From 606254e3c1faeb091203c58c2da8e3e4433aae6d Mon Sep 17 00:00:00 2001
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Fri, 8 Oct 2010 18:57:45 +0400
Subject: [PATCH] pata_pdc202xx_old: implement sff_irq_check() method
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
drivers/ata/pata_pdc202xx_old.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index c39f213e1bbc..c2ed5868dda6 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -44,6 +44,27 @@ static void pdc202xx_exec_command(struct ata_port *ap,
ndelay(400);
}
+static bool pdc202xx_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long master = pci_resource_start(pdev, 4);
+ u8 sc1d = inb(master + 0x1d);
+
+ if (ap->port_no) {
+ /*
+ * bit 7: error, bit 6: interrupting,
+ * bit 5: FIFO full, bit 4: FIFO empty
+ */
+ return sc1d & 0x40;
+ } else {
+ /*
+ * bit 3: error, bit 2: interrupting,
+ * bit 1: FIFO full, bit 0: FIFO empty
+ */
+ return sc1d & 0x04;
+ }
+}
+
/**
* pdc202xx_configure_piomode - set chip PIO timing
* @ap: ATA interface
@@ -282,6 +303,7 @@ static struct ata_port_operations pdc2024x_port_ops = {
.set_dmamode = pdc202xx_set_dmamode,
.sff_exec_command = pdc202xx_exec_command,
+ .sff_irq_check = pdc202xx_irq_check,
};
static struct ata_port_operations pdc2026x_port_ops = {
@@ -297,6 +319,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
.port_start = pdc2026x_port_start,
.sff_exec_command = pdc202xx_exec_command,
+ .sff_irq_check = pdc202xx_irq_check,
};
static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
--
GitLab