blob: 0219419cae97878dfcbb56edfefcb10bd2519a00 [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_via.c - VIA PATA for new ATA layer
3 * (C) 2005-2006 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * Documentation
7 * Most chipset documentation available under NDA only
8 *
9 * VIA version guide
10 * VIA VT82C561 - early design, uses ata_generic currently
11 * VIA VT82C576 - MWDMA, 33Mhz
12 * VIA VT82C586 - MWDMA, 33Mhz
13 * VIA VT82C586a - Added UDMA to 33Mhz
14 * VIA VT82C586b - UDMA33
15 * VIA VT82C596a - Nonfunctional UDMA66
16 * VIA VT82C596b - Working UDMA66
17 * VIA VT82C686 - Nonfunctional UDMA66
18 * VIA VT82C686a - Working UDMA66
19 * VIA VT82C686b - Updated to UDMA100
20 * VIA VT8231 - UDMA100
21 * VIA VT8233 - UDMA100
22 * VIA VT8233a - UDMA133
23 * VIA VT8233c - UDMA100
24 * VIA VT8235 - UDMA133
25 * VIA VT8237 - UDMA133
Alan75f609d2006-12-04 16:38:25 +000026 * VIA VT8251 - UDMA133
Jeff Garzik669a5db2006-08-29 18:12:40 -040027 *
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
63#define DRV_NAME "pata_via"
Alan627d2d32006-11-27 16:19:36 +000064#define DRV_VERSION "0.2.0"
Jeff Garzik669a5db2006-08-29 18:12:40 -040065
66/*
67 * The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx
68 * driver.
69 */
70
71enum {
72 VIA_UDMA = 0x007,
73 VIA_UDMA_NONE = 0x000,
74 VIA_UDMA_33 = 0x001,
75 VIA_UDMA_66 = 0x002,
76 VIA_UDMA_100 = 0x003,
77 VIA_UDMA_133 = 0x004,
78 VIA_BAD_PREQ = 0x010, /* Crashes if PREQ# till DDACK# set */
79 VIA_BAD_CLK66 = 0x020, /* 66 MHz clock doesn't work correctly */
80 VIA_SET_FIFO = 0x040, /* Needs to have FIFO split set */
81 VIA_NO_UNMASK = 0x080, /* Doesn't work with IRQ unmasking on */
82 VIA_BAD_ID = 0x100, /* Has wrong vendor ID (0x1107) */
83 VIA_BAD_AST = 0x200, /* Don't touch Address Setup Timing */
84 VIA_NO_ENABLES = 0x400, /* Has no enablebits */
85};
86
87/*
88 * VIA SouthBridge chips.
89 */
90
91static const struct via_isa_bridge {
92 const char *name;
93 u16 id;
94 u8 rev_min;
95 u8 rev_max;
96 u16 flags;
97} via_isa_bridges[] = {
Josepch Chane0b874d2007-01-27 13:47:08 +010098 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Alan75f609d2006-12-04 16:38:25 +000099 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400100 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
101 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES},
102 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
103 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
104 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
105 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
106 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
107 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
108 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 },
109 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 },
110 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 },
111 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
112 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 },
113 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
114 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
115 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
116 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
117 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
118 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
119 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
120 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
121 { NULL }
122};
123
124/**
125 * via_cable_detect - cable detection
126 * @ap: ATA port
127 *
128 * Perform cable detection. Actually for the VIA case the BIOS
129 * already did this for us. We read the values provided by the
130 * BIOS. If you are using an 8235 in a non-PC configuration you
131 * may need to update this code.
132 *
133 * Hotplug also impacts on this.
134 */
135
136static int via_cable_detect(struct ata_port *ap) {
137 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
138 u32 ata66;
139
140 pci_read_config_dword(pdev, 0x50, &ata66);
141 /* Check both the drive cable reporting bits, we might not have
142 two drives */
143 if (ata66 & (0x10100000 >> (16 * ap->port_no)))
144 return ATA_CBL_PATA80;
145 else
146 return ATA_CBL_PATA40;
147}
148
149static int via_pre_reset(struct ata_port *ap)
150{
151 const struct via_isa_bridge *config = ap->host->private_data;
152
153 if (!(config->flags & VIA_NO_ENABLES)) {
154 static const struct pci_bits via_enable_bits[] = {
155 { 0x40, 1, 0x02, 0x02 },
156 { 0x40, 1, 0x01, 0x01 }
157 };
158
159 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400160
Alan Coxc9619222006-09-26 17:53:38 +0100161 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
162 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400163 }
164
Alan5c9a7612006-12-16 14:32:21 +0000165 if ((config->flags & VIA_UDMA) >= VIA_UDMA_100)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400166 ap->cbl = via_cable_detect(ap);
Alan5c9a7612006-12-16 14:32:21 +0000167 /* The UDMA66 series has no cable detect so do drive side detect */
168 else if ((config->flags & VIA_UDMA) < VIA_UDMA_66)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400169 ap->cbl = ATA_CBL_PATA40;
Alan5c9a7612006-12-16 14:32:21 +0000170 else
171 ap->cbl = ATA_CBL_PATA_UNK;
172
173
Jeff Garzik669a5db2006-08-29 18:12:40 -0400174 return ata_std_prereset(ap);
175}
176
177
178/**
179 * via_error_handler - reset for VIA chips
180 * @ap: ATA port
181 *
182 * Handle the reset callback for the later chips with cable detect
183 */
184
185static void via_error_handler(struct ata_port *ap)
186{
187 ata_bmdma_drive_eh(ap, via_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
188}
189
190/**
191 * via_do_set_mode - set initial PIO mode data
192 * @ap: ATA interface
193 * @adev: ATA device
194 * @mode: ATA mode being programmed
195 * @tdiv: Clocks per PCI clock
196 * @set_ast: Set to program address setup
197 * @udma_type: UDMA mode/format of registers
198 *
199 * Program the VIA registers for DMA and PIO modes. Uses the ata timing
200 * support in order to compute modes.
201 *
202 * FIXME: Hotplug will require we serialize multiple mode changes
203 * on the two channels.
204 */
205
206static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mode, int tdiv, int set_ast, int udma_type)
207{
208 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
209 struct ata_device *peer = ata_dev_pair(adev);
210 struct ata_timing t, p;
211 static int via_clock = 33333; /* Bus clock in kHZ - ought to be tunable one day */
212 unsigned long T = 1000000000 / via_clock;
213 unsigned long UT = T/tdiv;
214 int ut;
215 int offset = 3 - (2*ap->port_no) - adev->devno;
216
217
218 /* Calculate the timing values we require */
219 ata_timing_compute(adev, mode, &t, T, UT);
220
221 /* We share 8bit timing so we must merge the constraints */
222 if (peer) {
223 if (peer->pio_mode) {
224 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
225 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
226 }
227 }
228
229 /* Address setup is programmable but breaks on UDMA133 setups */
230 if (set_ast) {
231 u8 setup; /* 2 bits per drive */
232 int shift = 2 * offset;
233
234 pci_read_config_byte(pdev, 0x4C, &setup);
235 setup &= ~(3 << shift);
236 setup |= FIT(t.setup, 1, 4) << shift; /* 1,4 or 1,4 - 1 FIXME */
237 pci_write_config_byte(pdev, 0x4C, setup);
238 }
239
240 /* Load the PIO mode bits */
241 pci_write_config_byte(pdev, 0x4F - ap->port_no,
242 ((FIT(t.act8b, 1, 16) - 1) << 4) | (FIT(t.rec8b, 1, 16) - 1));
243 pci_write_config_byte(pdev, 0x48 + offset,
244 ((FIT(t.active, 1, 16) - 1) << 4) | (FIT(t.recover, 1, 16) - 1));
245
246 /* Load the UDMA bits according to type */
247 switch(udma_type) {
248 default:
249 /* BUG() ? */
250 /* fall through */
251 case 33:
252 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 5) - 2)) : 0x03;
253 break;
254 case 66:
255 ut = t.udma ? (0xe8 | (FIT(t.udma, 2, 9) - 2)) : 0x0f;
256 break;
257 case 100:
258 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 9) - 2)) : 0x07;
259 break;
260 case 133:
261 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 9) - 2)) : 0x07;
262 break;
263 }
264 /* Set UDMA unless device is not UDMA capable */
265 if (udma_type)
266 pci_write_config_byte(pdev, 0x50 + offset, ut);
267}
268
269static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
270{
271 const struct via_isa_bridge *config = ap->host->private_data;
272 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
273 int mode = config->flags & VIA_UDMA;
274 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
275 static u8 udma[5] = { 0, 33, 66, 100, 133 };
276
277 via_do_set_mode(ap, adev, adev->pio_mode, tclock[mode], set_ast, udma[mode]);
278}
279
280static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
281{
282 const struct via_isa_bridge *config = ap->host->private_data;
283 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
284 int mode = config->flags & VIA_UDMA;
285 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
286 static u8 udma[5] = { 0, 33, 66, 100, 133 };
287
288 via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]);
289}
290
291static struct scsi_host_template via_sht = {
292 .module = THIS_MODULE,
293 .name = DRV_NAME,
294 .ioctl = ata_scsi_ioctl,
295 .queuecommand = ata_scsi_queuecmd,
296 .can_queue = ATA_DEF_QUEUE,
297 .this_id = ATA_SHT_THIS_ID,
298 .sg_tablesize = LIBATA_MAX_PRD,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400299 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
300 .emulated = ATA_SHT_EMULATED,
301 .use_clustering = ATA_SHT_USE_CLUSTERING,
302 .proc_name = DRV_NAME,
303 .dma_boundary = ATA_DMA_BOUNDARY,
304 .slave_configure = ata_scsi_slave_config,
Tejun Heoafdfe892006-11-29 11:26:47 +0900305 .slave_destroy = ata_scsi_slave_destroy,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400306 .bios_param = ata_std_bios_param,
Alan627d2d32006-11-27 16:19:36 +0000307 .resume = ata_scsi_device_resume,
308 .suspend = ata_scsi_device_suspend,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400309};
310
311static struct ata_port_operations via_port_ops = {
312 .port_disable = ata_port_disable,
313 .set_piomode = via_set_piomode,
314 .set_dmamode = via_set_dmamode,
315 .mode_filter = ata_pci_default_filter,
316
317 .tf_load = ata_tf_load,
318 .tf_read = ata_tf_read,
319 .check_status = ata_check_status,
320 .exec_command = ata_exec_command,
321 .dev_select = ata_std_dev_select,
322
323 .freeze = ata_bmdma_freeze,
324 .thaw = ata_bmdma_thaw,
325 .error_handler = via_error_handler,
326 .post_internal_cmd = ata_bmdma_post_internal_cmd,
327
328 .bmdma_setup = ata_bmdma_setup,
329 .bmdma_start = ata_bmdma_start,
330 .bmdma_stop = ata_bmdma_stop,
331 .bmdma_status = ata_bmdma_status,
332
333 .qc_prep = ata_qc_prep,
334 .qc_issue = ata_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400335
Jeff Garzik669a5db2006-08-29 18:12:40 -0400336 .data_xfer = ata_pio_data_xfer,
337
338 .irq_handler = ata_interrupt,
339 .irq_clear = ata_bmdma_irq_clear,
340
341 .port_start = ata_port_start,
342 .port_stop = ata_port_stop,
343 .host_stop = ata_host_stop
344};
345
346static struct ata_port_operations via_port_ops_noirq = {
347 .port_disable = ata_port_disable,
348 .set_piomode = via_set_piomode,
349 .set_dmamode = via_set_dmamode,
350 .mode_filter = ata_pci_default_filter,
351
352 .tf_load = ata_tf_load,
353 .tf_read = ata_tf_read,
354 .check_status = ata_check_status,
355 .exec_command = ata_exec_command,
356 .dev_select = ata_std_dev_select,
357
358 .freeze = ata_bmdma_freeze,
359 .thaw = ata_bmdma_thaw,
360 .error_handler = via_error_handler,
361 .post_internal_cmd = ata_bmdma_post_internal_cmd,
362
363 .bmdma_setup = ata_bmdma_setup,
364 .bmdma_start = ata_bmdma_start,
365 .bmdma_stop = ata_bmdma_stop,
366 .bmdma_status = ata_bmdma_status,
367
368 .qc_prep = ata_qc_prep,
369 .qc_issue = ata_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400370
Jeff Garzik669a5db2006-08-29 18:12:40 -0400371 .data_xfer = ata_pio_data_xfer_noirq,
372
373 .irq_handler = ata_interrupt,
374 .irq_clear = ata_bmdma_irq_clear,
375
376 .port_start = ata_port_start,
377 .port_stop = ata_port_stop,
378 .host_stop = ata_host_stop
379};
380
381/**
Alan627d2d32006-11-27 16:19:36 +0000382 * via_config_fifo - set up the FIFO
383 * @pdev: PCI device
384 * @flags: configuration flags
385 *
386 * Set the FIFO properties for this device if neccessary. Used both on
387 * set up and on and the resume path
388 */
389
390static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
391{
392 u8 enable;
393
394 /* 0x40 low bits indicate enabled channels */
395 pci_read_config_byte(pdev, 0x40 , &enable);
396 enable &= 3;
397
398 if (flags & VIA_SET_FIFO) {
Andrew Morton73720862006-12-20 13:09:10 -0500399 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
Alan627d2d32006-11-27 16:19:36 +0000400 u8 fifo;
401
402 pci_read_config_byte(pdev, 0x43, &fifo);
403
404 /* Clear PREQ# until DDACK# for errata */
405 if (flags & VIA_BAD_PREQ)
406 fifo &= 0x7F;
407 else
408 fifo &= 0x9f;
409 /* Turn on FIFO for enabled channels */
410 fifo |= fifo_setting[enable];
411 pci_write_config_byte(pdev, 0x43, fifo);
412 }
413}
414
415/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400416 * via_init_one - discovery callback
Alan627d2d32006-11-27 16:19:36 +0000417 * @pdev: PCI device
Jeff Garzik669a5db2006-08-29 18:12:40 -0400418 * @id: PCI table info
419 *
420 * A VIA IDE interface has been discovered. Figure out what revision
421 * and perform configuration work before handing it to the ATA layer
422 */
423
424static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
425{
426 /* Early VIA without UDMA support */
427 static struct ata_port_info via_mwdma_info = {
428 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900429 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400430 .pio_mask = 0x1f,
431 .mwdma_mask = 0x07,
432 .port_ops = &via_port_ops
433 };
434 /* Ditto with IRQ masking required */
435 static struct ata_port_info via_mwdma_info_borked = {
436 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900437 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400438 .pio_mask = 0x1f,
439 .mwdma_mask = 0x07,
440 .port_ops = &via_port_ops_noirq,
441 };
442 /* VIA UDMA 33 devices (and borked 66) */
443 static struct ata_port_info via_udma33_info = {
444 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900445 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400446 .pio_mask = 0x1f,
447 .mwdma_mask = 0x07,
448 .udma_mask = 0x7,
449 .port_ops = &via_port_ops
450 };
451 /* VIA UDMA 66 devices */
452 static struct ata_port_info via_udma66_info = {
453 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900454 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400455 .pio_mask = 0x1f,
456 .mwdma_mask = 0x07,
457 .udma_mask = 0x1f,
458 .port_ops = &via_port_ops
459 };
460 /* VIA UDMA 100 devices */
461 static struct ata_port_info via_udma100_info = {
462 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900463 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400464 .pio_mask = 0x1f,
465 .mwdma_mask = 0x07,
466 .udma_mask = 0x3f,
467 .port_ops = &via_port_ops
468 };
469 /* UDMA133 with bad AST (All current 133) */
470 static struct ata_port_info via_udma133_info = {
471 .sht = &via_sht,
Tejun Heo3d3cca32006-11-16 10:50:50 +0900472 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400473 .pio_mask = 0x1f,
474 .mwdma_mask = 0x07,
475 .udma_mask = 0x7f, /* FIXME: should check north bridge */
476 .port_ops = &via_port_ops
477 };
478 struct ata_port_info *port_info[2], *type;
479 struct pci_dev *isa = NULL;
480 const struct via_isa_bridge *config;
481 static int printed_version;
482 u8 t;
483 u8 enable;
484 u32 timing;
485
486 if (!printed_version++)
487 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
488
489 /* To find out how the IDE will behave and what features we
490 actually have to look at the bridge not the IDE controller */
491 for (config = via_isa_bridges; config->id; config++)
492 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
493 !!(config->flags & VIA_BAD_ID),
494 config->id, NULL))) {
495
496 pci_read_config_byte(isa, PCI_REVISION_ID, &t);
497 if (t >= config->rev_min &&
498 t <= config->rev_max)
499 break;
500 pci_dev_put(isa);
501 }
502
503 if (!config->id) {
504 printk(KERN_WARNING "via: Unknown VIA SouthBridge, disabling.\n");
505 return -ENODEV;
506 }
507 pci_dev_put(isa);
508
509 /* 0x40 low bits indicate enabled channels */
510 pci_read_config_byte(pdev, 0x40 , &enable);
511 enable &= 3;
512 if (enable == 0) {
513 return -ENODEV;
514 }
515
516 /* Initialise the FIFO for the enabled channels. */
Alan627d2d32006-11-27 16:19:36 +0000517 via_config_fifo(pdev, config->flags);
518
Jeff Garzik669a5db2006-08-29 18:12:40 -0400519 /* Clock set up */
520 switch(config->flags & VIA_UDMA) {
521 case VIA_UDMA_NONE:
522 if (config->flags & VIA_NO_UNMASK)
523 type = &via_mwdma_info_borked;
524 else
525 type = &via_mwdma_info;
526 break;
527 case VIA_UDMA_33:
528 type = &via_udma33_info;
529 break;
530 case VIA_UDMA_66:
531 type = &via_udma66_info;
532 /* The 66 MHz devices require we enable the clock */
533 pci_read_config_dword(pdev, 0x50, &timing);
534 timing |= 0x80008;
535 pci_write_config_dword(pdev, 0x50, timing);
536 break;
537 case VIA_UDMA_100:
538 type = &via_udma100_info;
539 break;
540 case VIA_UDMA_133:
541 type = &via_udma133_info;
542 break;
543 default:
544 WARN_ON(1);
545 return -ENODEV;
546 }
547
548 if (config->flags & VIA_BAD_CLK66) {
549 /* Disable the 66MHz clock on problem devices */
550 pci_read_config_dword(pdev, 0x50, &timing);
551 timing &= ~0x80008;
552 pci_write_config_dword(pdev, 0x50, timing);
553 }
554
555 /* We have established the device type, now fire it up */
556 type->private_data = (void *)config;
557
558 port_info[0] = port_info[1] = type;
559 return ata_pci_init_one(pdev, port_info, 2);
560}
561
Alan627d2d32006-11-27 16:19:36 +0000562/**
563 * via_reinit_one - reinit after resume
564 * @pdev; PCI device
565 *
566 * Called when the VIA PATA device is resumed. We must then
567 * reconfigure the fifo and other setup we may have altered. In
568 * addition the kernel needs to have the resume methods on PCI
569 * quirk supported.
570 */
571
572static int via_reinit_one(struct pci_dev *pdev)
573{
574 u32 timing;
575 struct ata_host *host = dev_get_drvdata(&pdev->dev);
576 const struct via_isa_bridge *config = host->private_data;
577
578 via_config_fifo(pdev, config->flags);
579
580 if ((config->flags & VIA_UDMA) == VIA_UDMA_66) {
581 /* The 66 MHz devices require we enable the clock */
582 pci_read_config_dword(pdev, 0x50, &timing);
583 timing |= 0x80008;
584 pci_write_config_dword(pdev, 0x50, timing);
585 }
586 if (config->flags & VIA_BAD_CLK66) {
587 /* Disable the 66MHz clock on problem devices */
588 pci_read_config_dword(pdev, 0x50, &timing);
589 timing &= ~0x80008;
590 pci_write_config_dword(pdev, 0x50, timing);
591 }
592 return ata_pci_device_resume(pdev);
593}
594
Jeff Garzik669a5db2006-08-29 18:12:40 -0400595static const struct pci_device_id via[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400596 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), },
597 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), },
598 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), },
599 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), },
600
601 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400602};
603
604static struct pci_driver via_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400605 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400606 .id_table = via,
607 .probe = via_init_one,
Alan627d2d32006-11-27 16:19:36 +0000608 .remove = ata_pci_remove_one,
609 .suspend = ata_pci_device_suspend,
610 .resume = via_reinit_one,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400611};
612
613static int __init via_init(void)
614{
615 return pci_register_driver(&via_pci_driver);
616}
617
Jeff Garzik669a5db2006-08-29 18:12:40 -0400618static void __exit via_exit(void)
619{
620 pci_unregister_driver(&via_pci_driver);
621}
622
Jeff Garzik669a5db2006-08-29 18:12:40 -0400623MODULE_AUTHOR("Alan Cox");
624MODULE_DESCRIPTION("low-level driver for VIA PATA");
625MODULE_LICENSE("GPL");
626MODULE_DEVICE_TABLE(pci, via);
627MODULE_VERSION(DRV_VERSION);
628
629module_init(via_init);
630module_exit(via_exit);