2 * pata_serverworks.c - Serverworks PATA for new ATA layer
9 * Copyright (C) 1998-2000 Michel Aubry
10 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
11 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
12 * Portions copyright (c) 2001 Sun Microsystems
15 * RCC/ServerWorks IDE driver for Linux
17 * OSB4: `Open South Bridge' IDE Interface (fn 1)
18 * supports UDMA mode 2 (33 MB/s)
20 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
21 * all revisions support UDMA mode 4 (66 MB/s)
22 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
24 * *** The CSB5 does not provide ANY register ***
25 * *** to detect 80-conductor cable presence. ***
27 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
30 * Available under NDA only. Errata info very hard to get.
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/pci.h>
36 #include <linux/init.h>
37 #include <linux/blkdev.h>
38 #include <linux/delay.h>
39 #include <scsi/scsi_host.h>
40 #include <linux/libata.h>
42 #define DRV_NAME "pata_serverworks"
43 #define DRV_VERSION "0.4.3"
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 */
51 static const char *csb_bad_ata100[] = {
60 * dell_cable - Dell serverworks cable detection
61 * @ap: ATA port to do cable detect
63 * Dell hide the 40/80 pin select for their interfaces in the top two
64 * bits of the subsystem ID.
67 static int dell_cable(struct ata_port *ap) {
68 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
70 if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
71 return ATA_CBL_PATA80;
72 return ATA_CBL_PATA40;
76 * sun_cable - Sun Cobalt 'Alpine' cable detection
77 * @ap: ATA port to do cable select
79 * Cobalt CSB5 IDE hides the 40/80pin in the top two bits of the
80 * subsystem ID the same as dell. We could use one function but we may
81 * need to extend the Dell one in future
84 static int sun_cable(struct ata_port *ap) {
85 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
87 if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
88 return ATA_CBL_PATA80;
89 return ATA_CBL_PATA40;
93 * osb4_cable - OSB4 cable detect
94 * @ap: ATA port to check
96 * The OSB4 isn't UDMA66 capable so this is easy
99 static int osb4_cable(struct ata_port *ap) {
100 return ATA_CBL_PATA40;
104 * csb_cable - CSB5/6 cable detect
105 * @ap: ATA port to check
107 * Serverworks default arrangement is to use the drive side detection
111 static int csb_cable(struct ata_port *ap) {
112 return ATA_CBL_PATA_UNK;
115 struct sv_cable_table {
118 int (*cable_detect)(struct ata_port *ap);
122 * Note that we don't copy the old serverworks code because the old
123 * code contains obvious mistakes
126 static struct sv_cable_table cable_detect[] = {
127 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, dell_cable },
128 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, dell_cable },
129 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, sun_cable },
130 { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, osb4_cable },
131 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, csb_cable },
132 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, csb_cable },
133 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, csb_cable },
134 { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, csb_cable },
139 * serverworks_cable_detect - cable detection
141 * @deadline: deadline jiffies for the operation
143 * Perform cable detection according to the device and subvendor
147 static int serverworks_cable_detect(struct ata_port *ap)
149 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
150 struct sv_cable_table *cb = cable_detect;
153 if (cb->device == pdev->device &&
154 (cb->subvendor == pdev->subsystem_vendor ||
155 cb->subvendor == PCI_ANY_ID)) {
156 return cb->cable_detect(ap);
162 return -1; /* kill compiler warning */
166 * serverworks_is_csb - Check for CSB or OSB
167 * @pdev: PCI device to check
169 * Returns true if the device being checked is known to be a CSB
173 static u8 serverworks_is_csb(struct pci_dev *pdev)
175 switch (pdev->device) {
176 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
177 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
178 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
179 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
188 * serverworks_osb4_filter - mode selection filter
190 * @mask: Mask of proposed modes
192 * Filter the offered modes for the device to apply controller
193 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
197 static unsigned long serverworks_osb4_filter(struct ata_device *adev, unsigned long mask)
199 if (adev->class == ATA_DEV_ATA)
200 mask &= ~ATA_MASK_UDMA;
201 return ata_bmdma_mode_filter(adev, mask);
206 * serverworks_csb_filter - mode selection filter
208 * @mask: Mask of proposed modes
210 * Check the blacklist and disable UDMA5 if matched
213 static unsigned long serverworks_csb_filter(struct ata_device *adev, unsigned long mask)
216 char model_num[ATA_ID_PROD_LEN + 1];
220 if (adev->class != ATA_DEV_ATA)
221 return ata_bmdma_mode_filter(adev, mask);
223 /* Actually do need to check */
224 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
226 for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
227 if (!strcmp(p, model_num))
228 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
230 return ata_bmdma_mode_filter(adev, mask);
234 * serverworks_set_piomode - set initial PIO mode data
238 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
239 * load is done as a simple lookup.
241 static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
243 static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
244 int offset = 1 + 2 * ap->port_no - adev->devno;
245 int devbits = (2 * ap->port_no + adev->devno) * 4;
247 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
248 int pio = adev->pio_mode - XFER_PIO_0;
250 pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
252 /* The OSB4 just requires the timing but the CSB series want the
253 mode number as well */
254 if (serverworks_is_csb(pdev)) {
255 pci_read_config_word(pdev, 0x4A, &csb5_pio);
256 csb5_pio &= ~(0x0F << devbits);
257 pci_write_config_byte(pdev, 0x4A, csb5_pio | (pio << devbits));
262 * serverworks_set_dmamode - set initial DMA mode data
266 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
267 * chipset. The MWDMA mode values are pulled from a lookup table
268 * while the chipset uses mode number for UDMA.
271 static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
273 static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
274 int offset = 1 + 2 * ap->port_no - adev->devno;
275 int devbits = 2 * ap->port_no + adev->devno;
278 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
280 pci_read_config_byte(pdev, 0x54, &ultra_cfg);
281 pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
282 ultra &= ~(0x0F << (adev->devno * 4));
284 if (adev->dma_mode >= XFER_UDMA_0) {
285 pci_write_config_byte(pdev, 0x44 + offset, 0x20);
287 ultra |= (adev->dma_mode - XFER_UDMA_0)
288 << (adev->devno * 4);
289 ultra_cfg |= (1 << devbits);
291 pci_write_config_byte(pdev, 0x44 + offset,
292 dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
293 ultra_cfg &= ~(1 << devbits);
295 pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
296 pci_write_config_byte(pdev, 0x54, ultra_cfg);
299 static struct scsi_host_template serverworks_sht = {
300 ATA_BMDMA_SHT(DRV_NAME),
303 static struct ata_port_operations serverworks_osb4_port_ops = {
304 .inherits = &ata_bmdma_port_ops,
305 .cable_detect = serverworks_cable_detect,
306 .mode_filter = serverworks_osb4_filter,
307 .set_piomode = serverworks_set_piomode,
308 .set_dmamode = serverworks_set_dmamode,
311 static struct ata_port_operations serverworks_csb_port_ops = {
312 .inherits = &serverworks_osb4_port_ops,
313 .mode_filter = serverworks_csb_filter,
316 static int serverworks_fixup_osb4(struct pci_dev *pdev)
319 struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
320 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
322 pci_read_config_dword(isa_dev, 0x64, ®);
323 reg &= ~0x00002000; /* disable 600ns interrupt mask */
324 if (!(reg & 0x00004000))
325 printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n");
326 reg |= 0x00004000; /* enable UDMA/33 support */
327 pci_write_config_dword(isa_dev, 0x64, reg);
328 pci_dev_put(isa_dev);
331 printk(KERN_WARNING "ata_serverworks: Unable to find bridge.\n");
335 static int serverworks_fixup_csb(struct pci_dev *pdev)
339 /* Third Channel Test */
340 if (!(PCI_FUNC(pdev->devfn) & 1)) {
341 struct pci_dev * findev = NULL;
343 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
344 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
346 pci_read_config_dword(findev, 0x4C, ®4c);
347 reg4c &= ~0x000007FF;
350 pci_write_config_dword(findev, 0x4C, reg4c);
354 struct pci_dev * findev = NULL;
357 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
358 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
360 pci_read_config_byte(findev, 0x41, ®41);
362 pci_write_config_byte(findev, 0x41, reg41);
366 /* setup the UDMA Control register
368 * 1. clear bit 6 to enable DMA
369 * 2. enable DMA modes with bits 0-1
373 * 11 : udma2/udma4/udma5
375 pci_read_config_byte(pdev, 0x5A, &btr);
377 if (!(PCI_FUNC(pdev->devfn) & 1))
380 btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
381 pci_write_config_byte(pdev, 0x5A, btr);
386 static void serverworks_fixup_ht1000(struct pci_dev *pdev)
389 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
390 pci_read_config_byte(pdev, 0x5A, &btr);
393 pci_write_config_byte(pdev, 0x5A, btr);
397 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
399 static const struct ata_port_info info[4] = {
401 .flags = ATA_FLAG_SLAVE_POSS,
405 .port_ops = &serverworks_osb4_port_ops
406 }, { /* OSB4 no UDMA */
407 .flags = ATA_FLAG_SLAVE_POSS,
411 .port_ops = &serverworks_osb4_port_ops
413 .flags = ATA_FLAG_SLAVE_POSS,
416 .udma_mask = ATA_UDMA4,
417 .port_ops = &serverworks_csb_port_ops
418 }, { /* CSB5 - later revisions*/
419 .flags = ATA_FLAG_SLAVE_POSS,
422 .udma_mask = ATA_UDMA5,
423 .port_ops = &serverworks_csb_port_ops
426 const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
429 rc = pcim_enable_device(pdev);
433 /* Force master latency timer to 64 PCI clocks */
434 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
436 /* OSB4 : South Bridge and IDE */
437 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
438 /* Select non UDMA capable OSB4 if we can't do fixups */
439 if ( serverworks_fixup_osb4(pdev) < 0)
442 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
443 else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
444 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
445 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
447 /* If the returned btr is the newer revision then
448 select the right info block */
449 if (serverworks_fixup_csb(pdev) == 3)
452 /* Is this the 3rd channel CSB6 IDE ? */
453 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
454 ppi[1] = &ata_dummy_port_info;
457 else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
458 serverworks_fixup_ht1000(pdev);
460 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
461 ata_pci_bmdma_clear_simplex(pdev);
463 return ata_pci_sff_init_one(pdev, ppi, &serverworks_sht, NULL);
467 static int serverworks_reinit_one(struct pci_dev *pdev)
469 struct ata_host *host = dev_get_drvdata(&pdev->dev);
472 rc = ata_pci_device_do_resume(pdev);
476 /* Force master latency timer to 64 PCI clocks */
477 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
479 switch (pdev->device) {
480 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
481 serverworks_fixup_osb4(pdev);
483 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
484 ata_pci_bmdma_clear_simplex(pdev);
486 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
487 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
488 serverworks_fixup_csb(pdev);
490 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
491 serverworks_fixup_ht1000(pdev);
495 ata_host_resume(host);
500 static const struct pci_device_id serverworks[] = {
501 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
502 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
503 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
504 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
505 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
510 static struct pci_driver serverworks_pci_driver = {
512 .id_table = serverworks,
513 .probe = serverworks_init_one,
514 .remove = ata_pci_remove_one,
516 .suspend = ata_pci_device_suspend,
517 .resume = serverworks_reinit_one,
521 static int __init serverworks_init(void)
523 return pci_register_driver(&serverworks_pci_driver);
526 static void __exit serverworks_exit(void)
528 pci_unregister_driver(&serverworks_pci_driver);
531 MODULE_AUTHOR("Alan Cox");
532 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
533 MODULE_LICENSE("GPL");
534 MODULE_DEVICE_TABLE(pci, serverworks);
535 MODULE_VERSION(DRV_VERSION);
537 module_init(serverworks_init);
538 module_exit(serverworks_exit);