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1 /*
2  *  linux/drivers/ide/pci/pdc202xx_old.c        Version 0.50    Mar 3, 2007
3  *
4  *  Copyright (C) 1998-2002             Andre Hedrick <andre@linux-ide.org>
5  *  Copyright (C) 2006-2007             MontaVista Software, Inc.
6  *  Copyright (C) 2007                  Bartlomiej Zolnierkiewicz
7  *
8  *  Promise Ultra33 cards with BIOS v1.20 through 1.28 will need this
9  *  compiled into the kernel if you have more than one card installed.
10  *  Note that BIOS v1.29 is reported to fix the problem.  Since this is
11  *  safe chipset tuning, including this support is harmless
12  *
13  *  Promise Ultra66 cards with BIOS v1.11 this
14  *  compiled into the kernel if you have more than one card installed.
15  *
16  *  Promise Ultra100 cards.
17  *
18  *  The latest chipset code will support the following ::
19  *  Three Ultra33 controllers and 12 drives.
20  *  8 are UDMA supported and 4 are limited to DMA mode 2 multi-word.
21  *  The 8/4 ratio is a BIOS code limit by promise.
22  *
23  *  UNLESS you enable "CONFIG_PDC202XX_BURST"
24  *
25  */
26
27 /*
28  *  Portions Copyright (C) 1999 Promise Technology, Inc.
29  *  Author: Frank Tiernan (frankt@promise.com)
30  *  Released under terms of General Public License
31  */
32
33 #include <linux/types.h>
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/delay.h>
37 #include <linux/timer.h>
38 #include <linux/mm.h>
39 #include <linux/ioport.h>
40 #include <linux/blkdev.h>
41 #include <linux/hdreg.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/init.h>
45 #include <linux/ide.h>
46
47 #include <asm/io.h>
48 #include <asm/irq.h>
49
50 #define PDC202XX_DEBUG_DRIVE_INFO       0
51
52 static const char *pdc_quirk_drives[] = {
53         "QUANTUM FIREBALLlct08 08",
54         "QUANTUM FIREBALLP KA6.4",
55         "QUANTUM FIREBALLP KA9.1",
56         "QUANTUM FIREBALLP LM20.4",
57         "QUANTUM FIREBALLP KX13.6",
58         "QUANTUM FIREBALLP KX20.5",
59         "QUANTUM FIREBALLP KX27.3",
60         "QUANTUM FIREBALLP LM20.5",
61         NULL
62 };
63
64 static void pdc_old_disable_66MHz_clock(ide_hwif_t *);
65
66 static int pdc202xx_tune_chipset (ide_drive_t *drive, u8 xferspeed)
67 {
68         ide_hwif_t *hwif        = HWIF(drive);
69         struct pci_dev *dev     = hwif->pci_dev;
70         u8 drive_pci            = 0x60 + (drive->dn << 2);
71         u8 speed                = ide_rate_filter(drive, xferspeed);
72
73         u8                      AP = 0, BP = 0, CP = 0;
74         u8                      TA = 0, TB = 0, TC = 0;
75
76 #if PDC202XX_DEBUG_DRIVE_INFO
77         u32                     drive_conf = 0;
78         pci_read_config_dword(dev, drive_pci, &drive_conf);
79 #endif
80
81         /*
82          * TODO: do this once per channel
83          */
84         if (dev->device != PCI_DEVICE_ID_PROMISE_20246)
85                 pdc_old_disable_66MHz_clock(hwif);
86
87         pci_read_config_byte(dev, drive_pci,     &AP);
88         pci_read_config_byte(dev, drive_pci + 1, &BP);
89         pci_read_config_byte(dev, drive_pci + 2, &CP);
90
91         switch(speed) {
92                 case XFER_UDMA_5:
93                 case XFER_UDMA_4:       TB = 0x20; TC = 0x01; break;
94                 case XFER_UDMA_2:       TB = 0x20; TC = 0x01; break;
95                 case XFER_UDMA_3:
96                 case XFER_UDMA_1:       TB = 0x40; TC = 0x02; break;
97                 case XFER_UDMA_0:
98                 case XFER_MW_DMA_2:     TB = 0x60; TC = 0x03; break;
99                 case XFER_MW_DMA_1:     TB = 0x60; TC = 0x04; break;
100                 case XFER_MW_DMA_0:     TB = 0xE0; TC = 0x0F; break;
101                 case XFER_SW_DMA_2:     TB = 0x60; TC = 0x05; break;
102                 case XFER_SW_DMA_1:     TB = 0x80; TC = 0x06; break;
103                 case XFER_SW_DMA_0:     TB = 0xC0; TC = 0x0B; break;
104                 case XFER_PIO_4:        TA = 0x01; TB = 0x04; break;
105                 case XFER_PIO_3:        TA = 0x02; TB = 0x06; break;
106                 case XFER_PIO_2:        TA = 0x03; TB = 0x08; break;
107                 case XFER_PIO_1:        TA = 0x05; TB = 0x0C; break;
108                 case XFER_PIO_0:
109                 default:                TA = 0x09; TB = 0x13; break;
110         }
111
112         if (speed < XFER_SW_DMA_0) {
113                 /*
114                  * preserve SYNC_INT / ERDDY_EN bits while clearing
115                  * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
116                  */
117                 AP &= ~0x3f;
118                 if (drive->id->capability & 4)
119                         AP |= 0x20;     /* set IORDY_EN bit */
120                 if (drive->media == ide_disk)
121                         AP |= 0x10;     /* set Prefetch_EN bit */
122                 /* clear PB[4:0] bits of register B */
123                 BP &= ~0x1f;
124                 pci_write_config_byte(dev, drive_pci,     AP | TA);
125                 pci_write_config_byte(dev, drive_pci + 1, BP | TB);
126         } else {
127                 /* clear MB[2:0] bits of register B */
128                 BP &= ~0xe0;
129                 /* clear MC[3:0] bits of register C */
130                 CP &= ~0x0f;
131                 pci_write_config_byte(dev, drive_pci + 1, BP | TB);
132                 pci_write_config_byte(dev, drive_pci + 2, CP | TC);
133         }
134
135 #if PDC202XX_DEBUG_DRIVE_INFO
136         printk(KERN_DEBUG "%s: %s drive%d 0x%08x ",
137                 drive->name, ide_xfer_verbose(speed),
138                 drive->dn, drive_conf);
139         pci_read_config_dword(dev, drive_pci, &drive_conf);
140         printk("0x%08x\n", drive_conf);
141 #endif
142
143         return ide_config_drive_speed(drive, speed);
144 }
145
146 static void pdc202xx_tune_drive(ide_drive_t *drive, u8 pio)
147 {
148         pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
149         pdc202xx_tune_chipset(drive, XFER_PIO_0 + pio);
150 }
151
152 static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
153 {
154         u16 CIS = 0, mask = (hwif->channel) ? (1<<11) : (1<<10);
155         pci_read_config_word(hwif->pci_dev, 0x50, &CIS);
156         return (CIS & mask) ? 1 : 0;
157 }
158
159 /*
160  * Set the control register to use the 66MHz system
161  * clock for UDMA 3/4/5 mode operation when necessary.
162  *
163  * FIXME: this register is shared by both channels, some locking is needed
164  *
165  * It may also be possible to leave the 66MHz clock on
166  * and readjust the timing parameters.
167  */
168 static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
169 {
170         unsigned long clock_reg = hwif->dma_master + 0x11;
171         u8 clock = inb(clock_reg);
172
173         outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
174 }
175
176 static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
177 {
178         unsigned long clock_reg = hwif->dma_master + 0x11;
179         u8 clock = inb(clock_reg);
180
181         outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
182 }
183
184 static int pdc202xx_config_drive_xfer_rate (ide_drive_t *drive)
185 {
186         drive->init_speed = 0;
187
188         if (ide_tune_dma(drive))
189                 return 0;
190
191         if (ide_use_fast_pio(drive))
192                 pdc202xx_tune_drive(drive, 255);
193
194         return -1;
195 }
196
197 static int pdc202xx_quirkproc (ide_drive_t *drive)
198 {
199         const char **list, *model = drive->id->model;
200
201         for (list = pdc_quirk_drives; *list != NULL; list++)
202                 if (strstr(model, *list) != NULL)
203                         return 2;
204         return 0;
205 }
206
207 static void pdc202xx_old_ide_dma_start(ide_drive_t *drive)
208 {
209         if (drive->current_speed > XFER_UDMA_2)
210                 pdc_old_enable_66MHz_clock(drive->hwif);
211         if (drive->media != ide_disk || drive->addressing == 1) {
212                 struct request *rq      = HWGROUP(drive)->rq;
213                 ide_hwif_t *hwif        = HWIF(drive);
214                 unsigned long high_16   = hwif->dma_master;
215                 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
216                 u32 word_count  = 0;
217                 u8 clock = inb(high_16 + 0x11);
218
219                 outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
220                 word_count = (rq->nr_sectors << 8);
221                 word_count = (rq_data_dir(rq) == READ) ?
222                                         word_count | 0x05000000 :
223                                         word_count | 0x06000000;
224                 outl(word_count, atapi_reg);
225         }
226         ide_dma_start(drive);
227 }
228
229 static int pdc202xx_old_ide_dma_end(ide_drive_t *drive)
230 {
231         if (drive->media != ide_disk || drive->addressing == 1) {
232                 ide_hwif_t *hwif        = HWIF(drive);
233                 unsigned long high_16   = hwif->dma_master;
234                 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
235                 u8 clock                = 0;
236
237                 outl(0, atapi_reg); /* zero out extra */
238                 clock = inb(high_16 + 0x11);
239                 outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
240         }
241         if (drive->current_speed > XFER_UDMA_2)
242                 pdc_old_disable_66MHz_clock(drive->hwif);
243         return __ide_dma_end(drive);
244 }
245
246 static int pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive)
247 {
248         ide_hwif_t *hwif        = HWIF(drive);
249         unsigned long high_16   = hwif->dma_master;
250         u8 dma_stat             = inb(hwif->dma_status);
251         u8 sc1d                 = inb(high_16 + 0x001d);
252
253         if (hwif->channel) {
254                 /* bit7: Error, bit6: Interrupting, bit5: FIFO Full, bit4: FIFO Empty */
255                 if ((sc1d & 0x50) == 0x50)
256                         goto somebody_else;
257                 else if ((sc1d & 0x40) == 0x40)
258                         return (dma_stat & 4) == 4;
259         } else {
260                 /* bit3: Error, bit2: Interrupting, bit1: FIFO Full, bit0: FIFO Empty */
261                 if ((sc1d & 0x05) == 0x05)
262                         goto somebody_else;
263                 else if ((sc1d & 0x04) == 0x04)
264                         return (dma_stat & 4) == 4;
265         }
266 somebody_else:
267         return (dma_stat & 4) == 4;     /* return 1 if INTR asserted */
268 }
269
270 static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
271 {
272         ide_hwif_t *hwif = HWIF(drive);
273
274         if (hwif->resetproc != NULL)
275                 hwif->resetproc(drive);
276
277         ide_dma_lost_irq(drive);
278 }
279
280 static int pdc202xx_ide_dma_timeout(ide_drive_t *drive)
281 {
282         if (HWIF(drive)->resetproc != NULL)
283                 HWIF(drive)->resetproc(drive);
284         return __ide_dma_timeout(drive);
285 }
286
287 static void pdc202xx_reset_host (ide_hwif_t *hwif)
288 {
289         unsigned long high_16   = hwif->dma_master;
290         u8 udma_speed_flag      = inb(high_16 | 0x001f);
291
292         outb(udma_speed_flag | 0x10, high_16 | 0x001f);
293         mdelay(100);
294         outb(udma_speed_flag & ~0x10, high_16 | 0x001f);
295         mdelay(2000);   /* 2 seconds ?! */
296
297         printk(KERN_WARNING "PDC202XX: %s channel reset.\n",
298                 hwif->channel ? "Secondary" : "Primary");
299 }
300
301 static void pdc202xx_reset (ide_drive_t *drive)
302 {
303         ide_hwif_t *hwif        = HWIF(drive);
304         ide_hwif_t *mate        = hwif->mate;
305         
306         pdc202xx_reset_host(hwif);
307         pdc202xx_reset_host(mate);
308         pdc202xx_tune_drive(drive, 255);
309 }
310
311 static unsigned int __devinit init_chipset_pdc202xx(struct pci_dev *dev,
312                                                         const char *name)
313 {
314         /* This doesn't appear needed */
315         if (dev->resource[PCI_ROM_RESOURCE].start) {
316                 pci_write_config_dword(dev, PCI_ROM_ADDRESS,
317                         dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE);
318                 printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name,
319                         (unsigned long)dev->resource[PCI_ROM_RESOURCE].start);
320         }
321
322         return dev->irq;
323 }
324
325 static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
326 {
327         struct pci_dev *dev = hwif->pci_dev;
328
329         /* PDC20265 has problems with large LBA48 requests */
330         if ((dev->device == PCI_DEVICE_ID_PROMISE_20267) ||
331             (dev->device == PCI_DEVICE_ID_PROMISE_20265))
332                 hwif->rqsize = 256;
333
334         hwif->autodma = 0;
335         hwif->tuneproc  = &pdc202xx_tune_drive;
336         hwif->quirkproc = &pdc202xx_quirkproc;
337
338         if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246)
339                 hwif->resetproc = &pdc202xx_reset;
340
341         hwif->speedproc = &pdc202xx_tune_chipset;
342
343         hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
344
345         hwif->ultra_mask = hwif->cds->udma_mask;
346         hwif->mwdma_mask = 0x07;
347         hwif->swdma_mask = 0x07;
348         hwif->atapi_dma = 1;
349
350         hwif->err_stops_fifo = 1;
351
352         hwif->ide_dma_check = &pdc202xx_config_drive_xfer_rate;
353         hwif->dma_lost_irq = &pdc202xx_dma_lost_irq;
354         hwif->ide_dma_timeout = &pdc202xx_ide_dma_timeout;
355
356         if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246) {
357                 if (!(hwif->udma_four))
358                         hwif->udma_four = (pdc202xx_old_cable_detect(hwif)) ? 0 : 1;
359                 hwif->dma_start = &pdc202xx_old_ide_dma_start;
360                 hwif->ide_dma_end = &pdc202xx_old_ide_dma_end;
361         } 
362         hwif->ide_dma_test_irq = &pdc202xx_old_ide_dma_test_irq;
363
364         if (!noautodma)
365                 hwif->autodma = 1;
366         hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
367 }
368
369 static void __devinit init_dma_pdc202xx(ide_hwif_t *hwif, unsigned long dmabase)
370 {
371         u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;
372
373         if (hwif->channel) {
374                 ide_setup_dma(hwif, dmabase, 8);
375                 return;
376         }
377
378         udma_speed_flag = inb(dmabase | 0x1f);
379         primary_mode    = inb(dmabase | 0x1a);
380         secondary_mode  = inb(dmabase | 0x1b);
381         printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
382                 "Primary %s Mode " \
383                 "Secondary %s Mode.\n", hwif->cds->name,
384                 (udma_speed_flag & 1) ? "EN" : "DIS",
385                 (primary_mode & 1) ? "MASTER" : "PCI",
386                 (secondary_mode & 1) ? "MASTER" : "PCI" );
387
388 #ifdef CONFIG_PDC202XX_BURST
389         if (!(udma_speed_flag & 1)) {
390                 printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
391                         hwif->cds->name, udma_speed_flag,
392                         (udma_speed_flag|1));
393                 outb(udma_speed_flag | 1, dmabase | 0x1f);
394                 printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
395         }
396 #endif /* CONFIG_PDC202XX_BURST */
397
398         ide_setup_dma(hwif, dmabase, 8);
399 }
400
401 static int __devinit init_setup_pdc202ata4(struct pci_dev *dev,
402                                            ide_pci_device_t *d)
403 {
404         if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
405                 u8 irq = 0, irq2 = 0;
406                 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
407                 /* 0xbc */
408                 pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
409                 if (irq != irq2) {
410                         pci_write_config_byte(dev,
411                                 (PCI_INTERRUPT_LINE)|0x80, irq);     /* 0xbc */
412                         printk(KERN_INFO "%s: pci-config space interrupt "
413                                 "mirror fixed.\n", d->name);
414                 }
415         }
416         return ide_setup_pci_device(dev, d);
417 }
418
419 static int __devinit init_setup_pdc20265(struct pci_dev *dev,
420                                          ide_pci_device_t *d)
421 {
422         if ((dev->bus->self) &&
423             (dev->bus->self->vendor == PCI_VENDOR_ID_INTEL) &&
424             ((dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960) ||
425              (dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960RM))) {
426                 printk(KERN_INFO "ide: Skipping Promise PDC20265 "
427                         "attached to I2O RAID controller.\n");
428                 return -ENODEV;
429         }
430         return ide_setup_pci_device(dev, d);
431 }
432
433 static int __devinit init_setup_pdc202xx(struct pci_dev *dev,
434                                          ide_pci_device_t *d)
435 {
436         return ide_setup_pci_device(dev, d);
437 }
438
439 static ide_pci_device_t pdc202xx_chipsets[] __devinitdata = {
440         {       /* 0 */
441                 .name           = "PDC20246",
442                 .init_setup     = init_setup_pdc202ata4,
443                 .init_chipset   = init_chipset_pdc202xx,
444                 .init_hwif      = init_hwif_pdc202xx,
445                 .init_dma       = init_dma_pdc202xx,
446                 .channels       = 2,
447                 .autodma        = AUTODMA,
448                 .bootable       = OFF_BOARD,
449                 .extra          = 16,
450                 .udma_mask      = 0x07, /* udma0-2 */
451         },{     /* 1 */
452                 .name           = "PDC20262",
453                 .init_setup     = init_setup_pdc202ata4,
454                 .init_chipset   = init_chipset_pdc202xx,
455                 .init_hwif      = init_hwif_pdc202xx,
456                 .init_dma       = init_dma_pdc202xx,
457                 .channels       = 2,
458                 .autodma        = AUTODMA,
459                 .bootable       = OFF_BOARD,
460                 .extra          = 48,
461                 .udma_mask      = 0x1f, /* udma0-4 */
462         },{     /* 2 */
463                 .name           = "PDC20263",
464                 .init_setup     = init_setup_pdc202ata4,
465                 .init_chipset   = init_chipset_pdc202xx,
466                 .init_hwif      = init_hwif_pdc202xx,
467                 .init_dma       = init_dma_pdc202xx,
468                 .channels       = 2,
469                 .autodma        = AUTODMA,
470                 .bootable       = OFF_BOARD,
471                 .extra          = 48,
472                 .udma_mask      = 0x1f, /* udma0-4 */
473         },{     /* 3 */
474                 .name           = "PDC20265",
475                 .init_setup     = init_setup_pdc20265,
476                 .init_chipset   = init_chipset_pdc202xx,
477                 .init_hwif      = init_hwif_pdc202xx,
478                 .init_dma       = init_dma_pdc202xx,
479                 .channels       = 2,
480                 .autodma        = AUTODMA,
481                 .bootable       = OFF_BOARD,
482                 .extra          = 48,
483                 .udma_mask      = 0x3f, /* udma0-5 */
484         },{     /* 4 */
485                 .name           = "PDC20267",
486                 .init_setup     = init_setup_pdc202xx,
487                 .init_chipset   = init_chipset_pdc202xx,
488                 .init_hwif      = init_hwif_pdc202xx,
489                 .init_dma       = init_dma_pdc202xx,
490                 .channels       = 2,
491                 .autodma        = AUTODMA,
492                 .bootable       = OFF_BOARD,
493                 .extra          = 48,
494                 .udma_mask      = 0x3f, /* udma0-5 */
495         }
496 };
497
498 /**
499  *      pdc202xx_init_one       -       called when a PDC202xx is found
500  *      @dev: the pdc202xx device
501  *      @id: the matching pci id
502  *
503  *      Called when the PCI registration layer (or the IDE initialization)
504  *      finds a device matching our IDE device tables.
505  */
506  
507 static int __devinit pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
508 {
509         ide_pci_device_t *d = &pdc202xx_chipsets[id->driver_data];
510
511         return d->init_setup(dev, d);
512 }
513
514 static struct pci_device_id pdc202xx_pci_tbl[] = {
515         { PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
516         { PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
517         { PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20263, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
518         { PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20265, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
519         { PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20267, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
520         { 0, },
521 };
522 MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);
523
524 static struct pci_driver driver = {
525         .name           = "Promise_Old_IDE",
526         .id_table       = pdc202xx_pci_tbl,
527         .probe          = pdc202xx_init_one,
528 };
529
530 static int __init pdc202xx_ide_init(void)
531 {
532         return ide_pci_register_driver(&driver);
533 }
534
535 module_init(pdc202xx_ide_init);
536
537 MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
538 MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
539 MODULE_LICENSE("GPL");