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Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[deliverable/linux.git] / drivers / ata / sata_sil.c
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
48 #define DRV_NAME "sata_sil"
49 #define DRV_VERSION "2.2"
50
51 enum {
52 SIL_MMIO_BAR = 5,
53
54 /*
55 * host flags
56 */
57 SIL_FLAG_NO_SATA_IRQ = (1 << 28),
58 SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
59 SIL_FLAG_MOD15WRITE = (1 << 30),
60
61 SIL_DFL_PORT_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
62 ATA_FLAG_MMIO | ATA_FLAG_HRST_TO_RESUME,
63
64 /*
65 * Controller IDs
66 */
67 sil_3112 = 0,
68 sil_3112_no_sata_irq = 1,
69 sil_3512 = 2,
70 sil_3114 = 3,
71
72 /*
73 * Register offsets
74 */
75 SIL_SYSCFG = 0x48,
76
77 /*
78 * Register bits
79 */
80 /* SYSCFG */
81 SIL_MASK_IDE0_INT = (1 << 22),
82 SIL_MASK_IDE1_INT = (1 << 23),
83 SIL_MASK_IDE2_INT = (1 << 24),
84 SIL_MASK_IDE3_INT = (1 << 25),
85 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
86 SIL_MASK_4PORT = SIL_MASK_2PORT |
87 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
88
89 /* BMDMA/BMDMA2 */
90 SIL_INTR_STEERING = (1 << 1),
91
92 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */
93 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */
94 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */
95 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */
96 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */
97 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */
98 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */
99 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */
100 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */
101 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */
102
103 /* SIEN */
104 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */
105
106 /*
107 * Others
108 */
109 SIL_QUIRK_MOD15WRITE = (1 << 0),
110 SIL_QUIRK_UDMA5MAX = (1 << 1),
111 };
112
113 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
114 #ifdef CONFIG_PM
115 static int sil_pci_device_resume(struct pci_dev *pdev);
116 #endif
117 static void sil_dev_config(struct ata_device *dev);
118 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
119 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
120 static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed);
121 static void sil_freeze(struct ata_port *ap);
122 static void sil_thaw(struct ata_port *ap);
123
124
125 static const struct pci_device_id sil_pci_tbl[] = {
126 { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
127 { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
128 { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
129 { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
130 { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
131 { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
132 { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
133
134 { } /* terminate list */
135 };
136
137
138 /* TODO firmware versions should be added - eric */
139 static const struct sil_drivelist {
140 const char * product;
141 unsigned int quirk;
142 } sil_blacklist [] = {
143 { "ST320012AS", SIL_QUIRK_MOD15WRITE },
144 { "ST330013AS", SIL_QUIRK_MOD15WRITE },
145 { "ST340017AS", SIL_QUIRK_MOD15WRITE },
146 { "ST360015AS", SIL_QUIRK_MOD15WRITE },
147 { "ST380023AS", SIL_QUIRK_MOD15WRITE },
148 { "ST3120023AS", SIL_QUIRK_MOD15WRITE },
149 { "ST340014ASL", SIL_QUIRK_MOD15WRITE },
150 { "ST360014ASL", SIL_QUIRK_MOD15WRITE },
151 { "ST380011ASL", SIL_QUIRK_MOD15WRITE },
152 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
153 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
154 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
155 { }
156 };
157
158 static struct pci_driver sil_pci_driver = {
159 .name = DRV_NAME,
160 .id_table = sil_pci_tbl,
161 .probe = sil_init_one,
162 .remove = ata_pci_remove_one,
163 #ifdef CONFIG_PM
164 .suspend = ata_pci_device_suspend,
165 .resume = sil_pci_device_resume,
166 #endif
167 };
168
169 static struct scsi_host_template sil_sht = {
170 .module = THIS_MODULE,
171 .name = DRV_NAME,
172 .ioctl = ata_scsi_ioctl,
173 .queuecommand = ata_scsi_queuecmd,
174 .can_queue = ATA_DEF_QUEUE,
175 .this_id = ATA_SHT_THIS_ID,
176 .sg_tablesize = LIBATA_MAX_PRD,
177 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
178 .emulated = ATA_SHT_EMULATED,
179 .use_clustering = ATA_SHT_USE_CLUSTERING,
180 .proc_name = DRV_NAME,
181 .dma_boundary = ATA_DMA_BOUNDARY,
182 .slave_configure = ata_scsi_slave_config,
183 .slave_destroy = ata_scsi_slave_destroy,
184 .bios_param = ata_std_bios_param,
185 #ifdef CONFIG_PM
186 .suspend = ata_scsi_device_suspend,
187 .resume = ata_scsi_device_resume,
188 #endif
189 };
190
191 static const struct ata_port_operations sil_ops = {
192 .port_disable = ata_port_disable,
193 .dev_config = sil_dev_config,
194 .tf_load = ata_tf_load,
195 .tf_read = ata_tf_read,
196 .check_status = ata_check_status,
197 .exec_command = ata_exec_command,
198 .dev_select = ata_std_dev_select,
199 .set_mode = sil_set_mode,
200 .bmdma_setup = ata_bmdma_setup,
201 .bmdma_start = ata_bmdma_start,
202 .bmdma_stop = ata_bmdma_stop,
203 .bmdma_status = ata_bmdma_status,
204 .qc_prep = ata_qc_prep,
205 .qc_issue = ata_qc_issue_prot,
206 .data_xfer = ata_data_xfer,
207 .freeze = sil_freeze,
208 .thaw = sil_thaw,
209 .error_handler = ata_bmdma_error_handler,
210 .post_internal_cmd = ata_bmdma_post_internal_cmd,
211 .irq_clear = ata_bmdma_irq_clear,
212 .irq_on = ata_irq_on,
213 .irq_ack = ata_irq_ack,
214 .scr_read = sil_scr_read,
215 .scr_write = sil_scr_write,
216 .port_start = ata_port_start,
217 };
218
219 static const struct ata_port_info sil_port_info[] = {
220 /* sil_3112 */
221 {
222 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
223 .pio_mask = 0x1f, /* pio0-4 */
224 .mwdma_mask = 0x07, /* mwdma0-2 */
225 .udma_mask = 0x3f, /* udma0-5 */
226 .port_ops = &sil_ops,
227 },
228 /* sil_3112_no_sata_irq */
229 {
230 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
231 SIL_FLAG_NO_SATA_IRQ,
232 .pio_mask = 0x1f, /* pio0-4 */
233 .mwdma_mask = 0x07, /* mwdma0-2 */
234 .udma_mask = 0x3f, /* udma0-5 */
235 .port_ops = &sil_ops,
236 },
237 /* sil_3512 */
238 {
239 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
240 .pio_mask = 0x1f, /* pio0-4 */
241 .mwdma_mask = 0x07, /* mwdma0-2 */
242 .udma_mask = 0x3f, /* udma0-5 */
243 .port_ops = &sil_ops,
244 },
245 /* sil_3114 */
246 {
247 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
248 .pio_mask = 0x1f, /* pio0-4 */
249 .mwdma_mask = 0x07, /* mwdma0-2 */
250 .udma_mask = 0x3f, /* udma0-5 */
251 .port_ops = &sil_ops,
252 },
253 };
254
255 /* per-port register offsets */
256 /* TODO: we can probably calculate rather than use a table */
257 static const struct {
258 unsigned long tf; /* ATA taskfile register block */
259 unsigned long ctl; /* ATA control/altstatus register block */
260 unsigned long bmdma; /* DMA register block */
261 unsigned long bmdma2; /* DMA register block #2 */
262 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
263 unsigned long scr; /* SATA control register block */
264 unsigned long sien; /* SATA Interrupt Enable register */
265 unsigned long xfer_mode;/* data transfer mode register */
266 unsigned long sfis_cfg; /* SATA FIS reception config register */
267 } sil_port[] = {
268 /* port 0 ... */
269 { 0x80, 0x8A, 0x00, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
270 { 0xC0, 0xCA, 0x08, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
271 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
272 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
273 /* ... port 3 */
274 };
275
276 MODULE_AUTHOR("Jeff Garzik");
277 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
278 MODULE_LICENSE("GPL");
279 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
280 MODULE_VERSION(DRV_VERSION);
281
282 static int slow_down = 0;
283 module_param(slow_down, int, 0444);
284 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
285
286
287 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
288 {
289 u8 cache_line = 0;
290 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
291 return cache_line;
292 }
293
294 /**
295 * sil_set_mode - wrap set_mode functions
296 * @ap: port to set up
297 * @r_failed: returned device when we fail
298 *
299 * Wrap the libata method for device setup as after the setup we need
300 * to inspect the results and do some configuration work
301 */
302
303 static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed)
304 {
305 struct ata_host *host = ap->host;
306 struct ata_device *dev;
307 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
308 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
309 u32 tmp, dev_mode[2];
310 unsigned int i;
311 int rc;
312
313 rc = ata_do_set_mode(ap, r_failed);
314 if (rc)
315 return rc;
316
317 for (i = 0; i < 2; i++) {
318 dev = &ap->device[i];
319 if (!ata_dev_enabled(dev))
320 dev_mode[i] = 0; /* PIO0/1/2 */
321 else if (dev->flags & ATA_DFLAG_PIO)
322 dev_mode[i] = 1; /* PIO3/4 */
323 else
324 dev_mode[i] = 3; /* UDMA */
325 /* value 2 indicates MDMA */
326 }
327
328 tmp = readl(addr);
329 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
330 tmp |= dev_mode[0];
331 tmp |= (dev_mode[1] << 4);
332 writel(tmp, addr);
333 readl(addr); /* flush */
334 return 0;
335 }
336
337 static inline void __iomem *sil_scr_addr(struct ata_port *ap, unsigned int sc_reg)
338 {
339 void __iomem *offset = ap->ioaddr.scr_addr;
340
341 switch (sc_reg) {
342 case SCR_STATUS:
343 return offset + 4;
344 case SCR_ERROR:
345 return offset + 8;
346 case SCR_CONTROL:
347 return offset;
348 default:
349 /* do nothing */
350 break;
351 }
352
353 return NULL;
354 }
355
356 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg)
357 {
358 void __iomem *mmio = sil_scr_addr(ap, sc_reg);
359 if (mmio)
360 return readl(mmio);
361 return 0xffffffffU;
362 }
363
364 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
365 {
366 void __iomem *mmio = sil_scr_addr(ap, sc_reg);
367 if (mmio)
368 writel(val, mmio);
369 }
370
371 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
372 {
373 struct ata_eh_info *ehi = &ap->eh_info;
374 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
375 u8 status;
376
377 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
378 u32 serror;
379
380 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
381 * controllers continue to assert IRQ as long as
382 * SError bits are pending. Clear SError immediately.
383 */
384 serror = sil_scr_read(ap, SCR_ERROR);
385 sil_scr_write(ap, SCR_ERROR, serror);
386
387 /* Trigger hotplug and accumulate SError only if the
388 * port isn't already frozen. Otherwise, PHY events
389 * during hardreset makes controllers with broken SIEN
390 * repeat probing needlessly.
391 */
392 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
393 ata_ehi_hotplugged(&ap->eh_info);
394 ap->eh_info.serror |= serror;
395 }
396
397 goto freeze;
398 }
399
400 if (unlikely(!qc))
401 goto freeze;
402
403 if (unlikely(qc->tf.flags & ATA_TFLAG_POLLING)) {
404 /* this sometimes happens, just clear IRQ */
405 ata_chk_status(ap);
406 return;
407 }
408
409 /* Check whether we are expecting interrupt in this state */
410 switch (ap->hsm_task_state) {
411 case HSM_ST_FIRST:
412 /* Some pre-ATAPI-4 devices assert INTRQ
413 * at this state when ready to receive CDB.
414 */
415
416 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
417 * The flag was turned on only for atapi devices.
418 * No need to check is_atapi_taskfile(&qc->tf) again.
419 */
420 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
421 goto err_hsm;
422 break;
423 case HSM_ST_LAST:
424 if (qc->tf.protocol == ATA_PROT_DMA ||
425 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
426 /* clear DMA-Start bit */
427 ap->ops->bmdma_stop(qc);
428
429 if (bmdma2 & SIL_DMA_ERROR) {
430 qc->err_mask |= AC_ERR_HOST_BUS;
431 ap->hsm_task_state = HSM_ST_ERR;
432 }
433 }
434 break;
435 case HSM_ST:
436 break;
437 default:
438 goto err_hsm;
439 }
440
441 /* check main status, clearing INTRQ */
442 status = ata_chk_status(ap);
443 if (unlikely(status & ATA_BUSY))
444 goto err_hsm;
445
446 /* ack bmdma irq events */
447 ata_bmdma_irq_clear(ap);
448
449 /* kick HSM in the ass */
450 ata_hsm_move(ap, qc, status, 0);
451
452 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
453 qc->tf.protocol == ATA_PROT_ATAPI_DMA))
454 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
455
456 return;
457
458 err_hsm:
459 qc->err_mask |= AC_ERR_HSM;
460 freeze:
461 ata_port_freeze(ap);
462 }
463
464 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
465 {
466 struct ata_host *host = dev_instance;
467 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
468 int handled = 0;
469 int i;
470
471 spin_lock(&host->lock);
472
473 for (i = 0; i < host->n_ports; i++) {
474 struct ata_port *ap = host->ports[i];
475 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
476
477 if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED))
478 continue;
479
480 /* turn off SATA_IRQ if not supported */
481 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
482 bmdma2 &= ~SIL_DMA_SATA_IRQ;
483
484 if (bmdma2 == 0xffffffff ||
485 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
486 continue;
487
488 sil_host_intr(ap, bmdma2);
489 handled = 1;
490 }
491
492 spin_unlock(&host->lock);
493
494 return IRQ_RETVAL(handled);
495 }
496
497 static void sil_freeze(struct ata_port *ap)
498 {
499 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
500 u32 tmp;
501
502 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
503 writel(0, mmio_base + sil_port[ap->port_no].sien);
504
505 /* plug IRQ */
506 tmp = readl(mmio_base + SIL_SYSCFG);
507 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
508 writel(tmp, mmio_base + SIL_SYSCFG);
509 readl(mmio_base + SIL_SYSCFG); /* flush */
510 }
511
512 static void sil_thaw(struct ata_port *ap)
513 {
514 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
515 u32 tmp;
516
517 /* clear IRQ */
518 ata_chk_status(ap);
519 ata_bmdma_irq_clear(ap);
520
521 /* turn on SATA IRQ if supported */
522 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
523 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
524
525 /* turn on IRQ */
526 tmp = readl(mmio_base + SIL_SYSCFG);
527 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
528 writel(tmp, mmio_base + SIL_SYSCFG);
529 }
530
531 /**
532 * sil_dev_config - Apply device/host-specific errata fixups
533 * @dev: Device to be examined
534 *
535 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
536 * device is known to be present, this function is called.
537 * We apply two errata fixups which are specific to Silicon Image,
538 * a Seagate and a Maxtor fixup.
539 *
540 * For certain Seagate devices, we must limit the maximum sectors
541 * to under 8K.
542 *
543 * For certain Maxtor devices, we must not program the drive
544 * beyond udma5.
545 *
546 * Both fixups are unfairly pessimistic. As soon as I get more
547 * information on these errata, I will create a more exhaustive
548 * list, and apply the fixups to only the specific
549 * devices/hosts/firmwares that need it.
550 *
551 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
552 * The Maxtor quirk is in the blacklist, but I'm keeping the original
553 * pessimistic fix for the following reasons...
554 * - There seems to be less info on it, only one device gleaned off the
555 * Windows driver, maybe only one is affected. More info would be greatly
556 * appreciated.
557 * - But then again UDMA5 is hardly anything to complain about
558 */
559 static void sil_dev_config(struct ata_device *dev)
560 {
561 struct ata_port *ap = dev->ap;
562 int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
563 unsigned int n, quirks = 0;
564 unsigned char model_num[ATA_ID_PROD_LEN + 1];
565
566 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
567
568 for (n = 0; sil_blacklist[n].product; n++)
569 if (!strcmp(sil_blacklist[n].product, model_num)) {
570 quirks = sil_blacklist[n].quirk;
571 break;
572 }
573
574 /* limit requests to 15 sectors */
575 if (slow_down ||
576 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
577 (quirks & SIL_QUIRK_MOD15WRITE))) {
578 if (print_info)
579 ata_dev_printk(dev, KERN_INFO, "applying Seagate "
580 "errata fix (mod15write workaround)\n");
581 dev->max_sectors = 15;
582 return;
583 }
584
585 /* limit to udma5 */
586 if (quirks & SIL_QUIRK_UDMA5MAX) {
587 if (print_info)
588 ata_dev_printk(dev, KERN_INFO, "applying Maxtor "
589 "errata fix %s\n", model_num);
590 dev->udma_mask &= ATA_UDMA5;
591 return;
592 }
593 }
594
595 static void sil_init_controller(struct ata_host *host)
596 {
597 struct pci_dev *pdev = to_pci_dev(host->dev);
598 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
599 u8 cls;
600 u32 tmp;
601 int i;
602
603 /* Initialize FIFO PCI bus arbitration */
604 cls = sil_get_device_cache_line(pdev);
605 if (cls) {
606 cls >>= 3;
607 cls++; /* cls = (line_size/8)+1 */
608 for (i = 0; i < host->n_ports; i++)
609 writew(cls << 8 | cls,
610 mmio_base + sil_port[i].fifo_cfg);
611 } else
612 dev_printk(KERN_WARNING, &pdev->dev,
613 "cache line size not set. Driver may not function\n");
614
615 /* Apply R_ERR on DMA activate FIS errata workaround */
616 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
617 int cnt;
618
619 for (i = 0, cnt = 0; i < host->n_ports; i++) {
620 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
621 if ((tmp & 0x3) != 0x01)
622 continue;
623 if (!cnt)
624 dev_printk(KERN_INFO, &pdev->dev,
625 "Applying R_ERR on DMA activate "
626 "FIS errata fix\n");
627 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
628 cnt++;
629 }
630 }
631
632 if (host->n_ports == 4) {
633 /* flip the magic "make 4 ports work" bit */
634 tmp = readl(mmio_base + sil_port[2].bmdma);
635 if ((tmp & SIL_INTR_STEERING) == 0)
636 writel(tmp | SIL_INTR_STEERING,
637 mmio_base + sil_port[2].bmdma);
638 }
639 }
640
641 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
642 {
643 static int printed_version;
644 int board_id = ent->driver_data;
645 const struct ata_port_info *ppi[] = { &sil_port_info[board_id], NULL };
646 struct ata_host *host;
647 void __iomem *mmio_base;
648 int n_ports, rc;
649 unsigned int i;
650
651 if (!printed_version++)
652 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
653
654 /* allocate host */
655 n_ports = 2;
656 if (board_id == sil_3114)
657 n_ports = 4;
658
659 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
660 if (!host)
661 return -ENOMEM;
662
663 /* acquire resources and fill host */
664 rc = pcim_enable_device(pdev);
665 if (rc)
666 return rc;
667
668 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
669 if (rc == -EBUSY)
670 pcim_pin_device(pdev);
671 if (rc)
672 return rc;
673 host->iomap = pcim_iomap_table(pdev);
674
675 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
676 if (rc)
677 return rc;
678 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
679 if (rc)
680 return rc;
681
682 mmio_base = host->iomap[SIL_MMIO_BAR];
683
684 for (i = 0; i < host->n_ports; i++) {
685 struct ata_ioports *ioaddr = &host->ports[i]->ioaddr;
686
687 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
688 ioaddr->altstatus_addr =
689 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
690 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
691 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
692 ata_std_ports(ioaddr);
693 }
694
695 /* initialize and activate */
696 sil_init_controller(host);
697
698 pci_set_master(pdev);
699 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
700 &sil_sht);
701 }
702
703 #ifdef CONFIG_PM
704 static int sil_pci_device_resume(struct pci_dev *pdev)
705 {
706 struct ata_host *host = dev_get_drvdata(&pdev->dev);
707 int rc;
708
709 rc = ata_pci_device_do_resume(pdev);
710 if (rc)
711 return rc;
712
713 sil_init_controller(host);
714 ata_host_resume(host);
715
716 return 0;
717 }
718 #endif
719
720 static int __init sil_init(void)
721 {
722 return pci_register_driver(&sil_pci_driver);
723 }
724
725 static void __exit sil_exit(void)
726 {
727 pci_unregister_driver(&sil_pci_driver);
728 }
729
730
731 module_init(sil_init);
732 module_exit(sil_exit);
Linux kernel - Deliverables
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