blob: 0d97890af6818ee116c81b2edb474a266ed2ab54 [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
Jeff Garzik669a5db2006-08-29 18:12:40 -04004 *
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
Alan05c39e52007-01-31 17:14:38 +000025 * VIA VT8237S - 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>
Alan Coxcf5792d2007-05-23 22:39:01 +010062#include <linux/dmi.h>
Jeff Garzik669a5db2006-08-29 18:12:40 -040063
64#define DRV_NAME "pata_via"
Alan Coxb4746ed2009-04-17 12:21:21 +010065#define DRV_VERSION "0.3.4"
Jeff Garzik669a5db2006-08-29 18:12:40 -040066
67/*
68 * The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx
69 * driver.
70 */
71
72enum {
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 */
Tejun Heo7585eb12008-02-07 10:18:53 +090086 VIA_SATA_PATA = 0x800, /* SATA/PATA combined configuration */
Jeff Garzik669a5db2006-08-29 18:12:40 -040087};
88
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +080089enum {
90 VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */
91};
92
Jeff Garzik669a5db2006-08-29 18:12:40 -040093/*
94 * VIA SouthBridge chips.
95 */
96
97static 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[] = {
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800104 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f,
105 VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700106 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 |
107 VIA_BAD_AST | VIA_SATA_PATA },
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800108 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f,
109 VIA_UDMA_133 | VIA_BAD_AST },
Josepch Chane0b874d2007-01-27 13:47:08 +0100110 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Alan75f609d2006-12-04 16:38:25 +0000111 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
Tejun Heo7585eb12008-02-07 10:18:53 +0900112 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA },
Zlatko Calusic5955c7a2009-02-18 01:33:34 +0100113 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES },
JosephChan@via.com.tw7d948b12009-10-16 15:45:23 +0800114 { "vt6415", PCI_DEVICE_ID_VIA_6415, 0x00, 0xff, VIA_UDMA_133 | VIA_BAD_AST | VIA_NO_ENABLES },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400115 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
116 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
117 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
118 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
119 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
120 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
121 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 },
122 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 },
123 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 },
124 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
125 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 },
126 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
127 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
128 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
129 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
130 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
131 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
132 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
133 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800134 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f,
135 VIA_UDMA_133 | VIA_BAD_AST },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400136 { NULL }
137};
138
Alan Coxb4746ed2009-04-17 12:21:21 +0100139struct via_port {
140 u8 cached_device;
141};
Alan Coxcf5792d2007-05-23 22:39:01 +0100142
143/*
144 * Cable special cases
145 */
146
Jeff Garzik18552562007-10-03 15:15:40 -0400147static const struct dmi_system_id cable_dmi_table[] = {
Alan Coxcf5792d2007-05-23 22:39:01 +0100148 {
149 .ident = "Acer Ferrari 3400",
150 .matches = {
151 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
152 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
153 },
154 },
155 { }
156};
157
158static int via_cable_override(struct pci_dev *pdev)
159{
160 /* Systems by DMI */
161 if (dmi_check_system(cable_dmi_table))
162 return 1;
Alan Cox9edbdbe2007-08-22 22:57:48 +0100163 /* Arima W730-K8/Targa Visionary 811/... */
164 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
165 return 1;
Alan Coxcf5792d2007-05-23 22:39:01 +0100166 return 0;
167}
168
169
Jeff Garzik669a5db2006-08-29 18:12:40 -0400170/**
171 * via_cable_detect - cable detection
172 * @ap: ATA port
173 *
174 * Perform cable detection. Actually for the VIA case the BIOS
175 * already did this for us. We read the values provided by the
176 * BIOS. If you are using an 8235 in a non-PC configuration you
177 * may need to update this code.
178 *
179 * Hotplug also impacts on this.
180 */
181
182static int via_cable_detect(struct ata_port *ap) {
Alan Cox97cb81c2007-03-07 16:56:54 +0000183 const struct via_isa_bridge *config = ap->host->private_data;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400184 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
185 u32 ata66;
186
Alan Coxcf5792d2007-05-23 22:39:01 +0100187 if (via_cable_override(pdev))
188 return ATA_CBL_PATA40_SHORT;
189
Tejun Heo7585eb12008-02-07 10:18:53 +0900190 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)
191 return ATA_CBL_SATA;
192
Alan Cox97cb81c2007-03-07 16:56:54 +0000193 /* Early chips are 40 wire */
194 if ((config->flags & VIA_UDMA) < VIA_UDMA_66)
195 return ATA_CBL_PATA40;
196 /* UDMA 66 chips have only drive side logic */
Jeff Garzikb4479162007-10-25 20:47:30 -0400197 else if ((config->flags & VIA_UDMA) < VIA_UDMA_100)
Alan Cox97cb81c2007-03-07 16:56:54 +0000198 return ATA_CBL_PATA_UNK;
199 /* UDMA 100 or later */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400200 pci_read_config_dword(pdev, 0x50, &ata66);
201 /* Check both the drive cable reporting bits, we might not have
202 two drives */
203 if (ata66 & (0x10100000 >> (16 * ap->port_no)))
204 return ATA_CBL_PATA80;
Alan Cox7d73a362007-07-26 18:38:06 +0100205 /* Check with ACPI so we can spot BIOS reported SATA bridges */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900206 if (ata_acpi_init_gtm(ap) &&
207 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap)))
Alan Cox7d73a362007-07-26 18:38:06 +0100208 return ATA_CBL_PATA80;
Alan Cox97cb81c2007-03-07 16:56:54 +0000209 return ATA_CBL_PATA40;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400210}
211
Tejun Heocc0680a2007-08-06 18:36:23 +0900212static int via_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400213{
Tejun Heocc0680a2007-08-06 18:36:23 +0900214 struct ata_port *ap = link->ap;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400215 const struct via_isa_bridge *config = ap->host->private_data;
216
217 if (!(config->flags & VIA_NO_ENABLES)) {
218 static const struct pci_bits via_enable_bits[] = {
219 { 0x40, 1, 0x02, 0x02 },
220 { 0x40, 1, 0x01, 0x01 }
221 };
Jeff Garzik669a5db2006-08-29 18:12:40 -0400222 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Alan Coxc9619222006-09-26 17:53:38 +0100223 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
224 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400225 }
Tejun Heod4b2bab2007-02-02 16:50:52 +0900226
Tejun Heo9363c382008-04-07 22:47:16 +0900227 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400228}
229
230
231/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400232 * via_do_set_mode - set initial PIO mode data
233 * @ap: ATA interface
234 * @adev: ATA device
235 * @mode: ATA mode being programmed
236 * @tdiv: Clocks per PCI clock
237 * @set_ast: Set to program address setup
238 * @udma_type: UDMA mode/format of registers
239 *
240 * Program the VIA registers for DMA and PIO modes. Uses the ata timing
241 * support in order to compute modes.
242 *
243 * FIXME: Hotplug will require we serialize multiple mode changes
244 * on the two channels.
245 */
246
247static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mode, int tdiv, int set_ast, int udma_type)
248{
249 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
250 struct ata_device *peer = ata_dev_pair(adev);
251 struct ata_timing t, p;
252 static int via_clock = 33333; /* Bus clock in kHZ - ought to be tunable one day */
253 unsigned long T = 1000000000 / via_clock;
254 unsigned long UT = T/tdiv;
255 int ut;
256 int offset = 3 - (2*ap->port_no) - adev->devno;
257
Jeff Garzik669a5db2006-08-29 18:12:40 -0400258 /* Calculate the timing values we require */
259 ata_timing_compute(adev, mode, &t, T, UT);
260
261 /* We share 8bit timing so we must merge the constraints */
262 if (peer) {
263 if (peer->pio_mode) {
264 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
265 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
266 }
267 }
268
269 /* Address setup is programmable but breaks on UDMA133 setups */
270 if (set_ast) {
271 u8 setup; /* 2 bits per drive */
272 int shift = 2 * offset;
273
274 pci_read_config_byte(pdev, 0x4C, &setup);
275 setup &= ~(3 << shift);
Harvey Harrison07633b52008-05-14 16:17:00 -0700276 setup |= clamp_val(t.setup, 1, 4) << shift; /* 1,4 or 1,4 - 1 FIXME */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400277 pci_write_config_byte(pdev, 0x4C, setup);
278 }
279
280 /* Load the PIO mode bits */
281 pci_write_config_byte(pdev, 0x4F - ap->port_no,
Harvey Harrison07633b52008-05-14 16:17:00 -0700282 ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1));
Jeff Garzik669a5db2006-08-29 18:12:40 -0400283 pci_write_config_byte(pdev, 0x48 + offset,
Harvey Harrison07633b52008-05-14 16:17:00 -0700284 ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1));
Jeff Garzik669a5db2006-08-29 18:12:40 -0400285
286 /* Load the UDMA bits according to type */
287 switch(udma_type) {
288 default:
289 /* BUG() ? */
290 /* fall through */
291 case 33:
Harvey Harrison07633b52008-05-14 16:17:00 -0700292 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400293 break;
294 case 66:
Harvey Harrison07633b52008-05-14 16:17:00 -0700295 ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400296 break;
297 case 100:
Harvey Harrison07633b52008-05-14 16:17:00 -0700298 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400299 break;
300 case 133:
Harvey Harrison07633b52008-05-14 16:17:00 -0700301 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400302 break;
303 }
Laurent Riffard08ebd432007-09-02 21:01:32 +0200304
Jeff Garzik669a5db2006-08-29 18:12:40 -0400305 /* Set UDMA unless device is not UDMA capable */
Bartlomiej Zolnierkiewiczc4d8a202009-12-03 20:32:13 +0100306 if (udma_type) {
307 u8 udma_etc;
Laurent Riffard08ebd432007-09-02 21:01:32 +0200308
Bartlomiej Zolnierkiewiczc4d8a202009-12-03 20:32:13 +0100309 pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);
Laurent Riffard08ebd432007-09-02 21:01:32 +0200310
Bartlomiej Zolnierkiewiczc4d8a202009-12-03 20:32:13 +0100311 /* clear transfer mode bit */
312 udma_etc &= ~0x20;
313
314 if (t.udma) {
315 /* preserve 80-wire cable detection bit */
316 udma_etc &= 0x10;
317 udma_etc |= ut;
318 }
319
320 pci_write_config_byte(pdev, 0x50 + offset, udma_etc);
Laurent Riffard08ebd432007-09-02 21:01:32 +0200321 }
Jeff Garzik669a5db2006-08-29 18:12:40 -0400322}
323
324static void via_set_piomode(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->pio_mode, tclock[mode], set_ast, udma[mode]);
333}
334
335static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
336{
337 const struct via_isa_bridge *config = ap->host->private_data;
338 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
339 int mode = config->flags & VIA_UDMA;
340 static u8 tclock[5] = { 1, 1, 2, 3, 4 };
341 static u8 udma[5] = { 0, 33, 66, 100, 133 };
342
343 via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]);
344}
345
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700346/**
Alan Cox10734fc2009-11-30 13:22:43 +0000347 * via_mode_filter - filter buggy device/mode pairs
348 * @dev: ATA device
349 * @mask: Mode bitmask
350 *
351 * We need to apply some minimal filtering for old controllers and at least
352 * one breed of Transcend SSD. Return the updated mask.
353 */
354
355static unsigned long via_mode_filter(struct ata_device *dev, unsigned long mask)
356{
357 struct ata_host *host = dev->link->ap->host;
358 const struct via_isa_bridge *config = host->private_data;
359 unsigned char model_num[ATA_ID_PROD_LEN + 1];
360
361 if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {
362 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
363 if (strcmp(model_num, "TS64GSSD25-M") == 0) {
364 ata_dev_printk(dev, KERN_WARNING,
365 "disabling UDMA mode due to reported lockups with this device.\n");
366 mask &= ~ ATA_MASK_UDMA;
367 }
368 }
369 return ata_bmdma_mode_filter(dev, mask);
370}
371
372/**
Tejun Heoff047152008-07-31 18:02:35 +0900373 * via_tf_load - send taskfile registers to host controller
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700374 * @ap: Port to which output is sent
375 * @tf: ATA taskfile register set
376 *
377 * Outputs ATA taskfile to standard ATA host controller.
378 *
379 * Note: This is to fix the internal bug of via chipsets, which
Tejun Heoff047152008-07-31 18:02:35 +0900380 * will reset the device register after changing the IEN bit on
381 * ctl register
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700382 */
Tejun Heoff047152008-07-31 18:02:35 +0900383static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700384{
Alan Coxb4746ed2009-04-17 12:21:21 +0100385 struct ata_ioports *ioaddr = &ap->ioaddr;
386 struct via_port *vp = ap->private_data;
387 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
388 int newctl = 0;
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700389
Alan Coxb4746ed2009-04-17 12:21:21 +0100390 if (tf->ctl != ap->last_ctl) {
391 iowrite8(tf->ctl, ioaddr->ctl_addr);
392 ap->last_ctl = tf->ctl;
393 ata_wait_idle(ap);
394 newctl = 1;
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700395 }
Alan Coxb4746ed2009-04-17 12:21:21 +0100396
397 if (tf->flags & ATA_TFLAG_DEVICE) {
398 iowrite8(tf->device, ioaddr->device_addr);
399 vp->cached_device = tf->device;
400 } else if (newctl)
401 iowrite8(vp->cached_device, ioaddr->device_addr);
402
403 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
404 WARN_ON_ONCE(!ioaddr->ctl_addr);
405 iowrite8(tf->hob_feature, ioaddr->feature_addr);
406 iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
407 iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
408 iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
409 iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
410 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
411 tf->hob_feature,
412 tf->hob_nsect,
413 tf->hob_lbal,
414 tf->hob_lbam,
415 tf->hob_lbah);
416 }
417
418 if (is_addr) {
419 iowrite8(tf->feature, ioaddr->feature_addr);
420 iowrite8(tf->nsect, ioaddr->nsect_addr);
421 iowrite8(tf->lbal, ioaddr->lbal_addr);
422 iowrite8(tf->lbam, ioaddr->lbam_addr);
423 iowrite8(tf->lbah, ioaddr->lbah_addr);
424 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
425 tf->feature,
426 tf->nsect,
427 tf->lbal,
428 tf->lbam,
429 tf->lbah);
430 }
431
432 ata_wait_idle(ap);
433}
434
435static int via_port_start(struct ata_port *ap)
436{
437 struct via_port *vp;
438 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
439
440 int ret = ata_sff_port_start(ap);
441 if (ret < 0)
442 return ret;
443
444 vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL);
445 if (vp == NULL)
446 return -ENOMEM;
447 ap->private_data = vp;
448 return 0;
JosephChan@via.com.twbfce5e02008-07-30 12:32:48 -0700449}
450
Jeff Garzik669a5db2006-08-29 18:12:40 -0400451static struct scsi_host_template via_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900452 ATA_BMDMA_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400453};
454
455static struct ata_port_operations via_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900456 .inherits = &ata_bmdma_port_ops,
457 .cable_detect = via_cable_detect,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400458 .set_piomode = via_set_piomode,
459 .set_dmamode = via_set_dmamode,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900460 .prereset = via_pre_reset,
Tejun Heoff047152008-07-31 18:02:35 +0900461 .sff_tf_load = via_tf_load,
Alan Coxb4746ed2009-04-17 12:21:21 +0100462 .port_start = via_port_start,
Alan Cox10734fc2009-11-30 13:22:43 +0000463 .mode_filter = via_mode_filter,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400464};
465
466static struct ata_port_operations via_port_ops_noirq = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900467 .inherits = &via_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +0900468 .sff_data_xfer = ata_sff_data_xfer_noirq,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400469};
470
471/**
Alan627d2d32006-11-27 16:19:36 +0000472 * via_config_fifo - set up the FIFO
473 * @pdev: PCI device
474 * @flags: configuration flags
475 *
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200476 * Set the FIFO properties for this device if necessary. Used both on
Alan627d2d32006-11-27 16:19:36 +0000477 * set up and on and the resume path
478 */
479
480static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
481{
482 u8 enable;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500483
Alan627d2d32006-11-27 16:19:36 +0000484 /* 0x40 low bits indicate enabled channels */
485 pci_read_config_byte(pdev, 0x40 , &enable);
486 enable &= 3;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500487
Alan627d2d32006-11-27 16:19:36 +0000488 if (flags & VIA_SET_FIFO) {
Andrew Morton73720862006-12-20 13:09:10 -0500489 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
Alan627d2d32006-11-27 16:19:36 +0000490 u8 fifo;
491
492 pci_read_config_byte(pdev, 0x43, &fifo);
493
494 /* Clear PREQ# until DDACK# for errata */
495 if (flags & VIA_BAD_PREQ)
496 fifo &= 0x7F;
497 else
498 fifo &= 0x9f;
499 /* Turn on FIFO for enabled channels */
500 fifo |= fifo_setting[enable];
501 pci_write_config_byte(pdev, 0x43, fifo);
502 }
503}
504
505/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400506 * via_init_one - discovery callback
Alan627d2d32006-11-27 16:19:36 +0000507 * @pdev: PCI device
Jeff Garzik669a5db2006-08-29 18:12:40 -0400508 * @id: PCI table info
509 *
510 * A VIA IDE interface has been discovered. Figure out what revision
511 * and perform configuration work before handing it to the ATA layer
512 */
513
514static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
515{
516 /* Early VIA without UDMA support */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200517 static const struct ata_port_info via_mwdma_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200518 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100519 .pio_mask = ATA_PIO4,
520 .mwdma_mask = ATA_MWDMA2,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400521 .port_ops = &via_port_ops
522 };
523 /* Ditto with IRQ masking required */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200524 static const struct ata_port_info via_mwdma_info_borked = {
Tejun Heo464cf172007-05-27 15:10:40 +0200525 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100526 .pio_mask = ATA_PIO4,
527 .mwdma_mask = ATA_MWDMA2,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400528 .port_ops = &via_port_ops_noirq,
529 };
530 /* VIA UDMA 33 devices (and borked 66) */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200531 static const struct ata_port_info via_udma33_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200532 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100533 .pio_mask = ATA_PIO4,
534 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400535 .udma_mask = ATA_UDMA2,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400536 .port_ops = &via_port_ops
537 };
538 /* VIA UDMA 66 devices */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200539 static const struct ata_port_info via_udma66_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200540 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100541 .pio_mask = ATA_PIO4,
542 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400543 .udma_mask = ATA_UDMA4,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400544 .port_ops = &via_port_ops
545 };
546 /* VIA UDMA 100 devices */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200547 static const struct ata_port_info via_udma100_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200548 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100549 .pio_mask = ATA_PIO4,
550 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400551 .udma_mask = ATA_UDMA5,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400552 .port_ops = &via_port_ops
553 };
554 /* UDMA133 with bad AST (All current 133) */
Tejun Heo1626aeb2007-05-04 12:43:58 +0200555 static const struct ata_port_info via_udma133_info = {
Tejun Heo464cf172007-05-27 15:10:40 +0200556 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100557 .pio_mask = ATA_PIO4,
558 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400559 .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400560 .port_ops = &via_port_ops
561 };
Tejun Heo887125e2008-03-25 12:22:49 +0900562 const struct ata_port_info *ppi[] = { NULL, NULL };
Jiri Slaby7095e3e2009-11-04 17:11:03 +0100563 struct pci_dev *isa;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400564 const struct via_isa_bridge *config;
565 static int printed_version;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400566 u8 enable;
567 u32 timing;
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800568 unsigned long flags = id->driver_data;
Tejun Heof08048e2008-03-25 12:22:47 +0900569 int rc;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400570
571 if (!printed_version++)
572 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
573
Tejun Heof08048e2008-03-25 12:22:47 +0900574 rc = pcim_enable_device(pdev);
575 if (rc)
576 return rc;
577
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800578 if (flags & VIA_IDFLAG_SINGLE)
579 ppi[1] = &ata_dummy_port_info;
580
Jeff Garzik669a5db2006-08-29 18:12:40 -0400581 /* To find out how the IDE will behave and what features we
582 actually have to look at the bridge not the IDE controller */
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800583 for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON;
584 config++)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400585 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
586 !!(config->flags & VIA_BAD_ID),
587 config->id, NULL))) {
Jiri Slaby7095e3e2009-11-04 17:11:03 +0100588 u8 rev = isa->revision;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400589 pci_dev_put(isa);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400590
Jiri Slaby7095e3e2009-11-04 17:11:03 +0100591 if (rev >= config->rev_min && rev <= config->rev_max)
592 break;
593 }
Jeff Garzik669a5db2006-08-29 18:12:40 -0400594
Alan Cox11f64002008-04-29 14:10:57 +0100595 if (!(config->flags & VIA_NO_ENABLES)) {
596 /* 0x40 low bits indicate enabled channels */
597 pci_read_config_byte(pdev, 0x40 , &enable);
598 enable &= 3;
599 if (enable == 0)
600 return -ENODEV;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400601 }
602
603 /* Initialise the FIFO for the enabled channels. */
Alan627d2d32006-11-27 16:19:36 +0000604 via_config_fifo(pdev, config->flags);
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500605
Jeff Garzik669a5db2006-08-29 18:12:40 -0400606 /* Clock set up */
607 switch(config->flags & VIA_UDMA) {
608 case VIA_UDMA_NONE:
609 if (config->flags & VIA_NO_UNMASK)
Tejun Heo887125e2008-03-25 12:22:49 +0900610 ppi[0] = &via_mwdma_info_borked;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400611 else
Tejun Heo887125e2008-03-25 12:22:49 +0900612 ppi[0] = &via_mwdma_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400613 break;
614 case VIA_UDMA_33:
Tejun Heo887125e2008-03-25 12:22:49 +0900615 ppi[0] = &via_udma33_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400616 break;
617 case VIA_UDMA_66:
Tejun Heo887125e2008-03-25 12:22:49 +0900618 ppi[0] = &via_udma66_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400619 /* The 66 MHz devices require we enable the clock */
620 pci_read_config_dword(pdev, 0x50, &timing);
621 timing |= 0x80008;
622 pci_write_config_dword(pdev, 0x50, timing);
623 break;
624 case VIA_UDMA_100:
Tejun Heo887125e2008-03-25 12:22:49 +0900625 ppi[0] = &via_udma100_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400626 break;
627 case VIA_UDMA_133:
Tejun Heo887125e2008-03-25 12:22:49 +0900628 ppi[0] = &via_udma133_info;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400629 break;
630 default:
631 WARN_ON(1);
632 return -ENODEV;
633 }
634
635 if (config->flags & VIA_BAD_CLK66) {
636 /* Disable the 66MHz clock on problem devices */
637 pci_read_config_dword(pdev, 0x50, &timing);
638 timing &= ~0x80008;
639 pci_write_config_dword(pdev, 0x50, timing);
640 }
641
642 /* We have established the device type, now fire it up */
Tejun Heo9363c382008-04-07 22:47:16 +0900643 return ata_pci_sff_init_one(pdev, ppi, &via_sht, (void *)config);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400644}
645
Tejun Heo438ac6d2007-03-02 17:31:26 +0900646#ifdef CONFIG_PM
Alan627d2d32006-11-27 16:19:36 +0000647/**
648 * via_reinit_one - reinit after resume
649 * @pdev; PCI device
650 *
651 * Called when the VIA PATA device is resumed. We must then
652 * reconfigure the fifo and other setup we may have altered. In
653 * addition the kernel needs to have the resume methods on PCI
654 * quirk supported.
655 */
656
657static int via_reinit_one(struct pci_dev *pdev)
658{
659 u32 timing;
660 struct ata_host *host = dev_get_drvdata(&pdev->dev);
661 const struct via_isa_bridge *config = host->private_data;
Tejun Heof08048e2008-03-25 12:22:47 +0900662 int rc;
663
664 rc = ata_pci_device_do_resume(pdev);
665 if (rc)
666 return rc;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500667
Alan627d2d32006-11-27 16:19:36 +0000668 via_config_fifo(pdev, config->flags);
669
670 if ((config->flags & VIA_UDMA) == VIA_UDMA_66) {
671 /* The 66 MHz devices require we enable the clock */
672 pci_read_config_dword(pdev, 0x50, &timing);
673 timing |= 0x80008;
674 pci_write_config_dword(pdev, 0x50, timing);
675 }
676 if (config->flags & VIA_BAD_CLK66) {
677 /* Disable the 66MHz clock on problem devices */
678 pci_read_config_dword(pdev, 0x50, &timing);
679 timing &= ~0x80008;
680 pci_write_config_dword(pdev, 0x50, timing);
681 }
Tejun Heof08048e2008-03-25 12:22:47 +0900682
683 ata_host_resume(host);
684 return 0;
Alan627d2d32006-11-27 16:19:36 +0000685}
Tejun Heo438ac6d2007-03-02 17:31:26 +0900686#endif
Alan627d2d32006-11-27 16:19:36 +0000687
Jeff Garzik669a5db2006-08-29 18:12:40 -0400688static const struct pci_device_id via[] = {
Zlatko Calusic5955c7a2009-02-18 01:33:34 +0100689 { PCI_VDEVICE(VIA, 0x0415), },
Jeff Garzik52df0ee2007-05-25 05:02:06 -0400690 { PCI_VDEVICE(VIA, 0x0571), },
691 { PCI_VDEVICE(VIA, 0x0581), },
692 { PCI_VDEVICE(VIA, 0x1571), },
693 { PCI_VDEVICE(VIA, 0x3164), },
694 { PCI_VDEVICE(VIA, 0x5324), },
JosephChan@via.com.twe4d866c2009-01-23 15:37:39 +0800695 { PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE },
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400696
697 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400698};
699
700static struct pci_driver via_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400701 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400702 .id_table = via,
703 .probe = via_init_one,
Alan627d2d32006-11-27 16:19:36 +0000704 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900705#ifdef CONFIG_PM
Alan627d2d32006-11-27 16:19:36 +0000706 .suspend = ata_pci_device_suspend,
707 .resume = via_reinit_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900708#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400709};
710
711static int __init via_init(void)
712{
713 return pci_register_driver(&via_pci_driver);
714}
715
Jeff Garzik669a5db2006-08-29 18:12:40 -0400716static void __exit via_exit(void)
717{
718 pci_unregister_driver(&via_pci_driver);
719}
720
Jeff Garzik669a5db2006-08-29 18:12:40 -0400721MODULE_AUTHOR("Alan Cox");
722MODULE_DESCRIPTION("low-level driver for VIA PATA");
723MODULE_LICENSE("GPL");
724MODULE_DEVICE_TABLE(pci, via);
725MODULE_VERSION(DRV_VERSION);
726
727module_init(via_init);
728module_exit(via_exit);