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sis5513: DMA setup fixes
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* Add sis_ata133_get_base() helper function for obtaining the address of
  the drive control registers on chipset_family == ATA_133 chipsets.

* Add three helper functions for programming PIO/MWDMA timings:
  - sis_ata16_program_timings()  (for ATA_16/33/66/100a chipset families)
  - sis_ata100_program_timings() (for ATA_100/133a chipset families)
  - sis_ata133_program_timings() (for ATA_133 chipset family)

  MWDMA timings are taken from datasheets and they match ATA spec.

* Add generic helper function sis_program_timings() and use it in
  ->set_pio_mode and ->set_dma_mode methods (previously the driver
  depended on BIOS to program the correct MWDMA timings).

* Remove redundant !chipset_family check from init_hwif_sis5513()
  (init_chipset_sis5513() guarantees that we will never get here if
   chipset_family cannot be determined).

* SWDMA seems to be unsupported by SiS chipsets (no info about SWDMA in
  datasheets and for SWDMA0 mode timing requirements are impossible to
  fulfill) so remove ->swdma_mask from init_hwif_sis5513() and handling
  of SWDMA modes from sis_set_dma_mode().

* Enable DMA support for chipset_family == ATA_16.

* Bump driver version.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz committed Oct 16, 2007
1 parent a29ec3b commit c77a89c
Showing 1 changed file with 106 additions and 108 deletions.
214 changes: 106 additions & 108 deletions drivers/ide/pci/sis5513.c
View file
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/sis5513.c Version 0.27 Jul 14, 2007
* linux/drivers/ide/pci/sis5513.c Version 0.28 Aug 1, 2007
*
* Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
Expand Down Expand Up @@ -433,6 +433,95 @@ static int sis_get_info (char *buffer, char **addr, off_t offset, int count)
/*
* Configuration functions
*/

static u8 sis_ata133_get_base(ide_drive_t *drive)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u32 reg54 = 0;

pci_read_config_dword(dev, 0x54, &reg54);

return ((reg54 & 0x40000000) ? 0x70 : 0x40) + drive->dn * 4;
}

static void sis_ata16_program_timings(ide_drive_t *drive, const u8 mode)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u16 t1 = 0;
u8 drive_pci = 0x40 + drive->dn * 2;

const u16 pio_timings[] = { 0x000, 0x607, 0x404, 0x303, 0x301 };
const u16 mwdma_timings[] = { 0x008, 0x302, 0x301 };

pci_read_config_word(dev, drive_pci, &t1);

/* clear active/recovery timings */
t1 &= ~0x070f;
if (mode >= XFER_MW_DMA_0) {
if (chipset_family > ATA_16)
t1 &= ~0x8000; /* disable UDMA */
t1 |= mwdma_timings[mode - XFER_MW_DMA_0];
} else
t1 |= pio_timings[mode - XFER_PIO_0];

pci_write_config_word(dev, drive_pci, t1);
}

static void sis_ata100_program_timings(ide_drive_t *drive, const u8 mode)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u8 t1, drive_pci = 0x40 + drive->dn * 2;

/* timing bits: 7:4 active 3:0 recovery */
const u8 pio_timings[] = { 0x00, 0x67, 0x44, 0x33, 0x31 };
const u8 mwdma_timings[] = { 0x08, 0x32, 0x31 };

if (mode >= XFER_MW_DMA_0) {
u8 t2 = 0;

pci_read_config_byte(dev, drive_pci, &t2);
t2 &= ~0x80; /* disable UDMA */
pci_write_config_byte(dev, drive_pci, t2);

t1 = mwdma_timings[mode - XFER_MW_DMA_0];
} else
t1 = pio_timings[mode - XFER_PIO_0];

pci_write_config_byte(dev, drive_pci + 1, t1);
}

static void sis_ata133_program_timings(ide_drive_t *drive, const u8 mode)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u32 t1 = 0;
u8 drive_pci = sis_ata133_get_base(drive), clk, idx;

pci_read_config_dword(dev, drive_pci, &t1);

t1 &= 0xc0c00fff;
clk = (t1 & 0x08) ? ATA_133 : ATA_100;
if (mode >= XFER_MW_DMA_0) {
t1 &= ~0x04; /* disable UDMA */
idx = mode - XFER_MW_DMA_0 + 5;
}
idx = mode - XFER_PIO_0;
t1 |= ini_time_value[clk][idx] << 12;
t1 |= act_time_value[clk][idx] << 16;
t1 |= rco_time_value[clk][idx] << 24;

pci_write_config_dword(dev, drive_pci, t1);
}

static void sis_program_timings(ide_drive_t *drive, const u8 mode)
{
if (chipset_family < ATA_100) /* ATA_16/33/66/100a */
sis_ata16_program_timings(drive, mode);
else if (chipset_family < ATA_133) /* ATA_100/133a */
sis_ata100_program_timings(drive, mode);
else /* ATA_133 */
sis_ata133_program_timings(drive, mode);
}

/* Enables per-drive prefetch and postwrite */
static void config_drive_art_rwp (ide_drive_t *drive)
{
Expand All @@ -450,105 +539,16 @@ static void config_drive_art_rwp (ide_drive_t *drive)
pci_write_config_byte(dev, 0x4b, reg4bh|rw_prefetch);
}

/* Set per-drive active and recovery time */
static void sis_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;

u8 drive_pci, test1, test2;

config_drive_art_rwp(drive);

/* In pre ATA_133 case, drives sit at 0x40 + 4*drive->dn */
drive_pci = 0x40;
/* In SiS962 case drives sit at (0x40 or 0x70) + 8*drive->dn) */
if (chipset_family >= ATA_133) {
u32 reg54h;
pci_read_config_dword(dev, 0x54, &reg54h);
if (reg54h & 0x40000000) drive_pci = 0x70;
drive_pci += ((drive->dn)*0x4);
} else {
drive_pci += ((drive->dn)*0x2);
}

/* register layout changed with newer ATA100 chips */
if (chipset_family < ATA_100) {
pci_read_config_byte(dev, drive_pci, &test1);
pci_read_config_byte(dev, drive_pci+1, &test2);

/* Clear active and recovery timings */
test1 &= ~0x0F;
test2 &= ~0x07;

switch(pio) {
case 4: test1 |= 0x01; test2 |= 0x03; break;
case 3: test1 |= 0x03; test2 |= 0x03; break;
case 2: test1 |= 0x04; test2 |= 0x04; break;
case 1: test1 |= 0x07; test2 |= 0x06; break;
case 0: /* PIO0: register setting == X000 */
default: break;
}
pci_write_config_byte(dev, drive_pci, test1);
pci_write_config_byte(dev, drive_pci+1, test2);
} else if (chipset_family < ATA_133) {
switch(pio) { /* active recovery
v v */
case 4: test1 = 0x30|0x01; break;
case 3: test1 = 0x30|0x03; break;
case 2: test1 = 0x40|0x04; break;
case 1: test1 = 0x60|0x07; break;
case 0: test1 = 0x00; break;
default: break;
}
pci_write_config_byte(dev, drive_pci, test1);
} else { /* ATA_133 */
u32 test3;
pci_read_config_dword(dev, drive_pci, &test3);
test3 &= 0xc0c00fff;
if (test3 & 0x08) {
test3 |= ini_time_value[ATA_133][pio] << 12;
test3 |= act_time_value[ATA_133][pio] << 16;
test3 |= rco_time_value[ATA_133][pio] << 24;
} else {
test3 |= ini_time_value[ATA_100][pio] << 12;
test3 |= act_time_value[ATA_100][pio] << 16;
test3 |= rco_time_value[ATA_100][pio] << 24;
}
pci_write_config_dword(dev, drive_pci, test3);
}
sis_program_timings(drive, XFER_PIO_0 + pio);
}

static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u32 regdw;
u8 drive_pci, reg;

/* See sis_set_pio_mode() for drive PCI config registers */
drive_pci = 0x40;
if (chipset_family >= ATA_133) {
u32 reg54h;
pci_read_config_dword(dev, 0x54, &reg54h);
if (reg54h & 0x40000000) drive_pci = 0x70;
drive_pci += ((drive->dn)*0x4);
pci_read_config_dword(dev, (unsigned long)drive_pci, &regdw);
/* Disable UDMA bit for non UDMA modes on UDMA chips */
if (speed < XFER_UDMA_0) {
regdw &= 0xfffffffb;
pci_write_config_dword(dev, (unsigned long)drive_pci, regdw);
}

} else {
drive_pci += ((drive->dn)*0x2);
pci_read_config_byte(dev, drive_pci+1, &reg);
/* Disable UDMA bit for non UDMA modes on UDMA chips */
if ((speed < XFER_UDMA_0) && (chipset_family > ATA_16)) {
reg &= 0x7F;
pci_write_config_byte(dev, drive_pci+1, reg);
}
}

/* Config chip for mode */
switch(speed) {
Expand All @@ -560,6 +560,10 @@ static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
case XFER_UDMA_1:
case XFER_UDMA_0:
if (chipset_family >= ATA_133) {
u32 regdw = 0;
u8 drive_pci = sis_ata133_get_base(drive);

pci_read_config_dword(dev, drive_pci, &regdw);
regdw |= 0x04;
regdw &= 0xfffff00f;
/* check if ATA133 enable */
Expand All @@ -572,6 +576,9 @@ static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
}
pci_write_config_dword(dev, (unsigned long)drive_pci, regdw);
} else {
u8 drive_pci = 0x40 + drive->dn * 2, reg = 0;

pci_read_config_byte(dev, drive_pci+1, &reg);
/* Force the UDMA bit on if we want to use UDMA */
reg |= 0x80;
/* clean reg cycle time bits */
Expand All @@ -586,9 +593,7 @@ static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
case XFER_MW_DMA_2:
case XFER_MW_DMA_1:
case XFER_MW_DMA_0:
case XFER_SW_DMA_2:
case XFER_SW_DMA_1:
case XFER_SW_DMA_0:
sis_program_timings(drive, speed);
break;
default:
BUG();
Expand Down Expand Up @@ -617,11 +622,9 @@ static int sis5513_config_xfer_rate(ide_drive_t *drive)
static u8 sis5513_ata133_udma_filter(ide_drive_t *drive)
{
struct pci_dev *dev = drive->hwif->pci_dev;
int drive_pci;
u32 reg54 = 0, regdw = 0;
u32 regdw = 0;
u8 drive_pci = sis_ata133_get_base(drive);

pci_read_config_dword(dev, 0x54, &reg54);
drive_pci = ((reg54 & 0x40000000) ? 0x70 : 0x40) + drive->dn * 4;
pci_read_config_dword(dev, drive_pci, &regdw);

/* if ATA133 disable, we should not set speed above UDMA5 */
Expand Down Expand Up @@ -848,22 +851,17 @@ static void __devinit init_hwif_sis5513 (ide_hwif_t *hwif)

hwif->ultra_mask = udma_rates[chipset_family];
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;

if (!chipset_family)
return;

if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = ata66_sis5513(hwif);

if (chipset_family > ATA_16) {
hwif->ide_dma_check = &sis5513_config_xfer_rate;
if (!noautodma)
hwif->autodma = 1;
}
hwif->ide_dma_check = &sis5513_config_xfer_rate;

if (!noautodma)
hwif->autodma = 1;

hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
return;
}

static ide_pci_device_t sis5513_chipset __devinitdata = {
Expand Down

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