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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / ata / pata_cmd64x.c
blob7acbbd9ee4691d81ab576659e16feeb400457fa1
1 /*
2 * pata_cmd64x.c - CMD64x PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * Based upon
7 * linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
8 *
9 * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
10 * Note, this driver is not used at all on other systems because
11 * there the "BIOS" has done all of the following already.
12 * Due to massive hardware bugs, UltraDMA is only supported
13 * on the 646U2 and not on the 646U.
14 *
15 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
16 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
17 *
18 * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
19 *
20 * TODO
21 * Testing work
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/delay.h>
30 #include <scsi/scsi_host.h>
31 #include <linux/libata.h>
32
33 #define DRV_NAME "pata_cmd64x"
34 #define DRV_VERSION "0.2.5"
35
36 /*
37 * CMD64x specific registers definition.
38 */
39
40 enum {
41 CFR = 0x50,
42 CFR_INTR_CH0 = 0x02,
43 CNTRL = 0x51,
44 CNTRL_DIS_RA0 = 0x40,
45 CNTRL_DIS_RA1 = 0x80,
46 CNTRL_ENA_2ND = 0x08,
47 CMDTIM = 0x52,
48 ARTTIM0 = 0x53,
49 DRWTIM0 = 0x54,
50 ARTTIM1 = 0x55,
51 DRWTIM1 = 0x56,
52 ARTTIM23 = 0x57,
53 ARTTIM23_DIS_RA2 = 0x04,
54 ARTTIM23_DIS_RA3 = 0x08,
55 ARTTIM23_INTR_CH1 = 0x10,
56 ARTTIM2 = 0x57,
57 ARTTIM3 = 0x57,
58 DRWTIM23 = 0x58,
59 DRWTIM2 = 0x58,
60 BRST = 0x59,
61 DRWTIM3 = 0x5b,
62 BMIDECR0 = 0x70,
63 MRDMODE = 0x71,
64 MRDMODE_INTR_CH0 = 0x04,
65 MRDMODE_INTR_CH1 = 0x08,
66 MRDMODE_BLK_CH0 = 0x10,
67 MRDMODE_BLK_CH1 = 0x20,
68 BMIDESR0 = 0x72,
69 UDIDETCR0 = 0x73,
70 DTPR0 = 0x74,
71 BMIDECR1 = 0x78,
72 BMIDECSR = 0x79,
73 BMIDESR1 = 0x7A,
74 UDIDETCR1 = 0x7B,
75 DTPR1 = 0x7C
76 };
77
78 static int cmd648_cable_detect(struct ata_port *ap)
79 {
80 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
81 u8 r;
82
83 /* Check cable detect bits */
84 pci_read_config_byte(pdev, BMIDECSR, &r);
85 if (r & (1 << ap->port_no))
86 return ATA_CBL_PATA80;
87 return ATA_CBL_PATA40;
88 }
89
90 /**
91 * cmd64x_set_piomode - set PIO and MWDMA timing
92 * @ap: ATA interface
93 * @adev: ATA device
94 * @mode: mode
95 *
96 * Called to do the PIO and MWDMA mode setup.
97 */
98
99 static void cmd64x_set_timing(struct ata_port *ap, struct ata_device *adev, u8 mode)
100 {
101 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
102 struct ata_timing t;
103 const unsigned long T = 1000000 / 33;
104 const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
105
106 u8 reg;
107
108 /* Port layout is not logical so use a table */
109 const u8 arttim_port[2][2] = {
110 { ARTTIM0, ARTTIM1 },
111 { ARTTIM23, ARTTIM23 }
112 };
113 const u8 drwtim_port[2][2] = {
114 { DRWTIM0, DRWTIM1 },
115 { DRWTIM2, DRWTIM3 }
116 };
117
118 int arttim = arttim_port[ap->port_no][adev->devno];
119 int drwtim = drwtim_port[ap->port_no][adev->devno];
120
121 /* ata_timing_compute is smart and will produce timings for MWDMA
122 that don't violate the drives PIO capabilities. */
123 if (ata_timing_compute(adev, mode, &t, T, 0) < 0) {
124 printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
125 return;
126 }
127 if (ap->port_no) {
128 /* Slave has shared address setup */
129 struct ata_device *pair = ata_dev_pair(adev);
130
131 if (pair) {
132 struct ata_timing tp;
133 ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
134 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
135 }
136 }
137
138 printk(KERN_DEBUG DRV_NAME ": active %d recovery %d setup %d.\n",
139 t.active, t.recover, t.setup);
140 if (t.recover > 16) {
141 t.active += t.recover - 16;
142 t.recover = 16;
143 }
144 if (t.active > 16)
145 t.active = 16;
146
147 /* Now convert the clocks into values we can actually stuff into
148 the chip */
149
150 if (t.recover > 1)
151 t.recover--;
152 else
153 t.recover = 15;
154
155 if (t.setup > 4)
156 t.setup = 0xC0;
157 else
158 t.setup = setup_data[t.setup];
159
160 t.active &= 0x0F; /* 0 = 16 */
161
162 /* Load setup timing */
163 pci_read_config_byte(pdev, arttim, &reg);
164 reg &= 0x3F;
165 reg |= t.setup;
166 pci_write_config_byte(pdev, arttim, reg);
167
168 /* Load active/recovery */
169 pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
170 }
171
172 /**
173 * cmd64x_set_piomode - set initial PIO mode data
174 * @ap: ATA interface
175 * @adev: ATA device
176 *
177 * Used when configuring the devices ot set the PIO timings. All the
178 * actual work is done by the PIO/MWDMA setting helper
179 */
180
181 static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
182 {
183 cmd64x_set_timing(ap, adev, adev->pio_mode);
184 }
185
186 /**
187 * cmd64x_set_dmamode - set initial DMA mode data
188 * @ap: ATA interface
189 * @adev: ATA device
190 *
191 * Called to do the DMA mode setup.
192 */
193
194 static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
195 {
196 static const u8 udma_data[] = {
197 0x30, 0x20, 0x10, 0x20, 0x10, 0x00
198 };
199
200 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
201 u8 regU, regD;
202
203 int pciU = UDIDETCR0 + 8 * ap->port_no;
204 int pciD = BMIDESR0 + 8 * ap->port_no;
205 int shift = 2 * adev->devno;
206
207 pci_read_config_byte(pdev, pciD, &regD);
208 pci_read_config_byte(pdev, pciU, &regU);
209
210 /* DMA bits off */
211 regD &= ~(0x20 << adev->devno);
212 /* DMA control bits */
213 regU &= ~(0x30 << shift);
214 /* DMA timing bits */
215 regU &= ~(0x05 << adev->devno);
216
217 if (adev->dma_mode >= XFER_UDMA_0) {
218 /* Merge the timing value */
219 regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
220 /* Merge the control bits */
221 regU |= 1 << adev->devno; /* UDMA on */
222 if (adev->dma_mode > 2) /* 15nS timing */
223 regU |= 4 << adev->devno;
224 } else {
225 regU &= ~ (1 << adev->devno); /* UDMA off */
226 cmd64x_set_timing(ap, adev, adev->dma_mode);
227 }
228
229 regD |= 0x20 << adev->devno;
230
231 pci_write_config_byte(pdev, pciU, regU);
232 pci_write_config_byte(pdev, pciD, regD);
233 }
234
235 /**
236 * cmd648_dma_stop - DMA stop callback
237 * @qc: Command in progress
238 *
239 * DMA has completed.
240 */
241
242 static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
243 {
244 struct ata_port *ap = qc->ap;
245 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
246 u8 dma_intr;
247 int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
248 int dma_reg = ap->port_no ? ARTTIM2 : CFR;
249
250 ata_bmdma_stop(qc);
251
252 pci_read_config_byte(pdev, dma_reg, &dma_intr);
253 pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
254 }
255
256 /**
257 * cmd646r1_dma_stop - DMA stop callback
258 * @qc: Command in progress
259 *
260 * Stub for now while investigating the r1 quirk in the old driver.
261 */
262
263 static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
264 {
265 ata_bmdma_stop(qc);
266 }
267
268 static struct scsi_host_template cmd64x_sht = {
269 .module = THIS_MODULE,
270 .name = DRV_NAME,
271 .ioctl = ata_scsi_ioctl,
272 .queuecommand = ata_scsi_queuecmd,
273 .can_queue = ATA_DEF_QUEUE,
274 .this_id = ATA_SHT_THIS_ID,
275 .sg_tablesize = LIBATA_MAX_PRD,
276 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
277 .emulated = ATA_SHT_EMULATED,
278 .use_clustering = ATA_SHT_USE_CLUSTERING,
279 .proc_name = DRV_NAME,
280 .dma_boundary = ATA_DMA_BOUNDARY,
281 .slave_configure = ata_scsi_slave_config,
282 .slave_destroy = ata_scsi_slave_destroy,
283 .bios_param = ata_std_bios_param,
284 };
285
286 static struct ata_port_operations cmd64x_port_ops = {
287 .set_piomode = cmd64x_set_piomode,
288 .set_dmamode = cmd64x_set_dmamode,
289 .mode_filter = ata_pci_default_filter,
290 .tf_load = ata_tf_load,
291 .tf_read = ata_tf_read,
292 .check_status = ata_check_status,
293 .exec_command = ata_exec_command,
294 .dev_select = ata_std_dev_select,
295
296 .freeze = ata_bmdma_freeze,
297 .thaw = ata_bmdma_thaw,
298 .error_handler = ata_bmdma_error_handler,
299 .post_internal_cmd = ata_bmdma_post_internal_cmd,
300 .cable_detect = ata_cable_40wire,
301
302 .bmdma_setup = ata_bmdma_setup,
303 .bmdma_start = ata_bmdma_start,
304 .bmdma_stop = ata_bmdma_stop,
305 .bmdma_status = ata_bmdma_status,
306
307 .qc_prep = ata_qc_prep,
308 .qc_issue = ata_qc_issue_prot,
309
310 .data_xfer = ata_data_xfer,
311
312 .irq_handler = ata_interrupt,
313 .irq_clear = ata_bmdma_irq_clear,
314 .irq_on = ata_irq_on,
315
316 .port_start = ata_port_start,
317 };
318
319 static struct ata_port_operations cmd646r1_port_ops = {
320 .set_piomode = cmd64x_set_piomode,
321 .set_dmamode = cmd64x_set_dmamode,
322 .mode_filter = ata_pci_default_filter,
323 .tf_load = ata_tf_load,
324 .tf_read = ata_tf_read,
325 .check_status = ata_check_status,
326 .exec_command = ata_exec_command,
327 .dev_select = ata_std_dev_select,
328
329 .freeze = ata_bmdma_freeze,
330 .thaw = ata_bmdma_thaw,
331 .error_handler = ata_bmdma_error_handler,
332 .post_internal_cmd = ata_bmdma_post_internal_cmd,
333 .cable_detect = ata_cable_40wire,
334
335 .bmdma_setup = ata_bmdma_setup,
336 .bmdma_start = ata_bmdma_start,
337 .bmdma_stop = cmd646r1_bmdma_stop,
338 .bmdma_status = ata_bmdma_status,
339
340 .qc_prep = ata_qc_prep,
341 .qc_issue = ata_qc_issue_prot,
342
343 .data_xfer = ata_data_xfer,
344
345 .irq_handler = ata_interrupt,
346 .irq_clear = ata_bmdma_irq_clear,
347 .irq_on = ata_irq_on,
348
349 .port_start = ata_port_start,
350 };
351
352 static struct ata_port_operations cmd648_port_ops = {
353 .set_piomode = cmd64x_set_piomode,
354 .set_dmamode = cmd64x_set_dmamode,
355 .mode_filter = ata_pci_default_filter,
356 .tf_load = ata_tf_load,
357 .tf_read = ata_tf_read,
358 .check_status = ata_check_status,
359 .exec_command = ata_exec_command,
360 .dev_select = ata_std_dev_select,
361
362 .freeze = ata_bmdma_freeze,
363 .thaw = ata_bmdma_thaw,
364 .error_handler = ata_bmdma_error_handler,
365 .post_internal_cmd = ata_bmdma_post_internal_cmd,
366 .cable_detect = cmd648_cable_detect,
367
368 .bmdma_setup = ata_bmdma_setup,
369 .bmdma_start = ata_bmdma_start,
370 .bmdma_stop = cmd648_bmdma_stop,
371 .bmdma_status = ata_bmdma_status,
372
373 .qc_prep = ata_qc_prep,
374 .qc_issue = ata_qc_issue_prot,
375
376 .data_xfer = ata_data_xfer,
377
378 .irq_handler = ata_interrupt,
379 .irq_clear = ata_bmdma_irq_clear,
380 .irq_on = ata_irq_on,
381
382 .port_start = ata_port_start,
383 };
384
385 static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
386 {
387 u32 class_rev;
388
389 static const struct ata_port_info cmd_info[6] = {
390 { /* CMD 643 - no UDMA */
391 .sht = &cmd64x_sht,
392 .flags = ATA_FLAG_SLAVE_POSS,
393 .pio_mask = 0x1f,
394 .mwdma_mask = 0x07,
395 .port_ops = &cmd64x_port_ops
396 },
397 { /* CMD 646 with broken UDMA */
398 .sht = &cmd64x_sht,
399 .flags = ATA_FLAG_SLAVE_POSS,
400 .pio_mask = 0x1f,
401 .mwdma_mask = 0x07,
402 .port_ops = &cmd64x_port_ops
403 },
404 { /* CMD 646 with working UDMA */
405 .sht = &cmd64x_sht,
406 .flags = ATA_FLAG_SLAVE_POSS,
407 .pio_mask = 0x1f,
408 .mwdma_mask = 0x07,
409 .udma_mask = ATA_UDMA2,
410 .port_ops = &cmd64x_port_ops
411 },
412 { /* CMD 646 rev 1 */
413 .sht = &cmd64x_sht,
414 .flags = ATA_FLAG_SLAVE_POSS,
415 .pio_mask = 0x1f,
416 .mwdma_mask = 0x07,
417 .port_ops = &cmd646r1_port_ops
418 },
419 { /* CMD 648 */
420 .sht = &cmd64x_sht,
421 .flags = ATA_FLAG_SLAVE_POSS,
422 .pio_mask = 0x1f,
423 .mwdma_mask = 0x07,
424 .udma_mask = ATA_UDMA4,
425 .port_ops = &cmd648_port_ops
426 },
427 { /* CMD 649 */
428 .sht = &cmd64x_sht,
429 .flags = ATA_FLAG_SLAVE_POSS,
430 .pio_mask = 0x1f,
431 .mwdma_mask = 0x07,
432 .udma_mask = ATA_UDMA5,
433 .port_ops = &cmd648_port_ops
434 }
435 };
436 const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
437 u8 mrdmode;
438
439 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
440 class_rev &= 0xFF;
441
442 if (id->driver_data == 0) /* 643 */
443 ata_pci_clear_simplex(pdev);
444
445 if (pdev->device == PCI_DEVICE_ID_CMD_646) {
446 /* Does UDMA work ? */
447 if (class_rev > 4)
448 ppi[0] = &cmd_info[2];
449 /* Early rev with other problems ? */
450 else if (class_rev == 1)
451 ppi[0] = &cmd_info[3];
452 }
453
454 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
455 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
456 mrdmode &= ~ 0x30; /* IRQ set up */
457 mrdmode |= 0x02; /* Memory read line enable */
458 pci_write_config_byte(pdev, MRDMODE, mrdmode);
459
460 /* Force PIO 0 here.. */
461
462 /* PPC specific fixup copied from old driver */
463 #ifdef CONFIG_PPC
464 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
465 #endif
466
467 return ata_pci_init_one(pdev, ppi);
468 }
469
470 #ifdef CONFIG_PM
471 static int cmd64x_reinit_one(struct pci_dev *pdev)
472 {
473 u8 mrdmode;
474 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
475 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
476 mrdmode &= ~ 0x30; /* IRQ set up */
477 mrdmode |= 0x02; /* Memory read line enable */
478 pci_write_config_byte(pdev, MRDMODE, mrdmode);
479 #ifdef CONFIG_PPC
480 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
481 #endif
482 return ata_pci_device_resume(pdev);
483 }
484 #endif
485
486 static const struct pci_device_id cmd64x[] = {
487 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
488 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
489 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
490 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
491
492 { },
493 };
494
495 static struct pci_driver cmd64x_pci_driver = {
496 .name = DRV_NAME,
497 .id_table = cmd64x,
498 .probe = cmd64x_init_one,
499 .remove = ata_pci_remove_one,
500 #ifdef CONFIG_PM
501 .suspend = ata_pci_device_suspend,
502 .resume = cmd64x_reinit_one,
503 #endif
504 };
505
506 static int __init cmd64x_init(void)
507 {
508 return pci_register_driver(&cmd64x_pci_driver);
509 }
510
511 static void __exit cmd64x_exit(void)
512 {
513 pci_unregister_driver(&cmd64x_pci_driver);
514 }
515
516 MODULE_AUTHOR("Alan Cox");
517 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
518 MODULE_LICENSE("GPL");
519 MODULE_DEVICE_TABLE(pci, cmd64x);
520 MODULE_VERSION(DRV_VERSION);
521
522 module_init(cmd64x_init);
523 module_exit(cmd64x_exit);
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