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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [ata/] [pata_ali.c] - Blame information for rev 62

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1 62 marcus.erl
/*
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
/*
40
 *      Cable special cases
41
 */
42
 
43
static const struct dmi_system_id cable_dmi_table[] = {
44
        {
45
                .ident = "HP Pavilion N5430",
46
                .matches = {
47
                        DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
48
                        DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
49
                },
50
        },
51
        {
52
                .ident = "Toshiba Satelite S1800-814",
53
                .matches = {
54
                        DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
55
                        DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
56
                },
57
        },
58
        { }
59
};
60
 
61
static int ali_cable_override(struct pci_dev *pdev)
62
{
63
        /* Fujitsu P2000 */
64
        if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
65
                return 1;
66
        /* Mitac 8317 (Winbook-A) and relatives */
67
        if (pdev->subsystem_vendor == 0x1071  && pdev->subsystem_device == 0x8317)
68
                return 1;
69
        /* Systems by DMI */
70
        if (dmi_check_system(cable_dmi_table))
71
                return 1;
72
        return 0;
73
}
74
 
75
/**
76
 *      ali_c2_cable_detect     -       cable detection
77
 *      @ap: ATA port
78
 *
79
 *      Perform cable detection for C2 and later revisions
80
 */
81
 
82
static int ali_c2_cable_detect(struct ata_port *ap)
83
{
84
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85
        u8 ata66;
86
 
87
        /* Certain laptops use short but suitable cables and don't
88
           implement the detect logic */
89
 
90
        if (ali_cable_override(pdev))
91
                return ATA_CBL_PATA40_SHORT;
92
 
93
        /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
94
           Bit set for 40 pin */
95
        pci_read_config_byte(pdev, 0x4A, &ata66);
96
        if (ata66 & (1 << ap->port_no))
97
                return ATA_CBL_PATA40;
98
        else
99
                return ATA_CBL_PATA80;
100
}
101
 
102
/**
103
 *      ali_20_filter           -       filter for earlier ALI DMA
104
 *      @ap: ALi ATA port
105
 *      @adev: attached device
106
 *
107
 *      Ensure that we do not do DMA on CD devices. We may be able to
108
 *      fix that later on. Also ensure we do not do UDMA on WDC drives
109
 */
110
 
111
static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
112
{
113
        char model_num[ATA_ID_PROD_LEN + 1];
114
        /* No DMA on anything but a disk for now */
115
        if (adev->class != ATA_DEV_ATA)
116
                mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
117
        ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
118
        if (strstr(model_num, "WDC"))
119
                return mask &= ~ATA_MASK_UDMA;
120
        return ata_pci_default_filter(adev, mask);
121
}
122
 
123
/**
124
 *      ali_fifo_control        -       FIFO manager
125
 *      @ap: ALi channel to control
126
 *      @adev: device for FIFO control
127
 *      @on: 0 for off 1 for on
128
 *
129
 *      Enable or disable the FIFO on a given device. Because of the way the
130
 *      ALi FIFO works it provides a boost on ATA disk but can be confused by
131
 *      ATAPI and we must therefore manage it.
132
 */
133
 
134
static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
135
{
136
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
137
        int pio_fifo = 0x54 + ap->port_no;
138
        u8 fifo;
139
        int shift = 4 * adev->devno;
140
 
141
        /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
142
           0x00. Not all the docs agree but the behaviour we now use is the
143
           one stated in the BIOS Programming Guide */
144
 
145
        pci_read_config_byte(pdev, pio_fifo, &fifo);
146
        fifo &= ~(0x0F << shift);
147
        if (on)
148
                fifo |= (on << shift);
149
        pci_write_config_byte(pdev, pio_fifo, fifo);
150
}
151
 
152
/**
153
 *      ali_program_modes       -       load mode registers
154
 *      @ap: ALi channel to load
155
 *      @adev: Device the timing is for
156
 *      @cmd: Command timing
157
 *      @data: Data timing
158
 *      @ultra: UDMA timing or zero for off
159
 *
160
 *      Loads the timing registers for cmd/data and disable UDMA if
161
 *      ultra is zero. If ultra is set then load and enable the UDMA
162
 *      timing but do not touch the command/data timing.
163
 */
164
 
165
static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
166
{
167
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
168
        int cas = 0x58 + 4 * ap->port_no;       /* Command timing */
169
        int cbt = 0x59 + 4 * ap->port_no;       /* Command timing */
170
        int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
171
        int udmat = 0x56 + ap->port_no; /* UDMA timing */
172
        int shift = 4 * adev->devno;
173
        u8 udma;
174
 
175
        if (t != NULL) {
176
                t->setup = FIT(t->setup, 1, 8) & 7;
177
                t->act8b = FIT(t->act8b, 1, 8) & 7;
178
                t->rec8b = FIT(t->rec8b, 1, 16) & 15;
179
                t->active = FIT(t->active, 1, 8) & 7;
180
                t->recover = FIT(t->recover, 1, 16) & 15;
181
 
182
                pci_write_config_byte(pdev, cas, t->setup);
183
                pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
184
                pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
185
        }
186
 
187
        /* Set up the UDMA enable */
188
        pci_read_config_byte(pdev, udmat, &udma);
189
        udma &= ~(0x0F << shift);
190
        udma |= ultra << shift;
191
        pci_write_config_byte(pdev, udmat, udma);
192
}
193
 
194
/**
195
 *      ali_set_piomode -       set initial PIO mode data
196
 *      @ap: ATA interface
197
 *      @adev: ATA device
198
 *
199
 *      Program the ALi registers for PIO mode. FIXME: add timings for
200
 *      PIO5.
201
 */
202
 
203
static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
204
{
205
        struct ata_device *pair = ata_dev_pair(adev);
206
        struct ata_timing t;
207
        unsigned long T =  1000000000 / 33333;  /* PCI clock based */
208
 
209
        ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
210
        if (pair) {
211
                struct ata_timing p;
212
                ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
213
                ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
214
                if (pair->dma_mode) {
215
                        ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
216
                        ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
217
                }
218
        }
219
 
220
        /* PIO FIFO is only permitted on ATA disk */
221
        if (adev->class != ATA_DEV_ATA)
222
                ali_fifo_control(ap, adev, 0x00);
223
        ali_program_modes(ap, adev, &t, 0);
224
        if (adev->class == ATA_DEV_ATA)
225
                ali_fifo_control(ap, adev, 0x05);
226
 
227
}
228
 
229
/**
230
 *      ali_set_dmamode -       set initial DMA mode data
231
 *      @ap: ATA interface
232
 *      @adev: ATA device
233
 *
234
 *      FIXME: MWDMA timings
235
 */
236
 
237
static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
238
{
239
        static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
240
        struct ata_device *pair = ata_dev_pair(adev);
241
        struct ata_timing t;
242
        unsigned long T =  1000000000 / 33333;  /* PCI clock based */
243
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
244
 
245
 
246
        if (adev->class == ATA_DEV_ATA)
247
                ali_fifo_control(ap, adev, 0x08);
248
 
249
        if (adev->dma_mode >= XFER_UDMA_0) {
250
                ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
251
                if (adev->dma_mode >= XFER_UDMA_3) {
252
                        u8 reg4b;
253
                        pci_read_config_byte(pdev, 0x4B, &reg4b);
254
                        reg4b |= 1;
255
                        pci_write_config_byte(pdev, 0x4B, reg4b);
256
                }
257
        } else {
258
                ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
259
                if (pair) {
260
                        struct ata_timing p;
261
                        ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
262
                        ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
263
                        if (pair->dma_mode) {
264
                                ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
265
                                ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
266
                        }
267
                }
268
                ali_program_modes(ap, adev, &t, 0);
269
        }
270
}
271
 
272
/**
273
 *      ali_lock_sectors        -       Keep older devices to 255 sector mode
274
 *      @adev: Device
275
 *
276
 *      Called during the bus probe for each device that is found. We use
277
 *      this call to lock the sector count of the device to 255 or less on
278
 *      older ALi controllers. If we didn't do this then large I/O's would
279
 *      require LBA48 commands which the older ALi requires are issued by
280
 *      slower PIO methods
281
 */
282
 
283
static void ali_lock_sectors(struct ata_device *adev)
284
{
285
        adev->max_sectors = 255;
286
}
287
 
288
/**
289
 *      ali_check_atapi_dma     -       DMA check for most ALi controllers
290
 *      @adev: Device
291
 *
292
 *      Called to decide whether commands should be sent by DMA or PIO
293
 */
294
 
295
static int ali_check_atapi_dma(struct ata_queued_cmd *qc)
296
{
297
        /* If its not a media command, its not worth it */
298
        if (qc->nbytes < 2048)
299
                return -EOPNOTSUPP;
300
        return 0;
301
}
302
 
303
static struct scsi_host_template ali_sht = {
304
        .module                 = THIS_MODULE,
305
        .name                   = DRV_NAME,
306
        .ioctl                  = ata_scsi_ioctl,
307
        .queuecommand           = ata_scsi_queuecmd,
308
        .can_queue              = ATA_DEF_QUEUE,
309
        .this_id                = ATA_SHT_THIS_ID,
310
        .sg_tablesize           = LIBATA_MAX_PRD,
311
        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
312
        .emulated               = ATA_SHT_EMULATED,
313
        .use_clustering         = ATA_SHT_USE_CLUSTERING,
314
        .proc_name              = DRV_NAME,
315
        .dma_boundary           = ATA_DMA_BOUNDARY,
316
        .slave_configure        = ata_scsi_slave_config,
317
        .slave_destroy          = ata_scsi_slave_destroy,
318
        .bios_param             = ata_std_bios_param,
319
};
320
 
321
/*
322
 *      Port operations for PIO only ALi
323
 */
324
 
325
static struct ata_port_operations ali_early_port_ops = {
326
        .set_piomode    = ali_set_piomode,
327
        .tf_load        = ata_tf_load,
328
        .tf_read        = ata_tf_read,
329
        .check_status   = ata_check_status,
330
        .exec_command   = ata_exec_command,
331
        .dev_select     = ata_std_dev_select,
332
 
333
        .freeze         = ata_bmdma_freeze,
334
        .thaw           = ata_bmdma_thaw,
335
        .error_handler  = ata_bmdma_error_handler,
336
        .post_internal_cmd = ata_bmdma_post_internal_cmd,
337
        .cable_detect   = ata_cable_40wire,
338
 
339
        .qc_prep        = ata_qc_prep,
340
        .qc_issue       = ata_qc_issue_prot,
341
 
342
        .data_xfer      = ata_data_xfer,
343
 
344
        .irq_handler    = ata_interrupt,
345
        .irq_clear      = ata_bmdma_irq_clear,
346
        .irq_on         = ata_irq_on,
347
 
348
        .port_start     = ata_sff_port_start,
349
};
350
 
351
/*
352
 *      Port operations for DMA capable ALi without cable
353
 *      detect
354
 */
355
static struct ata_port_operations ali_20_port_ops = {
356
        .set_piomode    = ali_set_piomode,
357
        .set_dmamode    = ali_set_dmamode,
358
        .mode_filter    = ali_20_filter,
359
 
360
        .tf_load        = ata_tf_load,
361
        .tf_read        = ata_tf_read,
362
        .check_status   = ata_check_status,
363
        .exec_command   = ata_exec_command,
364
        .dev_select     = ata_std_dev_select,
365
        .dev_config     = ali_lock_sectors,
366
 
367
        .freeze         = ata_bmdma_freeze,
368
        .thaw           = ata_bmdma_thaw,
369
        .error_handler  = ata_bmdma_error_handler,
370
        .post_internal_cmd = ata_bmdma_post_internal_cmd,
371
        .cable_detect   = ata_cable_40wire,
372
 
373
        .bmdma_setup    = ata_bmdma_setup,
374
        .bmdma_start    = ata_bmdma_start,
375
        .bmdma_stop     = ata_bmdma_stop,
376
        .bmdma_status   = ata_bmdma_status,
377
 
378
        .qc_prep        = ata_qc_prep,
379
        .qc_issue       = ata_qc_issue_prot,
380
 
381
        .data_xfer      = ata_data_xfer,
382
 
383
        .irq_handler    = ata_interrupt,
384
        .irq_clear      = ata_bmdma_irq_clear,
385
        .irq_on         = ata_irq_on,
386
 
387
        .port_start     = ata_sff_port_start,
388
};
389
 
390
/*
391
 *      Port operations for DMA capable ALi with cable detect
392
 */
393
static struct ata_port_operations ali_c2_port_ops = {
394
        .set_piomode    = ali_set_piomode,
395
        .set_dmamode    = ali_set_dmamode,
396
        .mode_filter    = ata_pci_default_filter,
397
        .tf_load        = ata_tf_load,
398
        .tf_read        = ata_tf_read,
399
        .check_atapi_dma = ali_check_atapi_dma,
400
        .check_status   = ata_check_status,
401
        .exec_command   = ata_exec_command,
402
        .dev_select     = ata_std_dev_select,
403
        .dev_config     = ali_lock_sectors,
404
 
405
        .freeze         = ata_bmdma_freeze,
406
        .thaw           = ata_bmdma_thaw,
407
        .error_handler  = ata_bmdma_error_handler,
408
        .post_internal_cmd = ata_bmdma_post_internal_cmd,
409
        .cable_detect   = ali_c2_cable_detect,
410
 
411
        .bmdma_setup    = ata_bmdma_setup,
412
        .bmdma_start    = ata_bmdma_start,
413
        .bmdma_stop     = ata_bmdma_stop,
414
        .bmdma_status   = ata_bmdma_status,
415
 
416
        .qc_prep        = ata_qc_prep,
417
        .qc_issue       = ata_qc_issue_prot,
418
 
419
        .data_xfer      = ata_data_xfer,
420
 
421
        .irq_handler    = ata_interrupt,
422
        .irq_clear      = ata_bmdma_irq_clear,
423
        .irq_on         = ata_irq_on,
424
 
425
        .port_start     = ata_sff_port_start,
426
};
427
 
428
/*
429
 *      Port operations for DMA capable ALi with cable detect and LBA48
430
 */
431
static struct ata_port_operations ali_c5_port_ops = {
432
        .set_piomode    = ali_set_piomode,
433
        .set_dmamode    = ali_set_dmamode,
434
        .mode_filter    = ata_pci_default_filter,
435
        .tf_load        = ata_tf_load,
436
        .tf_read        = ata_tf_read,
437
        .check_atapi_dma = ali_check_atapi_dma,
438
        .check_status   = ata_check_status,
439
        .exec_command   = ata_exec_command,
440
        .dev_select     = ata_std_dev_select,
441
 
442
        .freeze         = ata_bmdma_freeze,
443
        .thaw           = ata_bmdma_thaw,
444
        .error_handler  = ata_bmdma_error_handler,
445
        .post_internal_cmd = ata_bmdma_post_internal_cmd,
446
        .cable_detect   = ali_c2_cable_detect,
447
 
448
        .bmdma_setup    = ata_bmdma_setup,
449
        .bmdma_start    = ata_bmdma_start,
450
        .bmdma_stop     = ata_bmdma_stop,
451
        .bmdma_status   = ata_bmdma_status,
452
 
453
        .qc_prep        = ata_qc_prep,
454
        .qc_issue       = ata_qc_issue_prot,
455
 
456
        .data_xfer      = ata_data_xfer,
457
 
458
        .irq_handler    = ata_interrupt,
459
        .irq_clear      = ata_bmdma_irq_clear,
460
        .irq_on         = ata_irq_on,
461
 
462
        .port_start     = ata_sff_port_start,
463
};
464
 
465
 
466
/**
467
 *      ali_init_chipset        -       chip setup function
468
 *      @pdev: PCI device of ATA controller
469
 *
470
 *      Perform the setup on the device that must be done both at boot
471
 *      and at resume time.
472
 */
473
 
474
static void ali_init_chipset(struct pci_dev *pdev)
475
{
476
        u8 tmp;
477
        struct pci_dev *north, *isa_bridge;
478
 
479
        /*
480
         * The chipset revision selects the driver operations and
481
         * mode data.
482
         */
483
 
484
        if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
485
                /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
486
                pci_read_config_byte(pdev, 0x4B, &tmp);
487
                /* Clear CD-ROM DMA write bit */
488
                tmp &= 0x7F;
489
                pci_write_config_byte(pdev, 0x4B, tmp);
490
        } else if (pdev->revision >= 0xC2) {
491
                /* Enable cable detection logic */
492
                pci_read_config_byte(pdev, 0x4B, &tmp);
493
                pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
494
        }
495
        north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
496
        isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
497
 
498
        if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
499
                /* Configure the ALi bridge logic. For non ALi rely on BIOS.
500
                   Set the south bridge enable bit */
501
                pci_read_config_byte(isa_bridge, 0x79, &tmp);
502
                if (pdev->revision == 0xC2)
503
                        pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
504
                else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
505
                        pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
506
        }
507
        if (pdev->revision >= 0x20) {
508
                /*
509
                 * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
510
                 * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
511
                 * via 0x54/55.
512
                 */
513
                pci_read_config_byte(pdev, 0x53, &tmp);
514
                if (pdev->revision <= 0x20)
515
                        tmp &= ~0x02;
516
                if (pdev->revision >= 0xc7)
517
                        tmp |= 0x03;
518
                else
519
                        tmp |= 0x01;    /* CD_ROM enable for DMA */
520
                pci_write_config_byte(pdev, 0x53, tmp);
521
        }
522
        pci_dev_put(isa_bridge);
523
        pci_dev_put(north);
524
        ata_pci_clear_simplex(pdev);
525
}
526
/**
527
 *      ali_init_one            -       discovery callback
528
 *      @pdev: PCI device ID
529
 *      @id: PCI table info
530
 *
531
 *      An ALi IDE interface has been discovered. Figure out what revision
532
 *      and perform configuration work before handing it to the ATA layer
533
 */
534
 
535
static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
536
{
537
        static const struct ata_port_info info_early = {
538
                .sht = &ali_sht,
539
                .flags = ATA_FLAG_SLAVE_POSS,
540
                .pio_mask = 0x1f,
541
                .port_ops = &ali_early_port_ops
542
        };
543
        /* Revision 0x20 added DMA */
544
        static const struct ata_port_info info_20 = {
545
                .sht = &ali_sht,
546
                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
547
                .pio_mask = 0x1f,
548
                .mwdma_mask = 0x07,
549
                .port_ops = &ali_20_port_ops
550
        };
551
        /* Revision 0x20 with support logic added UDMA */
552
        static const struct ata_port_info info_20_udma = {
553
                .sht = &ali_sht,
554
                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
555
                .pio_mask = 0x1f,
556
                .mwdma_mask = 0x07,
557
                .udma_mask = 0x07,      /* UDMA33 */
558
                .port_ops = &ali_20_port_ops
559
        };
560
        /* Revision 0xC2 adds UDMA66 */
561
        static const struct ata_port_info info_c2 = {
562
                .sht = &ali_sht,
563
                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
564
                .pio_mask = 0x1f,
565
                .mwdma_mask = 0x07,
566
                .udma_mask = ATA_UDMA4,
567
                .port_ops = &ali_c2_port_ops
568
        };
569
        /* Revision 0xC3 is UDMA66 for now */
570
        static const struct ata_port_info info_c3 = {
571
                .sht = &ali_sht,
572
                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
573
                .pio_mask = 0x1f,
574
                .mwdma_mask = 0x07,
575
                .udma_mask = ATA_UDMA4,
576
                .port_ops = &ali_c2_port_ops
577
        };
578
        /* Revision 0xC4 is UDMA100 */
579
        static const struct ata_port_info info_c4 = {
580
                .sht = &ali_sht,
581
                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
582
                .pio_mask = 0x1f,
583
                .mwdma_mask = 0x07,
584
                .udma_mask = ATA_UDMA5,
585
                .port_ops = &ali_c2_port_ops
586
        };
587
        /* Revision 0xC5 is UDMA133 with LBA48 DMA */
588
        static const struct ata_port_info info_c5 = {
589
                .sht = &ali_sht,
590
                .flags = ATA_FLAG_SLAVE_POSS,
591
                .pio_mask = 0x1f,
592
                .mwdma_mask = 0x07,
593
                .udma_mask = ATA_UDMA6,
594
                .port_ops = &ali_c5_port_ops
595
        };
596
 
597
        const struct ata_port_info *ppi[] = { NULL, NULL };
598
        u8 tmp;
599
        struct pci_dev *isa_bridge;
600
 
601
        /*
602
         * The chipset revision selects the driver operations and
603
         * mode data.
604
         */
605
 
606
        if (pdev->revision < 0x20) {
607
                ppi[0] = &info_early;
608
        } else if (pdev->revision < 0xC2) {
609
                ppi[0] = &info_20;
610
        } else if (pdev->revision == 0xC2) {
611
                ppi[0] = &info_c2;
612
        } else if (pdev->revision == 0xC3) {
613
                ppi[0] = &info_c3;
614
        } else if (pdev->revision == 0xC4) {
615
                ppi[0] = &info_c4;
616
        } else
617
                ppi[0] = &info_c5;
618
 
619
        ali_init_chipset(pdev);
620
 
621
        isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
622
        if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
623
                /* Are we paired with a UDMA capable chip */
624
                pci_read_config_byte(isa_bridge, 0x5E, &tmp);
625
                if ((tmp & 0x1E) == 0x12)
626
                        ppi[0] = &info_20_udma;
627
                pci_dev_put(isa_bridge);
628
        }
629
        return ata_pci_init_one(pdev, ppi);
630
}
631
 
632
#ifdef CONFIG_PM
633
static int ali_reinit_one(struct pci_dev *pdev)
634
{
635
        ali_init_chipset(pdev);
636
        return ata_pci_device_resume(pdev);
637
}
638
#endif
639
 
640
static const struct pci_device_id ali[] = {
641
        { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
642
        { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
643
 
644
        { },
645
};
646
 
647
static struct pci_driver ali_pci_driver = {
648
        .name           = DRV_NAME,
649
        .id_table       = ali,
650
        .probe          = ali_init_one,
651
        .remove         = ata_pci_remove_one,
652
#ifdef CONFIG_PM
653
        .suspend        = ata_pci_device_suspend,
654
        .resume         = ali_reinit_one,
655
#endif
656
};
657
 
658
static int __init ali_init(void)
659
{
660
        return pci_register_driver(&ali_pci_driver);
661
}
662
 
663
 
664
static void __exit ali_exit(void)
665
{
666
        pci_unregister_driver(&ali_pci_driver);
667
}
668
 
669
 
670
MODULE_AUTHOR("Alan Cox");
671
MODULE_DESCRIPTION("low-level driver for ALi PATA");
672
MODULE_LICENSE("GPL");
673
MODULE_DEVICE_TABLE(pci, ali);
674
MODULE_VERSION(DRV_VERSION);
675
 
676
module_init(ali_init);
677
module_exit(ali_exit);

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