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[net-next-2.6.git] / drivers / ata / sata_sil.c
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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
54enum {
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 | ATA_FLAG_NO_LEGACY |
65 ATA_FLAG_MMIO,
66
67 /*
68 * Controller IDs
69 */
70 sil_3112 = 0,
71 sil_3112_no_sata_irq = 1,
72 sil_3512 = 2,
73 sil_3114 = 3,
74
75 /*
76 * Register offsets
77 */
78 SIL_SYSCFG = 0x48,
79
80 /*
81 * Register bits
82 */
83 /* SYSCFG */
84 SIL_MASK_IDE0_INT = (1 << 22),
85 SIL_MASK_IDE1_INT = (1 << 23),
86 SIL_MASK_IDE2_INT = (1 << 24),
87 SIL_MASK_IDE3_INT = (1 << 25),
88 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
89 SIL_MASK_4PORT = SIL_MASK_2PORT |
90 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
91
92 /* BMDMA/BMDMA2 */
93 SIL_INTR_STEERING = (1 << 1),
94
95 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */
96 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */
97 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */
98 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */
99 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */
100 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */
101 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */
102 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */
103 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */
104 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */
105
106 /* SIEN */
107 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */
108
109 /*
110 * Others
111 */
112 SIL_QUIRK_MOD15WRITE = (1 << 0),
113 SIL_QUIRK_UDMA5MAX = (1 << 1),
114};
115
116static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
117#ifdef CONFIG_PM
118static int sil_pci_device_resume(struct pci_dev *pdev);
119#endif
120static void sil_dev_config(struct ata_device *dev);
121static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
122static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
123static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
124static void sil_qc_prep(struct ata_queued_cmd *qc);
125static void sil_bmdma_setup(struct ata_queued_cmd *qc);
126static void sil_bmdma_start(struct ata_queued_cmd *qc);
127static void sil_bmdma_stop(struct ata_queued_cmd *qc);
128static void sil_freeze(struct ata_port *ap);
129static void sil_thaw(struct ata_port *ap);
130
131
132static const struct pci_device_id sil_pci_tbl[] = {
133 { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
134 { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
135 { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
136 { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
137 { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
138 { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
139 { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
140
141 { } /* terminate list */
142};
143
144
145/* TODO firmware versions should be added - eric */
146static const struct sil_drivelist {
147 const char *product;
148 unsigned int quirk;
149} sil_blacklist [] = {
150 { "ST320012AS", SIL_QUIRK_MOD15WRITE },
151 { "ST330013AS", SIL_QUIRK_MOD15WRITE },
152 { "ST340017AS", SIL_QUIRK_MOD15WRITE },
153 { "ST360015AS", SIL_QUIRK_MOD15WRITE },
154 { "ST380023AS", SIL_QUIRK_MOD15WRITE },
155 { "ST3120023AS", SIL_QUIRK_MOD15WRITE },
156 { "ST340014ASL", SIL_QUIRK_MOD15WRITE },
157 { "ST360014ASL", SIL_QUIRK_MOD15WRITE },
158 { "ST380011ASL", SIL_QUIRK_MOD15WRITE },
159 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
160 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
161 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
162 { }
163};
164
165static struct pci_driver sil_pci_driver = {
166 .name = DRV_NAME,
167 .id_table = sil_pci_tbl,
168 .probe = sil_init_one,
169 .remove = ata_pci_remove_one,
170#ifdef CONFIG_PM
171 .suspend = ata_pci_device_suspend,
172 .resume = sil_pci_device_resume,
173#endif
174};
175
176static struct scsi_host_template sil_sht = {
177 ATA_BASE_SHT(DRV_NAME),
178 /** These controllers support Large Block Transfer which allows
179 transfer chunks up to 2GB and which cross 64KB boundaries,
180 therefore the DMA limits are more relaxed than standard ATA SFF. */
181 .dma_boundary = SIL_DMA_BOUNDARY,
182 .sg_tablesize = ATA_MAX_PRD
183};
184
185static struct ata_port_operations sil_ops = {
186 .inherits = &ata_bmdma32_port_ops,
187 .dev_config = sil_dev_config,
188 .set_mode = sil_set_mode,
189 .bmdma_setup = sil_bmdma_setup,
190 .bmdma_start = sil_bmdma_start,
191 .bmdma_stop = sil_bmdma_stop,
192 .qc_prep = sil_qc_prep,
193 .freeze = sil_freeze,
194 .thaw = sil_thaw,
195 .scr_read = sil_scr_read,
196 .scr_write = sil_scr_write,
197};
198
199static const struct ata_port_info sil_port_info[] = {
200 /* sil_3112 */
201 {
202 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
203 .pio_mask = ATA_PIO4,
204 .mwdma_mask = ATA_MWDMA2,
205 .udma_mask = ATA_UDMA5,
206 .port_ops = &sil_ops,
207 },
208 /* sil_3112_no_sata_irq */
209 {
210 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
211 SIL_FLAG_NO_SATA_IRQ,
212 .pio_mask = ATA_PIO4,
213 .mwdma_mask = ATA_MWDMA2,
214 .udma_mask = ATA_UDMA5,
215 .port_ops = &sil_ops,
216 },
217 /* sil_3512 */
218 {
219 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
220 .pio_mask = ATA_PIO4,
221 .mwdma_mask = ATA_MWDMA2,
222 .udma_mask = ATA_UDMA5,
223 .port_ops = &sil_ops,
224 },
225 /* sil_3114 */
226 {
227 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
228 .pio_mask = ATA_PIO4,
229 .mwdma_mask = ATA_MWDMA2,
230 .udma_mask = ATA_UDMA5,
231 .port_ops = &sil_ops,
232 },
233};
234
235/* per-port register offsets */
236/* TODO: we can probably calculate rather than use a table */
237static const struct {
238 unsigned long tf; /* ATA taskfile register block */
239 unsigned long ctl; /* ATA control/altstatus register block */
240 unsigned long bmdma; /* DMA register block */
241 unsigned long bmdma2; /* DMA register block #2 */
242 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
243 unsigned long scr; /* SATA control register block */
244 unsigned long sien; /* SATA Interrupt Enable register */
245 unsigned long xfer_mode;/* data transfer mode register */
246 unsigned long sfis_cfg; /* SATA FIS reception config register */
247} sil_port[] = {
248 /* port 0 ... */
249 /* tf ctl bmdma bmdma2 fifo scr sien mode sfis */
250 { 0x80, 0x8A, 0x0, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
251 { 0xC0, 0xCA, 0x8, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
252 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
253 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
254 /* ... port 3 */
255};
256
257MODULE_AUTHOR("Jeff Garzik");
258MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
259MODULE_LICENSE("GPL");
260MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
261MODULE_VERSION(DRV_VERSION);
262
263static int slow_down;
264module_param(slow_down, int, 0444);
265MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
266
267
268static void sil_bmdma_stop(struct ata_queued_cmd *qc)
269{
270 struct ata_port *ap = qc->ap;
271 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
272 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
273
274 /* clear start/stop bit - can safely always write 0 */
275 iowrite8(0, bmdma2);
276
277 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
278 ata_sff_dma_pause(ap);
279}
280
281static void sil_bmdma_setup(struct ata_queued_cmd *qc)
282{
283 struct ata_port *ap = qc->ap;
284 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
285
286 /* load PRD table addr. */
287 iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
288
289 /* issue r/w command */
290 ap->ops->sff_exec_command(ap, &qc->tf);
291}
292
293static void sil_bmdma_start(struct ata_queued_cmd *qc)
294{
295 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
296 struct ata_port *ap = qc->ap;
297 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
298 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
299 u8 dmactl = ATA_DMA_START;
300
301 /* set transfer direction, start host DMA transaction
302 Note: For Large Block Transfer to work, the DMA must be started
303 using the bmdma2 register. */
304 if (!rw)
305 dmactl |= ATA_DMA_WR;
306 iowrite8(dmactl, bmdma2);
307}
308
309/* The way God intended PCI IDE scatter/gather lists to look and behave... */
310static void sil_fill_sg(struct ata_queued_cmd *qc)
311{
312 struct scatterlist *sg;
313 struct ata_port *ap = qc->ap;
314 struct ata_bmdma_prd *prd, *last_prd = NULL;
315 unsigned int si;
316
317 prd = &ap->bmdma_prd[0];
318 for_each_sg(qc->sg, sg, qc->n_elem, si) {
319 /* Note h/w doesn't support 64-bit, so we unconditionally
320 * truncate dma_addr_t to u32.
321 */
322 u32 addr = (u32) sg_dma_address(sg);
323 u32 sg_len = sg_dma_len(sg);
324
325 prd->addr = cpu_to_le32(addr);
326 prd->flags_len = cpu_to_le32(sg_len);
327 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
328
329 last_prd = prd;
330 prd++;
331 }
332
333 if (likely(last_prd))
334 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
335}
336
337static void sil_qc_prep(struct ata_queued_cmd *qc)
338{
339 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
340 return;
341
342 sil_fill_sg(qc);
343}
344
345static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
346{
347 u8 cache_line = 0;
348 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
349 return cache_line;
350}
351
352/**
353 * sil_set_mode - wrap set_mode functions
354 * @link: link to set up
355 * @r_failed: returned device when we fail
356 *
357 * Wrap the libata method for device setup as after the setup we need
358 * to inspect the results and do some configuration work
359 */
360
361static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
362{
363 struct ata_port *ap = link->ap;
364 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
365 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
366 struct ata_device *dev;
367 u32 tmp, dev_mode[2] = { };
368 int rc;
369
370 rc = ata_do_set_mode(link, r_failed);
371 if (rc)
372 return rc;
373
374 ata_for_each_dev(dev, link, ALL) {
375 if (!ata_dev_enabled(dev))
376 dev_mode[dev->devno] = 0; /* PIO0/1/2 */
377 else if (dev->flags & ATA_DFLAG_PIO)
378 dev_mode[dev->devno] = 1; /* PIO3/4 */
379 else
380 dev_mode[dev->devno] = 3; /* UDMA */
381 /* value 2 indicates MDMA */
382 }
383
384 tmp = readl(addr);
385 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
386 tmp |= dev_mode[0];
387 tmp |= (dev_mode[1] << 4);
388 writel(tmp, addr);
389 readl(addr); /* flush */
390 return 0;
391}
392
393static inline void __iomem *sil_scr_addr(struct ata_port *ap,
394 unsigned int sc_reg)
395{
396 void __iomem *offset = ap->ioaddr.scr_addr;
397
398 switch (sc_reg) {
399 case SCR_STATUS:
400 return offset + 4;
401 case SCR_ERROR:
402 return offset + 8;
403 case SCR_CONTROL:
404 return offset;
405 default:
406 /* do nothing */
407 break;
408 }
409
410 return NULL;
411}
412
413static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
414{
415 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
416
417 if (mmio) {
418 *val = readl(mmio);
419 return 0;
420 }
421 return -EINVAL;
422}
423
424static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
425{
426 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
427
428 if (mmio) {
429 writel(val, mmio);
430 return 0;
431 }
432 return -EINVAL;
433}
434
435static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
436{
437 struct ata_eh_info *ehi = &ap->link.eh_info;
438 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
439 u8 status;
440
441 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
442 u32 serror;
443
444 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
445 * controllers continue to assert IRQ as long as
446 * SError bits are pending. Clear SError immediately.
447 */
448 sil_scr_read(&ap->link, SCR_ERROR, &serror);
449 sil_scr_write(&ap->link, SCR_ERROR, serror);
450
451 /* Sometimes spurious interrupts occur, double check
452 * it's PHYRDY CHG.
453 */
454 if (serror & SERR_PHYRDY_CHG) {
455 ap->link.eh_info.serror |= serror;
456 goto freeze;
457 }
458
459 if (!(bmdma2 & SIL_DMA_COMPLETE))
460 return;
461 }
462
463 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
464 /* this sometimes happens, just clear IRQ */
465 ap->ops->sff_check_status(ap);
466 return;
467 }
468
469 /* Check whether we are expecting interrupt in this state */
470 switch (ap->hsm_task_state) {
471 case HSM_ST_FIRST:
472 /* Some pre-ATAPI-4 devices assert INTRQ
473 * at this state when ready to receive CDB.
474 */
475
476 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
477 * The flag was turned on only for atapi devices. No
478 * need to check ata_is_atapi(qc->tf.protocol) again.
479 */
480 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
481 goto err_hsm;
482 break;
483 case HSM_ST_LAST:
484 if (ata_is_dma(qc->tf.protocol)) {
485 /* clear DMA-Start bit */
486 ap->ops->bmdma_stop(qc);
487
488 if (bmdma2 & SIL_DMA_ERROR) {
489 qc->err_mask |= AC_ERR_HOST_BUS;
490 ap->hsm_task_state = HSM_ST_ERR;
491 }
492 }
493 break;
494 case HSM_ST:
495 break;
496 default:
497 goto err_hsm;
498 }
499
500 /* check main status, clearing INTRQ */
501 status = ap->ops->sff_check_status(ap);
502 if (unlikely(status & ATA_BUSY))
503 goto err_hsm;
504
505 /* ack bmdma irq events */
506 ata_bmdma_irq_clear(ap);
507
508 /* kick HSM in the ass */
509 ata_sff_hsm_move(ap, qc, status, 0);
510
511 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
512 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
513
514 return;
515
516 err_hsm:
517 qc->err_mask |= AC_ERR_HSM;
518 freeze:
519 ata_port_freeze(ap);
520}
521
522static irqreturn_t sil_interrupt(int irq, void *dev_instance)
523{
524 struct ata_host *host = dev_instance;
525 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
526 int handled = 0;
527 int i;
528
529 spin_lock(&host->lock);
530
531 for (i = 0; i < host->n_ports; i++) {
532 struct ata_port *ap = host->ports[i];
533 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
534
535 /* turn off SATA_IRQ if not supported */
536 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
537 bmdma2 &= ~SIL_DMA_SATA_IRQ;
538
539 if (bmdma2 == 0xffffffff ||
540 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
541 continue;
542
543 sil_host_intr(ap, bmdma2);
544 handled = 1;
545 }
546
547 spin_unlock(&host->lock);
548
549 return IRQ_RETVAL(handled);
550}
551
552static void sil_freeze(struct ata_port *ap)
553{
554 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
555 u32 tmp;
556
557 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
558 writel(0, mmio_base + sil_port[ap->port_no].sien);
559
560 /* plug IRQ */
561 tmp = readl(mmio_base + SIL_SYSCFG);
562 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
563 writel(tmp, mmio_base + SIL_SYSCFG);
564 readl(mmio_base + SIL_SYSCFG); /* flush */
565
566 /* Ensure DMA_ENABLE is off.
567 *
568 * This is because the controller will not give us access to the
569 * taskfile registers while a DMA is in progress
570 */
571 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
572 ap->ioaddr.bmdma_addr);
573
574 /* According to ata_bmdma_stop, an HDMA transition requires
575 * on PIO cycle. But we can't read a taskfile register.
576 */
577 ioread8(ap->ioaddr.bmdma_addr);
578}
579
580static void sil_thaw(struct ata_port *ap)
581{
582 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
583 u32 tmp;
584
585 /* clear IRQ */
586 ap->ops->sff_check_status(ap);
587 ata_bmdma_irq_clear(ap);
588
589 /* turn on SATA IRQ if supported */
590 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
591 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
592
593 /* turn on IRQ */
594 tmp = readl(mmio_base + SIL_SYSCFG);
595 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
596 writel(tmp, mmio_base + SIL_SYSCFG);
597}
598
599/**
600 * sil_dev_config - Apply device/host-specific errata fixups
601 * @dev: Device to be examined
602 *
603 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
604 * device is known to be present, this function is called.
605 * We apply two errata fixups which are specific to Silicon Image,
606 * a Seagate and a Maxtor fixup.
607 *
608 * For certain Seagate devices, we must limit the maximum sectors
609 * to under 8K.
610 *
611 * For certain Maxtor devices, we must not program the drive
612 * beyond udma5.
613 *
614 * Both fixups are unfairly pessimistic. As soon as I get more
615 * information on these errata, I will create a more exhaustive
616 * list, and apply the fixups to only the specific
617 * devices/hosts/firmwares that need it.
618 *
619 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
620 * The Maxtor quirk is in the blacklist, but I'm keeping the original
621 * pessimistic fix for the following reasons...
622 * - There seems to be less info on it, only one device gleaned off the
623 * Windows driver, maybe only one is affected. More info would be greatly
624 * appreciated.
625 * - But then again UDMA5 is hardly anything to complain about
626 */
627static void sil_dev_config(struct ata_device *dev)
628{
629 struct ata_port *ap = dev->link->ap;
630 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
631 unsigned int n, quirks = 0;
632 unsigned char model_num[ATA_ID_PROD_LEN + 1];
633
634 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
635
636 for (n = 0; sil_blacklist[n].product; n++)
637 if (!strcmp(sil_blacklist[n].product, model_num)) {
638 quirks = sil_blacklist[n].quirk;
639 break;
640 }
641
642 /* limit requests to 15 sectors */
643 if (slow_down ||
644 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
645 (quirks & SIL_QUIRK_MOD15WRITE))) {
646 if (print_info)
647 ata_dev_printk(dev, KERN_INFO, "applying Seagate "
648 "errata fix (mod15write workaround)\n");
649 dev->max_sectors = 15;
650 return;
651 }
652
653 /* limit to udma5 */
654 if (quirks & SIL_QUIRK_UDMA5MAX) {
655 if (print_info)
656 ata_dev_printk(dev, KERN_INFO, "applying Maxtor "
657 "errata fix %s\n", model_num);
658 dev->udma_mask &= ATA_UDMA5;
659 return;
660 }
661}
662
663static void sil_init_controller(struct ata_host *host)
664{
665 struct pci_dev *pdev = to_pci_dev(host->dev);
666 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
667 u8 cls;
668 u32 tmp;
669 int i;
670
671 /* Initialize FIFO PCI bus arbitration */
672 cls = sil_get_device_cache_line(pdev);
673 if (cls) {
674 cls >>= 3;
675 cls++; /* cls = (line_size/8)+1 */
676 for (i = 0; i < host->n_ports; i++)
677 writew(cls << 8 | cls,
678 mmio_base + sil_port[i].fifo_cfg);
679 } else
680 dev_printk(KERN_WARNING, &pdev->dev,
681 "cache line size not set. Driver may not function\n");
682
683 /* Apply R_ERR on DMA activate FIS errata workaround */
684 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
685 int cnt;
686
687 for (i = 0, cnt = 0; i < host->n_ports; i++) {
688 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
689 if ((tmp & 0x3) != 0x01)
690 continue;
691 if (!cnt)
692 dev_printk(KERN_INFO, &pdev->dev,
693 "Applying R_ERR on DMA activate "
694 "FIS errata fix\n");
695 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
696 cnt++;
697 }
698 }
699
700 if (host->n_ports == 4) {
701 /* flip the magic "make 4 ports work" bit */
702 tmp = readl(mmio_base + sil_port[2].bmdma);
703 if ((tmp & SIL_INTR_STEERING) == 0)
704 writel(tmp | SIL_INTR_STEERING,
705 mmio_base + sil_port[2].bmdma);
706 }
707}
708
709static bool sil_broken_system_poweroff(struct pci_dev *pdev)
710{
711 static const struct dmi_system_id broken_systems[] = {
712 {
713 .ident = "HP Compaq nx6325",
714 .matches = {
715 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
716 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
717 },
718 /* PCI slot number of the controller */
719 .driver_data = (void *)0x12UL,
720 },
721
722 { } /* terminate list */
723 };
724 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
725
726 if (dmi) {
727 unsigned long slot = (unsigned long)dmi->driver_data;
728 /* apply the quirk only to on-board controllers */
729 return slot == PCI_SLOT(pdev->devfn);
730 }
731
732 return false;
733}
734
735static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
736{
737 static int printed_version;
738 int board_id = ent->driver_data;
739 struct ata_port_info pi = sil_port_info[board_id];
740 const struct ata_port_info *ppi[] = { &pi, NULL };
741 struct ata_host *host;
742 void __iomem *mmio_base;
743 int n_ports, rc;
744 unsigned int i;
745
746 if (!printed_version++)
747 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
748
749 /* allocate host */
750 n_ports = 2;
751 if (board_id == sil_3114)
752 n_ports = 4;
753
754 if (sil_broken_system_poweroff(pdev)) {
755 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
756 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
757 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
758 "on poweroff and hibernation\n");
759 }
760
761 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
762 if (!host)
763 return -ENOMEM;
764
765 /* acquire resources and fill host */
766 rc = pcim_enable_device(pdev);
767 if (rc)
768 return rc;
769
770 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
771 if (rc == -EBUSY)
772 pcim_pin_device(pdev);
773 if (rc)
774 return rc;
775 host->iomap = pcim_iomap_table(pdev);
776
777 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
778 if (rc)
779 return rc;
780 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
781 if (rc)
782 return rc;
783
784 mmio_base = host->iomap[SIL_MMIO_BAR];
785
786 for (i = 0; i < host->n_ports; i++) {
787 struct ata_port *ap = host->ports[i];
788 struct ata_ioports *ioaddr = &ap->ioaddr;
789
790 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
791 ioaddr->altstatus_addr =
792 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
793 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
794 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
795 ata_sff_std_ports(ioaddr);
796
797 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
798 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
799 }
800
801 /* initialize and activate */
802 sil_init_controller(host);
803
804 pci_set_master(pdev);
805 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
806 &sil_sht);
807}
808
809#ifdef CONFIG_PM
810static int sil_pci_device_resume(struct pci_dev *pdev)
811{
812 struct ata_host *host = dev_get_drvdata(&pdev->dev);
813 int rc;
814
815 rc = ata_pci_device_do_resume(pdev);
816 if (rc)
817 return rc;
818
819 sil_init_controller(host);
820 ata_host_resume(host);
821
822 return 0;
823}
824#endif
825
826static int __init sil_init(void)
827{
828 return pci_register_driver(&sil_pci_driver);
829}
830
831static void __exit sil_exit(void)
832{
833 pci_unregister_driver(&sil_pci_driver);
834}
835
836
837module_init(sil_init);
838module_exit(sil_exit);
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