forked from Minki/linux
[PATCH] via82cxxx IDE: support multiple controllers
Support multiple controllers in the via82cxxx IDE driver. Cable detection and ISA bridge finding have been moved into their own functions. Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Daniel Drake
Bartlomiej Zolnierkiewicz
parent
861e76a8ab
commit
7462cbff7d
@ -100,11 +100,15 @@ static struct via_isa_bridge {
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{ NULL }
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};
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static struct via_isa_bridge *via_config;
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static unsigned int via_80w;
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static unsigned int via_clock;
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static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" };
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struct via82cxxx_dev
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{
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struct via_isa_bridge *via_config;
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unsigned int via_80w;
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};
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/**
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* via_set_speed - write timing registers
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* @dev: PCI device
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@ -114,11 +118,13 @@ static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" }
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* via_set_speed writes timing values to the chipset registers
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*/
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static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
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static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
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{
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struct pci_dev *dev = hwif->pci_dev;
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struct via82cxxx_dev *vdev = ide_get_hwifdata(hwif);
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u8 t;
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if (~via_config->flags & VIA_BAD_AST) {
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if (~vdev->via_config->flags & VIA_BAD_AST) {
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pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
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t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
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pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
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@ -130,7 +136,7 @@ static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
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pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
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((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));
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switch (via_config->flags & VIA_UDMA) {
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switch (vdev->via_config->flags & VIA_UDMA) {
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case VIA_UDMA_33: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
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case VIA_UDMA_66: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break;
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case VIA_UDMA_100: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
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@ -154,6 +160,7 @@ static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
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static int via_set_drive(ide_drive_t *drive, u8 speed)
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{
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ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
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struct via82cxxx_dev *vdev = ide_get_hwifdata(drive->hwif);
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struct ide_timing t, p;
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unsigned int T, UT;
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@ -162,7 +169,7 @@ static int via_set_drive(ide_drive_t *drive, u8 speed)
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T = 1000000000 / via_clock;
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switch (via_config->flags & VIA_UDMA) {
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switch (vdev->via_config->flags & VIA_UDMA) {
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case VIA_UDMA_33: UT = T; break;
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case VIA_UDMA_66: UT = T/2; break;
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case VIA_UDMA_100: UT = T/3; break;
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@ -177,7 +184,7 @@ static int via_set_drive(ide_drive_t *drive, u8 speed)
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ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
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}
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via_set_speed(HWIF(drive)->pci_dev, drive->dn, &t);
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via_set_speed(HWIF(drive), drive->dn, &t);
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if (!drive->init_speed)
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drive->init_speed = speed;
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@ -215,20 +222,41 @@ static void via82cxxx_tune_drive(ide_drive_t *drive, u8 pio)
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static int via82cxxx_ide_dma_check (ide_drive_t *drive)
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{
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u16 w80 = HWIF(drive)->udma_four;
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ide_hwif_t *hwif = HWIF(drive);
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struct via82cxxx_dev *vdev = ide_get_hwifdata(hwif);
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u16 w80 = hwif->udma_four;
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u16 speed = ide_find_best_mode(drive,
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XFER_PIO | XFER_EPIO | XFER_SWDMA | XFER_MWDMA |
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(via_config->flags & VIA_UDMA ? XFER_UDMA : 0) |
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(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_66 ? XFER_UDMA_66 : 0) |
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(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_100 ? XFER_UDMA_100 : 0) |
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(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));
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(vdev->via_config->flags & VIA_UDMA ? XFER_UDMA : 0) |
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(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_66 ? XFER_UDMA_66 : 0) |
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(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_100 ? XFER_UDMA_100 : 0) |
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(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));
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via_set_drive(drive, speed);
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if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
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return HWIF(drive)->ide_dma_on(drive);
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return HWIF(drive)->ide_dma_off_quietly(drive);
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return hwif->ide_dma_on(drive);
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return hwif->ide_dma_off_quietly(drive);
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}
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static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
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{
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struct via_isa_bridge *via_config;
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u8 t;
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for (via_config = via_isa_bridges; via_config->id; via_config++)
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if ((*isa = pci_find_device(PCI_VENDOR_ID_VIA +
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!!(via_config->flags & VIA_BAD_ID),
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via_config->id, NULL))) {
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pci_read_config_byte(*isa, PCI_REVISION_ID, &t);
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if (t >= via_config->rev_min &&
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t <= via_config->rev_max)
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break;
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}
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return via_config;
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}
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/**
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@ -243,82 +271,28 @@ static int via82cxxx_ide_dma_check (ide_drive_t *drive)
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static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
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{
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struct pci_dev *isa = NULL;
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struct via_isa_bridge *via_config;
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u8 t, v;
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unsigned int u;
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int i;
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/*
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* Find the ISA bridge to see how good the IDE is.
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*/
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for (via_config = via_isa_bridges; via_config->id; via_config++)
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if ((isa = pci_find_device(PCI_VENDOR_ID_VIA +
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!!(via_config->flags & VIA_BAD_ID),
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via_config->id, NULL))) {
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pci_read_config_byte(isa, PCI_REVISION_ID, &t);
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if (t >= via_config->rev_min &&
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t <= via_config->rev_max)
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break;
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}
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via_config = via_config_find(&isa);
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if (!via_config->id) {
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printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
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return -ENODEV;
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}
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/*
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* Check 80-wire cable presence and setup Clk66.
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* Setup or disable Clk66 if appropriate
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*/
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switch (via_config->flags & VIA_UDMA) {
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case VIA_UDMA_66:
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/* Enable Clk66 */
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
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for (i = 24; i >= 0; i -= 8)
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if (((u >> (i & 16)) & 8) &&
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((u >> i) & 0x20) &&
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(((u >> i) & 7) < 2)) {
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/*
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* 2x PCI clock and
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* UDMA w/ < 3T/cycle
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*/
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via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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case VIA_UDMA_100:
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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for (i = 24; i >= 0; i -= 8)
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if (((u >> i) & 0x10) ||
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(((u >> i) & 0x20) &&
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(((u >> i) & 7) < 4))) {
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/* BIOS 80-wire bit or
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* UDMA w/ < 60ns/cycle
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*/
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via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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case VIA_UDMA_133:
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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for (i = 24; i >= 0; i -= 8)
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if (((u >> i) & 0x10) ||
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(((u >> i) & 0x20) &&
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(((u >> i) & 7) < 6))) {
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/* BIOS 80-wire bit or
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* UDMA w/ < 60ns/cycle
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*/
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via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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}
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/* Disable Clk66 */
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if (via_config->flags & VIA_BAD_CLK66) {
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if ((via_config->flags & VIA_UDMA) == VIA_UDMA_66) {
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/* Enable Clk66 */
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
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} else if (via_config->flags & VIA_BAD_CLK66) {
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/* Would cause trouble on 596a and 686 */
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
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@ -388,10 +362,75 @@ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const
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return 0;
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}
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/*
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* Check and handle 80-wire cable presence
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*/
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static void __devinit via_cable_detect(struct pci_dev *dev, struct via82cxxx_dev *vdev)
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{
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unsigned int u;
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int i;
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pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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switch (vdev->via_config->flags & VIA_UDMA) {
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case VIA_UDMA_66:
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for (i = 24; i >= 0; i -= 8)
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if (((u >> (i & 16)) & 8) &&
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((u >> i) & 0x20) &&
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(((u >> i) & 7) < 2)) {
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/*
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* 2x PCI clock and
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* UDMA w/ < 3T/cycle
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*/
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vdev->via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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case VIA_UDMA_100:
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for (i = 24; i >= 0; i -= 8)
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if (((u >> i) & 0x10) ||
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(((u >> i) & 0x20) &&
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(((u >> i) & 7) < 4))) {
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/* BIOS 80-wire bit or
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* UDMA w/ < 60ns/cycle
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*/
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vdev->via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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case VIA_UDMA_133:
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for (i = 24; i >= 0; i -= 8)
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if (((u >> i) & 0x10) ||
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(((u >> i) & 0x20) &&
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(((u >> i) & 7) < 6))) {
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/* BIOS 80-wire bit or
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* UDMA w/ < 60ns/cycle
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*/
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vdev->via_80w |= (1 << (1 - (i >> 4)));
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}
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break;
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}
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}
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static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
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{
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struct via82cxxx_dev *vdev = kmalloc(sizeof(struct via82cxxx_dev),
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GFP_KERNEL);
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struct pci_dev *isa = NULL;
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int i;
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if (vdev == NULL) {
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printk(KERN_ERR "VP_IDE: out of memory :(\n");
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return;
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}
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memset(vdev, 0, sizeof(struct via82cxxx_dev));
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ide_set_hwifdata(hwif, vdev);
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vdev->via_config = via_config_find(&isa);
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via_cable_detect(hwif->pci_dev, vdev);
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hwif->autodma = 0;
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hwif->tuneproc = &via82cxxx_tune_drive;
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@ -406,7 +445,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
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for (i = 0; i < 2; i++) {
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hwif->drives[i].io_32bit = 1;
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hwif->drives[i].unmask = (via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
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hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
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hwif->drives[i].autotune = 1;
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hwif->drives[i].dn = hwif->channel * 2 + i;
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}
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@ -420,7 +459,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
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hwif->swdma_mask = 0x07;
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if (!hwif->udma_four)
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hwif->udma_four = (via_80w >> hwif->channel) & 1;
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hwif->udma_four = (vdev->via_80w >> hwif->channel) & 1;
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hwif->ide_dma_check = &via82cxxx_ide_dma_check;
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if (!noautodma)
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hwif->autodma = 1;
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