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669a5db4 JG |
1 | /* |
2 | * pata_cmd64x.c - ATI 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 "0.2.1" | |
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 cmd64x_pre_reset(struct ata_port *ap) | |
79 | { | |
80 | ap->cbl = ATA_CBL_PATA40; | |
81 | return ata_std_prereset(ap); | |
82 | } | |
83 | ||
84 | static int cmd648_pre_reset(struct ata_port *ap) | |
85 | { | |
86 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
87 | u8 r; | |
88 | ||
89 | /* Check cable detect bits */ | |
90 | pci_read_config_byte(pdev, BMIDECSR, &r); | |
91 | if (r & (1 << ap->port_no)) | |
92 | ap->cbl = ATA_CBL_PATA80; | |
93 | else | |
94 | ap->cbl = ATA_CBL_PATA40; | |
95 | ||
96 | return ata_std_prereset(ap); | |
97 | } | |
98 | ||
99 | static void cmd64x_error_handler(struct ata_port *ap) | |
100 | { | |
101 | return ata_bmdma_drive_eh(ap, cmd64x_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
102 | } | |
103 | ||
104 | static void cmd648_error_handler(struct ata_port *ap) | |
105 | { | |
106 | ata_bmdma_drive_eh(ap, cmd648_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
107 | } | |
108 | ||
109 | /** | |
110 | * cmd64x_set_piomode - set initial PIO mode data | |
111 | * @ap: ATA interface | |
112 | * @adev: ATA device | |
113 | * | |
114 | * Called to do the PIO mode setup. | |
115 | */ | |
116 | ||
117 | static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
118 | { | |
119 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
120 | struct ata_timing t; | |
121 | const unsigned long T = 1000000 / 33; | |
122 | const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 }; | |
123 | ||
124 | u8 reg; | |
125 | ||
126 | /* Port layout is not logical so use a table */ | |
127 | const u8 arttim_port[2][2] = { | |
128 | { ARTTIM0, ARTTIM1 }, | |
129 | { ARTTIM23, ARTTIM23 } | |
130 | }; | |
131 | const u8 drwtim_port[2][2] = { | |
132 | { DRWTIM0, DRWTIM1 }, | |
133 | { DRWTIM2, DRWTIM3 } | |
134 | }; | |
135 | ||
136 | int arttim = arttim_port[ap->port_no][adev->devno]; | |
137 | int drwtim = drwtim_port[ap->port_no][adev->devno]; | |
138 | ||
139 | ||
140 | if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) { | |
141 | printk(KERN_ERR DRV_NAME ": mode computation failed.\n"); | |
142 | return; | |
143 | } | |
144 | if (ap->port_no) { | |
145 | /* Slave has shared address setup */ | |
146 | struct ata_device *pair = ata_dev_pair(adev); | |
147 | ||
148 | if (pair) { | |
149 | struct ata_timing tp; | |
150 | ata_timing_compute(pair, pair->pio_mode, &tp, T, 0); | |
151 | ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP); | |
152 | } | |
153 | } | |
154 | ||
155 | printk(KERN_DEBUG DRV_NAME ": active %d recovery %d setup %d.\n", | |
156 | t.active, t.recover, t.setup); | |
157 | if (t.recover > 16) { | |
158 | t.active += t.recover - 16; | |
159 | t.recover = 16; | |
160 | } | |
161 | if (t.active > 16) | |
162 | t.active = 16; | |
163 | ||
164 | /* Now convert the clocks into values we can actually stuff into | |
165 | the chip */ | |
166 | ||
167 | if (t.recover > 1) | |
168 | t.recover--; | |
169 | else | |
170 | t.recover = 15; | |
171 | ||
172 | if (t.setup > 4) | |
173 | t.setup = 0xC0; | |
174 | else | |
175 | t.setup = setup_data[t.setup]; | |
176 | ||
177 | t.active &= 0x0F; /* 0 = 16 */ | |
178 | ||
179 | /* Load setup timing */ | |
180 | pci_read_config_byte(pdev, arttim, ®); | |
181 | reg &= 0x3F; | |
182 | reg |= t.setup; | |
183 | pci_write_config_byte(pdev, arttim, reg); | |
184 | ||
185 | /* Load active/recovery */ | |
186 | pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover); | |
187 | } | |
188 | ||
189 | /** | |
190 | * cmd64x_set_dmamode - set initial DMA mode data | |
191 | * @ap: ATA interface | |
192 | * @adev: ATA device | |
193 | * | |
194 | * Called to do the DMA mode setup. | |
195 | */ | |
196 | ||
197 | static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev) | |
198 | { | |
199 | static const u8 udma_data[] = { | |
200 | 0x31, 0x21, 0x11, 0x25, 0x15, 0x05 | |
201 | }; | |
202 | static const u8 mwdma_data[] = { | |
203 | 0x30, 0x20, 0x10 | |
204 | }; | |
205 | ||
206 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
207 | u8 regU, regD; | |
208 | ||
209 | int pciU = UDIDETCR0 + 8 * ap->port_no; | |
210 | int pciD = BMIDESR0 + 8 * ap->port_no; | |
211 | int shift = 2 * adev->devno; | |
212 | ||
213 | pci_read_config_byte(pdev, pciD, ®D); | |
214 | pci_read_config_byte(pdev, pciU, ®U); | |
215 | ||
216 | regD &= ~(0x20 << shift); | |
217 | regU &= ~(0x35 << shift); | |
218 | ||
219 | if (adev->dma_mode >= XFER_UDMA_0) | |
220 | regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift; | |
221 | else | |
222 | regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift; | |
223 | ||
224 | regD |= 0x20 << adev->devno; | |
225 | ||
226 | pci_write_config_byte(pdev, pciU, regU); | |
227 | pci_write_config_byte(pdev, pciD, regD); | |
228 | } | |
229 | ||
230 | /** | |
231 | * cmd648_dma_stop - DMA stop callback | |
232 | * @qc: Command in progress | |
233 | * | |
234 | * DMA has completed. | |
235 | */ | |
236 | ||
237 | static void cmd648_bmdma_stop(struct ata_queued_cmd *qc) | |
238 | { | |
239 | struct ata_port *ap = qc->ap; | |
240 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
241 | u8 dma_intr; | |
242 | int dma_reg = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0; | |
243 | int dma_mask = ap->port_no ? ARTTIM2 : CFR; | |
244 | ||
245 | ata_bmdma_stop(qc); | |
246 | ||
247 | pci_read_config_byte(pdev, dma_reg, &dma_intr); | |
248 | pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask); | |
249 | } | |
250 | ||
251 | /** | |
252 | * cmd646r1_dma_stop - DMA stop callback | |
253 | * @qc: Command in progress | |
254 | * | |
255 | * Stub for now while investigating the r1 quirk in the old driver. | |
256 | */ | |
257 | ||
258 | static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc) | |
259 | { | |
260 | ata_bmdma_stop(qc); | |
261 | } | |
262 | ||
263 | static struct scsi_host_template cmd64x_sht = { | |
264 | .module = THIS_MODULE, | |
265 | .name = DRV_NAME, | |
266 | .ioctl = ata_scsi_ioctl, | |
267 | .queuecommand = ata_scsi_queuecmd, | |
268 | .can_queue = ATA_DEF_QUEUE, | |
269 | .this_id = ATA_SHT_THIS_ID, | |
270 | .sg_tablesize = LIBATA_MAX_PRD, | |
271 | .max_sectors = ATA_MAX_SECTORS, | |
272 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | |
273 | .emulated = ATA_SHT_EMULATED, | |
274 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
275 | .proc_name = DRV_NAME, | |
276 | .dma_boundary = ATA_DMA_BOUNDARY, | |
277 | .slave_configure = ata_scsi_slave_config, | |
278 | .bios_param = ata_std_bios_param, | |
279 | }; | |
280 | ||
281 | static struct ata_port_operations cmd64x_port_ops = { | |
282 | .port_disable = ata_port_disable, | |
283 | .set_piomode = cmd64x_set_piomode, | |
284 | .set_dmamode = cmd64x_set_dmamode, | |
285 | .mode_filter = ata_pci_default_filter, | |
286 | .tf_load = ata_tf_load, | |
287 | .tf_read = ata_tf_read, | |
288 | .check_status = ata_check_status, | |
289 | .exec_command = ata_exec_command, | |
290 | .dev_select = ata_std_dev_select, | |
291 | ||
292 | .freeze = ata_bmdma_freeze, | |
293 | .thaw = ata_bmdma_thaw, | |
294 | .error_handler = cmd64x_error_handler, | |
295 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
296 | ||
297 | .bmdma_setup = ata_bmdma_setup, | |
298 | .bmdma_start = ata_bmdma_start, | |
299 | .bmdma_stop = ata_bmdma_stop, | |
300 | .bmdma_status = ata_bmdma_status, | |
301 | ||
302 | .qc_prep = ata_qc_prep, | |
303 | .qc_issue = ata_qc_issue_prot, | |
304 | .eng_timeout = ata_eng_timeout, | |
305 | .data_xfer = ata_pio_data_xfer, | |
306 | ||
307 | .irq_handler = ata_interrupt, | |
308 | .irq_clear = ata_bmdma_irq_clear, | |
309 | ||
310 | .port_start = ata_port_start, | |
311 | .port_stop = ata_port_stop, | |
312 | .host_stop = ata_host_stop | |
313 | }; | |
314 | ||
315 | static struct ata_port_operations cmd646r1_port_ops = { | |
316 | .port_disable = ata_port_disable, | |
317 | .set_piomode = cmd64x_set_piomode, | |
318 | .set_dmamode = cmd64x_set_dmamode, | |
319 | .mode_filter = ata_pci_default_filter, | |
320 | .tf_load = ata_tf_load, | |
321 | .tf_read = ata_tf_read, | |
322 | .check_status = ata_check_status, | |
323 | .exec_command = ata_exec_command, | |
324 | .dev_select = ata_std_dev_select, | |
325 | ||
326 | .freeze = ata_bmdma_freeze, | |
327 | .thaw = ata_bmdma_thaw, | |
328 | .error_handler = cmd64x_error_handler, | |
329 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
330 | ||
331 | .bmdma_setup = ata_bmdma_setup, | |
332 | .bmdma_start = ata_bmdma_start, | |
333 | .bmdma_stop = cmd646r1_bmdma_stop, | |
334 | .bmdma_status = ata_bmdma_status, | |
335 | ||
336 | .qc_prep = ata_qc_prep, | |
337 | .qc_issue = ata_qc_issue_prot, | |
338 | .eng_timeout = ata_eng_timeout, | |
339 | .data_xfer = ata_pio_data_xfer, | |
340 | ||
341 | .irq_handler = ata_interrupt, | |
342 | .irq_clear = ata_bmdma_irq_clear, | |
343 | ||
344 | .port_start = ata_port_start, | |
345 | .port_stop = ata_port_stop, | |
346 | .host_stop = ata_host_stop | |
347 | }; | |
348 | ||
349 | static struct ata_port_operations cmd648_port_ops = { | |
350 | .port_disable = ata_port_disable, | |
351 | .set_piomode = cmd64x_set_piomode, | |
352 | .set_dmamode = cmd64x_set_dmamode, | |
353 | .mode_filter = ata_pci_default_filter, | |
354 | .tf_load = ata_tf_load, | |
355 | .tf_read = ata_tf_read, | |
356 | .check_status = ata_check_status, | |
357 | .exec_command = ata_exec_command, | |
358 | .dev_select = ata_std_dev_select, | |
359 | ||
360 | .freeze = ata_bmdma_freeze, | |
361 | .thaw = ata_bmdma_thaw, | |
362 | .error_handler = cmd648_error_handler, | |
363 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
364 | ||
365 | .bmdma_setup = ata_bmdma_setup, | |
366 | .bmdma_start = ata_bmdma_start, | |
367 | .bmdma_stop = cmd648_bmdma_stop, | |
368 | .bmdma_status = ata_bmdma_status, | |
369 | ||
370 | .qc_prep = ata_qc_prep, | |
371 | .qc_issue = ata_qc_issue_prot, | |
372 | .eng_timeout = ata_eng_timeout, | |
373 | .data_xfer = ata_pio_data_xfer, | |
374 | ||
375 | .irq_handler = ata_interrupt, | |
376 | .irq_clear = ata_bmdma_irq_clear, | |
377 | ||
378 | .port_start = ata_port_start, | |
379 | .port_stop = ata_port_stop, | |
380 | .host_stop = ata_host_stop | |
381 | }; | |
382 | ||
383 | static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id) | |
384 | { | |
385 | u32 class_rev; | |
386 | ||
387 | static struct ata_port_info cmd_info[6] = { | |
388 | { /* CMD 643 - no UDMA */ | |
389 | .sht = &cmd64x_sht, | |
390 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
391 | .pio_mask = 0x1f, | |
392 | .mwdma_mask = 0x07, | |
393 | .port_ops = &cmd64x_port_ops | |
394 | }, | |
395 | { /* CMD 646 with broken UDMA */ | |
396 | .sht = &cmd64x_sht, | |
397 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
398 | .pio_mask = 0x1f, | |
399 | .mwdma_mask = 0x07, | |
400 | .port_ops = &cmd64x_port_ops | |
401 | }, | |
402 | { /* CMD 646 with working UDMA */ | |
403 | .sht = &cmd64x_sht, | |
404 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
405 | .pio_mask = 0x1f, | |
406 | .mwdma_mask = 0x07, | |
407 | .udma_mask = ATA_UDMA1, | |
408 | .port_ops = &cmd64x_port_ops | |
409 | }, | |
410 | { /* CMD 646 rev 1 */ | |
411 | .sht = &cmd64x_sht, | |
412 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
413 | .pio_mask = 0x1f, | |
414 | .mwdma_mask = 0x07, | |
415 | .port_ops = &cmd646r1_port_ops | |
416 | }, | |
417 | { /* CMD 648 */ | |
418 | .sht = &cmd64x_sht, | |
419 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
420 | .pio_mask = 0x1f, | |
421 | .mwdma_mask = 0x07, | |
422 | .udma_mask = ATA_UDMA2, | |
423 | .port_ops = &cmd648_port_ops | |
424 | }, | |
425 | { /* CMD 649 */ | |
426 | .sht = &cmd64x_sht, | |
427 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
428 | .pio_mask = 0x1f, | |
429 | .mwdma_mask = 0x07, | |
430 | .udma_mask = ATA_UDMA3, | |
431 | .port_ops = &cmd648_port_ops | |
432 | } | |
433 | }; | |
434 | static struct ata_port_info *port_info[2], *info; | |
435 | u8 mrdmode; | |
436 | ||
437 | info = &cmd_info[id->driver_data]; | |
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 | info = &cmd_info[2]; | |
449 | /* Early rev with other problems ? */ | |
450 | else if (class_rev == 1) | |
451 | info = &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 | port_info[0] = port_info[1] = info; | |
468 | return ata_pci_init_one(pdev, port_info, 2); | |
469 | } | |
470 | ||
471 | static struct pci_device_id cmd64x[] = { | |
472 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
473 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, | |
474 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4}, | |
475 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5}, | |
476 | { 0, }, | |
477 | }; | |
478 | ||
479 | static struct pci_driver cmd64x_pci_driver = { | |
480 | .name = DRV_NAME, | |
481 | .id_table = cmd64x, | |
482 | .probe = cmd64x_init_one, | |
483 | .remove = ata_pci_remove_one | |
484 | }; | |
485 | ||
486 | static int __init cmd64x_init(void) | |
487 | { | |
488 | return pci_register_driver(&cmd64x_pci_driver); | |
489 | } | |
490 | ||
491 | ||
492 | static void __exit cmd64x_exit(void) | |
493 | { | |
494 | pci_unregister_driver(&cmd64x_pci_driver); | |
495 | } | |
496 | ||
497 | ||
498 | MODULE_AUTHOR("Alan Cox"); | |
499 | MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers"); | |
500 | MODULE_LICENSE("GPL"); | |
501 | MODULE_DEVICE_TABLE(pci, cmd64x); | |
502 | MODULE_VERSION(DRV_VERSION); | |
503 | ||
504 | module_init(cmd64x_init); | |
505 | module_exit(cmd64x_exit); |