2 * ata-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 "0.3.7"
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 * csb4_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_PATA80;
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_pre_reset - cable detection
143 * Perform cable detection according to the device and subvendor
147 static int serverworks_pre_reset(struct ata_port *ap) {
148 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
149 struct sv_cable_table *cb = cable_detect;
152 if (cb->device == pdev->device &&
153 (cb->subvendor == pdev->subsystem_vendor ||
154 cb->subvendor == PCI_ANY_ID)) {
155 ap->cbl = cb->cable_detect(ap);
156 return ata_std_prereset(ap);
162 return -1; /* kill compiler warning */
165 static void serverworks_error_handler(struct ata_port *ap)
167 return ata_bmdma_drive_eh(ap, serverworks_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
171 * serverworks_is_csb - Check for CSB or OSB
172 * @pdev: PCI device to check
174 * Returns true if the device being checked is known to be a CSB
178 static u8 serverworks_is_csb(struct pci_dev *pdev)
180 switch (pdev->device) {
181 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
182 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
183 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
184 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
193 * serverworks_osb4_filter - mode selection filter
197 * Filter the offered modes for the device to apply controller
198 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
202 static unsigned long serverworks_osb4_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask)
204 if (adev->class == ATA_DEV_ATA)
205 mask &= ~ATA_MASK_UDMA;
206 return ata_pci_default_filter(ap, adev, mask);
211 * serverworks_csb_filter - mode selection filter
215 * Check the blacklist and disable UDMA5 if matched
218 static unsigned long serverworks_csb_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask)
225 if (adev->class != ATA_DEV_ATA)
226 return ata_pci_default_filter(ap, adev, mask);
228 /* Actually do need to check */
229 ata_id_string(adev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
230 /* Precuationary - why not do this in the libata core ?? */
232 len = strlen(model_num);
233 while ((len > 0) && (model_num[len - 1] == ' ')) {
238 for(i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
239 if (!strncmp(p, model_num, len))
240 mask &= ~(0x1F << ATA_SHIFT_UDMA);
242 return ata_pci_default_filter(ap, adev, mask);
247 * serverworks_set_piomode - set initial PIO mode data
251 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
252 * load is done as a simple lookup.
254 static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
256 static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
257 int offset = 1 + (2 * ap->port_no) - adev->devno;
258 int devbits = (2 * ap->port_no + adev->devno) * 4;
260 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
261 int pio = adev->pio_mode - XFER_PIO_0;
263 pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
265 /* The OSB4 just requires the timing but the CSB series want the
266 mode number as well */
267 if (serverworks_is_csb(pdev)) {
268 pci_read_config_word(pdev, 0x4A, &csb5_pio);
269 csb5_pio &= ~(0x0F << devbits);
270 pci_write_config_byte(pdev, 0x4A, csb5_pio | (pio << devbits));
275 * serverworks_set_dmamode - set initial DMA mode data
279 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
280 * chipset. The MWDMA mode values are pulled from a lookup table
281 * while the chipset uses mode number for UDMA.
284 static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
286 static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
287 int offset = 1 + 2 * ap->port_no - adev->devno;
288 int devbits = (2 * ap->port_no + adev->devno);
291 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
293 pci_read_config_byte(pdev, 0x54, &ultra_cfg);
295 if (adev->dma_mode >= XFER_UDMA_0) {
296 pci_write_config_byte(pdev, 0x44 + offset, 0x20);
298 pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
299 ultra &= ~(0x0F << (ap->port_no * 4));
300 ultra |= (adev->dma_mode - XFER_UDMA_0)
301 << (ap->port_no * 4);
302 pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
304 ultra_cfg |= (1 << devbits);
306 pci_write_config_byte(pdev, 0x44 + offset,
307 dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
308 ultra_cfg &= ~(1 << devbits);
310 pci_write_config_byte(pdev, 0x54, ultra_cfg);
313 static struct scsi_host_template serverworks_sht = {
314 .module = THIS_MODULE,
316 .ioctl = ata_scsi_ioctl,
317 .queuecommand = ata_scsi_queuecmd,
318 .can_queue = ATA_DEF_QUEUE,
319 .this_id = ATA_SHT_THIS_ID,
320 .sg_tablesize = LIBATA_MAX_PRD,
321 .max_sectors = ATA_MAX_SECTORS,
322 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
323 .emulated = ATA_SHT_EMULATED,
324 .use_clustering = ATA_SHT_USE_CLUSTERING,
325 .proc_name = DRV_NAME,
326 .dma_boundary = ATA_DMA_BOUNDARY,
327 .slave_configure = ata_scsi_slave_config,
328 .bios_param = ata_std_bios_param,
331 static struct ata_port_operations serverworks_osb4_port_ops = {
332 .port_disable = ata_port_disable,
333 .set_piomode = serverworks_set_piomode,
334 .set_dmamode = serverworks_set_dmamode,
335 .mode_filter = serverworks_osb4_filter,
337 .tf_load = ata_tf_load,
338 .tf_read = ata_tf_read,
339 .check_status = ata_check_status,
340 .exec_command = ata_exec_command,
341 .dev_select = ata_std_dev_select,
343 .freeze = ata_bmdma_freeze,
344 .thaw = ata_bmdma_thaw,
345 .error_handler = serverworks_error_handler,
346 .post_internal_cmd = ata_bmdma_post_internal_cmd,
348 .bmdma_setup = ata_bmdma_setup,
349 .bmdma_start = ata_bmdma_start,
350 .bmdma_stop = ata_bmdma_stop,
351 .bmdma_status = ata_bmdma_status,
353 .qc_prep = ata_qc_prep,
354 .qc_issue = ata_qc_issue_prot,
356 .data_xfer = ata_pio_data_xfer,
358 .irq_handler = ata_interrupt,
359 .irq_clear = ata_bmdma_irq_clear,
361 .port_start = ata_port_start,
362 .port_stop = ata_port_stop,
363 .host_stop = ata_host_stop
366 static struct ata_port_operations serverworks_csb_port_ops = {
367 .port_disable = ata_port_disable,
368 .set_piomode = serverworks_set_piomode,
369 .set_dmamode = serverworks_set_dmamode,
370 .mode_filter = serverworks_csb_filter,
372 .tf_load = ata_tf_load,
373 .tf_read = ata_tf_read,
374 .check_status = ata_check_status,
375 .exec_command = ata_exec_command,
376 .dev_select = ata_std_dev_select,
378 .freeze = ata_bmdma_freeze,
379 .thaw = ata_bmdma_thaw,
380 .error_handler = serverworks_error_handler,
381 .post_internal_cmd = ata_bmdma_post_internal_cmd,
383 .bmdma_setup = ata_bmdma_setup,
384 .bmdma_start = ata_bmdma_start,
385 .bmdma_stop = ata_bmdma_stop,
386 .bmdma_status = ata_bmdma_status,
388 .qc_prep = ata_qc_prep,
389 .qc_issue = ata_qc_issue_prot,
391 .data_xfer = ata_pio_data_xfer,
393 .irq_handler = ata_interrupt,
394 .irq_clear = ata_bmdma_irq_clear,
396 .port_start = ata_port_start,
397 .port_stop = ata_port_stop,
398 .host_stop = ata_host_stop
401 static int serverworks_fixup_osb4(struct pci_dev *pdev)
404 struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
405 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
407 pci_read_config_dword(isa_dev, 0x64, ®);
408 reg &= ~0x00002000; /* disable 600ns interrupt mask */
409 if (!(reg & 0x00004000))
410 printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n");
411 reg |= 0x00004000; /* enable UDMA/33 support */
412 pci_write_config_dword(isa_dev, 0x64, reg);
413 pci_dev_put(isa_dev);
416 printk(KERN_WARNING "ata_serverworks: Unable to find bridge.\n");
420 static int serverworks_fixup_csb(struct pci_dev *pdev)
425 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
427 /* Third Channel Test */
428 if (!(PCI_FUNC(pdev->devfn) & 1)) {
429 struct pci_dev * findev = NULL;
431 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
432 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
434 pci_read_config_dword(findev, 0x4C, ®4c);
435 reg4c &= ~0x000007FF;
438 pci_write_config_dword(findev, 0x4C, reg4c);
442 struct pci_dev * findev = NULL;
445 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
446 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
448 pci_read_config_byte(findev, 0x41, ®41);
450 pci_write_config_byte(findev, 0x41, reg41);
454 /* setup the UDMA Control register
456 * 1. clear bit 6 to enable DMA
457 * 2. enable DMA modes with bits 0-1
461 * 11 : udma2/udma4/udma5
463 pci_read_config_byte(pdev, 0x5A, &btr);
465 if (!(PCI_FUNC(pdev->devfn) & 1))
468 btr |= (rev >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
469 pci_write_config_byte(pdev, 0x5A, btr);
474 static void serverworks_fixup_ht1000(struct pci_dev *pdev)
477 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
478 pci_read_config_byte(pdev, 0x5A, &btr);
481 pci_write_config_byte(pdev, 0x5A, btr);
485 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
488 static struct ata_port_info info[4] = {
490 .sht = &serverworks_sht,
491 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
495 .port_ops = &serverworks_osb4_port_ops
496 }, { /* OSB4 no UDMA */
497 .sht = &serverworks_sht,
498 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
502 .port_ops = &serverworks_osb4_port_ops
504 .sht = &serverworks_sht,
505 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
509 .port_ops = &serverworks_csb_port_ops
510 }, { /* CSB5 - later revisions*/
511 .sht = &serverworks_sht,
512 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
516 .port_ops = &serverworks_csb_port_ops
519 static struct ata_port_info *port_info[2];
520 struct ata_port_info *devinfo = &info[id->driver_data];
522 /* Force master latency timer to 64 PCI clocks */
523 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
525 /* OSB4 : South Bridge and IDE */
526 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
527 /* Select non UDMA capable OSB4 if we can't do fixups */
528 if ( serverworks_fixup_osb4(pdev) < 0)
531 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
532 else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
533 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
534 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
536 /* If the returned btr is the newer revision then
537 select the right info block */
538 if (serverworks_fixup_csb(pdev) == 3)
541 /* Is this the 3rd channel CSB6 IDE ? */
542 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
546 else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
547 serverworks_fixup_ht1000(pdev);
549 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
550 ata_pci_clear_simplex(pdev);
552 port_info[0] = port_info[1] = devinfo;
553 return ata_pci_init_one(pdev, port_info, ports);
556 static struct pci_device_id serverworks[] = {
557 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
558 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
559 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
560 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
561 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
565 static struct pci_driver serverworks_pci_driver = {
567 .id_table = serverworks,
568 .probe = serverworks_init_one,
569 .remove = ata_pci_remove_one
572 static int __init serverworks_init(void)
574 return pci_register_driver(&serverworks_pci_driver);
578 static void __exit serverworks_exit(void)
580 pci_unregister_driver(&serverworks_pci_driver);
584 MODULE_AUTHOR("Alan Cox");
585 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
586 MODULE_LICENSE("GPL");
587 MODULE_DEVICE_TABLE(pci, serverworks);
588 MODULE_VERSION(DRV_VERSION);
590 module_init(serverworks_init);
591 module_exit(serverworks_exit);