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 */
56756fb6a8SHannes Reinecke
571da177e4SLinus Torvalds /*
581da177e4SLinus Torvalds * SCSI-II Synchronous transfer support.
591da177e4SLinus Torvalds *
601da177e4SLinus Torvalds * Tried and tested...
611da177e4SLinus Torvalds *
621da177e4SLinus Torvalds * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max)
631da177e4SLinus Torvalds * SDTR_PERIOD - period of REQ signal (min=125, max=1020)
641da177e4SLinus Torvalds * DEFAULT_PERIOD - default REQ period.
651da177e4SLinus Torvalds */
661da177e4SLinus Torvalds #define SDTR_SIZE 12
671da177e4SLinus Torvalds #define SDTR_PERIOD 125
681da177e4SLinus Torvalds #define DEFAULT_PERIOD 500
691da177e4SLinus Torvalds
701da177e4SLinus Torvalds /*
711da177e4SLinus Torvalds * Debugging information
721da177e4SLinus Torvalds *
731da177e4SLinus Torvalds * DEBUG - bit mask from list above
741da177e4SLinus Torvalds * DEBUG_TARGET - is defined to the target number if you want to debug
751da177e4SLinus Torvalds * a specific target. [only recon/write/dma].
761da177e4SLinus Torvalds */
771da177e4SLinus Torvalds #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE)
781da177e4SLinus Torvalds /* only allow writing to SCSI device 0 */
791da177e4SLinus Torvalds #define NO_WRITE 0xFE
801da177e4SLinus Torvalds /*#define DEBUG_TARGET 2*/
811da177e4SLinus Torvalds /*
821da177e4SLinus Torvalds * Select timeout time (in 10ms units)
831da177e4SLinus Torvalds *
841da177e4SLinus Torvalds * This is the timeout used between the start of selection and the WD33C93
851da177e4SLinus Torvalds * chip deciding that the device isn't responding.
861da177e4SLinus Torvalds */
871da177e4SLinus Torvalds #define TIMEOUT_TIME 10
881da177e4SLinus Torvalds /*
8925985edcSLucas De Marchi * Define this if you want to have verbose explanation of SCSI
901da177e4SLinus Torvalds * status/messages.
911da177e4SLinus Torvalds */
921da177e4SLinus Torvalds #undef CONFIG_ACORNSCSI_CONSTANTS
931da177e4SLinus Torvalds /*
941da177e4SLinus Torvalds * Define this if you want to use the on board DMAC [don't remove this option]
951da177e4SLinus Torvalds * If not set, then use PIO mode (not currently supported).
961da177e4SLinus Torvalds */
971da177e4SLinus Torvalds #define USE_DMAC
981da177e4SLinus Torvalds
991da177e4SLinus Torvalds /*
1001da177e4SLinus Torvalds * ====================================================================================
1011da177e4SLinus Torvalds */
1021da177e4SLinus Torvalds
1031da177e4SLinus Torvalds #ifdef DEBUG_TARGET
1041da177e4SLinus Torvalds #define DBG(cmd,xxx...) \
1051da177e4SLinus Torvalds if (cmd->device->id == DEBUG_TARGET) { \
1061da177e4SLinus Torvalds xxx; \
1071da177e4SLinus Torvalds }
1081da177e4SLinus Torvalds #else
1091da177e4SLinus Torvalds #define DBG(cmd,xxx...) xxx
1101da177e4SLinus Torvalds #endif
1111da177e4SLinus Torvalds
1121da177e4SLinus Torvalds #include <linux/module.h>
1131da177e4SLinus Torvalds #include <linux/kernel.h>
1141da177e4SLinus Torvalds #include <linux/string.h>
1151da177e4SLinus Torvalds #include <linux/signal.h>
1161da177e4SLinus Torvalds #include <linux/errno.h>
1171da177e4SLinus Torvalds #include <linux/proc_fs.h>
1181da177e4SLinus Torvalds #include <linux/ioport.h>
1191da177e4SLinus Torvalds #include <linux/blkdev.h>
1201da177e4SLinus Torvalds #include <linux/delay.h>
1211da177e4SLinus Torvalds #include <linux/interrupt.h>
1221da177e4SLinus Torvalds #include <linux/init.h>
1231da177e4SLinus Torvalds #include <linux/bitops.h>
124a796ef70SRussell King #include <linux/stringify.h>
125e95a1b65SRussell King #include <linux/io.h>
1261da177e4SLinus Torvalds
1271da177e4SLinus Torvalds #include <asm/ecard.h>
1281da177e4SLinus Torvalds
12953555fb7SBart Van Assche #include <scsi/scsi.h>
13053555fb7SBart Van Assche #include <scsi/scsi_cmnd.h>
131db9dff36S #include <scsi/scsi_dbg.h>
13253555fb7SBart Van Assche #include <scsi/scsi_device.h>
13353555fb7SBart Van Assche #include <scsi/scsi_eh.h>
1341da177e4SLinus Torvalds #include <scsi/scsi_host.h>
13553555fb7SBart Van Assche #include <scsi/scsi_tcq.h>
1361abfd370SMatthew Wilcox #include <scsi/scsi_transport_spi.h>
1371da177e4SLinus Torvalds #include "acornscsi.h"
1381da177e4SLinus Torvalds #include "msgqueue.h"
1398c97e2f3SBart Van Assche #include "arm_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 #ifdef USE_DMAC
1481da177e4SLinus Torvalds /*
1491da177e4SLinus Torvalds * DMAC setup parameters
1501da177e4SLinus Torvalds */
1511da177e4SLinus Torvalds #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP)
1521da177e4SLinus Torvalds #define INIT_DEVCON1 (DEVCON1_BHLD)
1531da177e4SLinus Torvalds #define DMAC_READ (MODECON_READ)
1541da177e4SLinus Torvalds #define DMAC_WRITE (MODECON_WRITE)
1551da177e4SLinus Torvalds #define INIT_SBICDMA (CTRL_DMABURST)
1561da177e4SLinus Torvalds
1571da177e4SLinus Torvalds #define scsi_xferred have_data_in
1581da177e4SLinus Torvalds
1591da177e4SLinus Torvalds /*
1601da177e4SLinus Torvalds * Size of on-board DMA buffer
1611da177e4SLinus Torvalds */
1621da177e4SLinus Torvalds #define DMAC_BUFFER_SIZE 65536
1631da177e4SLinus Torvalds #endif
1641da177e4SLinus Torvalds
1651da177e4SLinus Torvalds #define STATUS_BUFFER_TO_PRINT 24
1661da177e4SLinus Torvalds
1671da177e4SLinus Torvalds unsigned int sdtr_period = SDTR_PERIOD;
1681da177e4SLinus Torvalds unsigned int sdtr_size = SDTR_SIZE;
1691da177e4SLinus Torvalds
170ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
171ee0ca6baSHenne unsigned int result);
1721da177e4SLinus Torvalds static int acornscsi_reconnect_finish(AS_Host *host);
1731da177e4SLinus Torvalds static void acornscsi_dma_cleanup(AS_Host *host);
174756fb6a8SHannes Reinecke static void acornscsi_abortcmd(AS_Host *host);
1751da177e4SLinus Torvalds
1761da177e4SLinus Torvalds /* ====================================================================================
1771da177e4SLinus Torvalds * Miscellaneous
1781da177e4SLinus Torvalds */
1791da177e4SLinus Torvalds
180e95a1b65SRussell King /* Offsets from MEMC base */
181e95a1b65SRussell King #define SBIC_REGIDX 0x2000
182e95a1b65SRussell King #define SBIC_REGVAL 0x2004
183e95a1b65SRussell King #define DMAC_OFFSET 0x3000
184e95a1b65SRussell King
185e95a1b65SRussell King /* Offsets from FAST IOC base */
186e95a1b65SRussell King #define INT_REG 0x2000
187e95a1b65SRussell King #define PAGE_REG 0x3000
188e95a1b65SRussell King
sbic_arm_write(AS_Host * host,unsigned int reg,unsigned int value)189ffd7858dSRussell King static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value)
1901da177e4SLinus Torvalds {
191e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX);
192e95a1b65SRussell King writeb(value, host->base + SBIC_REGVAL);
1931da177e4SLinus Torvalds }
1941da177e4SLinus Torvalds
sbic_arm_read(AS_Host * host,unsigned int reg)195ffd7858dSRussell King static inline int sbic_arm_read(AS_Host *host, unsigned int reg)
1961da177e4SLinus Torvalds {
1971da177e4SLinus Torvalds if(reg == SBIC_ASR)
198e95a1b65SRussell King return readl(host->base + SBIC_REGIDX) & 255;
199e95a1b65SRussell King writeb(reg, host->base + SBIC_REGIDX);
200e95a1b65SRussell King return readl(host->base + SBIC_REGVAL) & 255;
2011da177e4SLinus Torvalds }
2021da177e4SLinus Torvalds
203e95a1b65SRussell King #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL)
204e95a1b65SRussell King #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL)
2051da177e4SLinus Torvalds
2061da177e4SLinus Torvalds #ifdef USE_DMAC
207ffd7858dSRussell King #define dmac_read(host,reg) \
208e95a1b65SRussell King readb((host)->base + DMAC_OFFSET + ((reg) << 2))
2091da177e4SLinus Torvalds
210ffd7858dSRussell King #define dmac_write(host,reg,value) \
211e95a1b65SRussell King ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); })
2121da177e4SLinus Torvalds
213e95a1b65SRussell King #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG)
2141da177e4SLinus Torvalds
dmac_address(AS_Host * host)215ffd7858dSRussell King static inline unsigned int dmac_address(AS_Host *host)
2161da177e4SLinus Torvalds {
217ffd7858dSRussell King return dmac_read(host, DMAC_TXADRHI) << 16 |
218ffd7858dSRussell King dmac_read(host, DMAC_TXADRMD) << 8 |
219ffd7858dSRussell King dmac_read(host, DMAC_TXADRLO);
2201da177e4SLinus Torvalds }
2211da177e4SLinus Torvalds
2221da177e4SLinus Torvalds static
acornscsi_dumpdma(AS_Host * host,char * where)2231da177e4SLinus Torvalds void acornscsi_dumpdma(AS_Host *host, char *where)
2241da177e4SLinus Torvalds {
2251da177e4SLinus Torvalds unsigned int mode, addr, len;
2261da177e4SLinus Torvalds
227ffd7858dSRussell King mode = dmac_read(host, DMAC_MODECON);
228ffd7858dSRussell King addr = dmac_address(host);
229ffd7858dSRussell King len = dmac_read(host, DMAC_TXCNTHI) << 8 |
230ffd7858dSRussell King dmac_read(host, DMAC_TXCNTLO);
2311da177e4SLinus Torvalds
2321da177e4SLinus Torvalds printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ",
2331da177e4SLinus Torvalds host->host->host_no, where,
2341da177e4SLinus Torvalds mode, addr, (len + 1) & 0xffff,
235ffd7858dSRussell King dmac_read(host, DMAC_MASKREG));
2361da177e4SLinus Torvalds
2371da177e4SLinus Torvalds printk("DMA @%06x, ", host->dma.start_addr);
2381da177e4SLinus Torvalds printk("BH @%p +%04x, ", host->scsi.SCp.ptr,
2391da177e4SLinus Torvalds host->scsi.SCp.this_residual);
2401da177e4SLinus Torvalds printk("DT @+%04x ST @+%04x", host->dma.transferred,
2411da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred);
2421da177e4SLinus Torvalds printk("\n");
2431da177e4SLinus Torvalds }
2441da177e4SLinus Torvalds #endif
2451da177e4SLinus Torvalds
2461da177e4SLinus Torvalds static
acornscsi_sbic_xfcount(AS_Host * host)2471da177e4SLinus Torvalds unsigned long acornscsi_sbic_xfcount(AS_Host *host)
2481da177e4SLinus Torvalds {
2491da177e4SLinus Torvalds unsigned long length;
2501da177e4SLinus Torvalds
251ffd7858dSRussell King length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16;
252ffd7858dSRussell King length |= sbic_arm_readnext(host) << 8;
253ffd7858dSRussell King length |= sbic_arm_readnext(host);
2541da177e4SLinus Torvalds
2551da177e4SLinus Torvalds return length;
2561da177e4SLinus Torvalds }
2571da177e4SLinus Torvalds
2581da177e4SLinus Torvalds static int
acornscsi_sbic_wait(AS_Host * host,int stat_mask,int stat,int timeout,char * msg)2591da177e4SLinus Torvalds acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg)
2601da177e4SLinus Torvalds {
2611da177e4SLinus Torvalds int asr;
2621da177e4SLinus Torvalds
2631da177e4SLinus Torvalds do {
264ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
2651da177e4SLinus Torvalds
2661da177e4SLinus Torvalds if ((asr & stat_mask) == stat)
2671da177e4SLinus Torvalds return 0;
2681da177e4SLinus Torvalds
2691da177e4SLinus Torvalds udelay(1);
2701da177e4SLinus Torvalds } while (--timeout);
2711da177e4SLinus Torvalds
2721da177e4SLinus Torvalds printk("scsi%d: timeout while %s\n", host->host->host_no, msg);
2731da177e4SLinus Torvalds
2741da177e4SLinus Torvalds return -1;
2751da177e4SLinus Torvalds }
2761da177e4SLinus Torvalds
2771da177e4SLinus Torvalds static
acornscsi_sbic_issuecmd(AS_Host * host,int command)2781da177e4SLinus Torvalds int acornscsi_sbic_issuecmd(AS_Host *host, int command)
2791da177e4SLinus Torvalds {
2801da177e4SLinus Torvalds if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command"))
2811da177e4SLinus Torvalds return -1;
2821da177e4SLinus Torvalds
283ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, command);
2841da177e4SLinus Torvalds
2851da177e4SLinus Torvalds return 0;
2861da177e4SLinus Torvalds }
2871da177e4SLinus Torvalds
2881da177e4SLinus Torvalds static void
acornscsi_csdelay(unsigned int cs)2891da177e4SLinus Torvalds acornscsi_csdelay(unsigned int cs)
2901da177e4SLinus Torvalds {
2911da177e4SLinus Torvalds unsigned long target_jiffies, flags;
2921da177e4SLinus Torvalds
2931da177e4SLinus Torvalds target_jiffies = jiffies + 1 + cs * HZ / 100;
2941da177e4SLinus Torvalds
2951da177e4SLinus Torvalds local_save_flags(flags);
2961da177e4SLinus Torvalds local_irq_enable();
2971da177e4SLinus Torvalds
2981da177e4SLinus Torvalds while (time_before(jiffies, target_jiffies)) barrier();
2991da177e4SLinus Torvalds
3001da177e4SLinus Torvalds local_irq_restore(flags);
3011da177e4SLinus Torvalds }
3021da177e4SLinus Torvalds
3031da177e4SLinus Torvalds static
acornscsi_resetcard(AS_Host * host)3041da177e4SLinus Torvalds void acornscsi_resetcard(AS_Host *host)
3051da177e4SLinus Torvalds {
3061da177e4SLinus Torvalds unsigned int i, timeout;
3071da177e4SLinus Torvalds
3081da177e4SLinus Torvalds /* assert reset line */
3091da177e4SLinus Torvalds host->card.page_reg = 0x80;
310e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG);
3111da177e4SLinus Torvalds
3121da177e4SLinus Torvalds /* wait 3 cs. SCSI standard says 25ms. */
3131da177e4SLinus Torvalds acornscsi_csdelay(3);
3141da177e4SLinus Torvalds
3151da177e4SLinus Torvalds host->card.page_reg = 0;
316e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG);
3171da177e4SLinus Torvalds
3181da177e4SLinus Torvalds /*
3191da177e4SLinus Torvalds * Should get a reset from the card
3201da177e4SLinus Torvalds */
3211da177e4SLinus Torvalds timeout = 1000;
3221da177e4SLinus Torvalds do {
323e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8)
3241da177e4SLinus Torvalds break;
3251da177e4SLinus Torvalds udelay(1);
3261da177e4SLinus Torvalds } while (--timeout);
3271da177e4SLinus Torvalds
3281da177e4SLinus Torvalds if (timeout == 0)
3291da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n",
3301da177e4SLinus Torvalds host->host->host_no);
3311da177e4SLinus Torvalds
332ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR);
333ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR);
3341da177e4SLinus Torvalds
3351da177e4SLinus Torvalds /* setup sbic - WD33C93A */
336ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id);
337ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET);
3381da177e4SLinus Torvalds
3391da177e4SLinus Torvalds /*
3401da177e4SLinus Torvalds * Command should cause a reset interrupt
3411da177e4SLinus Torvalds */
3421da177e4SLinus Torvalds timeout = 1000;
3431da177e4SLinus Torvalds do {
344e95a1b65SRussell King if (readb(host->fast + INT_REG) & 8)
3451da177e4SLinus Torvalds break;
3461da177e4SLinus Torvalds udelay(1);
3471da177e4SLinus Torvalds } while (--timeout);
3481da177e4SLinus Torvalds
3491da177e4SLinus Torvalds if (timeout == 0)
3501da177e4SLinus Torvalds printk("scsi%d: timeout while resetting card\n",
3511da177e4SLinus Torvalds host->host->host_no);
3521da177e4SLinus Torvalds
353ffd7858dSRussell King sbic_arm_read(host, SBIC_ASR);
354ffd7858dSRussell King if (sbic_arm_read(host, SBIC_SSR) != 0x01)
3551da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n",
3561da177e4SLinus Torvalds host->host->host_no);
3571da177e4SLinus Torvalds
358ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
359ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
360ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
361ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
3621da177e4SLinus Torvalds
3631da177e4SLinus Torvalds host->card.page_reg = 0x40;
364e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG);
3651da177e4SLinus Torvalds
3661da177e4SLinus Torvalds /* setup dmac - uPC71071 */
367ffd7858dSRussell King dmac_write(host, DMAC_INIT, 0);
3681da177e4SLinus Torvalds #ifdef USE_DMAC
369ffd7858dSRussell King dmac_write(host, DMAC_INIT, INIT_8BIT);
370ffd7858dSRussell King dmac_write(host, DMAC_CHANNEL, CHANNEL_0);
371ffd7858dSRussell King dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0);
372ffd7858dSRussell King dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1);
3731da177e4SLinus Torvalds #endif
3741da177e4SLinus Torvalds
3751da177e4SLinus Torvalds host->SCpnt = NULL;
3761da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE;
3771da177e4SLinus Torvalds host->scsi.disconnectable = 0;
3781da177e4SLinus Torvalds
3791da177e4SLinus Torvalds memset(host->busyluns, 0, sizeof(host->busyluns));
3801da177e4SLinus Torvalds
3811da177e4SLinus Torvalds for (i = 0; i < 8; i++) {
3821da177e4SLinus Torvalds host->device[i].sync_state = SYNC_NEGOCIATE;
3831da177e4SLinus Torvalds host->device[i].disconnect_ok = 1;
3841da177e4SLinus Torvalds }
3851da177e4SLinus Torvalds
3861da177e4SLinus Torvalds /* wait 25 cs. SCSI standard says 250ms. */
3871da177e4SLinus Torvalds acornscsi_csdelay(25);
3881da177e4SLinus Torvalds }
3891da177e4SLinus Torvalds
3901da177e4SLinus Torvalds /*=============================================================================================
3911da177e4SLinus Torvalds * Utility routines (eg. debug)
3921da177e4SLinus Torvalds */
3931da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS
3941da177e4SLinus Torvalds static char *acornscsi_interrupttype[] = {
3951da177e4SLinus Torvalds "rst", "suc", "p/a", "3",
3961da177e4SLinus Torvalds "term", "5", "6", "7",
3971da177e4SLinus Torvalds "serv", "9", "a", "b",
3981da177e4SLinus Torvalds "c", "d", "e", "f"
3991da177e4SLinus Torvalds };
4001da177e4SLinus Torvalds
4011da177e4SLinus Torvalds static signed char acornscsi_map[] = {
4021da177e4SLinus Torvalds 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4031da177e4SLinus Torvalds -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11,
4041da177e4SLinus Torvalds 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11,
4051da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4061da177e4SLinus Torvalds 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11,
4071da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4081da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4091da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4101da177e4SLinus Torvalds 21, 22, -1, -1, -1, 23, -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 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
4171da177e4SLinus Torvalds -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
4181da177e4SLinus Torvalds };
4191da177e4SLinus Torvalds
4201da177e4SLinus Torvalds static char *acornscsi_interruptcode[] = {
4211da177e4SLinus Torvalds /* 0 */
4221da177e4SLinus Torvalds "reset - normal mode", /* 00 */
4231da177e4SLinus Torvalds "reset - advanced mode", /* 01 */
4241da177e4SLinus Torvalds
4251da177e4SLinus Torvalds /* 2 */
4261da177e4SLinus Torvalds "sel", /* 11 */
4271da177e4SLinus Torvalds "sel+xfer", /* 16 */
4281da177e4SLinus Torvalds "data-out", /* 18 */
4291da177e4SLinus Torvalds "data-in", /* 19 */
4301da177e4SLinus Torvalds "cmd", /* 1A */
4311da177e4SLinus Torvalds "stat", /* 1B */
4321da177e4SLinus Torvalds "??-out", /* 1C */
4331da177e4SLinus Torvalds "??-in", /* 1D */
4341da177e4SLinus Torvalds "msg-out", /* 1E */
4351da177e4SLinus Torvalds "msg-in", /* 1F */
4361da177e4SLinus Torvalds
4371da177e4SLinus Torvalds /* 12 */
4381da177e4SLinus Torvalds "/ACK asserted", /* 20 */
4391da177e4SLinus Torvalds "save-data-ptr", /* 21 */
4401da177e4SLinus Torvalds "{re}sel", /* 22 */
4411da177e4SLinus Torvalds
4421da177e4SLinus Torvalds /* 15 */
4431da177e4SLinus Torvalds "inv cmd", /* 40 */
4441da177e4SLinus Torvalds "unexpected disconnect", /* 41 */
4451da177e4SLinus Torvalds "sel timeout", /* 42 */
4461da177e4SLinus Torvalds "P err", /* 43 */
4471da177e4SLinus Torvalds "P err+ATN", /* 44 */
4481da177e4SLinus Torvalds "bad status byte", /* 47 */
4491da177e4SLinus Torvalds
4501da177e4SLinus Torvalds /* 21 */
4511da177e4SLinus Torvalds "resel, no id", /* 80 */
4521da177e4SLinus Torvalds "resel", /* 81 */
4531da177e4SLinus Torvalds "discon", /* 85 */
4541da177e4SLinus Torvalds };
4551da177e4SLinus Torvalds
4561da177e4SLinus Torvalds static
print_scsi_status(unsigned int ssr)4571da177e4SLinus Torvalds void print_scsi_status(unsigned int ssr)
4581da177e4SLinus Torvalds {
4591da177e4SLinus Torvalds if (acornscsi_map[ssr] != -1)
4601da177e4SLinus Torvalds printk("%s:%s",
4611da177e4SLinus Torvalds acornscsi_interrupttype[(ssr >> 4)],
4621da177e4SLinus Torvalds acornscsi_interruptcode[acornscsi_map[ssr]]);
4631da177e4SLinus Torvalds else
4641da177e4SLinus Torvalds printk("%X:%X", ssr >> 4, ssr & 0x0f);
4651da177e4SLinus Torvalds }
4661da177e4SLinus Torvalds #endif
4671da177e4SLinus Torvalds
4681da177e4SLinus Torvalds static
print_sbic_status(int asr,int ssr,int cmdphase)4691da177e4SLinus Torvalds void print_sbic_status(int asr, int ssr, int cmdphase)
4701da177e4SLinus Torvalds {
4711da177e4SLinus Torvalds #ifdef CONFIG_ACORNSCSI_CONSTANTS
4721da177e4SLinus Torvalds printk("sbic: %c%c%c%c%c%c ",
4731da177e4SLinus Torvalds asr & ASR_INT ? 'I' : 'i',
4741da177e4SLinus Torvalds asr & ASR_LCI ? 'L' : 'l',
4751da177e4SLinus Torvalds asr & ASR_BSY ? 'B' : 'b',
4761da177e4SLinus Torvalds asr & ASR_CIP ? 'C' : 'c',
4771da177e4SLinus Torvalds asr & ASR_PE ? 'P' : 'p',
4781da177e4SLinus Torvalds asr & ASR_DBR ? 'D' : 'd');
4791da177e4SLinus Torvalds printk("scsi: ");
4801da177e4SLinus Torvalds print_scsi_status(ssr);
4811da177e4SLinus Torvalds printk(" ph %02X\n", cmdphase);
4821da177e4SLinus Torvalds #else
4831da177e4SLinus Torvalds printk("sbic: %02X scsi: %X:%X ph: %02X\n",
4841da177e4SLinus Torvalds asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase);
4851da177e4SLinus Torvalds #endif
4861da177e4SLinus Torvalds }
4871da177e4SLinus Torvalds
4881da177e4SLinus Torvalds static void
acornscsi_dumplogline(AS_Host * host,int target,int line)4891da177e4SLinus Torvalds acornscsi_dumplogline(AS_Host *host, int target, int line)
4901da177e4SLinus Torvalds {
4911da177e4SLinus Torvalds unsigned long prev;
4921da177e4SLinus Torvalds signed int ptr;
4931da177e4SLinus Torvalds
4941da177e4SLinus Torvalds ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT;
4951da177e4SLinus Torvalds if (ptr < 0)
4961da177e4SLinus Torvalds ptr += STATUS_BUFFER_SIZE;
4971da177e4SLinus Torvalds
4981da177e4SLinus Torvalds printk("%c: %3s:", target == 8 ? 'H' : '0' + target,
4991da177e4SLinus Torvalds line == 0 ? "ph" : line == 1 ? "ssr" : "int");
5001da177e4SLinus Torvalds
5011da177e4SLinus Torvalds prev = host->status[target][ptr].when;
5021da177e4SLinus Torvalds
5031da177e4SLinus Torvalds for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
5041da177e4SLinus Torvalds unsigned long time_diff;
5051da177e4SLinus Torvalds
5061da177e4SLinus Torvalds if (!host->status[target][ptr].when)
5071da177e4SLinus Torvalds continue;
5081da177e4SLinus Torvalds
5091da177e4SLinus Torvalds switch (line) {
5101da177e4SLinus Torvalds case 0:
5111da177e4SLinus Torvalds printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ',
5121da177e4SLinus Torvalds host->status[target][ptr].ph);
5131da177e4SLinus Torvalds break;
5141da177e4SLinus Torvalds
5151da177e4SLinus Torvalds case 1:
5161da177e4SLinus Torvalds printk(" %02X", host->status[target][ptr].ssr);
5171da177e4SLinus Torvalds break;
5181da177e4SLinus Torvalds
5191da177e4SLinus Torvalds case 2:
5201da177e4SLinus Torvalds time_diff = host->status[target][ptr].when - prev;
5211da177e4SLinus Torvalds prev = host->status[target][ptr].when;
5221da177e4SLinus Torvalds if (time_diff == 0)
5231da177e4SLinus Torvalds printk("==^");
5241da177e4SLinus Torvalds else if (time_diff >= 100)
5251da177e4SLinus Torvalds printk(" ");
5261da177e4SLinus Torvalds else
5271da177e4SLinus Torvalds printk(" %02ld", time_diff);
5281da177e4SLinus Torvalds break;
5291da177e4SLinus Torvalds }
5301da177e4SLinus Torvalds }
5311da177e4SLinus Torvalds
5321da177e4SLinus Torvalds printk("\n");
5331da177e4SLinus Torvalds }
5341da177e4SLinus Torvalds
5351da177e4SLinus Torvalds static
acornscsi_dumplog(AS_Host * host,int target)5361da177e4SLinus Torvalds void acornscsi_dumplog(AS_Host *host, int target)
5371da177e4SLinus Torvalds {
5381da177e4SLinus Torvalds do {
5391da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 0);
5401da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 1);
5411da177e4SLinus Torvalds acornscsi_dumplogline(host, target, 2);
5421da177e4SLinus Torvalds
5431da177e4SLinus Torvalds if (target == 8)
5441da177e4SLinus Torvalds break;
5451da177e4SLinus Torvalds
5461da177e4SLinus Torvalds target = 8;
5471da177e4SLinus Torvalds } while (1);
5481da177e4SLinus Torvalds }
5491da177e4SLinus Torvalds
5501da177e4SLinus Torvalds static
acornscsi_target(AS_Host * host)5511da177e4SLinus Torvalds char acornscsi_target(AS_Host *host)
5521da177e4SLinus Torvalds {
5531da177e4SLinus Torvalds if (host->SCpnt)
5541da177e4SLinus Torvalds return '0' + host->SCpnt->device->id;
5551da177e4SLinus Torvalds return 'H';
5561da177e4SLinus Torvalds }
5571da177e4SLinus Torvalds
5581da177e4SLinus Torvalds /*
5591da177e4SLinus Torvalds * Prototype: cmdtype_t acornscsi_cmdtype(int command)
5601da177e4SLinus Torvalds * Purpose : differentiate READ from WRITE from other commands
5611da177e4SLinus Torvalds * Params : command - command to interpret
5621da177e4SLinus Torvalds * Returns : CMD_READ - command reads data,
5631da177e4SLinus Torvalds * CMD_WRITE - command writes data,
5641da177e4SLinus Torvalds * CMD_MISC - everything else
5651da177e4SLinus Torvalds */
5661da177e4SLinus Torvalds static inline
acornscsi_cmdtype(int command)5671da177e4SLinus Torvalds cmdtype_t acornscsi_cmdtype(int command)
5681da177e4SLinus Torvalds {
5691da177e4SLinus Torvalds switch (command) {
5701da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_12:
5711da177e4SLinus Torvalds return CMD_WRITE;
5721da177e4SLinus Torvalds case READ_6: case READ_10: case READ_12:
5731da177e4SLinus Torvalds return CMD_READ;
5741da177e4SLinus Torvalds default:
5751da177e4SLinus Torvalds return CMD_MISC;
5761da177e4SLinus Torvalds }
5771da177e4SLinus Torvalds }
5781da177e4SLinus Torvalds
5791da177e4SLinus Torvalds /*
5801da177e4SLinus Torvalds * Prototype: int acornscsi_datadirection(int command)
5811da177e4SLinus Torvalds * Purpose : differentiate between commands that have a DATA IN phase
5821da177e4SLinus Torvalds * and a DATA OUT phase
5831da177e4SLinus Torvalds * Params : command - command to interpret
5841da177e4SLinus Torvalds * Returns : DATADIR_OUT - data out phase expected
5851da177e4SLinus Torvalds * DATADIR_IN - data in phase expected
5861da177e4SLinus Torvalds */
5871da177e4SLinus Torvalds static
acornscsi_datadirection(int command)5881da177e4SLinus Torvalds datadir_t acornscsi_datadirection(int command)
5891da177e4SLinus Torvalds {
5901da177e4SLinus Torvalds switch (command) {
5911da177e4SLinus Torvalds case CHANGE_DEFINITION: case COMPARE: case COPY:
5921da177e4SLinus Torvalds case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT:
5931da177e4SLinus Torvalds case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER:
5941da177e4SLinus Torvalds case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE:
5951da177e4SLinus Torvalds case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW:
5961da177e4SLinus Torvalds case WRITE_6: case WRITE_10: case WRITE_VERIFY:
5971da177e4SLinus Torvalds case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME:
5981da177e4SLinus Torvalds case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12:
5991da177e4SLinus Torvalds case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW:
6001da177e4SLinus Torvalds case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea:
6011da177e4SLinus Torvalds return DATADIR_OUT;
6021da177e4SLinus Torvalds default:
6031da177e4SLinus Torvalds return DATADIR_IN;
6041da177e4SLinus Torvalds }
6051da177e4SLinus Torvalds }
6061da177e4SLinus Torvalds
6071da177e4SLinus Torvalds /*
6081da177e4SLinus Torvalds * Purpose : provide values for synchronous transfers with 33C93.
6091da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
6101da177e4SLinus Torvalds * Modified by Russell King for 8MHz WD33C93A
6111da177e4SLinus Torvalds */
6121da177e4SLinus Torvalds static struct sync_xfer_tbl {
6131da177e4SLinus Torvalds unsigned int period_ns;
6141da177e4SLinus Torvalds unsigned char reg_value;
6151da177e4SLinus Torvalds } sync_xfer_table[] = {
6161da177e4SLinus Torvalds { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 },
6171da177e4SLinus Torvalds { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 },
6181da177e4SLinus Torvalds { 874, 0x70 }, { 999, 0x00 }, { 0, 0 }
6191da177e4SLinus Torvalds };
6201da177e4SLinus Torvalds
6211da177e4SLinus Torvalds /*
6221da177e4SLinus Torvalds * Prototype: int acornscsi_getperiod(unsigned char syncxfer)
6231da177e4SLinus Torvalds * Purpose : period for the synchronous transfer setting
6241da177e4SLinus Torvalds * Params : syncxfer SYNCXFER register value
6251da177e4SLinus Torvalds * Returns : period in ns.
6261da177e4SLinus Torvalds */
6271da177e4SLinus Torvalds static
acornscsi_getperiod(unsigned char syncxfer)6281da177e4SLinus Torvalds int acornscsi_getperiod(unsigned char syncxfer)
6291da177e4SLinus Torvalds {
6301da177e4SLinus Torvalds int i;
6311da177e4SLinus Torvalds
6321da177e4SLinus Torvalds syncxfer &= 0xf0;
6331da177e4SLinus Torvalds if (syncxfer == 0x10)
6341da177e4SLinus Torvalds syncxfer = 0;
6351da177e4SLinus Torvalds
6361da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++)
6371da177e4SLinus Torvalds if (syncxfer == sync_xfer_table[i].reg_value)
6381da177e4SLinus Torvalds return sync_xfer_table[i].period_ns;
6391da177e4SLinus Torvalds return 0;
6401da177e4SLinus Torvalds }
6411da177e4SLinus Torvalds
6421da177e4SLinus Torvalds /*
6431da177e4SLinus Torvalds * Prototype: int round_period(unsigned int period)
6441da177e4SLinus Torvalds * Purpose : return index into above table for a required REQ period
6451da177e4SLinus Torvalds * Params : period - time (ns) for REQ
6461da177e4SLinus Torvalds * Returns : table index
6471da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
6481da177e4SLinus Torvalds */
6491da177e4SLinus Torvalds static inline
round_period(unsigned int period)6501da177e4SLinus Torvalds int round_period(unsigned int period)
6511da177e4SLinus Torvalds {
6521da177e4SLinus Torvalds int i;
6531da177e4SLinus Torvalds
6541da177e4SLinus Torvalds for (i = 1; sync_xfer_table[i].period_ns; i++) {
6551da177e4SLinus Torvalds if ((period <= sync_xfer_table[i].period_ns) &&
6561da177e4SLinus Torvalds (period > sync_xfer_table[i - 1].period_ns))
6571da177e4SLinus Torvalds return i;
6581da177e4SLinus Torvalds }
6591da177e4SLinus Torvalds return 7;
6601da177e4SLinus Torvalds }
6611da177e4SLinus Torvalds
6621da177e4SLinus Torvalds /*
6631da177e4SLinus Torvalds * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
6641da177e4SLinus Torvalds * Purpose : calculate value for 33c93s SYNC register
6651da177e4SLinus Torvalds * Params : period - time (ns) for REQ
6661da177e4SLinus Torvalds * offset - offset in bytes between REQ/ACK
6671da177e4SLinus Torvalds * Returns : value for SYNC register
6681da177e4SLinus Torvalds * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
6691da177e4SLinus Torvalds */
6701da177e4SLinus Torvalds static
calc_sync_xfer(unsigned int period,unsigned int offset)6716fea7f6fSArnd Bergmann unsigned char __maybe_unused calc_sync_xfer(unsigned int period,
6726fea7f6fSArnd Bergmann unsigned int offset)
6731da177e4SLinus Torvalds {
6741da177e4SLinus Torvalds return sync_xfer_table[round_period(period)].reg_value |
6751da177e4SLinus Torvalds ((offset < SDTR_SIZE) ? offset : SDTR_SIZE);
6761da177e4SLinus Torvalds }
6771da177e4SLinus Torvalds
6781da177e4SLinus Torvalds /* ====================================================================================
6791da177e4SLinus Torvalds * Command functions
6801da177e4SLinus Torvalds */
6811da177e4SLinus Torvalds /*
6821da177e4SLinus Torvalds * Function: acornscsi_kick(AS_Host *host)
6831da177e4SLinus Torvalds * Purpose : kick next command to interface
6841da177e4SLinus Torvalds * Params : host - host to send command to
6851da177e4SLinus Torvalds * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING
6861da177e4SLinus Torvalds * Notes : interrupts are always disabled!
6871da177e4SLinus Torvalds */
6881da177e4SLinus Torvalds static
acornscsi_kick(AS_Host * host)6891da177e4SLinus Torvalds intr_ret_t acornscsi_kick(AS_Host *host)
6901da177e4SLinus Torvalds {
6911da177e4SLinus Torvalds int from_queue = 0;
692ee0ca6baSHenne struct scsi_cmnd *SCpnt;
6931da177e4SLinus Torvalds
6941da177e4SLinus Torvalds /* first check to see if a command is waiting to be executed */
6951da177e4SLinus Torvalds SCpnt = host->origSCpnt;
6961da177e4SLinus Torvalds host->origSCpnt = NULL;
6971da177e4SLinus Torvalds
6981da177e4SLinus Torvalds /* retrieve next command */
6991da177e4SLinus Torvalds if (!SCpnt) {
7001da177e4SLinus Torvalds SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns);
7011da177e4SLinus Torvalds if (!SCpnt)
7021da177e4SLinus Torvalds return INTR_IDLE;
7031da177e4SLinus Torvalds
7041da177e4SLinus Torvalds from_queue = 1;
7051da177e4SLinus Torvalds }
7061da177e4SLinus Torvalds
7071da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) {
7081da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
7091da177e4SLinus Torvalds host->scsi.disconnectable = 0;
7101da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
7111da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n",
7121da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)));
7131da177e4SLinus Torvalds #endif
7141da177e4SLinus Torvalds host->SCpnt = NULL;
7151da177e4SLinus Torvalds }
7161da177e4SLinus Torvalds
7171da177e4SLinus Torvalds /*
7181da177e4SLinus Torvalds * If we have an interrupt pending, then we may have been reselected.
7191da177e4SLinus Torvalds * In this case, we don't want to write to the registers
7201da177e4SLinus Torvalds */
721ffd7858dSRussell King if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) {
722ffd7858dSRussell King sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id);
723ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN);
7241da177e4SLinus Torvalds }
7251da177e4SLinus Torvalds
7261da177e4SLinus Torvalds /*
7271da177e4SLinus Torvalds * claim host busy - all of these must happen atomically wrt
7281da177e4SLinus Torvalds * our interrupt routine. Failure means command loss.
7291da177e4SLinus Torvalds */
7301da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTING;
7311da177e4SLinus Torvalds host->SCpnt = SCpnt;
732dc417545SBart Van Assche host->scsi.SCp = *arm_scsi_pointer(SCpnt);
7331da177e4SLinus Torvalds host->dma.xfer_setup = 0;
7341da177e4SLinus Torvalds host->dma.xfer_required = 0;
7351da177e4SLinus Torvalds host->dma.xfer_done = 0;
7361da177e4SLinus Torvalds
7371da177e4SLinus Torvalds #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT))
7381da177e4SLinus Torvalds DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n",
7391da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id,
7401da177e4SLinus Torvalds SCpnt->cmnd[0]));
7411da177e4SLinus Torvalds #endif
7421da177e4SLinus Torvalds
7431da177e4SLinus Torvalds if (from_queue) {
7449cb78c16SHannes Reinecke set_bit(SCpnt->device->id * 8 +
7459cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x07), host->busyluns);
7461da177e4SLinus Torvalds
7471da177e4SLinus Torvalds host->stats.removes += 1;
7481da177e4SLinus Torvalds
7491da177e4SLinus Torvalds switch (acornscsi_cmdtype(SCpnt->cmnd[0])) {
7501da177e4SLinus Torvalds case CMD_WRITE:
7511da177e4SLinus Torvalds host->stats.writes += 1;
7521da177e4SLinus Torvalds break;
7531da177e4SLinus Torvalds case CMD_READ:
7541da177e4SLinus Torvalds host->stats.reads += 1;
7551da177e4SLinus Torvalds break;
7561da177e4SLinus Torvalds case CMD_MISC:
7571da177e4SLinus Torvalds host->stats.miscs += 1;
7581da177e4SLinus Torvalds break;
7591da177e4SLinus Torvalds }
7601da177e4SLinus Torvalds }
7611da177e4SLinus Torvalds
7621da177e4SLinus Torvalds return INTR_PROCESSING;
7631da177e4SLinus Torvalds }
7641da177e4SLinus Torvalds
7651da177e4SLinus Torvalds /*
766ee0ca6baSHenne * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result)
7671da177e4SLinus Torvalds * Purpose : complete processing for command
7681da177e4SLinus Torvalds * Params : host - interface that completed
7691da177e4SLinus Torvalds * result - driver byte of result
7701da177e4SLinus Torvalds */
acornscsi_done(AS_Host * host,struct scsi_cmnd ** SCpntp,unsigned int result)771ee0ca6baSHenne static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
772ee0ca6baSHenne unsigned int result)
7731da177e4SLinus Torvalds {
774ee0ca6baSHenne struct scsi_cmnd *SCpnt = *SCpntp;
7751da177e4SLinus Torvalds
7761da177e4SLinus Torvalds /* clean up */
777ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
7781da177e4SLinus Torvalds
7791da177e4SLinus Torvalds host->stats.fins += 1;
7801da177e4SLinus Torvalds
7811da177e4SLinus Torvalds if (SCpnt) {
7821da177e4SLinus Torvalds *SCpntp = NULL;
7831da177e4SLinus Torvalds
7841da177e4SLinus Torvalds acornscsi_dma_cleanup(host);
7851da177e4SLinus Torvalds
786a9d2d806SHannes Reinecke set_host_byte(SCpnt, result);
787a9d2d806SHannes Reinecke if (result == DID_OK)
788a9d2d806SHannes Reinecke scsi_msg_to_host_byte(SCpnt, host->scsi.SCp.Message);
789a9d2d806SHannes Reinecke set_status_byte(SCpnt, host->scsi.SCp.Status);
7901da177e4SLinus Torvalds
7911da177e4SLinus Torvalds /*
7921da177e4SLinus Torvalds * In theory, this should not happen. In practice, it seems to.
7931da177e4SLinus Torvalds * Only trigger an error if the device attempts to report all happy
7941da177e4SLinus Torvalds * but with untransferred buffers... If we don't do something, then
7951da177e4SLinus Torvalds * data loss will occur. Should we check SCpnt->underflow here?
7961da177e4SLinus Torvalds * It doesn't appear to be set to something meaningful by the higher
7971da177e4SLinus Torvalds * levels all the time.
7981da177e4SLinus Torvalds */
7991da177e4SLinus Torvalds if (result == DID_OK) {
8001da177e4SLinus Torvalds int xfer_warn = 0;
8011da177e4SLinus Torvalds
8021da177e4SLinus Torvalds if (SCpnt->underflow == 0) {
8031da177e4SLinus Torvalds if (host->scsi.SCp.ptr &&
8041da177e4SLinus Torvalds acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC)
8051da177e4SLinus Torvalds xfer_warn = 1;
8061da177e4SLinus Torvalds } else {
8071da177e4SLinus Torvalds if (host->scsi.SCp.scsi_xferred < SCpnt->underflow ||
8081da177e4SLinus Torvalds host->scsi.SCp.scsi_xferred != host->dma.transferred)
8091da177e4SLinus Torvalds xfer_warn = 1;
8101da177e4SLinus Torvalds }
8111da177e4SLinus Torvalds
8121da177e4SLinus Torvalds /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6)
8131da177e4SLinus Torvalds * Targets which break data transfers into multiple
8141da177e4SLinus Torvalds * connections shall end each successful connection
8151da177e4SLinus Torvalds * (except possibly the last) with a SAVE DATA
8161da177e4SLinus Torvalds * POINTER - DISCONNECT message sequence.
8171da177e4SLinus Torvalds *
8181da177e4SLinus Torvalds * This makes it difficult to ensure that a transfer has
8191da177e4SLinus Torvalds * completed. If we reach the end of a transfer during
8201da177e4SLinus Torvalds * the command, then we can only have finished the transfer.
8211da177e4SLinus Torvalds * therefore, if we seem to have some data remaining, this
8221da177e4SLinus Torvalds * is not a problem.
8231da177e4SLinus Torvalds */
8241da177e4SLinus Torvalds if (host->dma.xfer_done)
8251da177e4SLinus Torvalds xfer_warn = 0;
8261da177e4SLinus Torvalds
8271da177e4SLinus Torvalds if (xfer_warn) {
828a9d2d806SHannes Reinecke switch (get_status_byte(SCpnt)) {
829a9d2d806SHannes Reinecke case SAM_STAT_CHECK_CONDITION:
830a9d2d806SHannes Reinecke case SAM_STAT_COMMAND_TERMINATED:
831a9d2d806SHannes Reinecke case SAM_STAT_BUSY:
832a9d2d806SHannes Reinecke case SAM_STAT_TASK_SET_FULL:
833a9d2d806SHannes Reinecke case SAM_STAT_RESERVATION_CONFLICT:
8341da177e4SLinus Torvalds break;
8351da177e4SLinus Torvalds
8361da177e4SLinus Torvalds default:
8372e120a57SHannes Reinecke scmd_printk(KERN_ERR, SCpnt,
8382e120a57SHannes Reinecke "incomplete data transfer detected: "
8392e120a57SHannes Reinecke "result=%08X", SCpnt->result);
8402e120a57SHannes Reinecke scsi_print_command(SCpnt);
8411da177e4SLinus Torvalds acornscsi_dumpdma(host, "done");
8421da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id);
8432e120a57SHannes Reinecke set_host_byte(SCpnt, DID_ERROR);
8441da177e4SLinus Torvalds }
8451da177e4SLinus Torvalds }
8461da177e4SLinus Torvalds }
8471da177e4SLinus Torvalds
8489cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 +
8499cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns);
8501da177e4SLinus Torvalds
851396dd2c0SBart Van Assche scsi_done(SCpnt);
8521da177e4SLinus Torvalds } else
8531da177e4SLinus Torvalds printk("scsi%d: null command in acornscsi_done", host->host->host_no);
8541da177e4SLinus Torvalds
8551da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE;
8561da177e4SLinus Torvalds }
8571da177e4SLinus Torvalds
8581da177e4SLinus Torvalds /* ====================================================================================
8591da177e4SLinus Torvalds * DMA routines
8601da177e4SLinus Torvalds */
8611da177e4SLinus Torvalds /*
8621da177e4SLinus Torvalds * Purpose : update SCSI Data Pointer
8631da177e4SLinus Torvalds * Notes : this will only be one SG entry or less
8641da177e4SLinus Torvalds */
8651da177e4SLinus Torvalds static
acornscsi_data_updateptr(AS_Host * host,struct scsi_pointer * SCp,unsigned int length)8660a04137eSChristoph Hellwig void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length)
8671da177e4SLinus Torvalds {
8681da177e4SLinus Torvalds SCp->ptr += length;
8691da177e4SLinus Torvalds SCp->this_residual -= length;
8701da177e4SLinus Torvalds
8711da177e4SLinus Torvalds if (SCp->this_residual == 0 && next_SCp(SCp) == 0)
8721da177e4SLinus Torvalds host->dma.xfer_done = 1;
8731da177e4SLinus Torvalds }
8741da177e4SLinus Torvalds
8751da177e4SLinus Torvalds /*
8761da177e4SLinus Torvalds * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr,
8771da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length)
8781da177e4SLinus Torvalds * Purpose : read data from DMA RAM
8791da177e4SLinus Torvalds * Params : host - host to transfer from
8801da177e4SLinus Torvalds * ptr - DRAM address
8811da177e4SLinus Torvalds * start_addr - host mem address
8821da177e4SLinus Torvalds * length - number of bytes to transfer
8831da177e4SLinus Torvalds * Notes : this will only be one SG entry or less
8841da177e4SLinus Torvalds */
8851da177e4SLinus Torvalds static
acornscsi_data_read(AS_Host * host,char * ptr,unsigned int start_addr,unsigned int length)8861da177e4SLinus Torvalds void acornscsi_data_read(AS_Host *host, char *ptr,
8871da177e4SLinus Torvalds unsigned int start_addr, unsigned int length)
8881da177e4SLinus Torvalds {
889e95a1b65SRussell King extern void __acornscsi_in(void __iomem *, char *buf, int len);
8901da177e4SLinus Torvalds unsigned int page, offset, len = length;
8911da177e4SLinus Torvalds
8921da177e4SLinus Torvalds page = (start_addr >> 12);
8931da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1);
8941da177e4SLinus Torvalds
895e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
8961da177e4SLinus Torvalds
8971da177e4SLinus Torvalds while (len > 0) {
8981da177e4SLinus Torvalds unsigned int this_len;
8991da177e4SLinus Torvalds
9001da177e4SLinus Torvalds if (len + offset > (1 << 12))
9011da177e4SLinus Torvalds this_len = (1 << 12) - offset;
9021da177e4SLinus Torvalds else
9031da177e4SLinus Torvalds this_len = len;
9041da177e4SLinus Torvalds
905e95a1b65SRussell King __acornscsi_in(host->base + (offset << 1), ptr, this_len);
9061da177e4SLinus Torvalds
9071da177e4SLinus Torvalds offset += this_len;
9081da177e4SLinus Torvalds ptr += this_len;
9091da177e4SLinus Torvalds len -= this_len;
9101da177e4SLinus Torvalds
9111da177e4SLinus Torvalds if (offset == (1 << 12)) {
9121da177e4SLinus Torvalds offset = 0;
9131da177e4SLinus Torvalds page ++;
914e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
9151da177e4SLinus Torvalds }
9161da177e4SLinus Torvalds }
917e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG);
9181da177e4SLinus Torvalds }
9191da177e4SLinus Torvalds
9201da177e4SLinus Torvalds /*
9211da177e4SLinus Torvalds * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr,
9221da177e4SLinus Torvalds * unsigned int start_addr, unsigned int length)
9231da177e4SLinus Torvalds * Purpose : write data to DMA RAM
9241da177e4SLinus Torvalds * Params : host - host to transfer from
9251da177e4SLinus Torvalds * ptr - DRAM address
9261da177e4SLinus Torvalds * start_addr - host mem address
9271da177e4SLinus Torvalds * length - number of bytes to transfer
9281da177e4SLinus Torvalds * Notes : this will only be one SG entry or less
9291da177e4SLinus Torvalds */
9301da177e4SLinus Torvalds static
acornscsi_data_write(AS_Host * host,char * ptr,unsigned int start_addr,unsigned int length)9311da177e4SLinus Torvalds void acornscsi_data_write(AS_Host *host, char *ptr,
9321da177e4SLinus Torvalds unsigned int start_addr, unsigned int length)
9331da177e4SLinus Torvalds {
934e95a1b65SRussell King extern void __acornscsi_out(void __iomem *, char *buf, int len);
9351da177e4SLinus Torvalds unsigned int page, offset, len = length;
9361da177e4SLinus Torvalds
9371da177e4SLinus Torvalds page = (start_addr >> 12);
9381da177e4SLinus Torvalds offset = start_addr & ((1 << 12) - 1);
9391da177e4SLinus Torvalds
940e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
9411da177e4SLinus Torvalds
9421da177e4SLinus Torvalds while (len > 0) {
9431da177e4SLinus Torvalds unsigned int this_len;
9441da177e4SLinus Torvalds
9451da177e4SLinus Torvalds if (len + offset > (1 << 12))
9461da177e4SLinus Torvalds this_len = (1 << 12) - offset;
9471da177e4SLinus Torvalds else
9481da177e4SLinus Torvalds this_len = len;
9491da177e4SLinus Torvalds
950e95a1b65SRussell King __acornscsi_out(host->base + (offset << 1), ptr, this_len);
9511da177e4SLinus Torvalds
9521da177e4SLinus Torvalds offset += this_len;
9531da177e4SLinus Torvalds ptr += this_len;
9541da177e4SLinus Torvalds len -= this_len;
9551da177e4SLinus Torvalds
9561da177e4SLinus Torvalds if (offset == (1 << 12)) {
9571da177e4SLinus Torvalds offset = 0;
9581da177e4SLinus Torvalds page ++;
959e95a1b65SRussell King writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
9601da177e4SLinus Torvalds }
9611da177e4SLinus Torvalds }
962e95a1b65SRussell King writeb(host->card.page_reg, host->fast + PAGE_REG);
9631da177e4SLinus Torvalds }
9641da177e4SLinus Torvalds
9651da177e4SLinus Torvalds /* =========================================================================================
9661da177e4SLinus Torvalds * On-board DMA routines
9671da177e4SLinus Torvalds */
9681da177e4SLinus Torvalds #ifdef USE_DMAC
9691da177e4SLinus Torvalds /*
9701da177e4SLinus Torvalds * Prototype: void acornscsi_dmastop(AS_Host *host)
9711da177e4SLinus Torvalds * Purpose : stop all DMA
9721da177e4SLinus Torvalds * Params : host - host on which to stop DMA
9731da177e4SLinus Torvalds * Notes : This is called when leaving DATA IN/OUT phase,
9741da177e4SLinus Torvalds * or when interface is RESET
9751da177e4SLinus Torvalds */
9761da177e4SLinus Torvalds static inline
acornscsi_dma_stop(AS_Host * host)9771da177e4SLinus Torvalds void acornscsi_dma_stop(AS_Host *host)
9781da177e4SLinus Torvalds {
979ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON);
980ffd7858dSRussell King dmac_clearintr(host);
9811da177e4SLinus Torvalds
9821da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
9831da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "stop"));
9841da177e4SLinus Torvalds #endif
9851da177e4SLinus Torvalds }
9861da177e4SLinus Torvalds
9871da177e4SLinus Torvalds /*
9881da177e4SLinus Torvalds * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
9891da177e4SLinus Torvalds * Purpose : setup DMA controller for data transfer
9901da177e4SLinus Torvalds * Params : host - host to setup
9911da177e4SLinus Torvalds * direction - data transfer direction
9921da177e4SLinus Torvalds * Notes : This is called when entering DATA I/O phase, not
9931da177e4SLinus Torvalds * while we're in a DATA I/O phase
9941da177e4SLinus Torvalds */
9951da177e4SLinus Torvalds static
acornscsi_dma_setup(AS_Host * host,dmadir_t direction)9961da177e4SLinus Torvalds void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
9971da177e4SLinus Torvalds {
9981da177e4SLinus Torvalds unsigned int address, length, mode;
9991da177e4SLinus Torvalds
10001da177e4SLinus Torvalds host->dma.direction = direction;
10011da177e4SLinus Torvalds
1002ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON);
10031da177e4SLinus Torvalds
10041da177e4SLinus Torvalds if (direction == DMA_OUT) {
10051da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE)
10061da177e4SLinus Torvalds if (NO_WRITE & (1 << host->SCpnt->device->id)) {
10071da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n",
10081da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
10091da177e4SLinus Torvalds return;
10101da177e4SLinus Torvalds }
10111da177e4SLinus Torvalds #endif
10121da177e4SLinus Torvalds mode = DMAC_WRITE;
10131da177e4SLinus Torvalds } else
10141da177e4SLinus Torvalds mode = DMAC_READ;
10151da177e4SLinus Torvalds
10161da177e4SLinus Torvalds /*
10171da177e4SLinus Torvalds * Allocate some buffer space, limited to half the buffer size
10181da177e4SLinus Torvalds */
10191da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
10201da177e4SLinus Torvalds if (length) {
10211da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr;
10221da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) &
10231da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1);
10241da177e4SLinus Torvalds
10251da177e4SLinus Torvalds /*
10261da177e4SLinus Torvalds * Transfer data to DMA memory
10271da177e4SLinus Torvalds */
10281da177e4SLinus Torvalds if (direction == DMA_OUT)
10291da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
10301da177e4SLinus Torvalds length);
10311da177e4SLinus Torvalds
10321da177e4SLinus Torvalds length -= 1;
1033ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length);
1034ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8);
1035ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address);
1036ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8);
1037ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0);
1038ffd7858dSRussell King dmac_write(host, DMAC_MODECON, mode);
1039ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF);
10401da177e4SLinus Torvalds
10411da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
10421da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "strt"));
10431da177e4SLinus Torvalds #endif
10441da177e4SLinus Torvalds host->dma.xfer_setup = 1;
10451da177e4SLinus Torvalds }
10461da177e4SLinus Torvalds }
10471da177e4SLinus Torvalds
10481da177e4SLinus Torvalds /*
10491da177e4SLinus Torvalds * Function: void acornscsi_dma_cleanup(AS_Host *host)
10501da177e4SLinus Torvalds * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct
10511da177e4SLinus Torvalds * Params : host - host to finish
10521da177e4SLinus Torvalds * Notes : This is called when a command is:
10531125c70aSGeert Uytterhoeven * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONNECT
10541da177e4SLinus Torvalds * : This must not return until all transfers are completed.
10551da177e4SLinus Torvalds */
10561da177e4SLinus Torvalds static
acornscsi_dma_cleanup(AS_Host * host)10571da177e4SLinus Torvalds void acornscsi_dma_cleanup(AS_Host *host)
10581da177e4SLinus Torvalds {
1059ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON);
1060ffd7858dSRussell King dmac_clearintr(host);
10611da177e4SLinus Torvalds
10621da177e4SLinus Torvalds /*
10631da177e4SLinus Torvalds * Check for a pending transfer
10641da177e4SLinus Torvalds */
10651da177e4SLinus Torvalds if (host->dma.xfer_required) {
10661da177e4SLinus Torvalds host->dma.xfer_required = 0;
10671da177e4SLinus Torvalds if (host->dma.direction == DMA_IN)
10681da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr,
10691da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length);
10701da177e4SLinus Torvalds }
10711da177e4SLinus Torvalds
10721da177e4SLinus Torvalds /*
10731da177e4SLinus Torvalds * Has a transfer been setup?
10741da177e4SLinus Torvalds */
10751da177e4SLinus Torvalds if (host->dma.xfer_setup) {
10761da177e4SLinus Torvalds unsigned int transferred;
10771da177e4SLinus Torvalds
10781da177e4SLinus Torvalds host->dma.xfer_setup = 0;
10791da177e4SLinus Torvalds
10801da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
10811da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi"));
10821da177e4SLinus Torvalds #endif
10831da177e4SLinus Torvalds
10841da177e4SLinus Torvalds /*
10851da177e4SLinus Torvalds * Calculate number of bytes transferred from DMA.
10861da177e4SLinus Torvalds */
1087ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr;
10881da177e4SLinus Torvalds host->dma.transferred += transferred;
10891da177e4SLinus Torvalds
10901da177e4SLinus Torvalds if (host->dma.direction == DMA_IN)
10911da177e4SLinus Torvalds acornscsi_data_read(host, host->scsi.SCp.ptr,
10921da177e4SLinus Torvalds host->dma.start_addr, transferred);
10931da177e4SLinus Torvalds
10941da177e4SLinus Torvalds /*
10951da177e4SLinus Torvalds * Update SCSI pointers
10961da177e4SLinus Torvalds */
10971da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
10981da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
10991da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo"));
11001da177e4SLinus Torvalds #endif
11011da177e4SLinus Torvalds }
11021da177e4SLinus Torvalds }
11031da177e4SLinus Torvalds
11041da177e4SLinus Torvalds /*
11051da177e4SLinus Torvalds * Function: void acornscsi_dmacintr(AS_Host *host)
11061da177e4SLinus Torvalds * Purpose : handle interrupts from DMAC device
11071da177e4SLinus Torvalds * Params : host - host to process
11081da177e4SLinus Torvalds * Notes : If reading, we schedule the read to main memory &
11091da177e4SLinus Torvalds * allow the transfer to continue.
11101da177e4SLinus Torvalds * : If writing, we fill the onboard DMA memory from main
11111da177e4SLinus Torvalds * memory.
11121da177e4SLinus Torvalds * : Called whenever DMAC finished it's current transfer.
11131da177e4SLinus Torvalds */
11141da177e4SLinus Torvalds static
acornscsi_dma_intr(AS_Host * host)11151da177e4SLinus Torvalds void acornscsi_dma_intr(AS_Host *host)
11161da177e4SLinus Torvalds {
11171da177e4SLinus Torvalds unsigned int address, length, transferred;
11181da177e4SLinus Torvalds
11191da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
11201da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "inti"));
11211da177e4SLinus Torvalds #endif
11221da177e4SLinus Torvalds
1123ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_ON);
1124ffd7858dSRussell King dmac_clearintr(host);
11251da177e4SLinus Torvalds
11261da177e4SLinus Torvalds /*
11271da177e4SLinus Torvalds * Calculate amount transferred via DMA
11281da177e4SLinus Torvalds */
1129ffd7858dSRussell King transferred = dmac_address(host) - host->dma.start_addr;
11301da177e4SLinus Torvalds host->dma.transferred += transferred;
11311da177e4SLinus Torvalds
11321da177e4SLinus Torvalds /*
11331da177e4SLinus Torvalds * Schedule DMA transfer off board
11341da177e4SLinus Torvalds */
11351da177e4SLinus Torvalds if (host->dma.direction == DMA_IN) {
11361da177e4SLinus Torvalds host->dma.xfer_start = host->dma.start_addr;
11371da177e4SLinus Torvalds host->dma.xfer_length = transferred;
11381da177e4SLinus Torvalds host->dma.xfer_ptr = host->scsi.SCp.ptr;
11391da177e4SLinus Torvalds host->dma.xfer_required = 1;
11401da177e4SLinus Torvalds }
11411da177e4SLinus Torvalds
11421da177e4SLinus Torvalds acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
11431da177e4SLinus Torvalds
11441da177e4SLinus Torvalds /*
11451da177e4SLinus Torvalds * Allocate some buffer space, limited to half the on-board RAM size
11461da177e4SLinus Torvalds */
11471da177e4SLinus Torvalds length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
11481da177e4SLinus Torvalds if (length) {
11491da177e4SLinus Torvalds host->dma.start_addr = address = host->dma.free_addr;
11501da177e4SLinus Torvalds host->dma.free_addr = (host->dma.free_addr + length) &
11511da177e4SLinus Torvalds (DMAC_BUFFER_SIZE - 1);
11521da177e4SLinus Torvalds
11531da177e4SLinus Torvalds /*
11541da177e4SLinus Torvalds * Transfer data to DMA memory
11551da177e4SLinus Torvalds */
11561da177e4SLinus Torvalds if (host->dma.direction == DMA_OUT)
11571da177e4SLinus Torvalds acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
11581da177e4SLinus Torvalds length);
11591da177e4SLinus Torvalds
11601da177e4SLinus Torvalds length -= 1;
1161ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, length);
1162ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, length >> 8);
1163ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, address);
1164ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, address >> 8);
1165ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0);
1166ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF);
11671da177e4SLinus Torvalds
11681da177e4SLinus Torvalds #if (DEBUG & DEBUG_DMA)
11691da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "into"));
11701da177e4SLinus Torvalds #endif
11711da177e4SLinus Torvalds } else {
11721da177e4SLinus Torvalds host->dma.xfer_setup = 0;
11731da177e4SLinus Torvalds #if 0
11741da177e4SLinus Torvalds /*
11751da177e4SLinus Torvalds * If the interface still wants more, then this is an error.
11761da177e4SLinus Torvalds * We give it another byte, but we also attempt to raise an
11771da177e4SLinus Torvalds * attention condition. We continue giving one byte until
11781da177e4SLinus Torvalds * the device recognises the attention.
11791da177e4SLinus Torvalds */
1180ffd7858dSRussell King if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) {
1181756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
11821da177e4SLinus Torvalds
1183ffd7858dSRussell King dmac_write(host, DMAC_TXCNTLO, 0);
1184ffd7858dSRussell King dmac_write(host, DMAC_TXCNTHI, 0);
1185ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, 0);
1186ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, 0);
1187ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, 0);
1188ffd7858dSRussell King dmac_write(host, DMAC_MASKREG, MASK_OFF);
11891da177e4SLinus Torvalds }
11901da177e4SLinus Torvalds #endif
11911da177e4SLinus Torvalds }
11921da177e4SLinus Torvalds }
11931da177e4SLinus Torvalds
11941da177e4SLinus Torvalds /*
11951da177e4SLinus Torvalds * Function: void acornscsi_dma_xfer(AS_Host *host)
11961da177e4SLinus Torvalds * Purpose : transfer data between AcornSCSI and memory
11971da177e4SLinus Torvalds * Params : host - host to process
11981da177e4SLinus Torvalds */
11991da177e4SLinus Torvalds static
acornscsi_dma_xfer(AS_Host * host)12001da177e4SLinus Torvalds void acornscsi_dma_xfer(AS_Host *host)
12011da177e4SLinus Torvalds {
12021da177e4SLinus Torvalds host->dma.xfer_required = 0;
12031da177e4SLinus Torvalds
12041da177e4SLinus Torvalds if (host->dma.direction == DMA_IN)
12051da177e4SLinus Torvalds acornscsi_data_read(host, host->dma.xfer_ptr,
12061da177e4SLinus Torvalds host->dma.xfer_start, host->dma.xfer_length);
12071da177e4SLinus Torvalds }
12081da177e4SLinus Torvalds
12091da177e4SLinus Torvalds /*
12101da177e4SLinus Torvalds * Function: void acornscsi_dma_adjust(AS_Host *host)
12111da177e4SLinus Torvalds * Purpose : adjust DMA pointers & count for bytes transferred to
12121da177e4SLinus Torvalds * SBIC but not SCSI bus.
12131da177e4SLinus Torvalds * Params : host - host to adjust DMA count for
12141da177e4SLinus Torvalds */
12151da177e4SLinus Torvalds static
acornscsi_dma_adjust(AS_Host * host)12161da177e4SLinus Torvalds void acornscsi_dma_adjust(AS_Host *host)
12171da177e4SLinus Torvalds {
12181da177e4SLinus Torvalds if (host->dma.xfer_setup) {
12191da177e4SLinus Torvalds signed long transferred;
12201da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
12211da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adji"));
12221da177e4SLinus Torvalds #endif
12231da177e4SLinus Torvalds /*
12241da177e4SLinus Torvalds * Calculate correct DMA address - DMA is ahead of SCSI bus while
12251da177e4SLinus Torvalds * writing.
12261da177e4SLinus Torvalds * host->scsi.SCp.scsi_xferred is the number of bytes
12271da177e4SLinus Torvalds * actually transferred to/from the SCSI bus.
12281da177e4SLinus Torvalds * host->dma.transferred is the number of bytes transferred
12291da177e4SLinus Torvalds * over DMA since host->dma.start_addr was last set.
12301da177e4SLinus Torvalds *
12311da177e4SLinus Torvalds * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred
12321da177e4SLinus Torvalds * - host->dma.transferred
12331da177e4SLinus Torvalds */
12341da177e4SLinus Torvalds transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred;
12351da177e4SLinus Torvalds if (transferred < 0)
12361da177e4SLinus Torvalds printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n",
12371da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), transferred);
12381da177e4SLinus Torvalds else if (transferred == 0)
12391da177e4SLinus Torvalds host->dma.xfer_setup = 0;
12401da177e4SLinus Torvalds else {
12411da177e4SLinus Torvalds transferred += host->dma.start_addr;
1242ffd7858dSRussell King dmac_write(host, DMAC_TXADRLO, transferred);
1243ffd7858dSRussell King dmac_write(host, DMAC_TXADRMD, transferred >> 8);
1244ffd7858dSRussell King dmac_write(host, DMAC_TXADRHI, transferred >> 16);
12451da177e4SLinus Torvalds #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
12461da177e4SLinus Torvalds DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo"));
12471da177e4SLinus Torvalds #endif
12481da177e4SLinus Torvalds }
12491da177e4SLinus Torvalds }
12501da177e4SLinus Torvalds }
12511da177e4SLinus Torvalds #endif
12521da177e4SLinus Torvalds
12531da177e4SLinus Torvalds /* =========================================================================================
12541da177e4SLinus Torvalds * Data I/O
12551da177e4SLinus Torvalds */
12561da177e4SLinus Torvalds static int
acornscsi_write_pio(AS_Host * host,char * bytes,int * ptr,int len,unsigned int max_timeout)12571da177e4SLinus Torvalds acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout)
12581da177e4SLinus Torvalds {
12591da177e4SLinus Torvalds unsigned int asr, timeout = max_timeout;
12601da177e4SLinus Torvalds int my_ptr = *ptr;
12611da177e4SLinus Torvalds
12621da177e4SLinus Torvalds while (my_ptr < len) {
1263ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
12641da177e4SLinus Torvalds
12651da177e4SLinus Torvalds if (asr & ASR_DBR) {
12661da177e4SLinus Torvalds timeout = max_timeout;
12671da177e4SLinus Torvalds
1268ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]);
12691da177e4SLinus Torvalds } else if (asr & ASR_INT)
12701da177e4SLinus Torvalds break;
12711da177e4SLinus Torvalds else if (--timeout == 0)
12721da177e4SLinus Torvalds break;
12731da177e4SLinus Torvalds udelay(1);
12741da177e4SLinus Torvalds }
12751da177e4SLinus Torvalds
12761da177e4SLinus Torvalds *ptr = my_ptr;
12771da177e4SLinus Torvalds
12781da177e4SLinus Torvalds return (timeout == 0) ? -1 : 0;
12791da177e4SLinus Torvalds }
12801da177e4SLinus Torvalds
12811da177e4SLinus Torvalds /*
12821da177e4SLinus Torvalds * Function: void acornscsi_sendcommand(AS_Host *host)
12831da177e4SLinus Torvalds * Purpose : send a command to a target
12841da177e4SLinus Torvalds * Params : host - host which is connected to target
12851da177e4SLinus Torvalds */
12861da177e4SLinus Torvalds static void
acornscsi_sendcommand(AS_Host * host)12871da177e4SLinus Torvalds acornscsi_sendcommand(AS_Host *host)
12881da177e4SLinus Torvalds {
1289ee0ca6baSHenne struct scsi_cmnd *SCpnt = host->SCpnt;
12901da177e4SLinus Torvalds
1291ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0);
1292ffd7858dSRussell King sbic_arm_writenext(host, 0);
1293ffd7858dSRussell King sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command);
12941da177e4SLinus Torvalds
12951da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
12961da177e4SLinus Torvalds
12971da177e4SLinus Torvalds if (acornscsi_write_pio(host, SCpnt->cmnd,
12981da177e4SLinus Torvalds (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000))
12991da177e4SLinus Torvalds printk("scsi%d: timeout while sending command\n", host->host->host_no);
13001da177e4SLinus Torvalds
13011da177e4SLinus Torvalds host->scsi.phase = PHASE_COMMAND;
13021da177e4SLinus Torvalds }
13031da177e4SLinus Torvalds
13041da177e4SLinus Torvalds static
acornscsi_sendmessage(AS_Host * host)13051da177e4SLinus Torvalds void acornscsi_sendmessage(AS_Host *host)
13061da177e4SLinus Torvalds {
13071da177e4SLinus Torvalds unsigned int message_length = msgqueue_msglength(&host->scsi.msgs);
13081da177e4SLinus Torvalds unsigned int msgnr;
13091da177e4SLinus Torvalds struct message *msg;
13101da177e4SLinus Torvalds
13111da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
13121da177e4SLinus Torvalds printk("scsi%d.%c: sending message ",
13131da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
13141da177e4SLinus Torvalds #endif
13151da177e4SLinus Torvalds
13161da177e4SLinus Torvalds switch (message_length) {
13171da177e4SLinus Torvalds case 0:
13181da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
13191da177e4SLinus Torvalds
13201da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1");
13211da177e4SLinus Torvalds
1322ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, NOP);
13231da177e4SLinus Torvalds
13241da177e4SLinus Torvalds host->scsi.last_message = NOP;
13251da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
13261da177e4SLinus Torvalds printk("NOP");
13271da177e4SLinus Torvalds #endif
13281da177e4SLinus Torvalds break;
13291da177e4SLinus Torvalds
13301da177e4SLinus Torvalds case 1:
13311da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
13321da177e4SLinus Torvalds msg = msgqueue_getmsg(&host->scsi.msgs, 0);
13331da177e4SLinus Torvalds
13341da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2");
13351da177e4SLinus Torvalds
1336ffd7858dSRussell King sbic_arm_write(host, SBIC_DATA, msg->msg[0]);
13371da177e4SLinus Torvalds
13381da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0];
13391da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
13401abfd370SMatthew Wilcox spi_print_msg(msg->msg);
13411da177e4SLinus Torvalds #endif
13421da177e4SLinus Torvalds break;
13431da177e4SLinus Torvalds
13441da177e4SLinus Torvalds default:
13451da177e4SLinus Torvalds /*
13461da177e4SLinus Torvalds * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14)
13471da177e4SLinus Torvalds * 'When a target sends this (MESSAGE_REJECT) message, it
13481da177e4SLinus Torvalds * shall change to MESSAGE IN phase and send this message
13491da177e4SLinus Torvalds * prior to requesting additional message bytes from the
13501da177e4SLinus Torvalds * initiator. This provides an interlock so that the
13511da177e4SLinus Torvalds * initiator can determine which message byte is rejected.
13521da177e4SLinus Torvalds */
1353ffd7858dSRussell King sbic_arm_write(host, SBIC_TRANSCNTH, 0);
1354ffd7858dSRussell King sbic_arm_writenext(host, 0);
1355ffd7858dSRussell King sbic_arm_writenext(host, message_length);
13561da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
13571da177e4SLinus Torvalds
13581da177e4SLinus Torvalds msgnr = 0;
13591da177e4SLinus Torvalds while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) {
13601da177e4SLinus Torvalds unsigned int i;
13611da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
13621abfd370SMatthew Wilcox spi_print_msg(msg);
13631da177e4SLinus Torvalds #endif
13641da177e4SLinus Torvalds i = 0;
13651da177e4SLinus Torvalds if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000))
13661da177e4SLinus Torvalds printk("scsi%d: timeout while sending message\n", host->host->host_no);
13671da177e4SLinus Torvalds
13681da177e4SLinus Torvalds host->scsi.last_message = msg->msg[0];
13691da177e4SLinus Torvalds if (msg->msg[0] == EXTENDED_MESSAGE)
13701da177e4SLinus Torvalds host->scsi.last_message |= msg->msg[2] << 8;
13711da177e4SLinus Torvalds
13721da177e4SLinus Torvalds if (i != msg->length)
13731da177e4SLinus Torvalds break;
13741da177e4SLinus Torvalds }
13751da177e4SLinus Torvalds break;
13761da177e4SLinus Torvalds }
13771da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
13781da177e4SLinus Torvalds printk("\n");
13791da177e4SLinus Torvalds #endif
13801da177e4SLinus Torvalds }
13811da177e4SLinus Torvalds
13821da177e4SLinus Torvalds /*
13831da177e4SLinus Torvalds * Function: void acornscsi_readstatusbyte(AS_Host *host)
13841da177e4SLinus Torvalds * Purpose : Read status byte from connected target
13851da177e4SLinus Torvalds * Params : host - host connected to target
13861da177e4SLinus Torvalds */
13871da177e4SLinus Torvalds static
acornscsi_readstatusbyte(AS_Host * host)13881da177e4SLinus Torvalds void acornscsi_readstatusbyte(AS_Host *host)
13891da177e4SLinus Torvalds {
13901da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT);
13911da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte");
1392ffd7858dSRussell King host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA);
13931da177e4SLinus Torvalds }
13941da177e4SLinus Torvalds
13951da177e4SLinus Torvalds /*
13961da177e4SLinus Torvalds * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host)
13971da177e4SLinus Torvalds * Purpose : Read one message byte from connected target
13981da177e4SLinus Torvalds * Params : host - host connected to target
13991da177e4SLinus Torvalds */
14001da177e4SLinus Torvalds static
acornscsi_readmessagebyte(AS_Host * host)14011da177e4SLinus Torvalds unsigned char acornscsi_readmessagebyte(AS_Host *host)
14021da177e4SLinus Torvalds {
14031da177e4SLinus Torvalds unsigned char message;
14041da177e4SLinus Torvalds
14051da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
14061da177e4SLinus Torvalds
14071da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte");
14081da177e4SLinus Torvalds
1409ffd7858dSRussell King message = sbic_arm_read(host, SBIC_DATA);
14101da177e4SLinus Torvalds
14111da177e4SLinus Torvalds /* wait for MSGIN-XFER-PAUSED */
14121da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte");
14131da177e4SLinus Torvalds
1414ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR);
14151da177e4SLinus Torvalds
14161da177e4SLinus Torvalds return message;
14171da177e4SLinus Torvalds }
14181da177e4SLinus Torvalds
14191da177e4SLinus Torvalds /*
14201da177e4SLinus Torvalds * Function: void acornscsi_message(AS_Host *host)
14211da177e4SLinus Torvalds * Purpose : Read complete message from connected target & action message
14221da177e4SLinus Torvalds * Params : host - host connected to target
14231da177e4SLinus Torvalds */
14241da177e4SLinus Torvalds static
acornscsi_message(AS_Host * host)14251da177e4SLinus Torvalds void acornscsi_message(AS_Host *host)
14261da177e4SLinus Torvalds {
1427dc417545SBart Van Assche struct scsi_pointer *scsi_pointer;
14281da177e4SLinus Torvalds unsigned char message[16];
14291da177e4SLinus Torvalds unsigned int msgidx = 0, msglen = 1;
14301da177e4SLinus Torvalds
14311da177e4SLinus Torvalds do {
14321da177e4SLinus Torvalds message[msgidx] = acornscsi_readmessagebyte(host);
14331da177e4SLinus Torvalds
14341da177e4SLinus Torvalds switch (msgidx) {
14351da177e4SLinus Torvalds case 0:
14361da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE ||
14371da177e4SLinus Torvalds (message[0] >= 0x20 && message[0] <= 0x2f))
14381da177e4SLinus Torvalds msglen = 2;
14391da177e4SLinus Torvalds break;
14401da177e4SLinus Torvalds
14411da177e4SLinus Torvalds case 1:
14421da177e4SLinus Torvalds if (message[0] == EXTENDED_MESSAGE)
14431da177e4SLinus Torvalds msglen += message[msgidx];
14441da177e4SLinus Torvalds break;
14451da177e4SLinus Torvalds }
14461da177e4SLinus Torvalds msgidx += 1;
14471da177e4SLinus Torvalds if (msgidx < msglen) {
14481da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
14491da177e4SLinus Torvalds
14501da177e4SLinus Torvalds /* wait for next msg-in */
14511da177e4SLinus Torvalds acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack");
1452ffd7858dSRussell King sbic_arm_read(host, SBIC_SSR);
14531da177e4SLinus Torvalds }
14541da177e4SLinus Torvalds } while (msgidx < msglen);
14551da177e4SLinus Torvalds
14561da177e4SLinus Torvalds #if (DEBUG & DEBUG_MESSAGES)
14571da177e4SLinus Torvalds printk("scsi%d.%c: message in: ",
14581da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
14591abfd370SMatthew Wilcox spi_print_msg(message);
14601da177e4SLinus Torvalds printk("\n");
14611da177e4SLinus Torvalds #endif
14621da177e4SLinus Torvalds
14631da177e4SLinus Torvalds if (host->scsi.phase == PHASE_RECONNECTED) {
14641da177e4SLinus Torvalds /*
14651da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17)
14661da177e4SLinus Torvalds * 'Whenever a target reconnects to an initiator to continue
14671da177e4SLinus Torvalds * a tagged I/O process, the SIMPLE QUEUE TAG message shall
14681da177e4SLinus Torvalds * be sent immediately following the IDENTIFY message...'
14691da177e4SLinus Torvalds */
14701da177e4SLinus Torvalds if (message[0] == SIMPLE_QUEUE_TAG)
14711da177e4SLinus Torvalds host->scsi.reconnected.tag = message[1];
14721da177e4SLinus Torvalds if (acornscsi_reconnect_finish(host))
14731da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN;
14741da177e4SLinus Torvalds }
14751da177e4SLinus Torvalds
14761da177e4SLinus Torvalds switch (message[0]) {
14770eb198d2SHannes Reinecke case ABORT_TASK_SET:
14780eb198d2SHannes Reinecke case ABORT_TASK:
14791da177e4SLinus Torvalds case COMMAND_COMPLETE:
14801da177e4SLinus Torvalds if (host->scsi.phase != PHASE_STATUSIN) {
14811da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n",
14821da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
14831da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt->device->id);
14841da177e4SLinus Torvalds }
14851da177e4SLinus Torvalds host->scsi.phase = PHASE_DONE;
14861da177e4SLinus Torvalds host->scsi.SCp.Message = message[0];
14871da177e4SLinus Torvalds break;
14881da177e4SLinus Torvalds
14891da177e4SLinus Torvalds case SAVE_POINTERS:
14901da177e4SLinus Torvalds /*
14911da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20)
14921da177e4SLinus Torvalds * 'The SAVE DATA POINTER message is sent from a target to
14931da177e4SLinus Torvalds * direct the initiator to copy the active data pointer to
14941da177e4SLinus Torvalds * the saved data pointer for the current I/O process.
14951da177e4SLinus Torvalds */
14961da177e4SLinus Torvalds acornscsi_dma_cleanup(host);
1497dc417545SBart Van Assche scsi_pointer = arm_scsi_pointer(host->SCpnt);
1498dc417545SBart Van Assche *scsi_pointer = host->scsi.SCp;
1499dc417545SBart Van Assche scsi_pointer->sent_command = 0;
15001da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN;
15011da177e4SLinus Torvalds break;
15021da177e4SLinus Torvalds
15031da177e4SLinus Torvalds case RESTORE_POINTERS:
15041da177e4SLinus Torvalds /*
15051da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19)
15061da177e4SLinus Torvalds * 'The RESTORE POINTERS message is sent from a target to
15071da177e4SLinus Torvalds * direct the initiator to copy the most recently saved
15081da177e4SLinus Torvalds * command, data, and status pointers for the I/O process
15091da177e4SLinus Torvalds * to the corresponding active pointers. The command and
15101da177e4SLinus Torvalds * status pointers shall be restored to the beginning of
15111da177e4SLinus Torvalds * the present command and status areas.'
15121da177e4SLinus Torvalds */
15131da177e4SLinus Torvalds acornscsi_dma_cleanup(host);
1514dc417545SBart Van Assche host->scsi.SCp = *arm_scsi_pointer(host->SCpnt);
15151da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN;
15161da177e4SLinus Torvalds break;
15171da177e4SLinus Torvalds
15181da177e4SLinus Torvalds case DISCONNECT:
15191da177e4SLinus Torvalds /*
15201da177e4SLinus Torvalds * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2)
15211da177e4SLinus Torvalds * 'On those occasions when an error or exception condition occurs
15221da177e4SLinus Torvalds * and the target elects to repeat the information transfer, the
15231da177e4SLinus Torvalds * target may repeat the transfer either issuing a RESTORE POINTERS
15241da177e4SLinus Torvalds * message or by disconnecting without issuing a SAVE POINTERS
15251da177e4SLinus Torvalds * message. When reconnection is completed, the most recent
15261da177e4SLinus Torvalds * saved pointer values are restored.'
15271da177e4SLinus Torvalds */
15281da177e4SLinus Torvalds acornscsi_dma_cleanup(host);
15291da177e4SLinus Torvalds host->scsi.phase = PHASE_DISCONNECT;
15301da177e4SLinus Torvalds break;
15311da177e4SLinus Torvalds
15321da177e4SLinus Torvalds case MESSAGE_REJECT:
15331da177e4SLinus Torvalds #if 0 /* this isn't needed any more */
15341da177e4SLinus Torvalds /*
15351da177e4SLinus Torvalds * If we were negociating sync transfer, we don't yet know if
15361da177e4SLinus Torvalds * this REJECT is for the sync transfer or for the tagged queue/wide
153725985edcSLucas De Marchi * transfer. Re-initiate sync transfer negotiation now, and if
15381da177e4SLinus Torvalds * we got a REJECT in response to SDTR, then it'll be set to DONE.
15391da177e4SLinus Torvalds */
15401da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST)
15411da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE;
15421da177e4SLinus Torvalds #endif
15431da177e4SLinus Torvalds
15441da177e4SLinus Torvalds /*
15451da177e4SLinus Torvalds * If we have any messages waiting to go out, then assert ATN now
15461da177e4SLinus Torvalds */
15471da177e4SLinus Torvalds if (msgqueue_msglength(&host->scsi.msgs))
15481da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
15491da177e4SLinus Torvalds
15501da177e4SLinus Torvalds switch (host->scsi.last_message) {
15511da177e4SLinus Torvalds case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8):
15521da177e4SLinus Torvalds /*
15531da177e4SLinus Torvalds * Target can't handle synchronous transfers
15541da177e4SLinus Torvalds */
15551da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n",
15561da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
15571da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA;
15581da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS;
1559ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
15601da177e4SLinus Torvalds break;
15611da177e4SLinus Torvalds
15621da177e4SLinus Torvalds default:
15631da177e4SLinus Torvalds break;
15641da177e4SLinus Torvalds }
15651da177e4SLinus Torvalds break;
15661da177e4SLinus Torvalds
15671da177e4SLinus Torvalds case SIMPLE_QUEUE_TAG:
15681da177e4SLinus Torvalds /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */
15691da177e4SLinus Torvalds printk("scsi%d.%c: reconnect queue tag %02X\n",
15701da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host),
15711da177e4SLinus Torvalds message[1]);
15721da177e4SLinus Torvalds break;
15731da177e4SLinus Torvalds
15741da177e4SLinus Torvalds case EXTENDED_MESSAGE:
15751da177e4SLinus Torvalds switch (message[2]) {
15761da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC
15771da177e4SLinus Torvalds case EXTENDED_SDTR:
15781da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) {
15791da177e4SLinus Torvalds /*
15801da177e4SLinus Torvalds * We requested synchronous transfers. This isn't quite right...
15811da177e4SLinus Torvalds * We can only say if this succeeded if we proceed on to execute the
15821da177e4SLinus Torvalds * command from this message. If we get a MESSAGE PARITY ERROR,
15831da177e4SLinus Torvalds * and the target retries fail, then we fallback to asynchronous mode
15841da177e4SLinus Torvalds */
15851da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED;
15861da177e4SLinus Torvalds printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n",
15871da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host),
15881da177e4SLinus Torvalds message[4], message[3] * 4);
15891da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer =
15901da177e4SLinus Torvalds calc_sync_xfer(message[3] * 4, message[4]);
15911da177e4SLinus Torvalds } else {
15921da177e4SLinus Torvalds unsigned char period, length;
15931da177e4SLinus Torvalds /*
15941da177e4SLinus Torvalds * Target requested synchronous transfers. The agreement is only
15951da177e4SLinus Torvalds * to be in operation AFTER the target leaves message out phase.
15961da177e4SLinus Torvalds */
15971da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
15981da177e4SLinus Torvalds period = max_t(unsigned int, message[3], sdtr_period / 4);
15991da177e4SLinus Torvalds length = min_t(unsigned int, message[4], sdtr_size);
16001da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3,
16011da177e4SLinus Torvalds EXTENDED_SDTR, period, length);
16021da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_xfer =
16031da177e4SLinus Torvalds calc_sync_xfer(period * 4, length);
16041da177e4SLinus Torvalds }
1605ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
16061da177e4SLinus Torvalds break;
16071da177e4SLinus Torvalds #else
16081da177e4SLinus Torvalds /* We do not accept synchronous transfers. Respond with a
16091da177e4SLinus Torvalds * MESSAGE_REJECT.
16101da177e4SLinus Torvalds */
16111da177e4SLinus Torvalds #endif
16121da177e4SLinus Torvalds
16131da177e4SLinus Torvalds case EXTENDED_WDTR:
16141da177e4SLinus Torvalds /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT
16151da177e4SLinus Torvalds * to a wide data transfer request.
16161da177e4SLinus Torvalds */
16171da177e4SLinus Torvalds default:
16181da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
16191da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
16201da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
16211da177e4SLinus Torvalds break;
16221da177e4SLinus Torvalds }
16231da177e4SLinus Torvalds break;
16241da177e4SLinus Torvalds
16251da177e4SLinus Torvalds default: /* reject message */
16261da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n",
16271da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host),
16281da177e4SLinus Torvalds message[0]);
16291da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
16301da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
16311da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
16321da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGIN;
16331da177e4SLinus Torvalds break;
16341da177e4SLinus Torvalds }
16351da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
16361da177e4SLinus Torvalds }
16371da177e4SLinus Torvalds
16381da177e4SLinus Torvalds /*
16391da177e4SLinus Torvalds * Function: int acornscsi_buildmessages(AS_Host *host)
16401da177e4SLinus Torvalds * Purpose : build the connection messages for a host
16411da177e4SLinus Torvalds * Params : host - host to add messages to
16421da177e4SLinus Torvalds */
16431da177e4SLinus Torvalds static
acornscsi_buildmessages(AS_Host * host)16441da177e4SLinus Torvalds void acornscsi_buildmessages(AS_Host *host)
16451da177e4SLinus Torvalds {
16461da177e4SLinus Torvalds #if 0
16471da177e4SLinus Torvalds /* does the device need resetting? */
16481da177e4SLinus Torvalds if (cmd_reset) {
16491da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET);
16501da177e4SLinus Torvalds return;
16511da177e4SLinus Torvalds }
16521da177e4SLinus Torvalds #endif
16531da177e4SLinus Torvalds
16541da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1,
16551da177e4SLinus Torvalds IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok,
16561da177e4SLinus Torvalds host->SCpnt->device->lun));
16571da177e4SLinus Torvalds
16581da177e4SLinus Torvalds #if 0
16591da177e4SLinus Torvalds /* does the device need the current command aborted */
16601da177e4SLinus Torvalds if (cmd_aborted) {
1661756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
16621da177e4SLinus Torvalds return;
16631da177e4SLinus Torvalds }
16641da177e4SLinus Torvalds #endif
16651da177e4SLinus Torvalds
16661da177e4SLinus Torvalds
16671da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC
16681da177e4SLinus Torvalds if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) {
16691da177e4SLinus Torvalds host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST;
16701da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 5,
16711da177e4SLinus Torvalds EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
16721da177e4SLinus Torvalds sdtr_period / 4, sdtr_size);
16731da177e4SLinus Torvalds }
16741da177e4SLinus Torvalds #endif
16751da177e4SLinus Torvalds }
16761da177e4SLinus Torvalds
16771da177e4SLinus Torvalds /*
16781da177e4SLinus Torvalds * Function: int acornscsi_starttransfer(AS_Host *host)
16791da177e4SLinus Torvalds * Purpose : transfer data to/from connected target
16801da177e4SLinus Torvalds * Params : host - host to which target is connected
16811da177e4SLinus Torvalds * Returns : 0 if failure
16821da177e4SLinus Torvalds */
16831da177e4SLinus Torvalds static
acornscsi_starttransfer(AS_Host * host)16841da177e4SLinus Torvalds int acornscsi_starttransfer(AS_Host *host)
16851da177e4SLinus Torvalds {
16861da177e4SLinus Torvalds int residual;
16871da177e4SLinus Torvalds
16881da177e4SLinus Torvalds if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) {
16891da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n",
16901da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
16911da177e4SLinus Torvalds return 0;
16921da177e4SLinus Torvalds }
16931da177e4SLinus Torvalds
169484ac86caSBoaz Harrosh residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred;
16951da177e4SLinus Torvalds
1696ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
1697ffd7858dSRussell King sbic_arm_writenext(host, residual >> 16);
1698ffd7858dSRussell King sbic_arm_writenext(host, residual >> 8);
1699ffd7858dSRussell King sbic_arm_writenext(host, residual);
17001da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
17011da177e4SLinus Torvalds return 1;
17021da177e4SLinus Torvalds }
17031da177e4SLinus Torvalds
17041da177e4SLinus Torvalds /* =========================================================================================
17051da177e4SLinus Torvalds * Connection & Disconnection
17061da177e4SLinus Torvalds */
17071da177e4SLinus Torvalds /*
17081da177e4SLinus Torvalds * Function : acornscsi_reconnect(AS_Host *host)
17091da177e4SLinus Torvalds * Purpose : reconnect a previously disconnected command
17101da177e4SLinus Torvalds * Params : host - host specific data
17111da177e4SLinus Torvalds * Remarks : SCSI spec says:
17121da177e4SLinus Torvalds * 'The set of active pointers is restored from the set
17131da177e4SLinus Torvalds * of saved pointers upon reconnection of the I/O process'
17141da177e4SLinus Torvalds */
17151da177e4SLinus Torvalds static
acornscsi_reconnect(AS_Host * host)17161da177e4SLinus Torvalds int acornscsi_reconnect(AS_Host *host)
17171da177e4SLinus Torvalds {
17181da177e4SLinus Torvalds unsigned int target, lun, ok = 0;
17191da177e4SLinus Torvalds
1720ffd7858dSRussell King target = sbic_arm_read(host, SBIC_SOURCEID);
17211da177e4SLinus Torvalds
17221da177e4SLinus Torvalds if (!(target & 8))
17231da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: invalid source id after reselection "
17241da177e4SLinus Torvalds "- device fault?\n",
17251da177e4SLinus Torvalds host->host->host_no);
17261da177e4SLinus Torvalds
17271da177e4SLinus Torvalds target &= 7;
17281da177e4SLinus Torvalds
17291da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable) {
17301da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%d: reconnected while command in "
17311da177e4SLinus Torvalds "progress to target %d?\n",
17321da177e4SLinus Torvalds host->host->host_no, target, host->SCpnt->device->id);
17331da177e4SLinus Torvalds host->SCpnt = NULL;
17341da177e4SLinus Torvalds }
17351da177e4SLinus Torvalds
1736ffd7858dSRussell King lun = sbic_arm_read(host, SBIC_DATA) & 7;
17371da177e4SLinus Torvalds
17381da177e4SLinus Torvalds host->scsi.reconnected.target = target;
17391da177e4SLinus Torvalds host->scsi.reconnected.lun = lun;
17401da177e4SLinus Torvalds host->scsi.reconnected.tag = 0;
17411da177e4SLinus Torvalds
17421da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt &&
17431da177e4SLinus Torvalds host->SCpnt->device->id == target && host->SCpnt->device->lun == lun)
17441da177e4SLinus Torvalds ok = 1;
17451da177e4SLinus Torvalds
17461da177e4SLinus Torvalds if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun))
17471da177e4SLinus Torvalds ok = 1;
17481da177e4SLinus Torvalds
17491da177e4SLinus Torvalds ADD_STATUS(target, 0x81, host->scsi.phase, 0);
17501da177e4SLinus Torvalds
17511da177e4SLinus Torvalds if (ok) {
17521da177e4SLinus Torvalds host->scsi.phase = PHASE_RECONNECTED;
17531da177e4SLinus Torvalds } else {
17541da177e4SLinus Torvalds /* this doesn't seem to work */
17551da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: reselected with no command "
17561da177e4SLinus Torvalds "to reconnect with\n",
17571da177e4SLinus Torvalds host->host->host_no, '0' + target);
17581da177e4SLinus Torvalds acornscsi_dumplog(host, target);
1759756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
17601da177e4SLinus Torvalds if (host->SCpnt) {
17611da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
17621da177e4SLinus Torvalds host->SCpnt = NULL;
17631da177e4SLinus Torvalds }
17641da177e4SLinus Torvalds }
17651da177e4SLinus Torvalds acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
17661da177e4SLinus Torvalds return !ok;
17671da177e4SLinus Torvalds }
17681da177e4SLinus Torvalds
17691da177e4SLinus Torvalds /*
17701125c70aSGeert Uytterhoeven * Function: int acornscsi_reconnect_finish(AS_Host *host)
17711da177e4SLinus Torvalds * Purpose : finish reconnecting a command
17721da177e4SLinus Torvalds * Params : host - host to complete
17731da177e4SLinus Torvalds * Returns : 0 if failed
17741da177e4SLinus Torvalds */
17751da177e4SLinus Torvalds static
acornscsi_reconnect_finish(AS_Host * host)17761da177e4SLinus Torvalds int acornscsi_reconnect_finish(AS_Host *host)
17771da177e4SLinus Torvalds {
17781da177e4SLinus Torvalds if (host->scsi.disconnectable && host->SCpnt) {
17791da177e4SLinus Torvalds host->scsi.disconnectable = 0;
17801da177e4SLinus Torvalds if (host->SCpnt->device->id == host->scsi.reconnected.target &&
17811da177e4SLinus Torvalds host->SCpnt->device->lun == host->scsi.reconnected.lun &&
1782c5336400SJohn Garry scsi_cmd_to_rq(host->SCpnt)->tag == host->scsi.reconnected.tag) {
17831da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
17841da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: reconnected",
17851da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)));
17861da177e4SLinus Torvalds #endif
17871da177e4SLinus Torvalds } else {
17881da177e4SLinus Torvalds queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
17891da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
17901da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to move command "
17911da177e4SLinus Torvalds "to disconnected queue\n",
17921da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)));
17931da177e4SLinus Torvalds #endif
17941da177e4SLinus Torvalds host->SCpnt = NULL;
17951da177e4SLinus Torvalds }
17961da177e4SLinus Torvalds }
17971da177e4SLinus Torvalds if (!host->SCpnt) {
17981da177e4SLinus Torvalds host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected,
17991da177e4SLinus Torvalds host->scsi.reconnected.target,
18001da177e4SLinus Torvalds host->scsi.reconnected.lun,
18011da177e4SLinus Torvalds host->scsi.reconnected.tag);
18021da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
18031da177e4SLinus Torvalds DBG(host->SCpnt, printk("scsi%d.%c: had to get command",
18041da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host)));
18051da177e4SLinus Torvalds #endif
18061da177e4SLinus Torvalds }
18071da177e4SLinus Torvalds
18081da177e4SLinus Torvalds if (!host->SCpnt)
1809756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
18101da177e4SLinus Torvalds else {
18111da177e4SLinus Torvalds /*
18121da177e4SLinus Torvalds * Restore data pointer from SAVED pointers.
18131da177e4SLinus Torvalds */
1814dc417545SBart Van Assche host->scsi.SCp = *arm_scsi_pointer(host->SCpnt);
18151da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
18161da177e4SLinus Torvalds printk(", data pointers: [%p, %X]",
18171da177e4SLinus Torvalds host->scsi.SCp.ptr, host->scsi.SCp.this_residual);
18181da177e4SLinus Torvalds #endif
18191da177e4SLinus Torvalds }
18201da177e4SLinus Torvalds #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
18211da177e4SLinus Torvalds printk("\n");
18221da177e4SLinus Torvalds #endif
18231da177e4SLinus Torvalds
18241da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred;
18251da177e4SLinus Torvalds
18261da177e4SLinus Torvalds return host->SCpnt != NULL;
18271da177e4SLinus Torvalds }
18281da177e4SLinus Torvalds
18291da177e4SLinus Torvalds /*
18301da177e4SLinus Torvalds * Function: void acornscsi_disconnect_unexpected(AS_Host *host)
18311da177e4SLinus Torvalds * Purpose : handle an unexpected disconnect
18321da177e4SLinus Torvalds * Params : host - host on which disconnect occurred
18331da177e4SLinus Torvalds */
18341da177e4SLinus Torvalds static
acornscsi_disconnect_unexpected(AS_Host * host)18351da177e4SLinus Torvalds void acornscsi_disconnect_unexpected(AS_Host *host)
18361da177e4SLinus Torvalds {
18371da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n",
18381da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
18391da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT)
18401da177e4SLinus Torvalds acornscsi_dumplog(host, 8);
18411da177e4SLinus Torvalds #endif
18421da177e4SLinus Torvalds
18431da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR);
18441da177e4SLinus Torvalds }
18451da177e4SLinus Torvalds
18461da177e4SLinus Torvalds /*
18471da177e4SLinus Torvalds * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag)
18481da177e4SLinus Torvalds * Purpose : abort a currently executing command
18491da177e4SLinus Torvalds * Params : host - host with connected command to abort
18501da177e4SLinus Torvalds */
18511da177e4SLinus Torvalds static
acornscsi_abortcmd(AS_Host * host)1852756fb6a8SHannes Reinecke void acornscsi_abortcmd(AS_Host *host)
18531da177e4SLinus Torvalds {
18541da177e4SLinus Torvalds host->scsi.phase = PHASE_ABORTED;
1855ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN);
18561da177e4SLinus Torvalds
18571da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
18581da177e4SLinus Torvalds msgqueue_addmsg(&host->scsi.msgs, 1, ABORT);
18591da177e4SLinus Torvalds }
18601da177e4SLinus Torvalds
18611da177e4SLinus Torvalds /* ==========================================================================================
18621da177e4SLinus Torvalds * Interrupt routines.
18631da177e4SLinus Torvalds */
18641da177e4SLinus Torvalds /*
18651da177e4SLinus Torvalds * Function: int acornscsi_sbicintr(AS_Host *host)
18661da177e4SLinus Torvalds * Purpose : handle interrupts from SCSI device
18671da177e4SLinus Torvalds * Params : host - host to process
18681da177e4SLinus Torvalds * Returns : INTR_PROCESS if expecting another SBIC interrupt
18691da177e4SLinus Torvalds * INTR_IDLE if no interrupt
18701da177e4SLinus Torvalds * INTR_NEXT_COMMAND if we have finished processing the command
18711da177e4SLinus Torvalds */
18721da177e4SLinus Torvalds static
acornscsi_sbicintr(AS_Host * host,int in_irq)18731da177e4SLinus Torvalds intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
18741da177e4SLinus Torvalds {
18751da177e4SLinus Torvalds unsigned int asr, ssr;
18761da177e4SLinus Torvalds
1877ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
18781da177e4SLinus Torvalds if (!(asr & ASR_INT))
18791da177e4SLinus Torvalds return INTR_IDLE;
18801da177e4SLinus Torvalds
1881ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR);
18821da177e4SLinus Torvalds
18831da177e4SLinus Torvalds #if (DEBUG & DEBUG_PHASES)
18841da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase);
18851da177e4SLinus Torvalds #endif
18861da177e4SLinus Torvalds
18871da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, in_irq);
18881da177e4SLinus Torvalds
18891da177e4SLinus Torvalds if (host->SCpnt && !host->scsi.disconnectable)
18901da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
18911da177e4SLinus Torvalds
18921da177e4SLinus Torvalds switch (ssr) {
18931da177e4SLinus Torvalds case 0x00: /* reset state - not advanced */
18941da177e4SLinus Torvalds printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n",
18951da177e4SLinus Torvalds host->host->host_no);
18961da177e4SLinus Torvalds /* setup sbic - WD33C93A */
1897ffd7858dSRussell King sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id);
1898ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_RESET);
18991da177e4SLinus Torvalds return INTR_IDLE;
19001da177e4SLinus Torvalds
19011da177e4SLinus Torvalds case 0x01: /* reset state - advanced */
1902ffd7858dSRussell King sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
1903ffd7858dSRussell King sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
1904ffd7858dSRussell King sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
1905ffd7858dSRussell King sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
19061da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
19071da177e4SLinus Torvalds return INTR_IDLE;
19081da177e4SLinus Torvalds
19091da177e4SLinus Torvalds case 0x41: /* unexpected disconnect aborted command */
19101da177e4SLinus Torvalds acornscsi_disconnect_unexpected(host);
19111da177e4SLinus Torvalds return INTR_NEXT_COMMAND;
19121da177e4SLinus Torvalds }
19131da177e4SLinus Torvalds
19141da177e4SLinus Torvalds switch (host->scsi.phase) {
19151da177e4SLinus Torvalds case PHASE_CONNECTING: /* STATE: command removed from issue queue */
19161da177e4SLinus Torvalds switch (ssr) {
19171da177e4SLinus Torvalds case 0x11: /* -> PHASE_CONNECTED */
19181da177e4SLinus Torvalds /* BUS FREE -> SELECTION */
19191da177e4SLinus Torvalds host->scsi.phase = PHASE_CONNECTED;
19201da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
19211da177e4SLinus Torvalds host->dma.transferred = host->scsi.SCp.scsi_xferred;
19221da177e4SLinus Torvalds /* 33C93 gives next interrupt indicating bus phase */
1923ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
19241da177e4SLinus Torvalds if (!(asr & ASR_INT))
19251da177e4SLinus Torvalds break;
1926ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR);
19271da177e4SLinus Torvalds ADD_STATUS(8, ssr, host->scsi.phase, 1);
19281da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1);
19291da177e4SLinus Torvalds goto connected;
19301da177e4SLinus Torvalds
19311da177e4SLinus Torvalds case 0x42: /* select timed out */
19321da177e4SLinus Torvalds /* -> PHASE_IDLE */
19331da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT);
19341da177e4SLinus Torvalds return INTR_NEXT_COMMAND;
19351da177e4SLinus Torvalds
19361da177e4SLinus Torvalds case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */
19371da177e4SLinus Torvalds /* BUS FREE -> RESELECTION */
19381da177e4SLinus Torvalds host->origSCpnt = host->SCpnt;
19391da177e4SLinus Torvalds host->SCpnt = NULL;
19401da177e4SLinus Torvalds msgqueue_flush(&host->scsi.msgs);
19411da177e4SLinus Torvalds acornscsi_reconnect(host);
19421da177e4SLinus Torvalds break;
19431da177e4SLinus Torvalds
19441da177e4SLinus Torvalds default:
19451da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n",
19461da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
19471da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
1948756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
19491da177e4SLinus Torvalds }
19501da177e4SLinus Torvalds return INTR_PROCESSING;
19511da177e4SLinus Torvalds
19521da177e4SLinus Torvalds connected:
19531da177e4SLinus Torvalds case PHASE_CONNECTED: /* STATE: device selected ok */
19541da177e4SLinus Torvalds switch (ssr) {
19551da177e4SLinus Torvalds #ifdef NONSTANDARD
19561da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
19571da177e4SLinus Torvalds /* SELECTION -> COMMAND */
19581da177e4SLinus Torvalds acornscsi_sendcommand(host);
19591da177e4SLinus Torvalds break;
19601da177e4SLinus Torvalds
19611da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */
19621da177e4SLinus Torvalds /* SELECTION -> STATUS */
19631da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
19641da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
19651da177e4SLinus Torvalds break;
19661da177e4SLinus Torvalds #endif
19671da177e4SLinus Torvalds
19681da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
19691da177e4SLinus Torvalds /* SELECTION ->MESSAGE OUT */
19701da177e4SLinus Torvalds host->scsi.phase = PHASE_MSGOUT;
19711da177e4SLinus Torvalds acornscsi_buildmessages(host);
19721da177e4SLinus Torvalds acornscsi_sendmessage(host);
19731da177e4SLinus Torvalds break;
19741da177e4SLinus Torvalds
19751da177e4SLinus Torvalds /* these should not happen */
19761da177e4SLinus Torvalds case 0x85: /* target disconnected */
19771da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR);
19781da177e4SLinus Torvalds break;
19791da177e4SLinus Torvalds
19801da177e4SLinus Torvalds default:
19811da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n",
19821da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
19831da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
1984756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
19851da177e4SLinus Torvalds }
19861da177e4SLinus Torvalds return INTR_PROCESSING;
19871da177e4SLinus Torvalds
19881da177e4SLinus Torvalds case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */
19891da177e4SLinus Torvalds /*
19901da177e4SLinus Torvalds * SCSI standard says that MESSAGE OUT phases can be followed by a
19911da177e4SLinus Torvalds * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase
19921da177e4SLinus Torvalds */
19931da177e4SLinus Torvalds switch (ssr) {
19941da177e4SLinus Torvalds case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
19951da177e4SLinus Torvalds case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
19961da177e4SLinus Torvalds /* MESSAGE OUT -> COMMAND */
19971da177e4SLinus Torvalds acornscsi_sendcommand(host);
19981da177e4SLinus Torvalds break;
19991da177e4SLinus Torvalds
20001da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUS */
20011da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */
20021da177e4SLinus Torvalds /* MESSAGE OUT -> STATUS */
20031da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
20041da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
20051da177e4SLinus Torvalds break;
20061da177e4SLinus Torvalds
20071da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
20081da177e4SLinus Torvalds /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */
20091da177e4SLinus Torvalds acornscsi_sendmessage(host);
20101da177e4SLinus Torvalds break;
20111da177e4SLinus Torvalds
20121da177e4SLinus Torvalds case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
20131da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
20141da177e4SLinus Torvalds /* MESSAGE OUT -> MESSAGE IN */
20151da177e4SLinus Torvalds acornscsi_message(host);
20161da177e4SLinus Torvalds break;
20171da177e4SLinus Torvalds
20181da177e4SLinus Torvalds default:
20191da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n",
20201da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
20211da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
20221da177e4SLinus Torvalds }
20231da177e4SLinus Torvalds return INTR_PROCESSING;
20241da177e4SLinus Torvalds
20251da177e4SLinus Torvalds case PHASE_COMMAND: /* STATE: connected & command sent */
20261da177e4SLinus Torvalds switch (ssr) {
20271da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */
20281da177e4SLinus Torvalds /* COMMAND -> DATA OUT */
20291da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
2030756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
20311da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT);
20321da177e4SLinus Torvalds if (!acornscsi_starttransfer(host))
2033756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
20341da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT;
20351da177e4SLinus Torvalds return INTR_IDLE;
20361da177e4SLinus Torvalds
20371da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */
20381da177e4SLinus Torvalds /* COMMAND -> DATA IN */
20391da177e4SLinus Torvalds if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
2040756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
20411da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN);
20421da177e4SLinus Torvalds if (!acornscsi_starttransfer(host))
2043756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
20441da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN;
20451da177e4SLinus Torvalds return INTR_IDLE;
20461da177e4SLinus Torvalds
20471da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUS */
20481da177e4SLinus Torvalds /* COMMAND -> STATUS */
20491da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
20501da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
20511da177e4SLinus Torvalds break;
20521da177e4SLinus Torvalds
20531da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */
20541da177e4SLinus Torvalds /* COMMAND -> MESSAGE OUT */
20551da177e4SLinus Torvalds acornscsi_sendmessage(host);
20561da177e4SLinus Torvalds break;
20571da177e4SLinus Torvalds
20581da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
20591da177e4SLinus Torvalds /* COMMAND -> MESSAGE IN */
20601da177e4SLinus Torvalds acornscsi_message(host);
20611da177e4SLinus Torvalds break;
20621da177e4SLinus Torvalds
20631da177e4SLinus Torvalds default:
20641da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n",
20651da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
20661da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
20671da177e4SLinus Torvalds }
20681da177e4SLinus Torvalds return INTR_PROCESSING;
20691da177e4SLinus Torvalds
20701da177e4SLinus Torvalds case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */
20711da177e4SLinus Torvalds if (ssr == 0x85) { /* -> PHASE_IDLE */
20721da177e4SLinus Torvalds host->scsi.disconnectable = 1;
20731da177e4SLinus Torvalds host->scsi.reconnected.tag = 0;
20741da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE;
20751da177e4SLinus Torvalds host->stats.disconnects += 1;
20761da177e4SLinus Torvalds } else {
20771da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n",
20781da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
20791da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
20801da177e4SLinus Torvalds }
20811da177e4SLinus Torvalds return INTR_NEXT_COMMAND;
20821da177e4SLinus Torvalds
20831da177e4SLinus Torvalds case PHASE_IDLE: /* STATE: disconnected */
20841da177e4SLinus Torvalds if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */
20851da177e4SLinus Torvalds acornscsi_reconnect(host);
20861da177e4SLinus Torvalds else {
20871da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n",
20881da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
20891da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
20901da177e4SLinus Torvalds }
20911da177e4SLinus Torvalds return INTR_PROCESSING;
20921da177e4SLinus Torvalds
20931da177e4SLinus Torvalds case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */
20941da177e4SLinus Torvalds /*
20951da177e4SLinus Torvalds * Command reconnected - if MESGIN, get message - it may be
20961da177e4SLinus Torvalds * the tag. If not, get command out of disconnected queue
20971da177e4SLinus Torvalds */
20981da177e4SLinus Torvalds /*
20991da177e4SLinus Torvalds * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY,
21001da177e4SLinus Torvalds * reconnect I_T_L command
21011da177e4SLinus Torvalds */
21021da177e4SLinus Torvalds if (ssr != 0x8f && !acornscsi_reconnect_finish(host))
21031da177e4SLinus Torvalds return INTR_IDLE;
21041da177e4SLinus Torvalds ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
21051da177e4SLinus Torvalds switch (ssr) {
21061da177e4SLinus Torvalds case 0x88: /* data out phase */
21071da177e4SLinus Torvalds /* -> PHASE_DATAOUT */
21081da177e4SLinus Torvalds /* MESSAGE IN -> DATA OUT */
21091da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_OUT);
21101da177e4SLinus Torvalds if (!acornscsi_starttransfer(host))
2111756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
21121da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAOUT;
21131da177e4SLinus Torvalds return INTR_IDLE;
21141da177e4SLinus Torvalds
21151da177e4SLinus Torvalds case 0x89: /* data in phase */
21161da177e4SLinus Torvalds /* -> PHASE_DATAIN */
21171da177e4SLinus Torvalds /* MESSAGE IN -> DATA IN */
21181da177e4SLinus Torvalds acornscsi_dma_setup(host, DMA_IN);
21191da177e4SLinus Torvalds if (!acornscsi_starttransfer(host))
2120756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
21211da177e4SLinus Torvalds host->scsi.phase = PHASE_DATAIN;
21221da177e4SLinus Torvalds return INTR_IDLE;
21231da177e4SLinus Torvalds
21241da177e4SLinus Torvalds case 0x8a: /* command out */
21251da177e4SLinus Torvalds /* MESSAGE IN -> COMMAND */
21261da177e4SLinus Torvalds acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
21271da177e4SLinus Torvalds break;
21281da177e4SLinus Torvalds
21291da177e4SLinus Torvalds case 0x8b: /* status in */
21301da177e4SLinus Torvalds /* -> PHASE_STATUSIN */
21311da177e4SLinus Torvalds /* MESSAGE IN -> STATUS */
21321da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
21331da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
21341da177e4SLinus Torvalds break;
21351da177e4SLinus Torvalds
21361da177e4SLinus Torvalds case 0x8e: /* message out */
21371da177e4SLinus Torvalds /* -> PHASE_MSGOUT */
21381da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */
21391da177e4SLinus Torvalds acornscsi_sendmessage(host);
21401da177e4SLinus Torvalds break;
21411da177e4SLinus Torvalds
21421da177e4SLinus Torvalds case 0x8f: /* message in */
21431da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
21441da177e4SLinus Torvalds break;
21451da177e4SLinus Torvalds
21461da177e4SLinus Torvalds default:
21471da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n",
21481da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
21491da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
21501da177e4SLinus Torvalds }
21511da177e4SLinus Torvalds return INTR_PROCESSING;
21521da177e4SLinus Torvalds
21531da177e4SLinus Torvalds case PHASE_DATAIN: /* STATE: transferred data in */
21541da177e4SLinus Torvalds /*
21551da177e4SLinus Torvalds * This is simple - if we disconnect then the DMA address & count is
21561da177e4SLinus Torvalds * correct.
21571da177e4SLinus Torvalds */
21581da177e4SLinus Torvalds switch (ssr) {
21591da177e4SLinus Torvalds case 0x19: /* -> PHASE_DATAIN */
21601da177e4SLinus Torvalds case 0x89: /* -> PHASE_DATAIN */
2161756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
21621da177e4SLinus Torvalds return INTR_IDLE;
21631da177e4SLinus Torvalds
21641da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */
21651da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */
21661da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */
21671da177e4SLinus Torvalds /* DATA IN -> STATUS */
216884ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
21691da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
21701da177e4SLinus Torvalds acornscsi_dma_stop(host);
21711da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
21721da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
21731da177e4SLinus Torvalds break;
21741da177e4SLinus Torvalds
21751da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */
21761da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */
21771da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
21781da177e4SLinus Torvalds /* DATA IN -> MESSAGE OUT */
217984ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
21801da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
21811da177e4SLinus Torvalds acornscsi_dma_stop(host);
21821da177e4SLinus Torvalds acornscsi_sendmessage(host);
21831da177e4SLinus Torvalds break;
21841da177e4SLinus Torvalds
21851da177e4SLinus Torvalds case 0x1f: /* message in */
21861da177e4SLinus Torvalds case 0x4f: /* message in */
21871da177e4SLinus Torvalds case 0x8f: /* message in */
21881da177e4SLinus Torvalds /* DATA IN -> MESSAGE IN */
218984ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
21901da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
21911da177e4SLinus Torvalds acornscsi_dma_stop(host);
21921da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
21931da177e4SLinus Torvalds break;
21941da177e4SLinus Torvalds
21951da177e4SLinus Torvalds default:
21961da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n",
21971da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
21981da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
21991da177e4SLinus Torvalds }
22001da177e4SLinus Torvalds return INTR_PROCESSING;
22011da177e4SLinus Torvalds
22021da177e4SLinus Torvalds case PHASE_DATAOUT: /* STATE: transferred data out */
22031da177e4SLinus Torvalds /*
22041da177e4SLinus Torvalds * This is more complicated - if we disconnect, the DMA could be 12
22051da177e4SLinus Torvalds * bytes ahead of us. We need to correct this.
22061da177e4SLinus Torvalds */
22071da177e4SLinus Torvalds switch (ssr) {
22081da177e4SLinus Torvalds case 0x18: /* -> PHASE_DATAOUT */
22091da177e4SLinus Torvalds case 0x88: /* -> PHASE_DATAOUT */
2210756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
22111da177e4SLinus Torvalds return INTR_IDLE;
22121da177e4SLinus Torvalds
22131da177e4SLinus Torvalds case 0x1b: /* -> PHASE_STATUSIN */
22141da177e4SLinus Torvalds case 0x4b: /* -> PHASE_STATUSIN */
22151da177e4SLinus Torvalds case 0x8b: /* -> PHASE_STATUSIN */
22161da177e4SLinus Torvalds /* DATA OUT -> STATUS */
221784ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
22181da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
22191da177e4SLinus Torvalds acornscsi_dma_stop(host);
22201da177e4SLinus Torvalds acornscsi_dma_adjust(host);
22211da177e4SLinus Torvalds acornscsi_readstatusbyte(host);
22221da177e4SLinus Torvalds host->scsi.phase = PHASE_STATUSIN;
22231da177e4SLinus Torvalds break;
22241da177e4SLinus Torvalds
22251da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */
22261da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */
22271da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
22281da177e4SLinus Torvalds /* DATA OUT -> MESSAGE OUT */
222984ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
22301da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
22311da177e4SLinus Torvalds acornscsi_dma_stop(host);
22321da177e4SLinus Torvalds acornscsi_dma_adjust(host);
22331da177e4SLinus Torvalds acornscsi_sendmessage(host);
22341da177e4SLinus Torvalds break;
22351da177e4SLinus Torvalds
22361da177e4SLinus Torvalds case 0x1f: /* message in */
22371da177e4SLinus Torvalds case 0x4f: /* message in */
22381da177e4SLinus Torvalds case 0x8f: /* message in */
22391da177e4SLinus Torvalds /* DATA OUT -> MESSAGE IN */
224084ac86caSBoaz Harrosh host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
22411da177e4SLinus Torvalds acornscsi_sbic_xfcount(host);
22421da177e4SLinus Torvalds acornscsi_dma_stop(host);
22431da177e4SLinus Torvalds acornscsi_dma_adjust(host);
22441da177e4SLinus Torvalds acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
22451da177e4SLinus Torvalds break;
22461da177e4SLinus Torvalds
22471da177e4SLinus Torvalds default:
22481da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n",
22491da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
22501da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
22511da177e4SLinus Torvalds }
22521da177e4SLinus Torvalds return INTR_PROCESSING;
22531da177e4SLinus Torvalds
22541da177e4SLinus Torvalds case PHASE_STATUSIN: /* STATE: status in complete */
22551da177e4SLinus Torvalds switch (ssr) {
22561da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
22571da177e4SLinus Torvalds case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
22581da177e4SLinus Torvalds /* STATUS -> MESSAGE IN */
22591da177e4SLinus Torvalds acornscsi_message(host);
22601da177e4SLinus Torvalds break;
22611da177e4SLinus Torvalds
22621da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */
22631da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
22641da177e4SLinus Torvalds /* STATUS -> MESSAGE OUT */
22651da177e4SLinus Torvalds acornscsi_sendmessage(host);
22661da177e4SLinus Torvalds break;
22671da177e4SLinus Torvalds
22681da177e4SLinus Torvalds default:
22691da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n",
22701da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
22711da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
22721da177e4SLinus Torvalds }
22731da177e4SLinus Torvalds return INTR_PROCESSING;
22741da177e4SLinus Torvalds
22751da177e4SLinus Torvalds case PHASE_MSGIN: /* STATE: message in */
22761da177e4SLinus Torvalds switch (ssr) {
22771da177e4SLinus Torvalds case 0x1e: /* -> PHASE_MSGOUT */
22781da177e4SLinus Torvalds case 0x4e: /* -> PHASE_MSGOUT */
22791da177e4SLinus Torvalds case 0x8e: /* -> PHASE_MSGOUT */
22801da177e4SLinus Torvalds /* MESSAGE IN -> MESSAGE OUT */
22811da177e4SLinus Torvalds acornscsi_sendmessage(host);
22821da177e4SLinus Torvalds break;
22831da177e4SLinus Torvalds
22841da177e4SLinus Torvalds case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
22851da177e4SLinus Torvalds case 0x2f:
22861da177e4SLinus Torvalds case 0x4f:
22871da177e4SLinus Torvalds case 0x8f:
22881da177e4SLinus Torvalds acornscsi_message(host);
22891da177e4SLinus Torvalds break;
22901da177e4SLinus Torvalds
22911da177e4SLinus Torvalds case 0x85:
22921da177e4SLinus Torvalds printk("scsi%d.%c: strange message in disconnection\n",
22931da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host));
22941da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
22951da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ERROR);
22961da177e4SLinus Torvalds break;
22971da177e4SLinus Torvalds
22981da177e4SLinus Torvalds default:
22991da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n",
23001da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
23011da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
23021da177e4SLinus Torvalds }
23031da177e4SLinus Torvalds return INTR_PROCESSING;
23041da177e4SLinus Torvalds
23051da177e4SLinus Torvalds case PHASE_DONE: /* STATE: received status & message */
23061da177e4SLinus Torvalds switch (ssr) {
23071da177e4SLinus Torvalds case 0x85: /* -> PHASE_IDLE */
23081da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_OK);
23091da177e4SLinus Torvalds return INTR_NEXT_COMMAND;
23101da177e4SLinus Torvalds
23111da177e4SLinus Torvalds case 0x1e:
23121da177e4SLinus Torvalds case 0x8e:
23131da177e4SLinus Torvalds acornscsi_sendmessage(host);
23141da177e4SLinus Torvalds break;
23151da177e4SLinus Torvalds
23161da177e4SLinus Torvalds default:
23171da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n",
23181da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
23191da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
23201da177e4SLinus Torvalds }
23211da177e4SLinus Torvalds return INTR_PROCESSING;
23221da177e4SLinus Torvalds
23231da177e4SLinus Torvalds case PHASE_ABORTED:
23241da177e4SLinus Torvalds switch (ssr) {
23251da177e4SLinus Torvalds case 0x85:
23261da177e4SLinus Torvalds if (host->SCpnt)
23271da177e4SLinus Torvalds acornscsi_done(host, &host->SCpnt, DID_ABORT);
23281da177e4SLinus Torvalds else {
23291da177e4SLinus Torvalds clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun,
23301da177e4SLinus Torvalds host->busyluns);
23311da177e4SLinus Torvalds host->scsi.phase = PHASE_IDLE;
23321da177e4SLinus Torvalds }
23331da177e4SLinus Torvalds return INTR_NEXT_COMMAND;
23341da177e4SLinus Torvalds
23351da177e4SLinus Torvalds case 0x1e:
23361da177e4SLinus Torvalds case 0x2e:
23371da177e4SLinus Torvalds case 0x4e:
23381da177e4SLinus Torvalds case 0x8e:
23391da177e4SLinus Torvalds acornscsi_sendmessage(host);
23401da177e4SLinus Torvalds break;
23411da177e4SLinus Torvalds
23421da177e4SLinus Torvalds default:
23431da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n",
23441da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
23451da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
23461da177e4SLinus Torvalds }
23471da177e4SLinus Torvalds return INTR_PROCESSING;
23481da177e4SLinus Torvalds
23491da177e4SLinus Torvalds default:
23501da177e4SLinus Torvalds printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n",
23511da177e4SLinus Torvalds host->host->host_no, acornscsi_target(host), ssr);
23521da177e4SLinus Torvalds acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
23531da177e4SLinus Torvalds }
23541da177e4SLinus Torvalds return INTR_PROCESSING;
23551da177e4SLinus Torvalds }
23561da177e4SLinus Torvalds
23571da177e4SLinus Torvalds /*
23587d12e780SDavid Howells * Prototype: void acornscsi_intr(int irq, void *dev_id)
23591da177e4SLinus Torvalds * Purpose : handle interrupts from Acorn SCSI card
23601da177e4SLinus Torvalds * Params : irq - interrupt number
23611da177e4SLinus Torvalds * dev_id - device specific data (AS_Host structure)
23621da177e4SLinus Torvalds */
23631da177e4SLinus Torvalds static irqreturn_t
acornscsi_intr(int irq,void * dev_id)23647d12e780SDavid Howells acornscsi_intr(int irq, void *dev_id)
23651da177e4SLinus Torvalds {
23661da177e4SLinus Torvalds AS_Host *host = (AS_Host *)dev_id;
23671da177e4SLinus Torvalds intr_ret_t ret;
23681da177e4SLinus Torvalds int iostatus;
23691da177e4SLinus Torvalds int in_irq = 0;
23701da177e4SLinus Torvalds
23711da177e4SLinus Torvalds do {
23721da177e4SLinus Torvalds ret = INTR_IDLE;
23731da177e4SLinus Torvalds
2374e95a1b65SRussell King iostatus = readb(host->fast + INT_REG);
23751da177e4SLinus Torvalds
23761da177e4SLinus Torvalds if (iostatus & 2) {
23771da177e4SLinus Torvalds acornscsi_dma_intr(host);
2378e95a1b65SRussell King iostatus = readb(host->fast + INT_REG);
23791da177e4SLinus Torvalds }
23801da177e4SLinus Torvalds
23811da177e4SLinus Torvalds if (iostatus & 8)
23821da177e4SLinus Torvalds ret = acornscsi_sbicintr(host, in_irq);
23831da177e4SLinus Torvalds
23841da177e4SLinus Torvalds /*
23851da177e4SLinus Torvalds * If we have a transfer pending, start it.
23861da177e4SLinus Torvalds * Only start it if the interface has already started transferring
23871da177e4SLinus Torvalds * it's data
23881da177e4SLinus Torvalds */
23891da177e4SLinus Torvalds if (host->dma.xfer_required)
23901da177e4SLinus Torvalds acornscsi_dma_xfer(host);
23911da177e4SLinus Torvalds
23921da177e4SLinus Torvalds if (ret == INTR_NEXT_COMMAND)
23931da177e4SLinus Torvalds ret = acornscsi_kick(host);
23941da177e4SLinus Torvalds
23951da177e4SLinus Torvalds in_irq = 1;
23961da177e4SLinus Torvalds } while (ret != INTR_IDLE);
23971da177e4SLinus Torvalds
23981da177e4SLinus Torvalds return IRQ_HANDLED;
23991da177e4SLinus Torvalds }
24001da177e4SLinus Torvalds
24011da177e4SLinus Torvalds /*=============================================================================================
24021da177e4SLinus Torvalds * Interfaces between interrupt handler and rest of scsi code
24031da177e4SLinus Torvalds */
24041da177e4SLinus Torvalds
24051da177e4SLinus Torvalds /*
2406af049dfdSBart Van Assche * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd)
24071da177e4SLinus Torvalds * Purpose : queues a SCSI command
24081da177e4SLinus Torvalds * Params : cmd - SCSI command
24091da177e4SLinus Torvalds * Returns : 0, or < 0 on error.
24101da177e4SLinus Torvalds */
acornscsi_queuecmd_lck(struct scsi_cmnd * SCpnt)2411af049dfdSBart Van Assche static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt)
24121da177e4SLinus Torvalds {
2413dc417545SBart Van Assche struct scsi_pointer *scsi_pointer = arm_scsi_pointer(SCpnt);
2414af049dfdSBart Van Assche void (*done)(struct scsi_cmnd *) = scsi_done;
24151da177e4SLinus Torvalds AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
24161da177e4SLinus Torvalds
24171da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE)
24181da177e4SLinus Torvalds if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) {
24191da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n",
24201da177e4SLinus Torvalds host->host->host_no, '0' + SCpnt->device->id);
2421a9d2d806SHannes Reinecke set_host_byte(SCpnt, DID_NO_CONNECT);
24221da177e4SLinus Torvalds done(SCpnt);
24231da177e4SLinus Torvalds return 0;
24241da177e4SLinus Torvalds }
24251da177e4SLinus Torvalds #endif
24261da177e4SLinus Torvalds
24271da177e4SLinus Torvalds SCpnt->host_scribble = NULL;
24281da177e4SLinus Torvalds SCpnt->result = 0;
2429dc417545SBart Van Assche scsi_pointer->phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]);
2430dc417545SBart Van Assche scsi_pointer->sent_command = 0;
2431dc417545SBart Van Assche scsi_pointer->scsi_xferred = 0;
24321da177e4SLinus Torvalds
24331da177e4SLinus Torvalds init_SCp(SCpnt);
24341da177e4SLinus Torvalds
24351da177e4SLinus Torvalds host->stats.queues += 1;
24361da177e4SLinus Torvalds
24371da177e4SLinus Torvalds {
24381da177e4SLinus Torvalds unsigned long flags;
24391da177e4SLinus Torvalds
24401da177e4SLinus Torvalds if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) {
2441a9d2d806SHannes Reinecke set_host_byte(SCpnt, DID_ERROR);
24421da177e4SLinus Torvalds done(SCpnt);
24431da177e4SLinus Torvalds return 0;
24441da177e4SLinus Torvalds }
24451da177e4SLinus Torvalds local_irq_save(flags);
24461da177e4SLinus Torvalds if (host->scsi.phase == PHASE_IDLE)
24471da177e4SLinus Torvalds acornscsi_kick(host);
24481da177e4SLinus Torvalds local_irq_restore(flags);
24491da177e4SLinus Torvalds }
24501da177e4SLinus Torvalds return 0;
24511da177e4SLinus Torvalds }
24521da177e4SLinus Torvalds
2453f281233dSJeff Garzik DEF_SCSI_QCMD(acornscsi_queuecmd)
2454f281233dSJeff Garzik
24551da177e4SLinus Torvalds enum res_abort { res_not_running, res_success, res_success_clear, res_snooze };
24561da177e4SLinus Torvalds
24571da177e4SLinus Torvalds /*
2458ee0ca6baSHenne * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt)
24591da177e4SLinus Torvalds * Purpose : abort a command on this host
24601da177e4SLinus Torvalds * Params : SCpnt - command to abort
24611da177e4SLinus Torvalds * Returns : our abort status
24621da177e4SLinus Torvalds */
acornscsi_do_abort(AS_Host * host,struct scsi_cmnd * SCpnt)2463ee0ca6baSHenne static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt)
24641da177e4SLinus Torvalds {
24651da177e4SLinus Torvalds enum res_abort res = res_not_running;
24661da177e4SLinus Torvalds
24671da177e4SLinus Torvalds if (queue_remove_cmd(&host->queues.issue, SCpnt)) {
24681da177e4SLinus Torvalds /*
24691da177e4SLinus Torvalds * The command was on the issue queue, and has not been
24701da177e4SLinus Torvalds * issued yet. We can remove the command from the queue,
24711da177e4SLinus Torvalds * and acknowledge the abort. Neither the devices nor the
24721da177e4SLinus Torvalds * interface know about the command.
24731da177e4SLinus Torvalds */
24741da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
24751da177e4SLinus Torvalds printk("on issue queue ");
24761da177e4SLinus Torvalds //#endif
24771da177e4SLinus Torvalds res = res_success;
24781da177e4SLinus Torvalds } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) {
24791da177e4SLinus Torvalds /*
24801da177e4SLinus Torvalds * The command was on the disconnected queue. Simply
24811da177e4SLinus Torvalds * acknowledge the abort condition, and when the target
24821da177e4SLinus Torvalds * reconnects, we will give it an ABORT message. The
24831da177e4SLinus Torvalds * target should then disconnect, and we will clear
24841da177e4SLinus Torvalds * the busylun bit.
24851da177e4SLinus Torvalds */
24861da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
24871da177e4SLinus Torvalds printk("on disconnected queue ");
24881da177e4SLinus Torvalds //#endif
24891da177e4SLinus Torvalds res = res_success;
24901da177e4SLinus Torvalds } else if (host->SCpnt == SCpnt) {
24911da177e4SLinus Torvalds unsigned long flags;
24921da177e4SLinus Torvalds
24931da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
24941da177e4SLinus Torvalds printk("executing ");
24951da177e4SLinus Torvalds //#endif
24961da177e4SLinus Torvalds
24971da177e4SLinus Torvalds local_irq_save(flags);
24981da177e4SLinus Torvalds switch (host->scsi.phase) {
24991da177e4SLinus Torvalds /*
25001da177e4SLinus Torvalds * If the interface is idle, and the command is 'disconnectable',
25011da177e4SLinus Torvalds * then it is the same as on the disconnected queue. We simply
25021da177e4SLinus Torvalds * remove all traces of the command. When the target reconnects,
25031da177e4SLinus Torvalds * we will give it an ABORT message since the command could not
25041da177e4SLinus Torvalds * be found. When the target finally disconnects, we will clear
25051da177e4SLinus Torvalds * the busylun bit.
25061da177e4SLinus Torvalds */
25071da177e4SLinus Torvalds case PHASE_IDLE:
25081da177e4SLinus Torvalds if (host->scsi.disconnectable) {
25091da177e4SLinus Torvalds host->scsi.disconnectable = 0;
25101da177e4SLinus Torvalds host->SCpnt = NULL;
25111da177e4SLinus Torvalds res = res_success;
25121da177e4SLinus Torvalds }
25131da177e4SLinus Torvalds break;
25141da177e4SLinus Torvalds
25151da177e4SLinus Torvalds /*
25161da177e4SLinus Torvalds * If the command has connected and done nothing further,
25171da177e4SLinus Torvalds * simply force a disconnect. We also need to clear the
25181da177e4SLinus Torvalds * busylun bit.
25191da177e4SLinus Torvalds */
25201da177e4SLinus Torvalds case PHASE_CONNECTED:
2521ffd7858dSRussell King sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT);
25221da177e4SLinus Torvalds host->SCpnt = NULL;
25231da177e4SLinus Torvalds res = res_success_clear;
25241da177e4SLinus Torvalds break;
25251da177e4SLinus Torvalds
25261da177e4SLinus Torvalds default:
2527756fb6a8SHannes Reinecke acornscsi_abortcmd(host);
25281da177e4SLinus Torvalds res = res_snooze;
25291da177e4SLinus Torvalds }
25301da177e4SLinus Torvalds local_irq_restore(flags);
25311da177e4SLinus Torvalds } else if (host->origSCpnt == SCpnt) {
25321da177e4SLinus Torvalds /*
25331da177e4SLinus Torvalds * The command will be executed next, but a command
25341da177e4SLinus Torvalds * is currently using the interface. This is similar to
25351da177e4SLinus Torvalds * being on the issue queue, except the busylun bit has
25361da177e4SLinus Torvalds * been set.
25371da177e4SLinus Torvalds */
25381da177e4SLinus Torvalds host->origSCpnt = NULL;
25391da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
25401da177e4SLinus Torvalds printk("waiting for execution ");
25411da177e4SLinus Torvalds //#endif
25421da177e4SLinus Torvalds res = res_success_clear;
25431da177e4SLinus Torvalds } else
25441da177e4SLinus Torvalds printk("unknown ");
25451da177e4SLinus Torvalds
25461da177e4SLinus Torvalds return res;
25471da177e4SLinus Torvalds }
25481da177e4SLinus Torvalds
25491da177e4SLinus Torvalds /*
2550ee0ca6baSHenne * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt)
25511da177e4SLinus Torvalds * Purpose : abort a command on this host
25521da177e4SLinus Torvalds * Params : SCpnt - command to abort
25531da177e4SLinus Torvalds * Returns : one of SCSI_ABORT_ macros
25541da177e4SLinus Torvalds */
acornscsi_abort(struct scsi_cmnd * SCpnt)2555ee0ca6baSHenne int acornscsi_abort(struct scsi_cmnd *SCpnt)
25561da177e4SLinus Torvalds {
25571da177e4SLinus Torvalds AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata;
25581da177e4SLinus Torvalds int result;
25591da177e4SLinus Torvalds
25601da177e4SLinus Torvalds host->stats.aborts += 1;
25611da177e4SLinus Torvalds
25621da177e4SLinus Torvalds #if (DEBUG & DEBUG_ABORT)
25631da177e4SLinus Torvalds {
25641da177e4SLinus Torvalds int asr, ssr;
2565ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
2566ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR);
25671da177e4SLinus Torvalds
25681da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_abort: ");
25691da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase);
25701da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id);
25711da177e4SLinus Torvalds }
25721da177e4SLinus Torvalds #endif
25731da177e4SLinus Torvalds
25741da177e4SLinus Torvalds printk("scsi%d: ", host->host->host_no);
25751da177e4SLinus Torvalds
25761da177e4SLinus Torvalds switch (acornscsi_do_abort(host, SCpnt)) {
25771da177e4SLinus Torvalds /*
25781da177e4SLinus Torvalds * We managed to find the command and cleared it out.
25791da177e4SLinus Torvalds * We do not expect the command to be executing on the
25801da177e4SLinus Torvalds * target, but we have set the busylun bit.
25811da177e4SLinus Torvalds */
25821da177e4SLinus Torvalds case res_success_clear:
25831da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
25841da177e4SLinus Torvalds printk("clear ");
25851da177e4SLinus Torvalds //#endif
25869cb78c16SHannes Reinecke clear_bit(SCpnt->device->id * 8 +
25879cb78c16SHannes Reinecke (u8)(SCpnt->device->lun & 0x7), host->busyluns);
2588eb4f520cSGustavo A. R. Silva fallthrough;
25891da177e4SLinus Torvalds
25901da177e4SLinus Torvalds /*
25911da177e4SLinus Torvalds * We found the command, and cleared it out. Either
25921da177e4SLinus Torvalds * the command is still known to be executing on the
25931da177e4SLinus Torvalds * target, or the busylun bit is not set.
25941da177e4SLinus Torvalds */
25951da177e4SLinus Torvalds case res_success:
25961da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
25971da177e4SLinus Torvalds printk("success\n");
25981da177e4SLinus Torvalds //#endif
2599324b9337SRussell King result = SUCCESS;
26001da177e4SLinus Torvalds break;
26011da177e4SLinus Torvalds
26021da177e4SLinus Torvalds /*
26031da177e4SLinus Torvalds * We did find the command, but unfortunately we couldn't
26041da177e4SLinus Torvalds * unhook it from ourselves. Wait some more, and if it
26051da177e4SLinus Torvalds * still doesn't complete, reset the interface.
26061da177e4SLinus Torvalds */
26071da177e4SLinus Torvalds case res_snooze:
26081da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
26091da177e4SLinus Torvalds printk("snooze\n");
26101da177e4SLinus Torvalds //#endif
2611324b9337SRussell King result = FAILED;
26121da177e4SLinus Torvalds break;
26131da177e4SLinus Torvalds
26141da177e4SLinus Torvalds /*
26151da177e4SLinus Torvalds * The command could not be found (either because it completed,
26161da177e4SLinus Torvalds * or it got dropped.
26171da177e4SLinus Torvalds */
26181da177e4SLinus Torvalds default:
26191da177e4SLinus Torvalds case res_not_running:
26201da177e4SLinus Torvalds acornscsi_dumplog(host, SCpnt->device->id);
2621324b9337SRussell King result = FAILED;
26221da177e4SLinus Torvalds //#if (DEBUG & DEBUG_ABORT)
26231da177e4SLinus Torvalds printk("not running\n");
26241da177e4SLinus Torvalds //#endif
26251da177e4SLinus Torvalds break;
26261da177e4SLinus Torvalds }
26271da177e4SLinus Torvalds
26281da177e4SLinus Torvalds return result;
26291da177e4SLinus Torvalds }
26301da177e4SLinus Torvalds
26311da177e4SLinus Torvalds /*
2632324b9337SRussell King * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt)
26331da177e4SLinus Torvalds * Purpose : reset a command on this host/reset this host
26341da177e4SLinus Torvalds * Params : SCpnt - command causing reset
26351da177e4SLinus Torvalds * Returns : one of SCSI_RESET_ macros
26361da177e4SLinus Torvalds */
acornscsi_host_reset(struct scsi_cmnd * SCpnt)2637fd536998SArnd Bergmann int acornscsi_host_reset(struct scsi_cmnd *SCpnt)
26381da177e4SLinus Torvalds {
2639fd536998SArnd Bergmann AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
2640ee0ca6baSHenne struct scsi_cmnd *SCptr;
26411da177e4SLinus Torvalds
26421da177e4SLinus Torvalds host->stats.resets += 1;
26431da177e4SLinus Torvalds
26441da177e4SLinus Torvalds #if (DEBUG & DEBUG_RESET)
26451da177e4SLinus Torvalds {
264674fa80eeSHannes Reinecke int asr, ssr, devidx;
26471da177e4SLinus Torvalds
2648ffd7858dSRussell King asr = sbic_arm_read(host, SBIC_ASR);
2649ffd7858dSRussell King ssr = sbic_arm_read(host, SBIC_SSR);
26501da177e4SLinus Torvalds
26511da177e4SLinus Torvalds printk(KERN_WARNING "acornscsi_reset: ");
26521da177e4SLinus Torvalds print_sbic_status(asr, ssr, host->scsi.phase);
2653fd536998SArnd Bergmann for (devidx = 0; devidx < 9; devidx++)
265474fa80eeSHannes Reinecke acornscsi_dumplog(host, devidx);
26551da177e4SLinus Torvalds }
26561da177e4SLinus Torvalds #endif
26571da177e4SLinus Torvalds
26581da177e4SLinus Torvalds acornscsi_dma_stop(host);
26591da177e4SLinus Torvalds
26601da177e4SLinus Torvalds /*
26611da177e4SLinus Torvalds * do hard reset. This resets all devices on this host, and so we
26621da177e4SLinus Torvalds * must set the reset status on all commands.
26631da177e4SLinus Torvalds */
26641da177e4SLinus Torvalds acornscsi_resetcard(host);
26651da177e4SLinus Torvalds
26661da177e4SLinus Torvalds while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL)
2667324b9337SRussell King ;
26681da177e4SLinus Torvalds
2669324b9337SRussell King return SUCCESS;
26701da177e4SLinus Torvalds }
26711da177e4SLinus Torvalds
26721da177e4SLinus Torvalds /*==============================================================================================
26731da177e4SLinus Torvalds * initialisation & miscellaneous support
26741da177e4SLinus Torvalds */
26751da177e4SLinus Torvalds
26761da177e4SLinus Torvalds /*
26771da177e4SLinus Torvalds * Function: char *acornscsi_info(struct Scsi_Host *host)
26781da177e4SLinus Torvalds * Purpose : return a string describing this interface
26791da177e4SLinus Torvalds * Params : host - host to give information on
26801da177e4SLinus Torvalds * Returns : a constant string
26811da177e4SLinus Torvalds */
26821da177e4SLinus Torvalds const
acornscsi_info(struct Scsi_Host * host)26831da177e4SLinus Torvalds char *acornscsi_info(struct Scsi_Host *host)
26841da177e4SLinus Torvalds {
26851da177e4SLinus Torvalds static char string[100], *p;
26861da177e4SLinus Torvalds
26871da177e4SLinus Torvalds p = string;
26881da177e4SLinus Torvalds
26891da177e4SLinus Torvalds p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d"
26901da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC
26911da177e4SLinus Torvalds " SYNC"
26921da177e4SLinus Torvalds #endif
26931da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE)
2694a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")"
26951da177e4SLinus Torvalds #endif
26961da177e4SLinus Torvalds , host->hostt->name, host->io_port, host->irq,
26971da177e4SLinus Torvalds VER_MAJOR, VER_MINOR, VER_PATCH);
26981da177e4SLinus Torvalds return string;
26991da177e4SLinus Torvalds }
27001da177e4SLinus Torvalds
acornscsi_show_info(struct seq_file * m,struct Scsi_Host * instance)270156b8e8e5SAl Viro static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance)
27021da177e4SLinus Torvalds {
270356b8e8e5SAl Viro int devidx;
2704f64a181dSChristoph Hellwig struct scsi_device *scd;
27051da177e4SLinus Torvalds AS_Host *host;
27061da177e4SLinus Torvalds
27071da177e4SLinus Torvalds host = (AS_Host *)instance->hostdata;
27081da177e4SLinus Torvalds
270956b8e8e5SAl Viro seq_printf(m, "AcornSCSI driver v%d.%d.%d"
27101da177e4SLinus Torvalds #ifdef CONFIG_SCSI_ACORNSCSI_SYNC
27111da177e4SLinus Torvalds " SYNC"
27121da177e4SLinus Torvalds #endif
27131da177e4SLinus Torvalds #if (DEBUG & DEBUG_NO_WRITE)
2714a796ef70SRussell King " NOWRITE (" __stringify(NO_WRITE) ")"
27151da177e4SLinus Torvalds #endif
27161da177e4SLinus Torvalds "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH);
27171da177e4SLinus Torvalds
271856b8e8e5SAl Viro seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n",
2719e95a1b65SRussell King host->base + SBIC_REGIDX, host->scsi.irq);
27201da177e4SLinus Torvalds #ifdef USE_DMAC
272156b8e8e5SAl Viro seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n",
2722e95a1b65SRussell King host->base + DMAC_OFFSET, host->scsi.irq);
27231da177e4SLinus Torvalds #endif
27241da177e4SLinus Torvalds
272556b8e8e5SAl Viro seq_printf(m, "Statistics:\n"
27261da177e4SLinus Torvalds "Queued commands: %-10u Issued commands: %-10u\n"
27271da177e4SLinus Torvalds "Done commands : %-10u Reads : %-10u\n"
27281da177e4SLinus Torvalds "Writes : %-10u Others : %-10u\n"
27291da177e4SLinus Torvalds "Disconnects : %-10u Aborts : %-10u\n"
27301da177e4SLinus Torvalds "Resets : %-10u\n\nLast phases:",
27311da177e4SLinus Torvalds host->stats.queues, host->stats.removes,
27321da177e4SLinus Torvalds host->stats.fins, host->stats.reads,
27331da177e4SLinus Torvalds host->stats.writes, host->stats.miscs,
27341da177e4SLinus Torvalds host->stats.disconnects, host->stats.aborts,
27351da177e4SLinus Torvalds host->stats.resets);
27361da177e4SLinus Torvalds
27371da177e4SLinus Torvalds for (devidx = 0; devidx < 9; devidx ++) {
27381da177e4SLinus Torvalds unsigned int statptr, prev;
27391da177e4SLinus Torvalds
274056b8e8e5SAl Viro seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx));
27411da177e4SLinus Torvalds statptr = host->status_ptr[devidx] - 10;
27421da177e4SLinus Torvalds
27431da177e4SLinus Torvalds if ((signed int)statptr < 0)
27441da177e4SLinus Torvalds statptr += STATUS_BUFFER_SIZE;
27451da177e4SLinus Torvalds
27461da177e4SLinus Torvalds prev = host->status[devidx][statptr].when;
27471da177e4SLinus Torvalds
27481da177e4SLinus Torvalds for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
27491da177e4SLinus Torvalds if (host->status[devidx][statptr].when) {
275056b8e8e5SAl Viro seq_printf(m, "%c%02X:%02X+%2ld",
27511da177e4SLinus Torvalds host->status[devidx][statptr].irq ? '-' : ' ',
27521da177e4SLinus Torvalds host->status[devidx][statptr].ph,
27531da177e4SLinus Torvalds host->status[devidx][statptr].ssr,
27541da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) < 100 ?
27551da177e4SLinus Torvalds (host->status[devidx][statptr].when - prev) : 99);
27561da177e4SLinus Torvalds prev = host->status[devidx][statptr].when;
27571da177e4SLinus Torvalds }
27581da177e4SLinus Torvalds }
27591da177e4SLinus Torvalds }
27601da177e4SLinus Torvalds
276156b8e8e5SAl Viro seq_printf(m, "\nAttached devices:\n");
27621da177e4SLinus Torvalds
27631da177e4SLinus Torvalds shost_for_each_device(scd, instance) {
276456b8e8e5SAl Viro seq_printf(m, "Device/Lun TaggedQ Sync\n");
27659cb78c16SHannes Reinecke seq_printf(m, " %d/%llu ", scd->id, scd->lun);
27661da177e4SLinus Torvalds if (scd->tagged_supported)
2767756fb6a8SHannes Reinecke seq_printf(m, "%3sabled ",
2768756fb6a8SHannes Reinecke scd->simple_tags ? "en" : "dis");
27691da177e4SLinus Torvalds else
277056b8e8e5SAl Viro seq_printf(m, "unsupported ");
27711da177e4SLinus Torvalds
27721da177e4SLinus Torvalds if (host->device[scd->id].sync_xfer & 15)
277356b8e8e5SAl Viro seq_printf(m, "offset %d, %d ns\n",
27741da177e4SLinus Torvalds host->device[scd->id].sync_xfer & 15,
27751da177e4SLinus Torvalds acornscsi_getperiod(host->device[scd->id].sync_xfer));
27761da177e4SLinus Torvalds else
277756b8e8e5SAl Viro seq_printf(m, "async\n");
27781da177e4SLinus Torvalds
27791da177e4SLinus Torvalds }
278056b8e8e5SAl Viro return 0;
27811da177e4SLinus Torvalds }
27821da177e4SLinus Torvalds
2783*5d94e575SBart Van Assche static const struct scsi_host_template acornscsi_template = {
27841da177e4SLinus Torvalds .module = THIS_MODULE,
278556b8e8e5SAl Viro .show_info = acornscsi_show_info,
27861da177e4SLinus Torvalds .name = "AcornSCSI",
27871da177e4SLinus Torvalds .info = acornscsi_info,
27881da177e4SLinus Torvalds .queuecommand = acornscsi_queuecmd,
2789324b9337SRussell King .eh_abort_handler = acornscsi_abort,
279074fa80eeSHannes Reinecke .eh_host_reset_handler = acornscsi_host_reset,
27911da177e4SLinus Torvalds .can_queue = 16,
27921da177e4SLinus Torvalds .this_id = 7,
27931da177e4SLinus Torvalds .sg_tablesize = SG_ALL,
27941da177e4SLinus Torvalds .cmd_per_lun = 2,
27954af14d11SChristoph Hellwig .dma_boundary = PAGE_SIZE - 1,
27961da177e4SLinus Torvalds .proc_name = "acornscsi",
2797dc417545SBart Van Assche .cmd_size = sizeof(struct arm_cmd_priv),
27981da177e4SLinus Torvalds };
27991da177e4SLinus Torvalds
acornscsi_probe(struct expansion_card * ec,const struct ecard_id * id)28006f039790SGreg Kroah-Hartman static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
28011da177e4SLinus Torvalds {
28021da177e4SLinus Torvalds struct Scsi_Host *host;
28031da177e4SLinus Torvalds AS_Host *ashost;
2804e95a1b65SRussell King int ret;
2805e95a1b65SRussell King
2806e95a1b65SRussell King ret = ecard_request_resources(ec);
2807e95a1b65SRussell King if (ret)
2808e95a1b65SRussell King goto out;
28091da177e4SLinus Torvalds
28101da177e4SLinus Torvalds host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host));
2811e95a1b65SRussell King if (!host) {
2812e95a1b65SRussell King ret = -ENOMEM;
2813e95a1b65SRussell King goto out_release;
2814e95a1b65SRussell King }
28151da177e4SLinus Torvalds
28161da177e4SLinus Torvalds ashost = (AS_Host *)host->hostdata;
28171da177e4SLinus Torvalds
2818e95a1b65SRussell King ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
2819e95a1b65SRussell King ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
282042c76c98SChristophe JAILLET if (!ashost->base || !ashost->fast) {
282142c76c98SChristophe JAILLET ret = -ENOMEM;
2822e95a1b65SRussell King goto out_put;
282342c76c98SChristophe JAILLET }
2824e95a1b65SRussell King
28251da177e4SLinus Torvalds host->irq = ec->irq;
28261da177e4SLinus Torvalds ashost->host = host;
28271da177e4SLinus Torvalds ashost->scsi.irq = host->irq;
28281da177e4SLinus Torvalds
2829e95a1b65SRussell King ec->irqaddr = ashost->fast + INT_REG;
28301da177e4SLinus Torvalds ec->irqmask = 0x0a;
28311da177e4SLinus Torvalds
28324909cc2bSMichael Opdenacker ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost);
28331da177e4SLinus Torvalds if (ret) {
28341da177e4SLinus Torvalds printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n",
28351da177e4SLinus Torvalds host->host_no, ashost->scsi.irq, ret);
2836e95a1b65SRussell King goto out_put;
28371da177e4SLinus Torvalds }
28381da177e4SLinus Torvalds
28391da177e4SLinus Torvalds memset(&ashost->stats, 0, sizeof (ashost->stats));
28401da177e4SLinus Torvalds queue_initialise(&ashost->queues.issue);
28411da177e4SLinus Torvalds queue_initialise(&ashost->queues.disconnected);
28421da177e4SLinus Torvalds msgqueue_initialise(&ashost->scsi.msgs);
28431da177e4SLinus Torvalds
28441da177e4SLinus Torvalds acornscsi_resetcard(ashost);
28451da177e4SLinus Torvalds
28461da177e4SLinus Torvalds ret = scsi_add_host(host, &ec->dev);
28471da177e4SLinus Torvalds if (ret)
2848e95a1b65SRussell King goto out_irq;
28491da177e4SLinus Torvalds
28501da177e4SLinus Torvalds scsi_scan_host(host);
28511da177e4SLinus Torvalds goto out;
28521da177e4SLinus Torvalds
2853e95a1b65SRussell King out_irq:
28541da177e4SLinus Torvalds free_irq(host->irq, ashost);
2855e95a1b65SRussell King msgqueue_free(&ashost->scsi.msgs);
2856e95a1b65SRussell King queue_free(&ashost->queues.disconnected);
2857e95a1b65SRussell King queue_free(&ashost->queues.issue);
2858e95a1b65SRussell King out_put:
2859e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast);
2860e95a1b65SRussell King ecardm_iounmap(ec, ashost->base);
28611da177e4SLinus Torvalds scsi_host_put(host);
2862e95a1b65SRussell King out_release:
2863e95a1b65SRussell King ecard_release_resources(ec);
28641da177e4SLinus Torvalds out:
28651da177e4SLinus Torvalds return ret;
28661da177e4SLinus Torvalds }
28671da177e4SLinus Torvalds
acornscsi_remove(struct expansion_card * ec)28686f039790SGreg Kroah-Hartman static void acornscsi_remove(struct expansion_card *ec)
28691da177e4SLinus Torvalds {
28701da177e4SLinus Torvalds struct Scsi_Host *host = ecard_get_drvdata(ec);
28711da177e4SLinus Torvalds AS_Host *ashost = (AS_Host *)host->hostdata;
28721da177e4SLinus Torvalds
28731da177e4SLinus Torvalds ecard_set_drvdata(ec, NULL);
28741da177e4SLinus Torvalds scsi_remove_host(host);
28751da177e4SLinus Torvalds
28761da177e4SLinus Torvalds /*
28771da177e4SLinus Torvalds * Put card into RESET state
28781da177e4SLinus Torvalds */
2879e95a1b65SRussell King writeb(0x80, ashost->fast + PAGE_REG);
28801da177e4SLinus Torvalds
28811da177e4SLinus Torvalds free_irq(host->irq, ashost);
28821da177e4SLinus Torvalds
28831da177e4SLinus Torvalds msgqueue_free(&ashost->scsi.msgs);
28841da177e4SLinus Torvalds queue_free(&ashost->queues.disconnected);
28851da177e4SLinus Torvalds queue_free(&ashost->queues.issue);
2886e95a1b65SRussell King ecardm_iounmap(ec, ashost->fast);
2887e95a1b65SRussell King ecardm_iounmap(ec, ashost->base);
28881da177e4SLinus Torvalds scsi_host_put(host);
2889e95a1b65SRussell King ecard_release_resources(ec);
28901da177e4SLinus Torvalds }
28911da177e4SLinus Torvalds
28921da177e4SLinus Torvalds static const struct ecard_id acornscsi_cids[] = {
28931da177e4SLinus Torvalds { MANU_ACORN, PROD_ACORN_SCSI },
28941da177e4SLinus Torvalds { 0xffff, 0xffff },
28951da177e4SLinus Torvalds };
28961da177e4SLinus Torvalds
28971da177e4SLinus Torvalds static struct ecard_driver acornscsi_driver = {
28981da177e4SLinus Torvalds .probe = acornscsi_probe,
28996f039790SGreg Kroah-Hartman .remove = acornscsi_remove,
29001da177e4SLinus Torvalds .id_table = acornscsi_cids,
29011da177e4SLinus Torvalds .drv = {
29021da177e4SLinus Torvalds .name = "acornscsi",
29031da177e4SLinus Torvalds },
29041da177e4SLinus Torvalds };
29051da177e4SLinus Torvalds
acornscsi_init(void)29061da177e4SLinus Torvalds static int __init acornscsi_init(void)
29071da177e4SLinus Torvalds {
29081da177e4SLinus Torvalds return ecard_register_driver(&acornscsi_driver);
29091da177e4SLinus Torvalds }
29101da177e4SLinus Torvalds
acornscsi_exit(void)29111da177e4SLinus Torvalds static void __exit acornscsi_exit(void)
29121da177e4SLinus Torvalds {
29131da177e4SLinus Torvalds ecard_remove_driver(&acornscsi_driver);
29141da177e4SLinus Torvalds }
29151da177e4SLinus Torvalds
29161da177e4SLinus Torvalds module_init(acornscsi_init);
29171da177e4SLinus Torvalds module_exit(acornscsi_exit);
29181da177e4SLinus Torvalds
29191da177e4SLinus Torvalds MODULE_AUTHOR("Russell King");
29201da177e4SLinus Torvalds MODULE_DESCRIPTION("AcornSCSI driver");
29211da177e4SLinus Torvalds MODULE_LICENSE("GPL");
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