/* * VIA IDE driver for Linux. Supported southbridges: * * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a, * vt8235, vt8237, vt8237a * * Copyright (c) 2000-2002 Vojtech Pavlik * Copyright (c) 2007 Bartlomiej Zolnierkiewicz * * Based on the work of: * Michel Aubry * Jeff Garzik * Andre Hedrick * * Documentation: * Obsolete device documentation publically available from via.com.tw * Current device documentation available under NDA only */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */ #include #include #include #include #include #include #ifdef CONFIG_PPC_CHRP #include #endif #define VIA_IDE_ENABLE 0x40 #define VIA_IDE_CONFIG 0x41 #define VIA_FIFO_CONFIG 0x43 #define VIA_MISC_1 0x44 #define VIA_MISC_2 0x45 #define VIA_MISC_3 0x46 #define VIA_DRIVE_TIMING 0x48 #define VIA_8BIT_TIMING 0x4e #define VIA_ADDRESS_SETUP 0x4c #define VIA_UDMA_TIMING 0x50 #define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */ #define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */ #define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */ #define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */ #define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */ #define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */ /* * VIA SouthBridge chips. */ static struct via_isa_bridge { char *name; u16 id; u8 rev_min; u8 rev_max; u8 udma_mask; u8 flags; } via_isa_bridges[] = { { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, }, { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, }, { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, }, { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, }, { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, }, { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, }, { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO }, { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO }, { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO }, { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK }, { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID }, { NULL } }; static unsigned int via_clock; static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" }; struct via82cxxx_dev { struct via_isa_bridge *via_config; unsigned int via_80w; }; /** * via_set_speed - write timing registers * @dev: PCI device * @dn: device * @timing: IDE timing data to use * * via_set_speed writes timing values to the chipset registers */ static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing) { struct pci_dev *dev = to_pci_dev(hwif->dev); struct via82cxxx_dev *vdev = pci_get_drvdata(dev); u8 t; if (~vdev->via_config->flags & VIA_BAD_AST) { pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t); t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1)); pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t); } pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)), ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1)); pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn), ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1)); switch (vdev->via_config->udma_mask) { case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break; case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break; case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break; case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break; default: return; } pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t); } /** * via_set_drive - configure transfer mode * @drive: Drive to set up * @speed: desired speed * * via_set_drive() computes timing values configures the chipset to * a desired transfer mode. It also can be called by upper layers. */ static void via_set_drive(ide_drive_t *drive, const u8 speed) { ide_hwif_t *hwif = drive->hwif; ide_drive_t *peer = hwif->drives + (~drive->dn & 1); struct pci_dev *dev = to_pci_dev(hwif->dev); struct via82cxxx_dev *vdev = pci_get_drvdata(dev); struct ide_timing t, p; unsigned int T, UT; T = 1000000000 / via_clock; switch (vdev->via_config->udma_mask) { case ATA_UDMA2: UT = T; break; case ATA_UDMA4: UT = T/2; break; case ATA_UDMA5: UT = T/3; break; case ATA_UDMA6: UT = T/4; break; default: UT = T; } ide_timing_compute(drive, speed, &t, T, UT); if (peer->present) { ide_timing_compute(peer, peer->current_speed, &p, T, UT); ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT); } via_set_speed(HWIF(drive), drive->dn, &t); } /** * via_set_pio_mode - set host controller for PIO mode * @drive: drive * @pio: PIO mode number * * A callback from the upper layers for PIO-only tuning. */ static void via_set_pio_mode(ide_drive_t *drive, const u8 pio) { via_set_drive(drive, XFER_PIO_0 + pio); } static struct via_isa_bridge *via_config_find(struct pci_dev **isa) { struct via_isa_bridge *via_config; for (via_config = via_isa_bridges; via_config->id; via_config++) if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA + !!(via_config->flags & VIA_BAD_ID), via_config->id, NULL))) { if ((*isa)->revision >= via_config->rev_min && (*isa)->revision <= via_config->rev_max) break; pci_dev_put(*isa); } return via_config; } /* * Check and handle 80-wire cable presence */ static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u) { int i; switch (vdev->via_config->udma_mask) { case ATA_UDMA4: for (i = 24; i >= 0; i -= 8) if (((u >> (i & 16)) & 8) && ((u >> i) & 0x20) && (((u >> i) & 7) < 2)) { /* * 2x PCI clock and * UDMA w/ < 3T/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; case ATA_UDMA5: for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 4))) { /* BIOS 80-wire bit or * UDMA w/ < 60ns/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; case ATA_UDMA6: for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 6))) { /* BIOS 80-wire bit or * UDMA w/ < 60ns/cycle */ vdev->via_80w |= (1 << (1 - (i >> 4))); } break; } } /** * init_chipset_via82cxxx - initialization handler * @dev: PCI device * @name: Name of interface * * The initialization callback. Here we determine the IDE chip type * and initialize its drive independent registers. */ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name) { struct pci_dev *isa = NULL; struct via82cxxx_dev *vdev; struct via_isa_bridge *via_config; u8 t, v; u32 u; vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); if (!vdev) { printk(KERN_ERR "VP_IDE: out of memory :(\n"); return -ENOMEM; } pci_set_drvdata(dev, vdev); /* * Find the ISA bridge to see how good the IDE is. */ vdev->via_config = via_config = via_config_find(&isa); /* We checked this earlier so if it fails here deeep badness is involved */ BUG_ON(!via_config->id); /* * Detect cable and configure Clk66 */ pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); via_cable_detect(vdev, u); if (via_config->udma_mask == ATA_UDMA4) { /* Enable Clk66 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008); } else if (via_config->flags & VIA_BAD_CLK66) { /* Would cause trouble on 596a and 686 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008); } /* * Check whether interfaces are enabled. */ pci_read_config_byte(dev, VIA_IDE_ENABLE, &v); /* * Set up FIFO sizes and thresholds. */ pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t); /* Disable PREQ# till DDACK# */ if (via_config->flags & VIA_BAD_PREQ) { /* Would crash on 586b rev 41 */ t &= 0x7f; } /* Fix FIFO split between channels */ if (via_config->flags & VIA_SET_FIFO) { t &= (t & 0x9f); switch (v & 3) { case 2: t |= 0x00; break; /* 16 on primary */ case 1: t |= 0x60; break; /* 16 on secondary */ case 3: t |= 0x20; break; /* 8 pri 8 sec */ } } pci_write_config_byte(dev, VIA_FIFO_CONFIG, t); /* * Determine system bus clock. */ via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000; switch (via_clock) { case 33000: via_clock = 33333; break; case 37000: via_clock = 37500; break; case 41000: via_clock = 41666; break; } if (via_clock < 20000 || via_clock > 50000) { printk(KERN_WARNING "VP_IDE: User given PCI clock speed " "impossible (%d), using 33 MHz instead.\n", via_clock); printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want " "to assume 80-wire cable.\n"); via_clock = 33333; } /* * Print the boot message. */ printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s " "controller on pci%s\n", via_config->name, isa->revision, via_config->udma_mask ? "U" : "MW", via_dma[via_config->udma_mask ? (fls(via_config->udma_mask) - 1) : 0], pci_name(dev)); pci_dev_put(isa); return 0; } /* * Cable special cases */ static const struct dmi_system_id cable_dmi_table[] = { { .ident = "Acer Ferrari 3400", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), }, }, { } }; static int via_cable_override(struct pci_dev *pdev) { /* Systems by DMI */ if (dmi_check_system(cable_dmi_table)) return 1; /* Arima W730-K8/Targa Visionary 811/... */ if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032) return 1; return 0; } static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif) { struct pci_dev *pdev = to_pci_dev(hwif->dev); struct via82cxxx_dev *vdev = pci_get_drvdata(pdev); if (via_cable_override(pdev)) return ATA_CBL_PATA40_SHORT; if ((vdev->via_80w >> hwif->channel) & 1) return ATA_CBL_PATA80; else return ATA_CBL_PATA40; } static const struct ide_port_ops via_port_ops = { .set_pio_mode = via_set_pio_mode, .set_dma_mode = via_set_drive, .cable_detect = via82cxxx_cable_detect, }; static const struct ide_port_info via82cxxx_chipset __devinitdata = { .name = "VP_IDE", .init_chipset = init_chipset_via82cxxx, .enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } }, .port_ops = &via_port_ops, .host_flags = IDE_HFLAG_PIO_NO_BLACKLIST | IDE_HFLAG_POST_SET_MODE | IDE_HFLAG_IO_32BIT, .pio_mask = ATA_PIO5, .swdma_mask = ATA_SWDMA2, .mwdma_mask = ATA_MWDMA2, }; static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id) { struct pci_dev *isa = NULL; struct via_isa_bridge *via_config; u8 idx = id->driver_data; struct ide_port_info d; d = via82cxxx_chipset; /* * Find the ISA bridge and check we know what it is. */ via_config = via_config_find(&isa); pci_dev_put(isa); if (!via_config->id) { printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n"); return -ENODEV; } if (idx == 0) d.host_flags |= IDE_HFLAG_NO_AUTODMA; else d.enablebits[1].reg = d.enablebits[0].reg = 0; if ((via_config->flags & VIA_NO_UNMASK) == 0) d.host_flags |= IDE_HFLAG_UNMASK_IRQS; #ifdef CONFIG_PPC_CHRP if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos) d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS; #endif d.udma_mask = via_config->udma_mask; return ide_pci_init_one(dev, &d, NULL); } static const struct pci_device_id via_pci_tbl[] = { { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 }, { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 }, { 0, }, }; MODULE_DEVICE_TABLE(pci, via_pci_tbl); static struct pci_driver driver = { .name = "VIA_IDE", .id_table = via_pci_tbl, .probe = via_init_one, }; static int __init via_ide_init(void) { return ide_pci_register_driver(&driver); } module_init(via_ide_init); MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick"); MODULE_DESCRIPTION("PCI driver module for VIA IDE"); MODULE_LICENSE("GPL");