2 * linux/drivers/ide/pci/serverworks.c Version 0.22 Jun 27 2007
4 * Copyright (C) 1998-2000 Michel Aubry
5 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
6 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
7 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
8 * Portions copyright (c) 2001 Sun Microsystems
11 * RCC/ServerWorks IDE driver for Linux
13 * OSB4: `Open South Bridge' IDE Interface (fn 1)
14 * supports UDMA mode 2 (33 MB/s)
16 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
17 * all revisions support UDMA mode 4 (66 MB/s)
18 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
20 * *** The CSB5 does not provide ANY register ***
21 * *** to detect 80-conductor cable presence. ***
23 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
25 * HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
26 * controller same as the CSB6. Single channel ATA100 only.
29 * Available under NDA only. Errata info very hard to get.
33 #include <linux/types.h>
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 #include <linux/hdreg.h>
39 #include <linux/ide.h>
40 #include <linux/init.h>
41 #include <linux/delay.h>
45 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
46 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
48 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
49 * can overrun their FIFOs when used with the CSB5 */
50 static const char *svwks_bad_ata100[] = {
58 static struct pci_dev *isa_dev;
60 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
63 if (!strcmp(*list++, drive->id->model))
68 static u8 svwks_udma_filter(ide_drive_t *drive)
70 struct pci_dev *dev = HWIF(drive)->pci_dev;
73 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
75 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
78 pci_read_config_dword(isa_dev, 0x64, ®);
81 * Don't enable UDMA on disk devices for the moment
83 if(drive->media == ide_disk)
85 /* Check the OSB4 DMA33 enable bit */
86 return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
87 } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
89 } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
91 pci_read_config_byte(dev, 0x5A, &btr);
94 /* If someone decides to do UDMA133 on CSB5 the same
95 issue will bite so be inclusive */
96 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
100 case 3: mask = 0x3f; break;
101 case 2: mask = 0x1f; break;
102 case 1: mask = 0x07; break;
103 default: mask = 0x00; break;
106 if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
107 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
108 (!(PCI_FUNC(dev->devfn) & 1)))
114 static u8 svwks_csb_check (struct pci_dev *dev)
116 switch (dev->device) {
117 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
118 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
119 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
120 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
128 static void svwks_set_pio_mode(ide_drive_t *drive, const u8 pio)
130 static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
131 static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
133 struct pci_dev *dev = drive->hwif->pci_dev;
135 pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
137 if (svwks_csb_check(dev)) {
140 pci_read_config_word(dev, 0x4a, &csb_pio);
142 csb_pio &= ~(0x0f << (4 * drive->dn));
143 csb_pio |= (pio << (4 * drive->dn));
145 pci_write_config_word(dev, 0x4a, csb_pio);
149 static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
151 static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
152 static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
153 static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };
155 ide_hwif_t *hwif = HWIF(drive);
156 struct pci_dev *dev = hwif->pci_dev;
157 u8 unit = (drive->select.b.unit & 0x01);
159 u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0;
161 /* If we are about to put a disk into UDMA mode we screwed up.
162 Our code assumes we never _ever_ do this on an OSB4 */
164 if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
165 drive->media == ide_disk && speed >= XFER_UDMA_0)
168 pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
169 pci_read_config_byte(dev, 0x54, &ultra_enable);
171 ultra_timing &= ~(0x0F << (4*unit));
172 ultra_enable &= ~(0x01 << drive->dn);
178 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
187 dma_timing |= dma_modes[2];
188 ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
189 ultra_enable |= (0x01 << drive->dn);
194 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
195 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
196 pci_write_config_byte(dev, 0x54, ultra_enable);
199 static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
201 if (ide_tune_dma(drive))
204 ide_set_max_pio(drive);
209 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
214 /* force Master Latency Timer value to 64 PCICLKs */
215 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
217 /* OSB4 : South Bridge and IDE */
218 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
219 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
220 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
222 pci_read_config_dword(isa_dev, 0x64, ®);
223 reg &= ~0x00002000; /* disable 600ns interrupt mask */
224 if(!(reg & 0x00004000))
225 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
226 reg |= 0x00004000; /* enable UDMA/33 support */
227 pci_write_config_dword(isa_dev, 0x64, reg);
231 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
232 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
233 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
234 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
236 /* Third Channel Test */
237 if (!(PCI_FUNC(dev->devfn) & 1)) {
238 struct pci_dev * findev = NULL;
240 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
241 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
243 pci_read_config_dword(findev, 0x4C, ®4c);
244 reg4c &= ~0x000007FF;
247 pci_write_config_dword(findev, 0x4C, reg4c);
250 outb_p(0x06, 0x0c00);
251 dev->irq = inb_p(0x0c01);
253 struct pci_dev * findev = NULL;
256 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
257 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
259 pci_read_config_byte(findev, 0x41, ®41);
261 pci_write_config_byte(findev, 0x41, reg41);
265 * This is a device pin issue on CSB6.
266 * Since there will be a future raid mode,
267 * early versions of the chipset require the
268 * interrupt pin to be set, and it is a compatibility
271 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
274 // pci_read_config_dword(dev, 0x40, &pioreg)
275 // pci_write_config_dword(dev, 0x40, 0x99999999);
276 // pci_read_config_dword(dev, 0x44, &dmareg);
277 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
278 /* setup the UDMA Control register
280 * 1. clear bit 6 to enable DMA
281 * 2. enable DMA modes with bits 0-1
285 * 11 : udma2/udma4/udma5
287 pci_read_config_byte(dev, 0x5A, &btr);
289 if (!(PCI_FUNC(dev->devfn) & 1))
292 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
293 pci_write_config_byte(dev, 0x5A, btr);
295 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
296 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
297 pci_read_config_byte(dev, 0x5A, &btr);
300 pci_write_config_byte(dev, 0x5A, btr);
306 static u8 __devinit ata66_svwks_svwks(ide_hwif_t *hwif)
308 return ATA_CBL_PATA80;
311 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
312 * of the subsystem device ID indicate presence of an 80-pin cable.
313 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
314 * Bit 15 set = secondary IDE channel has 80-pin cable.
315 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
316 * Bit 14 set = primary IDE channel has 80-pin cable.
318 static u8 __devinit ata66_svwks_dell(ide_hwif_t *hwif)
320 struct pci_dev *dev = hwif->pci_dev;
321 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
322 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
323 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
324 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
325 return ((1 << (hwif->channel + 14)) &
326 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
327 return ATA_CBL_PATA40;
330 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
331 * detect issue by attaching the drives directly to the board.
332 * This check follows the Dell precedent (how scary is that?!)
334 * WARNING: this only works on Alpine hardware!
336 static u8 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif)
338 struct pci_dev *dev = hwif->pci_dev;
339 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
340 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
341 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
342 return ((1 << (hwif->channel + 14)) &
343 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
344 return ATA_CBL_PATA40;
347 static u8 __devinit ata66_svwks(ide_hwif_t *hwif)
349 struct pci_dev *dev = hwif->pci_dev;
352 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
353 return ata66_svwks_svwks (hwif);
356 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
357 return ata66_svwks_dell (hwif);
360 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
361 return ata66_svwks_cobalt (hwif);
363 /* Per Specified Design by OEM, and ASIC Architect */
364 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
365 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
366 return ATA_CBL_PATA80;
368 return ATA_CBL_PATA40;
371 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
374 hwif->irq = hwif->channel ? 15 : 14;
376 hwif->set_pio_mode = &svwks_set_pio_mode;
377 hwif->set_dma_mode = &svwks_set_dma_mode;
378 hwif->udma_filter = &svwks_udma_filter;
382 if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
383 hwif->ultra_mask = 0x3f;
385 hwif->mwdma_mask = 0x07;
389 hwif->drives[0].autotune = 1;
390 hwif->drives[1].autotune = 1;
395 hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
396 if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
397 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
398 hwif->cbl = ata66_svwks(hwif);
403 hwif->drives[0].autodma = hwif->drives[1].autodma = 1;
406 static int __devinit init_setup_svwks (struct pci_dev *dev, ide_pci_device_t *d)
408 return ide_setup_pci_device(dev, d);
411 static int __devinit init_setup_csb6 (struct pci_dev *dev, ide_pci_device_t *d)
413 if (!(PCI_FUNC(dev->devfn) & 1)) {
414 d->bootable = NEVER_BOARD;
415 if (dev->resource[0].start == 0x01f1)
416 d->bootable = ON_BOARD;
419 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE ||
420 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
421 (!(PCI_FUNC(dev->devfn) & 1)))
422 d->host_flags |= IDE_HFLAG_SINGLE;
424 d->host_flags &= ~IDE_HFLAG_SINGLE;
426 return ide_setup_pci_device(dev, d);
429 static ide_pci_device_t serverworks_chipsets[] __devinitdata = {
431 .name = "SvrWks OSB4",
432 .init_setup = init_setup_svwks,
433 .init_chipset = init_chipset_svwks,
434 .init_hwif = init_hwif_svwks,
436 .bootable = ON_BOARD,
437 .pio_mask = ATA_PIO4,
439 .name = "SvrWks CSB5",
440 .init_setup = init_setup_svwks,
441 .init_chipset = init_chipset_svwks,
442 .init_hwif = init_hwif_svwks,
444 .bootable = ON_BOARD,
445 .pio_mask = ATA_PIO4,
447 .name = "SvrWks CSB6",
448 .init_setup = init_setup_csb6,
449 .init_chipset = init_chipset_svwks,
450 .init_hwif = init_hwif_svwks,
452 .bootable = ON_BOARD,
453 .pio_mask = ATA_PIO4,
455 .name = "SvrWks CSB6",
456 .init_setup = init_setup_csb6,
457 .init_chipset = init_chipset_svwks,
458 .init_hwif = init_hwif_svwks,
460 .bootable = ON_BOARD,
461 .host_flags = IDE_HFLAG_SINGLE,
462 .pio_mask = ATA_PIO4,
464 .name = "SvrWks HT1000",
465 .init_setup = init_setup_svwks,
466 .init_chipset = init_chipset_svwks,
467 .init_hwif = init_hwif_svwks,
469 .bootable = ON_BOARD,
470 .host_flags = IDE_HFLAG_SINGLE,
471 .pio_mask = ATA_PIO4,
476 * svwks_init_one - called when a OSB/CSB is found
477 * @dev: the svwks device
478 * @id: the matching pci id
480 * Called when the PCI registration layer (or the IDE initialization)
481 * finds a device matching our IDE device tables.
484 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
486 ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];
488 return d->init_setup(dev, d);
491 static struct pci_device_id svwks_pci_tbl[] = {
492 { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
493 { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
494 { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
495 { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
496 { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
499 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
501 static struct pci_driver driver = {
502 .name = "Serverworks_IDE",
503 .id_table = svwks_pci_tbl,
504 .probe = svwks_init_one,
507 static int __init svwks_ide_init(void)
509 return ide_pci_register_driver(&driver);
512 module_init(svwks_ide_init);
514 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
515 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
516 MODULE_LICENSE("GPL");