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more accurate window sizes
[cor.git] / drivers / ata / sata_sil.c
blob75321f1ceba523e1632ed5e12eb3ccef59d990e8
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 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
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
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
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... */
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
320 static enum ata_completion_errors sil_qc_prep(struct ata_queued_cmd *qc)
321 {
322 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
323 return AC_ERR_OK;
324
325 sil_fill_sg(qc);
326
327 return AC_ERR_OK;
328 }
329
330 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
331 {
332 u8 cache_line = 0;
333 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
334 return cache_line;
335 }
336
337 /**
338 * sil_set_mode - wrap set_mode functions
339 * @link: link to set up
340 * @r_failed: returned device when we fail
341 *
342 * Wrap the libata method for device setup as after the setup we need
343 * to inspect the results and do some configuration work
344 */
345
346 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
347 {
348 struct ata_port *ap = link->ap;
349 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
350 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
351 struct ata_device *dev;
352 u32 tmp, dev_mode[2] = { };
353 int rc;
354
355 rc = ata_do_set_mode(link, r_failed);
356 if (rc)
357 return rc;
358
359 ata_for_each_dev(dev, link, ALL) {
360 if (!ata_dev_enabled(dev))
361 dev_mode[dev->devno] = 0; /* PIO0/1/2 */
362 else if (dev->flags & ATA_DFLAG_PIO)
363 dev_mode[dev->devno] = 1; /* PIO3/4 */
364 else
365 dev_mode[dev->devno] = 3; /* UDMA */
366 /* value 2 indicates MDMA */
367 }
368
369 tmp = readl(addr);
370 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
371 tmp |= dev_mode[0];
372 tmp |= (dev_mode[1] << 4);
373 writel(tmp, addr);
374 readl(addr); /* flush */
375 return 0;
376 }
377
378 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
379 unsigned int sc_reg)
380 {
381 void __iomem *offset = ap->ioaddr.scr_addr;
382
383 switch (sc_reg) {
384 case SCR_STATUS:
385 return offset + 4;
386 case SCR_ERROR:
387 return offset + 8;
388 case SCR_CONTROL:
389 return offset;
390 default:
391 /* do nothing */
392 break;
393 }
394
395 return NULL;
396 }
397
398 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
399 {
400 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
401
402 if (mmio) {
403 *val = readl(mmio);
404 return 0;
405 }
406 return -EINVAL;
407 }
408
409 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
410 {
411 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
412
413 if (mmio) {
414 writel(val, mmio);
415 return 0;
416 }
417 return -EINVAL;
418 }
419
420 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
421 {
422 struct ata_eh_info *ehi = &ap->link.eh_info;
423 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
424 u8 status;
425
426 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
427 u32 serror = 0xffffffff;
428
429 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
430 * controllers continue to assert IRQ as long as
431 * SError bits are pending. Clear SError immediately.
432 */
433 sil_scr_read(&ap->link, SCR_ERROR, &serror);
434 sil_scr_write(&ap->link, SCR_ERROR, serror);
435
436 /* Sometimes spurious interrupts occur, double check
437 * it's PHYRDY CHG.
438 */
439 if (serror & SERR_PHYRDY_CHG) {
440 ap->link.eh_info.serror |= serror;
441 goto freeze;
442 }
443
444 if (!(bmdma2 & SIL_DMA_COMPLETE))
445 return;
446 }
447
448 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
449 /* this sometimes happens, just clear IRQ */
450 ap->ops->sff_check_status(ap);
451 return;
452 }
453
454 /* Check whether we are expecting interrupt in this state */
455 switch (ap->hsm_task_state) {
456 case HSM_ST_FIRST:
457 /* Some pre-ATAPI-4 devices assert INTRQ
458 * at this state when ready to receive CDB.
459 */
460
461 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
462 * The flag was turned on only for atapi devices. No
463 * need to check ata_is_atapi(qc->tf.protocol) again.
464 */
465 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
466 goto err_hsm;
467 break;
468 case HSM_ST_LAST:
469 if (ata_is_dma(qc->tf.protocol)) {
470 /* clear DMA-Start bit */
471 ap->ops->bmdma_stop(qc);
472
473 if (bmdma2 & SIL_DMA_ERROR) {
474 qc->err_mask |= AC_ERR_HOST_BUS;
475 ap->hsm_task_state = HSM_ST_ERR;
476 }
477 }
478 break;
479 case HSM_ST:
480 break;
481 default:
482 goto err_hsm;
483 }
484
485 /* check main status, clearing INTRQ */
486 status = ap->ops->sff_check_status(ap);
487 if (unlikely(status & ATA_BUSY))
488 goto err_hsm;
489
490 /* ack bmdma irq events */
491 ata_bmdma_irq_clear(ap);
492
493 /* kick HSM in the ass */
494 ata_sff_hsm_move(ap, qc, status, 0);
495
496 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
497 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
498
499 return;
500
501 err_hsm:
502 qc->err_mask |= AC_ERR_HSM;
503 freeze:
504 ata_port_freeze(ap);
505 }
506
507 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
508 {
509 struct ata_host *host = dev_instance;
510 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
511 int handled = 0;
512 int i;
513
514 spin_lock(&host->lock);
515
516 for (i = 0; i < host->n_ports; i++) {
517 struct ata_port *ap = host->ports[i];
518 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
519
520 /* turn off SATA_IRQ if not supported */
521 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
522 bmdma2 &= ~SIL_DMA_SATA_IRQ;
523
524 if (bmdma2 == 0xffffffff ||
525 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
526 continue;
527
528 sil_host_intr(ap, bmdma2);
529 handled = 1;
530 }
531
532 spin_unlock(&host->lock);
533
534 return IRQ_RETVAL(handled);
535 }
536
537 static void sil_freeze(struct ata_port *ap)
538 {
539 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
540 u32 tmp;
541
542 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
543 writel(0, mmio_base + sil_port[ap->port_no].sien);
544
545 /* plug IRQ */
546 tmp = readl(mmio_base + SIL_SYSCFG);
547 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
548 writel(tmp, mmio_base + SIL_SYSCFG);
549 readl(mmio_base + SIL_SYSCFG); /* flush */
550
551 /* Ensure DMA_ENABLE is off.
552 *
553 * This is because the controller will not give us access to the
554 * taskfile registers while a DMA is in progress
555 */
556 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
557 ap->ioaddr.bmdma_addr);
558
559 /* According to ata_bmdma_stop, an HDMA transition requires
560 * on PIO cycle. But we can't read a taskfile register.
561 */
562 ioread8(ap->ioaddr.bmdma_addr);
563 }
564
565 static void sil_thaw(struct ata_port *ap)
566 {
567 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
568 u32 tmp;
569
570 /* clear IRQ */
571 ap->ops->sff_check_status(ap);
572 ata_bmdma_irq_clear(ap);
573
574 /* turn on SATA IRQ if supported */
575 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
576 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
577
578 /* turn on IRQ */
579 tmp = readl(mmio_base + SIL_SYSCFG);
580 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
581 writel(tmp, mmio_base + SIL_SYSCFG);
582 }
583
584 /**
585 * sil_dev_config - Apply device/host-specific errata fixups
586 * @dev: Device to be examined
587 *
588 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
589 * device is known to be present, this function is called.
590 * We apply two errata fixups which are specific to Silicon Image,
591 * a Seagate and a Maxtor fixup.
592 *
593 * For certain Seagate devices, we must limit the maximum sectors
594 * to under 8K.
595 *
596 * For certain Maxtor devices, we must not program the drive
597 * beyond udma5.
598 *
599 * Both fixups are unfairly pessimistic. As soon as I get more
600 * information on these errata, I will create a more exhaustive
601 * list, and apply the fixups to only the specific
602 * devices/hosts/firmwares that need it.
603 *
604 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
605 * The Maxtor quirk is in the blacklist, but I'm keeping the original
606 * pessimistic fix for the following reasons...
607 * - There seems to be less info on it, only one device gleaned off the
608 * Windows driver, maybe only one is affected. More info would be greatly
609 * appreciated.
610 * - But then again UDMA5 is hardly anything to complain about
611 */
612 static void sil_dev_config(struct ata_device *dev)
613 {
614 struct ata_port *ap = dev->link->ap;
615 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
616 unsigned int n, quirks = 0;
617 unsigned char model_num[ATA_ID_PROD_LEN + 1];
618
619 /* This controller doesn't support trim */
620 dev->horkage |= ATA_HORKAGE_NOTRIM;
621
622 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
623
624 for (n = 0; sil_blacklist[n].product; n++)
625 if (!strcmp(sil_blacklist[n].product, model_num)) {
626 quirks = sil_blacklist[n].quirk;
627 break;
628 }
629
630 /* limit requests to 15 sectors */
631 if (slow_down ||
632 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
633 (quirks & SIL_QUIRK_MOD15WRITE))) {
634 if (print_info)
635 ata_dev_info(dev,
636 "applying Seagate errata fix (mod15write workaround)\n");
637 dev->max_sectors = 15;
638 return;
639 }
640
641 /* limit to udma5 */
642 if (quirks & SIL_QUIRK_UDMA5MAX) {
643 if (print_info)
644 ata_dev_info(dev, "applying Maxtor errata fix %s\n",
645 model_num);
646 dev->udma_mask &= ATA_UDMA5;
647 return;
648 }
649 }
650
651 static void sil_init_controller(struct ata_host *host)
652 {
653 struct pci_dev *pdev = to_pci_dev(host->dev);
654 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
655 u8 cls;
656 u32 tmp;
657 int i;
658
659 /* Initialize FIFO PCI bus arbitration */
660 cls = sil_get_device_cache_line(pdev);
661 if (cls) {
662 cls >>= 3;
663 cls++; /* cls = (line_size/8)+1 */
664 for (i = 0; i < host->n_ports; i++)
665 writew(cls << 8 | cls,
666 mmio_base + sil_port[i].fifo_cfg);
667 } else
668 dev_warn(&pdev->dev,
669 "cache line size not set. Driver may not function\n");
670
671 /* Apply R_ERR on DMA activate FIS errata workaround */
672 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
673 int cnt;
674
675 for (i = 0, cnt = 0; i < host->n_ports; i++) {
676 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
677 if ((tmp & 0x3) != 0x01)
678 continue;
679 if (!cnt)
680 dev_info(&pdev->dev,
681 "Applying R_ERR on DMA activate FIS errata fix\n");
682 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
683 cnt++;
684 }
685 }
686
687 if (host->n_ports == 4) {
688 /* flip the magic "make 4 ports work" bit */
689 tmp = readl(mmio_base + sil_port[2].bmdma);
690 if ((tmp & SIL_INTR_STEERING) == 0)
691 writel(tmp | SIL_INTR_STEERING,
692 mmio_base + sil_port[2].bmdma);
693 }
694 }
695
696 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
697 {
698 static const struct dmi_system_id broken_systems[] = {
699 {
700 .ident = "HP Compaq nx6325",
701 .matches = {
702 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
703 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
704 },
705 /* PCI slot number of the controller */
706 .driver_data = (void *)0x12UL,
707 },
708
709 { } /* terminate list */
710 };
711 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
712
713 if (dmi) {
714 unsigned long slot = (unsigned long)dmi->driver_data;
715 /* apply the quirk only to on-board controllers */
716 return slot == PCI_SLOT(pdev->devfn);
717 }
718
719 return false;
720 }
721
722 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
723 {
724 int board_id = ent->driver_data;
725 struct ata_port_info pi = sil_port_info[board_id];
726 const struct ata_port_info *ppi[] = { &pi, NULL };
727 struct ata_host *host;
728 void __iomem *mmio_base;
729 int n_ports, rc;
730 unsigned int i;
731
732 ata_print_version_once(&pdev->dev, DRV_VERSION);
733
734 /* allocate host */
735 n_ports = 2;
736 if (board_id == sil_3114)
737 n_ports = 4;
738
739 if (sil_broken_system_poweroff(pdev)) {
740 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
741 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
742 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
743 "on poweroff and hibernation\n");
744 }
745
746 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
747 if (!host)
748 return -ENOMEM;
749
750 /* acquire resources and fill host */
751 rc = pcim_enable_device(pdev);
752 if (rc)
753 return rc;
754
755 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
756 if (rc == -EBUSY)
757 pcim_pin_device(pdev);
758 if (rc)
759 return rc;
760 host->iomap = pcim_iomap_table(pdev);
761
762 rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
763 if (rc)
764 return rc;
765
766 mmio_base = host->iomap[SIL_MMIO_BAR];
767
768 for (i = 0; i < host->n_ports; i++) {
769 struct ata_port *ap = host->ports[i];
770 struct ata_ioports *ioaddr = &ap->ioaddr;
771
772 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
773 ioaddr->altstatus_addr =
774 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
775 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
776 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
777 ata_sff_std_ports(ioaddr);
778
779 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
780 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
781 }
782
783 /* initialize and activate */
784 sil_init_controller(host);
785
786 pci_set_master(pdev);
787 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
788 &sil_sht);
789 }
790
791 #ifdef CONFIG_PM_SLEEP
792 static int sil_pci_device_resume(struct pci_dev *pdev)
793 {
794 struct ata_host *host = pci_get_drvdata(pdev);
795 int rc;
796
797 rc = ata_pci_device_do_resume(pdev);
798 if (rc)
799 return rc;
800
801 sil_init_controller(host);
802 ata_host_resume(host);
803
804 return 0;
805 }
806 #endif
807
808 module_pci_driver(sil_pci_driver);
connection oriented routing