aboutsummaryrefslogtreecommitdiff
path: root/drivers/ide/alim15x3.c
blob: 911a27ca356b71b406d4ff0eae80e7d4d5b51abf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
/*
 *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
 *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
 *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
 *
 *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
 *  May be copied or modified under the terms of the GNU General Public License
 *  Copyright (C) 2002 Alan Cox
 *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
 *  Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
 *  Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
 *
 *  (U)DMA capable version of ali 1533/1543(C), 1535(D)
 *
 **********************************************************************
 *  9/7/99 --Parts from the above author are included and need to be
 *  converted into standard interface, once I finish the thought.
 *
 *  Recent changes
 *	Don't use LBA48 mode on ALi <= 0xC4
 *	Don't poke 0x79 with a non ALi northbridge
 *	Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
 *	Allow UDMA6 on revisions > 0xC4
 *
 *  Documentation
 *	Chipset documentation available under NDA only
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <linux/dmi.h>

#include <asm/io.h>

#define DRV_NAME "alim15x3"

/*
 *	ALi devices are not plug in. Otherwise these static values would
 *	need to go. They ought to go away anyway
 */
 
static u8 m5229_revision;
static u8 chip_is_1543c_e;
static struct pci_dev *isa_dev;

static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
{
	struct pci_dev *pdev = to_pci_dev(hwif->dev);
	int pio_fifo = 0x54 + hwif->channel;
	u8 fifo;
	int shift = 4 * (drive->dn & 1);

	pci_read_config_byte(pdev, pio_fifo, &fifo);
	fifo &= ~(0x0F << shift);
	fifo |= (on << shift);
	pci_write_config_byte(pdev, pio_fifo, fifo);
}

static void ali_program_timings(ide_hwif_t *hwif, ide_drive_t *drive,
				struct ide_timing *t, u8 ultra)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	int port = hwif->channel ? 0x5c : 0x58;
	int udmat = 0x56 + hwif->channel;
	u8 unit = drive->dn & 1, udma;
	int shift = 4 * unit;

	/* Set up the UDMA */
	pci_read_config_byte(dev, udmat, &udma);
	udma &= ~(0x0F << shift);
	udma |= ultra << shift;
	pci_write_config_byte(dev, udmat, udma);

	if (t == NULL)
		return;

	t->setup = clamp_val(t->setup, 1, 8) & 7;
	t->act8b = clamp_val(t->act8b, 1, 8) & 7;
	t->rec8b = clamp_val(t->rec8b, 1, 16) & 15;
	t->active = clamp_val(t->active, 1, 8) & 7;
	t->recover = clamp_val(t->recover, 1, 16) & 15;

	pci_write_config_byte(dev, port, t->setup);
	pci_write_config_byte(dev, port + 1, (t->act8b << 4) | t->rec8b);
	pci_write_config_byte(dev, port + unit + 2,
			      (t->active << 4) | t->recover);
}

/**
 *	ali_set_pio_mode	-	set host controller for PIO mode
 *	@hwif: port
 *	@drive: drive
 *
 *	Program the controller for the given PIO mode.
 */

static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
	ide_drive_t *pair = ide_get_pair_dev(drive);
	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
	unsigned long T =  1000000 / bus_speed; /* PCI clock based */
	struct ide_timing t;

	ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
	if (pair) {
		struct ide_timing p;

		ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
		ide_timing_merge(&p, &t, &t,
			IDE_TIMING_SETUP | IDE_TIMING_8BIT);
		if (pair->dma_mode) {
			ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
			ide_timing_merge(&p, &t, &t,
				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
		}
	}

	/* 
	 * PIO mode => ATA FIFO on, ATAPI FIFO off
	 */
	ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);

	ali_program_timings(hwif, drive, &t, 0);
}

/**
 *	ali_udma_filter		-	compute UDMA mask
 *	@drive: IDE device
 *
 *	Return available UDMA modes.
 *
 *	The actual rules for the ALi are:
 *		No UDMA on revisions <= 0x20
 *		Disk only for revisions < 0xC2
 *		Not WDC drives on M1543C-E (?)
 */

static u8 ali_udma_filter(ide_drive_t *drive)
{
	if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
		if (drive->media != ide_disk)
			return 0;
		if (chip_is_1543c_e &&
		    strstr((char *)&drive->id[ATA_ID_PROD], "WDC "))
			return 0;
	}

	return drive->hwif->ultra_mask;
}

/**
 *	ali_set_dma_mode	-	set host controller for DMA mode
 *	@hwif: port
 *	@drive: drive
 *
 *	Configure the hardware for the desired IDE transfer mode.
 */

static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
	static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
	struct pci_dev *dev	= to_pci_dev(hwif->dev);
	ide_drive_t *pair	= ide_get_pair_dev(drive);
	int bus_speed		= ide_pci_clk ? ide_pci_clk : 33;
	unsigned long T		=  1000000 / bus_speed; /* PCI clock based */
	const u8 speed		= drive->dma_mode;
	u8 tmpbyte		= 0x00;
	struct ide_timing t;

	if (speed < XFER_UDMA_0) {
		ide_timing_compute(drive, drive->dma_mode, &t, T, 1);
		if (pair) {
			struct ide_timing p;

			ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
			ide_timing_merge(&p, &t, &t,
				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
			if (pair->dma_mode) {
				ide_timing_compute(pair, pair->dma_mode,
						&p, T, 1);
				ide_timing_merge(&p, &t, &t,
					IDE_TIMING_SETUP | IDE_TIMING_8BIT);
			}
		}
		ali_program_timings(hwif, drive, &t, 0);
	} else {
		ali_program_timings(hwif, drive, NULL,
				udma_timing[speed - XFER_UDMA_0]);
		if (speed >= XFER_UDMA_3) {
			pci_read_config_byte(dev, 0x4b, &tmpbyte);
			tmpbyte |= 1;
			pci_write_config_byte(dev, 0x4b, tmpbyte);
		}
	}
}

/**
 *	ali_dma_check	-	DMA check
 *	@drive:	target device
 *	@cmd: command
 *
 *	Returns 1 if the DMA cannot be performed, zero on success.
 */

static int ali_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
{
	if (m5229_revision < 0xC2 && drive->media != ide_disk) {
		if (cmd->tf_flags & IDE_TFLAG_WRITE)
			return 1;	/* try PIO instead of DMA */
	}
	return 0;
}

/**
 *	init_chipset_ali15x3	-	Initialise an ALi IDE controller
 *	@dev: PCI device
 *
 *	This function initializes the ALI IDE controller and where 
 *	appropriate also sets up the 1533 southbridge.
 */

static int init_chipset_ali15x3(struct pci_dev *dev)
{
	unsigned long flags;
	u8 tmpbyte;
	struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));

	m5229_revision = dev->revision;

	isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);

	local_irq_save(flags);

	if (m5229_revision < 0xC2) {
		/*
		 * revision 0x20 (1543-E, 1543-F)
		 * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
		 * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
		 */
		pci_read_config_byte(dev, 0x4b, &tmpbyte);
		/*
		 * clear bit 7
		 */
		pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
		/*
		 * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
		 */
		if (m5229_revision >= 0x20 && isa_dev) {
			pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
			chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
		}
		goto out;
	}

	/*
	 * 1543C-B?, 1535, 1535D, 1553
	 * Note 1: not all "motherboard" support this detection
	 * Note 2: if no udma 66 device, the detection may "error".
	 *         but in this case, we will not set the device to
	 *         ultra 66, the detection result is not important
	 */

	/*
	 * enable "Cable Detection", m5229, 0x4b, bit3
	 */
	pci_read_config_byte(dev, 0x4b, &tmpbyte);
	pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);

	/*
	 * We should only tune the 1533 enable if we are using an ALi
	 * North bridge. We might have no north found on some zany
	 * box without a device at 0:0.0. The ALi bridge will be at
	 * 0:0.0 so if we didn't find one we know what is cooking.
	 */
	if (north && north->vendor != PCI_VENDOR_ID_AL)
		goto out;

	if (m5229_revision < 0xC5 && isa_dev)
	{	
		/*
		 * set south-bridge's enable bit, m1533, 0x79
		 */

		pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
		if (m5229_revision == 0xC2) {
			/*
			 * 1543C-B0 (m1533, 0x79, bit 2)
			 */
			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
		} else if (m5229_revision >= 0xC3) {
			/*
			 * 1553/1535 (m1533, 0x79, bit 1)
			 */
			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
		}
	}

out:
	/*
	 * CD_ROM DMA on (m5229, 0x53, bit0)
	 *      Enable this bit even if we want to use PIO.
	 * PIO FIFO off (m5229, 0x53, bit1)
	 *      The hardware will use 0x54h and 0x55h to control PIO FIFO.
	 *	(Not on later devices it seems)
	 *
	 *	0x53 changes meaning on later revs - we must no touch
	 *	bit 1 on them.  Need to check if 0x20 is the right break.
	 */
	if (m5229_revision >= 0x20) {
		pci_read_config_byte(dev, 0x53, &tmpbyte);

		if (m5229_revision <= 0x20)
			tmpbyte = (tmpbyte & (~0x02)) | 0x01;
		else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
			tmpbyte |= 0x03;
		else
			tmpbyte |= 0x01;

		pci_write_config_byte(dev, 0x53, tmpbyte);
	}
	pci_dev_put(north);
	pci_dev_put(isa_dev);
	local_irq_restore(flags);
	return 0;
}

/*
 *	Cable special cases
 */

static const struct dmi_system_id cable_dmi_table[] = {
	{
		.ident = "HP Pavilion N5430",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
		},
	},
	{
		.ident = "Toshiba Satellite S1800-814",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
			DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
		},
	},
	{ }
};

static int ali_cable_override(struct pci_dev *pdev)
{
	/* Fujitsu P2000 */
	if (pdev->subsystem_vendor == 0x10CF &&
	    pdev->subsystem_device == 0x10AF)
		return 1;

	/* Mitac 8317 (Winbook-A) and relatives */
	if (pdev->subsystem_vendor == 0x1071 &&
	    pdev->subsystem_device == 0x8317)
		return 1;

	/* Systems by DMI */
	if (dmi_check_system(cable_dmi_table))
		return 1;

	return 0;
}

/**
 *	ali_cable_detect	-	cable detection
 *	@hwif: IDE interface
 *
 *	This checks if the controller and the cable are capable
 *	of UDMA66 transfers. It doesn't check the drives.
 */

static u8 ali_cable_detect(ide_hwif_t *hwif)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u8 cbl = ATA_CBL_PATA40, tmpbyte;

	if (m5229_revision >= 0xC2) {
		/*
		 * m5229 80-pin cable detection (from Host View)
		 *
		 * 0x4a bit0 is 0 => primary channel has 80-pin
		 * 0x4a bit1 is 0 => secondary channel has 80-pin
		 *
		 * Certain laptops use short but suitable cables
		 * and don't implement the detect logic.
		 */
		if (ali_cable_override(dev))
			cbl = ATA_CBL_PATA40_SHORT;
		else {
			pci_read_config_byte(dev, 0x4a, &tmpbyte);
			if ((tmpbyte & (1 << hwif->channel)) == 0)
				cbl = ATA_CBL_PATA80;
		}
	}

	return cbl;
}

#ifndef CONFIG_SPARC64
/**
 *	init_hwif_ali15x3	-	Initialize the ALI IDE x86 stuff
 *	@hwif: interface to configure
 *
 *	Obtain the IRQ tables for an ALi based IDE solution on the PC
 *	class platforms. This part of the code isn't applicable to the
 *	Sparc systems.
 */

static void __devinit init_hwif_ali15x3 (ide_hwif_t *hwif)
{
	u8 ideic, inmir;
	s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
				      1, 11, 0, 12, 0, 14, 0, 15 };
	int irq = -1;

	if (isa_dev) {
		/*
		 * read IDE interface control
		 */
		pci_read_config_byte(isa_dev, 0x58, &ideic);

		/* bit0, bit1 */
		ideic = ideic & 0x03;

		/* get IRQ for IDE Controller */
		if ((hwif->channel && ideic == 0x03) ||
		    (!hwif->channel && !ideic)) {
			/*
			 * get SIRQ1 routing table
			 */
			pci_read_config_byte(isa_dev, 0x44, &inmir);
			inmir = inmir & 0x0f;
			irq = irq_routing_table[inmir];
		} else if (hwif->channel && !(ideic & 0x01)) {
			/*
			 * get SIRQ2 routing table
			 */
			pci_read_config_byte(isa_dev, 0x75, &inmir);
			inmir = inmir & 0x0f;
			irq = irq_routing_table[inmir];
		}
		if(irq >= 0)
			hwif->irq = irq;
	}
}
#else
#define init_hwif_ali15x3 NULL
#endif /* CONFIG_SPARC64 */

/**
 *	init_dma_ali15x3	-	set up DMA on ALi15x3
 *	@hwif: IDE interface
 *	@d: IDE port info
 *
 *	Set up the DMA functionality on the ALi 15x3.
 */

static int __devinit init_dma_ali15x3(ide_hwif_t *hwif,
				      const struct ide_port_info *d)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	unsigned long base = ide_pci_dma_base(hwif, d);

	if (base == 0)
		return -1;

	hwif->dma_base = base;

	if (ide_pci_check_simplex(hwif, d) < 0)
		return -1;

	if (ide_pci_set_master(dev, d->name) < 0)
		return -1;

	if (!hwif->channel)
		outb(inb(base + 2) & 0x60, base + 2);

	printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
			 hwif->name, base, base + 7);

	if (ide_allocate_dma_engine(hwif))
		return -1;

	return 0;
}

static const struct ide_port_ops ali_port_ops = {
	.set_pio_mode		= ali_set_pio_mode,
	.set_dma_mode		= ali_set_dma_mode,
	.udma_filter		= ali_udma_filter,
	.cable_detect		= ali_cable_detect,
};

static const struct ide_dma_ops ali_dma_ops = {
	.dma_host_set		= ide_dma_host_set,
	.dma_setup		= ide_dma_setup,
	.dma_start		= ide_dma_start,
	.dma_end		= ide_dma_end,
	.dma_test_irq		= ide_dma_test_irq,
	.dma_lost_irq		= ide_dma_lost_irq,
	.dma_check		= ali_dma_check,
	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
	.dma_sff_read_status	= ide_dma_sff_read_status,
};

static const struct ide_port_info ali15x3_chipset __devinitconst = {
	.name		= DRV_NAME,
	.init_chipset	= init_chipset_ali15x3,
	.init_hwif	= init_hwif_ali15x3,
	.init_dma	= init_dma_ali15x3,
	.port_ops	= &ali_port_ops,
	.dma_ops	= &sff_dma_ops,
	.pio_mask	= ATA_PIO5,
	.swdma_mask	= ATA_SWDMA2,
	.mwdma_mask	= ATA_MWDMA2,
};

/**
 *	alim15x3_init_one	-	set up an ALi15x3 IDE controller
 *	@dev: PCI device to set up
 *
 *	Perform the actual set up for an ALi15x3 that has been found by the
 *	hot plug layer.
 */
 
static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	struct ide_port_info d = ali15x3_chipset;
	u8 rev = dev->revision, idx = id->driver_data;

	/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
	if (rev <= 0xC4)
		d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;

	if (rev >= 0x20) {
		if (rev == 0x20)
			d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;

		if (rev < 0xC2)
			d.udma_mask = ATA_UDMA2;
		else if (rev == 0xC2 || rev == 0xC3)
			d.udma_mask = ATA_UDMA4;
		else if (rev == 0xC4)
			d.udma_mask = ATA_UDMA5;
		else
			d.udma_mask = ATA_UDMA6;

		d.dma_ops = &ali_dma_ops;
	} else {
		d.host_flags |= IDE_HFLAG_NO_DMA;

		d.mwdma_mask = d.swdma_mask = 0;
	}

	if (idx == 0)
		d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;

	return ide_pci_init_one(dev, &d, NULL);
}


static const struct pci_device_id alim15x3_pci_tbl[] = {
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);

static struct pci_driver alim15x3_pci_driver = {
	.name		= "ALI15x3_IDE",
	.id_table	= alim15x3_pci_tbl,
	.probe		= alim15x3_init_one,
	.remove		= ide_pci_remove,
	.suspend	= ide_pci_suspend,
	.resume		= ide_pci_resume,
};

static int __init ali15x3_ide_init(void)
{
	return ide_pci_register_driver(&alim15x3_pci_driver);
}

static void __exit ali15x3_ide_exit(void)
{
	pci_unregister_driver(&alim15x3_pci_driver);
}

module_init(ali15x3_ide_init);
module_exit(ali15x3_ide_exit);

MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox, Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
MODULE_LICENSE("GPL");