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Subject[RFC] SIS5513 ATA100 support
Daniela,

here's my first patch to sis5513.c : this should set the correct timings
for ATA100 chips (and hopefully say goodbye to heavy fs corruption in
UDMA modes).

It compiles cleanly but is **not yet tested**. I'm currently waiting for
~30GB to move from my test drive to a safe location (gory details:
source DMA drive, destination PIO drive, accross NFS on a 100kKiB :-P
full-duplex Ethernet).

If there's an obvious mistake please tell me (I've a couple of hours to
wait for the transfer before testing with and without the patch on a
"blank" ATA-100 drive).

If others want to have a look or even (I repeat **not yet tested**) try
this code **on backuped data** they're more than welcome.

If you want to have a quick look at the whole new sis5513.c :

http://gyver.homeip.net/sis5513.c



I'm now on to a more general sis5513.c cleanup :

1/ There is some suspicious code (sis_get_info seems broken to me from
ATA66 on and config_art_rwp_pio is not yet ATA100-chip friendly)
2/ I'll probably move to per chip types funcs as the current generic
ones become uglier and uglier at each new sis chipset).


LB
--- linux-orig/drivers/ide/sis5513.c Fri Sep 7 18:28:38 2001
+++ linux/drivers/ide/sis5513.c Mon Dec 24 22:46:21 2001
@@ -32,11 +32,13 @@
#define SIS5513_DEBUG_DRIVE_INFO 0

static struct pci_dev *host_dev = NULL;
+static unsigned int capabilities = 0;

#define SIS5513_FLAG_ATA_00 0x00000000
#define SIS5513_FLAG_ATA_16 0x00000001
#define SIS5513_FLAG_ATA_33 0x00000002
#define SIS5513_FLAG_ATA_66 0x00000004
+#define SIS5513_FLAG_ATA_100 0x00000008
#define SIS5513_FLAG_LATENCY 0x00000010

static const struct {
@@ -48,15 +50,15 @@
{ "SiS540", PCI_DEVICE_ID_SI_540, SIS5513_FLAG_ATA_66, },
{ "SiS620", PCI_DEVICE_ID_SI_620, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
{ "SiS630", PCI_DEVICE_ID_SI_630, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS635", PCI_DEVICE_ID_SI_635, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS635", PCI_DEVICE_ID_SI_635, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
{ "SiS640", PCI_DEVICE_ID_SI_640, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS645", PCI_DEVICE_ID_SI_645, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS650", PCI_DEVICE_ID_SI_650, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS730", PCI_DEVICE_ID_SI_730, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS735", PCI_DEVICE_ID_SI_735, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS740", PCI_DEVICE_ID_SI_740, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS745", PCI_DEVICE_ID_SI_745, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
- { "SiS750", PCI_DEVICE_ID_SI_750, SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS645", PCI_DEVICE_ID_SI_645, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS650", PCI_DEVICE_ID_SI_650, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS730", PCI_DEVICE_ID_SI_730, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS735", PCI_DEVICE_ID_SI_735, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS740", PCI_DEVICE_ID_SI_740, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS745", PCI_DEVICE_ID_SI_745, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
+ { "SiS750", PCI_DEVICE_ID_SI_750, SIS5513_FLAG_ATA_100|SIS5513_FLAG_ATA_66|SIS5513_FLAG_LATENCY, },
{ "SiS5591", PCI_DEVICE_ID_SI_5591, SIS5513_FLAG_ATA_33, },
{ "SiS5597", PCI_DEVICE_ID_SI_5597, SIS5513_FLAG_ATA_33, },
{ "SiS5600", PCI_DEVICE_ID_SI_5600, SIS5513_FLAG_ATA_33, },
@@ -229,6 +231,7 @@
byte sis_proc = 0;
extern char *ide_xfer_verbose (byte xfer_rate);

+/* Enables Prefetch and Postwrite on drive */
static void config_drive_art_rwp (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
@@ -298,8 +301,8 @@
* Do a blanket clear of active and recovery timings.
*/

- test1 &= ~0x07;
- test2 &= ~0x0F;
+ test1 &= ~0x0F;
+ test2 &= ~0x07;

switch(timing) {
case 4: test1 |= 0x01; test2 |= 0x03; break;
@@ -379,6 +382,7 @@
pci_read_config_byte(dev, drive_pci, &test1);
pci_read_config_byte(dev, drive_pci|0x01, &test2);

+ /* If not an UDMA mode switch off udma bit */
if ((speed <= XFER_MW_DMA_2) && (test2 & 0x80)) {
pci_write_config_byte(dev, drive_pci|0x01, test2 & ~0x80);
pci_read_config_byte(dev, drive_pci|0x01, &test2);
@@ -386,7 +390,31 @@
pci_write_config_byte(dev, drive_pci|0x01, test2 & ~unmask);
}

- switch(speed) {
+ if (capabilities & SIS5513_FLAG_ATA_100) {
+ switch(speed) {
+#ifdef CONFIG_BLK_DEV_IDEDMA
+ case XFER_UDMA_5: mask = 0x01; break;
+ case XFER_UDMA_4: mask = 0x02; break;
+ case XFER_UDMA_3: mask = 0x04; break;
+ case XFER_UDMA_2: mask = 0x05; break;
+ case XFER_UDMA_1: mask = 0x07; break;
+ case XFER_UDMA_0: mask = 0x0B; break;
+ 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: break;
+#endif /* CONFIG_BLK_DEV_IDEDMA */
+ case XFER_PIO_4: return((int) config_chipset_for_pio(drive, 4));
+ case XFER_PIO_3: return((int) config_chipset_for_pio(drive, 3));
+ case XFER_PIO_2: return((int) config_chipset_for_pio(drive, 2));
+ case XFER_PIO_1: return((int) config_chipset_for_pio(drive, 1));
+ case XFER_PIO_0:
+ default: return((int) config_chipset_for_pio(drive, 0));
+ }
+ } else {
+ switch(speed) {
#ifdef CONFIG_BLK_DEV_IDEDMA
case XFER_UDMA_5: mask = 0x80; break;
case XFER_UDMA_4: mask = 0x90; break;
@@ -407,6 +435,7 @@
case XFER_PIO_1: return((int) config_chipset_for_pio(drive, 1));
case XFER_PIO_0:
default: return((int) config_chipset_for_pio(drive, 0));
+ }
}

if (speed > XFER_MW_DMA_2)
@@ -583,6 +612,7 @@
continue;

host_dev = host;
+ capabilities = SiSHostChipInfo[i].flags;
printk(SiSHostChipInfo[i].name);
printk("\n");
if (SiSHostChipInfo[i].flags & SIS5513_FLAG_LATENCY) {
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