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[TCP]: TCP_CONG_YEAH requires TCP_CONG_VEGAS
[linux-2.6/verdex.git] / drivers / ata / sata_via.c
blobd105d2c189d26547b7098bf88fb5e3ce72809745
1 /*
2 * sata_via.c - VIA Serial ATA controllers
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
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 * Hardware documentation available under NDA.
31 *
32 *
33 * To-do list:
34 * - VT6421 PATA support
35 *
36 */
37
38 #include <linux/kernel.h>
39 #include <linux/module.h>
40 #include <linux/pci.h>
41 #include <linux/init.h>
42 #include <linux/blkdev.h>
43 #include <linux/delay.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <linux/libata.h>
47
48 #define DRV_NAME "sata_via"
49 #define DRV_VERSION "2.1"
50
51 enum board_ids_enum {
52 vt6420,
53 vt6421,
54 };
55
56 enum {
57 SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
58 SATA_INT_GATE = 0x41, /* SATA interrupt gating */
59 SATA_NATIVE_MODE = 0x42, /* Native mode enable */
60 SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */
61 PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */
62 PATA_PIO_TIMING = 0xAB, /* PATA timing register */
63
64 PORT0 = (1 << 1),
65 PORT1 = (1 << 0),
66 ALL_PORTS = PORT0 | PORT1,
67
68 NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
69
70 SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
71 SATA_2DEV = (1 << 5), /* SATA is master/slave */
72 };
73
74 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
75 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
76 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
77 static void svia_noop_freeze(struct ata_port *ap);
78 static void vt6420_error_handler(struct ata_port *ap);
79 static int vt6421_pata_cable_detect(struct ata_port *ap);
80 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
81 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
82
83 static const struct pci_device_id svia_pci_tbl[] = {
84 { PCI_VDEVICE(VIA, 0x5337), vt6420 },
85 { PCI_VDEVICE(VIA, 0x0591), vt6420 },
86 { PCI_VDEVICE(VIA, 0x3149), vt6420 },
87 { PCI_VDEVICE(VIA, 0x3249), vt6421 },
88
89 { } /* terminate list */
90 };
91
92 static struct pci_driver svia_pci_driver = {
93 .name = DRV_NAME,
94 .id_table = svia_pci_tbl,
95 .probe = svia_init_one,
96 #ifdef CONFIG_PM
97 .suspend = ata_pci_device_suspend,
98 .resume = ata_pci_device_resume,
99 #endif
100 .remove = ata_pci_remove_one,
101 };
102
103 static struct scsi_host_template svia_sht = {
104 .module = THIS_MODULE,
105 .name = DRV_NAME,
106 .ioctl = ata_scsi_ioctl,
107 .queuecommand = ata_scsi_queuecmd,
108 .can_queue = ATA_DEF_QUEUE,
109 .this_id = ATA_SHT_THIS_ID,
110 .sg_tablesize = LIBATA_MAX_PRD,
111 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
112 .emulated = ATA_SHT_EMULATED,
113 .use_clustering = ATA_SHT_USE_CLUSTERING,
114 .proc_name = DRV_NAME,
115 .dma_boundary = ATA_DMA_BOUNDARY,
116 .slave_configure = ata_scsi_slave_config,
117 .slave_destroy = ata_scsi_slave_destroy,
118 .bios_param = ata_std_bios_param,
119 };
120
121 static const struct ata_port_operations vt6420_sata_ops = {
122 .port_disable = ata_port_disable,
123
124 .tf_load = ata_tf_load,
125 .tf_read = ata_tf_read,
126 .check_status = ata_check_status,
127 .exec_command = ata_exec_command,
128 .dev_select = ata_std_dev_select,
129
130 .bmdma_setup = ata_bmdma_setup,
131 .bmdma_start = ata_bmdma_start,
132 .bmdma_stop = ata_bmdma_stop,
133 .bmdma_status = ata_bmdma_status,
134
135 .qc_prep = ata_qc_prep,
136 .qc_issue = ata_qc_issue_prot,
137 .data_xfer = ata_data_xfer,
138
139 .freeze = svia_noop_freeze,
140 .thaw = ata_bmdma_thaw,
141 .error_handler = vt6420_error_handler,
142 .post_internal_cmd = ata_bmdma_post_internal_cmd,
143
144 .irq_clear = ata_bmdma_irq_clear,
145 .irq_on = ata_irq_on,
146 .irq_ack = ata_irq_ack,
147
148 .port_start = ata_port_start,
149 };
150
151 static const struct ata_port_operations vt6421_pata_ops = {
152 .port_disable = ata_port_disable,
153
154 .set_piomode = vt6421_set_pio_mode,
155 .set_dmamode = vt6421_set_dma_mode,
156
157 .tf_load = ata_tf_load,
158 .tf_read = ata_tf_read,
159 .check_status = ata_check_status,
160 .exec_command = ata_exec_command,
161 .dev_select = ata_std_dev_select,
162
163 .bmdma_setup = ata_bmdma_setup,
164 .bmdma_start = ata_bmdma_start,
165 .bmdma_stop = ata_bmdma_stop,
166 .bmdma_status = ata_bmdma_status,
167
168 .qc_prep = ata_qc_prep,
169 .qc_issue = ata_qc_issue_prot,
170 .data_xfer = ata_data_xfer,
171
172 .freeze = ata_bmdma_freeze,
173 .thaw = ata_bmdma_thaw,
174 .error_handler = ata_bmdma_error_handler,
175 .post_internal_cmd = ata_bmdma_post_internal_cmd,
176 .cable_detect = vt6421_pata_cable_detect,
177
178 .irq_clear = ata_bmdma_irq_clear,
179 .irq_on = ata_irq_on,
180 .irq_ack = ata_irq_ack,
181
182 .port_start = ata_port_start,
183 };
184
185 static const struct ata_port_operations vt6421_sata_ops = {
186 .port_disable = ata_port_disable,
187
188 .tf_load = ata_tf_load,
189 .tf_read = ata_tf_read,
190 .check_status = ata_check_status,
191 .exec_command = ata_exec_command,
192 .dev_select = ata_std_dev_select,
193
194 .bmdma_setup = ata_bmdma_setup,
195 .bmdma_start = ata_bmdma_start,
196 .bmdma_stop = ata_bmdma_stop,
197 .bmdma_status = ata_bmdma_status,
198
199 .qc_prep = ata_qc_prep,
200 .qc_issue = ata_qc_issue_prot,
201 .data_xfer = ata_data_xfer,
202
203 .freeze = ata_bmdma_freeze,
204 .thaw = ata_bmdma_thaw,
205 .error_handler = ata_bmdma_error_handler,
206 .post_internal_cmd = ata_bmdma_post_internal_cmd,
207 .cable_detect = ata_cable_sata,
208
209 .irq_clear = ata_bmdma_irq_clear,
210 .irq_on = ata_irq_on,
211 .irq_ack = ata_irq_ack,
212
213 .scr_read = svia_scr_read,
214 .scr_write = svia_scr_write,
215
216 .port_start = ata_port_start,
217 };
218
219 static const struct ata_port_info vt6420_port_info = {
220 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
221 .pio_mask = 0x1f,
222 .mwdma_mask = 0x07,
223 .udma_mask = 0x7f,
224 .port_ops = &vt6420_sata_ops,
225 };
226
227 static struct ata_port_info vt6421_sport_info = {
228 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
229 .pio_mask = 0x1f,
230 .mwdma_mask = 0x07,
231 .udma_mask = 0x7f,
232 .port_ops = &vt6421_sata_ops,
233 };
234
235 static struct ata_port_info vt6421_pport_info = {
236 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY,
237 .pio_mask = 0x1f,
238 .mwdma_mask = 0,
239 .udma_mask = 0x7f,
240 .port_ops = &vt6421_pata_ops,
241 };
242
243 MODULE_AUTHOR("Jeff Garzik");
244 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
245 MODULE_LICENSE("GPL");
246 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
247 MODULE_VERSION(DRV_VERSION);
248
249 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
250 {
251 if (sc_reg > SCR_CONTROL)
252 return 0xffffffffU;
253 return ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
254 }
255
256 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
257 {
258 if (sc_reg > SCR_CONTROL)
259 return;
260 iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg));
261 }
262
263 static void svia_noop_freeze(struct ata_port *ap)
264 {
265 /* Some VIA controllers choke if ATA_NIEN is manipulated in
266 * certain way. Leave it alone and just clear pending IRQ.
267 */
268 ata_chk_status(ap);
269 ata_bmdma_irq_clear(ap);
270 }
271
272 /**
273 * vt6420_prereset - prereset for vt6420
274 * @ap: target ATA port
275 * @deadline: deadline jiffies for the operation
276 *
277 * SCR registers on vt6420 are pieces of shit and may hang the
278 * whole machine completely if accessed with the wrong timing.
279 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
280 * access operations, but uses SStatus and SControl only during
281 * boot probing in controlled way.
282 *
283 * As the old (pre EH update) probing code is proven to work, we
284 * strictly follow the access pattern.
285 *
286 * LOCKING:
287 * Kernel thread context (may sleep)
288 *
289 * RETURNS:
290 * 0 on success, -errno otherwise.
291 */
292 static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
293 {
294 struct ata_eh_context *ehc = &ap->eh_context;
295 unsigned long timeout = jiffies + (HZ * 5);
296 u32 sstatus, scontrol;
297 int online;
298
299 /* don't do any SCR stuff if we're not loading */
300 if (!(ap->pflags & ATA_PFLAG_LOADING))
301 goto skip_scr;
302
303 /* Resume phy. This is the old resume sequence from
304 * __sata_phy_reset().
305 */
306 svia_scr_write(ap, SCR_CONTROL, 0x300);
307 svia_scr_read(ap, SCR_CONTROL); /* flush */
308
309 /* wait for phy to become ready, if necessary */
310 do {
311 msleep(200);
312 if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
313 break;
314 } while (time_before(jiffies, timeout));
315
316 /* open code sata_print_link_status() */
317 sstatus = svia_scr_read(ap, SCR_STATUS);
318 scontrol = svia_scr_read(ap, SCR_CONTROL);
319
320 online = (sstatus & 0xf) == 0x3;
321
322 ata_port_printk(ap, KERN_INFO,
323 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
324 online ? "up" : "down", sstatus, scontrol);
325
326 /* SStatus is read one more time */
327 svia_scr_read(ap, SCR_STATUS);
328
329 if (!online) {
330 /* tell EH to bail */
331 ehc->i.action &= ~ATA_EH_RESET_MASK;
332 return 0;
333 }
334
335 skip_scr:
336 /* wait for !BSY */
337 ata_wait_ready(ap, deadline);
338
339 return 0;
340 }
341
342 static void vt6420_error_handler(struct ata_port *ap)
343 {
344 return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
345 NULL, ata_std_postreset);
346 }
347
348 static int vt6421_pata_cable_detect(struct ata_port *ap)
349 {
350 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
351 u8 tmp;
352
353 pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
354 if (tmp & 0x10)
355 return ATA_CBL_PATA40;
356 return ATA_CBL_PATA80;
357 }
358
359 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
360 {
361 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
362 static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
363 pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
364 }
365
366 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
367 {
368 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
369 static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
370 pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
371 }
372
373 static const unsigned int svia_bar_sizes[] = {
374 8, 4, 8, 4, 16, 256
375 };
376
377 static const unsigned int vt6421_bar_sizes[] = {
378 16, 16, 16, 16, 32, 128
379 };
380
381 static void __iomem * svia_scr_addr(void __iomem *addr, unsigned int port)
382 {
383 return addr + (port * 128);
384 }
385
386 static void __iomem * vt6421_scr_addr(void __iomem *addr, unsigned int port)
387 {
388 return addr + (port * 64);
389 }
390
391 static void vt6421_init_addrs(struct ata_port *ap)
392 {
393 void __iomem * const * iomap = ap->host->iomap;
394 void __iomem *reg_addr = iomap[ap->port_no];
395 void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
396 struct ata_ioports *ioaddr = &ap->ioaddr;
397
398 ioaddr->cmd_addr = reg_addr;
399 ioaddr->altstatus_addr =
400 ioaddr->ctl_addr = (void __iomem *)
401 ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
402 ioaddr->bmdma_addr = bmdma_addr;
403 ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
404
405 ata_std_ports(ioaddr);
406 }
407
408 static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
409 {
410 const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
411 struct ata_host *host;
412 int rc;
413
414 rc = ata_pci_prepare_native_host(pdev, ppi, &host);
415 if (rc)
416 return rc;
417 *r_host = host;
418
419 rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
420 if (rc) {
421 dev_printk(KERN_ERR, &pdev->dev, "failed to iomap PCI BAR 5\n");
422 return rc;
423 }
424
425 host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
426 host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);
427
428 return 0;
429 }
430
431 static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
432 {
433 const struct ata_port_info *ppi[] =
434 { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
435 struct ata_host *host;
436 int i, rc;
437
438 *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
439 if (!host) {
440 dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
441 return -ENOMEM;
442 }
443
444 rc = pcim_iomap_regions(pdev, 0x1f, DRV_NAME);
445 if (rc) {
446 dev_printk(KERN_ERR, &pdev->dev, "failed to request/iomap "
447 "PCI BARs (errno=%d)\n", rc);
448 return rc;
449 }
450 host->iomap = pcim_iomap_table(pdev);
451
452 for (i = 0; i < host->n_ports; i++)
453 vt6421_init_addrs(host->ports[i]);
454
455 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
456 if (rc)
457 return rc;
458 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
459 if (rc)
460 return rc;
461
462 return 0;
463 }
464
465 static void svia_configure(struct pci_dev *pdev)
466 {
467 u8 tmp8;
468
469 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
470 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
471 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
472
473 /* make sure SATA channels are enabled */
474 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
475 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
476 dev_printk(KERN_DEBUG, &pdev->dev,
477 "enabling SATA channels (0x%x)\n",
478 (int) tmp8);
479 tmp8 |= ALL_PORTS;
480 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
481 }
482
483 /* make sure interrupts for each channel sent to us */
484 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
485 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
486 dev_printk(KERN_DEBUG, &pdev->dev,
487 "enabling SATA channel interrupts (0x%x)\n",
488 (int) tmp8);
489 tmp8 |= ALL_PORTS;
490 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
491 }
492
493 /* make sure native mode is enabled */
494 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
495 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
496 dev_printk(KERN_DEBUG, &pdev->dev,
497 "enabling SATA channel native mode (0x%x)\n",
498 (int) tmp8);
499 tmp8 |= NATIVE_MODE_ALL;
500 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
501 }
502 }
503
504 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
505 {
506 static int printed_version;
507 unsigned int i;
508 int rc;
509 struct ata_host *host;
510 int board_id = (int) ent->driver_data;
511 const int *bar_sizes;
512 u8 tmp8;
513
514 if (!printed_version++)
515 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
516
517 rc = pcim_enable_device(pdev);
518 if (rc)
519 return rc;
520
521 if (board_id == vt6420) {
522 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
523 if (tmp8 & SATA_2DEV) {
524 dev_printk(KERN_ERR, &pdev->dev,
525 "SATA master/slave not supported (0x%x)\n",
526 (int) tmp8);
527 return -EIO;
528 }
529
530 bar_sizes = &svia_bar_sizes[0];
531 } else {
532 bar_sizes = &vt6421_bar_sizes[0];
533 }
534
535 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
536 if ((pci_resource_start(pdev, i) == 0) ||
537 (pci_resource_len(pdev, i) < bar_sizes[i])) {
538 dev_printk(KERN_ERR, &pdev->dev,
539 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
540 i,
541 (unsigned long long)pci_resource_start(pdev, i),
542 (unsigned long long)pci_resource_len(pdev, i));
543 return -ENODEV;
544 }
545
546 if (board_id == vt6420)
547 rc = vt6420_prepare_host(pdev, &host);
548 else
549 rc = vt6421_prepare_host(pdev, &host);
550 if (rc)
551 return rc;
552
553 svia_configure(pdev);
554
555 pci_set_master(pdev);
556 return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
557 &svia_sht);
558 }
559
560 static int __init svia_init(void)
561 {
562 return pci_register_driver(&svia_pci_driver);
563 }
564
565 static void __exit svia_exit(void)
566 {
567 pci_unregister_driver(&svia_pci_driver);
568 }
569
570 module_init(svia_init);
571 module_exit(svia_exit);
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