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 Synchronous transfer support. 661da177e4SLinus Torvalds * 671da177e4SLinus Torvalds * Tried and tested... 681da177e4SLinus Torvalds * 691da177e4SLinus Torvalds * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) 701da177e4SLinus Torvalds * SDTR_PERIOD - period of REQ signal (min=125, max=1020) 711da177e4SLinus Torvalds * DEFAULT_PERIOD - default REQ period. 721da177e4SLinus Torvalds */ 731da177e4SLinus Torvalds #define SDTR_SIZE 12 741da177e4SLinus Torvalds #define SDTR_PERIOD 125 751da177e4SLinus Torvalds #define DEFAULT_PERIOD 500 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds /* 781da177e4SLinus Torvalds * Debugging information 791da177e4SLinus Torvalds * 801da177e4SLinus Torvalds * DEBUG - bit mask from list above 811da177e4SLinus Torvalds * DEBUG_TARGET - is defined to the target number if you want to debug 821da177e4SLinus Torvalds * a specific target. [only recon/write/dma]. 831da177e4SLinus Torvalds */ 841da177e4SLinus Torvalds #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) 851da177e4SLinus Torvalds /* only allow writing to SCSI device 0 */ 861da177e4SLinus Torvalds #define NO_WRITE 0xFE 871da177e4SLinus Torvalds /*#define DEBUG_TARGET 2*/ 881da177e4SLinus Torvalds /* 891da177e4SLinus Torvalds * Select timeout time (in 10ms units) 901da177e4SLinus Torvalds * 911da177e4SLinus Torvalds * This is the timeout used between the start of selection and the WD33C93 921da177e4SLinus Torvalds * chip deciding that the device isn't responding. 931da177e4SLinus Torvalds */ 941da177e4SLinus Torvalds #define TIMEOUT_TIME 10 951da177e4SLinus Torvalds /* 9625985edcSLucas De Marchi * Define this if you want to have verbose explanation of SCSI 971da177e4SLinus Torvalds * status/messages. 981da177e4SLinus Torvalds */ 991da177e4SLinus Torvalds #undef CONFIG_ACORNSCSI_CONSTANTS 1001da177e4SLinus Torvalds /* 1011da177e4SLinus Torvalds * Define this if you want to use the on board DMAC [don't remove this option] 1021da177e4SLinus Torvalds * If not set, then use PIO mode (not currently supported). 1031da177e4SLinus Torvalds */ 1041da177e4SLinus Torvalds #define USE_DMAC 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds /* 1071da177e4SLinus Torvalds * ==================================================================================== 1081da177e4SLinus Torvalds */ 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds #ifdef DEBUG_TARGET 1111da177e4SLinus Torvalds #define DBG(cmd,xxx...) \ 1121da177e4SLinus Torvalds if (cmd->device->id == DEBUG_TARGET) { \ 1131da177e4SLinus Torvalds xxx; \ 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds #else 1161da177e4SLinus Torvalds #define DBG(cmd,xxx...) xxx 1171da177e4SLinus Torvalds #endif 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds #include <linux/module.h> 1201da177e4SLinus Torvalds #include <linux/kernel.h> 1211da177e4SLinus Torvalds #include <linux/string.h> 1221da177e4SLinus Torvalds #include <linux/signal.h> 1231da177e4SLinus Torvalds #include <linux/errno.h> 1241da177e4SLinus Torvalds #include <linux/proc_fs.h> 1251da177e4SLinus Torvalds #include <linux/ioport.h> 1261da177e4SLinus Torvalds #include <linux/blkdev.h> 1271da177e4SLinus Torvalds #include <linux/delay.h> 1281da177e4SLinus Torvalds #include <linux/interrupt.h> 1291da177e4SLinus Torvalds #include <linux/init.h> 1301da177e4SLinus Torvalds #include <linux/bitops.h> 131a796ef70SRussell King #include <linux/stringify.h> 132e95a1b65SRussell King #include <linux/io.h> 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds #include <asm/ecard.h> 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds #include "../scsi.h" 137db9dff36S #include <scsi/scsi_dbg.h> 1381da177e4SLinus Torvalds #include <scsi/scsi_host.h> 1391abfd370SMatthew Wilcox #include <scsi/scsi_transport_spi.h> 1401da177e4SLinus Torvalds #include "acornscsi.h" 1411da177e4SLinus Torvalds #include "msgqueue.h" 1421da177e4SLinus Torvalds #include "scsi.h" 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds #include <scsi/scsicam.h> 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds #define VER_MAJOR 2 1471da177e4SLinus Torvalds #define VER_MINOR 0 1481da177e4SLinus Torvalds #define VER_PATCH 6 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds #ifndef ABORT_TAG 1511da177e4SLinus Torvalds #define ABORT_TAG 0xd 1521da177e4SLinus Torvalds #else 1531da177e4SLinus Torvalds #error "Yippee! ABORT TAG is now defined! Remove this error!" 1541da177e4SLinus Torvalds #endif 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds #ifdef USE_DMAC 1571da177e4SLinus Torvalds /* 1581da177e4SLinus Torvalds * DMAC setup parameters 1591da177e4SLinus Torvalds */ 1601da177e4SLinus Torvalds #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) 1611da177e4SLinus Torvalds #define INIT_DEVCON1 (DEVCON1_BHLD) 1621da177e4SLinus Torvalds #define DMAC_READ (MODECON_READ) 1631da177e4SLinus Torvalds #define DMAC_WRITE (MODECON_WRITE) 1641da177e4SLinus Torvalds #define INIT_SBICDMA (CTRL_DMABURST) 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds #define scsi_xferred have_data_in 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* 1691da177e4SLinus Torvalds * Size of on-board DMA buffer 1701da177e4SLinus Torvalds */ 1711da177e4SLinus Torvalds #define DMAC_BUFFER_SIZE 65536 1721da177e4SLinus Torvalds #endif 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds #define STATUS_BUFFER_TO_PRINT 24 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds unsigned int sdtr_period = SDTR_PERIOD; 1771da177e4SLinus Torvalds unsigned int sdtr_size = SDTR_SIZE; 1781da177e4SLinus Torvalds 179ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 180ee0ca6baSHenne unsigned int result); 1811da177e4SLinus Torvalds static int acornscsi_reconnect_finish(AS_Host *host); 1821da177e4SLinus Torvalds static void acornscsi_dma_cleanup(AS_Host *host); 1831da177e4SLinus Torvalds static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* ==================================================================================== 1861da177e4SLinus Torvalds * Miscellaneous 1871da177e4SLinus Torvalds */ 1881da177e4SLinus Torvalds 189e95a1b65SRussell King /* Offsets from MEMC base */ 190e95a1b65SRussell King #define SBIC_REGIDX 0x2000 191e95a1b65SRussell King #define SBIC_REGVAL 0x2004 192e95a1b65SRussell King #define DMAC_OFFSET 0x3000 193e95a1b65SRussell King 194e95a1b65SRussell King /* Offsets from FAST IOC base */ 195e95a1b65SRussell King #define INT_REG 0x2000 196e95a1b65SRussell King #define PAGE_REG 0x3000 197e95a1b65SRussell King 198ffd7858dSRussell King static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value) 1991da177e4SLinus Torvalds { 200e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 201e95a1b65SRussell King writeb(value, host->base + SBIC_REGVAL); 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 204ffd7858dSRussell King static inline int sbic_arm_read(AS_Host *host, unsigned int reg) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds if(reg == SBIC_ASR) 207e95a1b65SRussell King return readl(host->base + SBIC_REGIDX) & 255; 208e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 209e95a1b65SRussell King return readl(host->base + SBIC_REGVAL) & 255; 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 212e95a1b65SRussell King #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL) 213e95a1b65SRussell King #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL) 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds #ifdef USE_DMAC 216ffd7858dSRussell King #define dmac_read(host,reg) \ 217e95a1b65SRussell King readb((host)->base + DMAC_OFFSET + ((reg) << 2)) 2181da177e4SLinus Torvalds 219ffd7858dSRussell King #define dmac_write(host,reg,value) \ 220e95a1b65SRussell King ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); }) 2211da177e4SLinus Torvalds 222e95a1b65SRussell King #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG) 2231da177e4SLinus Torvalds 224ffd7858dSRussell King static inline unsigned int dmac_address(AS_Host *host) 2251da177e4SLinus Torvalds { 226ffd7858dSRussell King return dmac_read(host, DMAC_TXADRHI) << 16 | 227ffd7858dSRussell King dmac_read(host, DMAC_TXADRMD) << 8 | 228ffd7858dSRussell King dmac_read(host, DMAC_TXADRLO); 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds static 2321da177e4SLinus Torvalds void acornscsi_dumpdma(AS_Host *host, char *where) 2331da177e4SLinus Torvalds { 2341da177e4SLinus Torvalds unsigned int mode, addr, len; 2351da177e4SLinus Torvalds 236ffd7858dSRussell King mode = dmac_read(host, DMAC_MODECON); 237ffd7858dSRussell King addr = dmac_address(host); 238ffd7858dSRussell King len = dmac_read(host, DMAC_TXCNTHI) << 8 | 239ffd7858dSRussell King dmac_read(host, DMAC_TXCNTLO); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", 2421da177e4SLinus Torvalds host->host->host_no, where, 2431da177e4SLinus Torvalds mode, addr, (len + 1) & 0xffff, 244ffd7858dSRussell King dmac_read(host, DMAC_MASKREG)); 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds printk("DMA @%06x, ", host->dma.start_addr); 2471da177e4SLinus Torvalds printk("BH @%p +%04x, ", host->scsi.SCp.ptr, 2481da177e4SLinus Torvalds host->scsi.SCp.this_residual); 2491da177e4SLinus Torvalds printk("DT @+%04x ST @+%04x", host->dma.transferred, 2501da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred); 2511da177e4SLinus Torvalds printk("\n"); 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds #endif 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds static 2561da177e4SLinus Torvalds unsigned long acornscsi_sbic_xfcount(AS_Host *host) 2571da177e4SLinus Torvalds { 2581da177e4SLinus Torvalds unsigned long length; 2591da177e4SLinus Torvalds 260ffd7858dSRussell King length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16; 261ffd7858dSRussell King length |= sbic_arm_readnext(host) << 8; 262ffd7858dSRussell King length |= sbic_arm_readnext(host); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds return length; 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds static int 2681da177e4SLinus Torvalds acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) 2691da177e4SLinus Torvalds { 2701da177e4SLinus Torvalds int asr; 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds do { 273ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds if ((asr & stat_mask) == stat) 2761da177e4SLinus Torvalds return 0; 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds udelay(1); 2791da177e4SLinus Torvalds } while (--timeout); 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds printk("scsi%d: timeout while %s\n", host->host->host_no, msg); 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds return -1; 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds static 2871da177e4SLinus Torvalds int acornscsi_sbic_issuecmd(AS_Host *host, int command) 2881da177e4SLinus Torvalds { 2891da177e4SLinus Torvalds if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) 2901da177e4SLinus Torvalds return -1; 2911da177e4SLinus Torvalds 292ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, command); 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds return 0; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds static void 2981da177e4SLinus Torvalds acornscsi_csdelay(unsigned int cs) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds unsigned long target_jiffies, flags; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds target_jiffies = jiffies + 1 + cs * HZ / 100; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds local_save_flags(flags); 3051da177e4SLinus Torvalds local_irq_enable(); 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds while (time_before(jiffies, target_jiffies)) barrier(); 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds local_irq_restore(flags); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds static 3131da177e4SLinus Torvalds void acornscsi_resetcard(AS_Host *host) 3141da177e4SLinus Torvalds { 3151da177e4SLinus Torvalds unsigned int i, timeout; 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds /* assert reset line */ 3181da177e4SLinus Torvalds host->card.page_reg = 0x80; 319e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds /* wait 3 cs. SCSI standard says 25ms. */ 3221da177e4SLinus Torvalds acornscsi_csdelay(3); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds host->card.page_reg = 0; 325e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds /* 3281da177e4SLinus Torvalds * Should get a reset from the card 3291da177e4SLinus Torvalds */ 3301da177e4SLinus Torvalds timeout = 1000; 3311da177e4SLinus Torvalds do { 332e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3331da177e4SLinus Torvalds break; 3341da177e4SLinus Torvalds udelay(1); 3351da177e4SLinus Torvalds } while (--timeout); 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds if (timeout == 0) 3381da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3391da177e4SLinus Torvalds host->host->host_no); 3401da177e4SLinus Torvalds 341ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 342ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 345ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 346ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds /* 3491da177e4SLinus Torvalds * Command should cause a reset interrupt 3501da177e4SLinus Torvalds */ 3511da177e4SLinus Torvalds timeout = 1000; 3521da177e4SLinus Torvalds do { 353e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3541da177e4SLinus Torvalds break; 3551da177e4SLinus Torvalds udelay(1); 3561da177e4SLinus Torvalds } while (--timeout); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds if (timeout == 0) 3591da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3601da177e4SLinus Torvalds host->host->host_no); 3611da177e4SLinus Torvalds 362ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 363ffd7858dSRussell King if (sbic_arm_read(host, SBIC_SSR) != 0x01) 3641da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", 3651da177e4SLinus Torvalds host->host->host_no); 3661da177e4SLinus Torvalds 367ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 368ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 369ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 370ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds host->card.page_reg = 0x40; 373e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds /* setup dmac - uPC71071 */ 376ffd7858dSRussell King dmac_write(host, DMAC_INIT, 0); 3771da177e4SLinus Torvalds #ifdef USE_DMAC 378ffd7858dSRussell King dmac_write(host, DMAC_INIT, INIT_8BIT); 379ffd7858dSRussell King dmac_write(host, DMAC_CHANNEL, CHANNEL_0); 380ffd7858dSRussell King dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0); 381ffd7858dSRussell King dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1); 3821da177e4SLinus Torvalds #endif 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds host->SCpnt = NULL; 3851da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 3861da177e4SLinus Torvalds host->scsi.disconnectable = 0; 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds memset(host->busyluns, 0, sizeof(host->busyluns)); 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds for (i = 0; i < 8; i++) { 3911da177e4SLinus Torvalds host->device[i].sync_state = SYNC_NEGOCIATE; 3921da177e4SLinus Torvalds host->device[i].disconnect_ok = 1; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds /* wait 25 cs. SCSI standard says 250ms. */ 3961da177e4SLinus Torvalds acornscsi_csdelay(25); 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds /*============================================================================================= 4001da177e4SLinus Torvalds * Utility routines (eg. debug) 4011da177e4SLinus Torvalds */ 4021da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4031da177e4SLinus Torvalds static char *acornscsi_interrupttype[] = { 4041da177e4SLinus Torvalds "rst", "suc", "p/a", "3", 4051da177e4SLinus Torvalds "term", "5", "6", "7", 4061da177e4SLinus Torvalds "serv", "9", "a", "b", 4071da177e4SLinus Torvalds "c", "d", "e", "f" 4081da177e4SLinus Torvalds }; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds static signed char acornscsi_map[] = { 4111da177e4SLinus Torvalds 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4121da177e4SLinus Torvalds -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4131da177e4SLinus Torvalds 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4141da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4151da177e4SLinus Torvalds 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, 4161da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4171da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4181da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4191da177e4SLinus Torvalds 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4201da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4211da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4221da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4231da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4241da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4251da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4261da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 4271da177e4SLinus Torvalds }; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds static char *acornscsi_interruptcode[] = { 4301da177e4SLinus Torvalds /* 0 */ 4311da177e4SLinus Torvalds "reset - normal mode", /* 00 */ 4321da177e4SLinus Torvalds "reset - advanced mode", /* 01 */ 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds /* 2 */ 4351da177e4SLinus Torvalds "sel", /* 11 */ 4361da177e4SLinus Torvalds "sel+xfer", /* 16 */ 4371da177e4SLinus Torvalds "data-out", /* 18 */ 4381da177e4SLinus Torvalds "data-in", /* 19 */ 4391da177e4SLinus Torvalds "cmd", /* 1A */ 4401da177e4SLinus Torvalds "stat", /* 1B */ 4411da177e4SLinus Torvalds "??-out", /* 1C */ 4421da177e4SLinus Torvalds "??-in", /* 1D */ 4431da177e4SLinus Torvalds "msg-out", /* 1E */ 4441da177e4SLinus Torvalds "msg-in", /* 1F */ 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds /* 12 */ 4471da177e4SLinus Torvalds "/ACK asserted", /* 20 */ 4481da177e4SLinus Torvalds "save-data-ptr", /* 21 */ 4491da177e4SLinus Torvalds "{re}sel", /* 22 */ 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds /* 15 */ 4521da177e4SLinus Torvalds "inv cmd", /* 40 */ 4531da177e4SLinus Torvalds "unexpected disconnect", /* 41 */ 4541da177e4SLinus Torvalds "sel timeout", /* 42 */ 4551da177e4SLinus Torvalds "P err", /* 43 */ 4561da177e4SLinus Torvalds "P err+ATN", /* 44 */ 4571da177e4SLinus Torvalds "bad status byte", /* 47 */ 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds /* 21 */ 4601da177e4SLinus Torvalds "resel, no id", /* 80 */ 4611da177e4SLinus Torvalds "resel", /* 81 */ 4621da177e4SLinus Torvalds "discon", /* 85 */ 4631da177e4SLinus Torvalds }; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds static 4661da177e4SLinus Torvalds void print_scsi_status(unsigned int ssr) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds if (acornscsi_map[ssr] != -1) 4691da177e4SLinus Torvalds printk("%s:%s", 4701da177e4SLinus Torvalds acornscsi_interrupttype[(ssr >> 4)], 4711da177e4SLinus Torvalds acornscsi_interruptcode[acornscsi_map[ssr]]); 4721da177e4SLinus Torvalds else 4731da177e4SLinus Torvalds printk("%X:%X", ssr >> 4, ssr & 0x0f); 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds #endif 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds static 4781da177e4SLinus Torvalds void print_sbic_status(int asr, int ssr, int cmdphase) 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4811da177e4SLinus Torvalds printk("sbic: %c%c%c%c%c%c ", 4821da177e4SLinus Torvalds asr & ASR_INT ? 'I' : 'i', 4831da177e4SLinus Torvalds asr & ASR_LCI ? 'L' : 'l', 4841da177e4SLinus Torvalds asr & ASR_BSY ? 'B' : 'b', 4851da177e4SLinus Torvalds asr & ASR_CIP ? 'C' : 'c', 4861da177e4SLinus Torvalds asr & ASR_PE ? 'P' : 'p', 4871da177e4SLinus Torvalds asr & ASR_DBR ? 'D' : 'd'); 4881da177e4SLinus Torvalds printk("scsi: "); 4891da177e4SLinus Torvalds print_scsi_status(ssr); 4901da177e4SLinus Torvalds printk(" ph %02X\n", cmdphase); 4911da177e4SLinus Torvalds #else 4921da177e4SLinus Torvalds printk("sbic: %02X scsi: %X:%X ph: %02X\n", 4931da177e4SLinus Torvalds asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); 4941da177e4SLinus Torvalds #endif 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds static void 4981da177e4SLinus Torvalds acornscsi_dumplogline(AS_Host *host, int target, int line) 4991da177e4SLinus Torvalds { 5001da177e4SLinus Torvalds unsigned long prev; 5011da177e4SLinus Torvalds signed int ptr; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; 5041da177e4SLinus Torvalds if (ptr < 0) 5051da177e4SLinus Torvalds ptr += STATUS_BUFFER_SIZE; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds printk("%c: %3s:", target == 8 ? 'H' : '0' + target, 5081da177e4SLinus Torvalds line == 0 ? "ph" : line == 1 ? "ssr" : "int"); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 5131da177e4SLinus Torvalds unsigned long time_diff; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds if (!host->status[target][ptr].when) 5161da177e4SLinus Torvalds continue; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds switch (line) { 5191da177e4SLinus Torvalds case 0: 5201da177e4SLinus Torvalds printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', 5211da177e4SLinus Torvalds host->status[target][ptr].ph); 5221da177e4SLinus Torvalds break; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds case 1: 5251da177e4SLinus Torvalds printk(" %02X", host->status[target][ptr].ssr); 5261da177e4SLinus Torvalds break; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds case 2: 5291da177e4SLinus Torvalds time_diff = host->status[target][ptr].when - prev; 5301da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5311da177e4SLinus Torvalds if (time_diff == 0) 5321da177e4SLinus Torvalds printk("==^"); 5331da177e4SLinus Torvalds else if (time_diff >= 100) 5341da177e4SLinus Torvalds printk(" "); 5351da177e4SLinus Torvalds else 5361da177e4SLinus Torvalds printk(" %02ld", time_diff); 5371da177e4SLinus Torvalds break; 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds printk("\n"); 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds static 5451da177e4SLinus Torvalds void acornscsi_dumplog(AS_Host *host, int target) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds do { 5481da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 0); 5491da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 1); 5501da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 2); 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds if (target == 8) 5531da177e4SLinus Torvalds break; 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds target = 8; 5561da177e4SLinus Torvalds } while (1); 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds static 5601da177e4SLinus Torvalds char acornscsi_target(AS_Host *host) 5611da177e4SLinus Torvalds { 5621da177e4SLinus Torvalds if (host->SCpnt) 5631da177e4SLinus Torvalds return '0' + host->SCpnt->device->id; 5641da177e4SLinus Torvalds return 'H'; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds /* 5681da177e4SLinus Torvalds * Prototype: cmdtype_t acornscsi_cmdtype(int command) 5691da177e4SLinus Torvalds * Purpose : differentiate READ from WRITE from other commands 5701da177e4SLinus Torvalds * Params : command - command to interpret 5711da177e4SLinus Torvalds * Returns : CMD_READ - command reads data, 5721da177e4SLinus Torvalds * CMD_WRITE - command writes data, 5731da177e4SLinus Torvalds * CMD_MISC - everything else 5741da177e4SLinus Torvalds */ 5751da177e4SLinus Torvalds static inline 5761da177e4SLinus Torvalds cmdtype_t acornscsi_cmdtype(int command) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds switch (command) { 5791da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_12: 5801da177e4SLinus Torvalds return CMD_WRITE; 5811da177e4SLinus Torvalds case READ_6: case READ_10: case READ_12: 5821da177e4SLinus Torvalds return CMD_READ; 5831da177e4SLinus Torvalds default: 5841da177e4SLinus Torvalds return CMD_MISC; 5851da177e4SLinus Torvalds } 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds /* 5891da177e4SLinus Torvalds * Prototype: int acornscsi_datadirection(int command) 5901da177e4SLinus Torvalds * Purpose : differentiate between commands that have a DATA IN phase 5911da177e4SLinus Torvalds * and a DATA OUT phase 5921da177e4SLinus Torvalds * Params : command - command to interpret 5931da177e4SLinus Torvalds * Returns : DATADIR_OUT - data out phase expected 5941da177e4SLinus Torvalds * DATADIR_IN - data in phase expected 5951da177e4SLinus Torvalds */ 5961da177e4SLinus Torvalds static 5971da177e4SLinus Torvalds datadir_t acornscsi_datadirection(int command) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds switch (command) { 6001da177e4SLinus Torvalds case CHANGE_DEFINITION: case COMPARE: case COPY: 6011da177e4SLinus Torvalds case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: 6021da177e4SLinus Torvalds case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: 6031da177e4SLinus Torvalds case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: 6041da177e4SLinus Torvalds case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: 6051da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_VERIFY: 6061da177e4SLinus Torvalds case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: 6071da177e4SLinus Torvalds case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: 6081da177e4SLinus Torvalds case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: 6091da177e4SLinus Torvalds case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: 6101da177e4SLinus Torvalds return DATADIR_OUT; 6111da177e4SLinus Torvalds default: 6121da177e4SLinus Torvalds return DATADIR_IN; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds /* 6171da177e4SLinus Torvalds * Purpose : provide values for synchronous transfers with 33C93. 6181da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6191da177e4SLinus Torvalds * Modified by Russell King for 8MHz WD33C93A 6201da177e4SLinus Torvalds */ 6211da177e4SLinus Torvalds static struct sync_xfer_tbl { 6221da177e4SLinus Torvalds unsigned int period_ns; 6231da177e4SLinus Torvalds unsigned char reg_value; 6241da177e4SLinus Torvalds } sync_xfer_table[] = { 6251da177e4SLinus Torvalds { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, 6261da177e4SLinus Torvalds { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, 6271da177e4SLinus Torvalds { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } 6281da177e4SLinus Torvalds }; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* 6311da177e4SLinus Torvalds * Prototype: int acornscsi_getperiod(unsigned char syncxfer) 6321da177e4SLinus Torvalds * Purpose : period for the synchronous transfer setting 6331da177e4SLinus Torvalds * Params : syncxfer SYNCXFER register value 6341da177e4SLinus Torvalds * Returns : period in ns. 6351da177e4SLinus Torvalds */ 6361da177e4SLinus Torvalds static 6371da177e4SLinus Torvalds int acornscsi_getperiod(unsigned char syncxfer) 6381da177e4SLinus Torvalds { 6391da177e4SLinus Torvalds int i; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds syncxfer &= 0xf0; 6421da177e4SLinus Torvalds if (syncxfer == 0x10) 6431da177e4SLinus Torvalds syncxfer = 0; 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) 6461da177e4SLinus Torvalds if (syncxfer == sync_xfer_table[i].reg_value) 6471da177e4SLinus Torvalds return sync_xfer_table[i].period_ns; 6481da177e4SLinus Torvalds return 0; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds /* 6521da177e4SLinus Torvalds * Prototype: int round_period(unsigned int period) 6531da177e4SLinus Torvalds * Purpose : return index into above table for a required REQ period 6541da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6551da177e4SLinus Torvalds * Returns : table index 6561da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6571da177e4SLinus Torvalds */ 6581da177e4SLinus Torvalds static inline 6591da177e4SLinus Torvalds int round_period(unsigned int period) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds int i; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) { 6641da177e4SLinus Torvalds if ((period <= sync_xfer_table[i].period_ns) && 6651da177e4SLinus Torvalds (period > sync_xfer_table[i - 1].period_ns)) 6661da177e4SLinus Torvalds return i; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds return 7; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds /* 6721da177e4SLinus Torvalds * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 6731da177e4SLinus Torvalds * Purpose : calculate value for 33c93s SYNC register 6741da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6751da177e4SLinus Torvalds * offset - offset in bytes between REQ/ACK 6761da177e4SLinus Torvalds * Returns : value for SYNC register 6771da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6781da177e4SLinus Torvalds */ 6791da177e4SLinus Torvalds static 6801da177e4SLinus Torvalds unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds return sync_xfer_table[round_period(period)].reg_value | 6831da177e4SLinus Torvalds ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds /* ==================================================================================== 6871da177e4SLinus Torvalds * Command functions 6881da177e4SLinus Torvalds */ 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * Function: acornscsi_kick(AS_Host *host) 6911da177e4SLinus Torvalds * Purpose : kick next command to interface 6921da177e4SLinus Torvalds * Params : host - host to send command to 6931da177e4SLinus Torvalds * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING 6941da177e4SLinus Torvalds * Notes : interrupts are always disabled! 6951da177e4SLinus Torvalds */ 6961da177e4SLinus Torvalds static 6971da177e4SLinus Torvalds intr_ret_t acornscsi_kick(AS_Host *host) 6981da177e4SLinus Torvalds { 6991da177e4SLinus Torvalds int from_queue = 0; 700ee0ca6baSHenne struct scsi_cmnd *SCpnt; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds /* first check to see if a command is waiting to be executed */ 7031da177e4SLinus Torvalds SCpnt = host->origSCpnt; 7041da177e4SLinus Torvalds host->origSCpnt = NULL; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds /* retrieve next command */ 7071da177e4SLinus Torvalds if (!SCpnt) { 7081da177e4SLinus Torvalds SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); 7091da177e4SLinus Torvalds if (!SCpnt) 7101da177e4SLinus Torvalds return INTR_IDLE; 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds from_queue = 1; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 7161da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 7171da177e4SLinus Torvalds host->scsi.disconnectable = 0; 7181da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 7191da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", 7201da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 7211da177e4SLinus Torvalds #endif 7221da177e4SLinus Torvalds host->SCpnt = NULL; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds /* 7261da177e4SLinus Torvalds * If we have an interrupt pending, then we may have been reselected. 7271da177e4SLinus Torvalds * In this case, we don't want to write to the registers 7281da177e4SLinus Torvalds */ 729ffd7858dSRussell King if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { 730ffd7858dSRussell King sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id); 731ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN); 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds /* 7351da177e4SLinus Torvalds * claim host busy - all of these must happen atomically wrt 7361da177e4SLinus Torvalds * our interrupt routine. Failure means command loss. 7371da177e4SLinus Torvalds */ 7381da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTING; 7391da177e4SLinus Torvalds host->SCpnt = SCpnt; 7401da177e4SLinus Torvalds host->scsi.SCp = SCpnt->SCp; 7411da177e4SLinus Torvalds host->dma.xfer_setup = 0; 7421da177e4SLinus Torvalds host->dma.xfer_required = 0; 7431da177e4SLinus Torvalds host->dma.xfer_done = 0; 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) 7461da177e4SLinus Torvalds DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", 7471da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id, 7481da177e4SLinus Torvalds SCpnt->cmnd[0])); 7491da177e4SLinus Torvalds #endif 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds if (from_queue) { 7521da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 7531da177e4SLinus Torvalds /* 7541da177e4SLinus Torvalds * tagged queueing - allocate a new tag to this command 7551da177e4SLinus Torvalds */ 7561da177e4SLinus Torvalds if (SCpnt->device->simple_tags) { 7571da177e4SLinus Torvalds SCpnt->device->current_tag += 1; 7581da177e4SLinus Torvalds if (SCpnt->device->current_tag == 0) 7591da177e4SLinus Torvalds SCpnt->device->current_tag = 1; 7601da177e4SLinus Torvalds SCpnt->tag = SCpnt->device->current_tag; 7611da177e4SLinus Torvalds } else 7621da177e4SLinus Torvalds #endif 7639cb78c16SHannes Reinecke set_bit(SCpnt->device->id * 8 + 7649cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x07), host->busyluns); 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds host->stats.removes += 1; 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { 7691da177e4SLinus Torvalds case CMD_WRITE: 7701da177e4SLinus Torvalds host->stats.writes += 1; 7711da177e4SLinus Torvalds break; 7721da177e4SLinus Torvalds case CMD_READ: 7731da177e4SLinus Torvalds host->stats.reads += 1; 7741da177e4SLinus Torvalds break; 7751da177e4SLinus Torvalds case CMD_MISC: 7761da177e4SLinus Torvalds host->stats.miscs += 1; 7771da177e4SLinus Torvalds break; 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds return INTR_PROCESSING; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds /* 785ee0ca6baSHenne * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result) 7861da177e4SLinus Torvalds * Purpose : complete processing for command 7871da177e4SLinus Torvalds * Params : host - interface that completed 7881da177e4SLinus Torvalds * result - driver byte of result 7891da177e4SLinus Torvalds */ 790ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 791ee0ca6baSHenne unsigned int result) 7921da177e4SLinus Torvalds { 793ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp; 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds /* clean up */ 796ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds host->stats.fins += 1; 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds if (SCpnt) { 8011da177e4SLinus Torvalds *SCpntp = NULL; 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds /* 8081da177e4SLinus Torvalds * In theory, this should not happen. In practice, it seems to. 8091da177e4SLinus Torvalds * Only trigger an error if the device attempts to report all happy 8101da177e4SLinus Torvalds * but with untransferred buffers... If we don't do something, then 8111da177e4SLinus Torvalds * data loss will occur. Should we check SCpnt->underflow here? 8121da177e4SLinus Torvalds * It doesn't appear to be set to something meaningful by the higher 8131da177e4SLinus Torvalds * levels all the time. 8141da177e4SLinus Torvalds */ 8151da177e4SLinus Torvalds if (result == DID_OK) { 8161da177e4SLinus Torvalds int xfer_warn = 0; 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds if (SCpnt->underflow == 0) { 8191da177e4SLinus Torvalds if (host->scsi.SCp.ptr && 8201da177e4SLinus Torvalds acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) 8211da177e4SLinus Torvalds xfer_warn = 1; 8221da177e4SLinus Torvalds } else { 8231da177e4SLinus Torvalds if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || 8241da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred != host->dma.transferred) 8251da177e4SLinus Torvalds xfer_warn = 1; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) 8291da177e4SLinus Torvalds * Targets which break data transfers into multiple 8301da177e4SLinus Torvalds * connections shall end each successful connection 8311da177e4SLinus Torvalds * (except possibly the last) with a SAVE DATA 8321da177e4SLinus Torvalds * POINTER - DISCONNECT message sequence. 8331da177e4SLinus Torvalds * 8341da177e4SLinus Torvalds * This makes it difficult to ensure that a transfer has 8351da177e4SLinus Torvalds * completed. If we reach the end of a transfer during 8361da177e4SLinus Torvalds * the command, then we can only have finished the transfer. 8371da177e4SLinus Torvalds * therefore, if we seem to have some data remaining, this 8381da177e4SLinus Torvalds * is not a problem. 8391da177e4SLinus Torvalds */ 8401da177e4SLinus Torvalds if (host->dma.xfer_done) 8411da177e4SLinus Torvalds xfer_warn = 0; 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds if (xfer_warn) { 8441da177e4SLinus Torvalds switch (status_byte(SCpnt->result)) { 8451da177e4SLinus Torvalds case CHECK_CONDITION: 8461da177e4SLinus Torvalds case COMMAND_TERMINATED: 8471da177e4SLinus Torvalds case BUSY: 8481da177e4SLinus Torvalds case QUEUE_FULL: 8491da177e4SLinus Torvalds case RESERVATION_CONFLICT: 8501da177e4SLinus Torvalds break; 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds default: 8531da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=", 8541da177e4SLinus Torvalds host->host->host_no, SCpnt->result); 855db9dff36S __scsi_print_command(SCpnt->cmnd); 8561da177e4SLinus Torvalds acornscsi_dumpdma(host, "done"); 8571da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 8581da177e4SLinus Torvalds SCpnt->result &= 0xffff; 8591da177e4SLinus Torvalds SCpnt->result |= DID_ERROR << 16; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds if (!SCpnt->scsi_done) 8651da177e4SLinus Torvalds panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); 8661da177e4SLinus Torvalds 8679cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 + 8689cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns); 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 8711da177e4SLinus Torvalds } else 8721da177e4SLinus Torvalds printk("scsi%d: null command in acornscsi_done", host->host->host_no); 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds /* ==================================================================================== 8781da177e4SLinus Torvalds * DMA routines 8791da177e4SLinus Torvalds */ 8801da177e4SLinus Torvalds /* 8811da177e4SLinus Torvalds * Purpose : update SCSI Data Pointer 8821da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 8831da177e4SLinus Torvalds */ 8841da177e4SLinus Torvalds static 8850a04137eSChristoph Hellwig void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length) 8861da177e4SLinus Torvalds { 8871da177e4SLinus Torvalds SCp->ptr += length; 8881da177e4SLinus Torvalds SCp->this_residual -= length; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds if (SCp->this_residual == 0 && next_SCp(SCp) == 0) 8911da177e4SLinus Torvalds host->dma.xfer_done = 1; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds /* 8951da177e4SLinus Torvalds * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, 8961da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 8971da177e4SLinus Torvalds * Purpose : read data from DMA RAM 8981da177e4SLinus Torvalds * Params : host - host to transfer from 8991da177e4SLinus Torvalds * ptr - DRAM address 9001da177e4SLinus Torvalds * start_addr - host mem address 9011da177e4SLinus Torvalds * length - number of bytes to transfer 9021da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9031da177e4SLinus Torvalds */ 9041da177e4SLinus Torvalds static 9051da177e4SLinus Torvalds void acornscsi_data_read(AS_Host *host, char *ptr, 9061da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9071da177e4SLinus Torvalds { 908e95a1b65SRussell King extern void __acornscsi_in(void __iomem *, char *buf, int len); 9091da177e4SLinus Torvalds unsigned int page, offset, len = length; 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds page = (start_addr >> 12); 9121da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9131da177e4SLinus Torvalds 914e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds while (len > 0) { 9171da177e4SLinus Torvalds unsigned int this_len; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9201da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9211da177e4SLinus Torvalds else 9221da177e4SLinus Torvalds this_len = len; 9231da177e4SLinus Torvalds 924e95a1b65SRussell King __acornscsi_in(host->base + (offset << 1), ptr, this_len); 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds offset += this_len; 9271da177e4SLinus Torvalds ptr += this_len; 9281da177e4SLinus Torvalds len -= this_len; 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds if (offset == (1 << 12)) { 9311da177e4SLinus Torvalds offset = 0; 9321da177e4SLinus Torvalds page ++; 933e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds } 936e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds /* 9401da177e4SLinus Torvalds * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, 9411da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 9421da177e4SLinus Torvalds * Purpose : write data to DMA RAM 9431da177e4SLinus Torvalds * Params : host - host to transfer from 9441da177e4SLinus Torvalds * ptr - DRAM address 9451da177e4SLinus Torvalds * start_addr - host mem address 9461da177e4SLinus Torvalds * length - number of bytes to transfer 9471da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9481da177e4SLinus Torvalds */ 9491da177e4SLinus Torvalds static 9501da177e4SLinus Torvalds void acornscsi_data_write(AS_Host *host, char *ptr, 9511da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9521da177e4SLinus Torvalds { 953e95a1b65SRussell King extern void __acornscsi_out(void __iomem *, char *buf, int len); 9541da177e4SLinus Torvalds unsigned int page, offset, len = length; 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds page = (start_addr >> 12); 9571da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9581da177e4SLinus Torvalds 959e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds while (len > 0) { 9621da177e4SLinus Torvalds unsigned int this_len; 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9651da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9661da177e4SLinus Torvalds else 9671da177e4SLinus Torvalds this_len = len; 9681da177e4SLinus Torvalds 969e95a1b65SRussell King __acornscsi_out(host->base + (offset << 1), ptr, this_len); 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds offset += this_len; 9721da177e4SLinus Torvalds ptr += this_len; 9731da177e4SLinus Torvalds len -= this_len; 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds if (offset == (1 << 12)) { 9761da177e4SLinus Torvalds offset = 0; 9771da177e4SLinus Torvalds page ++; 978e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds } 981e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds /* ========================================================================================= 9851da177e4SLinus Torvalds * On-board DMA routines 9861da177e4SLinus Torvalds */ 9871da177e4SLinus Torvalds #ifdef USE_DMAC 9881da177e4SLinus Torvalds /* 9891da177e4SLinus Torvalds * Prototype: void acornscsi_dmastop(AS_Host *host) 9901da177e4SLinus Torvalds * Purpose : stop all DMA 9911da177e4SLinus Torvalds * Params : host - host on which to stop DMA 9921da177e4SLinus Torvalds * Notes : This is called when leaving DATA IN/OUT phase, 9931da177e4SLinus Torvalds * or when interface is RESET 9941da177e4SLinus Torvalds */ 9951da177e4SLinus Torvalds static inline 9961da177e4SLinus Torvalds void acornscsi_dma_stop(AS_Host *host) 9971da177e4SLinus Torvalds { 998ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 999ffd7858dSRussell King dmac_clearintr(host); 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10021da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); 10031da177e4SLinus Torvalds #endif 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds /* 10071da177e4SLinus Torvalds * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10081da177e4SLinus Torvalds * Purpose : setup DMA controller for data transfer 10091da177e4SLinus Torvalds * Params : host - host to setup 10101da177e4SLinus Torvalds * direction - data transfer direction 10111da177e4SLinus Torvalds * Notes : This is called when entering DATA I/O phase, not 10121da177e4SLinus Torvalds * while we're in a DATA I/O phase 10131da177e4SLinus Torvalds */ 10141da177e4SLinus Torvalds static 10151da177e4SLinus Torvalds void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10161da177e4SLinus Torvalds { 10171da177e4SLinus Torvalds unsigned int address, length, mode; 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds host->dma.direction = direction; 10201da177e4SLinus Torvalds 1021ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds if (direction == DMA_OUT) { 10241da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 10251da177e4SLinus Torvalds if (NO_WRITE & (1 << host->SCpnt->device->id)) { 10261da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", 10271da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 10281da177e4SLinus Torvalds return; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds #endif 10311da177e4SLinus Torvalds mode = DMAC_WRITE; 10321da177e4SLinus Torvalds } else 10331da177e4SLinus Torvalds mode = DMAC_READ; 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds /* 10361da177e4SLinus Torvalds * Allocate some buffer space, limited to half the buffer size 10371da177e4SLinus Torvalds */ 10381da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 10391da177e4SLinus Torvalds if (length) { 10401da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 10411da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 10421da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds /* 10451da177e4SLinus Torvalds * Transfer data to DMA memory 10461da177e4SLinus Torvalds */ 10471da177e4SLinus Torvalds if (direction == DMA_OUT) 10481da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 10491da177e4SLinus Torvalds length); 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds length -= 1; 1052ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1053ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1054ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1055ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1056ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1057ffd7858dSRussell King dmac_write(host, DMAC_MODECON, mode); 1058ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10611da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); 10621da177e4SLinus Torvalds #endif 10631da177e4SLinus Torvalds host->dma.xfer_setup = 1; 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds /* 10681da177e4SLinus Torvalds * Function: void acornscsi_dma_cleanup(AS_Host *host) 10691da177e4SLinus Torvalds * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct 10701da177e4SLinus Torvalds * Params : host - host to finish 10711da177e4SLinus Torvalds * Notes : This is called when a command is: 10721da177e4SLinus Torvalds * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT 10731da177e4SLinus Torvalds * : This must not return until all transfers are completed. 10741da177e4SLinus Torvalds */ 10751da177e4SLinus Torvalds static 10761da177e4SLinus Torvalds void acornscsi_dma_cleanup(AS_Host *host) 10771da177e4SLinus Torvalds { 1078ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1079ffd7858dSRussell King dmac_clearintr(host); 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds /* 10821da177e4SLinus Torvalds * Check for a pending transfer 10831da177e4SLinus Torvalds */ 10841da177e4SLinus Torvalds if (host->dma.xfer_required) { 10851da177e4SLinus Torvalds host->dma.xfer_required = 0; 10861da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 10871da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 10881da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds /* 10921da177e4SLinus Torvalds * Has a transfer been setup? 10931da177e4SLinus Torvalds */ 10941da177e4SLinus Torvalds if (host->dma.xfer_setup) { 10951da177e4SLinus Torvalds unsigned int transferred; 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds host->dma.xfer_setup = 0; 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11001da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); 11011da177e4SLinus Torvalds #endif 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds /* 11041da177e4SLinus Torvalds * Calculate number of bytes transferred from DMA. 11051da177e4SLinus Torvalds */ 1106ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11071da177e4SLinus Torvalds host->dma.transferred += transferred; 11081da177e4SLinus Torvalds 11091da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 11101da177e4SLinus Torvalds acornscsi_data_read(host, host->scsi.SCp.ptr, 11111da177e4SLinus Torvalds host->dma.start_addr, transferred); 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds /* 11141da177e4SLinus Torvalds * Update SCSI pointers 11151da177e4SLinus Torvalds */ 11161da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11171da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11181da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); 11191da177e4SLinus Torvalds #endif 11201da177e4SLinus Torvalds } 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds /* 11241da177e4SLinus Torvalds * Function: void acornscsi_dmacintr(AS_Host *host) 11251da177e4SLinus Torvalds * Purpose : handle interrupts from DMAC device 11261da177e4SLinus Torvalds * Params : host - host to process 11271da177e4SLinus Torvalds * Notes : If reading, we schedule the read to main memory & 11281da177e4SLinus Torvalds * allow the transfer to continue. 11291da177e4SLinus Torvalds * : If writing, we fill the onboard DMA memory from main 11301da177e4SLinus Torvalds * memory. 11311da177e4SLinus Torvalds * : Called whenever DMAC finished it's current transfer. 11321da177e4SLinus Torvalds */ 11331da177e4SLinus Torvalds static 11341da177e4SLinus Torvalds void acornscsi_dma_intr(AS_Host *host) 11351da177e4SLinus Torvalds { 11361da177e4SLinus Torvalds unsigned int address, length, transferred; 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11391da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); 11401da177e4SLinus Torvalds #endif 11411da177e4SLinus Torvalds 1142ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1143ffd7858dSRussell King dmac_clearintr(host); 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds /* 11461da177e4SLinus Torvalds * Calculate amount transferred via DMA 11471da177e4SLinus Torvalds */ 1148ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11491da177e4SLinus Torvalds host->dma.transferred += transferred; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds /* 11521da177e4SLinus Torvalds * Schedule DMA transfer off board 11531da177e4SLinus Torvalds */ 11541da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) { 11551da177e4SLinus Torvalds host->dma.xfer_start = host->dma.start_addr; 11561da177e4SLinus Torvalds host->dma.xfer_length = transferred; 11571da177e4SLinus Torvalds host->dma.xfer_ptr = host->scsi.SCp.ptr; 11581da177e4SLinus Torvalds host->dma.xfer_required = 1; 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds /* 11641da177e4SLinus Torvalds * Allocate some buffer space, limited to half the on-board RAM size 11651da177e4SLinus Torvalds */ 11661da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 11671da177e4SLinus Torvalds if (length) { 11681da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 11691da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 11701da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds /* 11731da177e4SLinus Torvalds * Transfer data to DMA memory 11741da177e4SLinus Torvalds */ 11751da177e4SLinus Torvalds if (host->dma.direction == DMA_OUT) 11761da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 11771da177e4SLinus Torvalds length); 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds length -= 1; 1180ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1181ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1182ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1183ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1184ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1185ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11881da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); 11891da177e4SLinus Torvalds #endif 11901da177e4SLinus Torvalds } else { 11911da177e4SLinus Torvalds host->dma.xfer_setup = 0; 11921da177e4SLinus Torvalds #if 0 11931da177e4SLinus Torvalds /* 11941da177e4SLinus Torvalds * If the interface still wants more, then this is an error. 11951da177e4SLinus Torvalds * We give it another byte, but we also attempt to raise an 11961da177e4SLinus Torvalds * attention condition. We continue giving one byte until 11971da177e4SLinus Torvalds * the device recognises the attention. 11981da177e4SLinus Torvalds */ 1199ffd7858dSRussell King if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) { 12001da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 12011da177e4SLinus Torvalds 1202ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, 0); 1203ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, 0); 1204ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, 0); 1205ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, 0); 1206ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1207ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds #endif 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 12131da177e4SLinus Torvalds /* 12141da177e4SLinus Torvalds * Function: void acornscsi_dma_xfer(AS_Host *host) 12151da177e4SLinus Torvalds * Purpose : transfer data between AcornSCSI and memory 12161da177e4SLinus Torvalds * Params : host - host to process 12171da177e4SLinus Torvalds */ 12181da177e4SLinus Torvalds static 12191da177e4SLinus Torvalds void acornscsi_dma_xfer(AS_Host *host) 12201da177e4SLinus Torvalds { 12211da177e4SLinus Torvalds host->dma.xfer_required = 0; 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 12241da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 12251da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 12261da177e4SLinus Torvalds } 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds /* 12291da177e4SLinus Torvalds * Function: void acornscsi_dma_adjust(AS_Host *host) 12301da177e4SLinus Torvalds * Purpose : adjust DMA pointers & count for bytes transferred to 12311da177e4SLinus Torvalds * SBIC but not SCSI bus. 12321da177e4SLinus Torvalds * Params : host - host to adjust DMA count for 12331da177e4SLinus Torvalds */ 12341da177e4SLinus Torvalds static 12351da177e4SLinus Torvalds void acornscsi_dma_adjust(AS_Host *host) 12361da177e4SLinus Torvalds { 12371da177e4SLinus Torvalds if (host->dma.xfer_setup) { 12381da177e4SLinus Torvalds signed long transferred; 12391da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12401da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); 12411da177e4SLinus Torvalds #endif 12421da177e4SLinus Torvalds /* 12431da177e4SLinus Torvalds * Calculate correct DMA address - DMA is ahead of SCSI bus while 12441da177e4SLinus Torvalds * writing. 12451da177e4SLinus Torvalds * host->scsi.SCp.scsi_xferred is the number of bytes 12461da177e4SLinus Torvalds * actually transferred to/from the SCSI bus. 12471da177e4SLinus Torvalds * host->dma.transferred is the number of bytes transferred 12481da177e4SLinus Torvalds * over DMA since host->dma.start_addr was last set. 12491da177e4SLinus Torvalds * 12501da177e4SLinus Torvalds * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred 12511da177e4SLinus Torvalds * - host->dma.transferred 12521da177e4SLinus Torvalds */ 12531da177e4SLinus Torvalds transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; 12541da177e4SLinus Torvalds if (transferred < 0) 12551da177e4SLinus Torvalds printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", 12561da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), transferred); 12571da177e4SLinus Torvalds else if (transferred == 0) 12581da177e4SLinus Torvalds host->dma.xfer_setup = 0; 12591da177e4SLinus Torvalds else { 12601da177e4SLinus Torvalds transferred += host->dma.start_addr; 1261ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, transferred); 1262ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, transferred >> 8); 1263ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, transferred >> 16); 12641da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12651da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); 12661da177e4SLinus Torvalds #endif 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds #endif 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds /* ========================================================================================= 12731da177e4SLinus Torvalds * Data I/O 12741da177e4SLinus Torvalds */ 12751da177e4SLinus Torvalds static int 12761da177e4SLinus Torvalds acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) 12771da177e4SLinus Torvalds { 12781da177e4SLinus Torvalds unsigned int asr, timeout = max_timeout; 12791da177e4SLinus Torvalds int my_ptr = *ptr; 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds while (my_ptr < len) { 1282ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds if (asr & ASR_DBR) { 12851da177e4SLinus Torvalds timeout = max_timeout; 12861da177e4SLinus Torvalds 1287ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]); 12881da177e4SLinus Torvalds } else if (asr & ASR_INT) 12891da177e4SLinus Torvalds break; 12901da177e4SLinus Torvalds else if (--timeout == 0) 12911da177e4SLinus Torvalds break; 12921da177e4SLinus Torvalds udelay(1); 12931da177e4SLinus Torvalds } 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds *ptr = my_ptr; 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds return (timeout == 0) ? -1 : 0; 12981da177e4SLinus Torvalds } 12991da177e4SLinus Torvalds 13001da177e4SLinus Torvalds /* 13011da177e4SLinus Torvalds * Function: void acornscsi_sendcommand(AS_Host *host) 13021da177e4SLinus Torvalds * Purpose : send a command to a target 13031da177e4SLinus Torvalds * Params : host - host which is connected to target 13041da177e4SLinus Torvalds */ 13051da177e4SLinus Torvalds static void 13061da177e4SLinus Torvalds acornscsi_sendcommand(AS_Host *host) 13071da177e4SLinus Torvalds { 1308ee0ca6baSHenne struct scsi_cmnd *SCpnt = host->SCpnt; 13091da177e4SLinus Torvalds 1310ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1311ffd7858dSRussell King sbic_arm_writenext(host, 0); 1312ffd7858dSRussell King sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command); 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13151da177e4SLinus Torvalds 13161da177e4SLinus Torvalds if (acornscsi_write_pio(host, SCpnt->cmnd, 13171da177e4SLinus Torvalds (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) 13181da177e4SLinus Torvalds printk("scsi%d: timeout while sending command\n", host->host->host_no); 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds host->scsi.phase = PHASE_COMMAND; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds static 13241da177e4SLinus Torvalds void acornscsi_sendmessage(AS_Host *host) 13251da177e4SLinus Torvalds { 13261da177e4SLinus Torvalds unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); 13271da177e4SLinus Torvalds unsigned int msgnr; 13281da177e4SLinus Torvalds struct message *msg; 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13311da177e4SLinus Torvalds printk("scsi%d.%c: sending message ", 13321da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 13331da177e4SLinus Torvalds #endif 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds switch (message_length) { 13361da177e4SLinus Torvalds case 0: 13371da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); 13401da177e4SLinus Torvalds 1341ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, NOP); 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds host->scsi.last_message = NOP; 13441da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13451da177e4SLinus Torvalds printk("NOP"); 13461da177e4SLinus Torvalds #endif 13471da177e4SLinus Torvalds break; 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds case 1: 13501da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13511da177e4SLinus Torvalds msg = msgqueue_getmsg(&host->scsi.msgs, 0); 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); 13541da177e4SLinus Torvalds 1355ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, msg->msg[0]); 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13581da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13591abfd370SMatthew Wilcox spi_print_msg(msg->msg); 13601da177e4SLinus Torvalds #endif 13611da177e4SLinus Torvalds break; 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds default: 13641da177e4SLinus Torvalds /* 13651da177e4SLinus Torvalds * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) 13661da177e4SLinus Torvalds * 'When a target sends this (MESSAGE_REJECT) message, it 13671da177e4SLinus Torvalds * shall change to MESSAGE IN phase and send this message 13681da177e4SLinus Torvalds * prior to requesting additional message bytes from the 13691da177e4SLinus Torvalds * initiator. This provides an interlock so that the 13701da177e4SLinus Torvalds * initiator can determine which message byte is rejected. 13711da177e4SLinus Torvalds */ 1372ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1373ffd7858dSRussell King sbic_arm_writenext(host, 0); 1374ffd7858dSRussell King sbic_arm_writenext(host, message_length); 13751da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds msgnr = 0; 13781da177e4SLinus Torvalds while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { 13791da177e4SLinus Torvalds unsigned int i; 13801da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13811abfd370SMatthew Wilcox spi_print_msg(msg); 13821da177e4SLinus Torvalds #endif 13831da177e4SLinus Torvalds i = 0; 13841da177e4SLinus Torvalds if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) 13851da177e4SLinus Torvalds printk("scsi%d: timeout while sending message\n", host->host->host_no); 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13881da177e4SLinus Torvalds if (msg->msg[0] == EXTENDED_MESSAGE) 13891da177e4SLinus Torvalds host->scsi.last_message |= msg->msg[2] << 8; 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds if (i != msg->length) 13921da177e4SLinus Torvalds break; 13931da177e4SLinus Torvalds } 13941da177e4SLinus Torvalds break; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13971da177e4SLinus Torvalds printk("\n"); 13981da177e4SLinus Torvalds #endif 13991da177e4SLinus Torvalds } 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds /* 14021da177e4SLinus Torvalds * Function: void acornscsi_readstatusbyte(AS_Host *host) 14031da177e4SLinus Torvalds * Purpose : Read status byte from connected target 14041da177e4SLinus Torvalds * Params : host - host connected to target 14051da177e4SLinus Torvalds */ 14061da177e4SLinus Torvalds static 14071da177e4SLinus Torvalds void acornscsi_readstatusbyte(AS_Host *host) 14081da177e4SLinus Torvalds { 14091da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); 14101da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); 1411ffd7858dSRussell King host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA); 14121da177e4SLinus Torvalds } 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds /* 14151da177e4SLinus Torvalds * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) 14161da177e4SLinus Torvalds * Purpose : Read one message byte from connected target 14171da177e4SLinus Torvalds * Params : host - host connected to target 14181da177e4SLinus Torvalds */ 14191da177e4SLinus Torvalds static 14201da177e4SLinus Torvalds unsigned char acornscsi_readmessagebyte(AS_Host *host) 14211da177e4SLinus Torvalds { 14221da177e4SLinus Torvalds unsigned char message; 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); 14271da177e4SLinus Torvalds 1428ffd7858dSRussell King message = sbic_arm_read(host, SBIC_DATA); 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds /* wait for MSGIN-XFER-PAUSED */ 14311da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); 14321da177e4SLinus Torvalds 1433ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds return message; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds /* 14391da177e4SLinus Torvalds * Function: void acornscsi_message(AS_Host *host) 14401da177e4SLinus Torvalds * Purpose : Read complete message from connected target & action message 14411da177e4SLinus Torvalds * Params : host - host connected to target 14421da177e4SLinus Torvalds */ 14431da177e4SLinus Torvalds static 14441da177e4SLinus Torvalds void acornscsi_message(AS_Host *host) 14451da177e4SLinus Torvalds { 14461da177e4SLinus Torvalds unsigned char message[16]; 14471da177e4SLinus Torvalds unsigned int msgidx = 0, msglen = 1; 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds do { 14501da177e4SLinus Torvalds message[msgidx] = acornscsi_readmessagebyte(host); 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds switch (msgidx) { 14531da177e4SLinus Torvalds case 0: 14541da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE || 14551da177e4SLinus Torvalds (message[0] >= 0x20 && message[0] <= 0x2f)) 14561da177e4SLinus Torvalds msglen = 2; 14571da177e4SLinus Torvalds break; 14581da177e4SLinus Torvalds 14591da177e4SLinus Torvalds case 1: 14601da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE) 14611da177e4SLinus Torvalds msglen += message[msgidx]; 14621da177e4SLinus Torvalds break; 14631da177e4SLinus Torvalds } 14641da177e4SLinus Torvalds msgidx += 1; 14651da177e4SLinus Torvalds if (msgidx < msglen) { 14661da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 14671da177e4SLinus Torvalds 14681da177e4SLinus Torvalds /* wait for next msg-in */ 14691da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack"); 1470ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds } while (msgidx < msglen); 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 14751da177e4SLinus Torvalds printk("scsi%d.%c: message in: ", 14761da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 14771abfd370SMatthew Wilcox spi_print_msg(message); 14781da177e4SLinus Torvalds printk("\n"); 14791da177e4SLinus Torvalds #endif 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds if (host->scsi.phase == PHASE_RECONNECTED) { 14821da177e4SLinus Torvalds /* 14831da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 14841da177e4SLinus Torvalds * 'Whenever a target reconnects to an initiator to continue 14851da177e4SLinus Torvalds * a tagged I/O process, the SIMPLE QUEUE TAG message shall 14861da177e4SLinus Torvalds * be sent immediately following the IDENTIFY message...' 14871da177e4SLinus Torvalds */ 14881da177e4SLinus Torvalds if (message[0] == SIMPLE_QUEUE_TAG) 14891da177e4SLinus Torvalds host->scsi.reconnected.tag = message[1]; 14901da177e4SLinus Torvalds if (acornscsi_reconnect_finish(host)) 14911da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 14921da177e4SLinus Torvalds } 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds switch (message[0]) { 14951da177e4SLinus Torvalds case ABORT: 14961da177e4SLinus Torvalds case ABORT_TAG: 14971da177e4SLinus Torvalds case COMMAND_COMPLETE: 14981da177e4SLinus Torvalds if (host->scsi.phase != PHASE_STATUSIN) { 14991da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", 15001da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15011da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt->device->id); 15021da177e4SLinus Torvalds } 15031da177e4SLinus Torvalds host->scsi.phase = PHASE_DONE; 15041da177e4SLinus Torvalds host->scsi.SCp.Message = message[0]; 15051da177e4SLinus Torvalds break; 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds case SAVE_POINTERS: 15081da177e4SLinus Torvalds /* 15091da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) 15101da177e4SLinus Torvalds * 'The SAVE DATA POINTER message is sent from a target to 15111da177e4SLinus Torvalds * direct the initiator to copy the active data pointer to 15121da177e4SLinus Torvalds * the saved data pointer for the current I/O process. 15131da177e4SLinus Torvalds */ 15141da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15151da177e4SLinus Torvalds host->SCpnt->SCp = host->scsi.SCp; 15161da177e4SLinus Torvalds host->SCpnt->SCp.sent_command = 0; 15171da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15181da177e4SLinus Torvalds break; 15191da177e4SLinus Torvalds 15201da177e4SLinus Torvalds case RESTORE_POINTERS: 15211da177e4SLinus Torvalds /* 15221da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) 15231da177e4SLinus Torvalds * 'The RESTORE POINTERS message is sent from a target to 15241da177e4SLinus Torvalds * direct the initiator to copy the most recently saved 15251da177e4SLinus Torvalds * command, data, and status pointers for the I/O process 15261da177e4SLinus Torvalds * to the corresponding active pointers. The command and 15271da177e4SLinus Torvalds * status pointers shall be restored to the beginning of 15281da177e4SLinus Torvalds * the present command and status areas.' 15291da177e4SLinus Torvalds */ 15301da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15311da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 15321da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15331da177e4SLinus Torvalds break; 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds case DISCONNECT: 15361da177e4SLinus Torvalds /* 15371da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) 15381da177e4SLinus Torvalds * 'On those occasions when an error or exception condition occurs 15391da177e4SLinus Torvalds * and the target elects to repeat the information transfer, the 15401da177e4SLinus Torvalds * target may repeat the transfer either issuing a RESTORE POINTERS 15411da177e4SLinus Torvalds * message or by disconnecting without issuing a SAVE POINTERS 15421da177e4SLinus Torvalds * message. When reconnection is completed, the most recent 15431da177e4SLinus Torvalds * saved pointer values are restored.' 15441da177e4SLinus Torvalds */ 15451da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15461da177e4SLinus Torvalds host->scsi.phase = PHASE_DISCONNECT; 15471da177e4SLinus Torvalds break; 15481da177e4SLinus Torvalds 15491da177e4SLinus Torvalds case MESSAGE_REJECT: 15501da177e4SLinus Torvalds #if 0 /* this isn't needed any more */ 15511da177e4SLinus Torvalds /* 15521da177e4SLinus Torvalds * If we were negociating sync transfer, we don't yet know if 15531da177e4SLinus Torvalds * this REJECT is for the sync transfer or for the tagged queue/wide 155425985edcSLucas De Marchi * transfer. Re-initiate sync transfer negotiation now, and if 15551da177e4SLinus Torvalds * we got a REJECT in response to SDTR, then it'll be set to DONE. 15561da177e4SLinus Torvalds */ 15571da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) 15581da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; 15591da177e4SLinus Torvalds #endif 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds /* 15621da177e4SLinus Torvalds * If we have any messages waiting to go out, then assert ATN now 15631da177e4SLinus Torvalds */ 15641da177e4SLinus Torvalds if (msgqueue_msglength(&host->scsi.msgs)) 15651da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds switch (host->scsi.last_message) { 15681da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 15691da177e4SLinus Torvalds case HEAD_OF_QUEUE_TAG: 15701da177e4SLinus Torvalds case ORDERED_QUEUE_TAG: 15711da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 15721da177e4SLinus Torvalds /* 15731da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 15741da177e4SLinus Torvalds * If a target does not implement tagged queuing and a queue tag 15751da177e4SLinus Torvalds * message is received, it shall respond with a MESSAGE REJECT 15761da177e4SLinus Torvalds * message and accept the I/O process as if it were untagged. 15771da177e4SLinus Torvalds */ 15781da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", 15791da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15801da177e4SLinus Torvalds host->SCpnt->device->simple_tags = 0; 15819cb78c16SHannes Reinecke set_bit(host->SCpnt->device->id * 8 + 15829cb78c16SHannes Reinecke (u8)(host->SCpnt->device->lun & 0x7), host->busyluns); 15831da177e4SLinus Torvalds break; 15841da177e4SLinus Torvalds #endif 15851da177e4SLinus Torvalds case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): 15861da177e4SLinus Torvalds /* 15871da177e4SLinus Torvalds * Target can't handle synchronous transfers 15881da177e4SLinus Torvalds */ 15891da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", 15901da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15911da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; 15921da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; 1593ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 15941da177e4SLinus Torvalds break; 15951da177e4SLinus Torvalds 15961da177e4SLinus Torvalds default: 15971da177e4SLinus Torvalds break; 15981da177e4SLinus Torvalds } 15991da177e4SLinus Torvalds break; 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds case QUEUE_FULL: 16021da177e4SLinus Torvalds /* TODO: target queue is full */ 16031da177e4SLinus Torvalds break; 16041da177e4SLinus Torvalds 16051da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 16061da177e4SLinus Torvalds /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ 16071da177e4SLinus Torvalds printk("scsi%d.%c: reconnect queue tag %02X\n", 16081da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16091da177e4SLinus Torvalds message[1]); 16101da177e4SLinus Torvalds break; 16111da177e4SLinus Torvalds 16121da177e4SLinus Torvalds case EXTENDED_MESSAGE: 16131da177e4SLinus Torvalds switch (message[2]) { 16141da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 16151da177e4SLinus Torvalds case EXTENDED_SDTR: 16161da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { 16171da177e4SLinus Torvalds /* 16181da177e4SLinus Torvalds * We requested synchronous transfers. This isn't quite right... 16191da177e4SLinus Torvalds * We can only say if this succeeded if we proceed on to execute the 16201da177e4SLinus Torvalds * command from this message. If we get a MESSAGE PARITY ERROR, 16211da177e4SLinus Torvalds * and the target retries fail, then we fallback to asynchronous mode 16221da177e4SLinus Torvalds */ 16231da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; 16241da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", 16251da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16261da177e4SLinus Torvalds message[4], message[3] * 4); 16271da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16281da177e4SLinus Torvalds calc_sync_xfer(message[3] * 4, message[4]); 16291da177e4SLinus Torvalds } else { 16301da177e4SLinus Torvalds unsigned char period, length; 16311da177e4SLinus Torvalds /* 16321da177e4SLinus Torvalds * Target requested synchronous transfers. The agreement is only 16331da177e4SLinus Torvalds * to be in operation AFTER the target leaves message out phase. 16341da177e4SLinus Torvalds */ 16351da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16361da177e4SLinus Torvalds period = max_t(unsigned int, message[3], sdtr_period / 4); 16371da177e4SLinus Torvalds length = min_t(unsigned int, message[4], sdtr_size); 16381da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, 16391da177e4SLinus Torvalds EXTENDED_SDTR, period, length); 16401da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16411da177e4SLinus Torvalds calc_sync_xfer(period * 4, length); 16421da177e4SLinus Torvalds } 1643ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 16441da177e4SLinus Torvalds break; 16451da177e4SLinus Torvalds #else 16461da177e4SLinus Torvalds /* We do not accept synchronous transfers. Respond with a 16471da177e4SLinus Torvalds * MESSAGE_REJECT. 16481da177e4SLinus Torvalds */ 16491da177e4SLinus Torvalds #endif 16501da177e4SLinus Torvalds 16511da177e4SLinus Torvalds case EXTENDED_WDTR: 16521da177e4SLinus Torvalds /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT 16531da177e4SLinus Torvalds * to a wide data transfer request. 16541da177e4SLinus Torvalds */ 16551da177e4SLinus Torvalds default: 16561da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16571da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 16581da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 16591da177e4SLinus Torvalds break; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds break; 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds default: /* reject message */ 16641da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", 16651da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16661da177e4SLinus Torvalds message[0]); 16671da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16681da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 16691da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 16701da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 16711da177e4SLinus Torvalds break; 16721da177e4SLinus Torvalds } 16731da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 16741da177e4SLinus Torvalds } 16751da177e4SLinus Torvalds 16761da177e4SLinus Torvalds /* 16771da177e4SLinus Torvalds * Function: int acornscsi_buildmessages(AS_Host *host) 16781da177e4SLinus Torvalds * Purpose : build the connection messages for a host 16791da177e4SLinus Torvalds * Params : host - host to add messages to 16801da177e4SLinus Torvalds */ 16811da177e4SLinus Torvalds static 16821da177e4SLinus Torvalds void acornscsi_buildmessages(AS_Host *host) 16831da177e4SLinus Torvalds { 16841da177e4SLinus Torvalds #if 0 16851da177e4SLinus Torvalds /* does the device need resetting? */ 16861da177e4SLinus Torvalds if (cmd_reset) { 16871da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); 16881da177e4SLinus Torvalds return; 16891da177e4SLinus Torvalds } 16901da177e4SLinus Torvalds #endif 16911da177e4SLinus Torvalds 16921da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, 16931da177e4SLinus Torvalds IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, 16941da177e4SLinus Torvalds host->SCpnt->device->lun)); 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds #if 0 16971da177e4SLinus Torvalds /* does the device need the current command aborted */ 16981da177e4SLinus Torvalds if (cmd_aborted) { 16991da177e4SLinus Torvalds acornscsi_abortcmd(host->SCpnt->tag); 17001da177e4SLinus Torvalds return; 17011da177e4SLinus Torvalds } 17021da177e4SLinus Torvalds #endif 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 17051da177e4SLinus Torvalds if (host->SCpnt->tag) { 17061da177e4SLinus Torvalds unsigned int tag_type; 17071da177e4SLinus Torvalds 17081da177e4SLinus Torvalds if (host->SCpnt->cmnd[0] == REQUEST_SENSE || 17091da177e4SLinus Torvalds host->SCpnt->cmnd[0] == TEST_UNIT_READY || 17101da177e4SLinus Torvalds host->SCpnt->cmnd[0] == INQUIRY) 17111da177e4SLinus Torvalds tag_type = HEAD_OF_QUEUE_TAG; 17121da177e4SLinus Torvalds else 17131da177e4SLinus Torvalds tag_type = SIMPLE_QUEUE_TAG; 17141da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); 17151da177e4SLinus Torvalds } 17161da177e4SLinus Torvalds #endif 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 17191da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { 17201da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; 17211da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, 17221da177e4SLinus Torvalds EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 17231da177e4SLinus Torvalds sdtr_period / 4, sdtr_size); 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds #endif 17261da177e4SLinus Torvalds } 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds /* 17291da177e4SLinus Torvalds * Function: int acornscsi_starttransfer(AS_Host *host) 17301da177e4SLinus Torvalds * Purpose : transfer data to/from connected target 17311da177e4SLinus Torvalds * Params : host - host to which target is connected 17321da177e4SLinus Torvalds * Returns : 0 if failure 17331da177e4SLinus Torvalds */ 17341da177e4SLinus Torvalds static 17351da177e4SLinus Torvalds int acornscsi_starttransfer(AS_Host *host) 17361da177e4SLinus Torvalds { 17371da177e4SLinus Torvalds int residual; 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { 17401da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", 17411da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 17421da177e4SLinus Torvalds return 0; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds 174584ac86caSBoaz Harrosh residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; 17461da177e4SLinus Torvalds 1747ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1748ffd7858dSRussell King sbic_arm_writenext(host, residual >> 16); 1749ffd7858dSRussell King sbic_arm_writenext(host, residual >> 8); 1750ffd7858dSRussell King sbic_arm_writenext(host, residual); 17511da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 17521da177e4SLinus Torvalds return 1; 17531da177e4SLinus Torvalds } 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds /* ========================================================================================= 17561da177e4SLinus Torvalds * Connection & Disconnection 17571da177e4SLinus Torvalds */ 17581da177e4SLinus Torvalds /* 17591da177e4SLinus Torvalds * Function : acornscsi_reconnect(AS_Host *host) 17601da177e4SLinus Torvalds * Purpose : reconnect a previously disconnected command 17611da177e4SLinus Torvalds * Params : host - host specific data 17621da177e4SLinus Torvalds * Remarks : SCSI spec says: 17631da177e4SLinus Torvalds * 'The set of active pointers is restored from the set 17641da177e4SLinus Torvalds * of saved pointers upon reconnection of the I/O process' 17651da177e4SLinus Torvalds */ 17661da177e4SLinus Torvalds static 17671da177e4SLinus Torvalds int acornscsi_reconnect(AS_Host *host) 17681da177e4SLinus Torvalds { 17691da177e4SLinus Torvalds unsigned int target, lun, ok = 0; 17701da177e4SLinus Torvalds 1771ffd7858dSRussell King target = sbic_arm_read(host, SBIC_SOURCEID); 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds if (!(target & 8)) 17741da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: invalid source id after reselection " 17751da177e4SLinus Torvalds "- device fault?\n", 17761da177e4SLinus Torvalds host->host->host_no); 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds target &= 7; 17791da177e4SLinus Torvalds 17801da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) { 17811da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%d: reconnected while command in " 17821da177e4SLinus Torvalds "progress to target %d?\n", 17831da177e4SLinus Torvalds host->host->host_no, target, host->SCpnt->device->id); 17841da177e4SLinus Torvalds host->SCpnt = NULL; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds 1787ffd7858dSRussell King lun = sbic_arm_read(host, SBIC_DATA) & 7; 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds host->scsi.reconnected.target = target; 17901da177e4SLinus Torvalds host->scsi.reconnected.lun = lun; 17911da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 17921da177e4SLinus Torvalds 17931da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt && 17941da177e4SLinus Torvalds host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) 17951da177e4SLinus Torvalds ok = 1; 17961da177e4SLinus Torvalds 17971da177e4SLinus Torvalds if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) 17981da177e4SLinus Torvalds ok = 1; 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds ADD_STATUS(target, 0x81, host->scsi.phase, 0); 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds if (ok) { 18031da177e4SLinus Torvalds host->scsi.phase = PHASE_RECONNECTED; 18041da177e4SLinus Torvalds } else { 18051da177e4SLinus Torvalds /* this doesn't seem to work */ 18061da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: reselected with no command " 18071da177e4SLinus Torvalds "to reconnect with\n", 18081da177e4SLinus Torvalds host->host->host_no, '0' + target); 18091da177e4SLinus Torvalds acornscsi_dumplog(host, target); 18101da177e4SLinus Torvalds acornscsi_abortcmd(host, 0); 18111da177e4SLinus Torvalds if (host->SCpnt) { 18121da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18131da177e4SLinus Torvalds host->SCpnt = NULL; 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds } 18161da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 18171da177e4SLinus Torvalds return !ok; 18181da177e4SLinus Torvalds } 18191da177e4SLinus Torvalds 18201da177e4SLinus Torvalds /* 18211da177e4SLinus Torvalds * Function: int acornscsi_reconect_finish(AS_Host *host) 18221da177e4SLinus Torvalds * Purpose : finish reconnecting a command 18231da177e4SLinus Torvalds * Params : host - host to complete 18241da177e4SLinus Torvalds * Returns : 0 if failed 18251da177e4SLinus Torvalds */ 18261da177e4SLinus Torvalds static 18271da177e4SLinus Torvalds int acornscsi_reconnect_finish(AS_Host *host) 18281da177e4SLinus Torvalds { 18291da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 18301da177e4SLinus Torvalds host->scsi.disconnectable = 0; 18311da177e4SLinus Torvalds if (host->SCpnt->device->id == host->scsi.reconnected.target && 18321da177e4SLinus Torvalds host->SCpnt->device->lun == host->scsi.reconnected.lun && 18331da177e4SLinus Torvalds host->SCpnt->tag == host->scsi.reconnected.tag) { 18341da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18351da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: reconnected", 18361da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18371da177e4SLinus Torvalds #endif 18381da177e4SLinus Torvalds } else { 18391da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18401da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18411da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to move command " 18421da177e4SLinus Torvalds "to disconnected queue\n", 18431da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18441da177e4SLinus Torvalds #endif 18451da177e4SLinus Torvalds host->SCpnt = NULL; 18461da177e4SLinus Torvalds } 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds if (!host->SCpnt) { 18491da177e4SLinus Torvalds host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, 18501da177e4SLinus Torvalds host->scsi.reconnected.target, 18511da177e4SLinus Torvalds host->scsi.reconnected.lun, 18521da177e4SLinus Torvalds host->scsi.reconnected.tag); 18531da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18541da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to get command", 18551da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18561da177e4SLinus Torvalds #endif 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds 18591da177e4SLinus Torvalds if (!host->SCpnt) 18601da177e4SLinus Torvalds acornscsi_abortcmd(host, host->scsi.reconnected.tag); 18611da177e4SLinus Torvalds else { 18621da177e4SLinus Torvalds /* 18631da177e4SLinus Torvalds * Restore data pointer from SAVED pointers. 18641da177e4SLinus Torvalds */ 18651da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 18661da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18671da177e4SLinus Torvalds printk(", data pointers: [%p, %X]", 18681da177e4SLinus Torvalds host->scsi.SCp.ptr, host->scsi.SCp.this_residual); 18691da177e4SLinus Torvalds #endif 18701da177e4SLinus Torvalds } 18711da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18721da177e4SLinus Torvalds printk("\n"); 18731da177e4SLinus Torvalds #endif 18741da177e4SLinus Torvalds 18751da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 18761da177e4SLinus Torvalds 18771da177e4SLinus Torvalds return host->SCpnt != NULL; 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds /* 18811da177e4SLinus Torvalds * Function: void acornscsi_disconnect_unexpected(AS_Host *host) 18821da177e4SLinus Torvalds * Purpose : handle an unexpected disconnect 18831da177e4SLinus Torvalds * Params : host - host on which disconnect occurred 18841da177e4SLinus Torvalds */ 18851da177e4SLinus Torvalds static 18861da177e4SLinus Torvalds void acornscsi_disconnect_unexpected(AS_Host *host) 18871da177e4SLinus Torvalds { 18881da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", 18891da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 18901da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 18911da177e4SLinus Torvalds acornscsi_dumplog(host, 8); 18921da177e4SLinus Torvalds #endif 18931da177e4SLinus Torvalds 18941da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 18951da177e4SLinus Torvalds } 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds /* 18981da177e4SLinus Torvalds * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) 18991da177e4SLinus Torvalds * Purpose : abort a currently executing command 19001da177e4SLinus Torvalds * Params : host - host with connected command to abort 19011da177e4SLinus Torvalds * tag - tag to abort 19021da177e4SLinus Torvalds */ 19031da177e4SLinus Torvalds static 19041da177e4SLinus Torvalds void acornscsi_abortcmd(AS_Host *host, unsigned char tag) 19051da177e4SLinus Torvalds { 19061da177e4SLinus Torvalds host->scsi.phase = PHASE_ABORTED; 1907ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN); 19081da177e4SLinus Torvalds 19091da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19101da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 19111da177e4SLinus Torvalds if (tag) 19121da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); 19131da177e4SLinus Torvalds else 19141da177e4SLinus Torvalds #endif 19151da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds 19181da177e4SLinus Torvalds /* ========================================================================================== 19191da177e4SLinus Torvalds * Interrupt routines. 19201da177e4SLinus Torvalds */ 19211da177e4SLinus Torvalds /* 19221da177e4SLinus Torvalds * Function: int acornscsi_sbicintr(AS_Host *host) 19231da177e4SLinus Torvalds * Purpose : handle interrupts from SCSI device 19241da177e4SLinus Torvalds * Params : host - host to process 19251da177e4SLinus Torvalds * Returns : INTR_PROCESS if expecting another SBIC interrupt 19261da177e4SLinus Torvalds * INTR_IDLE if no interrupt 19271da177e4SLinus Torvalds * INTR_NEXT_COMMAND if we have finished processing the command 19281da177e4SLinus Torvalds */ 19291da177e4SLinus Torvalds static 19301da177e4SLinus Torvalds intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) 19311da177e4SLinus Torvalds { 19321da177e4SLinus Torvalds unsigned int asr, ssr; 19331da177e4SLinus Torvalds 1934ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 19351da177e4SLinus Torvalds if (!(asr & ASR_INT)) 19361da177e4SLinus Torvalds return INTR_IDLE; 19371da177e4SLinus Torvalds 1938ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 19391da177e4SLinus Torvalds 19401da177e4SLinus Torvalds #if (DEBUG & DEBUG_PHASES) 19411da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 19421da177e4SLinus Torvalds #endif 19431da177e4SLinus Torvalds 19441da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, in_irq); 19451da177e4SLinus Torvalds 19461da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) 19471da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 19481da177e4SLinus Torvalds 19491da177e4SLinus Torvalds switch (ssr) { 19501da177e4SLinus Torvalds case 0x00: /* reset state - not advanced */ 19511da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", 19521da177e4SLinus Torvalds host->host->host_no); 19531da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 1954ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 1955ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 19561da177e4SLinus Torvalds return INTR_IDLE; 19571da177e4SLinus Torvalds 19581da177e4SLinus Torvalds case 0x01: /* reset state - advanced */ 1959ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 1960ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 1961ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 1962ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 19631da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19641da177e4SLinus Torvalds return INTR_IDLE; 19651da177e4SLinus Torvalds 19661da177e4SLinus Torvalds case 0x41: /* unexpected disconnect aborted command */ 19671da177e4SLinus Torvalds acornscsi_disconnect_unexpected(host); 19681da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds switch (host->scsi.phase) { 19721da177e4SLinus Torvalds case PHASE_CONNECTING: /* STATE: command removed from issue queue */ 19731da177e4SLinus Torvalds switch (ssr) { 19741da177e4SLinus Torvalds case 0x11: /* -> PHASE_CONNECTED */ 19751da177e4SLinus Torvalds /* BUS FREE -> SELECTION */ 19761da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTED; 19771da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19781da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 19791da177e4SLinus Torvalds /* 33C93 gives next interrupt indicating bus phase */ 1980ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 19811da177e4SLinus Torvalds if (!(asr & ASR_INT)) 19821da177e4SLinus Torvalds break; 1983ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 19841da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, 1); 19851da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); 19861da177e4SLinus Torvalds goto connected; 19871da177e4SLinus Torvalds 19881da177e4SLinus Torvalds case 0x42: /* select timed out */ 19891da177e4SLinus Torvalds /* -> PHASE_IDLE */ 19901da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); 19911da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 19921da177e4SLinus Torvalds 19931da177e4SLinus Torvalds case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 19941da177e4SLinus Torvalds /* BUS FREE -> RESELECTION */ 19951da177e4SLinus Torvalds host->origSCpnt = host->SCpnt; 19961da177e4SLinus Torvalds host->SCpnt = NULL; 19971da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19981da177e4SLinus Torvalds acornscsi_reconnect(host); 19991da177e4SLinus Torvalds break; 20001da177e4SLinus Torvalds 20011da177e4SLinus Torvalds default: 20021da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", 20031da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20041da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20051da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20061da177e4SLinus Torvalds } 20071da177e4SLinus Torvalds return INTR_PROCESSING; 20081da177e4SLinus Torvalds 20091da177e4SLinus Torvalds connected: 20101da177e4SLinus Torvalds case PHASE_CONNECTED: /* STATE: device selected ok */ 20111da177e4SLinus Torvalds switch (ssr) { 20121da177e4SLinus Torvalds #ifdef NONSTANDARD 20131da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20141da177e4SLinus Torvalds /* SELECTION -> COMMAND */ 20151da177e4SLinus Torvalds acornscsi_sendcommand(host); 20161da177e4SLinus Torvalds break; 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 20191da177e4SLinus Torvalds /* SELECTION -> STATUS */ 20201da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 20211da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 20221da177e4SLinus Torvalds break; 20231da177e4SLinus Torvalds #endif 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 20261da177e4SLinus Torvalds /* SELECTION ->MESSAGE OUT */ 20271da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGOUT; 20281da177e4SLinus Torvalds acornscsi_buildmessages(host); 20291da177e4SLinus Torvalds acornscsi_sendmessage(host); 20301da177e4SLinus Torvalds break; 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds /* these should not happen */ 20331da177e4SLinus Torvalds case 0x85: /* target disconnected */ 20341da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 20351da177e4SLinus Torvalds break; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds default: 20381da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", 20391da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20401da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20411da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20421da177e4SLinus Torvalds } 20431da177e4SLinus Torvalds return INTR_PROCESSING; 20441da177e4SLinus Torvalds 20451da177e4SLinus Torvalds case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ 20461da177e4SLinus Torvalds /* 20471da177e4SLinus Torvalds * SCSI standard says that MESSAGE OUT phases can be followed by a 20481da177e4SLinus Torvalds * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase 20491da177e4SLinus Torvalds */ 20501da177e4SLinus Torvalds switch (ssr) { 20511da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20521da177e4SLinus Torvalds case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20531da177e4SLinus Torvalds /* MESSAGE OUT -> COMMAND */ 20541da177e4SLinus Torvalds acornscsi_sendcommand(host); 20551da177e4SLinus Torvalds break; 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 20581da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 20591da177e4SLinus Torvalds /* MESSAGE OUT -> STATUS */ 20601da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 20611da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 20621da177e4SLinus Torvalds break; 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 20651da177e4SLinus Torvalds /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ 20661da177e4SLinus Torvalds acornscsi_sendmessage(host); 20671da177e4SLinus Torvalds break; 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 20701da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 20711da177e4SLinus Torvalds /* MESSAGE OUT -> MESSAGE IN */ 20721da177e4SLinus Torvalds acornscsi_message(host); 20731da177e4SLinus Torvalds break; 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds default: 20761da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", 20771da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20781da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20791da177e4SLinus Torvalds } 20801da177e4SLinus Torvalds return INTR_PROCESSING; 20811da177e4SLinus Torvalds 20821da177e4SLinus Torvalds case PHASE_COMMAND: /* STATE: connected & command sent */ 20831da177e4SLinus Torvalds switch (ssr) { 20841da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 20851da177e4SLinus Torvalds /* COMMAND -> DATA OUT */ 20861da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 20871da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20881da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 20891da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 20901da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20911da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 20921da177e4SLinus Torvalds return INTR_IDLE; 20931da177e4SLinus Torvalds 20941da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 20951da177e4SLinus Torvalds /* COMMAND -> DATA IN */ 20961da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 20971da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20981da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 20991da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21001da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21011da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 21021da177e4SLinus Torvalds return INTR_IDLE; 21031da177e4SLinus Torvalds 21041da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 21051da177e4SLinus Torvalds /* COMMAND -> STATUS */ 21061da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21071da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21081da177e4SLinus Torvalds break; 21091da177e4SLinus Torvalds 21101da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 21111da177e4SLinus Torvalds /* COMMAND -> MESSAGE OUT */ 21121da177e4SLinus Torvalds acornscsi_sendmessage(host); 21131da177e4SLinus Torvalds break; 21141da177e4SLinus Torvalds 21151da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21161da177e4SLinus Torvalds /* COMMAND -> MESSAGE IN */ 21171da177e4SLinus Torvalds acornscsi_message(host); 21181da177e4SLinus Torvalds break; 21191da177e4SLinus Torvalds 21201da177e4SLinus Torvalds default: 21211da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n", 21221da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21231da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21241da177e4SLinus Torvalds } 21251da177e4SLinus Torvalds return INTR_PROCESSING; 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ 21281da177e4SLinus Torvalds if (ssr == 0x85) { /* -> PHASE_IDLE */ 21291da177e4SLinus Torvalds host->scsi.disconnectable = 1; 21301da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 21311da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 21321da177e4SLinus Torvalds host->stats.disconnects += 1; 21331da177e4SLinus Torvalds } else { 21341da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", 21351da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21361da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21371da177e4SLinus Torvalds } 21381da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 21391da177e4SLinus Torvalds 21401da177e4SLinus Torvalds case PHASE_IDLE: /* STATE: disconnected */ 21411da177e4SLinus Torvalds if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 21421da177e4SLinus Torvalds acornscsi_reconnect(host); 21431da177e4SLinus Torvalds else { 21441da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", 21451da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21461da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21471da177e4SLinus Torvalds } 21481da177e4SLinus Torvalds return INTR_PROCESSING; 21491da177e4SLinus Torvalds 21501da177e4SLinus Torvalds case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ 21511da177e4SLinus Torvalds /* 21521da177e4SLinus Torvalds * Command reconnected - if MESGIN, get message - it may be 21531da177e4SLinus Torvalds * the tag. If not, get command out of disconnected queue 21541da177e4SLinus Torvalds */ 21551da177e4SLinus Torvalds /* 21561da177e4SLinus Torvalds * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, 21571da177e4SLinus Torvalds * reconnect I_T_L command 21581da177e4SLinus Torvalds */ 21591da177e4SLinus Torvalds if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) 21601da177e4SLinus Torvalds return INTR_IDLE; 21611da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 21621da177e4SLinus Torvalds switch (ssr) { 21631da177e4SLinus Torvalds case 0x88: /* data out phase */ 21641da177e4SLinus Torvalds /* -> PHASE_DATAOUT */ 21651da177e4SLinus Torvalds /* MESSAGE IN -> DATA OUT */ 21661da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 21671da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21681da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21691da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 21701da177e4SLinus Torvalds return INTR_IDLE; 21711da177e4SLinus Torvalds 21721da177e4SLinus Torvalds case 0x89: /* data in phase */ 21731da177e4SLinus Torvalds /* -> PHASE_DATAIN */ 21741da177e4SLinus Torvalds /* MESSAGE IN -> DATA IN */ 21751da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 21761da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21771da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21781da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 21791da177e4SLinus Torvalds return INTR_IDLE; 21801da177e4SLinus Torvalds 21811da177e4SLinus Torvalds case 0x8a: /* command out */ 21821da177e4SLinus Torvalds /* MESSAGE IN -> COMMAND */ 21831da177e4SLinus Torvalds acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 21841da177e4SLinus Torvalds break; 21851da177e4SLinus Torvalds 21861da177e4SLinus Torvalds case 0x8b: /* status in */ 21871da177e4SLinus Torvalds /* -> PHASE_STATUSIN */ 21881da177e4SLinus Torvalds /* MESSAGE IN -> STATUS */ 21891da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21901da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21911da177e4SLinus Torvalds break; 21921da177e4SLinus Torvalds 21931da177e4SLinus Torvalds case 0x8e: /* message out */ 21941da177e4SLinus Torvalds /* -> PHASE_MSGOUT */ 21951da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 21961da177e4SLinus Torvalds acornscsi_sendmessage(host); 21971da177e4SLinus Torvalds break; 21981da177e4SLinus Torvalds 21991da177e4SLinus Torvalds case 0x8f: /* message in */ 22001da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 22011da177e4SLinus Torvalds break; 22021da177e4SLinus Torvalds 22031da177e4SLinus Torvalds default: 22041da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", 22051da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22061da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 22071da177e4SLinus Torvalds } 22081da177e4SLinus Torvalds return INTR_PROCESSING; 22091da177e4SLinus Torvalds 22101da177e4SLinus Torvalds case PHASE_DATAIN: /* STATE: transferred data in */ 22111da177e4SLinus Torvalds /* 22121da177e4SLinus Torvalds * This is simple - if we disconnect then the DMA address & count is 22131da177e4SLinus Torvalds * correct. 22141da177e4SLinus Torvalds */ 22151da177e4SLinus Torvalds switch (ssr) { 22161da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 22171da177e4SLinus Torvalds case 0x89: /* -> PHASE_DATAIN */ 22181da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22191da177e4SLinus Torvalds return INTR_IDLE; 22201da177e4SLinus Torvalds 22211da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 22221da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 22231da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 22241da177e4SLinus Torvalds /* DATA IN -> STATUS */ 222584ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22261da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22271da177e4SLinus Torvalds acornscsi_dma_stop(host); 22281da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22291da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22301da177e4SLinus Torvalds break; 22311da177e4SLinus Torvalds 22321da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 22331da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 22341da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 22351da177e4SLinus Torvalds /* DATA IN -> MESSAGE OUT */ 223684ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22371da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22381da177e4SLinus Torvalds acornscsi_dma_stop(host); 22391da177e4SLinus Torvalds acornscsi_sendmessage(host); 22401da177e4SLinus Torvalds break; 22411da177e4SLinus Torvalds 22421da177e4SLinus Torvalds case 0x1f: /* message in */ 22431da177e4SLinus Torvalds case 0x4f: /* message in */ 22441da177e4SLinus Torvalds case 0x8f: /* message in */ 22451da177e4SLinus Torvalds /* DATA IN -> MESSAGE IN */ 224684ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22471da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22481da177e4SLinus Torvalds acornscsi_dma_stop(host); 22491da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 22501da177e4SLinus Torvalds break; 22511da177e4SLinus Torvalds 22521da177e4SLinus Torvalds default: 22531da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", 22541da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22551da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 22561da177e4SLinus Torvalds } 22571da177e4SLinus Torvalds return INTR_PROCESSING; 22581da177e4SLinus Torvalds 22591da177e4SLinus Torvalds case PHASE_DATAOUT: /* STATE: transferred data out */ 22601da177e4SLinus Torvalds /* 22611da177e4SLinus Torvalds * This is more complicated - if we disconnect, the DMA could be 12 22621da177e4SLinus Torvalds * bytes ahead of us. We need to correct this. 22631da177e4SLinus Torvalds */ 22641da177e4SLinus Torvalds switch (ssr) { 22651da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 22661da177e4SLinus Torvalds case 0x88: /* -> PHASE_DATAOUT */ 22671da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22681da177e4SLinus Torvalds return INTR_IDLE; 22691da177e4SLinus Torvalds 22701da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 22711da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 22721da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 22731da177e4SLinus Torvalds /* DATA OUT -> STATUS */ 227484ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22751da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22761da177e4SLinus Torvalds acornscsi_dma_stop(host); 22771da177e4SLinus Torvalds acornscsi_dma_adjust(host); 22781da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22791da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22801da177e4SLinus Torvalds break; 22811da177e4SLinus Torvalds 22821da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 22831da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 22841da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 22851da177e4SLinus Torvalds /* DATA OUT -> MESSAGE OUT */ 228684ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22871da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22881da177e4SLinus Torvalds acornscsi_dma_stop(host); 22891da177e4SLinus Torvalds acornscsi_dma_adjust(host); 22901da177e4SLinus Torvalds acornscsi_sendmessage(host); 22911da177e4SLinus Torvalds break; 22921da177e4SLinus Torvalds 22931da177e4SLinus Torvalds case 0x1f: /* message in */ 22941da177e4SLinus Torvalds case 0x4f: /* message in */ 22951da177e4SLinus Torvalds case 0x8f: /* message in */ 22961da177e4SLinus Torvalds /* DATA OUT -> MESSAGE IN */ 229784ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22981da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22991da177e4SLinus Torvalds acornscsi_dma_stop(host); 23001da177e4SLinus Torvalds acornscsi_dma_adjust(host); 23011da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 23021da177e4SLinus Torvalds break; 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds default: 23051da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", 23061da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23071da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds return INTR_PROCESSING; 23101da177e4SLinus Torvalds 23111da177e4SLinus Torvalds case PHASE_STATUSIN: /* STATE: status in complete */ 23121da177e4SLinus Torvalds switch (ssr) { 23131da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23141da177e4SLinus Torvalds case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23151da177e4SLinus Torvalds /* STATUS -> MESSAGE IN */ 23161da177e4SLinus Torvalds acornscsi_message(host); 23171da177e4SLinus Torvalds break; 23181da177e4SLinus Torvalds 23191da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23201da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23211da177e4SLinus Torvalds /* STATUS -> MESSAGE OUT */ 23221da177e4SLinus Torvalds acornscsi_sendmessage(host); 23231da177e4SLinus Torvalds break; 23241da177e4SLinus Torvalds 23251da177e4SLinus Torvalds default: 23261da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", 23271da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23281da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds return INTR_PROCESSING; 23311da177e4SLinus Torvalds 23321da177e4SLinus Torvalds case PHASE_MSGIN: /* STATE: message in */ 23331da177e4SLinus Torvalds switch (ssr) { 23341da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23351da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 23361da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23371da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 23381da177e4SLinus Torvalds acornscsi_sendmessage(host); 23391da177e4SLinus Torvalds break; 23401da177e4SLinus Torvalds 23411da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23421da177e4SLinus Torvalds case 0x2f: 23431da177e4SLinus Torvalds case 0x4f: 23441da177e4SLinus Torvalds case 0x8f: 23451da177e4SLinus Torvalds acornscsi_message(host); 23461da177e4SLinus Torvalds break; 23471da177e4SLinus Torvalds 23481da177e4SLinus Torvalds case 0x85: 23491da177e4SLinus Torvalds printk("scsi%d.%c: strange message in disconnection\n", 23501da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 23511da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23521da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 23531da177e4SLinus Torvalds break; 23541da177e4SLinus Torvalds 23551da177e4SLinus Torvalds default: 23561da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", 23571da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23581da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds return INTR_PROCESSING; 23611da177e4SLinus Torvalds 23621da177e4SLinus Torvalds case PHASE_DONE: /* STATE: received status & message */ 23631da177e4SLinus Torvalds switch (ssr) { 23641da177e4SLinus Torvalds case 0x85: /* -> PHASE_IDLE */ 23651da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_OK); 23661da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 23671da177e4SLinus Torvalds 23681da177e4SLinus Torvalds case 0x1e: 23691da177e4SLinus Torvalds case 0x8e: 23701da177e4SLinus Torvalds acornscsi_sendmessage(host); 23711da177e4SLinus Torvalds break; 23721da177e4SLinus Torvalds 23731da177e4SLinus Torvalds default: 23741da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", 23751da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23761da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23771da177e4SLinus Torvalds } 23781da177e4SLinus Torvalds return INTR_PROCESSING; 23791da177e4SLinus Torvalds 23801da177e4SLinus Torvalds case PHASE_ABORTED: 23811da177e4SLinus Torvalds switch (ssr) { 23821da177e4SLinus Torvalds case 0x85: 23831da177e4SLinus Torvalds if (host->SCpnt) 23841da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ABORT); 23851da177e4SLinus Torvalds else { 23861da177e4SLinus Torvalds clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, 23871da177e4SLinus Torvalds host->busyluns); 23881da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 23911da177e4SLinus Torvalds 23921da177e4SLinus Torvalds case 0x1e: 23931da177e4SLinus Torvalds case 0x2e: 23941da177e4SLinus Torvalds case 0x4e: 23951da177e4SLinus Torvalds case 0x8e: 23961da177e4SLinus Torvalds acornscsi_sendmessage(host); 23971da177e4SLinus Torvalds break; 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds default: 24001da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\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 default: 24071da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", 24081da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24091da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds return INTR_PROCESSING; 24121da177e4SLinus Torvalds } 24131da177e4SLinus Torvalds 24141da177e4SLinus Torvalds /* 24157d12e780SDavid Howells * Prototype: void acornscsi_intr(int irq, void *dev_id) 24161da177e4SLinus Torvalds * Purpose : handle interrupts from Acorn SCSI card 24171da177e4SLinus Torvalds * Params : irq - interrupt number 24181da177e4SLinus Torvalds * dev_id - device specific data (AS_Host structure) 24191da177e4SLinus Torvalds */ 24201da177e4SLinus Torvalds static irqreturn_t 24217d12e780SDavid Howells acornscsi_intr(int irq, void *dev_id) 24221da177e4SLinus Torvalds { 24231da177e4SLinus Torvalds AS_Host *host = (AS_Host *)dev_id; 24241da177e4SLinus Torvalds intr_ret_t ret; 24251da177e4SLinus Torvalds int iostatus; 24261da177e4SLinus Torvalds int in_irq = 0; 24271da177e4SLinus Torvalds 24281da177e4SLinus Torvalds do { 24291da177e4SLinus Torvalds ret = INTR_IDLE; 24301da177e4SLinus Torvalds 2431e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24321da177e4SLinus Torvalds 24331da177e4SLinus Torvalds if (iostatus & 2) { 24341da177e4SLinus Torvalds acornscsi_dma_intr(host); 2435e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24361da177e4SLinus Torvalds } 24371da177e4SLinus Torvalds 24381da177e4SLinus Torvalds if (iostatus & 8) 24391da177e4SLinus Torvalds ret = acornscsi_sbicintr(host, in_irq); 24401da177e4SLinus Torvalds 24411da177e4SLinus Torvalds /* 24421da177e4SLinus Torvalds * If we have a transfer pending, start it. 24431da177e4SLinus Torvalds * Only start it if the interface has already started transferring 24441da177e4SLinus Torvalds * it's data 24451da177e4SLinus Torvalds */ 24461da177e4SLinus Torvalds if (host->dma.xfer_required) 24471da177e4SLinus Torvalds acornscsi_dma_xfer(host); 24481da177e4SLinus Torvalds 24491da177e4SLinus Torvalds if (ret == INTR_NEXT_COMMAND) 24501da177e4SLinus Torvalds ret = acornscsi_kick(host); 24511da177e4SLinus Torvalds 24521da177e4SLinus Torvalds in_irq = 1; 24531da177e4SLinus Torvalds } while (ret != INTR_IDLE); 24541da177e4SLinus Torvalds 24551da177e4SLinus Torvalds return IRQ_HANDLED; 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds /*============================================================================================= 24591da177e4SLinus Torvalds * Interfaces between interrupt handler and rest of scsi code 24601da177e4SLinus Torvalds */ 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds /* 2463ee0ca6baSHenne * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 24641da177e4SLinus Torvalds * Purpose : queues a SCSI command 24651da177e4SLinus Torvalds * Params : cmd - SCSI command 24661da177e4SLinus Torvalds * done - function called on completion, with pointer to command descriptor 24671da177e4SLinus Torvalds * Returns : 0, or < 0 on error. 24681da177e4SLinus Torvalds */ 2469f281233dSJeff Garzik static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt, 2470ee0ca6baSHenne void (*done)(struct scsi_cmnd *)) 24711da177e4SLinus Torvalds { 24721da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 24731da177e4SLinus Torvalds 24741da177e4SLinus Torvalds if (!done) { 24751da177e4SLinus Torvalds /* there should be some way of rejecting errors like this without panicing... */ 24761da177e4SLinus Torvalds panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", 24771da177e4SLinus Torvalds host->host->host_no, SCpnt); 24781da177e4SLinus Torvalds return -EINVAL; 24791da177e4SLinus Torvalds } 24801da177e4SLinus Torvalds 24811da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 24821da177e4SLinus Torvalds if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { 24831da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", 24841da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id); 24851da177e4SLinus Torvalds SCpnt->result = DID_NO_CONNECT << 16; 24861da177e4SLinus Torvalds done(SCpnt); 24871da177e4SLinus Torvalds return 0; 24881da177e4SLinus Torvalds } 24891da177e4SLinus Torvalds #endif 24901da177e4SLinus Torvalds 24911da177e4SLinus Torvalds SCpnt->scsi_done = done; 24921da177e4SLinus Torvalds SCpnt->host_scribble = NULL; 24931da177e4SLinus Torvalds SCpnt->result = 0; 24941da177e4SLinus Torvalds SCpnt->tag = 0; 24951da177e4SLinus Torvalds SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); 24961da177e4SLinus Torvalds SCpnt->SCp.sent_command = 0; 24971da177e4SLinus Torvalds SCpnt->SCp.scsi_xferred = 0; 24981da177e4SLinus Torvalds 24991da177e4SLinus Torvalds init_SCp(SCpnt); 25001da177e4SLinus Torvalds 25011da177e4SLinus Torvalds host->stats.queues += 1; 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds { 25041da177e4SLinus Torvalds unsigned long flags; 25051da177e4SLinus Torvalds 25061da177e4SLinus Torvalds if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { 25071da177e4SLinus Torvalds SCpnt->result = DID_ERROR << 16; 25081da177e4SLinus Torvalds done(SCpnt); 25091da177e4SLinus Torvalds return 0; 25101da177e4SLinus Torvalds } 25111da177e4SLinus Torvalds local_irq_save(flags); 25121da177e4SLinus Torvalds if (host->scsi.phase == PHASE_IDLE) 25131da177e4SLinus Torvalds acornscsi_kick(host); 25141da177e4SLinus Torvalds local_irq_restore(flags); 25151da177e4SLinus Torvalds } 25161da177e4SLinus Torvalds return 0; 25171da177e4SLinus Torvalds } 25181da177e4SLinus Torvalds 2519f281233dSJeff Garzik DEF_SCSI_QCMD(acornscsi_queuecmd) 2520f281233dSJeff Garzik 25211da177e4SLinus Torvalds /* 2522ee0ca6baSHenne * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result) 25231da177e4SLinus Torvalds * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 25241da177e4SLinus Torvalds * Params : SCpntp1 - pointer to command to return 25251da177e4SLinus Torvalds * SCpntp2 - pointer to command to check 25261da177e4SLinus Torvalds * result - result to pass back to mid-level done function 25271da177e4SLinus Torvalds * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. 25281da177e4SLinus Torvalds */ 2529ee0ca6baSHenne static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, 2530ee0ca6baSHenne struct scsi_cmnd **SCpntp2, 2531ee0ca6baSHenne int result) 25321da177e4SLinus Torvalds { 2533ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp1; 25341da177e4SLinus Torvalds 25351da177e4SLinus Torvalds if (SCpnt) { 25361da177e4SLinus Torvalds *SCpntp1 = NULL; 25371da177e4SLinus Torvalds 25381da177e4SLinus Torvalds SCpnt->result = result; 25391da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 25401da177e4SLinus Torvalds } 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds if (SCpnt == *SCpntp2) 25431da177e4SLinus Torvalds *SCpntp2 = NULL; 25441da177e4SLinus Torvalds } 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; 25471da177e4SLinus Torvalds 25481da177e4SLinus Torvalds /* 2549ee0ca6baSHenne * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) 25501da177e4SLinus Torvalds * Purpose : abort a command on this host 25511da177e4SLinus Torvalds * Params : SCpnt - command to abort 25521da177e4SLinus Torvalds * Returns : our abort status 25531da177e4SLinus Torvalds */ 2554ee0ca6baSHenne static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt) 25551da177e4SLinus Torvalds { 25561da177e4SLinus Torvalds enum res_abort res = res_not_running; 25571da177e4SLinus Torvalds 25581da177e4SLinus Torvalds if (queue_remove_cmd(&host->queues.issue, SCpnt)) { 25591da177e4SLinus Torvalds /* 25601da177e4SLinus Torvalds * The command was on the issue queue, and has not been 25611da177e4SLinus Torvalds * issued yet. We can remove the command from the queue, 25621da177e4SLinus Torvalds * and acknowledge the abort. Neither the devices nor the 25631da177e4SLinus Torvalds * interface know about the command. 25641da177e4SLinus Torvalds */ 25651da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25661da177e4SLinus Torvalds printk("on issue queue "); 25671da177e4SLinus Torvalds //#endif 25681da177e4SLinus Torvalds res = res_success; 25691da177e4SLinus Torvalds } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { 25701da177e4SLinus Torvalds /* 25711da177e4SLinus Torvalds * The command was on the disconnected queue. Simply 25721da177e4SLinus Torvalds * acknowledge the abort condition, and when the target 25731da177e4SLinus Torvalds * reconnects, we will give it an ABORT message. The 25741da177e4SLinus Torvalds * target should then disconnect, and we will clear 25751da177e4SLinus Torvalds * the busylun bit. 25761da177e4SLinus Torvalds */ 25771da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25781da177e4SLinus Torvalds printk("on disconnected queue "); 25791da177e4SLinus Torvalds //#endif 25801da177e4SLinus Torvalds res = res_success; 25811da177e4SLinus Torvalds } else if (host->SCpnt == SCpnt) { 25821da177e4SLinus Torvalds unsigned long flags; 25831da177e4SLinus Torvalds 25841da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25851da177e4SLinus Torvalds printk("executing "); 25861da177e4SLinus Torvalds //#endif 25871da177e4SLinus Torvalds 25881da177e4SLinus Torvalds local_irq_save(flags); 25891da177e4SLinus Torvalds switch (host->scsi.phase) { 25901da177e4SLinus Torvalds /* 25911da177e4SLinus Torvalds * If the interface is idle, and the command is 'disconnectable', 25921da177e4SLinus Torvalds * then it is the same as on the disconnected queue. We simply 25931da177e4SLinus Torvalds * remove all traces of the command. When the target reconnects, 25941da177e4SLinus Torvalds * we will give it an ABORT message since the command could not 25951da177e4SLinus Torvalds * be found. When the target finally disconnects, we will clear 25961da177e4SLinus Torvalds * the busylun bit. 25971da177e4SLinus Torvalds */ 25981da177e4SLinus Torvalds case PHASE_IDLE: 25991da177e4SLinus Torvalds if (host->scsi.disconnectable) { 26001da177e4SLinus Torvalds host->scsi.disconnectable = 0; 26011da177e4SLinus Torvalds host->SCpnt = NULL; 26021da177e4SLinus Torvalds res = res_success; 26031da177e4SLinus Torvalds } 26041da177e4SLinus Torvalds break; 26051da177e4SLinus Torvalds 26061da177e4SLinus Torvalds /* 26071da177e4SLinus Torvalds * If the command has connected and done nothing further, 26081da177e4SLinus Torvalds * simply force a disconnect. We also need to clear the 26091da177e4SLinus Torvalds * busylun bit. 26101da177e4SLinus Torvalds */ 26111da177e4SLinus Torvalds case PHASE_CONNECTED: 2612ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT); 26131da177e4SLinus Torvalds host->SCpnt = NULL; 26141da177e4SLinus Torvalds res = res_success_clear; 26151da177e4SLinus Torvalds break; 26161da177e4SLinus Torvalds 26171da177e4SLinus Torvalds default: 26181da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 26191da177e4SLinus Torvalds res = res_snooze; 26201da177e4SLinus Torvalds } 26211da177e4SLinus Torvalds local_irq_restore(flags); 26221da177e4SLinus Torvalds } else if (host->origSCpnt == SCpnt) { 26231da177e4SLinus Torvalds /* 26241da177e4SLinus Torvalds * The command will be executed next, but a command 26251da177e4SLinus Torvalds * is currently using the interface. This is similar to 26261da177e4SLinus Torvalds * being on the issue queue, except the busylun bit has 26271da177e4SLinus Torvalds * been set. 26281da177e4SLinus Torvalds */ 26291da177e4SLinus Torvalds host->origSCpnt = NULL; 26301da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26311da177e4SLinus Torvalds printk("waiting for execution "); 26321da177e4SLinus Torvalds //#endif 26331da177e4SLinus Torvalds res = res_success_clear; 26341da177e4SLinus Torvalds } else 26351da177e4SLinus Torvalds printk("unknown "); 26361da177e4SLinus Torvalds 26371da177e4SLinus Torvalds return res; 26381da177e4SLinus Torvalds } 26391da177e4SLinus Torvalds 26401da177e4SLinus Torvalds /* 2641ee0ca6baSHenne * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) 26421da177e4SLinus Torvalds * Purpose : abort a command on this host 26431da177e4SLinus Torvalds * Params : SCpnt - command to abort 26441da177e4SLinus Torvalds * Returns : one of SCSI_ABORT_ macros 26451da177e4SLinus Torvalds */ 2646ee0ca6baSHenne int acornscsi_abort(struct scsi_cmnd *SCpnt) 26471da177e4SLinus Torvalds { 26481da177e4SLinus Torvalds AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; 26491da177e4SLinus Torvalds int result; 26501da177e4SLinus Torvalds 26511da177e4SLinus Torvalds host->stats.aborts += 1; 26521da177e4SLinus Torvalds 26531da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 26541da177e4SLinus Torvalds { 26551da177e4SLinus Torvalds int asr, ssr; 2656ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2657ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 26581da177e4SLinus Torvalds 26591da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_abort: "); 26601da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 26611da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 26621da177e4SLinus Torvalds } 26631da177e4SLinus Torvalds #endif 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds printk("scsi%d: ", host->host->host_no); 26661da177e4SLinus Torvalds 26671da177e4SLinus Torvalds switch (acornscsi_do_abort(host, SCpnt)) { 26681da177e4SLinus Torvalds /* 26691da177e4SLinus Torvalds * We managed to find the command and cleared it out. 26701da177e4SLinus Torvalds * We do not expect the command to be executing on the 26711da177e4SLinus Torvalds * target, but we have set the busylun bit. 26721da177e4SLinus Torvalds */ 26731da177e4SLinus Torvalds case res_success_clear: 26741da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26751da177e4SLinus Torvalds printk("clear "); 26761da177e4SLinus Torvalds //#endif 26779cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 + 26789cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns); 26791da177e4SLinus Torvalds 26801da177e4SLinus Torvalds /* 26811da177e4SLinus Torvalds * We found the command, and cleared it out. Either 26821da177e4SLinus Torvalds * the command is still known to be executing on the 26831da177e4SLinus Torvalds * target, or the busylun bit is not set. 26841da177e4SLinus Torvalds */ 26851da177e4SLinus Torvalds case res_success: 26861da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26871da177e4SLinus Torvalds printk("success\n"); 26881da177e4SLinus Torvalds //#endif 2689324b9337SRussell King result = SUCCESS; 26901da177e4SLinus Torvalds break; 26911da177e4SLinus Torvalds 26921da177e4SLinus Torvalds /* 26931da177e4SLinus Torvalds * We did find the command, but unfortunately we couldn't 26941da177e4SLinus Torvalds * unhook it from ourselves. Wait some more, and if it 26951da177e4SLinus Torvalds * still doesn't complete, reset the interface. 26961da177e4SLinus Torvalds */ 26971da177e4SLinus Torvalds case res_snooze: 26981da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26991da177e4SLinus Torvalds printk("snooze\n"); 27001da177e4SLinus Torvalds //#endif 2701324b9337SRussell King result = FAILED; 27021da177e4SLinus Torvalds break; 27031da177e4SLinus Torvalds 27041da177e4SLinus Torvalds /* 27051da177e4SLinus Torvalds * The command could not be found (either because it completed, 27061da177e4SLinus Torvalds * or it got dropped. 27071da177e4SLinus Torvalds */ 27081da177e4SLinus Torvalds default: 27091da177e4SLinus Torvalds case res_not_running: 27101da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 2711324b9337SRussell King result = FAILED; 27121da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27131da177e4SLinus Torvalds printk("not running\n"); 27141da177e4SLinus Torvalds //#endif 27151da177e4SLinus Torvalds break; 27161da177e4SLinus Torvalds } 27171da177e4SLinus Torvalds 27181da177e4SLinus Torvalds return result; 27191da177e4SLinus Torvalds } 27201da177e4SLinus Torvalds 27211da177e4SLinus Torvalds /* 2722324b9337SRussell King * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) 27231da177e4SLinus Torvalds * Purpose : reset a command on this host/reset this host 27241da177e4SLinus Torvalds * Params : SCpnt - command causing reset 27251da177e4SLinus Torvalds * Returns : one of SCSI_RESET_ macros 27261da177e4SLinus Torvalds */ 2727324b9337SRussell King int acornscsi_bus_reset(struct scsi_cmnd *SCpnt) 27281da177e4SLinus Torvalds { 27291da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 2730ee0ca6baSHenne struct scsi_cmnd *SCptr; 27311da177e4SLinus Torvalds 27321da177e4SLinus Torvalds host->stats.resets += 1; 27331da177e4SLinus Torvalds 27341da177e4SLinus Torvalds #if (DEBUG & DEBUG_RESET) 27351da177e4SLinus Torvalds { 27361da177e4SLinus Torvalds int asr, ssr; 27371da177e4SLinus Torvalds 2738ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2739ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 27401da177e4SLinus Torvalds 27411da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_reset: "); 27421da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 27431da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 27441da177e4SLinus Torvalds } 27451da177e4SLinus Torvalds #endif 27461da177e4SLinus Torvalds 27471da177e4SLinus Torvalds acornscsi_dma_stop(host); 27481da177e4SLinus Torvalds 27491da177e4SLinus Torvalds /* 27501da177e4SLinus Torvalds * do hard reset. This resets all devices on this host, and so we 27511da177e4SLinus Torvalds * must set the reset status on all commands. 27521da177e4SLinus Torvalds */ 27531da177e4SLinus Torvalds acornscsi_resetcard(host); 27541da177e4SLinus Torvalds 27551da177e4SLinus Torvalds while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) 2756324b9337SRussell King ; 27571da177e4SLinus Torvalds 2758324b9337SRussell King return SUCCESS; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds 27611da177e4SLinus Torvalds /*============================================================================================== 27621da177e4SLinus Torvalds * initialisation & miscellaneous support 27631da177e4SLinus Torvalds */ 27641da177e4SLinus Torvalds 27651da177e4SLinus Torvalds /* 27661da177e4SLinus Torvalds * Function: char *acornscsi_info(struct Scsi_Host *host) 27671da177e4SLinus Torvalds * Purpose : return a string describing this interface 27681da177e4SLinus Torvalds * Params : host - host to give information on 27691da177e4SLinus Torvalds * Returns : a constant string 27701da177e4SLinus Torvalds */ 27711da177e4SLinus Torvalds const 27721da177e4SLinus Torvalds char *acornscsi_info(struct Scsi_Host *host) 27731da177e4SLinus Torvalds { 27741da177e4SLinus Torvalds static char string[100], *p; 27751da177e4SLinus Torvalds 27761da177e4SLinus Torvalds p = string; 27771da177e4SLinus Torvalds 27781da177e4SLinus Torvalds p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" 27791da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 27801da177e4SLinus Torvalds " SYNC" 27811da177e4SLinus Torvalds #endif 27821da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 27831da177e4SLinus Torvalds " TAG" 27841da177e4SLinus Torvalds #endif 27851da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2786a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 27871da177e4SLinus Torvalds #endif 27881da177e4SLinus Torvalds , host->hostt->name, host->io_port, host->irq, 27891da177e4SLinus Torvalds VER_MAJOR, VER_MINOR, VER_PATCH); 27901da177e4SLinus Torvalds return string; 27911da177e4SLinus Torvalds } 27921da177e4SLinus Torvalds 279356b8e8e5SAl Viro static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance) 27941da177e4SLinus Torvalds { 279556b8e8e5SAl Viro int devidx; 2796f64a181dSChristoph Hellwig struct scsi_device *scd; 27971da177e4SLinus Torvalds AS_Host *host; 27981da177e4SLinus Torvalds 27991da177e4SLinus Torvalds host = (AS_Host *)instance->hostdata; 28001da177e4SLinus Torvalds 280156b8e8e5SAl Viro seq_printf(m, "AcornSCSI driver v%d.%d.%d" 28021da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 28031da177e4SLinus Torvalds " SYNC" 28041da177e4SLinus Torvalds #endif 28051da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 28061da177e4SLinus Torvalds " TAG" 28071da177e4SLinus Torvalds #endif 28081da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2809a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 28101da177e4SLinus Torvalds #endif 28111da177e4SLinus Torvalds "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); 28121da177e4SLinus Torvalds 281356b8e8e5SAl Viro seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n", 2814e95a1b65SRussell King host->base + SBIC_REGIDX, host->scsi.irq); 28151da177e4SLinus Torvalds #ifdef USE_DMAC 281656b8e8e5SAl Viro seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n", 2817e95a1b65SRussell King host->base + DMAC_OFFSET, host->scsi.irq); 28181da177e4SLinus Torvalds #endif 28191da177e4SLinus Torvalds 282056b8e8e5SAl Viro seq_printf(m, "Statistics:\n" 28211da177e4SLinus Torvalds "Queued commands: %-10u Issued commands: %-10u\n" 28221da177e4SLinus Torvalds "Done commands : %-10u Reads : %-10u\n" 28231da177e4SLinus Torvalds "Writes : %-10u Others : %-10u\n" 28241da177e4SLinus Torvalds "Disconnects : %-10u Aborts : %-10u\n" 28251da177e4SLinus Torvalds "Resets : %-10u\n\nLast phases:", 28261da177e4SLinus Torvalds host->stats.queues, host->stats.removes, 28271da177e4SLinus Torvalds host->stats.fins, host->stats.reads, 28281da177e4SLinus Torvalds host->stats.writes, host->stats.miscs, 28291da177e4SLinus Torvalds host->stats.disconnects, host->stats.aborts, 28301da177e4SLinus Torvalds host->stats.resets); 28311da177e4SLinus Torvalds 28321da177e4SLinus Torvalds for (devidx = 0; devidx < 9; devidx ++) { 28331da177e4SLinus Torvalds unsigned int statptr, prev; 28341da177e4SLinus Torvalds 283556b8e8e5SAl Viro seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); 28361da177e4SLinus Torvalds statptr = host->status_ptr[devidx] - 10; 28371da177e4SLinus Torvalds 28381da177e4SLinus Torvalds if ((signed int)statptr < 0) 28391da177e4SLinus Torvalds statptr += STATUS_BUFFER_SIZE; 28401da177e4SLinus Torvalds 28411da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 28421da177e4SLinus Torvalds 28431da177e4SLinus Torvalds for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 28441da177e4SLinus Torvalds if (host->status[devidx][statptr].when) { 284556b8e8e5SAl Viro seq_printf(m, "%c%02X:%02X+%2ld", 28461da177e4SLinus Torvalds host->status[devidx][statptr].irq ? '-' : ' ', 28471da177e4SLinus Torvalds host->status[devidx][statptr].ph, 28481da177e4SLinus Torvalds host->status[devidx][statptr].ssr, 28491da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) < 100 ? 28501da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) : 99); 28511da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 28521da177e4SLinus Torvalds } 28531da177e4SLinus Torvalds } 28541da177e4SLinus Torvalds } 28551da177e4SLinus Torvalds 285656b8e8e5SAl Viro seq_printf(m, "\nAttached devices:\n"); 28571da177e4SLinus Torvalds 28581da177e4SLinus Torvalds shost_for_each_device(scd, instance) { 285956b8e8e5SAl Viro seq_printf(m, "Device/Lun TaggedQ Sync\n"); 28609cb78c16SHannes Reinecke seq_printf(m, " %d/%llu ", scd->id, scd->lun); 28611da177e4SLinus Torvalds if (scd->tagged_supported) 286256b8e8e5SAl Viro seq_printf(m, "%3sabled(%3d) ", 28631da177e4SLinus Torvalds scd->simple_tags ? "en" : "dis", 28641da177e4SLinus Torvalds scd->current_tag); 28651da177e4SLinus Torvalds else 286656b8e8e5SAl Viro seq_printf(m, "unsupported "); 28671da177e4SLinus Torvalds 28681da177e4SLinus Torvalds if (host->device[scd->id].sync_xfer & 15) 286956b8e8e5SAl Viro seq_printf(m, "offset %d, %d ns\n", 28701da177e4SLinus Torvalds host->device[scd->id].sync_xfer & 15, 28711da177e4SLinus Torvalds acornscsi_getperiod(host->device[scd->id].sync_xfer)); 28721da177e4SLinus Torvalds else 287356b8e8e5SAl Viro seq_printf(m, "async\n"); 28741da177e4SLinus Torvalds 28751da177e4SLinus Torvalds } 287656b8e8e5SAl Viro return 0; 28771da177e4SLinus Torvalds } 28781da177e4SLinus Torvalds 2879d0be4a7dSChristoph Hellwig static struct scsi_host_template acornscsi_template = { 28801da177e4SLinus Torvalds .module = THIS_MODULE, 288156b8e8e5SAl Viro .show_info = acornscsi_show_info, 28821da177e4SLinus Torvalds .name = "AcornSCSI", 28831da177e4SLinus Torvalds .info = acornscsi_info, 28841da177e4SLinus Torvalds .queuecommand = acornscsi_queuecmd, 2885324b9337SRussell King .eh_abort_handler = acornscsi_abort, 2886324b9337SRussell King .eh_bus_reset_handler = acornscsi_bus_reset, 28871da177e4SLinus Torvalds .can_queue = 16, 28881da177e4SLinus Torvalds .this_id = 7, 28891da177e4SLinus Torvalds .sg_tablesize = SG_ALL, 28901da177e4SLinus Torvalds .cmd_per_lun = 2, 28911da177e4SLinus Torvalds .use_clustering = DISABLE_CLUSTERING, 28921da177e4SLinus Torvalds .proc_name = "acornscsi", 28931da177e4SLinus Torvalds }; 28941da177e4SLinus Torvalds 28956f039790SGreg Kroah-Hartman static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 28961da177e4SLinus Torvalds { 28971da177e4SLinus Torvalds struct Scsi_Host *host; 28981da177e4SLinus Torvalds AS_Host *ashost; 2899e95a1b65SRussell King int ret; 2900e95a1b65SRussell King 2901e95a1b65SRussell King ret = ecard_request_resources(ec); 2902e95a1b65SRussell King if (ret) 2903e95a1b65SRussell King goto out; 29041da177e4SLinus Torvalds 29051da177e4SLinus Torvalds host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); 2906e95a1b65SRussell King if (!host) { 2907e95a1b65SRussell King ret = -ENOMEM; 2908e95a1b65SRussell King goto out_release; 2909e95a1b65SRussell King } 29101da177e4SLinus Torvalds 29111da177e4SLinus Torvalds ashost = (AS_Host *)host->hostdata; 29121da177e4SLinus Torvalds 2913e95a1b65SRussell King ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 2914e95a1b65SRussell King ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 2915e95a1b65SRussell King if (!ashost->base || !ashost->fast) 2916e95a1b65SRussell King goto out_put; 2917e95a1b65SRussell King 29181da177e4SLinus Torvalds host->irq = ec->irq; 29191da177e4SLinus Torvalds ashost->host = host; 29201da177e4SLinus Torvalds ashost->scsi.irq = host->irq; 29211da177e4SLinus Torvalds 2922e95a1b65SRussell King ec->irqaddr = ashost->fast + INT_REG; 29231da177e4SLinus Torvalds ec->irqmask = 0x0a; 29241da177e4SLinus Torvalds 29254909cc2bSMichael Opdenacker ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost); 29261da177e4SLinus Torvalds if (ret) { 29271da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", 29281da177e4SLinus Torvalds host->host_no, ashost->scsi.irq, ret); 2929e95a1b65SRussell King goto out_put; 29301da177e4SLinus Torvalds } 29311da177e4SLinus Torvalds 29321da177e4SLinus Torvalds memset(&ashost->stats, 0, sizeof (ashost->stats)); 29331da177e4SLinus Torvalds queue_initialise(&ashost->queues.issue); 29341da177e4SLinus Torvalds queue_initialise(&ashost->queues.disconnected); 29351da177e4SLinus Torvalds msgqueue_initialise(&ashost->scsi.msgs); 29361da177e4SLinus Torvalds 29371da177e4SLinus Torvalds acornscsi_resetcard(ashost); 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds ret = scsi_add_host(host, &ec->dev); 29401da177e4SLinus Torvalds if (ret) 2941e95a1b65SRussell King goto out_irq; 29421da177e4SLinus Torvalds 29431da177e4SLinus Torvalds scsi_scan_host(host); 29441da177e4SLinus Torvalds goto out; 29451da177e4SLinus Torvalds 2946e95a1b65SRussell King out_irq: 29471da177e4SLinus Torvalds free_irq(host->irq, ashost); 2948e95a1b65SRussell King msgqueue_free(&ashost->scsi.msgs); 2949e95a1b65SRussell King queue_free(&ashost->queues.disconnected); 2950e95a1b65SRussell King queue_free(&ashost->queues.issue); 2951e95a1b65SRussell King out_put: 2952e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 2953e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 29541da177e4SLinus Torvalds scsi_host_put(host); 2955e95a1b65SRussell King out_release: 2956e95a1b65SRussell King ecard_release_resources(ec); 29571da177e4SLinus Torvalds out: 29581da177e4SLinus Torvalds return ret; 29591da177e4SLinus Torvalds } 29601da177e4SLinus Torvalds 29616f039790SGreg Kroah-Hartman static void acornscsi_remove(struct expansion_card *ec) 29621da177e4SLinus Torvalds { 29631da177e4SLinus Torvalds struct Scsi_Host *host = ecard_get_drvdata(ec); 29641da177e4SLinus Torvalds AS_Host *ashost = (AS_Host *)host->hostdata; 29651da177e4SLinus Torvalds 29661da177e4SLinus Torvalds ecard_set_drvdata(ec, NULL); 29671da177e4SLinus Torvalds scsi_remove_host(host); 29681da177e4SLinus Torvalds 29691da177e4SLinus Torvalds /* 29701da177e4SLinus Torvalds * Put card into RESET state 29711da177e4SLinus Torvalds */ 2972e95a1b65SRussell King writeb(0x80, ashost->fast + PAGE_REG); 29731da177e4SLinus Torvalds 29741da177e4SLinus Torvalds free_irq(host->irq, ashost); 29751da177e4SLinus Torvalds 29761da177e4SLinus Torvalds msgqueue_free(&ashost->scsi.msgs); 29771da177e4SLinus Torvalds queue_free(&ashost->queues.disconnected); 29781da177e4SLinus Torvalds queue_free(&ashost->queues.issue); 2979e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 2980e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 29811da177e4SLinus Torvalds scsi_host_put(host); 2982e95a1b65SRussell King ecard_release_resources(ec); 29831da177e4SLinus Torvalds } 29841da177e4SLinus Torvalds 29851da177e4SLinus Torvalds static const struct ecard_id acornscsi_cids[] = { 29861da177e4SLinus Torvalds { MANU_ACORN, PROD_ACORN_SCSI }, 29871da177e4SLinus Torvalds { 0xffff, 0xffff }, 29881da177e4SLinus Torvalds }; 29891da177e4SLinus Torvalds 29901da177e4SLinus Torvalds static struct ecard_driver acornscsi_driver = { 29911da177e4SLinus Torvalds .probe = acornscsi_probe, 29926f039790SGreg Kroah-Hartman .remove = acornscsi_remove, 29931da177e4SLinus Torvalds .id_table = acornscsi_cids, 29941da177e4SLinus Torvalds .drv = { 29951da177e4SLinus Torvalds .name = "acornscsi", 29961da177e4SLinus Torvalds }, 29971da177e4SLinus Torvalds }; 29981da177e4SLinus Torvalds 29991da177e4SLinus Torvalds static int __init acornscsi_init(void) 30001da177e4SLinus Torvalds { 30011da177e4SLinus Torvalds return ecard_register_driver(&acornscsi_driver); 30021da177e4SLinus Torvalds } 30031da177e4SLinus Torvalds 30041da177e4SLinus Torvalds static void __exit acornscsi_exit(void) 30051da177e4SLinus Torvalds { 30061da177e4SLinus Torvalds ecard_remove_driver(&acornscsi_driver); 30071da177e4SLinus Torvalds } 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds module_init(acornscsi_init); 30101da177e4SLinus Torvalds module_exit(acornscsi_exit); 30111da177e4SLinus Torvalds 30121da177e4SLinus Torvalds MODULE_AUTHOR("Russell King"); 30131da177e4SLinus Torvalds MODULE_DESCRIPTION("AcornSCSI driver"); 30141da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 3015