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 "0.2.3"
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 cmd648_cable_detect(struct ata_port *ap)
80 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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;
91 * cmd64x_set_piomode - set initial PIO mode data
95 * Called to do the PIO mode setup.
98 static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
100 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
102 const unsigned long T = 1000000 / 33;
103 const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
107 /* Port layout is not logical so use a table */
108 const u8 arttim_port[2][2] = {
109 { ARTTIM0, ARTTIM1 },
110 { ARTTIM23, ARTTIM23 }
112 const u8 drwtim_port[2][2] = {
113 { DRWTIM0, DRWTIM1 },
117 int arttim = arttim_port[ap->port_no][adev->devno];
118 int drwtim = drwtim_port[ap->port_no][adev->devno];
121 if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
122 printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
126 /* Slave has shared address setup */
127 struct ata_device *pair = ata_dev_pair(adev);
130 struct ata_timing tp;
131 ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
132 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
136 printk(KERN_DEBUG DRV_NAME ": active %d recovery %d setup %d.\n",
137 t.active, t.recover, t.setup);
138 if (t.recover > 16) {
139 t.active += t.recover - 16;
145 /* Now convert the clocks into values we can actually stuff into
156 t.setup = setup_data[t.setup];
158 t.active &= 0x0F; /* 0 = 16 */
160 /* Load setup timing */
161 pci_read_config_byte(pdev, arttim, ®);
164 pci_write_config_byte(pdev, arttim, reg);
166 /* Load active/recovery */
167 pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
171 * cmd64x_set_dmamode - set initial DMA mode data
175 * Called to do the DMA mode setup.
178 static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
180 static const u8 udma_data[] = {
181 0x30, 0x20, 0x10, 0x20, 0x10, 0x00
183 static const u8 mwdma_data[] = {
187 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
190 int pciU = UDIDETCR0 + 8 * ap->port_no;
191 int pciD = BMIDESR0 + 8 * ap->port_no;
192 int shift = 2 * adev->devno;
194 pci_read_config_byte(pdev, pciD, ®D);
195 pci_read_config_byte(pdev, pciU, ®U);
198 regD &= ~(0x20 << adev->devno);
199 /* DMA control bits */
200 regU &= ~(0x30 << shift);
201 /* DMA timing bits */
202 regU &= ~(0x05 << adev->devno);
204 if (adev->dma_mode >= XFER_UDMA_0) {
205 /* Merge thge timing value */
206 regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
207 /* Merge the control bits */
208 regU |= 1 << adev->devno; /* UDMA on */
209 if (adev->dma_mode > 2) /* 15nS timing */
210 regU |= 4 << adev->devno;
212 regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
214 regD |= 0x20 << adev->devno;
216 pci_write_config_byte(pdev, pciU, regU);
217 pci_write_config_byte(pdev, pciD, regD);
221 * cmd648_dma_stop - DMA stop callback
222 * @qc: Command in progress
227 static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
229 struct ata_port *ap = qc->ap;
230 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
232 int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
233 int dma_reg = ap->port_no ? ARTTIM2 : CFR;
237 pci_read_config_byte(pdev, dma_reg, &dma_intr);
238 pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
242 * cmd646r1_dma_stop - DMA stop callback
243 * @qc: Command in progress
245 * Stub for now while investigating the r1 quirk in the old driver.
248 static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
253 static struct scsi_host_template cmd64x_sht = {
254 .module = THIS_MODULE,
256 .ioctl = ata_scsi_ioctl,
257 .queuecommand = ata_scsi_queuecmd,
258 .can_queue = ATA_DEF_QUEUE,
259 .this_id = ATA_SHT_THIS_ID,
260 .sg_tablesize = LIBATA_MAX_PRD,
261 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
262 .emulated = ATA_SHT_EMULATED,
263 .use_clustering = ATA_SHT_USE_CLUSTERING,
264 .proc_name = DRV_NAME,
265 .dma_boundary = ATA_DMA_BOUNDARY,
266 .slave_configure = ata_scsi_slave_config,
267 .slave_destroy = ata_scsi_slave_destroy,
268 .bios_param = ata_std_bios_param,
271 static struct ata_port_operations cmd64x_port_ops = {
272 .port_disable = ata_port_disable,
273 .set_piomode = cmd64x_set_piomode,
274 .set_dmamode = cmd64x_set_dmamode,
275 .mode_filter = ata_pci_default_filter,
276 .tf_load = ata_tf_load,
277 .tf_read = ata_tf_read,
278 .check_status = ata_check_status,
279 .exec_command = ata_exec_command,
280 .dev_select = ata_std_dev_select,
282 .freeze = ata_bmdma_freeze,
283 .thaw = ata_bmdma_thaw,
284 .error_handler = ata_bmdma_error_handler,
285 .post_internal_cmd = ata_bmdma_post_internal_cmd,
286 .cable_detect = ata_cable_40wire,
288 .bmdma_setup = ata_bmdma_setup,
289 .bmdma_start = ata_bmdma_start,
290 .bmdma_stop = ata_bmdma_stop,
291 .bmdma_status = ata_bmdma_status,
293 .qc_prep = ata_qc_prep,
294 .qc_issue = ata_qc_issue_prot,
296 .data_xfer = ata_data_xfer,
298 .irq_handler = ata_interrupt,
299 .irq_clear = ata_bmdma_irq_clear,
300 .irq_on = ata_irq_on,
301 .irq_ack = ata_irq_ack,
303 .port_start = ata_port_start,
306 static struct ata_port_operations cmd646r1_port_ops = {
307 .port_disable = ata_port_disable,
308 .set_piomode = cmd64x_set_piomode,
309 .set_dmamode = cmd64x_set_dmamode,
310 .mode_filter = ata_pci_default_filter,
311 .tf_load = ata_tf_load,
312 .tf_read = ata_tf_read,
313 .check_status = ata_check_status,
314 .exec_command = ata_exec_command,
315 .dev_select = ata_std_dev_select,
317 .freeze = ata_bmdma_freeze,
318 .thaw = ata_bmdma_thaw,
319 .error_handler = ata_bmdma_error_handler,
320 .post_internal_cmd = ata_bmdma_post_internal_cmd,
321 .cable_detect = ata_cable_40wire,
323 .bmdma_setup = ata_bmdma_setup,
324 .bmdma_start = ata_bmdma_start,
325 .bmdma_stop = cmd646r1_bmdma_stop,
326 .bmdma_status = ata_bmdma_status,
328 .qc_prep = ata_qc_prep,
329 .qc_issue = ata_qc_issue_prot,
331 .data_xfer = ata_data_xfer,
333 .irq_handler = ata_interrupt,
334 .irq_clear = ata_bmdma_irq_clear,
335 .irq_on = ata_irq_on,
336 .irq_ack = ata_irq_ack,
338 .port_start = ata_port_start,
341 static struct ata_port_operations cmd648_port_ops = {
342 .port_disable = ata_port_disable,
343 .set_piomode = cmd64x_set_piomode,
344 .set_dmamode = cmd64x_set_dmamode,
345 .mode_filter = ata_pci_default_filter,
346 .tf_load = ata_tf_load,
347 .tf_read = ata_tf_read,
348 .check_status = ata_check_status,
349 .exec_command = ata_exec_command,
350 .dev_select = ata_std_dev_select,
352 .freeze = ata_bmdma_freeze,
353 .thaw = ata_bmdma_thaw,
354 .error_handler = ata_bmdma_error_handler,
355 .post_internal_cmd = ata_bmdma_post_internal_cmd,
356 .cable_detect = cmd648_cable_detect,
358 .bmdma_setup = ata_bmdma_setup,
359 .bmdma_start = ata_bmdma_start,
360 .bmdma_stop = cmd648_bmdma_stop,
361 .bmdma_status = ata_bmdma_status,
363 .qc_prep = ata_qc_prep,
364 .qc_issue = ata_qc_issue_prot,
366 .data_xfer = ata_data_xfer,
368 .irq_handler = ata_interrupt,
369 .irq_clear = ata_bmdma_irq_clear,
370 .irq_on = ata_irq_on,
371 .irq_ack = ata_irq_ack,
373 .port_start = ata_port_start,
376 static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
380 static const struct ata_port_info cmd_info[6] = {
381 { /* CMD 643 - no UDMA */
383 .flags = ATA_FLAG_SLAVE_POSS,
386 .port_ops = &cmd64x_port_ops
388 { /* CMD 646 with broken UDMA */
390 .flags = ATA_FLAG_SLAVE_POSS,
393 .port_ops = &cmd64x_port_ops
395 { /* CMD 646 with working UDMA */
397 .flags = ATA_FLAG_SLAVE_POSS,
400 .udma_mask = ATA_UDMA1,
401 .port_ops = &cmd64x_port_ops
403 { /* CMD 646 rev 1 */
405 .flags = ATA_FLAG_SLAVE_POSS,
408 .port_ops = &cmd646r1_port_ops
412 .flags = ATA_FLAG_SLAVE_POSS,
415 .udma_mask = ATA_UDMA2,
416 .port_ops = &cmd648_port_ops
420 .flags = ATA_FLAG_SLAVE_POSS,
423 .udma_mask = ATA_UDMA3,
424 .port_ops = &cmd648_port_ops
427 const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
430 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
433 if (id->driver_data == 0) /* 643 */
434 ata_pci_clear_simplex(pdev);
436 if (pdev->device == PCI_DEVICE_ID_CMD_646) {
437 /* Does UDMA work ? */
439 ppi[0] = &cmd_info[2];
440 /* Early rev with other problems ? */
441 else if (class_rev == 1)
442 ppi[0] = &cmd_info[3];
445 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
446 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
447 mrdmode &= ~ 0x30; /* IRQ set up */
448 mrdmode |= 0x02; /* Memory read line enable */
449 pci_write_config_byte(pdev, MRDMODE, mrdmode);
451 /* Force PIO 0 here.. */
453 /* PPC specific fixup copied from old driver */
455 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
458 return ata_pci_init_one(pdev, ppi);
462 static int cmd64x_reinit_one(struct pci_dev *pdev)
465 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
466 pci_read_config_byte(pdev, MRDMODE, &mrdmode);
467 mrdmode &= ~ 0x30; /* IRQ set up */
468 mrdmode |= 0x02; /* Memory read line enable */
469 pci_write_config_byte(pdev, MRDMODE, mrdmode);
471 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
473 return ata_pci_device_resume(pdev);
477 static const struct pci_device_id cmd64x[] = {
478 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
479 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
480 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
481 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
486 static struct pci_driver cmd64x_pci_driver = {
489 .probe = cmd64x_init_one,
490 .remove = ata_pci_remove_one,
492 .suspend = ata_pci_device_suspend,
493 .resume = cmd64x_reinit_one,
497 static int __init cmd64x_init(void)
499 return pci_register_driver(&cmd64x_pci_driver);
502 static void __exit cmd64x_exit(void)
504 pci_unregister_driver(&cmd64x_pci_driver);
507 MODULE_AUTHOR("Alan Cox");
508 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
509 MODULE_LICENSE("GPL");
510 MODULE_DEVICE_TABLE(pci, cmd64x);
511 MODULE_VERSION(DRV_VERSION);
513 module_init(cmd64x_init);
514 module_exit(cmd64x_exit);