?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / ide / pci / via82cxxx.c
blob6fb6e50b82312131b1b3ac45f29f927c0f6a7e07
1 /*
2 *
3 * Version 3.38
4 *
5 * VIA IDE driver for Linux. Supported southbridges:
6 *
7 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
8 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
9 * vt8235, vt8237, vt8237a
10 *
11 * Copyright (c) 2000-2002 Vojtech Pavlik
12 *
13 * Based on the work of:
14 * Michel Aubry
15 * Jeff Garzik
16 * Andre Hedrick
17 *
18 * Documentation:
19 * Obsolete device documentation publically available from via.com.tw
20 * Current device documentation available under NDA only
21 */
22
23 /*
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License version 2 as published by
26 * the Free Software Foundation.
27 */
28
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/ioport.h>
32 #include <linux/blkdev.h>
33 #include <linux/pci.h>
34 #include <linux/init.h>
35 #include <linux/ide.h>
36 #include <asm/io.h>
37
38 #ifdef CONFIG_PPC_CHRP
39 #include <asm/processor.h>
40 #endif
41
42 #include "ide-timing.h"
43
44 #define DISPLAY_VIA_TIMINGS
45
46 #define VIA_IDE_ENABLE 0x40
47 #define VIA_IDE_CONFIG 0x41
48 #define VIA_FIFO_CONFIG 0x43
49 #define VIA_MISC_1 0x44
50 #define VIA_MISC_2 0x45
51 #define VIA_MISC_3 0x46
52 #define VIA_DRIVE_TIMING 0x48
53 #define VIA_8BIT_TIMING 0x4e
54 #define VIA_ADDRESS_SETUP 0x4c
55 #define VIA_UDMA_TIMING 0x50
56
57 #define VIA_UDMA 0x007
58 #define VIA_UDMA_NONE 0x000
59 #define VIA_UDMA_33 0x001
60 #define VIA_UDMA_66 0x002
61 #define VIA_UDMA_100 0x003
62 #define VIA_UDMA_133 0x004
63 #define VIA_BAD_PREQ 0x010 /* Crashes if PREQ# till DDACK# set */
64 #define VIA_BAD_CLK66 0x020 /* 66 MHz clock doesn't work correctly */
65 #define VIA_SET_FIFO 0x040 /* Needs to have FIFO split set */
66 #define VIA_NO_UNMASK 0x080 /* Doesn't work with IRQ unmasking on */
67 #define VIA_BAD_ID 0x100 /* Has wrong vendor ID (0x1107) */
68 #define VIA_BAD_AST 0x200 /* Don't touch Address Setup Timing */
69
70 /*
71 * VIA SouthBridge chips.
72 */
73
74 static struct via_isa_bridge {
75 char *name;
76 u16 id;
77 u8 rev_min;
78 u8 rev_max;
79 u16 flags;
80 } via_isa_bridges[] = {
81 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
82 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
83 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
84 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
85 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
86 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
87 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
88 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
89 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
90 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
91 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 },
92 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 },
93 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 },
94 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
95 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 },
96 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
97 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
98 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
99 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
100 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
101 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
102 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
103 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
104 { NULL }
105 };
106
107 static unsigned int via_clock;
108 static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" };
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 = hwif->pci_dev;
128 struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
129 u8 t;
130
131 if (~vdev->via_config->flags & VIA_BAD_AST) {
132 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
133 t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
134 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
135 }
136
137 pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
138 ((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
139
140 pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
141 ((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));
142
143 switch (vdev->via_config->flags & VIA_UDMA) {
144 case VIA_UDMA_33: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
145 case VIA_UDMA_66: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break;
146 case VIA_UDMA_100: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
147 case VIA_UDMA_133: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
148 default: return;
149 }
150
151 pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
152 }
153
154 /**
155 * via_set_drive - configure transfer mode
156 * @drive: Drive to set up
157 * @speed: desired speed
158 *
159 * via_set_drive() computes timing values configures the drive and
160 * the chipset to a desired transfer mode. It also can be called
161 * by upper layers.
162 */
163
164 static int via_set_drive(ide_drive_t *drive, u8 speed)
165 {
166 ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
167 struct via82cxxx_dev *vdev = pci_get_drvdata(drive->hwif->pci_dev);
168 struct ide_timing t, p;
169 unsigned int T, UT;
170
171 if (speed != XFER_PIO_SLOW)
172 ide_config_drive_speed(drive, speed);
173
174 T = 1000000000 / via_clock;
175
176 switch (vdev->via_config->flags & VIA_UDMA) {
177 case VIA_UDMA_33: UT = T; break;
178 case VIA_UDMA_66: UT = T/2; break;
179 case VIA_UDMA_100: UT = T/3; break;
180 case VIA_UDMA_133: UT = T/4; break;
181 default: UT = T;
182 }
183
184 ide_timing_compute(drive, speed, &t, T, UT);
185
186 if (peer->present) {
187 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
188 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
189 }
190
191 via_set_speed(HWIF(drive), drive->dn, &t);
192
193 if (!drive->init_speed)
194 drive->init_speed = speed;
195 drive->current_speed = speed;
196
197 return 0;
198 }
199
200 /**
201 * via82cxxx_tune_drive - PIO setup
202 * @drive: drive to set up
203 * @pio: mode to use (255 for 'best possible')
204 *
205 * A callback from the upper layers for PIO-only tuning.
206 */
207
208 static void via82cxxx_tune_drive(ide_drive_t *drive, u8 pio)
209 {
210 if (pio == 255) {
211 via_set_drive(drive,
212 ide_find_best_mode(drive, XFER_PIO | XFER_EPIO));
213 return;
214 }
215
216 via_set_drive(drive, XFER_PIO_0 + min_t(u8, pio, 5));
217 }
218
219 /**
220 * via82cxxx_ide_dma_check - set up for DMA if possible
221 * @drive: IDE drive to set up
222 *
223 * Set up the drive for the highest supported speed considering the
224 * driver, controller and cable
225 */
226
227 static int via82cxxx_ide_dma_check (ide_drive_t *drive)
228 {
229 ide_hwif_t *hwif = HWIF(drive);
230 struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
231 u16 w80 = hwif->udma_four;
232
233 u16 speed = ide_find_best_mode(drive,
234 XFER_PIO | XFER_EPIO | XFER_SWDMA | XFER_MWDMA |
235 (vdev->via_config->flags & VIA_UDMA ? XFER_UDMA : 0) |
236 (w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_66 ? XFER_UDMA_66 : 0) |
237 (w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_100 ? XFER_UDMA_100 : 0) |
238 (w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));
239
240 via_set_drive(drive, speed);
241
242 if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
243 return hwif->ide_dma_on(drive);
244 return hwif->ide_dma_off_quietly(drive);
245 }
246
247 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
248 {
249 struct via_isa_bridge *via_config;
250 u8 t;
251
252 for (via_config = via_isa_bridges; via_config->id; via_config++)
253 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
254 !!(via_config->flags & VIA_BAD_ID),
255 via_config->id, NULL))) {
256
257 pci_read_config_byte(*isa, PCI_REVISION_ID, &t);
258 if (t >= via_config->rev_min &&
259 t <= via_config->rev_max)
260 break;
261 pci_dev_put(*isa);
262 }
263
264 return via_config;
265 }
266
267 /*
268 * Check and handle 80-wire cable presence
269 */
270 static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
271 {
272 int i;
273
274 switch (vdev->via_config->flags & VIA_UDMA) {
275 case VIA_UDMA_66:
276 for (i = 24; i >= 0; i -= 8)
277 if (((u >> (i & 16)) & 8) &&
278 ((u >> i) & 0x20) &&
279 (((u >> i) & 7) < 2)) {
280 /*
281 * 2x PCI clock and
282 * UDMA w/ < 3T/cycle
283 */
284 vdev->via_80w |= (1 << (1 - (i >> 4)));
285 }
286 break;
287
288 case VIA_UDMA_100:
289 for (i = 24; i >= 0; i -= 8)
290 if (((u >> i) & 0x10) ||
291 (((u >> i) & 0x20) &&
292 (((u >> i) & 7) < 4))) {
293 /* BIOS 80-wire bit or
294 * UDMA w/ < 60ns/cycle
295 */
296 vdev->via_80w |= (1 << (1 - (i >> 4)));
297 }
298 break;
299
300 case VIA_UDMA_133:
301 for (i = 24; i >= 0; i -= 8)
302 if (((u >> i) & 0x10) ||
303 (((u >> i) & 0x20) &&
304 (((u >> i) & 7) < 6))) {
305 /* BIOS 80-wire bit or
306 * UDMA w/ < 60ns/cycle
307 */
308 vdev->via_80w |= (1 << (1 - (i >> 4)));
309 }
310 break;
311 }
312 }
313
314 /**
315 * init_chipset_via82cxxx - initialization handler
316 * @dev: PCI device
317 * @name: Name of interface
318 *
319 * The initialization callback. Here we determine the IDE chip type
320 * and initialize its drive independent registers.
321 */
322
323 static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
324 {
325 struct pci_dev *isa = NULL;
326 struct via82cxxx_dev *vdev;
327 struct via_isa_bridge *via_config;
328 u8 t, v;
329 u32 u;
330
331 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
332 if (!vdev) {
333 printk(KERN_ERR "VP_IDE: out of memory :(\n");
334 return -ENOMEM;
335 }
336 pci_set_drvdata(dev, vdev);
337
338 /*
339 * Find the ISA bridge to see how good the IDE is.
340 */
341 vdev->via_config = via_config = via_config_find(&isa);
342
343 /* We checked this earlier so if it fails here deeep badness
344 is involved */
345
346 BUG_ON(!via_config->id);
347
348 /*
349 * Detect cable and configure Clk66
350 */
351 pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
352
353 via_cable_detect(vdev, u);
354
355 if ((via_config->flags & VIA_UDMA) == VIA_UDMA_66) {
356 /* Enable Clk66 */
357 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
358 } else if (via_config->flags & VIA_BAD_CLK66) {
359 /* Would cause trouble on 596a and 686 */
360 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
361 }
362
363 /*
364 * Check whether interfaces are enabled.
365 */
366
367 pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
368
369 /*
370 * Set up FIFO sizes and thresholds.
371 */
372
373 pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
374
375 /* Disable PREQ# till DDACK# */
376 if (via_config->flags & VIA_BAD_PREQ) {
377 /* Would crash on 586b rev 41 */
378 t &= 0x7f;
379 }
380
381 /* Fix FIFO split between channels */
382 if (via_config->flags & VIA_SET_FIFO) {
383 t &= (t & 0x9f);
384 switch (v & 3) {
385 case 2: t |= 0x00; break; /* 16 on primary */
386 case 1: t |= 0x60; break; /* 16 on secondary */
387 case 3: t |= 0x20; break; /* 8 pri 8 sec */
388 }
389 }
390
391 pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
392
393 /*
394 * Determine system bus clock.
395 */
396
397 via_clock = system_bus_clock() * 1000;
398
399 switch (via_clock) {
400 case 33000: via_clock = 33333; break;
401 case 37000: via_clock = 37500; break;
402 case 41000: via_clock = 41666; break;
403 }
404
405 if (via_clock < 20000 || via_clock > 50000) {
406 printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
407 "impossible (%d), using 33 MHz instead.\n", via_clock);
408 printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
409 "to assume 80-wire cable.\n");
410 via_clock = 33333;
411 }
412
413 /*
414 * Print the boot message.
415 */
416
417 pci_read_config_byte(isa, PCI_REVISION_ID, &t);
418 printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %s "
419 "controller on pci%s\n",
420 via_config->name, t,
421 via_dma[via_config->flags & VIA_UDMA],
422 pci_name(dev));
423
424 pci_dev_put(isa);
425 return 0;
426 }
427
428 static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
429 {
430 struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
431 int i;
432
433 hwif->autodma = 0;
434
435 hwif->tuneproc = &via82cxxx_tune_drive;
436 hwif->speedproc = &via_set_drive;
437
438
439 #ifdef CONFIG_PPC_CHRP
440 if(machine_is(chrp) && _chrp_type == _CHRP_Pegasos) {
441 hwif->irq = hwif->channel ? 15 : 14;
442 }
443 #endif
444
445 for (i = 0; i < 2; i++) {
446 hwif->drives[i].io_32bit = 1;
447 hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
448 hwif->drives[i].autotune = 1;
449 hwif->drives[i].dn = hwif->channel * 2 + i;
450 }
451
452 if (!hwif->dma_base)
453 return;
454
455 hwif->atapi_dma = 1;
456 hwif->ultra_mask = 0x7f;
457 hwif->mwdma_mask = 0x07;
458 hwif->swdma_mask = 0x07;
459
460 if (!hwif->udma_four)
461 hwif->udma_four = (vdev->via_80w >> hwif->channel) & 1;
462 hwif->ide_dma_check = &via82cxxx_ide_dma_check;
463 if (!noautodma)
464 hwif->autodma = 1;
465 hwif->drives[0].autodma = hwif->autodma;
466 hwif->drives[1].autodma = hwif->autodma;
467 }
468
469 static ide_pci_device_t via82cxxx_chipsets[] __devinitdata = {
470 { /* 0 */
471 .name = "VP_IDE",
472 .init_chipset = init_chipset_via82cxxx,
473 .init_hwif = init_hwif_via82cxxx,
474 .channels = 2,
475 .autodma = NOAUTODMA,
476 .enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}},
477 .bootable = ON_BOARD
478 },{ /* 1 */
479 .name = "VP_IDE",
480 .init_chipset = init_chipset_via82cxxx,
481 .init_hwif = init_hwif_via82cxxx,
482 .channels = 2,
483 .autodma = AUTODMA,
484 .enablebits = {{0x00,0x00,0x00}, {0x00,0x00,0x00}},
485 .bootable = ON_BOARD,
486 }
487 };
488
489 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
490 {
491 struct pci_dev *isa = NULL;
492 struct via_isa_bridge *via_config;
493 /*
494 * Find the ISA bridge and check we know what it is.
495 */
496 via_config = via_config_find(&isa);
497 pci_dev_put(isa);
498 if (!via_config->id) {
499 printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
500 return -ENODEV;
501 }
502 return ide_setup_pci_device(dev, &via82cxxx_chipsets[id->driver_data]);
503 }
504
505 static struct pci_device_id via_pci_tbl[] = {
506 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
507 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
508 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_6410, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
509 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_SATA_EIDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
510 { 0, },
511 };
512 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
513
514 static struct pci_driver driver = {
515 .name = "VIA_IDE",
516 .id_table = via_pci_tbl,
517 .probe = via_init_one,
518 };
519
520 static int __init via_ide_init(void)
521 {
522 return ide_pci_register_driver(&driver);
523 }
524
525 module_init(via_ide_init);
526
527 MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
528 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
529 MODULE_LICENSE("GPL");
Linux with added FPC-III support