2 * pata_cmd64x.c - CMD64x PATA for new ATA layer
4 * Alan Cox <alan@lxorguk.ukuu.org.uk>
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 "0.2.5"
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 PIO and MWDMA timing
96 * Called to do the PIO and MWDMA mode setup.
99 static void cmd64x_set_timing(struct ata_port *ap, struct ata_device *adev, u8 mode)
101 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
103 const unsigned long T = 1000000 / 33;
104 const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
108 /* Port layout is not logical so use a table */
109 const u8 arttim_port[2][2] = {
110 { ARTTIM0, ARTTIM1 },
111 { ARTTIM23, ARTTIM23 }
113 const u8 drwtim_port[2][2] = {
114 { DRWTIM0, DRWTIM1 },
118 int arttim = arttim_port[ap->port_no][adev->devno];
119 int drwtim = drwtim_port[ap->port_no][adev->devno];
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");
128 /* Slave has shared address setup */
129 struct ata_device *pair = ata_dev_pair(adev);
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);
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;
147 /* Now convert the clocks into values we can actually stuff into
158 t.setup = setup_data[t.setup];
160 t.active &= 0x0F; /* 0 = 16 */
162 /* Load setup timing */
163 pci_read_config_byte(pdev, arttim, ®);
166 pci_write_config_byte(pdev, arttim, reg);
168 /* Load active/recovery */
169 pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
173 * cmd64x_set_piomode - set initial PIO mode data
177 * Used when configuring the devices ot set the PIO timings. All the
178 * actual work is done by the PIO/MWDMA setting helper
181 static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
183 cmd64x_set_timing(ap, adev, adev->pio_mode);
187 * cmd64x_set_dmamode - set initial DMA mode data
191 * Called to do the DMA mode setup.
194 static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
196 static const u8 udma_data[] = {
197 0x30, 0x20, 0x10, 0x20, 0x10, 0x00
200 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
203 int pciU = UDIDETCR0 + 8 * ap->port_no;
204 int pciD = BMIDESR0 + 8 * ap->port_no;
205 int shift = 2 * adev->devno;
207 pci_read_config_byte(pdev, pciD, ®D);
208 pci_read_config_byte(pdev, pciU, ®U);
211 regD &= ~(0x20 << adev->devno);
212 /* DMA control bits */
213 regU &= ~(0x30 << shift);
214 /* DMA timing bits */
215 regU &= ~(0x05 << adev->devno);
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;
225 regU &= ~ (1 << adev->devno); /* UDMA off */
226 cmd64x_set_timing(ap, adev, adev->dma_mode);
229 regD |= 0x20 << adev->devno;
231 pci_write_config_byte(pdev, pciU, regU);
232 pci_write_config_byte(pdev, pciD, regD);
236 * cmd648_dma_stop - DMA stop callback
237 * @qc: Command in progress
242 static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
244 struct ata_port *ap = qc->ap;
245 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
247 int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
248 int dma_reg = ap->port_no ? ARTTIM2 : CFR;
252 pci_read_config_byte(pdev, dma_reg, &dma_intr);
253 pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
257 * cmd646r1_dma_stop - DMA stop callback
258 * @qc: Command in progress
260 * Stub for now while investigating the r1 quirk in the old driver.
263 static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
268 static struct scsi_host_template cmd64x_sht = {
269 ATA_BMDMA_SHT(DRV_NAME),
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,
278 static struct ata_port_operations cmd64x_port_ops = {
279 .inherits = &cmd64x_base_ops,
280 .cable_detect = ata_cable_40wire,
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,
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,
295 static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
299 static const struct ata_port_info cmd_info[6] = {
300 { /* CMD 643 - no UDMA */
301 .flags = ATA_FLAG_SLAVE_POSS,
304 .port_ops = &cmd64x_port_ops
306 { /* CMD 646 with broken UDMA */
307 .flags = ATA_FLAG_SLAVE_POSS,
310 .port_ops = &cmd64x_port_ops
312 { /* CMD 646 with working UDMA */
313 .flags = ATA_FLAG_SLAVE_POSS,
316 .udma_mask = ATA_UDMA2,
317 .port_ops = &cmd64x_port_ops
319 { /* CMD 646 rev 1 */
320 .flags = ATA_FLAG_SLAVE_POSS,
323 .port_ops = &cmd646r1_port_ops
326 .flags = ATA_FLAG_SLAVE_POSS,
329 .udma_mask = ATA_UDMA4,
330 .port_ops = &cmd648_port_ops
333 .flags = ATA_FLAG_SLAVE_POSS,
336 .udma_mask = ATA_UDMA5,
337 .port_ops = &cmd648_port_ops
340 const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
344 rc = pcim_enable_device(pdev);
348 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
351 if (id->driver_data == 0) /* 643 */
352 ata_pci_bmdma_clear_simplex(pdev);
354 if (pdev->device == PCI_DEVICE_ID_CMD_646) {
355 /* Does UDMA work ? */
357 ppi[0] = &cmd_info[2];
358 /* Early rev with other problems ? */
359 else if (class_rev == 1)
360 ppi[0] = &cmd_info[3];
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);
369 /* Force PIO 0 here.. */
371 /* PPC specific fixup copied from old driver */
373 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
376 return ata_pci_sff_init_one(pdev, ppi, &cmd64x_sht, NULL);
380 static int cmd64x_reinit_one(struct pci_dev *pdev)
382 struct ata_host *host = dev_get_drvdata(&pdev->dev);
386 rc = ata_pci_device_do_resume(pdev);
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);
396 pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
398 ata_host_resume(host);
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 },
412 static struct pci_driver cmd64x_pci_driver = {
415 .probe = cmd64x_init_one,
416 .remove = ata_pci_remove_one,
418 .suspend = ata_pci_device_suspend,
419 .resume = cmd64x_reinit_one,
423 static int __init cmd64x_init(void)
425 return pci_register_driver(&cmd64x_pci_driver);
428 static void __exit cmd64x_exit(void)
430 pci_unregister_driver(&cmd64x_pci_driver);
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);
439 module_init(cmd64x_init);
440 module_exit(cmd64x_exit);