diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/pata_cs5536.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c index dec1b6c4b351..0448860a2077 100644 --- a/drivers/ata/pata_cs5536.c +++ b/drivers/ata/pata_cs5536.c @@ -38,6 +38,7 @@ #include <linux/delay.h> #include <linux/libata.h> #include <scsi/scsi_host.h> +#include <linux/dmi.h> #ifdef CONFIG_X86_32 #include <asm/msr.h> @@ -80,6 +81,21 @@ enum { IDE_ETC_UDMA_MASK = 0xc0, }; +/* Some Bachmann OT200 devices have a non working UDMA support due a + * missing resistor. + */ +static const struct dmi_system_id udma_quirk_dmi_table[] = { + { + .ident = "Bachmann electronic OT200", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Bachmann electronic"), + DMI_MATCH(DMI_PRODUCT_NAME, "OT200"), + DMI_MATCH(DMI_PRODUCT_VERSION, "1") + }, + }, + { } +}; + static int cs5536_read(struct pci_dev *pdev, int reg, u32 *val) { if (unlikely(use_msr)) { @@ -242,9 +258,23 @@ static int cs5536_init_one(struct pci_dev *dev, const struct pci_device_id *id) .port_ops = &cs5536_port_ops, }; - const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; + static const struct ata_port_info no_udma_info = { + .flags = ATA_FLAG_SLAVE_POSS, + .pio_mask = ATA_PIO4, + .port_ops = &cs5536_port_ops, + }; + + + const struct ata_port_info *ppi[2]; u32 cfg; + if (dmi_check_system(udma_quirk_dmi_table)) + ppi[0] = &no_udma_info; + else + ppi[0] = &info; + + ppi[1] = &ata_dummy_port_info; + if (use_msr) printk(KERN_ERR DRV_NAME ": Using MSR regs instead of PCI\n"); |