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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / ide / amd74xx.c
blob3747b2561f099f7af257edb2b1fbebdbfb979f25
1 /*
2 * AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
3 * IDE driver for Linux.
4 *
5 * Copyright (c) 2000-2002 Vojtech Pavlik
6 * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
7 *
8 * Based on the work of:
9 * Andre Hedrick
10 */
11
12 /*
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License version 2 as published by
15 * the Free Software Foundation.
16 */
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/pci.h>
21 #include <linux/init.h>
22 #include <linux/ide.h>
23
24 #define DRV_NAME "amd74xx"
25
26 enum {
27 AMD_IDE_CONFIG = 0x41,
28 AMD_CABLE_DETECT = 0x42,
29 AMD_DRIVE_TIMING = 0x48,
30 AMD_8BIT_TIMING = 0x4e,
31 AMD_ADDRESS_SETUP = 0x4c,
32 AMD_UDMA_TIMING = 0x50,
33 };
34
35 static unsigned int amd_80w;
36 static unsigned int amd_clock;
37
38 static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
39 static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };
40
41 static inline u8 amd_offset(struct pci_dev *dev)
42 {
43 return (dev->vendor == PCI_VENDOR_ID_NVIDIA) ? 0x10 : 0;
44 }
45
46 /*
47 * amd_set_speed() writes timing values to the chipset registers
48 */
49
50 static void amd_set_speed(struct pci_dev *dev, u8 dn, u8 udma_mask,
51 struct ide_timing *timing)
52 {
53 u8 t = 0, offset = amd_offset(dev);
54
55 pci_read_config_byte(dev, AMD_ADDRESS_SETUP + offset, &t);
56 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
57 pci_write_config_byte(dev, AMD_ADDRESS_SETUP + offset, t);
58
59 pci_write_config_byte(dev, AMD_8BIT_TIMING + offset + (1 - (dn >> 1)),
60 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
61
62 pci_write_config_byte(dev, AMD_DRIVE_TIMING + offset + (3 - dn),
63 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
64
65 switch (udma_mask) {
66 case ATA_UDMA2: t = timing->udma ? (0xc0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
67 case ATA_UDMA4: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 2, 10)]) : 0x03; break;
68 case ATA_UDMA5: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 10)]) : 0x03; break;
69 case ATA_UDMA6: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 15)]) : 0x03; break;
70 default: return;
71 }
72
73 if (timing->udma)
74 pci_write_config_byte(dev, AMD_UDMA_TIMING + offset + 3 - dn, t);
75 }
76
77 /*
78 * amd_set_drive() computes timing values and configures the chipset
79 * to a desired transfer mode. It also can be called by upper layers.
80 */
81
82 static void amd_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
83 {
84 struct pci_dev *dev = to_pci_dev(hwif->dev);
85 ide_drive_t *peer = ide_get_pair_dev(drive);
86 struct ide_timing t, p;
87 int T, UT;
88 u8 udma_mask = hwif->ultra_mask;
89 const u8 speed = drive->dma_mode;
90
91 T = 1000000000 / amd_clock;
92 UT = (udma_mask == ATA_UDMA2) ? T : (T / 2);
93
94 ide_timing_compute(drive, speed, &t, T, UT);
95
96 if (peer) {
97 ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
98 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
99 }
100
101 if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
102 if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;
103
104 amd_set_speed(dev, drive->dn, udma_mask, &t);
105 }
106
107 /*
108 * amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
109 */
110
111 static void amd_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
112 {
113 drive->dma_mode = drive->pio_mode;
114 amd_set_drive(hwif, drive);
115 }
116
117 static void amd7409_cable_detect(struct pci_dev *dev)
118 {
119 /* no host side cable detection */
120 amd_80w = 0x03;
121 }
122
123 static void amd7411_cable_detect(struct pci_dev *dev)
124 {
125 int i;
126 u32 u = 0;
127 u8 t = 0, offset = amd_offset(dev);
128
129 pci_read_config_byte(dev, AMD_CABLE_DETECT + offset, &t);
130 pci_read_config_dword(dev, AMD_UDMA_TIMING + offset, &u);
131 amd_80w = ((t & 0x3) ? 1 : 0) | ((t & 0xc) ? 2 : 0);
132 for (i = 24; i >= 0; i -= 8)
133 if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
134 printk(KERN_WARNING DRV_NAME " %s: BIOS didn't set "
135 "cable bits correctly. Enabling workaround.\n",
136 pci_name(dev));
137 amd_80w |= (1 << (1 - (i >> 4)));
138 }
139 }
140
141 /*
142 * The initialization callback. Initialize drive independent registers.
143 */
144
145 static int init_chipset_amd74xx(struct pci_dev *dev)
146 {
147 u8 t = 0, offset = amd_offset(dev);
148
149 /*
150 * Check 80-wire cable presence.
151 */
152
153 if (dev->vendor == PCI_VENDOR_ID_AMD &&
154 dev->device == PCI_DEVICE_ID_AMD_COBRA_7401)
155 ; /* no UDMA > 2 */
156 else if (dev->vendor == PCI_VENDOR_ID_AMD &&
157 dev->device == PCI_DEVICE_ID_AMD_VIPER_7409)
158 amd7409_cable_detect(dev);
159 else
160 amd7411_cable_detect(dev);
161
162 /*
163 * Take care of prefetch & postwrite.
164 */
165
166 pci_read_config_byte(dev, AMD_IDE_CONFIG + offset, &t);
167 /*
168 * Check for broken FIFO support.
169 */
170 if (dev->vendor == PCI_VENDOR_ID_AMD &&
171 dev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
172 t &= 0x0f;
173 else
174 t |= 0xf0;
175 pci_write_config_byte(dev, AMD_IDE_CONFIG + offset, t);
176
177 return 0;
178 }
179
180 static u8 amd_cable_detect(ide_hwif_t *hwif)
181 {
182 if ((amd_80w >> hwif->channel) & 1)
183 return ATA_CBL_PATA80;
184 else
185 return ATA_CBL_PATA40;
186 }
187
188 static const struct ide_port_ops amd_port_ops = {
189 .set_pio_mode = amd_set_pio_mode,
190 .set_dma_mode = amd_set_drive,
191 .cable_detect = amd_cable_detect,
192 };
193
194 #define IDE_HFLAGS_AMD \
195 (IDE_HFLAG_PIO_NO_BLACKLIST | \
196 IDE_HFLAG_POST_SET_MODE | \
197 IDE_HFLAG_IO_32BIT | \
198 IDE_HFLAG_UNMASK_IRQS)
199
200 #define DECLARE_AMD_DEV(swdma, udma) \
201 { \
202 .name = DRV_NAME, \
203 .init_chipset = init_chipset_amd74xx, \
204 .enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}}, \
205 .port_ops = &amd_port_ops, \
206 .host_flags = IDE_HFLAGS_AMD, \
207 .pio_mask = ATA_PIO5, \
208 .swdma_mask = swdma, \
209 .mwdma_mask = ATA_MWDMA2, \
210 .udma_mask = udma, \
211 }
212
213 #define DECLARE_NV_DEV(udma) \
214 { \
215 .name = DRV_NAME, \
216 .init_chipset = init_chipset_amd74xx, \
217 .enablebits = {{0x50,0x02,0x02}, {0x50,0x01,0x01}}, \
218 .port_ops = &amd_port_ops, \
219 .host_flags = IDE_HFLAGS_AMD, \
220 .pio_mask = ATA_PIO5, \
221 .swdma_mask = ATA_SWDMA2, \
222 .mwdma_mask = ATA_MWDMA2, \
223 .udma_mask = udma, \
224 }
225
226 static const struct ide_port_info amd74xx_chipsets[] __devinitdata = {
227 /* 0: AMD7401 */ DECLARE_AMD_DEV(0x00, ATA_UDMA2),
228 /* 1: AMD7409 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA4),
229 /* 2: AMD7411/7441 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
230 /* 3: AMD8111 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA6),
231
232 /* 4: NFORCE */ DECLARE_NV_DEV(ATA_UDMA5),
233 /* 5: >= NFORCE2 */ DECLARE_NV_DEV(ATA_UDMA6),
234
235 /* 6: AMD5536 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
236 };
237
238 static int __devinit amd74xx_probe(struct pci_dev *dev, const struct pci_device_id *id)
239 {
240 struct ide_port_info d;
241 u8 idx = id->driver_data;
242
243 d = amd74xx_chipsets[idx];
244
245 /*
246 * Check for bad SWDMA and incorrectly wired Serenade mainboards.
247 */
248 if (idx == 1) {
249 if (dev->revision <= 7)
250 d.swdma_mask = 0;
251 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
252 } else if (idx == 3) {
253 if (dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
254 dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
255 d.udma_mask = ATA_UDMA5;
256 }
257
258 /*
259 * It seems that on some nVidia controllers using AltStatus
260 * register can be unreliable so default to Status register
261 * if the device is in Compatibility Mode.
262 */
263 if (dev->vendor == PCI_VENDOR_ID_NVIDIA &&
264 ide_pci_is_in_compatibility_mode(dev))
265 d.host_flags |= IDE_HFLAG_BROKEN_ALTSTATUS;
266
267 printk(KERN_INFO "%s %s: UDMA%s controller\n",
268 d.name, pci_name(dev), amd_dma[fls(d.udma_mask) - 1]);
269
270 /*
271 * Determine the system bus clock.
272 */
273 amd_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
274
275 switch (amd_clock) {
276 case 33000: amd_clock = 33333; break;
277 case 37000: amd_clock = 37500; break;
278 case 41000: amd_clock = 41666; break;
279 }
280
281 if (amd_clock < 20000 || amd_clock > 50000) {
282 printk(KERN_WARNING "%s: User given PCI clock speed impossible"
283 " (%d), using 33 MHz instead.\n",
284 d.name, amd_clock);
285 amd_clock = 33333;
286 }
287
288 return ide_pci_init_one(dev, &d, NULL);
289 }
290
291 static const struct pci_device_id amd74xx_pci_tbl[] = {
292 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_COBRA_7401), 0 },
293 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7409), 1 },
294 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7411), 2 },
295 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_OPUS_7441), 2 },
296 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_8111_IDE), 3 },
297 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_IDE), 4 },
298 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE), 5 },
299 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE), 5 },
300 #ifdef CONFIG_BLK_DEV_IDE_SATA
301 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA), 5 },
302 #endif
303 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE), 5 },
304 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE), 5 },
305 #ifdef CONFIG_BLK_DEV_IDE_SATA
306 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA), 5 },
307 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2), 5 },
308 #endif
309 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE), 5 },
310 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE), 5 },
311 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE), 5 },
312 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE), 5 },
313 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE), 5 },
314 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE), 5 },
315 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE), 5 },
316 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE), 5 },
317 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE), 5 },
318 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5536_IDE), 6 },
319 { 0, },
320 };
321 MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);
322
323 static struct pci_driver amd74xx_pci_driver = {
324 .name = "AMD_IDE",
325 .id_table = amd74xx_pci_tbl,
326 .probe = amd74xx_probe,
327 .remove = ide_pci_remove,
328 .suspend = ide_pci_suspend,
329 .resume = ide_pci_resume,
330 };
331
332 static int __init amd74xx_ide_init(void)
333 {
334 return ide_pci_register_driver(&amd74xx_pci_driver);
335 }
336
337 static void __exit amd74xx_ide_exit(void)
338 {
339 pci_unregister_driver(&amd74xx_pci_driver);
340 }
341
342 module_init(amd74xx_ide_init);
343 module_exit(amd74xx_ide_exit);
344
345 MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz");
346 MODULE_DESCRIPTION("AMD PCI IDE driver");
347 MODULE_LICENSE("GPL");
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