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[ARM] msm: fix build errors
[linux-2.6/libata-dev.git] / drivers / ata / pata_via.c
blob79a6c9a0b721b5caacb43c9785bebb877d16c9d1
1 /*
2 * pata_via.c - VIA PATA for new ATA layer
3 * (C) 2005-2006 Red Hat Inc
4 *
5 * Documentation
6 * Most chipset documentation available under NDA only
7 *
8 * VIA version guide
9 * VIA VT82C561 - early design, uses ata_generic currently
10 * VIA VT82C576 - MWDMA, 33Mhz
11 * VIA VT82C586 - MWDMA, 33Mhz
12 * VIA VT82C586a - Added UDMA to 33Mhz
13 * VIA VT82C586b - UDMA33
14 * VIA VT82C596a - Nonfunctional UDMA66
15 * VIA VT82C596b - Working UDMA66
16 * VIA VT82C686 - Nonfunctional UDMA66
17 * VIA VT82C686a - Working UDMA66
18 * VIA VT82C686b - Updated to UDMA100
19 * VIA VT8231 - UDMA100
20 * VIA VT8233 - UDMA100
21 * VIA VT8233a - UDMA133
22 * VIA VT8233c - UDMA100
23 * VIA VT8235 - UDMA133
24 * VIA VT8237 - UDMA133
25 * VIA VT8237S - UDMA133
26 * VIA VT8251 - UDMA133
27 *
28 * Most registers remain compatible across chips. Others start reserved
29 * and acquire sensible semantics if set to 1 (eg cable detect). A few
30 * exceptions exist, notably around the FIFO settings.
31 *
32 * One additional quirk of the VIA design is that like ALi they use few
33 * PCI IDs for a lot of chips.
34 *
35 * Based heavily on:
36 *
37 * Version 3.38
38 *
39 * VIA IDE driver for Linux. Supported southbridges:
40 *
41 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
42 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
43 * vt8235, vt8237
44 *
45 * Copyright (c) 2000-2002 Vojtech Pavlik
46 *
47 * Based on the work of:
48 * Michel Aubry
49 * Jeff Garzik
50 * Andre Hedrick
51
52 */
53
54 #include <linux/kernel.h>
55 #include <linux/module.h>
56 #include <linux/pci.h>
57 #include <linux/init.h>
58 #include <linux/blkdev.h>
59 #include <linux/delay.h>
60 #include <scsi/scsi_host.h>
61 #include <linux/libata.h>
62 #include <linux/dmi.h>
63
64 #define DRV_NAME "pata_via"
65 #define DRV_VERSION "0.3.3"
66
67 /*
68 * The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx
69 * driver.
70 */
71
72 enum {
73 VIA_UDMA = 0x007,
74 VIA_UDMA_NONE = 0x000,
75 VIA_UDMA_33 = 0x001,
76 VIA_UDMA_66 = 0x002,
77 VIA_UDMA_100 = 0x003,
78 VIA_UDMA_133 = 0x004,
79 VIA_BAD_PREQ = 0x010, /* Crashes if PREQ# till DDACK# set */
80 VIA_BAD_CLK66 = 0x020, /* 66 MHz clock doesn't work correctly */
81 VIA_SET_FIFO = 0x040, /* Needs to have FIFO split set */
82 VIA_NO_UNMASK = 0x080, /* Doesn't work with IRQ unmasking on */
83 VIA_BAD_ID = 0x100, /* Has wrong vendor ID (0x1107) */
84 VIA_BAD_AST = 0x200, /* Don't touch Address Setup Timing */
85 VIA_NO_ENABLES = 0x400, /* Has no enablebits */
86 VIA_SATA_PATA = 0x800, /* SATA/PATA combined configuration */
87 };
88
89 enum {
90 VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */
91 };
92
93 /*
94 * VIA SouthBridge chips.
95 */
96
97 static const struct via_isa_bridge {
98 const char *name;
99 u16 id;
100 u8 rev_min;
101 u8 rev_max;
102 u16 flags;
103 } via_isa_bridges[] = {
104 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f,
105 VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
106 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 |
107 VIA_BAD_AST | VIA_SATA_PATA },
108 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f,
109 VIA_UDMA_133 | VIA_BAD_AST },
110 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
111 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
112 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
113 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES},
114 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
115 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
116 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
117 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
118 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
119 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
120 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 },
121 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 },
122 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 },
123 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
124 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 },
125 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
126 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
127 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
128 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
129 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
130 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
131 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
132 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
133 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f,
134 VIA_UDMA_133 | VIA_BAD_AST },
135 { NULL }
136 };
137
138
139 /*
140 * Cable special cases
141 */
142
143 static const struct dmi_system_id cable_dmi_table[] = {
144 {
145 .ident = "Acer Ferrari 3400",
146 .matches = {
147 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
148 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
149 },
150 },
151 { }
152 };
153
154 static int via_cable_override(struct pci_dev *pdev)
155 {
156 /* Systems by DMI */
157 if (dmi_check_system(cable_dmi_table))
158 return 1;
159 /* Arima W730-K8/Targa Visionary 811/... */
160 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
161 return 1;
162 return 0;
163 }
164
165
166 /**
167 * via_cable_detect - cable detection
168 * @ap: ATA port
169 *
170 * Perform cable detection. Actually for the VIA case the BIOS
171 * already did this for us. We read the values provided by the
172 * BIOS. If you are using an 8235 in a non-PC configuration you
173 * may need to update this code.
174 *
175 * Hotplug also impacts on this.
176 */
177
178 static int via_cable_detect(struct ata_port *ap) {
179 const struct via_isa_bridge *config = ap->host->private_data;
180 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
181 u32 ata66;
182
183 if (via_cable_override(pdev))
184 return ATA_CBL_PATA40_SHORT;
185
186 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)
187 return ATA_CBL_SATA;
188
189 /* Early chips are 40 wire */
190 if ((config->flags & VIA_UDMA) < VIA_UDMA_66)
191 return ATA_CBL_PATA40;
192 /* UDMA 66 chips have only drive side logic */
193 else if ((config->flags & VIA_UDMA) < VIA_UDMA_100)
194 return ATA_CBL_PATA_UNK;
195 /* UDMA 100 or later */
196 pci_read_config_dword(pdev, 0x50, &ata66);
197 /* Check both the drive cable reporting bits, we might not have
198 two drives */
199 if (ata66 & (0x10100000 >> (16 * ap->port_no)))
200 return ATA_CBL_PATA80;
201 /* Check with ACPI so we can spot BIOS reported SATA bridges */
202 if (ata_acpi_init_gtm(ap) &&
203 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap)))
204 return ATA_CBL_PATA80;
205 return ATA_CBL_PATA40;
206 }
207
208 static int via_pre_reset(struct ata_link *link, unsigned long deadline)
209 {
210 struct ata_port *ap = link->ap;
211 const struct via_isa_bridge *config = ap->host->private_data;
212
213 if (!(config->flags & VIA_NO_ENABLES)) {
214 static const struct pci_bits via_enable_bits[] = {
215 { 0x40, 1, 0x02, 0x02 },
216 { 0x40, 1, 0x01, 0x01 }
217 };
218 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
219 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
220 return -ENOENT;
221 }
222
223 return ata_sff_prereset(link, deadline);
224 }
225
226
227 /**
228 * via_do_set_mode - set initial PIO mode data
229 * @ap: ATA interface
230 * @adev: ATA device
231 * @mode: ATA mode being programmed
232 * @tdiv: Clocks per PCI clock
233 * @set_ast: Set to program address setup
234 * @udma_type: UDMA mode/format of registers
235 *
236 * Program the VIA registers for DMA and PIO modes. Uses the ata timing
237 * support in order to compute modes.
238 *
239 * FIXME: Hotplug will require we serialize multiple mode changes
240 * on the two channels.
241 */
242
243 static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mode, int tdiv, int set_ast, int udma_type)
244 {
245 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
246 struct ata_device *peer = ata_dev_pair(adev);
247 struct ata_timing t, p;
248 static int via_clock = 33333; /* Bus clock in kHZ - ought to be tunable one day */
249 unsigned long T = 1000000000 / via_clock;
250 unsigned long UT = T/tdiv;
251 int ut;
252 int offset = 3 - (2*ap->port_no) - adev->devno;
253
254 /* Calculate the timing values we require */
255 ata_timing_compute(adev, mode, &t, T, UT);
256
257 /* We share 8bit timing so we must merge the constraints */
258 if (peer) {
259 if (peer->pio_mode) {
260 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
261 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
262 }
263 }
264
265 /* Address setup is programmable but breaks on UDMA133 setups */
266 if (set_ast) {
267 u8 setup; /* 2 bits per drive */
268 int shift = 2 * offset;
269
270 pci_read_config_byte(pdev, 0x4C, &setup);
271 setup &= ~(3 << shift);
272 setup |= clamp_val(t.setup, 1, 4) << shift; /* 1,4 or 1,4 - 1 FIXME */
273 pci_write_config_byte(pdev, 0x4C, setup);
274 }
275
276 /* Load the PIO mode bits */
277 pci_write_config_byte(pdev, 0x4F - ap->port_no,
278 ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1));
279 pci_write_config_byte(pdev, 0x48 + offset,
280 ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1));
281
282 /* Load the UDMA bits according to type */
283 switch(udma_type) {
284 default:
285 /* BUG() ? */
286 /* fall through */
287 case 33:
288 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;
289 break;
290 case 66:
291 ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;
292 break;
293 case 100:
294 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
295 break;
296 case 133:
297 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
298 break;
299 }
300
301 /* Set UDMA unless device is not UDMA capable */
302 if (udma_type && t.udma) {
303 u8 cable80_status;
304
305 /* Get 80-wire cable detection bit */
306 pci_read_config_byte(pdev, 0x50 + offset, &cable80_status);
307 cable80_status &= 0x10;
308
309 pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status);
310 }
311 }
312
313 static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
314 {
315 const struct via_isa_bridge *config = ap->host->private_data;
316 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
317 int mode = config->flags & VIA_UDMA;
318 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
319 static u8 udma[5] = { 0, 33, 66, 100, 133 };
320
321 via_do_set_mode(ap, adev, adev->pio_mode, tclock[mode], set_ast, udma[mode]);
322 }
323
324 static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
325 {
326 const struct via_isa_bridge *config = ap->host->private_data;
327 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
328 int mode = config->flags & VIA_UDMA;
329 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
330 static u8 udma[5] = { 0, 33, 66, 100, 133 };
331
332 via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]);
333 }
334
335 /**
336 * via_tf_load - send taskfile registers to host controller
337 * @ap: Port to which output is sent
338 * @tf: ATA taskfile register set
339 *
340 * Outputs ATA taskfile to standard ATA host controller.
341 *
342 * Note: This is to fix the internal bug of via chipsets, which
343 * will reset the device register after changing the IEN bit on
344 * ctl register
345 */
346 static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
347 {
348 struct ata_taskfile tmp_tf;
349
350 if (ap->ctl != ap->last_ctl && !(tf->flags & ATA_TFLAG_DEVICE)) {
351 tmp_tf = *tf;
352 tmp_tf.flags |= ATA_TFLAG_DEVICE;
353 tf = &tmp_tf;
354 }
355 ata_sff_tf_load(ap, tf);
356 }
357
358 static struct scsi_host_template via_sht = {
359 ATA_BMDMA_SHT(DRV_NAME),
360 };
361
362 static struct ata_port_operations via_port_ops = {
363 .inherits = &ata_bmdma_port_ops,
364 .cable_detect = via_cable_detect,
365 .set_piomode = via_set_piomode,
366 .set_dmamode = via_set_dmamode,
367 .prereset = via_pre_reset,
368 .sff_tf_load = via_tf_load,
369 };
370
371 static struct ata_port_operations via_port_ops_noirq = {
372 .inherits = &via_port_ops,
373 .sff_data_xfer = ata_sff_data_xfer_noirq,
374 };
375
376 /**
377 * via_config_fifo - set up the FIFO
378 * @pdev: PCI device
379 * @flags: configuration flags
380 *
381 * Set the FIFO properties for this device if necessary. Used both on
382 * set up and on and the resume path
383 */
384
385 static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
386 {
387 u8 enable;
388
389 /* 0x40 low bits indicate enabled channels */
390 pci_read_config_byte(pdev, 0x40 , &enable);
391 enable &= 3;
392
393 if (flags & VIA_SET_FIFO) {
394 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
395 u8 fifo;
396
397 pci_read_config_byte(pdev, 0x43, &fifo);
398
399 /* Clear PREQ# until DDACK# for errata */
400 if (flags & VIA_BAD_PREQ)
401 fifo &= 0x7F;
402 else
403 fifo &= 0x9f;
404 /* Turn on FIFO for enabled channels */
405 fifo |= fifo_setting[enable];
406 pci_write_config_byte(pdev, 0x43, fifo);
407 }
408 }
409
410 /**
411 * via_init_one - discovery callback
412 * @pdev: PCI device
413 * @id: PCI table info
414 *
415 * A VIA IDE interface has been discovered. Figure out what revision
416 * and perform configuration work before handing it to the ATA layer
417 */
418
419 static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
420 {
421 /* Early VIA without UDMA support */
422 static const struct ata_port_info via_mwdma_info = {
423 .flags = ATA_FLAG_SLAVE_POSS,
424 .pio_mask = 0x1f,
425 .mwdma_mask = 0x07,
426 .port_ops = &via_port_ops
427 };
428 /* Ditto with IRQ masking required */
429 static const struct ata_port_info via_mwdma_info_borked = {
430 .flags = ATA_FLAG_SLAVE_POSS,
431 .pio_mask = 0x1f,
432 .mwdma_mask = 0x07,
433 .port_ops = &via_port_ops_noirq,
434 };
435 /* VIA UDMA 33 devices (and borked 66) */
436 static const struct ata_port_info via_udma33_info = {
437 .flags = ATA_FLAG_SLAVE_POSS,
438 .pio_mask = 0x1f,
439 .mwdma_mask = 0x07,
440 .udma_mask = ATA_UDMA2,
441 .port_ops = &via_port_ops
442 };
443 /* VIA UDMA 66 devices */
444 static const struct ata_port_info via_udma66_info = {
445 .flags = ATA_FLAG_SLAVE_POSS,
446 .pio_mask = 0x1f,
447 .mwdma_mask = 0x07,
448 .udma_mask = ATA_UDMA4,
449 .port_ops = &via_port_ops
450 };
451 /* VIA UDMA 100 devices */
452 static const struct ata_port_info via_udma100_info = {
453 .flags = ATA_FLAG_SLAVE_POSS,
454 .pio_mask = 0x1f,
455 .mwdma_mask = 0x07,
456 .udma_mask = ATA_UDMA5,
457 .port_ops = &via_port_ops
458 };
459 /* UDMA133 with bad AST (All current 133) */
460 static const struct ata_port_info via_udma133_info = {
461 .flags = ATA_FLAG_SLAVE_POSS,
462 .pio_mask = 0x1f,
463 .mwdma_mask = 0x07,
464 .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */
465 .port_ops = &via_port_ops
466 };
467 const struct ata_port_info *ppi[] = { NULL, NULL };
468 struct pci_dev *isa = NULL;
469 const struct via_isa_bridge *config;
470 static int printed_version;
471 u8 enable;
472 u32 timing;
473 unsigned long flags = id->driver_data;
474 int rc;
475
476 if (!printed_version++)
477 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
478
479 rc = pcim_enable_device(pdev);
480 if (rc)
481 return rc;
482
483 if (flags & VIA_IDFLAG_SINGLE)
484 ppi[1] = &ata_dummy_port_info;
485
486 /* To find out how the IDE will behave and what features we
487 actually have to look at the bridge not the IDE controller */
488 for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON;
489 config++)
490 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
491 !!(config->flags & VIA_BAD_ID),
492 config->id, NULL))) {
493
494 if (isa->revision >= config->rev_min &&
495 isa->revision <= config->rev_max)
496 break;
497 pci_dev_put(isa);
498 }
499
500 pci_dev_put(isa);
501
502 if (!(config->flags & VIA_NO_ENABLES)) {
503 /* 0x40 low bits indicate enabled channels */
504 pci_read_config_byte(pdev, 0x40 , &enable);
505 enable &= 3;
506 if (enable == 0)
507 return -ENODEV;
508 }
509
510 /* Initialise the FIFO for the enabled channels. */
511 via_config_fifo(pdev, config->flags);
512
513 /* Clock set up */
514 switch(config->flags & VIA_UDMA) {
515 case VIA_UDMA_NONE:
516 if (config->flags & VIA_NO_UNMASK)
517 ppi[0] = &via_mwdma_info_borked;
518 else
519 ppi[0] = &via_mwdma_info;
520 break;
521 case VIA_UDMA_33:
522 ppi[0] = &via_udma33_info;
523 break;
524 case VIA_UDMA_66:
525 ppi[0] = &via_udma66_info;
526 /* The 66 MHz devices require we enable the clock */
527 pci_read_config_dword(pdev, 0x50, &timing);
528 timing |= 0x80008;
529 pci_write_config_dword(pdev, 0x50, timing);
530 break;
531 case VIA_UDMA_100:
532 ppi[0] = &via_udma100_info;
533 break;
534 case VIA_UDMA_133:
535 ppi[0] = &via_udma133_info;
536 break;
537 default:
538 WARN_ON(1);
539 return -ENODEV;
540 }
541
542 if (config->flags & VIA_BAD_CLK66) {
543 /* Disable the 66MHz clock on problem devices */
544 pci_read_config_dword(pdev, 0x50, &timing);
545 timing &= ~0x80008;
546 pci_write_config_dword(pdev, 0x50, timing);
547 }
548
549 /* We have established the device type, now fire it up */
550 return ata_pci_sff_init_one(pdev, ppi, &via_sht, (void *)config);
551 }
552
553 #ifdef CONFIG_PM
554 /**
555 * via_reinit_one - reinit after resume
556 * @pdev; PCI device
557 *
558 * Called when the VIA PATA device is resumed. We must then
559 * reconfigure the fifo and other setup we may have altered. In
560 * addition the kernel needs to have the resume methods on PCI
561 * quirk supported.
562 */
563
564 static int via_reinit_one(struct pci_dev *pdev)
565 {
566 u32 timing;
567 struct ata_host *host = dev_get_drvdata(&pdev->dev);
568 const struct via_isa_bridge *config = host->private_data;
569 int rc;
570
571 rc = ata_pci_device_do_resume(pdev);
572 if (rc)
573 return rc;
574
575 via_config_fifo(pdev, config->flags);
576
577 if ((config->flags & VIA_UDMA) == VIA_UDMA_66) {
578 /* The 66 MHz devices require we enable the clock */
579 pci_read_config_dword(pdev, 0x50, &timing);
580 timing |= 0x80008;
581 pci_write_config_dword(pdev, 0x50, timing);
582 }
583 if (config->flags & VIA_BAD_CLK66) {
584 /* Disable the 66MHz clock on problem devices */
585 pci_read_config_dword(pdev, 0x50, &timing);
586 timing &= ~0x80008;
587 pci_write_config_dword(pdev, 0x50, timing);
588 }
589
590 ata_host_resume(host);
591 return 0;
592 }
593 #endif
594
595 static const struct pci_device_id via[] = {
596 { PCI_VDEVICE(VIA, 0x0571), },
597 { PCI_VDEVICE(VIA, 0x0581), },
598 { PCI_VDEVICE(VIA, 0x1571), },
599 { PCI_VDEVICE(VIA, 0x3164), },
600 { PCI_VDEVICE(VIA, 0x5324), },
601 { PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE },
602
603 { },
604 };
605
606 static struct pci_driver via_pci_driver = {
607 .name = DRV_NAME,
608 .id_table = via,
609 .probe = via_init_one,
610 .remove = ata_pci_remove_one,
611 #ifdef CONFIG_PM
612 .suspend = ata_pci_device_suspend,
613 .resume = via_reinit_one,
614 #endif
615 };
616
617 static int __init via_init(void)
618 {
619 return pci_register_driver(&via_pci_driver);
620 }
621
622 static void __exit via_exit(void)
623 {
624 pci_unregister_driver(&via_pci_driver);
625 }
626
627 MODULE_AUTHOR("Alan Cox");
628 MODULE_DESCRIPTION("low-level driver for VIA PATA");
629 MODULE_LICENSE("GPL");
630 MODULE_DEVICE_TABLE(pci, via);
631 MODULE_VERSION(DRV_VERSION);
632
633 module_init(via_init);
634 module_exit(via_exit);
Linux 2.6 libata-dev (mirror)