2 * pata_cmd64x.c - CMD64x PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
7 * linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
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.
15 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
16 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
18 * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
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>
33 #define DRV_NAME "pata_cmd64x"
34 #define DRV_VERSION "0.2.2"
37 * CMD64x specific registers definition.
53 ARTTIM23_DIS_RA2 = 0x04,
54 ARTTIM23_DIS_RA3 = 0x08,
55 ARTTIM23_INTR_CH1 = 0x10,
64 MRDMODE_INTR_CH0 = 0x04,
65 MRDMODE_INTR_CH1 = 0x08,
66 MRDMODE_BLK_CH0 = 0x10,
67 MRDMODE_BLK_CH1 = 0x20,
78 static int cmd64x_pre_reset(struct ata_port *ap)
80 ap->cbl = ATA_CBL_PATA40;
81 return ata_std_prereset(ap);
84 static int cmd648_pre_reset(struct ata_port *ap)
86 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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;
94 ap->cbl = ATA_CBL_PATA40;
96 return ata_std_prereset(ap);
99 static void cmd64x_error_handler(struct ata_port *ap)
101 return ata_bmdma_drive_eh(ap, cmd64x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
104 static void cmd648_error_handler(struct ata_port *ap)
106 ata_bmdma_drive_eh(ap, cmd648_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
110 * cmd64x_set_piomode - set initial PIO mode data
114 * Called to do the PIO mode setup.
117 static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
119 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
121 const unsigned long T = 1000000 / 33;
122 const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
126 /* Port layout is not logical so use a table */
127 const u8 arttim_port[2][2] = {
128 { ARTTIM0, ARTTIM1 },
129 { ARTTIM23, ARTTIM23 }
131 const u8 drwtim_port[2][2] = {
132 { DRWTIM0, DRWTIM1 },
136 int arttim = arttim_port[ap->port_no][adev->devno];
137 int drwtim = drwtim_port[ap->port_no][adev->devno];
140 if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
141 printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
145 /* Slave has shared address setup */
146 struct ata_device *pair = ata_dev_pair(adev);
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);
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;
164 /* Now convert the clocks into values we can actually stuff into
175 t.setup = setup_data[t.setup];
177 t.active &= 0x0F; /* 0 = 16 */
179 /* Load setup timing */
180 pci_read_config_byte(pdev, arttim, ®);
183 pci_write_config_byte(pdev, arttim, reg);
185 /* Load active/recovery */
186 pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
190 * cmd64x_set_dmamode - set initial DMA mode data
194 * Called to do the DMA mode setup.
197 static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
199 static const u8 udma_data[] = {
200 0x30, 0x20, 0x10, 0x20, 0x10, 0x00
202 static const u8 mwdma_data[] = {
206 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
209 int pciU = UDIDETCR0 + 8 * ap->port_no;
210 int pciD = BMIDESR0 + 8 * ap->port_no;
211 int shift = 2 * adev->devno;
213 pci_read_config_byte(pdev, pciD, ®D);
214 pci_read_config_byte(pdev, pciU, ®U);
217 regD &= ~(0x20 << adev->devno);
218 /* DMA control bits */
219 regU &= ~(0x30 << shift);
220 /* DMA timing bits */
221 regU &= ~(0x05 << adev->devno);
223 if (adev->dma_mode >= XFER_UDMA_0) {
224 /* Merge thge timing value */
225 regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
226 /* Merge the control bits */
227 regU |= 1 << adev->devno; /* UDMA on */
228 if (adev->dma_mode > 2) /* 15nS timing */
229 regU |= 4 << adev->devno;
231 regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
233 regD |= 0x20 << adev->devno;
235 pci_write_config_byte(pdev, pciU, regU);
236 pci_write_config_byte(pdev, pciD, regD);
240 * cmd648_dma_stop - DMA stop callback
241 * @qc: Command in progress
246 static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
248 struct ata_port *ap = qc->ap;
249 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
251 int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
252 int dma_reg = ap->port_no ? ARTTIM2 : CFR;
256 pci_read_config_byte(pdev, dma_reg, &dma_intr);
257 pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
261 * cmd646r1_dma_stop - DMA stop callback
262 * @qc: Command in progress
264 * Stub for now while investigating the r1 quirk in the old driver.
267 static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
272 static struct scsi_host_template cmd64x_sht = {
273 .module = THIS_MODULE,
275 .ioctl = ata_scsi_ioctl,
276 .queuecommand = ata_scsi_queuecmd,
277 .can_queue = ATA_DEF_QUEUE,
278 .this_id = ATA_SHT_THIS_ID,
279 .sg_tablesize = LIBATA_MAX_PRD,
280 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
281 .emulated = ATA_SHT_EMULATED,
282 .use_clustering = ATA_SHT_USE_CLUSTERING,
283 .proc_name = DRV_NAME,
284 .dma_boundary = ATA_DMA_BOUNDARY,
285 .slave_configure = ata_scsi_slave_config,
286 .slave_destroy = ata_scsi_slave_destroy,
287 .bios_param = ata_std_bios_param,
289 .resume = ata_scsi_device_resume,
290 .suspend = ata_scsi_device_suspend,
294 static struct ata_port_operations cmd64x_port_ops = {
295 .port_disable = ata_port_disable,
296 .set_piomode = cmd64x_set_piomode,
297 .set_dmamode = cmd64x_set_dmamode,
298 .mode_filter = ata_pci_default_filter,
299 .tf_load = ata_tf_load,
300 .tf_read = ata_tf_read,
301 .check_status = ata_check_status,
302 .exec_command = ata_exec_command,
303 .dev_select = ata_std_dev_select,
305 .freeze = ata_bmdma_freeze,
306 .thaw = ata_bmdma_thaw,
307 .error_handler = cmd64x_error_handler,
308 .post_internal_cmd = ata_bmdma_post_internal_cmd,
310 .bmdma_setup = ata_bmdma_setup,
311 .bmdma_start = ata_bmdma_start,
312 .bmdma_stop = ata_bmdma_stop,
313 .bmdma_status = ata_bmdma_status,
315 .qc_prep = ata_qc_prep,
316 .qc_issue = ata_qc_issue_prot,
318 .data_xfer = ata_data_xfer,
320 .irq_handler = ata_interrupt,
321 .irq_clear = ata_bmdma_irq_clear,
322 .irq_on = ata_irq_on,
323 .irq_ack = ata_irq_ack,
325 .port_start = ata_port_start,
328 static struct ata_port_operations cmd646r1_port_ops = {
329 .port_disable = ata_port_disable,
330 .set_piomode = cmd64x_set_piomode,
331 .set_dmamode = cmd64x_set_dmamode,
332 .mode_filter = ata_pci_default_filter,
333 .tf_load = ata_tf_load,
334 .tf_read = ata_tf_read,
335 .check_status = ata_check_status,
336 .exec_command = ata_exec_command,
337 .dev_select = ata_std_dev_select,
339 .freeze = ata_bmdma_freeze,
340 .thaw = ata_bmdma_thaw,
341 .error_handler = cmd64x_error_handler,
342 .post_internal_cmd = ata_bmdma_post_internal_cmd,
344 .bmdma_setup = ata_bmdma_setup,
345 .bmdma_start = ata_bmdma_start,
346 .bmdma_stop = cmd646r1_bmdma_stop,
347 .bmdma_status = ata_bmdma_status,
349 .qc_prep = ata_qc_prep,
350 .qc_issue = ata_qc_issue_prot,
352 .data_xfer = ata_data_xfer,
354 .irq_handler = ata_interrupt,
355 .irq_clear = ata_bmdma_irq_clear,
356 .irq_on = ata_irq_on,
357 .irq_ack = ata_irq_ack,
359 .port_start = ata_port_start,
362 static struct ata_port_operations cmd648_port_ops = {
363 .port_disable = ata_port_disable,
364 .set_piomode = cmd64x_set_piomode,
365 .set_dmamode = cmd64x_set_dmamode,
366 .mode_filter = ata_pci_default_filter,
367 .tf_load = ata_tf_load,
368 .tf_read = ata_tf_read,
369 .check_status = ata_check_status,
370 .exec_command = ata_exec_command,
371 .dev_select = ata_std_dev_select,
373 .freeze = ata_bmdma_freeze,
374 .thaw = ata_bmdma_thaw,
375 .error_handler = cmd648_error_handler,
376 .post_internal_cmd = ata_bmdma_post_internal_cmd,
378 .bmdma_setup = ata_bmdma_setup,
379 .bmdma_start = ata_bmdma_start,
380 .bmdma_stop = cmd648_bmdma_stop,
381 .bmdma_status = ata_bmdma_status,
383 .qc_prep = ata_qc_prep,
384 .qc_issue = ata_qc_issue_prot,
386 .data_xfer = ata_data_xfer,
388 .irq_handler = ata_interrupt,
389 .irq_clear = ata_bmdma_irq_clear,
390 .irq_on = ata_irq_on,
391 .irq_ack = ata_irq_ack,
393 .port_start = ata_port_start,
396 static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
400 static struct ata_port_info cmd_info[6] = {
401 { /* CMD 643 - no UDMA */
403 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
406 .port_ops = &cmd64x_port_ops
408 { /* CMD 646 with broken UDMA */
410 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
413 .port_ops = &cmd64x_port_ops
415 { /* CMD 646 with working UDMA */
417 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
420 .udma_mask = ATA_UDMA1,
421 .port_ops = &cmd64x_port_ops
423 { /* CMD 646 rev 1 */
425 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
428 .port_ops = &cmd646r1_port_ops
432 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
435 .udma_mask = ATA_UDMA2,
436 .port_ops = &cmd648_port_ops
440 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
443 .udma_mask = ATA_UDMA3,
444 .port_ops = &cmd648_port_ops
447 static struct ata_port_info *port_info[2], *info;
450 info = &cmd_info[id->driver_data];
452 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
455 if (id->driver_data == 0) /* 643 */
456 ata_pci_clear_simplex(pdev);
458 if (pdev->device == PCI_DEVICE_ID_CMD_646) {
459 /* Does UDMA work ? */
462 /* Early rev with other problems ? */
463 else if (class_rev == 1)
467 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
468 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
469 mrdmode &= ~ 0x30; /* IRQ set up */
470 mrdmode |= 0x02; /* Memory read line enable */
471 pci_write_config_byte(pdev, MRDMODE, mrdmode);
473 /* Force PIO 0 here.. */
475 /* PPC specific fixup copied from old driver */
477 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
480 port_info[0] = port_info[1] = info;
481 return ata_pci_init_one(pdev, port_info, 2);
485 static int cmd64x_reinit_one(struct pci_dev *pdev)
488 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
489 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
490 mrdmode &= ~ 0x30; /* IRQ set up */
491 mrdmode |= 0x02; /* Memory read line enable */
492 pci_write_config_byte(pdev, MRDMODE, mrdmode);
494 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
496 return ata_pci_device_resume(pdev);
500 static const struct pci_device_id cmd64x[] = {
501 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
502 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
503 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
504 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
509 static struct pci_driver cmd64x_pci_driver = {
512 .probe = cmd64x_init_one,
513 .remove = ata_pci_remove_one,
515 .suspend = ata_pci_device_suspend,
516 .resume = cmd64x_reinit_one,
520 static int __init cmd64x_init(void)
522 return pci_register_driver(&cmd64x_pci_driver);
525 static void __exit cmd64x_exit(void)
527 pci_unregister_driver(&cmd64x_pci_driver);
530 MODULE_AUTHOR("Alan Cox");
531 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
532 MODULE_LICENSE("GPL");
533 MODULE_DEVICE_TABLE(pci, cmd64x);
534 MODULE_VERSION(DRV_VERSION);
536 module_init(cmd64x_init);
537 module_exit(cmd64x_exit);