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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / ata / sata_sil.c
blobb42edaaf3a53cc8dcfdcaf0135670c65cad7b6e0
1 /*
2 * sata_sil.c - Silicon Image SATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2005 Red Hat, Inc.
9 * Copyright 2003 Benjamin Herrenschmidt
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Documentation for SiI 3112:
31 * http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
32 *
33 * Other errata and documentation available under NDA.
34 *
35 */
36
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/pci.h>
40 #include <linux/init.h>
41 #include <linux/blkdev.h>
42 #include <linux/delay.h>
43 #include <linux/interrupt.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <linux/libata.h>
47 #include <linux/dmi.h>
48
49 #define DRV_NAME "sata_sil"
50 #define DRV_VERSION "2.4"
51
52 #define SIL_DMA_BOUNDARY 0x7fffffffUL
53
54 enum {
55 SIL_MMIO_BAR = 5,
56
57 /*
58 * host flags
59 */
60 SIL_FLAG_NO_SATA_IRQ = (1 << 28),
61 SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
62 SIL_FLAG_MOD15WRITE = (1 << 30),
63
64 SIL_DFL_PORT_FLAGS = ATA_FLAG_SATA,
65
66 /*
67 * Controller IDs
68 */
69 sil_3112 = 0,
70 sil_3112_no_sata_irq = 1,
71 sil_3512 = 2,
72 sil_3114 = 3,
73
74 /*
75 * Register offsets
76 */
77 SIL_SYSCFG = 0x48,
78
79 /*
80 * Register bits
81 */
82 /* SYSCFG */
83 SIL_MASK_IDE0_INT = (1 << 22),
84 SIL_MASK_IDE1_INT = (1 << 23),
85 SIL_MASK_IDE2_INT = (1 << 24),
86 SIL_MASK_IDE3_INT = (1 << 25),
87 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
88 SIL_MASK_4PORT = SIL_MASK_2PORT |
89 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
90
91 /* BMDMA/BMDMA2 */
92 SIL_INTR_STEERING = (1 << 1),
93
94 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */
95 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */
96 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */
97 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */
98 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */
99 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */
100 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */
101 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */
102 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */
103 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */
104
105 /* SIEN */
106 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */
107
108 /*
109 * Others
110 */
111 SIL_QUIRK_MOD15WRITE = (1 << 0),
112 SIL_QUIRK_UDMA5MAX = (1 << 1),
113 };
114
115 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
116 #ifdef CONFIG_PM
117 static int sil_pci_device_resume(struct pci_dev *pdev);
118 #endif
119 static void sil_dev_config(struct ata_device *dev);
120 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
121 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
122 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
123 static void sil_qc_prep(struct ata_queued_cmd *qc);
124 static void sil_bmdma_setup(struct ata_queued_cmd *qc);
125 static void sil_bmdma_start(struct ata_queued_cmd *qc);
126 static void sil_bmdma_stop(struct ata_queued_cmd *qc);
127 static void sil_freeze(struct ata_port *ap);
128 static void sil_thaw(struct ata_port *ap);
129
130
131 static const struct pci_device_id sil_pci_tbl[] = {
132 { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
133 { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
134 { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
135 { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
136 { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
137 { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
138 { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
139
140 { } /* terminate list */
141 };
142
143
144 /* TODO firmware versions should be added - eric */
145 static const struct sil_drivelist {
146 const char *product;
147 unsigned int quirk;
148 } sil_blacklist [] = {
149 { "ST320012AS", SIL_QUIRK_MOD15WRITE },
150 { "ST330013AS", SIL_QUIRK_MOD15WRITE },
151 { "ST340017AS", SIL_QUIRK_MOD15WRITE },
152 { "ST360015AS", SIL_QUIRK_MOD15WRITE },
153 { "ST380023AS", SIL_QUIRK_MOD15WRITE },
154 { "ST3120023AS", SIL_QUIRK_MOD15WRITE },
155 { "ST340014ASL", SIL_QUIRK_MOD15WRITE },
156 { "ST360014ASL", SIL_QUIRK_MOD15WRITE },
157 { "ST380011ASL", SIL_QUIRK_MOD15WRITE },
158 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
159 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
160 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
161 { }
162 };
163
164 static struct pci_driver sil_pci_driver = {
165 .name = DRV_NAME,
166 .id_table = sil_pci_tbl,
167 .probe = sil_init_one,
168 .remove = ata_pci_remove_one,
169 #ifdef CONFIG_PM
170 .suspend = ata_pci_device_suspend,
171 .resume = sil_pci_device_resume,
172 #endif
173 };
174
175 static struct scsi_host_template sil_sht = {
176 ATA_BASE_SHT(DRV_NAME),
177 /** These controllers support Large Block Transfer which allows
178 transfer chunks up to 2GB and which cross 64KB boundaries,
179 therefore the DMA limits are more relaxed than standard ATA SFF. */
180 .dma_boundary = SIL_DMA_BOUNDARY,
181 .sg_tablesize = ATA_MAX_PRD
182 };
183
184 static struct ata_port_operations sil_ops = {
185 .inherits = &ata_bmdma32_port_ops,
186 .dev_config = sil_dev_config,
187 .set_mode = sil_set_mode,
188 .bmdma_setup = sil_bmdma_setup,
189 .bmdma_start = sil_bmdma_start,
190 .bmdma_stop = sil_bmdma_stop,
191 .qc_prep = sil_qc_prep,
192 .freeze = sil_freeze,
193 .thaw = sil_thaw,
194 .scr_read = sil_scr_read,
195 .scr_write = sil_scr_write,
196 };
197
198 static const struct ata_port_info sil_port_info[] = {
199 /* sil_3112 */
200 {
201 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
202 .pio_mask = ATA_PIO4,
203 .mwdma_mask = ATA_MWDMA2,
204 .udma_mask = ATA_UDMA5,
205 .port_ops = &sil_ops,
206 },
207 /* sil_3112_no_sata_irq */
208 {
209 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
210 SIL_FLAG_NO_SATA_IRQ,
211 .pio_mask = ATA_PIO4,
212 .mwdma_mask = ATA_MWDMA2,
213 .udma_mask = ATA_UDMA5,
214 .port_ops = &sil_ops,
215 },
216 /* sil_3512 */
217 {
218 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
219 .pio_mask = ATA_PIO4,
220 .mwdma_mask = ATA_MWDMA2,
221 .udma_mask = ATA_UDMA5,
222 .port_ops = &sil_ops,
223 },
224 /* sil_3114 */
225 {
226 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
227 .pio_mask = ATA_PIO4,
228 .mwdma_mask = ATA_MWDMA2,
229 .udma_mask = ATA_UDMA5,
230 .port_ops = &sil_ops,
231 },
232 };
233
234 /* per-port register offsets */
235 /* TODO: we can probably calculate rather than use a table */
236 static const struct {
237 unsigned long tf; /* ATA taskfile register block */
238 unsigned long ctl; /* ATA control/altstatus register block */
239 unsigned long bmdma; /* DMA register block */
240 unsigned long bmdma2; /* DMA register block #2 */
241 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
242 unsigned long scr; /* SATA control register block */
243 unsigned long sien; /* SATA Interrupt Enable register */
244 unsigned long xfer_mode;/* data transfer mode register */
245 unsigned long sfis_cfg; /* SATA FIS reception config register */
246 } sil_port[] = {
247 /* port 0 ... */
248 /* tf ctl bmdma bmdma2 fifo scr sien mode sfis */
249 { 0x80, 0x8A, 0x0, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
250 { 0xC0, 0xCA, 0x8, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
251 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
252 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
253 /* ... port 3 */
254 };
255
256 MODULE_AUTHOR("Jeff Garzik");
257 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
258 MODULE_LICENSE("GPL");
259 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
260 MODULE_VERSION(DRV_VERSION);
261
262 static int slow_down;
263 module_param(slow_down, int, 0444);
264 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
265
266
267 static void sil_bmdma_stop(struct ata_queued_cmd *qc)
268 {
269 struct ata_port *ap = qc->ap;
270 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
271 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
272
273 /* clear start/stop bit - can safely always write 0 */
274 iowrite8(0, bmdma2);
275
276 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
277 ata_sff_dma_pause(ap);
278 }
279
280 static void sil_bmdma_setup(struct ata_queued_cmd *qc)
281 {
282 struct ata_port *ap = qc->ap;
283 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
284
285 /* load PRD table addr. */
286 iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
287
288 /* issue r/w command */
289 ap->ops->sff_exec_command(ap, &qc->tf);
290 }
291
292 static void sil_bmdma_start(struct ata_queued_cmd *qc)
293 {
294 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
295 struct ata_port *ap = qc->ap;
296 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
297 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
298 u8 dmactl = ATA_DMA_START;
299
300 /* set transfer direction, start host DMA transaction
301 Note: For Large Block Transfer to work, the DMA must be started
302 using the bmdma2 register. */
303 if (!rw)
304 dmactl |= ATA_DMA_WR;
305 iowrite8(dmactl, bmdma2);
306 }
307
308 /* The way God intended PCI IDE scatter/gather lists to look and behave... */
309 static void sil_fill_sg(struct ata_queued_cmd *qc)
310 {
311 struct scatterlist *sg;
312 struct ata_port *ap = qc->ap;
313 struct ata_bmdma_prd *prd, *last_prd = NULL;
314 unsigned int si;
315
316 prd = &ap->bmdma_prd[0];
317 for_each_sg(qc->sg, sg, qc->n_elem, si) {
318 /* Note h/w doesn't support 64-bit, so we unconditionally
319 * truncate dma_addr_t to u32.
320 */
321 u32 addr = (u32) sg_dma_address(sg);
322 u32 sg_len = sg_dma_len(sg);
323
324 prd->addr = cpu_to_le32(addr);
325 prd->flags_len = cpu_to_le32(sg_len);
326 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
327
328 last_prd = prd;
329 prd++;
330 }
331
332 if (likely(last_prd))
333 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
334 }
335
336 static void sil_qc_prep(struct ata_queued_cmd *qc)
337 {
338 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
339 return;
340
341 sil_fill_sg(qc);
342 }
343
344 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
345 {
346 u8 cache_line = 0;
347 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
348 return cache_line;
349 }
350
351 /**
352 * sil_set_mode - wrap set_mode functions
353 * @link: link to set up
354 * @r_failed: returned device when we fail
355 *
356 * Wrap the libata method for device setup as after the setup we need
357 * to inspect the results and do some configuration work
358 */
359
360 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
361 {
362 struct ata_port *ap = link->ap;
363 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
364 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
365 struct ata_device *dev;
366 u32 tmp, dev_mode[2] = { };
367 int rc;
368
369 rc = ata_do_set_mode(link, r_failed);
370 if (rc)
371 return rc;
372
373 ata_for_each_dev(dev, link, ALL) {
374 if (!ata_dev_enabled(dev))
375 dev_mode[dev->devno] = 0; /* PIO0/1/2 */
376 else if (dev->flags & ATA_DFLAG_PIO)
377 dev_mode[dev->devno] = 1; /* PIO3/4 */
378 else
379 dev_mode[dev->devno] = 3; /* UDMA */
380 /* value 2 indicates MDMA */
381 }
382
383 tmp = readl(addr);
384 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
385 tmp |= dev_mode[0];
386 tmp |= (dev_mode[1] << 4);
387 writel(tmp, addr);
388 readl(addr); /* flush */
389 return 0;
390 }
391
392 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
393 unsigned int sc_reg)
394 {
395 void __iomem *offset = ap->ioaddr.scr_addr;
396
397 switch (sc_reg) {
398 case SCR_STATUS:
399 return offset + 4;
400 case SCR_ERROR:
401 return offset + 8;
402 case SCR_CONTROL:
403 return offset;
404 default:
405 /* do nothing */
406 break;
407 }
408
409 return NULL;
410 }
411
412 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
413 {
414 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
415
416 if (mmio) {
417 *val = readl(mmio);
418 return 0;
419 }
420 return -EINVAL;
421 }
422
423 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
424 {
425 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
426
427 if (mmio) {
428 writel(val, mmio);
429 return 0;
430 }
431 return -EINVAL;
432 }
433
434 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
435 {
436 struct ata_eh_info *ehi = &ap->link.eh_info;
437 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
438 u8 status;
439
440 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
441 u32 serror;
442
443 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
444 * controllers continue to assert IRQ as long as
445 * SError bits are pending. Clear SError immediately.
446 */
447 sil_scr_read(&ap->link, SCR_ERROR, &serror);
448 sil_scr_write(&ap->link, SCR_ERROR, serror);
449
450 /* Sometimes spurious interrupts occur, double check
451 * it's PHYRDY CHG.
452 */
453 if (serror & SERR_PHYRDY_CHG) {
454 ap->link.eh_info.serror |= serror;
455 goto freeze;
456 }
457
458 if (!(bmdma2 & SIL_DMA_COMPLETE))
459 return;
460 }
461
462 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
463 /* this sometimes happens, just clear IRQ */
464 ap->ops->sff_check_status(ap);
465 return;
466 }
467
468 /* Check whether we are expecting interrupt in this state */
469 switch (ap->hsm_task_state) {
470 case HSM_ST_FIRST:
471 /* Some pre-ATAPI-4 devices assert INTRQ
472 * at this state when ready to receive CDB.
473 */
474
475 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
476 * The flag was turned on only for atapi devices. No
477 * need to check ata_is_atapi(qc->tf.protocol) again.
478 */
479 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
480 goto err_hsm;
481 break;
482 case HSM_ST_LAST:
483 if (ata_is_dma(qc->tf.protocol)) {
484 /* clear DMA-Start bit */
485 ap->ops->bmdma_stop(qc);
486
487 if (bmdma2 & SIL_DMA_ERROR) {
488 qc->err_mask |= AC_ERR_HOST_BUS;
489 ap->hsm_task_state = HSM_ST_ERR;
490 }
491 }
492 break;
493 case HSM_ST:
494 break;
495 default:
496 goto err_hsm;
497 }
498
499 /* check main status, clearing INTRQ */
500 status = ap->ops->sff_check_status(ap);
501 if (unlikely(status & ATA_BUSY))
502 goto err_hsm;
503
504 /* ack bmdma irq events */
505 ata_bmdma_irq_clear(ap);
506
507 /* kick HSM in the ass */
508 ata_sff_hsm_move(ap, qc, status, 0);
509
510 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
511 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
512
513 return;
514
515 err_hsm:
516 qc->err_mask |= AC_ERR_HSM;
517 freeze:
518 ata_port_freeze(ap);
519 }
520
521 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
522 {
523 struct ata_host *host = dev_instance;
524 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
525 int handled = 0;
526 int i;
527
528 spin_lock(&host->lock);
529
530 for (i = 0; i < host->n_ports; i++) {
531 struct ata_port *ap = host->ports[i];
532 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
533
534 /* turn off SATA_IRQ if not supported */
535 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
536 bmdma2 &= ~SIL_DMA_SATA_IRQ;
537
538 if (bmdma2 == 0xffffffff ||
539 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
540 continue;
541
542 sil_host_intr(ap, bmdma2);
543 handled = 1;
544 }
545
546 spin_unlock(&host->lock);
547
548 return IRQ_RETVAL(handled);
549 }
550
551 static void sil_freeze(struct ata_port *ap)
552 {
553 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
554 u32 tmp;
555
556 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
557 writel(0, mmio_base + sil_port[ap->port_no].sien);
558
559 /* plug IRQ */
560 tmp = readl(mmio_base + SIL_SYSCFG);
561 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
562 writel(tmp, mmio_base + SIL_SYSCFG);
563 readl(mmio_base + SIL_SYSCFG); /* flush */
564
565 /* Ensure DMA_ENABLE is off.
566 *
567 * This is because the controller will not give us access to the
568 * taskfile registers while a DMA is in progress
569 */
570 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
571 ap->ioaddr.bmdma_addr);
572
573 /* According to ata_bmdma_stop, an HDMA transition requires
574 * on PIO cycle. But we can't read a taskfile register.
575 */
576 ioread8(ap->ioaddr.bmdma_addr);
577 }
578
579 static void sil_thaw(struct ata_port *ap)
580 {
581 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
582 u32 tmp;
583
584 /* clear IRQ */
585 ap->ops->sff_check_status(ap);
586 ata_bmdma_irq_clear(ap);
587
588 /* turn on SATA IRQ if supported */
589 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
590 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
591
592 /* turn on IRQ */
593 tmp = readl(mmio_base + SIL_SYSCFG);
594 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
595 writel(tmp, mmio_base + SIL_SYSCFG);
596 }
597
598 /**
599 * sil_dev_config - Apply device/host-specific errata fixups
600 * @dev: Device to be examined
601 *
602 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
603 * device is known to be present, this function is called.
604 * We apply two errata fixups which are specific to Silicon Image,
605 * a Seagate and a Maxtor fixup.
606 *
607 * For certain Seagate devices, we must limit the maximum sectors
608 * to under 8K.
609 *
610 * For certain Maxtor devices, we must not program the drive
611 * beyond udma5.
612 *
613 * Both fixups are unfairly pessimistic. As soon as I get more
614 * information on these errata, I will create a more exhaustive
615 * list, and apply the fixups to only the specific
616 * devices/hosts/firmwares that need it.
617 *
618 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
619 * The Maxtor quirk is in the blacklist, but I'm keeping the original
620 * pessimistic fix for the following reasons...
621 * - There seems to be less info on it, only one device gleaned off the
622 * Windows driver, maybe only one is affected. More info would be greatly
623 * appreciated.
624 * - But then again UDMA5 is hardly anything to complain about
625 */
626 static void sil_dev_config(struct ata_device *dev)
627 {
628 struct ata_port *ap = dev->link->ap;
629 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
630 unsigned int n, quirks = 0;
631 unsigned char model_num[ATA_ID_PROD_LEN + 1];
632
633 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
634
635 for (n = 0; sil_blacklist[n].product; n++)
636 if (!strcmp(sil_blacklist[n].product, model_num)) {
637 quirks = sil_blacklist[n].quirk;
638 break;
639 }
640
641 /* limit requests to 15 sectors */
642 if (slow_down ||
643 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
644 (quirks & SIL_QUIRK_MOD15WRITE))) {
645 if (print_info)
646 ata_dev_printk(dev, KERN_INFO, "applying Seagate "
647 "errata fix (mod15write workaround)\n");
648 dev->max_sectors = 15;
649 return;
650 }
651
652 /* limit to udma5 */
653 if (quirks & SIL_QUIRK_UDMA5MAX) {
654 if (print_info)
655 ata_dev_printk(dev, KERN_INFO, "applying Maxtor "
656 "errata fix %s\n", model_num);
657 dev->udma_mask &= ATA_UDMA5;
658 return;
659 }
660 }
661
662 static void sil_init_controller(struct ata_host *host)
663 {
664 struct pci_dev *pdev = to_pci_dev(host->dev);
665 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
666 u8 cls;
667 u32 tmp;
668 int i;
669
670 /* Initialize FIFO PCI bus arbitration */
671 cls = sil_get_device_cache_line(pdev);
672 if (cls) {
673 cls >>= 3;
674 cls++; /* cls = (line_size/8)+1 */
675 for (i = 0; i < host->n_ports; i++)
676 writew(cls << 8 | cls,
677 mmio_base + sil_port[i].fifo_cfg);
678 } else
679 dev_printk(KERN_WARNING, &pdev->dev,
680 "cache line size not set. Driver may not function\n");
681
682 /* Apply R_ERR on DMA activate FIS errata workaround */
683 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
684 int cnt;
685
686 for (i = 0, cnt = 0; i < host->n_ports; i++) {
687 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
688 if ((tmp & 0x3) != 0x01)
689 continue;
690 if (!cnt)
691 dev_printk(KERN_INFO, &pdev->dev,
692 "Applying R_ERR on DMA activate "
693 "FIS errata fix\n");
694 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
695 cnt++;
696 }
697 }
698
699 if (host->n_ports == 4) {
700 /* flip the magic "make 4 ports work" bit */
701 tmp = readl(mmio_base + sil_port[2].bmdma);
702 if ((tmp & SIL_INTR_STEERING) == 0)
703 writel(tmp | SIL_INTR_STEERING,
704 mmio_base + sil_port[2].bmdma);
705 }
706 }
707
708 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
709 {
710 static const struct dmi_system_id broken_systems[] = {
711 {
712 .ident = "HP Compaq nx6325",
713 .matches = {
714 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
715 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
716 },
717 /* PCI slot number of the controller */
718 .driver_data = (void *)0x12UL,
719 },
720
721 { } /* terminate list */
722 };
723 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
724
725 if (dmi) {
726 unsigned long slot = (unsigned long)dmi->driver_data;
727 /* apply the quirk only to on-board controllers */
728 return slot == PCI_SLOT(pdev->devfn);
729 }
730
731 return false;
732 }
733
734 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
735 {
736 static int printed_version;
737 int board_id = ent->driver_data;
738 struct ata_port_info pi = sil_port_info[board_id];
739 const struct ata_port_info *ppi[] = { &pi, NULL };
740 struct ata_host *host;
741 void __iomem *mmio_base;
742 int n_ports, rc;
743 unsigned int i;
744
745 if (!printed_version++)
746 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
747
748 /* allocate host */
749 n_ports = 2;
750 if (board_id == sil_3114)
751 n_ports = 4;
752
753 if (sil_broken_system_poweroff(pdev)) {
754 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
755 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
756 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
757 "on poweroff and hibernation\n");
758 }
759
760 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
761 if (!host)
762 return -ENOMEM;
763
764 /* acquire resources and fill host */
765 rc = pcim_enable_device(pdev);
766 if (rc)
767 return rc;
768
769 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
770 if (rc == -EBUSY)
771 pcim_pin_device(pdev);
772 if (rc)
773 return rc;
774 host->iomap = pcim_iomap_table(pdev);
775
776 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
777 if (rc)
778 return rc;
779 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
780 if (rc)
781 return rc;
782
783 mmio_base = host->iomap[SIL_MMIO_BAR];
784
785 for (i = 0; i < host->n_ports; i++) {
786 struct ata_port *ap = host->ports[i];
787 struct ata_ioports *ioaddr = &ap->ioaddr;
788
789 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
790 ioaddr->altstatus_addr =
791 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
792 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
793 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
794 ata_sff_std_ports(ioaddr);
795
796 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
797 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
798 }
799
800 /* initialize and activate */
801 sil_init_controller(host);
802
803 pci_set_master(pdev);
804 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
805 &sil_sht);
806 }
807
808 #ifdef CONFIG_PM
809 static int sil_pci_device_resume(struct pci_dev *pdev)
810 {
811 struct ata_host *host = dev_get_drvdata(&pdev->dev);
812 int rc;
813
814 rc = ata_pci_device_do_resume(pdev);
815 if (rc)
816 return rc;
817
818 sil_init_controller(host);
819 ata_host_resume(host);
820
821 return 0;
822 }
823 #endif
824
825 static int __init sil_init(void)
826 {
827 return pci_register_driver(&sil_pci_driver);
828 }
829
830 static void __exit sil_exit(void)
831 {
832 pci_unregister_driver(&sil_pci_driver);
833 }
834
835
836 module_init(sil_init);
837 module_exit(sil_exit);
Linux with added FPC-III support