2 * VIA IDE driver for Linux. Supported southbridges:
4 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
5 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
6 * vt8235, vt8237, vt8237a
8 * Copyright (c) 2000-2002 Vojtech Pavlik
9 * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
11 * Based on the work of:
17 * Obsolete device documentation publically available from via.com.tw
18 * Current device documentation available under NDA only
22 * This program is free software; you can redistribute it and/or modify it
23 * under the terms of the GNU General Public License version 2 as published by
24 * the Free Software Foundation.
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/ide.h>
32 #include <linux/dmi.h>
34 #ifdef CONFIG_PPC_CHRP
35 #include <asm/processor.h>
38 #define VIA_IDE_ENABLE 0x40
39 #define VIA_IDE_CONFIG 0x41
40 #define VIA_FIFO_CONFIG 0x43
41 #define VIA_MISC_1 0x44
42 #define VIA_MISC_2 0x45
43 #define VIA_MISC_3 0x46
44 #define VIA_DRIVE_TIMING 0x48
45 #define VIA_8BIT_TIMING 0x4e
46 #define VIA_ADDRESS_SETUP 0x4c
47 #define VIA_UDMA_TIMING 0x50
49 #define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */
50 #define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */
51 #define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */
52 #define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */
53 #define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */
54 #define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */
57 * VIA SouthBridge chips.
60 static struct via_isa_bridge {
67 } via_isa_bridges[] = {
68 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
69 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
70 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
71 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
72 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
73 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
74 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
75 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
76 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
77 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
78 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
79 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
80 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
81 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
82 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
83 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
84 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
85 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
86 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
87 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
88 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
89 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
90 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
91 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
95 static unsigned int via_clock;
96 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
100 struct via_isa_bridge *via_config;
101 unsigned int via_80w;
105 * via_set_speed - write timing registers
108 * @timing: IDE timing data to use
110 * via_set_speed writes timing values to the chipset registers
113 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
115 struct pci_dev *dev = to_pci_dev(hwif->dev);
116 struct ide_host *host = pci_get_drvdata(dev);
117 struct via82cxxx_dev *vdev = host->host_priv;
120 if (~vdev->via_config->flags & VIA_BAD_AST) {
121 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
122 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
123 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
126 pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
127 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
129 pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
130 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
132 switch (vdev->via_config->udma_mask) {
133 case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
134 case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
135 case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
136 case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
140 pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
144 * via_set_drive - configure transfer mode
145 * @drive: Drive to set up
146 * @speed: desired speed
148 * via_set_drive() computes timing values configures the chipset to
149 * a desired transfer mode. It also can be called by upper layers.
152 static void via_set_drive(ide_drive_t *drive, const u8 speed)
154 ide_hwif_t *hwif = drive->hwif;
155 ide_drive_t *peer = hwif->drives + (~drive->dn & 1);
156 struct pci_dev *dev = to_pci_dev(hwif->dev);
157 struct ide_host *host = pci_get_drvdata(dev);
158 struct via82cxxx_dev *vdev = host->host_priv;
159 struct ide_timing t, p;
162 T = 1000000000 / via_clock;
164 switch (vdev->via_config->udma_mask) {
165 case ATA_UDMA2: UT = T; break;
166 case ATA_UDMA4: UT = T/2; break;
167 case ATA_UDMA5: UT = T/3; break;
168 case ATA_UDMA6: UT = T/4; break;
172 ide_timing_compute(drive, speed, &t, T, UT);
175 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
176 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
179 via_set_speed(HWIF(drive), drive->dn, &t);
183 * via_set_pio_mode - set host controller for PIO mode
185 * @pio: PIO mode number
187 * A callback from the upper layers for PIO-only tuning.
190 static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
192 via_set_drive(drive, XFER_PIO_0 + pio);
195 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
197 struct via_isa_bridge *via_config;
199 for (via_config = via_isa_bridges; via_config->id; via_config++)
200 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
201 !!(via_config->flags & VIA_BAD_ID),
202 via_config->id, NULL))) {
204 if ((*isa)->revision >= via_config->rev_min &&
205 (*isa)->revision <= via_config->rev_max)
214 * Check and handle 80-wire cable presence
216 static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
220 switch (vdev->via_config->udma_mask) {
222 for (i = 24; i >= 0; i -= 8)
223 if (((u >> (i & 16)) & 8) &&
225 (((u >> i) & 7) < 2)) {
230 vdev->via_80w |= (1 << (1 - (i >> 4)));
235 for (i = 24; i >= 0; i -= 8)
236 if (((u >> i) & 0x10) ||
237 (((u >> i) & 0x20) &&
238 (((u >> i) & 7) < 4))) {
239 /* BIOS 80-wire bit or
240 * UDMA w/ < 60ns/cycle
242 vdev->via_80w |= (1 << (1 - (i >> 4)));
247 for (i = 24; i >= 0; i -= 8)
248 if (((u >> i) & 0x10) ||
249 (((u >> i) & 0x20) &&
250 (((u >> i) & 7) < 6))) {
251 /* BIOS 80-wire bit or
252 * UDMA w/ < 60ns/cycle
254 vdev->via_80w |= (1 << (1 - (i >> 4)));
261 * init_chipset_via82cxxx - initialization handler
263 * @name: Name of interface
265 * The initialization callback. Here we determine the IDE chip type
266 * and initialize its drive independent registers.
269 static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
271 struct ide_host *host = pci_get_drvdata(dev);
272 struct via82cxxx_dev *vdev = host->host_priv;
273 struct via_isa_bridge *via_config = vdev->via_config;
278 * Detect cable and configure Clk66
280 pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
282 via_cable_detect(vdev, u);
284 if (via_config->udma_mask == ATA_UDMA4) {
286 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
287 } else if (via_config->flags & VIA_BAD_CLK66) {
288 /* Would cause trouble on 596a and 686 */
289 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
293 * Check whether interfaces are enabled.
296 pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
299 * Set up FIFO sizes and thresholds.
302 pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
304 /* Disable PREQ# till DDACK# */
305 if (via_config->flags & VIA_BAD_PREQ) {
306 /* Would crash on 586b rev 41 */
310 /* Fix FIFO split between channels */
311 if (via_config->flags & VIA_SET_FIFO) {
314 case 2: t |= 0x00; break; /* 16 on primary */
315 case 1: t |= 0x60; break; /* 16 on secondary */
316 case 3: t |= 0x20; break; /* 8 pri 8 sec */
320 pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
326 * Cable special cases
329 static const struct dmi_system_id cable_dmi_table[] = {
331 .ident = "Acer Ferrari 3400",
333 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
334 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
340 static int via_cable_override(struct pci_dev *pdev)
343 if (dmi_check_system(cable_dmi_table))
346 /* Arima W730-K8/Targa Visionary 811/... */
347 if (pdev->subsystem_vendor == 0x161F &&
348 pdev->subsystem_device == 0x2032)
354 static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
356 struct pci_dev *pdev = to_pci_dev(hwif->dev);
357 struct ide_host *host = pci_get_drvdata(pdev);
358 struct via82cxxx_dev *vdev = host->host_priv;
360 if (via_cable_override(pdev))
361 return ATA_CBL_PATA40_SHORT;
363 if ((vdev->via_80w >> hwif->channel) & 1)
364 return ATA_CBL_PATA80;
366 return ATA_CBL_PATA40;
369 static const struct ide_port_ops via_port_ops = {
370 .set_pio_mode = via_set_pio_mode,
371 .set_dma_mode = via_set_drive,
372 .cable_detect = via82cxxx_cable_detect,
375 static const struct ide_port_info via82cxxx_chipset __devinitdata = {
377 .init_chipset = init_chipset_via82cxxx,
378 .enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
379 .port_ops = &via_port_ops,
380 .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST |
381 IDE_HFLAG_POST_SET_MODE |
383 .pio_mask = ATA_PIO5,
384 .swdma_mask = ATA_SWDMA2,
385 .mwdma_mask = ATA_MWDMA2,
388 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
390 struct pci_dev *isa = NULL;
391 struct via_isa_bridge *via_config;
392 struct via82cxxx_dev *vdev;
394 u8 idx = id->driver_data;
395 struct ide_port_info d;
397 d = via82cxxx_chipset;
400 * Find the ISA bridge and check we know what it is.
402 via_config = via_config_find(&isa);
403 if (!via_config->id) {
404 printk(KERN_WARNING "VP_IDE %s: unknown chipset, skipping\n",
410 * Print the boot message.
412 printk(KERN_INFO "VP_IDE %s: VIA %s (rev %02x) IDE %sDMA%s\n",
413 pci_name(dev), via_config->name, isa->revision,
414 via_config->udma_mask ? "U" : "MW",
415 via_dma[via_config->udma_mask ?
416 (fls(via_config->udma_mask) - 1) : 0]);
421 * Determine system bus clock.
423 via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
426 case 33000: via_clock = 33333; break;
427 case 37000: via_clock = 37500; break;
428 case 41000: via_clock = 41666; break;
431 if (via_clock < 20000 || via_clock > 50000) {
432 printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
433 "impossible (%d), using 33 MHz instead.\n", via_clock);
434 printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
435 "to assume 80-wire cable.\n");
440 d.host_flags |= IDE_HFLAG_NO_AUTODMA;
442 d.enablebits[1].reg = d.enablebits[0].reg = 0;
444 if ((via_config->flags & VIA_NO_UNMASK) == 0)
445 d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
447 #ifdef CONFIG_PPC_CHRP
448 if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos)
449 d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS;
452 d.udma_mask = via_config->udma_mask;
454 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
456 printk(KERN_ERR "VP_IDE %s: out of memory :(\n", pci_name(dev));
460 vdev->via_config = via_config;
462 rc = ide_pci_init_one(dev, &d, vdev);
469 static void __devexit via_remove(struct pci_dev *dev)
471 struct ide_host *host = pci_get_drvdata(dev);
472 struct via82cxxx_dev *vdev = host->host_priv;
478 static const struct pci_device_id via_pci_tbl[] = {
479 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 },
480 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 },
481 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
482 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 },
483 { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
486 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
488 static struct pci_driver driver = {
490 .id_table = via_pci_tbl,
491 .probe = via_init_one,
492 .remove = via_remove,
495 static int __init via_ide_init(void)
497 return ide_pci_register_driver(&driver);
500 static void __exit via_ide_exit(void)
502 pci_unregister_driver(&driver);
505 module_init(via_ide_init);
506 module_exit(via_ide_exit);
508 MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
509 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
510 MODULE_LICENSE("GPL");