2 * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
3 * Due to massive hardware bugs, UltraDMA is only supported
4 * on the 646U2 and not on the 646U.
6 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
9 * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
10 * Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/pci.h>
16 #include <linux/hdreg.h>
17 #include <linux/ide.h>
18 #include <linux/init.h>
22 #define DRV_NAME "cmd64x"
27 #define cmdprintk(x...) printk(x)
29 #define cmdprintk(x...)
33 * CMD64x specific registers definition.
36 #define CFR_INTR_CH0 0x04
44 #define ARTTIM23_DIS_RA2 0x04
45 #define ARTTIM23_DIS_RA3 0x08
46 #define ARTTIM23_INTR_CH1 0x10
53 #define MRDMODE_INTR_CH0 0x04
54 #define MRDMODE_INTR_CH1 0x08
55 #define UDIDETCR0 0x73
59 #define UDIDETCR1 0x7B
62 static u8 quantize_timing(int timing, int quant)
64 return (timing + quant - 1) / quant;
68 * This routine calculates active/recovery counts and then writes them into
69 * the chipset registers.
71 static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time)
73 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
74 int clock_time = 1000 / (ide_pci_clk ? ide_pci_clk : 33);
75 u8 cycle_count, active_count, recovery_count, drwtim;
76 static const u8 recovery_values[] =
77 {15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
78 static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3};
80 cmdprintk("program_cycle_times parameters: total=%d, active=%d\n",
81 cycle_time, active_time);
83 cycle_count = quantize_timing( cycle_time, clock_time);
84 active_count = quantize_timing(active_time, clock_time);
85 recovery_count = cycle_count - active_count;
88 * In case we've got too long recovery phase, try to lengthen
91 if (recovery_count > 16) {
92 active_count += recovery_count - 16;
95 if (active_count > 16) /* shouldn't actually happen... */
98 cmdprintk("Final counts: total=%d, active=%d, recovery=%d\n",
99 cycle_count, active_count, recovery_count);
102 * Convert values to internal chipset representation
104 recovery_count = recovery_values[recovery_count];
105 active_count &= 0x0f;
107 /* Program the active/recovery counts into the DRWTIM register */
108 drwtim = (active_count << 4) | recovery_count;
109 (void) pci_write_config_byte(dev, drwtim_regs[drive->dn], drwtim);
110 cmdprintk("Write 0x%02x to reg 0x%x\n", drwtim, drwtim_regs[drive->dn]);
114 * This routine writes into the chipset registers
115 * PIO setup/active/recovery timings.
117 static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
119 ide_hwif_t *hwif = HWIF(drive);
120 struct pci_dev *dev = to_pci_dev(hwif->dev);
121 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
122 unsigned int cycle_time;
123 u8 setup_count, arttim = 0;
125 static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
126 static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
128 cycle_time = ide_pio_cycle_time(drive, pio);
130 program_cycle_times(drive, cycle_time, t->active);
132 setup_count = quantize_timing(t->setup,
133 1000 / (ide_pci_clk ? ide_pci_clk : 33));
136 * The primary channel has individual address setup timing registers
137 * for each drive and the hardware selects the slowest timing itself.
138 * The secondary channel has one common register and we have to select
139 * the slowest address setup timing ourselves.
142 ide_drive_t *drives = hwif->drives;
144 drive->drive_data = setup_count;
145 setup_count = max(drives[0].drive_data, drives[1].drive_data);
148 if (setup_count > 5) /* shouldn't actually happen... */
150 cmdprintk("Final address setup count: %d\n", setup_count);
153 * Program the address setup clocks into the ARTTIM registers.
154 * Avoid clearing the secondary channel's interrupt bit.
156 (void) pci_read_config_byte (dev, arttim_regs[drive->dn], &arttim);
158 arttim &= ~ARTTIM23_INTR_CH1;
160 arttim |= setup_values[setup_count];
161 (void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
162 cmdprintk("Write 0x%02x to reg 0x%x\n", arttim, arttim_regs[drive->dn]);
166 * Attempts to set drive's PIO mode.
167 * Special cases are 8: prefetch off, 9: prefetch on (both never worked)
170 static void cmd64x_set_pio_mode(ide_drive_t *drive, const u8 pio)
173 * Filter out the prefetch control values
174 * to prevent PIO5 from being programmed
176 if (pio == 8 || pio == 9)
179 cmd64x_tune_pio(drive, pio);
182 static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
184 ide_hwif_t *hwif = HWIF(drive);
185 struct pci_dev *dev = to_pci_dev(hwif->dev);
186 u8 unit = drive->dn & 0x01;
187 u8 regU = 0, pciU = hwif->channel ? UDIDETCR1 : UDIDETCR0;
189 if (speed >= XFER_SW_DMA_0) {
190 (void) pci_read_config_byte(dev, pciU, ®U);
191 regU &= ~(unit ? 0xCA : 0x35);
196 regU |= unit ? 0x0A : 0x05;
199 regU |= unit ? 0x4A : 0x15;
202 regU |= unit ? 0x8A : 0x25;
205 regU |= unit ? 0x42 : 0x11;
208 regU |= unit ? 0x82 : 0x21;
211 regU |= unit ? 0xC2 : 0x31;
214 program_cycle_times(drive, 120, 70);
217 program_cycle_times(drive, 150, 80);
220 program_cycle_times(drive, 480, 215);
224 if (speed >= XFER_SW_DMA_0)
225 (void) pci_write_config_byte(dev, pciU, regU);
228 static int cmd648_dma_end(ide_drive_t *drive)
230 ide_hwif_t *hwif = HWIF(drive);
231 unsigned long base = hwif->dma_base - (hwif->channel * 8);
232 int err = __ide_dma_end(drive);
233 u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 :
235 u8 mrdmode = inb(base + 1);
237 /* clear the interrupt bit */
238 outb((mrdmode & ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1)) | irq_mask,
244 static int cmd64x_dma_end(ide_drive_t *drive)
246 ide_hwif_t *hwif = HWIF(drive);
247 struct pci_dev *dev = to_pci_dev(hwif->dev);
248 int irq_reg = hwif->channel ? ARTTIM23 : CFR;
249 u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 :
252 int err = __ide_dma_end(drive);
254 (void) pci_read_config_byte(dev, irq_reg, &irq_stat);
255 /* clear the interrupt bit */
256 (void) pci_write_config_byte(dev, irq_reg, irq_stat | irq_mask);
261 static int cmd648_dma_test_irq(ide_drive_t *drive)
263 ide_hwif_t *hwif = HWIF(drive);
264 unsigned long base = hwif->dma_base - (hwif->channel * 8);
265 u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 :
267 u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
268 u8 mrdmode = inb(base + 1);
271 printk("%s: dma_stat: 0x%02x mrdmode: 0x%02x irq_mask: 0x%02x\n",
272 drive->name, dma_stat, mrdmode, irq_mask);
274 if (!(mrdmode & irq_mask))
277 /* return 1 if INTR asserted */
284 static int cmd64x_dma_test_irq(ide_drive_t *drive)
286 ide_hwif_t *hwif = HWIF(drive);
287 struct pci_dev *dev = to_pci_dev(hwif->dev);
288 int irq_reg = hwif->channel ? ARTTIM23 : CFR;
289 u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 :
291 u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
294 (void) pci_read_config_byte(dev, irq_reg, &irq_stat);
297 printk("%s: dma_stat: 0x%02x irq_stat: 0x%02x irq_mask: 0x%02x\n",
298 drive->name, dma_stat, irq_stat, irq_mask);
300 if (!(irq_stat & irq_mask))
303 /* return 1 if INTR asserted */
311 * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old
312 * event order for DMA transfers.
315 static int cmd646_1_dma_end(ide_drive_t *drive)
317 ide_hwif_t *hwif = HWIF(drive);
318 u8 dma_stat = 0, dma_cmd = 0;
320 drive->waiting_for_dma = 0;
322 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
323 /* read DMA command state */
324 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
326 outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
327 /* clear the INTR & ERROR bits */
328 outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
329 /* and free any DMA resources */
330 ide_destroy_dmatable(drive);
331 /* verify good DMA status */
332 return (dma_stat & 7) != 4;
335 static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev)
339 /* Set a good latency timer and cache line size value. */
340 (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
341 /* FIXME: pci_set_master() to ensure a good latency timer value */
344 * Enable interrupts, select MEMORY READ LINE for reads.
346 * NOTE: although not mentioned in the PCI0646U specs,
347 * bits 0-1 are write only and won't be read back as
348 * set or not -- PCI0646U2 specs clarify this point.
350 (void) pci_read_config_byte (dev, MRDMODE, &mrdmode);
352 (void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02));
357 static u8 cmd64x_cable_detect(ide_hwif_t *hwif)
359 struct pci_dev *dev = to_pci_dev(hwif->dev);
360 u8 bmidecsr = 0, mask = hwif->channel ? 0x02 : 0x01;
362 switch (dev->device) {
363 case PCI_DEVICE_ID_CMD_648:
364 case PCI_DEVICE_ID_CMD_649:
365 pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
366 return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
368 return ATA_CBL_PATA40;
372 static const struct ide_port_ops cmd64x_port_ops = {
373 .set_pio_mode = cmd64x_set_pio_mode,
374 .set_dma_mode = cmd64x_set_dma_mode,
375 .cable_detect = cmd64x_cable_detect,
378 static const struct ide_dma_ops cmd64x_dma_ops = {
379 .dma_host_set = ide_dma_host_set,
380 .dma_setup = ide_dma_setup,
381 .dma_exec_cmd = ide_dma_exec_cmd,
382 .dma_start = ide_dma_start,
383 .dma_end = cmd64x_dma_end,
384 .dma_test_irq = cmd64x_dma_test_irq,
385 .dma_lost_irq = ide_dma_lost_irq,
386 .dma_timeout = ide_dma_timeout,
389 static const struct ide_dma_ops cmd646_rev1_dma_ops = {
390 .dma_host_set = ide_dma_host_set,
391 .dma_setup = ide_dma_setup,
392 .dma_exec_cmd = ide_dma_exec_cmd,
393 .dma_start = ide_dma_start,
394 .dma_end = cmd646_1_dma_end,
395 .dma_test_irq = ide_dma_test_irq,
396 .dma_lost_irq = ide_dma_lost_irq,
397 .dma_timeout = ide_dma_timeout,
400 static const struct ide_dma_ops cmd648_dma_ops = {
401 .dma_host_set = ide_dma_host_set,
402 .dma_setup = ide_dma_setup,
403 .dma_exec_cmd = ide_dma_exec_cmd,
404 .dma_start = ide_dma_start,
405 .dma_end = cmd648_dma_end,
406 .dma_test_irq = cmd648_dma_test_irq,
407 .dma_lost_irq = ide_dma_lost_irq,
408 .dma_timeout = ide_dma_timeout,
411 static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
414 .init_chipset = init_chipset_cmd64x,
415 .enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
416 .port_ops = &cmd64x_port_ops,
417 .dma_ops = &cmd64x_dma_ops,
418 .host_flags = IDE_HFLAG_CLEAR_SIMPLEX |
419 IDE_HFLAG_ABUSE_PREFETCH,
420 .pio_mask = ATA_PIO5,
421 .mwdma_mask = ATA_MWDMA2,
422 .udma_mask = 0x00, /* no udma */
426 .init_chipset = init_chipset_cmd64x,
427 .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
428 .chipset = ide_cmd646,
429 .port_ops = &cmd64x_port_ops,
430 .dma_ops = &cmd648_dma_ops,
431 .host_flags = IDE_HFLAG_ABUSE_PREFETCH,
432 .pio_mask = ATA_PIO5,
433 .mwdma_mask = ATA_MWDMA2,
434 .udma_mask = ATA_UDMA2,
438 .init_chipset = init_chipset_cmd64x,
439 .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
440 .port_ops = &cmd64x_port_ops,
441 .dma_ops = &cmd648_dma_ops,
442 .host_flags = IDE_HFLAG_ABUSE_PREFETCH,
443 .pio_mask = ATA_PIO5,
444 .mwdma_mask = ATA_MWDMA2,
445 .udma_mask = ATA_UDMA4,
449 .init_chipset = init_chipset_cmd64x,
450 .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
451 .port_ops = &cmd64x_port_ops,
452 .dma_ops = &cmd648_dma_ops,
453 .host_flags = IDE_HFLAG_ABUSE_PREFETCH,
454 .pio_mask = ATA_PIO5,
455 .mwdma_mask = ATA_MWDMA2,
456 .udma_mask = ATA_UDMA5,
460 static int __devinit cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
462 struct ide_port_info d;
463 u8 idx = id->driver_data;
465 d = cmd64x_chipsets[idx];
469 * UltraDMA only supported on PCI646U and PCI646U2, which
470 * correspond to revisions 0x03, 0x05 and 0x07 respectively.
471 * Actually, although the CMD tech support people won't
472 * tell me the details, the 0x03 revision cannot support
473 * UDMA correctly without hardware modifications, and even
474 * then it only works with Quantum disks due to some
475 * hold time assumptions in the 646U part which are fixed
478 * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
480 if (dev->revision < 5) {
483 * The original PCI0646 didn't have the primary
484 * channel enable bit, it appeared starting with
485 * PCI0646U (i.e. revision ID 3).
487 if (dev->revision < 3) {
488 d.enablebits[0].reg = 0;
489 if (dev->revision == 1)
490 d.dma_ops = &cmd646_rev1_dma_ops;
492 d.dma_ops = &cmd64x_dma_ops;
497 return ide_pci_init_one(dev, &d, NULL);
500 static const struct pci_device_id cmd64x_pci_tbl[] = {
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), 2 },
504 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 3 },
507 MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl);
509 static struct pci_driver driver = {
510 .name = "CMD64x_IDE",
511 .id_table = cmd64x_pci_tbl,
512 .probe = cmd64x_init_one,
513 .remove = ide_pci_remove,
516 static int __init cmd64x_ide_init(void)
518 return ide_pci_register_driver(&driver);
521 static void __exit cmd64x_ide_exit(void)
523 pci_unregister_driver(&driver);
526 module_init(cmd64x_ide_init);
527 module_exit(cmd64x_ide_exit);
529 MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick");
530 MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
531 MODULE_LICENSE("GPL");