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yaml
---
r: 14482
b: refs/heads/master
c: 7462cbf
h: refs/heads/master
v: v3
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Daniel Drake authored and Bartlomiej Zolnierkiewicz committed Nov 18, 2005
1 parent 7b3deb0 commit 074307e
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Showing 2 changed files with 118 additions and 79 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 861e76a8ab7ba64a74c567fa8c4d1d38c4dfdd24
refs/heads/master: 7462cbff7d4c2dc0d182613fb4e801efb29b90ac
195 changes: 117 additions & 78 deletions trunk/drivers/ide/pci/via82cxxx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -100,11 +100,15 @@ static struct via_isa_bridge {
{ NULL }
};

static struct via_isa_bridge *via_config;
static unsigned int via_80w;
static unsigned int via_clock;
static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" };

struct via82cxxx_dev
{
struct via_isa_bridge *via_config;
unsigned int via_80w;
};

/**
* via_set_speed - write timing registers
* @dev: PCI device
Expand All @@ -114,11 +118,13 @@ static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" }
* via_set_speed writes timing values to the chipset registers
*/

static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
{
struct pci_dev *dev = hwif->pci_dev;
struct via82cxxx_dev *vdev = ide_get_hwifdata(hwif);
u8 t;

if (~via_config->flags & VIA_BAD_AST) {
if (~vdev->via_config->flags & VIA_BAD_AST) {
pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
Expand All @@ -130,7 +136,7 @@ static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));

switch (via_config->flags & VIA_UDMA) {
switch (vdev->via_config->flags & VIA_UDMA) {
case VIA_UDMA_33: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
case VIA_UDMA_66: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break;
case VIA_UDMA_100: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
Expand All @@ -154,6 +160,7 @@ static void via_set_speed(struct pci_dev *dev, u8 dn, struct ide_timing *timing)
static int via_set_drive(ide_drive_t *drive, u8 speed)
{
ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
struct via82cxxx_dev *vdev = ide_get_hwifdata(drive->hwif);
struct ide_timing t, p;
unsigned int T, UT;

Expand All @@ -162,7 +169,7 @@ static int via_set_drive(ide_drive_t *drive, u8 speed)

T = 1000000000 / via_clock;

switch (via_config->flags & VIA_UDMA) {
switch (vdev->via_config->flags & VIA_UDMA) {
case VIA_UDMA_33: UT = T; break;
case VIA_UDMA_66: UT = T/2; break;
case VIA_UDMA_100: UT = T/3; break;
Expand All @@ -177,7 +184,7 @@ static int via_set_drive(ide_drive_t *drive, u8 speed)
ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
}

via_set_speed(HWIF(drive)->pci_dev, drive->dn, &t);
via_set_speed(HWIF(drive), drive->dn, &t);

if (!drive->init_speed)
drive->init_speed = speed;
Expand Down Expand Up @@ -215,20 +222,41 @@ static void via82cxxx_tune_drive(ide_drive_t *drive, u8 pio)

static int via82cxxx_ide_dma_check (ide_drive_t *drive)
{
u16 w80 = HWIF(drive)->udma_four;
ide_hwif_t *hwif = HWIF(drive);
struct via82cxxx_dev *vdev = ide_get_hwifdata(hwif);
u16 w80 = hwif->udma_four;

u16 speed = ide_find_best_mode(drive,
XFER_PIO | XFER_EPIO | XFER_SWDMA | XFER_MWDMA |
(via_config->flags & VIA_UDMA ? XFER_UDMA : 0) |
(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_66 ? XFER_UDMA_66 : 0) |
(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_100 ? XFER_UDMA_100 : 0) |
(w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));
(vdev->via_config->flags & VIA_UDMA ? XFER_UDMA : 0) |
(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_66 ? XFER_UDMA_66 : 0) |
(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_100 ? XFER_UDMA_100 : 0) |
(w80 && (vdev->via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));

via_set_drive(drive, speed);

if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
return HWIF(drive)->ide_dma_on(drive);
return HWIF(drive)->ide_dma_off_quietly(drive);
return hwif->ide_dma_on(drive);
return hwif->ide_dma_off_quietly(drive);
}

static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
{
struct via_isa_bridge *via_config;
u8 t;

for (via_config = via_isa_bridges; via_config->id; via_config++)
if ((*isa = pci_find_device(PCI_VENDOR_ID_VIA +
!!(via_config->flags & VIA_BAD_ID),
via_config->id, NULL))) {

pci_read_config_byte(*isa, PCI_REVISION_ID, &t);
if (t >= via_config->rev_min &&
t <= via_config->rev_max)
break;
}

return via_config;
}

/**
Expand All @@ -243,82 +271,28 @@ static int via82cxxx_ide_dma_check (ide_drive_t *drive)
static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
{
struct pci_dev *isa = NULL;
struct via_isa_bridge *via_config;
u8 t, v;
unsigned int u;
int i;

/*
* Find the ISA bridge to see how good the IDE is.
*/

for (via_config = via_isa_bridges; via_config->id; via_config++)
if ((isa = pci_find_device(PCI_VENDOR_ID_VIA +
!!(via_config->flags & VIA_BAD_ID),
via_config->id, NULL))) {

pci_read_config_byte(isa, PCI_REVISION_ID, &t);
if (t >= via_config->rev_min &&
t <= via_config->rev_max)
break;
}

via_config = via_config_find(&isa);
if (!via_config->id) {
printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
return -ENODEV;
}

/*
* Check 80-wire cable presence and setup Clk66.
* Setup or disable Clk66 if appropriate
*/

switch (via_config->flags & VIA_UDMA) {

case VIA_UDMA_66:
/* Enable Clk66 */
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
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
*/
via_80w |= (1 << (1 - (i >> 4)));
}
break;

case VIA_UDMA_100:
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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
*/
via_80w |= (1 << (1 - (i >> 4)));
}
break;

case VIA_UDMA_133:
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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
*/
via_80w |= (1 << (1 - (i >> 4)));
}
break;

}

/* Disable Clk66 */
if (via_config->flags & VIA_BAD_CLK66) {
if ((via_config->flags & VIA_UDMA) == VIA_UDMA_66) {
/* Enable Clk66 */
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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_read_config_dword(dev, VIA_UDMA_TIMING, &u);
pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
Expand Down Expand Up @@ -388,10 +362,75 @@ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const
return 0;
}

/*
* Check and handle 80-wire cable presence
*/
static void __devinit via_cable_detect(struct pci_dev *dev, struct via82cxxx_dev *vdev)
{
unsigned int u;
int i;
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);

switch (vdev->via_config->flags & VIA_UDMA) {

case VIA_UDMA_66:
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 VIA_UDMA_100:
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 VIA_UDMA_133:
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;

}
}

static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
{
struct via82cxxx_dev *vdev = kmalloc(sizeof(struct via82cxxx_dev),
GFP_KERNEL);
struct pci_dev *isa = NULL;
int i;

if (vdev == NULL) {
printk(KERN_ERR "VP_IDE: out of memory :(\n");
return;
}

memset(vdev, 0, sizeof(struct via82cxxx_dev));
ide_set_hwifdata(hwif, vdev);

vdev->via_config = via_config_find(&isa);
via_cable_detect(hwif->pci_dev, vdev);

hwif->autodma = 0;

hwif->tuneproc = &via82cxxx_tune_drive;
Expand All @@ -406,7 +445,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)

for (i = 0; i < 2; i++) {
hwif->drives[i].io_32bit = 1;
hwif->drives[i].unmask = (via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
hwif->drives[i].autotune = 1;
hwif->drives[i].dn = hwif->channel * 2 + i;
}
Expand All @@ -420,7 +459,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
hwif->swdma_mask = 0x07;

if (!hwif->udma_four)
hwif->udma_four = (via_80w >> hwif->channel) & 1;
hwif->udma_four = (vdev->via_80w >> hwif->channel) & 1;
hwif->ide_dma_check = &via82cxxx_ide_dma_check;
if (!noautodma)
hwif->autodma = 1;
Expand Down

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