diff options
Diffstat (limited to 'drivers/ide/via82cxxx.c')
| -rw-r--r-- | drivers/ide/via82cxxx.c | 514 |
1 files changed, 514 insertions, 0 deletions
diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c new file mode 100644 index 00000000000..2a812d3207e --- /dev/null +++ b/drivers/ide/via82cxxx.c @@ -0,0 +1,514 @@ +/* + * 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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/ide.h> +#include <linux/dmi.h> + +#ifdef CONFIG_PPC_CHRP +#include <asm/processor.h> +#endif + +#define DRV_NAME "via82cxxx" + +#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 ide_host *host = pci_get_drvdata(dev); + struct via82cxxx_dev *vdev = host->host_priv; + 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 = ide_get_pair_dev(drive); + struct pci_dev *dev = to_pci_dev(hwif->dev); + struct ide_host *host = pci_get_drvdata(dev); + struct via82cxxx_dev *vdev = host->host_priv; + 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) { + 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 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 + * + * The initialization callback. Here we determine the IDE chip type + * and initialize its drive independent registers. + */ + +static unsigned int init_chipset_via82cxxx(struct pci_dev *dev) +{ + struct ide_host *host = pci_get_drvdata(dev); + struct via82cxxx_dev *vdev = host->host_priv; + struct via_isa_bridge *via_config = vdev->via_config; + u8 t, v; + u32 u; + + /* + * 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); + + 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 via82cxxx_cable_detect(ide_hwif_t *hwif) +{ + struct pci_dev *pdev = to_pci_dev(hwif->dev); + struct ide_host *host = pci_get_drvdata(pdev); + struct via82cxxx_dev *vdev = host->host_priv; + + 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 = DRV_NAME, + .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; + struct via82cxxx_dev *vdev; + int rc; + 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); + if (!via_config->id) { + printk(KERN_WARNING DRV_NAME " %s: unknown chipset, skipping\n", + pci_name(dev)); + return -ENODEV; + } + + /* + * Print the boot message. + */ + printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n", + pci_name(dev), 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_dev_put(isa); + + /* + * 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 DRV_NAME ": User given PCI clock speed " + "impossible (%d), using 33 MHz instead.\n", via_clock); + printk(KERN_WARNING DRV_NAME ": Use ide0=ata66 if you want " + "to assume 80-wire cable.\n"); + via_clock = 33333; + } + + 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; + + vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); + if (!vdev) { + printk(KERN_ERR DRV_NAME " %s: out of memory :(\n", + pci_name(dev)); + return -ENOMEM; + } + + vdev->via_config = via_config; + + rc = ide_pci_init_one(dev, &d, vdev); + if (rc) + kfree(vdev); + + return rc; +} + +static void __devexit via_remove(struct pci_dev *dev) +{ + struct ide_host *host = pci_get_drvdata(dev); + struct via82cxxx_dev *vdev = host->host_priv; + + ide_pci_remove(dev); + kfree(vdev); +} + +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 via_pci_driver = { + .name = "VIA_IDE", + .id_table = via_pci_tbl, + .probe = via_init_one, + .remove = __devexit_p(via_remove), + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init via_ide_init(void) +{ + return ide_pci_register_driver(&via_pci_driver); +} + +static void __exit via_ide_exit(void) +{ + pci_unregister_driver(&via_pci_driver); +} + +module_init(via_ide_init); +module_exit(via_ide_exit); + +MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick"); +MODULE_DESCRIPTION("PCI driver module for VIA IDE"); +MODULE_LICENSE("GPL"); |