1 files changed, 514 insertions, 0 deletions

diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c
new file mode 100644
index 000000000000..2a812d3207e9
--- /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");