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[deliverable/linux.git] / drivers / ata / pata_ali.c
1 /*
2 * pata_ali.c - ALI 15x3 PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * based in part upon
7 * linux/drivers/ide/pci/alim15x3.c Version 0.17 2003/01/02
8 *
9 * Copyright (C) 1998-2000 Michel Aubry, Maintainer
10 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
11 * Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
12 *
13 * Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
14 * May be copied or modified under the terms of the GNU General Public License
15 * Copyright (C) 2002 Alan Cox <alan@redhat.com>
16 * ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
17 *
18 * Documentation
19 * Chipset documentation available under NDA only
20 *
21 * TODO/CHECK
22 * Cannot have ATAPI on both master & slave for rev < c2 (???) but
23 * otherwise should do atapi DMA.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/pci.h>
29 #include <linux/init.h>
30 #include <linux/blkdev.h>
31 #include <linux/delay.h>
32 #include <scsi/scsi_host.h>
33 #include <linux/libata.h>
34 #include <linux/dmi.h>
35
36 #define DRV_NAME "pata_ali"
37 #define DRV_VERSION "0.7.5"
38
39 static int ali_atapi_dma = 0;
40 module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
41 MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
42
43 /*
44 * Cable special cases
45 */
46
47 static const struct dmi_system_id cable_dmi_table[] = {
48 {
49 .ident = "HP Pavilion N5430",
50 .matches = {
51 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
52 DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
53 },
54 },
55 {
56 .ident = "Toshiba Satelite S1800-814",
57 .matches = {
58 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
59 DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
60 },
61 },
62 { }
63 };
64
65 static int ali_cable_override(struct pci_dev *pdev)
66 {
67 /* Fujitsu P2000 */
68 if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
69 return 1;
70 /* Mitac 8317 (Winbook-A) and relatives */
71 if (pdev->subsystem_vendor == 0x1071 && pdev->subsystem_device == 0x8317)
72 return 1;
73 /* Systems by DMI */
74 if (dmi_check_system(cable_dmi_table))
75 return 1;
76 return 0;
77 }
78
79 /**
80 * ali_c2_cable_detect - cable detection
81 * @ap: ATA port
82 *
83 * Perform cable detection for C2 and later revisions
84 */
85
86 static int ali_c2_cable_detect(struct ata_port *ap)
87 {
88 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
89 u8 ata66;
90
91 /* Certain laptops use short but suitable cables and don't
92 implement the detect logic */
93
94 if (ali_cable_override(pdev))
95 return ATA_CBL_PATA40_SHORT;
96
97 /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
98 Bit set for 40 pin */
99 pci_read_config_byte(pdev, 0x4A, &ata66);
100 if (ata66 & (1 << ap->port_no))
101 return ATA_CBL_PATA40;
102 else
103 return ATA_CBL_PATA80;
104 }
105
106 /**
107 * ali_20_filter - filter for earlier ALI DMA
108 * @ap: ALi ATA port
109 * @adev: attached device
110 *
111 * Ensure that we do not do DMA on CD devices. We may be able to
112 * fix that later on. Also ensure we do not do UDMA on WDC drives
113 */
114
115 static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
116 {
117 char model_num[ATA_ID_PROD_LEN + 1];
118 /* No DMA on anything but a disk for now */
119 if (adev->class != ATA_DEV_ATA)
120 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
121 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
122 if (strstr(model_num, "WDC"))
123 return mask &= ~ATA_MASK_UDMA;
124 return ata_pci_default_filter(adev, mask);
125 }
126
127 /**
128 * ali_fifo_control - FIFO manager
129 * @ap: ALi channel to control
130 * @adev: device for FIFO control
131 * @on: 0 for off 1 for on
132 *
133 * Enable or disable the FIFO on a given device. Because of the way the
134 * ALi FIFO works it provides a boost on ATA disk but can be confused by
135 * ATAPI and we must therefore manage it.
136 */
137
138 static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
139 {
140 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
141 int pio_fifo = 0x54 + ap->port_no;
142 u8 fifo;
143 int shift = 4 * adev->devno;
144
145 /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
146 0x00. Not all the docs agree but the behaviour we now use is the
147 one stated in the BIOS Programming Guide */
148
149 pci_read_config_byte(pdev, pio_fifo, &fifo);
150 fifo &= ~(0x0F << shift);
151 if (on)
152 fifo |= (on << shift);
153 pci_write_config_byte(pdev, pio_fifo, fifo);
154 }
155
156 /**
157 * ali_program_modes - load mode registers
158 * @ap: ALi channel to load
159 * @adev: Device the timing is for
160 * @cmd: Command timing
161 * @data: Data timing
162 * @ultra: UDMA timing or zero for off
163 *
164 * Loads the timing registers for cmd/data and disable UDMA if
165 * ultra is zero. If ultra is set then load and enable the UDMA
166 * timing but do not touch the command/data timing.
167 */
168
169 static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
170 {
171 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
172 int cas = 0x58 + 4 * ap->port_no; /* Command timing */
173 int cbt = 0x59 + 4 * ap->port_no; /* Command timing */
174 int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
175 int udmat = 0x56 + ap->port_no; /* UDMA timing */
176 int shift = 4 * adev->devno;
177 u8 udma;
178
179 if (t != NULL) {
180 t->setup = FIT(t->setup, 1, 8) & 7;
181 t->act8b = FIT(t->act8b, 1, 8) & 7;
182 t->rec8b = FIT(t->rec8b, 1, 16) & 15;
183 t->active = FIT(t->active, 1, 8) & 7;
184 t->recover = FIT(t->recover, 1, 16) & 15;
185
186 pci_write_config_byte(pdev, cas, t->setup);
187 pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
188 pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
189 }
190
191 /* Set up the UDMA enable */
192 pci_read_config_byte(pdev, udmat, &udma);
193 udma &= ~(0x0F << shift);
194 udma |= ultra << shift;
195 pci_write_config_byte(pdev, udmat, udma);
196 }
197
198 /**
199 * ali_set_piomode - set initial PIO mode data
200 * @ap: ATA interface
201 * @adev: ATA device
202 *
203 * Program the ALi registers for PIO mode. FIXME: add timings for
204 * PIO5.
205 */
206
207 static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
208 {
209 struct ata_device *pair = ata_dev_pair(adev);
210 struct ata_timing t;
211 unsigned long T = 1000000000 / 33333; /* PCI clock based */
212
213 ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
214 if (pair) {
215 struct ata_timing p;
216 ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
217 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
218 if (pair->dma_mode) {
219 ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
220 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
221 }
222 }
223
224 /* PIO FIFO is only permitted on ATA disk */
225 if (adev->class != ATA_DEV_ATA)
226 ali_fifo_control(ap, adev, 0x00);
227 ali_program_modes(ap, adev, &t, 0);
228 if (adev->class == ATA_DEV_ATA)
229 ali_fifo_control(ap, adev, 0x05);
230
231 }
232
233 /**
234 * ali_set_dmamode - set initial DMA mode data
235 * @ap: ATA interface
236 * @adev: ATA device
237 *
238 * FIXME: MWDMA timings
239 */
240
241 static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
242 {
243 static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
244 struct ata_device *pair = ata_dev_pair(adev);
245 struct ata_timing t;
246 unsigned long T = 1000000000 / 33333; /* PCI clock based */
247 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
248
249
250 if (adev->class == ATA_DEV_ATA)
251 ali_fifo_control(ap, adev, 0x08);
252
253 if (adev->dma_mode >= XFER_UDMA_0) {
254 ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
255 if (adev->dma_mode >= XFER_UDMA_3) {
256 u8 reg4b;
257 pci_read_config_byte(pdev, 0x4B, &reg4b);
258 reg4b |= 1;
259 pci_write_config_byte(pdev, 0x4B, reg4b);
260 }
261 } else {
262 ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
263 if (pair) {
264 struct ata_timing p;
265 ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
266 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
267 if (pair->dma_mode) {
268 ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
269 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
270 }
271 }
272 ali_program_modes(ap, adev, &t, 0);
273 }
274 }
275
276 /**
277 * ali_warn_atapi_dma - Warn about ATAPI DMA disablement
278 * @adev: Device
279 *
280 * Whine about ATAPI DMA disablement if @adev is an ATAPI device.
281 * Can be used as ->dev_config.
282 */
283
284 static void ali_warn_atapi_dma(struct ata_device *adev)
285 {
286 struct ata_eh_context *ehc = &adev->link->eh_context;
287 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
288
289 if (print_info && adev->class == ATA_DEV_ATAPI && !ali_atapi_dma) {
290 ata_dev_printk(adev, KERN_WARNING,
291 "WARNING: ATAPI DMA disabled for reliablity issues. It can be enabled\n");
292 ata_dev_printk(adev, KERN_WARNING,
293 "WARNING: via pata_ali.atapi_dma modparam or corresponding sysfs node.\n");
294 }
295 }
296
297 /**
298 * ali_lock_sectors - Keep older devices to 255 sector mode
299 * @adev: Device
300 *
301 * Called during the bus probe for each device that is found. We use
302 * this call to lock the sector count of the device to 255 or less on
303 * older ALi controllers. If we didn't do this then large I/O's would
304 * require LBA48 commands which the older ALi requires are issued by
305 * slower PIO methods
306 */
307
308 static void ali_lock_sectors(struct ata_device *adev)
309 {
310 adev->max_sectors = 255;
311 ali_warn_atapi_dma(adev);
312 }
313
314 /**
315 * ali_check_atapi_dma - DMA check for most ALi controllers
316 * @adev: Device
317 *
318 * Called to decide whether commands should be sent by DMA or PIO
319 */
320
321 static int ali_check_atapi_dma(struct ata_queued_cmd *qc)
322 {
323 if (!ali_atapi_dma) {
324 /* FIXME: pata_ali can't do ATAPI DMA reliably but the
325 * IDE alim15x3 driver can. I tried lots of things
326 * but couldn't find what the actual difference was.
327 * If you got an idea, please write it to
328 * linux-ide@vger.kernel.org and cc htejun@gmail.com.
329 *
330 * Disable ATAPI DMA for now.
331 */
332 return -EOPNOTSUPP;
333 }
334
335 /* If its not a media command, its not worth it */
336 if (atapi_cmd_type(qc->cdb[0]) == ATAPI_MISC)
337 return -EOPNOTSUPP;
338 return 0;
339 }
340
341 static struct scsi_host_template ali_sht = {
342 .module = THIS_MODULE,
343 .name = DRV_NAME,
344 .ioctl = ata_scsi_ioctl,
345 .queuecommand = ata_scsi_queuecmd,
346 .can_queue = ATA_DEF_QUEUE,
347 .this_id = ATA_SHT_THIS_ID,
348 .sg_tablesize = LIBATA_MAX_PRD,
349 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
350 .emulated = ATA_SHT_EMULATED,
351 .use_clustering = ATA_SHT_USE_CLUSTERING,
352 .proc_name = DRV_NAME,
353 .dma_boundary = ATA_DMA_BOUNDARY,
354 .slave_configure = ata_scsi_slave_config,
355 .slave_destroy = ata_scsi_slave_destroy,
356 .bios_param = ata_std_bios_param,
357 };
358
359 /*
360 * Port operations for PIO only ALi
361 */
362
363 static struct ata_port_operations ali_early_port_ops = {
364 .set_piomode = ali_set_piomode,
365 .tf_load = ata_tf_load,
366 .tf_read = ata_tf_read,
367 .check_status = ata_check_status,
368 .exec_command = ata_exec_command,
369 .dev_select = ata_std_dev_select,
370
371 .freeze = ata_bmdma_freeze,
372 .thaw = ata_bmdma_thaw,
373 .error_handler = ata_bmdma_error_handler,
374 .post_internal_cmd = ata_bmdma_post_internal_cmd,
375 .cable_detect = ata_cable_40wire,
376
377 .qc_prep = ata_qc_prep,
378 .qc_issue = ata_qc_issue_prot,
379
380 .data_xfer = ata_data_xfer,
381
382 .irq_handler = ata_interrupt,
383 .irq_clear = ata_bmdma_irq_clear,
384 .irq_on = ata_irq_on,
385
386 .port_start = ata_sff_port_start,
387 };
388
389 /*
390 * Port operations for DMA capable ALi without cable
391 * detect
392 */
393 static struct ata_port_operations ali_20_port_ops = {
394 .set_piomode = ali_set_piomode,
395 .set_dmamode = ali_set_dmamode,
396 .mode_filter = ali_20_filter,
397
398 .tf_load = ata_tf_load,
399 .tf_read = ata_tf_read,
400 .check_atapi_dma = ali_check_atapi_dma,
401 .check_status = ata_check_status,
402 .exec_command = ata_exec_command,
403 .dev_select = ata_std_dev_select,
404 .dev_config = ali_lock_sectors,
405
406 .freeze = ata_bmdma_freeze,
407 .thaw = ata_bmdma_thaw,
408 .error_handler = ata_bmdma_error_handler,
409 .post_internal_cmd = ata_bmdma_post_internal_cmd,
410 .cable_detect = ata_cable_40wire,
411
412 .bmdma_setup = ata_bmdma_setup,
413 .bmdma_start = ata_bmdma_start,
414 .bmdma_stop = ata_bmdma_stop,
415 .bmdma_status = ata_bmdma_status,
416
417 .qc_prep = ata_qc_prep,
418 .qc_issue = ata_qc_issue_prot,
419
420 .data_xfer = ata_data_xfer,
421
422 .irq_handler = ata_interrupt,
423 .irq_clear = ata_bmdma_irq_clear,
424 .irq_on = ata_irq_on,
425
426 .port_start = ata_sff_port_start,
427 };
428
429 /*
430 * Port operations for DMA capable ALi with cable detect
431 */
432 static struct ata_port_operations ali_c2_port_ops = {
433 .set_piomode = ali_set_piomode,
434 .set_dmamode = ali_set_dmamode,
435 .mode_filter = ata_pci_default_filter,
436 .tf_load = ata_tf_load,
437 .tf_read = ata_tf_read,
438 .check_atapi_dma = ali_check_atapi_dma,
439 .check_status = ata_check_status,
440 .exec_command = ata_exec_command,
441 .dev_select = ata_std_dev_select,
442 .dev_config = ali_lock_sectors,
443
444 .freeze = ata_bmdma_freeze,
445 .thaw = ata_bmdma_thaw,
446 .error_handler = ata_bmdma_error_handler,
447 .post_internal_cmd = ata_bmdma_post_internal_cmd,
448 .cable_detect = ali_c2_cable_detect,
449
450 .bmdma_setup = ata_bmdma_setup,
451 .bmdma_start = ata_bmdma_start,
452 .bmdma_stop = ata_bmdma_stop,
453 .bmdma_status = ata_bmdma_status,
454
455 .qc_prep = ata_qc_prep,
456 .qc_issue = ata_qc_issue_prot,
457
458 .data_xfer = ata_data_xfer,
459
460 .irq_handler = ata_interrupt,
461 .irq_clear = ata_bmdma_irq_clear,
462 .irq_on = ata_irq_on,
463
464 .port_start = ata_sff_port_start,
465 };
466
467 /*
468 * Port operations for DMA capable ALi with cable detect and LBA48
469 */
470 static struct ata_port_operations ali_c5_port_ops = {
471 .set_piomode = ali_set_piomode,
472 .set_dmamode = ali_set_dmamode,
473 .mode_filter = ata_pci_default_filter,
474 .tf_load = ata_tf_load,
475 .tf_read = ata_tf_read,
476 .check_atapi_dma = ali_check_atapi_dma,
477 .check_status = ata_check_status,
478 .exec_command = ata_exec_command,
479 .dev_select = ata_std_dev_select,
480 .dev_config = ali_warn_atapi_dma,
481
482 .freeze = ata_bmdma_freeze,
483 .thaw = ata_bmdma_thaw,
484 .error_handler = ata_bmdma_error_handler,
485 .post_internal_cmd = ata_bmdma_post_internal_cmd,
486 .cable_detect = ali_c2_cable_detect,
487
488 .bmdma_setup = ata_bmdma_setup,
489 .bmdma_start = ata_bmdma_start,
490 .bmdma_stop = ata_bmdma_stop,
491 .bmdma_status = ata_bmdma_status,
492
493 .qc_prep = ata_qc_prep,
494 .qc_issue = ata_qc_issue_prot,
495
496 .data_xfer = ata_data_xfer,
497
498 .irq_handler = ata_interrupt,
499 .irq_clear = ata_bmdma_irq_clear,
500 .irq_on = ata_irq_on,
501
502 .port_start = ata_sff_port_start,
503 };
504
505
506 /**
507 * ali_init_chipset - chip setup function
508 * @pdev: PCI device of ATA controller
509 *
510 * Perform the setup on the device that must be done both at boot
511 * and at resume time.
512 */
513
514 static void ali_init_chipset(struct pci_dev *pdev)
515 {
516 u8 tmp;
517 struct pci_dev *north, *isa_bridge;
518
519 /*
520 * The chipset revision selects the driver operations and
521 * mode data.
522 */
523
524 if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
525 /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
526 pci_read_config_byte(pdev, 0x4B, &tmp);
527 /* Clear CD-ROM DMA write bit */
528 tmp &= 0x7F;
529 pci_write_config_byte(pdev, 0x4B, tmp);
530 } else if (pdev->revision >= 0xC2) {
531 /* Enable cable detection logic */
532 pci_read_config_byte(pdev, 0x4B, &tmp);
533 pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
534 }
535 north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
536 isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
537
538 if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
539 /* Configure the ALi bridge logic. For non ALi rely on BIOS.
540 Set the south bridge enable bit */
541 pci_read_config_byte(isa_bridge, 0x79, &tmp);
542 if (pdev->revision == 0xC2)
543 pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
544 else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
545 pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
546 }
547 if (pdev->revision >= 0x20) {
548 /*
549 * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
550 * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
551 * via 0x54/55.
552 */
553 pci_read_config_byte(pdev, 0x53, &tmp);
554 if (pdev->revision <= 0x20)
555 tmp &= ~0x02;
556 if (pdev->revision >= 0xc7)
557 tmp |= 0x03;
558 else
559 tmp |= 0x01; /* CD_ROM enable for DMA */
560 pci_write_config_byte(pdev, 0x53, tmp);
561 }
562 pci_dev_put(isa_bridge);
563 pci_dev_put(north);
564 ata_pci_clear_simplex(pdev);
565 }
566 /**
567 * ali_init_one - discovery callback
568 * @pdev: PCI device ID
569 * @id: PCI table info
570 *
571 * An ALi IDE interface has been discovered. Figure out what revision
572 * and perform configuration work before handing it to the ATA layer
573 */
574
575 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
576 {
577 static const struct ata_port_info info_early = {
578 .sht = &ali_sht,
579 .flags = ATA_FLAG_SLAVE_POSS,
580 .pio_mask = 0x1f,
581 .port_ops = &ali_early_port_ops
582 };
583 /* Revision 0x20 added DMA */
584 static const struct ata_port_info info_20 = {
585 .sht = &ali_sht,
586 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
587 .pio_mask = 0x1f,
588 .mwdma_mask = 0x07,
589 .port_ops = &ali_20_port_ops
590 };
591 /* Revision 0x20 with support logic added UDMA */
592 static const struct ata_port_info info_20_udma = {
593 .sht = &ali_sht,
594 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
595 .pio_mask = 0x1f,
596 .mwdma_mask = 0x07,
597 .udma_mask = 0x07, /* UDMA33 */
598 .port_ops = &ali_20_port_ops
599 };
600 /* Revision 0xC2 adds UDMA66 */
601 static const struct ata_port_info info_c2 = {
602 .sht = &ali_sht,
603 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
604 .pio_mask = 0x1f,
605 .mwdma_mask = 0x07,
606 .udma_mask = ATA_UDMA4,
607 .port_ops = &ali_c2_port_ops
608 };
609 /* Revision 0xC3 is UDMA66 for now */
610 static const struct ata_port_info info_c3 = {
611 .sht = &ali_sht,
612 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
613 .pio_mask = 0x1f,
614 .mwdma_mask = 0x07,
615 .udma_mask = ATA_UDMA4,
616 .port_ops = &ali_c2_port_ops
617 };
618 /* Revision 0xC4 is UDMA100 */
619 static const struct ata_port_info info_c4 = {
620 .sht = &ali_sht,
621 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
622 .pio_mask = 0x1f,
623 .mwdma_mask = 0x07,
624 .udma_mask = ATA_UDMA5,
625 .port_ops = &ali_c2_port_ops
626 };
627 /* Revision 0xC5 is UDMA133 with LBA48 DMA */
628 static const struct ata_port_info info_c5 = {
629 .sht = &ali_sht,
630 .flags = ATA_FLAG_SLAVE_POSS,
631 .pio_mask = 0x1f,
632 .mwdma_mask = 0x07,
633 .udma_mask = ATA_UDMA6,
634 .port_ops = &ali_c5_port_ops
635 };
636
637 const struct ata_port_info *ppi[] = { NULL, NULL };
638 u8 tmp;
639 struct pci_dev *isa_bridge;
640
641 /*
642 * The chipset revision selects the driver operations and
643 * mode data.
644 */
645
646 if (pdev->revision < 0x20) {
647 ppi[0] = &info_early;
648 } else if (pdev->revision < 0xC2) {
649 ppi[0] = &info_20;
650 } else if (pdev->revision == 0xC2) {
651 ppi[0] = &info_c2;
652 } else if (pdev->revision == 0xC3) {
653 ppi[0] = &info_c3;
654 } else if (pdev->revision == 0xC4) {
655 ppi[0] = &info_c4;
656 } else
657 ppi[0] = &info_c5;
658
659 ali_init_chipset(pdev);
660
661 isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
662 if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
663 /* Are we paired with a UDMA capable chip */
664 pci_read_config_byte(isa_bridge, 0x5E, &tmp);
665 if ((tmp & 0x1E) == 0x12)
666 ppi[0] = &info_20_udma;
667 pci_dev_put(isa_bridge);
668 }
669 return ata_pci_init_one(pdev, ppi);
670 }
671
672 #ifdef CONFIG_PM
673 static int ali_reinit_one(struct pci_dev *pdev)
674 {
675 ali_init_chipset(pdev);
676 return ata_pci_device_resume(pdev);
677 }
678 #endif
679
680 static const struct pci_device_id ali[] = {
681 { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
682 { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
683
684 { },
685 };
686
687 static struct pci_driver ali_pci_driver = {
688 .name = DRV_NAME,
689 .id_table = ali,
690 .probe = ali_init_one,
691 .remove = ata_pci_remove_one,
692 #ifdef CONFIG_PM
693 .suspend = ata_pci_device_suspend,
694 .resume = ali_reinit_one,
695 #endif
696 };
697
698 static int __init ali_init(void)
699 {
700 return pci_register_driver(&ali_pci_driver);
701 }
702
703
704 static void __exit ali_exit(void)
705 {
706 pci_unregister_driver(&ali_pci_driver);
707 }
708
709
710 MODULE_AUTHOR("Alan Cox");
711 MODULE_DESCRIPTION("low-level driver for ALi PATA");
712 MODULE_LICENSE("GPL");
713 MODULE_DEVICE_TABLE(pci, ali);
714 MODULE_VERSION(DRV_VERSION);
715
716 module_init(ali_init);
717 module_exit(ali_exit);
Linux kernel - Deliverables
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