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 void 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 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 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
311
312 last_prd = prd;
313 prd++;
314 }
315
316 if (likely(last_prd))
317 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
318 }
319
sil_qc_prep(struct ata_queued_cmd * qc)320 static void sil_qc_prep(struct ata_queued_cmd *qc)
321 {
322 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
323 return;
324
325 sil_fill_sg(qc);
326 }
327
sil_get_device_cache_line(struct pci_dev * pdev)328 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
329 {
330 u8 cache_line = 0;
331 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
332 return cache_line;
333 }
334
335 /**
336 * sil_set_mode - wrap set_mode functions
337 * @link: link to set up
338 * @r_failed: returned device when we fail
339 *
340 * Wrap the libata method for device setup as after the setup we need
341 * to inspect the results and do some configuration work
342 */
343
sil_set_mode(struct ata_link * link,struct ata_device ** r_failed)344 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
345 {
346 struct ata_port *ap = link->ap;
347 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
348 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
349 struct ata_device *dev;
350 u32 tmp, dev_mode[2] = { };
351 int rc;
352
353 rc = ata_do_set_mode(link, r_failed);
354 if (rc)
355 return rc;
356
357 ata_for_each_dev(dev, link, ALL) {
358 if (!ata_dev_enabled(dev))
359 dev_mode[dev->devno] = 0; /* PIO0/1/2 */
360 else if (dev->flags & ATA_DFLAG_PIO)
361 dev_mode[dev->devno] = 1; /* PIO3/4 */
362 else
363 dev_mode[dev->devno] = 3; /* UDMA */
364 /* value 2 indicates MDMA */
365 }
366
367 tmp = readl(addr);
368 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
369 tmp |= dev_mode[0];
370 tmp |= (dev_mode[1] << 4);
371 writel(tmp, addr);
372 readl(addr); /* flush */
373 return 0;
374 }
375
sil_scr_addr(struct ata_port * ap,unsigned int sc_reg)376 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
377 unsigned int sc_reg)
378 {
379 void __iomem *offset = ap->ioaddr.scr_addr;
380
381 switch (sc_reg) {
382 case SCR_STATUS:
383 return offset + 4;
384 case SCR_ERROR:
385 return offset + 8;
386 case SCR_CONTROL:
387 return offset;
388 default:
389 /* do nothing */
390 break;
391 }
392
393 return NULL;
394 }
395
sil_scr_read(struct ata_link * link,unsigned int sc_reg,u32 * val)396 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
397 {
398 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
399
400 if (mmio) {
401 *val = readl(mmio);
402 return 0;
403 }
404 return -EINVAL;
405 }
406
sil_scr_write(struct ata_link * link,unsigned int sc_reg,u32 val)407 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
408 {
409 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
410
411 if (mmio) {
412 writel(val, mmio);
413 return 0;
414 }
415 return -EINVAL;
416 }
417
sil_host_intr(struct ata_port * ap,u32 bmdma2)418 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
419 {
420 struct ata_eh_info *ehi = &ap->link.eh_info;
421 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
422 u8 status;
423
424 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
425 u32 serror = 0xffffffff;
426
427 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
428 * controllers continue to assert IRQ as long as
429 * SError bits are pending. Clear SError immediately.
430 */
431 sil_scr_read(&ap->link, SCR_ERROR, &serror);
432 sil_scr_write(&ap->link, SCR_ERROR, serror);
433
434 /* Sometimes spurious interrupts occur, double check
435 * it's PHYRDY CHG.
436 */
437 if (serror & SERR_PHYRDY_CHG) {
438 ap->link.eh_info.serror |= serror;
439 goto freeze;
440 }
441
442 if (!(bmdma2 & SIL_DMA_COMPLETE))
443 return;
444 }
445
446 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
447 /* this sometimes happens, just clear IRQ */
448 ap->ops->sff_check_status(ap);
449 return;
450 }
451
452 /* Check whether we are expecting interrupt in this state */
453 switch (ap->hsm_task_state) {
454 case HSM_ST_FIRST:
455 /* Some pre-ATAPI-4 devices assert INTRQ
456 * at this state when ready to receive CDB.
457 */
458
459 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
460 * The flag was turned on only for atapi devices. No
461 * need to check ata_is_atapi(qc->tf.protocol) again.
462 */
463 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
464 goto err_hsm;
465 break;
466 case HSM_ST_LAST:
467 if (ata_is_dma(qc->tf.protocol)) {
468 /* clear DMA-Start bit */
469 ap->ops->bmdma_stop(qc);
470
471 if (bmdma2 & SIL_DMA_ERROR) {
472 qc->err_mask |= AC_ERR_HOST_BUS;
473 ap->hsm_task_state = HSM_ST_ERR;
474 }
475 }
476 break;
477 case HSM_ST:
478 break;
479 default:
480 goto err_hsm;
481 }
482
483 /* check main status, clearing INTRQ */
484 status = ap->ops->sff_check_status(ap);
485 if (unlikely(status & ATA_BUSY))
486 goto err_hsm;
487
488 /* ack bmdma irq events */
489 ata_bmdma_irq_clear(ap);
490
491 /* kick HSM in the ass */
492 ata_sff_hsm_move(ap, qc, status, 0);
493
494 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
495 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
496
497 return;
498
499 err_hsm:
500 qc->err_mask |= AC_ERR_HSM;
501 freeze:
502 ata_port_freeze(ap);
503 }
504
sil_interrupt(int irq,void * dev_instance)505 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
506 {
507 struct ata_host *host = dev_instance;
508 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
509 int handled = 0;
510 int i;
511
512 spin_lock(&host->lock);
513
514 for (i = 0; i < host->n_ports; i++) {
515 struct ata_port *ap = host->ports[i];
516 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
517
518 /* turn off SATA_IRQ if not supported */
519 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
520 bmdma2 &= ~SIL_DMA_SATA_IRQ;
521
522 if (bmdma2 == 0xffffffff ||
523 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
524 continue;
525
526 sil_host_intr(ap, bmdma2);
527 handled = 1;
528 }
529
530 spin_unlock(&host->lock);
531
532 return IRQ_RETVAL(handled);
533 }
534
sil_freeze(struct ata_port * ap)535 static void sil_freeze(struct ata_port *ap)
536 {
537 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
538 u32 tmp;
539
540 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
541 writel(0, mmio_base + sil_port[ap->port_no].sien);
542
543 /* plug IRQ */
544 tmp = readl(mmio_base + SIL_SYSCFG);
545 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
546 writel(tmp, mmio_base + SIL_SYSCFG);
547 readl(mmio_base + SIL_SYSCFG); /* flush */
548
549 /* Ensure DMA_ENABLE is off.
550 *
551 * This is because the controller will not give us access to the
552 * taskfile registers while a DMA is in progress
553 */
554 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
555 ap->ioaddr.bmdma_addr);
556
557 /* According to ata_bmdma_stop, an HDMA transition requires
558 * on PIO cycle. But we can't read a taskfile register.
559 */
560 ioread8(ap->ioaddr.bmdma_addr);
561 }
562
sil_thaw(struct ata_port * ap)563 static void sil_thaw(struct ata_port *ap)
564 {
565 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
566 u32 tmp;
567
568 /* clear IRQ */
569 ap->ops->sff_check_status(ap);
570 ata_bmdma_irq_clear(ap);
571
572 /* turn on SATA IRQ if supported */
573 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
574 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
575
576 /* turn on IRQ */
577 tmp = readl(mmio_base + SIL_SYSCFG);
578 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
579 writel(tmp, mmio_base + SIL_SYSCFG);
580 }
581
582 /**
583 * sil_dev_config - Apply device/host-specific errata fixups
584 * @dev: Device to be examined
585 *
586 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
587 * device is known to be present, this function is called.
588 * We apply two errata fixups which are specific to Silicon Image,
589 * a Seagate and a Maxtor fixup.
590 *
591 * For certain Seagate devices, we must limit the maximum sectors
592 * to under 8K.
593 *
594 * For certain Maxtor devices, we must not program the drive
595 * beyond udma5.
596 *
597 * Both fixups are unfairly pessimistic. As soon as I get more
598 * information on these errata, I will create a more exhaustive
599 * list, and apply the fixups to only the specific
600 * devices/hosts/firmwares that need it.
601 *
602 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
603 * The Maxtor quirk is in the blacklist, but I'm keeping the original
604 * pessimistic fix for the following reasons...
605 * - There seems to be less info on it, only one device gleaned off the
606 * Windows driver, maybe only one is affected. More info would be greatly
607 * appreciated.
608 * - But then again UDMA5 is hardly anything to complain about
609 */
sil_dev_config(struct ata_device * dev)610 static void sil_dev_config(struct ata_device *dev)
611 {
612 struct ata_port *ap = dev->link->ap;
613 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
614 unsigned int n, quirks = 0;
615 unsigned char model_num[ATA_ID_PROD_LEN + 1];
616
617 /* This controller doesn't support trim */
618 dev->horkage |= ATA_HORKAGE_NOTRIM;
619
620 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
621
622 for (n = 0; sil_blacklist[n].product; n++)
623 if (!strcmp(sil_blacklist[n].product, model_num)) {
624 quirks = sil_blacklist[n].quirk;
625 break;
626 }
627
628 /* limit requests to 15 sectors */
629 if (slow_down ||
630 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
631 (quirks & SIL_QUIRK_MOD15WRITE))) {
632 if (print_info)
633 ata_dev_info(dev,
634 "applying Seagate errata fix (mod15write workaround)\n");
635 dev->max_sectors = 15;
636 return;
637 }
638
639 /* limit to udma5 */
640 if (quirks & SIL_QUIRK_UDMA5MAX) {
641 if (print_info)
642 ata_dev_info(dev, "applying Maxtor errata fix %s\n",
643 model_num);
644 dev->udma_mask &= ATA_UDMA5;
645 return;
646 }
647 }
648
sil_init_controller(struct ata_host * host)649 static void sil_init_controller(struct ata_host *host)
650 {
651 struct pci_dev *pdev = to_pci_dev(host->dev);
652 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
653 u8 cls;
654 u32 tmp;
655 int i;
656
657 /* Initialize FIFO PCI bus arbitration */
658 cls = sil_get_device_cache_line(pdev);
659 if (cls) {
660 cls >>= 3;
661 cls++; /* cls = (line_size/8)+1 */
662 for (i = 0; i < host->n_ports; i++)
663 writew(cls << 8 | cls,
664 mmio_base + sil_port[i].fifo_cfg);
665 } else
666 dev_warn(&pdev->dev,
667 "cache line size not set. Driver may not function\n");
668
669 /* Apply R_ERR on DMA activate FIS errata workaround */
670 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
671 int cnt;
672
673 for (i = 0, cnt = 0; i < host->n_ports; i++) {
674 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
675 if ((tmp & 0x3) != 0x01)
676 continue;
677 if (!cnt)
678 dev_info(&pdev->dev,
679 "Applying R_ERR on DMA activate FIS errata fix\n");
680 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
681 cnt++;
682 }
683 }
684
685 if (host->n_ports == 4) {
686 /* flip the magic "make 4 ports work" bit */
687 tmp = readl(mmio_base + sil_port[2].bmdma);
688 if ((tmp & SIL_INTR_STEERING) == 0)
689 writel(tmp | SIL_INTR_STEERING,
690 mmio_base + sil_port[2].bmdma);
691 }
692 }
693
sil_broken_system_poweroff(struct pci_dev * pdev)694 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
695 {
696 static const struct dmi_system_id broken_systems[] = {
697 {
698 .ident = "HP Compaq nx6325",
699 .matches = {
700 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
701 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
702 },
703 /* PCI slot number of the controller */
704 .driver_data = (void *)0x12UL,
705 },
706
707 { } /* terminate list */
708 };
709 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
710
711 if (dmi) {
712 unsigned long slot = (unsigned long)dmi->driver_data;
713 /* apply the quirk only to on-board controllers */
714 return slot == PCI_SLOT(pdev->devfn);
715 }
716
717 return false;
718 }
719
sil_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)720 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
721 {
722 int board_id = ent->driver_data;
723 struct ata_port_info pi = sil_port_info[board_id];
724 const struct ata_port_info *ppi[] = { &pi, NULL };
725 struct ata_host *host;
726 void __iomem *mmio_base;
727 int n_ports, rc;
728 unsigned int i;
729
730 ata_print_version_once(&pdev->dev, DRV_VERSION);
731
732 /* allocate host */
733 n_ports = 2;
734 if (board_id == sil_3114)
735 n_ports = 4;
736
737 if (sil_broken_system_poweroff(pdev)) {
738 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
739 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
740 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
741 "on poweroff and hibernation\n");
742 }
743
744 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
745 if (!host)
746 return -ENOMEM;
747
748 /* acquire resources and fill host */
749 rc = pcim_enable_device(pdev);
750 if (rc)
751 return rc;
752
753 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
754 if (rc == -EBUSY)
755 pcim_pin_device(pdev);
756 if (rc)
757 return rc;
758 host->iomap = pcim_iomap_table(pdev);
759
760 rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
761 if (rc)
762 return rc;
763
764 mmio_base = host->iomap[SIL_MMIO_BAR];
765
766 for (i = 0; i < host->n_ports; i++) {
767 struct ata_port *ap = host->ports[i];
768 struct ata_ioports *ioaddr = &ap->ioaddr;
769
770 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
771 ioaddr->altstatus_addr =
772 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
773 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
774 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
775 ata_sff_std_ports(ioaddr);
776
777 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
778 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
779 }
780
781 /* initialize and activate */
782 sil_init_controller(host);
783
784 pci_set_master(pdev);
785 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
786 &sil_sht);
787 }
788
789 #ifdef CONFIG_PM_SLEEP
sil_pci_device_resume(struct pci_dev * pdev)790 static int sil_pci_device_resume(struct pci_dev *pdev)
791 {
792 struct ata_host *host = pci_get_drvdata(pdev);
793 int rc;
794
795 rc = ata_pci_device_do_resume(pdev);
796 if (rc)
797 return rc;
798
799 sil_init_controller(host);
800 ata_host_resume(host);
801
802 return 0;
803 }
804 #endif
805
806 module_pci_driver(sil_pci_driver);
807
