177e4SLinus Torvalds 22471da177e4SLinus Torvalds default: 22481da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", 22491da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22501da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 22511da177e4SLinus Torvalds } 22521da177e4SLinus Torvalds return INTR_PROCESSING; 22531da177e4SLinus Torvalds 22541da177e4SLinus Torvalds case PHASE_DATAIN: /* STATE: transferred data in */ 22551da177e4SLinus Torvalds /* 22561da177e4SLinus Torvalds * This is simple - if we disconnect then the DMA address & count is 22571da177e4SLinus Torvalds * correct. 22581da177e4SLinus Torvalds */ 22591da177e4SLinus Torvalds switch (ssr) { 22601da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 22611da177e4SLinus Torvalds case 0x89: /* -> PHASE_DATAIN */ 22621da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22631da177e4SLinus Torvalds return INTR_IDLE; 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 22661da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 22671da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 22681da177e4SLinus Torvalds /* DATA IN -> STATUS */ 226984ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22701da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22711da177e4SLinus Torvalds acornscsi_dma_stop(host); 22721da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22731da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22741da177e4SLinus Torvalds break; 22751da177e4SLinus Torvalds 22761da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 22771da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 22781da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 22791da177e4SLinus Torvalds /* DATA IN -> MESSAGE OUT */ 228084ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22811da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22821da177e4SLinus Torvalds acornscsi_dma_stop(host); 22831da177e4SLinus Torvalds acornscsi_sendmessage(host); 22841da177e4SLinus Torvalds break; 22851da177e4SLinus Torvalds 22861da177e4SLinus Torvalds case 0x1f: /* message in */ 22871da177e4SLinus Torvalds case 0x4f: /* message in */ 22881da177e4SLinus Torvalds case 0x8f: /* message in */ 22891da177e4SLinus Torvalds /* DATA IN -> MESSAGE IN */ 229084ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22911da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22921da177e4SLinus Torvalds acornscsi_dma_stop(host); 22931da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 22941da177e4SLinus Torvalds break; 22951da177e4SLinus Torvalds 22961da177e4SLinus Torvalds default: 22971da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", 22981da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22991da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds return INTR_PROCESSING; 23021da177e4SLinus Torvalds 23031da177e4SLinus Torvalds case PHASE_DATAOUT: /* STATE: transferred data out */ 23041da177e4SLinus Torvalds /* 23051da177e4SLinus Torvalds * This is more complicated - if we disconnect, the DMA could be 12 23061da177e4SLinus Torvalds * bytes ahead of us. We need to correct this. 23071da177e4SLinus Torvalds */ 23081da177e4SLinus Torvalds switch (ssr) { 23091da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 23101da177e4SLinus Torvalds case 0x88: /* -> PHASE_DATAOUT */ 23111da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 23121da177e4SLinus Torvalds return INTR_IDLE; 23131da177e4SLinus Torvalds 23141da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 23151da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 23161da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 23171da177e4SLinus Torvalds /* DATA OUT -> STATUS */ 231884ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 23191da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 23201da177e4SLinus Torvalds acornscsi_dma_stop(host); 23211da177e4SLinus Torvalds acornscsi_dma_adjust(host); 23221da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 23231da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 23241da177e4SLinus Torvalds break; 23251da177e4SLinus Torvalds 23261da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23271da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 23281da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23291da177e4SLinus Torvalds /* DATA OUT -> MESSAGE OUT */ 233084ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 23311da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 23321da177e4SLinus Torvalds acornscsi_dma_stop(host); 23331da177e4SLinus Torvalds acornscsi_dma_adjust(host); 23341da177e4SLinus Torvalds acornscsi_sendmessage(host); 23351da177e4SLinus Torvalds break; 23361da177e4SLinus Torvalds 23371da177e4SLinus Torvalds case 0x1f: /* message in */ 23381da177e4SLinus Torvalds case 0x4f: /* message in */ 23391da177e4SLinus Torvalds case 0x8f: /* message in */ 23401da177e4SLinus Torvalds /* DATA OUT -> MESSAGE IN */ 234184ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 23421da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 23431da177e4SLinus Torvalds acornscsi_dma_stop(host); 23441da177e4SLinus Torvalds acornscsi_dma_adjust(host); 23451da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 23461da177e4SLinus Torvalds break; 23471da177e4SLinus Torvalds 23481da177e4SLinus Torvalds default: 23491da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", 23501da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23511da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23521da177e4SLinus Torvalds } 23531da177e4SLinus Torvalds return INTR_PROCESSING; 23541da177e4SLinus Torvalds 23551da177e4SLinus Torvalds case PHASE_STATUSIN: /* STATE: status in complete */ 23561da177e4SLinus Torvalds switch (ssr) { 23571da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23581da177e4SLinus Torvalds case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23591da177e4SLinus Torvalds /* STATUS -> MESSAGE IN */ 23601da177e4SLinus Torvalds acornscsi_message(host); 23611da177e4SLinus Torvalds break; 23621da177e4SLinus Torvalds 23631da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23641da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23651da177e4SLinus Torvalds /* STATUS -> MESSAGE OUT */ 23661da177e4SLinus Torvalds acornscsi_sendmessage(host); 23671da177e4SLinus Torvalds break; 23681da177e4SLinus Torvalds 23691da177e4SLinus Torvalds default: 23701da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", 23711da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23721da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23731da177e4SLinus Torvalds } 23741da177e4SLinus Torvalds return INTR_PROCESSING; 23751da177e4SLinus Torvalds 23761da177e4SLinus Torvalds case PHASE_MSGIN: /* STATE: message in */ 23771da177e4SLinus Torvalds switch (ssr) { 23781da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23791da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 23801da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23811da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 23821da177e4SLinus Torvalds acornscsi_sendmessage(host); 23831da177e4SLinus Torvalds break; 23841da177e4SLinus Torvalds 23851da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23861da177e4SLinus Torvalds case 0x2f: 23871da177e4SLinus Torvalds case 0x4f: 23881da177e4SLinus Torvalds case 0x8f: 23891da177e4SLinus Torvalds acornscsi_message(host); 23901da177e4SLinus Torvalds break; 23911da177e4SLinus Torvalds 23921da177e4SLinus Torvalds case 0x85: 23931da177e4SLinus Torvalds printk("scsi%d.%c: strange message in disconnection\n", 23941da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 23951da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23961da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 23971da177e4SLinus Torvalds break; 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds default: 24001da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", 24011da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24021da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24031da177e4SLinus Torvalds } 24041da177e4SLinus Torvalds return INTR_PROCESSING; 24051da177e4SLinus Torvalds 24061da177e4SLinus Torvalds case PHASE_DONE: /* STATE: received status & message */ 24071da177e4SLinus Torvalds switch (ssr) { 24081da177e4SLinus Torvalds case 0x85: /* -> PHASE_IDLE */ 24091da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_OK); 24101da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 24111da177e4SLinus Torvalds 24121da177e4SLinus Torvalds case 0x1e: 24131da177e4SLinus Torvalds case 0x8e: 24141da177e4SLinus Torvalds acornscsi_sendmessage(host); 24151da177e4SLinus Torvalds break; 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds default: 24181da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", 24191da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24201da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24211da177e4SLinus Torvalds } 24221da177e4SLinus Torvalds return INTR_PROCESSING; 24231da177e4SLinus Torvalds 24241da177e4SLinus Torvalds case PHASE_ABORTED: 24251da177e4SLinus Torvalds switch (ssr) { 24261da177e4SLinus Torvalds case 0x85: 24271da177e4SLinus Torvalds if (host->SCpnt) 24281da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ABORT); 24291da177e4SLinus Torvalds else { 24301da177e4SLinus Torvalds clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, 24311da177e4SLinus Torvalds host->busyluns); 24321da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 24331da177e4SLinus Torvalds } 24341da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 24351da177e4SLinus Torvalds 24361da177e4SLinus Torvalds case 0x1e: 24371da177e4SLinus Torvalds case 0x2e: 24381da177e4SLinus Torvalds case 0x4e: 24391da177e4SLinus Torvalds case 0x8e: 24401da177e4SLinus Torvalds acornscsi_sendmessage(host); 24411da177e4SLinus Torvalds break; 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds default: 24441da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n", 24451da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24461da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds return INTR_PROCESSING; 24491da177e4SLinus Torvalds 24501da177e4SLinus Torvalds default: 24511da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", 24521da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24531da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds return INTR_PROCESSING; 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds /* 24597d12e780SDavid Howells * Prototype: void acornscsi_intr(int irq, void *dev_id) 24601da177e4SLinus Torvalds * Purpose : handle interrupts from Acorn SCSI card 24611da177e4SLinus Torvalds * Params : irq - interrupt number 24621da177e4SLinus Torvalds * dev_id - device specific data (AS_Host structure) 24631da177e4SLinus Torvalds */ 24641da177e4SLinus Torvalds static irqreturn_t 24657d12e780SDavid Howells acornscsi_intr(int irq, void *dev_id) 24661da177e4SLinus Torvalds { 24671da177e4SLinus Torvalds AS_Host *host = (AS_Host *)dev_id; 24681da177e4SLinus Torvalds intr_ret_t ret; 24691da177e4SLinus Torvalds int iostatus; 24701da177e4SLinus Torvalds int in_irq = 0; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds do { 24731da177e4SLinus Torvalds ret = INTR_IDLE; 24741da177e4SLinus Torvalds 2475e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24761da177e4SLinus Torvalds 24771da177e4SLinus Torvalds if (iostatus & 2) { 24781da177e4SLinus Torvalds acornscsi_dma_intr(host); 2479e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds if (iostatus & 8) 24831da177e4SLinus Torvalds ret = acornscsi_sbicintr(host, in_irq); 24841da177e4SLinus Torvalds 24851da177e4SLinus Torvalds /* 24861da177e4SLinus Torvalds * If we have a transfer pending, start it. 24871da177e4SLinus Torvalds * Only start it if the interface has already started transferring 24881da177e4SLinus Torvalds * it's data 24891da177e4SLinus Torvalds */ 24901da177e4SLinus Torvalds if (host->dma.xfer_required) 24911da177e4SLinus Torvalds acornscsi_dma_xfer(host); 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds if (ret == INTR_NEXT_COMMAND) 24941da177e4SLinus Torvalds ret = acornscsi_kick(host); 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds in_irq = 1; 24971da177e4SLinus Torvalds } while (ret != INTR_IDLE); 24981da177e4SLinus Torvalds 24991da177e4SLinus Torvalds return IRQ_HANDLED; 25001da177e4SLinus Torvalds } 25011da177e4SLinus Torvalds 25021da177e4SLinus Torvalds /*============================================================================================= 25031da177e4SLinus Torvalds * Interfaces between interrupt handler and rest of scsi code 25041da177e4SLinus Torvalds */ 25051da177e4SLinus Torvalds 25061da177e4SLinus Torvalds /* 2507ee0ca6baSHenne * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 25081da177e4SLinus Torvalds * Purpose : queues a SCSI command 25091da177e4SLinus Torvalds * Params : cmd - SCSI command 25101da177e4SLinus Torvalds * done - function called on completion, with pointer to command descriptor 25111da177e4SLinus Torvalds * Returns : 0, or < 0 on error. 25121da177e4SLinus Torvalds */ 2513f281233dSJeff Garzik static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt, 2514ee0ca6baSHenne void (*done)(struct scsi_cmnd *)) 25151da177e4SLinus Torvalds { 25161da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 25171da177e4SLinus Torvalds 25181da177e4SLinus Torvalds if (!done) { 25191da177e4SLinus Torvalds /* there should be some way of rejecting errors like this without panicing... */ 25201da177e4SLinus Torvalds panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", 25211da177e4SLinus Torvalds host->host->host_no, SCpnt); 25221da177e4SLinus Torvalds return -EINVAL; 25231da177e4SLinus Torvalds } 25241da177e4SLinus Torvalds 25251da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 25261da177e4SLinus Torvalds if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { 25271da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", 25281da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id); 25291da177e4SLinus Torvalds SCpnt->result = DID_NO_CONNECT << 16; 25301da177e4SLinus Torvalds done(SCpnt); 25311da177e4SLinus Torvalds return 0; 25321da177e4SLinus Torvalds } 25331da177e4SLinus Torvalds #endif 25341da177e4SLinus Torvalds 25351da177e4SLinus Torvalds SCpnt->scsi_done = done; 25361da177e4SLinus Torvalds SCpnt->host_scribble = NULL; 25371da177e4SLinus Torvalds SCpnt->result = 0; 25381da177e4SLinus Torvalds SCpnt->tag = 0; 25391da177e4SLinus Torvalds SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); 25401da177e4SLinus Torvalds SCpnt->SCp.sent_command = 0; 25411da177e4SLinus Torvalds SCpnt->SCp.scsi_xferred = 0; 25421da177e4SLinus Torvalds 25431da177e4SLinus Torvalds init_SCp(SCpnt); 25441da177e4SLinus Torvalds 25451da177e4SLinus Torvalds host->stats.queues += 1; 25461da177e4SLinus Torvalds 25471da177e4SLinus Torvalds { 25481da177e4SLinus Torvalds unsigned long flags; 25491da177e4SLinus Torvalds 25501da177e4SLinus Torvalds if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { 25511da177e4SLinus Torvalds SCpnt->result = DID_ERROR << 16; 25521da177e4SLinus Torvalds done(SCpnt); 25531da177e4SLinus Torvalds return 0; 25541da177e4SLinus Torvalds } 25551da177e4SLinus Torvalds local_irq_save(flags); 25561da177e4SLinus Torvalds if (host->scsi.phase == PHASE_IDLE) 25571da177e4SLinus Torvalds acornscsi_kick(host); 25581da177e4SLinus Torvalds local_irq_restore(flags); 25591da177e4SLinus Torvalds } 25601da177e4SLinus Torvalds return 0; 25611da177e4SLinus Torvalds } 25621da177e4SLinus Torvalds 2563f281233dSJeff Garzik DEF_SCSI_QCMD(acornscsi_queuecmd) 2564f281233dSJeff Garzik 25651da177e4SLinus Torvalds /* 2566ee0ca6baSHenne * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result) 25671da177e4SLinus Torvalds * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 25681da177e4SLinus Torvalds * Params : SCpntp1 - pointer to command to return 25691da177e4SLinus Torvalds * SCpntp2 - pointer to command to check 25701da177e4SLinus Torvalds * result - result to pass back to mid-level done function 25711da177e4SLinus Torvalds * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. 25721da177e4SLinus Torvalds */ 2573ee0ca6baSHenne static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, 2574ee0ca6baSHenne struct scsi_cmnd **SCpntp2, 2575ee0ca6baSHenne int result) 25761da177e4SLinus Torvalds { 2577ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp1; 25781da177e4SLinus Torvalds 25791da177e4SLinus Torvalds if (SCpnt) { 25801da177e4SLinus Torvalds *SCpntp1 = NULL; 25811da177e4SLinus Torvalds 25821da177e4SLinus Torvalds SCpnt->result = result; 25831da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 25841da177e4SLinus Torvalds } 25851da177e4SLinus Torvalds 25861da177e4SLinus Torvalds if (SCpnt == *SCpntp2) 25871da177e4SLinus Torvalds *SCpntp2 = NULL; 25881da177e4SLinus Torvalds } 25891da177e4SLinus Torvalds 25901da177e4SLinus Torvalds enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds /* 2593ee0ca6baSHenne * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) 25941da177e4SLinus Torvalds * Purpose : abort a command on this host 25951da177e4SLinus Torvalds * Params : SCpnt - command to abort 25961da177e4SLinus Torvalds * Returns : our abort status 25971da177e4SLinus Torvalds */ 2598ee0ca6baSHenne static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt) 25991da177e4SLinus Torvalds { 26001da177e4SLinus Torvalds enum res_abort res = res_not_running; 26011da177e4SLinus Torvalds 26021da177e4SLinus Torvalds if (queue_remove_cmd(&host->queues.issue, SCpnt)) { 26031da177e4SLinus Torvalds /* 26041da177e4SLinus Torvalds * The command was on the issue queue, and has not been 26051da177e4SLinus Torvalds * issued yet. We can remove the command from the queue, 26061da177e4SLinus Torvalds * and acknowledge the abort. Neither the devices nor the 26071da177e4SLinus Torvalds * interface know about the command. 26081da177e4SLinus Torvalds */ 26091da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26101da177e4SLinus Torvalds printk("on issue queue "); 26111da177e4SLinus Torvalds //#endif 26121da177e4SLinus Torvalds res = res_success; 26131da177e4SLinus Torvalds } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { 26141da177e4SLinus Torvalds /* 26151da177e4SLinus Torvalds * The command was on the disconnected queue. Simply 26161da177e4SLinus Torvalds * acknowledge the abort condition, and when the target 26171da177e4SLinus Torvalds * reconnects, we will give it an ABORT message. The 26181da177e4SLinus Torvalds * target should then disconnect, and we will clear 26191da177e4SLinus Torvalds * the busylun bit. 26201da177e4SLinus Torvalds */ 26211da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26221da177e4SLinus Torvalds printk("on disconnected queue "); 26231da177e4SLinus Torvalds //#endif 26241da177e4SLinus Torvalds res = res_success; 26251da177e4SLinus Torvalds } else if (host->SCpnt == SCpnt) { 26261da177e4SLinus Torvalds unsigned long flags; 26271da177e4SLinus Torvalds 26281da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26291da177e4SLinus Torvalds printk("executing "); 26301da177e4SLinus Torvalds //#endif 26311da177e4SLinus Torvalds 26321da177e4SLinus Torvalds local_irq_save(flags); 26331da177e4SLinus Torvalds switch (host->scsi.phase) { 26341da177e4SLinus Torvalds /* 26351da177e4SLinus Torvalds * If the interface is idle, and the command is 'disconnectable', 26361da177e4SLinus Torvalds * then it is the same as on the disconnected queue. We simply 26371da177e4SLinus Torvalds * remove all traces of the command. When the target reconnects, 26381da177e4SLinus Torvalds * we will give it an ABORT message since the command could not 26391da177e4SLinus Torvalds * be found. When the target finally disconnects, we will clear 26401da177e4SLinus Torvalds * the busylun bit. 26411da177e4SLinus Torvalds */ 26421da177e4SLinus Torvalds case PHASE_IDLE: 26431da177e4SLinus Torvalds if (host->scsi.disconnectable) { 26441da177e4SLinus Torvalds host->scsi.disconnectable = 0; 26451da177e4SLinus Torvalds host->SCpnt = NULL; 26461da177e4SLinus Torvalds res = res_success; 26471da177e4SLinus Torvalds } 26481da177e4SLinus Torvalds break; 26491da177e4SLinus Torvalds 26501da177e4SLinus Torvalds /* 26511da177e4SLinus Torvalds * If the command has connected and done nothing further, 26521da177e4SLinus Torvalds * simply force a disconnect. We also need to clear the 26531da177e4SLinus Torvalds * busylun bit. 26541da177e4SLinus Torvalds */ 26551da177e4SLinus Torvalds case PHASE_CONNECTED: 2656ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT); 26571da177e4SLinus Torvalds host->SCpnt = NULL; 26581da177e4SLinus Torvalds res = res_success_clear; 26591da177e4SLinus Torvalds break; 26601da177e4SLinus Torvalds 26611da177e4SLinus Torvalds default: 26621da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 26631da177e4SLinus Torvalds res = res_snooze; 26641da177e4SLinus Torvalds } 26651da177e4SLinus Torvalds local_irq_restore(flags); 26661da177e4SLinus Torvalds } else if (host->origSCpnt == SCpnt) { 26671da177e4SLinus Torvalds /* 26681da177e4SLinus Torvalds * The command will be executed next, but a command 26691da177e4SLinus Torvalds * is currently using the interface. This is similar to 26701da177e4SLinus Torvalds * being on the issue queue, except the busylun bit has 26711da177e4SLinus Torvalds * been set. 26721da177e4SLinus Torvalds */ 26731da177e4SLinus Torvalds host->origSCpnt = NULL; 26741da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26751da177e4SLinus Torvalds printk("waiting for execution "); 26761da177e4SLinus Torvalds //#endif 26771da177e4SLinus Torvalds res = res_success_clear; 26781da177e4SLinus Torvalds } else 26791da177e4SLinus Torvalds printk("unknown "); 26801da177e4SLinus Torvalds 26811da177e4SLinus Torvalds return res; 26821da177e4SLinus Torvalds } 26831da177e4SLinus Torvalds 26841da177e4SLinus Torvalds /* 2685ee0ca6baSHenne * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) 26861da177e4SLinus Torvalds * Purpose : abort a command on this host 26871da177e4SLinus Torvalds * Params : SCpnt - command to abort 26881da177e4SLinus Torvalds * Returns : one of SCSI_ABORT_ macros 26891da177e4SLinus Torvalds */ 2690ee0ca6baSHenne int acornscsi_abort(struct scsi_cmnd *SCpnt) 26911da177e4SLinus Torvalds { 26921da177e4SLinus Torvalds AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; 26931da177e4SLinus Torvalds int result; 26941da177e4SLinus Torvalds 26951da177e4SLinus Torvalds host->stats.aborts += 1; 26961da177e4SLinus Torvalds 26971da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 26981da177e4SLinus Torvalds { 26991da177e4SLinus Torvalds int asr, ssr; 2700ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2701ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 27021da177e4SLinus Torvalds 27031da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_abort: "); 27041da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 27051da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 27061da177e4SLinus Torvalds } 27071da177e4SLinus Torvalds #endif 27081da177e4SLinus Torvalds 27091da177e4SLinus Torvalds printk("scsi%d: ", host->host->host_no); 27101da177e4SLinus Torvalds 27111da177e4SLinus Torvalds switch (acornscsi_do_abort(host, SCpnt)) { 27121da177e4SLinus Torvalds /* 27131da177e4SLinus Torvalds * We managed to find the command and cleared it out. 27141da177e4SLinus Torvalds * We do not expect the command to be executing on the 27151da177e4SLinus Torvalds * target, but we have set the busylun bit. 27161da177e4SLinus Torvalds */ 27171da177e4SLinus Torvalds case res_success_clear: 27181da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27191da177e4SLinus Torvalds printk("clear "); 27201da177e4SLinus Torvalds //#endif 27211da177e4SLinus Torvalds clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 27221da177e4SLinus Torvalds 27231da177e4SLinus Torvalds /* 27241da177e4SLinus Torvalds * We found the command, and cleared it out. Either 27251da177e4SLinus Torvalds * the command is still known to be executing on the 27261da177e4SLinus Torvalds * target, or the busylun bit is not set. 27271da177e4SLinus Torvalds */ 27281da177e4SLinus Torvalds case res_success: 27291da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27301da177e4SLinus Torvalds printk("success\n"); 27311da177e4SLinus Torvalds //#endif 2732324b9337SRussell King result = SUCCESS; 27331da177e4SLinus Torvalds break; 27341da177e4SLinus Torvalds 27351da177e4SLinus Torvalds /* 27361da177e4SLinus Torvalds * We did find the command, but unfortunately we couldn't 27371da177e4SLinus Torvalds * unhook it from ourselves. Wait some more, and if it 27381da177e4SLinus Torvalds * still doesn't complete, reset the interface. 27391da177e4SLinus Torvalds */ 27401da177e4SLinus Torvalds case res_snooze: 27411da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27421da177e4SLinus Torvalds printk("snooze\n"); 27431da177e4SLinus Torvalds //#endif 2744324b9337SRussell King result = FAILED; 27451da177e4SLinus Torvalds break; 27461da177e4SLinus Torvalds 27471da177e4SLinus Torvalds /* 27481da177e4SLinus Torvalds * The command could not be found (either because it completed, 27491da177e4SLinus Torvalds * or it got dropped. 27501da177e4SLinus Torvalds */ 27511da177e4SLinus Torvalds default: 27521da177e4SLinus Torvalds case res_not_running: 27531da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 2754324b9337SRussell King result = FAILED; 27551da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27561da177e4SLinus Torvalds printk("not running\n"); 27571da177e4SLinus Torvalds //#endif 27581da177e4SLinus Torvalds break; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds 27611da177e4SLinus Torvalds return result; 27621da177e4SLinus Torvalds } 27631da177e4SLinus Torvalds 27641da177e4SLinus Torvalds /* 2765324b9337SRussell King * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) 27661da177e4SLinus Torvalds * Purpose : reset a command on this host/reset this host 27671da177e4SLinus Torvalds * Params : SCpnt - command causing reset 27681da177e4SLinus Torvalds * Returns : one of SCSI_RESET_ macros 27691da177e4SLinus Torvalds */ 2770324b9337SRussell King int acornscsi_bus_reset(struct scsi_cmnd *SCpnt) 27711da177e4SLinus Torvalds { 27721da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 2773ee0ca6baSHenne struct scsi_cmnd *SCptr; 27741da177e4SLinus Torvalds 27751da177e4SLinus Torvalds host->stats.resets += 1; 27761da177e4SLinus Torvalds 27771da177e4SLinus Torvalds #if (DEBUG & DEBUG_RESET) 27781da177e4SLinus Torvalds { 27791da177e4SLinus Torvalds int asr, ssr; 27801da177e4SLinus Torvalds 2781ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2782ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 27831da177e4SLinus Torvalds 27841da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_reset: "); 27851da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 27861da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 27871da177e4SLinus Torvalds } 27881da177e4SLinus Torvalds #endif 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds acornscsi_dma_stop(host); 27911da177e4SLinus Torvalds 27921da177e4SLinus Torvalds /* 27931da177e4SLinus Torvalds * do hard reset. This resets all devices on this host, and so we 27941da177e4SLinus Torvalds * must set the reset status on all commands. 27951da177e4SLinus Torvalds */ 27961da177e4SLinus Torvalds acornscsi_resetcard(host); 27971da177e4SLinus Torvalds 27981da177e4SLinus Torvalds while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) 2799324b9337SRussell King ; 28001da177e4SLinus Torvalds 2801324b9337SRussell King return SUCCESS; 28021da177e4SLinus Torvalds } 28031da177e4SLinus Torvalds 28041da177e4SLinus Torvalds /*============================================================================================== 28051da177e4SLinus Torvalds * initialisation & miscellaneous support 28061da177e4SLinus Torvalds */ 28071da177e4SLinus Torvalds 28081da177e4SLinus Torvalds /* 28091da177e4SLinus Torvalds * Function: char *acornscsi_info(struct Scsi_Host *host) 28101da177e4SLinus Torvalds * Purpose : return a string describing this interface 28111da177e4SLinus Torvalds * Params : host - host to give information on 28121da177e4SLinus Torvalds * Returns : a constant string 28131da177e4SLinus Torvalds */ 28141da177e4SLinus Torvalds const 28151da177e4SLinus Torvalds char *acornscsi_info(struct Scsi_Host *host) 28161da177e4SLinus Torvalds { 28171da177e4SLinus Torvalds static char string[100], *p; 28181da177e4SLinus Torvalds 28191da177e4SLinus Torvalds p = string; 28201da177e4SLinus Torvalds 28211da177e4SLinus Torvalds p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" 28221da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 28231da177e4SLinus Torvalds " SYNC" 28241da177e4SLinus Torvalds #endif 28251da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 28261da177e4SLinus Torvalds " TAG" 28271da177e4SLinus Torvalds #endif 28281da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_LINK 28291da177e4SLinus Torvalds " LINK" 28301da177e4SLinus Torvalds #endif 28311da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2832a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 28331da177e4SLinus Torvalds #endif 28341da177e4SLinus Torvalds , host->hostt->name, host->io_port, host->irq, 28351da177e4SLinus Torvalds VER_MAJOR, VER_MINOR, VER_PATCH); 28361da177e4SLinus Torvalds return string; 28371da177e4SLinus Torvalds } 28381da177e4SLinus Torvalds 283956b8e8e5SAl Viro static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance) 28401da177e4SLinus Torvalds { 284156b8e8e5SAl Viro int devidx; 2842f64a181dSChristoph Hellwig struct scsi_device *scd; 28431da177e4SLinus Torvalds AS_Host *host; 28441da177e4SLinus Torvalds 28451da177e4SLinus Torvalds host = (AS_Host *)instance->hostdata; 28461da177e4SLinus Torvalds 284756b8e8e5SAl Viro seq_printf(m, "AcornSCSI driver v%d.%d.%d" 28481da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 28491da177e4SLinus Torvalds " SYNC" 28501da177e4SLinus Torvalds #endif 28511da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 28521da177e4SLinus Torvalds " TAG" 28531da177e4SLinus Torvalds #endif 28541da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_LINK 28551da177e4SLinus Torvalds " LINK" 28561da177e4SLinus Torvalds #endif 28571da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2858a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 28591da177e4SLinus Torvalds #endif 28601da177e4SLinus Torvalds "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); 28611da177e4SLinus Torvalds 286256b8e8e5SAl Viro seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n", 2863e95a1b65SRussell King host->base + SBIC_REGIDX, host->scsi.irq); 28641da177e4SLinus Torvalds #ifdef USE_DMAC 286556b8e8e5SAl Viro seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n", 2866e95a1b65SRussell King host->base + DMAC_OFFSET, host->scsi.irq); 28671da177e4SLinus Torvalds #endif 28681da177e4SLinus Torvalds 286956b8e8e5SAl Viro seq_printf(m, "Statistics:\n" 28701da177e4SLinus Torvalds "Queued commands: %-10u Issued commands: %-10u\n" 28711da177e4SLinus Torvalds "Done commands : %-10u Reads : %-10u\n" 28721da177e4SLinus Torvalds "Writes : %-10u Others : %-10u\n" 28731da177e4SLinus Torvalds "Disconnects : %-10u Aborts : %-10u\n" 28741da177e4SLinus Torvalds "Resets : %-10u\n\nLast phases:", 28751da177e4SLinus Torvalds host->stats.queues, host->stats.removes, 28761da177e4SLinus Torvalds host->stats.fins, host->stats.reads, 28771da177e4SLinus Torvalds host->stats.writes, host->stats.miscs, 28781da177e4SLinus Torvalds host->stats.disconnects, host->stats.aborts, 28791da177e4SLinus Torvalds host->stats.resets); 28801da177e4SLinus Torvalds 28811da177e4SLinus Torvalds for (devidx = 0; devidx < 9; devidx ++) { 28821da177e4SLinus Torvalds unsigned int statptr, prev; 28831da177e4SLinus Torvalds 288456b8e8e5SAl Viro seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); 28851da177e4SLinus Torvalds statptr = host->status_ptr[devidx] - 10; 28861da177e4SLinus Torvalds 28871da177e4SLinus Torvalds if ((signed int)statptr < 0) 28881da177e4SLinus Torvalds statptr += STATUS_BUFFER_SIZE; 28891da177e4SLinus Torvalds 28901da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 28911da177e4SLinus Torvalds 28921da177e4SLinus Torvalds for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 28931da177e4SLinus Torvalds if (host->status[devidx][statptr].when) { 289456b8e8e5SAl Viro seq_printf(m, "%c%02X:%02X+%2ld", 28951da177e4SLinus Torvalds host->status[devidx][statptr].irq ? '-' : ' ', 28961da177e4SLinus Torvalds host->status[devidx][statptr].ph, 28971da177e4SLinus Torvalds host->status[devidx][statptr].ssr, 28981da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) < 100 ? 28991da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) : 99); 29001da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 29011da177e4SLinus Torvalds } 29021da177e4SLinus Torvalds } 29031da177e4SLinus Torvalds } 29041da177e4SLinus Torvalds 290556b8e8e5SAl Viro seq_printf(m, "\nAttached devices:\n"); 29061da177e4SLinus Torvalds 29071da177e4SLinus Torvalds shost_for_each_device(scd, instance) { 290856b8e8e5SAl Viro seq_printf(m, "Device/Lun TaggedQ Sync\n"); 290956b8e8e5SAl Viro seq_printf(m, " %d/%d ", scd->id, scd->lun); 29101da177e4SLinus Torvalds if (scd->tagged_supported) 291156b8e8e5SAl Viro seq_printf(m, "%3sabled(%3d) ", 29121da177e4SLinus Torvalds scd->simple_tags ? "en" : "dis", 29131da177e4SLinus Torvalds scd->current_tag); 29141da177e4SLinus Torvalds else 291556b8e8e5SAl Viro seq_printf(m, "unsupported "); 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds if (host->device[scd->id].sync_xfer & 15) 291856b8e8e5SAl Viro seq_printf(m, "offset %d, %d ns\n", 29191da177e4SLinus Torvalds host->device[scd->id].sync_xfer & 15, 29201da177e4SLinus Torvalds acornscsi_getperiod(host->device[scd->id].sync_xfer)); 29211da177e4SLinus Torvalds else 292256b8e8e5SAl Viro seq_printf(m, "async\n"); 29231da177e4SLinus Torvalds 29241da177e4SLinus Torvalds } 292556b8e8e5SAl Viro return 0; 29261da177e4SLinus Torvalds } 29271da177e4SLinus Torvalds 2928d0be4a7dSChristoph Hellwig static struct scsi_host_template acornscsi_template = { 29291da177e4SLinus Torvalds .module = THIS_MODULE, 293056b8e8e5SAl Viro .show_info = acornscsi_show_info, 29311da177e4SLinus Torvalds .name = "AcornSCSI", 29321da177e4SLinus Torvalds .info = acornscsi_info, 29331da177e4SLinus Torvalds .queuecommand = acornscsi_queuecmd, 2934324b9337SRussell King .eh_abort_handler = acornscsi_abort, 2935324b9337SRussell King .eh_bus_reset_handler = acornscsi_bus_reset, 29361da177e4SLinus Torvalds .can_queue = 16, 29371da177e4SLinus Torvalds .this_id = 7, 29381da177e4SLinus Torvalds .sg_tablesize = SG_ALL, 29391da177e4SLinus Torvalds .cmd_per_lun = 2, 29401da177e4SLinus Torvalds .use_clustering = DISABLE_CLUSTERING, 29411da177e4SLinus Torvalds .proc_name = "acornscsi", 29421da177e4SLinus Torvalds }; 29431da177e4SLinus Torvalds 29446f039790SGreg Kroah-Hartman static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 29451da177e4SLinus Torvalds { 29461da177e4SLinus Torvalds struct Scsi_Host *host; 29471da177e4SLinus Torvalds AS_Host *ashost; 2948e95a1b65SRussell King int ret; 2949e95a1b65SRussell King 2950e95a1b65SRussell King ret = ecard_request_resources(ec); 2951e95a1b65SRussell King if (ret) 2952e95a1b65SRussell King goto out; 29531da177e4SLinus Torvalds 29541da177e4SLinus Torvalds host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); 2955e95a1b65SRussell King if (!host) { 2956e95a1b65SRussell King ret = -ENOMEM; 2957e95a1b65SRussell King goto out_release; 2958e95a1b65SRussell King } 29591da177e4SLinus Torvalds 29601da177e4SLinus Torvalds ashost = (AS_Host *)host->hostdata; 29611da177e4SLinus Torvalds 2962e95a1b65SRussell King ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 2963e95a1b65SRussell King ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 2964e95a1b65SRussell King if (!ashost->base || !ashost->fast) 2965e95a1b65SRussell King goto out_put; 2966e95a1b65SRussell King 29671da177e4SLinus Torvalds host->irq = ec->irq; 29681da177e4SLinus Torvalds ashost->host = host; 29691da177e4SLinus Torvalds ashost->scsi.irq = host->irq; 29701da177e4SLinus Torvalds 2971e95a1b65SRussell King ec->irqaddr = ashost->fast + INT_REG; 29721da177e4SLinus Torvalds ec->irqmask = 0x0a; 29731da177e4SLinus Torvalds 29744909cc2bSMichael Opdenacker ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost); 29751da177e4SLinus Torvalds if (ret) { 29761da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", 29771da177e4SLinus Torvalds host->host_no, ashost->scsi.irq, ret); 2978e95a1b65SRussell King goto out_put; 29791da177e4SLinus Torvalds } 29801da177e4SLinus Torvalds 29811da177e4SLinus Torvalds memset(&ashost->stats, 0, sizeof (ashost->stats)); 29821da177e4SLinus Torvalds queue_initialise(&ashost->queues.issue); 29831da177e4SLinus Torvalds queue_initialise(&ashost->queues.disconnected); 29841da177e4SLinus Torvalds msgqueue_initialise(&ashost->scsi.msgs); 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds acornscsi_resetcard(ashost); 29871da177e4SLinus Torvalds 29881da177e4SLinus Torvalds ret = scsi_add_host(host, &ec->dev); 29891da177e4SLinus Torvalds if (ret) 2990e95a1b65SRussell King goto out_irq; 29911da177e4SLinus Torvalds 29921da177e4SLinus Torvalds scsi_scan_host(host); 29931da177e4SLinus Torvalds goto out; 29941da177e4SLinus Torvalds 2995e95a1b65SRussell King out_irq: 29961da177e4SLinus Torvalds free_irq(host->irq, ashost); 2997e95a1b65SRussell King msgqueue_free(&ashost->scsi.msgs); 2998e95a1b65SRussell King queue_free(&ashost->queues.disconnected); 2999e95a1b65SRussell King queue_free(&ashost->queues.issue); 3000e95a1b65SRussell King out_put: 3001e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 3002e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 30031da177e4SLinus Torvalds scsi_host_put(host); 3004e95a1b65SRussell King out_release: 3005e95a1b65SRussell King ecard_release_resources(ec); 30061da177e4SLinus Torvalds out: 30071da177e4SLinus Torvalds return ret; 30081da177e4SLinus Torvalds } 30091da177e4SLinus Torvalds 30106f039790SGreg Kroah-Hartman static void acornscsi_remove(struct expansion_card *ec) 30111da177e4SLinus Torvalds { 30121da177e4SLinus Torvalds struct Scsi_Host *host = ecard_get_drvdata(ec); 30131da177e4SLinus Torvalds AS_Host *ashost = (AS_Host *)host->hostdata; 30141da177e4SLinus Torvalds 30151da177e4SLinus Torvalds ecard_set_drvdata(ec, NULL); 30161da177e4SLinus Torvalds scsi_remove_host(host); 30171da177e4SLinus Torvalds 30181da177e4SLinus Torvalds /* 30191da177e4SLinus Torvalds * Put card into RESET state 30201da177e4SLinus Torvalds */ 3021e95a1b65SRussell King writeb(0x80, ashost->fast + PAGE_REG); 30221da177e4SLinus Torvalds 30231da177e4SLinus Torvalds free_irq(host->irq, ashost); 30241da177e4SLinus Torvalds 30251da177e4SLinus Torvalds msgqueue_free(&ashost->scsi.msgs); 30261da177e4SLinus Torvalds queue_free(&ashost->queues.disconnected); 30271da177e4SLinus Torvalds queue_free(&ashost->queues.issue); 3028e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 3029e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 30301da177e4SLinus Torvalds scsi_host_put(host); 3031e95a1b65SRussell King ecard_release_resources(ec); 30321da177e4SLinus Torvalds } 30331da177e4SLinus Torvalds 30341da177e4SLinus Torvalds static const struct ecard_id acornscsi_cids[] = { 30351da177e4SLinus Torvalds { MANU_ACORN, PROD_ACORN_SCSI }, 30361da177e4SLinus Torvalds { 0xffff, 0xffff }, 30371da177e4SLinus Torvalds }; 30381da177e4SLinus Torvalds 30391da177e4SLinus Torvalds static struct ecard_driver acornscsi_driver = { 30401da177e4SLinus Torvalds .probe = acornscsi_probe, 30416f039790SGreg Kroah-Hartman .remove = acornscsi_remove, 30421da177e4SLinus Torvalds .id_table = acornscsi_cids, 30431da177e4SLinus Torvalds .drv = { 30441da177e4SLinus Torvalds .name = "acornscsi", 30451da177e4SLinus Torvalds }, 30461da177e4SLinus Torvalds }; 30471da177e4SLinus Torvalds 30481da177e4SLinus Torvalds static int __init acornscsi_init(void) 30491da177e4SLinus Torvalds { 30501da177e4SLinus Torvalds return ecard_register_driver(&acornscsi_driver); 30511da177e4SLinus Torvalds } 30521da177e4SLinus Torvalds 30531da177e4SLinus Torvalds static void __exit acornscsi_exit(void) 30541da177e4SLinus Torvalds { 30551da177e4SLinus Torvalds ecard_remove_driver(&acornscsi_driver); 30561da177e4SLinus Torvalds } 30571da177e4SLinus Torvalds 30581da177e4SLinus Torvalds module_init(acornscsi_init); 30591da177e4SLinus Torvalds module_exit(acornscsi_exit); 30601da177e4SLinus Torvalds 30611da177e4SLinus Torvalds MODULE_AUTHOR("Russell King"); 30621da177e4SLinus Torvalds MODULE_DESCRIPTION("AcornSCSI driver"); 30631da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 3064