1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * linux/drivers/acorn/scsi/acornscsi.c 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Acorn SCSI 3 driver 61da177e4SLinus Torvalds * By R.M.King. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Abandoned using the Select and Transfer command since there were 91da177e4SLinus Torvalds * some nasty races between our software and the target devices that 101da177e4SLinus Torvalds * were not easy to solve, and the device errata had a lot of entries 111da177e4SLinus Torvalds * for this command, some of them quite nasty... 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * Changelog: 141da177e4SLinus Torvalds * 26-Sep-1997 RMK Re-jigged to use the queue module. 151da177e4SLinus Torvalds * Re-coded state machine to be based on driver 161da177e4SLinus Torvalds * state not scsi state. Should be easier to debug. 171da177e4SLinus Torvalds * Added acornscsi_release to clean up properly. 181da177e4SLinus Torvalds * Updated proc/scsi reporting. 191da177e4SLinus Torvalds * 05-Oct-1997 RMK Implemented writing to SCSI devices. 201da177e4SLinus Torvalds * 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/ 211da177e4SLinus Torvalds * reconnect race condition causing a warning message. 221da177e4SLinus Torvalds * 12-Oct-1997 RMK Added catch for re-entering interrupt routine. 231da177e4SLinus Torvalds * 15-Oct-1997 RMK Improved handling of commands. 241da177e4SLinus Torvalds * 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h. 251da177e4SLinus Torvalds * 13-Dec-1998 RMK Better abort code and command handling. Extra state 261da177e4SLinus Torvalds * transitions added to allow dodgy devices to work. 271da177e4SLinus Torvalds */ 281da177e4SLinus Torvalds #define DEBUG_NO_WRITE 1 291da177e4SLinus Torvalds #define DEBUG_QUEUES 2 301da177e4SLinus Torvalds #define DEBUG_DMA 4 311da177e4SLinus Torvalds #define DEBUG_ABORT 8 321da177e4SLinus Torvalds #define DEBUG_DISCON 16 331da177e4SLinus Torvalds #define DEBUG_CONNECT 32 341da177e4SLinus Torvalds #define DEBUG_PHASES 64 351da177e4SLinus Torvalds #define DEBUG_WRITE 128 361da177e4SLinus Torvalds #define DEBUG_LINK 256 371da177e4SLinus Torvalds #define DEBUG_MESSAGES 512 381da177e4SLinus Torvalds #define DEBUG_RESET 1024 391da177e4SLinus Torvalds #define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\ 401da177e4SLinus Torvalds DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\ 411da177e4SLinus Torvalds DEBUG_DMA|DEBUG_QUEUES) 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds /* DRIVER CONFIGURATION 441da177e4SLinus Torvalds * 451da177e4SLinus Torvalds * SCSI-II Tagged queue support. 461da177e4SLinus Torvalds * 471da177e4SLinus Torvalds * I don't have any SCSI devices that support it, so it is totally untested 481da177e4SLinus Torvalds * (except to make sure that it doesn't interfere with any non-tagging 491da177e4SLinus Torvalds * devices). It is not fully implemented either - what happens when a 501da177e4SLinus Torvalds * tagging device reconnects??? 511da177e4SLinus Torvalds * 521da177e4SLinus Torvalds * You can tell if you have a device that supports tagged queueing my 531da177e4SLinus Torvalds * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported 541da177e4SLinus Torvalds * as '2 TAG'. 551da177e4SLinus Torvalds * 561da177e4SLinus Torvalds * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config 571da177e4SLinus Torvalds * scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug, 581da177e4SLinus Torvalds * comment out the undef. 591da177e4SLinus Torvalds */ 601da177e4SLinus Torvalds #undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 611da177e4SLinus Torvalds /* 621da177e4SLinus Torvalds * SCSI-II Synchronous transfer support. 631da177e4SLinus Torvalds * 641da177e4SLinus Torvalds * Tried and tested... 651da177e4SLinus Torvalds * 661da177e4SLinus Torvalds * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) 671da177e4SLinus Torvalds * SDTR_PERIOD - period of REQ signal (min=125, max=1020) 681da177e4SLinus Torvalds * DEFAULT_PERIOD - default REQ period. 691da177e4SLinus Torvalds */ 701da177e4SLinus Torvalds #define SDTR_SIZE 12 711da177e4SLinus Torvalds #define SDTR_PERIOD 125 721da177e4SLinus Torvalds #define DEFAULT_PERIOD 500 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds /* 751da177e4SLinus Torvalds * Debugging information 761da177e4SLinus Torvalds * 771da177e4SLinus Torvalds * DEBUG - bit mask from list above 781da177e4SLinus Torvalds * DEBUG_TARGET - is defined to the target number if you want to debug 791da177e4SLinus Torvalds * a specific target. [only recon/write/dma]. 801da177e4SLinus Torvalds */ 811da177e4SLinus Torvalds #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) 821da177e4SLinus Torvalds /* only allow writing to SCSI device 0 */ 831da177e4SLinus Torvalds #define NO_WRITE 0xFE 841da177e4SLinus Torvalds /*#define DEBUG_TARGET 2*/ 851da177e4SLinus Torvalds /* 861da177e4SLinus Torvalds * Select timeout time (in 10ms units) 871da177e4SLinus Torvalds * 881da177e4SLinus Torvalds * This is the timeout used between the start of selection and the WD33C93 891da177e4SLinus Torvalds * chip deciding that the device isn't responding. 901da177e4SLinus Torvalds */ 911da177e4SLinus Torvalds #define TIMEOUT_TIME 10 921da177e4SLinus Torvalds /* 9325985edcSLucas De Marchi * Define this if you want to have verbose explanation of SCSI 941da177e4SLinus Torvalds * status/messages. 951da177e4SLinus Torvalds */ 961da177e4SLinus Torvalds #undef CONFIG_ACORNSCSI_CONSTANTS 971da177e4SLinus Torvalds /* 981da177e4SLinus Torvalds * Define this if you want to use the on board DMAC [don't remove this option] 991da177e4SLinus Torvalds * If not set, then use PIO mode (not currently supported). 1001da177e4SLinus Torvalds */ 1011da177e4SLinus Torvalds #define USE_DMAC 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* 1041da177e4SLinus Torvalds * ==================================================================================== 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds #ifdef DEBUG_TARGET 1081da177e4SLinus Torvalds #define DBG(cmd,xxx...) \ 1091da177e4SLinus Torvalds if (cmd->device->id == DEBUG_TARGET) { \ 1101da177e4SLinus Torvalds xxx; \ 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds #else 1131da177e4SLinus Torvalds #define DBG(cmd,xxx...) xxx 1141da177e4SLinus Torvalds #endif 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds #include <linux/module.h> 1171da177e4SLinus Torvalds #include <linux/kernel.h> 1181da177e4SLinus Torvalds #include <linux/string.h> 1191da177e4SLinus Torvalds #include <linux/signal.h> 1201da177e4SLinus Torvalds #include <linux/errno.h> 1211da177e4SLinus Torvalds #include <linux/proc_fs.h> 1221da177e4SLinus Torvalds #include <linux/ioport.h> 1231da177e4SLinus Torvalds #include <linux/blkdev.h> 1241da177e4SLinus Torvalds #include <linux/delay.h> 1251da177e4SLinus Torvalds #include <linux/interrupt.h> 1261da177e4SLinus Torvalds #include <linux/init.h> 1271da177e4SLinus Torvalds #include <linux/bitops.h> 128a796ef70SRussell King #include <linux/stringify.h> 129e95a1b65SRussell King #include <linux/io.h> 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds #include <asm/ecard.h> 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds #include "../scsi.h" 134db9dff36S #include <scsi/scsi_dbg.h> 1351da177e4SLinus Torvalds #include <scsi/scsi_host.h> 1361abfd370SMatthew Wilcox #include <scsi/scsi_transport_spi.h> 1371da177e4SLinus Torvalds #include "acornscsi.h" 1381da177e4SLinus Torvalds #include "msgqueue.h" 1391da177e4SLinus Torvalds #include "scsi.h" 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds #include <scsi/scsicam.h> 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds #define VER_MAJOR 2 1441da177e4SLinus Torvalds #define VER_MINOR 0 1451da177e4SLinus Torvalds #define VER_PATCH 6 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds #ifndef ABORT_TAG 1481da177e4SLinus Torvalds #define ABORT_TAG 0xd 1491da177e4SLinus Torvalds #else 1501da177e4SLinus Torvalds #error "Yippee! ABORT TAG is now defined! Remove this error!" 1511da177e4SLinus Torvalds #endif 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds #ifdef USE_DMAC 1541da177e4SLinus Torvalds /* 1551da177e4SLinus Torvalds * DMAC setup parameters 1561da177e4SLinus Torvalds */ 1571da177e4SLinus Torvalds #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) 1581da177e4SLinus Torvalds #define INIT_DEVCON1 (DEVCON1_BHLD) 1591da177e4SLinus Torvalds #define DMAC_READ (MODECON_READ) 1601da177e4SLinus Torvalds #define DMAC_WRITE (MODECON_WRITE) 1611da177e4SLinus Torvalds #define INIT_SBICDMA (CTRL_DMABURST) 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds #define scsi_xferred have_data_in 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* 1661da177e4SLinus Torvalds * Size of on-board DMA buffer 1671da177e4SLinus Torvalds */ 1681da177e4SLinus Torvalds #define DMAC_BUFFER_SIZE 65536 1691da177e4SLinus Torvalds #endif 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds #define STATUS_BUFFER_TO_PRINT 24 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds unsigned int sdtr_period = SDTR_PERIOD; 1741da177e4SLinus Torvalds unsigned int sdtr_size = SDTR_SIZE; 1751da177e4SLinus Torvalds 176ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 177ee0ca6baSHenne unsigned int result); 1781da177e4SLinus Torvalds static int acornscsi_reconnect_finish(AS_Host *host); 1791da177e4SLinus Torvalds static void acornscsi_dma_cleanup(AS_Host *host); 1801da177e4SLinus Torvalds static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds /* ==================================================================================== 1831da177e4SLinus Torvalds * Miscellaneous 1841da177e4SLinus Torvalds */ 1851da177e4SLinus Torvalds 186e95a1b65SRussell King /* Offsets from MEMC base */ 187e95a1b65SRussell King #define SBIC_REGIDX 0x2000 188e95a1b65SRussell King #define SBIC_REGVAL 0x2004 189e95a1b65SRussell King #define DMAC_OFFSET 0x3000 190e95a1b65SRussell King 191e95a1b65SRussell King /* Offsets from FAST IOC base */ 192e95a1b65SRussell King #define INT_REG 0x2000 193e95a1b65SRussell King #define PAGE_REG 0x3000 194e95a1b65SRussell King 195ffd7858dSRussell King static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value) 1961da177e4SLinus Torvalds { 197e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 198e95a1b65SRussell King writeb(value, host->base + SBIC_REGVAL); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 201ffd7858dSRussell King static inline int sbic_arm_read(AS_Host *host, unsigned int reg) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds if(reg == SBIC_ASR) 204e95a1b65SRussell King return readl(host->base + SBIC_REGIDX) & 255; 205e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX); 206e95a1b65SRussell King return readl(host->base + SBIC_REGVAL) & 255; 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds 209e95a1b65SRussell King #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL) 210e95a1b65SRussell King #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL) 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds #ifdef USE_DMAC 213ffd7858dSRussell King #define dmac_read(host,reg) \ 214e95a1b65SRussell King readb((host)->base + DMAC_OFFSET + ((reg) << 2)) 2151da177e4SLinus Torvalds 216ffd7858dSRussell King #define dmac_write(host,reg,value) \ 217e95a1b65SRussell King ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); }) 2181da177e4SLinus Torvalds 219e95a1b65SRussell King #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG) 2201da177e4SLinus Torvalds 221ffd7858dSRussell King static inline unsigned int dmac_address(AS_Host *host) 2221da177e4SLinus Torvalds { 223ffd7858dSRussell King return dmac_read(host, DMAC_TXADRHI) << 16 | 224ffd7858dSRussell King dmac_read(host, DMAC_TXADRMD) << 8 | 225ffd7858dSRussell King dmac_read(host, DMAC_TXADRLO); 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds static 2291da177e4SLinus Torvalds void acornscsi_dumpdma(AS_Host *host, char *where) 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds unsigned int mode, addr, len; 2321da177e4SLinus Torvalds 233ffd7858dSRussell King mode = dmac_read(host, DMAC_MODECON); 234ffd7858dSRussell King addr = dmac_address(host); 235ffd7858dSRussell King len = dmac_read(host, DMAC_TXCNTHI) << 8 | 236ffd7858dSRussell King dmac_read(host, DMAC_TXCNTLO); 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", 2391da177e4SLinus Torvalds host->host->host_no, where, 2401da177e4SLinus Torvalds mode, addr, (len + 1) & 0xffff, 241ffd7858dSRussell King dmac_read(host, DMAC_MASKREG)); 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds printk("DMA @%06x, ", host->dma.start_addr); 2441da177e4SLinus Torvalds printk("BH @%p +%04x, ", host->scsi.SCp.ptr, 2451da177e4SLinus Torvalds host->scsi.SCp.this_residual); 2461da177e4SLinus Torvalds printk("DT @+%04x ST @+%04x", host->dma.transferred, 2471da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred); 2481da177e4SLinus Torvalds printk("\n"); 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds #endif 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds static 2531da177e4SLinus Torvalds unsigned long acornscsi_sbic_xfcount(AS_Host *host) 2541da177e4SLinus Torvalds { 2551da177e4SLinus Torvalds unsigned long length; 2561da177e4SLinus Torvalds 257ffd7858dSRussell King length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16; 258ffd7858dSRussell King length |= sbic_arm_readnext(host) << 8; 259ffd7858dSRussell King length |= sbic_arm_readnext(host); 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds return length; 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds static int 2651da177e4SLinus Torvalds acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds int asr; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds do { 270ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds if ((asr & stat_mask) == stat) 2731da177e4SLinus Torvalds return 0; 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds udelay(1); 2761da177e4SLinus Torvalds } while (--timeout); 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds printk("scsi%d: timeout while %s\n", host->host->host_no, msg); 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds return -1; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds static 2841da177e4SLinus Torvalds int acornscsi_sbic_issuecmd(AS_Host *host, int command) 2851da177e4SLinus Torvalds { 2861da177e4SLinus Torvalds if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) 2871da177e4SLinus Torvalds return -1; 2881da177e4SLinus Torvalds 289ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, command); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds return 0; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds static void 2951da177e4SLinus Torvalds acornscsi_csdelay(unsigned int cs) 2961da177e4SLinus Torvalds { 2971da177e4SLinus Torvalds unsigned long target_jiffies, flags; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds target_jiffies = jiffies + 1 + cs * HZ / 100; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds local_save_flags(flags); 3021da177e4SLinus Torvalds local_irq_enable(); 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds while (time_before(jiffies, target_jiffies)) barrier(); 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds local_irq_restore(flags); 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds static 3101da177e4SLinus Torvalds void acornscsi_resetcard(AS_Host *host) 3111da177e4SLinus Torvalds { 3121da177e4SLinus Torvalds unsigned int i, timeout; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds /* assert reset line */ 3151da177e4SLinus Torvalds host->card.page_reg = 0x80; 316e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds /* wait 3 cs. SCSI standard says 25ms. */ 3191da177e4SLinus Torvalds acornscsi_csdelay(3); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds host->card.page_reg = 0; 322e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds /* 3251da177e4SLinus Torvalds * Should get a reset from the card 3261da177e4SLinus Torvalds */ 3271da177e4SLinus Torvalds timeout = 1000; 3281da177e4SLinus Torvalds do { 329e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3301da177e4SLinus Torvalds break; 3311da177e4SLinus Torvalds udelay(1); 3321da177e4SLinus Torvalds } while (--timeout); 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds if (timeout == 0) 3351da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3361da177e4SLinus Torvalds host->host->host_no); 3371da177e4SLinus Torvalds 338ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 339ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 342ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 343ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds /* 3461da177e4SLinus Torvalds * Command should cause a reset interrupt 3471da177e4SLinus Torvalds */ 3481da177e4SLinus Torvalds timeout = 1000; 3491da177e4SLinus Torvalds do { 350e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8) 3511da177e4SLinus Torvalds break; 3521da177e4SLinus Torvalds udelay(1); 3531da177e4SLinus Torvalds } while (--timeout); 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds if (timeout == 0) 3561da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n", 3571da177e4SLinus Torvalds host->host->host_no); 3581da177e4SLinus Torvalds 359ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR); 360ffd7858dSRussell King if (sbic_arm_read(host, SBIC_SSR) != 0x01) 3611da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", 3621da177e4SLinus Torvalds host->host->host_no); 3631da177e4SLinus Torvalds 364ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 365ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 366ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 367ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds host->card.page_reg = 0x40; 370e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds /* setup dmac - uPC71071 */ 373ffd7858dSRussell King dmac_write(host, DMAC_INIT, 0); 3741da177e4SLinus Torvalds #ifdef USE_DMAC 375ffd7858dSRussell King dmac_write(host, DMAC_INIT, INIT_8BIT); 376ffd7858dSRussell King dmac_write(host, DMAC_CHANNEL, CHANNEL_0); 377ffd7858dSRussell King dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0); 378ffd7858dSRussell King dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1); 3791da177e4SLinus Torvalds #endif 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds host->SCpnt = NULL; 3821da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 3831da177e4SLinus Torvalds host->scsi.disconnectable = 0; 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds memset(host->busyluns, 0, sizeof(host->busyluns)); 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds for (i = 0; i < 8; i++) { 3881da177e4SLinus Torvalds host->device[i].sync_state = SYNC_NEGOCIATE; 3891da177e4SLinus Torvalds host->device[i].disconnect_ok = 1; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* wait 25 cs. SCSI standard says 250ms. */ 3931da177e4SLinus Torvalds acornscsi_csdelay(25); 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds /*============================================================================================= 3971da177e4SLinus Torvalds * Utility routines (eg. debug) 3981da177e4SLinus Torvalds */ 3991da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4001da177e4SLinus Torvalds static char *acornscsi_interrupttype[] = { 4011da177e4SLinus Torvalds "rst", "suc", "p/a", "3", 4021da177e4SLinus Torvalds "term", "5", "6", "7", 4031da177e4SLinus Torvalds "serv", "9", "a", "b", 4041da177e4SLinus Torvalds "c", "d", "e", "f" 4051da177e4SLinus Torvalds }; 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds static signed char acornscsi_map[] = { 4081da177e4SLinus Torvalds 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4091da177e4SLinus Torvalds -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4101da177e4SLinus Torvalds 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 4111da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4121da177e4SLinus Torvalds 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, 4131da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4141da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4151da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4161da177e4SLinus Torvalds 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 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 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 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 }; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds static char *acornscsi_interruptcode[] = { 4271da177e4SLinus Torvalds /* 0 */ 4281da177e4SLinus Torvalds "reset - normal mode", /* 00 */ 4291da177e4SLinus Torvalds "reset - advanced mode", /* 01 */ 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds /* 2 */ 4321da177e4SLinus Torvalds "sel", /* 11 */ 4331da177e4SLinus Torvalds "sel+xfer", /* 16 */ 4341da177e4SLinus Torvalds "data-out", /* 18 */ 4351da177e4SLinus Torvalds "data-in", /* 19 */ 4361da177e4SLinus Torvalds "cmd", /* 1A */ 4371da177e4SLinus Torvalds "stat", /* 1B */ 4381da177e4SLinus Torvalds "??-out", /* 1C */ 4391da177e4SLinus Torvalds "??-in", /* 1D */ 4401da177e4SLinus Torvalds "msg-out", /* 1E */ 4411da177e4SLinus Torvalds "msg-in", /* 1F */ 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds /* 12 */ 4441da177e4SLinus Torvalds "/ACK asserted", /* 20 */ 4451da177e4SLinus Torvalds "save-data-ptr", /* 21 */ 4461da177e4SLinus Torvalds "{re}sel", /* 22 */ 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* 15 */ 4491da177e4SLinus Torvalds "inv cmd", /* 40 */ 4501da177e4SLinus Torvalds "unexpected disconnect", /* 41 */ 4511da177e4SLinus Torvalds "sel timeout", /* 42 */ 4521da177e4SLinus Torvalds "P err", /* 43 */ 4531da177e4SLinus Torvalds "P err+ATN", /* 44 */ 4541da177e4SLinus Torvalds "bad status byte", /* 47 */ 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds /* 21 */ 4571da177e4SLinus Torvalds "resel, no id", /* 80 */ 4581da177e4SLinus Torvalds "resel", /* 81 */ 4591da177e4SLinus Torvalds "discon", /* 85 */ 4601da177e4SLinus Torvalds }; 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds static 4631da177e4SLinus Torvalds void print_scsi_status(unsigned int ssr) 4641da177e4SLinus Torvalds { 4651da177e4SLinus Torvalds if (acornscsi_map[ssr] != -1) 4661da177e4SLinus Torvalds printk("%s:%s", 4671da177e4SLinus Torvalds acornscsi_interrupttype[(ssr >> 4)], 4681da177e4SLinus Torvalds acornscsi_interruptcode[acornscsi_map[ssr]]); 4691da177e4SLinus Torvalds else 4701da177e4SLinus Torvalds printk("%X:%X", ssr >> 4, ssr & 0x0f); 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds #endif 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds static 4751da177e4SLinus Torvalds void print_sbic_status(int asr, int ssr, int cmdphase) 4761da177e4SLinus Torvalds { 4771da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS 4781da177e4SLinus Torvalds printk("sbic: %c%c%c%c%c%c ", 4791da177e4SLinus Torvalds asr & ASR_INT ? 'I' : 'i', 4801da177e4SLinus Torvalds asr & ASR_LCI ? 'L' : 'l', 4811da177e4SLinus Torvalds asr & ASR_BSY ? 'B' : 'b', 4821da177e4SLinus Torvalds asr & ASR_CIP ? 'C' : 'c', 4831da177e4SLinus Torvalds asr & ASR_PE ? 'P' : 'p', 4841da177e4SLinus Torvalds asr & ASR_DBR ? 'D' : 'd'); 4851da177e4SLinus Torvalds printk("scsi: "); 4861da177e4SLinus Torvalds print_scsi_status(ssr); 4871da177e4SLinus Torvalds printk(" ph %02X\n", cmdphase); 4881da177e4SLinus Torvalds #else 4891da177e4SLinus Torvalds printk("sbic: %02X scsi: %X:%X ph: %02X\n", 4901da177e4SLinus Torvalds asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); 4911da177e4SLinus Torvalds #endif 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds static void 4951da177e4SLinus Torvalds acornscsi_dumplogline(AS_Host *host, int target, int line) 4961da177e4SLinus Torvalds { 4971da177e4SLinus Torvalds unsigned long prev; 4981da177e4SLinus Torvalds signed int ptr; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; 5011da177e4SLinus Torvalds if (ptr < 0) 5021da177e4SLinus Torvalds ptr += STATUS_BUFFER_SIZE; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds printk("%c: %3s:", target == 8 ? 'H' : '0' + target, 5051da177e4SLinus Torvalds line == 0 ? "ph" : line == 1 ? "ssr" : "int"); 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 5101da177e4SLinus Torvalds unsigned long time_diff; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds if (!host->status[target][ptr].when) 5131da177e4SLinus Torvalds continue; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds switch (line) { 5161da177e4SLinus Torvalds case 0: 5171da177e4SLinus Torvalds printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', 5181da177e4SLinus Torvalds host->status[target][ptr].ph); 5191da177e4SLinus Torvalds break; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds case 1: 5221da177e4SLinus Torvalds printk(" %02X", host->status[target][ptr].ssr); 5231da177e4SLinus Torvalds break; 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds case 2: 5261da177e4SLinus Torvalds time_diff = host->status[target][ptr].when - prev; 5271da177e4SLinus Torvalds prev = host->status[target][ptr].when; 5281da177e4SLinus Torvalds if (time_diff == 0) 5291da177e4SLinus Torvalds printk("==^"); 5301da177e4SLinus Torvalds else if (time_diff >= 100) 5311da177e4SLinus Torvalds printk(" "); 5321da177e4SLinus Torvalds else 5331da177e4SLinus Torvalds printk(" %02ld", time_diff); 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds printk("\n"); 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds static 5421da177e4SLinus Torvalds void acornscsi_dumplog(AS_Host *host, int target) 5431da177e4SLinus Torvalds { 5441da177e4SLinus Torvalds do { 5451da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 0); 5461da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 1); 5471da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 2); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds if (target == 8) 5501da177e4SLinus Torvalds break; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds target = 8; 5531da177e4SLinus Torvalds } while (1); 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds static 5571da177e4SLinus Torvalds char acornscsi_target(AS_Host *host) 5581da177e4SLinus Torvalds { 5591da177e4SLinus Torvalds if (host->SCpnt) 5601da177e4SLinus Torvalds return '0' + host->SCpnt->device->id; 5611da177e4SLinus Torvalds return 'H'; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds /* 5651da177e4SLinus Torvalds * Prototype: cmdtype_t acornscsi_cmdtype(int command) 5661da177e4SLinus Torvalds * Purpose : differentiate READ from WRITE from other commands 5671da177e4SLinus Torvalds * Params : command - command to interpret 5681da177e4SLinus Torvalds * Returns : CMD_READ - command reads data, 5691da177e4SLinus Torvalds * CMD_WRITE - command writes data, 5701da177e4SLinus Torvalds * CMD_MISC - everything else 5711da177e4SLinus Torvalds */ 5721da177e4SLinus Torvalds static inline 5731da177e4SLinus Torvalds cmdtype_t acornscsi_cmdtype(int command) 5741da177e4SLinus Torvalds { 5751da177e4SLinus Torvalds switch (command) { 5761da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_12: 5771da177e4SLinus Torvalds return CMD_WRITE; 5781da177e4SLinus Torvalds case READ_6: case READ_10: case READ_12: 5791da177e4SLinus Torvalds return CMD_READ; 5801da177e4SLinus Torvalds default: 5811da177e4SLinus Torvalds return CMD_MISC; 5821da177e4SLinus Torvalds } 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds /* 5861da177e4SLinus Torvalds * Prototype: int acornscsi_datadirection(int command) 5871da177e4SLinus Torvalds * Purpose : differentiate between commands that have a DATA IN phase 5881da177e4SLinus Torvalds * and a DATA OUT phase 5891da177e4SLinus Torvalds * Params : command - command to interpret 5901da177e4SLinus Torvalds * Returns : DATADIR_OUT - data out phase expected 5911da177e4SLinus Torvalds * DATADIR_IN - data in phase expected 5921da177e4SLinus Torvalds */ 5931da177e4SLinus Torvalds static 5941da177e4SLinus Torvalds datadir_t acornscsi_datadirection(int command) 5951da177e4SLinus Torvalds { 5961da177e4SLinus Torvalds switch (command) { 5971da177e4SLinus Torvalds case CHANGE_DEFINITION: case COMPARE: case COPY: 5981da177e4SLinus Torvalds case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: 5991da177e4SLinus Torvalds case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: 6001da177e4SLinus Torvalds case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: 6011da177e4SLinus Torvalds case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: 6021da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_VERIFY: 6031da177e4SLinus Torvalds case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: 6041da177e4SLinus Torvalds case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: 6051da177e4SLinus Torvalds case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: 6061da177e4SLinus Torvalds case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: 6071da177e4SLinus Torvalds return DATADIR_OUT; 6081da177e4SLinus Torvalds default: 6091da177e4SLinus Torvalds return DATADIR_IN; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds /* 6141da177e4SLinus Torvalds * Purpose : provide values for synchronous transfers with 33C93. 6151da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6161da177e4SLinus Torvalds * Modified by Russell King for 8MHz WD33C93A 6171da177e4SLinus Torvalds */ 6181da177e4SLinus Torvalds static struct sync_xfer_tbl { 6191da177e4SLinus Torvalds unsigned int period_ns; 6201da177e4SLinus Torvalds unsigned char reg_value; 6211da177e4SLinus Torvalds } sync_xfer_table[] = { 6221da177e4SLinus Torvalds { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, 6231da177e4SLinus Torvalds { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, 6241da177e4SLinus Torvalds { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } 6251da177e4SLinus Torvalds }; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* 6281da177e4SLinus Torvalds * Prototype: int acornscsi_getperiod(unsigned char syncxfer) 6291da177e4SLinus Torvalds * Purpose : period for the synchronous transfer setting 6301da177e4SLinus Torvalds * Params : syncxfer SYNCXFER register value 6311da177e4SLinus Torvalds * Returns : period in ns. 6321da177e4SLinus Torvalds */ 6331da177e4SLinus Torvalds static 6341da177e4SLinus Torvalds int acornscsi_getperiod(unsigned char syncxfer) 6351da177e4SLinus Torvalds { 6361da177e4SLinus Torvalds int i; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds syncxfer &= 0xf0; 6391da177e4SLinus Torvalds if (syncxfer == 0x10) 6401da177e4SLinus Torvalds syncxfer = 0; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) 6431da177e4SLinus Torvalds if (syncxfer == sync_xfer_table[i].reg_value) 6441da177e4SLinus Torvalds return sync_xfer_table[i].period_ns; 6451da177e4SLinus Torvalds return 0; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds /* 6491da177e4SLinus Torvalds * Prototype: int round_period(unsigned int period) 6501da177e4SLinus Torvalds * Purpose : return index into above table for a required REQ period 6511da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6521da177e4SLinus Torvalds * Returns : table index 6531da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6541da177e4SLinus Torvalds */ 6551da177e4SLinus Torvalds static inline 6561da177e4SLinus Torvalds int round_period(unsigned int period) 6571da177e4SLinus Torvalds { 6581da177e4SLinus Torvalds int i; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) { 6611da177e4SLinus Torvalds if ((period <= sync_xfer_table[i].period_ns) && 6621da177e4SLinus Torvalds (period > sync_xfer_table[i - 1].period_ns)) 6631da177e4SLinus Torvalds return i; 6641da177e4SLinus Torvalds } 6651da177e4SLinus Torvalds return 7; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* 6691da177e4SLinus Torvalds * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 6701da177e4SLinus Torvalds * Purpose : calculate value for 33c93s SYNC register 6711da177e4SLinus Torvalds * Params : period - time (ns) for REQ 6721da177e4SLinus Torvalds * offset - offset in bytes between REQ/ACK 6731da177e4SLinus Torvalds * Returns : value for SYNC register 6741da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 6751da177e4SLinus Torvalds */ 6761da177e4SLinus Torvalds static 6776fea7f6fSArnd Bergmann unsigned char __maybe_unused calc_sync_xfer(unsigned int period, 6786fea7f6fSArnd Bergmann unsigned int offset) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds return sync_xfer_table[round_period(period)].reg_value | 6811da177e4SLinus Torvalds ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds /* ==================================================================================== 6851da177e4SLinus Torvalds * Command functions 6861da177e4SLinus Torvalds */ 6871da177e4SLinus Torvalds /* 6881da177e4SLinus Torvalds * Function: acornscsi_kick(AS_Host *host) 6891da177e4SLinus Torvalds * Purpose : kick next command to interface 6901da177e4SLinus Torvalds * Params : host - host to send command to 6911da177e4SLinus Torvalds * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING 6921da177e4SLinus Torvalds * Notes : interrupts are always disabled! 6931da177e4SLinus Torvalds */ 6941da177e4SLinus Torvalds static 6951da177e4SLinus Torvalds intr_ret_t acornscsi_kick(AS_Host *host) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds int from_queue = 0; 698ee0ca6baSHenne struct scsi_cmnd *SCpnt; 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds /* first check to see if a command is waiting to be executed */ 7011da177e4SLinus Torvalds SCpnt = host->origSCpnt; 7021da177e4SLinus Torvalds host->origSCpnt = NULL; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds /* retrieve next command */ 7051da177e4SLinus Torvalds if (!SCpnt) { 7061da177e4SLinus Torvalds SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); 7071da177e4SLinus Torvalds if (!SCpnt) 7081da177e4SLinus Torvalds return INTR_IDLE; 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds from_queue = 1; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 7141da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 7151da177e4SLinus Torvalds host->scsi.disconnectable = 0; 7161da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 7171da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", 7181da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 7191da177e4SLinus Torvalds #endif 7201da177e4SLinus Torvalds host->SCpnt = NULL; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds /* 7241da177e4SLinus Torvalds * If we have an interrupt pending, then we may have been reselected. 7251da177e4SLinus Torvalds * In this case, we don't want to write to the registers 7261da177e4SLinus Torvalds */ 727ffd7858dSRussell King if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { 728ffd7858dSRussell King sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id); 729ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN); 7301da177e4SLinus Torvalds } 7311da177e4SLinus Torvalds 7321da177e4SLinus Torvalds /* 7331da177e4SLinus Torvalds * claim host busy - all of these must happen atomically wrt 7341da177e4SLinus Torvalds * our interrupt routine. Failure means command loss. 7351da177e4SLinus Torvalds */ 7361da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTING; 7371da177e4SLinus Torvalds host->SCpnt = SCpnt; 7381da177e4SLinus Torvalds host->scsi.SCp = SCpnt->SCp; 7391da177e4SLinus Torvalds host->dma.xfer_setup = 0; 7401da177e4SLinus Torvalds host->dma.xfer_required = 0; 7411da177e4SLinus Torvalds host->dma.xfer_done = 0; 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) 7441da177e4SLinus Torvalds DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", 7451da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id, 7461da177e4SLinus Torvalds SCpnt->cmnd[0])); 7471da177e4SLinus Torvalds #endif 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds if (from_queue) { 7501da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 7511da177e4SLinus Torvalds /* 7521da177e4SLinus Torvalds * tagged queueing - allocate a new tag to this command 7531da177e4SLinus Torvalds */ 7541da177e4SLinus Torvalds if (SCpnt->device->simple_tags) { 7551da177e4SLinus Torvalds SCpnt->device->current_tag += 1; 7561da177e4SLinus Torvalds if (SCpnt->device->current_tag == 0) 7571da177e4SLinus Torvalds SCpnt->device->current_tag = 1; 7581da177e4SLinus Torvalds SCpnt->tag = SCpnt->device->current_tag; 7591da177e4SLinus Torvalds } else 7601da177e4SLinus Torvalds #endif 7619cb78c16SHannes Reinecke set_bit(SCpnt->device->id * 8 + 7629cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x07), host->busyluns); 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds host->stats.removes += 1; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { 7671da177e4SLinus Torvalds case CMD_WRITE: 7681da177e4SLinus Torvalds host->stats.writes += 1; 7691da177e4SLinus Torvalds break; 7701da177e4SLinus Torvalds case CMD_READ: 7711da177e4SLinus Torvalds host->stats.reads += 1; 7721da177e4SLinus Torvalds break; 7731da177e4SLinus Torvalds case CMD_MISC: 7741da177e4SLinus Torvalds host->stats.miscs += 1; 7751da177e4SLinus Torvalds break; 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds return INTR_PROCESSING; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds /* 783ee0ca6baSHenne * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result) 7841da177e4SLinus Torvalds * Purpose : complete processing for command 7851da177e4SLinus Torvalds * Params : host - interface that completed 7861da177e4SLinus Torvalds * result - driver byte of result 7871da177e4SLinus Torvalds */ 788ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 789ee0ca6baSHenne unsigned int result) 7901da177e4SLinus Torvalds { 791ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds /* clean up */ 794ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds host->stats.fins += 1; 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds if (SCpnt) { 7991da177e4SLinus Torvalds *SCpntp = NULL; 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds /* 8061da177e4SLinus Torvalds * In theory, this should not happen. In practice, it seems to. 8071da177e4SLinus Torvalds * Only trigger an error if the device attempts to report all happy 8081da177e4SLinus Torvalds * but with untransferred buffers... If we don't do something, then 8091da177e4SLinus Torvalds * data loss will occur. Should we check SCpnt->underflow here? 8101da177e4SLinus Torvalds * It doesn't appear to be set to something meaningful by the higher 8111da177e4SLinus Torvalds * levels all the time. 8121da177e4SLinus Torvalds */ 8131da177e4SLinus Torvalds if (result == DID_OK) { 8141da177e4SLinus Torvalds int xfer_warn = 0; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds if (SCpnt->underflow == 0) { 8171da177e4SLinus Torvalds if (host->scsi.SCp.ptr && 8181da177e4SLinus Torvalds acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) 8191da177e4SLinus Torvalds xfer_warn = 1; 8201da177e4SLinus Torvalds } else { 8211da177e4SLinus Torvalds if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || 8221da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred != host->dma.transferred) 8231da177e4SLinus Torvalds xfer_warn = 1; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) 8271da177e4SLinus Torvalds * Targets which break data transfers into multiple 8281da177e4SLinus Torvalds * connections shall end each successful connection 8291da177e4SLinus Torvalds * (except possibly the last) with a SAVE DATA 8301da177e4SLinus Torvalds * POINTER - DISCONNECT message sequence. 8311da177e4SLinus Torvalds * 8321da177e4SLinus Torvalds * This makes it difficult to ensure that a transfer has 8331da177e4SLinus Torvalds * completed. If we reach the end of a transfer during 8341da177e4SLinus Torvalds * the command, then we can only have finished the transfer. 8351da177e4SLinus Torvalds * therefore, if we seem to have some data remaining, this 8361da177e4SLinus Torvalds * is not a problem. 8371da177e4SLinus Torvalds */ 8381da177e4SLinus Torvalds if (host->dma.xfer_done) 8391da177e4SLinus Torvalds xfer_warn = 0; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds if (xfer_warn) { 8421da177e4SLinus Torvalds switch (status_byte(SCpnt->result)) { 8431da177e4SLinus Torvalds case CHECK_CONDITION: 8441da177e4SLinus Torvalds case COMMAND_TERMINATED: 8451da177e4SLinus Torvalds case BUSY: 8461da177e4SLinus Torvalds case QUEUE_FULL: 8471da177e4SLinus Torvalds case RESERVATION_CONFLICT: 8481da177e4SLinus Torvalds break; 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds default: 8512e120a57SHannes Reinecke scmd_printk(KERN_ERR, SCpnt, 8522e120a57SHannes Reinecke "incomplete data transfer detected: " 8532e120a57SHannes Reinecke "result=%08X", SCpnt->result); 8542e120a57SHannes Reinecke scsi_print_command(SCpnt); 8551da177e4SLinus Torvalds acornscsi_dumpdma(host, "done"); 8561da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 8572e120a57SHannes Reinecke set_host_byte(SCpnt, DID_ERROR); 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds if (!SCpnt->scsi_done) 8631da177e4SLinus Torvalds panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); 8641da177e4SLinus Torvalds 8659cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 + 8669cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns); 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 8691da177e4SLinus Torvalds } else 8701da177e4SLinus Torvalds printk("scsi%d: null command in acornscsi_done", host->host->host_no); 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds /* ==================================================================================== 8761da177e4SLinus Torvalds * DMA routines 8771da177e4SLinus Torvalds */ 8781da177e4SLinus Torvalds /* 8791da177e4SLinus Torvalds * Purpose : update SCSI Data Pointer 8801da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 8811da177e4SLinus Torvalds */ 8821da177e4SLinus Torvalds static 8830a04137eSChristoph Hellwig void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length) 8841da177e4SLinus Torvalds { 8851da177e4SLinus Torvalds SCp->ptr += length; 8861da177e4SLinus Torvalds SCp->this_residual -= length; 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds if (SCp->this_residual == 0 && next_SCp(SCp) == 0) 8891da177e4SLinus Torvalds host->dma.xfer_done = 1; 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds /* 8931da177e4SLinus Torvalds * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, 8941da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 8951da177e4SLinus Torvalds * Purpose : read data from DMA RAM 8961da177e4SLinus Torvalds * Params : host - host to transfer from 8971da177e4SLinus Torvalds * ptr - DRAM address 8981da177e4SLinus Torvalds * start_addr - host mem address 8991da177e4SLinus Torvalds * length - number of bytes to transfer 9001da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9011da177e4SLinus Torvalds */ 9021da177e4SLinus Torvalds static 9031da177e4SLinus Torvalds void acornscsi_data_read(AS_Host *host, char *ptr, 9041da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9051da177e4SLinus Torvalds { 906e95a1b65SRussell King extern void __acornscsi_in(void __iomem *, char *buf, int len); 9071da177e4SLinus Torvalds unsigned int page, offset, len = length; 9081da177e4SLinus Torvalds 9091da177e4SLinus Torvalds page = (start_addr >> 12); 9101da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9111da177e4SLinus Torvalds 912e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9131da177e4SLinus Torvalds 9141da177e4SLinus Torvalds while (len > 0) { 9151da177e4SLinus Torvalds unsigned int this_len; 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9181da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9191da177e4SLinus Torvalds else 9201da177e4SLinus Torvalds this_len = len; 9211da177e4SLinus Torvalds 922e95a1b65SRussell King __acornscsi_in(host->base + (offset << 1), ptr, this_len); 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds offset += this_len; 9251da177e4SLinus Torvalds ptr += this_len; 9261da177e4SLinus Torvalds len -= this_len; 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds if (offset == (1 << 12)) { 9291da177e4SLinus Torvalds offset = 0; 9301da177e4SLinus Torvalds page ++; 931e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds } 934e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds /* 9381da177e4SLinus Torvalds * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, 9391da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length) 9401da177e4SLinus Torvalds * Purpose : write data to DMA RAM 9411da177e4SLinus Torvalds * Params : host - host to transfer from 9421da177e4SLinus Torvalds * ptr - DRAM address 9431da177e4SLinus Torvalds * start_addr - host mem address 9441da177e4SLinus Torvalds * length - number of bytes to transfer 9451da177e4SLinus Torvalds * Notes : this will only be one SG entry or less 9461da177e4SLinus Torvalds */ 9471da177e4SLinus Torvalds static 9481da177e4SLinus Torvalds void acornscsi_data_write(AS_Host *host, char *ptr, 9491da177e4SLinus Torvalds unsigned int start_addr, unsigned int length) 9501da177e4SLinus Torvalds { 951e95a1b65SRussell King extern void __acornscsi_out(void __iomem *, char *buf, int len); 9521da177e4SLinus Torvalds unsigned int page, offset, len = length; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds page = (start_addr >> 12); 9551da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1); 9561da177e4SLinus Torvalds 957e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds while (len > 0) { 9601da177e4SLinus Torvalds unsigned int this_len; 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds if (len + offset > (1 << 12)) 9631da177e4SLinus Torvalds this_len = (1 << 12) - offset; 9641da177e4SLinus Torvalds else 9651da177e4SLinus Torvalds this_len = len; 9661da177e4SLinus Torvalds 967e95a1b65SRussell King __acornscsi_out(host->base + (offset << 1), ptr, this_len); 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds offset += this_len; 9701da177e4SLinus Torvalds ptr += this_len; 9711da177e4SLinus Torvalds len -= this_len; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds if (offset == (1 << 12)) { 9741da177e4SLinus Torvalds offset = 0; 9751da177e4SLinus Torvalds page ++; 976e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds } 979e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG); 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds /* ========================================================================================= 9831da177e4SLinus Torvalds * On-board DMA routines 9841da177e4SLinus Torvalds */ 9851da177e4SLinus Torvalds #ifdef USE_DMAC 9861da177e4SLinus Torvalds /* 9871da177e4SLinus Torvalds * Prototype: void acornscsi_dmastop(AS_Host *host) 9881da177e4SLinus Torvalds * Purpose : stop all DMA 9891da177e4SLinus Torvalds * Params : host - host on which to stop DMA 9901da177e4SLinus Torvalds * Notes : This is called when leaving DATA IN/OUT phase, 9911da177e4SLinus Torvalds * or when interface is RESET 9921da177e4SLinus Torvalds */ 9931da177e4SLinus Torvalds static inline 9941da177e4SLinus Torvalds void acornscsi_dma_stop(AS_Host *host) 9951da177e4SLinus Torvalds { 996ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 997ffd7858dSRussell King dmac_clearintr(host); 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10001da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); 10011da177e4SLinus Torvalds #endif 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds /* 10051da177e4SLinus Torvalds * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10061da177e4SLinus Torvalds * Purpose : setup DMA controller for data transfer 10071da177e4SLinus Torvalds * Params : host - host to setup 10081da177e4SLinus Torvalds * direction - data transfer direction 10091da177e4SLinus Torvalds * Notes : This is called when entering DATA I/O phase, not 10101da177e4SLinus Torvalds * while we're in a DATA I/O phase 10111da177e4SLinus Torvalds */ 10121da177e4SLinus Torvalds static 10131da177e4SLinus Torvalds void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 10141da177e4SLinus Torvalds { 10151da177e4SLinus Torvalds unsigned int address, length, mode; 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds host->dma.direction = direction; 10181da177e4SLinus Torvalds 1019ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds if (direction == DMA_OUT) { 10221da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 10231da177e4SLinus Torvalds if (NO_WRITE & (1 << host->SCpnt->device->id)) { 10241da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", 10251da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 10261da177e4SLinus Torvalds return; 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds #endif 10291da177e4SLinus Torvalds mode = DMAC_WRITE; 10301da177e4SLinus Torvalds } else 10311da177e4SLinus Torvalds mode = DMAC_READ; 10321da177e4SLinus Torvalds 10331da177e4SLinus Torvalds /* 10341da177e4SLinus Torvalds * Allocate some buffer space, limited to half the buffer size 10351da177e4SLinus Torvalds */ 10361da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 10371da177e4SLinus Torvalds if (length) { 10381da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 10391da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 10401da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds /* 10431da177e4SLinus Torvalds * Transfer data to DMA memory 10441da177e4SLinus Torvalds */ 10451da177e4SLinus Torvalds if (direction == DMA_OUT) 10461da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 10471da177e4SLinus Torvalds length); 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds length -= 1; 1050ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1051ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1052ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1053ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1054ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1055ffd7858dSRussell King dmac_write(host, DMAC_MODECON, mode); 1056ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10591da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); 10601da177e4SLinus Torvalds #endif 10611da177e4SLinus Torvalds host->dma.xfer_setup = 1; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds /* 10661da177e4SLinus Torvalds * Function: void acornscsi_dma_cleanup(AS_Host *host) 10671da177e4SLinus Torvalds * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct 10681da177e4SLinus Torvalds * Params : host - host to finish 10691da177e4SLinus Torvalds * Notes : This is called when a command is: 10701125c70aSGeert Uytterhoeven * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONNECT 10711da177e4SLinus Torvalds * : This must not return until all transfers are completed. 10721da177e4SLinus Torvalds */ 10731da177e4SLinus Torvalds static 10741da177e4SLinus Torvalds void acornscsi_dma_cleanup(AS_Host *host) 10751da177e4SLinus Torvalds { 1076ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1077ffd7858dSRussell King dmac_clearintr(host); 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds /* 10801da177e4SLinus Torvalds * Check for a pending transfer 10811da177e4SLinus Torvalds */ 10821da177e4SLinus Torvalds if (host->dma.xfer_required) { 10831da177e4SLinus Torvalds host->dma.xfer_required = 0; 10841da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 10851da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 10861da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds /* 10901da177e4SLinus Torvalds * Has a transfer been setup? 10911da177e4SLinus Torvalds */ 10921da177e4SLinus Torvalds if (host->dma.xfer_setup) { 10931da177e4SLinus Torvalds unsigned int transferred; 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds host->dma.xfer_setup = 0; 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 10981da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); 10991da177e4SLinus Torvalds #endif 11001da177e4SLinus Torvalds 11011da177e4SLinus Torvalds /* 11021da177e4SLinus Torvalds * Calculate number of bytes transferred from DMA. 11031da177e4SLinus Torvalds */ 1104ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11051da177e4SLinus Torvalds host->dma.transferred += transferred; 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 11081da177e4SLinus Torvalds acornscsi_data_read(host, host->scsi.SCp.ptr, 11091da177e4SLinus Torvalds host->dma.start_addr, transferred); 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds /* 11121da177e4SLinus Torvalds * Update SCSI pointers 11131da177e4SLinus Torvalds */ 11141da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11151da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11161da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); 11171da177e4SLinus Torvalds #endif 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds /* 11221da177e4SLinus Torvalds * Function: void acornscsi_dmacintr(AS_Host *host) 11231da177e4SLinus Torvalds * Purpose : handle interrupts from DMAC device 11241da177e4SLinus Torvalds * Params : host - host to process 11251da177e4SLinus Torvalds * Notes : If reading, we schedule the read to main memory & 11261da177e4SLinus Torvalds * allow the transfer to continue. 11271da177e4SLinus Torvalds * : If writing, we fill the onboard DMA memory from main 11281da177e4SLinus Torvalds * memory. 11291da177e4SLinus Torvalds * : Called whenever DMAC finished it's current transfer. 11301da177e4SLinus Torvalds */ 11311da177e4SLinus Torvalds static 11321da177e4SLinus Torvalds void acornscsi_dma_intr(AS_Host *host) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds unsigned int address, length, transferred; 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11371da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); 11381da177e4SLinus Torvalds #endif 11391da177e4SLinus Torvalds 1140ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON); 1141ffd7858dSRussell King dmac_clearintr(host); 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds /* 11441da177e4SLinus Torvalds * Calculate amount transferred via DMA 11451da177e4SLinus Torvalds */ 1146ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr; 11471da177e4SLinus Torvalds host->dma.transferred += transferred; 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds /* 11501da177e4SLinus Torvalds * Schedule DMA transfer off board 11511da177e4SLinus Torvalds */ 11521da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) { 11531da177e4SLinus Torvalds host->dma.xfer_start = host->dma.start_addr; 11541da177e4SLinus Torvalds host->dma.xfer_length = transferred; 11551da177e4SLinus Torvalds host->dma.xfer_ptr = host->scsi.SCp.ptr; 11561da177e4SLinus Torvalds host->dma.xfer_required = 1; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds /* 11621da177e4SLinus Torvalds * Allocate some buffer space, limited to half the on-board RAM size 11631da177e4SLinus Torvalds */ 11641da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 11651da177e4SLinus Torvalds if (length) { 11661da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr; 11671da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) & 11681da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1); 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds /* 11711da177e4SLinus Torvalds * Transfer data to DMA memory 11721da177e4SLinus Torvalds */ 11731da177e4SLinus Torvalds if (host->dma.direction == DMA_OUT) 11741da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 11751da177e4SLinus Torvalds length); 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds length -= 1; 1178ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length); 1179ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8); 1180ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address); 1181ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8); 1182ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1183ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 11841da177e4SLinus Torvalds 11851da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA) 11861da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); 11871da177e4SLinus Torvalds #endif 11881da177e4SLinus Torvalds } else { 11891da177e4SLinus Torvalds host->dma.xfer_setup = 0; 11901da177e4SLinus Torvalds #if 0 11911da177e4SLinus Torvalds /* 11921da177e4SLinus Torvalds * If the interface still wants more, then this is an error. 11931da177e4SLinus Torvalds * We give it another byte, but we also attempt to raise an 11941da177e4SLinus Torvalds * attention condition. We continue giving one byte until 11951da177e4SLinus Torvalds * the device recognises the attention. 11961da177e4SLinus Torvalds */ 1197ffd7858dSRussell King if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) { 11981da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 11991da177e4SLinus Torvalds 1200ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, 0); 1201ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, 0); 1202ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, 0); 1203ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, 0); 1204ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0); 1205ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds #endif 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds /* 12121da177e4SLinus Torvalds * Function: void acornscsi_dma_xfer(AS_Host *host) 12131da177e4SLinus Torvalds * Purpose : transfer data between AcornSCSI and memory 12141da177e4SLinus Torvalds * Params : host - host to process 12151da177e4SLinus Torvalds */ 12161da177e4SLinus Torvalds static 12171da177e4SLinus Torvalds void acornscsi_dma_xfer(AS_Host *host) 12181da177e4SLinus Torvalds { 12191da177e4SLinus Torvalds host->dma.xfer_required = 0; 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) 12221da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr, 12231da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length); 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds /* 12271da177e4SLinus Torvalds * Function: void acornscsi_dma_adjust(AS_Host *host) 12281da177e4SLinus Torvalds * Purpose : adjust DMA pointers & count for bytes transferred to 12291da177e4SLinus Torvalds * SBIC but not SCSI bus. 12301da177e4SLinus Torvalds * Params : host - host to adjust DMA count for 12311da177e4SLinus Torvalds */ 12321da177e4SLinus Torvalds static 12331da177e4SLinus Torvalds void acornscsi_dma_adjust(AS_Host *host) 12341da177e4SLinus Torvalds { 12351da177e4SLinus Torvalds if (host->dma.xfer_setup) { 12361da177e4SLinus Torvalds signed long transferred; 12371da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12381da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); 12391da177e4SLinus Torvalds #endif 12401da177e4SLinus Torvalds /* 12411da177e4SLinus Torvalds * Calculate correct DMA address - DMA is ahead of SCSI bus while 12421da177e4SLinus Torvalds * writing. 12431da177e4SLinus Torvalds * host->scsi.SCp.scsi_xferred is the number of bytes 12441da177e4SLinus Torvalds * actually transferred to/from the SCSI bus. 12451da177e4SLinus Torvalds * host->dma.transferred is the number of bytes transferred 12461da177e4SLinus Torvalds * over DMA since host->dma.start_addr was last set. 12471da177e4SLinus Torvalds * 12481da177e4SLinus Torvalds * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred 12491da177e4SLinus Torvalds * - host->dma.transferred 12501da177e4SLinus Torvalds */ 12511da177e4SLinus Torvalds transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; 12521da177e4SLinus Torvalds if (transferred < 0) 12531da177e4SLinus Torvalds printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", 12541da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), transferred); 12551da177e4SLinus Torvalds else if (transferred == 0) 12561da177e4SLinus Torvalds host->dma.xfer_setup = 0; 12571da177e4SLinus Torvalds else { 12581da177e4SLinus Torvalds transferred += host->dma.start_addr; 1259ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, transferred); 1260ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, transferred >> 8); 1261ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, transferred >> 16); 12621da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 12631da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); 12641da177e4SLinus Torvalds #endif 12651da177e4SLinus Torvalds } 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds #endif 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds /* ========================================================================================= 12711da177e4SLinus Torvalds * Data I/O 12721da177e4SLinus Torvalds */ 12731da177e4SLinus Torvalds static int 12741da177e4SLinus Torvalds acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) 12751da177e4SLinus Torvalds { 12761da177e4SLinus Torvalds unsigned int asr, timeout = max_timeout; 12771da177e4SLinus Torvalds int my_ptr = *ptr; 12781da177e4SLinus Torvalds 12791da177e4SLinus Torvalds while (my_ptr < len) { 1280ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 12811da177e4SLinus Torvalds 12821da177e4SLinus Torvalds if (asr & ASR_DBR) { 12831da177e4SLinus Torvalds timeout = max_timeout; 12841da177e4SLinus Torvalds 1285ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]); 12861da177e4SLinus Torvalds } else if (asr & ASR_INT) 12871da177e4SLinus Torvalds break; 12881da177e4SLinus Torvalds else if (--timeout == 0) 12891da177e4SLinus Torvalds break; 12901da177e4SLinus Torvalds udelay(1); 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds *ptr = my_ptr; 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds return (timeout == 0) ? -1 : 0; 12961da177e4SLinus Torvalds } 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds /* 12991da177e4SLinus Torvalds * Function: void acornscsi_sendcommand(AS_Host *host) 13001da177e4SLinus Torvalds * Purpose : send a command to a target 13011da177e4SLinus Torvalds * Params : host - host which is connected to target 13021da177e4SLinus Torvalds */ 13031da177e4SLinus Torvalds static void 13041da177e4SLinus Torvalds acornscsi_sendcommand(AS_Host *host) 13051da177e4SLinus Torvalds { 1306ee0ca6baSHenne struct scsi_cmnd *SCpnt = host->SCpnt; 13071da177e4SLinus Torvalds 1308ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1309ffd7858dSRussell King sbic_arm_writenext(host, 0); 1310ffd7858dSRussell King sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command); 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds if (acornscsi_write_pio(host, SCpnt->cmnd, 13151da177e4SLinus Torvalds (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) 13161da177e4SLinus Torvalds printk("scsi%d: timeout while sending command\n", host->host->host_no); 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds host->scsi.phase = PHASE_COMMAND; 13191da177e4SLinus Torvalds } 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds static 13221da177e4SLinus Torvalds void acornscsi_sendmessage(AS_Host *host) 13231da177e4SLinus Torvalds { 13241da177e4SLinus Torvalds unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); 13251da177e4SLinus Torvalds unsigned int msgnr; 13261da177e4SLinus Torvalds struct message *msg; 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13291da177e4SLinus Torvalds printk("scsi%d.%c: sending message ", 13301da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 13311da177e4SLinus Torvalds #endif 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds switch (message_length) { 13341da177e4SLinus Torvalds case 0: 13351da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); 13381da177e4SLinus Torvalds 1339ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, NOP); 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds host->scsi.last_message = NOP; 13421da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13431da177e4SLinus Torvalds printk("NOP"); 13441da177e4SLinus Torvalds #endif 13451da177e4SLinus Torvalds break; 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds case 1: 13481da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 13491da177e4SLinus Torvalds msg = msgqueue_getmsg(&host->scsi.msgs, 0); 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); 13521da177e4SLinus Torvalds 1353ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, msg->msg[0]); 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13561da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13571abfd370SMatthew Wilcox spi_print_msg(msg->msg); 13581da177e4SLinus Torvalds #endif 13591da177e4SLinus Torvalds break; 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds default: 13621da177e4SLinus Torvalds /* 13631da177e4SLinus Torvalds * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) 13641da177e4SLinus Torvalds * 'When a target sends this (MESSAGE_REJECT) message, it 13651da177e4SLinus Torvalds * shall change to MESSAGE IN phase and send this message 13661da177e4SLinus Torvalds * prior to requesting additional message bytes from the 13671da177e4SLinus Torvalds * initiator. This provides an interlock so that the 13681da177e4SLinus Torvalds * initiator can determine which message byte is rejected. 13691da177e4SLinus Torvalds */ 1370ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0); 1371ffd7858dSRussell King sbic_arm_writenext(host, 0); 1372ffd7858dSRussell King sbic_arm_writenext(host, message_length); 13731da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 13741da177e4SLinus Torvalds 13751da177e4SLinus Torvalds msgnr = 0; 13761da177e4SLinus Torvalds while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { 13771da177e4SLinus Torvalds unsigned int i; 13781da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13791abfd370SMatthew Wilcox spi_print_msg(msg); 13801da177e4SLinus Torvalds #endif 13811da177e4SLinus Torvalds i = 0; 13821da177e4SLinus Torvalds if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) 13831da177e4SLinus Torvalds printk("scsi%d: timeout while sending message\n", host->host->host_no); 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0]; 13861da177e4SLinus Torvalds if (msg->msg[0] == EXTENDED_MESSAGE) 13871da177e4SLinus Torvalds host->scsi.last_message |= msg->msg[2] << 8; 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds if (i != msg->length) 13901da177e4SLinus Torvalds break; 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds break; 13931da177e4SLinus Torvalds } 13941da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 13951da177e4SLinus Torvalds printk("\n"); 13961da177e4SLinus Torvalds #endif 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 13991da177e4SLinus Torvalds /* 14001da177e4SLinus Torvalds * Function: void acornscsi_readstatusbyte(AS_Host *host) 14011da177e4SLinus Torvalds * Purpose : Read status byte from connected target 14021da177e4SLinus Torvalds * Params : host - host connected to target 14031da177e4SLinus Torvalds */ 14041da177e4SLinus Torvalds static 14051da177e4SLinus Torvalds void acornscsi_readstatusbyte(AS_Host *host) 14061da177e4SLinus Torvalds { 14071da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); 14081da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); 1409ffd7858dSRussell King host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA); 14101da177e4SLinus Torvalds } 14111da177e4SLinus Torvalds 14121da177e4SLinus Torvalds /* 14131da177e4SLinus Torvalds * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) 14141da177e4SLinus Torvalds * Purpose : Read one message byte from connected target 14151da177e4SLinus Torvalds * Params : host - host connected to target 14161da177e4SLinus Torvalds */ 14171da177e4SLinus Torvalds static 14181da177e4SLinus Torvalds unsigned char acornscsi_readmessagebyte(AS_Host *host) 14191da177e4SLinus Torvalds { 14201da177e4SLinus Torvalds unsigned char message; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); 14251da177e4SLinus Torvalds 1426ffd7858dSRussell King message = sbic_arm_read(host, SBIC_DATA); 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds /* wait for MSGIN-XFER-PAUSED */ 14291da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); 14301da177e4SLinus Torvalds 1431ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds return message; 14341da177e4SLinus Torvalds } 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds /* 14371da177e4SLinus Torvalds * Function: void acornscsi_message(AS_Host *host) 14381da177e4SLinus Torvalds * Purpose : Read complete message from connected target & action message 14391da177e4SLinus Torvalds * Params : host - host connected to target 14401da177e4SLinus Torvalds */ 14411da177e4SLinus Torvalds static 14421da177e4SLinus Torvalds void acornscsi_message(AS_Host *host) 14431da177e4SLinus Torvalds { 14441da177e4SLinus Torvalds unsigned char message[16]; 14451da177e4SLinus Torvalds unsigned int msgidx = 0, msglen = 1; 14461da177e4SLinus Torvalds 14471da177e4SLinus Torvalds do { 14481da177e4SLinus Torvalds message[msgidx] = acornscsi_readmessagebyte(host); 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds switch (msgidx) { 14511da177e4SLinus Torvalds case 0: 14521da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE || 14531da177e4SLinus Torvalds (message[0] >= 0x20 && message[0] <= 0x2f)) 14541da177e4SLinus Torvalds msglen = 2; 14551da177e4SLinus Torvalds break; 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds case 1: 14581da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE) 14591da177e4SLinus Torvalds msglen += message[msgidx]; 14601da177e4SLinus Torvalds break; 14611da177e4SLinus Torvalds } 14621da177e4SLinus Torvalds msgidx += 1; 14631da177e4SLinus Torvalds if (msgidx < msglen) { 14641da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 14651da177e4SLinus Torvalds 14661da177e4SLinus Torvalds /* wait for next msg-in */ 14671da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack"); 1468ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR); 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds } while (msgidx < msglen); 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES) 14731da177e4SLinus Torvalds printk("scsi%d.%c: message in: ", 14741da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 14751abfd370SMatthew Wilcox spi_print_msg(message); 14761da177e4SLinus Torvalds printk("\n"); 14771da177e4SLinus Torvalds #endif 14781da177e4SLinus Torvalds 14791da177e4SLinus Torvalds if (host->scsi.phase == PHASE_RECONNECTED) { 14801da177e4SLinus Torvalds /* 14811da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 14821da177e4SLinus Torvalds * 'Whenever a target reconnects to an initiator to continue 14831da177e4SLinus Torvalds * a tagged I/O process, the SIMPLE QUEUE TAG message shall 14841da177e4SLinus Torvalds * be sent immediately following the IDENTIFY message...' 14851da177e4SLinus Torvalds */ 14861da177e4SLinus Torvalds if (message[0] == SIMPLE_QUEUE_TAG) 14871da177e4SLinus Torvalds host->scsi.reconnected.tag = message[1]; 14881da177e4SLinus Torvalds if (acornscsi_reconnect_finish(host)) 14891da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 14901da177e4SLinus Torvalds } 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds switch (message[0]) { 14931da177e4SLinus Torvalds case ABORT: 14941da177e4SLinus Torvalds case ABORT_TAG: 14951da177e4SLinus Torvalds case COMMAND_COMPLETE: 14961da177e4SLinus Torvalds if (host->scsi.phase != PHASE_STATUSIN) { 14971da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", 14981da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 14991da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt->device->id); 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds host->scsi.phase = PHASE_DONE; 15021da177e4SLinus Torvalds host->scsi.SCp.Message = message[0]; 15031da177e4SLinus Torvalds break; 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds case SAVE_POINTERS: 15061da177e4SLinus Torvalds /* 15071da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) 15081da177e4SLinus Torvalds * 'The SAVE DATA POINTER message is sent from a target to 15091da177e4SLinus Torvalds * direct the initiator to copy the active data pointer to 15101da177e4SLinus Torvalds * the saved data pointer for the current I/O process. 15111da177e4SLinus Torvalds */ 15121da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15131da177e4SLinus Torvalds host->SCpnt->SCp = host->scsi.SCp; 15141da177e4SLinus Torvalds host->SCpnt->SCp.sent_command = 0; 15151da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15161da177e4SLinus Torvalds break; 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds case RESTORE_POINTERS: 15191da177e4SLinus Torvalds /* 15201da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) 15211da177e4SLinus Torvalds * 'The RESTORE POINTERS message is sent from a target to 15221da177e4SLinus Torvalds * direct the initiator to copy the most recently saved 15231da177e4SLinus Torvalds * command, data, and status pointers for the I/O process 15241da177e4SLinus Torvalds * to the corresponding active pointers. The command and 15251da177e4SLinus Torvalds * status pointers shall be restored to the beginning of 15261da177e4SLinus Torvalds * the present command and status areas.' 15271da177e4SLinus Torvalds */ 15281da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15291da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 15301da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 15311da177e4SLinus Torvalds break; 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds case DISCONNECT: 15341da177e4SLinus Torvalds /* 15351da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) 15361da177e4SLinus Torvalds * 'On those occasions when an error or exception condition occurs 15371da177e4SLinus Torvalds * and the target elects to repeat the information transfer, the 15381da177e4SLinus Torvalds * target may repeat the transfer either issuing a RESTORE POINTERS 15391da177e4SLinus Torvalds * message or by disconnecting without issuing a SAVE POINTERS 15401da177e4SLinus Torvalds * message. When reconnection is completed, the most recent 15411da177e4SLinus Torvalds * saved pointer values are restored.' 15421da177e4SLinus Torvalds */ 15431da177e4SLinus Torvalds acornscsi_dma_cleanup(host); 15441da177e4SLinus Torvalds host->scsi.phase = PHASE_DISCONNECT; 15451da177e4SLinus Torvalds break; 15461da177e4SLinus Torvalds 15471da177e4SLinus Torvalds case MESSAGE_REJECT: 15481da177e4SLinus Torvalds #if 0 /* this isn't needed any more */ 15491da177e4SLinus Torvalds /* 15501da177e4SLinus Torvalds * If we were negociating sync transfer, we don't yet know if 15511da177e4SLinus Torvalds * this REJECT is for the sync transfer or for the tagged queue/wide 155225985edcSLucas De Marchi * transfer. Re-initiate sync transfer negotiation now, and if 15531da177e4SLinus Torvalds * we got a REJECT in response to SDTR, then it'll be set to DONE. 15541da177e4SLinus Torvalds */ 15551da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) 15561da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; 15571da177e4SLinus Torvalds #endif 15581da177e4SLinus Torvalds 15591da177e4SLinus Torvalds /* 15601da177e4SLinus Torvalds * If we have any messages waiting to go out, then assert ATN now 15611da177e4SLinus Torvalds */ 15621da177e4SLinus Torvalds if (msgqueue_msglength(&host->scsi.msgs)) 15631da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 15641da177e4SLinus Torvalds 15651da177e4SLinus Torvalds switch (host->scsi.last_message) { 15661da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 15671da177e4SLinus Torvalds case HEAD_OF_QUEUE_TAG: 15681da177e4SLinus Torvalds case ORDERED_QUEUE_TAG: 15691da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 15701da177e4SLinus Torvalds /* 15711da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 15721da177e4SLinus Torvalds * If a target does not implement tagged queuing and a queue tag 15731da177e4SLinus Torvalds * message is received, it shall respond with a MESSAGE REJECT 15741da177e4SLinus Torvalds * message and accept the I/O process as if it were untagged. 15751da177e4SLinus Torvalds */ 15761da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", 15771da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15781da177e4SLinus Torvalds host->SCpnt->device->simple_tags = 0; 15799cb78c16SHannes Reinecke set_bit(host->SCpnt->device->id * 8 + 15809cb78c16SHannes Reinecke (u8)(host->SCpnt->device->lun & 0x7), host->busyluns); 15811da177e4SLinus Torvalds break; 15821da177e4SLinus Torvalds #endif 15831da177e4SLinus Torvalds case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): 15841da177e4SLinus Torvalds /* 15851da177e4SLinus Torvalds * Target can't handle synchronous transfers 15861da177e4SLinus Torvalds */ 15871da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", 15881da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 15891da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; 15901da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; 1591ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 15921da177e4SLinus Torvalds break; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds default: 15951da177e4SLinus Torvalds break; 15961da177e4SLinus Torvalds } 15971da177e4SLinus Torvalds break; 15981da177e4SLinus Torvalds 15991da177e4SLinus Torvalds case QUEUE_FULL: 16001da177e4SLinus Torvalds /* TODO: target queue is full */ 16011da177e4SLinus Torvalds break; 16021da177e4SLinus Torvalds 16031da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG: 16041da177e4SLinus Torvalds /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ 16051da177e4SLinus Torvalds printk("scsi%d.%c: reconnect queue tag %02X\n", 16061da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16071da177e4SLinus Torvalds message[1]); 16081da177e4SLinus Torvalds break; 16091da177e4SLinus Torvalds 16101da177e4SLinus Torvalds case EXTENDED_MESSAGE: 16111da177e4SLinus Torvalds switch (message[2]) { 16121da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 16131da177e4SLinus Torvalds case EXTENDED_SDTR: 16141da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { 16151da177e4SLinus Torvalds /* 16161da177e4SLinus Torvalds * We requested synchronous transfers. This isn't quite right... 16171da177e4SLinus Torvalds * We can only say if this succeeded if we proceed on to execute the 16181da177e4SLinus Torvalds * command from this message. If we get a MESSAGE PARITY ERROR, 16191da177e4SLinus Torvalds * and the target retries fail, then we fallback to asynchronous mode 16201da177e4SLinus Torvalds */ 16211da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; 16221da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", 16231da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16241da177e4SLinus Torvalds message[4], message[3] * 4); 16251da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16261da177e4SLinus Torvalds calc_sync_xfer(message[3] * 4, message[4]); 16271da177e4SLinus Torvalds } else { 16281da177e4SLinus Torvalds unsigned char period, length; 16291da177e4SLinus Torvalds /* 16301da177e4SLinus Torvalds * Target requested synchronous transfers. The agreement is only 16311da177e4SLinus Torvalds * to be in operation AFTER the target leaves message out phase. 16321da177e4SLinus Torvalds */ 16331da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16341da177e4SLinus Torvalds period = max_t(unsigned int, message[3], sdtr_period / 4); 16351da177e4SLinus Torvalds length = min_t(unsigned int, message[4], sdtr_size); 16361da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, 16371da177e4SLinus Torvalds EXTENDED_SDTR, period, length); 16381da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = 16391da177e4SLinus Torvalds calc_sync_xfer(period * 4, length); 16401da177e4SLinus Torvalds } 1641ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 16421da177e4SLinus Torvalds break; 16431da177e4SLinus Torvalds #else 16441da177e4SLinus Torvalds /* We do not accept synchronous transfers. Respond with a 16451da177e4SLinus Torvalds * MESSAGE_REJECT. 16461da177e4SLinus Torvalds */ 16471da177e4SLinus Torvalds #endif 16481da177e4SLinus Torvalds 16491da177e4SLinus Torvalds case EXTENDED_WDTR: 16501da177e4SLinus Torvalds /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT 16511da177e4SLinus Torvalds * to a wide data transfer request. 16521da177e4SLinus Torvalds */ 16531da177e4SLinus Torvalds default: 16541da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16551da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 16561da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 16571da177e4SLinus Torvalds break; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds break; 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds default: /* reject message */ 16621da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", 16631da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), 16641da177e4SLinus Torvalds message[0]); 16651da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 16661da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 16671da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 16681da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN; 16691da177e4SLinus Torvalds break; 16701da177e4SLinus Torvalds } 16711da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 16721da177e4SLinus Torvalds } 16731da177e4SLinus Torvalds 16741da177e4SLinus Torvalds /* 16751da177e4SLinus Torvalds * Function: int acornscsi_buildmessages(AS_Host *host) 16761da177e4SLinus Torvalds * Purpose : build the connection messages for a host 16771da177e4SLinus Torvalds * Params : host - host to add messages to 16781da177e4SLinus Torvalds */ 16791da177e4SLinus Torvalds static 16801da177e4SLinus Torvalds void acornscsi_buildmessages(AS_Host *host) 16811da177e4SLinus Torvalds { 16821da177e4SLinus Torvalds #if 0 16831da177e4SLinus Torvalds /* does the device need resetting? */ 16841da177e4SLinus Torvalds if (cmd_reset) { 16851da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); 16861da177e4SLinus Torvalds return; 16871da177e4SLinus Torvalds } 16881da177e4SLinus Torvalds #endif 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, 16911da177e4SLinus Torvalds IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, 16921da177e4SLinus Torvalds host->SCpnt->device->lun)); 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds #if 0 16951da177e4SLinus Torvalds /* does the device need the current command aborted */ 16961da177e4SLinus Torvalds if (cmd_aborted) { 16971da177e4SLinus Torvalds acornscsi_abortcmd(host->SCpnt->tag); 16981da177e4SLinus Torvalds return; 16991da177e4SLinus Torvalds } 17001da177e4SLinus Torvalds #endif 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 17031da177e4SLinus Torvalds if (host->SCpnt->tag) { 17041da177e4SLinus Torvalds unsigned int tag_type; 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds if (host->SCpnt->cmnd[0] == REQUEST_SENSE || 17071da177e4SLinus Torvalds host->SCpnt->cmnd[0] == TEST_UNIT_READY || 17081da177e4SLinus Torvalds host->SCpnt->cmnd[0] == INQUIRY) 17091da177e4SLinus Torvalds tag_type = HEAD_OF_QUEUE_TAG; 17101da177e4SLinus Torvalds else 17111da177e4SLinus Torvalds tag_type = SIMPLE_QUEUE_TAG; 17121da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); 17131da177e4SLinus Torvalds } 17141da177e4SLinus Torvalds #endif 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 17171da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { 17181da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; 17191da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, 17201da177e4SLinus Torvalds EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 17211da177e4SLinus Torvalds sdtr_period / 4, sdtr_size); 17221da177e4SLinus Torvalds } 17231da177e4SLinus Torvalds #endif 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds 17261da177e4SLinus Torvalds /* 17271da177e4SLinus Torvalds * Function: int acornscsi_starttransfer(AS_Host *host) 17281da177e4SLinus Torvalds * Purpose : transfer data to/from connected target 17291da177e4SLinus Torvalds * Params : host - host to which target is connected 17301da177e4SLinus Torvalds * Returns : 0 if failure 17311da177e4SLinus Torvalds */ 17321da177e4SLinus Torvalds static 17331da177e4SLinus Torvalds int acornscsi_starttransfer(AS_Host *host) 17341da177e4SLinus Torvalds { 17351da177e4SLinus Torvalds int residual; 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { 17381da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", 17391da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 17401da177e4SLinus Torvalds return 0; 17411da177e4SLinus Torvalds } 17421da177e4SLinus Torvalds 174384ac86caSBoaz Harrosh residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; 17441da177e4SLinus Torvalds 1745ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1746ffd7858dSRussell King sbic_arm_writenext(host, residual >> 16); 1747ffd7858dSRussell King sbic_arm_writenext(host, residual >> 8); 1748ffd7858dSRussell King sbic_arm_writenext(host, residual); 17491da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 17501da177e4SLinus Torvalds return 1; 17511da177e4SLinus Torvalds } 17521da177e4SLinus Torvalds 17531da177e4SLinus Torvalds /* ========================================================================================= 17541da177e4SLinus Torvalds * Connection & Disconnection 17551da177e4SLinus Torvalds */ 17561da177e4SLinus Torvalds /* 17571da177e4SLinus Torvalds * Function : acornscsi_reconnect(AS_Host *host) 17581da177e4SLinus Torvalds * Purpose : reconnect a previously disconnected command 17591da177e4SLinus Torvalds * Params : host - host specific data 17601da177e4SLinus Torvalds * Remarks : SCSI spec says: 17611da177e4SLinus Torvalds * 'The set of active pointers is restored from the set 17621da177e4SLinus Torvalds * of saved pointers upon reconnection of the I/O process' 17631da177e4SLinus Torvalds */ 17641da177e4SLinus Torvalds static 17651da177e4SLinus Torvalds int acornscsi_reconnect(AS_Host *host) 17661da177e4SLinus Torvalds { 17671da177e4SLinus Torvalds unsigned int target, lun, ok = 0; 17681da177e4SLinus Torvalds 1769ffd7858dSRussell King target = sbic_arm_read(host, SBIC_SOURCEID); 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds if (!(target & 8)) 17721da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: invalid source id after reselection " 17731da177e4SLinus Torvalds "- device fault?\n", 17741da177e4SLinus Torvalds host->host->host_no); 17751da177e4SLinus Torvalds 17761da177e4SLinus Torvalds target &= 7; 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) { 17791da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%d: reconnected while command in " 17801da177e4SLinus Torvalds "progress to target %d?\n", 17811da177e4SLinus Torvalds host->host->host_no, target, host->SCpnt->device->id); 17821da177e4SLinus Torvalds host->SCpnt = NULL; 17831da177e4SLinus Torvalds } 17841da177e4SLinus Torvalds 1785ffd7858dSRussell King lun = sbic_arm_read(host, SBIC_DATA) & 7; 17861da177e4SLinus Torvalds 17871da177e4SLinus Torvalds host->scsi.reconnected.target = target; 17881da177e4SLinus Torvalds host->scsi.reconnected.lun = lun; 17891da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 17901da177e4SLinus Torvalds 17911da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt && 17921da177e4SLinus Torvalds host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) 17931da177e4SLinus Torvalds ok = 1; 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) 17961da177e4SLinus Torvalds ok = 1; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds ADD_STATUS(target, 0x81, host->scsi.phase, 0); 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds if (ok) { 18011da177e4SLinus Torvalds host->scsi.phase = PHASE_RECONNECTED; 18021da177e4SLinus Torvalds } else { 18031da177e4SLinus Torvalds /* this doesn't seem to work */ 18041da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: reselected with no command " 18051da177e4SLinus Torvalds "to reconnect with\n", 18061da177e4SLinus Torvalds host->host->host_no, '0' + target); 18071da177e4SLinus Torvalds acornscsi_dumplog(host, target); 18081da177e4SLinus Torvalds acornscsi_abortcmd(host, 0); 18091da177e4SLinus Torvalds if (host->SCpnt) { 18101da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18111da177e4SLinus Torvalds host->SCpnt = NULL; 18121da177e4SLinus Torvalds } 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 18151da177e4SLinus Torvalds return !ok; 18161da177e4SLinus Torvalds } 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds /* 18191125c70aSGeert Uytterhoeven * Function: int acornscsi_reconnect_finish(AS_Host *host) 18201da177e4SLinus Torvalds * Purpose : finish reconnecting a command 18211da177e4SLinus Torvalds * Params : host - host to complete 18221da177e4SLinus Torvalds * Returns : 0 if failed 18231da177e4SLinus Torvalds */ 18241da177e4SLinus Torvalds static 18251da177e4SLinus Torvalds int acornscsi_reconnect_finish(AS_Host *host) 18261da177e4SLinus Torvalds { 18271da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) { 18281da177e4SLinus Torvalds host->scsi.disconnectable = 0; 18291da177e4SLinus Torvalds if (host->SCpnt->device->id == host->scsi.reconnected.target && 18301da177e4SLinus Torvalds host->SCpnt->device->lun == host->scsi.reconnected.lun && 18311da177e4SLinus Torvalds host->SCpnt->tag == host->scsi.reconnected.tag) { 18321da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18331da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: reconnected", 18341da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18351da177e4SLinus Torvalds #endif 18361da177e4SLinus Torvalds } else { 18371da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 18381da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18391da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to move command " 18401da177e4SLinus Torvalds "to disconnected queue\n", 18411da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18421da177e4SLinus Torvalds #endif 18431da177e4SLinus Torvalds host->SCpnt = NULL; 18441da177e4SLinus Torvalds } 18451da177e4SLinus Torvalds } 18461da177e4SLinus Torvalds if (!host->SCpnt) { 18471da177e4SLinus Torvalds host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, 18481da177e4SLinus Torvalds host->scsi.reconnected.target, 18491da177e4SLinus Torvalds host->scsi.reconnected.lun, 18501da177e4SLinus Torvalds host->scsi.reconnected.tag); 18511da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18521da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to get command", 18531da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host))); 18541da177e4SLinus Torvalds #endif 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds 18571da177e4SLinus Torvalds if (!host->SCpnt) 18581da177e4SLinus Torvalds acornscsi_abortcmd(host, host->scsi.reconnected.tag); 18591da177e4SLinus Torvalds else { 18601da177e4SLinus Torvalds /* 18611da177e4SLinus Torvalds * Restore data pointer from SAVED pointers. 18621da177e4SLinus Torvalds */ 18631da177e4SLinus Torvalds host->scsi.SCp = host->SCpnt->SCp; 18641da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18651da177e4SLinus Torvalds printk(", data pointers: [%p, %X]", 18661da177e4SLinus Torvalds host->scsi.SCp.ptr, host->scsi.SCp.this_residual); 18671da177e4SLinus Torvalds #endif 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 18701da177e4SLinus Torvalds printk("\n"); 18711da177e4SLinus Torvalds #endif 18721da177e4SLinus Torvalds 18731da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 18741da177e4SLinus Torvalds 18751da177e4SLinus Torvalds return host->SCpnt != NULL; 18761da177e4SLinus Torvalds } 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds /* 18791da177e4SLinus Torvalds * Function: void acornscsi_disconnect_unexpected(AS_Host *host) 18801da177e4SLinus Torvalds * Purpose : handle an unexpected disconnect 18811da177e4SLinus Torvalds * Params : host - host on which disconnect occurred 18821da177e4SLinus Torvalds */ 18831da177e4SLinus Torvalds static 18841da177e4SLinus Torvalds void acornscsi_disconnect_unexpected(AS_Host *host) 18851da177e4SLinus Torvalds { 18861da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", 18871da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 18881da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 18891da177e4SLinus Torvalds acornscsi_dumplog(host, 8); 18901da177e4SLinus Torvalds #endif 18911da177e4SLinus Torvalds 18921da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds /* 18961da177e4SLinus Torvalds * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) 18971da177e4SLinus Torvalds * Purpose : abort a currently executing command 18981da177e4SLinus Torvalds * Params : host - host with connected command to abort 18991da177e4SLinus Torvalds * tag - tag to abort 19001da177e4SLinus Torvalds */ 19011da177e4SLinus Torvalds static 19021da177e4SLinus Torvalds void acornscsi_abortcmd(AS_Host *host, unsigned char tag) 19031da177e4SLinus Torvalds { 19041da177e4SLinus Torvalds host->scsi.phase = PHASE_ABORTED; 1905ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN); 19061da177e4SLinus Torvalds 19071da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19081da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 19091da177e4SLinus Torvalds if (tag) 19101da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); 19111da177e4SLinus Torvalds else 19121da177e4SLinus Torvalds #endif 19131da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds 19161da177e4SLinus Torvalds /* ========================================================================================== 19171da177e4SLinus Torvalds * Interrupt routines. 19181da177e4SLinus Torvalds */ 19191da177e4SLinus Torvalds /* 19201da177e4SLinus Torvalds * Function: int acornscsi_sbicintr(AS_Host *host) 19211da177e4SLinus Torvalds * Purpose : handle interrupts from SCSI device 19221da177e4SLinus Torvalds * Params : host - host to process 19231da177e4SLinus Torvalds * Returns : INTR_PROCESS if expecting another SBIC interrupt 19241da177e4SLinus Torvalds * INTR_IDLE if no interrupt 19251da177e4SLinus Torvalds * INTR_NEXT_COMMAND if we have finished processing the command 19261da177e4SLinus Torvalds */ 19271da177e4SLinus Torvalds static 19281da177e4SLinus Torvalds intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) 19291da177e4SLinus Torvalds { 19301da177e4SLinus Torvalds unsigned int asr, ssr; 19311da177e4SLinus Torvalds 1932ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 19331da177e4SLinus Torvalds if (!(asr & ASR_INT)) 19341da177e4SLinus Torvalds return INTR_IDLE; 19351da177e4SLinus Torvalds 1936ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds #if (DEBUG & DEBUG_PHASES) 19391da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 19401da177e4SLinus Torvalds #endif 19411da177e4SLinus Torvalds 19421da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, in_irq); 19431da177e4SLinus Torvalds 19441da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) 19451da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 19461da177e4SLinus Torvalds 19471da177e4SLinus Torvalds switch (ssr) { 19481da177e4SLinus Torvalds case 0x00: /* reset state - not advanced */ 19491da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", 19501da177e4SLinus Torvalds host->host->host_no); 19511da177e4SLinus Torvalds /* setup sbic - WD33C93A */ 1952ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); 1953ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET); 19541da177e4SLinus Torvalds return INTR_IDLE; 19551da177e4SLinus Torvalds 19561da177e4SLinus Torvalds case 0x01: /* reset state - advanced */ 1957ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 1958ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); 1959ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 1960ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 19611da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19621da177e4SLinus Torvalds return INTR_IDLE; 19631da177e4SLinus Torvalds 19641da177e4SLinus Torvalds case 0x41: /* unexpected disconnect aborted command */ 19651da177e4SLinus Torvalds acornscsi_disconnect_unexpected(host); 19661da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds switch (host->scsi.phase) { 19701da177e4SLinus Torvalds case PHASE_CONNECTING: /* STATE: command removed from issue queue */ 19711da177e4SLinus Torvalds switch (ssr) { 19721da177e4SLinus Torvalds case 0x11: /* -> PHASE_CONNECTED */ 19731da177e4SLinus Torvalds /* BUS FREE -> SELECTION */ 19741da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTED; 19751da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19761da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred; 19771da177e4SLinus Torvalds /* 33C93 gives next interrupt indicating bus phase */ 1978ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 19791da177e4SLinus Torvalds if (!(asr & ASR_INT)) 19801da177e4SLinus Torvalds break; 1981ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 19821da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, 1); 19831da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); 19841da177e4SLinus Torvalds goto connected; 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds case 0x42: /* select timed out */ 19871da177e4SLinus Torvalds /* -> PHASE_IDLE */ 19881da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); 19891da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 19921da177e4SLinus Torvalds /* BUS FREE -> RESELECTION */ 19931da177e4SLinus Torvalds host->origSCpnt = host->SCpnt; 19941da177e4SLinus Torvalds host->SCpnt = NULL; 19951da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs); 19961da177e4SLinus Torvalds acornscsi_reconnect(host); 19971da177e4SLinus Torvalds break; 19981da177e4SLinus Torvalds 19991da177e4SLinus Torvalds default: 20001da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", 20011da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20021da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20031da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20041da177e4SLinus Torvalds } 20051da177e4SLinus Torvalds return INTR_PROCESSING; 20061da177e4SLinus Torvalds 20071da177e4SLinus Torvalds connected: 20081da177e4SLinus Torvalds case PHASE_CONNECTED: /* STATE: device selected ok */ 20091da177e4SLinus Torvalds switch (ssr) { 20101da177e4SLinus Torvalds #ifdef NONSTANDARD 20111da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20121da177e4SLinus Torvalds /* SELECTION -> COMMAND */ 20131da177e4SLinus Torvalds acornscsi_sendcommand(host); 20141da177e4SLinus Torvalds break; 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 20171da177e4SLinus Torvalds /* SELECTION -> STATUS */ 20181da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 20191da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 20201da177e4SLinus Torvalds break; 20211da177e4SLinus Torvalds #endif 20221da177e4SLinus Torvalds 20231da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 20241da177e4SLinus Torvalds /* SELECTION ->MESSAGE OUT */ 20251da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGOUT; 20261da177e4SLinus Torvalds acornscsi_buildmessages(host); 20271da177e4SLinus Torvalds acornscsi_sendmessage(host); 20281da177e4SLinus Torvalds break; 20291da177e4SLinus Torvalds 20301da177e4SLinus Torvalds /* these should not happen */ 20311da177e4SLinus Torvalds case 0x85: /* target disconnected */ 20321da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 20331da177e4SLinus Torvalds break; 20341da177e4SLinus Torvalds 20351da177e4SLinus Torvalds default: 20361da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", 20371da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20381da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20391da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20401da177e4SLinus Torvalds } 20411da177e4SLinus Torvalds return INTR_PROCESSING; 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ 20441da177e4SLinus Torvalds /* 20451da177e4SLinus Torvalds * SCSI standard says that MESSAGE OUT phases can be followed by a 20461da177e4SLinus Torvalds * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase 20471da177e4SLinus Torvalds */ 20481da177e4SLinus Torvalds switch (ssr) { 20491da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20501da177e4SLinus Torvalds case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 20511da177e4SLinus Torvalds /* MESSAGE OUT -> COMMAND */ 20521da177e4SLinus Torvalds acornscsi_sendcommand(host); 20531da177e4SLinus Torvalds break; 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */ 20561da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 20571da177e4SLinus Torvalds /* MESSAGE OUT -> STATUS */ 20581da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 20591da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 20601da177e4SLinus Torvalds break; 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 20631da177e4SLinus Torvalds /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ 20641da177e4SLinus Torvalds acornscsi_sendmessage(host); 20651da177e4SLinus Torvalds break; 20661da177e4SLinus Torvalds 20671da177e4SLinus Torvalds case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 20681da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 20691da177e4SLinus Torvalds /* MESSAGE OUT -> MESSAGE IN */ 20701da177e4SLinus Torvalds acornscsi_message(host); 20711da177e4SLinus Torvalds break; 20721da177e4SLinus Torvalds 20731da177e4SLinus Torvalds default: 20741da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", 20751da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 20761da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 20771da177e4SLinus Torvalds } 20781da177e4SLinus Torvalds return INTR_PROCESSING; 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds case PHASE_COMMAND: /* STATE: connected & command sent */ 20811da177e4SLinus Torvalds switch (ssr) { 20821da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 20831da177e4SLinus Torvalds /* COMMAND -> DATA OUT */ 20841da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 20851da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20861da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 20871da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 20881da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20891da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 20901da177e4SLinus Torvalds return INTR_IDLE; 20911da177e4SLinus Torvalds 20921da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 20931da177e4SLinus Torvalds /* COMMAND -> DATA IN */ 20941da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 20951da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20961da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 20971da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 20981da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 20991da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 21001da177e4SLinus Torvalds return INTR_IDLE; 21011da177e4SLinus Torvalds 21021da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */ 21031da177e4SLinus Torvalds /* COMMAND -> STATUS */ 21041da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21051da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21061da177e4SLinus Torvalds break; 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 21091da177e4SLinus Torvalds /* COMMAND -> MESSAGE OUT */ 21101da177e4SLinus Torvalds acornscsi_sendmessage(host); 21111da177e4SLinus Torvalds break; 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21141da177e4SLinus Torvalds /* COMMAND -> MESSAGE IN */ 21151da177e4SLinus Torvalds acornscsi_message(host); 21161da177e4SLinus Torvalds break; 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvalds default: 21191da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n", 21201da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21211da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21221da177e4SLinus Torvalds } 21231da177e4SLinus Torvalds return INTR_PROCESSING; 21241da177e4SLinus Torvalds 21251da177e4SLinus Torvalds case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ 21261da177e4SLinus Torvalds if (ssr == 0x85) { /* -> PHASE_IDLE */ 21271da177e4SLinus Torvalds host->scsi.disconnectable = 1; 21281da177e4SLinus Torvalds host->scsi.reconnected.tag = 0; 21291da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 21301da177e4SLinus Torvalds host->stats.disconnects += 1; 21311da177e4SLinus Torvalds } else { 21321da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", 21331da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21341da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 21371da177e4SLinus Torvalds 21381da177e4SLinus Torvalds case PHASE_IDLE: /* STATE: disconnected */ 21391da177e4SLinus Torvalds if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 21401da177e4SLinus Torvalds acornscsi_reconnect(host); 21411da177e4SLinus Torvalds else { 21421da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", 21431da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 21441da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 21451da177e4SLinus Torvalds } 21461da177e4SLinus Torvalds return INTR_PROCESSING; 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ 21491da177e4SLinus Torvalds /* 21501da177e4SLinus Torvalds * Command reconnected - if MESGIN, get message - it may be 21511da177e4SLinus Torvalds * the tag. If not, get command out of disconnected queue 21521da177e4SLinus Torvalds */ 21531da177e4SLinus Torvalds /* 21541da177e4SLinus Torvalds * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, 21551da177e4SLinus Torvalds * reconnect I_T_L command 21561da177e4SLinus Torvalds */ 21571da177e4SLinus Torvalds if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) 21581da177e4SLinus Torvalds return INTR_IDLE; 21591da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 21601da177e4SLinus Torvalds switch (ssr) { 21611da177e4SLinus Torvalds case 0x88: /* data out phase */ 21621da177e4SLinus Torvalds /* -> PHASE_DATAOUT */ 21631da177e4SLinus Torvalds /* MESSAGE IN -> DATA OUT */ 21641da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT); 21651da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21661da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21671da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT; 21681da177e4SLinus Torvalds return INTR_IDLE; 21691da177e4SLinus Torvalds 21701da177e4SLinus Torvalds case 0x89: /* data in phase */ 21711da177e4SLinus Torvalds /* -> PHASE_DATAIN */ 21721da177e4SLinus Torvalds /* MESSAGE IN -> DATA IN */ 21731da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN); 21741da177e4SLinus Torvalds if (!acornscsi_starttransfer(host)) 21751da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 21761da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN; 21771da177e4SLinus Torvalds return INTR_IDLE; 21781da177e4SLinus Torvalds 21791da177e4SLinus Torvalds case 0x8a: /* command out */ 21801da177e4SLinus Torvalds /* MESSAGE IN -> COMMAND */ 21811da177e4SLinus Torvalds acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 21821da177e4SLinus Torvalds break; 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds case 0x8b: /* status in */ 21851da177e4SLinus Torvalds /* -> PHASE_STATUSIN */ 21861da177e4SLinus Torvalds /* MESSAGE IN -> STATUS */ 21871da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 21881da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 21891da177e4SLinus Torvalds break; 21901da177e4SLinus Torvalds 21911da177e4SLinus Torvalds case 0x8e: /* message out */ 21921da177e4SLinus Torvalds /* -> PHASE_MSGOUT */ 21931da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 21941da177e4SLinus Torvalds acornscsi_sendmessage(host); 21951da177e4SLinus Torvalds break; 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvalds case 0x8f: /* message in */ 21981da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 21991da177e4SLinus Torvalds break; 22001da177e4SLinus Torvalds 22011da177e4SLinus Torvalds default: 22021da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", 22031da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22041da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 22051da177e4SLinus Torvalds } 22061da177e4SLinus Torvalds return INTR_PROCESSING; 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds case PHASE_DATAIN: /* STATE: transferred data in */ 22091da177e4SLinus Torvalds /* 22101da177e4SLinus Torvalds * This is simple - if we disconnect then the DMA address & count is 22111da177e4SLinus Torvalds * correct. 22121da177e4SLinus Torvalds */ 22131da177e4SLinus Torvalds switch (ssr) { 22141da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */ 22151da177e4SLinus Torvalds case 0x89: /* -> PHASE_DATAIN */ 22161da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22171da177e4SLinus Torvalds return INTR_IDLE; 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 22201da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 22211da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 22221da177e4SLinus Torvalds /* DATA IN -> STATUS */ 222384ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22241da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22251da177e4SLinus Torvalds acornscsi_dma_stop(host); 22261da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22271da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22281da177e4SLinus Torvalds break; 22291da177e4SLinus Torvalds 22301da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 22311da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 22321da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 22331da177e4SLinus Torvalds /* DATA IN -> MESSAGE OUT */ 223484ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22351da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22361da177e4SLinus Torvalds acornscsi_dma_stop(host); 22371da177e4SLinus Torvalds acornscsi_sendmessage(host); 22381da177e4SLinus Torvalds break; 22391da177e4SLinus Torvalds 22401da177e4SLinus Torvalds case 0x1f: /* message in */ 22411da177e4SLinus Torvalds case 0x4f: /* message in */ 22421da177e4SLinus Torvalds case 0x8f: /* message in */ 22431da177e4SLinus Torvalds /* DATA IN -> MESSAGE IN */ 224484ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22451da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22461da177e4SLinus Torvalds acornscsi_dma_stop(host); 22471da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 22481da177e4SLinus Torvalds break; 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds default: 22511da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", 22521da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 22531da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 22541da177e4SLinus Torvalds } 22551da177e4SLinus Torvalds return INTR_PROCESSING; 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds case PHASE_DATAOUT: /* STATE: transferred data out */ 22581da177e4SLinus Torvalds /* 22591da177e4SLinus Torvalds * This is more complicated - if we disconnect, the DMA could be 12 22601da177e4SLinus Torvalds * bytes ahead of us. We need to correct this. 22611da177e4SLinus Torvalds */ 22621da177e4SLinus Torvalds switch (ssr) { 22631da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */ 22641da177e4SLinus Torvalds case 0x88: /* -> PHASE_DATAOUT */ 22651da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 22661da177e4SLinus Torvalds return INTR_IDLE; 22671da177e4SLinus Torvalds 22681da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */ 22691da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */ 22701da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */ 22711da177e4SLinus Torvalds /* DATA OUT -> STATUS */ 227284ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22731da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22741da177e4SLinus Torvalds acornscsi_dma_stop(host); 22751da177e4SLinus Torvalds acornscsi_dma_adjust(host); 22761da177e4SLinus Torvalds acornscsi_readstatusbyte(host); 22771da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN; 22781da177e4SLinus Torvalds break; 22791da177e4SLinus Torvalds 22801da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 22811da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 22821da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 22831da177e4SLinus Torvalds /* DATA OUT -> MESSAGE OUT */ 228484ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22851da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22861da177e4SLinus Torvalds acornscsi_dma_stop(host); 22871da177e4SLinus Torvalds acornscsi_dma_adjust(host); 22881da177e4SLinus Torvalds acornscsi_sendmessage(host); 22891da177e4SLinus Torvalds break; 22901da177e4SLinus Torvalds 22911da177e4SLinus Torvalds case 0x1f: /* message in */ 22921da177e4SLinus Torvalds case 0x4f: /* message in */ 22931da177e4SLinus Torvalds case 0x8f: /* message in */ 22941da177e4SLinus Torvalds /* DATA OUT -> MESSAGE IN */ 229584ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 22961da177e4SLinus Torvalds acornscsi_sbic_xfcount(host); 22971da177e4SLinus Torvalds acornscsi_dma_stop(host); 22981da177e4SLinus Torvalds acornscsi_dma_adjust(host); 22991da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 23001da177e4SLinus Torvalds break; 23011da177e4SLinus Torvalds 23021da177e4SLinus Torvalds default: 23031da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", 23041da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23051da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23061da177e4SLinus Torvalds } 23071da177e4SLinus Torvalds return INTR_PROCESSING; 23081da177e4SLinus Torvalds 23091da177e4SLinus Torvalds case PHASE_STATUSIN: /* STATE: status in complete */ 23101da177e4SLinus Torvalds switch (ssr) { 23111da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23121da177e4SLinus Torvalds case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23131da177e4SLinus Torvalds /* STATUS -> MESSAGE IN */ 23141da177e4SLinus Torvalds acornscsi_message(host); 23151da177e4SLinus Torvalds break; 23161da177e4SLinus Torvalds 23171da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23181da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23191da177e4SLinus Torvalds /* STATUS -> MESSAGE OUT */ 23201da177e4SLinus Torvalds acornscsi_sendmessage(host); 23211da177e4SLinus Torvalds break; 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds default: 23241da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", 23251da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23261da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23271da177e4SLinus Torvalds } 23281da177e4SLinus Torvalds return INTR_PROCESSING; 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds case PHASE_MSGIN: /* STATE: message in */ 23311da177e4SLinus Torvalds switch (ssr) { 23321da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */ 23331da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */ 23341da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */ 23351da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */ 23361da177e4SLinus Torvalds acornscsi_sendmessage(host); 23371da177e4SLinus Torvalds break; 23381da177e4SLinus Torvalds 23391da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 23401da177e4SLinus Torvalds case 0x2f: 23411da177e4SLinus Torvalds case 0x4f: 23421da177e4SLinus Torvalds case 0x8f: 23431da177e4SLinus Torvalds acornscsi_message(host); 23441da177e4SLinus Torvalds break; 23451da177e4SLinus Torvalds 23461da177e4SLinus Torvalds case 0x85: 23471da177e4SLinus Torvalds printk("scsi%d.%c: strange message in disconnection\n", 23481da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)); 23491da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23501da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR); 23511da177e4SLinus Torvalds break; 23521da177e4SLinus Torvalds 23531da177e4SLinus Torvalds default: 23541da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", 23551da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23561da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23571da177e4SLinus Torvalds } 23581da177e4SLinus Torvalds return INTR_PROCESSING; 23591da177e4SLinus Torvalds 23601da177e4SLinus Torvalds case PHASE_DONE: /* STATE: received status & message */ 23611da177e4SLinus Torvalds switch (ssr) { 23621da177e4SLinus Torvalds case 0x85: /* -> PHASE_IDLE */ 23631da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_OK); 23641da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 23651da177e4SLinus Torvalds 23661da177e4SLinus Torvalds case 0x1e: 23671da177e4SLinus Torvalds case 0x8e: 23681da177e4SLinus Torvalds acornscsi_sendmessage(host); 23691da177e4SLinus Torvalds break; 23701da177e4SLinus Torvalds 23711da177e4SLinus Torvalds default: 23721da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", 23731da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 23741da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 23751da177e4SLinus Torvalds } 23761da177e4SLinus Torvalds return INTR_PROCESSING; 23771da177e4SLinus Torvalds 23781da177e4SLinus Torvalds case PHASE_ABORTED: 23791da177e4SLinus Torvalds switch (ssr) { 23801da177e4SLinus Torvalds case 0x85: 23811da177e4SLinus Torvalds if (host->SCpnt) 23821da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ABORT); 23831da177e4SLinus Torvalds else { 23841da177e4SLinus Torvalds clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, 23851da177e4SLinus Torvalds host->busyluns); 23861da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE; 23871da177e4SLinus Torvalds } 23881da177e4SLinus Torvalds return INTR_NEXT_COMMAND; 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds case 0x1e: 23911da177e4SLinus Torvalds case 0x2e: 23921da177e4SLinus Torvalds case 0x4e: 23931da177e4SLinus Torvalds case 0x8e: 23941da177e4SLinus Torvalds acornscsi_sendmessage(host); 23951da177e4SLinus Torvalds break; 23961da177e4SLinus Torvalds 23971da177e4SLinus Torvalds default: 23981da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n", 23991da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24001da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24011da177e4SLinus Torvalds } 24021da177e4SLinus Torvalds return INTR_PROCESSING; 24031da177e4SLinus Torvalds 24041da177e4SLinus Torvalds default: 24051da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", 24061da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr); 24071da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds return INTR_PROCESSING; 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds 24121da177e4SLinus Torvalds /* 24137d12e780SDavid Howells * Prototype: void acornscsi_intr(int irq, void *dev_id) 24141da177e4SLinus Torvalds * Purpose : handle interrupts from Acorn SCSI card 24151da177e4SLinus Torvalds * Params : irq - interrupt number 24161da177e4SLinus Torvalds * dev_id - device specific data (AS_Host structure) 24171da177e4SLinus Torvalds */ 24181da177e4SLinus Torvalds static irqreturn_t 24197d12e780SDavid Howells acornscsi_intr(int irq, void *dev_id) 24201da177e4SLinus Torvalds { 24211da177e4SLinus Torvalds AS_Host *host = (AS_Host *)dev_id; 24221da177e4SLinus Torvalds intr_ret_t ret; 24231da177e4SLinus Torvalds int iostatus; 24241da177e4SLinus Torvalds int in_irq = 0; 24251da177e4SLinus Torvalds 24261da177e4SLinus Torvalds do { 24271da177e4SLinus Torvalds ret = INTR_IDLE; 24281da177e4SLinus Torvalds 2429e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds if (iostatus & 2) { 24321da177e4SLinus Torvalds acornscsi_dma_intr(host); 2433e95a1b65SRussell King iostatus = readb(host->fast + INT_REG); 24341da177e4SLinus Torvalds } 24351da177e4SLinus Torvalds 24361da177e4SLinus Torvalds if (iostatus & 8) 24371da177e4SLinus Torvalds ret = acornscsi_sbicintr(host, in_irq); 24381da177e4SLinus Torvalds 24391da177e4SLinus Torvalds /* 24401da177e4SLinus Torvalds * If we have a transfer pending, start it. 24411da177e4SLinus Torvalds * Only start it if the interface has already started transferring 24421da177e4SLinus Torvalds * it's data 24431da177e4SLinus Torvalds */ 24441da177e4SLinus Torvalds if (host->dma.xfer_required) 24451da177e4SLinus Torvalds acornscsi_dma_xfer(host); 24461da177e4SLinus Torvalds 24471da177e4SLinus Torvalds if (ret == INTR_NEXT_COMMAND) 24481da177e4SLinus Torvalds ret = acornscsi_kick(host); 24491da177e4SLinus Torvalds 24501da177e4SLinus Torvalds in_irq = 1; 24511da177e4SLinus Torvalds } while (ret != INTR_IDLE); 24521da177e4SLinus Torvalds 24531da177e4SLinus Torvalds return IRQ_HANDLED; 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds 24561da177e4SLinus Torvalds /*============================================================================================= 24571da177e4SLinus Torvalds * Interfaces between interrupt handler and rest of scsi code 24581da177e4SLinus Torvalds */ 24591da177e4SLinus Torvalds 24601da177e4SLinus Torvalds /* 2461ee0ca6baSHenne * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 24621da177e4SLinus Torvalds * Purpose : queues a SCSI command 24631da177e4SLinus Torvalds * Params : cmd - SCSI command 24641da177e4SLinus Torvalds * done - function called on completion, with pointer to command descriptor 24651da177e4SLinus Torvalds * Returns : 0, or < 0 on error. 24661da177e4SLinus Torvalds */ 2467f281233dSJeff Garzik static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt, 2468ee0ca6baSHenne void (*done)(struct scsi_cmnd *)) 24691da177e4SLinus Torvalds { 24701da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds if (!done) { 24731da177e4SLinus Torvalds /* there should be some way of rejecting errors like this without panicing... */ 24741da177e4SLinus Torvalds panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", 24751da177e4SLinus Torvalds host->host->host_no, SCpnt); 24761da177e4SLinus Torvalds return -EINVAL; 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds 24791da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 24801da177e4SLinus Torvalds if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { 24811da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", 24821da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id); 24831da177e4SLinus Torvalds SCpnt->result = DID_NO_CONNECT << 16; 24841da177e4SLinus Torvalds done(SCpnt); 24851da177e4SLinus Torvalds return 0; 24861da177e4SLinus Torvalds } 24871da177e4SLinus Torvalds #endif 24881da177e4SLinus Torvalds 24891da177e4SLinus Torvalds SCpnt->scsi_done = done; 24901da177e4SLinus Torvalds SCpnt->host_scribble = NULL; 24911da177e4SLinus Torvalds SCpnt->result = 0; 24921da177e4SLinus Torvalds SCpnt->tag = 0; 24931da177e4SLinus Torvalds SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); 24941da177e4SLinus Torvalds SCpnt->SCp.sent_command = 0; 24951da177e4SLinus Torvalds SCpnt->SCp.scsi_xferred = 0; 24961da177e4SLinus Torvalds 24971da177e4SLinus Torvalds init_SCp(SCpnt); 24981da177e4SLinus Torvalds 24991da177e4SLinus Torvalds host->stats.queues += 1; 25001da177e4SLinus Torvalds 25011da177e4SLinus Torvalds { 25021da177e4SLinus Torvalds unsigned long flags; 25031da177e4SLinus Torvalds 25041da177e4SLinus Torvalds if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { 25051da177e4SLinus Torvalds SCpnt->result = DID_ERROR << 16; 25061da177e4SLinus Torvalds done(SCpnt); 25071da177e4SLinus Torvalds return 0; 25081da177e4SLinus Torvalds } 25091da177e4SLinus Torvalds local_irq_save(flags); 25101da177e4SLinus Torvalds if (host->scsi.phase == PHASE_IDLE) 25111da177e4SLinus Torvalds acornscsi_kick(host); 25121da177e4SLinus Torvalds local_irq_restore(flags); 25131da177e4SLinus Torvalds } 25141da177e4SLinus Torvalds return 0; 25151da177e4SLinus Torvalds } 25161da177e4SLinus Torvalds 2517f281233dSJeff Garzik DEF_SCSI_QCMD(acornscsi_queuecmd) 2518f281233dSJeff Garzik 25191da177e4SLinus Torvalds /* 2520ee0ca6baSHenne * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result) 25211da177e4SLinus Torvalds * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 25221da177e4SLinus Torvalds * Params : SCpntp1 - pointer to command to return 25231da177e4SLinus Torvalds * SCpntp2 - pointer to command to check 25241da177e4SLinus Torvalds * result - result to pass back to mid-level done function 25251da177e4SLinus Torvalds * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. 25261da177e4SLinus Torvalds */ 2527ee0ca6baSHenne static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, 2528ee0ca6baSHenne struct scsi_cmnd **SCpntp2, 2529ee0ca6baSHenne int result) 25301da177e4SLinus Torvalds { 2531ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp1; 25321da177e4SLinus Torvalds 25331da177e4SLinus Torvalds if (SCpnt) { 25341da177e4SLinus Torvalds *SCpntp1 = NULL; 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds SCpnt->result = result; 25371da177e4SLinus Torvalds SCpnt->scsi_done(SCpnt); 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds 25401da177e4SLinus Torvalds if (SCpnt == *SCpntp2) 25411da177e4SLinus Torvalds *SCpntp2 = NULL; 25421da177e4SLinus Torvalds } 25431da177e4SLinus Torvalds 25441da177e4SLinus Torvalds enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds /* 2547ee0ca6baSHenne * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) 25481da177e4SLinus Torvalds * Purpose : abort a command on this host 25491da177e4SLinus Torvalds * Params : SCpnt - command to abort 25501da177e4SLinus Torvalds * Returns : our abort status 25511da177e4SLinus Torvalds */ 2552ee0ca6baSHenne static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt) 25531da177e4SLinus Torvalds { 25541da177e4SLinus Torvalds enum res_abort res = res_not_running; 25551da177e4SLinus Torvalds 25561da177e4SLinus Torvalds if (queue_remove_cmd(&host->queues.issue, SCpnt)) { 25571da177e4SLinus Torvalds /* 25581da177e4SLinus Torvalds * The command was on the issue queue, and has not been 25591da177e4SLinus Torvalds * issued yet. We can remove the command from the queue, 25601da177e4SLinus Torvalds * and acknowledge the abort. Neither the devices nor the 25611da177e4SLinus Torvalds * interface know about the command. 25621da177e4SLinus Torvalds */ 25631da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25641da177e4SLinus Torvalds printk("on issue queue "); 25651da177e4SLinus Torvalds //#endif 25661da177e4SLinus Torvalds res = res_success; 25671da177e4SLinus Torvalds } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { 25681da177e4SLinus Torvalds /* 25691da177e4SLinus Torvalds * The command was on the disconnected queue. Simply 25701da177e4SLinus Torvalds * acknowledge the abort condition, and when the target 25711da177e4SLinus Torvalds * reconnects, we will give it an ABORT message. The 25721da177e4SLinus Torvalds * target should then disconnect, and we will clear 25731da177e4SLinus Torvalds * the busylun bit. 25741da177e4SLinus Torvalds */ 25751da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25761da177e4SLinus Torvalds printk("on disconnected queue "); 25771da177e4SLinus Torvalds //#endif 25781da177e4SLinus Torvalds res = res_success; 25791da177e4SLinus Torvalds } else if (host->SCpnt == SCpnt) { 25801da177e4SLinus Torvalds unsigned long flags; 25811da177e4SLinus Torvalds 25821da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 25831da177e4SLinus Torvalds printk("executing "); 25841da177e4SLinus Torvalds //#endif 25851da177e4SLinus Torvalds 25861da177e4SLinus Torvalds local_irq_save(flags); 25871da177e4SLinus Torvalds switch (host->scsi.phase) { 25881da177e4SLinus Torvalds /* 25891da177e4SLinus Torvalds * If the interface is idle, and the command is 'disconnectable', 25901da177e4SLinus Torvalds * then it is the same as on the disconnected queue. We simply 25911da177e4SLinus Torvalds * remove all traces of the command. When the target reconnects, 25921da177e4SLinus Torvalds * we will give it an ABORT message since the command could not 25931da177e4SLinus Torvalds * be found. When the target finally disconnects, we will clear 25941da177e4SLinus Torvalds * the busylun bit. 25951da177e4SLinus Torvalds */ 25961da177e4SLinus Torvalds case PHASE_IDLE: 25971da177e4SLinus Torvalds if (host->scsi.disconnectable) { 25981da177e4SLinus Torvalds host->scsi.disconnectable = 0; 25991da177e4SLinus Torvalds host->SCpnt = NULL; 26001da177e4SLinus Torvalds res = res_success; 26011da177e4SLinus Torvalds } 26021da177e4SLinus Torvalds break; 26031da177e4SLinus Torvalds 26041da177e4SLinus Torvalds /* 26051da177e4SLinus Torvalds * If the command has connected and done nothing further, 26061da177e4SLinus Torvalds * simply force a disconnect. We also need to clear the 26071da177e4SLinus Torvalds * busylun bit. 26081da177e4SLinus Torvalds */ 26091da177e4SLinus Torvalds case PHASE_CONNECTED: 2610ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT); 26111da177e4SLinus Torvalds host->SCpnt = NULL; 26121da177e4SLinus Torvalds res = res_success_clear; 26131da177e4SLinus Torvalds break; 26141da177e4SLinus Torvalds 26151da177e4SLinus Torvalds default: 26161da177e4SLinus Torvalds acornscsi_abortcmd(host, host->SCpnt->tag); 26171da177e4SLinus Torvalds res = res_snooze; 26181da177e4SLinus Torvalds } 26191da177e4SLinus Torvalds local_irq_restore(flags); 26201da177e4SLinus Torvalds } else if (host->origSCpnt == SCpnt) { 26211da177e4SLinus Torvalds /* 26221da177e4SLinus Torvalds * The command will be executed next, but a command 26231da177e4SLinus Torvalds * is currently using the interface. This is similar to 26241da177e4SLinus Torvalds * being on the issue queue, except the busylun bit has 26251da177e4SLinus Torvalds * been set. 26261da177e4SLinus Torvalds */ 26271da177e4SLinus Torvalds host->origSCpnt = NULL; 26281da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26291da177e4SLinus Torvalds printk("waiting for execution "); 26301da177e4SLinus Torvalds //#endif 26311da177e4SLinus Torvalds res = res_success_clear; 26321da177e4SLinus Torvalds } else 26331da177e4SLinus Torvalds printk("unknown "); 26341da177e4SLinus Torvalds 26351da177e4SLinus Torvalds return res; 26361da177e4SLinus Torvalds } 26371da177e4SLinus Torvalds 26381da177e4SLinus Torvalds /* 2639ee0ca6baSHenne * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) 26401da177e4SLinus Torvalds * Purpose : abort a command on this host 26411da177e4SLinus Torvalds * Params : SCpnt - command to abort 26421da177e4SLinus Torvalds * Returns : one of SCSI_ABORT_ macros 26431da177e4SLinus Torvalds */ 2644ee0ca6baSHenne int acornscsi_abort(struct scsi_cmnd *SCpnt) 26451da177e4SLinus Torvalds { 26461da177e4SLinus Torvalds AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; 26471da177e4SLinus Torvalds int result; 26481da177e4SLinus Torvalds 26491da177e4SLinus Torvalds host->stats.aborts += 1; 26501da177e4SLinus Torvalds 26511da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT) 26521da177e4SLinus Torvalds { 26531da177e4SLinus Torvalds int asr, ssr; 2654ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2655ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 26561da177e4SLinus Torvalds 26571da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_abort: "); 26581da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 26591da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 26601da177e4SLinus Torvalds } 26611da177e4SLinus Torvalds #endif 26621da177e4SLinus Torvalds 26631da177e4SLinus Torvalds printk("scsi%d: ", host->host->host_no); 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds switch (acornscsi_do_abort(host, SCpnt)) { 26661da177e4SLinus Torvalds /* 26671da177e4SLinus Torvalds * We managed to find the command and cleared it out. 26681da177e4SLinus Torvalds * We do not expect the command to be executing on the 26691da177e4SLinus Torvalds * target, but we have set the busylun bit. 26701da177e4SLinus Torvalds */ 26711da177e4SLinus Torvalds case res_success_clear: 26721da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26731da177e4SLinus Torvalds printk("clear "); 26741da177e4SLinus Torvalds //#endif 26759cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 + 26769cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns); 26771da177e4SLinus Torvalds 26781da177e4SLinus Torvalds /* 26791da177e4SLinus Torvalds * We found the command, and cleared it out. Either 26801da177e4SLinus Torvalds * the command is still known to be executing on the 26811da177e4SLinus Torvalds * target, or the busylun bit is not set. 26821da177e4SLinus Torvalds */ 26831da177e4SLinus Torvalds case res_success: 26841da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26851da177e4SLinus Torvalds printk("success\n"); 26861da177e4SLinus Torvalds //#endif 2687324b9337SRussell King result = SUCCESS; 26881da177e4SLinus Torvalds break; 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds /* 26911da177e4SLinus Torvalds * We did find the command, but unfortunately we couldn't 26921da177e4SLinus Torvalds * unhook it from ourselves. Wait some more, and if it 26931da177e4SLinus Torvalds * still doesn't complete, reset the interface. 26941da177e4SLinus Torvalds */ 26951da177e4SLinus Torvalds case res_snooze: 26961da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 26971da177e4SLinus Torvalds printk("snooze\n"); 26981da177e4SLinus Torvalds //#endif 2699324b9337SRussell King result = FAILED; 27001da177e4SLinus Torvalds break; 27011da177e4SLinus Torvalds 27021da177e4SLinus Torvalds /* 27031da177e4SLinus Torvalds * The command could not be found (either because it completed, 27041da177e4SLinus Torvalds * or it got dropped. 27051da177e4SLinus Torvalds */ 27061da177e4SLinus Torvalds default: 27071da177e4SLinus Torvalds case res_not_running: 27081da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id); 2709324b9337SRussell King result = FAILED; 27101da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT) 27111da177e4SLinus Torvalds printk("not running\n"); 27121da177e4SLinus Torvalds //#endif 27131da177e4SLinus Torvalds break; 27141da177e4SLinus Torvalds } 27151da177e4SLinus Torvalds 27161da177e4SLinus Torvalds return result; 27171da177e4SLinus Torvalds } 27181da177e4SLinus Torvalds 27191da177e4SLinus Torvalds /* 2720324b9337SRussell King * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) 27211da177e4SLinus Torvalds * Purpose : reset a command on this host/reset this host 27221da177e4SLinus Torvalds * Params : SCpnt - command causing reset 27231da177e4SLinus Torvalds * Returns : one of SCSI_RESET_ macros 27241da177e4SLinus Torvalds */ 2725fd536998SArnd Bergmann int acornscsi_host_reset(struct scsi_cmnd *SCpnt) 27261da177e4SLinus Torvalds { 2727fd536998SArnd Bergmann AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 2728ee0ca6baSHenne struct scsi_cmnd *SCptr; 27291da177e4SLinus Torvalds 27301da177e4SLinus Torvalds host->stats.resets += 1; 27311da177e4SLinus Torvalds 27321da177e4SLinus Torvalds #if (DEBUG & DEBUG_RESET) 27331da177e4SLinus Torvalds { 273474fa80eeSHannes Reinecke int asr, ssr, devidx; 27351da177e4SLinus Torvalds 2736ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR); 2737ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR); 27381da177e4SLinus Torvalds 27391da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_reset: "); 27401da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase); 2741fd536998SArnd Bergmann for (devidx = 0; devidx < 9; devidx++) 274274fa80eeSHannes Reinecke acornscsi_dumplog(host, devidx); 27431da177e4SLinus Torvalds } 27441da177e4SLinus Torvalds #endif 27451da177e4SLinus Torvalds 27461da177e4SLinus Torvalds acornscsi_dma_stop(host); 27471da177e4SLinus Torvalds 27481da177e4SLinus Torvalds /* 27491da177e4SLinus Torvalds * do hard reset. This resets all devices on this host, and so we 27501da177e4SLinus Torvalds * must set the reset status on all commands. 27511da177e4SLinus Torvalds */ 27521da177e4SLinus Torvalds acornscsi_resetcard(host); 27531da177e4SLinus Torvalds 27541da177e4SLinus Torvalds while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) 2755324b9337SRussell King ; 27561da177e4SLinus Torvalds 2757324b9337SRussell King return SUCCESS; 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds 27601da177e4SLinus Torvalds /*============================================================================================== 27611da177e4SLinus Torvalds * initialisation & miscellaneous support 27621da177e4SLinus Torvalds */ 27631da177e4SLinus Torvalds 27641da177e4SLinus Torvalds /* 27651da177e4SLinus Torvalds * Function: char *acornscsi_info(struct Scsi_Host *host) 27661da177e4SLinus Torvalds * Purpose : return a string describing this interface 27671da177e4SLinus Torvalds * Params : host - host to give information on 27681da177e4SLinus Torvalds * Returns : a constant string 27691da177e4SLinus Torvalds */ 27701da177e4SLinus Torvalds const 27711da177e4SLinus Torvalds char *acornscsi_info(struct Scsi_Host *host) 27721da177e4SLinus Torvalds { 27731da177e4SLinus Torvalds static char string[100], *p; 27741da177e4SLinus Torvalds 27751da177e4SLinus Torvalds p = string; 27761da177e4SLinus Torvalds 27771da177e4SLinus Torvalds p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" 27781da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 27791da177e4SLinus Torvalds " SYNC" 27801da177e4SLinus Torvalds #endif 27811da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 27821da177e4SLinus Torvalds " TAG" 27831da177e4SLinus Torvalds #endif 27841da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2785a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 27861da177e4SLinus Torvalds #endif 27871da177e4SLinus Torvalds , host->hostt->name, host->io_port, host->irq, 27881da177e4SLinus Torvalds VER_MAJOR, VER_MINOR, VER_PATCH); 27891da177e4SLinus Torvalds return string; 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds 279256b8e8e5SAl Viro static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance) 27931da177e4SLinus Torvalds { 279456b8e8e5SAl Viro int devidx; 2795f64a181dSChristoph Hellwig struct scsi_device *scd; 27961da177e4SLinus Torvalds AS_Host *host; 27971da177e4SLinus Torvalds 27981da177e4SLinus Torvalds host = (AS_Host *)instance->hostdata; 27991da177e4SLinus Torvalds 280056b8e8e5SAl Viro seq_printf(m, "AcornSCSI driver v%d.%d.%d" 28011da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC 28021da177e4SLinus Torvalds " SYNC" 28031da177e4SLinus Torvalds #endif 28041da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 28051da177e4SLinus Torvalds " TAG" 28061da177e4SLinus Torvalds #endif 28071da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE) 2808a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")" 28091da177e4SLinus Torvalds #endif 28101da177e4SLinus Torvalds "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); 28111da177e4SLinus Torvalds 281256b8e8e5SAl Viro seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n", 2813e95a1b65SRussell King host->base + SBIC_REGIDX, host->scsi.irq); 28141da177e4SLinus Torvalds #ifdef USE_DMAC 281556b8e8e5SAl Viro seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n", 2816e95a1b65SRussell King host->base + DMAC_OFFSET, host->scsi.irq); 28171da177e4SLinus Torvalds #endif 28181da177e4SLinus Torvalds 281956b8e8e5SAl Viro seq_printf(m, "Statistics:\n" 28201da177e4SLinus Torvalds "Queued commands: %-10u Issued commands: %-10u\n" 28211da177e4SLinus Torvalds "Done commands : %-10u Reads : %-10u\n" 28221da177e4SLinus Torvalds "Writes : %-10u Others : %-10u\n" 28231da177e4SLinus Torvalds "Disconnects : %-10u Aborts : %-10u\n" 28241da177e4SLinus Torvalds "Resets : %-10u\n\nLast phases:", 28251da177e4SLinus Torvalds host->stats.queues, host->stats.removes, 28261da177e4SLinus Torvalds host->stats.fins, host->stats.reads, 28271da177e4SLinus Torvalds host->stats.writes, host->stats.miscs, 28281da177e4SLinus Torvalds host->stats.disconnects, host->stats.aborts, 28291da177e4SLinus Torvalds host->stats.resets); 28301da177e4SLinus Torvalds 28311da177e4SLinus Torvalds for (devidx = 0; devidx < 9; devidx ++) { 28321da177e4SLinus Torvalds unsigned int statptr, prev; 28331da177e4SLinus Torvalds 283456b8e8e5SAl Viro seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); 28351da177e4SLinus Torvalds statptr = host->status_ptr[devidx] - 10; 28361da177e4SLinus Torvalds 28371da177e4SLinus Torvalds if ((signed int)statptr < 0) 28381da177e4SLinus Torvalds statptr += STATUS_BUFFER_SIZE; 28391da177e4SLinus Torvalds 28401da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 28411da177e4SLinus Torvalds 28421da177e4SLinus Torvalds for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 28431da177e4SLinus Torvalds if (host->status[devidx][statptr].when) { 284456b8e8e5SAl Viro seq_printf(m, "%c%02X:%02X+%2ld", 28451da177e4SLinus Torvalds host->status[devidx][statptr].irq ? '-' : ' ', 28461da177e4SLinus Torvalds host->status[devidx][statptr].ph, 28471da177e4SLinus Torvalds host->status[devidx][statptr].ssr, 28481da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) < 100 ? 28491da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) : 99); 28501da177e4SLinus Torvalds prev = host->status[devidx][statptr].when; 28511da177e4SLinus Torvalds } 28521da177e4SLinus Torvalds } 28531da177e4SLinus Torvalds } 28541da177e4SLinus Torvalds 285556b8e8e5SAl Viro seq_printf(m, "\nAttached devices:\n"); 28561da177e4SLinus Torvalds 28571da177e4SLinus Torvalds shost_for_each_device(scd, instance) { 285856b8e8e5SAl Viro seq_printf(m, "Device/Lun TaggedQ Sync\n"); 28599cb78c16SHannes Reinecke seq_printf(m, " %d/%llu ", scd->id, scd->lun); 28601da177e4SLinus Torvalds if (scd->tagged_supported) 286156b8e8e5SAl Viro seq_printf(m, "%3sabled(%3d) ", 28621da177e4SLinus Torvalds scd->simple_tags ? "en" : "dis", 28631da177e4SLinus Torvalds scd->current_tag); 28641da177e4SLinus Torvalds else 286556b8e8e5SAl Viro seq_printf(m, "unsupported "); 28661da177e4SLinus Torvalds 28671da177e4SLinus Torvalds if (host->device[scd->id].sync_xfer & 15) 286856b8e8e5SAl Viro seq_printf(m, "offset %d, %d ns\n", 28691da177e4SLinus Torvalds host->device[scd->id].sync_xfer & 15, 28701da177e4SLinus Torvalds acornscsi_getperiod(host->device[scd->id].sync_xfer)); 28711da177e4SLinus Torvalds else 287256b8e8e5SAl Viro seq_printf(m, "async\n"); 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds } 287556b8e8e5SAl Viro return 0; 28761da177e4SLinus Torvalds } 28771da177e4SLinus Torvalds 2878d0be4a7dSChristoph Hellwig static struct scsi_host_template acornscsi_template = { 28791da177e4SLinus Torvalds .module = THIS_MODULE, 288056b8e8e5SAl Viro .show_info = acornscsi_show_info, 28811da177e4SLinus Torvalds .name = "AcornSCSI", 28821da177e4SLinus Torvalds .info = acornscsi_info, 28831da177e4SLinus Torvalds .queuecommand = acornscsi_queuecmd, 2884324b9337SRussell King .eh_abort_handler = acornscsi_abort, 288574fa80eeSHannes Reinecke .eh_host_reset_handler = acornscsi_host_reset, 28861da177e4SLinus Torvalds .can_queue = 16, 28871da177e4SLinus Torvalds .this_id = 7, 28881da177e4SLinus Torvalds .sg_tablesize = SG_ALL, 28891da177e4SLinus Torvalds .cmd_per_lun = 2, 28904af14d11SChristoph Hellwig .dma_boundary = PAGE_SIZE - 1, 28911da177e4SLinus Torvalds .proc_name = "acornscsi", 28921da177e4SLinus Torvalds }; 28931da177e4SLinus Torvalds 28946f039790SGreg Kroah-Hartman static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 28951da177e4SLinus Torvalds { 28961da177e4SLinus Torvalds struct Scsi_Host *host; 28971da177e4SLinus Torvalds AS_Host *ashost; 2898e95a1b65SRussell King int ret; 2899e95a1b65SRussell King 2900e95a1b65SRussell King ret = ecard_request_resources(ec); 2901e95a1b65SRussell King if (ret) 2902e95a1b65SRussell King goto out; 29031da177e4SLinus Torvalds 29041da177e4SLinus Torvalds host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); 2905e95a1b65SRussell King if (!host) { 2906e95a1b65SRussell King ret = -ENOMEM; 2907e95a1b65SRussell King goto out_release; 2908e95a1b65SRussell King } 29091da177e4SLinus Torvalds 29101da177e4SLinus Torvalds ashost = (AS_Host *)host->hostdata; 29111da177e4SLinus Torvalds 2912e95a1b65SRussell King ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 2913e95a1b65SRussell King ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 291442c76c98SChristophe JAILLET if (!ashost->base || !ashost->fast) { 291542c76c98SChristophe JAILLET ret = -ENOMEM; 2916e95a1b65SRussell King goto out_put; 291742c76c98SChristophe JAILLET } 2918e95a1b65SRussell King 29191da177e4SLinus Torvalds host->irq = ec->irq; 29201da177e4SLinus Torvalds ashost->host = host; 29211da177e4SLinus Torvalds ashost->scsi.irq = host->irq; 29221da177e4SLinus Torvalds 2923e95a1b65SRussell King ec->irqaddr = ashost->fast + INT_REG; 29241da177e4SLinus Torvalds ec->irqmask = 0x0a; 29251da177e4SLinus Torvalds 29264909cc2bSMichael Opdenacker ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost); 29271da177e4SLinus Torvalds if (ret) { 29281da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", 29291da177e4SLinus Torvalds host->host_no, ashost->scsi.irq, ret); 2930e95a1b65SRussell King goto out_put; 29311da177e4SLinus Torvalds } 29321da177e4SLinus Torvalds 29331da177e4SLinus Torvalds memset(&ashost->stats, 0, sizeof (ashost->stats)); 29341da177e4SLinus Torvalds queue_initialise(&ashost->queues.issue); 29351da177e4SLinus Torvalds queue_initialise(&ashost->queues.disconnected); 29361da177e4SLinus Torvalds msgqueue_initialise(&ashost->scsi.msgs); 29371da177e4SLinus Torvalds 29381da177e4SLinus Torvalds acornscsi_resetcard(ashost); 29391da177e4SLinus Torvalds 29401da177e4SLinus Torvalds ret = scsi_add_host(host, &ec->dev); 29411da177e4SLinus Torvalds if (ret) 2942e95a1b65SRussell King goto out_irq; 29431da177e4SLinus Torvalds 29441da177e4SLinus Torvalds scsi_scan_host(host); 29451da177e4SLinus Torvalds goto out; 29461da177e4SLinus Torvalds 2947e95a1b65SRussell King out_irq: 29481da177e4SLinus Torvalds free_irq(host->irq, ashost); 2949e95a1b65SRussell King msgqueue_free(&ashost->scsi.msgs); 2950e95a1b65SRussell King queue_free(&ashost->queues.disconnected); 2951e95a1b65SRussell King queue_free(&ashost->queues.issue); 2952e95a1b65SRussell King out_put: 2953e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 2954e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 29551da177e4SLinus Torvalds scsi_host_put(host); 2956e95a1b65SRussell King out_release: 2957e95a1b65SRussell King ecard_release_resources(ec); 29581da177e4SLinus Torvalds out: 29591da177e4SLinus Torvalds return ret; 29601da177e4SLinus Torvalds } 29611da177e4SLinus Torvalds 29626f039790SGreg Kroah-Hartman static void acornscsi_remove(struct expansion_card *ec) 29631da177e4SLinus Torvalds { 29641da177e4SLinus Torvalds struct Scsi_Host *host = ecard_get_drvdata(ec); 29651da177e4SLinus Torvalds AS_Host *ashost = (AS_Host *)host->hostdata; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds ecard_set_drvdata(ec, NULL); 29681da177e4SLinus Torvalds scsi_remove_host(host); 29691da177e4SLinus Torvalds 29701da177e4SLinus Torvalds /* 29711da177e4SLinus Torvalds * Put card into RESET state 29721da177e4SLinus Torvalds */ 2973e95a1b65SRussell King writeb(0x80, ashost->fast + PAGE_REG); 29741da177e4SLinus Torvalds 29751da177e4SLinus Torvalds free_irq(host->irq, ashost); 29761da177e4SLinus Torvalds 29771da177e4SLinus Torvalds msgqueue_free(&ashost->scsi.msgs); 29781da177e4SLinus Torvalds queue_free(&ashost->queues.disconnected); 29791da177e4SLinus Torvalds queue_free(&ashost->queues.issue); 2980e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast); 2981e95a1b65SRussell King ecardm_iounmap(ec, ashost->base); 29821da177e4SLinus Torvalds scsi_host_put(host); 2983e95a1b65SRussell King ecard_release_resources(ec); 29841da177e4SLinus Torvalds } 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds static const struct ecard_id acornscsi_cids[] = { 29871da177e4SLinus Torvalds { MANU_ACORN, PROD_ACORN_SCSI }, 29881da177e4SLinus Torvalds { 0xffff, 0xffff }, 29891da177e4SLinus Torvalds }; 29901da177e4SLinus Torvalds 29911da177e4SLinus Torvalds static struct ecard_driver acornscsi_driver = { 29921da177e4SLinus Torvalds .probe = acornscsi_probe, 29936f039790SGreg Kroah-Hartman .remove = acornscsi_remove, 29941da177e4SLinus Torvalds .id_table = acornscsi_cids, 29951da177e4SLinus Torvalds .drv = { 29961da177e4SLinus Torvalds .name = "acornscsi", 29971da177e4SLinus Torvalds }, 29981da177e4SLinus Torvalds }; 29991da177e4SLinus Torvalds 30001da177e4SLinus Torvalds static int __init acornscsi_init(void) 30011da177e4SLinus Torvalds { 30021da177e4SLinus Torvalds return ecard_register_driver(&acornscsi_driver); 30031da177e4SLinus Torvalds } 30041da177e4SLinus Torvalds 30051da177e4SLinus Torvalds static void __exit acornscsi_exit(void) 30061da177e4SLinus Torvalds { 30071da177e4SLinus Torvalds ecard_remove_driver(&acornscsi_driver); 30081da177e4SLinus Torvalds } 30091da177e4SLinus Torvalds 30101da177e4SLinus Torvalds module_init(acornscsi_init); 30111da177e4SLinus Torvalds module_exit(acornscsi_exit); 30121da177e4SLinus Torvalds 30131da177e4SLinus Torvalds MODULE_AUTHOR("Russell King"); 30141da177e4SLinus Torvalds MODULE_DESCRIPTION("AcornSCSI driver"); 30151da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 3016