2 * Copyright (C) 1998-2000 Michel Aubry
3 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
4 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
6 * Portions copyright (c) 2001 Sun Microsystems
9 * RCC/ServerWorks IDE driver for Linux
11 * OSB4: `Open South Bridge' IDE Interface (fn 1)
12 * supports UDMA mode 2 (33 MB/s)
14 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
15 * all revisions support UDMA mode 4 (66 MB/s)
16 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
18 * *** The CSB5 does not provide ANY register ***
19 * *** to detect 80-conductor cable presence. ***
21 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
23 * HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
24 * controller same as the CSB6. Single channel ATA100 only.
27 * Available under NDA only. Errata info very hard to get.
31 #include <linux/types.h>
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/pci.h>
35 #include <linux/hdreg.h>
36 #include <linux/ide.h>
37 #include <linux/init.h>
41 #define DRV_NAME "serverworks"
43 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
44 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
46 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
47 * can overrun their FIFOs when used with the CSB5 */
48 static const char *svwks_bad_ata100[] = {
56 static struct pci_dev *isa_dev;
58 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
60 char *m = (char *)&drive->id[ATA_ID_PROD];
63 if (!strcmp(*list++, m))
68 static u8 svwks_udma_filter(ide_drive_t *drive)
70 struct pci_dev *dev = to_pci_dev(drive->hwif->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 = to_pci_dev(drive->hwif->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 = to_pci_dev(hwif->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);
167 if (speed >= XFER_UDMA_0) {
168 dma_timing |= dma_modes[2];
169 ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
170 ultra_enable |= (0x01 << drive->dn);
171 } else if (speed >= XFER_MW_DMA_0)
172 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
174 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
175 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
176 pci_write_config_byte(dev, 0x54, ultra_enable);
179 static unsigned int __devinit init_chipset_svwks(struct pci_dev *dev)
184 /* force Master Latency Timer value to 64 PCICLKs */
185 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
187 /* OSB4 : South Bridge and IDE */
188 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
189 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
190 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
192 pci_read_config_dword(isa_dev, 0x64, ®);
193 reg &= ~0x00002000; /* disable 600ns interrupt mask */
194 if(!(reg & 0x00004000))
195 printk(KERN_DEBUG DRV_NAME " %s: UDMA not BIOS "
196 "enabled.\n", pci_name(dev));
197 reg |= 0x00004000; /* enable UDMA/33 support */
198 pci_write_config_dword(isa_dev, 0x64, reg);
202 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
203 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
204 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
205 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
207 /* Third Channel Test */
208 if (!(PCI_FUNC(dev->devfn) & 1)) {
209 struct pci_dev * findev = NULL;
211 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
212 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
214 pci_read_config_dword(findev, 0x4C, ®4c);
215 reg4c &= ~0x000007FF;
218 pci_write_config_dword(findev, 0x4C, reg4c);
221 outb_p(0x06, 0x0c00);
222 dev->irq = inb_p(0x0c01);
224 struct pci_dev * findev = NULL;
227 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
228 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
230 pci_read_config_byte(findev, 0x41, ®41);
232 pci_write_config_byte(findev, 0x41, reg41);
236 * This is a device pin issue on CSB6.
237 * Since there will be a future raid mode,
238 * early versions of the chipset require the
239 * interrupt pin to be set, and it is a compatibility
242 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
245 // pci_read_config_dword(dev, 0x40, &pioreg)
246 // pci_write_config_dword(dev, 0x40, 0x99999999);
247 // pci_read_config_dword(dev, 0x44, &dmareg);
248 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
249 /* setup the UDMA Control register
251 * 1. clear bit 6 to enable DMA
252 * 2. enable DMA modes with bits 0-1
256 * 11 : udma2/udma4/udma5
258 pci_read_config_byte(dev, 0x5A, &btr);
260 if (!(PCI_FUNC(dev->devfn) & 1))
263 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
264 pci_write_config_byte(dev, 0x5A, btr);
266 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
267 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
268 pci_read_config_byte(dev, 0x5A, &btr);
271 pci_write_config_byte(dev, 0x5A, btr);
277 static u8 ata66_svwks_svwks(ide_hwif_t *hwif)
279 return ATA_CBL_PATA80;
282 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
283 * of the subsystem device ID indicate presence of an 80-pin cable.
284 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
285 * Bit 15 set = secondary IDE channel has 80-pin cable.
286 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
287 * Bit 14 set = primary IDE channel has 80-pin cable.
289 static u8 ata66_svwks_dell(ide_hwif_t *hwif)
291 struct pci_dev *dev = to_pci_dev(hwif->dev);
293 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
294 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
295 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
296 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
297 return ((1 << (hwif->channel + 14)) &
298 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
299 return ATA_CBL_PATA40;
302 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
303 * detect issue by attaching the drives directly to the board.
304 * This check follows the Dell precedent (how scary is that?!)
306 * WARNING: this only works on Alpine hardware!
308 static u8 ata66_svwks_cobalt(ide_hwif_t *hwif)
310 struct pci_dev *dev = to_pci_dev(hwif->dev);
312 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
313 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
314 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
315 return ((1 << (hwif->channel + 14)) &
316 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
317 return ATA_CBL_PATA40;
320 static u8 svwks_cable_detect(ide_hwif_t *hwif)
322 struct pci_dev *dev = to_pci_dev(hwif->dev);
325 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
326 return ata66_svwks_svwks (hwif);
329 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
330 return ata66_svwks_dell (hwif);
333 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
334 return ata66_svwks_cobalt (hwif);
336 /* Per Specified Design by OEM, and ASIC Architect */
337 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
338 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
339 return ATA_CBL_PATA80;
341 return ATA_CBL_PATA40;
344 static const struct ide_port_ops osb4_port_ops = {
345 .set_pio_mode = svwks_set_pio_mode,
346 .set_dma_mode = svwks_set_dma_mode,
347 .udma_filter = svwks_udma_filter,
350 static const struct ide_port_ops svwks_port_ops = {
351 .set_pio_mode = svwks_set_pio_mode,
352 .set_dma_mode = svwks_set_dma_mode,
353 .udma_filter = svwks_udma_filter,
354 .cable_detect = svwks_cable_detect,
357 #define IDE_HFLAGS_SVWKS IDE_HFLAG_LEGACY_IRQS
359 static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
362 .init_chipset = init_chipset_svwks,
363 .port_ops = &osb4_port_ops,
364 .host_flags = IDE_HFLAGS_SVWKS,
365 .pio_mask = ATA_PIO4,
366 .mwdma_mask = ATA_MWDMA2,
367 .udma_mask = 0x00, /* UDMA is problematic on OSB4 */
371 .init_chipset = init_chipset_svwks,
372 .port_ops = &svwks_port_ops,
373 .host_flags = IDE_HFLAGS_SVWKS,
374 .pio_mask = ATA_PIO4,
375 .mwdma_mask = ATA_MWDMA2,
376 .udma_mask = ATA_UDMA5,
380 .init_chipset = init_chipset_svwks,
381 .port_ops = &svwks_port_ops,
382 .host_flags = IDE_HFLAGS_SVWKS,
383 .pio_mask = ATA_PIO4,
384 .mwdma_mask = ATA_MWDMA2,
385 .udma_mask = ATA_UDMA5,
389 .init_chipset = init_chipset_svwks,
390 .port_ops = &svwks_port_ops,
391 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
392 .pio_mask = ATA_PIO4,
393 .mwdma_mask = ATA_MWDMA2,
394 .udma_mask = ATA_UDMA5,
398 .init_chipset = init_chipset_svwks,
399 .port_ops = &svwks_port_ops,
400 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
401 .pio_mask = ATA_PIO4,
402 .mwdma_mask = ATA_MWDMA2,
403 .udma_mask = ATA_UDMA5,
408 * svwks_init_one - called when a OSB/CSB is found
409 * @dev: the svwks device
410 * @id: the matching pci id
412 * Called when the PCI registration layer (or the IDE initialization)
413 * finds a device matching our IDE device tables.
416 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
418 struct ide_port_info d;
419 u8 idx = id->driver_data;
421 d = serverworks_chipsets[idx];
424 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
425 else if (idx == 2 || idx == 3) {
426 if ((PCI_FUNC(dev->devfn) & 1) == 0) {
427 if (pci_resource_start(dev, 0) != 0x01f1)
428 d.host_flags |= IDE_HFLAG_NON_BOOTABLE;
429 d.host_flags |= IDE_HFLAG_SINGLE;
431 d.host_flags &= ~IDE_HFLAG_SINGLE;
434 return ide_pci_init_one(dev, &d, NULL);
437 static const struct pci_device_id svwks_pci_tbl[] = {
438 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0 },
439 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1 },
440 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2 },
441 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3 },
442 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
445 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
447 static struct pci_driver driver = {
448 .name = "Serverworks_IDE",
449 .id_table = svwks_pci_tbl,
450 .probe = svwks_init_one,
451 .remove = ide_pci_remove,
454 static int __init svwks_ide_init(void)
456 return ide_pci_register_driver(&driver);
459 static void __exit svwks_ide_exit(void)
461 pci_unregister_driver(&driver);
464 module_init(svwks_ide_init);
465 module_exit(svwks_ide_exit);
467 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
468 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
469 MODULE_LICENSE("GPL");