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 pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
162 pci_read_config_byte(dev, 0x54, &ultra_enable);
164 ultra_timing &= ~(0x0F << (4*unit));
165 ultra_enable &= ~(0x01 << drive->dn);
171 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
180 dma_timing |= dma_modes[2];
181 ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
182 ultra_enable |= (0x01 << drive->dn);
187 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
188 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
189 pci_write_config_byte(dev, 0x54, ultra_enable);
192 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
197 /* force Master Latency Timer value to 64 PCICLKs */
198 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
200 /* OSB4 : South Bridge and IDE */
201 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
202 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
203 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
205 pci_read_config_dword(isa_dev, 0x64, ®);
206 reg &= ~0x00002000; /* disable 600ns interrupt mask */
207 if(!(reg & 0x00004000))
208 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
209 reg |= 0x00004000; /* enable UDMA/33 support */
210 pci_write_config_dword(isa_dev, 0x64, reg);
214 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
215 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
216 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
217 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
219 /* Third Channel Test */
220 if (!(PCI_FUNC(dev->devfn) & 1)) {
221 struct pci_dev * findev = NULL;
223 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
224 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
226 pci_read_config_dword(findev, 0x4C, ®4c);
227 reg4c &= ~0x000007FF;
230 pci_write_config_dword(findev, 0x4C, reg4c);
233 outb_p(0x06, 0x0c00);
234 dev->irq = inb_p(0x0c01);
236 struct pci_dev * findev = NULL;
239 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
240 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
242 pci_read_config_byte(findev, 0x41, ®41);
244 pci_write_config_byte(findev, 0x41, reg41);
248 * This is a device pin issue on CSB6.
249 * Since there will be a future raid mode,
250 * early versions of the chipset require the
251 * interrupt pin to be set, and it is a compatibility
254 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
257 // pci_read_config_dword(dev, 0x40, &pioreg)
258 // pci_write_config_dword(dev, 0x40, 0x99999999);
259 // pci_read_config_dword(dev, 0x44, &dmareg);
260 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
261 /* setup the UDMA Control register
263 * 1. clear bit 6 to enable DMA
264 * 2. enable DMA modes with bits 0-1
268 * 11 : udma2/udma4/udma5
270 pci_read_config_byte(dev, 0x5A, &btr);
272 if (!(PCI_FUNC(dev->devfn) & 1))
275 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
276 pci_write_config_byte(dev, 0x5A, btr);
278 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
279 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
280 pci_read_config_byte(dev, 0x5A, &btr);
283 pci_write_config_byte(dev, 0x5A, btr);
289 static u8 __devinit ata66_svwks_svwks(ide_hwif_t *hwif)
291 return ATA_CBL_PATA80;
294 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
295 * of the subsystem device ID indicate presence of an 80-pin cable.
296 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
297 * Bit 15 set = secondary IDE channel has 80-pin cable.
298 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
299 * Bit 14 set = primary IDE channel has 80-pin cable.
301 static u8 __devinit ata66_svwks_dell(ide_hwif_t *hwif)
303 struct pci_dev *dev = hwif->pci_dev;
304 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
305 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
306 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
307 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
308 return ((1 << (hwif->channel + 14)) &
309 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
310 return ATA_CBL_PATA40;
313 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
314 * detect issue by attaching the drives directly to the board.
315 * This check follows the Dell precedent (how scary is that?!)
317 * WARNING: this only works on Alpine hardware!
319 static u8 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif)
321 struct pci_dev *dev = hwif->pci_dev;
322 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
323 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
324 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
325 return ((1 << (hwif->channel + 14)) &
326 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
327 return ATA_CBL_PATA40;
330 static u8 __devinit ata66_svwks(ide_hwif_t *hwif)
332 struct pci_dev *dev = hwif->pci_dev;
335 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
336 return ata66_svwks_svwks (hwif);
339 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
340 return ata66_svwks_dell (hwif);
343 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
344 return ata66_svwks_cobalt (hwif);
346 /* Per Specified Design by OEM, and ASIC Architect */
347 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
348 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
349 return ATA_CBL_PATA80;
351 return ATA_CBL_PATA40;
354 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
356 hwif->set_pio_mode = &svwks_set_pio_mode;
357 hwif->set_dma_mode = &svwks_set_dma_mode;
358 hwif->udma_filter = &svwks_udma_filter;
363 if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
364 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
365 hwif->cbl = ata66_svwks(hwif);
369 static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
371 .name = "SvrWks OSB4",
372 .init_chipset = init_chipset_svwks,
373 .init_hwif = init_hwif_svwks,
374 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
375 .pio_mask = ATA_PIO4,
376 .mwdma_mask = ATA_MWDMA2,
377 .udma_mask = 0x00, /* UDMA is problematic on OSB4 */
379 .name = "SvrWks CSB5",
380 .init_chipset = init_chipset_svwks,
381 .init_hwif = init_hwif_svwks,
382 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
383 .pio_mask = ATA_PIO4,
384 .mwdma_mask = ATA_MWDMA2,
385 .udma_mask = ATA_UDMA5,
387 .name = "SvrWks CSB6",
388 .init_chipset = init_chipset_svwks,
389 .init_hwif = init_hwif_svwks,
390 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
391 .pio_mask = ATA_PIO4,
392 .mwdma_mask = ATA_MWDMA2,
393 .udma_mask = ATA_UDMA5,
395 .name = "SvrWks CSB6",
396 .init_chipset = init_chipset_svwks,
397 .init_hwif = init_hwif_svwks,
398 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_SINGLE |
400 .pio_mask = ATA_PIO4,
401 .mwdma_mask = ATA_MWDMA2,
402 .udma_mask = ATA_UDMA5,
404 .name = "SvrWks HT1000",
405 .init_chipset = init_chipset_svwks,
406 .init_hwif = init_hwif_svwks,
407 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_SINGLE |
409 .pio_mask = ATA_PIO4,
410 .mwdma_mask = ATA_MWDMA2,
411 .udma_mask = ATA_UDMA5,
416 * svwks_init_one - called when a OSB/CSB is found
417 * @dev: the svwks device
418 * @id: the matching pci id
420 * Called when the PCI registration layer (or the IDE initialization)
421 * finds a device matching our IDE device tables.
424 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
426 struct ide_port_info d;
427 u8 idx = id->driver_data;
429 d = serverworks_chipsets[idx];
431 if (idx == 2 || idx == 3) {
432 if ((PCI_FUNC(dev->devfn) & 1) == 0) {
433 if (pci_resource_start(dev, 0) != 0x01f1)
434 d.host_flags &= ~IDE_HFLAG_BOOTABLE;
435 d.host_flags |= IDE_HFLAG_SINGLE;
437 d.host_flags &= ~IDE_HFLAG_SINGLE;
440 return ide_setup_pci_device(dev, &d);
443 static const struct pci_device_id svwks_pci_tbl[] = {
444 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0 },
445 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1 },
446 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2 },
447 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3 },
448 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
451 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
453 static struct pci_driver driver = {
454 .name = "Serverworks_IDE",
455 .id_table = svwks_pci_tbl,
456 .probe = svwks_init_one,
459 static int __init svwks_ide_init(void)
461 return ide_pci_register_driver(&driver);
464 module_init(svwks_ide_init);
466 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
467 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
468 MODULE_LICENSE("GPL");