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[PATCH] sata_sil: remove unaffected drives from m15w blacklist
[linux-2.6/mini2440.git] / drivers / scsi / sata_sil.c
blobf4e262b06cf2d8571d3306416a0535ad49d5028d
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 "2.0"
50
51 enum {
52 /*
53 * host flags
54 */
55 SIL_FLAG_NO_SATA_IRQ = (1 << 28),
56 SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
57 SIL_FLAG_MOD15WRITE = (1 << 30),
58
59 SIL_DFL_HOST_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
60 ATA_FLAG_MMIO | ATA_FLAG_HRST_TO_RESUME,
61
62 /*
63 * Controller IDs
64 */
65 sil_3112 = 0,
66 sil_3112_no_sata_irq = 1,
67 sil_3512 = 2,
68 sil_3114 = 3,
69
70 /*
71 * Register offsets
72 */
73 SIL_SYSCFG = 0x48,
74
75 /*
76 * Register bits
77 */
78 /* SYSCFG */
79 SIL_MASK_IDE0_INT = (1 << 22),
80 SIL_MASK_IDE1_INT = (1 << 23),
81 SIL_MASK_IDE2_INT = (1 << 24),
82 SIL_MASK_IDE3_INT = (1 << 25),
83 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
84 SIL_MASK_4PORT = SIL_MASK_2PORT |
85 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
86
87 /* BMDMA/BMDMA2 */
88 SIL_INTR_STEERING = (1 << 1),
89
90 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */
91 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */
92 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */
93 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */
94 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */
95 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */
96 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */
97 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */
98 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */
99 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */
100
101 /* SIEN */
102 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */
103
104 /*
105 * Others
106 */
107 SIL_QUIRK_MOD15WRITE = (1 << 0),
108 SIL_QUIRK_UDMA5MAX = (1 << 1),
109 };
110
111 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
112 static int sil_pci_device_resume(struct pci_dev *pdev);
113 static void sil_dev_config(struct ata_port *ap, struct ata_device *dev);
114 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
115 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
116 static void sil_post_set_mode (struct ata_port *ap);
117 static irqreturn_t sil_interrupt(int irq, void *dev_instance,
118 struct pt_regs *regs);
119 static void sil_freeze(struct ata_port *ap);
120 static void sil_thaw(struct ata_port *ap);
121
122
123 static const struct pci_device_id sil_pci_tbl[] = {
124 { 0x1095, 0x3112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
125 { 0x1095, 0x0240, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
126 { 0x1095, 0x3512, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3512 },
127 { 0x1095, 0x3114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3114 },
128 { 0x1002, 0x436e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
129 { 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq },
130 { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq },
131 { } /* terminate list */
132 };
133
134
135 /* TODO firmware versions should be added - eric */
136 static const struct sil_drivelist {
137 const char * product;
138 unsigned int quirk;
139 } sil_blacklist [] = {
140 { "ST320012AS", SIL_QUIRK_MOD15WRITE },
141 { "ST330013AS", SIL_QUIRK_MOD15WRITE },
142 { "ST340017AS", SIL_QUIRK_MOD15WRITE },
143 { "ST360015AS", SIL_QUIRK_MOD15WRITE },
144 { "ST380023AS", SIL_QUIRK_MOD15WRITE },
145 { "ST3120023AS", SIL_QUIRK_MOD15WRITE },
146 { "ST340014ASL", SIL_QUIRK_MOD15WRITE },
147 { "ST360014ASL", SIL_QUIRK_MOD15WRITE },
148 { "ST380011ASL", SIL_QUIRK_MOD15WRITE },
149 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
150 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
151 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
152 { }
153 };
154
155 static struct pci_driver sil_pci_driver = {
156 .name = DRV_NAME,
157 .id_table = sil_pci_tbl,
158 .probe = sil_init_one,
159 .remove = ata_pci_remove_one,
160 .suspend = ata_pci_device_suspend,
161 .resume = sil_pci_device_resume,
162 };
163
164 static struct scsi_host_template sil_sht = {
165 .module = THIS_MODULE,
166 .name = DRV_NAME,
167 .ioctl = ata_scsi_ioctl,
168 .queuecommand = ata_scsi_queuecmd,
169 .can_queue = ATA_DEF_QUEUE,
170 .this_id = ATA_SHT_THIS_ID,
171 .sg_tablesize = LIBATA_MAX_PRD,
172 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
173 .emulated = ATA_SHT_EMULATED,
174 .use_clustering = ATA_SHT_USE_CLUSTERING,
175 .proc_name = DRV_NAME,
176 .dma_boundary = ATA_DMA_BOUNDARY,
177 .slave_configure = ata_scsi_slave_config,
178 .slave_destroy = ata_scsi_slave_destroy,
179 .bios_param = ata_std_bios_param,
180 .suspend = ata_scsi_device_suspend,
181 .resume = ata_scsi_device_resume,
182 };
183
184 static const struct ata_port_operations sil_ops = {
185 .port_disable = ata_port_disable,
186 .dev_config = sil_dev_config,
187 .tf_load = ata_tf_load,
188 .tf_read = ata_tf_read,
189 .check_status = ata_check_status,
190 .exec_command = ata_exec_command,
191 .dev_select = ata_std_dev_select,
192 .post_set_mode = sil_post_set_mode,
193 .bmdma_setup = ata_bmdma_setup,
194 .bmdma_start = ata_bmdma_start,
195 .bmdma_stop = ata_bmdma_stop,
196 .bmdma_status = ata_bmdma_status,
197 .qc_prep = ata_qc_prep,
198 .qc_issue = ata_qc_issue_prot,
199 .data_xfer = ata_mmio_data_xfer,
200 .freeze = sil_freeze,
201 .thaw = sil_thaw,
202 .error_handler = ata_bmdma_error_handler,
203 .post_internal_cmd = ata_bmdma_post_internal_cmd,
204 .irq_handler = sil_interrupt,
205 .irq_clear = ata_bmdma_irq_clear,
206 .scr_read = sil_scr_read,
207 .scr_write = sil_scr_write,
208 .port_start = ata_port_start,
209 .port_stop = ata_port_stop,
210 .host_stop = ata_pci_host_stop,
211 };
212
213 static const struct ata_port_info sil_port_info[] = {
214 /* sil_3112 */
215 {
216 .sht = &sil_sht,
217 .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_MOD15WRITE,
218 .pio_mask = 0x1f, /* pio0-4 */
219 .mwdma_mask = 0x07, /* mwdma0-2 */
220 .udma_mask = 0x3f, /* udma0-5 */
221 .port_ops = &sil_ops,
222 },
223 /* sil_3112_no_sata_irq */
224 {
225 .sht = &sil_sht,
226 .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_MOD15WRITE |
227 SIL_FLAG_NO_SATA_IRQ,
228 .pio_mask = 0x1f, /* pio0-4 */
229 .mwdma_mask = 0x07, /* mwdma0-2 */
230 .udma_mask = 0x3f, /* udma0-5 */
231 .port_ops = &sil_ops,
232 },
233 /* sil_3512 */
234 {
235 .sht = &sil_sht,
236 .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
237 .pio_mask = 0x1f, /* pio0-4 */
238 .mwdma_mask = 0x07, /* mwdma0-2 */
239 .udma_mask = 0x3f, /* udma0-5 */
240 .port_ops = &sil_ops,
241 },
242 /* sil_3114 */
243 {
244 .sht = &sil_sht,
245 .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
246 .pio_mask = 0x1f, /* pio0-4 */
247 .mwdma_mask = 0x07, /* mwdma0-2 */
248 .udma_mask = 0x3f, /* udma0-5 */
249 .port_ops = &sil_ops,
250 },
251 };
252
253 /* per-port register offsets */
254 /* TODO: we can probably calculate rather than use a table */
255 static const struct {
256 unsigned long tf; /* ATA taskfile register block */
257 unsigned long ctl; /* ATA control/altstatus register block */
258 unsigned long bmdma; /* DMA register block */
259 unsigned long bmdma2; /* DMA register block #2 */
260 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
261 unsigned long scr; /* SATA control register block */
262 unsigned long sien; /* SATA Interrupt Enable register */
263 unsigned long xfer_mode;/* data transfer mode register */
264 unsigned long sfis_cfg; /* SATA FIS reception config register */
265 } sil_port[] = {
266 /* port 0 ... */
267 { 0x80, 0x8A, 0x00, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
268 { 0xC0, 0xCA, 0x08, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
269 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
270 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
271 /* ... port 3 */
272 };
273
274 MODULE_AUTHOR("Jeff Garzik");
275 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
276 MODULE_LICENSE("GPL");
277 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
278 MODULE_VERSION(DRV_VERSION);
279
280 static int slow_down = 0;
281 module_param(slow_down, int, 0444);
282 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
283
284
285 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
286 {
287 u8 cache_line = 0;
288 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
289 return cache_line;
290 }
291
292 static void sil_post_set_mode (struct ata_port *ap)
293 {
294 struct ata_host_set *host_set = ap->host_set;
295 struct ata_device *dev;
296 void __iomem *addr =
297 host_set->mmio_base + sil_port[ap->port_no].xfer_mode;
298 u32 tmp, dev_mode[2];
299 unsigned int i;
300
301 for (i = 0; i < 2; i++) {
302 dev = &ap->device[i];
303 if (!ata_dev_enabled(dev))
304 dev_mode[i] = 0; /* PIO0/1/2 */
305 else if (dev->flags & ATA_DFLAG_PIO)
306 dev_mode[i] = 1; /* PIO3/4 */
307 else
308 dev_mode[i] = 3; /* UDMA */
309 /* value 2 indicates MDMA */
310 }
311
312 tmp = readl(addr);
313 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
314 tmp |= dev_mode[0];
315 tmp |= (dev_mode[1] << 4);
316 writel(tmp, addr);
317 readl(addr); /* flush */
318 }
319
320 static inline unsigned long sil_scr_addr(struct ata_port *ap, unsigned int sc_reg)
321 {
322 unsigned long offset = ap->ioaddr.scr_addr;
323
324 switch (sc_reg) {
325 case SCR_STATUS:
326 return offset + 4;
327 case SCR_ERROR:
328 return offset + 8;
329 case SCR_CONTROL:
330 return offset;
331 default:
332 /* do nothing */
333 break;
334 }
335
336 return 0;
337 }
338
339 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg)
340 {
341 void __iomem *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
342 if (mmio)
343 return readl(mmio);
344 return 0xffffffffU;
345 }
346
347 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
348 {
349 void *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
350 if (mmio)
351 writel(val, mmio);
352 }
353
354 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
355 {
356 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
357 u8 status;
358
359 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
360 u32 serror;
361
362 /* SIEN doesn't mask SATA IRQs on some 3112s. Those
363 * controllers continue to assert IRQ as long as
364 * SError bits are pending. Clear SError immediately.
365 */
366 serror = sil_scr_read(ap, SCR_ERROR);
367 sil_scr_write(ap, SCR_ERROR, serror);
368
369 /* Trigger hotplug and accumulate SError only if the
370 * port isn't already frozen. Otherwise, PHY events
371 * during hardreset makes controllers with broken SIEN
372 * repeat probing needlessly.
373 */
374 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
375 ata_ehi_hotplugged(&ap->eh_info);
376 ap->eh_info.serror |= serror;
377 }
378
379 goto freeze;
380 }
381
382 if (unlikely(!qc || qc->tf.ctl & ATA_NIEN))
383 goto freeze;
384
385 /* Check whether we are expecting interrupt in this state */
386 switch (ap->hsm_task_state) {
387 case HSM_ST_FIRST:
388 /* Some pre-ATAPI-4 devices assert INTRQ
389 * at this state when ready to receive CDB.
390 */
391
392 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
393 * The flag was turned on only for atapi devices.
394 * No need to check is_atapi_taskfile(&qc->tf) again.
395 */
396 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
397 goto err_hsm;
398 break;
399 case HSM_ST_LAST:
400 if (qc->tf.protocol == ATA_PROT_DMA ||
401 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
402 /* clear DMA-Start bit */
403 ap->ops->bmdma_stop(qc);
404
405 if (bmdma2 & SIL_DMA_ERROR) {
406 qc->err_mask |= AC_ERR_HOST_BUS;
407 ap->hsm_task_state = HSM_ST_ERR;
408 }
409 }
410 break;
411 case HSM_ST:
412 break;
413 default:
414 goto err_hsm;
415 }
416
417 /* check main status, clearing INTRQ */
418 status = ata_chk_status(ap);
419 if (unlikely(status & ATA_BUSY))
420 goto err_hsm;
421
422 /* ack bmdma irq events */
423 ata_bmdma_irq_clear(ap);
424
425 /* kick HSM in the ass */
426 ata_hsm_move(ap, qc, status, 0);
427
428 return;
429
430 err_hsm:
431 qc->err_mask |= AC_ERR_HSM;
432 freeze:
433 ata_port_freeze(ap);
434 }
435
436 static irqreturn_t sil_interrupt(int irq, void *dev_instance,
437 struct pt_regs *regs)
438 {
439 struct ata_host_set *host_set = dev_instance;
440 void __iomem *mmio_base = host_set->mmio_base;
441 int handled = 0;
442 int i;
443
444 spin_lock(&host_set->lock);
445
446 for (i = 0; i < host_set->n_ports; i++) {
447 struct ata_port *ap = host_set->ports[i];
448 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
449
450 if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED))
451 continue;
452
453 /* turn off SATA_IRQ if not supported */
454 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
455 bmdma2 &= ~SIL_DMA_SATA_IRQ;
456
457 if (bmdma2 == 0xffffffff ||
458 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
459 continue;
460
461 sil_host_intr(ap, bmdma2);
462 handled = 1;
463 }
464
465 spin_unlock(&host_set->lock);
466
467 return IRQ_RETVAL(handled);
468 }
469
470 static void sil_freeze(struct ata_port *ap)
471 {
472 void __iomem *mmio_base = ap->host_set->mmio_base;
473 u32 tmp;
474
475 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
476 writel(0, mmio_base + sil_port[ap->port_no].sien);
477
478 /* plug IRQ */
479 tmp = readl(mmio_base + SIL_SYSCFG);
480 tmp |= SIL_MASK_IDE0_INT << ap->port_no;
481 writel(tmp, mmio_base + SIL_SYSCFG);
482 readl(mmio_base + SIL_SYSCFG); /* flush */
483 }
484
485 static void sil_thaw(struct ata_port *ap)
486 {
487 void __iomem *mmio_base = ap->host_set->mmio_base;
488 u32 tmp;
489
490 /* clear IRQ */
491 ata_chk_status(ap);
492 ata_bmdma_irq_clear(ap);
493
494 /* turn on SATA IRQ if supported */
495 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
496 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
497
498 /* turn on IRQ */
499 tmp = readl(mmio_base + SIL_SYSCFG);
500 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
501 writel(tmp, mmio_base + SIL_SYSCFG);
502 }
503
504 /**
505 * sil_dev_config - Apply device/host-specific errata fixups
506 * @ap: Port containing device to be examined
507 * @dev: Device to be examined
508 *
509 * After the IDENTIFY [PACKET] DEVICE step is complete, and a
510 * device is known to be present, this function is called.
511 * We apply two errata fixups which are specific to Silicon Image,
512 * a Seagate and a Maxtor fixup.
513 *
514 * For certain Seagate devices, we must limit the maximum sectors
515 * to under 8K.
516 *
517 * For certain Maxtor devices, we must not program the drive
518 * beyond udma5.
519 *
520 * Both fixups are unfairly pessimistic. As soon as I get more
521 * information on these errata, I will create a more exhaustive
522 * list, and apply the fixups to only the specific
523 * devices/hosts/firmwares that need it.
524 *
525 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
526 * The Maxtor quirk is in the blacklist, but I'm keeping the original
527 * pessimistic fix for the following reasons...
528 * - There seems to be less info on it, only one device gleaned off the
529 * Windows driver, maybe only one is affected. More info would be greatly
530 * appreciated.
531 * - But then again UDMA5 is hardly anything to complain about
532 */
533 static void sil_dev_config(struct ata_port *ap, struct ata_device *dev)
534 {
535 unsigned int n, quirks = 0;
536 unsigned char model_num[41];
537
538 ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
539
540 for (n = 0; sil_blacklist[n].product; n++)
541 if (!strcmp(sil_blacklist[n].product, model_num)) {
542 quirks = sil_blacklist[n].quirk;
543 break;
544 }
545
546 /* limit requests to 15 sectors */
547 if (slow_down ||
548 ((ap->flags & SIL_FLAG_MOD15WRITE) &&
549 (quirks & SIL_QUIRK_MOD15WRITE))) {
550 ata_dev_printk(dev, KERN_INFO, "applying Seagate errata fix "
551 "(mod15write workaround)\n");
552 dev->max_sectors = 15;
553 return;
554 }
555
556 /* limit to udma5 */
557 if (quirks & SIL_QUIRK_UDMA5MAX) {
558 ata_dev_printk(dev, KERN_INFO,
559 "applying Maxtor errata fix %s\n", model_num);
560 dev->udma_mask &= ATA_UDMA5;
561 return;
562 }
563 }
564
565 static void sil_init_controller(struct pci_dev *pdev,
566 int n_ports, unsigned long host_flags,
567 void __iomem *mmio_base)
568 {
569 u8 cls;
570 u32 tmp;
571 int i;
572
573 /* Initialize FIFO PCI bus arbitration */
574 cls = sil_get_device_cache_line(pdev);
575 if (cls) {
576 cls >>= 3;
577 cls++; /* cls = (line_size/8)+1 */
578 for (i = 0; i < n_ports; i++)
579 writew(cls << 8 | cls,
580 mmio_base + sil_port[i].fifo_cfg);
581 } else
582 dev_printk(KERN_WARNING, &pdev->dev,
583 "cache line size not set. Driver may not function\n");
584
585 /* Apply R_ERR on DMA activate FIS errata workaround */
586 if (host_flags & SIL_FLAG_RERR_ON_DMA_ACT) {
587 int cnt;
588
589 for (i = 0, cnt = 0; i < n_ports; i++) {
590 tmp = readl(mmio_base + sil_port[i].sfis_cfg);
591 if ((tmp & 0x3) != 0x01)
592 continue;
593 if (!cnt)
594 dev_printk(KERN_INFO, &pdev->dev,
595 "Applying R_ERR on DMA activate "
596 "FIS errata fix\n");
597 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
598 cnt++;
599 }
600 }
601
602 if (n_ports == 4) {
603 /* flip the magic "make 4 ports work" bit */
604 tmp = readl(mmio_base + sil_port[2].bmdma);
605 if ((tmp & SIL_INTR_STEERING) == 0)
606 writel(tmp | SIL_INTR_STEERING,
607 mmio_base + sil_port[2].bmdma);
608 }
609 }
610
611 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
612 {
613 static int printed_version;
614 struct ata_probe_ent *probe_ent = NULL;
615 unsigned long base;
616 void __iomem *mmio_base;
617 int rc;
618 unsigned int i;
619 int pci_dev_busy = 0;
620
621 if (!printed_version++)
622 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
623
624 rc = pci_enable_device(pdev);
625 if (rc)
626 return rc;
627
628 rc = pci_request_regions(pdev, DRV_NAME);
629 if (rc) {
630 pci_dev_busy = 1;
631 goto err_out;
632 }
633
634 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
635 if (rc)
636 goto err_out_regions;
637 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
638 if (rc)
639 goto err_out_regions;
640
641 probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
642 if (probe_ent == NULL) {
643 rc = -ENOMEM;
644 goto err_out_regions;
645 }
646
647 INIT_LIST_HEAD(&probe_ent->node);
648 probe_ent->dev = pci_dev_to_dev(pdev);
649 probe_ent->port_ops = sil_port_info[ent->driver_data].port_ops;
650 probe_ent->sht = sil_port_info[ent->driver_data].sht;
651 probe_ent->n_ports = (ent->driver_data == sil_3114) ? 4 : 2;
652 probe_ent->pio_mask = sil_port_info[ent->driver_data].pio_mask;
653 probe_ent->mwdma_mask = sil_port_info[ent->driver_data].mwdma_mask;
654 probe_ent->udma_mask = sil_port_info[ent->driver_data].udma_mask;
655 probe_ent->irq = pdev->irq;
656 probe_ent->irq_flags = IRQF_SHARED;
657 probe_ent->host_flags = sil_port_info[ent->driver_data].host_flags;
658
659 mmio_base = pci_iomap(pdev, 5, 0);
660 if (mmio_base == NULL) {
661 rc = -ENOMEM;
662 goto err_out_free_ent;
663 }
664
665 probe_ent->mmio_base = mmio_base;
666
667 base = (unsigned long) mmio_base;
668
669 for (i = 0; i < probe_ent->n_ports; i++) {
670 probe_ent->port[i].cmd_addr = base + sil_port[i].tf;
671 probe_ent->port[i].altstatus_addr =
672 probe_ent->port[i].ctl_addr = base + sil_port[i].ctl;
673 probe_ent->port[i].bmdma_addr = base + sil_port[i].bmdma;
674 probe_ent->port[i].scr_addr = base + sil_port[i].scr;
675 ata_std_ports(&probe_ent->port[i]);
676 }
677
678 sil_init_controller(pdev, probe_ent->n_ports, probe_ent->host_flags,
679 mmio_base);
680
681 pci_set_master(pdev);
682
683 /* FIXME: check ata_device_add return value */
684 ata_device_add(probe_ent);
685 kfree(probe_ent);
686
687 return 0;
688
689 err_out_free_ent:
690 kfree(probe_ent);
691 err_out_regions:
692 pci_release_regions(pdev);
693 err_out:
694 if (!pci_dev_busy)
695 pci_disable_device(pdev);
696 return rc;
697 }
698
699 static int sil_pci_device_resume(struct pci_dev *pdev)
700 {
701 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
702
703 ata_pci_device_do_resume(pdev);
704 sil_init_controller(pdev, host_set->n_ports, host_set->ports[0]->flags,
705 host_set->mmio_base);
706 ata_host_set_resume(host_set);
707
708 return 0;
709 }
710
711 static int __init sil_init(void)
712 {
713 return pci_module_init(&sil_pci_driver);
714 }
715
716 static void __exit sil_exit(void)
717 {
718 pci_unregister_driver(&sil_pci_driver);
719 }
720
721
722 module_init(sil_init);
723 module_exit(sil_exit);
Support for the Chinese Samsung S3C2440 based development boards