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MERGE-master-patchset-edits
[linux-2.6/openmoko-kernel.git] / drivers / ata / ata_piix.c
blob54961c0b2c73a58e2dc64313ff95a858bbb262d2
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 * Publically available from Intel web site. Errata documentation
42 * is also publically 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 orginal Triton
47 * series chipsets do _not_ support independant 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 independant 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 *
76 * Should have been BIOS fixed:
77 * 450NX: errata #19 - DMA hangs on old 450NX
78 * 450NX: errata #20 - DMA hangs on old 450NX
79 * 450NX: errata #25 - Corruption with DMA on old 450NX
80 * ICH3 errata #15 - IDE deadlock under high load
81 * (BIOS must set dev 31 fn 0 bit 23)
82 * ICH3 errata #18 - Don't use native mode
83 */
84
85 #include <linux/kernel.h>
86 #include <linux/module.h>
87 #include <linux/pci.h>
88 #include <linux/init.h>
89 #include <linux/blkdev.h>
90 #include <linux/delay.h>
91 #include <linux/device.h>
92 #include <scsi/scsi_host.h>
93 #include <linux/libata.h>
94 #include <linux/dmi.h>
95
96 #define DRV_NAME "ata_piix"
97 #define DRV_VERSION "2.12"
98
99 enum {
100 PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
101 ICH5_PMR = 0x90, /* port mapping register */
102 ICH5_PCS = 0x92, /* port control and status */
103 PIIX_SIDPR_BAR = 5,
104 PIIX_SIDPR_LEN = 16,
105 PIIX_SIDPR_IDX = 0,
106 PIIX_SIDPR_DATA = 4,
107
108 PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
109 PIIX_FLAG_SIDPR = (1 << 29), /* SATA idx/data pair regs */
110
111 PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
112 PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
113
114 PIIX_80C_PRI = (1 << 5) | (1 << 4),
115 PIIX_80C_SEC = (1 << 7) | (1 << 6),
116
117 /* constants for mapping table */
118 P0 = 0, /* port 0 */
119 P1 = 1, /* port 1 */
120 P2 = 2, /* port 2 */
121 P3 = 3, /* port 3 */
122 IDE = -1, /* IDE */
123 NA = -2, /* not avaliable */
124 RV = -3, /* reserved */
125
126 PIIX_AHCI_DEVICE = 6,
127
128 /* host->flags bits */
129 PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
130 };
131
132 enum piix_controller_ids {
133 /* controller IDs */
134 piix_pata_mwdma, /* PIIX3 MWDMA only */
135 piix_pata_33, /* PIIX4 at 33Mhz */
136 ich_pata_33, /* ICH up to UDMA 33 only */
137 ich_pata_66, /* ICH up to 66 Mhz */
138 ich_pata_100, /* ICH up to UDMA 100 */
139 ich5_sata,
140 ich6_sata,
141 ich6m_sata,
142 ich8_sata,
143 ich8_2port_sata,
144 ich8m_apple_sata, /* locks up on second port enable */
145 tolapai_sata,
146 piix_pata_vmw, /* PIIX4 for VMware, spurious DMA_ERR */
147 };
148
149 struct piix_map_db {
150 const u32 mask;
151 const u16 port_enable;
152 const int map[][4];
153 };
154
155 struct piix_host_priv {
156 const int *map;
157 u32 saved_iocfg;
158 void __iomem *sidpr;
159 };
160
161 static int piix_init_one(struct pci_dev *pdev,
162 const struct pci_device_id *ent);
163 static void piix_remove_one(struct pci_dev *pdev);
164 static int piix_pata_prereset(struct ata_link *link, unsigned long deadline);
165 static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev);
166 static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev);
167 static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev);
168 static int ich_pata_cable_detect(struct ata_port *ap);
169 static u8 piix_vmw_bmdma_status(struct ata_port *ap);
170 static int piix_sidpr_scr_read(struct ata_link *link,
171 unsigned int reg, u32 *val);
172 static int piix_sidpr_scr_write(struct ata_link *link,
173 unsigned int reg, u32 val);
174 #ifdef CONFIG_PM
175 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
176 static int piix_pci_device_resume(struct pci_dev *pdev);
177 #endif
178
179 static unsigned int in_module_init = 1;
180
181 static const struct pci_device_id piix_pci_tbl[] = {
182 /* Intel PIIX3 for the 430HX etc */
183 { 0x8086, 0x7010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_mwdma },
184 /* VMware ICH4 */
185 { 0x8086, 0x7111, 0x15ad, 0x1976, 0, 0, piix_pata_vmw },
186 /* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
187 /* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
188 { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
189 /* Intel PIIX4 */
190 { 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
191 /* Intel PIIX4 */
192 { 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
193 /* Intel PIIX */
194 { 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
195 /* Intel ICH (i810, i815, i840) UDMA 66*/
196 { 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
197 /* Intel ICH0 : UDMA 33*/
198 { 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
199 /* Intel ICH2M */
200 { 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
201 /* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
202 { 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
203 /* Intel ICH3M */
204 { 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
205 /* Intel ICH3 (E7500/1) UDMA 100 */
206 { 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
207 /* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
208 { 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
209 { 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
210 /* Intel ICH5 */
211 { 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
212 /* C-ICH (i810E2) */
213 { 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
214 /* ESB (855GME/875P + 6300ESB) UDMA 100 */
215 { 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
216 /* ICH6 (and 6) (i915) UDMA 100 */
217 { 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
218 /* ICH7/7-R (i945, i975) UDMA 100*/
219 { 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
220 { 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
221 /* ICH8 Mobile PATA Controller */
222 { 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
223
224 /* NOTE: The following PCI ids must be kept in sync with the
225 * list in drivers/pci/quirks.c.
226 */
227
228 /* 82801EB (ICH5) */
229 { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
230 /* 82801EB (ICH5) */
231 { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
232 /* 6300ESB (ICH5 variant with broken PCS present bits) */
233 { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
234 /* 6300ESB pretending RAID */
235 { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
236 /* 82801FB/FW (ICH6/ICH6W) */
237 { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
238 /* 82801FR/FRW (ICH6R/ICH6RW) */
239 { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
240 /* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented).
241 * Attach iff the controller is in IDE mode. */
242 { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID,
243 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, ich6m_sata },
244 /* 82801GB/GR/GH (ICH7, identical to ICH6) */
245 { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
246 /* 2801GBM/GHM (ICH7M, identical to ICH6M) */
247 { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata },
248 /* Enterprise Southbridge 2 (631xESB/632xESB) */
249 { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
250 /* SATA Controller 1 IDE (ICH8) */
251 { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
252 /* SATA Controller 2 IDE (ICH8) */
253 { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
254 /* Mobile SATA Controller IDE (ICH8M), Apple */
255 { 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata },
256 { 0x8086, 0x2828, 0x106b, 0x00a1, 0, 0, ich8m_apple_sata },
257 { 0x8086, 0x2828, 0x106b, 0x00a3, 0, 0, ich8m_apple_sata },
258 /* Mobile SATA Controller IDE (ICH8M) */
259 { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
260 /* SATA Controller IDE (ICH9) */
261 { 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
262 /* SATA Controller IDE (ICH9) */
263 { 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
264 /* SATA Controller IDE (ICH9) */
265 { 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
266 /* SATA Controller IDE (ICH9M) */
267 { 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
268 /* SATA Controller IDE (ICH9M) */
269 { 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
270 /* SATA Controller IDE (ICH9M) */
271 { 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
272 /* SATA Controller IDE (Tolapai) */
273 { 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata },
274 /* SATA Controller IDE (ICH10) */
275 { 0x8086, 0x3a00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
276 /* SATA Controller IDE (ICH10) */
277 { 0x8086, 0x3a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
278 /* SATA Controller IDE (ICH10) */
279 { 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
280 /* SATA Controller IDE (ICH10) */
281 { 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
282 /* SATA Controller IDE (PCH) */
283 { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
284 /* SATA Controller IDE (PCH) */
285 { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
286 /* SATA Controller IDE (PCH) */
287 { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
288 /* SATA Controller IDE (PCH) */
289 { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
290 /* SATA Controller IDE (PCH) */
291 { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
292 /* SATA Controller IDE (PCH) */
293 { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
294 { } /* terminate list */
295 };
296
297 static struct pci_driver piix_pci_driver = {
298 .name = DRV_NAME,
299 .id_table = piix_pci_tbl,
300 .probe = piix_init_one,
301 .remove = piix_remove_one,
302 #ifdef CONFIG_PM
303 .suspend = piix_pci_device_suspend,
304 .resume = piix_pci_device_resume,
305 #endif
306 };
307
308 static struct scsi_host_template piix_sht = {
309 ATA_BMDMA_SHT(DRV_NAME),
310 };
311
312 static struct ata_port_operations piix_pata_ops = {
313 .inherits = &ata_bmdma32_port_ops,
314 .cable_detect = ata_cable_40wire,
315 .set_piomode = piix_set_piomode,
316 .set_dmamode = piix_set_dmamode,
317 .prereset = piix_pata_prereset,
318 };
319
320 static struct ata_port_operations piix_vmw_ops = {
321 .inherits = &piix_pata_ops,
322 .bmdma_status = piix_vmw_bmdma_status,
323 };
324
325 static struct ata_port_operations ich_pata_ops = {
326 .inherits = &piix_pata_ops,
327 .cable_detect = ich_pata_cable_detect,
328 .set_dmamode = ich_set_dmamode,
329 };
330
331 static struct ata_port_operations piix_sata_ops = {
332 .inherits = &ata_bmdma_port_ops,
333 };
334
335 static struct ata_port_operations piix_sidpr_sata_ops = {
336 .inherits = &piix_sata_ops,
337 .hardreset = sata_std_hardreset,
338 .scr_read = piix_sidpr_scr_read,
339 .scr_write = piix_sidpr_scr_write,
340 };
341
342 static const struct piix_map_db ich5_map_db = {
343 .mask = 0x7,
344 .port_enable = 0x3,
345 .map = {
346 /* PM PS SM SS MAP */
347 { P0, NA, P1, NA }, /* 000b */
348 { P1, NA, P0, NA }, /* 001b */
349 { RV, RV, RV, RV },
350 { RV, RV, RV, RV },
351 { P0, P1, IDE, IDE }, /* 100b */
352 { P1, P0, IDE, IDE }, /* 101b */
353 { IDE, IDE, P0, P1 }, /* 110b */
354 { IDE, IDE, P1, P0 }, /* 111b */
355 },
356 };
357
358 static const struct piix_map_db ich6_map_db = {
359 .mask = 0x3,
360 .port_enable = 0xf,
361 .map = {
362 /* PM PS SM SS MAP */
363 { P0, P2, P1, P3 }, /* 00b */
364 { IDE, IDE, P1, P3 }, /* 01b */
365 { P0, P2, IDE, IDE }, /* 10b */
366 { RV, RV, RV, RV },
367 },
368 };
369
370 static const struct piix_map_db ich6m_map_db = {
371 .mask = 0x3,
372 .port_enable = 0x5,
373
374 /* Map 01b isn't specified in the doc but some notebooks use
375 * it anyway. MAP 01b have been spotted on both ICH6M and
376 * ICH7M.
377 */
378 .map = {
379 /* PM PS SM SS MAP */
380 { P0, P2, NA, NA }, /* 00b */
381 { IDE, IDE, P1, P3 }, /* 01b */
382 { P0, P2, IDE, IDE }, /* 10b */
383 { RV, RV, RV, RV },
384 },
385 };
386
387 static const struct piix_map_db ich8_map_db = {
388 .mask = 0x3,
389 .port_enable = 0xf,
390 .map = {
391 /* PM PS SM SS MAP */
392 { P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
393 { RV, RV, RV, RV },
394 { P0, P2, IDE, IDE }, /* 10b (IDE mode) */
395 { RV, RV, RV, RV },
396 },
397 };
398
399 static const struct piix_map_db ich8_2port_map_db = {
400 .mask = 0x3,
401 .port_enable = 0x3,
402 .map = {
403 /* PM PS SM SS MAP */
404 { P0, NA, P1, NA }, /* 00b */
405 { RV, RV, RV, RV }, /* 01b */
406 { RV, RV, RV, RV }, /* 10b */
407 { RV, RV, RV, RV },
408 },
409 };
410
411 static const struct piix_map_db ich8m_apple_map_db = {
412 .mask = 0x3,
413 .port_enable = 0x1,
414 .map = {
415 /* PM PS SM SS MAP */
416 { P0, NA, NA, NA }, /* 00b */
417 { RV, RV, RV, RV },
418 { P0, P2, IDE, IDE }, /* 10b */
419 { RV, RV, RV, RV },
420 },
421 };
422
423 static const struct piix_map_db tolapai_map_db = {
424 .mask = 0x3,
425 .port_enable = 0x3,
426 .map = {
427 /* PM PS SM SS MAP */
428 { P0, NA, P1, NA }, /* 00b */
429 { RV, RV, RV, RV }, /* 01b */
430 { RV, RV, RV, RV }, /* 10b */
431 { RV, RV, RV, RV },
432 },
433 };
434
435 static const struct piix_map_db *piix_map_db_table[] = {
436 [ich5_sata] = &ich5_map_db,
437 [ich6_sata] = &ich6_map_db,
438 [ich6m_sata] = &ich6m_map_db,
439 [ich8_sata] = &ich8_map_db,
440 [ich8_2port_sata] = &ich8_2port_map_db,
441 [ich8m_apple_sata] = &ich8m_apple_map_db,
442 [tolapai_sata] = &tolapai_map_db,
443 };
444
445 static struct ata_port_info piix_port_info[] = {
446 [piix_pata_mwdma] = /* PIIX3 MWDMA only */
447 {
448 .flags = PIIX_PATA_FLAGS,
449 .pio_mask = 0x1f, /* pio0-4 */
450 .mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
451 .port_ops = &piix_pata_ops,
452 },
453
454 [piix_pata_33] = /* PIIX4 at 33MHz */
455 {
456 .flags = PIIX_PATA_FLAGS,
457 .pio_mask = 0x1f, /* pio0-4 */
458 .mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
459 .udma_mask = ATA_UDMA_MASK_40C,
460 .port_ops = &piix_pata_ops,
461 },
462
463 [ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
464 {
465 .flags = PIIX_PATA_FLAGS,
466 .pio_mask = 0x1f, /* pio 0-4 */
467 .mwdma_mask = 0x06, /* Check: maybe 0x07 */
468 .udma_mask = ATA_UDMA2, /* UDMA33 */
469 .port_ops = &ich_pata_ops,
470 },
471
472 [ich_pata_66] = /* ICH controllers up to 66MHz */
473 {
474 .flags = PIIX_PATA_FLAGS,
475 .pio_mask = 0x1f, /* pio 0-4 */
476 .mwdma_mask = 0x06, /* MWDMA0 is broken on chip */
477 .udma_mask = ATA_UDMA4,
478 .port_ops = &ich_pata_ops,
479 },
480
481 [ich_pata_100] =
482 {
483 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
484 .pio_mask = 0x1f, /* pio0-4 */
485 .mwdma_mask = 0x06, /* mwdma1-2 */
486 .udma_mask = ATA_UDMA5, /* udma0-5 */
487 .port_ops = &ich_pata_ops,
488 },
489
490 [ich5_sata] =
491 {
492 .flags = PIIX_SATA_FLAGS,
493 .pio_mask = 0x1f, /* pio0-4 */
494 .mwdma_mask = 0x07, /* mwdma0-2 */
495 .udma_mask = ATA_UDMA6,
496 .port_ops = &piix_sata_ops,
497 },
498
499 [ich6_sata] =
500 {
501 .flags = PIIX_SATA_FLAGS,
502 .pio_mask = 0x1f, /* pio0-4 */
503 .mwdma_mask = 0x07, /* mwdma0-2 */
504 .udma_mask = ATA_UDMA6,
505 .port_ops = &piix_sata_ops,
506 },
507
508 [ich6m_sata] =
509 {
510 .flags = PIIX_SATA_FLAGS,
511 .pio_mask = 0x1f, /* pio0-4 */
512 .mwdma_mask = 0x07, /* mwdma0-2 */
513 .udma_mask = ATA_UDMA6,
514 .port_ops = &piix_sata_ops,
515 },
516
517 [ich8_sata] =
518 {
519 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
520 .pio_mask = 0x1f, /* pio0-4 */
521 .mwdma_mask = 0x07, /* mwdma0-2 */
522 .udma_mask = ATA_UDMA6,
523 .port_ops = &piix_sata_ops,
524 },
525
526 [ich8_2port_sata] =
527 {
528 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
529 .pio_mask = 0x1f, /* pio0-4 */
530 .mwdma_mask = 0x07, /* mwdma0-2 */
531 .udma_mask = ATA_UDMA6,
532 .port_ops = &piix_sata_ops,
533 },
534
535 [tolapai_sata] =
536 {
537 .flags = PIIX_SATA_FLAGS,
538 .pio_mask = 0x1f, /* pio0-4 */
539 .mwdma_mask = 0x07, /* mwdma0-2 */
540 .udma_mask = ATA_UDMA6,
541 .port_ops = &piix_sata_ops,
542 },
543
544 [ich8m_apple_sata] =
545 {
546 .flags = PIIX_SATA_FLAGS,
547 .pio_mask = 0x1f, /* pio0-4 */
548 .mwdma_mask = 0x07, /* mwdma0-2 */
549 .udma_mask = ATA_UDMA6,
550 .port_ops = &piix_sata_ops,
551 },
552
553 [piix_pata_vmw] =
554 {
555 .flags = PIIX_PATA_FLAGS,
556 .pio_mask = 0x1f, /* pio0-4 */
557 .mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
558 .udma_mask = ATA_UDMA_MASK_40C,
559 .port_ops = &piix_vmw_ops,
560 },
561
562 };
563
564 static struct pci_bits piix_enable_bits[] = {
565 { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
566 { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
567 };
568
569 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
570 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
571 MODULE_LICENSE("GPL");
572 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
573 MODULE_VERSION(DRV_VERSION);
574
575 struct ich_laptop {
576 u16 device;
577 u16 subvendor;
578 u16 subdevice;
579 };
580
581 /*
582 * List of laptops that use short cables rather than 80 wire
583 */
584
585 static const struct ich_laptop ich_laptop[] = {
586 /* devid, subvendor, subdev */
587 { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
588 { 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
589 { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
590 { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
591 { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
592 { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
593 { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
594 { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
595 { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
596 { 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
597 /* end marker */
598 { 0, }
599 };
600
601 /**
602 * ich_pata_cable_detect - Probe host controller cable detect info
603 * @ap: Port for which cable detect info is desired
604 *
605 * Read 80c cable indicator from ATA PCI device's PCI config
606 * register. This register is normally set by firmware (BIOS).
607 *
608 * LOCKING:
609 * None (inherited from caller).
610 */
611
612 static int ich_pata_cable_detect(struct ata_port *ap)
613 {
614 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
615 struct piix_host_priv *hpriv = ap->host->private_data;
616 const struct ich_laptop *lap = &ich_laptop[0];
617 u8 mask;
618
619 /* Check for specials - Acer Aspire 5602WLMi */
620 while (lap->device) {
621 if (lap->device == pdev->device &&
622 lap->subvendor == pdev->subsystem_vendor &&
623 lap->subdevice == pdev->subsystem_device)
624 return ATA_CBL_PATA40_SHORT;
625
626 lap++;
627 }
628
629 /* check BIOS cable detect results */
630 mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
631 if ((hpriv->saved_iocfg & mask) == 0)
632 return ATA_CBL_PATA40;
633 return ATA_CBL_PATA80;
634 }
635
636 /**
637 * piix_pata_prereset - prereset for PATA host controller
638 * @link: Target link
639 * @deadline: deadline jiffies for the operation
640 *
641 * LOCKING:
642 * None (inherited from caller).
643 */
644 static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
645 {
646 struct ata_port *ap = link->ap;
647 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
648
649 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
650 return -ENOENT;
651 return ata_sff_prereset(link, deadline);
652 }
653
654 /**
655 * piix_set_piomode - Initialize host controller PATA PIO timings
656 * @ap: Port whose timings we are configuring
657 * @adev: um
658 *
659 * Set PIO mode for device, in host controller PCI config space.
660 *
661 * LOCKING:
662 * None (inherited from caller).
663 */
664
665 static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
666 {
667 unsigned int pio = adev->pio_mode - XFER_PIO_0;
668 struct pci_dev *dev = to_pci_dev(ap->host->dev);
669 unsigned int is_slave = (adev->devno != 0);
670 unsigned int master_port= ap->port_no ? 0x42 : 0x40;
671 unsigned int slave_port = 0x44;
672 u16 master_data;
673 u8 slave_data;
674 u8 udma_enable;
675 int control = 0;
676
677 /*
678 * See Intel Document 298600-004 for the timing programing rules
679 * for ICH controllers.
680 */
681
682 static const /* ISP RTC */
683 u8 timings[][2] = { { 0, 0 },
684 { 0, 0 },
685 { 1, 0 },
686 { 2, 1 },
687 { 2, 3 }, };
688
689 if (pio >= 2)
690 control |= 1; /* TIME1 enable */
691 if (ata_pio_need_iordy(adev))
692 control |= 2; /* IE enable */
693
694 /* Intel specifies that the PPE functionality is for disk only */
695 if (adev->class == ATA_DEV_ATA)
696 control |= 4; /* PPE enable */
697
698 /* PIO configuration clears DTE unconditionally. It will be
699 * programmed in set_dmamode which is guaranteed to be called
700 * after set_piomode if any DMA mode is available.
701 */
702 pci_read_config_word(dev, master_port, &master_data);
703 if (is_slave) {
704 /* clear TIME1|IE1|PPE1|DTE1 */
705 master_data &= 0xff0f;
706 /* Enable SITRE (separate slave timing register) */
707 master_data |= 0x4000;
708 /* enable PPE1, IE1 and TIME1 as needed */
709 master_data |= (control << 4);
710 pci_read_config_byte(dev, slave_port, &slave_data);
711 slave_data &= (ap->port_no ? 0x0f : 0xf0);
712 /* Load the timing nibble for this slave */
713 slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
714 << (ap->port_no ? 4 : 0);
715 } else {
716 /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
717 master_data &= 0xccf0;
718 /* Enable PPE, IE and TIME as appropriate */
719 master_data |= control;
720 /* load ISP and RCT */
721 master_data |=
722 (timings[pio][0] << 12) |
723 (timings[pio][1] << 8);
724 }
725 pci_write_config_word(dev, master_port, master_data);
726 if (is_slave)
727 pci_write_config_byte(dev, slave_port, slave_data);
728
729 /* Ensure the UDMA bit is off - it will be turned back on if
730 UDMA is selected */
731
732 if (ap->udma_mask) {
733 pci_read_config_byte(dev, 0x48, &udma_enable);
734 udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
735 pci_write_config_byte(dev, 0x48, udma_enable);
736 }
737 }
738
739 /**
740 * do_pata_set_dmamode - Initialize host controller PATA PIO timings
741 * @ap: Port whose timings we are configuring
742 * @adev: Drive in question
743 * @isich: set if the chip is an ICH device
744 *
745 * Set UDMA mode for device, in host controller PCI config space.
746 *
747 * LOCKING:
748 * None (inherited from caller).
749 */
750
751 static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
752 {
753 struct pci_dev *dev = to_pci_dev(ap->host->dev);
754 u8 master_port = ap->port_no ? 0x42 : 0x40;
755 u16 master_data;
756 u8 speed = adev->dma_mode;
757 int devid = adev->devno + 2 * ap->port_no;
758 u8 udma_enable = 0;
759
760 static const /* ISP RTC */
761 u8 timings[][2] = { { 0, 0 },
762 { 0, 0 },
763 { 1, 0 },
764 { 2, 1 },
765 { 2, 3 }, };
766
767 pci_read_config_word(dev, master_port, &master_data);
768 if (ap->udma_mask)
769 pci_read_config_byte(dev, 0x48, &udma_enable);
770
771 if (speed >= XFER_UDMA_0) {
772 unsigned int udma = adev->dma_mode - XFER_UDMA_0;
773 u16 udma_timing;
774 u16 ideconf;
775 int u_clock, u_speed;
776
777 /*
778 * UDMA is handled by a combination of clock switching and
779 * selection of dividers
780 *
781 * Handy rule: Odd modes are UDMATIMx 01, even are 02
782 * except UDMA0 which is 00
783 */
784 u_speed = min(2 - (udma & 1), udma);
785 if (udma == 5)
786 u_clock = 0x1000; /* 100Mhz */
787 else if (udma > 2)
788 u_clock = 1; /* 66Mhz */
789 else
790 u_clock = 0; /* 33Mhz */
791
792 udma_enable |= (1 << devid);
793
794 /* Load the CT/RP selection */
795 pci_read_config_word(dev, 0x4A, &udma_timing);
796 udma_timing &= ~(3 << (4 * devid));
797 udma_timing |= u_speed << (4 * devid);
798 pci_write_config_word(dev, 0x4A, udma_timing);
799
800 if (isich) {
801 /* Select a 33/66/100Mhz clock */
802 pci_read_config_word(dev, 0x54, &ideconf);
803 ideconf &= ~(0x1001 << devid);
804 ideconf |= u_clock << devid;
805 /* For ICH or later we should set bit 10 for better
806 performance (WR_PingPong_En) */
807 pci_write_config_word(dev, 0x54, ideconf);
808 }
809 } else {
810 /*
811 * MWDMA is driven by the PIO timings. We must also enable
812 * IORDY unconditionally along with TIME1. PPE has already
813 * been set when the PIO timing was set.
814 */
815 unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
816 unsigned int control;
817 u8 slave_data;
818 const unsigned int needed_pio[3] = {
819 XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
820 };
821 int pio = needed_pio[mwdma] - XFER_PIO_0;
822
823 control = 3; /* IORDY|TIME1 */
824
825 /* If the drive MWDMA is faster than it can do PIO then
826 we must force PIO into PIO0 */
827
828 if (adev->pio_mode < needed_pio[mwdma])
829 /* Enable DMA timing only */
830 control |= 8; /* PIO cycles in PIO0 */
831
832 if (adev->devno) { /* Slave */
833 master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
834 master_data |= control << 4;
835 pci_read_config_byte(dev, 0x44, &slave_data);
836 slave_data &= (ap->port_no ? 0x0f : 0xf0);
837 /* Load the matching timing */
838 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
839 pci_write_config_byte(dev, 0x44, slave_data);
840 } else { /* Master */
841 master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
842 and master timing bits */
843 master_data |= control;
844 master_data |=
845 (timings[pio][0] << 12) |
846 (timings[pio][1] << 8);
847 }
848
849 if (ap->udma_mask) {
850 udma_enable &= ~(1 << devid);
851 pci_write_config_word(dev, master_port, master_data);
852 }
853 }
854 /* Don't scribble on 0x48 if the controller does not support UDMA */
855 if (ap->udma_mask)
856 pci_write_config_byte(dev, 0x48, udma_enable);
857 }
858
859 /**
860 * piix_set_dmamode - Initialize host controller PATA DMA timings
861 * @ap: Port whose timings we are configuring
862 * @adev: um
863 *
864 * Set MW/UDMA mode for device, in host controller PCI config space.
865 *
866 * LOCKING:
867 * None (inherited from caller).
868 */
869
870 static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev)
871 {
872 do_pata_set_dmamode(ap, adev, 0);
873 }
874
875 /**
876 * ich_set_dmamode - Initialize host controller PATA DMA timings
877 * @ap: Port whose timings we are configuring
878 * @adev: um
879 *
880 * Set MW/UDMA mode for device, in host controller PCI config space.
881 *
882 * LOCKING:
883 * None (inherited from caller).
884 */
885
886 static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
887 {
888 do_pata_set_dmamode(ap, adev, 1);
889 }
890
891 /*
892 * Serial ATA Index/Data Pair Superset Registers access
893 *
894 * Beginning from ICH8, there's a sane way to access SCRs using index
895 * and data register pair located at BAR5 which means that we have
896 * separate SCRs for master and slave. This is handled using libata
897 * slave_link facility.
898 */
899 static const int piix_sidx_map[] = {
900 [SCR_STATUS] = 0,
901 [SCR_ERROR] = 2,
902 [SCR_CONTROL] = 1,
903 };
904
905 static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
906 {
907 struct ata_port *ap = link->ap;
908 struct piix_host_priv *hpriv = ap->host->private_data;
909
910 iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
911 hpriv->sidpr + PIIX_SIDPR_IDX);
912 }
913
914 static int piix_sidpr_scr_read(struct ata_link *link,
915 unsigned int reg, u32 *val)
916 {
917 struct piix_host_priv *hpriv = link->ap->host->private_data;
918
919 if (reg >= ARRAY_SIZE(piix_sidx_map))
920 return -EINVAL;
921
922 piix_sidpr_sel(link, reg);
923 *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
924 return 0;
925 }
926
927 static int piix_sidpr_scr_write(struct ata_link *link,
928 unsigned int reg, u32 val)
929 {
930 struct piix_host_priv *hpriv = link->ap->host->private_data;
931
932 if (reg >= ARRAY_SIZE(piix_sidx_map))
933 return -EINVAL;
934
935 piix_sidpr_sel(link, reg);
936 iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
937 return 0;
938 }
939
940 #ifdef CONFIG_PM
941 static int piix_broken_suspend(void)
942 {
943 static const struct dmi_system_id sysids[] = {
944 {
945 .ident = "TECRA M3",
946 .matches = {
947 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
948 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
949 },
950 },
951 {
952 .ident = "TECRA M3",
953 .matches = {
954 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
955 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M3"),
956 },
957 },
958 {
959 .ident = "TECRA M4",
960 .matches = {
961 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
962 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M4"),
963 },
964 },
965 {
966 .ident = "TECRA M4",
967 .matches = {
968 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
969 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
970 },
971 },
972 {
973 .ident = "TECRA M5",
974 .matches = {
975 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
976 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
977 },
978 },
979 {
980 .ident = "TECRA M6",
981 .matches = {
982 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
983 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M6"),
984 },
985 },
986 {
987 .ident = "TECRA M7",
988 .matches = {
989 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
990 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
991 },
992 },
993 {
994 .ident = "TECRA A8",
995 .matches = {
996 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
997 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A8"),
998 },
999 },
1000 {
1001 .ident = "Satellite R20",
1002 .matches = {
1003 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1004 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R20"),
1005 },
1006 },
1007 {
1008 .ident = "Satellite R25",
1009 .matches = {
1010 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1011 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R25"),
1012 },
1013 },
1014 {
1015 .ident = "Satellite U200",
1016 .matches = {
1017 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1018 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
1019 },
1020 },
1021 {
1022 .ident = "Satellite U200",
1023 .matches = {
1024 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1025 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U200"),
1026 },
1027 },
1028 {
1029 .ident = "Satellite Pro U200",
1030 .matches = {
1031 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1032 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE PRO U200"),
1033 },
1034 },
1035 {
1036 .ident = "Satellite U205",
1037 .matches = {
1038 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1039 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
1040 },
1041 },
1042 {
1043 .ident = "SATELLITE U205",
1044 .matches = {
1045 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1046 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U205"),
1047 },
1048 },
1049 {
1050 .ident = "Portege M500",
1051 .matches = {
1052 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1053 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
1054 },
1055 },
1056
1057 { } /* terminate list */
1058 };
1059 static const char *oemstrs[] = {
1060 "Tecra M3,",
1061 };
1062 int i;
1063
1064 if (dmi_check_system(sysids))
1065 return 1;
1066
1067 for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
1068 if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
1069 return 1;
1070
1071 /* TECRA M4 sometimes forgets its identify and reports bogus
1072 * DMI information. As the bogus information is a bit
1073 * generic, match as many entries as possible. This manual
1074 * matching is necessary because dmi_system_id.matches is
1075 * limited to four entries.
1076 */
1077 if (dmi_match(DMI_SYS_VENDOR, "TOSHIBA") &&
1078 dmi_match(DMI_PRODUCT_NAME, "000000") &&
1079 dmi_match(DMI_PRODUCT_VERSION, "000000") &&
1080 dmi_match(DMI_PRODUCT_SERIAL, "000000") &&
1081 dmi_match(DMI_BOARD_VENDOR, "TOSHIBA") &&
1082 dmi_match(DMI_BOARD_NAME, "Portable PC") &&
1083 dmi_match(DMI_BOARD_VERSION, "Version A0"))
1084 return 1;
1085
1086 return 0;
1087 }
1088
1089 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1090 {
1091 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1092 unsigned long flags;
1093 int rc = 0;
1094
1095 rc = ata_host_suspend(host, mesg);
1096 if (rc)
1097 return rc;
1098
1099 /* Some braindamaged ACPI suspend implementations expect the
1100 * controller to be awake on entry; otherwise, it burns cpu
1101 * cycles and power trying to do something to the sleeping
1102 * beauty.
1103 */
1104 if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) {
1105 pci_save_state(pdev);
1106
1107 /* mark its power state as "unknown", since we don't
1108 * know if e.g. the BIOS will change its device state
1109 * when we suspend.
1110 */
1111 if (pdev->current_state == PCI_D0)
1112 pdev->current_state = PCI_UNKNOWN;
1113
1114 /* tell resume that it's waking up from broken suspend */
1115 spin_lock_irqsave(&host->lock, flags);
1116 host->flags |= PIIX_HOST_BROKEN_SUSPEND;
1117 spin_unlock_irqrestore(&host->lock, flags);
1118 } else
1119 ata_pci_device_do_suspend(pdev, mesg);
1120
1121 return 0;
1122 }
1123
1124 static int piix_pci_device_resume(struct pci_dev *pdev)
1125 {
1126 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1127 unsigned long flags;
1128 int rc;
1129
1130 if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
1131 spin_lock_irqsave(&host->lock, flags);
1132 host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
1133 spin_unlock_irqrestore(&host->lock, flags);
1134
1135 pci_set_power_state(pdev, PCI_D0);
1136 pci_restore_state(pdev);
1137
1138 /* PCI device wasn't disabled during suspend. Use
1139 * pci_reenable_device() to avoid affecting the enable
1140 * count.
1141 */
1142 rc = pci_reenable_device(pdev);
1143 if (rc)
1144 dev_printk(KERN_ERR, &pdev->dev, "failed to enable "
1145 "device after resume (%d)\n", rc);
1146 } else
1147 rc = ata_pci_device_do_resume(pdev);
1148
1149 if (rc == 0)
1150 ata_host_resume(host);
1151
1152 return rc;
1153 }
1154 #endif
1155
1156 static u8 piix_vmw_bmdma_status(struct ata_port *ap)
1157 {
1158 return ata_bmdma_status(ap) & ~ATA_DMA_ERR;
1159 }
1160
1161 #define AHCI_PCI_BAR 5
1162 #define AHCI_GLOBAL_CTL 0x04
1163 #define AHCI_ENABLE (1 << 31)
1164 static int piix_disable_ahci(struct pci_dev *pdev)
1165 {
1166 void __iomem *mmio;
1167 u32 tmp;
1168 int rc = 0;
1169
1170 /* BUG: pci_enable_device has not yet been called. This
1171 * works because this device is usually set up by BIOS.
1172 */
1173
1174 if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
1175 !pci_resource_len(pdev, AHCI_PCI_BAR))
1176 return 0;
1177
1178 mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
1179 if (!mmio)
1180 return -ENOMEM;
1181
1182 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1183 if (tmp & AHCI_ENABLE) {
1184 tmp &= ~AHCI_ENABLE;
1185 iowrite32(tmp, mmio + AHCI_GLOBAL_CTL);
1186
1187 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1188 if (tmp & AHCI_ENABLE)
1189 rc = -EIO;
1190 }
1191
1192 pci_iounmap(pdev, mmio);
1193 return rc;
1194 }
1195
1196 /**
1197 * piix_check_450nx_errata - Check for problem 450NX setup
1198 * @ata_dev: the PCI device to check
1199 *
1200 * Check for the present of 450NX errata #19 and errata #25. If
1201 * they are found return an error code so we can turn off DMA
1202 */
1203
1204 static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
1205 {
1206 struct pci_dev *pdev = NULL;
1207 u16 cfg;
1208 int no_piix_dma = 0;
1209
1210 while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
1211 /* Look for 450NX PXB. Check for problem configurations
1212 A PCI quirk checks bit 6 already */
1213 pci_read_config_word(pdev, 0x41, &cfg);
1214 /* Only on the original revision: IDE DMA can hang */
1215 if (pdev->revision == 0x00)
1216 no_piix_dma = 1;
1217 /* On all revisions below 5 PXB bus lock must be disabled for IDE */
1218 else if (cfg & (1<<14) && pdev->revision < 5)
1219 no_piix_dma = 2;
1220 }
1221 if (no_piix_dma)
1222 dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
1223 if (no_piix_dma == 2)
1224 dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
1225 return no_piix_dma;
1226 }
1227
1228 static void __devinit piix_init_pcs(struct ata_host *host,
1229 const struct piix_map_db *map_db)
1230 {
1231 struct pci_dev *pdev = to_pci_dev(host->dev);
1232 u16 pcs, new_pcs;
1233
1234 pci_read_config_word(pdev, ICH5_PCS, &pcs);
1235
1236 new_pcs = pcs | map_db->port_enable;
1237
1238 if (new_pcs != pcs) {
1239 DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
1240 pci_write_config_word(pdev, ICH5_PCS, new_pcs);
1241 msleep(150);
1242 }
1243 }
1244
1245 static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
1246 struct ata_port_info *pinfo,
1247 const struct piix_map_db *map_db)
1248 {
1249 const int *map;
1250 int i, invalid_map = 0;
1251 u8 map_value;
1252
1253 pci_read_config_byte(pdev, ICH5_PMR, &map_value);
1254
1255 map = map_db->map[map_value & map_db->mask];
1256
1257 dev_printk(KERN_INFO, &pdev->dev, "MAP [");
1258 for (i = 0; i < 4; i++) {
1259 switch (map[i]) {
1260 case RV:
1261 invalid_map = 1;
1262 printk(" XX");
1263 break;
1264
1265 case NA:
1266 printk(" --");
1267 break;
1268
1269 case IDE:
1270 WARN_ON((i & 1) || map[i + 1] != IDE);
1271 pinfo[i / 2] = piix_port_info[ich_pata_100];
1272 i++;
1273 printk(" IDE IDE");
1274 break;
1275
1276 default:
1277 printk(" P%d", map[i]);
1278 if (i & 1)
1279 pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
1280 break;
1281 }
1282 }
1283 printk(" ]\n");
1284
1285 if (invalid_map)
1286 dev_printk(KERN_ERR, &pdev->dev,
1287 "invalid MAP value %u\n", map_value);
1288
1289 return map;
1290 }
1291
1292 static int __devinit piix_init_sidpr(struct ata_host *host)
1293 {
1294 struct pci_dev *pdev = to_pci_dev(host->dev);
1295 struct piix_host_priv *hpriv = host->private_data;
1296 struct ata_link *link0 = &host->ports[0]->link;
1297 u32 scontrol;
1298 int i, rc;
1299
1300 /* check for availability */
1301 for (i = 0; i < 4; i++)
1302 if (hpriv->map[i] == IDE)
1303 return 0;
1304
1305 if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
1306 return 0;
1307
1308 if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
1309 pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
1310 return 0;
1311
1312 if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
1313 return 0;
1314
1315 hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
1316
1317 /* SCR access via SIDPR doesn't work on some configurations.
1318 * Give it a test drive by inhibiting power save modes which
1319 * we'll do anyway.
1320 */
1321 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1322
1323 /* if IPM is already 3, SCR access is probably working. Don't
1324 * un-inhibit power save modes as BIOS might have inhibited
1325 * them for a reason.
1326 */
1327 if ((scontrol & 0xf00) != 0x300) {
1328 scontrol |= 0x300;
1329 piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
1330 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1331
1332 if ((scontrol & 0xf00) != 0x300) {
1333 dev_printk(KERN_INFO, host->dev, "SCR access via "
1334 "SIDPR is available but doesn't work\n");
1335 return 0;
1336 }
1337 }
1338
1339 /* okay, SCRs available, set ops and ask libata for slave_link */
1340 for (i = 0; i < 2; i++) {
1341 struct ata_port *ap = host->ports[i];
1342
1343 ap->ops = &piix_sidpr_sata_ops;
1344
1345 if (ap->flags & ATA_FLAG_SLAVE_POSS) {
1346 rc = ata_slave_link_init(ap);
1347 if (rc)
1348 return rc;
1349 }
1350 }
1351
1352 return 0;
1353 }
1354
1355 static void piix_iocfg_bit18_quirk(struct ata_host *host)
1356 {
1357 static const struct dmi_system_id sysids[] = {
1358 {
1359 /* Clevo M570U sets IOCFG bit 18 if the cdrom
1360 * isn't used to boot the system which
1361 * disables the channel.
1362 */
1363 .ident = "M570U",
1364 .matches = {
1365 DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
1366 DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
1367 },
1368 },
1369
1370 { } /* terminate list */
1371 };
1372 struct pci_dev *pdev = to_pci_dev(host->dev);
1373 struct piix_host_priv *hpriv = host->private_data;
1374
1375 if (!dmi_check_system(sysids))
1376 return;
1377
1378 /* The datasheet says that bit 18 is NOOP but certain systems
1379 * seem to use it to disable a channel. Clear the bit on the
1380 * affected systems.
1381 */
1382 if (hpriv->saved_iocfg & (1 << 18)) {
1383 dev_printk(KERN_INFO, &pdev->dev,
1384 "applying IOCFG bit18 quirk\n");
1385 pci_write_config_dword(pdev, PIIX_IOCFG,
1386 hpriv->saved_iocfg & ~(1 << 18));
1387 }
1388 }
1389
1390 static bool piix_broken_system_poweroff(struct pci_dev *pdev)
1391 {
1392 static const struct dmi_system_id broken_systems[] = {
1393 {
1394 .ident = "HP Compaq 2510p",
1395 .matches = {
1396 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1397 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
1398 },
1399 /* PCI slot number of the controller */
1400 .driver_data = (void *)0x1FUL,
1401 },
1402
1403 { } /* terminate list */
1404 };
1405 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
1406
1407 if (dmi) {
1408 unsigned long slot = (unsigned long)dmi->driver_data;
1409 /* apply the quirk only to on-board controllers */
1410 return slot == PCI_SLOT(pdev->devfn);
1411 }
1412
1413 return false;
1414 }
1415
1416 /**
1417 * piix_init_one - Register PIIX ATA PCI device with kernel services
1418 * @pdev: PCI device to register
1419 * @ent: Entry in piix_pci_tbl matching with @pdev
1420 *
1421 * Called from kernel PCI layer. We probe for combined mode (sigh),
1422 * and then hand over control to libata, for it to do the rest.
1423 *
1424 * LOCKING:
1425 * Inherited from PCI layer (may sleep).
1426 *
1427 * RETURNS:
1428 * Zero on success, or -ERRNO value.
1429 */
1430
1431 static int __devinit piix_init_one(struct pci_dev *pdev,
1432 const struct pci_device_id *ent)
1433 {
1434 static int printed_version;
1435 struct device *dev = &pdev->dev;
1436 struct ata_port_info port_info[2];
1437 const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
1438 unsigned long port_flags;
1439 struct ata_host *host;
1440 struct piix_host_priv *hpriv;
1441 int rc;
1442
1443 if (!printed_version++)
1444 dev_printk(KERN_DEBUG, &pdev->dev,
1445 "version " DRV_VERSION "\n");
1446
1447 /* no hotplugging support (FIXME) */
1448 if (!in_module_init)
1449 return -ENODEV;
1450
1451 if (piix_broken_system_poweroff(pdev)) {
1452 piix_port_info[ent->driver_data].flags |=
1453 ATA_FLAG_NO_POWEROFF_SPINDOWN |
1454 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
1455 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
1456 "on poweroff and hibernation\n");
1457 }
1458
1459 port_info[0] = piix_port_info[ent->driver_data];
1460 port_info[1] = piix_port_info[ent->driver_data];
1461
1462 port_flags = port_info[0].flags;
1463
1464 /* enable device and prepare host */
1465 rc = pcim_enable_device(pdev);
1466 if (rc)
1467 return rc;
1468
1469 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1470 if (!hpriv)
1471 return -ENOMEM;
1472
1473 /* Save IOCFG, this will be used for cable detection, quirk
1474 * detection and restoration on detach. This is necessary
1475 * because some ACPI implementations mess up cable related
1476 * bits on _STM. Reported on kernel bz#11879.
1477 */
1478 pci_read_config_dword(pdev, PIIX_IOCFG, &hpriv->saved_iocfg);
1479
1480 /* ICH6R may be driven by either ata_piix or ahci driver
1481 * regardless of BIOS configuration. Make sure AHCI mode is
1482 * off.
1483 */
1484 if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
1485 rc = piix_disable_ahci(pdev);
1486 if (rc)
1487 return rc;
1488 }
1489
1490 /* SATA map init can change port_info, do it before prepping host */
1491 if (port_flags & ATA_FLAG_SATA)
1492 hpriv->map = piix_init_sata_map(pdev, port_info,
1493 piix_map_db_table[ent->driver_data]);
1494
1495 rc = ata_pci_sff_prepare_host(pdev, ppi, &host);
1496 if (rc)
1497 return rc;
1498 host->private_data = hpriv;
1499
1500 /* initialize controller */
1501 if (port_flags & ATA_FLAG_SATA) {
1502 piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
1503 rc = piix_init_sidpr(host);
1504 if (rc)
1505 return rc;
1506 }
1507
1508 /* apply IOCFG bit18 quirk */
1509 piix_iocfg_bit18_quirk(host);
1510
1511 /* On ICH5, some BIOSen disable the interrupt using the
1512 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
1513 * On ICH6, this bit has the same effect, but only when
1514 * MSI is disabled (and it is disabled, as we don't use
1515 * message-signalled interrupts currently).
1516 */
1517 if (port_flags & PIIX_FLAG_CHECKINTR)
1518 pci_intx(pdev, 1);
1519
1520 if (piix_check_450nx_errata(pdev)) {
1521 /* This writes into the master table but it does not
1522 really matter for this errata as we will apply it to
1523 all the PIIX devices on the board */
1524 host->ports[0]->mwdma_mask = 0;
1525 host->ports[0]->udma_mask = 0;
1526 host->ports[1]->mwdma_mask = 0;
1527 host->ports[1]->udma_mask = 0;
1528 }
1529
1530 pci_set_master(pdev);
1531 return ata_pci_sff_activate_host(host, ata_sff_interrupt, &piix_sht);
1532 }
1533
1534 static void piix_remove_one(struct pci_dev *pdev)
1535 {
1536 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1537 struct piix_host_priv *hpriv = host->private_data;
1538
1539 pci_write_config_dword(pdev, PIIX_IOCFG, hpriv->saved_iocfg);
1540
1541 ata_pci_remove_one(pdev);
1542 }
1543
1544 static int __init piix_init(void)
1545 {
1546 int rc;
1547
1548 DPRINTK("pci_register_driver\n");
1549 rc = pci_register_driver(&piix_pci_driver);
1550 if (rc)
1551 return rc;
1552
1553 in_module_init = 0;
1554
1555 DPRINTK("done\n");
1556 return 0;
1557 }
1558
1559 static void __exit piix_exit(void)
1560 {
1561 pci_unregister_driver(&piix_pci_driver);
1562 }
1563
1564 module_init(piix_init);
1565 module_exit(piix_exit);
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