summaryrefslogtreecommitdiffstats
path: root/drivers/ide/pdc202xx_old.c
blob: 8df26302a0b5bdb990f6b4745270674552fe39e2 (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
/*
 *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2006-2007		MontaVista Software, Inc.
 *  Copyright (C) 2007			Bartlomiej Zolnierkiewicz
 *
 *  Portions Copyright (C) 1999 Promise Technology, Inc.
 *  Author: Frank Tiernan (frankt@promise.com)
 *  Released under terms of General Public License
 */

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

#include <asm/io.h>

#define DRV_NAME "pdc202xx_old"

#define PDC202XX_DEBUG_DRIVE_INFO	0

static const char *pdc_quirk_drives[] = {
	"QUANTUM FIREBALLlct08 08",
	"QUANTUM FIREBALLP KA6.4",
	"QUANTUM FIREBALLP KA9.1",
	"QUANTUM FIREBALLP LM20.4",
	"QUANTUM FIREBALLP KX13.6",
	"QUANTUM FIREBALLP KX20.5",
	"QUANTUM FIREBALLP KX27.3",
	"QUANTUM FIREBALLP LM20.5",
	NULL
};

static void pdc_old_disable_66MHz_clock(ide_hwif_t *);

static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
{
	ide_hwif_t *hwif	= drive->hwif;
	struct pci_dev *dev	= to_pci_dev(hwif->dev);
	u8 drive_pci		= 0x60 + (drive->dn << 2);

	u8			AP = 0, BP = 0, CP = 0;
	u8			TA = 0, TB = 0, TC = 0;

#if PDC202XX_DEBUG_DRIVE_INFO
	u32			drive_conf = 0;
	pci_read_config_dword(dev, drive_pci, &drive_conf);
#endif

	/*
	 * TODO: do this once per channel
	 */
	if (dev->device != PCI_DEVICE_ID_PROMISE_20246)
		pdc_old_disable_66MHz_clock(hwif);

	pci_read_config_byte(dev, drive_pci,     &AP);
	pci_read_config_byte(dev, drive_pci + 1, &BP);
	pci_read_config_byte(dev, drive_pci + 2, &CP);

	switch(speed) {
		case XFER_UDMA_5:
		case XFER_UDMA_4:	TB = 0x20; TC = 0x01; break;
		case XFER_UDMA_2:	TB = 0x20; TC = 0x01; break;
		case XFER_UDMA_3:
		case XFER_UDMA_1:	TB = 0x40; TC = 0x02; break;
		case XFER_UDMA_0:
		case XFER_MW_DMA_2:	TB = 0x60; TC = 0x03; break;
		case XFER_MW_DMA_1:	TB = 0x60; TC = 0x04; break;
		case XFER_MW_DMA_0:	TB = 0xE0; TC = 0x0F; break;
		case XFER_PIO_4:	TA = 0x01; TB = 0x04; break;
		case XFER_PIO_3:	TA = 0x02; TB = 0x06; break;
		case XFER_PIO_2:	TA = 0x03; TB = 0x08; break;
		case XFER_PIO_1:	TA = 0x05; TB = 0x0C; break;
		case XFER_PIO_0:
		default:		TA = 0x09; TB = 0x13; break;
	}

	if (speed < XFER_SW_DMA_0) {
		/*
		 * preserve SYNC_INT / ERDDY_EN bits while clearing
		 * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
		 */
		AP &= ~0x3f;
		if (ata_id_iordy_disable(drive->id))
			AP |= 0x20;	/* set IORDY_EN bit */
		if (drive->media == ide_disk)
			AP |= 0x10;	/* set Prefetch_EN bit */
		/* clear PB[4:0] bits of register B */
		BP &= ~0x1f;
		pci_write_config_byte(dev, drive_pci,     AP | TA);
		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
	} else {
		/* clear MB[2:0] bits of register B */
		BP &= ~0xe0;
		/* clear MC[3:0] bits of register C */
		CP &= ~0x0f;
		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
		pci_write_config_byte(dev, drive_pci + 2, CP | TC);
	}

#if PDC202XX_DEBUG_DRIVE_INFO
	printk(KERN_DEBUG "%s: %s drive%d 0x%08x ",
		drive->name, ide_xfer_verbose(speed),
		drive->dn, drive_conf);
	pci_read_config_dword(dev, drive_pci, &drive_conf);
	printk("0x%08x\n", drive_conf);
#endif
}

static void pdc202xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
}

static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);

	pci_read_config_word(dev, 0x50, &CIS);

	return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
}

/*
 * Set the control register to use the 66MHz system
 * clock for UDMA 3/4/5 mode operation when necessary.
 *
 * FIXME: this register is shared by both channels, some locking is needed
 *
 * It may also be possible to leave the 66MHz clock on
 * and readjust the timing parameters.
 */
static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
{
	unsigned long clock_reg = hwif->extra_base + 0x01;
	u8 clock = inb(clock_reg);

	outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
}

static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
{
	unsigned long clock_reg = hwif->extra_base + 0x01;
	u8 clock = inb(clock_reg);

	outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
}

static void pdc202xx_quirkproc(ide_drive_t *drive)
{
	const char **list, *m = (char *)&drive->id[ATA_ID_PROD];

	for (list = pdc_quirk_drives; *list != NULL; list++)
		if (strstr(m, *list) != NULL) {
			drive->quirk_list = 2;
			return;
		}

	drive->quirk_list = 0;
}

static void pdc202xx_dma_start(ide_drive_t *drive)
{
	if (drive->current_speed > XFER_UDMA_2)
		pdc_old_enable_66MHz_clock(drive->hwif);
	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
		ide_hwif_t *hwif	= drive->hwif;
		struct request *rq	= hwif->rq;
		unsigned long high_16	= hwif->extra_base - 16;
		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
		u32 word_count	= 0;
		u8 clock = inb(high_16 + 0x11);

		outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
		word_count = (rq->nr_sectors << 8);
		word_count = (rq_data_dir(rq) == READ) ?
					word_count | 0x05000000 :
					word_count | 0x06000000;
		outl(word_count, atapi_reg);
	}
	ide_dma_start(drive);
}

static int pdc202xx_dma_end(ide_drive_t *drive)
{
	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
		ide_hwif_t *hwif	= drive->hwif;
		unsigned long high_16	= hwif->extra_base - 16;
		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
		u8 clock		= 0;

		outl(0, atapi_reg); /* zero out extra */
		clock = inb(high_16 + 0x11);
		outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
	}
	if (drive->current_speed > XFER_UDMA_2)
		pdc_old_disable_66MHz_clock(drive->hwif);
	return ide_dma_end(drive);
}

static int pdc202xx_dma_test_irq(ide_drive_t *drive)
{
	ide_hwif_t *hwif	= drive->hwif;
	unsigned long high_16	= hwif->extra_base - 16;
	u8 dma_stat		= inb(hwif->dma_base + ATA_DMA_STATUS);
	u8 sc1d			= inb(high_16 + 0x001d);

	if (hwif->channel) {
		/* bit7: Error, bit6: Interrupting, bit5: FIFO Full, bit4: FIFO Empty */
		if ((sc1d & 0x50) == 0x50)
			goto somebody_else;
		else if ((sc1d & 0x40) == 0x40)
			return (dma_stat & 4) == 4;
	} else {
		/* bit3: Error, bit2: Interrupting, bit1: FIFO Full, bit0: FIFO Empty */
		if ((sc1d & 0x05) == 0x05)
			goto somebody_else;
		else if ((sc1d & 0x04) == 0x04)
			return (dma_stat & 4) == 4;
	}
somebody_else:
	return (dma_stat & 4) == 4;	/* return 1 if INTR asserted */
}

static void pdc202xx_reset_host (ide_hwif_t *hwif)
{
	unsigned long high_16	= hwif->extra_base - 16;
	u8 udma_speed_flag	= inb(high_16 | 0x001f);

	outb(udma_speed_flag | 0x10, high_16 | 0x001f);
	mdelay(100);
	outb(udma_speed_flag & ~0x10, high_16 | 0x001f);
	mdelay(2000);	/* 2 seconds ?! */

	printk(KERN_WARNING "PDC202XX: %s channel reset.\n",
		hwif->channel ? "Secondary" : "Primary");
}

static void pdc202xx_reset (ide_drive_t *drive)
{
	ide_hwif_t *hwif	= drive->hwif;
	ide_hwif_t *mate	= hwif->mate;

	pdc202xx_reset_host(hwif);
	pdc202xx_reset_host(mate);

	ide_set_max_pio(drive);
}

static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
{
	pdc202xx_reset(drive);
	ide_dma_lost_irq(drive);
}

static int init_chipset_pdc202xx(struct pci_dev *dev)
{
	unsigned long dmabase = pci_resource_start(dev, 4);
	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;

	if (dmabase == 0)
		goto out;

	udma_speed_flag	= inb(dmabase | 0x1f);
	primary_mode	= inb(dmabase | 0x1a);
	secondary_mode	= inb(dmabase | 0x1b);
	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
		"Primary %s Mode " \
		"Secondary %s Mode.\n", pci_name(dev),
		(udma_speed_flag & 1) ? "EN" : "DIS",
		(primary_mode & 1) ? "MASTER" : "PCI",
		(secondary_mode & 1) ? "MASTER" : "PCI" );

	if (!(udma_speed_flag & 1)) {
		printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
			pci_name(dev), udma_speed_flag,
			(udma_speed_flag|1));
		outb(udma_speed_flag | 1, dmabase | 0x1f);
		printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
	}
out:
	return 0;
}

static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev,
					   const char *name)
{
	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
		u8 irq = 0, irq2 = 0;
		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
		/* 0xbc */
		pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
		if (irq != irq2) {
			pci_write_config_byte(dev,
				(PCI_INTERRUPT_LINE)|0x80, irq);     /* 0xbc */
			printk(KERN_INFO "%s %s: PCI config space interrupt "
				"mirror fixed\n", name, pci_name(dev));
		}
	}
}

#define IDE_HFLAGS_PDC202XX \
	(IDE_HFLAG_ERROR_STOPS_FIFO | \
	 IDE_HFLAG_OFF_BOARD)

static const struct ide_port_ops pdc20246_port_ops = {
	.set_pio_mode		= pdc202xx_set_pio_mode,
	.set_dma_mode		= pdc202xx_set_mode,
	.quirkproc		= pdc202xx_quirkproc,
};

static const struct ide_port_ops pdc2026x_port_ops = {
	.set_pio_mode		= pdc202xx_set_pio_mode,
	.set_dma_mode		= pdc202xx_set_mode,
	.quirkproc		= pdc202xx_quirkproc,
	.resetproc		= pdc202xx_reset,
	.cable_detect		= pdc2026x_cable_detect,
};

static const struct ide_dma_ops pdc20246_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		= pdc202xx_dma_test_irq,
	.dma_lost_irq		= ide_dma_lost_irq,
	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
	.dma_sff_read_status	= ide_dma_sff_read_status,
};

static const struct ide_dma_ops pdc2026x_dma_ops = {
	.dma_host_set		= ide_dma_host_set,
	.dma_setup		= ide_dma_setup,
	.dma_start		= pdc202xx_dma_start,
	.dma_end		= pdc202xx_dma_end,
	.dma_test_irq		= pdc202xx_dma_test_irq,
	.dma_lost_irq		= pdc202xx_dma_lost_irq,
	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
	.dma_clear		= pdc202xx_reset,
	.dma_sff_read_status	= ide_dma_sff_read_status,
};

#define DECLARE_PDC2026X_DEV(udma, sectors) \
	{ \
		.name		= DRV_NAME, \
		.init_chipset	= init_chipset_pdc202xx, \
		.port_ops	= &pdc2026x_port_ops, \
		.dma_ops	= &pdc2026x_dma_ops, \
		.host_flags	= IDE_HFLAGS_PDC202XX, \
		.pio_mask	= ATA_PIO4, \
		.mwdma_mask	= ATA_MWDMA2, \
		.udma_mask	= udma, \
		.max_sectors	= sectors, \
	}

static const struct ide_port_info pdc202xx_chipsets[] __devinitdata = {
	{	/* 0: PDC20246 */
		.name		= DRV_NAME,
		.init_chipset	= init_chipset_pdc202xx,
		.port_ops	= &pdc20246_port_ops,
		.dma_ops	= &pdc20246_dma_ops,
		.host_flags	= IDE_HFLAGS_PDC202XX,
		.pio_mask	= ATA_PIO4,
		.mwdma_mask	= ATA_MWDMA2,
		.udma_mask	= ATA_UDMA2,
	},

	/* 1: PDC2026{2,3} */
	DECLARE_PDC2026X_DEV(ATA_UDMA4, 0),
	/* 2: PDC2026{5,7}: UDMA5, limit LBA48 requests to 256 sectors */
	DECLARE_PDC2026X_DEV(ATA_UDMA5, 256),
};

/**
 *	pdc202xx_init_one	-	called when a PDC202xx is found
 *	@dev: the pdc202xx device
 *	@id: the matching pci id
 *
 *	Called when the PCI registration layer (or the IDE initialization)
 *	finds a device matching our IDE device tables.
 */
 
static int __devinit pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	const struct ide_port_info *d;
	u8 idx = id->driver_data;

	d = &pdc202xx_chipsets[idx];

	if (idx < 2)
		pdc202ata4_fixup_irq(dev, d->name);

	if (dev->vendor == PCI_DEVICE_ID_PROMISE_20265) {
		struct pci_dev *bridge = dev->bus->self;

		if (bridge &&
		    bridge->vendor == PCI_VENDOR_ID_INTEL &&
		    (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
		     bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
			printk(KERN_INFO DRV_NAME " %s: skipping Promise "
				"PDC20265 attached to I2O RAID controller\n",
				pci_name(dev));
			return -ENODEV;
		}
	}

	return ide_pci_init_one(dev, d, NULL);
}

static const struct pci_device_id pdc202xx_pci_tbl[] = {
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);

static struct pci_driver pdc202xx_pci_driver = {
	.name		= "Promise_Old_IDE",
	.id_table	= pdc202xx_pci_tbl,
	.probe		= pdc202xx_init_one,
	.remove		= ide_pci_remove,
	.suspend	= ide_pci_suspend,
	.resume		= ide_pci_resume,
};

static int __init pdc202xx_ide_init(void)
{
	return ide_pci_register_driver(&pdc202xx_pci_driver);
}

static void __exit pdc202xx_ide_exit(void)
{
	pci_unregister_driver(&pdc202xx_pci_driver);
}

module_init(pdc202xx_ide_init);
module_exit(pdc202xx_ide_exit);

MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
MODULE_LICENSE("GPL");