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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / wd719x.c
1 /*
2 * Driver for Western Digital WD7193, WD7197 and WD7296 SCSI cards
3 * Copyright 2013 Ondrej Zary
4 *
5 * Original driver by
6 * Aaron Dewell <dewell@woods.net>
7 * Gaerti <Juergen.Gaertner@mbox.si.uni-hannover.de>
8 *
9 * HW documentation available in book:
10 *
11 * SPIDER Command Protocol
12 * by Chandru M. Sippy
13 * SCSI Storage Products (MCP)
14 * Western Digital Corporation
15 * 09-15-95
16 *
17 * http://web.archive.org/web/20070717175254/http://sun1.rrzn.uni-hannover.de/gaertner.juergen/wd719x/Linux/Docu/Spider/
18 */
19
20 /*
21 * Driver workflow:
22 * 1. SCSI command is transformed to SCB (Spider Control Block) by the
23 * queuecommand function.
24 * 2. The address of the SCB is stored in a list to be able to access it, if
25 * something goes wrong.
26 * 3. The address of the SCB is written to the Controller, which loads the SCB
27 * via BM-DMA and processes it.
28 * 4. After it has finished, it generates an interrupt, and sets registers.
29 *
30 * flaws:
31 * - abort/reset functions
32 *
33 * ToDo:
34 * - tagged queueing
35 */
36
37 #include <linux/interrupt.h>
38 #include <linux/module.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/firmware.h>
42 #include <linux/eeprom_93cx6.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_host.h>
46 #include "wd719x.h"
47
48 /* low-level register access */
49 static inline u8 wd719x_readb(struct wd719x *wd, u8 reg)
50 {
51 return ioread8(wd->base + reg);
52 }
53
54 static inline u32 wd719x_readl(struct wd719x *wd, u8 reg)
55 {
56 return ioread32(wd->base + reg);
57 }
58
59 static inline void wd719x_writeb(struct wd719x *wd, u8 reg, u8 val)
60 {
61 iowrite8(val, wd->base + reg);
62 }
63
64 static inline void wd719x_writew(struct wd719x *wd, u8 reg, u16 val)
65 {
66 iowrite16(val, wd->base + reg);
67 }
68
69 static inline void wd719x_writel(struct wd719x *wd, u8 reg, u32 val)
70 {
71 iowrite32(val, wd->base + reg);
72 }
73
74 /* wait until the command register is ready */
75 static inline int wd719x_wait_ready(struct wd719x *wd)
76 {
77 int i = 0;
78
79 do {
80 if (wd719x_readb(wd, WD719X_AMR_COMMAND) == WD719X_CMD_READY)
81 return 0;
82 udelay(1);
83 } while (i++ < WD719X_WAIT_FOR_CMD_READY);
84
85 dev_err(&wd->pdev->dev, "command register is not ready: 0x%02x\n",
86 wd719x_readb(wd, WD719X_AMR_COMMAND));
87
88 return -ETIMEDOUT;
89 }
90
91 /* poll interrupt status register until command finishes */
92 static inline int wd719x_wait_done(struct wd719x *wd, int timeout)
93 {
94 u8 status;
95
96 while (timeout > 0) {
97 status = wd719x_readb(wd, WD719X_AMR_INT_STATUS);
98 if (status)
99 break;
100 timeout--;
101 udelay(1);
102 }
103
104 if (timeout <= 0) {
105 dev_err(&wd->pdev->dev, "direct command timed out\n");
106 return -ETIMEDOUT;
107 }
108
109 if (status != WD719X_INT_NOERRORS) {
110 dev_err(&wd->pdev->dev, "direct command failed, status 0x%02x, SUE 0x%02x\n",
111 status, wd719x_readb(wd, WD719X_AMR_SCB_ERROR));
112 return -EIO;
113 }
114
115 return 0;
116 }
117
118 static int wd719x_direct_cmd(struct wd719x *wd, u8 opcode, u8 dev, u8 lun,
119 u8 tag, dma_addr_t data, int timeout)
120 {
121 int ret = 0;
122
123 /* clear interrupt status register (allow command register to clear) */
124 wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE);
125
126 /* Wait for the Command register to become free */
127 if (wd719x_wait_ready(wd))
128 return -ETIMEDOUT;
129
130 /* make sure we get NO interrupts */
131 dev |= WD719X_DISABLE_INT;
132 wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, dev);
133 wd719x_writeb(wd, WD719X_AMR_CMD_PARAM_2, lun);
134 wd719x_writeb(wd, WD719X_AMR_CMD_PARAM_3, tag);
135 if (data)
136 wd719x_writel(wd, WD719X_AMR_SCB_IN, data);
137
138 /* clear interrupt status register again */
139 wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE);
140
141 /* Now, write the command */
142 wd719x_writeb(wd, WD719X_AMR_COMMAND, opcode);
143
144 if (timeout) /* wait for the command to complete */
145 ret = wd719x_wait_done(wd, timeout);
146
147 /* clear interrupt status register (clean up) */
148 if (opcode != WD719X_CMD_READ_FIRMVER)
149 wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE);
150
151 return ret;
152 }
153
154 static void wd719x_destroy(struct wd719x *wd)
155 {
156 struct wd719x_scb *scb;
157
158 /* stop the RISC */
159 if (wd719x_direct_cmd(wd, WD719X_CMD_SLEEP, 0, 0, 0, 0,
160 WD719X_WAIT_FOR_RISC))
161 dev_warn(&wd->pdev->dev, "RISC sleep command failed\n");
162 /* disable RISC */
163 wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, 0);
164
165 /* free all SCBs */
166 list_for_each_entry(scb, &wd->active_scbs, list)
167 pci_free_consistent(wd->pdev, sizeof(struct wd719x_scb), scb,
168 scb->phys);
169 list_for_each_entry(scb, &wd->free_scbs, list)
170 pci_free_consistent(wd->pdev, sizeof(struct wd719x_scb), scb,
171 scb->phys);
172 /* free internal buffers */
173 pci_free_consistent(wd->pdev, wd->fw_size, wd->fw_virt, wd->fw_phys);
174 wd->fw_virt = NULL;
175 pci_free_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE, wd->hash_virt,
176 wd->hash_phys);
177 wd->hash_virt = NULL;
178 pci_free_consistent(wd->pdev, sizeof(struct wd719x_host_param),
179 wd->params, wd->params_phys);
180 wd->params = NULL;
181 free_irq(wd->pdev->irq, wd);
182 }
183
184 /* finish a SCSI command, mark SCB (if any) as free, unmap buffers */
185 static void wd719x_finish_cmd(struct scsi_cmnd *cmd, int result)
186 {
187 struct wd719x *wd = shost_priv(cmd->device->host);
188 struct wd719x_scb *scb = (struct wd719x_scb *) cmd->host_scribble;
189
190 if (scb) {
191 list_move(&scb->list, &wd->free_scbs);
192 dma_unmap_single(&wd->pdev->dev, cmd->SCp.dma_handle,
193 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
194 scsi_dma_unmap(cmd);
195 }
196 cmd->result = result << 16;
197 cmd->scsi_done(cmd);
198 }
199
200 /* Build a SCB and send it to the card */
201 static int wd719x_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
202 {
203 int i, count_sg;
204 unsigned long flags;
205 struct wd719x_scb *scb;
206 struct wd719x *wd = shost_priv(sh);
207 dma_addr_t phys;
208
209 cmd->host_scribble = NULL;
210
211 /* get a free SCB - either from existing ones or allocate a new one */
212 spin_lock_irqsave(wd->sh->host_lock, flags);
213 scb = list_first_entry_or_null(&wd->free_scbs, struct wd719x_scb, list);
214 if (scb) {
215 list_del(&scb->list);
216 phys = scb->phys;
217 } else {
218 spin_unlock_irqrestore(wd->sh->host_lock, flags);
219 scb = pci_alloc_consistent(wd->pdev, sizeof(struct wd719x_scb),
220 &phys);
221 spin_lock_irqsave(wd->sh->host_lock, flags);
222 if (!scb) {
223 dev_err(&wd->pdev->dev, "unable to allocate SCB\n");
224 wd719x_finish_cmd(cmd, DID_ERROR);
225 spin_unlock_irqrestore(wd->sh->host_lock, flags);
226 return 0;
227 }
228 }
229 memset(scb, 0, sizeof(struct wd719x_scb));
230 list_add(&scb->list, &wd->active_scbs);
231
232 scb->phys = phys;
233 scb->cmd = cmd;
234 cmd->host_scribble = (char *) scb;
235
236 scb->CDB_tag = 0; /* Tagged queueing not supported yet */
237 scb->devid = cmd->device->id;
238 scb->lun = cmd->device->lun;
239
240 /* copy the command */
241 memcpy(scb->CDB, cmd->cmnd, cmd->cmd_len);
242
243 /* map sense buffer */
244 scb->sense_buf_length = SCSI_SENSE_BUFFERSIZE;
245 cmd->SCp.dma_handle = dma_map_single(&wd->pdev->dev, cmd->sense_buffer,
246 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
247 scb->sense_buf = cpu_to_le32(cmd->SCp.dma_handle);
248
249 /* request autosense */
250 scb->SCB_options |= WD719X_SCB_FLAGS_AUTO_REQUEST_SENSE;
251
252 /* check direction */
253 if (cmd->sc_data_direction == DMA_TO_DEVICE)
254 scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION
255 | WD719X_SCB_FLAGS_PCI_TO_SCSI;
256 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
257 scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION;
258
259 /* Scather/gather */
260 count_sg = scsi_dma_map(cmd);
261 if (count_sg < 0) {
262 wd719x_finish_cmd(cmd, DID_ERROR);
263 spin_unlock_irqrestore(wd->sh->host_lock, flags);
264 return 0;
265 }
266 BUG_ON(count_sg > WD719X_SG);
267
268 if (count_sg) {
269 struct scatterlist *sg;
270
271 scb->data_length = cpu_to_le32(count_sg *
272 sizeof(struct wd719x_sglist));
273 scb->data_p = cpu_to_le32(scb->phys +
274 offsetof(struct wd719x_scb, sg_list));
275
276 scsi_for_each_sg(cmd, sg, count_sg, i) {
277 scb->sg_list[i].ptr = cpu_to_le32(sg_dma_address(sg));
278 scb->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
279 }
280 scb->SCB_options |= WD719X_SCB_FLAGS_DO_SCATTER_GATHER;
281 } else { /* zero length */
282 scb->data_length = 0;
283 scb->data_p = 0;
284 }
285
286 /* check if the Command register is free */
287 if (wd719x_readb(wd, WD719X_AMR_COMMAND) != WD719X_CMD_READY) {
288 spin_unlock_irqrestore(wd->sh->host_lock, flags);
289 return SCSI_MLQUEUE_HOST_BUSY;
290 }
291
292 /* write pointer to the AMR */
293 wd719x_writel(wd, WD719X_AMR_SCB_IN, scb->phys);
294 /* send SCB opcode */
295 wd719x_writeb(wd, WD719X_AMR_COMMAND, WD719X_CMD_PROCESS_SCB);
296
297 spin_unlock_irqrestore(wd->sh->host_lock, flags);
298
299 return 0;
300 }
301
302 static int wd719x_chip_init(struct wd719x *wd)
303 {
304 int i, ret;
305 u32 risc_init[3];
306 const struct firmware *fw_wcs, *fw_risc;
307 const char fwname_wcs[] = "wd719x-wcs.bin";
308 const char fwname_risc[] = "wd719x-risc.bin";
309
310 memset(wd->hash_virt, 0, WD719X_HASH_TABLE_SIZE);
311
312 /* WCS (sequencer) firmware */
313 ret = request_firmware(&fw_wcs, fwname_wcs, &wd->pdev->dev);
314 if (ret) {
315 dev_err(&wd->pdev->dev, "Unable to load firmware %s: %d\n",
316 fwname_wcs, ret);
317 return ret;
318 }
319 /* RISC firmware */
320 ret = request_firmware(&fw_risc, fwname_risc, &wd->pdev->dev);
321 if (ret) {
322 dev_err(&wd->pdev->dev, "Unable to load firmware %s: %d\n",
323 fwname_risc, ret);
324 release_firmware(fw_wcs);
325 return ret;
326 }
327 wd->fw_size = ALIGN(fw_wcs->size, 4) + fw_risc->size;
328
329 if (!wd->fw_virt)
330 wd->fw_virt = pci_alloc_consistent(wd->pdev, wd->fw_size,
331 &wd->fw_phys);
332 if (!wd->fw_virt) {
333 ret = -ENOMEM;
334 goto wd719x_init_end;
335 }
336
337 /* make a fresh copy of WCS and RISC code */
338 memcpy(wd->fw_virt, fw_wcs->data, fw_wcs->size);
339 memcpy(wd->fw_virt + ALIGN(fw_wcs->size, 4), fw_risc->data,
340 fw_risc->size);
341
342 /* Reset the Spider Chip and adapter itself */
343 wd719x_writeb(wd, WD719X_PCI_PORT_RESET, WD719X_PCI_RESET);
344 udelay(WD719X_WAIT_FOR_RISC);
345 /* Clear PIO mode bits set by BIOS */
346 wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, 0);
347 /* ensure RISC is not running */
348 wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, 0);
349 /* ensure command port is ready */
350 wd719x_writeb(wd, WD719X_AMR_COMMAND, 0);
351 if (wd719x_wait_ready(wd)) {
352 ret = -ETIMEDOUT;
353 goto wd719x_init_end;
354 }
355
356 /* Transfer the first 2K words of RISC code to kick start the uP */
357 risc_init[0] = wd->fw_phys; /* WCS FW */
358 risc_init[1] = wd->fw_phys + ALIGN(fw_wcs->size, 4); /* RISC FW */
359 risc_init[2] = wd->hash_phys; /* hash table */
360
361 /* clear DMA status */
362 wd719x_writeb(wd, WD719X_PCI_CHANNEL2_3STATUS, 0);
363
364 /* address to read firmware from */
365 wd719x_writel(wd, WD719X_PCI_EXTERNAL_ADDR, risc_init[1]);
366 /* base address to write firmware to (on card) */
367 wd719x_writew(wd, WD719X_PCI_INTERNAL_ADDR, WD719X_PRAM_BASE_ADDR);
368 /* size: first 2K words */
369 wd719x_writew(wd, WD719X_PCI_DMA_TRANSFER_SIZE, 2048 * 2);
370 /* start DMA */
371 wd719x_writeb(wd, WD719X_PCI_CHANNEL2_3CMD, WD719X_START_CHANNEL2_3DMA);
372
373 /* wait for DMA to complete */
374 i = WD719X_WAIT_FOR_RISC;
375 while (i-- > 0) {
376 u8 status = wd719x_readb(wd, WD719X_PCI_CHANNEL2_3STATUS);
377 if (status == WD719X_START_CHANNEL2_3DONE)
378 break;
379 if (status == WD719X_START_CHANNEL2_3ABORT) {
380 dev_warn(&wd->pdev->dev, "RISC bootstrap failed: DMA aborted\n");
381 ret = -EIO;
382 goto wd719x_init_end;
383 }
384 udelay(1);
385 }
386 if (i < 1) {
387 dev_warn(&wd->pdev->dev, "RISC bootstrap failed: DMA timeout\n");
388 ret = -ETIMEDOUT;
389 goto wd719x_init_end;
390 }
391
392 /* firmware is loaded, now initialize and wake up the RISC */
393 /* write RISC initialization long words to Spider */
394 wd719x_writel(wd, WD719X_AMR_SCB_IN, risc_init[0]);
395 wd719x_writel(wd, WD719X_AMR_SCB_IN + 4, risc_init[1]);
396 wd719x_writel(wd, WD719X_AMR_SCB_IN + 8, risc_init[2]);
397
398 /* disable interrupts during initialization of RISC */
399 wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, WD719X_DISABLE_INT);
400
401 /* issue INITIALIZE RISC comand */
402 wd719x_writeb(wd, WD719X_AMR_COMMAND, WD719X_CMD_INIT_RISC);
403 /* enable advanced mode (wake up RISC) */
404 wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, WD719X_ENABLE_ADVANCE_MODE);
405 udelay(WD719X_WAIT_FOR_RISC);
406
407 ret = wd719x_wait_done(wd, WD719X_WAIT_FOR_RISC);
408 /* clear interrupt status register */
409 wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE);
410 if (ret) {
411 dev_warn(&wd->pdev->dev, "Unable to initialize RISC\n");
412 goto wd719x_init_end;
413 }
414 /* RISC is up and running */
415
416 /* Read FW version from RISC */
417 ret = wd719x_direct_cmd(wd, WD719X_CMD_READ_FIRMVER, 0, 0, 0, 0,
418 WD719X_WAIT_FOR_RISC);
419 if (ret) {
420 dev_warn(&wd->pdev->dev, "Unable to read firmware version\n");
421 goto wd719x_init_end;
422 }
423 dev_info(&wd->pdev->dev, "RISC initialized with firmware version %.2x.%.2x\n",
424 wd719x_readb(wd, WD719X_AMR_SCB_OUT + 1),
425 wd719x_readb(wd, WD719X_AMR_SCB_OUT));
426
427 /* RESET SCSI bus */
428 ret = wd719x_direct_cmd(wd, WD719X_CMD_BUSRESET, 0, 0, 0, 0,
429 WD719X_WAIT_FOR_SCSI_RESET);
430 if (ret) {
431 dev_warn(&wd->pdev->dev, "SCSI bus reset failed\n");
432 goto wd719x_init_end;
433 }
434
435 /* use HostParameter structure to set Spider's Host Parameter Block */
436 ret = wd719x_direct_cmd(wd, WD719X_CMD_SET_PARAM, 0,
437 sizeof(struct wd719x_host_param), 0,
438 wd->params_phys, WD719X_WAIT_FOR_RISC);
439 if (ret) {
440 dev_warn(&wd->pdev->dev, "Failed to set HOST PARAMETERS\n");
441 goto wd719x_init_end;
442 }
443
444 /* initiate SCAM (does nothing if disabled in BIOS) */
445 /* bug?: we should pass a mask of static IDs which we don't have */
446 ret = wd719x_direct_cmd(wd, WD719X_CMD_INIT_SCAM, 0, 0, 0, 0,
447 WD719X_WAIT_FOR_SCSI_RESET);
448 if (ret) {
449 dev_warn(&wd->pdev->dev, "SCAM initialization failed\n");
450 goto wd719x_init_end;
451 }
452
453 /* clear AMR_BIOS_SHARE_INT register */
454 wd719x_writeb(wd, WD719X_AMR_BIOS_SHARE_INT, 0);
455
456 wd719x_init_end:
457 release_firmware(fw_wcs);
458 release_firmware(fw_risc);
459
460 return ret;
461 }
462
463 static int wd719x_abort(struct scsi_cmnd *cmd)
464 {
465 int action, result;
466 unsigned long flags;
467 struct wd719x_scb *scb = (struct wd719x_scb *)cmd->host_scribble;
468 struct wd719x *wd = shost_priv(cmd->device->host);
469
470 dev_info(&wd->pdev->dev, "abort command, tag: %x\n", cmd->tag);
471
472 action = /*cmd->tag ? WD719X_CMD_ABORT_TAG : */WD719X_CMD_ABORT;
473
474 spin_lock_irqsave(wd->sh->host_lock, flags);
475 result = wd719x_direct_cmd(wd, action, cmd->device->id,
476 cmd->device->lun, cmd->tag, scb->phys, 0);
477 spin_unlock_irqrestore(wd->sh->host_lock, flags);
478 if (result)
479 return FAILED;
480
481 return SUCCESS;
482 }
483
484 static int wd719x_reset(struct scsi_cmnd *cmd, u8 opcode, u8 device)
485 {
486 int result;
487 unsigned long flags;
488 struct wd719x *wd = shost_priv(cmd->device->host);
489
490 dev_info(&wd->pdev->dev, "%s reset requested\n",
491 (opcode == WD719X_CMD_BUSRESET) ? "bus" : "device");
492
493 spin_lock_irqsave(wd->sh->host_lock, flags);
494 result = wd719x_direct_cmd(wd, opcode, device, 0, 0, 0,
495 WD719X_WAIT_FOR_SCSI_RESET);
496 spin_unlock_irqrestore(wd->sh->host_lock, flags);
497 if (result)
498 return FAILED;
499
500 return SUCCESS;
501 }
502
503 static int wd719x_dev_reset(struct scsi_cmnd *cmd)
504 {
505 return wd719x_reset(cmd, WD719X_CMD_RESET, cmd->device->id);
506 }
507
508 static int wd719x_bus_reset(struct scsi_cmnd *cmd)
509 {
510 return wd719x_reset(cmd, WD719X_CMD_BUSRESET, 0);
511 }
512
513 static int wd719x_host_reset(struct scsi_cmnd *cmd)
514 {
515 struct wd719x *wd = shost_priv(cmd->device->host);
516 struct wd719x_scb *scb, *tmp;
517 unsigned long flags;
518 int result;
519
520 dev_info(&wd->pdev->dev, "host reset requested\n");
521 spin_lock_irqsave(wd->sh->host_lock, flags);
522 /* Try to reinit the RISC */
523 if (wd719x_chip_init(wd) == 0)
524 result = SUCCESS;
525 else
526 result = FAILED;
527
528 /* flush all SCBs */
529 list_for_each_entry_safe(scb, tmp, &wd->active_scbs, list) {
530 struct scsi_cmnd *tmp_cmd = scb->cmd;
531 wd719x_finish_cmd(tmp_cmd, result);
532 }
533 spin_unlock_irqrestore(wd->sh->host_lock, flags);
534
535 return result;
536 }
537
538 static int wd719x_biosparam(struct scsi_device *sdev, struct block_device *bdev,
539 sector_t capacity, int geom[])
540 {
541 if (capacity >= 0x200000) {
542 geom[0] = 255; /* heads */
543 geom[1] = 63; /* sectors */
544 } else {
545 geom[0] = 64; /* heads */
546 geom[1] = 32; /* sectors */
547 }
548 geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
549
550 return 0;
551 }
552
553 /* process a SCB-completion interrupt */
554 static inline void wd719x_interrupt_SCB(struct wd719x *wd,
555 union wd719x_regs regs,
556 struct wd719x_scb *scb)
557 {
558 struct scsi_cmnd *cmd;
559 int result;
560
561 /* now have to find result from card */
562 switch (regs.bytes.SUE) {
563 case WD719X_SUE_NOERRORS:
564 result = DID_OK;
565 break;
566 case WD719X_SUE_REJECTED:
567 dev_err(&wd->pdev->dev, "command rejected\n");
568 result = DID_ERROR;
569 break;
570 case WD719X_SUE_SCBQFULL:
571 dev_err(&wd->pdev->dev, "SCB queue is full\n");
572 result = DID_ERROR;
573 break;
574 case WD719X_SUE_TERM:
575 dev_dbg(&wd->pdev->dev, "SCB terminated by direct command\n");
576 result = DID_ABORT; /* or DID_RESET? */
577 break;
578 case WD719X_SUE_CHAN1ABORT:
579 case WD719X_SUE_CHAN23ABORT:
580 result = DID_ABORT;
581 dev_err(&wd->pdev->dev, "DMA abort\n");
582 break;
583 case WD719X_SUE_CHAN1PAR:
584 case WD719X_SUE_CHAN23PAR:
585 result = DID_PARITY;
586 dev_err(&wd->pdev->dev, "DMA parity error\n");
587 break;
588 case WD719X_SUE_TIMEOUT:
589 result = DID_TIME_OUT;
590 dev_dbg(&wd->pdev->dev, "selection timeout\n");
591 break;
592 case WD719X_SUE_RESET:
593 dev_dbg(&wd->pdev->dev, "bus reset occurred\n");
594 result = DID_RESET;
595 break;
596 case WD719X_SUE_BUSERROR:
597 dev_dbg(&wd->pdev->dev, "SCSI bus error\n");
598 result = DID_ERROR;
599 break;
600 case WD719X_SUE_WRONGWAY:
601 dev_err(&wd->pdev->dev, "wrong data transfer direction\n");
602 result = DID_ERROR;
603 break;
604 case WD719X_SUE_BADPHASE:
605 dev_err(&wd->pdev->dev, "invalid SCSI phase\n");
606 result = DID_ERROR;
607 break;
608 case WD719X_SUE_TOOLONG:
609 dev_err(&wd->pdev->dev, "record too long\n");
610 result = DID_ERROR;
611 break;
612 case WD719X_SUE_BUSFREE:
613 dev_err(&wd->pdev->dev, "unexpected bus free\n");
614 result = DID_NO_CONNECT; /* or DID_ERROR ???*/
615 break;
616 case WD719X_SUE_ARSDONE:
617 dev_dbg(&wd->pdev->dev, "auto request sense\n");
618 if (regs.bytes.SCSI == 0)
619 result = DID_OK;
620 else
621 result = DID_PARITY;
622 break;
623 case WD719X_SUE_IGNORED:
624 dev_err(&wd->pdev->dev, "target id %d ignored command\n",
625 scb->cmd->device->id);
626 result = DID_NO_CONNECT;
627 break;
628 case WD719X_SUE_WRONGTAGS:
629 dev_err(&wd->pdev->dev, "reversed tags\n");
630 result = DID_ERROR;
631 break;
632 case WD719X_SUE_BADTAGS:
633 dev_err(&wd->pdev->dev, "tag type not supported by target\n");
634 result = DID_ERROR;
635 break;
636 case WD719X_SUE_NOSCAMID:
637 dev_err(&wd->pdev->dev, "no SCAM soft ID available\n");
638 result = DID_ERROR;
639 break;
640 default:
641 dev_warn(&wd->pdev->dev, "unknown SUE error code: 0x%x\n",
642 regs.bytes.SUE);
643 result = DID_ERROR;
644 break;
645 }
646 cmd = scb->cmd;
647
648 wd719x_finish_cmd(cmd, result);
649 }
650
651 static irqreturn_t wd719x_interrupt(int irq, void *dev_id)
652 {
653 struct wd719x *wd = dev_id;
654 union wd719x_regs regs;
655 unsigned long flags;
656 u32 SCB_out;
657
658 spin_lock_irqsave(wd->sh->host_lock, flags);
659 /* read SCB pointer back from card */
660 SCB_out = wd719x_readl(wd, WD719X_AMR_SCB_OUT);
661 /* read all status info at once */
662 regs.all = cpu_to_le32(wd719x_readl(wd, WD719X_AMR_OP_CODE));
663
664 switch (regs.bytes.INT) {
665 case WD719X_INT_NONE:
666 spin_unlock_irqrestore(wd->sh->host_lock, flags);
667 return IRQ_NONE;
668 case WD719X_INT_LINKNOSTATUS:
669 dev_err(&wd->pdev->dev, "linked command completed with no status\n");
670 break;
671 case WD719X_INT_BADINT:
672 dev_err(&wd->pdev->dev, "unsolicited interrupt\n");
673 break;
674 case WD719X_INT_NOERRORS:
675 case WD719X_INT_LINKNOERRORS:
676 case WD719X_INT_ERRORSLOGGED:
677 case WD719X_INT_SPIDERFAILED:
678 /* was the cmd completed a direct or SCB command? */
679 if (regs.bytes.OPC == WD719X_CMD_PROCESS_SCB) {
680 struct wd719x_scb *scb;
681 list_for_each_entry(scb, &wd->active_scbs, list)
682 if (SCB_out == scb->phys)
683 break;
684 if (SCB_out == scb->phys)
685 wd719x_interrupt_SCB(wd, regs, scb);
686 else
687 dev_err(&wd->pdev->dev, "card returned invalid SCB pointer\n");
688 } else
689 dev_warn(&wd->pdev->dev, "direct command 0x%x completed\n",
690 regs.bytes.OPC);
691 break;
692 case WD719X_INT_PIOREADY:
693 dev_err(&wd->pdev->dev, "card indicates PIO data ready but we never use PIO\n");
694 /* interrupt will not be cleared until all data is read */
695 break;
696 default:
697 dev_err(&wd->pdev->dev, "unknown interrupt reason: %d\n",
698 regs.bytes.INT);
699
700 }
701 /* clear interrupt so another can happen */
702 wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE);
703 spin_unlock_irqrestore(wd->sh->host_lock, flags);
704
705 return IRQ_HANDLED;
706 }
707
708 static void wd719x_eeprom_reg_read(struct eeprom_93cx6 *eeprom)
709 {
710 struct wd719x *wd = eeprom->data;
711 u8 reg = wd719x_readb(wd, WD719X_PCI_GPIO_DATA);
712
713 eeprom->reg_data_out = reg & WD719X_EE_DO;
714 }
715
716 static void wd719x_eeprom_reg_write(struct eeprom_93cx6 *eeprom)
717 {
718 struct wd719x *wd = eeprom->data;
719 u8 reg = 0;
720
721 if (eeprom->reg_data_in)
722 reg |= WD719X_EE_DI;
723 if (eeprom->reg_data_clock)
724 reg |= WD719X_EE_CLK;
725 if (eeprom->reg_chip_select)
726 reg |= WD719X_EE_CS;
727
728 wd719x_writeb(wd, WD719X_PCI_GPIO_DATA, reg);
729 }
730
731 /* read config from EEPROM so it can be downloaded by the RISC on (re-)init */
732 static void wd719x_read_eeprom(struct wd719x *wd)
733 {
734 struct eeprom_93cx6 eeprom;
735 u8 gpio;
736 struct wd719x_eeprom_header header;
737
738 eeprom.data = wd;
739 eeprom.register_read = wd719x_eeprom_reg_read;
740 eeprom.register_write = wd719x_eeprom_reg_write;
741 eeprom.width = PCI_EEPROM_WIDTH_93C46;
742
743 /* set all outputs to low */
744 wd719x_writeb(wd, WD719X_PCI_GPIO_DATA, 0);
745 /* configure GPIO pins */
746 gpio = wd719x_readb(wd, WD719X_PCI_GPIO_CONTROL);
747 /* GPIO outputs */
748 gpio &= (~(WD719X_EE_CLK | WD719X_EE_DI | WD719X_EE_CS));
749 /* GPIO input */
750 gpio |= WD719X_EE_DO;
751 wd719x_writeb(wd, WD719X_PCI_GPIO_CONTROL, gpio);
752
753 /* read EEPROM header */
754 eeprom_93cx6_multireadb(&eeprom, 0, (u8 *)&header, sizeof(header));
755
756 if (header.sig1 == 'W' && header.sig2 == 'D')
757 eeprom_93cx6_multireadb(&eeprom, header.cfg_offset,
758 (u8 *)wd->params,
759 sizeof(struct wd719x_host_param));
760 else { /* default EEPROM values */
761 dev_warn(&wd->pdev->dev, "EEPROM signature is invalid (0x%02x 0x%02x), using default values\n",
762 header.sig1, header.sig2);
763 wd->params->ch_1_th = 0x10; /* 16 DWs = 64 B */
764 wd->params->scsi_conf = 0x4c; /* 48ma, spue, parity check */
765 wd->params->own_scsi_id = 0x07; /* ID 7, SCAM disabled */
766 wd->params->sel_timeout = 0x4d; /* 250 ms */
767 wd->params->sleep_timer = 0x01;
768 wd->params->cdb_size = cpu_to_le16(0x5555); /* all 6 B */
769 wd->params->scsi_pad = 0x1b;
770 if (wd->type == WD719X_TYPE_7193) /* narrow card - disable */
771 wd->params->wide = cpu_to_le32(0x00000000);
772 else /* initiate & respond to WIDE messages */
773 wd->params->wide = cpu_to_le32(0xffffffff);
774 wd->params->sync = cpu_to_le32(0xffffffff);
775 wd->params->soft_mask = 0x00; /* all disabled */
776 wd->params->unsol_mask = 0x00; /* all disabled */
777 }
778 /* disable TAGGED messages */
779 wd->params->tag_en = cpu_to_le16(0x0000);
780 }
781
782 /* Read card type from GPIO bits 1 and 3 */
783 static enum wd719x_card_type wd719x_detect_type(struct wd719x *wd)
784 {
785 u8 card = wd719x_readb(wd, WD719X_PCI_GPIO_CONTROL);
786
787 card |= WD719X_GPIO_ID_BITS;
788 wd719x_writeb(wd, WD719X_PCI_GPIO_CONTROL, card);
789 card = wd719x_readb(wd, WD719X_PCI_GPIO_DATA) & WD719X_GPIO_ID_BITS;
790 switch (card) {
791 case 0x08:
792 return WD719X_TYPE_7193;
793 case 0x02:
794 return WD719X_TYPE_7197;
795 case 0x00:
796 return WD719X_TYPE_7296;
797 default:
798 dev_warn(&wd->pdev->dev, "unknown card type 0x%x\n", card);
799 return WD719X_TYPE_UNKNOWN;
800 }
801 }
802
803 static int wd719x_board_found(struct Scsi_Host *sh)
804 {
805 struct wd719x *wd = shost_priv(sh);
806 char *card_types[] = { "Unknown card", "WD7193", "WD7197", "WD7296" };
807 int ret;
808
809 INIT_LIST_HEAD(&wd->active_scbs);
810 INIT_LIST_HEAD(&wd->free_scbs);
811
812 sh->base = pci_resource_start(wd->pdev, 0);
813
814 wd->type = wd719x_detect_type(wd);
815
816 wd->sh = sh;
817 sh->irq = wd->pdev->irq;
818 wd->fw_virt = NULL;
819
820 /* memory area for host (EEPROM) parameters */
821 wd->params = pci_alloc_consistent(wd->pdev,
822 sizeof(struct wd719x_host_param),
823 &wd->params_phys);
824 if (!wd->params) {
825 dev_warn(&wd->pdev->dev, "unable to allocate parameter buffer\n");
826 return -ENOMEM;
827 }
828
829 /* memory area for the RISC for hash table of outstanding requests */
830 wd->hash_virt = pci_alloc_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE,
831 &wd->hash_phys);
832 if (!wd->hash_virt) {
833 dev_warn(&wd->pdev->dev, "unable to allocate hash buffer\n");
834 ret = -ENOMEM;
835 goto fail_free_params;
836 }
837
838 ret = request_irq(wd->pdev->irq, wd719x_interrupt, IRQF_SHARED,
839 "wd719x", wd);
840 if (ret) {
841 dev_warn(&wd->pdev->dev, "unable to assign IRQ %d\n",
842 wd->pdev->irq);
843 goto fail_free_hash;
844 }
845
846 /* read parameters from EEPROM */
847 wd719x_read_eeprom(wd);
848
849 ret = wd719x_chip_init(wd);
850 if (ret)
851 goto fail_free_irq;
852
853 sh->this_id = wd->params->own_scsi_id & WD719X_EE_SCSI_ID_MASK;
854
855 dev_info(&wd->pdev->dev, "%s at I/O 0x%lx, IRQ %u, SCSI ID %d\n",
856 card_types[wd->type], sh->base, sh->irq, sh->this_id);
857
858 return 0;
859
860 fail_free_irq:
861 free_irq(wd->pdev->irq, wd);
862 fail_free_hash:
863 pci_free_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE, wd->hash_virt,
864 wd->hash_phys);
865 fail_free_params:
866 pci_free_consistent(wd->pdev, sizeof(struct wd719x_host_param),
867 wd->params, wd->params_phys);
868
869 return ret;
870 }
871
872 static struct scsi_host_template wd719x_template = {
873 .module = THIS_MODULE,
874 .name = "Western Digital 719x",
875 .queuecommand = wd719x_queuecommand,
876 .eh_abort_handler = wd719x_abort,
877 .eh_device_reset_handler = wd719x_dev_reset,
878 .eh_bus_reset_handler = wd719x_bus_reset,
879 .eh_host_reset_handler = wd719x_host_reset,
880 .bios_param = wd719x_biosparam,
881 .proc_name = "wd719x",
882 .can_queue = 255,
883 .this_id = 7,
884 .sg_tablesize = WD719X_SG,
885 .use_clustering = ENABLE_CLUSTERING,
886 };
887
888 static int wd719x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *d)
889 {
890 int err;
891 struct Scsi_Host *sh;
892 struct wd719x *wd;
893
894 err = pci_enable_device(pdev);
895 if (err)
896 goto fail;
897
898 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
899 dev_warn(&pdev->dev, "Unable to set 32-bit DMA mask\n");
900 goto disable_device;
901 }
902
903 err = pci_request_regions(pdev, "wd719x");
904 if (err)
905 goto disable_device;
906 pci_set_master(pdev);
907
908 err = -ENODEV;
909 if (pci_resource_len(pdev, 0) == 0)
910 goto release_region;
911
912 err = -ENOMEM;
913 sh = scsi_host_alloc(&wd719x_template, sizeof(struct wd719x));
914 if (!sh)
915 goto release_region;
916
917 wd = shost_priv(sh);
918 wd->base = pci_iomap(pdev, 0, 0);
919 if (!wd->base)
920 goto free_host;
921 wd->pdev = pdev;
922
923 err = wd719x_board_found(sh);
924 if (err)
925 goto unmap;
926
927 err = scsi_add_host(sh, &wd->pdev->dev);
928 if (err)
929 goto destroy;
930
931 scsi_scan_host(sh);
932
933 pci_set_drvdata(pdev, sh);
934 return 0;
935
936 destroy:
937 wd719x_destroy(wd);
938 unmap:
939 pci_iounmap(pdev, wd->base);
940 free_host:
941 scsi_host_put(sh);
942 release_region:
943 pci_release_regions(pdev);
944 disable_device:
945 pci_disable_device(pdev);
946 fail:
947 return err;
948 }
949
950
951 static void wd719x_pci_remove(struct pci_dev *pdev)
952 {
953 struct Scsi_Host *sh = pci_get_drvdata(pdev);
954 struct wd719x *wd = shost_priv(sh);
955
956 scsi_remove_host(sh);
957 wd719x_destroy(wd);
958 pci_iounmap(pdev, wd->base);
959 pci_release_regions(pdev);
960 pci_disable_device(pdev);
961
962 scsi_host_put(sh);
963 }
964
965 static const struct pci_device_id wd719x_pci_table[] = {
966 { PCI_DEVICE(PCI_VENDOR_ID_WD, 0x3296) },
967 {}
968 };
969
970 MODULE_DEVICE_TABLE(pci, wd719x_pci_table);
971
972 static struct pci_driver wd719x_pci_driver = {
973 .name = "wd719x",
974 .id_table = wd719x_pci_table,
975 .probe = wd719x_pci_probe,
976 .remove = wd719x_pci_remove,
977 };
978
979 static int __init wd719x_init(void)
980 {
981 return pci_register_driver(&wd719x_pci_driver);
982 }
983
984 static void __exit wd719x_exit(void)
985 {
986 pci_unregister_driver(&wd719x_pci_driver);
987 }
988
989 module_init(wd719x_init);
990 module_exit(wd719x_exit);
991
992 MODULE_DESCRIPTION("Western Digital WD7193/7197/7296 SCSI driver");
993 MODULE_AUTHOR("Ondrej Zary, Aaron Dewell, Juergen Gaertner");
994 MODULE_LICENSE("GPL");
995 MODULE_FIRMWARE("wd719x-wcs.bin");
996 MODULE_FIRMWARE("wd719x-risc.bin");
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