Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/drivers/ata/pata_ali.c

  1 /*
  2  * pata_ali.c   - ALI 15x3 PATA for new ATA layer
  3  *                        (C) 2005 Red Hat Inc
  4  *
  5  * based in part upon
  6  * linux/drivers/ide/pci/alim15x3.c             Version 0.17    2003/01/02
  7  *
  8  *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
  9  *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
 10  *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
 11  *
 12  *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
 13  *  May be copied or modified under the terms of the GNU General Public License
 14  *  Copyright (C) 2002 Alan Cox <alan@redhat.com>
 15  *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
 16  *
 17  *  Documentation
 18  *      Chipset documentation available under NDA only
 19  *
 20  *  TODO/CHECK
 21  *      Cannot have ATAPI on both master & slave for rev < c2 (???) but
 22  *      otherwise should do atapi DMA (For now for old we do PIO only for
 23  *      ATAPI)
 24  *      Review Sunblade workaround.
 25  */
 26 
 27 #include <linux/kernel.h>
 28 #include <linux/module.h>
 29 #include <linux/pci.h>
 30 #include <linux/init.h>
 31 #include <linux/blkdev.h>
 32 #include <linux/delay.h>
 33 #include <scsi/scsi_host.h>
 34 #include <linux/libata.h>
 35 #include <linux/dmi.h>
 36 
 37 #define DRV_NAME "pata_ali"
 38 #define DRV_VERSION "0.7.8"
 39 
 40 static int ali_atapi_dma = 0;
 41 module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
 42 MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
 43 
 44 static struct pci_dev *ali_isa_bridge;
 45 
 46 /*
 47  *      Cable special cases
 48  */
 49 
 50 static const struct dmi_system_id cable_dmi_table[] = {
 51         {
 52                 .ident = "HP Pavilion N5430",
 53                 .matches = {
 54                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 55                         DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 56                 },
 57         },
 58         {
 59                 .ident = "Toshiba Satellite S1800-814",
 60                 .matches = {
 61                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 62                         DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
 63                 },
 64         },
 65         { }
 66 };
 67 
 68 static int ali_cable_override(struct pci_dev *pdev)
 69 {
 70         /* Fujitsu P2000 */
 71         if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
 72                 return 1;
 73         /* Mitac 8317 (Winbook-A) and relatives */
 74         if (pdev->subsystem_vendor == 0x1071 && pdev->subsystem_device == 0x8317)
 75                 return 1;
 76         /* Systems by DMI */
 77         if (dmi_check_system(cable_dmi_table))
 78                 return 1;
 79         return 0;
 80 }
 81 
 82 /**
 83  *      ali_c2_cable_detect     -       cable detection
 84  *      @ap: ATA port
 85  *
 86  *      Perform cable detection for C2 and later revisions
 87  */
 88 
 89 static int ali_c2_cable_detect(struct ata_port *ap)
 90 {
 91         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 92         u8 ata66;
 93 
 94         /* Certain laptops use short but suitable cables and don't
 95            implement the detect logic */
 96 
 97         if (ali_cable_override(pdev))
 98                 return ATA_CBL_PATA40_SHORT;
 99 
100         /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
101            Bit set for 40 pin */
102         pci_read_config_byte(pdev, 0x4A, &ata66);
103         if (ata66 & (1 << ap->port_no))
104                 return ATA_CBL_PATA40;
105         else
106                 return ATA_CBL_PATA80;
107 }
108 
109 /**
110  *      ali_20_filter           -       filter for earlier ALI DMA
111  *      @ap: ALi ATA port
112  *      @adev: attached device
113  *
114  *      Ensure that we do not do DMA on CD devices. We may be able to
115  *      fix that later on. Also ensure we do not do UDMA on WDC drives
116  */
117 
118 static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
119 {
120         char model_num[ATA_ID_PROD_LEN + 1];
121         /* No DMA on anything but a disk for now */
122         if (adev->class != ATA_DEV_ATA)
123                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
124         ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
125         if (strstr(model_num, "WDC"))
126                 return mask &= ~ATA_MASK_UDMA;
127         return mask;
128 }
129 
130 /**
131  *      ali_fifo_control        -       FIFO manager
132  *      @ap: ALi channel to control
133  *      @adev: device for FIFO control
134  *      @on: 0 for off 1 for on
135  *
136  *      Enable or disable the FIFO on a given device. Because of the way the
137  *      ALi FIFO works it provides a boost on ATA disk but can be confused by
138  *      ATAPI and we must therefore manage it.
139  */
140 
141 static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
142 {
143         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
144         int pio_fifo = 0x54 + ap->port_no;
145         u8 fifo;
146         int shift = 4 * adev->devno;
147 
148         /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
149            0x00. Not all the docs agree but the behaviour we now use is the
150            one stated in the BIOS Programming Guide */
151 
152         pci_read_config_byte(pdev, pio_fifo, &fifo);
153         fifo &= ~(0x0F << shift);
154         fifo |= (on << shift);
155         pci_write_config_byte(pdev, pio_fifo, fifo);
156 }
157 
158 /**
159  *      ali_program_modes       -       load mode registers
160  *      @ap: ALi channel to load
161  *      @adev: Device the timing is for
162  *      @t: timing data
163  *      @ultra: UDMA timing or zero for off
164  *
165  *      Loads the timing registers for cmd/data and disable UDMA if
166  *      ultra is zero. If ultra is set then load and enable the UDMA
167  *      timing but do not touch the command/data timing.
168  */
169 
170 static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
171 {
172         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
173         int cas = 0x58 + 4 * ap->port_no;       /* Command timing */
174         int cbt = 0x59 + 4 * ap->port_no;       /* Command timing */
175         int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
176         int udmat = 0x56 + ap->port_no; /* UDMA timing */
177         int shift = 4 * adev->devno;
178         u8 udma;
179 
180         if (t != NULL) {
181                 t->setup = clamp_val(t->setup, 1, 8) & 7;
182                 t->act8b = clamp_val(t->act8b, 1, 8) & 7;
183                 t->rec8b = clamp_val(t->rec8b, 1, 16) & 15;
184                 t->active = clamp_val(t->active, 1, 8) & 7;
185                 t->recover = clamp_val(t->recover, 1, 16) & 15;
186 
187                 pci_write_config_byte(pdev, cas, t->setup);
188                 pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
189                 pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
190         }
191 
192         /* Set up the UDMA enable */
193         pci_read_config_byte(pdev, udmat, &udma);
194         udma &= ~(0x0F << shift);
195         udma |= ultra << shift;
196         pci_write_config_byte(pdev, udmat, udma);
197 }
198 
199 /**
200  *      ali_set_piomode -       set initial PIO mode data
201  *      @ap: ATA interface
202  *      @adev: ATA device
203  *
204  *      Program the ALi registers for PIO mode.
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  *      Program the ALi registers for DMA mode.
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_warn(adev,
291                              "WARNING: ATAPI DMA disabled for reliability issues.  It can be enabled\n");
292                 ata_dev_warn(adev,
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 void ali_c2_c3_postreset(struct ata_link *link, unsigned int *classes)
342 {
343         u8 r;
344         int port_bit = 4 << link->ap->port_no;
345 
346         /* If our bridge is an ALI 1533 then do the extra work */
347         if (ali_isa_bridge) {
348                 /* Tristate and re-enable the bus signals */
349                 pci_read_config_byte(ali_isa_bridge, 0x58, &r);
350                 r &= ~port_bit;
351                 pci_write_config_byte(ali_isa_bridge, 0x58, r);
352                 r |= port_bit;
353                 pci_write_config_byte(ali_isa_bridge, 0x58, r);
354         }
355         ata_sff_postreset(link, classes);
356 }
357 
358 static struct scsi_host_template ali_sht = {
359         ATA_BMDMA_SHT(DRV_NAME),
360 };
361 
362 /*
363  *      Port operations for PIO only ALi
364  */
365 
366 static struct ata_port_operations ali_early_port_ops = {
367         .inherits       = &ata_sff_port_ops,
368         .cable_detect   = ata_cable_40wire,
369         .set_piomode    = ali_set_piomode,
370         .sff_data_xfer  = ata_sff_data_xfer32,
371 };
372 
373 static const struct ata_port_operations ali_dma_base_ops = {
374         .inherits       = &ata_bmdma32_port_ops,
375         .set_piomode    = ali_set_piomode,
376         .set_dmamode    = ali_set_dmamode,
377 };
378 
379 /*
380  *      Port operations for DMA capable ALi without cable
381  *      detect
382  */
383 static struct ata_port_operations ali_20_port_ops = {
384         .inherits       = &ali_dma_base_ops,
385         .cable_detect   = ata_cable_40wire,
386         .mode_filter    = ali_20_filter,
387         .check_atapi_dma = ali_check_atapi_dma,
388         .dev_config     = ali_lock_sectors,
389 };
390 
391 /*
392  *      Port operations for DMA capable ALi with cable detect
393  */
394 static struct ata_port_operations ali_c2_port_ops = {
395         .inherits       = &ali_dma_base_ops,
396         .check_atapi_dma = ali_check_atapi_dma,
397         .cable_detect   = ali_c2_cable_detect,
398         .dev_config     = ali_lock_sectors,
399         .postreset      = ali_c2_c3_postreset,
400 };
401 
402 /*
403  *      Port operations for DMA capable ALi with cable detect
404  */
405 static struct ata_port_operations ali_c4_port_ops = {
406         .inherits       = &ali_dma_base_ops,
407         .check_atapi_dma = ali_check_atapi_dma,
408         .cable_detect   = ali_c2_cable_detect,
409         .dev_config     = ali_lock_sectors,
410 };
411 
412 /*
413  *      Port operations for DMA capable ALi with cable detect and LBA48
414  */
415 static struct ata_port_operations ali_c5_port_ops = {
416         .inherits       = &ali_dma_base_ops,
417         .check_atapi_dma = ali_check_atapi_dma,
418         .dev_config     = ali_warn_atapi_dma,
419         .cable_detect   = ali_c2_cable_detect,
420 };
421 
422 
423 /**
424  *      ali_init_chipset        -       chip setup function
425  *      @pdev: PCI device of ATA controller
426  *
427  *      Perform the setup on the device that must be done both at boot
428  *      and at resume time.
429  */
430 
431 static void ali_init_chipset(struct pci_dev *pdev)
432 {
433         u8 tmp;
434         struct pci_dev *north;
435 
436         /*
437          * The chipset revision selects the driver operations and
438          * mode data.
439          */
440 
441         if (pdev->revision <= 0x20) {
442                 pci_read_config_byte(pdev, 0x53, &tmp);
443                 tmp |= 0x03;
444                 pci_write_config_byte(pdev, 0x53, tmp);
445         } else {
446                 pci_read_config_byte(pdev, 0x4a, &tmp);
447                 pci_write_config_byte(pdev, 0x4a, tmp | 0x20);
448                 pci_read_config_byte(pdev, 0x4B, &tmp);
449                 if (pdev->revision < 0xC2)
450                         /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
451                         /* Clear CD-ROM DMA write bit */
452                         tmp &= 0x7F;
453                 /* Cable and UDMA */
454                 if (pdev->revision >= 0xc2)
455                         tmp |= 0x01;
456                 pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
457                 /*
458                  * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
459                  * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
460                  * via 0x54/55.
461                  */
462                 pci_read_config_byte(pdev, 0x53, &tmp);
463                 if (pdev->revision >= 0xc7)
464                         tmp |= 0x03;
465                 else
466                         tmp |= 0x01;    /* CD_ROM enable for DMA */
467                 pci_write_config_byte(pdev, 0x53, tmp);
468         }
469         north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
470         if (north && north->vendor == PCI_VENDOR_ID_AL && ali_isa_bridge) {
471                 /* Configure the ALi bridge logic. For non ALi rely on BIOS.
472                    Set the south bridge enable bit */
473                 pci_read_config_byte(ali_isa_bridge, 0x79, &tmp);
474                 if (pdev->revision == 0xC2)
475                         pci_write_config_byte(ali_isa_bridge, 0x79, tmp | 0x04);
476                 else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
477                         pci_write_config_byte(ali_isa_bridge, 0x79, tmp | 0x02);
478         }
479         pci_dev_put(north);
480         ata_pci_bmdma_clear_simplex(pdev);
481 }
482 /**
483  *      ali_init_one            -       discovery callback
484  *      @pdev: PCI device ID
485  *      @id: PCI table info
486  *
487  *      An ALi IDE interface has been discovered. Figure out what revision
488  *      and perform configuration work before handing it to the ATA layer
489  */
490 
491 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
492 {
493         static const struct ata_port_info info_early = {
494                 .flags = ATA_FLAG_SLAVE_POSS,
495                 .pio_mask = ATA_PIO4,
496                 .port_ops = &ali_early_port_ops
497         };
498         /* Revision 0x20 added DMA */
499         static const struct ata_port_info info_20 = {
500                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
501                                                         ATA_FLAG_IGN_SIMPLEX,
502                 .pio_mask = ATA_PIO4,
503                 .mwdma_mask = ATA_MWDMA2,
504                 .port_ops = &ali_20_port_ops
505         };
506         /* Revision 0x20 with support logic added UDMA */
507         static const struct ata_port_info info_20_udma = {
508                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
509                                                         ATA_FLAG_IGN_SIMPLEX,
510                 .pio_mask = ATA_PIO4,
511                 .mwdma_mask = ATA_MWDMA2,
512                 .udma_mask = ATA_UDMA2,
513                 .port_ops = &ali_20_port_ops
514         };
515         /* Revision 0xC2 adds UDMA66 */
516         static const struct ata_port_info info_c2 = {
517                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
518                                                         ATA_FLAG_IGN_SIMPLEX,
519                 .pio_mask = ATA_PIO4,
520                 .mwdma_mask = ATA_MWDMA2,
521                 .udma_mask = ATA_UDMA4,
522                 .port_ops = &ali_c2_port_ops
523         };
524         /* Revision 0xC3 is UDMA66 for now */
525         static const struct ata_port_info info_c3 = {
526                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
527                                                         ATA_FLAG_IGN_SIMPLEX,
528                 .pio_mask = ATA_PIO4,
529                 .mwdma_mask = ATA_MWDMA2,
530                 .udma_mask = ATA_UDMA4,
531                 .port_ops = &ali_c2_port_ops
532         };
533         /* Revision 0xC4 is UDMA100 */
534         static const struct ata_port_info info_c4 = {
535                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
536                                                         ATA_FLAG_IGN_SIMPLEX,
537                 .pio_mask = ATA_PIO4,
538                 .mwdma_mask = ATA_MWDMA2,
539                 .udma_mask = ATA_UDMA5,
540                 .port_ops = &ali_c4_port_ops
541         };
542         /* Revision 0xC5 is UDMA133 with LBA48 DMA */
543         static const struct ata_port_info info_c5 = {
544                 .flags = ATA_FLAG_SLAVE_POSS |  ATA_FLAG_IGN_SIMPLEX,
545                 .pio_mask = ATA_PIO4,
546                 .mwdma_mask = ATA_MWDMA2,
547                 .udma_mask = ATA_UDMA6,
548                 .port_ops = &ali_c5_port_ops
549         };
550 
551         const struct ata_port_info *ppi[] = { NULL, NULL };
552         u8 tmp;
553         int rc;
554 
555         rc = pcim_enable_device(pdev);
556         if (rc)
557                 return rc;
558 
559         /*
560          * The chipset revision selects the driver operations and
561          * mode data.
562          */
563 
564         if (pdev->revision < 0x20) {
565                 ppi[0] = &info_early;
566         } else if (pdev->revision < 0xC2) {
567                 ppi[0] = &info_20;
568         } else if (pdev->revision == 0xC2) {
569                 ppi[0] = &info_c2;
570         } else if (pdev->revision == 0xC3) {
571                 ppi[0] = &info_c3;
572         } else if (pdev->revision == 0xC4) {
573                 ppi[0] = &info_c4;
574         } else
575                 ppi[0] = &info_c5;
576 
577         ali_init_chipset(pdev);
578 
579         if (ali_isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
580                 /* Are we paired with a UDMA capable chip */
581                 pci_read_config_byte(ali_isa_bridge, 0x5E, &tmp);
582                 if ((tmp & 0x1E) == 0x12)
583                         ppi[0] = &info_20_udma;
584         }
585 
586         if (!ppi[0]->mwdma_mask && !ppi[0]->udma_mask)
587                 return ata_pci_sff_init_one(pdev, ppi, &ali_sht, NULL, 0);
588         else
589                 return ata_pci_bmdma_init_one(pdev, ppi, &ali_sht, NULL, 0);
590 }
591 
592 #ifdef CONFIG_PM_SLEEP
593 static int ali_reinit_one(struct pci_dev *pdev)
594 {
595         struct ata_host *host = pci_get_drvdata(pdev);
596         int rc;
597 
598         rc = ata_pci_device_do_resume(pdev);
599         if (rc)
600                 return rc;
601         ali_init_chipset(pdev);
602         ata_host_resume(host);
603         return 0;
604 }
605 #endif
606 
607 static const struct pci_device_id ali[] = {
608         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
609         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
610 
611         { },
612 };
613 
614 static struct pci_driver ali_pci_driver = {
615         .name           = DRV_NAME,
616         .id_table       = ali,
617         .probe          = ali_init_one,
618         .remove         = ata_pci_remove_one,
619 #ifdef CONFIG_PM_SLEEP
620         .suspend        = ata_pci_device_suspend,
621         .resume         = ali_reinit_one,
622 #endif
623 };
624 
625 static int __init ali_init(void)
626 {
627         int ret;
628         ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
629 
630         ret = pci_register_driver(&ali_pci_driver);
631         if (ret < 0)
632                 pci_dev_put(ali_isa_bridge);
633         return ret;
634 }
635 
636 
637 static void __exit ali_exit(void)
638 {
639         pci_unregister_driver(&ali_pci_driver);
640         pci_dev_put(ali_isa_bridge);
641 }
642 
643 
644 MODULE_AUTHOR("Alan Cox");
645 MODULE_DESCRIPTION("low-level driver for ALi PATA");
646 MODULE_LICENSE("GPL");
647 MODULE_DEVICE_TABLE(pci, ali);
648 MODULE_VERSION(DRV_VERSION);
649 
650 module_init(ali_init);
651 module_exit(ali_exit);
652 

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