blob: d4840748fb5c902cfdd15bee9ee9c3b39081914d [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
Alan05c39e52007-01-31 17:14:38 +000026 * VIA VT8237S - UDMA133
Alan75f609d2006-12-04 16:38:25 +000027 * VIA VT8251 - UDMA133
Jeff Garzik669a5db2006-08-29 18:12:40 -040028 *
29 * Most registers remain compatible across chips. Others start reserved
30 * and acquire sensible semantics if set to 1 (eg cable detect). A few
31 * exceptions exist, notably around the FIFO settings.
32 *
33 * One additional quirk of the VIA design is that like ALi they use few
34 * PCI IDs for a lot of chips.
35 *
36 * Based heavily on:
37 *
38 * Version 3.38
39 *
40 * VIA IDE driver for Linux. Supported southbridges:
41 *
42 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
43 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
44 * vt8235, vt8237
45 *
46 * Copyright (c) 2000-2002 Vojtech Pavlik
47 *
48 * Based on the work of:
49 * Michel Aubry
50 * Jeff Garzik
51 * Andre Hedrick
52
53 */
54
55#include <linux/kernel.h>
56#include <linux/module.h>
57#include <linux/pci.h>
58#include <linux/init.h>
59#include <linux/blkdev.h>
60#include <linux/delay.h>
61#include <scsi/scsi_host.h>
62#include <linux/libata.h>
Alan Coxcf5792d2007-05-23 22:39:01 +010063#include <linux/dmi.h>
Jeff Garzik669a5db2006-08-29 18:12:40 -040064
65#define DRV_NAME "pata_via"
Bartlomiej Zolnierkiewicz943547a2007-12-02 03:47:01 +010066#define DRV_VERSION "0.3.3"
Jeff Garzik669a5db2006-08-29 18:12:40 -040067
68/*
69 * The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx
70 * driver.
71 */
72
73enum {
74 VIA_UDMA = 0x007,
75 VIA_UDMA_NONE = 0x000,
76 VIA_UDMA_33 = 0x001,
77 VIA_UDMA_66 = 0x002,
78 VIA_UDMA_100 = 0x003,
79 VIA_UDMA_133 = 0x004,
80 VIA_BAD_PREQ = 0x010, /* Crashes if PREQ# till DDACK# set */
81 VIA_BAD_CLK66 = 0x020, /* 66 MHz clock doesn't work correctly */
82 VIA_SET_FIFO = 0x040, /* Needs to have FIFO split set */
83 VIA_NO_UNMASK = 0x080, /* Doesn't work with IRQ unmasking on */
84 VIA_BAD_ID = 0x100, /* Has wrong vendor ID (0x1107) */
85 VIA_BAD_AST = 0x200, /* Don't touch Address Setup Timing */
86 VIA_NO_ENABLES = 0x400, /* Has no enablebits */
Tejun Heo7585eb12008-02-07 10:18:53 +090087 VIA_SATA_PATA = 0x800, /* SATA/PATA combined configuration */
Jeff Garzik669a5db2006-08-29 18:12:40 -040088};
89
90/*
91 * VIA SouthBridge chips.
92 */
93
94static const struct via_isa_bridge {
95 const char *name;
96 u16 id;
97 u8 rev_min;
98 u8 rev_max;
99 u16 flags;
100} via_isa_bridges[] = {
Joseph Chanb311ec42007-09-10 22:06:01 -0400101 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Josepch Chane0b874d2007-01-27 13:47:08 +0100102 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Alan75f609d2006-12-04 16:38:25 +0000103 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Tejun Heo7585eb12008-02-07 10:18:53 +0900104 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400105 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES},
106 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
107 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
108 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
109 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
110 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
111 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
112 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 },
113 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 },
114 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 },
115 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
116 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 },
117 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
118 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
119 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
120 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
121 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
122 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
123 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
124 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
125 { NULL }
126};
127
Alan Coxcf5792d2007-05-23 22:39:01 +0100128
129/*
130 * Cable special cases
131 */
132
Jeff Garzik18552562007-10-03 15:15:40 -0400133static const struct dmi_system_id cable_dmi_table[] = {
Alan Coxcf5792d2007-05-23 22:39:01 +0100134 {
135 .ident = "Acer Ferrari 3400",
136 .matches = {
137 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
138 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
139 },
140 },
141 { }
142};
143
144static int via_cable_override(struct pci_dev *pdev)
145{
146 /* Systems by DMI */
147 if (dmi_check_system(cable_dmi_table))
148 return 1;
Alan Cox9edbdbe2007-08-22 22:57:48 +0100149 /* Arima W730-K8/Targa Visionary 811/... */
150 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
151 return 1;
Alan Coxcf5792d2007-05-23 22:39:01 +0100152 return 0;
153}
154
155
Jeff Garzik669a5db2006-08-29 18:12:40 -0400156/**
157 * via_cable_detect - cable detection
158 * @ap: ATA port
159 *
160 * Perform cable detection. Actually for the VIA case the BIOS
161 * already did this for us. We read the values provided by the
162 * BIOS. If you are using an 8235 in a non-PC configuration you
163 * may need to update this code.
164 *
165 * Hotplug also impacts on this.
166 */
167
168static int via_cable_detect(struct ata_port *ap) {
Alan Cox97cb81c2007-03-07 16:56:54 +0000169 const struct via_isa_bridge *config = ap->host->private_data;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400170 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
171 u32 ata66;
172
Alan Coxcf5792d2007-05-23 22:39:01 +0100173 if (via_cable_override(pdev))
174 return ATA_CBL_PATA40_SHORT;
175
Tejun Heo7585eb12008-02-07 10:18:53 +0900176 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)
177 return ATA_CBL_SATA;
178
Alan Cox97cb81c2007-03-07 16:56:54 +0000179 /* Early chips are 40 wire */
180 if ((config->flags & VIA_UDMA) < VIA_UDMA_66)
181 return ATA_CBL_PATA40;
182 /* UDMA 66 chips have only drive side logic */
Jeff Garzikb4479162007-10-25 20:47:30 -0400183 else if ((config->flags & VIA_UDMA) < VIA_UDMA_100)
Alan Cox97cb81c2007-03-07 16:56:54 +0000184 return ATA_CBL_PATA_UNK;
185 /* UDMA 100 or later */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400186 pci_read_config_dword(pdev, 0x50, &ata66);
187 /* Check both the drive cable reporting bits, we might not have
188 two drives */
189 if (ata66 & (0x10100000 >> (16 * ap->port_no)))
190 return ATA_CBL_PATA80;
Alan Cox7d73a362007-07-26 18:38:06 +0100191 /* Check with ACPI so we can spot BIOS reported SATA bridges */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900192 if (ata_acpi_init_gtm(ap) &&
193 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap)))
Alan Cox7d73a362007-07-26 18:38:06 +0100194 return ATA_CBL_PATA80;
Alan Cox97cb81c2007-03-07 16:56:54 +0000195 return ATA_CBL_PATA40;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400196}
197
Tejun Heocc0680a2007-08-06 18:36:23 +0900198static int via_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400199{
Tejun Heocc0680a2007-08-06 18:36:23 +0900200 struct ata_port *ap = link->ap;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400201 const struct via_isa_bridge *config = ap->host->private_data;
202
203 if (!(config->flags & VIA_NO_ENABLES)) {
204 static const struct pci_bits via_enable_bits[] = {
205 { 0x40, 1, 0x02, 0x02 },
206 { 0x40, 1, 0x01, 0x01 }
207 };
Jeff Garzik669a5db2006-08-29 18:12:40 -0400208 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Alan Coxc9619222006-09-26 17:53:38 +0100209 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
210 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400211 }
Tejun Heod4b2bab2007-02-02 16:50:52 +0900212
Tejun Heo9363c382008-04-07 22:47:16 +0900213 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400214}
215
216
217/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400218 * via_do_set_mode - set initial PIO mode data
219 * @ap: ATA interface
220 * @adev: ATA device
221 * @mode: ATA mode being programmed
222 * @tdiv: Clocks per PCI clock
223 * @set_ast: Set to program address setup
224 * @udma_type: UDMA mode/format of registers
225 *
226 * Program the VIA registers for DMA and PIO modes. Uses the ata timing
227 * support in order to compute modes.
228 *
229 * FIXME: Hotplug will require we serialize multiple mode changes
230 * on the two channels.
231 */
232
233static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mode, int tdiv, int set_ast, int udma_type)
234{
235 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
236 struct ata_device *peer = ata_dev_pair(adev);
237 struct ata_timing t, p;
238 static int via_clock = 33333; /* Bus clock in kHZ - ought to be tunable one day */
239 unsigned long T = 1000000000 / via_clock;
240 unsigned long UT = T/tdiv;
241 int ut;
242 int offset = 3 - (2*ap->port_no) - adev->devno;
243
Jeff Garzik669a5db2006-08-29 18:12:40 -0400244 /* Calculate the timing values we require */
245 ata_timing_compute(adev, mode, &t, T, UT);
246
247 /* We share 8bit timing so we must merge the constraints */
248 if (peer) {
249 if (peer->pio_mode) {
250 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
251 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
252 }
253 }
254
255 /* Address setup is programmable but breaks on UDMA133 setups */
256 if (set_ast) {
257 u8 setup; /* 2 bits per drive */
258 int shift = 2 * offset;
259
260 pci_read_config_byte(pdev, 0x4C, &setup);
261 setup &= ~(3 << shift);
262 setup |= FIT(t.setup, 1, 4) << shift; /* 1,4 or 1,4 - 1 FIXME */
263 pci_write_config_byte(pdev, 0x4C, setup);
264 }
265
266 /* Load the PIO mode bits */
267 pci_write_config_byte(pdev, 0x4F - ap->port_no,
268 ((FIT(t.act8b, 1, 16) - 1) << 4) | (FIT(t.rec8b, 1, 16) - 1));
269 pci_write_config_byte(pdev, 0x48 + offset,
270 ((FIT(t.active, 1, 16) - 1) << 4) | (FIT(t.recover, 1, 16) - 1));
271
272 /* Load the UDMA bits according to type */
273 switch(udma_type) {
274 default:
275 /* BUG() ? */
276 /* fall through */
277 case 33:
278 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 5) - 2)) : 0x03;
279 break;
280 case 66:
281 ut = t.udma ? (0xe8 | (FIT(t.udma, 2, 9) - 2)) : 0x0f;
282 break;
283 case 100:
284 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 9) - 2)) : 0x07;
285 break;
286 case 133:
287 ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 9) - 2)) : 0x07;
288 break;
289 }
Laurent Riffard08ebd432007-09-02 21:01:32 +0200290
Jeff Garzik669a5db2006-08-29 18:12:40 -0400291 /* Set UDMA unless device is not UDMA capable */
Bartlomiej Zolnierkiewicz943547a2007-12-02 03:47:01 +0100292 if (udma_type && t.udma) {
Laurent Riffard08ebd432007-09-02 21:01:32 +0200293 u8 cable80_status;
294
295 /* Get 80-wire cable detection bit */
296 pci_read_config_byte(pdev, 0x50 + offset, &cable80_status);
297 cable80_status &= 0x10;
298
299 pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status);
300 }
Jeff Garzik669a5db2006-08-29 18:12:40 -0400301}
302
303static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
304{
305 const struct via_isa_bridge *config = ap->host->private_data;
306 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
307 int mode = config->flags & VIA_UDMA;
308 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
309 static u8 udma[5] = { 0, 33, 66, 100, 133 };
310
311 via_do_set_mode(ap, adev, adev->pio_mode, tclock[mode], set_ast, udma[mode]);
312}
313
314static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
315{
316 const struct via_isa_bridge *config = ap->host->private_data;
317 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
318 int mode = config->flags & VIA_UDMA;
319 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
320 static u8 udma[5] = { 0, 33, 66, 100, 133 };
321
322 via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]);
323}
324
325static struct scsi_host_template via_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900326 ATA_BMDMA_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400327};
328
329static struct ata_port_operations via_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900330 .inherits = &ata_bmdma_port_ops,
331 .cable_detect = via_cable_detect,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400332 .set_piomode = via_set_piomode,
333 .set_dmamode = via_set_dmamode,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900334 .prereset = via_pre_reset,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400335};
336
337static struct ata_port_operations via_port_ops_noirq = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900338 .inherits = &via_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +0900339 .sff_data_xfer = ata_sff_data_xfer_noirq,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400340};
341
342/**
Alan627d2d32006-11-27 16:19:36 +0000343 * via_config_fifo - set up the FIFO
344 * @pdev: PCI device
345 * @flags: configuration flags
346 *
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200347 * Set the FIFO properties for this device if necessary. Used both on
Alan627d2d32006-11-27 16:19:36 +0000348 * set up and on and the resume path
349 */
350
351static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
352{
353 u8 enable;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500354
Alan627d2d32006-11-27 16:19:36 +0000355 /* 0x40 low bits indicate enabled channels */
356 pci_read_config_byte(pdev, 0x40 , &enable);
357 enable &= 3;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500358
Alan627d2d32006-11-27 16:19:36 +0000359 if (flags & VIA_SET_FIFO) {
Andrew Morton73720862006-12-20 13:09:10 -0500360 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
Alan627d2d32006-11-27 16:19:36 +0000361 u8 fifo;
362
363 pci_read_config_byte(pdev, 0x43, &fifo);
364
365 /* Clear PREQ# until DDACK# for errata */
366 if (flags & VIA_BAD_PREQ)
367 fifo &= 0x7F;
368 else
369 fifo &= 0x9f;
370 /* Turn on FIFO for enabled channels */
371 fifo |= fifo_setting[enable];
372 pci_write_config_byte(pdev, 0x43, fifo);
373 }
374}
375
376/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400377 * via_init_one - discovery callback
Alan627d2d32006-11-27 16:19:36 +0000378 * @pdev: PCI device
Jeff Garzik669a5db2006-08-29 18:12:40 -0400379 * @id: PCI table info
380 *
381 * A VIA IDE interface has been discovered. Figure out what revision
382 * and perform configuration work before handing it to the ATA layer
383 */
384
385static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
386{
387 /* Early VIA without UDMA support */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200388 static const struct ata_port_info via_mwdma_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200389 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400390 .pio_mask = 0x1f,
391 .mwdma_mask = 0x07,
392 .port_ops = &via_port_ops
393 };
394 /* Ditto with IRQ masking required */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200395 static const struct ata_port_info via_mwdma_info_borked = {
Tejun Heo464cf172007-05-27 15:10:40 +0200396 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400397 .pio_mask = 0x1f,
398 .mwdma_mask = 0x07,
399 .port_ops = &via_port_ops_noirq,
400 };
401 /* VIA UDMA 33 devices (and borked 66) */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200402 static const struct ata_port_info via_udma33_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200403 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400404 .pio_mask = 0x1f,
405 .mwdma_mask = 0x07,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400406 .udma_mask = ATA_UDMA2,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400407 .port_ops = &via_port_ops
408 };
409 /* VIA UDMA 66 devices */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200410 static const struct ata_port_info via_udma66_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200411 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400412 .pio_mask = 0x1f,
413 .mwdma_mask = 0x07,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400414 .udma_mask = ATA_UDMA4,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400415 .port_ops = &via_port_ops
416 };
417 /* VIA UDMA 100 devices */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200418 static const struct ata_port_info via_udma100_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200419 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400420 .pio_mask = 0x1f,
421 .mwdma_mask = 0x07,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400422 .udma_mask = ATA_UDMA5,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400423 .port_ops = &via_port_ops
424 };
425 /* UDMA133 with bad AST (All current 133) */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200426 static const struct ata_port_info via_udma133_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200427 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400428 .pio_mask = 0x1f,
429 .mwdma_mask = 0x07,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400430 .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400431 .port_ops = &via_port_ops
432 };
Tejun Heo887125e2008-03-25 12:22:49 +0900433 const struct ata_port_info *ppi[] = { NULL, NULL };
Jeff Garzik669a5db2006-08-29 18:12:40 -0400434 struct pci_dev *isa = NULL;
435 const struct via_isa_bridge *config;
436 static int printed_version;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400437 u8 enable;
438 u32 timing;
Tejun Heof08048e2008-03-25 12:22:47 +0900439 int rc;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400440
441 if (!printed_version++)
442 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
443
Tejun Heof08048e2008-03-25 12:22:47 +0900444 rc = pcim_enable_device(pdev);
445 if (rc)
446 return rc;
447
Jeff Garzik669a5db2006-08-29 18:12:40 -0400448 /* To find out how the IDE will behave and what features we
449 actually have to look at the bridge not the IDE controller */
450 for (config = via_isa_bridges; config->id; config++)
451 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
452 !!(config->flags & VIA_BAD_ID),
453 config->id, NULL))) {
454
Auke Kok44c10132007-06-08 15:46:36 -0700455 if (isa->revision >= config->rev_min &&
456 isa->revision <= config->rev_max)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400457 break;
458 pci_dev_put(isa);
459 }
460
461 if (!config->id) {
462 printk(KERN_WARNING "via: Unknown VIA SouthBridge, disabling.\n");
463 return -ENODEV;
464 }
465 pci_dev_put(isa);
466
467 /* 0x40 low bits indicate enabled channels */
468 pci_read_config_byte(pdev, 0x40 , &enable);
469 enable &= 3;
470 if (enable == 0) {
471 return -ENODEV;
472 }
473
474 /* Initialise the FIFO for the enabled channels. */
Alan627d2d32006-11-27 16:19:36 +0000475 via_config_fifo(pdev, config->flags);
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500476
Jeff Garzik669a5db2006-08-29 18:12:40 -0400477 /* Clock set up */
478 switch(config->flags & VIA_UDMA) {
479 case VIA_UDMA_NONE:
480 if (config->flags & VIA_NO_UNMASK)
Tejun Heo887125e2008-03-25 12:22:49 +0900481 ppi[0] = &via_mwdma_info_borked;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400482 else
Tejun Heo887125e2008-03-25 12:22:49 +0900483 ppi[0] = &via_mwdma_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400484 break;
485 case VIA_UDMA_33:
Tejun Heo887125e2008-03-25 12:22:49 +0900486 ppi[0] = &via_udma33_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400487 break;
488 case VIA_UDMA_66:
Tejun Heo887125e2008-03-25 12:22:49 +0900489 ppi[0] = &via_udma66_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400490 /* The 66 MHz devices require we enable the clock */
491 pci_read_config_dword(pdev, 0x50, &timing);
492 timing |= 0x80008;
493 pci_write_config_dword(pdev, 0x50, timing);
494 break;
495 case VIA_UDMA_100:
Tejun Heo887125e2008-03-25 12:22:49 +0900496 ppi[0] = &via_udma100_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400497 break;
498 case VIA_UDMA_133:
Tejun Heo887125e2008-03-25 12:22:49 +0900499 ppi[0] = &via_udma133_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400500 break;
501 default:
502 WARN_ON(1);
503 return -ENODEV;
504 }
505
506 if (config->flags & VIA_BAD_CLK66) {
507 /* Disable the 66MHz clock on problem devices */
508 pci_read_config_dword(pdev, 0x50, &timing);
509 timing &= ~0x80008;
510 pci_write_config_dword(pdev, 0x50, timing);
511 }
512
513 /* We have established the device type, now fire it up */
Tejun Heo9363c382008-04-07 22:47:16 +0900514 return ata_pci_sff_init_one(pdev, ppi, &via_sht, (void *)config);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400515}
516
Tejun Heo438ac6d2007-03-02 17:31:26 +0900517#ifdef CONFIG_PM
Alan627d2d32006-11-27 16:19:36 +0000518/**
519 * via_reinit_one - reinit after resume
520 * @pdev; PCI device
521 *
522 * Called when the VIA PATA device is resumed. We must then
523 * reconfigure the fifo and other setup we may have altered. In
524 * addition the kernel needs to have the resume methods on PCI
525 * quirk supported.
526 */
527
528static int via_reinit_one(struct pci_dev *pdev)
529{
530 u32 timing;
531 struct ata_host *host = dev_get_drvdata(&pdev->dev);
532 const struct via_isa_bridge *config = host->private_data;
Tejun Heof08048e2008-03-25 12:22:47 +0900533 int rc;
534
535 rc = ata_pci_device_do_resume(pdev);
536 if (rc)
537 return rc;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500538
Alan627d2d32006-11-27 16:19:36 +0000539 via_config_fifo(pdev, config->flags);
540
541 if ((config->flags & VIA_UDMA) == VIA_UDMA_66) {
542 /* The 66 MHz devices require we enable the clock */
543 pci_read_config_dword(pdev, 0x50, &timing);
544 timing |= 0x80008;
545 pci_write_config_dword(pdev, 0x50, timing);
546 }
547 if (config->flags & VIA_BAD_CLK66) {
548 /* Disable the 66MHz clock on problem devices */
549 pci_read_config_dword(pdev, 0x50, &timing);
550 timing &= ~0x80008;
551 pci_write_config_dword(pdev, 0x50, timing);
552 }
Tejun Heof08048e2008-03-25 12:22:47 +0900553
554 ata_host_resume(host);
555 return 0;
Alan627d2d32006-11-27 16:19:36 +0000556}
Tejun Heo438ac6d2007-03-02 17:31:26 +0900557#endif
Alan627d2d32006-11-27 16:19:36 +0000558
Jeff Garzik669a5db2006-08-29 18:12:40 -0400559static const struct pci_device_id via[] = {
Jeff Garzik52df0ee2007-05-25 05:02:06 -0400560 { PCI_VDEVICE(VIA, 0x0571), },
561 { PCI_VDEVICE(VIA, 0x0581), },
562 { PCI_VDEVICE(VIA, 0x1571), },
563 { PCI_VDEVICE(VIA, 0x3164), },
564 { PCI_VDEVICE(VIA, 0x5324), },
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400565
566 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400567};
568
569static struct pci_driver via_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400570 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400571 .id_table = via,
572 .probe = via_init_one,
Alan627d2d32006-11-27 16:19:36 +0000573 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900574#ifdef CONFIG_PM
Alan627d2d32006-11-27 16:19:36 +0000575 .suspend = ata_pci_device_suspend,
576 .resume = via_reinit_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900577#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400578};
579
580static int __init via_init(void)
581{
582 return pci_register_driver(&via_pci_driver);
583}
584
Jeff Garzik669a5db2006-08-29 18:12:40 -0400585static void __exit via_exit(void)
586{
587 pci_unregister_driver(&via_pci_driver);
588}
589
Jeff Garzik669a5db2006-08-29 18:12:40 -0400590MODULE_AUTHOR("Alan Cox");
591MODULE_DESCRIPTION("low-level driver for VIA PATA");
592MODULE_LICENSE("GPL");
593MODULE_DEVICE_TABLE(pci, via);
594MODULE_VERSION(DRV_VERSION);
595
596module_init(via_init);
597module_exit(via_exit);