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>

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,
 };