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ALSA: hda - Add support for 92HD65 / 92HD66 family of codecs
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ata / ata_piix.c
blob6da6debee35bc2f2f00bddbf106d92cdd8763904
1 /*
2 * ata_piix.c - Intel PATA/SATA controllers
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 *
9 * Copyright 2003-2005 Red Hat Inc
10 * Copyright 2003-2005 Jeff Garzik
11 *
12 *
13 * Copyright header from piix.c:
14 *
15 * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
16 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
17 * Copyright (C) 2003 Red Hat Inc
18 *
19 *
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2, or (at your option)
23 * any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program; see the file COPYING. If not, write to
32 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
33 *
34 *
35 * libata documentation is available via 'make {ps|pdf}docs',
36 * as Documentation/DocBook/libata.*
37 *
38 * Hardware documentation available at http://developer.intel.com/
39 *
40 * Documentation
41 * Publicly available from Intel web site. Errata documentation
42 * is also publicly available. As an aide to anyone hacking on this
43 * driver the list of errata that are relevant is below, going back to
44 * PIIX4. Older device documentation is now a bit tricky to find.
45 *
46 * The chipsets all follow very much the same design. The original Triton
47 * series chipsets do _not_ support independent device timings, but this
48 * is fixed in Triton II. With the odd mobile exception the chips then
49 * change little except in gaining more modes until SATA arrives. This
50 * driver supports only the chips with independent timing (that is those
51 * with SITRE and the 0x44 timing register). See pata_oldpiix and pata_mpiix
52 * for the early chip drivers.
53 *
54 * Errata of note:
55 *
56 * Unfixable
57 * PIIX4 errata #9 - Only on ultra obscure hw
58 * ICH3 errata #13 - Not observed to affect real hw
59 * by Intel
60 *
61 * Things we must deal with
62 * PIIX4 errata #10 - BM IDE hang with non UDMA
63 * (must stop/start dma to recover)
64 * 440MX errata #15 - As PIIX4 errata #10
65 * PIIX4 errata #15 - Must not read control registers
66 * during a PIO transfer
67 * 440MX errata #13 - As PIIX4 errata #15
68 * ICH2 errata #21 - DMA mode 0 doesn't work right
69 * ICH0/1 errata #55 - As ICH2 errata #21
70 * ICH2 spec c #9 - Extra operations needed to handle
71 * drive hotswap [NOT YET SUPPORTED]
72 * ICH2 spec c #20 - IDE PRD must not cross a 64K boundary
73 * and must be dword aligned
74 * ICH2 spec c #24 - UDMA mode 4,5 t85/86 should be 6ns not 3.3
75 * ICH7 errata #16 - MWDMA1 timings are incorrect
76 *
77 * Should have been BIOS fixed:
78 * 450NX: errata #19 - DMA hangs on old 450NX
79 * 450NX: errata #20 - DMA hangs on old 450NX
80 * 450NX: errata #25 - Corruption with DMA on old 450NX
81 * ICH3 errata #15 - IDE deadlock under high load
82 * (BIOS must set dev 31 fn 0 bit 23)
83 * ICH3 errata #18 - Don't use native mode
84 */
85
86 #include <linux/kernel.h>
87 #include <linux/module.h>
88 #include <linux/pci.h>
89 #include <linux/init.h>
90 #include <linux/blkdev.h>
91 #include <linux/delay.h>
92 #include <linux/device.h>
93 #include <linux/gfp.h>
94 #include <scsi/scsi_host.h>
95 #include <linux/libata.h>
96 #include <linux/dmi.h>
97
98 #define DRV_NAME "ata_piix"
99 #define DRV_VERSION "2.13"
100
101 enum {
102 PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
103 ICH5_PMR = 0x90, /* port mapping register */
104 ICH5_PCS = 0x92, /* port control and status */
105 PIIX_SIDPR_BAR = 5,
106 PIIX_SIDPR_LEN = 16,
107 PIIX_SIDPR_IDX = 0,
108 PIIX_SIDPR_DATA = 4,
109
110 PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
111 PIIX_FLAG_SIDPR = (1 << 29), /* SATA idx/data pair regs */
112
113 PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
114 PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
115
116 PIIX_FLAG_PIO16 = (1 << 30), /*support 16bit PIO only*/
117
118 PIIX_80C_PRI = (1 << 5) | (1 << 4),
119 PIIX_80C_SEC = (1 << 7) | (1 << 6),
120
121 /* constants for mapping table */
122 P0 = 0, /* port 0 */
123 P1 = 1, /* port 1 */
124 P2 = 2, /* port 2 */
125 P3 = 3, /* port 3 */
126 IDE = -1, /* IDE */
127 NA = -2, /* not available */
128 RV = -3, /* reserved */
129
130 PIIX_AHCI_DEVICE = 6,
131
132 /* host->flags bits */
133 PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
134 };
135
136 enum piix_controller_ids {
137 /* controller IDs */
138 piix_pata_mwdma, /* PIIX3 MWDMA only */
139 piix_pata_33, /* PIIX4 at 33Mhz */
140 ich_pata_33, /* ICH up to UDMA 33 only */
141 ich_pata_66, /* ICH up to 66 Mhz */
142 ich_pata_100, /* ICH up to UDMA 100 */
143 ich_pata_100_nomwdma1, /* ICH up to UDMA 100 but with no MWDMA1*/
144 ich5_sata,
145 ich6_sata,
146 ich6m_sata,
147 ich8_sata,
148 ich8_2port_sata,
149 ich8m_apple_sata, /* locks up on second port enable */
150 tolapai_sata,
151 piix_pata_vmw, /* PIIX4 for VMware, spurious DMA_ERR */
152 ich8_sata_snb,
153 };
154
155 struct piix_map_db {
156 const u32 mask;
157 const u16 port_enable;
158 const int map[][4];
159 };
160
161 struct piix_host_priv {
162 const int *map;
163 u32 saved_iocfg;
164 void __iomem *sidpr;
165 };
166
167 static int piix_init_one(struct pci_dev *pdev,
168 const struct pci_device_id *ent);
169 static void piix_remove_one(struct pci_dev *pdev);
170 static int piix_pata_prereset(struct ata_link *link, unsigned long deadline);
171 static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev);
172 static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev);
173 static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev);
174 static int ich_pata_cable_detect(struct ata_port *ap);
175 static u8 piix_vmw_bmdma_status(struct ata_port *ap);
176 static int piix_sidpr_scr_read(struct ata_link *link,
177 unsigned int reg, u32 *val);
178 static int piix_sidpr_scr_write(struct ata_link *link,
179 unsigned int reg, u32 val);
180 static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
181 unsigned hints);
182 static bool piix_irq_check(struct ata_port *ap);
183 static int piix_port_start(struct ata_port *ap);
184 #ifdef CONFIG_PM
185 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
186 static int piix_pci_device_resume(struct pci_dev *pdev);
187 #endif
188
189 static unsigned int in_module_init = 1;
190
191 static const struct pci_device_id piix_pci_tbl[] = {
192 /* Intel PIIX3 for the 430HX etc */
193 { 0x8086, 0x7010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_mwdma },
194 /* VMware ICH4 */
195 { 0x8086, 0x7111, 0x15ad, 0x1976, 0, 0, piix_pata_vmw },
196 /* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
197 /* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
198 { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
199 /* Intel PIIX4 */
200 { 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
201 /* Intel PIIX4 */
202 { 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
203 /* Intel PIIX */
204 { 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
205 /* Intel ICH (i810, i815, i840) UDMA 66*/
206 { 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
207 /* Intel ICH0 : UDMA 33*/
208 { 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
209 /* Intel ICH2M */
210 { 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
211 /* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
212 { 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
213 /* Intel ICH3M */
214 { 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
215 /* Intel ICH3 (E7500/1) UDMA 100 */
216 { 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
217 /* Intel ICH4-L */
218 { 0x8086, 0x24C1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
219 /* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
220 { 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
221 { 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
222 /* Intel ICH5 */
223 { 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
224 /* C-ICH (i810E2) */
225 { 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
226 /* ESB (855GME/875P + 6300ESB) UDMA 100 */
227 { 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
228 /* ICH6 (and 6) (i915) UDMA 100 */
229 { 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
230 /* ICH7/7-R (i945, i975) UDMA 100*/
231 { 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
232 { 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
233 /* ICH8 Mobile PATA Controller */
234 { 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
235
236 /* SATA ports */
237
238 /* 82801EB (ICH5) */
239 { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
240 /* 82801EB (ICH5) */
241 { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
242 /* 6300ESB (ICH5 variant with broken PCS present bits) */
243 { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
244 /* 6300ESB pretending RAID */
245 { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
246 /* 82801FB/FW (ICH6/ICH6W) */
247 { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
248 /* 82801FR/FRW (ICH6R/ICH6RW) */
249 { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
250 /* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented).
251 * Attach iff the controller is in IDE mode. */
252 { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID,
253 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, ich6m_sata },
254 /* 82801GB/GR/GH (ICH7, identical to ICH6) */
255 { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
256 /* 2801GBM/GHM (ICH7M, identical to ICH6M) */
257 { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata },
258 /* Enterprise Southbridge 2 (631xESB/632xESB) */
259 { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
260 /* SATA Controller 1 IDE (ICH8) */
261 { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
262 /* SATA Controller 2 IDE (ICH8) */
263 { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
264 /* Mobile SATA Controller IDE (ICH8M), Apple */
265 { 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata },
266 { 0x8086, 0x2828, 0x106b, 0x00a1, 0, 0, ich8m_apple_sata },
267 { 0x8086, 0x2828, 0x106b, 0x00a3, 0, 0, ich8m_apple_sata },
268 /* Mobile SATA Controller IDE (ICH8M) */
269 { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
270 /* SATA Controller IDE (ICH9) */
271 { 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
272 /* SATA Controller IDE (ICH9) */
273 { 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
274 /* SATA Controller IDE (ICH9) */
275 { 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
276 /* SATA Controller IDE (ICH9M) */
277 { 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
278 /* SATA Controller IDE (ICH9M) */
279 { 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
280 /* SATA Controller IDE (ICH9M) */
281 { 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
282 /* SATA Controller IDE (Tolapai) */
283 { 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata },
284 /* SATA Controller IDE (ICH10) */
285 { 0x8086, 0x3a00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
286 /* SATA Controller IDE (ICH10) */
287 { 0x8086, 0x3a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
288 /* SATA Controller IDE (ICH10) */
289 { 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
290 /* SATA Controller IDE (ICH10) */
291 { 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
292 /* SATA Controller IDE (PCH) */
293 { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
294 /* SATA Controller IDE (PCH) */
295 { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
296 /* SATA Controller IDE (PCH) */
297 { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
298 /* SATA Controller IDE (PCH) */
299 { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
300 /* SATA Controller IDE (PCH) */
301 { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
302 /* SATA Controller IDE (PCH) */
303 { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
304 /* SATA Controller IDE (CPT) */
305 { 0x8086, 0x1c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
306 /* SATA Controller IDE (CPT) */
307 { 0x8086, 0x1c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
308 /* SATA Controller IDE (CPT) */
309 { 0x8086, 0x1c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
310 /* SATA Controller IDE (CPT) */
311 { 0x8086, 0x1c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
312 /* SATA Controller IDE (PBG) */
313 { 0x8086, 0x1d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
314 /* SATA Controller IDE (PBG) */
315 { 0x8086, 0x1d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
316 /* SATA Controller IDE (Panther Point) */
317 { 0x8086, 0x1e00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
318 /* SATA Controller IDE (Panther Point) */
319 { 0x8086, 0x1e01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
320 /* SATA Controller IDE (Panther Point) */
321 { 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
322 /* SATA Controller IDE (Panther Point) */
323 { 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
324 { } /* terminate list */
325 };
326
327 static struct pci_driver piix_pci_driver = {
328 .name = DRV_NAME,
329 .id_table = piix_pci_tbl,
330 .probe = piix_init_one,
331 .remove = piix_remove_one,
332 #ifdef CONFIG_PM
333 .suspend = piix_pci_device_suspend,
334 .resume = piix_pci_device_resume,
335 #endif
336 };
337
338 static struct scsi_host_template piix_sht = {
339 ATA_BMDMA_SHT(DRV_NAME),
340 };
341
342 static struct ata_port_operations piix_sata_ops = {
343 .inherits = &ata_bmdma32_port_ops,
344 .sff_irq_check = piix_irq_check,
345 .port_start = piix_port_start,
346 };
347
348 static struct ata_port_operations piix_pata_ops = {
349 .inherits = &piix_sata_ops,
350 .cable_detect = ata_cable_40wire,
351 .set_piomode = piix_set_piomode,
352 .set_dmamode = piix_set_dmamode,
353 .prereset = piix_pata_prereset,
354 };
355
356 static struct ata_port_operations piix_vmw_ops = {
357 .inherits = &piix_pata_ops,
358 .bmdma_status = piix_vmw_bmdma_status,
359 };
360
361 static struct ata_port_operations ich_pata_ops = {
362 .inherits = &piix_pata_ops,
363 .cable_detect = ich_pata_cable_detect,
364 .set_dmamode = ich_set_dmamode,
365 };
366
367 static struct device_attribute *piix_sidpr_shost_attrs[] = {
368 &dev_attr_link_power_management_policy,
369 NULL
370 };
371
372 static struct scsi_host_template piix_sidpr_sht = {
373 ATA_BMDMA_SHT(DRV_NAME),
374 .shost_attrs = piix_sidpr_shost_attrs,
375 };
376
377 static struct ata_port_operations piix_sidpr_sata_ops = {
378 .inherits = &piix_sata_ops,
379 .hardreset = sata_std_hardreset,
380 .scr_read = piix_sidpr_scr_read,
381 .scr_write = piix_sidpr_scr_write,
382 .set_lpm = piix_sidpr_set_lpm,
383 };
384
385 static const struct piix_map_db ich5_map_db = {
386 .mask = 0x7,
387 .port_enable = 0x3,
388 .map = {
389 /* PM PS SM SS MAP */
390 { P0, NA, P1, NA }, /* 000b */
391 { P1, NA, P0, NA }, /* 001b */
392 { RV, RV, RV, RV },
393 { RV, RV, RV, RV },
394 { P0, P1, IDE, IDE }, /* 100b */
395 { P1, P0, IDE, IDE }, /* 101b */
396 { IDE, IDE, P0, P1 }, /* 110b */
397 { IDE, IDE, P1, P0 }, /* 111b */
398 },
399 };
400
401 static const struct piix_map_db ich6_map_db = {
402 .mask = 0x3,
403 .port_enable = 0xf,
404 .map = {
405 /* PM PS SM SS MAP */
406 { P0, P2, P1, P3 }, /* 00b */
407 { IDE, IDE, P1, P3 }, /* 01b */
408 { P0, P2, IDE, IDE }, /* 10b */
409 { RV, RV, RV, RV },
410 },
411 };
412
413 static const struct piix_map_db ich6m_map_db = {
414 .mask = 0x3,
415 .port_enable = 0x5,
416
417 /* Map 01b isn't specified in the doc but some notebooks use
418 * it anyway. MAP 01b have been spotted on both ICH6M and
419 * ICH7M.
420 */
421 .map = {
422 /* PM PS SM SS MAP */
423 { P0, P2, NA, NA }, /* 00b */
424 { IDE, IDE, P1, P3 }, /* 01b */
425 { P0, P2, IDE, IDE }, /* 10b */
426 { RV, RV, RV, RV },
427 },
428 };
429
430 static const struct piix_map_db ich8_map_db = {
431 .mask = 0x3,
432 .port_enable = 0xf,
433 .map = {
434 /* PM PS SM SS MAP */
435 { P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
436 { RV, RV, RV, RV },
437 { P0, P2, IDE, IDE }, /* 10b (IDE mode) */
438 { RV, RV, RV, RV },
439 },
440 };
441
442 static const struct piix_map_db ich8_2port_map_db = {
443 .mask = 0x3,
444 .port_enable = 0x3,
445 .map = {
446 /* PM PS SM SS MAP */
447 { P0, NA, P1, NA }, /* 00b */
448 { RV, RV, RV, RV }, /* 01b */
449 { RV, RV, RV, RV }, /* 10b */
450 { RV, RV, RV, RV },
451 },
452 };
453
454 static const struct piix_map_db ich8m_apple_map_db = {
455 .mask = 0x3,
456 .port_enable = 0x1,
457 .map = {
458 /* PM PS SM SS MAP */
459 { P0, NA, NA, NA }, /* 00b */
460 { RV, RV, RV, RV },
461 { P0, P2, IDE, IDE }, /* 10b */
462 { RV, RV, RV, RV },
463 },
464 };
465
466 static const struct piix_map_db tolapai_map_db = {
467 .mask = 0x3,
468 .port_enable = 0x3,
469 .map = {
470 /* PM PS SM SS MAP */
471 { P0, NA, P1, NA }, /* 00b */
472 { RV, RV, RV, RV }, /* 01b */
473 { RV, RV, RV, RV }, /* 10b */
474 { RV, RV, RV, RV },
475 },
476 };
477
478 static const struct piix_map_db *piix_map_db_table[] = {
479 [ich5_sata] = &ich5_map_db,
480 [ich6_sata] = &ich6_map_db,
481 [ich6m_sata] = &ich6m_map_db,
482 [ich8_sata] = &ich8_map_db,
483 [ich8_2port_sata] = &ich8_2port_map_db,
484 [ich8m_apple_sata] = &ich8m_apple_map_db,
485 [tolapai_sata] = &tolapai_map_db,
486 [ich8_sata_snb] = &ich8_map_db,
487 };
488
489 static struct ata_port_info piix_port_info[] = {
490 [piix_pata_mwdma] = /* PIIX3 MWDMA only */
491 {
492 .flags = PIIX_PATA_FLAGS,
493 .pio_mask = ATA_PIO4,
494 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
495 .port_ops = &piix_pata_ops,
496 },
497
498 [piix_pata_33] = /* PIIX4 at 33MHz */
499 {
500 .flags = PIIX_PATA_FLAGS,
501 .pio_mask = ATA_PIO4,
502 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
503 .udma_mask = ATA_UDMA2,
504 .port_ops = &piix_pata_ops,
505 },
506
507 [ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
508 {
509 .flags = PIIX_PATA_FLAGS,
510 .pio_mask = ATA_PIO4,
511 .mwdma_mask = ATA_MWDMA12_ONLY, /* Check: maybe MWDMA0 is ok */
512 .udma_mask = ATA_UDMA2,
513 .port_ops = &ich_pata_ops,
514 },
515
516 [ich_pata_66] = /* ICH controllers up to 66MHz */
517 {
518 .flags = PIIX_PATA_FLAGS,
519 .pio_mask = ATA_PIO4,
520 .mwdma_mask = ATA_MWDMA12_ONLY, /* MWDMA0 is broken on chip */
521 .udma_mask = ATA_UDMA4,
522 .port_ops = &ich_pata_ops,
523 },
524
525 [ich_pata_100] =
526 {
527 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
528 .pio_mask = ATA_PIO4,
529 .mwdma_mask = ATA_MWDMA12_ONLY,
530 .udma_mask = ATA_UDMA5,
531 .port_ops = &ich_pata_ops,
532 },
533
534 [ich_pata_100_nomwdma1] =
535 {
536 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
537 .pio_mask = ATA_PIO4,
538 .mwdma_mask = ATA_MWDMA2_ONLY,
539 .udma_mask = ATA_UDMA5,
540 .port_ops = &ich_pata_ops,
541 },
542
543 [ich5_sata] =
544 {
545 .flags = PIIX_SATA_FLAGS,
546 .pio_mask = ATA_PIO4,
547 .mwdma_mask = ATA_MWDMA2,
548 .udma_mask = ATA_UDMA6,
549 .port_ops = &piix_sata_ops,
550 },
551
552 [ich6_sata] =
553 {
554 .flags = PIIX_SATA_FLAGS,
555 .pio_mask = ATA_PIO4,
556 .mwdma_mask = ATA_MWDMA2,
557 .udma_mask = ATA_UDMA6,
558 .port_ops = &piix_sata_ops,
559 },
560
561 [ich6m_sata] =
562 {
563 .flags = PIIX_SATA_FLAGS,
564 .pio_mask = ATA_PIO4,
565 .mwdma_mask = ATA_MWDMA2,
566 .udma_mask = ATA_UDMA6,
567 .port_ops = &piix_sata_ops,
568 },
569
570 [ich8_sata] =
571 {
572 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
573 .pio_mask = ATA_PIO4,
574 .mwdma_mask = ATA_MWDMA2,
575 .udma_mask = ATA_UDMA6,
576 .port_ops = &piix_sata_ops,
577 },
578
579 [ich8_2port_sata] =
580 {
581 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
582 .pio_mask = ATA_PIO4,
583 .mwdma_mask = ATA_MWDMA2,
584 .udma_mask = ATA_UDMA6,
585 .port_ops = &piix_sata_ops,
586 },
587
588 [tolapai_sata] =
589 {
590 .flags = PIIX_SATA_FLAGS,
591 .pio_mask = ATA_PIO4,
592 .mwdma_mask = ATA_MWDMA2,
593 .udma_mask = ATA_UDMA6,
594 .port_ops = &piix_sata_ops,
595 },
596
597 [ich8m_apple_sata] =
598 {
599 .flags = PIIX_SATA_FLAGS,
600 .pio_mask = ATA_PIO4,
601 .mwdma_mask = ATA_MWDMA2,
602 .udma_mask = ATA_UDMA6,
603 .port_ops = &piix_sata_ops,
604 },
605
606 [piix_pata_vmw] =
607 {
608 .flags = PIIX_PATA_FLAGS,
609 .pio_mask = ATA_PIO4,
610 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
611 .udma_mask = ATA_UDMA2,
612 .port_ops = &piix_vmw_ops,
613 },
614
615 /*
616 * some Sandybridge chipsets have broken 32 mode up to now,
617 * see https://bugzilla.kernel.org/show_bug.cgi?id=40592
618 */
619 [ich8_sata_snb] =
620 {
621 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
622 .pio_mask = ATA_PIO4,
623 .mwdma_mask = ATA_MWDMA2,
624 .udma_mask = ATA_UDMA6,
625 .port_ops = &piix_sata_ops,
626 },
627
628 };
629
630 static struct pci_bits piix_enable_bits[] = {
631 { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
632 { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
633 };
634
635 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
636 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
637 MODULE_LICENSE("GPL");
638 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
639 MODULE_VERSION(DRV_VERSION);
640
641 struct ich_laptop {
642 u16 device;
643 u16 subvendor;
644 u16 subdevice;
645 };
646
647 /*
648 * List of laptops that use short cables rather than 80 wire
649 */
650
651 static const struct ich_laptop ich_laptop[] = {
652 /* devid, subvendor, subdev */
653 { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
654 { 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
655 { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
656 { 0x27DF, 0x1028, 0x02b0 }, /* ICH7 on unknown Dell */
657 { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
658 { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
659 { 0x27DF, 0x103C, 0x361a }, /* ICH7 on unknown HP */
660 { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
661 { 0x27DF, 0x152D, 0x0778 }, /* ICH7 on unknown Intel */
662 { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
663 { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
664 { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
665 { 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
666 { 0x27df, 0x104d, 0x900e }, /* ICH7 on Sony TZ-90 */
667 /* end marker */
668 { 0, }
669 };
670
671 static int piix_port_start(struct ata_port *ap)
672 {
673 if (!(ap->flags & PIIX_FLAG_PIO16))
674 ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
675
676 return ata_bmdma_port_start(ap);
677 }
678
679 /**
680 * ich_pata_cable_detect - Probe host controller cable detect info
681 * @ap: Port for which cable detect info is desired
682 *
683 * Read 80c cable indicator from ATA PCI device's PCI config
684 * register. This register is normally set by firmware (BIOS).
685 *
686 * LOCKING:
687 * None (inherited from caller).
688 */
689
690 static int ich_pata_cable_detect(struct ata_port *ap)
691 {
692 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
693 struct piix_host_priv *hpriv = ap->host->private_data;
694 const struct ich_laptop *lap = &ich_laptop[0];
695 u8 mask;
696
697 /* Check for specials - Acer Aspire 5602WLMi */
698 while (lap->device) {
699 if (lap->device == pdev->device &&
700 lap->subvendor == pdev->subsystem_vendor &&
701 lap->subdevice == pdev->subsystem_device)
702 return ATA_CBL_PATA40_SHORT;
703
704 lap++;
705 }
706
707 /* check BIOS cable detect results */
708 mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
709 if ((hpriv->saved_iocfg & mask) == 0)
710 return ATA_CBL_PATA40;
711 return ATA_CBL_PATA80;
712 }
713
714 /**
715 * piix_pata_prereset - prereset for PATA host controller
716 * @link: Target link
717 * @deadline: deadline jiffies for the operation
718 *
719 * LOCKING:
720 * None (inherited from caller).
721 */
722 static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
723 {
724 struct ata_port *ap = link->ap;
725 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
726
727 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
728 return -ENOENT;
729 return ata_sff_prereset(link, deadline);
730 }
731
732 static DEFINE_SPINLOCK(piix_lock);
733
734 /**
735 * piix_set_piomode - Initialize host controller PATA PIO timings
736 * @ap: Port whose timings we are configuring
737 * @adev: um
738 *
739 * Set PIO mode for device, in host controller PCI config space.
740 *
741 * LOCKING:
742 * None (inherited from caller).
743 */
744
745 static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
746 {
747 struct pci_dev *dev = to_pci_dev(ap->host->dev);
748 unsigned long flags;
749 unsigned int pio = adev->pio_mode - XFER_PIO_0;
750 unsigned int is_slave = (adev->devno != 0);
751 unsigned int master_port= ap->port_no ? 0x42 : 0x40;
752 unsigned int slave_port = 0x44;
753 u16 master_data;
754 u8 slave_data;
755 u8 udma_enable;
756 int control = 0;
757
758 /*
759 * See Intel Document 298600-004 for the timing programing rules
760 * for ICH controllers.
761 */
762
763 static const /* ISP RTC */
764 u8 timings[][2] = { { 0, 0 },
765 { 0, 0 },
766 { 1, 0 },
767 { 2, 1 },
768 { 2, 3 }, };
769
770 if (pio >= 2)
771 control |= 1; /* TIME1 enable */
772 if (ata_pio_need_iordy(adev))
773 control |= 2; /* IE enable */
774
775 /* Intel specifies that the PPE functionality is for disk only */
776 if (adev->class == ATA_DEV_ATA)
777 control |= 4; /* PPE enable */
778
779 spin_lock_irqsave(&piix_lock, flags);
780
781 /* PIO configuration clears DTE unconditionally. It will be
782 * programmed in set_dmamode which is guaranteed to be called
783 * after set_piomode if any DMA mode is available.
784 */
785 pci_read_config_word(dev, master_port, &master_data);
786 if (is_slave) {
787 /* clear TIME1|IE1|PPE1|DTE1 */
788 master_data &= 0xff0f;
789 /* Enable SITRE (separate slave timing register) */
790 master_data |= 0x4000;
791 /* enable PPE1, IE1 and TIME1 as needed */
792 master_data |= (control << 4);
793 pci_read_config_byte(dev, slave_port, &slave_data);
794 slave_data &= (ap->port_no ? 0x0f : 0xf0);
795 /* Load the timing nibble for this slave */
796 slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
797 << (ap->port_no ? 4 : 0);
798 } else {
799 /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
800 master_data &= 0xccf0;
801 /* Enable PPE, IE and TIME as appropriate */
802 master_data |= control;
803 /* load ISP and RCT */
804 master_data |=
805 (timings[pio][0] << 12) |
806 (timings[pio][1] << 8);
807 }
808 pci_write_config_word(dev, master_port, master_data);
809 if (is_slave)
810 pci_write_config_byte(dev, slave_port, slave_data);
811
812 /* Ensure the UDMA bit is off - it will be turned back on if
813 UDMA is selected */
814
815 if (ap->udma_mask) {
816 pci_read_config_byte(dev, 0x48, &udma_enable);
817 udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
818 pci_write_config_byte(dev, 0x48, udma_enable);
819 }
820
821 spin_unlock_irqrestore(&piix_lock, flags);
822 }
823
824 /**
825 * do_pata_set_dmamode - Initialize host controller PATA PIO timings
826 * @ap: Port whose timings we are configuring
827 * @adev: Drive in question
828 * @isich: set if the chip is an ICH device
829 *
830 * Set UDMA mode for device, in host controller PCI config space.
831 *
832 * LOCKING:
833 * None (inherited from caller).
834 */
835
836 static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
837 {
838 struct pci_dev *dev = to_pci_dev(ap->host->dev);
839 unsigned long flags;
840 u8 master_port = ap->port_no ? 0x42 : 0x40;
841 u16 master_data;
842 u8 speed = adev->dma_mode;
843 int devid = adev->devno + 2 * ap->port_no;
844 u8 udma_enable = 0;
845
846 static const /* ISP RTC */
847 u8 timings[][2] = { { 0, 0 },
848 { 0, 0 },
849 { 1, 0 },
850 { 2, 1 },
851 { 2, 3 }, };
852
853 spin_lock_irqsave(&piix_lock, flags);
854
855 pci_read_config_word(dev, master_port, &master_data);
856 if (ap->udma_mask)
857 pci_read_config_byte(dev, 0x48, &udma_enable);
858
859 if (speed >= XFER_UDMA_0) {
860 unsigned int udma = adev->dma_mode - XFER_UDMA_0;
861 u16 udma_timing;
862 u16 ideconf;
863 int u_clock, u_speed;
864
865 /*
866 * UDMA is handled by a combination of clock switching and
867 * selection of dividers
868 *
869 * Handy rule: Odd modes are UDMATIMx 01, even are 02
870 * except UDMA0 which is 00
871 */
872 u_speed = min(2 - (udma & 1), udma);
873 if (udma == 5)
874 u_clock = 0x1000; /* 100Mhz */
875 else if (udma > 2)
876 u_clock = 1; /* 66Mhz */
877 else
878 u_clock = 0; /* 33Mhz */
879
880 udma_enable |= (1 << devid);
881
882 /* Load the CT/RP selection */
883 pci_read_config_word(dev, 0x4A, &udma_timing);
884 udma_timing &= ~(3 << (4 * devid));
885 udma_timing |= u_speed << (4 * devid);
886 pci_write_config_word(dev, 0x4A, udma_timing);
887
888 if (isich) {
889 /* Select a 33/66/100Mhz clock */
890 pci_read_config_word(dev, 0x54, &ideconf);
891 ideconf &= ~(0x1001 << devid);
892 ideconf |= u_clock << devid;
893 /* For ICH or later we should set bit 10 for better
894 performance (WR_PingPong_En) */
895 pci_write_config_word(dev, 0x54, ideconf);
896 }
897 } else {
898 /*
899 * MWDMA is driven by the PIO timings. We must also enable
900 * IORDY unconditionally along with TIME1. PPE has already
901 * been set when the PIO timing was set.
902 */
903 unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
904 unsigned int control;
905 u8 slave_data;
906 const unsigned int needed_pio[3] = {
907 XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
908 };
909 int pio = needed_pio[mwdma] - XFER_PIO_0;
910
911 control = 3; /* IORDY|TIME1 */
912
913 /* If the drive MWDMA is faster than it can do PIO then
914 we must force PIO into PIO0 */
915
916 if (adev->pio_mode < needed_pio[mwdma])
917 /* Enable DMA timing only */
918 control |= 8; /* PIO cycles in PIO0 */
919
920 if (adev->devno) { /* Slave */
921 master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
922 master_data |= control << 4;
923 pci_read_config_byte(dev, 0x44, &slave_data);
924 slave_data &= (ap->port_no ? 0x0f : 0xf0);
925 /* Load the matching timing */
926 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
927 pci_write_config_byte(dev, 0x44, slave_data);
928 } else { /* Master */
929 master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
930 and master timing bits */
931 master_data |= control;
932 master_data |=
933 (timings[pio][0] << 12) |
934 (timings[pio][1] << 8);
935 }
936
937 if (ap->udma_mask)
938 udma_enable &= ~(1 << devid);
939
940 pci_write_config_word(dev, master_port, master_data);
941 }
942 /* Don't scribble on 0x48 if the controller does not support UDMA */
943 if (ap->udma_mask)
944 pci_write_config_byte(dev, 0x48, udma_enable);
945
946 spin_unlock_irqrestore(&piix_lock, flags);
947 }
948
949 /**
950 * piix_set_dmamode - Initialize host controller PATA DMA timings
951 * @ap: Port whose timings we are configuring
952 * @adev: um
953 *
954 * Set MW/UDMA mode for device, in host controller PCI config space.
955 *
956 * LOCKING:
957 * None (inherited from caller).
958 */
959
960 static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev)
961 {
962 do_pata_set_dmamode(ap, adev, 0);
963 }
964
965 /**
966 * ich_set_dmamode - Initialize host controller PATA DMA timings
967 * @ap: Port whose timings we are configuring
968 * @adev: um
969 *
970 * Set MW/UDMA mode for device, in host controller PCI config space.
971 *
972 * LOCKING:
973 * None (inherited from caller).
974 */
975
976 static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
977 {
978 do_pata_set_dmamode(ap, adev, 1);
979 }
980
981 /*
982 * Serial ATA Index/Data Pair Superset Registers access
983 *
984 * Beginning from ICH8, there's a sane way to access SCRs using index
985 * and data register pair located at BAR5 which means that we have
986 * separate SCRs for master and slave. This is handled using libata
987 * slave_link facility.
988 */
989 static const int piix_sidx_map[] = {
990 [SCR_STATUS] = 0,
991 [SCR_ERROR] = 2,
992 [SCR_CONTROL] = 1,
993 };
994
995 static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
996 {
997 struct ata_port *ap = link->ap;
998 struct piix_host_priv *hpriv = ap->host->private_data;
999
1000 iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
1001 hpriv->sidpr + PIIX_SIDPR_IDX);
1002 }
1003
1004 static int piix_sidpr_scr_read(struct ata_link *link,
1005 unsigned int reg, u32 *val)
1006 {
1007 struct piix_host_priv *hpriv = link->ap->host->private_data;
1008
1009 if (reg >= ARRAY_SIZE(piix_sidx_map))
1010 return -EINVAL;
1011
1012 piix_sidpr_sel(link, reg);
1013 *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
1014 return 0;
1015 }
1016
1017 static int piix_sidpr_scr_write(struct ata_link *link,
1018 unsigned int reg, u32 val)
1019 {
1020 struct piix_host_priv *hpriv = link->ap->host->private_data;
1021
1022 if (reg >= ARRAY_SIZE(piix_sidx_map))
1023 return -EINVAL;
1024
1025 piix_sidpr_sel(link, reg);
1026 iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
1027 return 0;
1028 }
1029
1030 static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1031 unsigned hints)
1032 {
1033 return sata_link_scr_lpm(link, policy, false);
1034 }
1035
1036 static bool piix_irq_check(struct ata_port *ap)
1037 {
1038 if (unlikely(!ap->ioaddr.bmdma_addr))
1039 return false;
1040
1041 return ap->ops->bmdma_status(ap) & ATA_DMA_INTR;
1042 }
1043
1044 #ifdef CONFIG_PM
1045 static int piix_broken_suspend(void)
1046 {
1047 static const struct dmi_system_id sysids[] = {
1048 {
1049 .ident = "TECRA M3",
1050 .matches = {
1051 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1052 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
1053 },
1054 },
1055 {
1056 .ident = "TECRA M3",
1057 .matches = {
1058 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1059 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M3"),
1060 },
1061 },
1062 {
1063 .ident = "TECRA M4",
1064 .matches = {
1065 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1066 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M4"),
1067 },
1068 },
1069 {
1070 .ident = "TECRA M4",
1071 .matches = {
1072 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1073 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
1074 },
1075 },
1076 {
1077 .ident = "TECRA M5",
1078 .matches = {
1079 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1080 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
1081 },
1082 },
1083 {
1084 .ident = "TECRA M6",
1085 .matches = {
1086 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1087 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M6"),
1088 },
1089 },
1090 {
1091 .ident = "TECRA M7",
1092 .matches = {
1093 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1094 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
1095 },
1096 },
1097 {
1098 .ident = "TECRA A8",
1099 .matches = {
1100 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1101 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A8"),
1102 },
1103 },
1104 {
1105 .ident = "Satellite R20",
1106 .matches = {
1107 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1108 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R20"),
1109 },
1110 },
1111 {
1112 .ident = "Satellite R25",
1113 .matches = {
1114 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1115 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R25"),
1116 },
1117 },
1118 {
1119 .ident = "Satellite U200",
1120 .matches = {
1121 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1122 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
1123 },
1124 },
1125 {
1126 .ident = "Satellite U200",
1127 .matches = {
1128 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1129 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U200"),
1130 },
1131 },
1132 {
1133 .ident = "Satellite Pro U200",
1134 .matches = {
1135 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1136 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE PRO U200"),
1137 },
1138 },
1139 {
1140 .ident = "Satellite U205",
1141 .matches = {
1142 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1143 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
1144 },
1145 },
1146 {
1147 .ident = "SATELLITE U205",
1148 .matches = {
1149 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1150 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U205"),
1151 },
1152 },
1153 {
1154 .ident = "Portege M500",
1155 .matches = {
1156 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1157 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
1158 },
1159 },
1160 {
1161 .ident = "VGN-BX297XP",
1162 .matches = {
1163 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
1164 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-BX297XP"),
1165 },
1166 },
1167
1168 { } /* terminate list */
1169 };
1170 static const char *oemstrs[] = {
1171 "Tecra M3,",
1172 };
1173 int i;
1174
1175 if (dmi_check_system(sysids))
1176 return 1;
1177
1178 for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
1179 if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
1180 return 1;
1181
1182 /* TECRA M4 sometimes forgets its identify and reports bogus
1183 * DMI information. As the bogus information is a bit
1184 * generic, match as many entries as possible. This manual
1185 * matching is necessary because dmi_system_id.matches is
1186 * limited to four entries.
1187 */
1188 if (dmi_match(DMI_SYS_VENDOR, "TOSHIBA") &&
1189 dmi_match(DMI_PRODUCT_NAME, "000000") &&
1190 dmi_match(DMI_PRODUCT_VERSION, "000000") &&
1191 dmi_match(DMI_PRODUCT_SERIAL, "000000") &&
1192 dmi_match(DMI_BOARD_VENDOR, "TOSHIBA") &&
1193 dmi_match(DMI_BOARD_NAME, "Portable PC") &&
1194 dmi_match(DMI_BOARD_VERSION, "Version A0"))
1195 return 1;
1196
1197 return 0;
1198 }
1199
1200 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1201 {
1202 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1203 unsigned long flags;
1204 int rc = 0;
1205
1206 rc = ata_host_suspend(host, mesg);
1207 if (rc)
1208 return rc;
1209
1210 /* Some braindamaged ACPI suspend implementations expect the
1211 * controller to be awake on entry; otherwise, it burns cpu
1212 * cycles and power trying to do something to the sleeping
1213 * beauty.
1214 */
1215 if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) {
1216 pci_save_state(pdev);
1217
1218 /* mark its power state as "unknown", since we don't
1219 * know if e.g. the BIOS will change its device state
1220 * when we suspend.
1221 */
1222 if (pdev->current_state == PCI_D0)
1223 pdev->current_state = PCI_UNKNOWN;
1224
1225 /* tell resume that it's waking up from broken suspend */
1226 spin_lock_irqsave(&host->lock, flags);
1227 host->flags |= PIIX_HOST_BROKEN_SUSPEND;
1228 spin_unlock_irqrestore(&host->lock, flags);
1229 } else
1230 ata_pci_device_do_suspend(pdev, mesg);
1231
1232 return 0;
1233 }
1234
1235 static int piix_pci_device_resume(struct pci_dev *pdev)
1236 {
1237 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1238 unsigned long flags;
1239 int rc;
1240
1241 if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
1242 spin_lock_irqsave(&host->lock, flags);
1243 host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
1244 spin_unlock_irqrestore(&host->lock, flags);
1245
1246 pci_set_power_state(pdev, PCI_D0);
1247 pci_restore_state(pdev);
1248
1249 /* PCI device wasn't disabled during suspend. Use
1250 * pci_reenable_device() to avoid affecting the enable
1251 * count.
1252 */
1253 rc = pci_reenable_device(pdev);
1254 if (rc)
1255 dev_printk(KERN_ERR, &pdev->dev, "failed to enable "
1256 "device after resume (%d)\n", rc);
1257 } else
1258 rc = ata_pci_device_do_resume(pdev);
1259
1260 if (rc == 0)
1261 ata_host_resume(host);
1262
1263 return rc;
1264 }
1265 #endif
1266
1267 static u8 piix_vmw_bmdma_status(struct ata_port *ap)
1268 {
1269 return ata_bmdma_status(ap) & ~ATA_DMA_ERR;
1270 }
1271
1272 #define AHCI_PCI_BAR 5
1273 #define AHCI_GLOBAL_CTL 0x04
1274 #define AHCI_ENABLE (1 << 31)
1275 static int piix_disable_ahci(struct pci_dev *pdev)
1276 {
1277 void __iomem *mmio;
1278 u32 tmp;
1279 int rc = 0;
1280
1281 /* BUG: pci_enable_device has not yet been called. This
1282 * works because this device is usually set up by BIOS.
1283 */
1284
1285 if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
1286 !pci_resource_len(pdev, AHCI_PCI_BAR))
1287 return 0;
1288
1289 mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
1290 if (!mmio)
1291 return -ENOMEM;
1292
1293 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1294 if (tmp & AHCI_ENABLE) {
1295 tmp &= ~AHCI_ENABLE;
1296 iowrite32(tmp, mmio + AHCI_GLOBAL_CTL);
1297
1298 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1299 if (tmp & AHCI_ENABLE)
1300 rc = -EIO;
1301 }
1302
1303 pci_iounmap(pdev, mmio);
1304 return rc;
1305 }
1306
1307 /**
1308 * piix_check_450nx_errata - Check for problem 450NX setup
1309 * @ata_dev: the PCI device to check
1310 *
1311 * Check for the present of 450NX errata #19 and errata #25. If
1312 * they are found return an error code so we can turn off DMA
1313 */
1314
1315 static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
1316 {
1317 struct pci_dev *pdev = NULL;
1318 u16 cfg;
1319 int no_piix_dma = 0;
1320
1321 while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
1322 /* Look for 450NX PXB. Check for problem configurations
1323 A PCI quirk checks bit 6 already */
1324 pci_read_config_word(pdev, 0x41, &cfg);
1325 /* Only on the original revision: IDE DMA can hang */
1326 if (pdev->revision == 0x00)
1327 no_piix_dma = 1;
1328 /* On all revisions below 5 PXB bus lock must be disabled for IDE */
1329 else if (cfg & (1<<14) && pdev->revision < 5)
1330 no_piix_dma = 2;
1331 }
1332 if (no_piix_dma)
1333 dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
1334 if (no_piix_dma == 2)
1335 dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
1336 return no_piix_dma;
1337 }
1338
1339 static void __devinit piix_init_pcs(struct ata_host *host,
1340 const struct piix_map_db *map_db)
1341 {
1342 struct pci_dev *pdev = to_pci_dev(host->dev);
1343 u16 pcs, new_pcs;
1344
1345 pci_read_config_word(pdev, ICH5_PCS, &pcs);
1346
1347 new_pcs = pcs | map_db->port_enable;
1348
1349 if (new_pcs != pcs) {
1350 DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
1351 pci_write_config_word(pdev, ICH5_PCS, new_pcs);
1352 msleep(150);
1353 }
1354 }
1355
1356 static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
1357 struct ata_port_info *pinfo,
1358 const struct piix_map_db *map_db)
1359 {
1360 const int *map;
1361 int i, invalid_map = 0;
1362 u8 map_value;
1363
1364 pci_read_config_byte(pdev, ICH5_PMR, &map_value);
1365
1366 map = map_db->map[map_value & map_db->mask];
1367
1368 dev_printk(KERN_INFO, &pdev->dev, "MAP [");
1369 for (i = 0; i < 4; i++) {
1370 switch (map[i]) {
1371 case RV:
1372 invalid_map = 1;
1373 printk(" XX");
1374 break;
1375
1376 case NA:
1377 printk(" --");
1378 break;
1379
1380 case IDE:
1381 WARN_ON((i & 1) || map[i + 1] != IDE);
1382 pinfo[i / 2] = piix_port_info[ich_pata_100];
1383 i++;
1384 printk(" IDE IDE");
1385 break;
1386
1387 default:
1388 printk(" P%d", map[i]);
1389 if (i & 1)
1390 pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
1391 break;
1392 }
1393 }
1394 printk(" ]\n");
1395
1396 if (invalid_map)
1397 dev_printk(KERN_ERR, &pdev->dev,
1398 "invalid MAP value %u\n", map_value);
1399
1400 return map;
1401 }
1402
1403 static bool piix_no_sidpr(struct ata_host *host)
1404 {
1405 struct pci_dev *pdev = to_pci_dev(host->dev);
1406
1407 /*
1408 * Samsung DB-P70 only has three ATA ports exposed and
1409 * curiously the unconnected first port reports link online
1410 * while not responding to SRST protocol causing excessive
1411 * detection delay.
1412 *
1413 * Unfortunately, the system doesn't carry enough DMI
1414 * information to identify the machine but does have subsystem
1415 * vendor and device set. As it's unclear whether the
1416 * subsystem vendor/device is used only for this specific
1417 * board, the port can't be disabled solely with the
1418 * information; however, turning off SIDPR access works around
1419 * the problem. Turn it off.
1420 *
1421 * This problem is reported in bnc#441240.
1422 *
1423 * https://bugzilla.novell.com/show_bug.cgi?id=441420
1424 */
1425 if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
1426 pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
1427 pdev->subsystem_device == 0xb049) {
1428 dev_printk(KERN_WARNING, host->dev,
1429 "Samsung DB-P70 detected, disabling SIDPR\n");
1430 return true;
1431 }
1432
1433 return false;
1434 }
1435
1436 static int __devinit piix_init_sidpr(struct ata_host *host)
1437 {
1438 struct pci_dev *pdev = to_pci_dev(host->dev);
1439 struct piix_host_priv *hpriv = host->private_data;
1440 struct ata_link *link0 = &host->ports[0]->link;
1441 u32 scontrol;
1442 int i, rc;
1443
1444 /* check for availability */
1445 for (i = 0; i < 4; i++)
1446 if (hpriv->map[i] == IDE)
1447 return 0;
1448
1449 /* is it blacklisted? */
1450 if (piix_no_sidpr(host))
1451 return 0;
1452
1453 if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
1454 return 0;
1455
1456 if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
1457 pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
1458 return 0;
1459
1460 if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
1461 return 0;
1462
1463 hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
1464
1465 /* SCR access via SIDPR doesn't work on some configurations.
1466 * Give it a test drive by inhibiting power save modes which
1467 * we'll do anyway.
1468 */
1469 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1470
1471 /* if IPM is already 3, SCR access is probably working. Don't
1472 * un-inhibit power save modes as BIOS might have inhibited
1473 * them for a reason.
1474 */
1475 if ((scontrol & 0xf00) != 0x300) {
1476 scontrol |= 0x300;
1477 piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
1478 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1479
1480 if ((scontrol & 0xf00) != 0x300) {
1481 dev_printk(KERN_INFO, host->dev, "SCR access via "
1482 "SIDPR is available but doesn't work\n");
1483 return 0;
1484 }
1485 }
1486
1487 /* okay, SCRs available, set ops and ask libata for slave_link */
1488 for (i = 0; i < 2; i++) {
1489 struct ata_port *ap = host->ports[i];
1490
1491 ap->ops = &piix_sidpr_sata_ops;
1492
1493 if (ap->flags & ATA_FLAG_SLAVE_POSS) {
1494 rc = ata_slave_link_init(ap);
1495 if (rc)
1496 return rc;
1497 }
1498 }
1499
1500 return 0;
1501 }
1502
1503 static void piix_iocfg_bit18_quirk(struct ata_host *host)
1504 {
1505 static const struct dmi_system_id sysids[] = {
1506 {
1507 /* Clevo M570U sets IOCFG bit 18 if the cdrom
1508 * isn't used to boot the system which
1509 * disables the channel.
1510 */
1511 .ident = "M570U",
1512 .matches = {
1513 DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
1514 DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
1515 },
1516 },
1517
1518 { } /* terminate list */
1519 };
1520 struct pci_dev *pdev = to_pci_dev(host->dev);
1521 struct piix_host_priv *hpriv = host->private_data;
1522
1523 if (!dmi_check_system(sysids))
1524 return;
1525
1526 /* The datasheet says that bit 18 is NOOP but certain systems
1527 * seem to use it to disable a channel. Clear the bit on the
1528 * affected systems.
1529 */
1530 if (hpriv->saved_iocfg & (1 << 18)) {
1531 dev_printk(KERN_INFO, &pdev->dev,
1532 "applying IOCFG bit18 quirk\n");
1533 pci_write_config_dword(pdev, PIIX_IOCFG,
1534 hpriv->saved_iocfg & ~(1 << 18));
1535 }
1536 }
1537
1538 static bool piix_broken_system_poweroff(struct pci_dev *pdev)
1539 {
1540 static const struct dmi_system_id broken_systems[] = {
1541 {
1542 .ident = "HP Compaq 2510p",
1543 .matches = {
1544 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1545 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
1546 },
1547 /* PCI slot number of the controller */
1548 .driver_data = (void *)0x1FUL,
1549 },
1550 {
1551 .ident = "HP Compaq nc6000",
1552 .matches = {
1553 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1554 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nc6000"),
1555 },
1556 /* PCI slot number of the controller */
1557 .driver_data = (void *)0x1FUL,
1558 },
1559
1560 { } /* terminate list */
1561 };
1562 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
1563
1564 if (dmi) {
1565 unsigned long slot = (unsigned long)dmi->driver_data;
1566 /* apply the quirk only to on-board controllers */
1567 return slot == PCI_SLOT(pdev->devfn);
1568 }
1569
1570 return false;
1571 }
1572
1573 /**
1574 * piix_init_one - Register PIIX ATA PCI device with kernel services
1575 * @pdev: PCI device to register
1576 * @ent: Entry in piix_pci_tbl matching with @pdev
1577 *
1578 * Called from kernel PCI layer. We probe for combined mode (sigh),
1579 * and then hand over control to libata, for it to do the rest.
1580 *
1581 * LOCKING:
1582 * Inherited from PCI layer (may sleep).
1583 *
1584 * RETURNS:
1585 * Zero on success, or -ERRNO value.
1586 */
1587
1588 static int __devinit piix_init_one(struct pci_dev *pdev,
1589 const struct pci_device_id *ent)
1590 {
1591 static int printed_version;
1592 struct device *dev = &pdev->dev;
1593 struct ata_port_info port_info[2];
1594 const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
1595 struct scsi_host_template *sht = &piix_sht;
1596 unsigned long port_flags;
1597 struct ata_host *host;
1598 struct piix_host_priv *hpriv;
1599 int rc;
1600
1601 if (!printed_version++)
1602 dev_printk(KERN_DEBUG, &pdev->dev,
1603 "version " DRV_VERSION "\n");
1604
1605 /* no hotplugging support for later devices (FIXME) */
1606 if (!in_module_init && ent->driver_data >= ich5_sata)
1607 return -ENODEV;
1608
1609 if (piix_broken_system_poweroff(pdev)) {
1610 piix_port_info[ent->driver_data].flags |=
1611 ATA_FLAG_NO_POWEROFF_SPINDOWN |
1612 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
1613 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
1614 "on poweroff and hibernation\n");
1615 }
1616
1617 port_info[0] = piix_port_info[ent->driver_data];
1618 port_info[1] = piix_port_info[ent->driver_data];
1619
1620 port_flags = port_info[0].flags;
1621
1622 /* enable device and prepare host */
1623 rc = pcim_enable_device(pdev);
1624 if (rc)
1625 return rc;
1626
1627 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1628 if (!hpriv)
1629 return -ENOMEM;
1630
1631 /* Save IOCFG, this will be used for cable detection, quirk
1632 * detection and restoration on detach. This is necessary
1633 * because some ACPI implementations mess up cable related
1634 * bits on _STM. Reported on kernel bz#11879.
1635 */
1636 pci_read_config_dword(pdev, PIIX_IOCFG, &hpriv->saved_iocfg);
1637
1638 /* ICH6R may be driven by either ata_piix or ahci driver
1639 * regardless of BIOS configuration. Make sure AHCI mode is
1640 * off.
1641 */
1642 if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
1643 rc = piix_disable_ahci(pdev);
1644 if (rc)
1645 return rc;
1646 }
1647
1648 /* SATA map init can change port_info, do it before prepping host */
1649 if (port_flags & ATA_FLAG_SATA)
1650 hpriv->map = piix_init_sata_map(pdev, port_info,
1651 piix_map_db_table[ent->driver_data]);
1652
1653 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
1654 if (rc)
1655 return rc;
1656 host->private_data = hpriv;
1657
1658 /* initialize controller */
1659 if (port_flags & ATA_FLAG_SATA) {
1660 piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
1661 rc = piix_init_sidpr(host);
1662 if (rc)
1663 return rc;
1664 if (host->ports[0]->ops == &piix_sidpr_sata_ops)
1665 sht = &piix_sidpr_sht;
1666 }
1667
1668 /* apply IOCFG bit18 quirk */
1669 piix_iocfg_bit18_quirk(host);
1670
1671 /* On ICH5, some BIOSen disable the interrupt using the
1672 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
1673 * On ICH6, this bit has the same effect, but only when
1674 * MSI is disabled (and it is disabled, as we don't use
1675 * message-signalled interrupts currently).
1676 */
1677 if (port_flags & PIIX_FLAG_CHECKINTR)
1678 pci_intx(pdev, 1);
1679
1680 if (piix_check_450nx_errata(pdev)) {
1681 /* This writes into the master table but it does not
1682 really matter for this errata as we will apply it to
1683 all the PIIX devices on the board */
1684 host->ports[0]->mwdma_mask = 0;
1685 host->ports[0]->udma_mask = 0;
1686 host->ports[1]->mwdma_mask = 0;
1687 host->ports[1]->udma_mask = 0;
1688 }
1689 host->flags |= ATA_HOST_PARALLEL_SCAN;
1690
1691 pci_set_master(pdev);
1692 return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
1693 }
1694
1695 static void piix_remove_one(struct pci_dev *pdev)
1696 {
1697 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1698 struct piix_host_priv *hpriv = host->private_data;
1699
1700 pci_write_config_dword(pdev, PIIX_IOCFG, hpriv->saved_iocfg);
1701
1702 ata_pci_remove_one(pdev);
1703 }
1704
1705 static int __init piix_init(void)
1706 {
1707 int rc;
1708
1709 DPRINTK("pci_register_driver\n");
1710 rc = pci_register_driver(&piix_pci_driver);
1711 if (rc)
1712 return rc;
1713
1714 in_module_init = 0;
1715
1716 DPRINTK("done\n");
1717 return 0;
1718 }
1719
1720 static void __exit piix_exit(void)
1721 {
1722 pci_unregister_driver(&piix_pci_driver);
1723 }
1724
1725 module_init(piix_init);
1726 module_exit(piix_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree