1 // SPDX-License-Identifier: GPL-2.0-only
3 * pata_serverworks.c - Serverworks PATA for new ATA layer
5 * (C) 2010 Bartlomiej Zolnierkiewicz
11 * Copyright (C) 1998-2000 Michel Aubry
12 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
13 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
14 * Portions copyright (c) 2001 Sun Microsystems
17 * RCC/ServerWorks IDE driver for Linux
19 * OSB4: `Open South Bridge' IDE Interface (fn 1)
20 * supports UDMA mode 2 (33 MB/s)
22 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
23 * all revisions support UDMA mode 4 (66 MB/s)
24 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
26 * *** The CSB5 does not provide ANY register ***
27 * *** to detect 80-conductor cable presence. ***
29 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
32 * Available under NDA only. Errata info very hard to get.
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.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 * oem_cable - Dell/Sun serverworks cable detection
62 * @ap: ATA port to do cable detect
64 * Dell PowerEdge and Sun Cobalt 'Alpine' hide the 40/80 pin select
65 * for their interfaces in the top two bits of the subsystem ID.
68 static int oem_cable(struct ata_port *ap)
70 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
72 if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
73 return ATA_CBL_PATA80;
74 return ATA_CBL_PATA40;
77 struct sv_cable_table {
80 int (*cable_detect)(struct ata_port *ap);
83 static struct sv_cable_table cable_detect[] = {
84 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, oem_cable },
85 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, oem_cable },
86 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, oem_cable },
87 { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, ata_cable_40wire },
88 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, ata_cable_unknown },
89 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, ata_cable_unknown },
90 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, ata_cable_unknown },
91 { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, ata_cable_unknown },
96 * serverworks_cable_detect - cable detection
99 * Perform cable detection according to the device and subvendor
103 static int serverworks_cable_detect(struct ata_port *ap)
105 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
106 struct sv_cable_table *cb = cable_detect;
109 if (cb->device == pdev->device &&
110 (cb->subvendor == pdev->subsystem_vendor ||
111 cb->subvendor == PCI_ANY_ID)) {
112 return cb->cable_detect(ap);
118 return -1; /* kill compiler warning */
122 * serverworks_is_csb - Check for CSB or OSB
123 * @pdev: PCI device to check
125 * Returns true if the device being checked is known to be a CSB
129 static u8 serverworks_is_csb(struct pci_dev *pdev)
131 switch (pdev->device) {
132 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
133 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
134 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
135 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
144 * serverworks_osb4_filter - mode selection filter
146 * @mask: Mask of proposed modes
148 * Filter the offered modes for the device to apply controller
149 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
153 static unsigned int serverworks_osb4_filter(struct ata_device *adev, unsigned int mask)
155 if (adev->class == ATA_DEV_ATA)
156 mask &= ~ATA_MASK_UDMA;
162 * serverworks_csb_filter - mode selection filter
164 * @mask: Mask of proposed modes
166 * Check the blacklist and disable UDMA5 if matched
169 static unsigned int serverworks_csb_filter(struct ata_device *adev, unsigned int mask)
172 char model_num[ATA_ID_PROD_LEN + 1];
176 if (adev->class != ATA_DEV_ATA)
179 /* Actually do need to check */
180 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
182 for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
183 if (!strcmp(p, model_num))
184 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
190 * serverworks_set_piomode - set initial PIO mode data
194 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
195 * load is done as a simple lookup.
197 static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
199 static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
200 int offset = 1 + 2 * ap->port_no - adev->devno;
201 int devbits = (2 * ap->port_no + adev->devno) * 4;
203 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
204 int pio = adev->pio_mode - XFER_PIO_0;
206 pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
208 /* The OSB4 just requires the timing but the CSB series want the
209 mode number as well */
210 if (serverworks_is_csb(pdev)) {
211 pci_read_config_word(pdev, 0x4A, &csb5_pio);
212 csb5_pio &= ~(0x0F << devbits);
213 pci_write_config_word(pdev, 0x4A, csb5_pio | (pio << devbits));
218 * serverworks_set_dmamode - set initial DMA mode data
222 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
223 * chipset. The MWDMA mode values are pulled from a lookup table
224 * while the chipset uses mode number for UDMA.
227 static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
229 static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
230 int offset = 1 + 2 * ap->port_no - adev->devno;
231 int devbits = 2 * ap->port_no + adev->devno;
234 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
236 pci_read_config_byte(pdev, 0x54, &ultra_cfg);
237 pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
238 ultra &= ~(0x0F << (adev->devno * 4));
240 if (adev->dma_mode >= XFER_UDMA_0) {
241 pci_write_config_byte(pdev, 0x44 + offset, 0x20);
243 ultra |= (adev->dma_mode - XFER_UDMA_0)
244 << (adev->devno * 4);
245 ultra_cfg |= (1 << devbits);
247 pci_write_config_byte(pdev, 0x44 + offset,
248 dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
249 ultra_cfg &= ~(1 << devbits);
251 pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
252 pci_write_config_byte(pdev, 0x54, ultra_cfg);
255 static struct scsi_host_template serverworks_osb4_sht = {
256 ATA_BASE_SHT(DRV_NAME),
257 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
258 .dma_boundary = ATA_DMA_BOUNDARY,
261 static struct scsi_host_template serverworks_csb_sht = {
262 ATA_BMDMA_SHT(DRV_NAME),
265 static struct ata_port_operations serverworks_osb4_port_ops = {
266 .inherits = &ata_bmdma_port_ops,
267 .qc_prep = ata_bmdma_dumb_qc_prep,
268 .cable_detect = serverworks_cable_detect,
269 .mode_filter = serverworks_osb4_filter,
270 .set_piomode = serverworks_set_piomode,
271 .set_dmamode = serverworks_set_dmamode,
274 static struct ata_port_operations serverworks_csb_port_ops = {
275 .inherits = &serverworks_osb4_port_ops,
276 .qc_prep = ata_bmdma_qc_prep,
277 .mode_filter = serverworks_csb_filter,
280 static int serverworks_fixup_osb4(struct pci_dev *pdev)
283 struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
284 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
286 pci_read_config_dword(isa_dev, 0x64, ®);
287 reg &= ~0x00002000; /* disable 600ns interrupt mask */
288 if (!(reg & 0x00004000))
289 dev_info(&pdev->dev, "UDMA not BIOS enabled.\n");
290 reg |= 0x00004000; /* enable UDMA/33 support */
291 pci_write_config_dword(isa_dev, 0x64, reg);
292 pci_dev_put(isa_dev);
295 dev_warn(&pdev->dev, "Unable to find bridge.\n");
299 static int serverworks_fixup_csb(struct pci_dev *pdev)
303 /* Third Channel Test */
304 if (!(PCI_FUNC(pdev->devfn) & 1)) {
305 struct pci_dev * findev = NULL;
307 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
308 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
310 pci_read_config_dword(findev, 0x4C, ®4c);
311 reg4c &= ~0x000007FF;
314 pci_write_config_dword(findev, 0x4C, reg4c);
318 struct pci_dev * findev = NULL;
321 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
322 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
324 pci_read_config_byte(findev, 0x41, ®41);
326 pci_write_config_byte(findev, 0x41, reg41);
330 /* setup the UDMA Control register
332 * 1. clear bit 6 to enable DMA
333 * 2. enable DMA modes with bits 0-1
337 * 11 : udma2/udma4/udma5
339 pci_read_config_byte(pdev, 0x5A, &btr);
341 if (!(PCI_FUNC(pdev->devfn) & 1))
344 btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
345 pci_write_config_byte(pdev, 0x5A, btr);
350 static void serverworks_fixup_ht1000(struct pci_dev *pdev)
353 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
354 pci_read_config_byte(pdev, 0x5A, &btr);
357 pci_write_config_byte(pdev, 0x5A, btr);
360 static int serverworks_fixup(struct pci_dev *pdev)
364 /* Force master latency timer to 64 PCI clocks */
365 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
367 switch (pdev->device) {
368 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
369 rc = serverworks_fixup_osb4(pdev);
371 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
372 ata_pci_bmdma_clear_simplex(pdev);
374 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
375 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
376 rc = serverworks_fixup_csb(pdev);
378 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
379 serverworks_fixup_ht1000(pdev);
386 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
388 static const struct ata_port_info info[4] = {
390 .flags = ATA_FLAG_SLAVE_POSS,
391 .pio_mask = ATA_PIO4,
392 .mwdma_mask = ATA_MWDMA2,
393 .udma_mask = ATA_UDMA2,
394 .port_ops = &serverworks_osb4_port_ops
395 }, { /* OSB4 no UDMA */
396 .flags = ATA_FLAG_SLAVE_POSS,
397 .pio_mask = ATA_PIO4,
398 .mwdma_mask = ATA_MWDMA2,
400 .port_ops = &serverworks_osb4_port_ops
402 .flags = ATA_FLAG_SLAVE_POSS,
403 .pio_mask = ATA_PIO4,
404 .mwdma_mask = ATA_MWDMA2,
405 .udma_mask = ATA_UDMA4,
406 .port_ops = &serverworks_csb_port_ops
407 }, { /* CSB5 - later revisions*/
408 .flags = ATA_FLAG_SLAVE_POSS,
409 .pio_mask = ATA_PIO4,
410 .mwdma_mask = ATA_MWDMA2,
411 .udma_mask = ATA_UDMA5,
412 .port_ops = &serverworks_csb_port_ops
415 const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
416 struct scsi_host_template *sht = &serverworks_csb_sht;
419 rc = pcim_enable_device(pdev);
423 rc = serverworks_fixup(pdev);
425 /* OSB4 : South Bridge and IDE */
426 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
427 /* Select non UDMA capable OSB4 if we can't do fixups */
430 sht = &serverworks_osb4_sht;
432 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
433 else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
434 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
435 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
437 /* If the returned btr is the newer revision then
438 select the right info block */
442 /* Is this the 3rd channel CSB6 IDE ? */
443 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
444 ppi[1] = &ata_dummy_port_info;
447 return ata_pci_bmdma_init_one(pdev, ppi, sht, NULL, 0);
450 #ifdef CONFIG_PM_SLEEP
451 static int serverworks_reinit_one(struct pci_dev *pdev)
453 struct ata_host *host = pci_get_drvdata(pdev);
456 rc = ata_pci_device_do_resume(pdev);
460 (void)serverworks_fixup(pdev);
462 ata_host_resume(host);
467 static const struct pci_device_id serverworks[] = {
468 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
469 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
470 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
471 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
472 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
477 static struct pci_driver serverworks_pci_driver = {
479 .id_table = serverworks,
480 .probe = serverworks_init_one,
481 .remove = ata_pci_remove_one,
482 #ifdef CONFIG_PM_SLEEP
483 .suspend = ata_pci_device_suspend,
484 .resume = serverworks_reinit_one,
488 module_pci_driver(serverworks_pci_driver);
490 MODULE_AUTHOR("Alan Cox");
491 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
492 MODULE_LICENSE("GPL");
493 MODULE_DEVICE_TABLE(pci, serverworks);
494 MODULE_VERSION(DRV_VERSION);