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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [pci/] [atiixp.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1275 phoenix
/*
2
 *  linux/drivers/ide/pci/atiixp.c      Version 0.01-bart2      Feb. 26, 2004
3
 *
4
 *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
5
 *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
6
 *
7
 */
8
 
9
#include <linux/config.h>
10
#include <linux/types.h>
11
#include <linux/module.h>
12
#include <linux/kernel.h>
13
#include <linux/ioport.h>
14
#include <linux/pci.h>
15
#include <linux/hdreg.h>
16
#include <linux/ide.h>
17
#include <linux/delay.h>
18
#include <linux/init.h>
19
 
20
#include <asm/io.h>
21
 
22
#include "ide_modes.h"
23
 
24
#define ATIIXP_IDE_PIO_TIMING           0x40
25
#define ATIIXP_IDE_MDMA_TIMING          0x44
26
#define ATIIXP_IDE_PIO_CONTROL          0x48
27
#define ATIIXP_IDE_PIO_MODE             0x4a
28
#define ATIIXP_IDE_UDMA_CONTROL         0x54
29
#define ATIIXP_IDE_UDMA_MODE            0x56
30
 
31
typedef struct {
32
        u8 command_width;
33
        u8 recover_width;
34
} atiixp_ide_timing;
35
 
36
static atiixp_ide_timing pio_timing[] = {
37
        { 0x05, 0x0d },
38
        { 0x04, 0x07 },
39
        { 0x03, 0x04 },
40
        { 0x02, 0x02 },
41
        { 0x02, 0x00 },
42
};
43
 
44
static atiixp_ide_timing mdma_timing[] = {
45
        { 0x07, 0x07 },
46
        { 0x02, 0x01 },
47
        { 0x02, 0x00 },
48
};
49
 
50
static int save_mdma_mode[4];
51
 
52
#define DISPLAY_ATIIXP_TIMINGS
53
 
54
#if defined(DISPLAY_ATIIXP_TIMINGS) && defined(CONFIG_PROC_FS)
55
 
56
#include <linux/stat.h>
57
#include <linux/proc_fs.h>
58
 
59
static u8 atiixp_proc;
60
static struct pci_dev *bmide_dev;
61
 
62
/**
63
 *      atiixp_get_info         -       fill in /proc for ATIIXP IDE
64
 *      @buffer: buffer to fill
65
 *      @addr: address of user start in buffer
66
 *      @offset: offset into 'file'
67
 *      @count: buffer count
68
 *
69
 *      Output summary data on the tuning.
70
 */
71
 
72
static int atiixp_get_info(char *buffer, char **addr, off_t offset, int count)
73
{
74
        char *p = buffer;
75
        struct pci_dev *dev = bmide_dev;
76
        unsigned long bibma = pci_resource_start(dev, 4);
77
        u32 mdma_timing = 0;
78
        u16 udma_mode = 0, pio_mode = 0;
79
        u8 c0, c1, udma_control = 0;
80
 
81
        p += sprintf(p, "\n                          ATI ");
82
        p += sprintf(p, "ATIIXP Ultra100 IDE Chipset.\n");
83
 
84
        pci_read_config_byte(dev, ATIIXP_IDE_UDMA_CONTROL, &udma_control);
85
        pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &udma_mode);
86
        pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode);
87
        pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &mdma_timing);
88
 
89
        /*
90
         * at that point bibma+0x2 et bibma+0xa are byte registers
91
         * to investigate:
92
         */
93
        c0 = inb(bibma + 0x02);
94
        c1 = inb(bibma + 0x0a);
95
 
96
        p += sprintf(p, "--------------- Primary Channel "
97
                        "---------------- Secondary Channel "
98
                        "-------------\n");
99
        p += sprintf(p, "                %sabled "
100
                        "                        %sabled\n",
101
                        (c0 & 0x80) ? "dis" : " en",
102
                        (c1 & 0x80) ? "dis" : " en");
103
        p += sprintf(p, "--------------- drive0 --------- drive1 "
104
                        "-------- drive0 ---------- drive1 ------\n");
105
        p += sprintf(p, "DMA enabled:    %s              %s "
106
                        "            %s               %s\n",
107
                        (c0 & 0x20) ? "yes" : "no ",
108
                        (c0 & 0x40) ? "yes" : "no ",
109
                        (c1 & 0x20) ? "yes" : "no ",
110
                        (c1 & 0x40) ? "yes" : "no " );
111
        p += sprintf(p, "UDMA enabled:   %s              %s "
112
                        "            %s               %s\n",
113
                        (udma_control & 0x01) ? "yes" : "no ",
114
                        (udma_control & 0x02) ? "yes" : "no ",
115
                        (udma_control & 0x04) ? "yes" : "no ",
116
                        (udma_control & 0x08) ? "yes" : "no " );
117
        p += sprintf(p, "UDMA mode:      %c                %c "
118
                        "              %c                 %c\n",
119
                        (udma_control & 0x01) ?
120
                        ((udma_mode & 0x07) + 48) : 'X',
121
                        (udma_control & 0x02) ?
122
                        (((udma_mode >> 4) & 0x07) + 48) : 'X',
123
                        (udma_control & 0x04) ?
124
                        (((udma_mode >> 8) & 0x07) + 48) : 'X',
125
                        (udma_control & 0x08) ?
126
                        (((udma_mode >> 12) & 0x07) + 48) : 'X');
127
        p += sprintf(p, "MDMA mode:      %c                %c "
128
                        "              %c                 %c\n",
129
                        (save_mdma_mode[0] && (c0 & 0x20)) ?
130
                        ((save_mdma_mode[0] & 0xf) + 48) : 'X',
131
                        (save_mdma_mode[1] && (c0 & 0x40)) ?
132
                        ((save_mdma_mode[1] & 0xf) + 48) : 'X',
133
                        (save_mdma_mode[2] && (c1 & 0x20)) ?
134
                        ((save_mdma_mode[2] & 0xf) + 48) : 'X',
135
                        (save_mdma_mode[3] && (c1 & 0x40)) ?
136
                        ((save_mdma_mode[3] & 0xf) + 48) : 'X');
137
        p += sprintf(p, "PIO mode:       %c                %c "
138
                        "              %c                 %c\n",
139
                        (c0 & 0x20) ? 'X' : ((pio_mode & 0x07) + 48),
140
                        (c0 & 0x40) ? 'X' : (((pio_mode >> 4) & 0x07) + 48),
141
                        (c1 & 0x20) ? 'X' : (((pio_mode >> 8) & 0x07) + 48),
142
                        (c1 & 0x40) ? 'X' : (((pio_mode >> 12) & 0x07) + 48));
143
 
144
        return p - buffer;      /* => must be less than 4k! */
145
}
146
 
147
static ide_pci_host_proc_t atiixp_procs = {
148
        .name           = "atiixp",
149
        .set            = 1,
150
        .get_info       = atiixp_get_info,
151
};
152
#endif  /* defined(DISPLAY_ATIIXP_TIMINGS) && defined(CONFIG_PROC_FS) */
153
 
154
/**
155
 *      atiixp_ratemask         -       compute rate mask for ATIIXP IDE
156
 *      @drive: IDE drive to compute for
157
 *
158
 *      Returns the available modes for the ATIIXP IDE controller.
159
 */
160
 
161
static u8 atiixp_ratemask(ide_drive_t *drive)
162
{
163
        u8 mode = 3;
164
 
165
        if (!eighty_ninty_three(drive))
166
                mode = min(mode, (u8)1);
167
        return mode;
168
}
169
 
170
/**
171
 *      atiixp_dma_2_pio                -       return the PIO mode matching DMA
172
 *      @xfer_rate: transfer speed
173
 *
174
 *      Returns the nearest equivalent PIO timing for the PIO or DMA
175
 *      mode requested by the controller.
176
 */
177
 
178
static u8 atiixp_dma_2_pio(u8 xfer_rate) {
179
        switch(xfer_rate) {
180
                case XFER_UDMA_6:
181
                case XFER_UDMA_5:
182
                case XFER_UDMA_4:
183
                case XFER_UDMA_3:
184
                case XFER_UDMA_2:
185
                case XFER_UDMA_1:
186
                case XFER_UDMA_0:
187
                case XFER_MW_DMA_2:
188
                case XFER_PIO_4:
189
                        return 4;
190
                case XFER_MW_DMA_1:
191
                case XFER_PIO_3:
192
                        return 3;
193
                case XFER_SW_DMA_2:
194
                case XFER_PIO_2:
195
                        return 2;
196
                case XFER_MW_DMA_0:
197
                case XFER_SW_DMA_1:
198
                case XFER_SW_DMA_0:
199
                case XFER_PIO_1:
200
                case XFER_PIO_0:
201
                case XFER_PIO_SLOW:
202
                default:
203
                        return 0;
204
        }
205
}
206
 
207
static int atiixp_ide_dma_host_on(ide_drive_t *drive)
208
{
209
        struct pci_dev *dev = drive->hwif->pci_dev;
210
        unsigned long flags;
211
        u16 tmp16;
212
 
213
        spin_lock_irqsave(&ide_lock, flags);
214
 
215
        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
216
        if (save_mdma_mode[drive->dn])
217
                tmp16 &= ~(1 << drive->dn);
218
        else
219
                tmp16 |= (1 << drive->dn);
220
        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
221
 
222
        spin_unlock_irqrestore(&ide_lock, flags);
223
 
224
        return __ide_dma_host_on(drive);
225
}
226
 
227
static int atiixp_ide_dma_host_off(ide_drive_t *drive)
228
{
229
        struct pci_dev *dev = drive->hwif->pci_dev;
230
        unsigned long flags;
231
        u16 tmp16;
232
 
233
        spin_lock_irqsave(&ide_lock, flags);
234
 
235
        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
236
        tmp16 &= ~(1 << drive->dn);
237
        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
238
 
239
        spin_unlock_irqrestore(&ide_lock, flags);
240
 
241
        return __ide_dma_host_off(drive);
242
}
243
 
244
/**
245
 *      atiixp_tune_drive               -       tune a drive attached to a ATIIXP
246
 *      @drive: drive to tune
247
 *      @pio: desired PIO mode
248
 *
249
 *      Set the interface PIO mode.
250
 */
251
 
252
static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
253
{
254
        struct pci_dev *dev = drive->hwif->pci_dev;
255
        unsigned long flags;
256
        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
257
        u32 pio_timing_data;
258
        u16 pio_mode_data;
259
 
260
        spin_lock_irqsave(&ide_lock, flags);
261
 
262
        pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
263
        pio_mode_data &= ~(0x07 << (drive->dn * 4));
264
        pio_mode_data |= (pio << (drive->dn * 4));
265
        pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
266
 
267
        pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
268
        pio_timing_data &= ~(0xff << timing_shift);
269
        pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
270
                 (pio_timing[pio].command_width << (timing_shift + 4));
271
        pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
272
 
273
        spin_unlock_irqrestore(&ide_lock, flags);
274
}
275
 
276
/**
277
 *      atiixp_tune_chipset     -       tune a ATIIXP interface
278
 *      @drive: IDE drive to tune
279
 *      @xferspeed: speed to configure
280
 *
281
 *      Set a ATIIXP interface channel to the desired speeds. This involves
282
 *      requires the right timing data into the ATIIXP configuration space
283
 *      then setting the drive parameters appropriately
284
 */
285
 
286
static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
287
{
288
        struct pci_dev *dev = drive->hwif->pci_dev;
289
        unsigned long flags;
290
        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
291
        u32 tmp32;
292
        u16 tmp16;
293
        u8 speed, pio;
294
 
295
        speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);
296
 
297
        spin_lock_irqsave(&ide_lock, flags);
298
 
299
        save_mdma_mode[drive->dn] = 0;
300
        if (speed >= XFER_UDMA_0) {
301
                pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
302
                tmp16 &= ~(0x07 << (drive->dn * 4));
303
                tmp16 |= ((speed & 0x07) << (drive->dn * 4));
304
                pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
305
        } else {
306
                if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
307
                        save_mdma_mode[drive->dn] = speed;
308
                        pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
309
                        tmp32 &= ~(0xff << timing_shift);
310
                        tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
311
                                (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
312
                        pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
313
                }
314
        }
315
 
316
        spin_unlock_irqrestore(&ide_lock, flags);
317
 
318
        if (speed >= XFER_SW_DMA_0)
319
                pio = atiixp_dma_2_pio(speed);
320
        else
321
                pio = speed - XFER_PIO_0;
322
 
323
        atiixp_tuneproc(drive, pio);
324
 
325
        return ide_config_drive_speed(drive, speed);
326
}
327
 
328
/**
329
 *      atiixp_config_drive_for_dma     -       configure drive for DMA
330
 *      @drive: IDE drive to configure
331
 *
332
 *      Set up a ATIIXP interface channel for the best available speed.
333
 *      We prefer UDMA if it is available and then MWDMA. If DMA is
334
 *      not available we switch to PIO and return 0.
335
 */
336
 
337
static int atiixp_config_drive_for_dma(ide_drive_t *drive)
338
{
339
        u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));
340
 
341
        /* If no DMA speed was available then disable DMA and use PIO. */
342
        if (!speed) {
343
                u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
344
                speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
345
        }
346
 
347
        (void) atiixp_speedproc(drive, speed);
348
        return ide_dma_enable(drive);
349
}
350
 
351
/**
352
 *      atiixp_dma_check        -       set up an IDE device
353
 *      @drive: IDE drive to configure
354
 *
355
 *      Set up the ATIIXP interface for the best available speed on this
356
 *      interface, preferring DMA to PIO.
357
 */
358
 
359
static int atiixp_dma_check(ide_drive_t *drive)
360
{
361
        ide_hwif_t *hwif        = HWIF(drive);
362
        struct hd_driveid *id   = drive->id;
363
        u8 tspeed, speed;
364
 
365
        drive->init_speed = 0;
366
 
367
        if ((id->capability & 1) && drive->autodma) {
368
                /* Consult the list of known "bad" drives */
369
                if (__ide_dma_bad_drive(drive))
370
                        goto fast_ata_pio;
371
                if (id->field_valid & 4) {
372
                        if (id->dma_ultra & hwif->ultra_mask) {
373
                                /* Force if Capable UltraDMA */
374
                                if ((id->field_valid & 2) &&
375
                                    (!atiixp_config_drive_for_dma(drive)))
376
                                        goto try_dma_modes;
377
                        }
378
                } else if (id->field_valid & 2) {
379
try_dma_modes:
380
                        if ((id->dma_mword & hwif->mwdma_mask) ||
381
                            (id->dma_1word & hwif->swdma_mask)) {
382
                                /* Force if Capable regular DMA modes */
383
                                if (!atiixp_config_drive_for_dma(drive))
384
                                        goto no_dma_set;
385
                        }
386
                } else if (__ide_dma_good_drive(drive) &&
387
                           (id->eide_dma_time < 150)) {
388
                        /* Consult the list of known "good" drives */
389
                        if (!atiixp_config_drive_for_dma(drive))
390
                                goto no_dma_set;
391
                } else {
392
                        goto fast_ata_pio;
393
                }
394
                return hwif->ide_dma_on(drive);
395
        } else if ((id->capability & 8) || (id->field_valid & 2)) {
396
fast_ata_pio:
397
no_dma_set:
398
                tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
399
                speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
400
                hwif->speedproc(drive, speed);
401
                return hwif->ide_dma_off_quietly(drive);
402
        }
403
        /* IORDY not supported */
404
        return 0;
405
}
406
 
407
/**
408
 *      init_chipset_atiixp     -       set up the ATIIXP chipset
409
 *      @dev: PCI device to set up
410
 *      @name: Name of the device
411
 *
412
 *      Initialize the PCI device as required. For the ATIIXP this turns
413
 *      out to be nice and simple
414
 */
415
 
416
static unsigned int __devinit init_chipset_atiixp(struct pci_dev *dev, const char *name)
417
{
418
#if defined(DISPLAY_ATIIXP_TIMINGS) && defined(CONFIG_PROC_FS)
419
        if (!atiixp_proc) {
420
                atiixp_proc = 1;
421
                bmide_dev = dev;
422
                ide_pci_register_host_proc(&atiixp_procs);
423
        }
424
#endif /* DISPLAY_ATIIXP_TIMINGS && CONFIG_PROC_FS */
425
        return 0;
426
}
427
 
428
/**
429
 *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
430
 *      @hwif: IDE interface
431
 *
432
 *      Set up the ide_hwif_t for the ATIIXP interface according to the
433
 *      capabilities of the hardware.
434
 */
435
 
436
static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
437
{
438
        if (!hwif->irq)
439
                hwif->irq = hwif->channel ? 15 : 14;
440
 
441
        hwif->autodma = 0;
442
        hwif->tuneproc = &atiixp_tuneproc;
443
        hwif->speedproc = &atiixp_speedproc;
444
        hwif->drives[0].autotune = 1;
445
        hwif->drives[1].autotune = 1;
446
 
447
        if (!hwif->dma_base)
448
                return;
449
 
450
        hwif->atapi_dma = 1;
451
        hwif->ultra_mask = 0x3f;
452
        hwif->mwdma_mask = 0x06;
453
        hwif->swdma_mask = 0x04;
454
 
455
        /* FIXME: proper cable detection needed */
456
        hwif->udma_four = 1;
457
        hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
458
        hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
459
        hwif->ide_dma_check = &atiixp_dma_check;
460
        if (!noautodma)
461
                hwif->autodma = 1;
462
 
463
        hwif->drives[1].autodma = hwif->autodma;
464
        hwif->drives[0].autodma = hwif->autodma;
465
}
466
 
467
static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
468
        {       /* 0 */
469
                .vendor         = PCI_VENDOR_ID_ATI,
470
                .device         = PCI_DEVICE_ID_ATI_IXP_IDE,
471
                .name           = "ATIIXP",
472
                .init_chipset   = init_chipset_atiixp,
473
                .init_hwif      = init_hwif_atiixp,
474
                .channels       = 2,
475
                .autodma        = AUTODMA,
476
                .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
477
                .bootable       = ON_BOARD,
478
        }
479
};
480
 
481
/**
482
 *      atiixp_init_one -       called when a ATIIXP is found
483
 *      @dev: the atiixp device
484
 *      @id: the matching pci id
485
 *
486
 *      Called when the PCI registration layer (or the IDE initialization)
487
 *      finds a device matching our IDE device tables.
488
 */
489
 
490
static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
491
{
492
        ide_pci_device_t *d = &atiixp_pci_info[id->driver_data];
493
 
494
        if (dev->device != d->device)
495
                BUG();
496
        ide_setup_pci_device(dev, d);
497
        return 0;
498
}
499
 
500
static struct pci_device_id atiixp_pci_tbl[] = {
501
        { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
502
        { 0, },
503
};
504
 
505
static struct pci_driver driver = {
506
        .name           = "ATIIXP IDE",
507
        .id_table       = atiixp_pci_tbl,
508
        .probe          = atiixp_init_one,
509
};
510
 
511
static int atiixp_ide_init(void)
512
{
513
        return ide_pci_register_driver(&driver);
514
}
515
 
516
module_init(atiixp_ide_init);
517
 
518
MODULE_AUTHOR("HUI YU");
519
MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
520
MODULE_LICENSE("GPL");
521
 
522
EXPORT_NO_SYMBOLS;

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