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tcp: gso: fix truesize tracking
[linux-2.6.git] / drivers / ata / ata_piix.c
blob513ad7ed0c997e19c3b3c4190b09221199c3d16c
1 /*
2 * ata_piix.c - Intel PATA/SATA controllers
3 *
4 * Maintained by: Tejun Heo <tj@kernel.org>
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 ich8_2port_sata_snb,
154 ich8_2port_sata_byt,
155 };
156
157 struct piix_map_db {
158 const u32 mask;
159 const u16 port_enable;
160 const int map[][4];
161 };
162
163 struct piix_host_priv {
164 const int *map;
165 u32 saved_iocfg;
166 void __iomem *sidpr;
167 };
168
169 static unsigned int in_module_init = 1;
170
171 static const struct pci_device_id piix_pci_tbl[] = {
172 /* Intel PIIX3 for the 430HX etc */
173 { 0x8086, 0x7010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_mwdma },
174 /* VMware ICH4 */
175 { 0x8086, 0x7111, 0x15ad, 0x1976, 0, 0, piix_pata_vmw },
176 /* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
177 /* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
178 { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
179 /* Intel PIIX4 */
180 { 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
181 /* Intel PIIX4 */
182 { 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
183 /* Intel PIIX */
184 { 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
185 /* Intel ICH (i810, i815, i840) UDMA 66*/
186 { 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
187 /* Intel ICH0 : UDMA 33*/
188 { 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
189 /* Intel ICH2M */
190 { 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
191 /* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
192 { 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
193 /* Intel ICH3M */
194 { 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
195 /* Intel ICH3 (E7500/1) UDMA 100 */
196 { 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
197 /* Intel ICH4-L */
198 { 0x8086, 0x24C1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
199 /* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
200 { 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
201 { 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
202 /* Intel ICH5 */
203 { 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
204 /* C-ICH (i810E2) */
205 { 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
206 /* ESB (855GME/875P + 6300ESB) UDMA 100 */
207 { 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
208 /* ICH6 (and 6) (i915) UDMA 100 */
209 { 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
210 /* ICH7/7-R (i945, i975) UDMA 100*/
211 { 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
212 { 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
213 /* ICH8 Mobile PATA Controller */
214 { 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
215
216 /* SATA ports */
217
218 /* 82801EB (ICH5) */
219 { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
220 /* 82801EB (ICH5) */
221 { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
222 /* 6300ESB (ICH5 variant with broken PCS present bits) */
223 { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
224 /* 6300ESB pretending RAID */
225 { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
226 /* 82801FB/FW (ICH6/ICH6W) */
227 { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
228 /* 82801FR/FRW (ICH6R/ICH6RW) */
229 { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
230 /* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented).
231 * Attach iff the controller is in IDE mode. */
232 { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID,
233 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, ich6m_sata },
234 /* 82801GB/GR/GH (ICH7, identical to ICH6) */
235 { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
236 /* 2801GBM/GHM (ICH7M, identical to ICH6M) */
237 { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata },
238 /* Enterprise Southbridge 2 (631xESB/632xESB) */
239 { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
240 /* SATA Controller 1 IDE (ICH8) */
241 { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
242 /* SATA Controller 2 IDE (ICH8) */
243 { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
244 /* Mobile SATA Controller IDE (ICH8M), Apple */
245 { 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata },
246 { 0x8086, 0x2828, 0x106b, 0x00a1, 0, 0, ich8m_apple_sata },
247 { 0x8086, 0x2828, 0x106b, 0x00a3, 0, 0, ich8m_apple_sata },
248 /* Mobile SATA Controller IDE (ICH8M) */
249 { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
250 /* SATA Controller IDE (ICH9) */
251 { 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
252 /* SATA Controller IDE (ICH9) */
253 { 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
254 /* SATA Controller IDE (ICH9) */
255 { 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
256 /* SATA Controller IDE (ICH9M) */
257 { 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
258 /* SATA Controller IDE (ICH9M) */
259 { 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
260 /* SATA Controller IDE (ICH9M) */
261 { 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
262 /* SATA Controller IDE (Tolapai) */
263 { 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata },
264 /* SATA Controller IDE (ICH10) */
265 { 0x8086, 0x3a00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
266 /* SATA Controller IDE (ICH10) */
267 { 0x8086, 0x3a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
268 /* SATA Controller IDE (ICH10) */
269 { 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
270 /* SATA Controller IDE (ICH10) */
271 { 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
272 /* SATA Controller IDE (PCH) */
273 { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
274 /* SATA Controller IDE (PCH) */
275 { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
276 /* SATA Controller IDE (PCH) */
277 { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
278 /* SATA Controller IDE (PCH) */
279 { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
280 /* SATA Controller IDE (PCH) */
281 { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
282 /* SATA Controller IDE (PCH) */
283 { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
284 /* SATA Controller IDE (CPT) */
285 { 0x8086, 0x1c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
286 /* SATA Controller IDE (CPT) */
287 { 0x8086, 0x1c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
288 /* SATA Controller IDE (CPT) */
289 { 0x8086, 0x1c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
290 /* SATA Controller IDE (CPT) */
291 { 0x8086, 0x1c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
292 /* SATA Controller IDE (PBG) */
293 { 0x8086, 0x1d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
294 /* SATA Controller IDE (PBG) */
295 { 0x8086, 0x1d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
296 /* SATA Controller IDE (Panther Point) */
297 { 0x8086, 0x1e00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
298 /* SATA Controller IDE (Panther Point) */
299 { 0x8086, 0x1e01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
300 /* SATA Controller IDE (Panther Point) */
301 { 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
302 /* SATA Controller IDE (Panther Point) */
303 { 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
304 /* SATA Controller IDE (Lynx Point) */
305 { 0x8086, 0x8c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
306 /* SATA Controller IDE (Lynx Point) */
307 { 0x8086, 0x8c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
308 /* SATA Controller IDE (Lynx Point) */
309 { 0x8086, 0x8c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
310 /* SATA Controller IDE (Lynx Point) */
311 { 0x8086, 0x8c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
312 /* SATA Controller IDE (Lynx Point-LP) */
313 { 0x8086, 0x9c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
314 /* SATA Controller IDE (Lynx Point-LP) */
315 { 0x8086, 0x9c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
316 /* SATA Controller IDE (Lynx Point-LP) */
317 { 0x8086, 0x9c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
318 /* SATA Controller IDE (Lynx Point-LP) */
319 { 0x8086, 0x9c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
320 /* SATA Controller IDE (DH89xxCC) */
321 { 0x8086, 0x2326, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
322 /* SATA Controller IDE (Avoton) */
323 { 0x8086, 0x1f20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
324 /* SATA Controller IDE (Avoton) */
325 { 0x8086, 0x1f21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
326 /* SATA Controller IDE (Avoton) */
327 { 0x8086, 0x1f30, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
328 /* SATA Controller IDE (Avoton) */
329 { 0x8086, 0x1f31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
330 /* SATA Controller IDE (Wellsburg) */
331 { 0x8086, 0x8d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
332 /* SATA Controller IDE (Wellsburg) */
333 { 0x8086, 0x8d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
334 /* SATA Controller IDE (Wellsburg) */
335 { 0x8086, 0x8d60, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
336 /* SATA Controller IDE (Wellsburg) */
337 { 0x8086, 0x8d68, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
338 /* SATA Controller IDE (BayTrail) */
339 { 0x8086, 0x0F20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_byt },
340 { 0x8086, 0x0F21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_byt },
341 /* SATA Controller IDE (Coleto Creek) */
342 { 0x8086, 0x23a6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
343
344 { } /* terminate list */
345 };
346
347 static const struct piix_map_db ich5_map_db = {
348 .mask = 0x7,
349 .port_enable = 0x3,
350 .map = {
351 /* PM PS SM SS MAP */
352 { P0, NA, P1, NA }, /* 000b */
353 { P1, NA, P0, NA }, /* 001b */
354 { RV, RV, RV, RV },
355 { RV, RV, RV, RV },
356 { P0, P1, IDE, IDE }, /* 100b */
357 { P1, P0, IDE, IDE }, /* 101b */
358 { IDE, IDE, P0, P1 }, /* 110b */
359 { IDE, IDE, P1, P0 }, /* 111b */
360 },
361 };
362
363 static const struct piix_map_db ich6_map_db = {
364 .mask = 0x3,
365 .port_enable = 0xf,
366 .map = {
367 /* PM PS SM SS MAP */
368 { P0, P2, P1, P3 }, /* 00b */
369 { IDE, IDE, P1, P3 }, /* 01b */
370 { P0, P2, IDE, IDE }, /* 10b */
371 { RV, RV, RV, RV },
372 },
373 };
374
375 static const struct piix_map_db ich6m_map_db = {
376 .mask = 0x3,
377 .port_enable = 0x5,
378
379 /* Map 01b isn't specified in the doc but some notebooks use
380 * it anyway. MAP 01b have been spotted on both ICH6M and
381 * ICH7M.
382 */
383 .map = {
384 /* PM PS SM SS MAP */
385 { P0, P2, NA, NA }, /* 00b */
386 { IDE, IDE, P1, P3 }, /* 01b */
387 { P0, P2, IDE, IDE }, /* 10b */
388 { RV, RV, RV, RV },
389 },
390 };
391
392 static const struct piix_map_db ich8_map_db = {
393 .mask = 0x3,
394 .port_enable = 0xf,
395 .map = {
396 /* PM PS SM SS MAP */
397 { P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
398 { RV, RV, RV, RV },
399 { P0, P2, IDE, IDE }, /* 10b (IDE mode) */
400 { RV, RV, RV, RV },
401 },
402 };
403
404 static const struct piix_map_db ich8_2port_map_db = {
405 .mask = 0x3,
406 .port_enable = 0x3,
407 .map = {
408 /* PM PS SM SS MAP */
409 { P0, NA, P1, NA }, /* 00b */
410 { RV, RV, RV, RV }, /* 01b */
411 { RV, RV, RV, RV }, /* 10b */
412 { RV, RV, RV, RV },
413 },
414 };
415
416 static const struct piix_map_db ich8m_apple_map_db = {
417 .mask = 0x3,
418 .port_enable = 0x1,
419 .map = {
420 /* PM PS SM SS MAP */
421 { P0, NA, NA, NA }, /* 00b */
422 { RV, RV, RV, RV },
423 { P0, P2, IDE, IDE }, /* 10b */
424 { RV, RV, RV, RV },
425 },
426 };
427
428 static const struct piix_map_db tolapai_map_db = {
429 .mask = 0x3,
430 .port_enable = 0x3,
431 .map = {
432 /* PM PS SM SS MAP */
433 { P0, NA, P1, NA }, /* 00b */
434 { RV, RV, RV, RV }, /* 01b */
435 { RV, RV, RV, RV }, /* 10b */
436 { RV, RV, RV, RV },
437 },
438 };
439
440 static const struct piix_map_db *piix_map_db_table[] = {
441 [ich5_sata] = &ich5_map_db,
442 [ich6_sata] = &ich6_map_db,
443 [ich6m_sata] = &ich6m_map_db,
444 [ich8_sata] = &ich8_map_db,
445 [ich8_2port_sata] = &ich8_2port_map_db,
446 [ich8m_apple_sata] = &ich8m_apple_map_db,
447 [tolapai_sata] = &tolapai_map_db,
448 [ich8_sata_snb] = &ich8_map_db,
449 [ich8_2port_sata_snb] = &ich8_2port_map_db,
450 [ich8_2port_sata_byt] = &ich8_2port_map_db,
451 };
452
453 static struct pci_bits piix_enable_bits[] = {
454 { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
455 { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
456 };
457
458 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
459 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
460 MODULE_LICENSE("GPL");
461 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
462 MODULE_VERSION(DRV_VERSION);
463
464 struct ich_laptop {
465 u16 device;
466 u16 subvendor;
467 u16 subdevice;
468 };
469
470 /*
471 * List of laptops that use short cables rather than 80 wire
472 */
473
474 static const struct ich_laptop ich_laptop[] = {
475 /* devid, subvendor, subdev */
476 { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
477 { 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
478 { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
479 { 0x27DF, 0x1028, 0x02b0 }, /* ICH7 on unknown Dell */
480 { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
481 { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
482 { 0x27DF, 0x103C, 0x361a }, /* ICH7 on unknown HP */
483 { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
484 { 0x27DF, 0x152D, 0x0778 }, /* ICH7 on unknown Intel */
485 { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
486 { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
487 { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
488 { 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
489 { 0x27df, 0x104d, 0x900e }, /* ICH7 on Sony TZ-90 */
490 /* end marker */
491 { 0, }
492 };
493
494 static int piix_port_start(struct ata_port *ap)
495 {
496 if (!(ap->flags & PIIX_FLAG_PIO16))
497 ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
498
499 return ata_bmdma_port_start(ap);
500 }
501
502 /**
503 * ich_pata_cable_detect - Probe host controller cable detect info
504 * @ap: Port for which cable detect info is desired
505 *
506 * Read 80c cable indicator from ATA PCI device's PCI config
507 * register. This register is normally set by firmware (BIOS).
508 *
509 * LOCKING:
510 * None (inherited from caller).
511 */
512
513 static int ich_pata_cable_detect(struct ata_port *ap)
514 {
515 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
516 struct piix_host_priv *hpriv = ap->host->private_data;
517 const struct ich_laptop *lap = &ich_laptop[0];
518 u8 mask;
519
520 /* Check for specials - Acer Aspire 5602WLMi */
521 while (lap->device) {
522 if (lap->device == pdev->device &&
523 lap->subvendor == pdev->subsystem_vendor &&
524 lap->subdevice == pdev->subsystem_device)
525 return ATA_CBL_PATA40_SHORT;
526
527 lap++;
528 }
529
530 /* check BIOS cable detect results */
531 mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
532 if ((hpriv->saved_iocfg & mask) == 0)
533 return ATA_CBL_PATA40;
534 return ATA_CBL_PATA80;
535 }
536
537 /**
538 * piix_pata_prereset - prereset for PATA host controller
539 * @link: Target link
540 * @deadline: deadline jiffies for the operation
541 *
542 * LOCKING:
543 * None (inherited from caller).
544 */
545 static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
546 {
547 struct ata_port *ap = link->ap;
548 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
549
550 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
551 return -ENOENT;
552 return ata_sff_prereset(link, deadline);
553 }
554
555 static DEFINE_SPINLOCK(piix_lock);
556
557 static void piix_set_timings(struct ata_port *ap, struct ata_device *adev,
558 u8 pio)
559 {
560 struct pci_dev *dev = to_pci_dev(ap->host->dev);
561 unsigned long flags;
562 unsigned int is_slave = (adev->devno != 0);
563 unsigned int master_port= ap->port_no ? 0x42 : 0x40;
564 unsigned int slave_port = 0x44;
565 u16 master_data;
566 u8 slave_data;
567 u8 udma_enable;
568 int control = 0;
569
570 /*
571 * See Intel Document 298600-004 for the timing programing rules
572 * for ICH controllers.
573 */
574
575 static const /* ISP RTC */
576 u8 timings[][2] = { { 0, 0 },
577 { 0, 0 },
578 { 1, 0 },
579 { 2, 1 },
580 { 2, 3 }, };
581
582 if (pio >= 2)
583 control |= 1; /* TIME1 enable */
584 if (ata_pio_need_iordy(adev))
585 control |= 2; /* IE enable */
586 /* Intel specifies that the PPE functionality is for disk only */
587 if (adev->class == ATA_DEV_ATA)
588 control |= 4; /* PPE enable */
589 /*
590 * If the drive MWDMA is faster than it can do PIO then
591 * we must force PIO into PIO0
592 */
593 if (adev->pio_mode < XFER_PIO_0 + pio)
594 /* Enable DMA timing only */
595 control |= 8; /* PIO cycles in PIO0 */
596
597 spin_lock_irqsave(&piix_lock, flags);
598
599 /* PIO configuration clears DTE unconditionally. It will be
600 * programmed in set_dmamode which is guaranteed to be called
601 * after set_piomode if any DMA mode is available.
602 */
603 pci_read_config_word(dev, master_port, &master_data);
604 if (is_slave) {
605 /* clear TIME1|IE1|PPE1|DTE1 */
606 master_data &= 0xff0f;
607 /* enable PPE1, IE1 and TIME1 as needed */
608 master_data |= (control << 4);
609 pci_read_config_byte(dev, slave_port, &slave_data);
610 slave_data &= (ap->port_no ? 0x0f : 0xf0);
611 /* Load the timing nibble for this slave */
612 slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
613 << (ap->port_no ? 4 : 0);
614 } else {
615 /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
616 master_data &= 0xccf0;
617 /* Enable PPE, IE and TIME as appropriate */
618 master_data |= control;
619 /* load ISP and RCT */
620 master_data |=
621 (timings[pio][0] << 12) |
622 (timings[pio][1] << 8);
623 }
624
625 /* Enable SITRE (separate slave timing register) */
626 master_data |= 0x4000;
627 pci_write_config_word(dev, master_port, master_data);
628 if (is_slave)
629 pci_write_config_byte(dev, slave_port, slave_data);
630
631 /* Ensure the UDMA bit is off - it will be turned back on if
632 UDMA is selected */
633
634 if (ap->udma_mask) {
635 pci_read_config_byte(dev, 0x48, &udma_enable);
636 udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
637 pci_write_config_byte(dev, 0x48, udma_enable);
638 }
639
640 spin_unlock_irqrestore(&piix_lock, flags);
641 }
642
643 /**
644 * piix_set_piomode - Initialize host controller PATA PIO timings
645 * @ap: Port whose timings we are configuring
646 * @adev: Drive in question
647 *
648 * Set PIO mode for device, in host controller PCI config space.
649 *
650 * LOCKING:
651 * None (inherited from caller).
652 */
653
654 static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
655 {
656 piix_set_timings(ap, adev, adev->pio_mode - XFER_PIO_0);
657 }
658
659 /**
660 * do_pata_set_dmamode - Initialize host controller PATA PIO timings
661 * @ap: Port whose timings we are configuring
662 * @adev: Drive in question
663 * @isich: set if the chip is an ICH device
664 *
665 * Set UDMA mode for device, in host controller PCI config space.
666 *
667 * LOCKING:
668 * None (inherited from caller).
669 */
670
671 static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
672 {
673 struct pci_dev *dev = to_pci_dev(ap->host->dev);
674 unsigned long flags;
675 u8 speed = adev->dma_mode;
676 int devid = adev->devno + 2 * ap->port_no;
677 u8 udma_enable = 0;
678
679 if (speed >= XFER_UDMA_0) {
680 unsigned int udma = speed - XFER_UDMA_0;
681 u16 udma_timing;
682 u16 ideconf;
683 int u_clock, u_speed;
684
685 spin_lock_irqsave(&piix_lock, flags);
686
687 pci_read_config_byte(dev, 0x48, &udma_enable);
688
689 /*
690 * UDMA is handled by a combination of clock switching and
691 * selection of dividers
692 *
693 * Handy rule: Odd modes are UDMATIMx 01, even are 02
694 * except UDMA0 which is 00
695 */
696 u_speed = min(2 - (udma & 1), udma);
697 if (udma == 5)
698 u_clock = 0x1000; /* 100Mhz */
699 else if (udma > 2)
700 u_clock = 1; /* 66Mhz */
701 else
702 u_clock = 0; /* 33Mhz */
703
704 udma_enable |= (1 << devid);
705
706 /* Load the CT/RP selection */
707 pci_read_config_word(dev, 0x4A, &udma_timing);
708 udma_timing &= ~(3 << (4 * devid));
709 udma_timing |= u_speed << (4 * devid);
710 pci_write_config_word(dev, 0x4A, udma_timing);
711
712 if (isich) {
713 /* Select a 33/66/100Mhz clock */
714 pci_read_config_word(dev, 0x54, &ideconf);
715 ideconf &= ~(0x1001 << devid);
716 ideconf |= u_clock << devid;
717 /* For ICH or later we should set bit 10 for better
718 performance (WR_PingPong_En) */
719 pci_write_config_word(dev, 0x54, ideconf);
720 }
721
722 pci_write_config_byte(dev, 0x48, udma_enable);
723
724 spin_unlock_irqrestore(&piix_lock, flags);
725 } else {
726 /* MWDMA is driven by the PIO timings. */
727 unsigned int mwdma = speed - XFER_MW_DMA_0;
728 const unsigned int needed_pio[3] = {
729 XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
730 };
731 int pio = needed_pio[mwdma] - XFER_PIO_0;
732
733 /* XFER_PIO_0 is never used currently */
734 piix_set_timings(ap, adev, pio);
735 }
736 }
737
738 /**
739 * piix_set_dmamode - Initialize host controller PATA DMA timings
740 * @ap: Port whose timings we are configuring
741 * @adev: um
742 *
743 * Set MW/UDMA mode for device, in host controller PCI config space.
744 *
745 * LOCKING:
746 * None (inherited from caller).
747 */
748
749 static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev)
750 {
751 do_pata_set_dmamode(ap, adev, 0);
752 }
753
754 /**
755 * ich_set_dmamode - Initialize host controller PATA DMA timings
756 * @ap: Port whose timings we are configuring
757 * @adev: um
758 *
759 * Set MW/UDMA mode for device, in host controller PCI config space.
760 *
761 * LOCKING:
762 * None (inherited from caller).
763 */
764
765 static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
766 {
767 do_pata_set_dmamode(ap, adev, 1);
768 }
769
770 /*
771 * Serial ATA Index/Data Pair Superset Registers access
772 *
773 * Beginning from ICH8, there's a sane way to access SCRs using index
774 * and data register pair located at BAR5 which means that we have
775 * separate SCRs for master and slave. This is handled using libata
776 * slave_link facility.
777 */
778 static const int piix_sidx_map[] = {
779 [SCR_STATUS] = 0,
780 [SCR_ERROR] = 2,
781 [SCR_CONTROL] = 1,
782 };
783
784 static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
785 {
786 struct ata_port *ap = link->ap;
787 struct piix_host_priv *hpriv = ap->host->private_data;
788
789 iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
790 hpriv->sidpr + PIIX_SIDPR_IDX);
791 }
792
793 static int piix_sidpr_scr_read(struct ata_link *link,
794 unsigned int reg, u32 *val)
795 {
796 struct piix_host_priv *hpriv = link->ap->host->private_data;
797
798 if (reg >= ARRAY_SIZE(piix_sidx_map))
799 return -EINVAL;
800
801 piix_sidpr_sel(link, reg);
802 *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
803 return 0;
804 }
805
806 static int piix_sidpr_scr_write(struct ata_link *link,
807 unsigned int reg, u32 val)
808 {
809 struct piix_host_priv *hpriv = link->ap->host->private_data;
810
811 if (reg >= ARRAY_SIZE(piix_sidx_map))
812 return -EINVAL;
813
814 piix_sidpr_sel(link, reg);
815 iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
816 return 0;
817 }
818
819 static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
820 unsigned hints)
821 {
822 return sata_link_scr_lpm(link, policy, false);
823 }
824
825 static bool piix_irq_check(struct ata_port *ap)
826 {
827 if (unlikely(!ap->ioaddr.bmdma_addr))
828 return false;
829
830 return ap->ops->bmdma_status(ap) & ATA_DMA_INTR;
831 }
832
833 #ifdef CONFIG_PM
834 static int piix_broken_suspend(void)
835 {
836 static const struct dmi_system_id sysids[] = {
837 {
838 .ident = "TECRA M3",
839 .matches = {
840 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
841 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
842 },
843 },
844 {
845 .ident = "TECRA M3",
846 .matches = {
847 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
848 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M3"),
849 },
850 },
851 {
852 .ident = "TECRA M4",
853 .matches = {
854 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
855 DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M4"),
856 },
857 },
858 {
859 .ident = "TECRA M4",
860 .matches = {
861 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
862 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
863 },
864 },
865 {
866 .ident = "TECRA M5",
867 .matches = {
868 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
869 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
870 },
871 },
872 {
873 .ident = "TECRA M6",
874 .matches = {
875 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
876 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M6"),
877 },
878 },
879 {
880 .ident = "TECRA M7",
881 .matches = {
882 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
883 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
884 },
885 },
886 {
887 .ident = "TECRA A8",
888 .matches = {
889 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
890 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A8"),
891 },
892 },
893 {
894 .ident = "Satellite R20",
895 .matches = {
896 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
897 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R20"),
898 },
899 },
900 {
901 .ident = "Satellite R25",
902 .matches = {
903 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
904 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R25"),
905 },
906 },
907 {
908 .ident = "Satellite U200",
909 .matches = {
910 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
911 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
912 },
913 },
914 {
915 .ident = "Satellite U200",
916 .matches = {
917 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
918 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U200"),
919 },
920 },
921 {
922 .ident = "Satellite Pro U200",
923 .matches = {
924 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
925 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE PRO U200"),
926 },
927 },
928 {
929 .ident = "Satellite U205",
930 .matches = {
931 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
932 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
933 },
934 },
935 {
936 .ident = "SATELLITE U205",
937 .matches = {
938 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
939 DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U205"),
940 },
941 },
942 {
943 .ident = "Satellite Pro A120",
944 .matches = {
945 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
946 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite Pro A120"),
947 },
948 },
949 {
950 .ident = "Portege M500",
951 .matches = {
952 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
953 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
954 },
955 },
956 {
957 .ident = "VGN-BX297XP",
958 .matches = {
959 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
960 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-BX297XP"),
961 },
962 },
963
964 { } /* terminate list */
965 };
966 static const char *oemstrs[] = {
967 "Tecra M3,",
968 };
969 int i;
970
971 if (dmi_check_system(sysids))
972 return 1;
973
974 for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
975 if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
976 return 1;
977
978 /* TECRA M4 sometimes forgets its identify and reports bogus
979 * DMI information. As the bogus information is a bit
980 * generic, match as many entries as possible. This manual
981 * matching is necessary because dmi_system_id.matches is
982 * limited to four entries.
983 */
984 if (dmi_match(DMI_SYS_VENDOR, "TOSHIBA") &&
985 dmi_match(DMI_PRODUCT_NAME, "000000") &&
986 dmi_match(DMI_PRODUCT_VERSION, "000000") &&
987 dmi_match(DMI_PRODUCT_SERIAL, "000000") &&
988 dmi_match(DMI_BOARD_VENDOR, "TOSHIBA") &&
989 dmi_match(DMI_BOARD_NAME, "Portable PC") &&
990 dmi_match(DMI_BOARD_VERSION, "Version A0"))
991 return 1;
992
993 return 0;
994 }
995
996 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
997 {
998 struct ata_host *host = pci_get_drvdata(pdev);
999 unsigned long flags;
1000 int rc = 0;
1001
1002 rc = ata_host_suspend(host, mesg);
1003 if (rc)
1004 return rc;
1005
1006 /* Some braindamaged ACPI suspend implementations expect the
1007 * controller to be awake on entry; otherwise, it burns cpu
1008 * cycles and power trying to do something to the sleeping
1009 * beauty.
1010 */
1011 if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) {
1012 pci_save_state(pdev);
1013
1014 /* mark its power state as "unknown", since we don't
1015 * know if e.g. the BIOS will change its device state
1016 * when we suspend.
1017 */
1018 if (pdev->current_state == PCI_D0)
1019 pdev->current_state = PCI_UNKNOWN;
1020
1021 /* tell resume that it's waking up from broken suspend */
1022 spin_lock_irqsave(&host->lock, flags);
1023 host->flags |= PIIX_HOST_BROKEN_SUSPEND;
1024 spin_unlock_irqrestore(&host->lock, flags);
1025 } else
1026 ata_pci_device_do_suspend(pdev, mesg);
1027
1028 return 0;
1029 }
1030
1031 static int piix_pci_device_resume(struct pci_dev *pdev)
1032 {
1033 struct ata_host *host = pci_get_drvdata(pdev);
1034 unsigned long flags;
1035 int rc;
1036
1037 if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
1038 spin_lock_irqsave(&host->lock, flags);
1039 host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
1040 spin_unlock_irqrestore(&host->lock, flags);
1041
1042 pci_set_power_state(pdev, PCI_D0);
1043 pci_restore_state(pdev);
1044
1045 /* PCI device wasn't disabled during suspend. Use
1046 * pci_reenable_device() to avoid affecting the enable
1047 * count.
1048 */
1049 rc = pci_reenable_device(pdev);
1050 if (rc)
1051 dev_err(&pdev->dev,
1052 "failed to enable device after resume (%d)\n",
1053 rc);
1054 } else
1055 rc = ata_pci_device_do_resume(pdev);
1056
1057 if (rc == 0)
1058 ata_host_resume(host);
1059
1060 return rc;
1061 }
1062 #endif
1063
1064 static u8 piix_vmw_bmdma_status(struct ata_port *ap)
1065 {
1066 return ata_bmdma_status(ap) & ~ATA_DMA_ERR;
1067 }
1068
1069 static struct scsi_host_template piix_sht = {
1070 ATA_BMDMA_SHT(DRV_NAME),
1071 };
1072
1073 static struct ata_port_operations piix_sata_ops = {
1074 .inherits = &ata_bmdma32_port_ops,
1075 .sff_irq_check = piix_irq_check,
1076 .port_start = piix_port_start,
1077 };
1078
1079 static struct ata_port_operations piix_pata_ops = {
1080 .inherits = &piix_sata_ops,
1081 .cable_detect = ata_cable_40wire,
1082 .set_piomode = piix_set_piomode,
1083 .set_dmamode = piix_set_dmamode,
1084 .prereset = piix_pata_prereset,
1085 };
1086
1087 static struct ata_port_operations piix_vmw_ops = {
1088 .inherits = &piix_pata_ops,
1089 .bmdma_status = piix_vmw_bmdma_status,
1090 };
1091
1092 static struct ata_port_operations ich_pata_ops = {
1093 .inherits = &piix_pata_ops,
1094 .cable_detect = ich_pata_cable_detect,
1095 .set_dmamode = ich_set_dmamode,
1096 };
1097
1098 static struct device_attribute *piix_sidpr_shost_attrs[] = {
1099 &dev_attr_link_power_management_policy,
1100 NULL
1101 };
1102
1103 static struct scsi_host_template piix_sidpr_sht = {
1104 ATA_BMDMA_SHT(DRV_NAME),
1105 .shost_attrs = piix_sidpr_shost_attrs,
1106 };
1107
1108 static struct ata_port_operations piix_sidpr_sata_ops = {
1109 .inherits = &piix_sata_ops,
1110 .hardreset = sata_std_hardreset,
1111 .scr_read = piix_sidpr_scr_read,
1112 .scr_write = piix_sidpr_scr_write,
1113 .set_lpm = piix_sidpr_set_lpm,
1114 };
1115
1116 static struct ata_port_info piix_port_info[] = {
1117 [piix_pata_mwdma] = /* PIIX3 MWDMA only */
1118 {
1119 .flags = PIIX_PATA_FLAGS,
1120 .pio_mask = ATA_PIO4,
1121 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
1122 .port_ops = &piix_pata_ops,
1123 },
1124
1125 [piix_pata_33] = /* PIIX4 at 33MHz */
1126 {
1127 .flags = PIIX_PATA_FLAGS,
1128 .pio_mask = ATA_PIO4,
1129 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
1130 .udma_mask = ATA_UDMA2,
1131 .port_ops = &piix_pata_ops,
1132 },
1133
1134 [ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
1135 {
1136 .flags = PIIX_PATA_FLAGS,
1137 .pio_mask = ATA_PIO4,
1138 .mwdma_mask = ATA_MWDMA12_ONLY, /* Check: maybe MWDMA0 is ok */
1139 .udma_mask = ATA_UDMA2,
1140 .port_ops = &ich_pata_ops,
1141 },
1142
1143 [ich_pata_66] = /* ICH controllers up to 66MHz */
1144 {
1145 .flags = PIIX_PATA_FLAGS,
1146 .pio_mask = ATA_PIO4,
1147 .mwdma_mask = ATA_MWDMA12_ONLY, /* MWDMA0 is broken on chip */
1148 .udma_mask = ATA_UDMA4,
1149 .port_ops = &ich_pata_ops,
1150 },
1151
1152 [ich_pata_100] =
1153 {
1154 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
1155 .pio_mask = ATA_PIO4,
1156 .mwdma_mask = ATA_MWDMA12_ONLY,
1157 .udma_mask = ATA_UDMA5,
1158 .port_ops = &ich_pata_ops,
1159 },
1160
1161 [ich_pata_100_nomwdma1] =
1162 {
1163 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
1164 .pio_mask = ATA_PIO4,
1165 .mwdma_mask = ATA_MWDMA2_ONLY,
1166 .udma_mask = ATA_UDMA5,
1167 .port_ops = &ich_pata_ops,
1168 },
1169
1170 [ich5_sata] =
1171 {
1172 .flags = PIIX_SATA_FLAGS,
1173 .pio_mask = ATA_PIO4,
1174 .mwdma_mask = ATA_MWDMA2,
1175 .udma_mask = ATA_UDMA6,
1176 .port_ops = &piix_sata_ops,
1177 },
1178
1179 [ich6_sata] =
1180 {
1181 .flags = PIIX_SATA_FLAGS,
1182 .pio_mask = ATA_PIO4,
1183 .mwdma_mask = ATA_MWDMA2,
1184 .udma_mask = ATA_UDMA6,
1185 .port_ops = &piix_sata_ops,
1186 },
1187
1188 [ich6m_sata] =
1189 {
1190 .flags = PIIX_SATA_FLAGS,
1191 .pio_mask = ATA_PIO4,
1192 .mwdma_mask = ATA_MWDMA2,
1193 .udma_mask = ATA_UDMA6,
1194 .port_ops = &piix_sata_ops,
1195 },
1196
1197 [ich8_sata] =
1198 {
1199 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
1200 .pio_mask = ATA_PIO4,
1201 .mwdma_mask = ATA_MWDMA2,
1202 .udma_mask = ATA_UDMA6,
1203 .port_ops = &piix_sata_ops,
1204 },
1205
1206 [ich8_2port_sata] =
1207 {
1208 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
1209 .pio_mask = ATA_PIO4,
1210 .mwdma_mask = ATA_MWDMA2,
1211 .udma_mask = ATA_UDMA6,
1212 .port_ops = &piix_sata_ops,
1213 },
1214
1215 [tolapai_sata] =
1216 {
1217 .flags = PIIX_SATA_FLAGS,
1218 .pio_mask = ATA_PIO4,
1219 .mwdma_mask = ATA_MWDMA2,
1220 .udma_mask = ATA_UDMA6,
1221 .port_ops = &piix_sata_ops,
1222 },
1223
1224 [ich8m_apple_sata] =
1225 {
1226 .flags = PIIX_SATA_FLAGS,
1227 .pio_mask = ATA_PIO4,
1228 .mwdma_mask = ATA_MWDMA2,
1229 .udma_mask = ATA_UDMA6,
1230 .port_ops = &piix_sata_ops,
1231 },
1232
1233 [piix_pata_vmw] =
1234 {
1235 .flags = PIIX_PATA_FLAGS,
1236 .pio_mask = ATA_PIO4,
1237 .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
1238 .udma_mask = ATA_UDMA2,
1239 .port_ops = &piix_vmw_ops,
1240 },
1241
1242 /*
1243 * some Sandybridge chipsets have broken 32 mode up to now,
1244 * see https://bugzilla.kernel.org/show_bug.cgi?id=40592
1245 */
1246 [ich8_sata_snb] =
1247 {
1248 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
1249 .pio_mask = ATA_PIO4,
1250 .mwdma_mask = ATA_MWDMA2,
1251 .udma_mask = ATA_UDMA6,
1252 .port_ops = &piix_sata_ops,
1253 },
1254
1255 [ich8_2port_sata_snb] =
1256 {
1257 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR
1258 | PIIX_FLAG_PIO16,
1259 .pio_mask = ATA_PIO4,
1260 .mwdma_mask = ATA_MWDMA2,
1261 .udma_mask = ATA_UDMA6,
1262 .port_ops = &piix_sata_ops,
1263 },
1264
1265 [ich8_2port_sata_byt] =
1266 {
1267 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
1268 .pio_mask = ATA_PIO4,
1269 .mwdma_mask = ATA_MWDMA2,
1270 .udma_mask = ATA_UDMA6,
1271 .port_ops = &piix_sata_ops,
1272 },
1273
1274 };
1275
1276 #define AHCI_PCI_BAR 5
1277 #define AHCI_GLOBAL_CTL 0x04
1278 #define AHCI_ENABLE (1 << 31)
1279 static int piix_disable_ahci(struct pci_dev *pdev)
1280 {
1281 void __iomem *mmio;
1282 u32 tmp;
1283 int rc = 0;
1284
1285 /* BUG: pci_enable_device has not yet been called. This
1286 * works because this device is usually set up by BIOS.
1287 */
1288
1289 if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
1290 !pci_resource_len(pdev, AHCI_PCI_BAR))
1291 return 0;
1292
1293 mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
1294 if (!mmio)
1295 return -ENOMEM;
1296
1297 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1298 if (tmp & AHCI_ENABLE) {
1299 tmp &= ~AHCI_ENABLE;
1300 iowrite32(tmp, mmio + AHCI_GLOBAL_CTL);
1301
1302 tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
1303 if (tmp & AHCI_ENABLE)
1304 rc = -EIO;
1305 }
1306
1307 pci_iounmap(pdev, mmio);
1308 return rc;
1309 }
1310
1311 /**
1312 * piix_check_450nx_errata - Check for problem 450NX setup
1313 * @ata_dev: the PCI device to check
1314 *
1315 * Check for the present of 450NX errata #19 and errata #25. If
1316 * they are found return an error code so we can turn off DMA
1317 */
1318
1319 static int piix_check_450nx_errata(struct pci_dev *ata_dev)
1320 {
1321 struct pci_dev *pdev = NULL;
1322 u16 cfg;
1323 int no_piix_dma = 0;
1324
1325 while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
1326 /* Look for 450NX PXB. Check for problem configurations
1327 A PCI quirk checks bit 6 already */
1328 pci_read_config_word(pdev, 0x41, &cfg);
1329 /* Only on the original revision: IDE DMA can hang */
1330 if (pdev->revision == 0x00)
1331 no_piix_dma = 1;
1332 /* On all revisions below 5 PXB bus lock must be disabled for IDE */
1333 else if (cfg & (1<<14) && pdev->revision < 5)
1334 no_piix_dma = 2;
1335 }
1336 if (no_piix_dma)
1337 dev_warn(&ata_dev->dev,
1338 "450NX errata present, disabling IDE DMA%s\n",
1339 no_piix_dma == 2 ? " - a BIOS update may resolve this"
1340 : "");
1341
1342 return no_piix_dma;
1343 }
1344
1345 static void piix_init_pcs(struct ata_host *host,
1346 const struct piix_map_db *map_db)
1347 {
1348 struct pci_dev *pdev = to_pci_dev(host->dev);
1349 u16 pcs, new_pcs;
1350
1351 pci_read_config_word(pdev, ICH5_PCS, &pcs);
1352
1353 new_pcs = pcs | map_db->port_enable;
1354
1355 if (new_pcs != pcs) {
1356 DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
1357 pci_write_config_word(pdev, ICH5_PCS, new_pcs);
1358 msleep(150);
1359 }
1360 }
1361
1362 static const int *piix_init_sata_map(struct pci_dev *pdev,
1363 struct ata_port_info *pinfo,
1364 const struct piix_map_db *map_db)
1365 {
1366 const int *map;
1367 int i, invalid_map = 0;
1368 u8 map_value;
1369
1370 pci_read_config_byte(pdev, ICH5_PMR, &map_value);
1371
1372 map = map_db->map[map_value & map_db->mask];
1373
1374 dev_info(&pdev->dev, "MAP [");
1375 for (i = 0; i < 4; i++) {
1376 switch (map[i]) {
1377 case RV:
1378 invalid_map = 1;
1379 pr_cont(" XX");
1380 break;
1381
1382 case NA:
1383 pr_cont(" --");
1384 break;
1385
1386 case IDE:
1387 WARN_ON((i & 1) || map[i + 1] != IDE);
1388 pinfo[i / 2] = piix_port_info[ich_pata_100];
1389 i++;
1390 pr_cont(" IDE IDE");
1391 break;
1392
1393 default:
1394 pr_cont(" P%d", map[i]);
1395 if (i & 1)
1396 pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
1397 break;
1398 }
1399 }
1400 pr_cont(" ]\n");
1401
1402 if (invalid_map)
1403 dev_err(&pdev->dev, "invalid MAP value %u\n", map_value);
1404
1405 return map;
1406 }
1407
1408 static bool piix_no_sidpr(struct ata_host *host)
1409 {
1410 struct pci_dev *pdev = to_pci_dev(host->dev);
1411
1412 /*
1413 * Samsung DB-P70 only has three ATA ports exposed and
1414 * curiously the unconnected first port reports link online
1415 * while not responding to SRST protocol causing excessive
1416 * detection delay.
1417 *
1418 * Unfortunately, the system doesn't carry enough DMI
1419 * information to identify the machine but does have subsystem
1420 * vendor and device set. As it's unclear whether the
1421 * subsystem vendor/device is used only for this specific
1422 * board, the port can't be disabled solely with the
1423 * information; however, turning off SIDPR access works around
1424 * the problem. Turn it off.
1425 *
1426 * This problem is reported in bnc#441240.
1427 *
1428 * https://bugzilla.novell.com/show_bug.cgi?id=441420
1429 */
1430 if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
1431 pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
1432 pdev->subsystem_device == 0xb049) {
1433 dev_warn(host->dev,
1434 "Samsung DB-P70 detected, disabling SIDPR\n");
1435 return true;
1436 }
1437
1438 return false;
1439 }
1440
1441 static int piix_init_sidpr(struct ata_host *host)
1442 {
1443 struct pci_dev *pdev = to_pci_dev(host->dev);
1444 struct piix_host_priv *hpriv = host->private_data;
1445 struct ata_link *link0 = &host->ports[0]->link;
1446 u32 scontrol;
1447 int i, rc;
1448
1449 /* check for availability */
1450 for (i = 0; i < 4; i++)
1451 if (hpriv->map[i] == IDE)
1452 return 0;
1453
1454 /* is it blacklisted? */
1455 if (piix_no_sidpr(host))
1456 return 0;
1457
1458 if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
1459 return 0;
1460
1461 if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
1462 pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
1463 return 0;
1464
1465 if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
1466 return 0;
1467
1468 hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
1469
1470 /* SCR access via SIDPR doesn't work on some configurations.
1471 * Give it a test drive by inhibiting power save modes which
1472 * we'll do anyway.
1473 */
1474 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1475
1476 /* if IPM is already 3, SCR access is probably working. Don't
1477 * un-inhibit power save modes as BIOS might have inhibited
1478 * them for a reason.
1479 */
1480 if ((scontrol & 0xf00) != 0x300) {
1481 scontrol |= 0x300;
1482 piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
1483 piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
1484
1485 if ((scontrol & 0xf00) != 0x300) {
1486 dev_info(host->dev,
1487 "SCR access via SIDPR is available but doesn't work\n");
1488 return 0;
1489 }
1490 }
1491
1492 /* okay, SCRs available, set ops and ask libata for slave_link */
1493 for (i = 0; i < 2; i++) {
1494 struct ata_port *ap = host->ports[i];
1495
1496 ap->ops = &piix_sidpr_sata_ops;
1497
1498 if (ap->flags & ATA_FLAG_SLAVE_POSS) {
1499 rc = ata_slave_link_init(ap);
1500 if (rc)
1501 return rc;
1502 }
1503 }
1504
1505 return 0;
1506 }
1507
1508 static void piix_iocfg_bit18_quirk(struct ata_host *host)
1509 {
1510 static const struct dmi_system_id sysids[] = {
1511 {
1512 /* Clevo M570U sets IOCFG bit 18 if the cdrom
1513 * isn't used to boot the system which
1514 * disables the channel.
1515 */
1516 .ident = "M570U",
1517 .matches = {
1518 DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
1520 },
1521 },
1522
1523 { } /* terminate list */
1524 };
1525 struct pci_dev *pdev = to_pci_dev(host->dev);
1526 struct piix_host_priv *hpriv = host->private_data;
1527
1528 if (!dmi_check_system(sysids))
1529 return;
1530
1531 /* The datasheet says that bit 18 is NOOP but certain systems
1532 * seem to use it to disable a channel. Clear the bit on the
1533 * affected systems.
1534 */
1535 if (hpriv->saved_iocfg & (1 << 18)) {
1536 dev_info(&pdev->dev, "applying IOCFG bit18 quirk\n");
1537 pci_write_config_dword(pdev, PIIX_IOCFG,
1538 hpriv->saved_iocfg & ~(1 << 18));
1539 }
1540 }
1541
1542 static bool piix_broken_system_poweroff(struct pci_dev *pdev)
1543 {
1544 static const struct dmi_system_id broken_systems[] = {
1545 {
1546 .ident = "HP Compaq 2510p",
1547 .matches = {
1548 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1549 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
1550 },
1551 /* PCI slot number of the controller */
1552 .driver_data = (void *)0x1FUL,
1553 },
1554 {
1555 .ident = "HP Compaq nc6000",
1556 .matches = {
1557 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1558 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nc6000"),
1559 },
1560 /* PCI slot number of the controller */
1561 .driver_data = (void *)0x1FUL,
1562 },
1563
1564 { } /* terminate list */
1565 };
1566 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
1567
1568 if (dmi) {
1569 unsigned long slot = (unsigned long)dmi->driver_data;
1570 /* apply the quirk only to on-board controllers */
1571 return slot == PCI_SLOT(pdev->devfn);
1572 }
1573
1574 return false;
1575 }
1576
1577 static int prefer_ms_hyperv = 1;
1578 module_param(prefer_ms_hyperv, int, 0);
1579 MODULE_PARM_DESC(prefer_ms_hyperv,
1580 "Prefer Hyper-V paravirtualization drivers instead of ATA, "
1581 "0 - Use ATA drivers, "
1582 "1 (Default) - Use the paravirtualization drivers.");
1583
1584 static void piix_ignore_devices_quirk(struct ata_host *host)
1585 {
1586 #if IS_ENABLED(CONFIG_HYPERV_STORAGE)
1587 static const struct dmi_system_id ignore_hyperv[] = {
1588 {
1589 /* On Hyper-V hypervisors the disks are exposed on
1590 * both the emulated SATA controller and on the
1591 * paravirtualised drivers. The CD/DVD devices
1592 * are only exposed on the emulated controller.
1593 * Request we ignore ATA devices on this host.
1594 */
1595 .ident = "Hyper-V Virtual Machine",
1596 .matches = {
1597 DMI_MATCH(DMI_SYS_VENDOR,
1598 "Microsoft Corporation"),
1599 DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
1600 },
1601 },
1602 { } /* terminate list */
1603 };
1604 static const struct dmi_system_id allow_virtual_pc[] = {
1605 {
1606 /* In MS Virtual PC guests the DMI ident is nearly
1607 * identical to a Hyper-V guest. One difference is the
1608 * product version which is used here to identify
1609 * a Virtual PC guest. This entry allows ata_piix to
1610 * drive the emulated hardware.
1611 */
1612 .ident = "MS Virtual PC 2007",
1613 .matches = {
1614 DMI_MATCH(DMI_SYS_VENDOR,
1615 "Microsoft Corporation"),
1616 DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
1617 DMI_MATCH(DMI_PRODUCT_VERSION, "VS2005R2"),
1618 },
1619 },
1620 { } /* terminate list */
1621 };
1622 const struct dmi_system_id *ignore = dmi_first_match(ignore_hyperv);
1623 const struct dmi_system_id *allow = dmi_first_match(allow_virtual_pc);
1624
1625 if (ignore && !allow && prefer_ms_hyperv) {
1626 host->flags |= ATA_HOST_IGNORE_ATA;
1627 dev_info(host->dev, "%s detected, ATA device ignore set\n",
1628 ignore->ident);
1629 }
1630 #endif
1631 }
1632
1633 /**
1634 * piix_init_one - Register PIIX ATA PCI device with kernel services
1635 * @pdev: PCI device to register
1636 * @ent: Entry in piix_pci_tbl matching with @pdev
1637 *
1638 * Called from kernel PCI layer. We probe for combined mode (sigh),
1639 * and then hand over control to libata, for it to do the rest.
1640 *
1641 * LOCKING:
1642 * Inherited from PCI layer (may sleep).
1643 *
1644 * RETURNS:
1645 * Zero on success, or -ERRNO value.
1646 */
1647
1648 static int piix_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1649 {
1650 struct device *dev = &pdev->dev;
1651 struct ata_port_info port_info[2];
1652 const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
1653 struct scsi_host_template *sht = &piix_sht;
1654 unsigned long port_flags;
1655 struct ata_host *host;
1656 struct piix_host_priv *hpriv;
1657 int rc;
1658
1659 ata_print_version_once(&pdev->dev, DRV_VERSION);
1660
1661 /* no hotplugging support for later devices (FIXME) */
1662 if (!in_module_init && ent->driver_data >= ich5_sata)
1663 return -ENODEV;
1664
1665 if (piix_broken_system_poweroff(pdev)) {
1666 piix_port_info[ent->driver_data].flags |=
1667 ATA_FLAG_NO_POWEROFF_SPINDOWN |
1668 ATA_FLAG_NO_HIBERNATE_SPINDOWN;
1669 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
1670 "on poweroff and hibernation\n");
1671 }
1672
1673 port_info[0] = piix_port_info[ent->driver_data];
1674 port_info[1] = piix_port_info[ent->driver_data];
1675
1676 port_flags = port_info[0].flags;
1677
1678 /* enable device and prepare host */
1679 rc = pcim_enable_device(pdev);
1680 if (rc)
1681 return rc;
1682
1683 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1684 if (!hpriv)
1685 return -ENOMEM;
1686
1687 /* Save IOCFG, this will be used for cable detection, quirk
1688 * detection and restoration on detach. This is necessary
1689 * because some ACPI implementations mess up cable related
1690 * bits on _STM. Reported on kernel bz#11879.
1691 */
1692 pci_read_config_dword(pdev, PIIX_IOCFG, &hpriv->saved_iocfg);
1693
1694 /* ICH6R may be driven by either ata_piix or ahci driver
1695 * regardless of BIOS configuration. Make sure AHCI mode is
1696 * off.
1697 */
1698 if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
1699 rc = piix_disable_ahci(pdev);
1700 if (rc)
1701 return rc;
1702 }
1703
1704 /* SATA map init can change port_info, do it before prepping host */
1705 if (port_flags & ATA_FLAG_SATA)
1706 hpriv->map = piix_init_sata_map(pdev, port_info,
1707 piix_map_db_table[ent->driver_data]);
1708
1709 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
1710 if (rc)
1711 return rc;
1712 host->private_data = hpriv;
1713
1714 /* initialize controller */
1715 if (port_flags & ATA_FLAG_SATA) {
1716 piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
1717 rc = piix_init_sidpr(host);
1718 if (rc)
1719 return rc;
1720 if (host->ports[0]->ops == &piix_sidpr_sata_ops)
1721 sht = &piix_sidpr_sht;
1722 }
1723
1724 /* apply IOCFG bit18 quirk */
1725 piix_iocfg_bit18_quirk(host);
1726
1727 /* On ICH5, some BIOSen disable the interrupt using the
1728 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
1729 * On ICH6, this bit has the same effect, but only when
1730 * MSI is disabled (and it is disabled, as we don't use
1731 * message-signalled interrupts currently).
1732 */
1733 if (port_flags & PIIX_FLAG_CHECKINTR)
1734 pci_intx(pdev, 1);
1735
1736 if (piix_check_450nx_errata(pdev)) {
1737 /* This writes into the master table but it does not
1738 really matter for this errata as we will apply it to
1739 all the PIIX devices on the board */
1740 host->ports[0]->mwdma_mask = 0;
1741 host->ports[0]->udma_mask = 0;
1742 host->ports[1]->mwdma_mask = 0;
1743 host->ports[1]->udma_mask = 0;
1744 }
1745 host->flags |= ATA_HOST_PARALLEL_SCAN;
1746
1747 /* Allow hosts to specify device types to ignore when scanning. */
1748 piix_ignore_devices_quirk(host);
1749
1750 pci_set_master(pdev);
1751 return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
1752 }
1753
1754 static void piix_remove_one(struct pci_dev *pdev)
1755 {
1756 struct ata_host *host = pci_get_drvdata(pdev);
1757 struct piix_host_priv *hpriv = host->private_data;
1758
1759 pci_write_config_dword(pdev, PIIX_IOCFG, hpriv->saved_iocfg);
1760
1761 ata_pci_remove_one(pdev);
1762 }
1763
1764 static struct pci_driver piix_pci_driver = {
1765 .name = DRV_NAME,
1766 .id_table = piix_pci_tbl,
1767 .probe = piix_init_one,
1768 .remove = piix_remove_one,
1769 #ifdef CONFIG_PM
1770 .suspend = piix_pci_device_suspend,
1771 .resume = piix_pci_device_resume,
1772 #endif
1773 };
1774
1775 static int __init piix_init(void)
1776 {
1777 int rc;
1778
1779 DPRINTK("pci_register_driver\n");
1780 rc = pci_register_driver(&piix_pci_driver);
1781 if (rc)
1782 return rc;
1783
1784 in_module_init = 0;
1785
1786 DPRINTK("done\n");
1787 return 0;
1788 }
1789
1790 static void __exit piix_exit(void)
1791 {
1792 pci_unregister_driver(&piix_pci_driver);
1793 }
1794
1795 module_init(piix_init);
1796 module_exit(piix_exit);
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