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Diffstat (limited to 'drivers/ata/pata_efar.c')
-rw-r--r--drivers/ata/pata_efar.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index b2e71e6473e..3bac0e07969 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -2,7 +2,7 @@
* pata_efar.c - EFAR PIIX clone controller driver
*
* (C) 2005 Red Hat
- * (C) 2009 Bartlomiej Zolnierkiewicz
+ * (C) 2009-2010 Bartlomiej Zolnierkiewicz
*
* Some parts based on ata_piix.c by Jeff Garzik and others.
*
@@ -68,6 +68,8 @@ static int efar_cable_detect(struct ata_port *ap)
return ATA_CBL_PATA80;
}
+static DEFINE_SPINLOCK(efar_lock);
+
/**
* efar_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
@@ -84,7 +86,9 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev)
unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
unsigned int idetm_port= ap->port_no ? 0x42 : 0x40;
+ unsigned long flags;
u16 idetm_data;
+ u8 udma_enable;
int control = 0;
/*
@@ -107,6 +111,8 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev)
if (adev->class == ATA_DEV_ATA)
control |= 4; /* PPE */
+ spin_lock_irqsave(&efar_lock, flags);
+
pci_read_config_word(dev, idetm_port, &idetm_data);
/* Set PPE, IE, and TIME as appropriate */
@@ -131,6 +137,11 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev)
idetm_data |= 0x4000; /* Ensure SITRE is set */
pci_write_config_word(dev, idetm_port, idetm_data);
+
+ pci_read_config_byte(dev, 0x48, &udma_enable);
+ udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
+ pci_write_config_byte(dev, 0x48, udma_enable);
+ spin_unlock_irqrestore(&efar_lock, flags);
}
/**
@@ -151,6 +162,7 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev)
u16 master_data;
u8 speed = adev->dma_mode;
int devid = adev->devno + 2 * ap->port_no;
+ unsigned long flags;
u8 udma_enable;
static const /* ISP RTC */
@@ -160,6 +172,8 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev)
{ 2, 1 },
{ 2, 3 }, };
+ spin_lock_irqsave(&efar_lock, flags);
+
pci_read_config_word(dev, master_port, &master_data);
pci_read_config_byte(dev, 0x48, &udma_enable);
@@ -217,6 +231,7 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev)
pci_write_config_word(dev, master_port, master_data);
}
pci_write_config_byte(dev, 0x48, udma_enable);
+ spin_unlock_irqrestore(&efar_lock, flags);
}
static struct scsi_host_template efar_sht = {
@@ -256,13 +271,14 @@ static int efar_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
.udma_mask = ATA_UDMA4,
.port_ops = &efar_ops,
};
- const struct ata_port_info *ppi[] = { &info, NULL };
+ const struct ata_port_info *ppi[] = { &info, &info };
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev,
"version " DRV_VERSION "\n");
- return ata_pci_sff_init_one(pdev, ppi, &efar_sht, NULL);
+ return ata_pci_sff_init_one(pdev, ppi, &efar_sht, NULL,
+ ATA_HOST_PARALLEL_SCAN);
}
static const struct pci_device_id efar_pci_tbl[] = {