2 * pata_serverworks.c - Serverworks PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
10 * Copyright (C) 1998-2000 Michel Aubry
11 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
12 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
13 * Portions copyright (c) 2001 Sun Microsystems
16 * RCC/ServerWorks IDE driver for Linux
18 * OSB4: `Open South Bridge' IDE Interface (fn 1)
19 * supports UDMA mode 2 (33 MB/s)
21 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
22 * all revisions support UDMA mode 4 (66 MB/s)
23 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
25 * *** The CSB5 does not provide ANY register ***
26 * *** to detect 80-conductor cable presence. ***
28 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
31 * Available under NDA only. Errata info very hard to get.
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/init.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <scsi/scsi_host.h>
41 #include <linux/libata.h>
43 #define DRV_NAME "pata_serverworks"
44 #define DRV_VERSION "0.4.3"
46 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
47 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
49 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
50 * can overrun their FIFOs when used with the CSB5 */
52 static const char *csb_bad_ata100[] = {
61 * dell_cable - Dell serverworks cable detection
62 * @ap: ATA port to do cable detect
64 * Dell hide the 40/80 pin select for their interfaces in the top two
65 * bits of the subsystem ID.
68 static int dell_cable(struct ata_port *ap) {
69 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
71 if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
72 return ATA_CBL_PATA80;
73 return ATA_CBL_PATA40;
77 * sun_cable - Sun Cobalt 'Alpine' cable detection
78 * @ap: ATA port to do cable select
80 * Cobalt CSB5 IDE hides the 40/80pin in the top two bits of the
81 * subsystem ID the same as dell. We could use one function but we may
82 * need to extend the Dell one in future
85 static int sun_cable(struct ata_port *ap) {
86 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
88 if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
89 return ATA_CBL_PATA80;
90 return ATA_CBL_PATA40;
94 * osb4_cable - OSB4 cable detect
95 * @ap: ATA port to check
97 * The OSB4 isn't UDMA66 capable so this is easy
100 static int osb4_cable(struct ata_port *ap) {
101 return ATA_CBL_PATA40;
105 * csb_cable - CSB5/6 cable detect
106 * @ap: ATA port to check
108 * Serverworks default arrangement is to use the drive side detection
112 static int csb_cable(struct ata_port *ap) {
113 return ATA_CBL_PATA_UNK;
116 struct sv_cable_table {
119 int (*cable_detect)(struct ata_port *ap);
123 * Note that we don't copy the old serverworks code because the old
124 * code contains obvious mistakes
127 static struct sv_cable_table cable_detect[] = {
128 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, dell_cable },
129 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, dell_cable },
130 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, sun_cable },
131 { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, osb4_cable },
132 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, csb_cable },
133 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, csb_cable },
134 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, csb_cable },
135 { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, csb_cable },
140 * serverworks_cable_detect - cable detection
142 * @deadline: deadline jiffies for the operation
144 * Perform cable detection according to the device and subvendor
148 static int serverworks_cable_detect(struct ata_port *ap)
150 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
151 struct sv_cable_table *cb = cable_detect;
154 if (cb->device == pdev->device &&
155 (cb->subvendor == pdev->subsystem_vendor ||
156 cb->subvendor == PCI_ANY_ID)) {
157 return cb->cable_detect(ap);
163 return -1; /* kill compiler warning */
167 * serverworks_is_csb - Check for CSB or OSB
168 * @pdev: PCI device to check
170 * Returns true if the device being checked is known to be a CSB
174 static u8 serverworks_is_csb(struct pci_dev *pdev)
176 switch (pdev->device) {
177 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
178 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
179 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
180 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
189 * serverworks_osb4_filter - mode selection filter
191 * @mask: Mask of proposed modes
193 * Filter the offered modes for the device to apply controller
194 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
198 static unsigned long serverworks_osb4_filter(struct ata_device *adev, unsigned long mask)
200 if (adev->class == ATA_DEV_ATA)
201 mask &= ~ATA_MASK_UDMA;
202 return ata_bmdma_mode_filter(adev, mask);
207 * serverworks_csb_filter - mode selection filter
209 * @mask: Mask of proposed modes
211 * Check the blacklist and disable UDMA5 if matched
214 static unsigned long serverworks_csb_filter(struct ata_device *adev, unsigned long mask)
217 char model_num[ATA_ID_PROD_LEN + 1];
221 if (adev->class != ATA_DEV_ATA)
222 return ata_bmdma_mode_filter(adev, mask);
224 /* Actually do need to check */
225 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
227 for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
228 if (!strcmp(p, model_num))
229 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
231 return ata_bmdma_mode_filter(adev, mask);
235 * serverworks_set_piomode - set initial PIO mode data
239 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
240 * load is done as a simple lookup.
242 static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
244 static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
245 int offset = 1 + 2 * ap->port_no - adev->devno;
246 int devbits = (2 * ap->port_no + adev->devno) * 4;
248 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
249 int pio = adev->pio_mode - XFER_PIO_0;
251 pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
253 /* The OSB4 just requires the timing but the CSB series want the
254 mode number as well */
255 if (serverworks_is_csb(pdev)) {
256 pci_read_config_word(pdev, 0x4A, &csb5_pio);
257 csb5_pio &= ~(0x0F << devbits);
258 pci_write_config_byte(pdev, 0x4A, csb5_pio | (pio << devbits));
263 * serverworks_set_dmamode - set initial DMA mode data
267 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
268 * chipset. The MWDMA mode values are pulled from a lookup table
269 * while the chipset uses mode number for UDMA.
272 static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
274 static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
275 int offset = 1 + 2 * ap->port_no - adev->devno;
276 int devbits = 2 * ap->port_no + adev->devno;
279 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
281 pci_read_config_byte(pdev, 0x54, &ultra_cfg);
282 pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
283 ultra &= ~(0x0F << (adev->devno * 4));
285 if (adev->dma_mode >= XFER_UDMA_0) {
286 pci_write_config_byte(pdev, 0x44 + offset, 0x20);
288 ultra |= (adev->dma_mode - XFER_UDMA_0)
289 << (adev->devno * 4);
290 ultra_cfg |= (1 << devbits);
292 pci_write_config_byte(pdev, 0x44 + offset,
293 dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
294 ultra_cfg &= ~(1 << devbits);
296 pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
297 pci_write_config_byte(pdev, 0x54, ultra_cfg);
300 static struct scsi_host_template serverworks_sht = {
301 ATA_BMDMA_SHT(DRV_NAME),
304 static struct ata_port_operations serverworks_osb4_port_ops = {
305 .inherits = &ata_bmdma_port_ops,
306 .cable_detect = serverworks_cable_detect,
307 .mode_filter = serverworks_osb4_filter,
308 .set_piomode = serverworks_set_piomode,
309 .set_dmamode = serverworks_set_dmamode,
312 static struct ata_port_operations serverworks_csb_port_ops = {
313 .inherits = &serverworks_osb4_port_ops,
314 .mode_filter = serverworks_csb_filter,
317 static int serverworks_fixup_osb4(struct pci_dev *pdev)
320 struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
321 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
323 pci_read_config_dword(isa_dev, 0x64, ®);
324 reg &= ~0x00002000; /* disable 600ns interrupt mask */
325 if (!(reg & 0x00004000))
326 printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n");
327 reg |= 0x00004000; /* enable UDMA/33 support */
328 pci_write_config_dword(isa_dev, 0x64, reg);
329 pci_dev_put(isa_dev);
332 printk(KERN_WARNING "ata_serverworks: Unable to find bridge.\n");
336 static int serverworks_fixup_csb(struct pci_dev *pdev)
340 /* Third Channel Test */
341 if (!(PCI_FUNC(pdev->devfn) & 1)) {
342 struct pci_dev * findev = NULL;
344 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
345 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
347 pci_read_config_dword(findev, 0x4C, ®4c);
348 reg4c &= ~0x000007FF;
351 pci_write_config_dword(findev, 0x4C, reg4c);
355 struct pci_dev * findev = NULL;
358 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
359 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
361 pci_read_config_byte(findev, 0x41, ®41);
363 pci_write_config_byte(findev, 0x41, reg41);
367 /* setup the UDMA Control register
369 * 1. clear bit 6 to enable DMA
370 * 2. enable DMA modes with bits 0-1
374 * 11 : udma2/udma4/udma5
376 pci_read_config_byte(pdev, 0x5A, &btr);
378 if (!(PCI_FUNC(pdev->devfn) & 1))
381 btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
382 pci_write_config_byte(pdev, 0x5A, btr);
387 static void serverworks_fixup_ht1000(struct pci_dev *pdev)
390 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
391 pci_read_config_byte(pdev, 0x5A, &btr);
394 pci_write_config_byte(pdev, 0x5A, btr);
398 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
400 static const struct ata_port_info info[4] = {
402 .flags = ATA_FLAG_SLAVE_POSS,
406 .port_ops = &serverworks_osb4_port_ops
407 }, { /* OSB4 no UDMA */
408 .flags = ATA_FLAG_SLAVE_POSS,
412 .port_ops = &serverworks_osb4_port_ops
414 .flags = ATA_FLAG_SLAVE_POSS,
417 .udma_mask = ATA_UDMA4,
418 .port_ops = &serverworks_csb_port_ops
419 }, { /* CSB5 - later revisions*/
420 .flags = ATA_FLAG_SLAVE_POSS,
423 .udma_mask = ATA_UDMA5,
424 .port_ops = &serverworks_csb_port_ops
427 const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
430 rc = pcim_enable_device(pdev);
434 /* Force master latency timer to 64 PCI clocks */
435 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
437 /* OSB4 : South Bridge and IDE */
438 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
439 /* Select non UDMA capable OSB4 if we can't do fixups */
440 if ( serverworks_fixup_osb4(pdev) < 0)
443 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
444 else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
445 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
446 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
448 /* If the returned btr is the newer revision then
449 select the right info block */
450 if (serverworks_fixup_csb(pdev) == 3)
453 /* Is this the 3rd channel CSB6 IDE ? */
454 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
455 ppi[1] = &ata_dummy_port_info;
458 else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
459 serverworks_fixup_ht1000(pdev);
461 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
462 ata_pci_bmdma_clear_simplex(pdev);
464 return ata_pci_sff_init_one(pdev, ppi, &serverworks_sht, NULL);
468 static int serverworks_reinit_one(struct pci_dev *pdev)
470 struct ata_host *host = dev_get_drvdata(&pdev->dev);
473 rc = ata_pci_device_do_resume(pdev);
477 /* Force master latency timer to 64 PCI clocks */
478 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
480 switch (pdev->device) {
481 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
482 serverworks_fixup_osb4(pdev);
484 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
485 ata_pci_bmdma_clear_simplex(pdev);
487 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
488 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
489 serverworks_fixup_csb(pdev);
491 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
492 serverworks_fixup_ht1000(pdev);
496 ata_host_resume(host);
501 static const struct pci_device_id serverworks[] = {
502 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
503 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
504 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
505 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
506 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
511 static struct pci_driver serverworks_pci_driver = {
513 .id_table = serverworks,
514 .probe = serverworks_init_one,
515 .remove = ata_pci_remove_one,
517 .suspend = ata_pci_device_suspend,
518 .resume = serverworks_reinit_one,
522 static int __init serverworks_init(void)
524 return pci_register_driver(&serverworks_pci_driver);
527 static void __exit serverworks_exit(void)
529 pci_unregister_driver(&serverworks_pci_driver);
532 MODULE_AUTHOR("Alan Cox");
533 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
534 MODULE_LICENSE("GPL");
535 MODULE_DEVICE_TABLE(pci, serverworks);
536 MODULE_VERSION(DRV_VERSION);
538 module_init(serverworks_init);
539 module_exit(serverworks_exit);