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 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | * SCSI-II Synchronous transfer support. |
| 66 | * |
| 67 | * Tried and tested... |
| 68 | * |
| 69 | * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) |
| 70 | * SDTR_PERIOD - period of REQ signal (min=125, max=1020) |
| 71 | * DEFAULT_PERIOD - default REQ period. |
| 72 | */ |
| 73 | #define SDTR_SIZE 12 |
| 74 | #define SDTR_PERIOD 125 |
| 75 | #define DEFAULT_PERIOD 500 |
| 76 | |
| 77 | /* |
| 78 | * Debugging information |
| 79 | * |
| 80 | * DEBUG - bit mask from list above |
| 81 | * DEBUG_TARGET - is defined to the target number if you want to debug |
| 82 | * a specific target. [only recon/write/dma]. |
| 83 | */ |
| 84 | #define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) |
| 85 | /* only allow writing to SCSI device 0 */ |
| 86 | #define NO_WRITE 0xFE |
| 87 | /*#define DEBUG_TARGET 2*/ |
| 88 | /* |
| 89 | * Select timeout time (in 10ms units) |
| 90 | * |
| 91 | * This is the timeout used between the start of selection and the WD33C93 |
| 92 | * chip deciding that the device isn't responding. |
| 93 | */ |
| 94 | #define TIMEOUT_TIME 10 |
| 95 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 96 | * Define this if you want to have verbose explanation of SCSI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | * status/messages. |
| 98 | */ |
| 99 | #undef CONFIG_ACORNSCSI_CONSTANTS |
| 100 | /* |
| 101 | * Define this if you want to use the on board DMAC [don't remove this option] |
| 102 | * If not set, then use PIO mode (not currently supported). |
| 103 | */ |
| 104 | #define USE_DMAC |
| 105 | |
| 106 | /* |
| 107 | * ==================================================================================== |
| 108 | */ |
| 109 | |
| 110 | #ifdef DEBUG_TARGET |
| 111 | #define DBG(cmd,xxx...) \ |
| 112 | if (cmd->device->id == DEBUG_TARGET) { \ |
| 113 | xxx; \ |
| 114 | } |
| 115 | #else |
| 116 | #define DBG(cmd,xxx...) xxx |
| 117 | #endif |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #include <linux/module.h> |
| 120 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | #include <linux/string.h> |
| 122 | #include <linux/signal.h> |
| 123 | #include <linux/errno.h> |
| 124 | #include <linux/proc_fs.h> |
| 125 | #include <linux/ioport.h> |
| 126 | #include <linux/blkdev.h> |
| 127 | #include <linux/delay.h> |
| 128 | #include <linux/interrupt.h> |
| 129 | #include <linux/init.h> |
| 130 | #include <linux/bitops.h> |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 131 | #include <linux/stringify.h> |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 132 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | #include <asm/ecard.h> |
| 135 | |
| 136 | #include "../scsi.h" |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 137 | #include <scsi/scsi_dbg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | #include <scsi/scsi_host.h> |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 139 | #include <scsi/scsi_transport_spi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | #include "acornscsi.h" |
| 141 | #include "msgqueue.h" |
| 142 | #include "scsi.h" |
| 143 | |
| 144 | #include <scsi/scsicam.h> |
| 145 | |
| 146 | #define VER_MAJOR 2 |
| 147 | #define VER_MINOR 0 |
| 148 | #define VER_PATCH 6 |
| 149 | |
| 150 | #ifndef ABORT_TAG |
| 151 | #define ABORT_TAG 0xd |
| 152 | #else |
| 153 | #error "Yippee! ABORT TAG is now defined! Remove this error!" |
| 154 | #endif |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | #ifdef USE_DMAC |
| 157 | /* |
| 158 | * DMAC setup parameters |
| 159 | */ |
| 160 | #define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) |
| 161 | #define INIT_DEVCON1 (DEVCON1_BHLD) |
| 162 | #define DMAC_READ (MODECON_READ) |
| 163 | #define DMAC_WRITE (MODECON_WRITE) |
| 164 | #define INIT_SBICDMA (CTRL_DMABURST) |
| 165 | |
| 166 | #define scsi_xferred have_data_in |
| 167 | |
| 168 | /* |
| 169 | * Size of on-board DMA buffer |
| 170 | */ |
| 171 | #define DMAC_BUFFER_SIZE 65536 |
| 172 | #endif |
| 173 | |
| 174 | #define STATUS_BUFFER_TO_PRINT 24 |
| 175 | |
| 176 | unsigned int sdtr_period = SDTR_PERIOD; |
| 177 | unsigned int sdtr_size = SDTR_SIZE; |
| 178 | |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 179 | static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, |
| 180 | unsigned int result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | static int acornscsi_reconnect_finish(AS_Host *host); |
| 182 | static void acornscsi_dma_cleanup(AS_Host *host); |
| 183 | static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); |
| 184 | |
| 185 | /* ==================================================================================== |
| 186 | * Miscellaneous |
| 187 | */ |
| 188 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 189 | /* Offsets from MEMC base */ |
| 190 | #define SBIC_REGIDX 0x2000 |
| 191 | #define SBIC_REGVAL 0x2004 |
| 192 | #define DMAC_OFFSET 0x3000 |
| 193 | |
| 194 | /* Offsets from FAST IOC base */ |
| 195 | #define INT_REG 0x2000 |
| 196 | #define PAGE_REG 0x3000 |
| 197 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 198 | 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] | 199 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 200 | writeb(reg, host->base + SBIC_REGIDX); |
| 201 | writeb(value, host->base + SBIC_REGVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 204 | static inline int sbic_arm_read(AS_Host *host, unsigned int reg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
| 206 | if(reg == SBIC_ASR) |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 207 | return readl(host->base + SBIC_REGIDX) & 255; |
| 208 | writeb(reg, host->base + SBIC_REGIDX); |
| 209 | return readl(host->base + SBIC_REGVAL) & 255; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } |
| 211 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 212 | #define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL) |
| 213 | #define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | #ifdef USE_DMAC |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 216 | #define dmac_read(host,reg) \ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 217 | readb((host)->base + DMAC_OFFSET + ((reg) << 2)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 219 | #define dmac_write(host,reg,value) \ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 220 | ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 222 | #define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 224 | static inline unsigned int dmac_address(AS_Host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 226 | return dmac_read(host, DMAC_TXADRHI) << 16 | |
| 227 | dmac_read(host, DMAC_TXADRMD) << 8 | |
| 228 | dmac_read(host, DMAC_TXADRLO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | static |
| 232 | void acornscsi_dumpdma(AS_Host *host, char *where) |
| 233 | { |
| 234 | unsigned int mode, addr, len; |
| 235 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 236 | mode = dmac_read(host, DMAC_MODECON); |
| 237 | addr = dmac_address(host); |
| 238 | len = dmac_read(host, DMAC_TXCNTHI) << 8 | |
| 239 | dmac_read(host, DMAC_TXCNTLO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", |
| 242 | host->host->host_no, where, |
| 243 | mode, addr, (len + 1) & 0xffff, |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 244 | dmac_read(host, DMAC_MASKREG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | printk("DMA @%06x, ", host->dma.start_addr); |
| 247 | printk("BH @%p +%04x, ", host->scsi.SCp.ptr, |
| 248 | host->scsi.SCp.this_residual); |
| 249 | printk("DT @+%04x ST @+%04x", host->dma.transferred, |
| 250 | host->scsi.SCp.scsi_xferred); |
| 251 | printk("\n"); |
| 252 | } |
| 253 | #endif |
| 254 | |
| 255 | static |
| 256 | unsigned long acornscsi_sbic_xfcount(AS_Host *host) |
| 257 | { |
| 258 | unsigned long length; |
| 259 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 260 | length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16; |
| 261 | length |= sbic_arm_readnext(host) << 8; |
| 262 | length |= sbic_arm_readnext(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
| 264 | return length; |
| 265 | } |
| 266 | |
| 267 | static int |
| 268 | acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) |
| 269 | { |
| 270 | int asr; |
| 271 | |
| 272 | do { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 273 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
| 275 | if ((asr & stat_mask) == stat) |
| 276 | return 0; |
| 277 | |
| 278 | udelay(1); |
| 279 | } while (--timeout); |
| 280 | |
| 281 | printk("scsi%d: timeout while %s\n", host->host->host_no, msg); |
| 282 | |
| 283 | return -1; |
| 284 | } |
| 285 | |
| 286 | static |
| 287 | int acornscsi_sbic_issuecmd(AS_Host *host, int command) |
| 288 | { |
| 289 | if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) |
| 290 | return -1; |
| 291 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 292 | sbic_arm_write(host, SBIC_CMND, command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | acornscsi_csdelay(unsigned int cs) |
| 299 | { |
| 300 | unsigned long target_jiffies, flags; |
| 301 | |
| 302 | target_jiffies = jiffies + 1 + cs * HZ / 100; |
| 303 | |
| 304 | local_save_flags(flags); |
| 305 | local_irq_enable(); |
| 306 | |
| 307 | while (time_before(jiffies, target_jiffies)) barrier(); |
| 308 | |
| 309 | local_irq_restore(flags); |
| 310 | } |
| 311 | |
| 312 | static |
| 313 | void acornscsi_resetcard(AS_Host *host) |
| 314 | { |
| 315 | unsigned int i, timeout; |
| 316 | |
| 317 | /* assert reset line */ |
| 318 | host->card.page_reg = 0x80; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 319 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | /* wait 3 cs. SCSI standard says 25ms. */ |
| 322 | acornscsi_csdelay(3); |
| 323 | |
| 324 | host->card.page_reg = 0; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 325 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | /* |
| 328 | * Should get a reset from the card |
| 329 | */ |
| 330 | timeout = 1000; |
| 331 | do { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 332 | if (readb(host->fast + INT_REG) & 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | break; |
| 334 | udelay(1); |
| 335 | } while (--timeout); |
| 336 | |
| 337 | if (timeout == 0) |
| 338 | printk("scsi%d: timeout while resetting card\n", |
| 339 | host->host->host_no); |
| 340 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 341 | sbic_arm_read(host, SBIC_ASR); |
| 342 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | /* setup sbic - WD33C93A */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 345 | sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); |
| 346 | sbic_arm_write(host, SBIC_CMND, CMND_RESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | /* |
| 349 | * Command should cause a reset interrupt |
| 350 | */ |
| 351 | timeout = 1000; |
| 352 | do { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 353 | if (readb(host->fast + INT_REG) & 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | break; |
| 355 | udelay(1); |
| 356 | } while (--timeout); |
| 357 | |
| 358 | if (timeout == 0) |
| 359 | printk("scsi%d: timeout while resetting card\n", |
| 360 | host->host->host_no); |
| 361 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 362 | sbic_arm_read(host, SBIC_ASR); |
| 363 | if (sbic_arm_read(host, SBIC_SSR) != 0x01) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", |
| 365 | host->host->host_no); |
| 366 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 367 | sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); |
| 368 | sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); |
| 369 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); |
| 370 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | host->card.page_reg = 0x40; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 373 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | /* setup dmac - uPC71071 */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 376 | dmac_write(host, DMAC_INIT, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | #ifdef USE_DMAC |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 378 | dmac_write(host, DMAC_INIT, INIT_8BIT); |
| 379 | dmac_write(host, DMAC_CHANNEL, CHANNEL_0); |
| 380 | dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0); |
| 381 | dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | #endif |
| 383 | |
| 384 | host->SCpnt = NULL; |
| 385 | host->scsi.phase = PHASE_IDLE; |
| 386 | host->scsi.disconnectable = 0; |
| 387 | |
| 388 | memset(host->busyluns, 0, sizeof(host->busyluns)); |
| 389 | |
| 390 | for (i = 0; i < 8; i++) { |
| 391 | host->device[i].sync_state = SYNC_NEGOCIATE; |
| 392 | host->device[i].disconnect_ok = 1; |
| 393 | } |
| 394 | |
| 395 | /* wait 25 cs. SCSI standard says 250ms. */ |
| 396 | acornscsi_csdelay(25); |
| 397 | } |
| 398 | |
| 399 | /*============================================================================================= |
| 400 | * Utility routines (eg. debug) |
| 401 | */ |
| 402 | #ifdef CONFIG_ACORNSCSI_CONSTANTS |
| 403 | static char *acornscsi_interrupttype[] = { |
| 404 | "rst", "suc", "p/a", "3", |
| 405 | "term", "5", "6", "7", |
| 406 | "serv", "9", "a", "b", |
| 407 | "c", "d", "e", "f" |
| 408 | }; |
| 409 | |
| 410 | static signed char acornscsi_map[] = { |
| 411 | 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 412 | -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 413 | 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 414 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 415 | 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, |
| 416 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 417 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 418 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 419 | 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, |
| 420 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 421 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 422 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 423 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 424 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 425 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 426 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 |
| 427 | }; |
| 428 | |
| 429 | static char *acornscsi_interruptcode[] = { |
| 430 | /* 0 */ |
| 431 | "reset - normal mode", /* 00 */ |
| 432 | "reset - advanced mode", /* 01 */ |
| 433 | |
| 434 | /* 2 */ |
| 435 | "sel", /* 11 */ |
| 436 | "sel+xfer", /* 16 */ |
| 437 | "data-out", /* 18 */ |
| 438 | "data-in", /* 19 */ |
| 439 | "cmd", /* 1A */ |
| 440 | "stat", /* 1B */ |
| 441 | "??-out", /* 1C */ |
| 442 | "??-in", /* 1D */ |
| 443 | "msg-out", /* 1E */ |
| 444 | "msg-in", /* 1F */ |
| 445 | |
| 446 | /* 12 */ |
| 447 | "/ACK asserted", /* 20 */ |
| 448 | "save-data-ptr", /* 21 */ |
| 449 | "{re}sel", /* 22 */ |
| 450 | |
| 451 | /* 15 */ |
| 452 | "inv cmd", /* 40 */ |
| 453 | "unexpected disconnect", /* 41 */ |
| 454 | "sel timeout", /* 42 */ |
| 455 | "P err", /* 43 */ |
| 456 | "P err+ATN", /* 44 */ |
| 457 | "bad status byte", /* 47 */ |
| 458 | |
| 459 | /* 21 */ |
| 460 | "resel, no id", /* 80 */ |
| 461 | "resel", /* 81 */ |
| 462 | "discon", /* 85 */ |
| 463 | }; |
| 464 | |
| 465 | static |
| 466 | void print_scsi_status(unsigned int ssr) |
| 467 | { |
| 468 | if (acornscsi_map[ssr] != -1) |
| 469 | printk("%s:%s", |
| 470 | acornscsi_interrupttype[(ssr >> 4)], |
| 471 | acornscsi_interruptcode[acornscsi_map[ssr]]); |
| 472 | else |
| 473 | printk("%X:%X", ssr >> 4, ssr & 0x0f); |
| 474 | } |
| 475 | #endif |
| 476 | |
| 477 | static |
| 478 | void print_sbic_status(int asr, int ssr, int cmdphase) |
| 479 | { |
| 480 | #ifdef CONFIG_ACORNSCSI_CONSTANTS |
| 481 | printk("sbic: %c%c%c%c%c%c ", |
| 482 | asr & ASR_INT ? 'I' : 'i', |
| 483 | asr & ASR_LCI ? 'L' : 'l', |
| 484 | asr & ASR_BSY ? 'B' : 'b', |
| 485 | asr & ASR_CIP ? 'C' : 'c', |
| 486 | asr & ASR_PE ? 'P' : 'p', |
| 487 | asr & ASR_DBR ? 'D' : 'd'); |
| 488 | printk("scsi: "); |
| 489 | print_scsi_status(ssr); |
| 490 | printk(" ph %02X\n", cmdphase); |
| 491 | #else |
| 492 | printk("sbic: %02X scsi: %X:%X ph: %02X\n", |
| 493 | asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); |
| 494 | #endif |
| 495 | } |
| 496 | |
| 497 | static void |
| 498 | acornscsi_dumplogline(AS_Host *host, int target, int line) |
| 499 | { |
| 500 | unsigned long prev; |
| 501 | signed int ptr; |
| 502 | |
| 503 | ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; |
| 504 | if (ptr < 0) |
| 505 | ptr += STATUS_BUFFER_SIZE; |
| 506 | |
| 507 | printk("%c: %3s:", target == 8 ? 'H' : '0' + target, |
| 508 | line == 0 ? "ph" : line == 1 ? "ssr" : "int"); |
| 509 | |
| 510 | prev = host->status[target][ptr].when; |
| 511 | |
| 512 | for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { |
| 513 | unsigned long time_diff; |
| 514 | |
| 515 | if (!host->status[target][ptr].when) |
| 516 | continue; |
| 517 | |
| 518 | switch (line) { |
| 519 | case 0: |
| 520 | printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', |
| 521 | host->status[target][ptr].ph); |
| 522 | break; |
| 523 | |
| 524 | case 1: |
| 525 | printk(" %02X", host->status[target][ptr].ssr); |
| 526 | break; |
| 527 | |
| 528 | case 2: |
| 529 | time_diff = host->status[target][ptr].when - prev; |
| 530 | prev = host->status[target][ptr].when; |
| 531 | if (time_diff == 0) |
| 532 | printk("==^"); |
| 533 | else if (time_diff >= 100) |
| 534 | printk(" "); |
| 535 | else |
| 536 | printk(" %02ld", time_diff); |
| 537 | break; |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | printk("\n"); |
| 542 | } |
| 543 | |
| 544 | static |
| 545 | void acornscsi_dumplog(AS_Host *host, int target) |
| 546 | { |
| 547 | do { |
| 548 | acornscsi_dumplogline(host, target, 0); |
| 549 | acornscsi_dumplogline(host, target, 1); |
| 550 | acornscsi_dumplogline(host, target, 2); |
| 551 | |
| 552 | if (target == 8) |
| 553 | break; |
| 554 | |
| 555 | target = 8; |
| 556 | } while (1); |
| 557 | } |
| 558 | |
| 559 | static |
| 560 | char acornscsi_target(AS_Host *host) |
| 561 | { |
| 562 | if (host->SCpnt) |
| 563 | return '0' + host->SCpnt->device->id; |
| 564 | return 'H'; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * Prototype: cmdtype_t acornscsi_cmdtype(int command) |
| 569 | * Purpose : differentiate READ from WRITE from other commands |
| 570 | * Params : command - command to interpret |
| 571 | * Returns : CMD_READ - command reads data, |
| 572 | * CMD_WRITE - command writes data, |
| 573 | * CMD_MISC - everything else |
| 574 | */ |
| 575 | static inline |
| 576 | cmdtype_t acornscsi_cmdtype(int command) |
| 577 | { |
| 578 | switch (command) { |
| 579 | case WRITE_6: case WRITE_10: case WRITE_12: |
| 580 | return CMD_WRITE; |
| 581 | case READ_6: case READ_10: case READ_12: |
| 582 | return CMD_READ; |
| 583 | default: |
| 584 | return CMD_MISC; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Prototype: int acornscsi_datadirection(int command) |
| 590 | * Purpose : differentiate between commands that have a DATA IN phase |
| 591 | * and a DATA OUT phase |
| 592 | * Params : command - command to interpret |
| 593 | * Returns : DATADIR_OUT - data out phase expected |
| 594 | * DATADIR_IN - data in phase expected |
| 595 | */ |
| 596 | static |
| 597 | datadir_t acornscsi_datadirection(int command) |
| 598 | { |
| 599 | switch (command) { |
| 600 | case CHANGE_DEFINITION: case COMPARE: case COPY: |
| 601 | case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: |
| 602 | case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: |
| 603 | case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: |
| 604 | case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: |
| 605 | case WRITE_6: case WRITE_10: case WRITE_VERIFY: |
| 606 | case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: |
| 607 | case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: |
| 608 | case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: |
| 609 | case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: |
| 610 | return DATADIR_OUT; |
| 611 | default: |
| 612 | return DATADIR_IN; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * Purpose : provide values for synchronous transfers with 33C93. |
| 618 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 619 | * Modified by Russell King for 8MHz WD33C93A |
| 620 | */ |
| 621 | static struct sync_xfer_tbl { |
| 622 | unsigned int period_ns; |
| 623 | unsigned char reg_value; |
| 624 | } sync_xfer_table[] = { |
| 625 | { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, |
| 626 | { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, |
| 627 | { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } |
| 628 | }; |
| 629 | |
| 630 | /* |
| 631 | * Prototype: int acornscsi_getperiod(unsigned char syncxfer) |
| 632 | * Purpose : period for the synchronous transfer setting |
| 633 | * Params : syncxfer SYNCXFER register value |
| 634 | * Returns : period in ns. |
| 635 | */ |
| 636 | static |
| 637 | int acornscsi_getperiod(unsigned char syncxfer) |
| 638 | { |
| 639 | int i; |
| 640 | |
| 641 | syncxfer &= 0xf0; |
| 642 | if (syncxfer == 0x10) |
| 643 | syncxfer = 0; |
| 644 | |
| 645 | for (i = 1; sync_xfer_table[i].period_ns; i++) |
| 646 | if (syncxfer == sync_xfer_table[i].reg_value) |
| 647 | return sync_xfer_table[i].period_ns; |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * Prototype: int round_period(unsigned int period) |
| 653 | * Purpose : return index into above table for a required REQ period |
| 654 | * Params : period - time (ns) for REQ |
| 655 | * Returns : table index |
| 656 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 657 | */ |
| 658 | static inline |
| 659 | int round_period(unsigned int period) |
| 660 | { |
| 661 | int i; |
| 662 | |
| 663 | for (i = 1; sync_xfer_table[i].period_ns; i++) { |
| 664 | if ((period <= sync_xfer_table[i].period_ns) && |
| 665 | (period > sync_xfer_table[i - 1].period_ns)) |
| 666 | return i; |
| 667 | } |
| 668 | return 7; |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) |
| 673 | * Purpose : calculate value for 33c93s SYNC register |
| 674 | * Params : period - time (ns) for REQ |
| 675 | * offset - offset in bytes between REQ/ACK |
| 676 | * Returns : value for SYNC register |
| 677 | * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 678 | */ |
| 679 | static |
| 680 | unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) |
| 681 | { |
| 682 | return sync_xfer_table[round_period(period)].reg_value | |
| 683 | ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); |
| 684 | } |
| 685 | |
| 686 | /* ==================================================================================== |
| 687 | * Command functions |
| 688 | */ |
| 689 | /* |
| 690 | * Function: acornscsi_kick(AS_Host *host) |
| 691 | * Purpose : kick next command to interface |
| 692 | * Params : host - host to send command to |
| 693 | * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING |
| 694 | * Notes : interrupts are always disabled! |
| 695 | */ |
| 696 | static |
| 697 | intr_ret_t acornscsi_kick(AS_Host *host) |
| 698 | { |
| 699 | int from_queue = 0; |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 700 | struct scsi_cmnd *SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
| 702 | /* first check to see if a command is waiting to be executed */ |
| 703 | SCpnt = host->origSCpnt; |
| 704 | host->origSCpnt = NULL; |
| 705 | |
| 706 | /* retrieve next command */ |
| 707 | if (!SCpnt) { |
| 708 | SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); |
| 709 | if (!SCpnt) |
| 710 | return INTR_IDLE; |
| 711 | |
| 712 | from_queue = 1; |
| 713 | } |
| 714 | |
| 715 | if (host->scsi.disconnectable && host->SCpnt) { |
| 716 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 717 | host->scsi.disconnectable = 0; |
| 718 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 719 | DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", |
| 720 | host->host->host_no, acornscsi_target(host))); |
| 721 | #endif |
| 722 | host->SCpnt = NULL; |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * If we have an interrupt pending, then we may have been reselected. |
| 727 | * In this case, we don't want to write to the registers |
| 728 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 729 | if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { |
| 730 | sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id); |
| 731 | sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | /* |
| 735 | * claim host busy - all of these must happen atomically wrt |
| 736 | * our interrupt routine. Failure means command loss. |
| 737 | */ |
| 738 | host->scsi.phase = PHASE_CONNECTING; |
| 739 | host->SCpnt = SCpnt; |
| 740 | host->scsi.SCp = SCpnt->SCp; |
| 741 | host->dma.xfer_setup = 0; |
| 742 | host->dma.xfer_required = 0; |
| 743 | host->dma.xfer_done = 0; |
| 744 | |
| 745 | #if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) |
| 746 | DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", |
| 747 | host->host->host_no, '0' + SCpnt->device->id, |
| 748 | SCpnt->cmnd[0])); |
| 749 | #endif |
| 750 | |
| 751 | if (from_queue) { |
| 752 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 753 | /* |
| 754 | * tagged queueing - allocate a new tag to this command |
| 755 | */ |
| 756 | if (SCpnt->device->simple_tags) { |
| 757 | SCpnt->device->current_tag += 1; |
| 758 | if (SCpnt->device->current_tag == 0) |
| 759 | SCpnt->device->current_tag = 1; |
| 760 | SCpnt->tag = SCpnt->device->current_tag; |
| 761 | } else |
| 762 | #endif |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame^] | 763 | set_bit(SCpnt->device->id * 8 + |
| 764 | (u8)(SCpnt->device->lun & 0x07), host->busyluns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | host->stats.removes += 1; |
| 767 | |
| 768 | switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { |
| 769 | case CMD_WRITE: |
| 770 | host->stats.writes += 1; |
| 771 | break; |
| 772 | case CMD_READ: |
| 773 | host->stats.reads += 1; |
| 774 | break; |
| 775 | case CMD_MISC: |
| 776 | host->stats.miscs += 1; |
| 777 | break; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | return INTR_PROCESSING; |
| 782 | } |
| 783 | |
| 784 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 785 | * 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] | 786 | * Purpose : complete processing for command |
| 787 | * Params : host - interface that completed |
| 788 | * result - driver byte of result |
| 789 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 790 | static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, |
| 791 | unsigned int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 793 | struct scsi_cmnd *SCpnt = *SCpntp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
| 795 | /* clean up */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 796 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | host->stats.fins += 1; |
| 799 | |
| 800 | if (SCpnt) { |
| 801 | *SCpntp = NULL; |
| 802 | |
| 803 | acornscsi_dma_cleanup(host); |
| 804 | |
| 805 | SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; |
| 806 | |
| 807 | /* |
| 808 | * In theory, this should not happen. In practice, it seems to. |
| 809 | * Only trigger an error if the device attempts to report all happy |
| 810 | * but with untransferred buffers... If we don't do something, then |
| 811 | * data loss will occur. Should we check SCpnt->underflow here? |
| 812 | * It doesn't appear to be set to something meaningful by the higher |
| 813 | * levels all the time. |
| 814 | */ |
| 815 | if (result == DID_OK) { |
| 816 | int xfer_warn = 0; |
| 817 | |
| 818 | if (SCpnt->underflow == 0) { |
| 819 | if (host->scsi.SCp.ptr && |
| 820 | acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) |
| 821 | xfer_warn = 1; |
| 822 | } else { |
| 823 | if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || |
| 824 | host->scsi.SCp.scsi_xferred != host->dma.transferred) |
| 825 | xfer_warn = 1; |
| 826 | } |
| 827 | |
| 828 | /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) |
| 829 | * Targets which break data transfers into multiple |
| 830 | * connections shall end each successful connection |
| 831 | * (except possibly the last) with a SAVE DATA |
| 832 | * POINTER - DISCONNECT message sequence. |
| 833 | * |
| 834 | * This makes it difficult to ensure that a transfer has |
| 835 | * completed. If we reach the end of a transfer during |
| 836 | * the command, then we can only have finished the transfer. |
| 837 | * therefore, if we seem to have some data remaining, this |
| 838 | * is not a problem. |
| 839 | */ |
| 840 | if (host->dma.xfer_done) |
| 841 | xfer_warn = 0; |
| 842 | |
| 843 | if (xfer_warn) { |
| 844 | switch (status_byte(SCpnt->result)) { |
| 845 | case CHECK_CONDITION: |
| 846 | case COMMAND_TERMINATED: |
| 847 | case BUSY: |
| 848 | case QUEUE_FULL: |
| 849 | case RESERVATION_CONFLICT: |
| 850 | break; |
| 851 | |
| 852 | default: |
| 853 | printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=", |
| 854 | host->host->host_no, SCpnt->result); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 855 | __scsi_print_command(SCpnt->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | acornscsi_dumpdma(host, "done"); |
| 857 | acornscsi_dumplog(host, SCpnt->device->id); |
| 858 | SCpnt->result &= 0xffff; |
| 859 | SCpnt->result |= DID_ERROR << 16; |
| 860 | } |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | if (!SCpnt->scsi_done) |
| 865 | panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); |
| 866 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame^] | 867 | clear_bit(SCpnt->device->id * 8 + |
| 868 | (u8)(SCpnt->device->lun & 0x7), host->busyluns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | SCpnt->scsi_done(SCpnt); |
| 871 | } else |
| 872 | printk("scsi%d: null command in acornscsi_done", host->host->host_no); |
| 873 | |
| 874 | host->scsi.phase = PHASE_IDLE; |
| 875 | } |
| 876 | |
| 877 | /* ==================================================================================== |
| 878 | * DMA routines |
| 879 | */ |
| 880 | /* |
| 881 | * Purpose : update SCSI Data Pointer |
| 882 | * Notes : this will only be one SG entry or less |
| 883 | */ |
| 884 | static |
Christoph Hellwig | 0a04137 | 2005-10-31 18:31:56 +0100 | [diff] [blame] | 885 | 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] | 886 | { |
| 887 | SCp->ptr += length; |
| 888 | SCp->this_residual -= length; |
| 889 | |
| 890 | if (SCp->this_residual == 0 && next_SCp(SCp) == 0) |
| 891 | host->dma.xfer_done = 1; |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, |
| 896 | * unsigned int start_addr, unsigned int length) |
| 897 | * Purpose : read data from DMA RAM |
| 898 | * Params : host - host to transfer from |
| 899 | * ptr - DRAM address |
| 900 | * start_addr - host mem address |
| 901 | * length - number of bytes to transfer |
| 902 | * Notes : this will only be one SG entry or less |
| 903 | */ |
| 904 | static |
| 905 | void acornscsi_data_read(AS_Host *host, char *ptr, |
| 906 | unsigned int start_addr, unsigned int length) |
| 907 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 908 | extern void __acornscsi_in(void __iomem *, char *buf, int len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | unsigned int page, offset, len = length; |
| 910 | |
| 911 | page = (start_addr >> 12); |
| 912 | offset = start_addr & ((1 << 12) - 1); |
| 913 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 914 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | while (len > 0) { |
| 917 | unsigned int this_len; |
| 918 | |
| 919 | if (len + offset > (1 << 12)) |
| 920 | this_len = (1 << 12) - offset; |
| 921 | else |
| 922 | this_len = len; |
| 923 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 924 | __acornscsi_in(host->base + (offset << 1), ptr, this_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | offset += this_len; |
| 927 | ptr += this_len; |
| 928 | len -= this_len; |
| 929 | |
| 930 | if (offset == (1 << 12)) { |
| 931 | offset = 0; |
| 932 | page ++; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 933 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } |
| 935 | } |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 936 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | /* |
| 940 | * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, |
| 941 | * unsigned int start_addr, unsigned int length) |
| 942 | * Purpose : write data to DMA RAM |
| 943 | * Params : host - host to transfer from |
| 944 | * ptr - DRAM address |
| 945 | * start_addr - host mem address |
| 946 | * length - number of bytes to transfer |
| 947 | * Notes : this will only be one SG entry or less |
| 948 | */ |
| 949 | static |
| 950 | void acornscsi_data_write(AS_Host *host, char *ptr, |
| 951 | unsigned int start_addr, unsigned int length) |
| 952 | { |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 953 | extern void __acornscsi_out(void __iomem *, char *buf, int len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | unsigned int page, offset, len = length; |
| 955 | |
| 956 | page = (start_addr >> 12); |
| 957 | offset = start_addr & ((1 << 12) - 1); |
| 958 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 959 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
| 961 | while (len > 0) { |
| 962 | unsigned int this_len; |
| 963 | |
| 964 | if (len + offset > (1 << 12)) |
| 965 | this_len = (1 << 12) - offset; |
| 966 | else |
| 967 | this_len = len; |
| 968 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 969 | __acornscsi_out(host->base + (offset << 1), ptr, this_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
| 971 | offset += this_len; |
| 972 | ptr += this_len; |
| 973 | len -= this_len; |
| 974 | |
| 975 | if (offset == (1 << 12)) { |
| 976 | offset = 0; |
| 977 | page ++; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 978 | writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | } |
| 980 | } |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 981 | writeb(host->card.page_reg, host->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | /* ========================================================================================= |
| 985 | * On-board DMA routines |
| 986 | */ |
| 987 | #ifdef USE_DMAC |
| 988 | /* |
| 989 | * Prototype: void acornscsi_dmastop(AS_Host *host) |
| 990 | * Purpose : stop all DMA |
| 991 | * Params : host - host on which to stop DMA |
| 992 | * Notes : This is called when leaving DATA IN/OUT phase, |
| 993 | * or when interface is RESET |
| 994 | */ |
| 995 | static inline |
| 996 | void acornscsi_dma_stop(AS_Host *host) |
| 997 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 998 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 999 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
| 1001 | #if (DEBUG & DEBUG_DMA) |
| 1002 | DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); |
| 1003 | #endif |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) |
| 1008 | * Purpose : setup DMA controller for data transfer |
| 1009 | * Params : host - host to setup |
| 1010 | * direction - data transfer direction |
| 1011 | * Notes : This is called when entering DATA I/O phase, not |
| 1012 | * while we're in a DATA I/O phase |
| 1013 | */ |
| 1014 | static |
| 1015 | void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) |
| 1016 | { |
| 1017 | unsigned int address, length, mode; |
| 1018 | |
| 1019 | host->dma.direction = direction; |
| 1020 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1021 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
| 1023 | if (direction == DMA_OUT) { |
| 1024 | #if (DEBUG & DEBUG_NO_WRITE) |
| 1025 | if (NO_WRITE & (1 << host->SCpnt->device->id)) { |
| 1026 | printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", |
| 1027 | host->host->host_no, acornscsi_target(host)); |
| 1028 | return; |
| 1029 | } |
| 1030 | #endif |
| 1031 | mode = DMAC_WRITE; |
| 1032 | } else |
| 1033 | mode = DMAC_READ; |
| 1034 | |
| 1035 | /* |
| 1036 | * Allocate some buffer space, limited to half the buffer size |
| 1037 | */ |
| 1038 | length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); |
| 1039 | if (length) { |
| 1040 | host->dma.start_addr = address = host->dma.free_addr; |
| 1041 | host->dma.free_addr = (host->dma.free_addr + length) & |
| 1042 | (DMAC_BUFFER_SIZE - 1); |
| 1043 | |
| 1044 | /* |
| 1045 | * Transfer data to DMA memory |
| 1046 | */ |
| 1047 | if (direction == DMA_OUT) |
| 1048 | acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, |
| 1049 | length); |
| 1050 | |
| 1051 | length -= 1; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1052 | dmac_write(host, DMAC_TXCNTLO, length); |
| 1053 | dmac_write(host, DMAC_TXCNTHI, length >> 8); |
| 1054 | dmac_write(host, DMAC_TXADRLO, address); |
| 1055 | dmac_write(host, DMAC_TXADRMD, address >> 8); |
| 1056 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1057 | dmac_write(host, DMAC_MODECON, mode); |
| 1058 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
| 1060 | #if (DEBUG & DEBUG_DMA) |
| 1061 | DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); |
| 1062 | #endif |
| 1063 | host->dma.xfer_setup = 1; |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | /* |
| 1068 | * Function: void acornscsi_dma_cleanup(AS_Host *host) |
| 1069 | * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct |
| 1070 | * Params : host - host to finish |
| 1071 | * Notes : This is called when a command is: |
| 1072 | * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT |
| 1073 | * : This must not return until all transfers are completed. |
| 1074 | */ |
| 1075 | static |
| 1076 | void acornscsi_dma_cleanup(AS_Host *host) |
| 1077 | { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1078 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 1079 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
| 1081 | /* |
| 1082 | * Check for a pending transfer |
| 1083 | */ |
| 1084 | if (host->dma.xfer_required) { |
| 1085 | host->dma.xfer_required = 0; |
| 1086 | if (host->dma.direction == DMA_IN) |
| 1087 | acornscsi_data_read(host, host->dma.xfer_ptr, |
| 1088 | host->dma.xfer_start, host->dma.xfer_length); |
| 1089 | } |
| 1090 | |
| 1091 | /* |
| 1092 | * Has a transfer been setup? |
| 1093 | */ |
| 1094 | if (host->dma.xfer_setup) { |
| 1095 | unsigned int transferred; |
| 1096 | |
| 1097 | host->dma.xfer_setup = 0; |
| 1098 | |
| 1099 | #if (DEBUG & DEBUG_DMA) |
| 1100 | DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); |
| 1101 | #endif |
| 1102 | |
| 1103 | /* |
| 1104 | * Calculate number of bytes transferred from DMA. |
| 1105 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1106 | transferred = dmac_address(host) - host->dma.start_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | host->dma.transferred += transferred; |
| 1108 | |
| 1109 | if (host->dma.direction == DMA_IN) |
| 1110 | acornscsi_data_read(host, host->scsi.SCp.ptr, |
| 1111 | host->dma.start_addr, transferred); |
| 1112 | |
| 1113 | /* |
| 1114 | * Update SCSI pointers |
| 1115 | */ |
| 1116 | acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); |
| 1117 | #if (DEBUG & DEBUG_DMA) |
| 1118 | DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); |
| 1119 | #endif |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | /* |
| 1124 | * Function: void acornscsi_dmacintr(AS_Host *host) |
| 1125 | * Purpose : handle interrupts from DMAC device |
| 1126 | * Params : host - host to process |
| 1127 | * Notes : If reading, we schedule the read to main memory & |
| 1128 | * allow the transfer to continue. |
| 1129 | * : If writing, we fill the onboard DMA memory from main |
| 1130 | * memory. |
| 1131 | * : Called whenever DMAC finished it's current transfer. |
| 1132 | */ |
| 1133 | static |
| 1134 | void acornscsi_dma_intr(AS_Host *host) |
| 1135 | { |
| 1136 | unsigned int address, length, transferred; |
| 1137 | |
| 1138 | #if (DEBUG & DEBUG_DMA) |
| 1139 | DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); |
| 1140 | #endif |
| 1141 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1142 | dmac_write(host, DMAC_MASKREG, MASK_ON); |
| 1143 | dmac_clearintr(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
| 1145 | /* |
| 1146 | * Calculate amount transferred via DMA |
| 1147 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1148 | transferred = dmac_address(host) - host->dma.start_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | host->dma.transferred += transferred; |
| 1150 | |
| 1151 | /* |
| 1152 | * Schedule DMA transfer off board |
| 1153 | */ |
| 1154 | if (host->dma.direction == DMA_IN) { |
| 1155 | host->dma.xfer_start = host->dma.start_addr; |
| 1156 | host->dma.xfer_length = transferred; |
| 1157 | host->dma.xfer_ptr = host->scsi.SCp.ptr; |
| 1158 | host->dma.xfer_required = 1; |
| 1159 | } |
| 1160 | |
| 1161 | acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); |
| 1162 | |
| 1163 | /* |
| 1164 | * Allocate some buffer space, limited to half the on-board RAM size |
| 1165 | */ |
| 1166 | length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); |
| 1167 | if (length) { |
| 1168 | host->dma.start_addr = address = host->dma.free_addr; |
| 1169 | host->dma.free_addr = (host->dma.free_addr + length) & |
| 1170 | (DMAC_BUFFER_SIZE - 1); |
| 1171 | |
| 1172 | /* |
| 1173 | * Transfer data to DMA memory |
| 1174 | */ |
| 1175 | if (host->dma.direction == DMA_OUT) |
| 1176 | acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, |
| 1177 | length); |
| 1178 | |
| 1179 | length -= 1; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1180 | dmac_write(host, DMAC_TXCNTLO, length); |
| 1181 | dmac_write(host, DMAC_TXCNTHI, length >> 8); |
| 1182 | dmac_write(host, DMAC_TXADRLO, address); |
| 1183 | dmac_write(host, DMAC_TXADRMD, address >> 8); |
| 1184 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1185 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
| 1187 | #if (DEBUG & DEBUG_DMA) |
| 1188 | DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); |
| 1189 | #endif |
| 1190 | } else { |
| 1191 | host->dma.xfer_setup = 0; |
| 1192 | #if 0 |
| 1193 | /* |
| 1194 | * If the interface still wants more, then this is an error. |
| 1195 | * We give it another byte, but we also attempt to raise an |
| 1196 | * attention condition. We continue giving one byte until |
| 1197 | * the device recognises the attention. |
| 1198 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1199 | if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 1201 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1202 | dmac_write(host, DMAC_TXCNTLO, 0); |
| 1203 | dmac_write(host, DMAC_TXCNTHI, 0); |
| 1204 | dmac_write(host, DMAC_TXADRLO, 0); |
| 1205 | dmac_write(host, DMAC_TXADRMD, 0); |
| 1206 | dmac_write(host, DMAC_TXADRHI, 0); |
| 1207 | dmac_write(host, DMAC_MASKREG, MASK_OFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | #endif |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | /* |
| 1214 | * Function: void acornscsi_dma_xfer(AS_Host *host) |
| 1215 | * Purpose : transfer data between AcornSCSI and memory |
| 1216 | * Params : host - host to process |
| 1217 | */ |
| 1218 | static |
| 1219 | void acornscsi_dma_xfer(AS_Host *host) |
| 1220 | { |
| 1221 | host->dma.xfer_required = 0; |
| 1222 | |
| 1223 | if (host->dma.direction == DMA_IN) |
| 1224 | acornscsi_data_read(host, host->dma.xfer_ptr, |
| 1225 | host->dma.xfer_start, host->dma.xfer_length); |
| 1226 | } |
| 1227 | |
| 1228 | /* |
| 1229 | * Function: void acornscsi_dma_adjust(AS_Host *host) |
| 1230 | * Purpose : adjust DMA pointers & count for bytes transferred to |
| 1231 | * SBIC but not SCSI bus. |
| 1232 | * Params : host - host to adjust DMA count for |
| 1233 | */ |
| 1234 | static |
| 1235 | void acornscsi_dma_adjust(AS_Host *host) |
| 1236 | { |
| 1237 | if (host->dma.xfer_setup) { |
| 1238 | signed long transferred; |
| 1239 | #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) |
| 1240 | DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); |
| 1241 | #endif |
| 1242 | /* |
| 1243 | * Calculate correct DMA address - DMA is ahead of SCSI bus while |
| 1244 | * writing. |
| 1245 | * host->scsi.SCp.scsi_xferred is the number of bytes |
| 1246 | * actually transferred to/from the SCSI bus. |
| 1247 | * host->dma.transferred is the number of bytes transferred |
| 1248 | * over DMA since host->dma.start_addr was last set. |
| 1249 | * |
| 1250 | * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred |
| 1251 | * - host->dma.transferred |
| 1252 | */ |
| 1253 | transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; |
| 1254 | if (transferred < 0) |
| 1255 | printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", |
| 1256 | host->host->host_no, acornscsi_target(host), transferred); |
| 1257 | else if (transferred == 0) |
| 1258 | host->dma.xfer_setup = 0; |
| 1259 | else { |
| 1260 | transferred += host->dma.start_addr; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1261 | dmac_write(host, DMAC_TXADRLO, transferred); |
| 1262 | dmac_write(host, DMAC_TXADRMD, transferred >> 8); |
| 1263 | dmac_write(host, DMAC_TXADRHI, transferred >> 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | #if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) |
| 1265 | DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); |
| 1266 | #endif |
| 1267 | } |
| 1268 | } |
| 1269 | } |
| 1270 | #endif |
| 1271 | |
| 1272 | /* ========================================================================================= |
| 1273 | * Data I/O |
| 1274 | */ |
| 1275 | static int |
| 1276 | acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) |
| 1277 | { |
| 1278 | unsigned int asr, timeout = max_timeout; |
| 1279 | int my_ptr = *ptr; |
| 1280 | |
| 1281 | while (my_ptr < len) { |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1282 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
| 1284 | if (asr & ASR_DBR) { |
| 1285 | timeout = max_timeout; |
| 1286 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1287 | sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | } else if (asr & ASR_INT) |
| 1289 | break; |
| 1290 | else if (--timeout == 0) |
| 1291 | break; |
| 1292 | udelay(1); |
| 1293 | } |
| 1294 | |
| 1295 | *ptr = my_ptr; |
| 1296 | |
| 1297 | return (timeout == 0) ? -1 : 0; |
| 1298 | } |
| 1299 | |
| 1300 | /* |
| 1301 | * Function: void acornscsi_sendcommand(AS_Host *host) |
| 1302 | * Purpose : send a command to a target |
| 1303 | * Params : host - host which is connected to target |
| 1304 | */ |
| 1305 | static void |
| 1306 | acornscsi_sendcommand(AS_Host *host) |
| 1307 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 1308 | struct scsi_cmnd *SCpnt = host->SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1310 | sbic_arm_write(host, SBIC_TRANSCNTH, 0); |
| 1311 | sbic_arm_writenext(host, 0); |
| 1312 | sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
| 1314 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1315 | |
| 1316 | if (acornscsi_write_pio(host, SCpnt->cmnd, |
| 1317 | (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) |
| 1318 | printk("scsi%d: timeout while sending command\n", host->host->host_no); |
| 1319 | |
| 1320 | host->scsi.phase = PHASE_COMMAND; |
| 1321 | } |
| 1322 | |
| 1323 | static |
| 1324 | void acornscsi_sendmessage(AS_Host *host) |
| 1325 | { |
| 1326 | unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); |
| 1327 | unsigned int msgnr; |
| 1328 | struct message *msg; |
| 1329 | |
| 1330 | #if (DEBUG & DEBUG_MESSAGES) |
| 1331 | printk("scsi%d.%c: sending message ", |
| 1332 | host->host->host_no, acornscsi_target(host)); |
| 1333 | #endif |
| 1334 | |
| 1335 | switch (message_length) { |
| 1336 | case 0: |
| 1337 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1338 | |
| 1339 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); |
| 1340 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1341 | sbic_arm_write(host, SBIC_DATA, NOP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
| 1343 | host->scsi.last_message = NOP; |
| 1344 | #if (DEBUG & DEBUG_MESSAGES) |
| 1345 | printk("NOP"); |
| 1346 | #endif |
| 1347 | break; |
| 1348 | |
| 1349 | case 1: |
| 1350 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1351 | msg = msgqueue_getmsg(&host->scsi.msgs, 0); |
| 1352 | |
| 1353 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); |
| 1354 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1355 | sbic_arm_write(host, SBIC_DATA, msg->msg[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
| 1357 | host->scsi.last_message = msg->msg[0]; |
| 1358 | #if (DEBUG & DEBUG_MESSAGES) |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1359 | spi_print_msg(msg->msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | #endif |
| 1361 | break; |
| 1362 | |
| 1363 | default: |
| 1364 | /* |
| 1365 | * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) |
| 1366 | * 'When a target sends this (MESSAGE_REJECT) message, it |
| 1367 | * shall change to MESSAGE IN phase and send this message |
| 1368 | * prior to requesting additional message bytes from the |
| 1369 | * initiator. This provides an interlock so that the |
| 1370 | * initiator can determine which message byte is rejected. |
| 1371 | */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1372 | sbic_arm_write(host, SBIC_TRANSCNTH, 0); |
| 1373 | sbic_arm_writenext(host, 0); |
| 1374 | sbic_arm_writenext(host, message_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1376 | |
| 1377 | msgnr = 0; |
| 1378 | while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { |
| 1379 | unsigned int i; |
| 1380 | #if (DEBUG & DEBUG_MESSAGES) |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1381 | spi_print_msg(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | #endif |
| 1383 | i = 0; |
| 1384 | if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) |
| 1385 | printk("scsi%d: timeout while sending message\n", host->host->host_no); |
| 1386 | |
| 1387 | host->scsi.last_message = msg->msg[0]; |
| 1388 | if (msg->msg[0] == EXTENDED_MESSAGE) |
| 1389 | host->scsi.last_message |= msg->msg[2] << 8; |
| 1390 | |
| 1391 | if (i != msg->length) |
| 1392 | break; |
| 1393 | } |
| 1394 | break; |
| 1395 | } |
| 1396 | #if (DEBUG & DEBUG_MESSAGES) |
| 1397 | printk("\n"); |
| 1398 | #endif |
| 1399 | } |
| 1400 | |
| 1401 | /* |
| 1402 | * Function: void acornscsi_readstatusbyte(AS_Host *host) |
| 1403 | * Purpose : Read status byte from connected target |
| 1404 | * Params : host - host connected to target |
| 1405 | */ |
| 1406 | static |
| 1407 | void acornscsi_readstatusbyte(AS_Host *host) |
| 1408 | { |
| 1409 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); |
| 1410 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1411 | host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | } |
| 1413 | |
| 1414 | /* |
| 1415 | * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) |
| 1416 | * Purpose : Read one message byte from connected target |
| 1417 | * Params : host - host connected to target |
| 1418 | */ |
| 1419 | static |
| 1420 | unsigned char acornscsi_readmessagebyte(AS_Host *host) |
| 1421 | { |
| 1422 | unsigned char message; |
| 1423 | |
| 1424 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); |
| 1425 | |
| 1426 | acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); |
| 1427 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1428 | message = sbic_arm_read(host, SBIC_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
| 1430 | /* wait for MSGIN-XFER-PAUSED */ |
| 1431 | acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); |
| 1432 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1433 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | |
| 1435 | return message; |
| 1436 | } |
| 1437 | |
| 1438 | /* |
| 1439 | * Function: void acornscsi_message(AS_Host *host) |
| 1440 | * Purpose : Read complete message from connected target & action message |
| 1441 | * Params : host - host connected to target |
| 1442 | */ |
| 1443 | static |
| 1444 | void acornscsi_message(AS_Host *host) |
| 1445 | { |
| 1446 | unsigned char message[16]; |
| 1447 | unsigned int msgidx = 0, msglen = 1; |
| 1448 | |
| 1449 | do { |
| 1450 | message[msgidx] = acornscsi_readmessagebyte(host); |
| 1451 | |
| 1452 | switch (msgidx) { |
| 1453 | case 0: |
| 1454 | if (message[0] == EXTENDED_MESSAGE || |
| 1455 | (message[0] >= 0x20 && message[0] <= 0x2f)) |
| 1456 | msglen = 2; |
| 1457 | break; |
| 1458 | |
| 1459 | case 1: |
| 1460 | if (message[0] == EXTENDED_MESSAGE) |
| 1461 | msglen += message[msgidx]; |
| 1462 | break; |
| 1463 | } |
| 1464 | msgidx += 1; |
| 1465 | if (msgidx < msglen) { |
| 1466 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1467 | |
| 1468 | /* wait for next msg-in */ |
| 1469 | 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] | 1470 | sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | } |
| 1472 | } while (msgidx < msglen); |
| 1473 | |
| 1474 | #if (DEBUG & DEBUG_MESSAGES) |
| 1475 | printk("scsi%d.%c: message in: ", |
| 1476 | host->host->host_no, acornscsi_target(host)); |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1477 | spi_print_msg(message); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | printk("\n"); |
| 1479 | #endif |
| 1480 | |
| 1481 | if (host->scsi.phase == PHASE_RECONNECTED) { |
| 1482 | /* |
| 1483 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) |
| 1484 | * 'Whenever a target reconnects to an initiator to continue |
| 1485 | * a tagged I/O process, the SIMPLE QUEUE TAG message shall |
| 1486 | * be sent immediately following the IDENTIFY message...' |
| 1487 | */ |
| 1488 | if (message[0] == SIMPLE_QUEUE_TAG) |
| 1489 | host->scsi.reconnected.tag = message[1]; |
| 1490 | if (acornscsi_reconnect_finish(host)) |
| 1491 | host->scsi.phase = PHASE_MSGIN; |
| 1492 | } |
| 1493 | |
| 1494 | switch (message[0]) { |
| 1495 | case ABORT: |
| 1496 | case ABORT_TAG: |
| 1497 | case COMMAND_COMPLETE: |
| 1498 | if (host->scsi.phase != PHASE_STATUSIN) { |
| 1499 | printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", |
| 1500 | host->host->host_no, acornscsi_target(host)); |
| 1501 | acornscsi_dumplog(host, host->SCpnt->device->id); |
| 1502 | } |
| 1503 | host->scsi.phase = PHASE_DONE; |
| 1504 | host->scsi.SCp.Message = message[0]; |
| 1505 | break; |
| 1506 | |
| 1507 | case SAVE_POINTERS: |
| 1508 | /* |
| 1509 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) |
| 1510 | * 'The SAVE DATA POINTER message is sent from a target to |
| 1511 | * direct the initiator to copy the active data pointer to |
| 1512 | * the saved data pointer for the current I/O process. |
| 1513 | */ |
| 1514 | acornscsi_dma_cleanup(host); |
| 1515 | host->SCpnt->SCp = host->scsi.SCp; |
| 1516 | host->SCpnt->SCp.sent_command = 0; |
| 1517 | host->scsi.phase = PHASE_MSGIN; |
| 1518 | break; |
| 1519 | |
| 1520 | case RESTORE_POINTERS: |
| 1521 | /* |
| 1522 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) |
| 1523 | * 'The RESTORE POINTERS message is sent from a target to |
| 1524 | * direct the initiator to copy the most recently saved |
| 1525 | * command, data, and status pointers for the I/O process |
| 1526 | * to the corresponding active pointers. The command and |
| 1527 | * status pointers shall be restored to the beginning of |
| 1528 | * the present command and status areas.' |
| 1529 | */ |
| 1530 | acornscsi_dma_cleanup(host); |
| 1531 | host->scsi.SCp = host->SCpnt->SCp; |
| 1532 | host->scsi.phase = PHASE_MSGIN; |
| 1533 | break; |
| 1534 | |
| 1535 | case DISCONNECT: |
| 1536 | /* |
| 1537 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) |
| 1538 | * 'On those occasions when an error or exception condition occurs |
| 1539 | * and the target elects to repeat the information transfer, the |
| 1540 | * target may repeat the transfer either issuing a RESTORE POINTERS |
| 1541 | * message or by disconnecting without issuing a SAVE POINTERS |
| 1542 | * message. When reconnection is completed, the most recent |
| 1543 | * saved pointer values are restored.' |
| 1544 | */ |
| 1545 | acornscsi_dma_cleanup(host); |
| 1546 | host->scsi.phase = PHASE_DISCONNECT; |
| 1547 | break; |
| 1548 | |
| 1549 | case MESSAGE_REJECT: |
| 1550 | #if 0 /* this isn't needed any more */ |
| 1551 | /* |
| 1552 | * If we were negociating sync transfer, we don't yet know if |
| 1553 | * this REJECT is for the sync transfer or for the tagged queue/wide |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1554 | * transfer. Re-initiate sync transfer negotiation now, and if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | * we got a REJECT in response to SDTR, then it'll be set to DONE. |
| 1556 | */ |
| 1557 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) |
| 1558 | host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; |
| 1559 | #endif |
| 1560 | |
| 1561 | /* |
| 1562 | * If we have any messages waiting to go out, then assert ATN now |
| 1563 | */ |
| 1564 | if (msgqueue_msglength(&host->scsi.msgs)) |
| 1565 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1566 | |
| 1567 | switch (host->scsi.last_message) { |
| 1568 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1569 | case HEAD_OF_QUEUE_TAG: |
| 1570 | case ORDERED_QUEUE_TAG: |
| 1571 | case SIMPLE_QUEUE_TAG: |
| 1572 | /* |
| 1573 | * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) |
| 1574 | * If a target does not implement tagged queuing and a queue tag |
| 1575 | * message is received, it shall respond with a MESSAGE REJECT |
| 1576 | * message and accept the I/O process as if it were untagged. |
| 1577 | */ |
| 1578 | printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", |
| 1579 | host->host->host_no, acornscsi_target(host)); |
| 1580 | host->SCpnt->device->simple_tags = 0; |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame^] | 1581 | set_bit(host->SCpnt->device->id * 8 + |
| 1582 | (u8)(host->SCpnt->device->lun & 0x7), host->busyluns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | break; |
| 1584 | #endif |
| 1585 | case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): |
| 1586 | /* |
| 1587 | * Target can't handle synchronous transfers |
| 1588 | */ |
| 1589 | printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", |
| 1590 | host->host->host_no, acornscsi_target(host)); |
| 1591 | host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; |
| 1592 | host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1593 | 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] | 1594 | break; |
| 1595 | |
| 1596 | default: |
| 1597 | break; |
| 1598 | } |
| 1599 | break; |
| 1600 | |
| 1601 | case QUEUE_FULL: |
| 1602 | /* TODO: target queue is full */ |
| 1603 | break; |
| 1604 | |
| 1605 | case SIMPLE_QUEUE_TAG: |
| 1606 | /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ |
| 1607 | printk("scsi%d.%c: reconnect queue tag %02X\n", |
| 1608 | host->host->host_no, acornscsi_target(host), |
| 1609 | message[1]); |
| 1610 | break; |
| 1611 | |
| 1612 | case EXTENDED_MESSAGE: |
| 1613 | switch (message[2]) { |
| 1614 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 1615 | case EXTENDED_SDTR: |
| 1616 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { |
| 1617 | /* |
| 1618 | * We requested synchronous transfers. This isn't quite right... |
| 1619 | * We can only say if this succeeded if we proceed on to execute the |
| 1620 | * command from this message. If we get a MESSAGE PARITY ERROR, |
| 1621 | * and the target retries fail, then we fallback to asynchronous mode |
| 1622 | */ |
| 1623 | host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; |
| 1624 | printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", |
| 1625 | host->host->host_no, acornscsi_target(host), |
| 1626 | message[4], message[3] * 4); |
| 1627 | host->device[host->SCpnt->device->id].sync_xfer = |
| 1628 | calc_sync_xfer(message[3] * 4, message[4]); |
| 1629 | } else { |
| 1630 | unsigned char period, length; |
| 1631 | /* |
| 1632 | * Target requested synchronous transfers. The agreement is only |
| 1633 | * to be in operation AFTER the target leaves message out phase. |
| 1634 | */ |
| 1635 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1636 | period = max_t(unsigned int, message[3], sdtr_period / 4); |
| 1637 | length = min_t(unsigned int, message[4], sdtr_size); |
| 1638 | msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, |
| 1639 | EXTENDED_SDTR, period, length); |
| 1640 | host->device[host->SCpnt->device->id].sync_xfer = |
| 1641 | calc_sync_xfer(period * 4, length); |
| 1642 | } |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1643 | 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] | 1644 | break; |
| 1645 | #else |
| 1646 | /* We do not accept synchronous transfers. Respond with a |
| 1647 | * MESSAGE_REJECT. |
| 1648 | */ |
| 1649 | #endif |
| 1650 | |
| 1651 | case EXTENDED_WDTR: |
| 1652 | /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT |
| 1653 | * to a wide data transfer request. |
| 1654 | */ |
| 1655 | default: |
| 1656 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1657 | msgqueue_flush(&host->scsi.msgs); |
| 1658 | msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); |
| 1659 | break; |
| 1660 | } |
| 1661 | break; |
| 1662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | default: /* reject message */ |
| 1664 | printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", |
| 1665 | host->host->host_no, acornscsi_target(host), |
| 1666 | message[0]); |
| 1667 | acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); |
| 1668 | msgqueue_flush(&host->scsi.msgs); |
| 1669 | msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); |
| 1670 | host->scsi.phase = PHASE_MSGIN; |
| 1671 | break; |
| 1672 | } |
| 1673 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1674 | } |
| 1675 | |
| 1676 | /* |
| 1677 | * Function: int acornscsi_buildmessages(AS_Host *host) |
| 1678 | * Purpose : build the connection messages for a host |
| 1679 | * Params : host - host to add messages to |
| 1680 | */ |
| 1681 | static |
| 1682 | void acornscsi_buildmessages(AS_Host *host) |
| 1683 | { |
| 1684 | #if 0 |
| 1685 | /* does the device need resetting? */ |
| 1686 | if (cmd_reset) { |
| 1687 | msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); |
| 1688 | return; |
| 1689 | } |
| 1690 | #endif |
| 1691 | |
| 1692 | msgqueue_addmsg(&host->scsi.msgs, 1, |
| 1693 | IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, |
| 1694 | host->SCpnt->device->lun)); |
| 1695 | |
| 1696 | #if 0 |
| 1697 | /* does the device need the current command aborted */ |
| 1698 | if (cmd_aborted) { |
| 1699 | acornscsi_abortcmd(host->SCpnt->tag); |
| 1700 | return; |
| 1701 | } |
| 1702 | #endif |
| 1703 | |
| 1704 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1705 | if (host->SCpnt->tag) { |
| 1706 | unsigned int tag_type; |
| 1707 | |
| 1708 | if (host->SCpnt->cmnd[0] == REQUEST_SENSE || |
| 1709 | host->SCpnt->cmnd[0] == TEST_UNIT_READY || |
| 1710 | host->SCpnt->cmnd[0] == INQUIRY) |
| 1711 | tag_type = HEAD_OF_QUEUE_TAG; |
| 1712 | else |
| 1713 | tag_type = SIMPLE_QUEUE_TAG; |
| 1714 | msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); |
| 1715 | } |
| 1716 | #endif |
| 1717 | |
| 1718 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 1719 | if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { |
| 1720 | host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; |
| 1721 | msgqueue_addmsg(&host->scsi.msgs, 5, |
| 1722 | EXTENDED_MESSAGE, 3, EXTENDED_SDTR, |
| 1723 | sdtr_period / 4, sdtr_size); |
| 1724 | } |
| 1725 | #endif |
| 1726 | } |
| 1727 | |
| 1728 | /* |
| 1729 | * Function: int acornscsi_starttransfer(AS_Host *host) |
| 1730 | * Purpose : transfer data to/from connected target |
| 1731 | * Params : host - host to which target is connected |
| 1732 | * Returns : 0 if failure |
| 1733 | */ |
| 1734 | static |
| 1735 | int acornscsi_starttransfer(AS_Host *host) |
| 1736 | { |
| 1737 | int residual; |
| 1738 | |
| 1739 | if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { |
| 1740 | printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", |
| 1741 | host->host->host_no, acornscsi_target(host)); |
| 1742 | return 0; |
| 1743 | } |
| 1744 | |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 1745 | residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1747 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); |
| 1748 | sbic_arm_writenext(host, residual >> 16); |
| 1749 | sbic_arm_writenext(host, residual >> 8); |
| 1750 | sbic_arm_writenext(host, residual); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | acornscsi_sbic_issuecmd(host, CMND_XFERINFO); |
| 1752 | return 1; |
| 1753 | } |
| 1754 | |
| 1755 | /* ========================================================================================= |
| 1756 | * Connection & Disconnection |
| 1757 | */ |
| 1758 | /* |
| 1759 | * Function : acornscsi_reconnect(AS_Host *host) |
| 1760 | * Purpose : reconnect a previously disconnected command |
| 1761 | * Params : host - host specific data |
| 1762 | * Remarks : SCSI spec says: |
| 1763 | * 'The set of active pointers is restored from the set |
| 1764 | * of saved pointers upon reconnection of the I/O process' |
| 1765 | */ |
| 1766 | static |
| 1767 | int acornscsi_reconnect(AS_Host *host) |
| 1768 | { |
| 1769 | unsigned int target, lun, ok = 0; |
| 1770 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1771 | target = sbic_arm_read(host, SBIC_SOURCEID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
| 1773 | if (!(target & 8)) |
| 1774 | printk(KERN_ERR "scsi%d: invalid source id after reselection " |
| 1775 | "- device fault?\n", |
| 1776 | host->host->host_no); |
| 1777 | |
| 1778 | target &= 7; |
| 1779 | |
| 1780 | if (host->SCpnt && !host->scsi.disconnectable) { |
| 1781 | printk(KERN_ERR "scsi%d.%d: reconnected while command in " |
| 1782 | "progress to target %d?\n", |
| 1783 | host->host->host_no, target, host->SCpnt->device->id); |
| 1784 | host->SCpnt = NULL; |
| 1785 | } |
| 1786 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1787 | lun = sbic_arm_read(host, SBIC_DATA) & 7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | |
| 1789 | host->scsi.reconnected.target = target; |
| 1790 | host->scsi.reconnected.lun = lun; |
| 1791 | host->scsi.reconnected.tag = 0; |
| 1792 | |
| 1793 | if (host->scsi.disconnectable && host->SCpnt && |
| 1794 | host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) |
| 1795 | ok = 1; |
| 1796 | |
| 1797 | if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) |
| 1798 | ok = 1; |
| 1799 | |
| 1800 | ADD_STATUS(target, 0x81, host->scsi.phase, 0); |
| 1801 | |
| 1802 | if (ok) { |
| 1803 | host->scsi.phase = PHASE_RECONNECTED; |
| 1804 | } else { |
| 1805 | /* this doesn't seem to work */ |
| 1806 | printk(KERN_ERR "scsi%d.%c: reselected with no command " |
| 1807 | "to reconnect with\n", |
| 1808 | host->host->host_no, '0' + target); |
| 1809 | acornscsi_dumplog(host, target); |
| 1810 | acornscsi_abortcmd(host, 0); |
| 1811 | if (host->SCpnt) { |
| 1812 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 1813 | host->SCpnt = NULL; |
| 1814 | } |
| 1815 | } |
| 1816 | acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); |
| 1817 | return !ok; |
| 1818 | } |
| 1819 | |
| 1820 | /* |
| 1821 | * Function: int acornscsi_reconect_finish(AS_Host *host) |
| 1822 | * Purpose : finish reconnecting a command |
| 1823 | * Params : host - host to complete |
| 1824 | * Returns : 0 if failed |
| 1825 | */ |
| 1826 | static |
| 1827 | int acornscsi_reconnect_finish(AS_Host *host) |
| 1828 | { |
| 1829 | if (host->scsi.disconnectable && host->SCpnt) { |
| 1830 | host->scsi.disconnectable = 0; |
| 1831 | if (host->SCpnt->device->id == host->scsi.reconnected.target && |
| 1832 | host->SCpnt->device->lun == host->scsi.reconnected.lun && |
| 1833 | host->SCpnt->tag == host->scsi.reconnected.tag) { |
| 1834 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1835 | DBG(host->SCpnt, printk("scsi%d.%c: reconnected", |
| 1836 | host->host->host_no, acornscsi_target(host))); |
| 1837 | #endif |
| 1838 | } else { |
| 1839 | queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); |
| 1840 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1841 | DBG(host->SCpnt, printk("scsi%d.%c: had to move command " |
| 1842 | "to disconnected queue\n", |
| 1843 | host->host->host_no, acornscsi_target(host))); |
| 1844 | #endif |
| 1845 | host->SCpnt = NULL; |
| 1846 | } |
| 1847 | } |
| 1848 | if (!host->SCpnt) { |
| 1849 | host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, |
| 1850 | host->scsi.reconnected.target, |
| 1851 | host->scsi.reconnected.lun, |
| 1852 | host->scsi.reconnected.tag); |
| 1853 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1854 | DBG(host->SCpnt, printk("scsi%d.%c: had to get command", |
| 1855 | host->host->host_no, acornscsi_target(host))); |
| 1856 | #endif |
| 1857 | } |
| 1858 | |
| 1859 | if (!host->SCpnt) |
| 1860 | acornscsi_abortcmd(host, host->scsi.reconnected.tag); |
| 1861 | else { |
| 1862 | /* |
| 1863 | * Restore data pointer from SAVED pointers. |
| 1864 | */ |
| 1865 | host->scsi.SCp = host->SCpnt->SCp; |
| 1866 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1867 | printk(", data pointers: [%p, %X]", |
| 1868 | host->scsi.SCp.ptr, host->scsi.SCp.this_residual); |
| 1869 | #endif |
| 1870 | } |
| 1871 | #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) |
| 1872 | printk("\n"); |
| 1873 | #endif |
| 1874 | |
| 1875 | host->dma.transferred = host->scsi.SCp.scsi_xferred; |
| 1876 | |
| 1877 | return host->SCpnt != NULL; |
| 1878 | } |
| 1879 | |
| 1880 | /* |
| 1881 | * Function: void acornscsi_disconnect_unexpected(AS_Host *host) |
| 1882 | * Purpose : handle an unexpected disconnect |
| 1883 | * Params : host - host on which disconnect occurred |
| 1884 | */ |
| 1885 | static |
| 1886 | void acornscsi_disconnect_unexpected(AS_Host *host) |
| 1887 | { |
| 1888 | printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", |
| 1889 | host->host->host_no, acornscsi_target(host)); |
| 1890 | #if (DEBUG & DEBUG_ABORT) |
| 1891 | acornscsi_dumplog(host, 8); |
| 1892 | #endif |
| 1893 | |
| 1894 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 1895 | } |
| 1896 | |
| 1897 | /* |
| 1898 | * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) |
| 1899 | * Purpose : abort a currently executing command |
| 1900 | * Params : host - host with connected command to abort |
| 1901 | * tag - tag to abort |
| 1902 | */ |
| 1903 | static |
| 1904 | void acornscsi_abortcmd(AS_Host *host, unsigned char tag) |
| 1905 | { |
| 1906 | host->scsi.phase = PHASE_ABORTED; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1907 | sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
| 1909 | msgqueue_flush(&host->scsi.msgs); |
| 1910 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 1911 | if (tag) |
| 1912 | msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); |
| 1913 | else |
| 1914 | #endif |
| 1915 | msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); |
| 1916 | } |
| 1917 | |
| 1918 | /* ========================================================================================== |
| 1919 | * Interrupt routines. |
| 1920 | */ |
| 1921 | /* |
| 1922 | * Function: int acornscsi_sbicintr(AS_Host *host) |
| 1923 | * Purpose : handle interrupts from SCSI device |
| 1924 | * Params : host - host to process |
| 1925 | * Returns : INTR_PROCESS if expecting another SBIC interrupt |
| 1926 | * INTR_IDLE if no interrupt |
| 1927 | * INTR_NEXT_COMMAND if we have finished processing the command |
| 1928 | */ |
| 1929 | static |
| 1930 | intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) |
| 1931 | { |
| 1932 | unsigned int asr, ssr; |
| 1933 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1934 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | if (!(asr & ASR_INT)) |
| 1936 | return INTR_IDLE; |
| 1937 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1938 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | |
| 1940 | #if (DEBUG & DEBUG_PHASES) |
| 1941 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 1942 | #endif |
| 1943 | |
| 1944 | ADD_STATUS(8, ssr, host->scsi.phase, in_irq); |
| 1945 | |
| 1946 | if (host->SCpnt && !host->scsi.disconnectable) |
| 1947 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); |
| 1948 | |
| 1949 | switch (ssr) { |
| 1950 | case 0x00: /* reset state - not advanced */ |
| 1951 | printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", |
| 1952 | host->host->host_no); |
| 1953 | /* setup sbic - WD33C93A */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1954 | sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id); |
| 1955 | sbic_arm_write(host, SBIC_CMND, CMND_RESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | return INTR_IDLE; |
| 1957 | |
| 1958 | case 0x01: /* reset state - advanced */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1959 | sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); |
| 1960 | sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME); |
| 1961 | sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); |
| 1962 | sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | msgqueue_flush(&host->scsi.msgs); |
| 1964 | return INTR_IDLE; |
| 1965 | |
| 1966 | case 0x41: /* unexpected disconnect aborted command */ |
| 1967 | acornscsi_disconnect_unexpected(host); |
| 1968 | return INTR_NEXT_COMMAND; |
| 1969 | } |
| 1970 | |
| 1971 | switch (host->scsi.phase) { |
| 1972 | case PHASE_CONNECTING: /* STATE: command removed from issue queue */ |
| 1973 | switch (ssr) { |
| 1974 | case 0x11: /* -> PHASE_CONNECTED */ |
| 1975 | /* BUS FREE -> SELECTION */ |
| 1976 | host->scsi.phase = PHASE_CONNECTED; |
| 1977 | msgqueue_flush(&host->scsi.msgs); |
| 1978 | host->dma.transferred = host->scsi.SCp.scsi_xferred; |
| 1979 | /* 33C93 gives next interrupt indicating bus phase */ |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 1980 | asr = sbic_arm_read(host, SBIC_ASR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | if (!(asr & ASR_INT)) |
| 1982 | break; |
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 | ADD_STATUS(8, ssr, host->scsi.phase, 1); |
| 1985 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); |
| 1986 | goto connected; |
| 1987 | |
| 1988 | case 0x42: /* select timed out */ |
| 1989 | /* -> PHASE_IDLE */ |
| 1990 | acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); |
| 1991 | return INTR_NEXT_COMMAND; |
| 1992 | |
| 1993 | case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ |
| 1994 | /* BUS FREE -> RESELECTION */ |
| 1995 | host->origSCpnt = host->SCpnt; |
| 1996 | host->SCpnt = NULL; |
| 1997 | msgqueue_flush(&host->scsi.msgs); |
| 1998 | acornscsi_reconnect(host); |
| 1999 | break; |
| 2000 | |
| 2001 | default: |
| 2002 | printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", |
| 2003 | host->host->host_no, acornscsi_target(host), ssr); |
| 2004 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2005 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2006 | } |
| 2007 | return INTR_PROCESSING; |
| 2008 | |
| 2009 | connected: |
| 2010 | case PHASE_CONNECTED: /* STATE: device selected ok */ |
| 2011 | switch (ssr) { |
| 2012 | #ifdef NONSTANDARD |
| 2013 | case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2014 | /* SELECTION -> COMMAND */ |
| 2015 | acornscsi_sendcommand(host); |
| 2016 | break; |
| 2017 | |
| 2018 | case 0x8b: /* -> PHASE_STATUS */ |
| 2019 | /* SELECTION -> STATUS */ |
| 2020 | acornscsi_readstatusbyte(host); |
| 2021 | host->scsi.phase = PHASE_STATUSIN; |
| 2022 | break; |
| 2023 | #endif |
| 2024 | |
| 2025 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2026 | /* SELECTION ->MESSAGE OUT */ |
| 2027 | host->scsi.phase = PHASE_MSGOUT; |
| 2028 | acornscsi_buildmessages(host); |
| 2029 | acornscsi_sendmessage(host); |
| 2030 | break; |
| 2031 | |
| 2032 | /* these should not happen */ |
| 2033 | case 0x85: /* target disconnected */ |
| 2034 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 2035 | break; |
| 2036 | |
| 2037 | default: |
| 2038 | printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", |
| 2039 | host->host->host_no, acornscsi_target(host), ssr); |
| 2040 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2041 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2042 | } |
| 2043 | return INTR_PROCESSING; |
| 2044 | |
| 2045 | case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ |
| 2046 | /* |
| 2047 | * SCSI standard says that MESSAGE OUT phases can be followed by a |
| 2048 | * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase |
| 2049 | */ |
| 2050 | switch (ssr) { |
| 2051 | case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2052 | case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2053 | /* MESSAGE OUT -> COMMAND */ |
| 2054 | acornscsi_sendcommand(host); |
| 2055 | break; |
| 2056 | |
| 2057 | case 0x8b: /* -> PHASE_STATUS */ |
| 2058 | case 0x1b: /* -> PHASE_STATUS */ |
| 2059 | /* MESSAGE OUT -> STATUS */ |
| 2060 | acornscsi_readstatusbyte(host); |
| 2061 | host->scsi.phase = PHASE_STATUSIN; |
| 2062 | break; |
| 2063 | |
| 2064 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2065 | /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ |
| 2066 | acornscsi_sendmessage(host); |
| 2067 | break; |
| 2068 | |
| 2069 | case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2070 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2071 | /* MESSAGE OUT -> MESSAGE IN */ |
| 2072 | acornscsi_message(host); |
| 2073 | break; |
| 2074 | |
| 2075 | default: |
| 2076 | printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", |
| 2077 | host->host->host_no, acornscsi_target(host), ssr); |
| 2078 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2079 | } |
| 2080 | return INTR_PROCESSING; |
| 2081 | |
| 2082 | case PHASE_COMMAND: /* STATE: connected & command sent */ |
| 2083 | switch (ssr) { |
| 2084 | case 0x18: /* -> PHASE_DATAOUT */ |
| 2085 | /* COMMAND -> DATA OUT */ |
| 2086 | if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) |
| 2087 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2088 | acornscsi_dma_setup(host, DMA_OUT); |
| 2089 | if (!acornscsi_starttransfer(host)) |
| 2090 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2091 | host->scsi.phase = PHASE_DATAOUT; |
| 2092 | return INTR_IDLE; |
| 2093 | |
| 2094 | case 0x19: /* -> PHASE_DATAIN */ |
| 2095 | /* COMMAND -> DATA IN */ |
| 2096 | if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) |
| 2097 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2098 | acornscsi_dma_setup(host, DMA_IN); |
| 2099 | if (!acornscsi_starttransfer(host)) |
| 2100 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2101 | host->scsi.phase = PHASE_DATAIN; |
| 2102 | return INTR_IDLE; |
| 2103 | |
| 2104 | case 0x1b: /* -> PHASE_STATUS */ |
| 2105 | /* COMMAND -> STATUS */ |
| 2106 | acornscsi_readstatusbyte(host); |
| 2107 | host->scsi.phase = PHASE_STATUSIN; |
| 2108 | break; |
| 2109 | |
| 2110 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2111 | /* COMMAND -> MESSAGE OUT */ |
| 2112 | acornscsi_sendmessage(host); |
| 2113 | break; |
| 2114 | |
| 2115 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2116 | /* COMMAND -> MESSAGE IN */ |
| 2117 | acornscsi_message(host); |
| 2118 | break; |
| 2119 | |
| 2120 | default: |
| 2121 | printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, 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_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ |
| 2128 | if (ssr == 0x85) { /* -> PHASE_IDLE */ |
| 2129 | host->scsi.disconnectable = 1; |
| 2130 | host->scsi.reconnected.tag = 0; |
| 2131 | host->scsi.phase = PHASE_IDLE; |
| 2132 | host->stats.disconnects += 1; |
| 2133 | } else { |
| 2134 | printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", |
| 2135 | host->host->host_no, acornscsi_target(host), ssr); |
| 2136 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2137 | } |
| 2138 | return INTR_NEXT_COMMAND; |
| 2139 | |
| 2140 | case PHASE_IDLE: /* STATE: disconnected */ |
| 2141 | if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ |
| 2142 | acornscsi_reconnect(host); |
| 2143 | else { |
| 2144 | printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", |
| 2145 | host->host->host_no, acornscsi_target(host), ssr); |
| 2146 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2147 | } |
| 2148 | return INTR_PROCESSING; |
| 2149 | |
| 2150 | case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ |
| 2151 | /* |
| 2152 | * Command reconnected - if MESGIN, get message - it may be |
| 2153 | * the tag. If not, get command out of disconnected queue |
| 2154 | */ |
| 2155 | /* |
| 2156 | * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, |
| 2157 | * reconnect I_T_L command |
| 2158 | */ |
| 2159 | if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) |
| 2160 | return INTR_IDLE; |
| 2161 | ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); |
| 2162 | switch (ssr) { |
| 2163 | case 0x88: /* data out phase */ |
| 2164 | /* -> PHASE_DATAOUT */ |
| 2165 | /* MESSAGE IN -> DATA OUT */ |
| 2166 | acornscsi_dma_setup(host, DMA_OUT); |
| 2167 | if (!acornscsi_starttransfer(host)) |
| 2168 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2169 | host->scsi.phase = PHASE_DATAOUT; |
| 2170 | return INTR_IDLE; |
| 2171 | |
| 2172 | case 0x89: /* data in phase */ |
| 2173 | /* -> PHASE_DATAIN */ |
| 2174 | /* MESSAGE IN -> DATA IN */ |
| 2175 | acornscsi_dma_setup(host, DMA_IN); |
| 2176 | if (!acornscsi_starttransfer(host)) |
| 2177 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2178 | host->scsi.phase = PHASE_DATAIN; |
| 2179 | return INTR_IDLE; |
| 2180 | |
| 2181 | case 0x8a: /* command out */ |
| 2182 | /* MESSAGE IN -> COMMAND */ |
| 2183 | acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ |
| 2184 | break; |
| 2185 | |
| 2186 | case 0x8b: /* status in */ |
| 2187 | /* -> PHASE_STATUSIN */ |
| 2188 | /* MESSAGE IN -> STATUS */ |
| 2189 | acornscsi_readstatusbyte(host); |
| 2190 | host->scsi.phase = PHASE_STATUSIN; |
| 2191 | break; |
| 2192 | |
| 2193 | case 0x8e: /* message out */ |
| 2194 | /* -> PHASE_MSGOUT */ |
| 2195 | /* MESSAGE IN -> MESSAGE OUT */ |
| 2196 | acornscsi_sendmessage(host); |
| 2197 | break; |
| 2198 | |
| 2199 | case 0x8f: /* message in */ |
| 2200 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2201 | break; |
| 2202 | |
| 2203 | default: |
| 2204 | printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", |
| 2205 | host->host->host_no, acornscsi_target(host), ssr); |
| 2206 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2207 | } |
| 2208 | return INTR_PROCESSING; |
| 2209 | |
| 2210 | case PHASE_DATAIN: /* STATE: transferred data in */ |
| 2211 | /* |
| 2212 | * This is simple - if we disconnect then the DMA address & count is |
| 2213 | * correct. |
| 2214 | */ |
| 2215 | switch (ssr) { |
| 2216 | case 0x19: /* -> PHASE_DATAIN */ |
| 2217 | case 0x89: /* -> PHASE_DATAIN */ |
| 2218 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2219 | return INTR_IDLE; |
| 2220 | |
| 2221 | case 0x1b: /* -> PHASE_STATUSIN */ |
| 2222 | case 0x4b: /* -> PHASE_STATUSIN */ |
| 2223 | case 0x8b: /* -> PHASE_STATUSIN */ |
| 2224 | /* DATA IN -> STATUS */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2225 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | acornscsi_sbic_xfcount(host); |
| 2227 | acornscsi_dma_stop(host); |
| 2228 | acornscsi_readstatusbyte(host); |
| 2229 | host->scsi.phase = PHASE_STATUSIN; |
| 2230 | break; |
| 2231 | |
| 2232 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2233 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2234 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2235 | /* DATA IN -> MESSAGE OUT */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2236 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | acornscsi_sbic_xfcount(host); |
| 2238 | acornscsi_dma_stop(host); |
| 2239 | acornscsi_sendmessage(host); |
| 2240 | break; |
| 2241 | |
| 2242 | case 0x1f: /* message in */ |
| 2243 | case 0x4f: /* message in */ |
| 2244 | case 0x8f: /* message in */ |
| 2245 | /* DATA IN -> MESSAGE IN */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2246 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | acornscsi_sbic_xfcount(host); |
| 2248 | acornscsi_dma_stop(host); |
| 2249 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2250 | break; |
| 2251 | |
| 2252 | default: |
| 2253 | printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", |
| 2254 | host->host->host_no, acornscsi_target(host), ssr); |
| 2255 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2256 | } |
| 2257 | return INTR_PROCESSING; |
| 2258 | |
| 2259 | case PHASE_DATAOUT: /* STATE: transferred data out */ |
| 2260 | /* |
| 2261 | * This is more complicated - if we disconnect, the DMA could be 12 |
| 2262 | * bytes ahead of us. We need to correct this. |
| 2263 | */ |
| 2264 | switch (ssr) { |
| 2265 | case 0x18: /* -> PHASE_DATAOUT */ |
| 2266 | case 0x88: /* -> PHASE_DATAOUT */ |
| 2267 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2268 | return INTR_IDLE; |
| 2269 | |
| 2270 | case 0x1b: /* -> PHASE_STATUSIN */ |
| 2271 | case 0x4b: /* -> PHASE_STATUSIN */ |
| 2272 | case 0x8b: /* -> PHASE_STATUSIN */ |
| 2273 | /* DATA OUT -> STATUS */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2274 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | acornscsi_sbic_xfcount(host); |
| 2276 | acornscsi_dma_stop(host); |
| 2277 | acornscsi_dma_adjust(host); |
| 2278 | acornscsi_readstatusbyte(host); |
| 2279 | host->scsi.phase = PHASE_STATUSIN; |
| 2280 | break; |
| 2281 | |
| 2282 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2283 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2284 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2285 | /* DATA OUT -> MESSAGE OUT */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2286 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | acornscsi_sbic_xfcount(host); |
| 2288 | acornscsi_dma_stop(host); |
| 2289 | acornscsi_dma_adjust(host); |
| 2290 | acornscsi_sendmessage(host); |
| 2291 | break; |
| 2292 | |
| 2293 | case 0x1f: /* message in */ |
| 2294 | case 0x4f: /* message in */ |
| 2295 | case 0x8f: /* message in */ |
| 2296 | /* DATA OUT -> MESSAGE IN */ |
Boaz Harrosh | 84ac86c | 2007-09-09 21:31:21 +0300 | [diff] [blame] | 2297 | host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | acornscsi_sbic_xfcount(host); |
| 2299 | acornscsi_dma_stop(host); |
| 2300 | acornscsi_dma_adjust(host); |
| 2301 | acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ |
| 2302 | break; |
| 2303 | |
| 2304 | default: |
| 2305 | printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", |
| 2306 | host->host->host_no, acornscsi_target(host), ssr); |
| 2307 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2308 | } |
| 2309 | return INTR_PROCESSING; |
| 2310 | |
| 2311 | case PHASE_STATUSIN: /* STATE: status in complete */ |
| 2312 | switch (ssr) { |
| 2313 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2314 | case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2315 | /* STATUS -> MESSAGE IN */ |
| 2316 | acornscsi_message(host); |
| 2317 | break; |
| 2318 | |
| 2319 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2320 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2321 | /* STATUS -> MESSAGE OUT */ |
| 2322 | acornscsi_sendmessage(host); |
| 2323 | break; |
| 2324 | |
| 2325 | default: |
| 2326 | printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", |
| 2327 | host->host->host_no, acornscsi_target(host), ssr); |
| 2328 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2329 | } |
| 2330 | return INTR_PROCESSING; |
| 2331 | |
| 2332 | case PHASE_MSGIN: /* STATE: message in */ |
| 2333 | switch (ssr) { |
| 2334 | case 0x1e: /* -> PHASE_MSGOUT */ |
| 2335 | case 0x4e: /* -> PHASE_MSGOUT */ |
| 2336 | case 0x8e: /* -> PHASE_MSGOUT */ |
| 2337 | /* MESSAGE IN -> MESSAGE OUT */ |
| 2338 | acornscsi_sendmessage(host); |
| 2339 | break; |
| 2340 | |
| 2341 | case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ |
| 2342 | case 0x2f: |
| 2343 | case 0x4f: |
| 2344 | case 0x8f: |
| 2345 | acornscsi_message(host); |
| 2346 | break; |
| 2347 | |
| 2348 | case 0x85: |
| 2349 | printk("scsi%d.%c: strange message in disconnection\n", |
| 2350 | host->host->host_no, acornscsi_target(host)); |
| 2351 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2352 | acornscsi_done(host, &host->SCpnt, DID_ERROR); |
| 2353 | break; |
| 2354 | |
| 2355 | default: |
| 2356 | printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", |
| 2357 | host->host->host_no, acornscsi_target(host), ssr); |
| 2358 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2359 | } |
| 2360 | return INTR_PROCESSING; |
| 2361 | |
| 2362 | case PHASE_DONE: /* STATE: received status & message */ |
| 2363 | switch (ssr) { |
| 2364 | case 0x85: /* -> PHASE_IDLE */ |
| 2365 | acornscsi_done(host, &host->SCpnt, DID_OK); |
| 2366 | return INTR_NEXT_COMMAND; |
| 2367 | |
| 2368 | case 0x1e: |
| 2369 | case 0x8e: |
| 2370 | acornscsi_sendmessage(host); |
| 2371 | break; |
| 2372 | |
| 2373 | default: |
| 2374 | printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", |
| 2375 | host->host->host_no, acornscsi_target(host), ssr); |
| 2376 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2377 | } |
| 2378 | return INTR_PROCESSING; |
| 2379 | |
| 2380 | case PHASE_ABORTED: |
| 2381 | switch (ssr) { |
| 2382 | case 0x85: |
| 2383 | if (host->SCpnt) |
| 2384 | acornscsi_done(host, &host->SCpnt, DID_ABORT); |
| 2385 | else { |
| 2386 | clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, |
| 2387 | host->busyluns); |
| 2388 | host->scsi.phase = PHASE_IDLE; |
| 2389 | } |
| 2390 | return INTR_NEXT_COMMAND; |
| 2391 | |
| 2392 | case 0x1e: |
| 2393 | case 0x2e: |
| 2394 | case 0x4e: |
| 2395 | case 0x8e: |
| 2396 | acornscsi_sendmessage(host); |
| 2397 | break; |
| 2398 | |
| 2399 | default: |
| 2400 | printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n", |
| 2401 | host->host->host_no, acornscsi_target(host), ssr); |
| 2402 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2403 | } |
| 2404 | return INTR_PROCESSING; |
| 2405 | |
| 2406 | default: |
| 2407 | printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", |
| 2408 | host->host->host_no, acornscsi_target(host), ssr); |
| 2409 | acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); |
| 2410 | } |
| 2411 | return INTR_PROCESSING; |
| 2412 | } |
| 2413 | |
| 2414 | /* |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2415 | * Prototype: void acornscsi_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | * Purpose : handle interrupts from Acorn SCSI card |
| 2417 | * Params : irq - interrupt number |
| 2418 | * dev_id - device specific data (AS_Host structure) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | */ |
| 2420 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2421 | acornscsi_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | { |
| 2423 | AS_Host *host = (AS_Host *)dev_id; |
| 2424 | intr_ret_t ret; |
| 2425 | int iostatus; |
| 2426 | int in_irq = 0; |
| 2427 | |
| 2428 | do { |
| 2429 | ret = INTR_IDLE; |
| 2430 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2431 | iostatus = readb(host->fast + INT_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | |
| 2433 | if (iostatus & 2) { |
| 2434 | acornscsi_dma_intr(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2435 | iostatus = readb(host->fast + INT_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | } |
| 2437 | |
| 2438 | if (iostatus & 8) |
| 2439 | ret = acornscsi_sbicintr(host, in_irq); |
| 2440 | |
| 2441 | /* |
| 2442 | * If we have a transfer pending, start it. |
| 2443 | * Only start it if the interface has already started transferring |
| 2444 | * it's data |
| 2445 | */ |
| 2446 | if (host->dma.xfer_required) |
| 2447 | acornscsi_dma_xfer(host); |
| 2448 | |
| 2449 | if (ret == INTR_NEXT_COMMAND) |
| 2450 | ret = acornscsi_kick(host); |
| 2451 | |
| 2452 | in_irq = 1; |
| 2453 | } while (ret != INTR_IDLE); |
| 2454 | |
| 2455 | return IRQ_HANDLED; |
| 2456 | } |
| 2457 | |
| 2458 | /*============================================================================================= |
| 2459 | * Interfaces between interrupt handler and rest of scsi code |
| 2460 | */ |
| 2461 | |
| 2462 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2463 | * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | * Purpose : queues a SCSI command |
| 2465 | * Params : cmd - SCSI command |
| 2466 | * done - function called on completion, with pointer to command descriptor |
| 2467 | * Returns : 0, or < 0 on error. |
| 2468 | */ |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 2469 | static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt, |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2470 | void (*done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | { |
| 2472 | AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; |
| 2473 | |
| 2474 | if (!done) { |
| 2475 | /* there should be some way of rejecting errors like this without panicing... */ |
| 2476 | panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", |
| 2477 | host->host->host_no, SCpnt); |
| 2478 | return -EINVAL; |
| 2479 | } |
| 2480 | |
| 2481 | #if (DEBUG & DEBUG_NO_WRITE) |
| 2482 | if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { |
| 2483 | printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", |
| 2484 | host->host->host_no, '0' + SCpnt->device->id); |
| 2485 | SCpnt->result = DID_NO_CONNECT << 16; |
| 2486 | done(SCpnt); |
| 2487 | return 0; |
| 2488 | } |
| 2489 | #endif |
| 2490 | |
| 2491 | SCpnt->scsi_done = done; |
| 2492 | SCpnt->host_scribble = NULL; |
| 2493 | SCpnt->result = 0; |
| 2494 | SCpnt->tag = 0; |
| 2495 | SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); |
| 2496 | SCpnt->SCp.sent_command = 0; |
| 2497 | SCpnt->SCp.scsi_xferred = 0; |
| 2498 | |
| 2499 | init_SCp(SCpnt); |
| 2500 | |
| 2501 | host->stats.queues += 1; |
| 2502 | |
| 2503 | { |
| 2504 | unsigned long flags; |
| 2505 | |
| 2506 | if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { |
| 2507 | SCpnt->result = DID_ERROR << 16; |
| 2508 | done(SCpnt); |
| 2509 | return 0; |
| 2510 | } |
| 2511 | local_irq_save(flags); |
| 2512 | if (host->scsi.phase == PHASE_IDLE) |
| 2513 | acornscsi_kick(host); |
| 2514 | local_irq_restore(flags); |
| 2515 | } |
| 2516 | return 0; |
| 2517 | } |
| 2518 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 2519 | DEF_SCSI_QCMD(acornscsi_queuecmd) |
| 2520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2522 | * 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] | 2523 | * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 |
| 2524 | * Params : SCpntp1 - pointer to command to return |
| 2525 | * SCpntp2 - pointer to command to check |
| 2526 | * result - result to pass back to mid-level done function |
| 2527 | * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. |
| 2528 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2529 | static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, |
| 2530 | struct scsi_cmnd **SCpntp2, |
| 2531 | int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2533 | struct scsi_cmnd *SCpnt = *SCpntp1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | |
| 2535 | if (SCpnt) { |
| 2536 | *SCpntp1 = NULL; |
| 2537 | |
| 2538 | SCpnt->result = result; |
| 2539 | SCpnt->scsi_done(SCpnt); |
| 2540 | } |
| 2541 | |
| 2542 | if (SCpnt == *SCpntp2) |
| 2543 | *SCpntp2 = NULL; |
| 2544 | } |
| 2545 | |
| 2546 | enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; |
| 2547 | |
| 2548 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2549 | * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | * Purpose : abort a command on this host |
| 2551 | * Params : SCpnt - command to abort |
| 2552 | * Returns : our abort status |
| 2553 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2554 | 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] | 2555 | { |
| 2556 | enum res_abort res = res_not_running; |
| 2557 | |
| 2558 | if (queue_remove_cmd(&host->queues.issue, SCpnt)) { |
| 2559 | /* |
| 2560 | * The command was on the issue queue, and has not been |
| 2561 | * issued yet. We can remove the command from the queue, |
| 2562 | * and acknowledge the abort. Neither the devices nor the |
| 2563 | * interface know about the command. |
| 2564 | */ |
| 2565 | //#if (DEBUG & DEBUG_ABORT) |
| 2566 | printk("on issue queue "); |
| 2567 | //#endif |
| 2568 | res = res_success; |
| 2569 | } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { |
| 2570 | /* |
| 2571 | * The command was on the disconnected queue. Simply |
| 2572 | * acknowledge the abort condition, and when the target |
| 2573 | * reconnects, we will give it an ABORT message. The |
| 2574 | * target should then disconnect, and we will clear |
| 2575 | * the busylun bit. |
| 2576 | */ |
| 2577 | //#if (DEBUG & DEBUG_ABORT) |
| 2578 | printk("on disconnected queue "); |
| 2579 | //#endif |
| 2580 | res = res_success; |
| 2581 | } else if (host->SCpnt == SCpnt) { |
| 2582 | unsigned long flags; |
| 2583 | |
| 2584 | //#if (DEBUG & DEBUG_ABORT) |
| 2585 | printk("executing "); |
| 2586 | //#endif |
| 2587 | |
| 2588 | local_irq_save(flags); |
| 2589 | switch (host->scsi.phase) { |
| 2590 | /* |
| 2591 | * If the interface is idle, and the command is 'disconnectable', |
| 2592 | * then it is the same as on the disconnected queue. We simply |
| 2593 | * remove all traces of the command. When the target reconnects, |
| 2594 | * we will give it an ABORT message since the command could not |
| 2595 | * be found. When the target finally disconnects, we will clear |
| 2596 | * the busylun bit. |
| 2597 | */ |
| 2598 | case PHASE_IDLE: |
| 2599 | if (host->scsi.disconnectable) { |
| 2600 | host->scsi.disconnectable = 0; |
| 2601 | host->SCpnt = NULL; |
| 2602 | res = res_success; |
| 2603 | } |
| 2604 | break; |
| 2605 | |
| 2606 | /* |
| 2607 | * If the command has connected and done nothing further, |
| 2608 | * simply force a disconnect. We also need to clear the |
| 2609 | * busylun bit. |
| 2610 | */ |
| 2611 | case PHASE_CONNECTED: |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2612 | sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | host->SCpnt = NULL; |
| 2614 | res = res_success_clear; |
| 2615 | break; |
| 2616 | |
| 2617 | default: |
| 2618 | acornscsi_abortcmd(host, host->SCpnt->tag); |
| 2619 | res = res_snooze; |
| 2620 | } |
| 2621 | local_irq_restore(flags); |
| 2622 | } else if (host->origSCpnt == SCpnt) { |
| 2623 | /* |
| 2624 | * The command will be executed next, but a command |
| 2625 | * is currently using the interface. This is similar to |
| 2626 | * being on the issue queue, except the busylun bit has |
| 2627 | * been set. |
| 2628 | */ |
| 2629 | host->origSCpnt = NULL; |
| 2630 | //#if (DEBUG & DEBUG_ABORT) |
| 2631 | printk("waiting for execution "); |
| 2632 | //#endif |
| 2633 | res = res_success_clear; |
| 2634 | } else |
| 2635 | printk("unknown "); |
| 2636 | |
| 2637 | return res; |
| 2638 | } |
| 2639 | |
| 2640 | /* |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2641 | * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | * Purpose : abort a command on this host |
| 2643 | * Params : SCpnt - command to abort |
| 2644 | * Returns : one of SCSI_ABORT_ macros |
| 2645 | */ |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2646 | int acornscsi_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2647 | { |
| 2648 | AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; |
| 2649 | int result; |
| 2650 | |
| 2651 | host->stats.aborts += 1; |
| 2652 | |
| 2653 | #if (DEBUG & DEBUG_ABORT) |
| 2654 | { |
| 2655 | int asr, ssr; |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2656 | asr = sbic_arm_read(host, SBIC_ASR); |
| 2657 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2658 | |
| 2659 | printk(KERN_WARNING "acornscsi_abort: "); |
| 2660 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 2661 | acornscsi_dumplog(host, SCpnt->device->id); |
| 2662 | } |
| 2663 | #endif |
| 2664 | |
| 2665 | printk("scsi%d: ", host->host->host_no); |
| 2666 | |
| 2667 | switch (acornscsi_do_abort(host, SCpnt)) { |
| 2668 | /* |
| 2669 | * We managed to find the command and cleared it out. |
| 2670 | * We do not expect the command to be executing on the |
| 2671 | * target, but we have set the busylun bit. |
| 2672 | */ |
| 2673 | case res_success_clear: |
| 2674 | //#if (DEBUG & DEBUG_ABORT) |
| 2675 | printk("clear "); |
| 2676 | //#endif |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame^] | 2677 | clear_bit(SCpnt->device->id * 8 + |
| 2678 | (u8)(SCpnt->device->lun & 0x7), host->busyluns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2679 | |
| 2680 | /* |
| 2681 | * We found the command, and cleared it out. Either |
| 2682 | * the command is still known to be executing on the |
| 2683 | * target, or the busylun bit is not set. |
| 2684 | */ |
| 2685 | case res_success: |
| 2686 | //#if (DEBUG & DEBUG_ABORT) |
| 2687 | printk("success\n"); |
| 2688 | //#endif |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2689 | result = SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | break; |
| 2691 | |
| 2692 | /* |
| 2693 | * We did find the command, but unfortunately we couldn't |
| 2694 | * unhook it from ourselves. Wait some more, and if it |
| 2695 | * still doesn't complete, reset the interface. |
| 2696 | */ |
| 2697 | case res_snooze: |
| 2698 | //#if (DEBUG & DEBUG_ABORT) |
| 2699 | printk("snooze\n"); |
| 2700 | //#endif |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2701 | result = FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | break; |
| 2703 | |
| 2704 | /* |
| 2705 | * The command could not be found (either because it completed, |
| 2706 | * or it got dropped. |
| 2707 | */ |
| 2708 | default: |
| 2709 | case res_not_running: |
| 2710 | acornscsi_dumplog(host, SCpnt->device->id); |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2711 | result = FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | //#if (DEBUG & DEBUG_ABORT) |
| 2713 | printk("not running\n"); |
| 2714 | //#endif |
| 2715 | break; |
| 2716 | } |
| 2717 | |
| 2718 | return result; |
| 2719 | } |
| 2720 | |
| 2721 | /* |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2722 | * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | * Purpose : reset a command on this host/reset this host |
| 2724 | * Params : SCpnt - command causing reset |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2725 | * Returns : one of SCSI_RESET_ macros |
| 2726 | */ |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2727 | int acornscsi_bus_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | { |
Henne | ee0ca6b | 2006-10-01 13:18:37 +0200 | [diff] [blame] | 2729 | AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; |
| 2730 | struct scsi_cmnd *SCptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | |
| 2732 | host->stats.resets += 1; |
| 2733 | |
| 2734 | #if (DEBUG & DEBUG_RESET) |
| 2735 | { |
| 2736 | int asr, ssr; |
| 2737 | |
Russell King | ffd7858 | 2008-04-19 14:26:18 +0100 | [diff] [blame] | 2738 | asr = sbic_arm_read(host, SBIC_ASR); |
| 2739 | ssr = sbic_arm_read(host, SBIC_SSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | |
| 2741 | printk(KERN_WARNING "acornscsi_reset: "); |
| 2742 | print_sbic_status(asr, ssr, host->scsi.phase); |
| 2743 | acornscsi_dumplog(host, SCpnt->device->id); |
| 2744 | } |
| 2745 | #endif |
| 2746 | |
| 2747 | acornscsi_dma_stop(host); |
| 2748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | /* |
| 2750 | * do hard reset. This resets all devices on this host, and so we |
| 2751 | * must set the reset status on all commands. |
| 2752 | */ |
| 2753 | acornscsi_resetcard(host); |
| 2754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2756 | ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2758 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | } |
| 2760 | |
| 2761 | /*============================================================================================== |
| 2762 | * initialisation & miscellaneous support |
| 2763 | */ |
| 2764 | |
| 2765 | /* |
| 2766 | * Function: char *acornscsi_info(struct Scsi_Host *host) |
| 2767 | * Purpose : return a string describing this interface |
| 2768 | * Params : host - host to give information on |
| 2769 | * Returns : a constant string |
| 2770 | */ |
| 2771 | const |
| 2772 | char *acornscsi_info(struct Scsi_Host *host) |
| 2773 | { |
| 2774 | static char string[100], *p; |
| 2775 | |
| 2776 | p = string; |
| 2777 | |
| 2778 | p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" |
| 2779 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 2780 | " SYNC" |
| 2781 | #endif |
| 2782 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 2783 | " TAG" |
| 2784 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | #if (DEBUG & DEBUG_NO_WRITE) |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 2786 | " NOWRITE (" __stringify(NO_WRITE) ")" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | #endif |
| 2788 | , host->hostt->name, host->io_port, host->irq, |
| 2789 | VER_MAJOR, VER_MINOR, VER_PATCH); |
| 2790 | return string; |
| 2791 | } |
| 2792 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2793 | static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | { |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2795 | int devidx; |
Christoph Hellwig | f64a181 | 2005-10-31 18:32:08 +0100 | [diff] [blame] | 2796 | struct scsi_device *scd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | AS_Host *host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | |
| 2799 | host = (AS_Host *)instance->hostdata; |
| 2800 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2801 | seq_printf(m, "AcornSCSI driver v%d.%d.%d" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | #ifdef CONFIG_SCSI_ACORNSCSI_SYNC |
| 2803 | " SYNC" |
| 2804 | #endif |
| 2805 | #ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE |
| 2806 | " TAG" |
| 2807 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2808 | #if (DEBUG & DEBUG_NO_WRITE) |
Russell King | a796ef7 | 2008-04-19 15:37:44 +0100 | [diff] [blame] | 2809 | " NOWRITE (" __stringify(NO_WRITE) ")" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | #endif |
| 2811 | "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); |
| 2812 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2813 | seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n", |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2814 | host->base + SBIC_REGIDX, host->scsi.irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | #ifdef USE_DMAC |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2816 | seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n", |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2817 | host->base + DMAC_OFFSET, host->scsi.irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | #endif |
| 2819 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2820 | seq_printf(m, "Statistics:\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | "Queued commands: %-10u Issued commands: %-10u\n" |
| 2822 | "Done commands : %-10u Reads : %-10u\n" |
| 2823 | "Writes : %-10u Others : %-10u\n" |
| 2824 | "Disconnects : %-10u Aborts : %-10u\n" |
| 2825 | "Resets : %-10u\n\nLast phases:", |
| 2826 | host->stats.queues, host->stats.removes, |
| 2827 | host->stats.fins, host->stats.reads, |
| 2828 | host->stats.writes, host->stats.miscs, |
| 2829 | host->stats.disconnects, host->stats.aborts, |
| 2830 | host->stats.resets); |
| 2831 | |
| 2832 | for (devidx = 0; devidx < 9; devidx ++) { |
| 2833 | unsigned int statptr, prev; |
| 2834 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2835 | seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | statptr = host->status_ptr[devidx] - 10; |
| 2837 | |
| 2838 | if ((signed int)statptr < 0) |
| 2839 | statptr += STATUS_BUFFER_SIZE; |
| 2840 | |
| 2841 | prev = host->status[devidx][statptr].when; |
| 2842 | |
| 2843 | for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { |
| 2844 | if (host->status[devidx][statptr].when) { |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2845 | seq_printf(m, "%c%02X:%02X+%2ld", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2846 | host->status[devidx][statptr].irq ? '-' : ' ', |
| 2847 | host->status[devidx][statptr].ph, |
| 2848 | host->status[devidx][statptr].ssr, |
| 2849 | (host->status[devidx][statptr].when - prev) < 100 ? |
| 2850 | (host->status[devidx][statptr].when - prev) : 99); |
| 2851 | prev = host->status[devidx][statptr].when; |
| 2852 | } |
| 2853 | } |
| 2854 | } |
| 2855 | |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2856 | seq_printf(m, "\nAttached devices:\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | |
| 2858 | shost_for_each_device(scd, instance) { |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2859 | seq_printf(m, "Device/Lun TaggedQ Sync\n"); |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame^] | 2860 | seq_printf(m, " %d/%llu ", scd->id, scd->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | if (scd->tagged_supported) |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2862 | seq_printf(m, "%3sabled(%3d) ", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | scd->simple_tags ? "en" : "dis", |
| 2864 | scd->current_tag); |
| 2865 | else |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2866 | seq_printf(m, "unsupported "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | |
| 2868 | if (host->device[scd->id].sync_xfer & 15) |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2869 | seq_printf(m, "offset %d, %d ns\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | host->device[scd->id].sync_xfer & 15, |
| 2871 | acornscsi_getperiod(host->device[scd->id].sync_xfer)); |
| 2872 | else |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2873 | seq_printf(m, "async\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2875 | } |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2876 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | } |
| 2878 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 2879 | static struct scsi_host_template acornscsi_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | .module = THIS_MODULE, |
Al Viro | 56b8e8e | 2013-03-31 12:02:39 -0400 | [diff] [blame] | 2881 | .show_info = acornscsi_show_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2882 | .name = "AcornSCSI", |
| 2883 | .info = acornscsi_info, |
| 2884 | .queuecommand = acornscsi_queuecmd, |
Russell King | 324b9337 | 2008-04-19 15:13:45 +0100 | [diff] [blame] | 2885 | .eh_abort_handler = acornscsi_abort, |
| 2886 | .eh_bus_reset_handler = acornscsi_bus_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | .can_queue = 16, |
| 2888 | .this_id = 7, |
| 2889 | .sg_tablesize = SG_ALL, |
| 2890 | .cmd_per_lun = 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | .use_clustering = DISABLE_CLUSTERING, |
| 2892 | .proc_name = "acornscsi", |
| 2893 | }; |
| 2894 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 2895 | static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2896 | { |
| 2897 | struct Scsi_Host *host; |
| 2898 | AS_Host *ashost; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2899 | int ret; |
| 2900 | |
| 2901 | ret = ecard_request_resources(ec); |
| 2902 | if (ret) |
| 2903 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2904 | |
| 2905 | host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2906 | if (!host) { |
| 2907 | ret = -ENOMEM; |
| 2908 | goto out_release; |
| 2909 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | |
| 2911 | ashost = (AS_Host *)host->hostdata; |
| 2912 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2913 | ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); |
| 2914 | ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); |
| 2915 | if (!ashost->base || !ashost->fast) |
| 2916 | goto out_put; |
| 2917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2918 | host->irq = ec->irq; |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2919 | ashost->host = host; |
| 2920 | ashost->scsi.irq = host->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2921 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2922 | ec->irqaddr = ashost->fast + INT_REG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2923 | ec->irqmask = 0x0a; |
| 2924 | |
Michael Opdenacker | 4909cc2 | 2014-03-05 06:09:41 +0100 | [diff] [blame] | 2925 | ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | if (ret) { |
| 2927 | printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", |
| 2928 | host->host_no, ashost->scsi.irq, ret); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2929 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | } |
| 2931 | |
| 2932 | memset(&ashost->stats, 0, sizeof (ashost->stats)); |
| 2933 | queue_initialise(&ashost->queues.issue); |
| 2934 | queue_initialise(&ashost->queues.disconnected); |
| 2935 | msgqueue_initialise(&ashost->scsi.msgs); |
| 2936 | |
| 2937 | acornscsi_resetcard(ashost); |
| 2938 | |
| 2939 | ret = scsi_add_host(host, &ec->dev); |
| 2940 | if (ret) |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2941 | goto out_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2942 | |
| 2943 | scsi_scan_host(host); |
| 2944 | goto out; |
| 2945 | |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2946 | out_irq: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2947 | free_irq(host->irq, ashost); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2948 | msgqueue_free(&ashost->scsi.msgs); |
| 2949 | queue_free(&ashost->queues.disconnected); |
| 2950 | queue_free(&ashost->queues.issue); |
| 2951 | out_put: |
| 2952 | ecardm_iounmap(ec, ashost->fast); |
| 2953 | ecardm_iounmap(ec, ashost->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | scsi_host_put(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2955 | out_release: |
| 2956 | ecard_release_resources(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2957 | out: |
| 2958 | return ret; |
| 2959 | } |
| 2960 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 2961 | static void acornscsi_remove(struct expansion_card *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | { |
| 2963 | struct Scsi_Host *host = ecard_get_drvdata(ec); |
| 2964 | AS_Host *ashost = (AS_Host *)host->hostdata; |
| 2965 | |
| 2966 | ecard_set_drvdata(ec, NULL); |
| 2967 | scsi_remove_host(host); |
| 2968 | |
| 2969 | /* |
| 2970 | * Put card into RESET state |
| 2971 | */ |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2972 | writeb(0x80, ashost->fast + PAGE_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2973 | |
| 2974 | free_irq(host->irq, ashost); |
| 2975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | msgqueue_free(&ashost->scsi.msgs); |
| 2977 | queue_free(&ashost->queues.disconnected); |
| 2978 | queue_free(&ashost->queues.issue); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2979 | ecardm_iounmap(ec, ashost->fast); |
| 2980 | ecardm_iounmap(ec, ashost->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | scsi_host_put(host); |
Russell King | e95a1b6 | 2008-04-19 15:42:57 +0100 | [diff] [blame] | 2982 | ecard_release_resources(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | } |
| 2984 | |
| 2985 | static const struct ecard_id acornscsi_cids[] = { |
| 2986 | { MANU_ACORN, PROD_ACORN_SCSI }, |
| 2987 | { 0xffff, 0xffff }, |
| 2988 | }; |
| 2989 | |
| 2990 | static struct ecard_driver acornscsi_driver = { |
| 2991 | .probe = acornscsi_probe, |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 2992 | .remove = acornscsi_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2993 | .id_table = acornscsi_cids, |
| 2994 | .drv = { |
| 2995 | .name = "acornscsi", |
| 2996 | }, |
| 2997 | }; |
| 2998 | |
| 2999 | static int __init acornscsi_init(void) |
| 3000 | { |
| 3001 | return ecard_register_driver(&acornscsi_driver); |
| 3002 | } |
| 3003 | |
| 3004 | static void __exit acornscsi_exit(void) |
| 3005 | { |
| 3006 | ecard_remove_driver(&acornscsi_driver); |
| 3007 | } |
| 3008 | |
| 3009 | module_init(acornscsi_init); |
| 3010 | module_exit(acornscsi_exit); |
| 3011 | |
| 3012 | MODULE_AUTHOR("Russell King"); |
| 3013 | MODULE_DESCRIPTION("AcornSCSI driver"); |
| 3014 | MODULE_LICENSE("GPL"); |