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3e0a4e85 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) 1996 John Shifflett, GeoLog Consulting | |
4 | * john@geolog.com | |
5 | * jshiffle@netcom.com | |
1da177e4 LT |
6 | */ |
7 | ||
8 | /* | |
9 | * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC | |
10 | * provided much of the inspiration and some of the code for this | |
11 | * driver. Everything I know about Amiga DMA was gleaned from careful | |
12 | * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I | |
13 | * borrowed shamelessly from all over that source. Thanks Hamish! | |
14 | * | |
15 | * _This_ driver is (I feel) an improvement over the old one in | |
16 | * several respects: | |
17 | * | |
18 | * - Target Disconnection/Reconnection is now supported. Any | |
19 | * system with more than one device active on the SCSI bus | |
20 | * will benefit from this. The driver defaults to what I | |
21 | * call 'adaptive disconnect' - meaning that each command | |
22 | * is evaluated individually as to whether or not it should | |
23 | * be run with the option to disconnect/reselect (if the | |
24 | * device chooses), or as a "SCSI-bus-hog". | |
25 | * | |
26 | * - Synchronous data transfers are now supported. Because of | |
27 | * a few devices that choke after telling the driver that | |
28 | * they can do sync transfers, we don't automatically use | |
29 | * this faster protocol - it can be enabled via the command- | |
30 | * line on a device-by-device basis. | |
31 | * | |
32 | * - Runtime operating parameters can now be specified through | |
33 | * the 'amiboot' or the 'insmod' command line. For amiboot do: | |
34 | * "amiboot [usual stuff] wd33c93=blah,blah,blah" | |
35 | * The defaults should be good for most people. See the comment | |
36 | * for 'setup_strings' below for more details. | |
37 | * | |
38 | * - The old driver relied exclusively on what the Western Digital | |
39 | * docs call "Combination Level 2 Commands", which are a great | |
40 | * idea in that the CPU is relieved of a lot of interrupt | |
41 | * overhead. However, by accepting a certain (user-settable) | |
42 | * amount of additional interrupts, this driver achieves | |
43 | * better control over the SCSI bus, and data transfers are | |
44 | * almost as fast while being much easier to define, track, | |
45 | * and debug. | |
46 | * | |
47 | * | |
48 | * TODO: | |
49 | * more speed. linked commands. | |
50 | * | |
51 | * | |
52 | * People with bug reports, wish-lists, complaints, comments, | |
53 | * or improvements are asked to pah-leeez email me (John Shifflett) | |
54 | * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get | |
55 | * this thing into as good a shape as possible, and I'm positive | |
56 | * there are lots of lurking bugs and "Stupid Places". | |
57 | * | |
58 | * Updates: | |
59 | * | |
60 | * Added support for pre -A chips, which don't have advanced features | |
61 | * and will generate CSR_RESEL rather than CSR_RESEL_AM. | |
62 | * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 | |
a5d8421b | 63 | * |
64 | * Added support for Burst Mode DMA and Fast SCSI. Enabled the use of | |
65 | * default_sx_per for asynchronous data transfers. Added adjustment | |
66 | * of transfer periods in sx_table to the actual input-clock. | |
67 | * peter fuerst <post@pfrst.de> February 2007 | |
1da177e4 LT |
68 | */ |
69 | ||
1da177e4 LT |
70 | #include <linux/module.h> |
71 | ||
1da177e4 LT |
72 | #include <linux/string.h> |
73 | #include <linux/delay.h> | |
1da177e4 | 74 | #include <linux/init.h> |
cf7f5b45 | 75 | #include <linux/interrupt.h> |
1da177e4 | 76 | #include <linux/blkdev.h> |
1da177e4 LT |
77 | |
78 | #include <scsi/scsi.h> | |
79 | #include <scsi/scsi_cmnd.h> | |
80 | #include <scsi/scsi_device.h> | |
81 | #include <scsi/scsi_host.h> | |
82 | ||
078dda95 AB |
83 | #include <asm/irq.h> |
84 | ||
1da177e4 LT |
85 | #include "wd33c93.h" |
86 | ||
a5d8421b | 87 | #define optimum_sx_per(hostdata) (hostdata)->sx_table[1].period_ns |
88 | ||
1da177e4 | 89 | |
a5d8421b | 90 | #define WD33C93_VERSION "1.26++" |
91 | #define WD33C93_DATE "10/Feb/2007" | |
1da177e4 LT |
92 | |
93 | MODULE_AUTHOR("John Shifflett"); | |
94 | MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); | |
95 | MODULE_LICENSE("GPL"); | |
96 | ||
97 | /* | |
98 | * 'setup_strings' is a single string used to pass operating parameters and | |
99 | * settings from the kernel/module command-line to the driver. 'setup_args[]' | |
100 | * is an array of strings that define the compile-time default values for | |
101 | * these settings. If Linux boots with an amiboot or insmod command-line, | |
102 | * those settings are combined with 'setup_args[]'. Note that amiboot | |
103 | * command-lines are prefixed with "wd33c93=" while insmod uses a | |
104 | * "setup_strings=" prefix. The driver recognizes the following keywords | |
105 | * (lower case required) and arguments: | |
106 | * | |
107 | * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with | |
108 | * the 7 possible SCSI devices. Set a bit to negotiate for | |
109 | * asynchronous transfers on that device. To maintain | |
110 | * backwards compatibility, a command-line such as | |
111 | * "wd33c93=255" will be automatically translated to | |
112 | * "wd33c93=nosync:0xff". | |
113 | * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is | |
114 | * optional - if not present, same as "nodma:1". | |
115 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer | |
116 | * period. Default is 500; acceptable values are 250 - 1000. | |
117 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. | |
118 | * x = 1 does 'adaptive' disconnects, which is the default | |
119 | * and generally the best choice. | |
120 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes | |
121 | * various types of debug output to printed - see the DB_xxx | |
122 | * defines in wd33c93.h | |
123 | * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values | |
124 | * would be from 8 through 20. Default is 8. | |
a5d8421b | 125 | * - burst:x -x = 1 to use Burst Mode (or Demand-Mode) DMA, x = 0 to use |
126 | * Single Byte DMA, which is the default. Argument is | |
127 | * optional - if not present, same as "burst:1". | |
128 | * - fast:x -x = 1 to enable Fast SCSI, which is only effective with | |
129 | * input-clock divisor 4 (WD33C93_FS_16_20), x = 0 to disable | |
130 | * it, which is the default. Argument is optional - if not | |
131 | * present, same as "fast:1". | |
1da177e4 LT |
132 | * - next -No argument. Used to separate blocks of keywords when |
133 | * there's more than one host adapter in the system. | |
134 | * | |
135 | * Syntax Notes: | |
136 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There | |
137 | * _must_ be a colon between a keyword and its numeric argument, with no | |
138 | * spaces. | |
139 | * - Keywords are separated by commas, no spaces, in the standard kernel | |
140 | * command-line manner. | |
141 | * - A keyword in the 'nth' comma-separated command-line member will overwrite | |
142 | * the 'nth' element of setup_args[]. A blank command-line member (in | |
143 | * other words, a comma with no preceding keyword) will _not_ overwrite | |
144 | * the corresponding setup_args[] element. | |
145 | * - If a keyword is used more than once, the first one applies to the first | |
146 | * SCSI host found, the second to the second card, etc, unless the 'next' | |
147 | * keyword is used to change the order. | |
148 | * | |
149 | * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): | |
150 | * - wd33c93=nosync:255 | |
151 | * - wd33c93=nodma | |
152 | * - wd33c93=nodma:1 | |
153 | * - wd33c93=disconnect:2,nosync:0x08,period:250 | |
154 | * - wd33c93=debug:0x1c | |
155 | */ | |
156 | ||
157 | /* Normally, no defaults are specified */ | |
a5d8421b | 158 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "", "" }; |
1da177e4 LT |
159 | |
160 | static char *setup_strings; | |
161 | module_param(setup_strings, charp, 0); | |
162 | ||
163 | static void wd33c93_execute(struct Scsi_Host *instance); | |
164 | ||
1da177e4 LT |
165 | static inline uchar |
166 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) | |
167 | { | |
168 | *regs.SASR = reg_num; | |
169 | mb(); | |
170 | return (*regs.SCMD); | |
171 | } | |
172 | ||
173 | static unsigned long | |
174 | read_wd33c93_count(const wd33c93_regs regs) | |
175 | { | |
176 | unsigned long value; | |
177 | ||
178 | *regs.SASR = WD_TRANSFER_COUNT_MSB; | |
179 | mb(); | |
180 | value = *regs.SCMD << 16; | |
181 | value |= *regs.SCMD << 8; | |
182 | value |= *regs.SCMD; | |
183 | mb(); | |
184 | return value; | |
185 | } | |
186 | ||
187 | static inline uchar | |
188 | read_aux_stat(const wd33c93_regs regs) | |
189 | { | |
190 | return *regs.SASR; | |
191 | } | |
192 | ||
193 | static inline void | |
194 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) | |
195 | { | |
196 | *regs.SASR = reg_num; | |
197 | mb(); | |
198 | *regs.SCMD = value; | |
199 | mb(); | |
200 | } | |
201 | ||
202 | static void | |
203 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) | |
204 | { | |
205 | *regs.SASR = WD_TRANSFER_COUNT_MSB; | |
206 | mb(); | |
207 | *regs.SCMD = value >> 16; | |
208 | *regs.SCMD = value >> 8; | |
209 | *regs.SCMD = value; | |
210 | mb(); | |
211 | } | |
212 | ||
213 | static inline void | |
214 | write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) | |
215 | { | |
216 | *regs.SASR = WD_COMMAND; | |
217 | mb(); | |
218 | *regs.SCMD = cmd; | |
219 | mb(); | |
220 | } | |
221 | ||
222 | static inline void | |
223 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) | |
224 | { | |
225 | int i; | |
226 | ||
227 | *regs.SASR = WD_CDB_1; | |
228 | for (i = 0; i < len; i++) | |
229 | *regs.SCMD = cmnd[i]; | |
230 | } | |
1da177e4 LT |
231 | |
232 | static inline uchar | |
233 | read_1_byte(const wd33c93_regs regs) | |
234 | { | |
235 | uchar asr; | |
236 | uchar x = 0; | |
237 | ||
238 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
239 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); | |
240 | do { | |
241 | asr = read_aux_stat(regs); | |
242 | if (asr & ASR_DBR) | |
243 | x = read_wd33c93(regs, WD_DATA); | |
244 | } while (!(asr & ASR_INT)); | |
245 | return x; | |
246 | } | |
247 | ||
1da177e4 | 248 | static int |
a5d8421b | 249 | round_period(unsigned int period, const struct sx_period *sx_table) |
1da177e4 LT |
250 | { |
251 | int x; | |
252 | ||
253 | for (x = 1; sx_table[x].period_ns; x++) { | |
254 | if ((period <= sx_table[x - 0].period_ns) && | |
255 | (period > sx_table[x - 1].period_ns)) { | |
256 | return x; | |
257 | } | |
258 | } | |
259 | return 7; | |
260 | } | |
261 | ||
a5d8421b | 262 | /* |
263 | * Calculate Synchronous Transfer Register value from SDTR code. | |
264 | */ | |
1da177e4 | 265 | static uchar |
a5d8421b | 266 | calc_sync_xfer(unsigned int period, unsigned int offset, unsigned int fast, |
267 | const struct sx_period *sx_table) | |
1da177e4 | 268 | { |
a5d8421b | 269 | /* When doing Fast SCSI synchronous data transfers, the corresponding |
270 | * value in 'sx_table' is two times the actually used transfer period. | |
271 | */ | |
1da177e4 LT |
272 | uchar result; |
273 | ||
a5d8421b | 274 | if (offset && fast) { |
275 | fast = STR_FSS; | |
276 | period *= 2; | |
277 | } else { | |
278 | fast = 0; | |
279 | } | |
1da177e4 | 280 | period *= 4; /* convert SDTR code to ns */ |
a5d8421b | 281 | result = sx_table[round_period(period,sx_table)].reg_value; |
1da177e4 | 282 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
a5d8421b | 283 | result |= fast; |
1da177e4 LT |
284 | return result; |
285 | } | |
286 | ||
a5d8421b | 287 | /* |
288 | * Calculate SDTR code bytes [3],[4] from period and offset. | |
289 | */ | |
290 | static inline void | |
291 | calc_sync_msg(unsigned int period, unsigned int offset, unsigned int fast, | |
292 | uchar msg[2]) | |
293 | { | |
294 | /* 'period' is a "normal"-mode value, like the ones in 'sx_table'. The | |
295 | * actually used transfer period for Fast SCSI synchronous data | |
296 | * transfers is half that value. | |
297 | */ | |
298 | period /= 4; | |
299 | if (offset && fast) | |
300 | period /= 2; | |
301 | msg[0] = period; | |
302 | msg[1] = offset; | |
303 | } | |
304 | ||
af049dfd | 305 | static int wd33c93_queuecommand_lck(struct scsi_cmnd *cmd) |
1da177e4 | 306 | { |
dbb2da55 | 307 | struct scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(cmd); |
1da177e4 LT |
308 | struct WD33C93_hostdata *hostdata; |
309 | struct scsi_cmnd *tmp; | |
310 | ||
311 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; | |
312 | ||
313 | DB(DB_QUEUE_COMMAND, | |
5cd049a5 | 314 | printk("Q-%d-%02x( ", cmd->device->id, cmd->cmnd[0])) |
1da177e4 LT |
315 | |
316 | /* Set up a few fields in the scsi_cmnd structure for our own use: | |
317 | * - host_scribble is the pointer to the next cmd in the input queue | |
1da177e4 LT |
318 | * - result is what you'd expect |
319 | */ | |
320 | cmd->host_scribble = NULL; | |
1da177e4 LT |
321 | cmd->result = 0; |
322 | ||
323 | /* We use the Scsi_Pointer structure that's included with each command | |
324 | * as a scratchpad (as it's intended to be used!). The handy thing about | |
325 | * the SCp.xxx fields is that they're always associated with a given | |
326 | * cmd, and are preserved across disconnect-reselect. This means we | |
327 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages | |
328 | * if we keep all the critical pointers and counters in SCp: | |
329 | * - SCp.ptr is the pointer into the RAM buffer | |
330 | * - SCp.this_residual is the size of that buffer | |
331 | * - SCp.buffer points to the current scatter-gather buffer | |
332 | * - SCp.buffers_residual tells us how many S.G. buffers there are | |
333 | * - SCp.have_data_in is not used | |
334 | * - SCp.sent_command is not used | |
335 | * - SCp.phase records this command's SRCID_ER bit setting | |
336 | */ | |
337 | ||
ee0ae927 | 338 | if (scsi_bufflen(cmd)) { |
dbb2da55 BVA |
339 | scsi_pointer->buffer = scsi_sglist(cmd); |
340 | scsi_pointer->buffers_residual = scsi_sg_count(cmd) - 1; | |
341 | scsi_pointer->ptr = sg_virt(scsi_pointer->buffer); | |
342 | scsi_pointer->this_residual = scsi_pointer->buffer->length; | |
1da177e4 | 343 | } else { |
dbb2da55 BVA |
344 | scsi_pointer->buffer = NULL; |
345 | scsi_pointer->buffers_residual = 0; | |
346 | scsi_pointer->ptr = NULL; | |
347 | scsi_pointer->this_residual = 0; | |
1da177e4 LT |
348 | } |
349 | ||
350 | /* WD docs state that at the conclusion of a "LEVEL2" command, the | |
351 | * status byte can be retrieved from the LUN register. Apparently, | |
352 | * this is the case only for *uninterrupted* LEVEL2 commands! If | |
353 | * there are any unexpected phases entered, even if they are 100% | |
354 | * legal (different devices may choose to do things differently), | |
355 | * the LEVEL2 command sequence is exited. This often occurs prior | |
356 | * to receiving the status byte, in which case the driver does a | |
357 | * status phase interrupt and gets the status byte on its own. | |
358 | * While such a command can then be "resumed" (ie restarted to | |
359 | * finish up as a LEVEL2 command), the LUN register will NOT be | |
360 | * a valid status byte at the command's conclusion, and we must | |
361 | * use the byte obtained during the earlier interrupt. Here, we | |
362 | * preset SCp.Status to an illegal value (0xff) so that when | |
363 | * this command finally completes, we can tell where the actual | |
364 | * status byte is stored. | |
365 | */ | |
366 | ||
dbb2da55 | 367 | scsi_pointer->Status = ILLEGAL_STATUS_BYTE; |
1da177e4 LT |
368 | |
369 | /* | |
370 | * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE | |
371 | * commands are added to the head of the queue so that the desired | |
372 | * sense data is not lost before REQUEST_SENSE executes. | |
373 | */ | |
374 | ||
375 | spin_lock_irq(&hostdata->lock); | |
376 | ||
377 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { | |
378 | cmd->host_scribble = (uchar *) hostdata->input_Q; | |
379 | hostdata->input_Q = cmd; | |
380 | } else { /* find the end of the queue */ | |
381 | for (tmp = (struct scsi_cmnd *) hostdata->input_Q; | |
382 | tmp->host_scribble; | |
383 | tmp = (struct scsi_cmnd *) tmp->host_scribble) ; | |
384 | tmp->host_scribble = (uchar *) cmd; | |
385 | } | |
386 | ||
387 | /* We know that there's at least one command in 'input_Q' now. | |
388 | * Go see if any of them are runnable! | |
389 | */ | |
390 | ||
391 | wd33c93_execute(cmd->device->host); | |
392 | ||
5cd049a5 | 393 | DB(DB_QUEUE_COMMAND, printk(")Q ")) |
1da177e4 LT |
394 | |
395 | spin_unlock_irq(&hostdata->lock); | |
396 | return 0; | |
397 | } | |
398 | ||
f281233d JG |
399 | DEF_SCSI_QCMD(wd33c93_queuecommand) |
400 | ||
1da177e4 LT |
401 | /* |
402 | * This routine attempts to start a scsi command. If the host_card is | |
403 | * already connected, we give up immediately. Otherwise, look through | |
404 | * the input_Q, using the first command we find that's intended | |
405 | * for a currently non-busy target/lun. | |
406 | * | |
407 | * wd33c93_execute() is always called with interrupts disabled or from | |
408 | * the wd33c93_intr itself, which means that a wd33c93 interrupt | |
409 | * cannot occur while we are in here. | |
410 | */ | |
411 | static void | |
412 | wd33c93_execute(struct Scsi_Host *instance) | |
413 | { | |
dbb2da55 | 414 | struct scsi_pointer *scsi_pointer; |
1da177e4 LT |
415 | struct WD33C93_hostdata *hostdata = |
416 | (struct WD33C93_hostdata *) instance->hostdata; | |
417 | const wd33c93_regs regs = hostdata->regs; | |
418 | struct scsi_cmnd *cmd, *prev; | |
419 | ||
420 | DB(DB_EXECUTE, printk("EX(")) | |
421 | if (hostdata->selecting || hostdata->connected) { | |
422 | DB(DB_EXECUTE, printk(")EX-0 ")) | |
423 | return; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Search through the input_Q for a command destined | |
428 | * for an idle target/lun. | |
429 | */ | |
430 | ||
431 | cmd = (struct scsi_cmnd *) hostdata->input_Q; | |
a5d361fc | 432 | prev = NULL; |
1da177e4 | 433 | while (cmd) { |
9cb78c16 HR |
434 | if (!(hostdata->busy[cmd->device->id] & |
435 | (1 << (cmd->device->lun & 0xff)))) | |
1da177e4 LT |
436 | break; |
437 | prev = cmd; | |
438 | cmd = (struct scsi_cmnd *) cmd->host_scribble; | |
439 | } | |
440 | ||
441 | /* quit if queue empty or all possible targets are busy */ | |
442 | ||
443 | if (!cmd) { | |
444 | DB(DB_EXECUTE, printk(")EX-1 ")) | |
445 | return; | |
446 | } | |
447 | ||
448 | /* remove command from queue */ | |
449 | ||
450 | if (prev) | |
451 | prev->host_scribble = cmd->host_scribble; | |
452 | else | |
453 | hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; | |
454 | ||
455 | #ifdef PROC_STATISTICS | |
456 | hostdata->cmd_cnt[cmd->device->id]++; | |
457 | #endif | |
458 | ||
459 | /* | |
460 | * Start the selection process | |
461 | */ | |
462 | ||
463 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
464 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); | |
465 | else | |
466 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); | |
467 | ||
468 | /* Now we need to figure out whether or not this command is a good | |
469 | * candidate for disconnect/reselect. We guess to the best of our | |
470 | * ability, based on a set of hierarchical rules. When several | |
471 | * devices are operating simultaneously, disconnects are usually | |
472 | * an advantage. In a single device system, or if only 1 device | |
473 | * is being accessed, transfers usually go faster if disconnects | |
474 | * are not allowed: | |
475 | * | |
476 | * + Commands should NEVER disconnect if hostdata->disconnect = | |
477 | * DIS_NEVER (this holds for tape drives also), and ALWAYS | |
478 | * disconnect if hostdata->disconnect = DIS_ALWAYS. | |
479 | * + Tape drive commands should always be allowed to disconnect. | |
480 | * + Disconnect should be allowed if disconnected_Q isn't empty. | |
481 | * + Commands should NOT disconnect if input_Q is empty. | |
482 | * + Disconnect should be allowed if there are commands in input_Q | |
483 | * for a different target/lun. In this case, the other commands | |
484 | * should be made disconnect-able, if not already. | |
485 | * | |
486 | * I know, I know - this code would flunk me out of any | |
487 | * "C Programming 101" class ever offered. But it's easy | |
488 | * to change around and experiment with for now. | |
489 | */ | |
490 | ||
dbb2da55 BVA |
491 | scsi_pointer = WD33C93_scsi_pointer(cmd); |
492 | scsi_pointer->phase = 0; /* assume no disconnect */ | |
1da177e4 LT |
493 | if (hostdata->disconnect == DIS_NEVER) |
494 | goto no; | |
495 | if (hostdata->disconnect == DIS_ALWAYS) | |
496 | goto yes; | |
497 | if (cmd->device->type == 1) /* tape drive? */ | |
498 | goto yes; | |
499 | if (hostdata->disconnected_Q) /* other commands disconnected? */ | |
500 | goto yes; | |
501 | if (!(hostdata->input_Q)) /* input_Q empty? */ | |
502 | goto no; | |
503 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; | |
504 | prev = (struct scsi_cmnd *) prev->host_scribble) { | |
505 | if ((prev->device->id != cmd->device->id) || | |
506 | (prev->device->lun != cmd->device->lun)) { | |
507 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; | |
508 | prev = (struct scsi_cmnd *) prev->host_scribble) | |
dbb2da55 | 509 | WD33C93_scsi_pointer(prev)->phase = 1; |
1da177e4 LT |
510 | goto yes; |
511 | } | |
512 | } | |
513 | ||
514 | goto no; | |
515 | ||
516 | yes: | |
dbb2da55 | 517 | scsi_pointer->phase = 1; |
1da177e4 LT |
518 | |
519 | #ifdef PROC_STATISTICS | |
520 | hostdata->disc_allowed_cnt[cmd->device->id]++; | |
521 | #endif | |
522 | ||
523 | no: | |
524 | ||
dbb2da55 | 525 | write_wd33c93(regs, WD_SOURCE_ID, scsi_pointer->phase ? SRCID_ER : 0); |
1da177e4 | 526 | |
9cb78c16 | 527 | write_wd33c93(regs, WD_TARGET_LUN, (u8)cmd->device->lun); |
1da177e4 LT |
528 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
529 | hostdata->sync_xfer[cmd->device->id]); | |
9cb78c16 | 530 | hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF)); |
1da177e4 LT |
531 | |
532 | if ((hostdata->level2 == L2_NONE) || | |
533 | (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { | |
534 | ||
535 | /* | |
536 | * Do a 'Select-With-ATN' command. This will end with | |
537 | * one of the following interrupts: | |
538 | * CSR_RESEL_AM: failure - can try again later. | |
539 | * CSR_TIMEOUT: failure - give up. | |
540 | * CSR_SELECT: success - proceed. | |
541 | */ | |
542 | ||
543 | hostdata->selecting = cmd; | |
544 | ||
545 | /* Every target has its own synchronous transfer setting, kept in the | |
546 | * sync_xfer array, and a corresponding status byte in sync_stat[]. | |
547 | * Each target's sync_stat[] entry is initialized to SX_UNSET, and its | |
548 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET | |
549 | * means that the parameters are undetermined as yet, and that we | |
550 | * need to send an SDTR message to this device after selection is | |
551 | * complete: We set SS_FIRST to tell the interrupt routine to do so. | |
552 | * If we've been asked not to try synchronous transfers on this | |
553 | * target (and _all_ luns within it), we'll still send the SDTR message | |
554 | * later, but at that time we'll negotiate for async by specifying a | |
555 | * sync fifo depth of 0. | |
556 | */ | |
557 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) | |
558 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; | |
559 | hostdata->state = S_SELECTING; | |
560 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
561 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); | |
562 | } else { | |
563 | ||
564 | /* | |
565 | * Do a 'Select-With-ATN-Xfer' command. This will end with | |
566 | * one of the following interrupts: | |
567 | * CSR_RESEL_AM: failure - can try again later. | |
568 | * CSR_TIMEOUT: failure - give up. | |
569 | * anything else: success - proceed. | |
570 | */ | |
571 | ||
572 | hostdata->connected = cmd; | |
573 | write_wd33c93(regs, WD_COMMAND_PHASE, 0); | |
574 | ||
575 | /* copy command_descriptor_block into WD chip | |
576 | * (take advantage of auto-incrementing) | |
577 | */ | |
578 | ||
579 | write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); | |
580 | ||
581 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when | |
582 | * it's doing a 'select-and-transfer'. To be safe, we write the | |
583 | * size of the CDB into the OWN_ID register for every case. This | |
584 | * way there won't be problems with vendor-unique, audio, etc. | |
585 | */ | |
586 | ||
587 | write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); | |
588 | ||
589 | /* When doing a non-disconnect command with DMA, we can save | |
590 | * ourselves a DATA phase interrupt later by setting everything | |
591 | * up ahead of time. | |
592 | */ | |
593 | ||
dbb2da55 | 594 | if (scsi_pointer->phase == 0 && hostdata->no_dma == 0) { |
1da177e4 LT |
595 | if (hostdata->dma_setup(cmd, |
596 | (cmd->sc_data_direction == DMA_TO_DEVICE) ? | |
597 | DATA_OUT_DIR : DATA_IN_DIR)) | |
598 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
599 | else { | |
600 | write_wd33c93_count(regs, | |
dbb2da55 | 601 | scsi_pointer->this_residual); |
1da177e4 | 602 | write_wd33c93(regs, WD_CONTROL, |
a5d8421b | 603 | CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
1da177e4 LT |
604 | hostdata->dma = D_DMA_RUNNING; |
605 | } | |
606 | } else | |
607 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
608 | ||
609 | hostdata->state = S_RUNNING_LEVEL2; | |
610 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
611 | } | |
612 | ||
613 | /* | |
614 | * Since the SCSI bus can handle only 1 connection at a time, | |
615 | * we get out of here now. If the selection fails, or when | |
616 | * the command disconnects, we'll come back to this routine | |
617 | * to search the input_Q again... | |
618 | */ | |
619 | ||
620 | DB(DB_EXECUTE, | |
dbb2da55 | 621 | printk("%s)EX-2 ", scsi_pointer->phase ? "d:" : "")) |
1da177e4 LT |
622 | } |
623 | ||
624 | static void | |
625 | transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, | |
626 | int data_in_dir, struct WD33C93_hostdata *hostdata) | |
627 | { | |
628 | uchar asr; | |
629 | ||
630 | DB(DB_TRANSFER, | |
631 | printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) | |
632 | ||
633 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
634 | write_wd33c93_count(regs, cnt); | |
635 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); | |
636 | if (data_in_dir) { | |
637 | do { | |
638 | asr = read_aux_stat(regs); | |
639 | if (asr & ASR_DBR) | |
640 | *buf++ = read_wd33c93(regs, WD_DATA); | |
641 | } while (!(asr & ASR_INT)); | |
642 | } else { | |
643 | do { | |
644 | asr = read_aux_stat(regs); | |
645 | if (asr & ASR_DBR) | |
646 | write_wd33c93(regs, WD_DATA, *buf++); | |
647 | } while (!(asr & ASR_INT)); | |
648 | } | |
649 | ||
650 | /* Note: we are returning with the interrupt UN-cleared. | |
651 | * Since (presumably) an entire I/O operation has | |
652 | * completed, the bus phase is probably different, and | |
653 | * the interrupt routine will discover this when it | |
654 | * responds to the uncleared int. | |
655 | */ | |
656 | ||
657 | } | |
658 | ||
659 | static void | |
660 | transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, | |
661 | int data_in_dir) | |
662 | { | |
dbb2da55 | 663 | struct scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(cmd); |
1da177e4 LT |
664 | struct WD33C93_hostdata *hostdata; |
665 | unsigned long length; | |
666 | ||
667 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; | |
668 | ||
669 | /* Normally, you'd expect 'this_residual' to be non-zero here. | |
670 | * In a series of scatter-gather transfers, however, this | |
671 | * routine will usually be called with 'this_residual' equal | |
672 | * to 0 and 'buffers_residual' non-zero. This means that a | |
673 | * previous transfer completed, clearing 'this_residual', and | |
674 | * now we need to setup the next scatter-gather buffer as the | |
675 | * source or destination for THIS transfer. | |
676 | */ | |
dbb2da55 BVA |
677 | if (!scsi_pointer->this_residual && scsi_pointer->buffers_residual) { |
678 | scsi_pointer->buffer = sg_next(scsi_pointer->buffer); | |
679 | --scsi_pointer->buffers_residual; | |
680 | scsi_pointer->this_residual = scsi_pointer->buffer->length; | |
681 | scsi_pointer->ptr = sg_virt(scsi_pointer->buffer); | |
1da177e4 | 682 | } |
dbb2da55 | 683 | if (!scsi_pointer->this_residual) /* avoid bogus setups */ |
a5d8421b | 684 | return; |
1da177e4 LT |
685 | |
686 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, | |
687 | hostdata->sync_xfer[cmd->device->id]); | |
688 | ||
689 | /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. | |
690 | * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. | |
691 | */ | |
692 | ||
693 | if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { | |
694 | #ifdef PROC_STATISTICS | |
695 | hostdata->pio_cnt++; | |
696 | #endif | |
dbb2da55 BVA |
697 | transfer_pio(regs, (uchar *) scsi_pointer->ptr, |
698 | scsi_pointer->this_residual, data_in_dir, | |
699 | hostdata); | |
700 | length = scsi_pointer->this_residual; | |
701 | scsi_pointer->this_residual = read_wd33c93_count(regs); | |
702 | scsi_pointer->ptr += length - scsi_pointer->this_residual; | |
1da177e4 LT |
703 | } |
704 | ||
705 | /* We are able to do DMA (in fact, the Amiga hardware is | |
706 | * already going!), so start up the wd33c93 in DMA mode. | |
707 | * We set 'hostdata->dma' = D_DMA_RUNNING so that when the | |
708 | * transfer completes and causes an interrupt, we're | |
709 | * reminded to tell the Amiga to shut down its end. We'll | |
710 | * postpone the updating of 'this_residual' and 'ptr' | |
711 | * until then. | |
712 | */ | |
713 | ||
714 | else { | |
715 | #ifdef PROC_STATISTICS | |
716 | hostdata->dma_cnt++; | |
717 | #endif | |
a5d8421b | 718 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
dbb2da55 | 719 | write_wd33c93_count(regs, scsi_pointer->this_residual); |
1da177e4 LT |
720 | |
721 | if ((hostdata->level2 >= L2_DATA) || | |
dbb2da55 | 722 | (hostdata->level2 == L2_BASIC && scsi_pointer->phase == 0)) { |
1da177e4 LT |
723 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
724 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
725 | hostdata->state = S_RUNNING_LEVEL2; | |
726 | } else | |
727 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); | |
728 | ||
729 | hostdata->dma = D_DMA_RUNNING; | |
730 | } | |
731 | } | |
732 | ||
733 | void | |
734 | wd33c93_intr(struct Scsi_Host *instance) | |
735 | { | |
dbb2da55 | 736 | struct scsi_pointer *scsi_pointer; |
1da177e4 LT |
737 | struct WD33C93_hostdata *hostdata = |
738 | (struct WD33C93_hostdata *) instance->hostdata; | |
739 | const wd33c93_regs regs = hostdata->regs; | |
740 | struct scsi_cmnd *patch, *cmd; | |
741 | uchar asr, sr, phs, id, lun, *ucp, msg; | |
742 | unsigned long length, flags; | |
743 | ||
744 | asr = read_aux_stat(regs); | |
745 | if (!(asr & ASR_INT) || (asr & ASR_BSY)) | |
746 | return; | |
747 | ||
748 | spin_lock_irqsave(&hostdata->lock, flags); | |
749 | ||
750 | #ifdef PROC_STATISTICS | |
751 | hostdata->int_cnt++; | |
752 | #endif | |
753 | ||
754 | cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ | |
dbb2da55 | 755 | scsi_pointer = WD33C93_scsi_pointer(cmd); |
1da177e4 LT |
756 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ |
757 | phs = read_wd33c93(regs, WD_COMMAND_PHASE); | |
758 | ||
759 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) | |
760 | ||
761 | /* After starting a DMA transfer, the next interrupt | |
762 | * is guaranteed to be in response to completion of | |
763 | * the transfer. Since the Amiga DMA hardware runs in | |
764 | * in an open-ended fashion, it needs to be told when | |
765 | * to stop; do that here if D_DMA_RUNNING is true. | |
766 | * Also, we have to update 'this_residual' and 'ptr' | |
767 | * based on the contents of the TRANSFER_COUNT register, | |
768 | * in case the device decided to do an intermediate | |
769 | * disconnect (a device may do this if it has to do a | |
770 | * seek, or just to be nice and let other devices have | |
771 | * some bus time during long transfers). After doing | |
772 | * whatever is needed, we go on and service the WD3393 | |
773 | * interrupt normally. | |
774 | */ | |
775 | if (hostdata->dma == D_DMA_RUNNING) { | |
776 | DB(DB_TRANSFER, | |
dbb2da55 | 777 | printk("[%p/%d:", scsi_pointer->ptr, scsi_pointer->this_residual)) |
1da177e4 LT |
778 | hostdata->dma_stop(cmd->device->host, cmd, 1); |
779 | hostdata->dma = D_DMA_OFF; | |
dbb2da55 BVA |
780 | length = scsi_pointer->this_residual; |
781 | scsi_pointer->this_residual = read_wd33c93_count(regs); | |
782 | scsi_pointer->ptr += length - scsi_pointer->this_residual; | |
1da177e4 | 783 | DB(DB_TRANSFER, |
dbb2da55 | 784 | printk("%p/%d]", scsi_pointer->ptr, scsi_pointer->this_residual)) |
1da177e4 LT |
785 | } |
786 | ||
787 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ | |
788 | switch (sr) { | |
789 | case CSR_TIMEOUT: | |
790 | DB(DB_INTR, printk("TIMEOUT")) | |
791 | ||
792 | if (hostdata->state == S_RUNNING_LEVEL2) | |
793 | hostdata->connected = NULL; | |
794 | else { | |
795 | cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ | |
796 | hostdata->selecting = NULL; | |
797 | } | |
798 | ||
799 | cmd->result = DID_NO_CONNECT << 16; | |
9cb78c16 | 800 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 801 | hostdata->state = S_UNCONNECTED; |
9c4f6be7 | 802 | scsi_done(cmd); |
1da177e4 LT |
803 | |
804 | /* From esp.c: | |
805 | * There is a window of time within the scsi_done() path | |
806 | * of execution where interrupts are turned back on full | |
807 | * blast and left that way. During that time we could | |
808 | * reconnect to a disconnected command, then we'd bomb | |
809 | * out below. We could also end up executing two commands | |
810 | * at _once_. ...just so you know why the restore_flags() | |
811 | * is here... | |
812 | */ | |
813 | ||
814 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
815 | ||
816 | /* We are not connected to a target - check to see if there | |
817 | * are commands waiting to be executed. | |
818 | */ | |
819 | ||
820 | wd33c93_execute(instance); | |
821 | break; | |
822 | ||
823 | /* Note: this interrupt should not occur in a LEVEL2 command */ | |
824 | ||
825 | case CSR_SELECT: | |
826 | DB(DB_INTR, printk("SELECT")) | |
827 | hostdata->connected = cmd = | |
828 | (struct scsi_cmnd *) hostdata->selecting; | |
829 | hostdata->selecting = NULL; | |
830 | ||
831 | /* construct an IDENTIFY message with correct disconnect bit */ | |
832 | ||
9cb78c16 | 833 | hostdata->outgoing_msg[0] = IDENTIFY(0, cmd->device->lun); |
dbb2da55 | 834 | if (scsi_pointer->phase) |
1da177e4 LT |
835 | hostdata->outgoing_msg[0] |= 0x40; |
836 | ||
837 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { | |
1da177e4 LT |
838 | |
839 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; | |
840 | ||
841 | /* Tack on a 2nd message to ask about synchronous transfers. If we've | |
842 | * been asked to do only asynchronous transfers on this device, we | |
843 | * request a fifo depth of 0, which is equivalent to async - should | |
844 | * solve the problems some people have had with GVP's Guru ROM. | |
845 | */ | |
846 | ||
847 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; | |
848 | hostdata->outgoing_msg[2] = 3; | |
849 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; | |
850 | if (hostdata->no_sync & (1 << cmd->device->id)) { | |
a5d8421b | 851 | calc_sync_msg(hostdata->default_sx_per, 0, |
852 | 0, hostdata->outgoing_msg + 4); | |
1da177e4 | 853 | } else { |
a5d8421b | 854 | calc_sync_msg(optimum_sx_per(hostdata), |
855 | OPTIMUM_SX_OFF, | |
856 | hostdata->fast, | |
857 | hostdata->outgoing_msg + 4); | |
1da177e4 LT |
858 | } |
859 | hostdata->outgoing_len = 6; | |
a5d8421b | 860 | #ifdef SYNC_DEBUG |
861 | ucp = hostdata->outgoing_msg + 1; | |
862 | printk(" sending SDTR %02x03%02x%02x%02x ", | |
863 | ucp[0], ucp[2], ucp[3], ucp[4]); | |
864 | #endif | |
1da177e4 LT |
865 | } else |
866 | hostdata->outgoing_len = 1; | |
867 | ||
868 | hostdata->state = S_CONNECTED; | |
869 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
870 | break; | |
871 | ||
872 | case CSR_XFER_DONE | PHS_DATA_IN: | |
873 | case CSR_UNEXP | PHS_DATA_IN: | |
874 | case CSR_SRV_REQ | PHS_DATA_IN: | |
875 | DB(DB_INTR, | |
dbb2da55 BVA |
876 | printk("IN-%d.%d", scsi_pointer->this_residual, |
877 | scsi_pointer->buffers_residual)) | |
1da177e4 LT |
878 | transfer_bytes(regs, cmd, DATA_IN_DIR); |
879 | if (hostdata->state != S_RUNNING_LEVEL2) | |
880 | hostdata->state = S_CONNECTED; | |
881 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
882 | break; | |
883 | ||
884 | case CSR_XFER_DONE | PHS_DATA_OUT: | |
885 | case CSR_UNEXP | PHS_DATA_OUT: | |
886 | case CSR_SRV_REQ | PHS_DATA_OUT: | |
887 | DB(DB_INTR, | |
dbb2da55 BVA |
888 | printk("OUT-%d.%d", scsi_pointer->this_residual, |
889 | scsi_pointer->buffers_residual)) | |
1da177e4 LT |
890 | transfer_bytes(regs, cmd, DATA_OUT_DIR); |
891 | if (hostdata->state != S_RUNNING_LEVEL2) | |
892 | hostdata->state = S_CONNECTED; | |
893 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
894 | break; | |
895 | ||
896 | /* Note: this interrupt should not occur in a LEVEL2 command */ | |
897 | ||
898 | case CSR_XFER_DONE | PHS_COMMAND: | |
899 | case CSR_UNEXP | PHS_COMMAND: | |
900 | case CSR_SRV_REQ | PHS_COMMAND: | |
5cd049a5 | 901 | DB(DB_INTR, printk("CMND-%02x", cmd->cmnd[0])) |
1da177e4 LT |
902 | transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, |
903 | hostdata); | |
904 | hostdata->state = S_CONNECTED; | |
905 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
906 | break; | |
907 | ||
908 | case CSR_XFER_DONE | PHS_STATUS: | |
909 | case CSR_UNEXP | PHS_STATUS: | |
910 | case CSR_SRV_REQ | PHS_STATUS: | |
911 | DB(DB_INTR, printk("STATUS=")) | |
dbb2da55 BVA |
912 | scsi_pointer->Status = read_1_byte(regs); |
913 | DB(DB_INTR, printk("%02x", scsi_pointer->Status)) | |
1da177e4 LT |
914 | if (hostdata->level2 >= L2_BASIC) { |
915 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ | |
882905c7 | 916 | udelay(7); |
1da177e4 LT |
917 | hostdata->state = S_RUNNING_LEVEL2; |
918 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); | |
919 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
920 | } else { | |
921 | hostdata->state = S_CONNECTED; | |
922 | } | |
923 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
924 | break; | |
925 | ||
926 | case CSR_XFER_DONE | PHS_MESS_IN: | |
927 | case CSR_UNEXP | PHS_MESS_IN: | |
928 | case CSR_SRV_REQ | PHS_MESS_IN: | |
929 | DB(DB_INTR, printk("MSG_IN=")) | |
930 | ||
931 | msg = read_1_byte(regs); | |
932 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ | |
882905c7 | 933 | udelay(7); |
1da177e4 LT |
934 | |
935 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; | |
936 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) | |
937 | msg = EXTENDED_MESSAGE; | |
938 | else | |
939 | hostdata->incoming_ptr = 0; | |
940 | ||
dbb2da55 | 941 | scsi_pointer->Message = msg; |
1da177e4 LT |
942 | switch (msg) { |
943 | ||
944 | case COMMAND_COMPLETE: | |
5cd049a5 | 945 | DB(DB_INTR, printk("CCMP")) |
1da177e4 LT |
946 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
947 | hostdata->state = S_PRE_CMP_DISC; | |
948 | break; | |
949 | ||
950 | case SAVE_POINTERS: | |
951 | DB(DB_INTR, printk("SDP")) | |
952 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
953 | hostdata->state = S_CONNECTED; | |
954 | break; | |
955 | ||
956 | case RESTORE_POINTERS: | |
957 | DB(DB_INTR, printk("RDP")) | |
958 | if (hostdata->level2 >= L2_BASIC) { | |
959 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); | |
960 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
961 | hostdata->state = S_RUNNING_LEVEL2; | |
962 | } else { | |
963 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
964 | hostdata->state = S_CONNECTED; | |
965 | } | |
966 | break; | |
967 | ||
968 | case DISCONNECT: | |
969 | DB(DB_INTR, printk("DIS")) | |
970 | cmd->device->disconnect = 1; | |
971 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
972 | hostdata->state = S_PRE_TMP_DISC; | |
973 | break; | |
974 | ||
975 | case MESSAGE_REJECT: | |
976 | DB(DB_INTR, printk("REJ")) | |
977 | #ifdef SYNC_DEBUG | |
978 | printk("-REJ-"); | |
979 | #endif | |
a5d8421b | 980 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) { |
1da177e4 | 981 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
a5d8421b | 982 | /* we want default_sx_per, not DEFAULT_SX_PER */ |
983 | hostdata->sync_xfer[cmd->device->id] = | |
984 | calc_sync_xfer(hostdata->default_sx_per | |
985 | / 4, 0, 0, hostdata->sx_table); | |
986 | } | |
1da177e4 LT |
987 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
988 | hostdata->state = S_CONNECTED; | |
989 | break; | |
990 | ||
991 | case EXTENDED_MESSAGE: | |
992 | DB(DB_INTR, printk("EXT")) | |
993 | ||
994 | ucp = hostdata->incoming_msg; | |
995 | ||
996 | #ifdef SYNC_DEBUG | |
997 | printk("%02x", ucp[hostdata->incoming_ptr]); | |
998 | #endif | |
999 | /* Is this the last byte of the extended message? */ | |
1000 | ||
1001 | if ((hostdata->incoming_ptr >= 2) && | |
1002 | (hostdata->incoming_ptr == (ucp[1] + 1))) { | |
1003 | ||
1004 | switch (ucp[2]) { /* what's the EXTENDED code? */ | |
1005 | case EXTENDED_SDTR: | |
a5d8421b | 1006 | /* default to default async period */ |
1007 | id = calc_sync_xfer(hostdata-> | |
1008 | default_sx_per / 4, 0, | |
1009 | 0, hostdata->sx_table); | |
1da177e4 LT |
1010 | if (hostdata->sync_stat[cmd->device->id] != |
1011 | SS_WAITING) { | |
1012 | ||
1013 | /* A device has sent an unsolicited SDTR message; rather than go | |
1014 | * through the effort of decoding it and then figuring out what | |
1015 | * our reply should be, we're just gonna say that we have a | |
1016 | * synchronous fifo depth of 0. This will result in asynchronous | |
1017 | * transfers - not ideal but so much easier. | |
1018 | * Actually, this is OK because it assures us that if we don't | |
1019 | * specifically ask for sync transfers, we won't do any. | |
1020 | */ | |
1021 | ||
1022 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1023 | hostdata->outgoing_msg[0] = | |
1024 | EXTENDED_MESSAGE; | |
1025 | hostdata->outgoing_msg[1] = 3; | |
1026 | hostdata->outgoing_msg[2] = | |
1027 | EXTENDED_SDTR; | |
a5d8421b | 1028 | calc_sync_msg(hostdata-> |
1029 | default_sx_per, 0, | |
1030 | 0, hostdata->outgoing_msg + 3); | |
1da177e4 | 1031 | hostdata->outgoing_len = 5; |
1da177e4 | 1032 | } else { |
a5d8421b | 1033 | if (ucp[4]) /* well, sync transfer */ |
1034 | id = calc_sync_xfer(ucp[3], ucp[4], | |
1035 | hostdata->fast, | |
1036 | hostdata->sx_table); | |
1037 | else if (ucp[3]) /* very unlikely... */ | |
1038 | id = calc_sync_xfer(ucp[3], ucp[4], | |
1039 | 0, hostdata->sx_table); | |
1da177e4 | 1040 | } |
a5d8421b | 1041 | hostdata->sync_xfer[cmd->device->id] = id; |
1da177e4 | 1042 | #ifdef SYNC_DEBUG |
a5d8421b | 1043 | printk(" sync_xfer=%02x\n", |
1da177e4 LT |
1044 | hostdata->sync_xfer[cmd->device->id]); |
1045 | #endif | |
1046 | hostdata->sync_stat[cmd->device->id] = | |
1047 | SS_SET; | |
1048 | write_wd33c93_cmd(regs, | |
1049 | WD_CMD_NEGATE_ACK); | |
1050 | hostdata->state = S_CONNECTED; | |
1051 | break; | |
1052 | case EXTENDED_WDTR: | |
1053 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1054 | printk("sending WDTR "); | |
1055 | hostdata->outgoing_msg[0] = | |
1056 | EXTENDED_MESSAGE; | |
1057 | hostdata->outgoing_msg[1] = 2; | |
1058 | hostdata->outgoing_msg[2] = | |
1059 | EXTENDED_WDTR; | |
1060 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ | |
1061 | hostdata->outgoing_len = 4; | |
1062 | write_wd33c93_cmd(regs, | |
1063 | WD_CMD_NEGATE_ACK); | |
1064 | hostdata->state = S_CONNECTED; | |
1065 | break; | |
1066 | default: | |
1067 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1068 | printk | |
1069 | ("Rejecting Unknown Extended Message(%02x). ", | |
1070 | ucp[2]); | |
1071 | hostdata->outgoing_msg[0] = | |
1072 | MESSAGE_REJECT; | |
1073 | hostdata->outgoing_len = 1; | |
1074 | write_wd33c93_cmd(regs, | |
1075 | WD_CMD_NEGATE_ACK); | |
1076 | hostdata->state = S_CONNECTED; | |
1077 | break; | |
1078 | } | |
1079 | hostdata->incoming_ptr = 0; | |
1080 | } | |
1081 | ||
1082 | /* We need to read more MESS_IN bytes for the extended message */ | |
1083 | ||
1084 | else { | |
1085 | hostdata->incoming_ptr++; | |
1086 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1087 | hostdata->state = S_CONNECTED; | |
1088 | } | |
1089 | break; | |
1090 | ||
1091 | default: | |
1092 | printk("Rejecting Unknown Message(%02x) ", msg); | |
1093 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1094 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; | |
1095 | hostdata->outgoing_len = 1; | |
1096 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1097 | hostdata->state = S_CONNECTED; | |
1098 | } | |
1099 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1100 | break; | |
1101 | ||
1102 | /* Note: this interrupt will occur only after a LEVEL2 command */ | |
1103 | ||
1104 | case CSR_SEL_XFER_DONE: | |
1105 | ||
1106 | /* Make sure that reselection is enabled at this point - it may | |
1107 | * have been turned off for the command that just completed. | |
1108 | */ | |
1109 | ||
1110 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
1111 | if (phs == 0x60) { | |
5cd049a5 | 1112 | DB(DB_INTR, printk("SX-DONE")) |
dbb2da55 | 1113 | scsi_pointer->Message = COMMAND_COMPLETE; |
1da177e4 | 1114 | lun = read_wd33c93(regs, WD_TARGET_LUN); |
dbb2da55 | 1115 | DB(DB_INTR, printk(":%d.%d", scsi_pointer->Status, lun)) |
1da177e4 | 1116 | hostdata->connected = NULL; |
9cb78c16 | 1117 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 1118 | hostdata->state = S_UNCONNECTED; |
dbb2da55 BVA |
1119 | if (scsi_pointer->Status == ILLEGAL_STATUS_BYTE) |
1120 | scsi_pointer->Status = lun; | |
1da177e4 | 1121 | if (cmd->cmnd[0] == REQUEST_SENSE |
dbb2da55 | 1122 | && scsi_pointer->Status != SAM_STAT_GOOD) { |
6e39836e HR |
1123 | set_host_byte(cmd, DID_ERROR); |
1124 | } else { | |
1125 | set_host_byte(cmd, DID_OK); | |
dbb2da55 BVA |
1126 | scsi_msg_to_host_byte(cmd, scsi_pointer->Message); |
1127 | set_status_byte(cmd, scsi_pointer->Status); | |
6e39836e | 1128 | } |
9c4f6be7 | 1129 | scsi_done(cmd); |
1da177e4 LT |
1130 | |
1131 | /* We are no longer connected to a target - check to see if | |
1132 | * there are commands waiting to be executed. | |
1133 | */ | |
1134 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1135 | wd33c93_execute(instance); | |
1136 | } else { | |
1137 | printk | |
5cd049a5 CH |
1138 | ("%02x:%02x:%02x: Unknown SEL_XFER_DONE phase!!---", |
1139 | asr, sr, phs); | |
1da177e4 LT |
1140 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1141 | } | |
1142 | break; | |
1143 | ||
1144 | /* Note: this interrupt will occur only after a LEVEL2 command */ | |
1145 | ||
1146 | case CSR_SDP: | |
1147 | DB(DB_INTR, printk("SDP")) | |
1148 | hostdata->state = S_RUNNING_LEVEL2; | |
1149 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); | |
1150 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
1151 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1152 | break; | |
1153 | ||
1154 | case CSR_XFER_DONE | PHS_MESS_OUT: | |
1155 | case CSR_UNEXP | PHS_MESS_OUT: | |
1156 | case CSR_SRV_REQ | PHS_MESS_OUT: | |
1157 | DB(DB_INTR, printk("MSG_OUT=")) | |
1158 | ||
1159 | /* To get here, we've probably requested MESSAGE_OUT and have | |
1160 | * already put the correct bytes in outgoing_msg[] and filled | |
1161 | * in outgoing_len. We simply send them out to the SCSI bus. | |
1162 | * Sometimes we get MESSAGE_OUT phase when we're not expecting | |
1163 | * it - like when our SDTR message is rejected by a target. Some | |
1164 | * targets send the REJECT before receiving all of the extended | |
1165 | * message, and then seem to go back to MESSAGE_OUT for a byte | |
1166 | * or two. Not sure why, or if I'm doing something wrong to | |
1167 | * cause this to happen. Regardless, it seems that sending | |
1168 | * NOP messages in these situations results in no harm and | |
1169 | * makes everyone happy. | |
1170 | */ | |
1171 | if (hostdata->outgoing_len == 0) { | |
1172 | hostdata->outgoing_len = 1; | |
1173 | hostdata->outgoing_msg[0] = NOP; | |
1174 | } | |
1175 | transfer_pio(regs, hostdata->outgoing_msg, | |
1176 | hostdata->outgoing_len, DATA_OUT_DIR, hostdata); | |
1177 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) | |
1178 | hostdata->outgoing_len = 0; | |
1179 | hostdata->state = S_CONNECTED; | |
1180 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1181 | break; | |
1182 | ||
1183 | case CSR_UNEXP_DISC: | |
1184 | ||
1185 | /* I think I've seen this after a request-sense that was in response | |
1186 | * to an error condition, but not sure. We certainly need to do | |
1187 | * something when we get this interrupt - the question is 'what?'. | |
1188 | * Let's think positively, and assume some command has finished | |
1189 | * in a legal manner (like a command that provokes a request-sense), | |
1190 | * so we treat it as a normal command-complete-disconnect. | |
1191 | */ | |
1192 | ||
1193 | /* Make sure that reselection is enabled at this point - it may | |
1194 | * have been turned off for the command that just completed. | |
1195 | */ | |
1196 | ||
1197 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
1198 | if (cmd == NULL) { | |
1199 | printk(" - Already disconnected! "); | |
1200 | hostdata->state = S_UNCONNECTED; | |
1201 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1202 | return; | |
1203 | } | |
5cd049a5 | 1204 | DB(DB_INTR, printk("UNEXP_DISC")) |
1da177e4 | 1205 | hostdata->connected = NULL; |
9cb78c16 | 1206 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 1207 | hostdata->state = S_UNCONNECTED; |
6e39836e | 1208 | if (cmd->cmnd[0] == REQUEST_SENSE && |
dbb2da55 | 1209 | scsi_pointer->Status != SAM_STAT_GOOD) { |
6e39836e HR |
1210 | set_host_byte(cmd, DID_ERROR); |
1211 | } else { | |
1212 | set_host_byte(cmd, DID_OK); | |
dbb2da55 BVA |
1213 | scsi_msg_to_host_byte(cmd, scsi_pointer->Message); |
1214 | set_status_byte(cmd, scsi_pointer->Status); | |
6e39836e | 1215 | } |
9c4f6be7 | 1216 | scsi_done(cmd); |
1da177e4 LT |
1217 | |
1218 | /* We are no longer connected to a target - check to see if | |
1219 | * there are commands waiting to be executed. | |
1220 | */ | |
1221 | /* look above for comments on scsi_done() */ | |
1222 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1223 | wd33c93_execute(instance); | |
1224 | break; | |
1225 | ||
1226 | case CSR_DISC: | |
1227 | ||
1228 | /* Make sure that reselection is enabled at this point - it may | |
1229 | * have been turned off for the command that just completed. | |
1230 | */ | |
1231 | ||
1232 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
5cd049a5 | 1233 | DB(DB_INTR, printk("DISC")) |
1da177e4 LT |
1234 | if (cmd == NULL) { |
1235 | printk(" - Already disconnected! "); | |
1236 | hostdata->state = S_UNCONNECTED; | |
1237 | } | |
1238 | switch (hostdata->state) { | |
1239 | case S_PRE_CMP_DISC: | |
1240 | hostdata->connected = NULL; | |
9cb78c16 | 1241 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 1242 | hostdata->state = S_UNCONNECTED; |
dbb2da55 | 1243 | DB(DB_INTR, printk(":%d", scsi_pointer->Status)) |
6e39836e | 1244 | if (cmd->cmnd[0] == REQUEST_SENSE |
dbb2da55 | 1245 | && scsi_pointer->Status != SAM_STAT_GOOD) { |
6e39836e HR |
1246 | set_host_byte(cmd, DID_ERROR); |
1247 | } else { | |
1248 | set_host_byte(cmd, DID_OK); | |
dbb2da55 BVA |
1249 | scsi_msg_to_host_byte(cmd, scsi_pointer->Message); |
1250 | set_status_byte(cmd, scsi_pointer->Status); | |
6e39836e | 1251 | } |
9c4f6be7 | 1252 | scsi_done(cmd); |
1da177e4 LT |
1253 | break; |
1254 | case S_PRE_TMP_DISC: | |
1255 | case S_RUNNING_LEVEL2: | |
1256 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; | |
1257 | hostdata->disconnected_Q = cmd; | |
1258 | hostdata->connected = NULL; | |
1259 | hostdata->state = S_UNCONNECTED; | |
1260 | ||
1261 | #ifdef PROC_STATISTICS | |
1262 | hostdata->disc_done_cnt[cmd->device->id]++; | |
1263 | #endif | |
1264 | ||
1265 | break; | |
1266 | default: | |
1267 | printk("*** Unexpected DISCONNECT interrupt! ***"); | |
1268 | hostdata->state = S_UNCONNECTED; | |
1269 | } | |
1270 | ||
1271 | /* We are no longer connected to a target - check to see if | |
1272 | * there are commands waiting to be executed. | |
1273 | */ | |
1274 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1275 | wd33c93_execute(instance); | |
1276 | break; | |
1277 | ||
1278 | case CSR_RESEL_AM: | |
1279 | case CSR_RESEL: | |
1280 | DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) | |
1281 | ||
1282 | /* Old chips (pre -A ???) don't have advanced features and will | |
1283 | * generate CSR_RESEL. In that case we have to extract the LUN the | |
1284 | * hard way (see below). | |
1285 | * First we have to make sure this reselection didn't | |
1286 | * happen during Arbitration/Selection of some other device. | |
1287 | * If yes, put losing command back on top of input_Q. | |
1288 | */ | |
1289 | if (hostdata->level2 <= L2_NONE) { | |
1290 | ||
1291 | if (hostdata->selecting) { | |
1292 | cmd = (struct scsi_cmnd *) hostdata->selecting; | |
1293 | hostdata->selecting = NULL; | |
9cb78c16 | 1294 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1295 | cmd->host_scribble = |
1296 | (uchar *) hostdata->input_Q; | |
1297 | hostdata->input_Q = cmd; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | else { | |
1302 | ||
1303 | if (cmd) { | |
1304 | if (phs == 0x00) { | |
1305 | hostdata->busy[cmd->device->id] &= | |
9cb78c16 | 1306 | ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1307 | cmd->host_scribble = |
1308 | (uchar *) hostdata->input_Q; | |
1309 | hostdata->input_Q = cmd; | |
1310 | } else { | |
1311 | printk | |
1312 | ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", | |
1313 | asr, sr, phs); | |
1314 | while (1) | |
1315 | printk("\r"); | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | } | |
1320 | ||
1321 | /* OK - find out which device reselected us. */ | |
1322 | ||
1323 | id = read_wd33c93(regs, WD_SOURCE_ID); | |
1324 | id &= SRCID_MASK; | |
1325 | ||
1326 | /* and extract the lun from the ID message. (Note that we don't | |
1327 | * bother to check for a valid message here - I guess this is | |
1328 | * not the right way to go, but...) | |
1329 | */ | |
1330 | ||
1331 | if (sr == CSR_RESEL_AM) { | |
1332 | lun = read_wd33c93(regs, WD_DATA); | |
1333 | if (hostdata->level2 < L2_RESELECT) | |
1334 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1335 | lun &= 7; | |
1336 | } else { | |
1337 | /* Old chip; wait for msgin phase to pick up the LUN. */ | |
1338 | for (lun = 255; lun; lun--) { | |
1339 | if ((asr = read_aux_stat(regs)) & ASR_INT) | |
1340 | break; | |
1341 | udelay(10); | |
1342 | } | |
1343 | if (!(asr & ASR_INT)) { | |
1344 | printk | |
1345 | ("wd33c93: Reselected without IDENTIFY\n"); | |
1346 | lun = 0; | |
1347 | } else { | |
1348 | /* Verify this is a change to MSG_IN and read the message */ | |
1349 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
882905c7 | 1350 | udelay(7); |
1da177e4 LT |
1351 | if (sr == (CSR_ABORT | PHS_MESS_IN) || |
1352 | sr == (CSR_UNEXP | PHS_MESS_IN) || | |
1353 | sr == (CSR_SRV_REQ | PHS_MESS_IN)) { | |
1354 | /* Got MSG_IN, grab target LUN */ | |
1355 | lun = read_1_byte(regs); | |
1356 | /* Now we expect a 'paused with ACK asserted' int.. */ | |
1357 | asr = read_aux_stat(regs); | |
1358 | if (!(asr & ASR_INT)) { | |
1359 | udelay(10); | |
1360 | asr = read_aux_stat(regs); | |
1361 | if (!(asr & ASR_INT)) | |
1362 | printk | |
1363 | ("wd33c93: No int after LUN on RESEL (%02x)\n", | |
1364 | asr); | |
1365 | } | |
1366 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
882905c7 | 1367 | udelay(7); |
1da177e4 LT |
1368 | if (sr != CSR_MSGIN) |
1369 | printk | |
1370 | ("wd33c93: Not paused with ACK on RESEL (%02x)\n", | |
1371 | sr); | |
1372 | lun &= 7; | |
1373 | write_wd33c93_cmd(regs, | |
1374 | WD_CMD_NEGATE_ACK); | |
1375 | } else { | |
1376 | printk | |
1377 | ("wd33c93: Not MSG_IN on reselect (%02x)\n", | |
1378 | sr); | |
1379 | lun = 0; | |
1380 | } | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* Now we look for the command that's reconnecting. */ | |
1385 | ||
1386 | cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; | |
1387 | patch = NULL; | |
1388 | while (cmd) { | |
9cb78c16 | 1389 | if (id == cmd->device->id && lun == (u8)cmd->device->lun) |
1da177e4 LT |
1390 | break; |
1391 | patch = cmd; | |
1392 | cmd = (struct scsi_cmnd *) cmd->host_scribble; | |
1393 | } | |
1394 | ||
1395 | /* Hmm. Couldn't find a valid command.... What to do? */ | |
1396 | ||
1397 | if (!cmd) { | |
1398 | printk | |
1399 | ("---TROUBLE: target %d.%d not in disconnect queue---", | |
9cb78c16 | 1400 | id, (u8)lun); |
1da177e4 LT |
1401 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1402 | return; | |
1403 | } | |
1404 | ||
1405 | /* Ok, found the command - now start it up again. */ | |
1406 | ||
1407 | if (patch) | |
1408 | patch->host_scribble = cmd->host_scribble; | |
1409 | else | |
1410 | hostdata->disconnected_Q = | |
1411 | (struct scsi_cmnd *) cmd->host_scribble; | |
1412 | hostdata->connected = cmd; | |
1413 | ||
1414 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' | |
1415 | * because these things are preserved over a disconnect. | |
1416 | * But we DO need to fix the DPD bit so it's correct for this command. | |
1417 | */ | |
1418 | ||
1419 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
1420 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); | |
1421 | else | |
1422 | write_wd33c93(regs, WD_DESTINATION_ID, | |
1423 | cmd->device->id | DSTID_DPD); | |
1424 | if (hostdata->level2 >= L2_RESELECT) { | |
1425 | write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ | |
1426 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); | |
1427 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
1428 | hostdata->state = S_RUNNING_LEVEL2; | |
1429 | } else | |
1430 | hostdata->state = S_CONNECTED; | |
1431 | ||
1da177e4 LT |
1432 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1433 | break; | |
1434 | ||
1435 | default: | |
1436 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); | |
1437 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1438 | } | |
1439 | ||
1440 | DB(DB_INTR, printk("} ")) | |
1441 | ||
1442 | } | |
1443 | ||
1444 | static void | |
1445 | reset_wd33c93(struct Scsi_Host *instance) | |
1446 | { | |
1447 | struct WD33C93_hostdata *hostdata = | |
1448 | (struct WD33C93_hostdata *) instance->hostdata; | |
1449 | const wd33c93_regs regs = hostdata->regs; | |
1450 | uchar sr; | |
1451 | ||
1452 | #ifdef CONFIG_SGI_IP22 | |
1453 | { | |
1454 | int busycount = 0; | |
1455 | extern void sgiwd93_reset(unsigned long); | |
1456 | /* wait 'til the chip gets some time for us */ | |
1457 | while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) | |
1458 | udelay (10); | |
1459 | /* | |
1460 | * there are scsi devices out there, which manage to lock up | |
1461 | * the wd33c93 in a busy condition. In this state it won't | |
1462 | * accept the reset command. The only way to solve this is to | |
1463 | * give the chip a hardware reset (if possible). The code below | |
1464 | * does this for the SGI Indy, where this is possible | |
1465 | */ | |
1466 | /* still busy ? */ | |
1467 | if (read_aux_stat(regs) & ASR_BSY) | |
1468 | sgiwd93_reset(instance->base); /* yeah, give it the hard one */ | |
1469 | } | |
1470 | #endif | |
1471 | ||
1472 | write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | | |
1473 | instance->this_id | hostdata->clock_freq); | |
1474 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1475 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, | |
1476 | calc_sync_xfer(hostdata->default_sx_per / 4, | |
a5d8421b | 1477 | DEFAULT_SX_OFF, 0, hostdata->sx_table)); |
1da177e4 LT |
1478 | write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); |
1479 | ||
1480 | ||
1481 | #ifdef CONFIG_MVME147_SCSI | |
1482 | udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ | |
1483 | #endif | |
1484 | ||
1485 | while (!(read_aux_stat(regs) & ASR_INT)) | |
1486 | ; | |
1487 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1488 | ||
1489 | hostdata->microcode = read_wd33c93(regs, WD_CDB_1); | |
1490 | if (sr == 0x00) | |
1491 | hostdata->chip = C_WD33C93; | |
1492 | else if (sr == 0x01) { | |
1493 | write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ | |
1494 | sr = read_wd33c93(regs, WD_QUEUE_TAG); | |
1495 | if (sr == 0xa5) { | |
1496 | hostdata->chip = C_WD33C93B; | |
1497 | write_wd33c93(regs, WD_QUEUE_TAG, 0); | |
1498 | } else | |
1499 | hostdata->chip = C_WD33C93A; | |
1500 | } else | |
1501 | hostdata->chip = C_UNKNOWN_CHIP; | |
1502 | ||
a5d8421b | 1503 | if (hostdata->chip != C_WD33C93B) /* Fast SCSI unavailable */ |
1504 | hostdata->fast = 0; | |
1505 | ||
1da177e4 LT |
1506 | write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
1507 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1508 | } | |
1509 | ||
1510 | int | |
1511 | wd33c93_host_reset(struct scsi_cmnd * SCpnt) | |
1512 | { | |
1513 | struct Scsi_Host *instance; | |
1514 | struct WD33C93_hostdata *hostdata; | |
1515 | int i; | |
1516 | ||
1517 | instance = SCpnt->device->host; | |
ec05e238 | 1518 | spin_lock_irq(instance->host_lock); |
1da177e4 LT |
1519 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
1520 | ||
1521 | printk("scsi%d: reset. ", instance->host_no); | |
1522 | disable_irq(instance->irq); | |
1523 | ||
1524 | hostdata->dma_stop(instance, NULL, 0); | |
1525 | for (i = 0; i < 8; i++) { | |
1526 | hostdata->busy[i] = 0; | |
1527 | hostdata->sync_xfer[i] = | |
a5d8421b | 1528 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1529 | 0, hostdata->sx_table); | |
1da177e4 LT |
1530 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1531 | } | |
1532 | hostdata->input_Q = NULL; | |
1533 | hostdata->selecting = NULL; | |
1534 | hostdata->connected = NULL; | |
1535 | hostdata->disconnected_Q = NULL; | |
1536 | hostdata->state = S_UNCONNECTED; | |
1537 | hostdata->dma = D_DMA_OFF; | |
1538 | hostdata->incoming_ptr = 0; | |
1539 | hostdata->outgoing_len = 0; | |
1540 | ||
1541 | reset_wd33c93(instance); | |
1542 | SCpnt->result = DID_RESET << 16; | |
1543 | enable_irq(instance->irq); | |
ec05e238 | 1544 | spin_unlock_irq(instance->host_lock); |
1da177e4 LT |
1545 | return SUCCESS; |
1546 | } | |
1547 | ||
1548 | int | |
1549 | wd33c93_abort(struct scsi_cmnd * cmd) | |
1550 | { | |
1551 | struct Scsi_Host *instance; | |
1552 | struct WD33C93_hostdata *hostdata; | |
1553 | wd33c93_regs regs; | |
1554 | struct scsi_cmnd *tmp, *prev; | |
1555 | ||
1556 | disable_irq(cmd->device->host->irq); | |
1557 | ||
1558 | instance = cmd->device->host; | |
1559 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; | |
1560 | regs = hostdata->regs; | |
1561 | ||
1562 | /* | |
1563 | * Case 1 : If the command hasn't been issued yet, we simply remove it | |
1564 | * from the input_Q. | |
1565 | */ | |
1566 | ||
1567 | tmp = (struct scsi_cmnd *) hostdata->input_Q; | |
a5d361fc | 1568 | prev = NULL; |
1da177e4 LT |
1569 | while (tmp) { |
1570 | if (tmp == cmd) { | |
1571 | if (prev) | |
1572 | prev->host_scribble = cmd->host_scribble; | |
1573 | else | |
1574 | hostdata->input_Q = | |
1575 | (struct scsi_cmnd *) cmd->host_scribble; | |
1576 | cmd->host_scribble = NULL; | |
1577 | cmd->result = DID_ABORT << 16; | |
1578 | printk | |
5cd049a5 CH |
1579 | ("scsi%d: Abort - removing command from input_Q. ", |
1580 | instance->host_no); | |
1da177e4 | 1581 | enable_irq(cmd->device->host->irq); |
9c4f6be7 | 1582 | scsi_done(cmd); |
1da177e4 LT |
1583 | return SUCCESS; |
1584 | } | |
1585 | prev = tmp; | |
1586 | tmp = (struct scsi_cmnd *) tmp->host_scribble; | |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * Case 2 : If the command is connected, we're going to fail the abort | |
1591 | * and let the high level SCSI driver retry at a later time or | |
1592 | * issue a reset. | |
1593 | * | |
1594 | * Timeouts, and therefore aborted commands, will be highly unlikely | |
1595 | * and handling them cleanly in this situation would make the common | |
1596 | * case of noresets less efficient, and would pollute our code. So, | |
1597 | * we fail. | |
1598 | */ | |
1599 | ||
1600 | if (hostdata->connected == cmd) { | |
1601 | uchar sr, asr; | |
1602 | unsigned long timeout; | |
1603 | ||
5cd049a5 CH |
1604 | printk("scsi%d: Aborting connected command - ", |
1605 | instance->host_no); | |
1da177e4 LT |
1606 | |
1607 | printk("stopping DMA - "); | |
1608 | if (hostdata->dma == D_DMA_RUNNING) { | |
1609 | hostdata->dma_stop(instance, cmd, 0); | |
1610 | hostdata->dma = D_DMA_OFF; | |
1611 | } | |
1612 | ||
1613 | printk("sending wd33c93 ABORT command - "); | |
1614 | write_wd33c93(regs, WD_CONTROL, | |
1615 | CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1616 | write_wd33c93_cmd(regs, WD_CMD_ABORT); | |
1617 | ||
1618 | /* Now we have to attempt to flush out the FIFO... */ | |
1619 | ||
1620 | printk("flushing fifo - "); | |
1621 | timeout = 1000000; | |
1622 | do { | |
1623 | asr = read_aux_stat(regs); | |
1624 | if (asr & ASR_DBR) | |
1625 | read_wd33c93(regs, WD_DATA); | |
1626 | } while (!(asr & ASR_INT) && timeout-- > 0); | |
1627 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1628 | printk | |
1629 | ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", | |
1630 | asr, sr, read_wd33c93_count(regs), timeout); | |
1631 | ||
1632 | /* | |
1633 | * Abort command processed. | |
1634 | * Still connected. | |
1635 | * We must disconnect. | |
1636 | */ | |
1637 | ||
1638 | printk("sending wd33c93 DISCONNECT command - "); | |
1639 | write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); | |
1640 | ||
1641 | timeout = 1000000; | |
1642 | asr = read_aux_stat(regs); | |
1643 | while ((asr & ASR_CIP) && timeout-- > 0) | |
1644 | asr = read_aux_stat(regs); | |
1645 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1646 | printk("asr=%02x, sr=%02x.", asr, sr); | |
1647 | ||
9cb78c16 | 1648 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1649 | hostdata->connected = NULL; |
1650 | hostdata->state = S_UNCONNECTED; | |
1651 | cmd->result = DID_ABORT << 16; | |
1652 | ||
1653 | /* sti();*/ | |
1654 | wd33c93_execute(instance); | |
1655 | ||
1656 | enable_irq(cmd->device->host->irq); | |
9c4f6be7 | 1657 | scsi_done(cmd); |
1da177e4 LT |
1658 | return SUCCESS; |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * Case 3: If the command is currently disconnected from the bus, | |
1663 | * we're not going to expend much effort here: Let's just return | |
1664 | * an ABORT_SNOOZE and hope for the best... | |
1665 | */ | |
1666 | ||
1667 | tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; | |
1668 | while (tmp) { | |
1669 | if (tmp == cmd) { | |
1670 | printk | |
5cd049a5 CH |
1671 | ("scsi%d: Abort - command found on disconnected_Q - ", |
1672 | instance->host_no); | |
1da177e4 LT |
1673 | printk("Abort SNOOZE. "); |
1674 | enable_irq(cmd->device->host->irq); | |
1675 | return FAILED; | |
1676 | } | |
1677 | tmp = (struct scsi_cmnd *) tmp->host_scribble; | |
1678 | } | |
1679 | ||
1680 | /* | |
1681 | * Case 4 : If we reached this point, the command was not found in any of | |
1682 | * the queues. | |
1683 | * | |
1684 | * We probably reached this point because of an unlikely race condition | |
1685 | * between the command completing successfully and the abortion code, | |
1686 | * so we won't panic, but we will notify the user in case something really | |
1687 | * broke. | |
1688 | */ | |
1689 | ||
1690 | /* sti();*/ | |
1691 | wd33c93_execute(instance); | |
1692 | ||
1693 | enable_irq(cmd->device->host->irq); | |
1694 | printk("scsi%d: warning : SCSI command probably completed successfully" | |
1695 | " before abortion. ", instance->host_no); | |
1696 | return FAILED; | |
1697 | } | |
1698 | ||
1699 | #define MAX_WD33C93_HOSTS 4 | |
6391a113 | 1700 | #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) |
1da177e4 LT |
1701 | #define SETUP_BUFFER_SIZE 200 |
1702 | static char setup_buffer[SETUP_BUFFER_SIZE]; | |
1703 | static char setup_used[MAX_SETUP_ARGS]; | |
1704 | static int done_setup = 0; | |
1705 | ||
078dda95 | 1706 | static int |
1da177e4 LT |
1707 | wd33c93_setup(char *str) |
1708 | { | |
1709 | int i; | |
1710 | char *p1, *p2; | |
1711 | ||
1712 | /* The kernel does some processing of the command-line before calling | |
1713 | * this function: If it begins with any decimal or hex number arguments, | |
1714 | * ints[0] = how many numbers found and ints[1] through [n] are the values | |
1715 | * themselves. str points to where the non-numeric arguments (if any) | |
1716 | * start: We do our own parsing of those. We construct synthetic 'nosync' | |
1717 | * keywords out of numeric args (to maintain compatibility with older | |
1718 | * versions) and then add the rest of the arguments. | |
1719 | */ | |
1720 | ||
1721 | p1 = setup_buffer; | |
1722 | *p1 = '\0'; | |
1723 | if (str) | |
1724 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); | |
1725 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; | |
1726 | p1 = setup_buffer; | |
1727 | i = 0; | |
1728 | while (*p1 && (i < MAX_SETUP_ARGS)) { | |
1729 | p2 = strchr(p1, ','); | |
1730 | if (p2) { | |
1731 | *p2 = '\0'; | |
1732 | if (p1 != p2) | |
1733 | setup_args[i] = p1; | |
1734 | p1 = p2 + 1; | |
1735 | i++; | |
1736 | } else { | |
1737 | setup_args[i] = p1; | |
1738 | break; | |
1739 | } | |
1740 | } | |
1741 | for (i = 0; i < MAX_SETUP_ARGS; i++) | |
1742 | setup_used[i] = 0; | |
1743 | done_setup = 1; | |
1744 | ||
1745 | return 1; | |
1746 | } | |
1747 | __setup("wd33c93=", wd33c93_setup); | |
1748 | ||
1749 | /* check_setup_args() returns index if key found, 0 if not | |
1750 | */ | |
1751 | static int | |
1752 | check_setup_args(char *key, int *flags, int *val, char *buf) | |
1753 | { | |
1754 | int x; | |
1755 | char *cp; | |
1756 | ||
1757 | for (x = 0; x < MAX_SETUP_ARGS; x++) { | |
1758 | if (setup_used[x]) | |
1759 | continue; | |
1760 | if (!strncmp(setup_args[x], key, strlen(key))) | |
1761 | break; | |
1762 | if (!strncmp(setup_args[x], "next", strlen("next"))) | |
1763 | return 0; | |
1764 | } | |
1765 | if (x == MAX_SETUP_ARGS) | |
1766 | return 0; | |
1767 | setup_used[x] = 1; | |
1768 | cp = setup_args[x] + strlen(key); | |
1769 | *val = -1; | |
1770 | if (*cp != ':') | |
1771 | return ++x; | |
1772 | cp++; | |
1773 | if ((*cp >= '0') && (*cp <= '9')) { | |
1774 | *val = simple_strtoul(cp, NULL, 0); | |
1775 | } | |
1776 | return ++x; | |
1777 | } | |
1778 | ||
a5d8421b | 1779 | /* |
1780 | * Calculate internal data-transfer-clock cycle from input-clock | |
1781 | * frequency (/MHz) and fill 'sx_table'. | |
1782 | * | |
1783 | * The original driver used to rely on a fixed sx_table, containing periods | |
1784 | * for (only) the lower limits of the respective input-clock-frequency ranges | |
25985edc | 1785 | * (8-10/12-15/16-20 MHz). Although it seems, that no problems occurred with |
a5d8421b | 1786 | * this setting so far, it might be desirable to adjust the transfer periods |
1787 | * closer to the really attached, possibly 25% higher, input-clock, since | |
1788 | * - the wd33c93 may really use a significant shorter period, than it has | |
1789 | * negotiated (eg. thrashing the target, which expects 4/8MHz, with 5/10MHz | |
1790 | * instead). | |
1791 | * - the wd33c93 may ask the target for a lower transfer rate, than the target | |
1792 | * is capable of (eg. negotiating for an assumed minimum of 252ns instead of | |
1793 | * possible 200ns, which indeed shows up in tests as an approx. 10% lower | |
1794 | * transfer rate). | |
1795 | */ | |
1796 | static inline unsigned int | |
1797 | round_4(unsigned int x) | |
1798 | { | |
1799 | switch (x & 3) { | |
1800 | case 1: --x; | |
1801 | break; | |
1802 | case 2: ++x; | |
df561f66 | 1803 | fallthrough; |
a5d8421b | 1804 | case 3: ++x; |
1805 | } | |
1806 | return x; | |
1807 | } | |
1808 | ||
1809 | static void | |
1810 | calc_sx_table(unsigned int mhz, struct sx_period sx_table[9]) | |
1811 | { | |
1812 | unsigned int d, i; | |
1813 | if (mhz < 11) | |
1814 | d = 2; /* divisor for 8-10 MHz input-clock */ | |
1815 | else if (mhz < 16) | |
1816 | d = 3; /* divisor for 12-15 MHz input-clock */ | |
1817 | else | |
1818 | d = 4; /* divisor for 16-20 MHz input-clock */ | |
1819 | ||
1820 | d = (100000 * d) / 2 / mhz; /* 100 x DTCC / nanosec */ | |
1821 | ||
1822 | sx_table[0].period_ns = 1; | |
1823 | sx_table[0].reg_value = 0x20; | |
1824 | for (i = 1; i < 8; i++) { | |
1825 | sx_table[i].period_ns = round_4((i+1)*d / 100); | |
1826 | sx_table[i].reg_value = (i+1)*0x10; | |
1827 | } | |
1828 | sx_table[7].reg_value = 0; | |
1829 | sx_table[8].period_ns = 0; | |
1830 | sx_table[8].reg_value = 0; | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * check and, maybe, map an init- or "clock:"- argument. | |
1835 | */ | |
1836 | static uchar | |
1837 | set_clk_freq(int freq, int *mhz) | |
1838 | { | |
1839 | int x = freq; | |
1840 | if (WD33C93_FS_8_10 == freq) | |
1841 | freq = 8; | |
1842 | else if (WD33C93_FS_12_15 == freq) | |
1843 | freq = 12; | |
1844 | else if (WD33C93_FS_16_20 == freq) | |
1845 | freq = 16; | |
1846 | else if (freq > 7 && freq < 11) | |
1847 | x = WD33C93_FS_8_10; | |
1848 | else if (freq > 11 && freq < 16) | |
1849 | x = WD33C93_FS_12_15; | |
1850 | else if (freq > 15 && freq < 21) | |
1851 | x = WD33C93_FS_16_20; | |
1852 | else { | |
1853 | /* Hmm, wouldn't it be safer to assume highest freq here? */ | |
1854 | x = WD33C93_FS_8_10; | |
1855 | freq = 8; | |
1856 | } | |
1857 | *mhz = freq; | |
1858 | return x; | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * to be used with the resync: fast: ... options | |
1863 | */ | |
1864 | static inline void set_resync ( struct WD33C93_hostdata *hd, int mask ) | |
1865 | { | |
1866 | int i; | |
1867 | for (i = 0; i < 8; i++) | |
1868 | if (mask & (1 << i)) | |
1869 | hd->sync_stat[i] = SS_UNSET; | |
1870 | } | |
1871 | ||
1da177e4 LT |
1872 | void |
1873 | wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, | |
1874 | dma_setup_t setup, dma_stop_t stop, int clock_freq) | |
1875 | { | |
1876 | struct WD33C93_hostdata *hostdata; | |
1877 | int i; | |
1878 | int flags; | |
1879 | int val; | |
1880 | char buf[32]; | |
1881 | ||
1882 | if (!done_setup && setup_strings) | |
1883 | wd33c93_setup(setup_strings); | |
1884 | ||
1885 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; | |
1886 | ||
1887 | hostdata->regs = regs; | |
a5d8421b | 1888 | hostdata->clock_freq = set_clk_freq(clock_freq, &i); |
1889 | calc_sx_table(i, hostdata->sx_table); | |
1da177e4 LT |
1890 | hostdata->dma_setup = setup; |
1891 | hostdata->dma_stop = stop; | |
1892 | hostdata->dma_bounce_buffer = NULL; | |
1893 | hostdata->dma_bounce_len = 0; | |
1894 | for (i = 0; i < 8; i++) { | |
1895 | hostdata->busy[i] = 0; | |
1896 | hostdata->sync_xfer[i] = | |
a5d8421b | 1897 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1898 | 0, hostdata->sx_table); | |
1da177e4 LT |
1899 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1900 | #ifdef PROC_STATISTICS | |
1901 | hostdata->cmd_cnt[i] = 0; | |
1902 | hostdata->disc_allowed_cnt[i] = 0; | |
1903 | hostdata->disc_done_cnt[i] = 0; | |
1904 | #endif | |
1905 | } | |
1906 | hostdata->input_Q = NULL; | |
1907 | hostdata->selecting = NULL; | |
1908 | hostdata->connected = NULL; | |
1909 | hostdata->disconnected_Q = NULL; | |
1910 | hostdata->state = S_UNCONNECTED; | |
1911 | hostdata->dma = D_DMA_OFF; | |
1912 | hostdata->level2 = L2_BASIC; | |
1913 | hostdata->disconnect = DIS_ADAPTIVE; | |
1914 | hostdata->args = DEBUG_DEFAULTS; | |
1915 | hostdata->incoming_ptr = 0; | |
1916 | hostdata->outgoing_len = 0; | |
1917 | hostdata->default_sx_per = DEFAULT_SX_PER; | |
1da177e4 LT |
1918 | hostdata->no_dma = 0; /* default is DMA enabled */ |
1919 | ||
1920 | #ifdef PROC_INTERFACE | |
1921 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | | |
1922 | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; | |
1923 | #ifdef PROC_STATISTICS | |
1924 | hostdata->dma_cnt = 0; | |
1925 | hostdata->pio_cnt = 0; | |
1926 | hostdata->int_cnt = 0; | |
1927 | #endif | |
1928 | #endif | |
1929 | ||
a5d8421b | 1930 | if (check_setup_args("clock", &flags, &val, buf)) { |
1931 | hostdata->clock_freq = set_clk_freq(val, &val); | |
1932 | calc_sx_table(val, hostdata->sx_table); | |
1933 | } | |
1934 | ||
1da177e4 LT |
1935 | if (check_setup_args("nosync", &flags, &val, buf)) |
1936 | hostdata->no_sync = val; | |
1937 | ||
1938 | if (check_setup_args("nodma", &flags, &val, buf)) | |
1939 | hostdata->no_dma = (val == -1) ? 1 : val; | |
1940 | ||
1941 | if (check_setup_args("period", &flags, &val, buf)) | |
1942 | hostdata->default_sx_per = | |
a5d8421b | 1943 | hostdata->sx_table[round_period((unsigned int) val, |
1944 | hostdata->sx_table)].period_ns; | |
1da177e4 LT |
1945 | |
1946 | if (check_setup_args("disconnect", &flags, &val, buf)) { | |
1947 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) | |
1948 | hostdata->disconnect = val; | |
1949 | else | |
1950 | hostdata->disconnect = DIS_ADAPTIVE; | |
1951 | } | |
1952 | ||
1953 | if (check_setup_args("level2", &flags, &val, buf)) | |
1954 | hostdata->level2 = val; | |
1955 | ||
1956 | if (check_setup_args("debug", &flags, &val, buf)) | |
1957 | hostdata->args = val & DB_MASK; | |
1958 | ||
a5d8421b | 1959 | if (check_setup_args("burst", &flags, &val, buf)) |
1960 | hostdata->dma_mode = val ? CTRL_BURST:CTRL_DMA; | |
1961 | ||
1962 | if (WD33C93_FS_16_20 == hostdata->clock_freq /* divisor 4 */ | |
1963 | && check_setup_args("fast", &flags, &val, buf)) | |
1964 | hostdata->fast = !!val; | |
1da177e4 LT |
1965 | |
1966 | if ((i = check_setup_args("next", &flags, &val, buf))) { | |
1967 | while (i) | |
1968 | setup_used[--i] = 1; | |
1969 | } | |
1970 | #ifdef PROC_INTERFACE | |
1971 | if (check_setup_args("proc", &flags, &val, buf)) | |
1972 | hostdata->proc = val; | |
1973 | #endif | |
1974 | ||
1975 | spin_lock_irq(&hostdata->lock); | |
1976 | reset_wd33c93(instance); | |
1977 | spin_unlock_irq(&hostdata->lock); | |
1978 | ||
1979 | printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", | |
1980 | instance->host_no, | |
1981 | (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == | |
1982 | C_WD33C93A) ? | |
1983 | "WD33c93A" : (hostdata->chip == | |
1984 | C_WD33C93B) ? "WD33c93B" : "unknown", | |
1985 | hostdata->microcode, hostdata->no_sync, hostdata->no_dma); | |
1986 | #ifdef DEBUGGING_ON | |
1987 | printk(" debug_flags=0x%02x\n", hostdata->args); | |
1988 | #else | |
1989 | printk(" debugging=OFF\n"); | |
1990 | #endif | |
1991 | printk(" setup_args="); | |
1992 | for (i = 0; i < MAX_SETUP_ARGS; i++) | |
1993 | printk("%s,", setup_args[i]); | |
1994 | printk("\n"); | |
565502f8 | 1995 | printk(" Version %s - %s\n", WD33C93_VERSION, WD33C93_DATE); |
1da177e4 LT |
1996 | } |
1997 | ||
408bb25b | 1998 | int wd33c93_write_info(struct Scsi_Host *instance, char *buf, int len) |
1da177e4 | 1999 | { |
1da177e4 | 2000 | #ifdef PROC_INTERFACE |
1da177e4 | 2001 | char *bp; |
1da177e4 | 2002 | struct WD33C93_hostdata *hd; |
a5d8421b | 2003 | int x; |
1da177e4 LT |
2004 | |
2005 | hd = (struct WD33C93_hostdata *) instance->hostdata; | |
2006 | ||
408bb25b | 2007 | /* We accept the following |
a5d8421b | 2008 | * keywords (same format as command-line, but arguments are not optional): |
1da177e4 LT |
2009 | * debug |
2010 | * disconnect | |
2011 | * period | |
2012 | * resync | |
2013 | * proc | |
2014 | * nodma | |
a5d8421b | 2015 | * level2 |
2016 | * burst | |
2017 | * fast | |
2018 | * nosync | |
1da177e4 LT |
2019 | */ |
2020 | ||
408bb25b AV |
2021 | buf[len] = '\0'; |
2022 | for (bp = buf; *bp; ) { | |
2023 | while (',' == *bp || ' ' == *bp) | |
2024 | ++bp; | |
2025 | if (!strncmp(bp, "debug:", 6)) { | |
2026 | hd->args = simple_strtoul(bp+6, &bp, 0) & DB_MASK; | |
2027 | } else if (!strncmp(bp, "disconnect:", 11)) { | |
2028 | x = simple_strtoul(bp+11, &bp, 0); | |
2029 | if (x < DIS_NEVER || x > DIS_ALWAYS) | |
2030 | x = DIS_ADAPTIVE; | |
2031 | hd->disconnect = x; | |
2032 | } else if (!strncmp(bp, "period:", 7)) { | |
2033 | x = simple_strtoul(bp+7, &bp, 0); | |
2034 | hd->default_sx_per = | |
2035 | hd->sx_table[round_period((unsigned int) x, | |
2036 | hd->sx_table)].period_ns; | |
2037 | } else if (!strncmp(bp, "resync:", 7)) { | |
2038 | set_resync(hd, (int)simple_strtoul(bp+7, &bp, 0)); | |
2039 | } else if (!strncmp(bp, "proc:", 5)) { | |
2040 | hd->proc = simple_strtoul(bp+5, &bp, 0); | |
2041 | } else if (!strncmp(bp, "nodma:", 6)) { | |
2042 | hd->no_dma = simple_strtoul(bp+6, &bp, 0); | |
2043 | } else if (!strncmp(bp, "level2:", 7)) { | |
2044 | hd->level2 = simple_strtoul(bp+7, &bp, 0); | |
2045 | } else if (!strncmp(bp, "burst:", 6)) { | |
2046 | hd->dma_mode = | |
2047 | simple_strtol(bp+6, &bp, 0) ? CTRL_BURST:CTRL_DMA; | |
2048 | } else if (!strncmp(bp, "fast:", 5)) { | |
2049 | x = !!simple_strtol(bp+5, &bp, 0); | |
2050 | if (x != hd->fast) | |
2051 | set_resync(hd, 0xff); | |
2052 | hd->fast = x; | |
2053 | } else if (!strncmp(bp, "nosync:", 7)) { | |
a5d8421b | 2054 | x = simple_strtoul(bp+7, &bp, 0); |
408bb25b AV |
2055 | set_resync(hd, x ^ hd->no_sync); |
2056 | hd->no_sync = x; | |
2057 | } else { | |
2058 | break; /* unknown keyword,syntax-error,... */ | |
1da177e4 | 2059 | } |
1da177e4 | 2060 | } |
408bb25b AV |
2061 | return len; |
2062 | #else | |
2063 | return 0; | |
2064 | #endif | |
2065 | } | |
2066 | ||
2067 | int | |
2068 | wd33c93_show_info(struct seq_file *m, struct Scsi_Host *instance) | |
2069 | { | |
2070 | #ifdef PROC_INTERFACE | |
2071 | struct WD33C93_hostdata *hd; | |
2072 | struct scsi_cmnd *cmd; | |
2073 | int x; | |
2074 | ||
2075 | hd = (struct WD33C93_hostdata *) instance->hostdata; | |
1da177e4 LT |
2076 | |
2077 | spin_lock_irq(&hd->lock); | |
408bb25b AV |
2078 | if (hd->proc & PR_VERSION) |
2079 | seq_printf(m, "\nVersion %s - %s.", | |
565502f8 | 2080 | WD33C93_VERSION, WD33C93_DATE); |
408bb25b | 2081 | |
1da177e4 | 2082 | if (hd->proc & PR_INFO) { |
408bb25b | 2083 | seq_printf(m, "\nclock_freq=%02x no_sync=%02x no_dma=%d" |
a5d8421b | 2084 | " dma_mode=%02x fast=%d", |
2085 | hd->clock_freq, hd->no_sync, hd->no_dma, hd->dma_mode, hd->fast); | |
91c40f24 | 2086 | seq_puts(m, "\nsync_xfer[] = "); |
408bb25b AV |
2087 | for (x = 0; x < 7; x++) |
2088 | seq_printf(m, "\t%02x", hd->sync_xfer[x]); | |
91c40f24 | 2089 | seq_puts(m, "\nsync_stat[] = "); |
408bb25b AV |
2090 | for (x = 0; x < 7; x++) |
2091 | seq_printf(m, "\t%02x", hd->sync_stat[x]); | |
1da177e4 LT |
2092 | } |
2093 | #ifdef PROC_STATISTICS | |
2094 | if (hd->proc & PR_STATISTICS) { | |
91c40f24 | 2095 | seq_puts(m, "\ncommands issued: "); |
408bb25b AV |
2096 | for (x = 0; x < 7; x++) |
2097 | seq_printf(m, "\t%ld", hd->cmd_cnt[x]); | |
91c40f24 | 2098 | seq_puts(m, "\ndisconnects allowed:"); |
408bb25b AV |
2099 | for (x = 0; x < 7; x++) |
2100 | seq_printf(m, "\t%ld", hd->disc_allowed_cnt[x]); | |
91c40f24 | 2101 | seq_puts(m, "\ndisconnects done: "); |
408bb25b AV |
2102 | for (x = 0; x < 7; x++) |
2103 | seq_printf(m, "\t%ld", hd->disc_done_cnt[x]); | |
2104 | seq_printf(m, | |
1da177e4 LT |
2105 | "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", |
2106 | hd->int_cnt, hd->dma_cnt, hd->pio_cnt); | |
1da177e4 LT |
2107 | } |
2108 | #endif | |
2109 | if (hd->proc & PR_CONNECTED) { | |
91c40f24 | 2110 | seq_puts(m, "\nconnected: "); |
1da177e4 LT |
2111 | if (hd->connected) { |
2112 | cmd = (struct scsi_cmnd *) hd->connected; | |
9cb78c16 | 2113 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2114 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2115 | } |
2116 | } | |
2117 | if (hd->proc & PR_INPUTQ) { | |
91c40f24 | 2118 | seq_puts(m, "\ninput_Q: "); |
1da177e4 LT |
2119 | cmd = (struct scsi_cmnd *) hd->input_Q; |
2120 | while (cmd) { | |
9cb78c16 | 2121 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2122 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2123 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2124 | } | |
2125 | } | |
2126 | if (hd->proc & PR_DISCQ) { | |
91c40f24 | 2127 | seq_puts(m, "\ndisconnected_Q:"); |
1da177e4 LT |
2128 | cmd = (struct scsi_cmnd *) hd->disconnected_Q; |
2129 | while (cmd) { | |
9cb78c16 | 2130 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2131 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2132 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2133 | } | |
2134 | } | |
f50332ff | 2135 | seq_putc(m, '\n'); |
1da177e4 | 2136 | spin_unlock_irq(&hd->lock); |
1da177e4 | 2137 | #endif /* PROC_INTERFACE */ |
408bb25b | 2138 | return 0; |
1da177e4 LT |
2139 | } |
2140 | ||
1da177e4 LT |
2141 | EXPORT_SYMBOL(wd33c93_host_reset); |
2142 | EXPORT_SYMBOL(wd33c93_init); | |
1da177e4 LT |
2143 | EXPORT_SYMBOL(wd33c93_abort); |
2144 | EXPORT_SYMBOL(wd33c93_queuecommand); | |
2145 | EXPORT_SYMBOL(wd33c93_intr); | |
408bb25b AV |
2146 | EXPORT_SYMBOL(wd33c93_show_info); |
2147 | EXPORT_SYMBOL(wd33c93_write_info); |