Linux 2.6.26-rc1
[cris-mirror.git] / drivers / ata / pata_sis.c
blobe82c66e8d31bdd211568a5bdbc9e3ae719633c17
1 /*
2 * pata_sis.c - SiS ATA driver
4 * (C) 2005 Red Hat <alan@redhat.com>
5 * (C) 2007 Bartlomiej Zolnierkiewicz
7 * Based upon linux/drivers/ide/pci/sis5513.c
8 * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
9 * Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
10 * Copyright (C) 2003 Vojtech Pavlik <vojtech@suse.cz>
11 * SiS Taiwan : for direct support and hardware.
12 * Daniela Engert : for initial ATA100 advices and numerous others.
13 * John Fremlin, Manfred Spraul, Dave Morgan, Peter Kjellerstedt :
14 * for checking code correctness, providing patches.
15 * Original tests and design on the SiS620 chipset.
16 * ATA100 tests and design on the SiS735 chipset.
17 * ATA16/33 support from specs
18 * ATA133 support for SiS961/962 by L.C. Chang <lcchang@sis.com.tw>
21 * TODO
22 * Check MWDMA on drives that don't support MWDMA speed pio cycles ?
23 * More Testing
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 <linux/device.h>
33 #include <scsi/scsi_host.h>
34 #include <linux/libata.h>
35 #include <linux/ata.h>
36 #include "sis.h"
38 #define DRV_NAME "pata_sis"
39 #define DRV_VERSION "0.5.2"
41 struct sis_chipset {
42 u16 device; /* PCI host ID */
43 const struct ata_port_info *info; /* Info block */
44 /* Probably add family, cable detect type etc here to clean
45 up code later */
48 struct sis_laptop {
49 u16 device;
50 u16 subvendor;
51 u16 subdevice;
54 static const struct sis_laptop sis_laptop[] = {
55 /* devid, subvendor, subdev */
56 { 0x5513, 0x1043, 0x1107 }, /* ASUS A6K */
57 { 0x5513, 0x1734, 0x105F }, /* FSC Amilo A1630 */
58 { 0x5513, 0x1071, 0x8640 }, /* EasyNote K5305 */
59 /* end marker */
60 { 0, }
63 static int sis_short_ata40(struct pci_dev *dev)
65 const struct sis_laptop *lap = &sis_laptop[0];
67 while (lap->device) {
68 if (lap->device == dev->device &&
69 lap->subvendor == dev->subsystem_vendor &&
70 lap->subdevice == dev->subsystem_device)
71 return 1;
72 lap++;
75 return 0;
78 /**
79 * sis_old_port_base - return PCI configuration base for dev
80 * @adev: device
82 * Returns the base of the PCI configuration registers for this port
83 * number.
86 static int sis_old_port_base(struct ata_device *adev)
88 return 0x40 + (4 * adev->link->ap->port_no) + (2 * adev->devno);
91 /**
92 * sis_133_cable_detect - check for 40/80 pin
93 * @ap: Port
94 * @deadline: deadline jiffies for the operation
96 * Perform cable detection for the later UDMA133 capable
97 * SiS chipset.
100 static int sis_133_cable_detect(struct ata_port *ap)
102 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
103 u16 tmp;
105 /* The top bit of this register is the cable detect bit */
106 pci_read_config_word(pdev, 0x50 + 2 * ap->port_no, &tmp);
107 if ((tmp & 0x8000) && !sis_short_ata40(pdev))
108 return ATA_CBL_PATA40;
109 return ATA_CBL_PATA80;
113 * sis_66_cable_detect - check for 40/80 pin
114 * @ap: Port
115 * @deadline: deadline jiffies for the operation
117 * Perform cable detection on the UDMA66, UDMA100 and early UDMA133
118 * SiS IDE controllers.
121 static int sis_66_cable_detect(struct ata_port *ap)
123 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
124 u8 tmp;
126 /* Older chips keep cable detect in bits 4/5 of reg 0x48 */
127 pci_read_config_byte(pdev, 0x48, &tmp);
128 tmp >>= ap->port_no;
129 if ((tmp & 0x10) && !sis_short_ata40(pdev))
130 return ATA_CBL_PATA40;
131 return ATA_CBL_PATA80;
136 * sis_pre_reset - probe begin
137 * @link: ATA link
138 * @deadline: deadline jiffies for the operation
140 * Set up cable type and use generic probe init
143 static int sis_pre_reset(struct ata_link *link, unsigned long deadline)
145 static const struct pci_bits sis_enable_bits[] = {
146 { 0x4aU, 1U, 0x02UL, 0x02UL }, /* port 0 */
147 { 0x4aU, 1U, 0x04UL, 0x04UL }, /* port 1 */
150 struct ata_port *ap = link->ap;
151 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
153 if (!pci_test_config_bits(pdev, &sis_enable_bits[ap->port_no]))
154 return -ENOENT;
156 /* Clear the FIFO settings. We can't enable the FIFO until
157 we know we are poking at a disk */
158 pci_write_config_byte(pdev, 0x4B, 0);
159 return ata_sff_prereset(link, deadline);
164 * sis_set_fifo - Set RWP fifo bits for this device
165 * @ap: Port
166 * @adev: Device
168 * SIS chipsets implement prefetch/postwrite bits for each device
169 * on both channels. This functionality is not ATAPI compatible and
170 * must be configured according to the class of device present
173 static void sis_set_fifo(struct ata_port *ap, struct ata_device *adev)
175 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
176 u8 fifoctrl;
177 u8 mask = 0x11;
179 mask <<= (2 * ap->port_no);
180 mask <<= adev->devno;
182 /* This holds various bits including the FIFO control */
183 pci_read_config_byte(pdev, 0x4B, &fifoctrl);
184 fifoctrl &= ~mask;
186 /* Enable for ATA (disk) only */
187 if (adev->class == ATA_DEV_ATA)
188 fifoctrl |= mask;
189 pci_write_config_byte(pdev, 0x4B, fifoctrl);
193 * sis_old_set_piomode - Initialize host controller PATA PIO timings
194 * @ap: Port whose timings we are configuring
195 * @adev: Device we are configuring for.
197 * Set PIO mode for device, in host controller PCI config space. This
198 * function handles PIO set up for all chips that are pre ATA100 and
199 * also early ATA100 devices.
201 * LOCKING:
202 * None (inherited from caller).
205 static void sis_old_set_piomode (struct ata_port *ap, struct ata_device *adev)
207 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
208 int port = sis_old_port_base(adev);
209 u8 t1, t2;
210 int speed = adev->pio_mode - XFER_PIO_0;
212 const u8 active[] = { 0x00, 0x07, 0x04, 0x03, 0x01 };
213 const u8 recovery[] = { 0x00, 0x06, 0x04, 0x03, 0x03 };
215 sis_set_fifo(ap, adev);
217 pci_read_config_byte(pdev, port, &t1);
218 pci_read_config_byte(pdev, port + 1, &t2);
220 t1 &= ~0x0F; /* Clear active/recovery timings */
221 t2 &= ~0x07;
223 t1 |= active[speed];
224 t2 |= recovery[speed];
226 pci_write_config_byte(pdev, port, t1);
227 pci_write_config_byte(pdev, port + 1, t2);
231 * sis_100_set_piomode - Initialize host controller PATA PIO timings
232 * @ap: Port whose timings we are configuring
233 * @adev: Device we are configuring for.
235 * Set PIO mode for device, in host controller PCI config space. This
236 * function handles PIO set up for ATA100 devices and early ATA133.
238 * LOCKING:
239 * None (inherited from caller).
242 static void sis_100_set_piomode (struct ata_port *ap, struct ata_device *adev)
244 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
245 int port = sis_old_port_base(adev);
246 int speed = adev->pio_mode - XFER_PIO_0;
248 const u8 actrec[] = { 0x00, 0x67, 0x44, 0x33, 0x31 };
250 sis_set_fifo(ap, adev);
252 pci_write_config_byte(pdev, port, actrec[speed]);
256 * sis_133_set_piomode - Initialize host controller PATA PIO timings
257 * @ap: Port whose timings we are configuring
258 * @adev: Device we are configuring for.
260 * Set PIO mode for device, in host controller PCI config space. This
261 * function handles PIO set up for the later ATA133 devices.
263 * LOCKING:
264 * None (inherited from caller).
267 static void sis_133_set_piomode (struct ata_port *ap, struct ata_device *adev)
269 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
270 int port = 0x40;
271 u32 t1;
272 u32 reg54;
273 int speed = adev->pio_mode - XFER_PIO_0;
275 const u32 timing133[] = {
276 0x28269000, /* Recovery << 24 | Act << 16 | Ini << 12 */
277 0x0C266000,
278 0x04263000,
279 0x0C0A3000,
280 0x05093000
282 const u32 timing100[] = {
283 0x1E1C6000, /* Recovery << 24 | Act << 16 | Ini << 12 */
284 0x091C4000,
285 0x031C2000,
286 0x09072000,
287 0x04062000
290 sis_set_fifo(ap, adev);
292 /* If bit 14 is set then the registers are mapped at 0x70 not 0x40 */
293 pci_read_config_dword(pdev, 0x54, &reg54);
294 if (reg54 & 0x40000000)
295 port = 0x70;
296 port += 8 * ap->port_no + 4 * adev->devno;
298 pci_read_config_dword(pdev, port, &t1);
299 t1 &= 0xC0C00FFF; /* Mask out timing */
301 if (t1 & 0x08) /* 100 or 133 ? */
302 t1 |= timing133[speed];
303 else
304 t1 |= timing100[speed];
305 pci_write_config_byte(pdev, port, t1);
309 * sis_old_set_dmamode - Initialize host controller PATA DMA timings
310 * @ap: Port whose timings we are configuring
311 * @adev: Device to program
313 * Set UDMA/MWDMA mode for device, in host controller PCI config space.
314 * Handles pre UDMA and UDMA33 devices. Supports MWDMA as well unlike
315 * the old ide/pci driver.
317 * LOCKING:
318 * None (inherited from caller).
321 static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
323 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
324 int speed = adev->dma_mode - XFER_MW_DMA_0;
325 int drive_pci = sis_old_port_base(adev);
326 u16 timing;
328 const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
329 const u16 udma_bits[] = { 0xE000, 0xC000, 0xA000 };
331 pci_read_config_word(pdev, drive_pci, &timing);
333 if (adev->dma_mode < XFER_UDMA_0) {
334 /* bits 3-0 hold recovery timing bits 8-10 active timing and
335 the higher bits are dependant on the device */
336 timing &= ~0x870F;
337 timing |= mwdma_bits[speed];
338 } else {
339 /* Bit 15 is UDMA on/off, bit 13-14 are cycle time */
340 speed = adev->dma_mode - XFER_UDMA_0;
341 timing &= ~0x6000;
342 timing |= udma_bits[speed];
344 pci_write_config_word(pdev, drive_pci, timing);
348 * sis_66_set_dmamode - Initialize host controller PATA DMA timings
349 * @ap: Port whose timings we are configuring
350 * @adev: Device to program
352 * Set UDMA/MWDMA mode for device, in host controller PCI config space.
353 * Handles UDMA66 and early UDMA100 devices. Supports MWDMA as well unlike
354 * the old ide/pci driver.
356 * LOCKING:
357 * None (inherited from caller).
360 static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev)
362 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
363 int speed = adev->dma_mode - XFER_MW_DMA_0;
364 int drive_pci = sis_old_port_base(adev);
365 u16 timing;
367 /* MWDMA 0-2 and UDMA 0-5 */
368 const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
369 const u16 udma_bits[] = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000, 0x8000 };
371 pci_read_config_word(pdev, drive_pci, &timing);
373 if (adev->dma_mode < XFER_UDMA_0) {
374 /* bits 3-0 hold recovery timing bits 8-10 active timing and
375 the higher bits are dependant on the device, bit 15 udma */
376 timing &= ~0x870F;
377 timing |= mwdma_bits[speed];
378 } else {
379 /* Bit 15 is UDMA on/off, bit 12-14 are cycle time */
380 speed = adev->dma_mode - XFER_UDMA_0;
381 timing &= ~0xF000;
382 timing |= udma_bits[speed];
384 pci_write_config_word(pdev, drive_pci, timing);
388 * sis_100_set_dmamode - Initialize host controller PATA DMA timings
389 * @ap: Port whose timings we are configuring
390 * @adev: Device to program
392 * Set UDMA/MWDMA mode for device, in host controller PCI config space.
393 * Handles UDMA66 and early UDMA100 devices.
395 * LOCKING:
396 * None (inherited from caller).
399 static void sis_100_set_dmamode (struct ata_port *ap, struct ata_device *adev)
401 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
402 int speed = adev->dma_mode - XFER_MW_DMA_0;
403 int drive_pci = sis_old_port_base(adev);
404 u8 timing;
406 const u8 udma_bits[] = { 0x8B, 0x87, 0x85, 0x83, 0x82, 0x81};
408 pci_read_config_byte(pdev, drive_pci + 1, &timing);
410 if (adev->dma_mode < XFER_UDMA_0) {
411 /* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */
412 } else {
413 /* Bit 7 is UDMA on/off, bit 0-3 are cycle time */
414 speed = adev->dma_mode - XFER_UDMA_0;
415 timing &= ~0x8F;
416 timing |= udma_bits[speed];
418 pci_write_config_byte(pdev, drive_pci + 1, timing);
422 * sis_133_early_set_dmamode - Initialize host controller PATA DMA timings
423 * @ap: Port whose timings we are configuring
424 * @adev: Device to program
426 * Set UDMA/MWDMA mode for device, in host controller PCI config space.
427 * Handles early SiS 961 bridges.
429 * LOCKING:
430 * None (inherited from caller).
433 static void sis_133_early_set_dmamode (struct ata_port *ap, struct ata_device *adev)
435 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
436 int speed = adev->dma_mode - XFER_MW_DMA_0;
437 int drive_pci = sis_old_port_base(adev);
438 u8 timing;
439 /* Low 4 bits are timing */
440 static const u8 udma_bits[] = { 0x8F, 0x8A, 0x87, 0x85, 0x83, 0x82, 0x81};
442 pci_read_config_byte(pdev, drive_pci + 1, &timing);
444 if (adev->dma_mode < XFER_UDMA_0) {
445 /* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */
446 } else {
447 /* Bit 7 is UDMA on/off, bit 0-3 are cycle time */
448 speed = adev->dma_mode - XFER_UDMA_0;
449 timing &= ~0x8F;
450 timing |= udma_bits[speed];
452 pci_write_config_byte(pdev, drive_pci + 1, timing);
456 * sis_133_set_dmamode - Initialize host controller PATA DMA timings
457 * @ap: Port whose timings we are configuring
458 * @adev: Device to program
460 * Set UDMA/MWDMA mode for device, in host controller PCI config space.
462 * LOCKING:
463 * None (inherited from caller).
466 static void sis_133_set_dmamode (struct ata_port *ap, struct ata_device *adev)
468 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
469 int speed = adev->dma_mode - XFER_MW_DMA_0;
470 int port = 0x40;
471 u32 t1;
472 u32 reg54;
474 /* bits 4- cycle time 8 - cvs time */
475 static const u32 timing_u100[] = { 0x6B0, 0x470, 0x350, 0x140, 0x120, 0x110, 0x000 };
476 static const u32 timing_u133[] = { 0x9F0, 0x6A0, 0x470, 0x250, 0x230, 0x220, 0x210 };
478 /* If bit 14 is set then the registers are mapped at 0x70 not 0x40 */
479 pci_read_config_dword(pdev, 0x54, &reg54);
480 if (reg54 & 0x40000000)
481 port = 0x70;
482 port += (8 * ap->port_no) + (4 * adev->devno);
484 pci_read_config_dword(pdev, port, &t1);
486 if (adev->dma_mode < XFER_UDMA_0) {
487 t1 &= ~0x00000004;
488 /* FIXME: need data sheet to add MWDMA here. Also lacking on
489 ide/pci driver */
490 } else {
491 speed = adev->dma_mode - XFER_UDMA_0;
492 /* if & 8 no UDMA133 - need info for ... */
493 t1 &= ~0x00000FF0;
494 t1 |= 0x00000004;
495 if (t1 & 0x08)
496 t1 |= timing_u133[speed];
497 else
498 t1 |= timing_u100[speed];
500 pci_write_config_dword(pdev, port, t1);
503 static struct scsi_host_template sis_sht = {
504 ATA_BMDMA_SHT(DRV_NAME),
507 static struct ata_port_operations sis_133_for_sata_ops = {
508 .inherits = &ata_bmdma_port_ops,
509 .set_piomode = sis_133_set_piomode,
510 .set_dmamode = sis_133_set_dmamode,
511 .cable_detect = sis_133_cable_detect,
514 static struct ata_port_operations sis_base_ops = {
515 .inherits = &ata_bmdma_port_ops,
516 .prereset = sis_pre_reset,
519 static struct ata_port_operations sis_133_ops = {
520 .inherits = &sis_base_ops,
521 .set_piomode = sis_133_set_piomode,
522 .set_dmamode = sis_133_set_dmamode,
523 .cable_detect = sis_133_cable_detect,
526 static struct ata_port_operations sis_133_early_ops = {
527 .inherits = &sis_base_ops,
528 .set_piomode = sis_100_set_piomode,
529 .set_dmamode = sis_133_early_set_dmamode,
530 .cable_detect = sis_66_cable_detect,
533 static struct ata_port_operations sis_100_ops = {
534 .inherits = &sis_base_ops,
535 .set_piomode = sis_100_set_piomode,
536 .set_dmamode = sis_100_set_dmamode,
537 .cable_detect = sis_66_cable_detect,
540 static struct ata_port_operations sis_66_ops = {
541 .inherits = &sis_base_ops,
542 .set_piomode = sis_old_set_piomode,
543 .set_dmamode = sis_66_set_dmamode,
544 .cable_detect = sis_66_cable_detect,
547 static struct ata_port_operations sis_old_ops = {
548 .inherits = &sis_base_ops,
549 .set_piomode = sis_old_set_piomode,
550 .set_dmamode = sis_old_set_dmamode,
551 .cable_detect = ata_cable_40wire,
554 static const struct ata_port_info sis_info = {
555 .flags = ATA_FLAG_SLAVE_POSS,
556 .pio_mask = 0x1f, /* pio0-4 */
557 .mwdma_mask = 0x07,
558 .udma_mask = 0,
559 .port_ops = &sis_old_ops,
561 static const struct ata_port_info sis_info33 = {
562 .flags = ATA_FLAG_SLAVE_POSS,
563 .pio_mask = 0x1f, /* pio0-4 */
564 .mwdma_mask = 0x07,
565 .udma_mask = ATA_UDMA2, /* UDMA 33 */
566 .port_ops = &sis_old_ops,
568 static const struct ata_port_info sis_info66 = {
569 .flags = ATA_FLAG_SLAVE_POSS,
570 .pio_mask = 0x1f, /* pio0-4 */
571 .udma_mask = ATA_UDMA4, /* UDMA 66 */
572 .port_ops = &sis_66_ops,
574 static const struct ata_port_info sis_info100 = {
575 .flags = ATA_FLAG_SLAVE_POSS,
576 .pio_mask = 0x1f, /* pio0-4 */
577 .udma_mask = ATA_UDMA5,
578 .port_ops = &sis_100_ops,
580 static const struct ata_port_info sis_info100_early = {
581 .flags = ATA_FLAG_SLAVE_POSS,
582 .udma_mask = ATA_UDMA5,
583 .pio_mask = 0x1f, /* pio0-4 */
584 .port_ops = &sis_66_ops,
586 static const struct ata_port_info sis_info133 = {
587 .flags = ATA_FLAG_SLAVE_POSS,
588 .pio_mask = 0x1f, /* pio0-4 */
589 .udma_mask = ATA_UDMA6,
590 .port_ops = &sis_133_ops,
592 const struct ata_port_info sis_info133_for_sata = {
593 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
594 .pio_mask = 0x1f, /* pio0-4 */
595 .udma_mask = ATA_UDMA6,
596 .port_ops = &sis_133_for_sata_ops,
598 static const struct ata_port_info sis_info133_early = {
599 .flags = ATA_FLAG_SLAVE_POSS,
600 .pio_mask = 0x1f, /* pio0-4 */
601 .udma_mask = ATA_UDMA6,
602 .port_ops = &sis_133_early_ops,
605 /* Privately shared with the SiS180 SATA driver, not for use elsewhere */
606 EXPORT_SYMBOL_GPL(sis_info133_for_sata);
608 static void sis_fixup(struct pci_dev *pdev, struct sis_chipset *sis)
610 u16 regw;
611 u8 reg;
613 if (sis->info == &sis_info133) {
614 pci_read_config_word(pdev, 0x50, &regw);
615 if (regw & 0x08)
616 pci_write_config_word(pdev, 0x50, regw & ~0x08);
617 pci_read_config_word(pdev, 0x52, &regw);
618 if (regw & 0x08)
619 pci_write_config_word(pdev, 0x52, regw & ~0x08);
620 return;
623 if (sis->info == &sis_info133_early || sis->info == &sis_info100) {
624 /* Fix up latency */
625 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
626 /* Set compatibility bit */
627 pci_read_config_byte(pdev, 0x49, &reg);
628 if (!(reg & 0x01))
629 pci_write_config_byte(pdev, 0x49, reg | 0x01);
630 return;
633 if (sis->info == &sis_info66 || sis->info == &sis_info100_early) {
634 /* Fix up latency */
635 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
636 /* Set compatibility bit */
637 pci_read_config_byte(pdev, 0x52, &reg);
638 if (!(reg & 0x04))
639 pci_write_config_byte(pdev, 0x52, reg | 0x04);
640 return;
643 if (sis->info == &sis_info33) {
644 pci_read_config_byte(pdev, PCI_CLASS_PROG, &reg);
645 if (( reg & 0x0F ) != 0x00)
646 pci_write_config_byte(pdev, PCI_CLASS_PROG, reg & 0xF0);
647 /* Fall through to ATA16 fixup below */
650 if (sis->info == &sis_info || sis->info == &sis_info33) {
651 /* force per drive recovery and active timings
652 needed on ATA_33 and below chips */
653 pci_read_config_byte(pdev, 0x52, &reg);
654 if (!(reg & 0x08))
655 pci_write_config_byte(pdev, 0x52, reg|0x08);
656 return;
659 BUG();
663 * sis_init_one - Register SiS ATA PCI device with kernel services
664 * @pdev: PCI device to register
665 * @ent: Entry in sis_pci_tbl matching with @pdev
667 * Called from kernel PCI layer. We probe for combined mode (sigh),
668 * and then hand over control to libata, for it to do the rest.
670 * LOCKING:
671 * Inherited from PCI layer (may sleep).
673 * RETURNS:
674 * Zero on success, or -ERRNO value.
677 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
679 static int printed_version;
680 const struct ata_port_info *ppi[] = { NULL, NULL };
681 struct pci_dev *host = NULL;
682 struct sis_chipset *chipset = NULL;
683 struct sis_chipset *sets;
684 int rc;
686 static struct sis_chipset sis_chipsets[] = {
688 { 0x0968, &sis_info133 },
689 { 0x0966, &sis_info133 },
690 { 0x0965, &sis_info133 },
691 { 0x0745, &sis_info100 },
692 { 0x0735, &sis_info100 },
693 { 0x0733, &sis_info100 },
694 { 0x0635, &sis_info100 },
695 { 0x0633, &sis_info100 },
697 { 0x0730, &sis_info100_early }, /* 100 with ATA 66 layout */
698 { 0x0550, &sis_info100_early }, /* 100 with ATA 66 layout */
700 { 0x0640, &sis_info66 },
701 { 0x0630, &sis_info66 },
702 { 0x0620, &sis_info66 },
703 { 0x0540, &sis_info66 },
704 { 0x0530, &sis_info66 },
706 { 0x5600, &sis_info33 },
707 { 0x5598, &sis_info33 },
708 { 0x5597, &sis_info33 },
709 { 0x5591, &sis_info33 },
710 { 0x5582, &sis_info33 },
711 { 0x5581, &sis_info33 },
713 { 0x5596, &sis_info },
714 { 0x5571, &sis_info },
715 { 0x5517, &sis_info },
716 { 0x5511, &sis_info },
720 static struct sis_chipset sis133_early = {
721 0x0, &sis_info133_early
723 static struct sis_chipset sis133 = {
724 0x0, &sis_info133
726 static struct sis_chipset sis100_early = {
727 0x0, &sis_info100_early
729 static struct sis_chipset sis100 = {
730 0x0, &sis_info100
733 if (!printed_version++)
734 dev_printk(KERN_DEBUG, &pdev->dev,
735 "version " DRV_VERSION "\n");
737 rc = pcim_enable_device(pdev);
738 if (rc)
739 return rc;
741 /* We have to find the bridge first */
742 for (sets = &sis_chipsets[0]; sets->device; sets++) {
743 host = pci_get_device(PCI_VENDOR_ID_SI, sets->device, NULL);
744 if (host != NULL) {
745 chipset = sets; /* Match found */
746 if (sets->device == 0x630) { /* SIS630 */
747 if (host->revision >= 0x30) /* 630 ET */
748 chipset = &sis100_early;
750 break;
754 /* Look for concealed bridges */
755 if (chipset == NULL) {
756 /* Second check */
757 u32 idemisc;
758 u16 trueid;
760 /* Disable ID masking and register remapping then
761 see what the real ID is */
763 pci_read_config_dword(pdev, 0x54, &idemisc);
764 pci_write_config_dword(pdev, 0x54, idemisc & 0x7fffffff);
765 pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid);
766 pci_write_config_dword(pdev, 0x54, idemisc);
768 switch(trueid) {
769 case 0x5518: /* SIS 962/963 */
770 chipset = &sis133;
771 if ((idemisc & 0x40000000) == 0) {
772 pci_write_config_dword(pdev, 0x54, idemisc | 0x40000000);
773 printk(KERN_INFO "SIS5513: Switching to 5513 register mapping\n");
775 break;
776 case 0x0180: /* SIS 965/965L */
777 chipset = &sis133;
778 break;
779 case 0x1180: /* SIS 966/966L */
780 chipset = &sis133;
781 break;
785 /* Further check */
786 if (chipset == NULL) {
787 struct pci_dev *lpc_bridge;
788 u16 trueid;
789 u8 prefctl;
790 u8 idecfg;
792 /* Try the second unmasking technique */
793 pci_read_config_byte(pdev, 0x4a, &idecfg);
794 pci_write_config_byte(pdev, 0x4a, idecfg | 0x10);
795 pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid);
796 pci_write_config_byte(pdev, 0x4a, idecfg);
798 switch(trueid) {
799 case 0x5517:
800 lpc_bridge = pci_get_slot(pdev->bus, 0x10); /* Bus 0 Dev 2 Fn 0 */
801 if (lpc_bridge == NULL)
802 break;
803 pci_read_config_byte(pdev, 0x49, &prefctl);
804 pci_dev_put(lpc_bridge);
806 if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) {
807 chipset = &sis133_early;
808 break;
810 chipset = &sis100;
811 break;
814 pci_dev_put(host);
816 /* No chipset info, no support */
817 if (chipset == NULL)
818 return -ENODEV;
820 ppi[0] = chipset->info;
822 sis_fixup(pdev, chipset);
824 return ata_pci_sff_init_one(pdev, ppi, &sis_sht, chipset);
827 static const struct pci_device_id sis_pci_tbl[] = {
828 { PCI_VDEVICE(SI, 0x5513), }, /* SiS 5513 */
829 { PCI_VDEVICE(SI, 0x5518), }, /* SiS 5518 */
830 { PCI_VDEVICE(SI, 0x1180), }, /* SiS 1180 */
835 static struct pci_driver sis_pci_driver = {
836 .name = DRV_NAME,
837 .id_table = sis_pci_tbl,
838 .probe = sis_init_one,
839 .remove = ata_pci_remove_one,
840 #ifdef CONFIG_PM
841 .suspend = ata_pci_device_suspend,
842 .resume = ata_pci_device_resume,
843 #endif
846 static int __init sis_init(void)
848 return pci_register_driver(&sis_pci_driver);
851 static void __exit sis_exit(void)
853 pci_unregister_driver(&sis_pci_driver);
856 module_init(sis_init);
857 module_exit(sis_exit);
859 MODULE_AUTHOR("Alan Cox");
860 MODULE_DESCRIPTION("SCSI low-level driver for SiS ATA");
861 MODULE_LICENSE("GPL");
862 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
863 MODULE_VERSION(DRV_VERSION);