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Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck...
[linux-2.6.git] / drivers / ide / via82cxxx.c
blob01464f1e233998cbb18b72e62513f353f4653eec
1 /*
2 * VIA IDE driver for Linux. Supported southbridges:
3 *
4 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
5 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
6 * vt8235, vt8237, vt8237a
7 *
8 * Copyright (c) 2000-2002 Vojtech Pavlik
9 * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
10 *
11 * Based on the work of:
12 * Michel Aubry
13 * Jeff Garzik
14 * Andre Hedrick
15 *
16 * Documentation:
17 * Obsolete device documentation publicly available from via.com.tw
18 * Current device documentation available under NDA only
19 */
20
21 /*
22 * This program is free software; you can redistribute it and/or modify it
23 * under the terms of the GNU General Public License version 2 as published by
24 * the Free Software Foundation.
25 */
26
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/ide.h>
33 #include <linux/dmi.h>
34
35 #ifdef CONFIG_PPC_CHRP
36 #include <asm/processor.h>
37 #endif
38
39 #define DRV_NAME "via82cxxx"
40
41 #define VIA_IDE_ENABLE 0x40
42 #define VIA_IDE_CONFIG 0x41
43 #define VIA_FIFO_CONFIG 0x43
44 #define VIA_MISC_1 0x44
45 #define VIA_MISC_2 0x45
46 #define VIA_MISC_3 0x46
47 #define VIA_DRIVE_TIMING 0x48
48 #define VIA_8BIT_TIMING 0x4e
49 #define VIA_ADDRESS_SETUP 0x4c
50 #define VIA_UDMA_TIMING 0x50
51
52 #define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */
53 #define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */
54 #define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */
55 #define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */
56 #define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */
57 #define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */
58 #define VIA_SATA_PATA 0x80 /* SATA/PATA combined configuration */
59
60 enum {
61 VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
62 };
63
64 /*
65 * VIA SouthBridge chips.
66 */
67
68 static struct via_isa_bridge {
69 char *name;
70 u16 id;
71 u8 rev_min;
72 u8 rev_max;
73 u8 udma_mask;
74 u8 flags;
75 } via_isa_bridges[] = {
76 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
77 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
78 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
79 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
80 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
81 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
82 { "vt6415", PCI_DEVICE_ID_VIA_6415, 0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
83 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
84 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
85 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
86 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
87 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
88 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
89 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
90 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
91 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
92 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
93 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
94 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
95 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
96 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
97 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
98 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
99 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
100 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
101 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
102 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
103 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
104 { NULL }
105 };
106
107 static unsigned int via_clock;
108 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
109
110 struct via82cxxx_dev
111 {
112 struct via_isa_bridge *via_config;
113 unsigned int via_80w;
114 };
115
116 /**
117 * via_set_speed - write timing registers
118 * @dev: PCI device
119 * @dn: device
120 * @timing: IDE timing data to use
121 *
122 * via_set_speed writes timing values to the chipset registers
123 */
124
125 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
126 {
127 struct pci_dev *dev = to_pci_dev(hwif->dev);
128 struct ide_host *host = pci_get_drvdata(dev);
129 struct via82cxxx_dev *vdev = host->host_priv;
130 u8 t;
131
132 if (~vdev->via_config->flags & VIA_BAD_AST) {
133 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
134 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
135 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
136 }
137
138 pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
139 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
140
141 pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
142 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
143
144 switch (vdev->via_config->udma_mask) {
145 case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
146 case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
147 case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
148 case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
149 }
150
151 /* Set UDMA unless device is not UDMA capable */
152 if (vdev->via_config->udma_mask) {
153 u8 udma_etc;
154
155 pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);
156
157 /* clear transfer mode bit */
158 udma_etc &= ~0x20;
159
160 if (timing->udma) {
161 /* preserve 80-wire cable detection bit */
162 udma_etc &= 0x10;
163 udma_etc |= t;
164 }
165
166 pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);
167 }
168 }
169
170 /**
171 * via_set_drive - configure transfer mode
172 * @hwif: port
173 * @drive: Drive to set up
174 *
175 * via_set_drive() computes timing values configures the chipset to
176 * a desired transfer mode. It also can be called by upper layers.
177 */
178
179 static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
180 {
181 ide_drive_t *peer = ide_get_pair_dev(drive);
182 struct pci_dev *dev = to_pci_dev(hwif->dev);
183 struct ide_host *host = pci_get_drvdata(dev);
184 struct via82cxxx_dev *vdev = host->host_priv;
185 struct ide_timing t, p;
186 unsigned int T, UT;
187 const u8 speed = drive->dma_mode;
188
189 T = 1000000000 / via_clock;
190
191 switch (vdev->via_config->udma_mask) {
192 case ATA_UDMA2: UT = T; break;
193 case ATA_UDMA4: UT = T/2; break;
194 case ATA_UDMA5: UT = T/3; break;
195 case ATA_UDMA6: UT = T/4; break;
196 default: UT = T;
197 }
198
199 ide_timing_compute(drive, speed, &t, T, UT);
200
201 if (peer) {
202 ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
203 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
204 }
205
206 via_set_speed(hwif, drive->dn, &t);
207 }
208
209 /**
210 * via_set_pio_mode - set host controller for PIO mode
211 * @hwif: port
212 * @drive: drive
213 *
214 * A callback from the upper layers for PIO-only tuning.
215 */
216
217 static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
218 {
219 drive->dma_mode = drive->pio_mode;
220 via_set_drive(hwif, drive);
221 }
222
223 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
224 {
225 struct via_isa_bridge *via_config;
226
227 for (via_config = via_isa_bridges;
228 via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)
229 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
230 !!(via_config->flags & VIA_BAD_ID),
231 via_config->id, NULL))) {
232
233 if ((*isa)->revision >= via_config->rev_min &&
234 (*isa)->revision <= via_config->rev_max)
235 break;
236 pci_dev_put(*isa);
237 }
238
239 return via_config;
240 }
241
242 /*
243 * Check and handle 80-wire cable presence
244 */
245 static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
246 {
247 int i;
248
249 switch (vdev->via_config->udma_mask) {
250 case ATA_UDMA4:
251 for (i = 24; i >= 0; i -= 8)
252 if (((u >> (i & 16)) & 8) &&
253 ((u >> i) & 0x20) &&
254 (((u >> i) & 7) < 2)) {
255 /*
256 * 2x PCI clock and
257 * UDMA w/ < 3T/cycle
258 */
259 vdev->via_80w |= (1 << (1 - (i >> 4)));
260 }
261 break;
262
263 case ATA_UDMA5:
264 for (i = 24; i >= 0; i -= 8)
265 if (((u >> i) & 0x10) ||
266 (((u >> i) & 0x20) &&
267 (((u >> i) & 7) < 4))) {
268 /* BIOS 80-wire bit or
269 * UDMA w/ < 60ns/cycle
270 */
271 vdev->via_80w |= (1 << (1 - (i >> 4)));
272 }
273 break;
274
275 case ATA_UDMA6:
276 for (i = 24; i >= 0; i -= 8)
277 if (((u >> i) & 0x10) ||
278 (((u >> i) & 0x20) &&
279 (((u >> i) & 7) < 6))) {
280 /* BIOS 80-wire bit or
281 * UDMA w/ < 60ns/cycle
282 */
283 vdev->via_80w |= (1 << (1 - (i >> 4)));
284 }
285 break;
286 }
287 }
288
289 /**
290 * init_chipset_via82cxxx - initialization handler
291 * @dev: PCI device
292 *
293 * The initialization callback. Here we determine the IDE chip type
294 * and initialize its drive independent registers.
295 */
296
297 static int init_chipset_via82cxxx(struct pci_dev *dev)
298 {
299 struct ide_host *host = pci_get_drvdata(dev);
300 struct via82cxxx_dev *vdev = host->host_priv;
301 struct via_isa_bridge *via_config = vdev->via_config;
302 u8 t, v;
303 u32 u;
304
305 /*
306 * Detect cable and configure Clk66
307 */
308 pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
309
310 via_cable_detect(vdev, u);
311
312 if (via_config->udma_mask == ATA_UDMA4) {
313 /* Enable Clk66 */
314 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
315 } else if (via_config->flags & VIA_BAD_CLK66) {
316 /* Would cause trouble on 596a and 686 */
317 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
318 }
319
320 /*
321 * Check whether interfaces are enabled.
322 */
323
324 pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
325
326 /*
327 * Set up FIFO sizes and thresholds.
328 */
329
330 pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
331
332 /* Disable PREQ# till DDACK# */
333 if (via_config->flags & VIA_BAD_PREQ) {
334 /* Would crash on 586b rev 41 */
335 t &= 0x7f;
336 }
337
338 /* Fix FIFO split between channels */
339 if (via_config->flags & VIA_SET_FIFO) {
340 t &= (t & 0x9f);
341 switch (v & 3) {
342 case 2: t |= 0x00; break; /* 16 on primary */
343 case 1: t |= 0x60; break; /* 16 on secondary */
344 case 3: t |= 0x20; break; /* 8 pri 8 sec */
345 }
346 }
347
348 pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
349
350 return 0;
351 }
352
353 /*
354 * Cable special cases
355 */
356
357 static const struct dmi_system_id cable_dmi_table[] = {
358 {
359 .ident = "Acer Ferrari 3400",
360 .matches = {
361 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
362 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
363 },
364 },
365 { }
366 };
367
368 static int via_cable_override(struct pci_dev *pdev)
369 {
370 /* Systems by DMI */
371 if (dmi_check_system(cable_dmi_table))
372 return 1;
373
374 /* Arima W730-K8/Targa Visionary 811/... */
375 if (pdev->subsystem_vendor == 0x161F &&
376 pdev->subsystem_device == 0x2032)
377 return 1;
378
379 return 0;
380 }
381
382 static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
383 {
384 struct pci_dev *pdev = to_pci_dev(hwif->dev);
385 struct ide_host *host = pci_get_drvdata(pdev);
386 struct via82cxxx_dev *vdev = host->host_priv;
387
388 if (via_cable_override(pdev))
389 return ATA_CBL_PATA40_SHORT;
390
391 if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)
392 return ATA_CBL_SATA;
393
394 if ((vdev->via_80w >> hwif->channel) & 1)
395 return ATA_CBL_PATA80;
396 else
397 return ATA_CBL_PATA40;
398 }
399
400 static const struct ide_port_ops via_port_ops = {
401 .set_pio_mode = via_set_pio_mode,
402 .set_dma_mode = via_set_drive,
403 .cable_detect = via82cxxx_cable_detect,
404 };
405
406 static const struct ide_port_info via82cxxx_chipset = {
407 .name = DRV_NAME,
408 .init_chipset = init_chipset_via82cxxx,
409 .enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
410 .port_ops = &via_port_ops,
411 .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST |
412 IDE_HFLAG_POST_SET_MODE |
413 IDE_HFLAG_IO_32BIT,
414 .pio_mask = ATA_PIO5,
415 .swdma_mask = ATA_SWDMA2,
416 .mwdma_mask = ATA_MWDMA2,
417 };
418
419 static int via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
420 {
421 struct pci_dev *isa = NULL;
422 struct via_isa_bridge *via_config;
423 struct via82cxxx_dev *vdev;
424 int rc;
425 u8 idx = id->driver_data;
426 struct ide_port_info d;
427
428 d = via82cxxx_chipset;
429
430 /*
431 * Find the ISA bridge and check we know what it is.
432 */
433 via_config = via_config_find(&isa);
434
435 /*
436 * Print the boot message.
437 */
438 printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
439 pci_name(dev), via_config->name, isa->revision,
440 via_config->udma_mask ? "U" : "MW",
441 via_dma[via_config->udma_mask ?
442 (fls(via_config->udma_mask) - 1) : 0]);
443
444 pci_dev_put(isa);
445
446 /*
447 * Determine system bus clock.
448 */
449 via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
450
451 switch (via_clock) {
452 case 33000: via_clock = 33333; break;
453 case 37000: via_clock = 37500; break;
454 case 41000: via_clock = 41666; break;
455 }
456
457 if (via_clock < 20000 || via_clock > 50000) {
458 printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
459 "impossible (%d), using 33 MHz instead.\n", via_clock);
460 via_clock = 33333;
461 }
462
463 if (idx == 1)
464 d.enablebits[1].reg = d.enablebits[0].reg = 0;
465 else
466 d.host_flags |= IDE_HFLAG_NO_AUTODMA;
467
468 if (idx == VIA_IDFLAG_SINGLE)
469 d.host_flags |= IDE_HFLAG_SINGLE;
470
471 if ((via_config->flags & VIA_NO_UNMASK) == 0)
472 d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
473
474 d.udma_mask = via_config->udma_mask;
475
476 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
477 if (!vdev) {
478 printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
479 pci_name(dev));
480 return -ENOMEM;
481 }
482
483 vdev->via_config = via_config;
484
485 rc = ide_pci_init_one(dev, &d, vdev);
486 if (rc)
487 kfree(vdev);
488
489 return rc;
490 }
491
492 static void via_remove(struct pci_dev *dev)
493 {
494 struct ide_host *host = pci_get_drvdata(dev);
495 struct via82cxxx_dev *vdev = host->host_priv;
496
497 ide_pci_remove(dev);
498 kfree(vdev);
499 }
500
501 static const struct pci_device_id via_pci_tbl[] = {
502 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 },
503 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 },
504 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
505 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE },
506 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 },
507 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415), 1 },
508 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
509 { 0, },
510 };
511 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
512
513 static struct pci_driver via_pci_driver = {
514 .name = "VIA_IDE",
515 .id_table = via_pci_tbl,
516 .probe = via_init_one,
517 .remove = via_remove,
518 .suspend = ide_pci_suspend,
519 .resume = ide_pci_resume,
520 };
521
522 static int __init via_ide_init(void)
523 {
524 return ide_pci_register_driver(&via_pci_driver);
525 }
526
527 static void __exit via_ide_exit(void)
528 {
529 pci_unregister_driver(&via_pci_driver);
530 }
531
532 module_init(via_ide_init);
533 module_exit(via_ide_exit);
534
535 MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick");
536 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
537 MODULE_LICENSE("GPL");
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