2 * ata_piix.c - Intel PATA/SATA controllers
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2003-2005 Red Hat Inc
10 * Copyright 2003-2005 Jeff Garzik
13 * Copyright header from piix.c:
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 <alan@redhat.com>
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)
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.
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.
35 * libata documentation is available via 'make {ps|pdf}docs',
36 * as Documentation/DocBook/libata.*
38 * Hardware documentation available at http://developer.intel.com/
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.
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.
57 * PIIX4 errata #9 - Only on ultra obscure hw
58 * ICH3 errata #13 - Not observed to affect real hw
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
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
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>
95 #define DRV_NAME "ata_piix"
96 #define DRV_VERSION "2.00ac7"
99 PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
100 ICH5_PMR = 0x90, /* port mapping register */
101 ICH5_PCS = 0x92, /* port control and status */
102 PIIX_SCC = 0x0A, /* sub-class code register */
104 PIIX_FLAG_SCR = (1 << 26), /* SCR available */
105 PIIX_FLAG_AHCI = (1 << 27), /* AHCI possible */
106 PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
108 PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
109 PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
111 /* combined mode. if set, PATA is channel 0.
112 * if clear, PATA is channel 1.
114 PIIX_PORT_ENABLED = (1 << 0),
115 PIIX_PORT_PRESENT = (1 << 4),
117 PIIX_80C_PRI = (1 << 5) | (1 << 4),
118 PIIX_80C_SEC = (1 << 7) | (1 << 6),
121 piix_pata_33 = 0, /* PIIX3 or 4 at 33Mhz */
122 ich_pata_33 = 1, /* ICH up to UDMA 33 only */
123 ich_pata_66 = 2, /* ICH up to 66 Mhz */
124 ich_pata_100 = 3, /* ICH up to UDMA 100 */
125 ich_pata_133 = 4, /* ICH up to UDMA 133 */
132 /* constants for mapping table */
138 NA = -2, /* not avaliable */
139 RV = -3, /* reserved */
141 PIIX_AHCI_DEVICE = 6,
146 const u16 port_enable;
150 struct piix_host_priv {
154 static int piix_init_one (struct pci_dev *pdev,
155 const struct pci_device_id *ent);
156 static void piix_host_stop(struct ata_host *host);
157 static void piix_pata_error_handler(struct ata_port *ap);
158 static void ich_pata_error_handler(struct ata_port *ap);
159 static void piix_sata_error_handler(struct ata_port *ap);
160 static void piix_set_piomode (struct ata_port *ap, struct ata_device *adev);
161 static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev);
162 static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev);
164 static unsigned int in_module_init = 1;
166 static const struct pci_device_id piix_pci_tbl[] = {
167 #ifdef ATA_ENABLE_PATA
168 /* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
169 /* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
170 { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
171 { 0x8086, 0x24db, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
172 { 0x8086, 0x25a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
174 { 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
176 { 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
178 { 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
179 /* Intel ICH (i810, i815, i840) UDMA 66*/
180 { 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
181 /* Intel ICH0 : UDMA 33*/
182 { 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
184 { 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
185 /* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
186 { 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
188 { 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
189 /* Intel ICH3 (E7500/1) UDMA 100 */
190 { 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
191 /* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
192 { 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
193 { 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
195 { 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_133 },
197 { 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
198 /* ESB (855GME/875P + 6300ESB) UDMA 100 */
199 { 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
200 /* ICH6 (and 6) (i915) UDMA 100 */
201 { 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
202 /* ICH7/7-R (i945, i975) UDMA 100*/
203 { 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_133 },
204 { 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
207 /* NOTE: The following PCI ids must be kept in sync with the
208 * list in drivers/pci/quirks.c.
212 { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
214 { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
215 /* 6300ESB (ICH5 variant with broken PCS present bits) */
216 { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
217 /* 6300ESB pretending RAID */
218 { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
219 /* 82801FB/FW (ICH6/ICH6W) */
220 { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
221 /* 82801FR/FRW (ICH6R/ICH6RW) */
222 { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
223 /* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented) */
224 { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
225 /* 82801GB/GR/GH (ICH7, identical to ICH6) */
226 { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
227 /* 2801GBM/GHM (ICH7M, identical to ICH6M) */
228 { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
229 /* Enterprise Southbridge 2 (where's the datasheet?) */
230 { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
231 /* SATA Controller 1 IDE (ICH8, no datasheet yet) */
232 { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
233 /* SATA Controller 2 IDE (ICH8, ditto) */
234 { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
235 /* Mobile SATA Controller IDE (ICH8M, ditto) */
236 { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
238 { } /* terminate list */
241 static struct pci_driver piix_pci_driver = {
243 .id_table = piix_pci_tbl,
244 .probe = piix_init_one,
245 .remove = ata_pci_remove_one,
246 .suspend = ata_pci_device_suspend,
247 .resume = ata_pci_device_resume,
250 static struct scsi_host_template piix_sht = {
251 .module = THIS_MODULE,
253 .ioctl = ata_scsi_ioctl,
254 .queuecommand = ata_scsi_queuecmd,
255 .can_queue = ATA_DEF_QUEUE,
256 .this_id = ATA_SHT_THIS_ID,
257 .sg_tablesize = LIBATA_MAX_PRD,
258 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
259 .emulated = ATA_SHT_EMULATED,
260 .use_clustering = ATA_SHT_USE_CLUSTERING,
261 .proc_name = DRV_NAME,
262 .dma_boundary = ATA_DMA_BOUNDARY,
263 .slave_configure = ata_scsi_slave_config,
264 .slave_destroy = ata_scsi_slave_destroy,
265 .bios_param = ata_std_bios_param,
266 .resume = ata_scsi_device_resume,
267 .suspend = ata_scsi_device_suspend,
270 static const struct ata_port_operations piix_pata_ops = {
271 .port_disable = ata_port_disable,
272 .set_piomode = piix_set_piomode,
273 .set_dmamode = piix_set_dmamode,
274 .mode_filter = ata_pci_default_filter,
276 .tf_load = ata_tf_load,
277 .tf_read = ata_tf_read,
278 .check_status = ata_check_status,
279 .exec_command = ata_exec_command,
280 .dev_select = ata_std_dev_select,
282 .bmdma_setup = ata_bmdma_setup,
283 .bmdma_start = ata_bmdma_start,
284 .bmdma_stop = ata_bmdma_stop,
285 .bmdma_status = ata_bmdma_status,
286 .qc_prep = ata_qc_prep,
287 .qc_issue = ata_qc_issue_prot,
288 .data_xfer = ata_pio_data_xfer,
290 .freeze = ata_bmdma_freeze,
291 .thaw = ata_bmdma_thaw,
292 .error_handler = piix_pata_error_handler,
293 .post_internal_cmd = ata_bmdma_post_internal_cmd,
295 .irq_handler = ata_interrupt,
296 .irq_clear = ata_bmdma_irq_clear,
298 .port_start = ata_port_start,
299 .port_stop = ata_port_stop,
300 .host_stop = piix_host_stop,
303 static const struct ata_port_operations ich_pata_ops = {
304 .port_disable = ata_port_disable,
305 .set_piomode = piix_set_piomode,
306 .set_dmamode = ich_set_dmamode,
307 .mode_filter = ata_pci_default_filter,
309 .tf_load = ata_tf_load,
310 .tf_read = ata_tf_read,
311 .check_status = ata_check_status,
312 .exec_command = ata_exec_command,
313 .dev_select = ata_std_dev_select,
315 .bmdma_setup = ata_bmdma_setup,
316 .bmdma_start = ata_bmdma_start,
317 .bmdma_stop = ata_bmdma_stop,
318 .bmdma_status = ata_bmdma_status,
319 .qc_prep = ata_qc_prep,
320 .qc_issue = ata_qc_issue_prot,
321 .data_xfer = ata_pio_data_xfer,
323 .freeze = ata_bmdma_freeze,
324 .thaw = ata_bmdma_thaw,
325 .error_handler = ich_pata_error_handler,
326 .post_internal_cmd = ata_bmdma_post_internal_cmd,
328 .irq_handler = ata_interrupt,
329 .irq_clear = ata_bmdma_irq_clear,
331 .port_start = ata_port_start,
332 .port_stop = ata_port_stop,
333 .host_stop = ata_host_stop,
336 static const struct ata_port_operations piix_sata_ops = {
337 .port_disable = ata_port_disable,
339 .tf_load = ata_tf_load,
340 .tf_read = ata_tf_read,
341 .check_status = ata_check_status,
342 .exec_command = ata_exec_command,
343 .dev_select = ata_std_dev_select,
345 .bmdma_setup = ata_bmdma_setup,
346 .bmdma_start = ata_bmdma_start,
347 .bmdma_stop = ata_bmdma_stop,
348 .bmdma_status = ata_bmdma_status,
349 .qc_prep = ata_qc_prep,
350 .qc_issue = ata_qc_issue_prot,
351 .data_xfer = ata_pio_data_xfer,
353 .freeze = ata_bmdma_freeze,
354 .thaw = ata_bmdma_thaw,
355 .error_handler = piix_sata_error_handler,
356 .post_internal_cmd = ata_bmdma_post_internal_cmd,
358 .irq_handler = ata_interrupt,
359 .irq_clear = ata_bmdma_irq_clear,
361 .port_start = ata_port_start,
362 .port_stop = ata_port_stop,
363 .host_stop = piix_host_stop,
366 static const struct piix_map_db ich5_map_db = {
370 /* PM PS SM SS MAP */
371 { P0, NA, P1, NA }, /* 000b */
372 { P1, NA, P0, NA }, /* 001b */
375 { P0, P1, IDE, IDE }, /* 100b */
376 { P1, P0, IDE, IDE }, /* 101b */
377 { IDE, IDE, P0, P1 }, /* 110b */
378 { IDE, IDE, P1, P0 }, /* 111b */
382 static const struct piix_map_db ich6_map_db = {
386 /* PM PS SM SS MAP */
387 { P0, P2, P1, P3 }, /* 00b */
388 { IDE, IDE, P1, P3 }, /* 01b */
389 { P0, P2, IDE, IDE }, /* 10b */
394 static const struct piix_map_db ich6m_map_db = {
398 /* Map 01b isn't specified in the doc but some notebooks use
399 * it anyway. MAP 01b have been spotted on both ICH6M and
403 /* PM PS SM SS MAP */
404 { P0, P2, RV, RV }, /* 00b */
405 { IDE, IDE, P1, P3 }, /* 01b */
406 { P0, P2, IDE, IDE }, /* 10b */
411 static const struct piix_map_db ich8_map_db = {
415 /* PM PS SM SS MAP */
416 { P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
418 { IDE, IDE, NA, NA }, /* 10b (IDE mode) */
423 static const struct piix_map_db *piix_map_db_table[] = {
424 [ich5_sata] = &ich5_map_db,
425 [ich6_sata] = &ich6_map_db,
426 [ich6_sata_ahci] = &ich6_map_db,
427 [ich6m_sata_ahci] = &ich6m_map_db,
428 [ich8_sata_ahci] = &ich8_map_db,
431 static struct ata_port_info piix_port_info[] = {
432 /* piix_pata_33: 0: PIIX3 or 4 at 33MHz */
435 .flags = PIIX_PATA_FLAGS,
436 .pio_mask = 0x1f, /* pio0-4 */
437 .mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
438 .udma_mask = ATA_UDMA_MASK_40C,
439 .port_ops = &piix_pata_ops,
442 /* ich_pata_33: 1 ICH0 - ICH at 33Mhz*/
445 .flags = PIIX_PATA_FLAGS,
446 .pio_mask = 0x1f, /* pio 0-4 */
447 .mwdma_mask = 0x06, /* Check: maybe 0x07 */
448 .udma_mask = ATA_UDMA2, /* UDMA33 */
449 .port_ops = &ich_pata_ops,
451 /* ich_pata_66: 2 ICH controllers up to 66MHz */
454 .flags = PIIX_PATA_FLAGS,
455 .pio_mask = 0x1f, /* pio 0-4 */
456 .mwdma_mask = 0x06, /* MWDMA0 is broken on chip */
457 .udma_mask = ATA_UDMA4,
458 .port_ops = &ich_pata_ops,
461 /* ich_pata_100: 3 */
464 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
465 .pio_mask = 0x1f, /* pio0-4 */
466 .mwdma_mask = 0x06, /* mwdma1-2 */
467 .udma_mask = ATA_UDMA5, /* udma0-5 */
468 .port_ops = &ich_pata_ops,
471 /* ich_pata_133: 4 ICH with full UDMA6 */
474 .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
475 .pio_mask = 0x1f, /* pio 0-4 */
476 .mwdma_mask = 0x06, /* Check: maybe 0x07 */
477 .udma_mask = ATA_UDMA6, /* UDMA133 */
478 .port_ops = &ich_pata_ops,
484 .flags = PIIX_SATA_FLAGS,
485 .pio_mask = 0x1f, /* pio0-4 */
486 .mwdma_mask = 0x07, /* mwdma0-2 */
487 .udma_mask = 0x7f, /* udma0-6 */
488 .port_ops = &piix_sata_ops,
494 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR,
495 .pio_mask = 0x1f, /* pio0-4 */
496 .mwdma_mask = 0x07, /* mwdma0-2 */
497 .udma_mask = 0x7f, /* udma0-6 */
498 .port_ops = &piix_sata_ops,
501 /* ich6_sata_ahci: 7 */
504 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
506 .pio_mask = 0x1f, /* pio0-4 */
507 .mwdma_mask = 0x07, /* mwdma0-2 */
508 .udma_mask = 0x7f, /* udma0-6 */
509 .port_ops = &piix_sata_ops,
512 /* ich6m_sata_ahci: 8 */
515 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
517 .pio_mask = 0x1f, /* pio0-4 */
518 .mwdma_mask = 0x07, /* mwdma0-2 */
519 .udma_mask = 0x7f, /* udma0-6 */
520 .port_ops = &piix_sata_ops,
523 /* ich8_sata_ahci: 9 */
526 .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
528 .pio_mask = 0x1f, /* pio0-4 */
529 .mwdma_mask = 0x07, /* mwdma0-2 */
530 .udma_mask = 0x7f, /* udma0-6 */
531 .port_ops = &piix_sata_ops,
536 static struct pci_bits piix_enable_bits[] = {
537 { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
538 { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
541 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
542 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
543 MODULE_LICENSE("GPL");
544 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
545 MODULE_VERSION(DRV_VERSION);
554 * List of laptops that use short cables rather than 80 wire
557 static const struct ich_laptop ich_laptop[] = {
558 /* devid, subvendor, subdev */
559 { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
565 * piix_pata_cbl_detect - Probe host controller cable detect info
566 * @ap: Port for which cable detect info is desired
568 * Read 80c cable indicator from ATA PCI device's PCI config
569 * register. This register is normally set by firmware (BIOS).
572 * None (inherited from caller).
575 static void ich_pata_cbl_detect(struct ata_port *ap)
577 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
578 const struct ich_laptop *lap = &ich_laptop[0];
581 /* no 80c support in host controller? */
582 if ((ap->udma_mask & ~ATA_UDMA_MASK_40C) == 0)
585 /* Check for specials - Acer Aspire 5602WLMi */
586 while (lap->device) {
587 if (lap->device == pdev->device &&
588 lap->subvendor == pdev->subsystem_vendor &&
589 lap->subdevice == pdev->subsystem_device) {
590 ap->cbl = ATA_CBL_PATA40_SHORT;
596 /* check BIOS cable detect results */
597 mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
598 pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
599 if ((tmp & mask) == 0)
602 ap->cbl = ATA_CBL_PATA80;
606 ap->cbl = ATA_CBL_PATA40;
610 * piix_pata_prereset - prereset for PATA host controller
615 * None (inherited from caller).
617 static int piix_pata_prereset(struct ata_port *ap)
619 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
621 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
624 ap->cbl = ATA_CBL_PATA40;
625 return ata_std_prereset(ap);
628 static void piix_pata_error_handler(struct ata_port *ap)
630 ata_bmdma_drive_eh(ap, piix_pata_prereset, ata_std_softreset, NULL,
636 * ich_pata_prereset - prereset for PATA host controller
641 * None (inherited from caller).
643 static int ich_pata_prereset(struct ata_port *ap)
645 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
647 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no])) {
648 ata_port_printk(ap, KERN_INFO, "port disabled. ignoring.\n");
649 ap->eh_context.i.action &= ~ATA_EH_RESET_MASK;
653 ich_pata_cbl_detect(ap);
655 return ata_std_prereset(ap);
658 static void ich_pata_error_handler(struct ata_port *ap)
660 ata_bmdma_drive_eh(ap, ich_pata_prereset, ata_std_softreset, NULL,
664 static void piix_sata_error_handler(struct ata_port *ap)
666 ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
671 * piix_set_piomode - Initialize host controller PATA PIO timings
672 * @ap: Port whose timings we are configuring
675 * Set PIO mode for device, in host controller PCI config space.
678 * None (inherited from caller).
681 static void piix_set_piomode (struct ata_port *ap, struct ata_device *adev)
683 unsigned int pio = adev->pio_mode - XFER_PIO_0;
684 struct pci_dev *dev = to_pci_dev(ap->host->dev);
685 unsigned int is_slave = (adev->devno != 0);
686 unsigned int master_port= ap->port_no ? 0x42 : 0x40;
687 unsigned int slave_port = 0x44;
694 * See Intel Document 298600-004 for the timing programing rules
695 * for ICH controllers.
698 static const /* ISP RTC */
699 u8 timings[][2] = { { 0, 0 },
706 control |= 1; /* TIME1 enable */
707 if (ata_pio_need_iordy(adev))
708 control |= 2; /* IE enable */
710 /* Intel specifies that the PPE functionality is for disk only */
711 if (adev->class == ATA_DEV_ATA)
712 control |= 4; /* PPE enable */
714 pci_read_config_word(dev, master_port, &master_data);
716 /* Enable SITRE (seperate slave timing register) */
717 master_data |= 0x4000;
718 /* enable PPE1, IE1 and TIME1 as needed */
719 master_data |= (control << 4);
720 pci_read_config_byte(dev, slave_port, &slave_data);
721 slave_data &= (ap->port_no ? 0x0f : 0xf0);
722 /* Load the timing nibble for this slave */
723 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
725 /* Master keeps the bits in a different format */
726 master_data &= 0xccf8;
727 /* Enable PPE, IE and TIME as appropriate */
728 master_data |= control;
730 (timings[pio][0] << 12) |
731 (timings[pio][1] << 8);
733 pci_write_config_word(dev, master_port, master_data);
735 pci_write_config_byte(dev, slave_port, slave_data);
737 /* Ensure the UDMA bit is off - it will be turned back on if
741 pci_read_config_byte(dev, 0x48, &udma_enable);
742 udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
743 pci_write_config_byte(dev, 0x48, udma_enable);
748 * do_pata_set_dmamode - Initialize host controller PATA PIO timings
749 * @ap: Port whose timings we are configuring
750 * @adev: Drive in question
751 * @udma: udma mode, 0 - 6
752 * @isich: set if the chip is an ICH device
754 * Set UDMA mode for device, in host controller PCI config space.
757 * None (inherited from caller).
760 static void do_pata_set_dmamode (struct ata_port *ap, struct ata_device *adev, int isich)
762 struct pci_dev *dev = to_pci_dev(ap->host->dev);
763 u8 master_port = ap->port_no ? 0x42 : 0x40;
765 u8 speed = adev->dma_mode;
766 int devid = adev->devno + 2 * ap->port_no;
769 static const /* ISP RTC */
770 u8 timings[][2] = { { 0, 0 },
776 pci_read_config_word(dev, master_port, &master_data);
777 pci_read_config_byte(dev, 0x48, &udma_enable);
779 if (speed >= XFER_UDMA_0) {
780 unsigned int udma = adev->dma_mode - XFER_UDMA_0;
783 int u_clock, u_speed;
786 * UDMA is handled by a combination of clock switching and
787 * selection of dividers
789 * Handy rule: Odd modes are UDMATIMx 01, even are 02
790 * except UDMA0 which is 00
792 u_speed = min(2 - (udma & 1), udma);
794 u_clock = 0x1000; /* 100Mhz */
796 u_clock = 1; /* 66Mhz */
798 u_clock = 0; /* 33Mhz */
800 udma_enable |= (1 << devid);
802 /* Load the CT/RP selection */
803 pci_read_config_word(dev, 0x4A, &udma_timing);
804 udma_timing &= ~(3 << (4 * devid));
805 udma_timing |= u_speed << (4 * devid);
806 pci_write_config_word(dev, 0x4A, udma_timing);
809 /* Select a 33/66/100Mhz clock */
810 pci_read_config_word(dev, 0x54, &ideconf);
811 ideconf &= ~(0x1001 << devid);
812 ideconf |= u_clock << devid;
813 /* For ICH or later we should set bit 10 for better
814 performance (WR_PingPong_En) */
815 pci_write_config_word(dev, 0x54, ideconf);
819 * MWDMA is driven by the PIO timings. We must also enable
820 * IORDY unconditionally along with TIME1. PPE has already
821 * been set when the PIO timing was set.
823 unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
824 unsigned int control;
826 const unsigned int needed_pio[3] = {
827 XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
829 int pio = needed_pio[mwdma] - XFER_PIO_0;
831 control = 3; /* IORDY|TIME1 */
833 /* If the drive MWDMA is faster than it can do PIO then
834 we must force PIO into PIO0 */
836 if (adev->pio_mode < needed_pio[mwdma])
837 /* Enable DMA timing only */
838 control |= 8; /* PIO cycles in PIO0 */
840 if (adev->devno) { /* Slave */
841 master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
842 master_data |= control << 4;
843 pci_read_config_byte(dev, 0x44, &slave_data);
844 slave_data &= (0x0F + 0xE1 * ap->port_no);
845 /* Load the matching timing */
846 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
847 pci_write_config_byte(dev, 0x44, slave_data);
848 } else { /* Master */
849 master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
850 and master timing bits */
851 master_data |= control;
853 (timings[pio][0] << 12) |
854 (timings[pio][1] << 8);
856 udma_enable &= ~(1 << devid);
857 pci_write_config_word(dev, master_port, master_data);
859 /* Don't scribble on 0x48 if the controller does not support UDMA */
861 pci_write_config_byte(dev, 0x48, udma_enable);
865 * piix_set_dmamode - Initialize host controller PATA DMA timings
866 * @ap: Port whose timings we are configuring
869 * Set MW/UDMA mode for device, in host controller PCI config space.
872 * None (inherited from caller).
875 static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev)
877 do_pata_set_dmamode(ap, adev, 0);
881 * ich_set_dmamode - Initialize host controller PATA DMA timings
882 * @ap: Port whose timings we are configuring
885 * Set MW/UDMA mode for device, in host controller PCI config space.
888 * None (inherited from caller).
891 static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
893 do_pata_set_dmamode(ap, adev, 1);
896 #define AHCI_PCI_BAR 5
897 #define AHCI_GLOBAL_CTL 0x04
898 #define AHCI_ENABLE (1 << 31)
899 static int piix_disable_ahci(struct pci_dev *pdev)
905 /* BUG: pci_enable_device has not yet been called. This
906 * works because this device is usually set up by BIOS.
909 if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
910 !pci_resource_len(pdev, AHCI_PCI_BAR))
913 mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
917 tmp = readl(mmio + AHCI_GLOBAL_CTL);
918 if (tmp & AHCI_ENABLE) {
920 writel(tmp, mmio + AHCI_GLOBAL_CTL);
922 tmp = readl(mmio + AHCI_GLOBAL_CTL);
923 if (tmp & AHCI_ENABLE)
927 pci_iounmap(pdev, mmio);
932 * piix_check_450nx_errata - Check for problem 450NX setup
933 * @ata_dev: the PCI device to check
935 * Check for the present of 450NX errata #19 and errata #25. If
936 * they are found return an error code so we can turn off DMA
939 static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
941 struct pci_dev *pdev = NULL;
946 while((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL)
948 /* Look for 450NX PXB. Check for problem configurations
949 A PCI quirk checks bit 6 already */
950 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
951 pci_read_config_word(pdev, 0x41, &cfg);
952 /* Only on the original revision: IDE DMA can hang */
955 /* On all revisions below 5 PXB bus lock must be disabled for IDE */
956 else if (cfg & (1<<14) && rev < 5)
960 dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
961 if (no_piix_dma == 2)
962 dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
966 static void __devinit piix_init_pcs(struct pci_dev *pdev,
967 struct ata_port_info *pinfo,
968 const struct piix_map_db *map_db)
972 pci_read_config_word(pdev, ICH5_PCS, &pcs);
974 new_pcs = pcs | map_db->port_enable;
976 if (new_pcs != pcs) {
977 DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
978 pci_write_config_word(pdev, ICH5_PCS, new_pcs);
983 static void __devinit piix_init_sata_map(struct pci_dev *pdev,
984 struct ata_port_info *pinfo,
985 const struct piix_map_db *map_db)
987 struct piix_host_priv *hpriv = pinfo[0].private_data;
988 const unsigned int *map;
989 int i, invalid_map = 0;
992 pci_read_config_byte(pdev, ICH5_PMR, &map_value);
994 map = map_db->map[map_value & map_db->mask];
996 dev_printk(KERN_INFO, &pdev->dev, "MAP [");
997 for (i = 0; i < 4; i++) {
1009 WARN_ON((i & 1) || map[i + 1] != IDE);
1010 pinfo[i / 2] = piix_port_info[ich_pata_100];
1011 pinfo[i / 2].private_data = hpriv;
1017 printk(" P%d", map[i]);
1019 pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
1026 dev_printk(KERN_ERR, &pdev->dev,
1027 "invalid MAP value %u\n", map_value);
1033 * piix_init_one - Register PIIX ATA PCI device with kernel services
1034 * @pdev: PCI device to register
1035 * @ent: Entry in piix_pci_tbl matching with @pdev
1037 * Called from kernel PCI layer. We probe for combined mode (sigh),
1038 * and then hand over control to libata, for it to do the rest.
1041 * Inherited from PCI layer (may sleep).
1044 * Zero on success, or -ERRNO value.
1047 static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1049 static int printed_version;
1050 struct ata_port_info port_info[2];
1051 struct ata_port_info *ppinfo[2] = { &port_info[0], &port_info[1] };
1052 struct piix_host_priv *hpriv;
1053 unsigned long port_flags;
1055 if (!printed_version++)
1056 dev_printk(KERN_DEBUG, &pdev->dev,
1057 "version " DRV_VERSION "\n");
1059 /* no hotplugging support (FIXME) */
1060 if (!in_module_init)
1063 hpriv = kzalloc(sizeof(*hpriv), GFP_KERNEL);
1067 port_info[0] = piix_port_info[ent->driver_data];
1068 port_info[1] = piix_port_info[ent->driver_data];
1069 port_info[0].private_data = hpriv;
1070 port_info[1].private_data = hpriv;
1072 port_flags = port_info[0].flags;
1074 if (port_flags & PIIX_FLAG_AHCI) {
1076 pci_read_config_byte(pdev, PIIX_SCC, &tmp);
1077 if (tmp == PIIX_AHCI_DEVICE) {
1078 int rc = piix_disable_ahci(pdev);
1084 /* Initialize SATA map */
1085 if (port_flags & ATA_FLAG_SATA) {
1086 piix_init_sata_map(pdev, port_info,
1087 piix_map_db_table[ent->driver_data]);
1088 piix_init_pcs(pdev, port_info,
1089 piix_map_db_table[ent->driver_data]);
1092 /* On ICH5, some BIOSen disable the interrupt using the
1093 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
1094 * On ICH6, this bit has the same effect, but only when
1095 * MSI is disabled (and it is disabled, as we don't use
1096 * message-signalled interrupts currently).
1098 if (port_flags & PIIX_FLAG_CHECKINTR)
1101 if (piix_check_450nx_errata(pdev)) {
1102 /* This writes into the master table but it does not
1103 really matter for this errata as we will apply it to
1104 all the PIIX devices on the board */
1105 port_info[0].mwdma_mask = 0;
1106 port_info[0].udma_mask = 0;
1107 port_info[1].mwdma_mask = 0;
1108 port_info[1].udma_mask = 0;
1110 return ata_pci_init_one(pdev, ppinfo, 2);
1113 static void piix_host_stop(struct ata_host *host)
1115 struct piix_host_priv *hpriv = host->private_data;
1117 ata_host_stop(host);
1122 static int __init piix_init(void)
1126 DPRINTK("pci_register_driver\n");
1127 rc = pci_register_driver(&piix_pci_driver);
1137 static void __exit piix_exit(void)
1139 pci_unregister_driver(&piix_pci_driver);
1142 module_init(piix_init);
1143 module_exit(piix_exit);