5 * VIA IDE driver for Linux. Supported southbridges:
7 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
8 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
9 * vt8235, vt8237, vt8237a
11 * Copyright (c) 2000-2002 Vojtech Pavlik
12 * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
14 * Based on the work of:
20 * Obsolete device documentation publically available from via.com.tw
21 * Current device documentation available under NDA only
25 * This program is free software; you can redistribute it and/or modify it
26 * under the terms of the GNU General Public License version 2 as published by
27 * the Free Software Foundation.
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/ioport.h>
33 #include <linux/blkdev.h>
34 #include <linux/pci.h>
35 #include <linux/init.h>
36 #include <linux/ide.h>
37 #include <linux/dmi.h>
41 #ifdef CONFIG_PPC_CHRP
42 #include <asm/processor.h>
45 #include "ide-timing.h"
47 #define VIA_IDE_ENABLE 0x40
48 #define VIA_IDE_CONFIG 0x41
49 #define VIA_FIFO_CONFIG 0x43
50 #define VIA_MISC_1 0x44
51 #define VIA_MISC_2 0x45
52 #define VIA_MISC_3 0x46
53 #define VIA_DRIVE_TIMING 0x48
54 #define VIA_8BIT_TIMING 0x4e
55 #define VIA_ADDRESS_SETUP 0x4c
56 #define VIA_UDMA_TIMING 0x50
58 #define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */
59 #define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */
60 #define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */
61 #define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */
62 #define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */
63 #define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */
66 * VIA SouthBridge chips.
69 static struct via_isa_bridge {
76 } via_isa_bridges[] = {
77 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
78 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
79 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
80 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
81 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
82 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
83 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
84 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
85 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
86 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
87 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
88 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
89 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
90 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
91 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
92 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
93 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
94 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
95 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
96 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
97 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
98 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
99 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
100 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
104 static unsigned int via_clock;
105 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
109 struct via_isa_bridge *via_config;
110 unsigned int via_80w;
114 * via_set_speed - write timing registers
117 * @timing: IDE timing data to use
119 * via_set_speed writes timing values to the chipset registers
122 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
124 struct pci_dev *dev = hwif->pci_dev;
125 struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
128 if (~vdev->via_config->flags & VIA_BAD_AST) {
129 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
130 t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
131 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
134 pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
135 ((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
137 pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
138 ((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));
140 switch (vdev->via_config->udma_mask) {
141 case ATA_UDMA2: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
142 case ATA_UDMA4: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break;
143 case ATA_UDMA5: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
144 case ATA_UDMA6: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
148 pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
152 * via_set_drive - configure transfer mode
153 * @drive: Drive to set up
154 * @speed: desired speed
156 * via_set_drive() computes timing values configures the drive and
157 * the chipset to a desired transfer mode. It also can be called
161 static int via_set_drive(ide_drive_t *drive, const u8 speed)
163 ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
164 struct via82cxxx_dev *vdev = pci_get_drvdata(drive->hwif->pci_dev);
165 struct ide_timing t, p;
168 if (speed != XFER_PIO_SLOW)
169 ide_config_drive_speed(drive, speed);
171 T = 1000000000 / via_clock;
173 switch (vdev->via_config->udma_mask) {
174 case ATA_UDMA2: UT = T; break;
175 case ATA_UDMA4: UT = T/2; break;
176 case ATA_UDMA5: UT = T/3; break;
177 case ATA_UDMA6: UT = T/4; break;
181 ide_timing_compute(drive, speed, &t, T, UT);
184 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
185 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
188 via_set_speed(HWIF(drive), drive->dn, &t);
190 if (!drive->init_speed)
191 drive->init_speed = speed;
192 drive->current_speed = speed;
198 * via_set_pio_mode - PIO setup
200 * @pio: PIO mode number
202 * A callback from the upper layers for PIO-only tuning.
205 static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
207 via_set_drive(drive, XFER_PIO_0 + pio);
211 * via82cxxx_ide_dma_check - set up for DMA if possible
212 * @drive: IDE drive to set up
214 * Set up the drive for the highest supported speed considering the
215 * driver, controller and cable
218 static int via82cxxx_ide_dma_check (ide_drive_t *drive)
220 if (ide_tune_dma(drive))
223 ide_set_max_pio(drive);
228 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
230 struct via_isa_bridge *via_config;
232 for (via_config = via_isa_bridges; via_config->id; via_config++)
233 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
234 !!(via_config->flags & VIA_BAD_ID),
235 via_config->id, NULL))) {
237 if ((*isa)->revision >= via_config->rev_min &&
238 (*isa)->revision <= via_config->rev_max)
247 * Check and handle 80-wire cable presence
249 static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
253 switch (vdev->via_config->udma_mask) {
255 for (i = 24; i >= 0; i -= 8)
256 if (((u >> (i & 16)) & 8) &&
258 (((u >> i) & 7) < 2)) {
263 vdev->via_80w |= (1 << (1 - (i >> 4)));
268 for (i = 24; i >= 0; i -= 8)
269 if (((u >> i) & 0x10) ||
270 (((u >> i) & 0x20) &&
271 (((u >> i) & 7) < 4))) {
272 /* BIOS 80-wire bit or
273 * UDMA w/ < 60ns/cycle
275 vdev->via_80w |= (1 << (1 - (i >> 4)));
280 for (i = 24; i >= 0; i -= 8)
281 if (((u >> i) & 0x10) ||
282 (((u >> i) & 0x20) &&
283 (((u >> i) & 7) < 6))) {
284 /* BIOS 80-wire bit or
285 * UDMA w/ < 60ns/cycle
287 vdev->via_80w |= (1 << (1 - (i >> 4)));
294 * init_chipset_via82cxxx - initialization handler
296 * @name: Name of interface
298 * The initialization callback. Here we determine the IDE chip type
299 * and initialize its drive independent registers.
302 static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
304 struct pci_dev *isa = NULL;
305 struct via82cxxx_dev *vdev;
306 struct via_isa_bridge *via_config;
310 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
312 printk(KERN_ERR "VP_IDE: out of memory :(\n");
315 pci_set_drvdata(dev, vdev);
318 * Find the ISA bridge to see how good the IDE is.
320 vdev->via_config = via_config = via_config_find(&isa);
322 /* We checked this earlier so if it fails here deeep badness
325 BUG_ON(!via_config->id);
328 * Detect cable and configure Clk66
330 pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
332 via_cable_detect(vdev, u);
334 if (via_config->udma_mask == ATA_UDMA4) {
336 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
337 } else if (via_config->flags & VIA_BAD_CLK66) {
338 /* Would cause trouble on 596a and 686 */
339 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
343 * Check whether interfaces are enabled.
346 pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
349 * Set up FIFO sizes and thresholds.
352 pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
354 /* Disable PREQ# till DDACK# */
355 if (via_config->flags & VIA_BAD_PREQ) {
356 /* Would crash on 586b rev 41 */
360 /* Fix FIFO split between channels */
361 if (via_config->flags & VIA_SET_FIFO) {
364 case 2: t |= 0x00; break; /* 16 on primary */
365 case 1: t |= 0x60; break; /* 16 on secondary */
366 case 3: t |= 0x20; break; /* 8 pri 8 sec */
370 pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
373 * Determine system bus clock.
376 via_clock = system_bus_clock() * 1000;
379 case 33000: via_clock = 33333; break;
380 case 37000: via_clock = 37500; break;
381 case 41000: via_clock = 41666; break;
384 if (via_clock < 20000 || via_clock > 50000) {
385 printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
386 "impossible (%d), using 33 MHz instead.\n", via_clock);
387 printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
388 "to assume 80-wire cable.\n");
393 * Print the boot message.
396 printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
397 "controller on pci%s\n",
398 via_config->name, isa->revision,
399 via_config->udma_mask ? "U" : "MW",
400 via_dma[via_config->udma_mask ?
401 (fls(via_config->udma_mask) - 1) : 0],
409 * Cable special cases
412 static const struct dmi_system_id cable_dmi_table[] = {
414 .ident = "Acer Ferrari 3400",
416 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
417 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
423 static int via_cable_override(struct pci_dev *pdev)
426 if (dmi_check_system(cable_dmi_table))
429 /* Arima W730-K8/Targa Visionary 811/... */
430 if (pdev->subsystem_vendor == 0x161F &&
431 pdev->subsystem_device == 0x2032)
437 static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
439 struct pci_dev *pdev = hwif->pci_dev;
440 struct via82cxxx_dev *vdev = pci_get_drvdata(pdev);
442 if (via_cable_override(pdev))
443 return ATA_CBL_PATA40_SHORT;
445 if ((vdev->via_80w >> hwif->channel) & 1)
446 return ATA_CBL_PATA80;
448 return ATA_CBL_PATA40;
451 static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
453 struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
458 hwif->set_pio_mode = &via_set_pio_mode;
459 hwif->speedproc = &via_set_drive;
462 #ifdef CONFIG_PPC_CHRP
463 if(machine_is(chrp) && _chrp_type == _CHRP_Pegasos) {
464 hwif->irq = hwif->channel ? 15 : 14;
468 for (i = 0; i < 2; i++) {
469 hwif->drives[i].io_32bit = 1;
470 hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
471 hwif->drives[i].autotune = 1;
472 hwif->drives[i].dn = hwif->channel * 2 + i;
480 hwif->ultra_mask = vdev->via_config->udma_mask;
481 hwif->mwdma_mask = 0x07;
482 hwif->swdma_mask = 0x07;
484 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
485 hwif->cbl = via82cxxx_cable_detect(hwif);
487 hwif->ide_dma_check = &via82cxxx_ide_dma_check;
490 hwif->drives[0].autodma = hwif->autodma;
491 hwif->drives[1].autodma = hwif->autodma;
494 static ide_pci_device_t via82cxxx_chipsets[] __devinitdata = {
497 .init_chipset = init_chipset_via82cxxx,
498 .init_hwif = init_hwif_via82cxxx,
499 .autodma = NOAUTODMA,
500 .enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}},
501 .bootable = ON_BOARD,
502 .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST
503 | IDE_HFLAG_PIO_NO_DOWNGRADE,
504 .pio_mask = ATA_PIO5,
507 .init_chipset = init_chipset_via82cxxx,
508 .init_hwif = init_hwif_via82cxxx,
510 .enablebits = {{0x00,0x00,0x00}, {0x00,0x00,0x00}},
511 .bootable = ON_BOARD,
512 .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST
513 | IDE_HFLAG_PIO_NO_DOWNGRADE,
514 .pio_mask = ATA_PIO5,
518 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
520 struct pci_dev *isa = NULL;
521 struct via_isa_bridge *via_config;
523 * Find the ISA bridge and check we know what it is.
525 via_config = via_config_find(&isa);
527 if (!via_config->id) {
528 printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
531 return ide_setup_pci_device(dev, &via82cxxx_chipsets[id->driver_data]);
534 static struct pci_device_id via_pci_tbl[] = {
535 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
536 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
537 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_6410, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
538 { PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_SATA_EIDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
541 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
543 static struct pci_driver driver = {
545 .id_table = via_pci_tbl,
546 .probe = via_init_one,
549 static int __init via_ide_init(void)
551 return ide_pci_register_driver(&driver);
554 module_init(via_ide_init);
556 MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
557 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
558 MODULE_LICENSE("GPL");