1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sata_sil.c - Silicon Image SATA
4 *
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
7 * on emails.
8 *
9 * Copyright 2003-2005 Red Hat, Inc.
10 * Copyright 2003 Benjamin Herrenschmidt
11 *
12 * libata documentation is available via 'make {ps|pdf}docs',
13 * as Documentation/driver-api/libata.rst
14 *
15 * Documentation for SiI 3112:
16 * http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
17 *
18 * Other errata and documentation available under NDA.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/pci.h>
24 #include <linux/blkdev.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/device.h>
28 #include <scsi/scsi_host.h>
29 #include <linux/libata.h>
30 #include <linux/dmi.h>
31
32 #define DRV_NAME "sata_sil"
33 #define DRV_VERSION "2.4"
34
35 #define SIL_DMA_BOUNDARY 0x7fffffffUL
36
37 enum {
38 SIL_MMIO_BAR = 5,
39
40 /*
41 * host flags
42 */
43 SIL_FLAG_NO_SATA_IRQ = (1 << 28),
44 SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
45 SIL_FLAG_MOD15WRITE = (1 << 30),
46
47 SIL_DFL_PORT_FLAGS = ATA_FLAG_SATA,
48
49 /*
50 * Controller IDs
51 */
52 sil_3112 = 0,
53 sil_3112_no_sata_irq = 1,
54 sil_3512 = 2,
55 sil_3114 = 3,
56
57 /*
58 * Register offsets
59 */
60 SIL_SYSCFG = 0x48,
61
62 /*
63 * Register bits
64 */
65 /* SYSCFG */
66 SIL_MASK_IDE0_INT = (1 << 22),
67 SIL_MASK_IDE1_INT = (1 << 23),
68 SIL_MASK_IDE2_INT = (1 << 24),
69 SIL_MASK_IDE3_INT = (1 << 25),
70 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
71 SIL_MASK_4PORT = SIL_MASK_2PORT |
72 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
73
74 /* BMDMA/BMDMA2 */
75 SIL_INTR_STEERING = (1 << 1),
76
77 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */
78 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */
79 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */
80 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */
81 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */
82 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */
83 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */
84 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */
85 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */
86 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */
87
88 /* SIEN */
89 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */
90
91 /*
92 * Others
93 */
94 SIL_QUIRK_MOD15WRITE = (1 << 0),
95 SIL_QUIRK_UDMA5MAX = (1 << 1),
96 };
97
98 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
99 #ifdef CONFIG_PM_SLEEP
100 static int sil_pci_device_resume(struct pci_dev *pdev);
101 #endif
102 static void sil_dev_config(struct ata_device *dev);
103 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
104 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
105 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
106 static enum ata_completion_errors sil_qc_prep(struct ata_queued_cmd *qc);
107 static void sil_bmdma_setup(struct ata_queued_cmd *qc);
108 static void sil_bmdma_start(struct ata_queued_cmd *qc);
109 static void sil_bmdma_stop(struct ata_queued_cmd *qc);
110 static void sil_freeze(struct ata_port *ap);
111 static void sil_thaw(struct ata_port *ap);
112
113
114 static const struct pci_device_id sil_pci_tbl[] = {
115 { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
116 { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
117 { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
118 { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
119 { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
120 { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
121 { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
122
123 { } /* terminate list */
124 };
125
126
127 /* TODO firmware versions should be added - eric */
128 static const struct sil_drivelist {
129 const char *product;
130 unsigned int quirk;
131 } sil_blacklist [] = {
132 { "ST320012AS", SIL_QUIRK_MOD15WRITE },
133 { "ST330013AS", SIL_QUIRK_MOD15WRITE },
134 { "ST340017AS", SIL_QUIRK_MOD15WRITE },
135 { "ST360015AS", SIL_QUIRK_MOD15WRITE },
136 { "ST380023AS", SIL_QUIRK_MOD15WRITE },
137 { "ST3120023AS", SIL_QUIRK_MOD15WRITE },
138 { "ST340014ASL", SIL_QUIRK_MOD15WRITE },
139 { "ST360014ASL", SIL_QUIRK_MOD15WRITE },
140 { "ST380011ASL", SIL_QUIRK_MOD15WRITE },
141 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
142 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
143 { "TOSHIBA MK2561GSYN", SIL_QUIRK_MOD15WRITE },
144 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
145 { }
146 };
147
148 static struct pci_driver sil_pci_driver = {
149 .name = DRV_NAME,
150 .id_table = sil_pci_tbl,
151 .probe = sil_init_one,
152 .remove = ata_pci_remove_one,
153 #ifdef CONFIG_PM_SLEEP
154 .suspend = ata_pci_device_suspend,
155 .resume = sil_pci_device_resume,
156 #endif
157 };
158
159 static const struct scsi_host_template sil_sht = {
160 ATA_BASE_SHT(DRV_NAME),
161 /** These controllers support Large Block Transfer which allows
162 transfer chunks up to 2GB and which cross 64KB boundaries,
163 therefore the DMA limits are more relaxed than standard ATA SFF. */
164 .dma_boundary = SIL_DMA_BOUNDARY,
165 .sg_tablesize = ATA_MAX_PRD
166 };
167
168 static struct ata_port_operations sil_ops = {
169 .inherits = &ata_bmdma32_port_ops,
170 .dev_config = sil_dev_config,
171 .set_mode = sil_set_mode,
172 .bmdma_setup = sil_bmdma_setup,
173 .bmdma_start = sil_bmdma_start,
174 .bmdma_stop = sil_bmdma_stop,
175 .qc_prep = sil_qc_prep,
176 .freeze = sil_freeze,
177 .thaw = sil_thaw,
178 .scr_read = sil_scr_read,
179 .scr_write = sil_scr_write,
180 };
181
182 static const struct ata_port_info sil_port_info[] = {
183 /* sil_3112 */
184 {
185 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
186 .pio_mask = ATA_PIO4,
187 .mwdma_mask = ATA_MWDMA2,
188 .udma_mask = ATA_UDMA5,
189 .port_ops = &sil_ops,
190 },
191 /* sil_3112_no_sata_irq */
192 {
193 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
194 SIL_FLAG_NO_SATA_IRQ,
195 .pio_mask = ATA_PIO4,
196 .mwdma_mask = ATA_MWDMA2,
197 .udma_mask = ATA_UDMA5,
198 .port_ops = &sil_ops,
199 },
200 /* sil_3512 */
201 {
202 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
203 .pio_mask = ATA_PIO4,
204 .mwdma_mask = ATA_MWDMA2,
205 .udma_mask = ATA_UDMA5,
206 .port_ops = &sil_ops,
207 },
208 /* sil_3114 */
209 {
210 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
211 .pio_mask = ATA_PIO4,
212 .mwdma_mask = ATA_MWDMA2,
213 .udma_mask = ATA_UDMA5,
214 .port_ops = &sil_ops,
215 },
216 };
217
218 /* per-port register offsets */
219 /* TODO: we can probably calculate rather than use a table */
220 static const struct {
221 unsigned long tf; /* ATA taskfile register block */
222 unsigned long ctl; /* ATA control/altstatus register block */
223 unsigned long bmdma; /* DMA register block */
224 unsigned long bmdma2; /* DMA register block #2 */
225 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
226 unsigned long scr; /* SATA control register block */
227 unsigned long sien; /* SATA Interrupt Enable register */
228 unsigned long xfer_mode;/* data transfer mode register */
229 unsigned long sfis_cfg; /* SATA FIS reception config register */
230 } sil_port[] = {
231 /* port 0 ... */
232 /* tf ctl bmdma bmdma2 fifo scr sien mode sfis */
233 { 0x80, 0x8A, 0x0, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
234 { 0xC0, 0xCA, 0x8, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
235 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
236 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
237 /* ... port 3 */
238 };
239
240 MODULE_AUTHOR("Jeff Garzik");
241 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
242 MODULE_LICENSE("GPL");
243 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
244 MODULE_VERSION(DRV_VERSION);
245
246 static int slow_down;
247 module_param(slow_down, int, 0444);
248 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
249
250
sil_bmdma_stop(struct ata_queued_cmd * qc)251 static void sil_bmdma_stop(struct ata_queued_cmd *qc)
252 {
253 struct ata_port *ap = qc->ap;
254 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
255 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
256
257 /* clear start/stop bit - can safely always write 0 */
258 iowrite8(0, bmdma2);
259
260 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
261 ata_sff_dma_pause(ap);
262 }
263
sil_bmdma_setup(struct ata_queued_cmd * qc)264 static void sil_bmdma_setup(struct ata_queued_cmd *qc)
265 {
266 struct ata_port *ap = qc->ap;
267 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
268
269 /* load PRD table addr. */
270 iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
271
272 /* issue r/w command */
273 ap->ops->sff_exec_command(ap, &qc->tf);
274 }
275
sil_bmdma_start(struct ata_queued_cmd * qc)276 static void sil_bmdma_start(struct ata_queued_cmd *qc)
277 {
278 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
279 struct ata_port *ap = qc->ap;
280 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
281 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
282 u8 dmactl = ATA_DMA_START;
283
284 /* set transfer direction, start host DMA transaction
285 Note: For Large Block Transfer to work, the DMA must be started
286 using the bmdma2 register. */
287 if (!rw)
288 dmactl |= ATA_DMA_WR;
289 iowrite8(dmactl, bmdma2);
290 }
291
292 /* The way God intended PCI IDE scatter/gather lists to look and behave... */
sil_fill_sg(struct ata_queued_cmd * qc)293 static void sil_fill_sg(struct ata_queued_cmd *qc)
294 {
295 struct scatterlist *sg;
296 struct ata_port *ap = qc->ap;
297 struct ata_bmdma_prd *prd, *last_prd = NULL;
298 unsigned int si;
299
300 prd = &ap->bmdma_prd[0];
301 for_each_sg(qc->sg, sg, qc->n_elem, si) {
302 /* Note h/w doesn't support 64-bit, so we unconditionally
303 * truncate dma_addr_t to u32.
304 */
305 u32 addr = (u32) sg_dma_address(sg);
306 u32 sg_len = sg_dma_len(sg);
307
308 prd->addr = cpu_to_le32(addr);
309 prd->flags_len = cpu_to_le32(sg_len);
310
311 last_prd = prd;
312 prd++;
313 }
314
315 if (likely(last_prd))
316 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
317 }
318
sil_qc_prep(struct ata_queued_cmd * qc)319 static enum ata_completion_errors sil_qc_prep(struct ata_queued_cmd *qc)
320 {
321 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
322 return AC_ERR_OK;
323
324 sil_fill_sg(qc);
325
326 return AC_ERR_OK;
327 }
328
sil_get_device_cache_line(struct pci_dev * pdev)329 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
330 {
331 u8 cache_line = 0;
332 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
333 return cache_line;
334 }
335
336 /**
337 * sil_set_mode - wrap set_mode functions
338 * @link: link to set up
339 * @r_failed: returned device when we fail
340 *
341 * Wrap the libata method for device setup as after the setup we need
342 * to inspect the results and do some configuration work
343 */
344
sil_set_mode(struct ata_link * link,struct ata_device ** r_failed)345 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
346 {
347 struct ata_port *ap = link->ap;
348 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
349 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
350 struct ata_device *dev;
351 u32 tmp, dev_mode[2] = { };
352 int rc;
353
354 rc = ata_do_set_mode(link, r_failed);
355 if (rc)
356 return rc;
357
358 ata_for_each_dev(dev, link, ALL) {
359 if (!ata_dev_enabled(dev))
360 dev_mode[dev->devno] = 0; /* PIO0/1/2 */
361 else if (dev->flags & ATA_DFLAG_PIO)
362 dev_mode[dev->devno] = 1; /* PIO3/4 */
363 else
364 dev_mode[dev->devno] = 3; /* UDMA */
365 /* value 2 indicates MDMA */
366 }
367
368 tmp = readl(addr);
369 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
370 tmp |= dev_mode[0];
371 tmp |= (dev_mode[1] << 4);
372 writel(tmp, addr);
373 readl(addr); /* flush */
374 return 0;
375 }
376
sil_scr_addr(struct ata_port * ap,unsigned int sc_reg)377 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
378 unsigned int sc_reg)
379 {
380 void __iomem *offset = ap->ioaddr.scr_addr;
381
382 switch (sc_reg) {
383 case SCR_STATUS:
384 return offset + 4;
385 case SCR_ERROR:
386 return offset + 8;
387 case SCR_CONTROL:
388 return offset;
389 default:
390 /* do nothing */
391 break;
392 }
393
394 return NULL;
395 }
396
sil_scr_read(struct ata_link * link,unsigned int sc_reg,u32 * val)397 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
398 {
399 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
400
401 if (mmio) {
402 *val = readl(mmio);
403 return 0;
404 }
405 return -EINVAL;
406 }
407
sil_scr_write(struct ata_link * link,unsigned int sc_reg,u32 val)408 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
409 {
410 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
411
412 if (mmio) {
413 writel(val, mmio);
414 return 0;
415 }
416 return -EINVAL;
417 }
418
sil_host_intr(struct ata_port * ap,u32 bmdma2)419 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
420 {
421 struct ata_eh_info *ehi = &ap->link.eh_info;
422 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
423 u8 status;
424
425 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
426 u32 serror = 0xffffffff;
427
428 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
429 * controllers continue to assert IRQ as long as
430 * SError bits are pending. Clear SError immediately.
431 */
432 sil_scr_read(&ap->link, SCR_ERROR, &serror);
433 sil_scr_write(&ap->link, SCR_ERROR, serror);
434
435 /* Sometimes spurious interrupts occur, double check
436 * it's PHYRDY CHG.
437 */
438 if (serror & SERR_PHYRDY_CHG) {
439 ap->link.eh_info.serror |= serror;
440 goto freeze;
441 }
442
443 if (!(bmdma2 & SIL_DMA_COMPLETE))
444 return;
445 }
446
447 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
448 /* this sometimes happens, just clear IRQ */
449 ap->ops->sff_check_status(ap);
450 return;
451 }
452
453 /* Check whether we are expecting interrupt in this state */
454 switch (ap->hsm_task_state) {
455 case HSM_ST_FIRST:
456 /* Some pre-ATAPI-4 devices assert INTRQ
457 * at this state when ready to receive CDB.
458 */
459
460 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
461 * The flag was turned on only for atapi devices. No
462 * need to check ata_is_atapi(qc->tf.protocol) again.
463 */
464 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
465 goto err_hsm;
466 break;
467 case HSM_ST_LAST:
468 if (ata_is_dma(qc->tf.protocol)) {
469 /* clear DMA-Start bit */
470 ap->ops->bmdma_stop(qc);
471
472 if (bmdma2 & SIL_DMA_ERROR) {
473 qc->err_mask |= AC_ERR_HOST_BUS;
474 ap->hsm_task_state = HSM_ST_ERR;
475 }
476 }
477 break;
478 case HSM_ST:
479 break;
480 default:
481 goto err_hsm;
482 }
483
484 /* check main status, clearing INTRQ */
485 status = ap->ops->sff_check_status(ap);
486 if (unlikely(status & ATA_BUSY))
487 goto err_hsm;
488
489 /* ack bmdma irq events */
490 ata_bmdma_irq_clear(ap);
491
492 /* kick HSM in the ass */
493 ata_sff_hsm_move(ap, qc, status, 0);
494
495 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
496 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
497
498 return;
499
500 err_hsm:
501 qc->err_mask |= AC_ERR_HSM;
502 freeze:
503 ata_port_freeze(ap);
504 }
505
sil_interrupt(int irq,void * dev_instance)506 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
507 {
508 struct ata_host *host = dev_instance;
509 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
510 int handled = 0;
511 int i;
512
513 spin_lock(&host->lock);
514
515 for (i = 0; i < host->n_ports; i++) {
516 struct ata_port *ap = host->ports[i];
517 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
518
519 /* turn off SATA_IRQ if not supported */
520 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
521 bmdma2 &= ~SIL_DMA_SATA_IRQ;
522
523 if (bmdma2 == 0xffffffff ||
524 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
525 continue;
526
527 sil_host_intr(ap, bmdma2);
528 handled = 1;
529 }
530
531 spin_unlock(&host->lock);
532
533 return IRQ_RETVAL(handled);
534 }
535
sil_freeze(struct ata_port * ap)536 static void sil_freeze(struct ata_port *ap)
537 {
538 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
539 u32 tmp;
540
541 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
542 writel(0, mmio_base + sil_port[ap->port_no].sien);
543
544 /* plug IRQ */
545 tmp = readl(mmio_base + SIL_SYSCFG);
546 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
547 writel(tmp, mmio_base + SIL_SYSCFG);
548 readl(mmio_base + SIL_SYSCFG); /* flush */
549
550 /* Ensure DMA_ENABLE is off.
551 *
552 * This is because the controller will not give us access to the
553 * taskfile registers while a DMA is in progress
554 */
555 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
556 ap->ioaddr.bmdma_addr);
557
558 /* According to ata_bmdma_stop, an HDMA transition requires
559 * on PIO cycle. But we can't read a taskfile register.
560 */
561 ioread8(ap->ioaddr.bmdma_addr);
562 }
563
sil_thaw(struct ata_port * ap)564 static void sil_thaw(struct ata_port *ap)
565 {
566 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
567 u32 tmp;
568
569 /* clear IRQ */
570 ap->ops->sff_check_status(ap);
571 ata_bmdma_irq_clear(ap);
572
573 /* turn on SATA IRQ if supported */
574 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
575 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
576
577 /* turn on IRQ */
578 tmp = readl(mmio_base + SIL_SYSCFG);
579 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
580 writel(tmp, mmio_base + SIL_SYSCFG);
581 }
582
583 /**
584 * sil_dev_config - Apply device/host-specific errata fixups
585 * @dev: Device to be examined
586 *
587 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
588 * device is known to be present, this function is called.
589 * We apply two errata fixups which are specific to Silicon Image,
590 * a Seagate and a Maxtor fixup.
591 *
592 * For certain Seagate devices, we must limit the maximum sectors
593 * to under 8K.
594 *
595 * For certain Maxtor devices, we must not program the drive
596 * beyond udma5.
597 *
598 * Both fixups are unfairly pessimistic. As soon as I get more
599 * information on these errata, I will create a more exhaustive
600 * list, and apply the fixups to only the specific
601 * devices/hosts/firmwares that need it.
602 *
603 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
604 * The Maxtor quirk is in the blacklist, but I'm keeping the original
605 * pessimistic fix for the following reasons...
606 * - There seems to be less info on it, only one device gleaned off the
607 * Windows driver, maybe only one is affected. More info would be greatly
608 * appreciated.
609 * - But then again UDMA5 is hardly anything to complain about
610 */
sil_dev_config(struct ata_device * dev)611 static void sil_dev_config(struct ata_device *dev)
612 {
613 struct ata_port *ap = dev->link->ap;
614 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
615 unsigned int n, quirks = 0;
616 unsigned char model_num[ATA_ID_PROD_LEN + 1];
617
618 /* This controller doesn't support trim */
619 dev->horkage |= ATA_HORKAGE_NOTRIM;
620
621 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
622
623 for (n = 0; sil_blacklist[n].product; n++)
624 if (!strcmp(sil_blacklist[n].product, model_num)) {
625 quirks = sil_blacklist[n].quirk;
626 break;
627 }
628
629 /* limit requests to 15 sectors */
630 if (slow_down ||
631 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
632 (quirks & SIL_QUIRK_MOD15WRITE))) {
633 if (print_info)
634 ata_dev_info(dev,
635 "applying Seagate errata fix (mod15write workaround)\n");
636 dev->max_sectors = 15;
637 return;
638 }
639
640 /* limit to udma5 */
641 if (quirks & SIL_QUIRK_UDMA5MAX) {
642 if (print_info)
643 ata_dev_info(dev, "applying Maxtor errata fix %s\n",
644 model_num);
645 dev->udma_mask &= ATA_UDMA5;
646 return;
647 }
648 }
649
sil_init_controller(struct ata_host * host)650 static void sil_init_controller(struct ata_host *host)
651 {
652 struct pci_dev *pdev = to_pci_dev(host->dev);
653 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
654 u8 cls;
655 u32 tmp;
656 int i;
657
658 /* Initialize FIFO PCI bus arbitration */
659 cls = sil_get_device_cache_line(pdev);
660 if (cls) {
661 cls >>= 3;
662 cls++; /* cls = (line_size/8)+1 */
663 for (i = 0; i < host->n_ports; i++)
664 writew(cls << 8 | cls,
665 mmio_base + sil_port[i].fifo_cfg);
666 } else
667 dev_warn(&pdev->dev,
668 "cache line size not set. Driver may not function\n");
669
670 /* Apply R_ERR on DMA activate FIS errata workaround */
671 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
672 int cnt;
673
674 for (i = 0, cnt = 0; i < host->n_ports; i++) {
675 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
676 if ((tmp & 0x3) != 0x01)
677 continue;
678 if (!cnt)
679 dev_info(&pdev->dev,
680 "Applying R_ERR on DMA activate FIS errata fix\n");
681 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
682 cnt++;
683 }
684 }
685
686 if (host->n_ports == 4) {
687 /* flip the magic "make 4 ports work" bit */
688 tmp = readl(mmio_base + sil_port[2].bmdma);
689 if ((tmp & SIL_INTR_STEERING) == 0)
690 writel(tmp | SIL_INTR_STEERING,
691 mmio_base + sil_port[2].bmdma);
692 }
693 }
694
sil_broken_system_poweroff(struct pci_dev * pdev)695 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
696 {
697 static const struct dmi_system_id broken_systems[] = {
698 {
699 .ident = "HP Compaq nx6325",
700 .matches = {
701 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
702 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
703 },
704 /* PCI slot number of the controller */
705 .driver_data = (void *)0x12UL,
706 },
707
708 { } /* terminate list */
709 };
710 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
711
712 if (dmi) {
713 unsigned long slot = (unsigned long)dmi->driver_data;
714 /* apply the quirk only to on-board controllers */
715 return slot == PCI_SLOT(pdev->devfn);
716 }
717
718 return false;
719 }
720
sil_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)721 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
722 {
723 int board_id = ent->driver_data;
724 struct ata_port_info pi = sil_port_info[board_id];
725 const struct ata_port_info *ppi[] = { &pi, NULL };
726 struct ata_host *host;
727 void __iomem *mmio_base;
728 int n_ports, rc;
729 unsigned int i;
730
731 ata_print_version_once(&pdev->dev, DRV_VERSION);
732
733 /* allocate host */
734 n_ports = 2;
735 if (board_id == sil_3114)
736 n_ports = 4;
737
738 if (sil_broken_system_poweroff(pdev)) {
739 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
740 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
741 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
742 "on poweroff and hibernation\n");
743 }
744
745 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
746 if (!host)
747 return -ENOMEM;
748
749 /* acquire resources and fill host */
750 rc = pcim_enable_device(pdev);
751 if (rc)
752 return rc;
753
754 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
755 if (rc == -EBUSY)
756 pcim_pin_device(pdev);
757 if (rc)
758 return rc;
759 host->iomap = pcim_iomap_table(pdev);
760
761 rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
762 if (rc)
763 return rc;
764
765 mmio_base = host->iomap[SIL_MMIO_BAR];
766
767 for (i = 0; i < host->n_ports; i++) {
768 struct ata_port *ap = host->ports[i];
769 struct ata_ioports *ioaddr = &ap->ioaddr;
770
771 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
772 ioaddr->altstatus_addr =
773 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
774 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
775 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
776 ata_sff_std_ports(ioaddr);
777
778 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
779 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
780 }
781
782 /* initialize and activate */
783 sil_init_controller(host);
784
785 pci_set_master(pdev);
786 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
787 &sil_sht);
788 }
789
790 #ifdef CONFIG_PM_SLEEP
sil_pci_device_resume(struct pci_dev * pdev)791 static int sil_pci_device_resume(struct pci_dev *pdev)
792 {
793 struct ata_host *host = pci_get_drvdata(pdev);
794 int rc;
795
796 rc = ata_pci_device_do_resume(pdev);
797 if (rc)
798 return rc;
799
800 sil_init_controller(host);
801 ata_host_resume(host);
802
803 return 0;
804 }
805 #endif
806
807 module_pci_driver(sil_pci_driver);
808