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/ide.h>
36 #include <linux/init.h>
40 #define DRV_NAME "serverworks"
42 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
43 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
45 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
46 * can overrun their FIFOs when used with the CSB5 */
47 static const char *svwks_bad_ata100[] = {
55 static struct pci_dev *isa_dev;
57 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
59 char *m = (char *)&drive->id[ATA_ID_PROD];
62 if (!strcmp(*list++, m))
67 static u8 svwks_udma_filter(ide_drive_t *drive)
69 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
72 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
74 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
77 pci_read_config_dword(isa_dev, 0x64, ®);
80 * Don't enable UDMA on disk devices for the moment
82 if(drive->media == ide_disk)
84 /* Check the OSB4 DMA33 enable bit */
85 return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
86 } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
88 } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
90 pci_read_config_byte(dev, 0x5A, &btr);
93 /* If someone decides to do UDMA133 on CSB5 the same
94 issue will bite so be inclusive */
95 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
99 case 3: mask = 0x3f; break;
100 case 2: mask = 0x1f; break;
101 case 1: mask = 0x07; break;
102 default: mask = 0x00; break;
105 if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
106 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
107 (!(PCI_FUNC(dev->devfn) & 1)))
113 static u8 svwks_csb_check (struct pci_dev *dev)
115 switch (dev->device) {
116 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
117 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
118 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
119 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
127 static void svwks_set_pio_mode(ide_drive_t *drive, const u8 pio)
129 static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
130 static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
132 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
134 pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
136 if (svwks_csb_check(dev)) {
139 pci_read_config_word(dev, 0x4a, &csb_pio);
141 csb_pio &= ~(0x0f << (4 * drive->dn));
142 csb_pio |= (pio << (4 * drive->dn));
144 pci_write_config_word(dev, 0x4a, csb_pio);
148 static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
150 static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
151 static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
152 static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };
154 ide_hwif_t *hwif = HWIF(drive);
155 struct pci_dev *dev = to_pci_dev(hwif->dev);
156 u8 unit = drive->dn & 1;
158 u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0;
160 pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
161 pci_read_config_byte(dev, 0x54, &ultra_enable);
163 ultra_timing &= ~(0x0F << (4*unit));
164 ultra_enable &= ~(0x01 << drive->dn);
166 if (speed >= XFER_UDMA_0) {
167 dma_timing |= dma_modes[2];
168 ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
169 ultra_enable |= (0x01 << drive->dn);
170 } else if (speed >= XFER_MW_DMA_0)
171 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
173 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
174 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
175 pci_write_config_byte(dev, 0x54, ultra_enable);
178 static unsigned int init_chipset_svwks(struct pci_dev *dev)
183 /* force Master Latency Timer value to 64 PCICLKs */
184 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
186 /* OSB4 : South Bridge and IDE */
187 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
188 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
189 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
191 pci_read_config_dword(isa_dev, 0x64, ®);
192 reg &= ~0x00002000; /* disable 600ns interrupt mask */
193 if(!(reg & 0x00004000))
194 printk(KERN_DEBUG DRV_NAME " %s: UDMA not BIOS "
195 "enabled.\n", pci_name(dev));
196 reg |= 0x00004000; /* enable UDMA/33 support */
197 pci_write_config_dword(isa_dev, 0x64, reg);
201 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
202 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
203 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
204 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
206 /* Third Channel Test */
207 if (!(PCI_FUNC(dev->devfn) & 1)) {
208 struct pci_dev * findev = NULL;
210 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
211 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
213 pci_read_config_dword(findev, 0x4C, ®4c);
214 reg4c &= ~0x000007FF;
217 pci_write_config_dword(findev, 0x4C, reg4c);
220 outb_p(0x06, 0x0c00);
221 dev->irq = inb_p(0x0c01);
223 struct pci_dev * findev = NULL;
226 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
227 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
229 pci_read_config_byte(findev, 0x41, ®41);
231 pci_write_config_byte(findev, 0x41, reg41);
235 * This is a device pin issue on CSB6.
236 * Since there will be a future raid mode,
237 * early versions of the chipset require the
238 * interrupt pin to be set, and it is a compatibility
241 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
244 // pci_read_config_dword(dev, 0x40, &pioreg)
245 // pci_write_config_dword(dev, 0x40, 0x99999999);
246 // pci_read_config_dword(dev, 0x44, &dmareg);
247 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
248 /* setup the UDMA Control register
250 * 1. clear bit 6 to enable DMA
251 * 2. enable DMA modes with bits 0-1
255 * 11 : udma2/udma4/udma5
257 pci_read_config_byte(dev, 0x5A, &btr);
259 if (!(PCI_FUNC(dev->devfn) & 1))
262 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
263 pci_write_config_byte(dev, 0x5A, btr);
265 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
266 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
267 pci_read_config_byte(dev, 0x5A, &btr);
270 pci_write_config_byte(dev, 0x5A, btr);
276 static u8 ata66_svwks_svwks(ide_hwif_t *hwif)
278 return ATA_CBL_PATA80;
281 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
282 * of the subsystem device ID indicate presence of an 80-pin cable.
283 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
284 * Bit 15 set = secondary IDE channel has 80-pin cable.
285 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
286 * Bit 14 set = primary IDE channel has 80-pin cable.
288 static u8 ata66_svwks_dell(ide_hwif_t *hwif)
290 struct pci_dev *dev = to_pci_dev(hwif->dev);
292 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
293 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
294 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
295 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
296 return ((1 << (hwif->channel + 14)) &
297 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
298 return ATA_CBL_PATA40;
301 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
302 * detect issue by attaching the drives directly to the board.
303 * This check follows the Dell precedent (how scary is that?!)
305 * WARNING: this only works on Alpine hardware!
307 static u8 ata66_svwks_cobalt(ide_hwif_t *hwif)
309 struct pci_dev *dev = to_pci_dev(hwif->dev);
311 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
312 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
313 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
314 return ((1 << (hwif->channel + 14)) &
315 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
316 return ATA_CBL_PATA40;
319 static u8 svwks_cable_detect(ide_hwif_t *hwif)
321 struct pci_dev *dev = to_pci_dev(hwif->dev);
324 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
325 return ata66_svwks_svwks (hwif);
328 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
329 return ata66_svwks_dell (hwif);
332 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
333 return ata66_svwks_cobalt (hwif);
335 /* Per Specified Design by OEM, and ASIC Architect */
336 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
337 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
338 return ATA_CBL_PATA80;
340 return ATA_CBL_PATA40;
343 static const struct ide_port_ops osb4_port_ops = {
344 .set_pio_mode = svwks_set_pio_mode,
345 .set_dma_mode = svwks_set_dma_mode,
346 .udma_filter = svwks_udma_filter,
349 static const struct ide_port_ops svwks_port_ops = {
350 .set_pio_mode = svwks_set_pio_mode,
351 .set_dma_mode = svwks_set_dma_mode,
352 .udma_filter = svwks_udma_filter,
353 .cable_detect = svwks_cable_detect,
356 #define IDE_HFLAGS_SVWKS IDE_HFLAG_LEGACY_IRQS
358 static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
361 .init_chipset = init_chipset_svwks,
362 .port_ops = &osb4_port_ops,
363 .host_flags = IDE_HFLAGS_SVWKS,
364 .pio_mask = ATA_PIO4,
365 .mwdma_mask = ATA_MWDMA2,
366 .udma_mask = 0x00, /* UDMA is problematic on OSB4 */
370 .init_chipset = init_chipset_svwks,
371 .port_ops = &svwks_port_ops,
372 .host_flags = IDE_HFLAGS_SVWKS,
373 .pio_mask = ATA_PIO4,
374 .mwdma_mask = ATA_MWDMA2,
375 .udma_mask = ATA_UDMA5,
379 .init_chipset = init_chipset_svwks,
380 .port_ops = &svwks_port_ops,
381 .host_flags = IDE_HFLAGS_SVWKS,
382 .pio_mask = ATA_PIO4,
383 .mwdma_mask = ATA_MWDMA2,
384 .udma_mask = ATA_UDMA5,
388 .init_chipset = init_chipset_svwks,
389 .port_ops = &svwks_port_ops,
390 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
391 .pio_mask = ATA_PIO4,
392 .mwdma_mask = ATA_MWDMA2,
393 .udma_mask = ATA_UDMA5,
397 .init_chipset = init_chipset_svwks,
398 .port_ops = &svwks_port_ops,
399 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
400 .pio_mask = ATA_PIO4,
401 .mwdma_mask = ATA_MWDMA2,
402 .udma_mask = ATA_UDMA5,
407 * svwks_init_one - called when a OSB/CSB is found
408 * @dev: the svwks device
409 * @id: the matching pci id
411 * Called when the PCI registration layer (or the IDE initialization)
412 * finds a device matching our IDE device tables.
415 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
417 struct ide_port_info d;
418 u8 idx = id->driver_data;
420 d = serverworks_chipsets[idx];
423 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
424 else if (idx == 2 || idx == 3) {
425 if ((PCI_FUNC(dev->devfn) & 1) == 0) {
426 if (pci_resource_start(dev, 0) != 0x01f1)
427 d.host_flags |= IDE_HFLAG_NON_BOOTABLE;
428 d.host_flags |= IDE_HFLAG_SINGLE;
430 d.host_flags &= ~IDE_HFLAG_SINGLE;
433 return ide_pci_init_one(dev, &d, NULL);
436 static const struct pci_device_id svwks_pci_tbl[] = {
437 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0 },
438 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1 },
439 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2 },
440 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3 },
441 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
444 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
446 static struct pci_driver svwks_pci_driver = {
447 .name = "Serverworks_IDE",
448 .id_table = svwks_pci_tbl,
449 .probe = svwks_init_one,
450 .remove = ide_pci_remove,
451 .suspend = ide_pci_suspend,
452 .resume = ide_pci_resume,
455 static int __init svwks_ide_init(void)
457 return ide_pci_register_driver(&svwks_pci_driver);
460 static void __exit svwks_ide_exit(void)
462 pci_unregister_driver(&svwks_pci_driver);
465 module_init(svwks_ide_init);
466 module_exit(svwks_ide_exit);
468 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
469 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
470 MODULE_LICENSE("GPL");