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/ioport.h>
35 #include <linux/pci.h>
36 #include <linux/hdreg.h>
37 #include <linux/ide.h>
38 #include <linux/init.h>
39 #include <linux/delay.h>
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)
61 if (!strcmp(*list++, drive->id->model))
66 static u8 svwks_udma_filter(ide_drive_t *drive)
68 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
71 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
73 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
76 pci_read_config_dword(isa_dev, 0x64, ®);
79 * Don't enable UDMA on disk devices for the moment
81 if(drive->media == ide_disk)
83 /* Check the OSB4 DMA33 enable bit */
84 return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
85 } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
87 } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
89 pci_read_config_byte(dev, 0x5A, &btr);
92 /* If someone decides to do UDMA133 on CSB5 the same
93 issue will bite so be inclusive */
94 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
98 case 3: mask = 0x3f; break;
99 case 2: mask = 0x1f; break;
100 case 1: mask = 0x07; break;
101 default: mask = 0x00; break;
104 if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
105 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
106 (!(PCI_FUNC(dev->devfn) & 1)))
112 static u8 svwks_csb_check (struct pci_dev *dev)
114 switch (dev->device) {
115 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
116 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
117 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
118 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
126 static void svwks_set_pio_mode(ide_drive_t *drive, const u8 pio)
128 static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
129 static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
131 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
133 pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
135 if (svwks_csb_check(dev)) {
138 pci_read_config_word(dev, 0x4a, &csb_pio);
140 csb_pio &= ~(0x0f << (4 * drive->dn));
141 csb_pio |= (pio << (4 * drive->dn));
143 pci_write_config_word(dev, 0x4a, csb_pio);
147 static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
149 static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
150 static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
151 static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };
153 ide_hwif_t *hwif = HWIF(drive);
154 struct pci_dev *dev = to_pci_dev(hwif->dev);
155 u8 unit = (drive->select.b.unit & 0x01);
157 u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0;
159 pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
160 pci_read_config_byte(dev, 0x54, &ultra_enable);
162 ultra_timing &= ~(0x0F << (4*unit));
163 ultra_enable &= ~(0x01 << drive->dn);
165 if (speed >= XFER_UDMA_0) {
166 dma_timing |= dma_modes[2];
167 ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
168 ultra_enable |= (0x01 << drive->dn);
169 } else if (speed >= XFER_MW_DMA_0)
170 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
172 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
173 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
174 pci_write_config_byte(dev, 0x54, ultra_enable);
177 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
182 /* force Master Latency Timer value to 64 PCICLKs */
183 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
185 /* OSB4 : South Bridge and IDE */
186 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
187 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
188 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
190 pci_read_config_dword(isa_dev, 0x64, ®);
191 reg &= ~0x00002000; /* disable 600ns interrupt mask */
192 if(!(reg & 0x00004000))
193 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
194 reg |= 0x00004000; /* enable UDMA/33 support */
195 pci_write_config_dword(isa_dev, 0x64, reg);
199 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
200 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
201 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
202 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
204 /* Third Channel Test */
205 if (!(PCI_FUNC(dev->devfn) & 1)) {
206 struct pci_dev * findev = NULL;
208 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
209 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
211 pci_read_config_dword(findev, 0x4C, ®4c);
212 reg4c &= ~0x000007FF;
215 pci_write_config_dword(findev, 0x4C, reg4c);
218 outb_p(0x06, 0x0c00);
219 dev->irq = inb_p(0x0c01);
221 struct pci_dev * findev = NULL;
224 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
225 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
227 pci_read_config_byte(findev, 0x41, ®41);
229 pci_write_config_byte(findev, 0x41, reg41);
233 * This is a device pin issue on CSB6.
234 * Since there will be a future raid mode,
235 * early versions of the chipset require the
236 * interrupt pin to be set, and it is a compatibility
239 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
242 // pci_read_config_dword(dev, 0x40, &pioreg)
243 // pci_write_config_dword(dev, 0x40, 0x99999999);
244 // pci_read_config_dword(dev, 0x44, &dmareg);
245 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
246 /* setup the UDMA Control register
248 * 1. clear bit 6 to enable DMA
249 * 2. enable DMA modes with bits 0-1
253 * 11 : udma2/udma4/udma5
255 pci_read_config_byte(dev, 0x5A, &btr);
257 if (!(PCI_FUNC(dev->devfn) & 1))
260 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
261 pci_write_config_byte(dev, 0x5A, btr);
263 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
264 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
265 pci_read_config_byte(dev, 0x5A, &btr);
268 pci_write_config_byte(dev, 0x5A, btr);
274 static u8 __devinit ata66_svwks_svwks(ide_hwif_t *hwif)
276 return ATA_CBL_PATA80;
279 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
280 * of the subsystem device ID indicate presence of an 80-pin cable.
281 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
282 * Bit 15 set = secondary IDE channel has 80-pin cable.
283 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
284 * Bit 14 set = primary IDE channel has 80-pin cable.
286 static u8 __devinit ata66_svwks_dell(ide_hwif_t *hwif)
288 struct pci_dev *dev = to_pci_dev(hwif->dev);
290 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
291 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
292 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
293 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
294 return ((1 << (hwif->channel + 14)) &
295 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
296 return ATA_CBL_PATA40;
299 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
300 * detect issue by attaching the drives directly to the board.
301 * This check follows the Dell precedent (how scary is that?!)
303 * WARNING: this only works on Alpine hardware!
305 static u8 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif)
307 struct pci_dev *dev = to_pci_dev(hwif->dev);
309 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
310 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
311 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
312 return ((1 << (hwif->channel + 14)) &
313 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
314 return ATA_CBL_PATA40;
317 static u8 __devinit ata66_svwks(ide_hwif_t *hwif)
319 struct pci_dev *dev = to_pci_dev(hwif->dev);
322 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
323 return ata66_svwks_svwks (hwif);
326 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
327 return ata66_svwks_dell (hwif);
330 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
331 return ata66_svwks_cobalt (hwif);
333 /* Per Specified Design by OEM, and ASIC Architect */
334 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
335 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
336 return ATA_CBL_PATA80;
338 return ATA_CBL_PATA40;
341 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
343 struct pci_dev *dev = to_pci_dev(hwif->dev);
345 hwif->set_pio_mode = &svwks_set_pio_mode;
346 hwif->set_dma_mode = &svwks_set_dma_mode;
347 hwif->udma_filter = &svwks_udma_filter;
352 if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
353 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
354 hwif->cbl = ata66_svwks(hwif);
358 #define IDE_HFLAGS_SVWKS \
359 (IDE_HFLAG_LEGACY_IRQS | \
360 IDE_HFLAG_ABUSE_SET_DMA_MODE | \
363 static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
365 .name = "SvrWks OSB4",
366 .init_chipset = init_chipset_svwks,
367 .init_hwif = init_hwif_svwks,
368 .host_flags = IDE_HFLAGS_SVWKS,
369 .pio_mask = ATA_PIO4,
370 .mwdma_mask = ATA_MWDMA2,
371 .udma_mask = 0x00, /* UDMA is problematic on OSB4 */
373 .name = "SvrWks CSB5",
374 .init_chipset = init_chipset_svwks,
375 .init_hwif = init_hwif_svwks,
376 .host_flags = IDE_HFLAGS_SVWKS,
377 .pio_mask = ATA_PIO4,
378 .mwdma_mask = ATA_MWDMA2,
379 .udma_mask = ATA_UDMA5,
381 .name = "SvrWks CSB6",
382 .init_chipset = init_chipset_svwks,
383 .init_hwif = init_hwif_svwks,
384 .host_flags = IDE_HFLAGS_SVWKS,
385 .pio_mask = ATA_PIO4,
386 .mwdma_mask = ATA_MWDMA2,
387 .udma_mask = ATA_UDMA5,
389 .name = "SvrWks CSB6",
390 .init_chipset = init_chipset_svwks,
391 .init_hwif = init_hwif_svwks,
392 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
393 .pio_mask = ATA_PIO4,
394 .mwdma_mask = ATA_MWDMA2,
395 .udma_mask = ATA_UDMA5,
397 .name = "SvrWks HT1000",
398 .init_chipset = init_chipset_svwks,
399 .init_hwif = init_hwif_svwks,
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_BOOTABLE;
429 d.host_flags |= IDE_HFLAG_SINGLE;
431 d.host_flags &= ~IDE_HFLAG_SINGLE;
434 return ide_setup_pci_device(dev, &d);
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,
453 static int __init svwks_ide_init(void)
455 return ide_pci_register_driver(&driver);
458 module_init(svwks_ide_init);
460 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
461 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
462 MODULE_LICENSE("GPL");