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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2012-03-11 23:28:18 +0400
committerJeff Garzik <jgarzik@redhat.com>2012-03-14 00:43:11 +0400
commitb8cec3c253a2a001e463c43260fb75fb3223a04d (patch)
treeb9ff972412409aabe4f167484e1d818c14420c8e /drivers/ata
parent419fd2461354f7675ef298fa26ffceff4d0b2168 (diff)
downloadlinux-b8cec3c253a2a001e463c43260fb75fb3223a04d.tar.xz
pata_cmd64x: implement sff_irq_check() method
Implement sff_irq_check() method for both old and new chips. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/pata_cmd64x.c43
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index d4f26a515ef8..1c17cd1e8b2d 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -33,7 +33,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.17"
+#define DRV_VERSION "0.2.18"
/*
* CMD64x specific registers definition.
@@ -230,6 +230,26 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
/**
+ * cmd64x_sff_irq_check - check IDE interrupt
+ * @ap: ATA interface
+ *
+ * Check IDE interrupt in CFR/ARTTIM23 registers.
+ */
+
+static bool cmd64x_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
+ int irq_reg = ap->port_no ? ARTTIM23 : CFR;
+ u8 irq_stat;
+
+ /* NOTE: reading the register should clear the interrupt */
+ pci_read_config_byte(pdev, irq_reg, &irq_stat);
+
+ return irq_stat & irq_mask;
+}
+
+/**
* cmd64x_sff_irq_clear - clear IDE interrupt
* @ap: ATA interface
*
@@ -249,6 +269,23 @@ static void cmd64x_sff_irq_clear(struct ata_port *ap)
}
/**
+ * cmd648_sff_irq_check - check IDE interrupt
+ * @ap: ATA interface
+ *
+ * Check IDE interrupt in MRDMODE register.
+ */
+
+static bool cmd648_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long base = pci_resource_start(pdev, 4);
+ int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
+ u8 mrdmode = inb(base + 1);
+
+ return mrdmode & irq_mask;
+}
+
+/**
* cmd648_sff_irq_clear - clear IDE interrupt
* @ap: ATA interface
*
@@ -294,12 +331,14 @@ static const struct ata_port_operations cmd64x_base_ops = {
static struct ata_port_operations cmd64x_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd64x_sff_irq_check,
.sff_irq_clear = cmd64x_sff_irq_clear,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd646r1_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd64x_sff_irq_check,
.sff_irq_clear = cmd64x_sff_irq_clear,
.bmdma_stop = cmd646r1_bmdma_stop,
.cable_detect = ata_cable_40wire,
@@ -307,12 +346,14 @@ static struct ata_port_operations cmd646r1_port_ops = {
static struct ata_port_operations cmd646r3_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd648_sff_irq_check,
.sff_irq_clear = cmd648_sff_irq_clear,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd648_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd648_sff_irq_check,
.sff_irq_clear = cmd648_sff_irq_clear,
.cable_detect = cmd648_cable_detect,
};