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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / ide / pci / serverworks.c
blobc11880b0709f711c4ee49ef2edc376f8e57e1df6
1 /*
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
7 *
8 *
9 * RCC/ServerWorks IDE driver for Linux
10 *
11 * OSB4: `Open South Bridge' IDE Interface (fn 1)
12 * supports UDMA mode 2 (33 MB/s)
13 *
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)
17 *
18 * *** The CSB5 does not provide ANY register ***
19 * *** to detect 80-conductor cable presence. ***
20 *
21 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
22 *
23 * HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
24 * controller same as the CSB6. Single channel ATA100 only.
25 *
26 * Documentation:
27 * Available under NDA only. Errata info very hard to get.
28 *
29 */
30
31 #include <linux/types.h>
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/pci.h>
35 #include <linux/hdreg.h>
36 #include <linux/ide.h>
37 #include <linux/init.h>
38
39 #include <asm/io.h>
40
41 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
42 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
43
44 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
45 * can overrun their FIFOs when used with the CSB5 */
46 static const char *svwks_bad_ata100[] = {
47 "ST320011A",
48 "ST340016A",
49 "ST360021A",
50 "ST380021A",
51 NULL
52 };
53
54 static struct pci_dev *isa_dev;
55
56 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
57 {
58 while (*list)
59 if (!strcmp(*list++, drive->id->model))
60 return 1;
61 return 0;
62 }
63
64 static u8 svwks_udma_filter(ide_drive_t *drive)
65 {
66 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
67 u8 mask = 0;
68
69 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
70 return 0x1f;
71 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
72 u32 reg = 0;
73 if (isa_dev)
74 pci_read_config_dword(isa_dev, 0x64, &reg);
75
76 /*
77 * Don't enable UDMA on disk devices for the moment
78 */
79 if(drive->media == ide_disk)
80 return 0;
81 /* Check the OSB4 DMA33 enable bit */
82 return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
83 } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
84 return 0x07;
85 } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
86 u8 btr = 0, mode;
87 pci_read_config_byte(dev, 0x5A, &btr);
88 mode = btr & 0x3;
89
90 /* If someone decides to do UDMA133 on CSB5 the same
91 issue will bite so be inclusive */
92 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
93 mode = 2;
94
95 switch(mode) {
96 case 3: mask = 0x3f; break;
97 case 2: mask = 0x1f; break;
98 case 1: mask = 0x07; break;
99 default: mask = 0x00; break;
100 }
101 }
102 if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
103 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
104 (!(PCI_FUNC(dev->devfn) & 1)))
105 mask = 0x1f;
106
107 return mask;
108 }
109
110 static u8 svwks_csb_check (struct pci_dev *dev)
111 {
112 switch (dev->device) {
113 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
114 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
115 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
116 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
117 return 1;
118 default:
119 break;
120 }
121 return 0;
122 }
123
124 static void svwks_set_pio_mode(ide_drive_t *drive, const u8 pio)
125 {
126 static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
127 static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
128
129 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
130
131 pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
132
133 if (svwks_csb_check(dev)) {
134 u16 csb_pio = 0;
135
136 pci_read_config_word(dev, 0x4a, &csb_pio);
137
138 csb_pio &= ~(0x0f << (4 * drive->dn));
139 csb_pio |= (pio << (4 * drive->dn));
140
141 pci_write_config_word(dev, 0x4a, csb_pio);
142 }
143 }
144
145 static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
146 {
147 static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
148 static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
149 static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };
150
151 ide_hwif_t *hwif = HWIF(drive);
152 struct pci_dev *dev = to_pci_dev(hwif->dev);
153 u8 unit = (drive->select.b.unit & 0x01);
154
155 u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0;
156
157 pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
158 pci_read_config_byte(dev, 0x54, &ultra_enable);
159
160 ultra_timing &= ~(0x0F << (4*unit));
161 ultra_enable &= ~(0x01 << drive->dn);
162
163 if (speed >= XFER_UDMA_0) {
164 dma_timing |= dma_modes[2];
165 ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
166 ultra_enable |= (0x01 << drive->dn);
167 } else if (speed >= XFER_MW_DMA_0)
168 dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
169
170 pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
171 pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
172 pci_write_config_byte(dev, 0x54, ultra_enable);
173 }
174
175 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
176 {
177 unsigned int reg;
178 u8 btr;
179
180 /* force Master Latency Timer value to 64 PCICLKs */
181 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
182
183 /* OSB4 : South Bridge and IDE */
184 if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
185 isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
186 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
187 if (isa_dev) {
188 pci_read_config_dword(isa_dev, 0x64, &reg);
189 reg &= ~0x00002000; /* disable 600ns interrupt mask */
190 if(!(reg & 0x00004000))
191 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
192 reg |= 0x00004000; /* enable UDMA/33 support */
193 pci_write_config_dword(isa_dev, 0x64, reg);
194 }
195 }
196
197 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
198 else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
199 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
200 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
201
202 /* Third Channel Test */
203 if (!(PCI_FUNC(dev->devfn) & 1)) {
204 struct pci_dev * findev = NULL;
205 u32 reg4c = 0;
206 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
207 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
208 if (findev) {
209 pci_read_config_dword(findev, 0x4C, &reg4c);
210 reg4c &= ~0x000007FF;
211 reg4c |= 0x00000040;
212 reg4c |= 0x00000020;
213 pci_write_config_dword(findev, 0x4C, reg4c);
214 pci_dev_put(findev);
215 }
216 outb_p(0x06, 0x0c00);
217 dev->irq = inb_p(0x0c01);
218 } else {
219 struct pci_dev * findev = NULL;
220 u8 reg41 = 0;
221
222 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
223 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
224 if (findev) {
225 pci_read_config_byte(findev, 0x41, &reg41);
226 reg41 &= ~0x40;
227 pci_write_config_byte(findev, 0x41, reg41);
228 pci_dev_put(findev);
229 }
230 /*
231 * This is a device pin issue on CSB6.
232 * Since there will be a future raid mode,
233 * early versions of the chipset require the
234 * interrupt pin to be set, and it is a compatibility
235 * mode issue.
236 */
237 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
238 dev->irq = 0;
239 }
240 // pci_read_config_dword(dev, 0x40, &pioreg)
241 // pci_write_config_dword(dev, 0x40, 0x99999999);
242 // pci_read_config_dword(dev, 0x44, &dmareg);
243 // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
244 /* setup the UDMA Control register
245 *
246 * 1. clear bit 6 to enable DMA
247 * 2. enable DMA modes with bits 0-1
248 * 00 : legacy
249 * 01 : udma2
250 * 10 : udma2/udma4
251 * 11 : udma2/udma4/udma5
252 */
253 pci_read_config_byte(dev, 0x5A, &btr);
254 btr &= ~0x40;
255 if (!(PCI_FUNC(dev->devfn) & 1))
256 btr |= 0x2;
257 else
258 btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
259 pci_write_config_byte(dev, 0x5A, btr);
260 }
261 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
262 else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
263 pci_read_config_byte(dev, 0x5A, &btr);
264 btr &= ~0x40;
265 btr |= 0x3;
266 pci_write_config_byte(dev, 0x5A, btr);
267 }
268
269 return dev->irq;
270 }
271
272 static u8 __devinit ata66_svwks_svwks(ide_hwif_t *hwif)
273 {
274 return ATA_CBL_PATA80;
275 }
276
277 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
278 * of the subsystem device ID indicate presence of an 80-pin cable.
279 * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
280 * Bit 15 set = secondary IDE channel has 80-pin cable.
281 * Bit 14 clear = primary IDE channel does not have 80-pin cable.
282 * Bit 14 set = primary IDE channel has 80-pin cable.
283 */
284 static u8 __devinit ata66_svwks_dell(ide_hwif_t *hwif)
285 {
286 struct pci_dev *dev = to_pci_dev(hwif->dev);
287
288 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
289 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
290 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
291 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
292 return ((1 << (hwif->channel + 14)) &
293 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
294 return ATA_CBL_PATA40;
295 }
296
297 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
298 * detect issue by attaching the drives directly to the board.
299 * This check follows the Dell precedent (how scary is that?!)
300 *
301 * WARNING: this only works on Alpine hardware!
302 */
303 static u8 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif)
304 {
305 struct pci_dev *dev = to_pci_dev(hwif->dev);
306
307 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
308 dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
309 dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
310 return ((1 << (hwif->channel + 14)) &
311 dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
312 return ATA_CBL_PATA40;
313 }
314
315 static u8 __devinit ata66_svwks(ide_hwif_t *hwif)
316 {
317 struct pci_dev *dev = to_pci_dev(hwif->dev);
318
319 /* Server Works */
320 if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
321 return ata66_svwks_svwks (hwif);
322
323 /* Dell PowerEdge */
324 if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
325 return ata66_svwks_dell (hwif);
326
327 /* Cobalt Alpine */
328 if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
329 return ata66_svwks_cobalt (hwif);
330
331 /* Per Specified Design by OEM, and ASIC Architect */
332 if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
333 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
334 return ATA_CBL_PATA80;
335
336 return ATA_CBL_PATA40;
337 }
338
339 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
340 {
341 struct pci_dev *dev = to_pci_dev(hwif->dev);
342
343 hwif->set_pio_mode = &svwks_set_pio_mode;
344 hwif->set_dma_mode = &svwks_set_dma_mode;
345 hwif->udma_filter = &svwks_udma_filter;
346
347 if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
348 hwif->cable_detect = ata66_svwks;
349 }
350
351 #define IDE_HFLAGS_SVWKS \
352 (IDE_HFLAG_LEGACY_IRQS | \
353 IDE_HFLAG_ABUSE_SET_DMA_MODE | \
354 IDE_HFLAG_BOOTABLE)
355
356 static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
357 { /* 0 */
358 .name = "SvrWks OSB4",
359 .init_chipset = init_chipset_svwks,
360 .init_hwif = init_hwif_svwks,
361 .host_flags = IDE_HFLAGS_SVWKS,
362 .pio_mask = ATA_PIO4,
363 .mwdma_mask = ATA_MWDMA2,
364 .udma_mask = 0x00, /* UDMA is problematic on OSB4 */
365 },{ /* 1 */
366 .name = "SvrWks CSB5",
367 .init_chipset = init_chipset_svwks,
368 .init_hwif = init_hwif_svwks,
369 .host_flags = IDE_HFLAGS_SVWKS,
370 .pio_mask = ATA_PIO4,
371 .mwdma_mask = ATA_MWDMA2,
372 .udma_mask = ATA_UDMA5,
373 },{ /* 2 */
374 .name = "SvrWks CSB6",
375 .init_chipset = init_chipset_svwks,
376 .init_hwif = init_hwif_svwks,
377 .host_flags = IDE_HFLAGS_SVWKS,
378 .pio_mask = ATA_PIO4,
379 .mwdma_mask = ATA_MWDMA2,
380 .udma_mask = ATA_UDMA5,
381 },{ /* 3 */
382 .name = "SvrWks CSB6",
383 .init_chipset = init_chipset_svwks,
384 .init_hwif = init_hwif_svwks,
385 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
386 .pio_mask = ATA_PIO4,
387 .mwdma_mask = ATA_MWDMA2,
388 .udma_mask = ATA_UDMA5,
389 },{ /* 4 */
390 .name = "SvrWks HT1000",
391 .init_chipset = init_chipset_svwks,
392 .init_hwif = init_hwif_svwks,
393 .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
394 .pio_mask = ATA_PIO4,
395 .mwdma_mask = ATA_MWDMA2,
396 .udma_mask = ATA_UDMA5,
397 }
398 };
399
400 /**
401 * svwks_init_one - called when a OSB/CSB is found
402 * @dev: the svwks device
403 * @id: the matching pci id
404 *
405 * Called when the PCI registration layer (or the IDE initialization)
406 * finds a device matching our IDE device tables.
407 */
408
409 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
410 {
411 struct ide_port_info d;
412 u8 idx = id->driver_data;
413
414 d = serverworks_chipsets[idx];
415
416 if (idx == 1)
417 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
418 else if (idx == 2 || idx == 3) {
419 if ((PCI_FUNC(dev->devfn) & 1) == 0) {
420 if (pci_resource_start(dev, 0) != 0x01f1)
421 d.host_flags &= ~IDE_HFLAG_BOOTABLE;
422 d.host_flags |= IDE_HFLAG_SINGLE;
423 } else
424 d.host_flags &= ~IDE_HFLAG_SINGLE;
425 }
426
427 return ide_setup_pci_device(dev, &d);
428 }
429
430 static const struct pci_device_id svwks_pci_tbl[] = {
431 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0 },
432 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1 },
433 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2 },
434 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3 },
435 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
436 { 0, },
437 };
438 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
439
440 static struct pci_driver driver = {
441 .name = "Serverworks_IDE",
442 .id_table = svwks_pci_tbl,
443 .probe = svwks_init_one,
444 };
445
446 static int __init svwks_ide_init(void)
447 {
448 return ide_pci_register_driver(&driver);
449 }
450
451 module_init(svwks_ide_init);
452
453 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
454 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
455 MODULE_LICENSE("GPL");
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