Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/acorn/scsi/acornscsi.c |
| 3 | * |
| 4 | * Acorn SCSI 3 driver |
| 5 | * By R.M.King. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Abandoned using the Select and Transfer command since there were |
| 12 | * some nasty races between our software and the target devices that |
| 13 | * were not easy to solve, and the device errata had a lot of entries |
| 14 | * for this command, some of them quite nasty... |
| 15 | * |
| 16 | * Changelog: |
| 17 | * 26-Sep-1997 RMK Re-jigged to use the queue module. |
| 18 | * Re-coded state machine to be based on driver |
| 19 | * state not scsi state. Should be easier to debug. |
| 20 | * Added acornscsi_release to clean up properly. |
| 21 | * Updated proc/scsi reporting. |
| 22 | * 05-Oct-1997 RMK Implemented writing to SCSI devices. |
| 23 | * 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/ |
| 24 | * reconnect race condition causing a warning message. |
| 25 | * 12-Oct-1997 RMK Added catch for re-entering interrupt routine. |
| 26 | * 15-Oct-1997 RMK Improved handling of commands. |
| 27 | * 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h. |
| 28 | * 13-Dec-1998 RMK Better abort code and command handling. Extra state |
| 29 | * transitions added to allow dodgy devices to work. |
| 30 | */ |
| 31 | #define DEBUG_NO_WRITE 1 |
| 32 | #define DEBUG_QUEUES 2 |
| 33 | #define DEBUG_DMA 4 |
| 34 | #define DEBUG_ABORT 8 |
| 35 | #define DEBUG_DISCON 16 |
| 36 | #define DEBUG_CONNECT 32 |
| 37 | #define DEBUG_PHASES 64 |
| 38 | #define DEBUG_WRITE 128 |
| 39 | #define DEBUG_LINK 256 |
| 40 | #define DEBUG_MESSAGES 512 |
| 41 | #define DEBUG_RESET 1024 |
| 42 | #define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\ |
| 43 | DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\ |
| 44 | DEBUG_DMA|DEBUG_QUEUES) |
| 45 | |
| 46 | /* DRIVER CONFIGURATION |
| 47 | * |
| 48 | * SCSI-II Tagged queue support. |
| 49 | * |
| 50 | * I don't have any SCSI devices that support it, so it is totally untested |
| 51 | * (except to make sure that it doesn't interfere with any non-tagging |
| 52 | * devices). It is not fully implemented either - what happens when a |
| 53 | * tagging device reconnects??? |
| 54 | * |
| 55 | * You can tell if you have a device that supports tagged queueing my |
| 56 | * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported |
| 57 | * as '2 TAG'. |
| 58 | * |
| 59 | * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config |
| 60 | * scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug, |
| 61 | * comment out the undef. |
| 62 | */ |
| 63 | #undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 64 | /* |
| 65 | * SCSI-II Linked command support. |
| 66 | * |
| 67 | * The higher level code doesn't support linked commands yet, and so the option |
| 68 | * is undef'd here. |
| 69 | */ |
| 70 | #undef CONFIG_SCSI_ACORNSCSI_LINK |
| 71 | /* |
| 72 | * SCSI-II Synchronous transfer support. |
| 73 | * |
| 74 | * Tried and tested... |
| 75 | * |
| 76 | * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) |
| 77 | * SDTR_PERIOD - period of REQ signal (min=125, max=1020) |
| 78 | * DEFAULT_PERIOD - default REQ period. |
| 79 | */ |
| 80 | #define SDTR_SIZE 12 |
| 81 | #define SDTR_PERIOD 125 |
| 82 | #define DEFAULT_PERIOD 500 |
| 83 | |
| 84 | /* |
| 85 | * Debugging information |
| 86 | * |
| 87 | * DEBUG - bit mask from list above |
| 88 | * DEBUG_TARGET - is defined to the target number if you want to debug |
| 89 | * a specific target. [only recon/write/dma]. |
| 90 | */ |
| 91 | #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) |
| 92 | /* only allow writing to SCSI device 0 */ |
| 93 | #define NO_WRITE 0xFE |
| 94 | /*#define DEBUG_TARGET 2*/ |
| 95 | /* |
| 96 | * Select timeout time (in 10ms units) |
| 97 | * |
| 98 | * This is the timeout used between the start of selection and the WD33C93 |
| 99 | * chip deciding that the device isn't responding. |
| 100 | */ |
| 101 | #define TIMEOUT_TIME 10 |
| 102 | /* |
| 103 | * Define this if you want to have verbose explaination of SCSI |
| 104 | * status/messages. |
| 105 | */ |
| 106 | #undef CONFIG_ACORNSCSI_CONSTANTS |
| 107 | /* |
| 108 | * Define this if you want to use the on board DMAC [don't remove this option] |
| 109 | * If not set, then use PIO mode (not currently supported). |
| 110 | */ |
| 111 | #define USE_DMAC |
| 112 | |
| 113 | /* |
| 114 | * ==================================================================================== |
| 115 | */ |
| 116 | |
| 117 | #ifdef DEBUG_TARGET |
| 118 | #define DBG(cmd,xxx...) \ |
| 119 | if (cmd->device->id == DEBUG_TARGET) { \ |
| 120 | xxx; \ |
| 121 | } |
| 122 | #else |
| 123 | #define DBG(cmd,xxx...) xxx |
| 124 | #endif |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | #include <linux/module.h> |
| 127 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #include <linux/string.h> |
| 129 | #include <linux/signal.h> |
| 130 | #include <linux/errno.h> |
| 131 | #include <linux/proc_fs.h> |
| 132 | #include <linux/ioport.h> |
| 133 | #include <linux/blkdev.h> |
| 134 | #include <linux/delay.h> |
| 135 | #include <linux/interrupt.h> |
| 136 | #include <linux/init.h> |
| 137 | #include <linux/bitops.h> |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 138 | #include <linux/stringify.h> |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 139 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | #include <asm/ecard.h> |
| 143 | |
| 144 | #include "../scsi.h" |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 145 | #include <scsi/scsi_dbg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | #include <scsi/scsi_host.h> |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 147 | #include <scsi/scsi_transport_spi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | #include "acornscsi.h" |
| 149 | #include "msgqueue.h" |
| 150 | #include "scsi.h" |
| 151 | |
| 152 | #include <scsi/scsicam.h> |
| 153 | |
| 154 | #define VER_MAJOR 2 |
| 155 | #define VER_MINOR 0 |
| 156 | #define VER_PATCH 6 |
| 157 | |
| 158 | #ifndef ABORT_TAG |
| 159 | #define ABORT_TAG 0xd |
| 160 | #else |
| 161 | #error "Yippee! ABORT TAG is now defined! Remove this error!" |
| 162 | #endif |
| 163 | |
| 164 | #ifdef CONFIG_SCSI_ACORNSCSI_LINK |
| 165 | #error SCSI2 LINKed commands not supported (yet)! |
| 166 | #endif |
| 167 | |
| 168 | #ifdef USE_DMAC |
| 169 | /* |
| 170 | * DMAC setup parameters |
| 171 | */ |
| 172 | #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) |
| 173 | #define INIT_DEVCON1 (DEVCON1_BHLD) |
| 174 | #define DMAC_READ (MODECON_READ) |
| 175 | #define DMAC_WRITE (MODECON_WRITE) |
| 176 | #define INIT_SBICDMA (CTRL_DMABURST) |
| 177 | |
| 178 | #define scsi_xferred have_data_in |
| 179 | |
| 180 | /* |
| 181 | * Size of on-board DMA buffer |
| 182 | */ |
| 183 | #define DMAC_BUFFER_SIZE 65536 |
| 184 | #endif |
| 185 | |
| 186 | #define STATUS_BUFFER_TO_PRINT 24 |
| 187 | |
| 188 | unsigned int sdtr_period = SDTR_PERIOD; |
| 189 | unsigned int sdtr_size = SDTR_SIZE; |
| 190 | |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 191 | static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, |
| 192 | unsigned int result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | static int acornscsi_reconnect_finish(AS_Host *host); |
| 194 | static void acornscsi_dma_cleanup(AS_Host *host); |
| 195 | static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); |
| 196 | |
| 197 | /* ==================================================================================== |
| 198 | * Miscellaneous |
| 199 | */ |
| 200 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 201 | /* Offsets from MEMC base */ |
| 202 | #define SBIC_REGIDX 0x2000 |
| 203 | #define SBIC_REGVAL 0x2004 |
| 204 | #define DMAC_OFFSET 0x3000 |
| 205 | |
| 206 | /* Offsets from FAST IOC base */ |
| 207 | #define INT_REG 0x2000 |
| 208 | #define PAGE_REG 0x3000 |
| 209 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 210 | static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 212 | writeb(reg, host->base + SBIC_REGIDX); |
| 213 | writeb(value, host->base + SBIC_REGVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 216 | static inline int sbic_arm_read(AS_Host *host, unsigned int reg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
| 218 | if(reg == SBIC_ASR) |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 219 | return readl(host->base + SBIC_REGIDX) & 255; |
| 220 | writeb(reg, host->base + SBIC_REGIDX); |
| 221 | return readl(host->base + SBIC_REGVAL) & 255; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 224 | #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL) |
| 225 | #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
| 227 | #ifdef USE_DMAC |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 228 | #define dmac_read(host,reg) \ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 229 | readb((host)->base + DMAC_OFFSET + ((reg) << 2)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 231 | #define dmac_write(host,reg,value) \ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 232 | ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 234 | #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 236 | static inline unsigned int dmac_address(AS_Host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 238 | return dmac_read(host, DMAC_TXADRHI) << 16 | |
| 239 | dmac_read(host, DMAC_TXADRMD) << 8 | |
| 240 | dmac_read(host, DMAC_TXADRLO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | static |
| 244 | void acornscsi_dumpdma(AS_Host *host, char *where) |
| 245 | { |
| 246 | unsigned int mode, addr, len; |
| 247 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 248 | mode = dmac_read(host, DMAC_MODECON); |
| 249 | addr = dmac_address(host); |
| 250 | len = dmac_read(host, DMAC_TXCNTHI) << 8 | |
| 251 | dmac_read(host, DMAC_TXCNTLO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
| 253 | printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", |
| 254 | host->host->host_no, where, |
| 255 | mode, addr, (len + 1) & 0xffff, |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 256 | dmac_read(host, DMAC_MASKREG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | printk("DMA @%06x, ", host->dma.start_addr); |
| 259 | printk("BH @%p +%04x, ", host->scsi.SCp.ptr, |
| 260 | host->scsi.SCp.this_residual); |
| 261 | printk("DT @+%04x ST @+%04x", host->dma.transferred, |
| 262 | host->scsi.SCp.scsi_xferred); |
| 263 | printk("\n"); |
| 264 | } |
| 265 | #endif |
| 266 | |
| 267 | static |
| 268 | unsigned long acornscsi_sbic_xfcount(AS_Host *host) |
| 269 | { |
| 270 | unsigned long length; |
| 271 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 272 | length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16; |
| 273 | length |= sbic_arm_readnext(host) << 8; |
| 274 | length |= sbic_arm_readnext(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
| 276 | return length; |
| 277 | } |
| 278 | |
| 279 | static int |
| 280 | acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) |
| 281 | { |
| 282 | int asr; |
| 283 | |
| 284 | do { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 285 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | if ((asr & stat_mask) == stat) |
| 288 | return 0; |
| 289 | |
| 290 | udelay(1); |
| 291 | } while (--timeout); |
| 292 | |
| 293 | printk("scsi%d: timeout while %s\n", host->host->host_no, msg); |
| 294 | |
| 295 | return -1; |
| 296 | } |
| 297 | |
| 298 | static |
| 299 | int acornscsi_sbic_issuecmd(AS_Host *host, int command) |
| 300 | { |
| 301 | if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) |
| 302 | return -1; |
| 303 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 304 | sbic_arm_write(host, SBIC_CMND, command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static void |
| 310 | acornscsi_csdelay(unsigned int cs) |
| 311 | { |
| 312 | unsigned long target_jiffies, flags; |
| 313 | |
| 314 | target_jiffies = jiffies + 1 + cs * HZ / 100; |
| 315 | |
| 316 | local_save_flags(flags); |
| 317 | local_irq_enable(); |
| 318 | |
| 319 | while (time_before(jiffies, target_jiffies)) barrier(); |
| 320 | |
| 321 | local_irq_restore(flags); |
| 322 | } |
| 323 | |
| 324 | static |
| 325 | void acornscsi_resetcard(AS_Host *host) |
| 326 | { |
| 327 | unsigned int i, timeout; |
| 328 | |
| 329 | /* assert reset line */ |
| 330 | host->card.page_reg = 0x80; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 331 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | /* wait 3 cs. SCSI standard says 25ms. */ |
| 334 | acornscsi_csdelay(3); |
| 335 | |
| 336 | host->card.page_reg = 0; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 337 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | /* |
| 340 | * Should get a reset from the card |
| 341 | */ |
| 342 | timeout = 1000; |
| 343 | do { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 344 | if (readb(host->fast + INT_REG) & 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | break; |
| 346 | udelay(1); |
| 347 | } while (--timeout); |
| 348 | |
| 349 | if (timeout == 0) |
| 350 | printk("scsi%d: timeout while resetting card\n", |
| 351 | host->host->host_no); |
| 352 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 353 | sbic_arm_read(host, SBIC_ASR); |
| 354 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | /* setup sbic - WD33C93A */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 357 | sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); |
| 358 | sbic_arm_write(host, SBIC_CMND, CMND_RESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | /* |
| 361 | * Command should cause a reset interrupt |
| 362 | */ |
| 363 | timeout = 1000; |
| 364 | do { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 365 | if (readb(host->fast + INT_REG) & 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | break; |
| 367 | udelay(1); |
| 368 | } while (--timeout); |
| 369 | |
| 370 | if (timeout == 0) |
| 371 | printk("scsi%d: timeout while resetting card\n", |
| 372 | host->host->host_no); |
| 373 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 374 | sbic_arm_read(host, SBIC_ASR); |
| 375 | if (sbic_arm_read(host, SBIC_SSR) != 0x01) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", |
| 377 | host->host->host_no); |
| 378 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 379 | sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); |
| 380 | sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); |
| 381 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); |
| 382 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
| 384 | host->card.page_reg = 0x40; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 385 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | /* setup dmac - uPC71071 */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 388 | dmac_write(host, DMAC_INIT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | #ifdef USE_DMAC |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 390 | dmac_write(host, DMAC_INIT, INIT_8BIT); |
| 391 | dmac_write(host, DMAC_CHANNEL, CHANNEL_0); |
| 392 | dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0); |
| 393 | dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #endif |
| 395 | |
| 396 | host->SCpnt = NULL; |
| 397 | host->scsi.phase = PHASE_IDLE; |
| 398 | host->scsi.disconnectable = 0; |
| 399 | |
| 400 | memset(host->busyluns, 0, sizeof(host->busyluns)); |
| 401 | |
| 402 | for (i = 0; i < 8; i++) { |
| 403 | host->device[i].sync_state = SYNC_NEGOCIATE; |
| 404 | host->device[i].disconnect_ok = 1; |
| 405 | } |
| 406 | |
| 407 | /* wait 25 cs. SCSI standard says 250ms. */ |
| 408 | acornscsi_csdelay(25); |
| 409 | } |
| 410 | |
| 411 | /*============================================================================================= |
| 412 | * Utility routines (eg. debug) |
| 413 | */ |
| 414 | #ifdef CONFIG_ACORNSCSI_CONSTANTS |
| 415 | static char *acornscsi_interrupttype[] = { |
| 416 | "rst", "suc", "p/a", "3", |
| 417 | "term", "5", "6", "7", |
| 418 | "serv", "9", "a", "b", |
| 419 | "c", "d", "e", "f" |
| 420 | }; |
| 421 | |
| 422 | static signed char acornscsi_map[] = { |
| 423 | 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 424 | -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 425 | 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 426 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 427 | 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, |
| 428 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 429 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 430 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 431 | 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 432 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 433 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 434 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 435 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 436 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 437 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 438 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 |
| 439 | }; |
| 440 | |
| 441 | static char *acornscsi_interruptcode[] = { |
| 442 | /* 0 */ |
| 443 | "reset - normal mode", /* 00 */ |
| 444 | "reset - advanced mode", /* 01 */ |
| 445 | |
| 446 | /* 2 */ |
| 447 | "sel", /* 11 */ |
| 448 | "sel+xfer", /* 16 */ |
| 449 | "data-out", /* 18 */ |
| 450 | "data-in", /* 19 */ |
| 451 | "cmd", /* 1A */ |
| 452 | "stat", /* 1B */ |
| 453 | "??-out", /* 1C */ |
| 454 | "??-in", /* 1D */ |
| 455 | "msg-out", /* 1E */ |
| 456 | "msg-in", /* 1F */ |
| 457 | |
| 458 | /* 12 */ |
| 459 | "/ACK asserted", /* 20 */ |
| 460 | "save-data-ptr", /* 21 */ |
| 461 | "{re}sel", /* 22 */ |
| 462 | |
| 463 | /* 15 */ |
| 464 | "inv cmd", /* 40 */ |
| 465 | "unexpected disconnect", /* 41 */ |
| 466 | "sel timeout", /* 42 */ |
| 467 | "P err", /* 43 */ |
| 468 | "P err+ATN", /* 44 */ |
| 469 | "bad status byte", /* 47 */ |
| 470 | |
| 471 | /* 21 */ |
| 472 | "resel, no id", /* 80 */ |
| 473 | "resel", /* 81 */ |
| 474 | "discon", /* 85 */ |
| 475 | }; |
| 476 | |
| 477 | static |
| 478 | void print_scsi_status(unsigned int ssr) |
| 479 | { |
| 480 | if (acornscsi_map[ssr] != -1) |
| 481 | printk("%s:%s", |
| 482 | acornscsi_interrupttype[(ssr >> 4)], |
| 483 | acornscsi_interruptcode[acornscsi_map[ssr]]); |
| 484 | else |
| 485 | printk("%X:%X", ssr >> 4, ssr & 0x0f); |
| 486 | } |
| 487 | #endif |
| 488 | |
| 489 | static |
| 490 | void print_sbic_status(int asr, int ssr, int cmdphase) |
| 491 | { |
| 492 | #ifdef CONFIG_ACORNSCSI_CONSTANTS |
| 493 | printk("sbic: %c%c%c%c%c%c ", |
| 494 | asr & ASR_INT ? 'I' : 'i', |
| 495 | asr & ASR_LCI ? 'L' : 'l', |
| 496 | asr & ASR_BSY ? 'B' : 'b', |
| 497 | asr & ASR_CIP ? 'C' : 'c', |
| 498 | asr & ASR_PE ? 'P' : 'p', |
| 499 | asr & ASR_DBR ? 'D' : 'd'); |
| 500 | printk("scsi: "); |
| 501 | print_scsi_status(ssr); |
| 502 | printk(" ph %02X\n", cmdphase); |
| 503 | #else |
| 504 | printk("sbic: %02X scsi: %X:%X ph: %02X\n", |
| 505 | asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); |
| 506 | #endif |
| 507 | } |
| 508 | |
| 509 | static void |
| 510 | acornscsi_dumplogline(AS_Host *host, int target, int line) |
| 511 | { |
| 512 | unsigned long prev; |
| 513 | signed int ptr; |
| 514 | |
| 515 | ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; |
| 516 | if (ptr < 0) |
| 517 | ptr += STATUS_BUFFER_SIZE; |
| 518 | |
| 519 | printk("%c: %3s:", target == 8 ? 'H' : '0' + target, |
| 520 | line == 0 ? "ph" : line == 1 ? "ssr" : "int"); |
| 521 | |
| 522 | prev = host->status[target][ptr].when; |
| 523 | |
| 524 | for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { |
| 525 | unsigned long time_diff; |
| 526 | |
| 527 | if (!host->status[target][ptr].when) |
| 528 | continue; |
| 529 | |
| 530 | switch (line) { |
| 531 | case 0: |
| 532 | printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', |
| 533 | host->status[target][ptr].ph); |
| 534 | break; |
| 535 | |
| 536 | case 1: |
| 537 | printk(" %02X", host->status[target][ptr].ssr); |
| 538 | break; |
| 539 | |
| 540 | case 2: |
| 541 | time_diff = host->status[target][ptr].when - prev; |
| 542 | prev = host->status[target][ptr].when; |
| 543 | if (time_diff == 0) |
| 544 | printk("==^"); |
| 545 | else if (time_diff >= 100) |
| 546 | printk(" "); |
| 547 | else |
| 548 | printk(" %02ld", time_diff); |
| 549 | break; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | printk("\n"); |
| 554 | } |
| 555 | |
| 556 | static |
| 557 | void acornscsi_dumplog(AS_Host *host, int target) |
| 558 | { |
| 559 | do { |
| 560 | acornscsi_dumplogline(host, target, 0); |
| 561 | acornscsi_dumplogline(host, target, 1); |
| 562 | acornscsi_dumplogline(host, target, 2); |
| 563 | |
| 564 | if (target == 8) |
| 565 | break; |
| 566 | |
| 567 | target = 8; |
| 568 | } while (1); |
| 569 | } |
| 570 | |
| 571 | static |
| 572 | char acornscsi_target(AS_Host *host) |
| 573 | { |
| 574 | if (host->SCpnt) |
| 575 | return '0' + host->SCpnt->device->id; |
| 576 | return 'H'; |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Prototype: cmdtype_t acornscsi_cmdtype(int command) |
| 581 | * Purpose : differentiate READ from WRITE from other commands |
| 582 | * Params : command - command to interpret |
| 583 | * Returns : CMD_READ - command reads data, |
| 584 | * CMD_WRITE - command writes data, |
| 585 | * CMD_MISC - everything else |
| 586 | */ |
| 587 | static inline |
| 588 | cmdtype_t acornscsi_cmdtype(int command) |
| 589 | { |
| 590 | switch (command) { |
| 591 | case WRITE_6: case WRITE_10: case WRITE_12: |
| 592 | return CMD_WRITE; |
| 593 | case READ_6: case READ_10: case READ_12: |
| 594 | return CMD_READ; |
| 595 | default: |
| 596 | return CMD_MISC; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * Prototype: int acornscsi_datadirection(int command) |
| 602 | * Purpose : differentiate between commands that have a DATA IN phase |
| 603 | * and a DATA OUT phase |
| 604 | * Params : command - command to interpret |
| 605 | * Returns : DATADIR_OUT - data out phase expected |
| 606 | * DATADIR_IN - data in phase expected |
| 607 | */ |
| 608 | static |
| 609 | datadir_t acornscsi_datadirection(int command) |
| 610 | { |
| 611 | switch (command) { |
| 612 | case CHANGE_DEFINITION: case COMPARE: case COPY: |
| 613 | case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: |
| 614 | case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: |
| 615 | case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: |
| 616 | case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: |
| 617 | case WRITE_6: case WRITE_10: case WRITE_VERIFY: |
| 618 | case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: |
| 619 | case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: |
| 620 | case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: |
| 621 | case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: |
| 622 | return DATADIR_OUT; |
| 623 | default: |
| 624 | return DATADIR_IN; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * Purpose : provide values for synchronous transfers with 33C93. |
| 630 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 631 | * Modified by Russell King for 8MHz WD33C93A |
| 632 | */ |
| 633 | static struct sync_xfer_tbl { |
| 634 | unsigned int period_ns; |
| 635 | unsigned char reg_value; |
| 636 | } sync_xfer_table[] = { |
| 637 | { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, |
| 638 | { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, |
| 639 | { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } |
| 640 | }; |
| 641 | |
| 642 | /* |
| 643 | * Prototype: int acornscsi_getperiod(unsigned char syncxfer) |
| 644 | * Purpose : period for the synchronous transfer setting |
| 645 | * Params : syncxfer SYNCXFER register value |
| 646 | * Returns : period in ns. |
| 647 | */ |
| 648 | static |
| 649 | int acornscsi_getperiod(unsigned char syncxfer) |
| 650 | { |
| 651 | int i; |
| 652 | |
| 653 | syncxfer &= 0xf0; |
| 654 | if (syncxfer == 0x10) |
| 655 | syncxfer = 0; |
| 656 | |
| 657 | for (i = 1; sync_xfer_table[i].period_ns; i++) |
| 658 | if (syncxfer == sync_xfer_table[i].reg_value) |
| 659 | return sync_xfer_table[i].period_ns; |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | /* |
| 664 | * Prototype: int round_period(unsigned int period) |
| 665 | * Purpose : return index into above table for a required REQ period |
| 666 | * Params : period - time (ns) for REQ |
| 667 | * Returns : table index |
| 668 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 669 | */ |
| 670 | static inline |
| 671 | int round_period(unsigned int period) |
| 672 | { |
| 673 | int i; |
| 674 | |
| 675 | for (i = 1; sync_xfer_table[i].period_ns; i++) { |
| 676 | if ((period <= sync_xfer_table[i].period_ns) && |
| 677 | (period > sync_xfer_table[i - 1].period_ns)) |
| 678 | return i; |
| 679 | } |
| 680 | return 7; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) |
| 685 | * Purpose : calculate value for 33c93s SYNC register |
| 686 | * Params : period - time (ns) for REQ |
| 687 | * offset - offset in bytes between REQ/ACK |
| 688 | * Returns : value for SYNC register |
| 689 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 690 | */ |
| 691 | static |
| 692 | unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) |
| 693 | { |
| 694 | return sync_xfer_table[round_period(period)].reg_value | |
| 695 | ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); |
| 696 | } |
| 697 | |
| 698 | /* ==================================================================================== |
| 699 | * Command functions |
| 700 | */ |
| 701 | /* |
| 702 | * Function: acornscsi_kick(AS_Host *host) |
| 703 | * Purpose : kick next command to interface |
| 704 | * Params : host - host to send command to |
| 705 | * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING |
| 706 | * Notes : interrupts are always disabled! |
| 707 | */ |
| 708 | static |
| 709 | intr_ret_t acornscsi_kick(AS_Host *host) |
| 710 | { |
| 711 | int from_queue = 0; |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 712 | struct scsi_cmnd *SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | /* first check to see if a command is waiting to be executed */ |
| 715 | SCpnt = host->origSCpnt; |
| 716 | host->origSCpnt = NULL; |
| 717 | |
| 718 | /* retrieve next command */ |
| 719 | if (!SCpnt) { |
| 720 | SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); |
| 721 | if (!SCpnt) |
| 722 | return INTR_IDLE; |
| 723 | |
| 724 | from_queue = 1; |
| 725 | } |
| 726 | |
| 727 | if (host->scsi.disconnectable && host->SCpnt) { |
| 728 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 729 | host->scsi.disconnectable = 0; |
| 730 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 731 | DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", |
| 732 | host->host->host_no, acornscsi_target(host))); |
| 733 | #endif |
| 734 | host->SCpnt = NULL; |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * If we have an interrupt pending, then we may have been reselected. |
| 739 | * In this case, we don't want to write to the registers |
| 740 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 741 | if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { |
| 742 | sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id); |
| 743 | sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | /* |
| 747 | * claim host busy - all of these must happen atomically wrt |
| 748 | * our interrupt routine. Failure means command loss. |
| 749 | */ |
| 750 | host->scsi.phase = PHASE_CONNECTING; |
| 751 | host->SCpnt = SCpnt; |
| 752 | host->scsi.SCp = SCpnt->SCp; |
| 753 | host->dma.xfer_setup = 0; |
| 754 | host->dma.xfer_required = 0; |
| 755 | host->dma.xfer_done = 0; |
| 756 | |
| 757 | #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) |
| 758 | DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", |
| 759 | host->host->host_no, '0' + SCpnt->device->id, |
| 760 | SCpnt->cmnd[0])); |
| 761 | #endif |
| 762 | |
| 763 | if (from_queue) { |
| 764 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 765 | /* |
| 766 | * tagged queueing - allocate a new tag to this command |
| 767 | */ |
| 768 | if (SCpnt->device->simple_tags) { |
| 769 | SCpnt->device->current_tag += 1; |
| 770 | if (SCpnt->device->current_tag == 0) |
| 771 | SCpnt->device->current_tag = 1; |
| 772 | SCpnt->tag = SCpnt->device->current_tag; |
| 773 | } else |
| 774 | #endif |
| 775 | set_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); |
| 776 | |
| 777 | host->stats.removes += 1; |
| 778 | |
| 779 | switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { |
| 780 | case CMD_WRITE: |
| 781 | host->stats.writes += 1; |
| 782 | break; |
| 783 | case CMD_READ: |
| 784 | host->stats.reads += 1; |
| 785 | break; |
| 786 | case CMD_MISC: |
| 787 | host->stats.miscs += 1; |
| 788 | break; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | return INTR_PROCESSING; |
| 793 | } |
| 794 | |
| 795 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 796 | * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | * Purpose : complete processing for command |
| 798 | * Params : host - interface that completed |
| 799 | * result - driver byte of result |
| 800 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 801 | static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, |
| 802 | unsigned int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 804 | struct scsi_cmnd *SCpnt = *SCpntp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
| 806 | /* clean up */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 807 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | |
| 809 | host->stats.fins += 1; |
| 810 | |
| 811 | if (SCpnt) { |
| 812 | *SCpntp = NULL; |
| 813 | |
| 814 | acornscsi_dma_cleanup(host); |
| 815 | |
| 816 | SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; |
| 817 | |
| 818 | /* |
| 819 | * In theory, this should not happen. In practice, it seems to. |
| 820 | * Only trigger an error if the device attempts to report all happy |
| 821 | * but with untransferred buffers... If we don't do something, then |
| 822 | * data loss will occur. Should we check SCpnt->underflow here? |
| 823 | * It doesn't appear to be set to something meaningful by the higher |
| 824 | * levels all the time. |
| 825 | */ |
| 826 | if (result == DID_OK) { |
| 827 | int xfer_warn = 0; |
| 828 | |
| 829 | if (SCpnt->underflow == 0) { |
| 830 | if (host->scsi.SCp.ptr && |
| 831 | acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) |
| 832 | xfer_warn = 1; |
| 833 | } else { |
| 834 | if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || |
| 835 | host->scsi.SCp.scsi_xferred != host->dma.transferred) |
| 836 | xfer_warn = 1; |
| 837 | } |
| 838 | |
| 839 | /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) |
| 840 | * Targets which break data transfers into multiple |
| 841 | * connections shall end each successful connection |
| 842 | * (except possibly the last) with a SAVE DATA |
| 843 | * POINTER - DISCONNECT message sequence. |
| 844 | * |
| 845 | * This makes it difficult to ensure that a transfer has |
| 846 | * completed. If we reach the end of a transfer during |
| 847 | * the command, then we can only have finished the transfer. |
| 848 | * therefore, if we seem to have some data remaining, this |
| 849 | * is not a problem. |
| 850 | */ |
| 851 | if (host->dma.xfer_done) |
| 852 | xfer_warn = 0; |
| 853 | |
| 854 | if (xfer_warn) { |
| 855 | switch (status_byte(SCpnt->result)) { |
| 856 | case CHECK_CONDITION: |
| 857 | case COMMAND_TERMINATED: |
| 858 | case BUSY: |
| 859 | case QUEUE_FULL: |
| 860 | case RESERVATION_CONFLICT: |
| 861 | break; |
| 862 | |
| 863 | default: |
| 864 | printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=", |
| 865 | host->host->host_no, SCpnt->result); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 866 | __scsi_print_command(SCpnt->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | acornscsi_dumpdma(host, "done"); |
| 868 | acornscsi_dumplog(host, SCpnt->device->id); |
| 869 | SCpnt->result &= 0xffff; |
| 870 | SCpnt->result |= DID_ERROR << 16; |
| 871 | } |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | if (!SCpnt->scsi_done) |
| 876 | panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); |
| 877 | |
| 878 | clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); |
| 879 | |
| 880 | SCpnt->scsi_done(SCpnt); |
| 881 | } else |
| 882 | printk("scsi%d: null command in acornscsi_done", host->host->host_no); |
| 883 | |
| 884 | host->scsi.phase = PHASE_IDLE; |
| 885 | } |
| 886 | |
| 887 | /* ==================================================================================== |
| 888 | * DMA routines |
| 889 | */ |
| 890 | /* |
| 891 | * Purpose : update SCSI Data Pointer |
| 892 | * Notes : this will only be one SG entry or less |
| 893 | */ |
| 894 | static |
Christoph Hellwig | 0a04137 | 2005-10-31 18:31:56 +0100 | [diff] [blame] | 895 | void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
| 897 | SCp->ptr += length; |
| 898 | SCp->this_residual -= length; |
| 899 | |
| 900 | if (SCp->this_residual == 0 && next_SCp(SCp) == 0) |
| 901 | host->dma.xfer_done = 1; |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, |
| 906 | * unsigned int start_addr, unsigned int length) |
| 907 | * Purpose : read data from DMA RAM |
| 908 | * Params : host - host to transfer from |
| 909 | * ptr - DRAM address |
| 910 | * start_addr - host mem address |
| 911 | * length - number of bytes to transfer |
| 912 | * Notes : this will only be one SG entry or less |
| 913 | */ |
| 914 | static |
| 915 | void acornscsi_data_read(AS_Host *host, char *ptr, |
| 916 | unsigned int start_addr, unsigned int length) |
| 917 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 918 | extern void __acornscsi_in(void __iomem *, char *buf, int len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | unsigned int page, offset, len = length; |
| 920 | |
| 921 | page = (start_addr >> 12); |
| 922 | offset = start_addr & ((1 << 12) - 1); |
| 923 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 924 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | while (len > 0) { |
| 927 | unsigned int this_len; |
| 928 | |
| 929 | if (len + offset > (1 << 12)) |
| 930 | this_len = (1 << 12) - offset; |
| 931 | else |
| 932 | this_len = len; |
| 933 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 934 | __acornscsi_in(host->base + (offset << 1), ptr, this_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | offset += this_len; |
| 937 | ptr += this_len; |
| 938 | len -= this_len; |
| 939 | |
| 940 | if (offset == (1 << 12)) { |
| 941 | offset = 0; |
| 942 | page ++; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 943 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | } |
| 945 | } |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 946 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | /* |
| 950 | * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, |
| 951 | * unsigned int start_addr, unsigned int length) |
| 952 | * Purpose : write data to DMA RAM |
| 953 | * Params : host - host to transfer from |
| 954 | * ptr - DRAM address |
| 955 | * start_addr - host mem address |
| 956 | * length - number of bytes to transfer |
| 957 | * Notes : this will only be one SG entry or less |
| 958 | */ |
| 959 | static |
| 960 | void acornscsi_data_write(AS_Host *host, char *ptr, |
| 961 | unsigned int start_addr, unsigned int length) |
| 962 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 963 | extern void __acornscsi_out(void __iomem *, char *buf, int len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | unsigned int page, offset, len = length; |
| 965 | |
| 966 | page = (start_addr >> 12); |
| 967 | offset = start_addr & ((1 << 12) - 1); |
| 968 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 969 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
| 971 | while (len > 0) { |
| 972 | unsigned int this_len; |
| 973 | |
| 974 | if (len + offset > (1 << 12)) |
| 975 | this_len = (1 << 12) - offset; |
| 976 | else |
| 977 | this_len = len; |
| 978 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 979 | __acornscsi_out(host->base + (offset << 1), ptr, this_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | offset += this_len; |
| 982 | ptr += this_len; |
| 983 | len -= this_len; |
| 984 | |
| 985 | if (offset == (1 << 12)) { |
| 986 | offset = 0; |
| 987 | page ++; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 988 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | } |
| 990 | } |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 991 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | /* ========================================================================================= |
| 995 | * On-board DMA routines |
| 996 | */ |
| 997 | #ifdef USE_DMAC |
| 998 | /* |
| 999 | * Prototype: void acornscsi_dmastop(AS_Host *host) |
| 1000 | * Purpose : stop all DMA |
| 1001 | * Params : host - host on which to stop DMA |
| 1002 | * Notes : This is called when leaving DATA IN/OUT phase, |
| 1003 | * or when interface is RESET |
| 1004 | */ |
| 1005 | static inline |
| 1006 | void acornscsi_dma_stop(AS_Host *host) |
| 1007 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1008 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 1009 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
| 1011 | #if (DEBUG & DEBUG_DMA) |
| 1012 | DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); |
| 1013 | #endif |
| 1014 | } |
| 1015 | |
| 1016 | /* |
| 1017 | * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) |
| 1018 | * Purpose : setup DMA controller for data transfer |
| 1019 | * Params : host - host to setup |
| 1020 | * direction - data transfer direction |
| 1021 | * Notes : This is called when entering DATA I/O phase, not |
| 1022 | * while we're in a DATA I/O phase |
| 1023 | */ |
| 1024 | static |
| 1025 | void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) |
| 1026 | { |
| 1027 | unsigned int address, length, mode; |
| 1028 | |
| 1029 | host->dma.direction = direction; |
| 1030 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1031 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
| 1033 | if (direction == DMA_OUT) { |
| 1034 | #if (DEBUG & DEBUG_NO_WRITE) |
| 1035 | if (NO_WRITE & (1 << host->SCpnt->device->id)) { |
| 1036 | printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", |
| 1037 | host->host->host_no, acornscsi_target(host)); |
| 1038 | return; |
| 1039 | } |
| 1040 | #endif |
| 1041 | mode = DMAC_WRITE; |
| 1042 | } else |
| 1043 | mode = DMAC_READ; |
| 1044 | |
| 1045 | /* |
| 1046 | * Allocate some buffer space, limited to half the buffer size |
| 1047 | */ |
| 1048 | length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); |
| 1049 | if (length) { |
| 1050 | host->dma.start_addr = address = host->dma.free_addr; |
| 1051 | host->dma.free_addr = (host->dma.free_addr + length) & |
| 1052 | (DMAC_BUFFER_SIZE - 1); |
| 1053 | |
| 1054 | /* |
| 1055 | * Transfer data to DMA memory |
| 1056 | */ |
| 1057 | if (direction == DMA_OUT) |
| 1058 | acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, |
| 1059 | length); |
| 1060 | |
| 1061 | length -= 1; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1062 | dmac_write(host, DMAC_TXCNTLO, length); |
| 1063 | dmac_write(host, DMAC_TXCNTHI, length >> 8); |
| 1064 | dmac_write(host, DMAC_TXADRLO, address); |
| 1065 | dmac_write(host, DMAC_TXADRMD, address >> 8); |
| 1066 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1067 | dmac_write(host, DMAC_MODECON, mode); |
| 1068 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
| 1070 | #if (DEBUG & DEBUG_DMA) |
| 1071 | DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); |
| 1072 | #endif |
| 1073 | host->dma.xfer_setup = 1; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | /* |
| 1078 | * Function: void acornscsi_dma_cleanup(AS_Host *host) |
| 1079 | * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct |
| 1080 | * Params : host - host to finish |
| 1081 | * Notes : This is called when a command is: |
| 1082 | * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT |
| 1083 | * : This must not return until all transfers are completed. |
| 1084 | */ |
| 1085 | static |
| 1086 | void acornscsi_dma_cleanup(AS_Host *host) |
| 1087 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1088 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 1089 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
| 1091 | /* |
| 1092 | * Check for a pending transfer |
| 1093 | */ |
| 1094 | if (host->dma.xfer_required) { |
| 1095 | host->dma.xfer_required = 0; |
| 1096 | if (host->dma.direction == DMA_IN) |
| 1097 | acornscsi_data_read(host, host->dma.xfer_ptr, |
| 1098 | host->dma.xfer_start, host->dma.xfer_length); |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * Has a transfer been setup? |
| 1103 | */ |
| 1104 | if (host->dma.xfer_setup) { |
| 1105 | unsigned int transferred; |
| 1106 | |
| 1107 | host->dma.xfer_setup = 0; |
| 1108 | |
| 1109 | #if (DEBUG & DEBUG_DMA) |
| 1110 | DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); |
| 1111 | #endif |
| 1112 | |
| 1113 | /* |
| 1114 | * Calculate number of bytes transferred from DMA. |
| 1115 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1116 | transferred = dmac_address(host) - host->dma.start_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | host->dma.transferred += transferred; |
| 1118 | |
| 1119 | if (host->dma.direction == DMA_IN) |
| 1120 | acornscsi_data_read(host, host->scsi.SCp.ptr, |
| 1121 | host->dma.start_addr, transferred); |
| 1122 | |
| 1123 | /* |
| 1124 | * Update SCSI pointers |
| 1125 | */ |
| 1126 | acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); |
| 1127 | #if (DEBUG & DEBUG_DMA) |
| 1128 | DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); |
| 1129 | #endif |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Function: void acornscsi_dmacintr(AS_Host *host) |
| 1135 | * Purpose : handle interrupts from DMAC device |
| 1136 | * Params : host - host to process |
| 1137 | * Notes : If reading, we schedule the read to main memory & |
| 1138 | * allow the transfer to continue. |
| 1139 | * : If writing, we fill the onboard DMA memory from main |
| 1140 | * memory. |
| 1141 | * : Called whenever DMAC finished it's current transfer. |
| 1142 | */ |
| 1143 | static |
| 1144 | void acornscsi_dma_intr(AS_Host *host) |
| 1145 | { |
| 1146 | unsigned int address, length, transferred; |
| 1147 | |
| 1148 | #if (DEBUG & DEBUG_DMA) |
| 1149 | DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); |
| 1150 | #endif |
| 1151 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1152 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 1153 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
| 1155 | /* |
| 1156 | * Calculate amount transferred via DMA |
| 1157 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1158 | transferred = dmac_address(host) - host->dma.start_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | host->dma.transferred += transferred; |
| 1160 | |
| 1161 | /* |
| 1162 | * Schedule DMA transfer off board |
| 1163 | */ |
| 1164 | if (host->dma.direction == DMA_IN) { |
| 1165 | host->dma.xfer_start = host->dma.start_addr; |
| 1166 | host->dma.xfer_length = transferred; |
| 1167 | host->dma.xfer_ptr = host->scsi.SCp.ptr; |
| 1168 | host->dma.xfer_required = 1; |
| 1169 | } |
| 1170 | |
| 1171 | acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); |
| 1172 | |
| 1173 | /* |
| 1174 | * Allocate some buffer space, limited to half the on-board RAM size |
| 1175 | */ |
| 1176 | length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); |
| 1177 | if (length) { |
| 1178 | host->dma.start_addr = address = host->dma.free_addr; |
| 1179 | host->dma.free_addr = (host->dma.free_addr + length) & |
| 1180 | (DMAC_BUFFER_SIZE - 1); |
| 1181 | |
| 1182 | /* |
| 1183 | * Transfer data to DMA memory |
| 1184 | */ |
| 1185 | if (host->dma.direction == DMA_OUT) |
| 1186 | acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, |
| 1187 | length); |
| 1188 | |
| 1189 | length -= 1; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1190 | dmac_write(host, DMAC_TXCNTLO, length); |
| 1191 | dmac_write(host, DMAC_TXCNTHI, length >> 8); |
| 1192 | dmac_write(host, DMAC_TXADRLO, address); |
| 1193 | dmac_write(host, DMAC_TXADRMD, address >> 8); |
| 1194 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1195 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | |
| 1197 | #if (DEBUG & DEBUG_DMA) |
| 1198 | DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); |
| 1199 | #endif |
| 1200 | } else { |
| 1201 | host->dma.xfer_setup = 0; |
| 1202 | #if 0 |
| 1203 | /* |
| 1204 | * If the interface still wants more, then this is an error. |
| 1205 | * We give it another byte, but we also attempt to raise an |
| 1206 | * attention condition. We continue giving one byte until |
| 1207 | * the device recognises the attention. |
| 1208 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1209 | if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 1211 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1212 | dmac_write(host, DMAC_TXCNTLO, 0); |
| 1213 | dmac_write(host, DMAC_TXCNTHI, 0); |
| 1214 | dmac_write(host, DMAC_TXADRLO, 0); |
| 1215 | dmac_write(host, DMAC_TXADRMD, 0); |
| 1216 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1217 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | } |
| 1219 | #endif |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | /* |
| 1224 | * Function: void acornscsi_dma_xfer(AS_Host *host) |
| 1225 | * Purpose : transfer data between AcornSCSI and memory |
| 1226 | * Params : host - host to process |
| 1227 | */ |
| 1228 | static |
| 1229 | void acornscsi_dma_xfer(AS_Host *host) |
| 1230 | { |
| 1231 | host->dma.xfer_required = 0; |
| 1232 | |
| 1233 | if (host->dma.direction == DMA_IN) |
| 1234 | acornscsi_data_read(host, host->dma.xfer_ptr, |
| 1235 | host->dma.xfer_start, host->dma.xfer_length); |
| 1236 | } |
| 1237 | |
| 1238 | /* |
| 1239 | * Function: void acornscsi_dma_adjust(AS_Host *host) |
| 1240 | * Purpose : adjust DMA pointers & count for bytes transferred to |
| 1241 | * SBIC but not SCSI bus. |
| 1242 | * Params : host - host to adjust DMA count for |
| 1243 | */ |
| 1244 | static |
| 1245 | void acornscsi_dma_adjust(AS_Host *host) |
| 1246 | { |
| 1247 | if (host->dma.xfer_setup) { |
| 1248 | signed long transferred; |
| 1249 | #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) |
| 1250 | DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); |
| 1251 | #endif |
| 1252 | /* |
| 1253 | * Calculate correct DMA address - DMA is ahead of SCSI bus while |
| 1254 | * writing. |
| 1255 | * host->scsi.SCp.scsi_xferred is the number of bytes |
| 1256 | * actually transferred to/from the SCSI bus. |
| 1257 | * host->dma.transferred is the number of bytes transferred |
| 1258 | * over DMA since host->dma.start_addr was last set. |
| 1259 | * |
| 1260 | * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred |
| 1261 | * - host->dma.transferred |
| 1262 | */ |
| 1263 | transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; |
| 1264 | if (transferred < 0) |
| 1265 | printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", |
| 1266 | host->host->host_no, acornscsi_target(host), transferred); |
| 1267 | else if (transferred == 0) |
| 1268 | host->dma.xfer_setup = 0; |
| 1269 | else { |
| 1270 | transferred += host->dma.start_addr; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1271 | dmac_write(host, DMAC_TXADRLO, transferred); |
| 1272 | dmac_write(host, DMAC_TXADRMD, transferred >> 8); |
| 1273 | dmac_write(host, DMAC_TXADRHI, transferred >> 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) |
| 1275 | DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); |
| 1276 | #endif |
| 1277 | } |
| 1278 | } |
| 1279 | } |
| 1280 | #endif |
| 1281 | |
| 1282 | /* ========================================================================================= |
| 1283 | * Data I/O |
| 1284 | */ |
| 1285 | static int |
| 1286 | acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) |
| 1287 | { |
| 1288 | unsigned int asr, timeout = max_timeout; |
| 1289 | int my_ptr = *ptr; |
| 1290 | |
| 1291 | while (my_ptr < len) { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1292 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | |
| 1294 | if (asr & ASR_DBR) { |
| 1295 | timeout = max_timeout; |
| 1296 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1297 | sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | } else if (asr & ASR_INT) |
| 1299 | break; |
| 1300 | else if (--timeout == 0) |
| 1301 | break; |
| 1302 | udelay(1); |
| 1303 | } |
| 1304 | |
| 1305 | *ptr = my_ptr; |
| 1306 | |
| 1307 | return (timeout == 0) ? -1 : 0; |
| 1308 | } |
| 1309 | |
| 1310 | /* |
| 1311 | * Function: void acornscsi_sendcommand(AS_Host *host) |
| 1312 | * Purpose : send a command to a target |
| 1313 | * Params : host - host which is connected to target |
| 1314 | */ |
| 1315 | static void |
| 1316 | acornscsi_sendcommand(AS_Host *host) |
| 1317 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 1318 | struct scsi_cmnd *SCpnt = host->SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1320 | sbic_arm_write(host, SBIC_TRANSCNTH, 0); |
| 1321 | sbic_arm_writenext(host, 0); |
| 1322 | sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
| 1324 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1325 | |
| 1326 | if (acornscsi_write_pio(host, SCpnt->cmnd, |
| 1327 | (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) |
| 1328 | printk("scsi%d: timeout while sending command\n", host->host->host_no); |
| 1329 | |
| 1330 | host->scsi.phase = PHASE_COMMAND; |
| 1331 | } |
| 1332 | |
| 1333 | static |
| 1334 | void acornscsi_sendmessage(AS_Host *host) |
| 1335 | { |
| 1336 | unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); |
| 1337 | unsigned int msgnr; |
| 1338 | struct message *msg; |
| 1339 | |
| 1340 | #if (DEBUG & DEBUG_MESSAGES) |
| 1341 | printk("scsi%d.%c: sending message ", |
| 1342 | host->host->host_no, acornscsi_target(host)); |
| 1343 | #endif |
| 1344 | |
| 1345 | switch (message_length) { |
| 1346 | case 0: |
| 1347 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1348 | |
| 1349 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); |
| 1350 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1351 | sbic_arm_write(host, SBIC_DATA, NOP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
| 1353 | host->scsi.last_message = NOP; |
| 1354 | #if (DEBUG & DEBUG_MESSAGES) |
| 1355 | printk("NOP"); |
| 1356 | #endif |
| 1357 | break; |
| 1358 | |
| 1359 | case 1: |
| 1360 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1361 | msg = msgqueue_getmsg(&host->scsi.msgs, 0); |
| 1362 | |
| 1363 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); |
| 1364 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1365 | sbic_arm_write(host, SBIC_DATA, msg->msg[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | |
| 1367 | host->scsi.last_message = msg->msg[0]; |
| 1368 | #if (DEBUG & DEBUG_MESSAGES) |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1369 | spi_print_msg(msg->msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | #endif |
| 1371 | break; |
| 1372 | |
| 1373 | default: |
| 1374 | /* |
| 1375 | * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) |
| 1376 | * 'When a target sends this (MESSAGE_REJECT) message, it |
| 1377 | * shall change to MESSAGE IN phase and send this message |
| 1378 | * prior to requesting additional message bytes from the |
| 1379 | * initiator. This provides an interlock so that the |
| 1380 | * initiator can determine which message byte is rejected. |
| 1381 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1382 | sbic_arm_write(host, SBIC_TRANSCNTH, 0); |
| 1383 | sbic_arm_writenext(host, 0); |
| 1384 | sbic_arm_writenext(host, message_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1386 | |
| 1387 | msgnr = 0; |
| 1388 | while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { |
| 1389 | unsigned int i; |
| 1390 | #if (DEBUG & DEBUG_MESSAGES) |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1391 | spi_print_msg(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | #endif |
| 1393 | i = 0; |
| 1394 | if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) |
| 1395 | printk("scsi%d: timeout while sending message\n", host->host->host_no); |
| 1396 | |
| 1397 | host->scsi.last_message = msg->msg[0]; |
| 1398 | if (msg->msg[0] == EXTENDED_MESSAGE) |
| 1399 | host->scsi.last_message |= msg->msg[2] << 8; |
| 1400 | |
| 1401 | if (i != msg->length) |
| 1402 | break; |
| 1403 | } |
| 1404 | break; |
| 1405 | } |
| 1406 | #if (DEBUG & DEBUG_MESSAGES) |
| 1407 | printk("\n"); |
| 1408 | #endif |
| 1409 | } |
| 1410 | |
| 1411 | /* |
| 1412 | * Function: void acornscsi_readstatusbyte(AS_Host *host) |
| 1413 | * Purpose : Read status byte from connected target |
| 1414 | * Params : host - host connected to target |
| 1415 | */ |
| 1416 | static |
| 1417 | void acornscsi_readstatusbyte(AS_Host *host) |
| 1418 | { |
| 1419 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); |
| 1420 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1421 | host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | } |
| 1423 | |
| 1424 | /* |
| 1425 | * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) |
| 1426 | * Purpose : Read one message byte from connected target |
| 1427 | * Params : host - host connected to target |
| 1428 | */ |
| 1429 | static |
| 1430 | unsigned char acornscsi_readmessagebyte(AS_Host *host) |
| 1431 | { |
| 1432 | unsigned char message; |
| 1433 | |
| 1434 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1435 | |
| 1436 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); |
| 1437 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1438 | message = sbic_arm_read(host, SBIC_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
| 1440 | /* wait for MSGIN-XFER-PAUSED */ |
| 1441 | acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); |
| 1442 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1443 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | |
| 1445 | return message; |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * Function: void acornscsi_message(AS_Host *host) |
| 1450 | * Purpose : Read complete message from connected target & action message |
| 1451 | * Params : host - host connected to target |
| 1452 | */ |
| 1453 | static |
| 1454 | void acornscsi_message(AS_Host *host) |
| 1455 | { |
| 1456 | unsigned char message[16]; |
| 1457 | unsigned int msgidx = 0, msglen = 1; |
| 1458 | |
| 1459 | do { |
| 1460 | message[msgidx] = acornscsi_readmessagebyte(host); |
| 1461 | |
| 1462 | switch (msgidx) { |
| 1463 | case 0: |
| 1464 | if (message[0] == EXTENDED_MESSAGE || |
| 1465 | (message[0] >= 0x20 && message[0] <= 0x2f)) |
| 1466 | msglen = 2; |
| 1467 | break; |
| 1468 | |
| 1469 | case 1: |
| 1470 | if (message[0] == EXTENDED_MESSAGE) |
| 1471 | msglen += message[msgidx]; |
| 1472 | break; |
| 1473 | } |
| 1474 | msgidx += 1; |
| 1475 | if (msgidx < msglen) { |
| 1476 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1477 | |
| 1478 | /* wait for next msg-in */ |
| 1479 | acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack"); |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1480 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | } |
| 1482 | } while (msgidx < msglen); |
| 1483 | |
| 1484 | #if (DEBUG & DEBUG_MESSAGES) |
| 1485 | printk("scsi%d.%c: message in: ", |
| 1486 | host->host->host_no, acornscsi_target(host)); |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1487 | spi_print_msg(message); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | printk("\n"); |
| 1489 | #endif |
| 1490 | |
| 1491 | if (host->scsi.phase == PHASE_RECONNECTED) { |
| 1492 | /* |
| 1493 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) |
| 1494 | * 'Whenever a target reconnects to an initiator to continue |
| 1495 | * a tagged I/O process, the SIMPLE QUEUE TAG message shall |
| 1496 | * be sent immediately following the IDENTIFY message...' |
| 1497 | */ |
| 1498 | if (message[0] == SIMPLE_QUEUE_TAG) |
| 1499 | host->scsi.reconnected.tag = message[1]; |
| 1500 | if (acornscsi_reconnect_finish(host)) |
| 1501 | host->scsi.phase = PHASE_MSGIN; |
| 1502 | } |
| 1503 | |
| 1504 | switch (message[0]) { |
| 1505 | case ABORT: |
| 1506 | case ABORT_TAG: |
| 1507 | case COMMAND_COMPLETE: |
| 1508 | if (host->scsi.phase != PHASE_STATUSIN) { |
| 1509 | printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", |
| 1510 | host->host->host_no, acornscsi_target(host)); |
| 1511 | acornscsi_dumplog(host, host->SCpnt->device->id); |
| 1512 | } |
| 1513 | host->scsi.phase = PHASE_DONE; |
| 1514 | host->scsi.SCp.Message = message[0]; |
| 1515 | break; |
| 1516 | |
| 1517 | case SAVE_POINTERS: |
| 1518 | /* |
| 1519 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) |
| 1520 | * 'The SAVE DATA POINTER message is sent from a target to |
| 1521 | * direct the initiator to copy the active data pointer to |
| 1522 | * the saved data pointer for the current I/O process. |
| 1523 | */ |
| 1524 | acornscsi_dma_cleanup(host); |
| 1525 | host->SCpnt->SCp = host->scsi.SCp; |
| 1526 | host->SCpnt->SCp.sent_command = 0; |
| 1527 | host->scsi.phase = PHASE_MSGIN; |
| 1528 | break; |
| 1529 | |
| 1530 | case RESTORE_POINTERS: |
| 1531 | /* |
| 1532 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) |
| 1533 | * 'The RESTORE POINTERS message is sent from a target to |
| 1534 | * direct the initiator to copy the most recently saved |
| 1535 | * command, data, and status pointers for the I/O process |
| 1536 | * to the corresponding active pointers. The command and |
| 1537 | * status pointers shall be restored to the beginning of |
| 1538 | * the present command and status areas.' |
| 1539 | */ |
| 1540 | acornscsi_dma_cleanup(host); |
| 1541 | host->scsi.SCp = host->SCpnt->SCp; |
| 1542 | host->scsi.phase = PHASE_MSGIN; |
| 1543 | break; |
| 1544 | |
| 1545 | case DISCONNECT: |
| 1546 | /* |
| 1547 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) |
| 1548 | * 'On those occasions when an error or exception condition occurs |
| 1549 | * and the target elects to repeat the information transfer, the |
| 1550 | * target may repeat the transfer either issuing a RESTORE POINTERS |
| 1551 | * message or by disconnecting without issuing a SAVE POINTERS |
| 1552 | * message. When reconnection is completed, the most recent |
| 1553 | * saved pointer values are restored.' |
| 1554 | */ |
| 1555 | acornscsi_dma_cleanup(host); |
| 1556 | host->scsi.phase = PHASE_DISCONNECT; |
| 1557 | break; |
| 1558 | |
| 1559 | case MESSAGE_REJECT: |
| 1560 | #if 0 /* this isn't needed any more */ |
| 1561 | /* |
| 1562 | * If we were negociating sync transfer, we don't yet know if |
| 1563 | * this REJECT is for the sync transfer or for the tagged queue/wide |
| 1564 | * transfer. Re-initiate sync transfer negociation now, and if |
| 1565 | * we got a REJECT in response to SDTR, then it'll be set to DONE. |
| 1566 | */ |
| 1567 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) |
| 1568 | host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; |
| 1569 | #endif |
| 1570 | |
| 1571 | /* |
| 1572 | * If we have any messages waiting to go out, then assert ATN now |
| 1573 | */ |
| 1574 | if (msgqueue_msglength(&host->scsi.msgs)) |
| 1575 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1576 | |
| 1577 | switch (host->scsi.last_message) { |
| 1578 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1579 | case HEAD_OF_QUEUE_TAG: |
| 1580 | case ORDERED_QUEUE_TAG: |
| 1581 | case SIMPLE_QUEUE_TAG: |
| 1582 | /* |
| 1583 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) |
| 1584 | * If a target does not implement tagged queuing and a queue tag |
| 1585 | * message is received, it shall respond with a MESSAGE REJECT |
| 1586 | * message and accept the I/O process as if it were untagged. |
| 1587 | */ |
| 1588 | printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", |
| 1589 | host->host->host_no, acornscsi_target(host)); |
| 1590 | host->SCpnt->device->simple_tags = 0; |
| 1591 | set_bit(host->SCpnt->device->id * 8 + host->SCpnt->device->lun, host->busyluns); |
| 1592 | break; |
| 1593 | #endif |
| 1594 | case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): |
| 1595 | /* |
| 1596 | * Target can't handle synchronous transfers |
| 1597 | */ |
| 1598 | printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", |
| 1599 | host->host->host_no, acornscsi_target(host)); |
| 1600 | host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; |
| 1601 | host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1602 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | break; |
| 1604 | |
| 1605 | default: |
| 1606 | break; |
| 1607 | } |
| 1608 | break; |
| 1609 | |
| 1610 | case QUEUE_FULL: |
| 1611 | /* TODO: target queue is full */ |
| 1612 | break; |
| 1613 | |
| 1614 | case SIMPLE_QUEUE_TAG: |
| 1615 | /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ |
| 1616 | printk("scsi%d.%c: reconnect queue tag %02X\n", |
| 1617 | host->host->host_no, acornscsi_target(host), |
| 1618 | message[1]); |
| 1619 | break; |
| 1620 | |
| 1621 | case EXTENDED_MESSAGE: |
| 1622 | switch (message[2]) { |
| 1623 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 1624 | case EXTENDED_SDTR: |
| 1625 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { |
| 1626 | /* |
| 1627 | * We requested synchronous transfers. This isn't quite right... |
| 1628 | * We can only say if this succeeded if we proceed on to execute the |
| 1629 | * command from this message. If we get a MESSAGE PARITY ERROR, |
| 1630 | * and the target retries fail, then we fallback to asynchronous mode |
| 1631 | */ |
| 1632 | host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; |
| 1633 | printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", |
| 1634 | host->host->host_no, acornscsi_target(host), |
| 1635 | message[4], message[3] * 4); |
| 1636 | host->device[host->SCpnt->device->id].sync_xfer = |
| 1637 | calc_sync_xfer(message[3] * 4, message[4]); |
| 1638 | } else { |
| 1639 | unsigned char period, length; |
| 1640 | /* |
| 1641 | * Target requested synchronous transfers. The agreement is only |
| 1642 | * to be in operation AFTER the target leaves message out phase. |
| 1643 | */ |
| 1644 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1645 | period = max_t(unsigned int, message[3], sdtr_period / 4); |
| 1646 | length = min_t(unsigned int, message[4], sdtr_size); |
| 1647 | msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, |
| 1648 | EXTENDED_SDTR, period, length); |
| 1649 | host->device[host->SCpnt->device->id].sync_xfer = |
| 1650 | calc_sync_xfer(period * 4, length); |
| 1651 | } |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1652 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | break; |
| 1654 | #else |
| 1655 | /* We do not accept synchronous transfers. Respond with a |
| 1656 | * MESSAGE_REJECT. |
| 1657 | */ |
| 1658 | #endif |
| 1659 | |
| 1660 | case EXTENDED_WDTR: |
| 1661 | /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT |
| 1662 | * to a wide data transfer request. |
| 1663 | */ |
| 1664 | default: |
| 1665 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1666 | msgqueue_flush(&host->scsi.msgs); |
| 1667 | msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); |
| 1668 | break; |
| 1669 | } |
| 1670 | break; |
| 1671 | |
| 1672 | #ifdef CONFIG_SCSI_ACORNSCSI_LINK |
| 1673 | case LINKED_CMD_COMPLETE: |
| 1674 | case LINKED_FLG_CMD_COMPLETE: |
| 1675 | /* |
| 1676 | * We don't support linked commands yet |
| 1677 | */ |
| 1678 | if (0) { |
| 1679 | #if (DEBUG & DEBUG_LINK) |
| 1680 | printk("scsi%d.%c: lun %d tag %d linked command complete\n", |
| 1681 | host->host->host_no, acornscsi_target(host), host->SCpnt->tag); |
| 1682 | #endif |
| 1683 | /* |
| 1684 | * A linked command should only terminate with one of these messages |
| 1685 | * if there are more linked commands available. |
| 1686 | */ |
| 1687 | if (!host->SCpnt->next_link) { |
| 1688 | printk(KERN_WARNING "scsi%d.%c: lun %d tag %d linked command complete, but no next_link\n", |
| 1689 | instance->host_no, acornscsi_target(host), host->SCpnt->tag); |
| 1690 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1691 | msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); |
| 1692 | } else { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 1693 | struct scsi_cmnd *SCpnt = host->SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | |
| 1695 | acornscsi_dma_cleanup(host); |
| 1696 | |
| 1697 | host->SCpnt = host->SCpnt->next_link; |
| 1698 | host->SCpnt->tag = SCpnt->tag; |
| 1699 | SCpnt->result = DID_OK | host->scsi.SCp.Message << 8 | host->Scsi.SCp.Status; |
| 1700 | SCpnt->done(SCpnt); |
| 1701 | |
| 1702 | /* initialise host->SCpnt->SCp */ |
| 1703 | } |
| 1704 | break; |
| 1705 | } |
| 1706 | #endif |
| 1707 | |
| 1708 | default: /* reject message */ |
| 1709 | printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", |
| 1710 | host->host->host_no, acornscsi_target(host), |
| 1711 | message[0]); |
| 1712 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1713 | msgqueue_flush(&host->scsi.msgs); |
| 1714 | msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); |
| 1715 | host->scsi.phase = PHASE_MSGIN; |
| 1716 | break; |
| 1717 | } |
| 1718 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * Function: int acornscsi_buildmessages(AS_Host *host) |
| 1723 | * Purpose : build the connection messages for a host |
| 1724 | * Params : host - host to add messages to |
| 1725 | */ |
| 1726 | static |
| 1727 | void acornscsi_buildmessages(AS_Host *host) |
| 1728 | { |
| 1729 | #if 0 |
| 1730 | /* does the device need resetting? */ |
| 1731 | if (cmd_reset) { |
| 1732 | msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); |
| 1733 | return; |
| 1734 | } |
| 1735 | #endif |
| 1736 | |
| 1737 | msgqueue_addmsg(&host->scsi.msgs, 1, |
| 1738 | IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, |
| 1739 | host->SCpnt->device->lun)); |
| 1740 | |
| 1741 | #if 0 |
| 1742 | /* does the device need the current command aborted */ |
| 1743 | if (cmd_aborted) { |
| 1744 | acornscsi_abortcmd(host->SCpnt->tag); |
| 1745 | return; |
| 1746 | } |
| 1747 | #endif |
| 1748 | |
| 1749 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1750 | if (host->SCpnt->tag) { |
| 1751 | unsigned int tag_type; |
| 1752 | |
| 1753 | if (host->SCpnt->cmnd[0] == REQUEST_SENSE || |
| 1754 | host->SCpnt->cmnd[0] == TEST_UNIT_READY || |
| 1755 | host->SCpnt->cmnd[0] == INQUIRY) |
| 1756 | tag_type = HEAD_OF_QUEUE_TAG; |
| 1757 | else |
| 1758 | tag_type = SIMPLE_QUEUE_TAG; |
| 1759 | msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); |
| 1760 | } |
| 1761 | #endif |
| 1762 | |
| 1763 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 1764 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { |
| 1765 | host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; |
| 1766 | msgqueue_addmsg(&host->scsi.msgs, 5, |
| 1767 | EXTENDED_MESSAGE, 3, EXTENDED_SDTR, |
| 1768 | sdtr_period / 4, sdtr_size); |
| 1769 | } |
| 1770 | #endif |
| 1771 | } |
| 1772 | |
| 1773 | /* |
| 1774 | * Function: int acornscsi_starttransfer(AS_Host *host) |
| 1775 | * Purpose : transfer data to/from connected target |
| 1776 | * Params : host - host to which target is connected |
| 1777 | * Returns : 0 if failure |
| 1778 | */ |
| 1779 | static |
| 1780 | int acornscsi_starttransfer(AS_Host *host) |
| 1781 | { |
| 1782 | int residual; |
| 1783 | |
| 1784 | if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { |
| 1785 | printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", |
| 1786 | host->host->host_no, acornscsi_target(host)); |
| 1787 | return 0; |
| 1788 | } |
| 1789 | |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 1790 | residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1792 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); |
| 1793 | sbic_arm_writenext(host, residual >> 16); |
| 1794 | sbic_arm_writenext(host, residual >> 8); |
| 1795 | sbic_arm_writenext(host, residual); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1797 | return 1; |
| 1798 | } |
| 1799 | |
| 1800 | /* ========================================================================================= |
| 1801 | * Connection & Disconnection |
| 1802 | */ |
| 1803 | /* |
| 1804 | * Function : acornscsi_reconnect(AS_Host *host) |
| 1805 | * Purpose : reconnect a previously disconnected command |
| 1806 | * Params : host - host specific data |
| 1807 | * Remarks : SCSI spec says: |
| 1808 | * 'The set of active pointers is restored from the set |
| 1809 | * of saved pointers upon reconnection of the I/O process' |
| 1810 | */ |
| 1811 | static |
| 1812 | int acornscsi_reconnect(AS_Host *host) |
| 1813 | { |
| 1814 | unsigned int target, lun, ok = 0; |
| 1815 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1816 | target = sbic_arm_read(host, SBIC_SOURCEID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | |
| 1818 | if (!(target & 8)) |
| 1819 | printk(KERN_ERR "scsi%d: invalid source id after reselection " |
| 1820 | "- device fault?\n", |
| 1821 | host->host->host_no); |
| 1822 | |
| 1823 | target &= 7; |
| 1824 | |
| 1825 | if (host->SCpnt && !host->scsi.disconnectable) { |
| 1826 | printk(KERN_ERR "scsi%d.%d: reconnected while command in " |
| 1827 | "progress to target %d?\n", |
| 1828 | host->host->host_no, target, host->SCpnt->device->id); |
| 1829 | host->SCpnt = NULL; |
| 1830 | } |
| 1831 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1832 | lun = sbic_arm_read(host, SBIC_DATA) & 7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
| 1834 | host->scsi.reconnected.target = target; |
| 1835 | host->scsi.reconnected.lun = lun; |
| 1836 | host->scsi.reconnected.tag = 0; |
| 1837 | |
| 1838 | if (host->scsi.disconnectable && host->SCpnt && |
| 1839 | host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) |
| 1840 | ok = 1; |
| 1841 | |
| 1842 | if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) |
| 1843 | ok = 1; |
| 1844 | |
| 1845 | ADD_STATUS(target, 0x81, host->scsi.phase, 0); |
| 1846 | |
| 1847 | if (ok) { |
| 1848 | host->scsi.phase = PHASE_RECONNECTED; |
| 1849 | } else { |
| 1850 | /* this doesn't seem to work */ |
| 1851 | printk(KERN_ERR "scsi%d.%c: reselected with no command " |
| 1852 | "to reconnect with\n", |
| 1853 | host->host->host_no, '0' + target); |
| 1854 | acornscsi_dumplog(host, target); |
| 1855 | acornscsi_abortcmd(host, 0); |
| 1856 | if (host->SCpnt) { |
| 1857 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 1858 | host->SCpnt = NULL; |
| 1859 | } |
| 1860 | } |
| 1861 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1862 | return !ok; |
| 1863 | } |
| 1864 | |
| 1865 | /* |
| 1866 | * Function: int acornscsi_reconect_finish(AS_Host *host) |
| 1867 | * Purpose : finish reconnecting a command |
| 1868 | * Params : host - host to complete |
| 1869 | * Returns : 0 if failed |
| 1870 | */ |
| 1871 | static |
| 1872 | int acornscsi_reconnect_finish(AS_Host *host) |
| 1873 | { |
| 1874 | if (host->scsi.disconnectable && host->SCpnt) { |
| 1875 | host->scsi.disconnectable = 0; |
| 1876 | if (host->SCpnt->device->id == host->scsi.reconnected.target && |
| 1877 | host->SCpnt->device->lun == host->scsi.reconnected.lun && |
| 1878 | host->SCpnt->tag == host->scsi.reconnected.tag) { |
| 1879 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1880 | DBG(host->SCpnt, printk("scsi%d.%c: reconnected", |
| 1881 | host->host->host_no, acornscsi_target(host))); |
| 1882 | #endif |
| 1883 | } else { |
| 1884 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 1885 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1886 | DBG(host->SCpnt, printk("scsi%d.%c: had to move command " |
| 1887 | "to disconnected queue\n", |
| 1888 | host->host->host_no, acornscsi_target(host))); |
| 1889 | #endif |
| 1890 | host->SCpnt = NULL; |
| 1891 | } |
| 1892 | } |
| 1893 | if (!host->SCpnt) { |
| 1894 | host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, |
| 1895 | host->scsi.reconnected.target, |
| 1896 | host->scsi.reconnected.lun, |
| 1897 | host->scsi.reconnected.tag); |
| 1898 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1899 | DBG(host->SCpnt, printk("scsi%d.%c: had to get command", |
| 1900 | host->host->host_no, acornscsi_target(host))); |
| 1901 | #endif |
| 1902 | } |
| 1903 | |
| 1904 | if (!host->SCpnt) |
| 1905 | acornscsi_abortcmd(host, host->scsi.reconnected.tag); |
| 1906 | else { |
| 1907 | /* |
| 1908 | * Restore data pointer from SAVED pointers. |
| 1909 | */ |
| 1910 | host->scsi.SCp = host->SCpnt->SCp; |
| 1911 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1912 | printk(", data pointers: [%p, %X]", |
| 1913 | host->scsi.SCp.ptr, host->scsi.SCp.this_residual); |
| 1914 | #endif |
| 1915 | } |
| 1916 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1917 | printk("\n"); |
| 1918 | #endif |
| 1919 | |
| 1920 | host->dma.transferred = host->scsi.SCp.scsi_xferred; |
| 1921 | |
| 1922 | return host->SCpnt != NULL; |
| 1923 | } |
| 1924 | |
| 1925 | /* |
| 1926 | * Function: void acornscsi_disconnect_unexpected(AS_Host *host) |
| 1927 | * Purpose : handle an unexpected disconnect |
| 1928 | * Params : host - host on which disconnect occurred |
| 1929 | */ |
| 1930 | static |
| 1931 | void acornscsi_disconnect_unexpected(AS_Host *host) |
| 1932 | { |
| 1933 | printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", |
| 1934 | host->host->host_no, acornscsi_target(host)); |
| 1935 | #if (DEBUG & DEBUG_ABORT) |
| 1936 | acornscsi_dumplog(host, 8); |
| 1937 | #endif |
| 1938 | |
| 1939 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 1940 | } |
| 1941 | |
| 1942 | /* |
| 1943 | * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) |
| 1944 | * Purpose : abort a currently executing command |
| 1945 | * Params : host - host with connected command to abort |
| 1946 | * tag - tag to abort |
| 1947 | */ |
| 1948 | static |
| 1949 | void acornscsi_abortcmd(AS_Host *host, unsigned char tag) |
| 1950 | { |
| 1951 | host->scsi.phase = PHASE_ABORTED; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1952 | sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | |
| 1954 | msgqueue_flush(&host->scsi.msgs); |
| 1955 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1956 | if (tag) |
| 1957 | msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); |
| 1958 | else |
| 1959 | #endif |
| 1960 | msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); |
| 1961 | } |
| 1962 | |
| 1963 | /* ========================================================================================== |
| 1964 | * Interrupt routines. |
| 1965 | */ |
| 1966 | /* |
| 1967 | * Function: int acornscsi_sbicintr(AS_Host *host) |
| 1968 | * Purpose : handle interrupts from SCSI device |
| 1969 | * Params : host - host to process |
| 1970 | * Returns : INTR_PROCESS if expecting another SBIC interrupt |
| 1971 | * INTR_IDLE if no interrupt |
| 1972 | * INTR_NEXT_COMMAND if we have finished processing the command |
| 1973 | */ |
| 1974 | static |
| 1975 | intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) |
| 1976 | { |
| 1977 | unsigned int asr, ssr; |
| 1978 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1979 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | if (!(asr & ASR_INT)) |
| 1981 | return INTR_IDLE; |
| 1982 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1983 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | |
| 1985 | #if (DEBUG & DEBUG_PHASES) |
| 1986 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 1987 | #endif |
| 1988 | |
| 1989 | ADD_STATUS(8, ssr, host->scsi.phase, in_irq); |
| 1990 | |
| 1991 | if (host->SCpnt && !host->scsi.disconnectable) |
| 1992 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); |
| 1993 | |
| 1994 | switch (ssr) { |
| 1995 | case 0x00: /* reset state - not advanced */ |
| 1996 | printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", |
| 1997 | host->host->host_no); |
| 1998 | /* setup sbic - WD33C93A */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1999 | sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); |
| 2000 | sbic_arm_write(host, SBIC_CMND, CMND_RESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2001 | return INTR_IDLE; |
| 2002 | |
| 2003 | case 0x01: /* reset state - advanced */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2004 | sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); |
| 2005 | sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); |
| 2006 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); |
| 2007 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | msgqueue_flush(&host->scsi.msgs); |
| 2009 | return INTR_IDLE; |
| 2010 | |
| 2011 | case 0x41: /* unexpected disconnect aborted command */ |
| 2012 | acornscsi_disconnect_unexpected(host); |
| 2013 | return INTR_NEXT_COMMAND; |
| 2014 | } |
| 2015 | |
| 2016 | switch (host->scsi.phase) { |
| 2017 | case PHASE_CONNECTING: /* STATE: command removed from issue queue */ |
| 2018 | switch (ssr) { |
| 2019 | case 0x11: /* -> PHASE_CONNECTED */ |
| 2020 | /* BUS FREE -> SELECTION */ |
| 2021 | host->scsi.phase = PHASE_CONNECTED; |
| 2022 | msgqueue_flush(&host->scsi.msgs); |
| 2023 | host->dma.transferred = host->scsi.SCp.scsi_xferred; |
| 2024 | /* 33C93 gives next interrupt indicating bus phase */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2025 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | if (!(asr & ASR_INT)) |
| 2027 | break; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2028 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | ADD_STATUS(8, ssr, host->scsi.phase, 1); |
| 2030 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); |
| 2031 | goto connected; |
| 2032 | |
| 2033 | case 0x42: /* select timed out */ |
| 2034 | /* -> PHASE_IDLE */ |
| 2035 | acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); |
| 2036 | return INTR_NEXT_COMMAND; |
| 2037 | |
| 2038 | case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ |
| 2039 | /* BUS FREE -> RESELECTION */ |
| 2040 | host->origSCpnt = host->SCpnt; |
| 2041 | host->SCpnt = NULL; |
| 2042 | msgqueue_flush(&host->scsi.msgs); |
| 2043 | acornscsi_reconnect(host); |
| 2044 | break; |
| 2045 | |
| 2046 | default: |
| 2047 | printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", |
| 2048 | host->host->host_no, acornscsi_target(host), ssr); |
| 2049 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2050 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2051 | } |
| 2052 | return INTR_PROCESSING; |
| 2053 | |
| 2054 | connected: |
| 2055 | case PHASE_CONNECTED: /* STATE: device selected ok */ |
| 2056 | switch (ssr) { |
| 2057 | #ifdef NONSTANDARD |
| 2058 | case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2059 | /* SELECTION -> COMMAND */ |
| 2060 | acornscsi_sendcommand(host); |
| 2061 | break; |
| 2062 | |
| 2063 | case 0x8b: /* -> PHASE_STATUS */ |
| 2064 | /* SELECTION -> STATUS */ |
| 2065 | acornscsi_readstatusbyte(host); |
| 2066 | host->scsi.phase = PHASE_STATUSIN; |
| 2067 | break; |
| 2068 | #endif |
| 2069 | |
| 2070 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2071 | /* SELECTION ->MESSAGE OUT */ |
| 2072 | host->scsi.phase = PHASE_MSGOUT; |
| 2073 | acornscsi_buildmessages(host); |
| 2074 | acornscsi_sendmessage(host); |
| 2075 | break; |
| 2076 | |
| 2077 | /* these should not happen */ |
| 2078 | case 0x85: /* target disconnected */ |
| 2079 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 2080 | break; |
| 2081 | |
| 2082 | default: |
| 2083 | printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", |
| 2084 | host->host->host_no, acornscsi_target(host), ssr); |
| 2085 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2086 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2087 | } |
| 2088 | return INTR_PROCESSING; |
| 2089 | |
| 2090 | case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ |
| 2091 | /* |
| 2092 | * SCSI standard says that MESSAGE OUT phases can be followed by a |
| 2093 | * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase |
| 2094 | */ |
| 2095 | switch (ssr) { |
| 2096 | case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2097 | case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2098 | /* MESSAGE OUT -> COMMAND */ |
| 2099 | acornscsi_sendcommand(host); |
| 2100 | break; |
| 2101 | |
| 2102 | case 0x8b: /* -> PHASE_STATUS */ |
| 2103 | case 0x1b: /* -> PHASE_STATUS */ |
| 2104 | /* MESSAGE OUT -> STATUS */ |
| 2105 | acornscsi_readstatusbyte(host); |
| 2106 | host->scsi.phase = PHASE_STATUSIN; |
| 2107 | break; |
| 2108 | |
| 2109 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2110 | /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ |
| 2111 | acornscsi_sendmessage(host); |
| 2112 | break; |
| 2113 | |
| 2114 | case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2115 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2116 | /* MESSAGE OUT -> MESSAGE IN */ |
| 2117 | acornscsi_message(host); |
| 2118 | break; |
| 2119 | |
| 2120 | default: |
| 2121 | printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", |
| 2122 | host->host->host_no, acornscsi_target(host), ssr); |
| 2123 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2124 | } |
| 2125 | return INTR_PROCESSING; |
| 2126 | |
| 2127 | case PHASE_COMMAND: /* STATE: connected & command sent */ |
| 2128 | switch (ssr) { |
| 2129 | case 0x18: /* -> PHASE_DATAOUT */ |
| 2130 | /* COMMAND -> DATA OUT */ |
| 2131 | if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) |
| 2132 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2133 | acornscsi_dma_setup(host, DMA_OUT); |
| 2134 | if (!acornscsi_starttransfer(host)) |
| 2135 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2136 | host->scsi.phase = PHASE_DATAOUT; |
| 2137 | return INTR_IDLE; |
| 2138 | |
| 2139 | case 0x19: /* -> PHASE_DATAIN */ |
| 2140 | /* COMMAND -> DATA IN */ |
| 2141 | if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) |
| 2142 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2143 | acornscsi_dma_setup(host, DMA_IN); |
| 2144 | if (!acornscsi_starttransfer(host)) |
| 2145 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2146 | host->scsi.phase = PHASE_DATAIN; |
| 2147 | return INTR_IDLE; |
| 2148 | |
| 2149 | case 0x1b: /* -> PHASE_STATUS */ |
| 2150 | /* COMMAND -> STATUS */ |
| 2151 | acornscsi_readstatusbyte(host); |
| 2152 | host->scsi.phase = PHASE_STATUSIN; |
| 2153 | break; |
| 2154 | |
| 2155 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2156 | /* COMMAND -> MESSAGE OUT */ |
| 2157 | acornscsi_sendmessage(host); |
| 2158 | break; |
| 2159 | |
| 2160 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2161 | /* COMMAND -> MESSAGE IN */ |
| 2162 | acornscsi_message(host); |
| 2163 | break; |
| 2164 | |
| 2165 | default: |
| 2166 | printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n", |
| 2167 | host->host->host_no, acornscsi_target(host), ssr); |
| 2168 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2169 | } |
| 2170 | return INTR_PROCESSING; |
| 2171 | |
| 2172 | case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ |
| 2173 | if (ssr == 0x85) { /* -> PHASE_IDLE */ |
| 2174 | host->scsi.disconnectable = 1; |
| 2175 | host->scsi.reconnected.tag = 0; |
| 2176 | host->scsi.phase = PHASE_IDLE; |
| 2177 | host->stats.disconnects += 1; |
| 2178 | } else { |
| 2179 | printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", |
| 2180 | host->host->host_no, acornscsi_target(host), ssr); |
| 2181 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2182 | } |
| 2183 | return INTR_NEXT_COMMAND; |
| 2184 | |
| 2185 | case PHASE_IDLE: /* STATE: disconnected */ |
| 2186 | if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ |
| 2187 | acornscsi_reconnect(host); |
| 2188 | else { |
| 2189 | printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", |
| 2190 | host->host->host_no, acornscsi_target(host), ssr); |
| 2191 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2192 | } |
| 2193 | return INTR_PROCESSING; |
| 2194 | |
| 2195 | case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ |
| 2196 | /* |
| 2197 | * Command reconnected - if MESGIN, get message - it may be |
| 2198 | * the tag. If not, get command out of disconnected queue |
| 2199 | */ |
| 2200 | /* |
| 2201 | * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, |
| 2202 | * reconnect I_T_L command |
| 2203 | */ |
| 2204 | if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) |
| 2205 | return INTR_IDLE; |
| 2206 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); |
| 2207 | switch (ssr) { |
| 2208 | case 0x88: /* data out phase */ |
| 2209 | /* -> PHASE_DATAOUT */ |
| 2210 | /* MESSAGE IN -> DATA OUT */ |
| 2211 | acornscsi_dma_setup(host, DMA_OUT); |
| 2212 | if (!acornscsi_starttransfer(host)) |
| 2213 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2214 | host->scsi.phase = PHASE_DATAOUT; |
| 2215 | return INTR_IDLE; |
| 2216 | |
| 2217 | case 0x89: /* data in phase */ |
| 2218 | /* -> PHASE_DATAIN */ |
| 2219 | /* MESSAGE IN -> DATA IN */ |
| 2220 | acornscsi_dma_setup(host, DMA_IN); |
| 2221 | if (!acornscsi_starttransfer(host)) |
| 2222 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2223 | host->scsi.phase = PHASE_DATAIN; |
| 2224 | return INTR_IDLE; |
| 2225 | |
| 2226 | case 0x8a: /* command out */ |
| 2227 | /* MESSAGE IN -> COMMAND */ |
| 2228 | acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2229 | break; |
| 2230 | |
| 2231 | case 0x8b: /* status in */ |
| 2232 | /* -> PHASE_STATUSIN */ |
| 2233 | /* MESSAGE IN -> STATUS */ |
| 2234 | acornscsi_readstatusbyte(host); |
| 2235 | host->scsi.phase = PHASE_STATUSIN; |
| 2236 | break; |
| 2237 | |
| 2238 | case 0x8e: /* message out */ |
| 2239 | /* -> PHASE_MSGOUT */ |
| 2240 | /* MESSAGE IN -> MESSAGE OUT */ |
| 2241 | acornscsi_sendmessage(host); |
| 2242 | break; |
| 2243 | |
| 2244 | case 0x8f: /* message in */ |
| 2245 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2246 | break; |
| 2247 | |
| 2248 | default: |
| 2249 | printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", |
| 2250 | host->host->host_no, acornscsi_target(host), ssr); |
| 2251 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2252 | } |
| 2253 | return INTR_PROCESSING; |
| 2254 | |
| 2255 | case PHASE_DATAIN: /* STATE: transferred data in */ |
| 2256 | /* |
| 2257 | * This is simple - if we disconnect then the DMA address & count is |
| 2258 | * correct. |
| 2259 | */ |
| 2260 | switch (ssr) { |
| 2261 | case 0x19: /* -> PHASE_DATAIN */ |
| 2262 | case 0x89: /* -> PHASE_DATAIN */ |
| 2263 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2264 | return INTR_IDLE; |
| 2265 | |
| 2266 | case 0x1b: /* -> PHASE_STATUSIN */ |
| 2267 | case 0x4b: /* -> PHASE_STATUSIN */ |
| 2268 | case 0x8b: /* -> PHASE_STATUSIN */ |
| 2269 | /* DATA IN -> STATUS */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2270 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | acornscsi_sbic_xfcount(host); |
| 2272 | acornscsi_dma_stop(host); |
| 2273 | acornscsi_readstatusbyte(host); |
| 2274 | host->scsi.phase = PHASE_STATUSIN; |
| 2275 | break; |
| 2276 | |
| 2277 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2278 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2279 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2280 | /* DATA IN -> MESSAGE OUT */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2281 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | acornscsi_sbic_xfcount(host); |
| 2283 | acornscsi_dma_stop(host); |
| 2284 | acornscsi_sendmessage(host); |
| 2285 | break; |
| 2286 | |
| 2287 | case 0x1f: /* message in */ |
| 2288 | case 0x4f: /* message in */ |
| 2289 | case 0x8f: /* message in */ |
| 2290 | /* DATA IN -> MESSAGE IN */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2291 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | acornscsi_sbic_xfcount(host); |
| 2293 | acornscsi_dma_stop(host); |
| 2294 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2295 | break; |
| 2296 | |
| 2297 | default: |
| 2298 | printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", |
| 2299 | host->host->host_no, acornscsi_target(host), ssr); |
| 2300 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2301 | } |
| 2302 | return INTR_PROCESSING; |
| 2303 | |
| 2304 | case PHASE_DATAOUT: /* STATE: transferred data out */ |
| 2305 | /* |
| 2306 | * This is more complicated - if we disconnect, the DMA could be 12 |
| 2307 | * bytes ahead of us. We need to correct this. |
| 2308 | */ |
| 2309 | switch (ssr) { |
| 2310 | case 0x18: /* -> PHASE_DATAOUT */ |
| 2311 | case 0x88: /* -> PHASE_DATAOUT */ |
| 2312 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2313 | return INTR_IDLE; |
| 2314 | |
| 2315 | case 0x1b: /* -> PHASE_STATUSIN */ |
| 2316 | case 0x4b: /* -> PHASE_STATUSIN */ |
| 2317 | case 0x8b: /* -> PHASE_STATUSIN */ |
| 2318 | /* DATA OUT -> STATUS */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2319 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | acornscsi_sbic_xfcount(host); |
| 2321 | acornscsi_dma_stop(host); |
| 2322 | acornscsi_dma_adjust(host); |
| 2323 | acornscsi_readstatusbyte(host); |
| 2324 | host->scsi.phase = PHASE_STATUSIN; |
| 2325 | break; |
| 2326 | |
| 2327 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2328 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2329 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2330 | /* DATA OUT -> MESSAGE OUT */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2331 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | acornscsi_sbic_xfcount(host); |
| 2333 | acornscsi_dma_stop(host); |
| 2334 | acornscsi_dma_adjust(host); |
| 2335 | acornscsi_sendmessage(host); |
| 2336 | break; |
| 2337 | |
| 2338 | case 0x1f: /* message in */ |
| 2339 | case 0x4f: /* message in */ |
| 2340 | case 0x8f: /* message in */ |
| 2341 | /* DATA OUT -> MESSAGE IN */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2342 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | acornscsi_sbic_xfcount(host); |
| 2344 | acornscsi_dma_stop(host); |
| 2345 | acornscsi_dma_adjust(host); |
| 2346 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2347 | break; |
| 2348 | |
| 2349 | default: |
| 2350 | printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", |
| 2351 | host->host->host_no, acornscsi_target(host), ssr); |
| 2352 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2353 | } |
| 2354 | return INTR_PROCESSING; |
| 2355 | |
| 2356 | case PHASE_STATUSIN: /* STATE: status in complete */ |
| 2357 | switch (ssr) { |
| 2358 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2359 | case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2360 | /* STATUS -> MESSAGE IN */ |
| 2361 | acornscsi_message(host); |
| 2362 | break; |
| 2363 | |
| 2364 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2365 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2366 | /* STATUS -> MESSAGE OUT */ |
| 2367 | acornscsi_sendmessage(host); |
| 2368 | break; |
| 2369 | |
| 2370 | default: |
| 2371 | printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", |
| 2372 | host->host->host_no, acornscsi_target(host), ssr); |
| 2373 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2374 | } |
| 2375 | return INTR_PROCESSING; |
| 2376 | |
| 2377 | case PHASE_MSGIN: /* STATE: message in */ |
| 2378 | switch (ssr) { |
| 2379 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2380 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2381 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2382 | /* MESSAGE IN -> MESSAGE OUT */ |
| 2383 | acornscsi_sendmessage(host); |
| 2384 | break; |
| 2385 | |
| 2386 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2387 | case 0x2f: |
| 2388 | case 0x4f: |
| 2389 | case 0x8f: |
| 2390 | acornscsi_message(host); |
| 2391 | break; |
| 2392 | |
| 2393 | case 0x85: |
| 2394 | printk("scsi%d.%c: strange message in disconnection\n", |
| 2395 | host->host->host_no, acornscsi_target(host)); |
| 2396 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2397 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 2398 | break; |
| 2399 | |
| 2400 | default: |
| 2401 | printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", |
| 2402 | host->host->host_no, acornscsi_target(host), ssr); |
| 2403 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2404 | } |
| 2405 | return INTR_PROCESSING; |
| 2406 | |
| 2407 | case PHASE_DONE: /* STATE: received status & message */ |
| 2408 | switch (ssr) { |
| 2409 | case 0x85: /* -> PHASE_IDLE */ |
| 2410 | acornscsi_done(host, &host->SCpnt, DID_OK); |
| 2411 | return INTR_NEXT_COMMAND; |
| 2412 | |
| 2413 | case 0x1e: |
| 2414 | case 0x8e: |
| 2415 | acornscsi_sendmessage(host); |
| 2416 | break; |
| 2417 | |
| 2418 | default: |
| 2419 | printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", |
| 2420 | host->host->host_no, acornscsi_target(host), ssr); |
| 2421 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2422 | } |
| 2423 | return INTR_PROCESSING; |
| 2424 | |
| 2425 | case PHASE_ABORTED: |
| 2426 | switch (ssr) { |
| 2427 | case 0x85: |
| 2428 | if (host->SCpnt) |
| 2429 | acornscsi_done(host, &host->SCpnt, DID_ABORT); |
| 2430 | else { |
| 2431 | clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, |
| 2432 | host->busyluns); |
| 2433 | host->scsi.phase = PHASE_IDLE; |
| 2434 | } |
| 2435 | return INTR_NEXT_COMMAND; |
| 2436 | |
| 2437 | case 0x1e: |
| 2438 | case 0x2e: |
| 2439 | case 0x4e: |
| 2440 | case 0x8e: |
| 2441 | acornscsi_sendmessage(host); |
| 2442 | break; |
| 2443 | |
| 2444 | default: |
| 2445 | printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n", |
| 2446 | host->host->host_no, acornscsi_target(host), ssr); |
| 2447 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2448 | } |
| 2449 | return INTR_PROCESSING; |
| 2450 | |
| 2451 | default: |
| 2452 | printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", |
| 2453 | host->host->host_no, acornscsi_target(host), ssr); |
| 2454 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2455 | } |
| 2456 | return INTR_PROCESSING; |
| 2457 | } |
| 2458 | |
| 2459 | /* |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2460 | * Prototype: void acornscsi_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | * Purpose : handle interrupts from Acorn SCSI card |
| 2462 | * Params : irq - interrupt number |
| 2463 | * dev_id - device specific data (AS_Host structure) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | */ |
| 2465 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2466 | acornscsi_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | { |
| 2468 | AS_Host *host = (AS_Host *)dev_id; |
| 2469 | intr_ret_t ret; |
| 2470 | int iostatus; |
| 2471 | int in_irq = 0; |
| 2472 | |
| 2473 | do { |
| 2474 | ret = INTR_IDLE; |
| 2475 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2476 | iostatus = readb(host->fast + INT_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | |
| 2478 | if (iostatus & 2) { |
| 2479 | acornscsi_dma_intr(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2480 | iostatus = readb(host->fast + INT_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | } |
| 2482 | |
| 2483 | if (iostatus & 8) |
| 2484 | ret = acornscsi_sbicintr(host, in_irq); |
| 2485 | |
| 2486 | /* |
| 2487 | * If we have a transfer pending, start it. |
| 2488 | * Only start it if the interface has already started transferring |
| 2489 | * it's data |
| 2490 | */ |
| 2491 | if (host->dma.xfer_required) |
| 2492 | acornscsi_dma_xfer(host); |
| 2493 | |
| 2494 | if (ret == INTR_NEXT_COMMAND) |
| 2495 | ret = acornscsi_kick(host); |
| 2496 | |
| 2497 | in_irq = 1; |
| 2498 | } while (ret != INTR_IDLE); |
| 2499 | |
| 2500 | return IRQ_HANDLED; |
| 2501 | } |
| 2502 | |
| 2503 | /*============================================================================================= |
| 2504 | * Interfaces between interrupt handler and rest of scsi code |
| 2505 | */ |
| 2506 | |
| 2507 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2508 | * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | * Purpose : queues a SCSI command |
| 2510 | * Params : cmd - SCSI command |
| 2511 | * done - function called on completion, with pointer to command descriptor |
| 2512 | * Returns : 0, or < 0 on error. |
| 2513 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2514 | int acornscsi_queuecmd(struct scsi_cmnd *SCpnt, |
| 2515 | void (*done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | { |
| 2517 | AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; |
| 2518 | |
| 2519 | if (!done) { |
| 2520 | /* there should be some way of rejecting errors like this without panicing... */ |
| 2521 | panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", |
| 2522 | host->host->host_no, SCpnt); |
| 2523 | return -EINVAL; |
| 2524 | } |
| 2525 | |
| 2526 | #if (DEBUG & DEBUG_NO_WRITE) |
| 2527 | if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { |
| 2528 | printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", |
| 2529 | host->host->host_no, '0' + SCpnt->device->id); |
| 2530 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2531 | done(SCpnt); |
| 2532 | return 0; |
| 2533 | } |
| 2534 | #endif |
| 2535 | |
| 2536 | SCpnt->scsi_done = done; |
| 2537 | SCpnt->host_scribble = NULL; |
| 2538 | SCpnt->result = 0; |
| 2539 | SCpnt->tag = 0; |
| 2540 | SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); |
| 2541 | SCpnt->SCp.sent_command = 0; |
| 2542 | SCpnt->SCp.scsi_xferred = 0; |
| 2543 | |
| 2544 | init_SCp(SCpnt); |
| 2545 | |
| 2546 | host->stats.queues += 1; |
| 2547 | |
| 2548 | { |
| 2549 | unsigned long flags; |
| 2550 | |
| 2551 | if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { |
| 2552 | SCpnt->result = DID_ERROR << 16; |
| 2553 | done(SCpnt); |
| 2554 | return 0; |
| 2555 | } |
| 2556 | local_irq_save(flags); |
| 2557 | if (host->scsi.phase == PHASE_IDLE) |
| 2558 | acornscsi_kick(host); |
| 2559 | local_irq_restore(flags); |
| 2560 | } |
| 2561 | return 0; |
| 2562 | } |
| 2563 | |
| 2564 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2565 | * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 |
| 2567 | * Params : SCpntp1 - pointer to command to return |
| 2568 | * SCpntp2 - pointer to command to check |
| 2569 | * result - result to pass back to mid-level done function |
| 2570 | * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. |
| 2571 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2572 | static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, |
| 2573 | struct scsi_cmnd **SCpntp2, |
| 2574 | int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2576 | struct scsi_cmnd *SCpnt = *SCpntp1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | |
| 2578 | if (SCpnt) { |
| 2579 | *SCpntp1 = NULL; |
| 2580 | |
| 2581 | SCpnt->result = result; |
| 2582 | SCpnt->scsi_done(SCpnt); |
| 2583 | } |
| 2584 | |
| 2585 | if (SCpnt == *SCpntp2) |
| 2586 | *SCpntp2 = NULL; |
| 2587 | } |
| 2588 | |
| 2589 | enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; |
| 2590 | |
| 2591 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2592 | * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | * Purpose : abort a command on this host |
| 2594 | * Params : SCpnt - command to abort |
| 2595 | * Returns : our abort status |
| 2596 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2597 | static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | { |
| 2599 | enum res_abort res = res_not_running; |
| 2600 | |
| 2601 | if (queue_remove_cmd(&host->queues.issue, SCpnt)) { |
| 2602 | /* |
| 2603 | * The command was on the issue queue, and has not been |
| 2604 | * issued yet. We can remove the command from the queue, |
| 2605 | * and acknowledge the abort. Neither the devices nor the |
| 2606 | * interface know about the command. |
| 2607 | */ |
| 2608 | //#if (DEBUG & DEBUG_ABORT) |
| 2609 | printk("on issue queue "); |
| 2610 | //#endif |
| 2611 | res = res_success; |
| 2612 | } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { |
| 2613 | /* |
| 2614 | * The command was on the disconnected queue. Simply |
| 2615 | * acknowledge the abort condition, and when the target |
| 2616 | * reconnects, we will give it an ABORT message. The |
| 2617 | * target should then disconnect, and we will clear |
| 2618 | * the busylun bit. |
| 2619 | */ |
| 2620 | //#if (DEBUG & DEBUG_ABORT) |
| 2621 | printk("on disconnected queue "); |
| 2622 | //#endif |
| 2623 | res = res_success; |
| 2624 | } else if (host->SCpnt == SCpnt) { |
| 2625 | unsigned long flags; |
| 2626 | |
| 2627 | //#if (DEBUG & DEBUG_ABORT) |
| 2628 | printk("executing "); |
| 2629 | //#endif |
| 2630 | |
| 2631 | local_irq_save(flags); |
| 2632 | switch (host->scsi.phase) { |
| 2633 | /* |
| 2634 | * If the interface is idle, and the command is 'disconnectable', |
| 2635 | * then it is the same as on the disconnected queue. We simply |
| 2636 | * remove all traces of the command. When the target reconnects, |
| 2637 | * we will give it an ABORT message since the command could not |
| 2638 | * be found. When the target finally disconnects, we will clear |
| 2639 | * the busylun bit. |
| 2640 | */ |
| 2641 | case PHASE_IDLE: |
| 2642 | if (host->scsi.disconnectable) { |
| 2643 | host->scsi.disconnectable = 0; |
| 2644 | host->SCpnt = NULL; |
| 2645 | res = res_success; |
| 2646 | } |
| 2647 | break; |
| 2648 | |
| 2649 | /* |
| 2650 | * If the command has connected and done nothing further, |
| 2651 | * simply force a disconnect. We also need to clear the |
| 2652 | * busylun bit. |
| 2653 | */ |
| 2654 | case PHASE_CONNECTED: |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2655 | sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | host->SCpnt = NULL; |
| 2657 | res = res_success_clear; |
| 2658 | break; |
| 2659 | |
| 2660 | default: |
| 2661 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2662 | res = res_snooze; |
| 2663 | } |
| 2664 | local_irq_restore(flags); |
| 2665 | } else if (host->origSCpnt == SCpnt) { |
| 2666 | /* |
| 2667 | * The command will be executed next, but a command |
| 2668 | * is currently using the interface. This is similar to |
| 2669 | * being on the issue queue, except the busylun bit has |
| 2670 | * been set. |
| 2671 | */ |
| 2672 | host->origSCpnt = NULL; |
| 2673 | //#if (DEBUG & DEBUG_ABORT) |
| 2674 | printk("waiting for execution "); |
| 2675 | //#endif |
| 2676 | res = res_success_clear; |
| 2677 | } else |
| 2678 | printk("unknown "); |
| 2679 | |
| 2680 | return res; |
| 2681 | } |
| 2682 | |
| 2683 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2684 | * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | * Purpose : abort a command on this host |
| 2686 | * Params : SCpnt - command to abort |
| 2687 | * Returns : one of SCSI_ABORT_ macros |
| 2688 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2689 | int acornscsi_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | { |
| 2691 | AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; |
| 2692 | int result; |
| 2693 | |
| 2694 | host->stats.aborts += 1; |
| 2695 | |
| 2696 | #if (DEBUG & DEBUG_ABORT) |
| 2697 | { |
| 2698 | int asr, ssr; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2699 | asr = sbic_arm_read(host, SBIC_ASR); |
| 2700 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | |
| 2702 | printk(KERN_WARNING "acornscsi_abort: "); |
| 2703 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 2704 | acornscsi_dumplog(host, SCpnt->device->id); |
| 2705 | } |
| 2706 | #endif |
| 2707 | |
| 2708 | printk("scsi%d: ", host->host->host_no); |
| 2709 | |
| 2710 | switch (acornscsi_do_abort(host, SCpnt)) { |
| 2711 | /* |
| 2712 | * We managed to find the command and cleared it out. |
| 2713 | * We do not expect the command to be executing on the |
| 2714 | * target, but we have set the busylun bit. |
| 2715 | */ |
| 2716 | case res_success_clear: |
| 2717 | //#if (DEBUG & DEBUG_ABORT) |
| 2718 | printk("clear "); |
| 2719 | //#endif |
| 2720 | clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); |
| 2721 | |
| 2722 | /* |
| 2723 | * We found the command, and cleared it out. Either |
| 2724 | * the command is still known to be executing on the |
| 2725 | * target, or the busylun bit is not set. |
| 2726 | */ |
| 2727 | case res_success: |
| 2728 | //#if (DEBUG & DEBUG_ABORT) |
| 2729 | printk("success\n"); |
| 2730 | //#endif |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2731 | result = SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | break; |
| 2733 | |
| 2734 | /* |
| 2735 | * We did find the command, but unfortunately we couldn't |
| 2736 | * unhook it from ourselves. Wait some more, and if it |
| 2737 | * still doesn't complete, reset the interface. |
| 2738 | */ |
| 2739 | case res_snooze: |
| 2740 | //#if (DEBUG & DEBUG_ABORT) |
| 2741 | printk("snooze\n"); |
| 2742 | //#endif |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2743 | result = FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2744 | break; |
| 2745 | |
| 2746 | /* |
| 2747 | * The command could not be found (either because it completed, |
| 2748 | * or it got dropped. |
| 2749 | */ |
| 2750 | default: |
| 2751 | case res_not_running: |
| 2752 | acornscsi_dumplog(host, SCpnt->device->id); |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2753 | result = FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | //#if (DEBUG & DEBUG_ABORT) |
| 2755 | printk("not running\n"); |
| 2756 | //#endif |
| 2757 | break; |
| 2758 | } |
| 2759 | |
| 2760 | return result; |
| 2761 | } |
| 2762 | |
| 2763 | /* |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2764 | * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | * Purpose : reset a command on this host/reset this host |
| 2766 | * Params : SCpnt - command causing reset |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2767 | * Returns : one of SCSI_RESET_ macros |
| 2768 | */ |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2769 | int acornscsi_bus_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2771 | AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; |
| 2772 | struct scsi_cmnd *SCptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | |
| 2774 | host->stats.resets += 1; |
| 2775 | |
| 2776 | #if (DEBUG & DEBUG_RESET) |
| 2777 | { |
| 2778 | int asr, ssr; |
| 2779 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2780 | asr = sbic_arm_read(host, SBIC_ASR); |
| 2781 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | |
| 2783 | printk(KERN_WARNING "acornscsi_reset: "); |
| 2784 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 2785 | acornscsi_dumplog(host, SCpnt->device->id); |
| 2786 | } |
| 2787 | #endif |
| 2788 | |
| 2789 | acornscsi_dma_stop(host); |
| 2790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | /* |
| 2792 | * do hard reset. This resets all devices on this host, and so we |
| 2793 | * must set the reset status on all commands. |
| 2794 | */ |
| 2795 | acornscsi_resetcard(host); |
| 2796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2798 | ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2800 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | } |
| 2802 | |
| 2803 | /*============================================================================================== |
| 2804 | * initialisation & miscellaneous support |
| 2805 | */ |
| 2806 | |
| 2807 | /* |
| 2808 | * Function: char *acornscsi_info(struct Scsi_Host *host) |
| 2809 | * Purpose : return a string describing this interface |
| 2810 | * Params : host - host to give information on |
| 2811 | * Returns : a constant string |
| 2812 | */ |
| 2813 | const |
| 2814 | char *acornscsi_info(struct Scsi_Host *host) |
| 2815 | { |
| 2816 | static char string[100], *p; |
| 2817 | |
| 2818 | p = string; |
| 2819 | |
| 2820 | p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" |
| 2821 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 2822 | " SYNC" |
| 2823 | #endif |
| 2824 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 2825 | " TAG" |
| 2826 | #endif |
| 2827 | #ifdef CONFIG_SCSI_ACORNSCSI_LINK |
| 2828 | " LINK" |
| 2829 | #endif |
| 2830 | #if (DEBUG & DEBUG_NO_WRITE) |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 2831 | " NOWRITE (" __stringify(NO_WRITE) ")" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | #endif |
| 2833 | , host->hostt->name, host->io_port, host->irq, |
| 2834 | VER_MAJOR, VER_MINOR, VER_PATCH); |
| 2835 | return string; |
| 2836 | } |
| 2837 | |
| 2838 | int acornscsi_proc_info(struct Scsi_Host *instance, char *buffer, char **start, off_t offset, |
| 2839 | int length, int inout) |
| 2840 | { |
| 2841 | int pos, begin = 0, devidx; |
Christoph Hellwig | f64a181 | 2005-10-31 18:32:08 +0100 | [diff] [blame] | 2842 | struct scsi_device *scd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | AS_Host *host; |
| 2844 | char *p = buffer; |
| 2845 | |
| 2846 | if (inout == 1) |
| 2847 | return -EINVAL; |
| 2848 | |
| 2849 | host = (AS_Host *)instance->hostdata; |
| 2850 | |
| 2851 | p += sprintf(p, "AcornSCSI driver v%d.%d.%d" |
| 2852 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 2853 | " SYNC" |
| 2854 | #endif |
| 2855 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 2856 | " TAG" |
| 2857 | #endif |
| 2858 | #ifdef CONFIG_SCSI_ACORNSCSI_LINK |
| 2859 | " LINK" |
| 2860 | #endif |
| 2861 | #if (DEBUG & DEBUG_NO_WRITE) |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 2862 | " NOWRITE (" __stringify(NO_WRITE) ")" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | #endif |
| 2864 | "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); |
| 2865 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2866 | p += sprintf(p, "SBIC: WD33C93A Address: %p IRQ : %d\n", |
| 2867 | host->base + SBIC_REGIDX, host->scsi.irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2868 | #ifdef USE_DMAC |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2869 | p += sprintf(p, "DMAC: uPC71071 Address: %p IRQ : %d\n\n", |
| 2870 | host->base + DMAC_OFFSET, host->scsi.irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | #endif |
| 2872 | |
| 2873 | p += sprintf(p, "Statistics:\n" |
| 2874 | "Queued commands: %-10u Issued commands: %-10u\n" |
| 2875 | "Done commands : %-10u Reads : %-10u\n" |
| 2876 | "Writes : %-10u Others : %-10u\n" |
| 2877 | "Disconnects : %-10u Aborts : %-10u\n" |
| 2878 | "Resets : %-10u\n\nLast phases:", |
| 2879 | host->stats.queues, host->stats.removes, |
| 2880 | host->stats.fins, host->stats.reads, |
| 2881 | host->stats.writes, host->stats.miscs, |
| 2882 | host->stats.disconnects, host->stats.aborts, |
| 2883 | host->stats.resets); |
| 2884 | |
| 2885 | for (devidx = 0; devidx < 9; devidx ++) { |
| 2886 | unsigned int statptr, prev; |
| 2887 | |
| 2888 | p += sprintf(p, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); |
| 2889 | statptr = host->status_ptr[devidx] - 10; |
| 2890 | |
| 2891 | if ((signed int)statptr < 0) |
| 2892 | statptr += STATUS_BUFFER_SIZE; |
| 2893 | |
| 2894 | prev = host->status[devidx][statptr].when; |
| 2895 | |
| 2896 | for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { |
| 2897 | if (host->status[devidx][statptr].when) { |
| 2898 | p += sprintf(p, "%c%02X:%02X+%2ld", |
| 2899 | host->status[devidx][statptr].irq ? '-' : ' ', |
| 2900 | host->status[devidx][statptr].ph, |
| 2901 | host->status[devidx][statptr].ssr, |
| 2902 | (host->status[devidx][statptr].when - prev) < 100 ? |
| 2903 | (host->status[devidx][statptr].when - prev) : 99); |
| 2904 | prev = host->status[devidx][statptr].when; |
| 2905 | } |
| 2906 | } |
| 2907 | } |
| 2908 | |
| 2909 | p += sprintf(p, "\nAttached devices:\n"); |
| 2910 | |
| 2911 | shost_for_each_device(scd, instance) { |
| 2912 | p += sprintf(p, "Device/Lun TaggedQ Sync\n"); |
| 2913 | p += sprintf(p, " %d/%d ", scd->id, scd->lun); |
| 2914 | if (scd->tagged_supported) |
| 2915 | p += sprintf(p, "%3sabled(%3d) ", |
| 2916 | scd->simple_tags ? "en" : "dis", |
| 2917 | scd->current_tag); |
| 2918 | else |
| 2919 | p += sprintf(p, "unsupported "); |
| 2920 | |
| 2921 | if (host->device[scd->id].sync_xfer & 15) |
| 2922 | p += sprintf(p, "offset %d, %d ns\n", |
| 2923 | host->device[scd->id].sync_xfer & 15, |
| 2924 | acornscsi_getperiod(host->device[scd->id].sync_xfer)); |
| 2925 | else |
| 2926 | p += sprintf(p, "async\n"); |
| 2927 | |
| 2928 | pos = p - buffer; |
| 2929 | if (pos + begin < offset) { |
| 2930 | begin += pos; |
| 2931 | p = buffer; |
| 2932 | } |
| 2933 | pos = p - buffer; |
| 2934 | if (pos + begin > offset + length) { |
| 2935 | scsi_device_put(scd); |
| 2936 | break; |
| 2937 | } |
| 2938 | } |
| 2939 | |
| 2940 | pos = p - buffer; |
| 2941 | |
| 2942 | *start = buffer + (offset - begin); |
| 2943 | pos -= offset - begin; |
| 2944 | |
| 2945 | if (pos > length) |
| 2946 | pos = length; |
| 2947 | |
| 2948 | return pos; |
| 2949 | } |
| 2950 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 2951 | static struct scsi_host_template acornscsi_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | .module = THIS_MODULE, |
| 2953 | .proc_info = acornscsi_proc_info, |
| 2954 | .name = "AcornSCSI", |
| 2955 | .info = acornscsi_info, |
| 2956 | .queuecommand = acornscsi_queuecmd, |
Russell King | 324b933 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2957 | .eh_abort_handler = acornscsi_abort, |
| 2958 | .eh_bus_reset_handler = acornscsi_bus_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | .can_queue = 16, |
| 2960 | .this_id = 7, |
| 2961 | .sg_tablesize = SG_ALL, |
| 2962 | .cmd_per_lun = 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2963 | .use_clustering = DISABLE_CLUSTERING, |
| 2964 | .proc_name = "acornscsi", |
| 2965 | }; |
| 2966 | |
| 2967 | static int __devinit |
| 2968 | acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) |
| 2969 | { |
| 2970 | struct Scsi_Host *host; |
| 2971 | AS_Host *ashost; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2972 | int ret; |
| 2973 | |
| 2974 | ret = ecard_request_resources(ec); |
| 2975 | if (ret) |
| 2976 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | |
| 2978 | host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2979 | if (!host) { |
| 2980 | ret = -ENOMEM; |
| 2981 | goto out_release; |
| 2982 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | |
| 2984 | ashost = (AS_Host *)host->hostdata; |
| 2985 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2986 | ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); |
| 2987 | ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); |
| 2988 | if (!ashost->base || !ashost->fast) |
| 2989 | goto out_put; |
| 2990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | host->irq = ec->irq; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2992 | ashost->host = host; |
| 2993 | ashost->scsi.irq = host->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2995 | ec->irqaddr = ashost->fast + INT_REG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2996 | ec->irqmask = 0x0a; |
| 2997 | |
Thomas Gleixner | 1d6f359 | 2006-07-01 19:29:42 -0700 | [diff] [blame] | 2998 | ret = request_irq(host->irq, acornscsi_intr, IRQF_DISABLED, "acornscsi", ashost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2999 | if (ret) { |
| 3000 | printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", |
| 3001 | host->host_no, ashost->scsi.irq, ret); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3002 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | } |
| 3004 | |
| 3005 | memset(&ashost->stats, 0, sizeof (ashost->stats)); |
| 3006 | queue_initialise(&ashost->queues.issue); |
| 3007 | queue_initialise(&ashost->queues.disconnected); |
| 3008 | msgqueue_initialise(&ashost->scsi.msgs); |
| 3009 | |
| 3010 | acornscsi_resetcard(ashost); |
| 3011 | |
| 3012 | ret = scsi_add_host(host, &ec->dev); |
| 3013 | if (ret) |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3014 | goto out_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3015 | |
| 3016 | scsi_scan_host(host); |
| 3017 | goto out; |
| 3018 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3019 | out_irq: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3020 | free_irq(host->irq, ashost); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3021 | msgqueue_free(&ashost->scsi.msgs); |
| 3022 | queue_free(&ashost->queues.disconnected); |
| 3023 | queue_free(&ashost->queues.issue); |
| 3024 | out_put: |
| 3025 | ecardm_iounmap(ec, ashost->fast); |
| 3026 | ecardm_iounmap(ec, ashost->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | scsi_host_put(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3028 | out_release: |
| 3029 | ecard_release_resources(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | out: |
| 3031 | return ret; |
| 3032 | } |
| 3033 | |
| 3034 | static void __devexit acornscsi_remove(struct expansion_card *ec) |
| 3035 | { |
| 3036 | struct Scsi_Host *host = ecard_get_drvdata(ec); |
| 3037 | AS_Host *ashost = (AS_Host *)host->hostdata; |
| 3038 | |
| 3039 | ecard_set_drvdata(ec, NULL); |
| 3040 | scsi_remove_host(host); |
| 3041 | |
| 3042 | /* |
| 3043 | * Put card into RESET state |
| 3044 | */ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3045 | writeb(0x80, ashost->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3046 | |
| 3047 | free_irq(host->irq, ashost); |
| 3048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3049 | msgqueue_free(&ashost->scsi.msgs); |
| 3050 | queue_free(&ashost->queues.disconnected); |
| 3051 | queue_free(&ashost->queues.issue); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3052 | ecardm_iounmap(ec, ashost->fast); |
| 3053 | ecardm_iounmap(ec, ashost->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3054 | scsi_host_put(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 3055 | ecard_release_resources(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3056 | } |
| 3057 | |
| 3058 | static const struct ecard_id acornscsi_cids[] = { |
| 3059 | { MANU_ACORN, PROD_ACORN_SCSI }, |
| 3060 | { 0xffff, 0xffff }, |
| 3061 | }; |
| 3062 | |
| 3063 | static struct ecard_driver acornscsi_driver = { |
| 3064 | .probe = acornscsi_probe, |
| 3065 | .remove = __devexit_p(acornscsi_remove), |
| 3066 | .id_table = acornscsi_cids, |
| 3067 | .drv = { |
| 3068 | .name = "acornscsi", |
| 3069 | }, |
| 3070 | }; |
| 3071 | |
| 3072 | static int __init acornscsi_init(void) |
| 3073 | { |
| 3074 | return ecard_register_driver(&acornscsi_driver); |
| 3075 | } |
| 3076 | |
| 3077 | static void __exit acornscsi_exit(void) |
| 3078 | { |
| 3079 | ecard_remove_driver(&acornscsi_driver); |
| 3080 | } |
| 3081 | |
| 3082 | module_init(acornscsi_init); |
| 3083 | module_exit(acornscsi_exit); |
| 3084 | |
| 3085 | MODULE_AUTHOR("Russell King"); |
| 3086 | MODULE_DESCRIPTION("AcornSCSI driver"); |
| 3087 | MODULE_LICENSE("GPL"); |