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path: root/drivers/ide/pci/alim15x3.c
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Diffstat (limited to 'drivers/ide/pci/alim15x3.c')
-rw-r--r--drivers/ide/pci/alim15x3.c42
1 files changed, 13 insertions, 29 deletions
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index c1922f9cfe8..f2129d5e07f 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -39,6 +39,16 @@
#include <asm/io.h>
/*
+ * Allow UDMA on M1543C-E chipset for WDC disks that ignore CRC checking
+ * (this is DANGEROUS and could result in data corruption).
+ */
+static int wdc_udma;
+
+module_param(wdc_udma, bool, 0);
+MODULE_PARM_DESC(wdc_udma,
+ "allow UDMA on M1543C-E chipset for WDC disks (DANGEROUS)");
+
+/*
* ALi devices are not plug in. Otherwise these static values would
* need to go. They ought to go away anyway
*/
@@ -76,11 +86,6 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
a_clc = 0;
c_time = ide_pio_timings[pio].cycle_time;
-#if 0
- if ((r_clc = ((c_time - s_time - a_time) * bus_speed + 999) / 1000) >= 16)
- r_clc = 0;
-#endif
-
if (!(r_clc = (c_time * bus_speed + 999) / 1000 - a_clc - s_clc)) {
r_clc = 1;
} else {
@@ -110,16 +115,6 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
pci_write_config_byte(dev, port, s_clc);
pci_write_config_byte(dev, port+drive->select.b.unit+2, (a_clc << 4) | r_clc);
local_irq_restore(flags);
-
- /*
- * setup active rec
- * { 70, 165, 365 }, PIO Mode 0
- * { 50, 125, 208 }, PIO Mode 1
- * { 30, 100, 110 }, PIO Mode 2
- * { 30, 80, 70 }, PIO Mode 3 with IORDY
- * { 25, 70, 25 }, PIO Mode 4 with IORDY ns
- * { 20, 50, 30 } PIO Mode 5 with IORDY (nonstandard)
- */
}
/**
@@ -131,9 +126,7 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
* The actual rules for the ALi are:
* No UDMA on revisions <= 0x20
* Disk only for revisions < 0xC2
- * Not WDC drives for revisions < 0xC2
- *
- * FIXME: WDC ifdef needs to die
+ * Not WDC drives on M1543C-E (?)
*/
static u8 ali_udma_filter(ide_drive_t *drive)
@@ -141,10 +134,9 @@ static u8 ali_udma_filter(ide_drive_t *drive)
if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
if (drive->media != ide_disk)
return 0;
-#ifndef CONFIG_WDC_ALI15X3
- if (chip_is_1543c_e && strstr(drive->id->model, "WDC "))
+ if (chip_is_1543c_e && strstr(drive->id->model, "WDC ") &&
+ wdc_udma == 0)
return 0;
-#endif
}
return drive->hwif->ultra_mask;
@@ -537,17 +529,9 @@ static const struct ide_port_info ali15x3_chipset __devinitdata = {
static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
- static struct pci_device_id ati_rs100[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100) },
- { },
- };
-
struct ide_port_info d = ali15x3_chipset;
u8 rev = dev->revision, idx = id->driver_data;
- if (pci_dev_present(ati_rs100))
- printk(KERN_WARNING "alim15x3: ATI Radeon IGP Northbridge is not yet fully tested.\n");
-
/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
if (rev <= 0xC4)
d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;