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mm-only debug patch...
[mmotm.git] / drivers / ata / pata_cmd64x.c
blobf98dffedf4bc4b9772dfa192415b2c4517f18c13
1 /*
2 * pata_cmd64x.c - CMD64x PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@lxorguk.ukuu.org.uk>
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 ATA_BMDMA_SHT(DRV_NAME),
270 };
271
272 static const struct ata_port_operations cmd64x_base_ops = {
273 .inherits = &ata_bmdma_port_ops,
274 .set_piomode = cmd64x_set_piomode,
275 .set_dmamode = cmd64x_set_dmamode,
276 };
277
278 static struct ata_port_operations cmd64x_port_ops = {
279 .inherits = &cmd64x_base_ops,
280 .cable_detect = ata_cable_40wire,
281 };
282
283 static struct ata_port_operations cmd646r1_port_ops = {
284 .inherits = &cmd64x_base_ops,
285 .bmdma_stop = cmd646r1_bmdma_stop,
286 .cable_detect = ata_cable_40wire,
287 };
288
289 static struct ata_port_operations cmd648_port_ops = {
290 .inherits = &cmd64x_base_ops,
291 .bmdma_stop = cmd648_bmdma_stop,
292 .cable_detect = cmd648_cable_detect,
293 };
294
295 static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
296 {
297 u32 class_rev;
298
299 static const struct ata_port_info cmd_info[6] = {
300 { /* CMD 643 - no UDMA */
301 .flags = ATA_FLAG_SLAVE_POSS,
302 .pio_mask = ATA_PIO4,
303 .mwdma_mask = ATA_MWDMA2,
304 .port_ops = &cmd64x_port_ops
305 },
306 { /* CMD 646 with broken UDMA */
307 .flags = ATA_FLAG_SLAVE_POSS,
308 .pio_mask = ATA_PIO4,
309 .mwdma_mask = ATA_MWDMA2,
310 .port_ops = &cmd64x_port_ops
311 },
312 { /* CMD 646 with working UDMA */
313 .flags = ATA_FLAG_SLAVE_POSS,
314 .pio_mask = ATA_PIO4,
315 .mwdma_mask = ATA_MWDMA2,
316 .udma_mask = ATA_UDMA2,
317 .port_ops = &cmd64x_port_ops
318 },
319 { /* CMD 646 rev 1 */
320 .flags = ATA_FLAG_SLAVE_POSS,
321 .pio_mask = ATA_PIO4,
322 .mwdma_mask = ATA_MWDMA2,
323 .port_ops = &cmd646r1_port_ops
324 },
325 { /* CMD 648 */
326 .flags = ATA_FLAG_SLAVE_POSS,
327 .pio_mask = ATA_PIO4,
328 .mwdma_mask = ATA_MWDMA2,
329 .udma_mask = ATA_UDMA4,
330 .port_ops = &cmd648_port_ops
331 },
332 { /* CMD 649 */
333 .flags = ATA_FLAG_SLAVE_POSS,
334 .pio_mask = ATA_PIO4,
335 .mwdma_mask = ATA_MWDMA2,
336 .udma_mask = ATA_UDMA5,
337 .port_ops = &cmd648_port_ops
338 }
339 };
340 const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
341 u8 mrdmode;
342 int rc;
343
344 rc = pcim_enable_device(pdev);
345 if (rc)
346 return rc;
347
348 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
349 class_rev &= 0xFF;
350
351 if (id->driver_data == 0) /* 643 */
352 ata_pci_bmdma_clear_simplex(pdev);
353
354 if (pdev->device == PCI_DEVICE_ID_CMD_646) {
355 /* Does UDMA work ? */
356 if (class_rev > 4)
357 ppi[0] = &cmd_info[2];
358 /* Early rev with other problems ? */
359 else if (class_rev == 1)
360 ppi[0] = &cmd_info[3];
361 }
362
363 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
364 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
365 mrdmode &= ~ 0x30; /* IRQ set up */
366 mrdmode |= 0x02; /* Memory read line enable */
367 pci_write_config_byte(pdev, MRDMODE, mrdmode);
368
369 /* Force PIO 0 here.. */
370
371 /* PPC specific fixup copied from old driver */
372 #ifdef CONFIG_PPC
373 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
374 #endif
375
376 return ata_pci_sff_init_one(pdev, ppi, &cmd64x_sht, NULL);
377 }
378
379 #ifdef CONFIG_PM
380 static int cmd64x_reinit_one(struct pci_dev *pdev)
381 {
382 struct ata_host *host = dev_get_drvdata(&pdev->dev);
383 u8 mrdmode;
384 int rc;
385
386 rc = ata_pci_device_do_resume(pdev);
387 if (rc)
388 return rc;
389
390 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
391 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
392 mrdmode &= ~ 0x30; /* IRQ set up */
393 mrdmode |= 0x02; /* Memory read line enable */
394 pci_write_config_byte(pdev, MRDMODE, mrdmode);
395 #ifdef CONFIG_PPC
396 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
397 #endif
398 ata_host_resume(host);
399 return 0;
400 }
401 #endif
402
403 static const struct pci_device_id cmd64x[] = {
404 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
405 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
406 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
407 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
408
409 { },
410 };
411
412 static struct pci_driver cmd64x_pci_driver = {
413 .name = DRV_NAME,
414 .id_table = cmd64x,
415 .probe = cmd64x_init_one,
416 .remove = ata_pci_remove_one,
417 #ifdef CONFIG_PM
418 .suspend = ata_pci_device_suspend,
419 .resume = cmd64x_reinit_one,
420 #endif
421 };
422
423 static int __init cmd64x_init(void)
424 {
425 return pci_register_driver(&cmd64x_pci_driver);
426 }
427
428 static void __exit cmd64x_exit(void)
429 {
430 pci_unregister_driver(&cmd64x_pci_driver);
431 }
432
433 MODULE_AUTHOR("Alan Cox");
434 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
435 MODULE_LICENSE("GPL");
436 MODULE_DEVICE_TABLE(pci, cmd64x);
437 MODULE_VERSION(DRV_VERSION);
438
439 module_init(cmd64x_init);
440 module_exit(cmd64x_exit);
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