[PATCH] pata_cmd64x: suspend/resume

On a resume of the CMD64x we must restore MRDMODE and latency if the BIOS
didn't get them right originally.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index 29a60df465da..3376f3f4bad9 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -31,7 +31,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.1"
+#define DRV_VERSION "0.2.2"
 
 /*
  * CMD64x specific registers definition.
@@ -277,6 +277,8 @@ static struct scsi_host_template cmd64x_sht = {
         .slave_configure        = ata_scsi_slave_config,
         .slave_destroy          = ata_scsi_slave_destroy,
         .bios_param             = ata_std_bios_param,
+        .resume                 = ata_scsi_device_resume,
+        .suspend                = ata_scsi_device_suspend,
 };
 
 static struct ata_port_operations cmd64x_port_ops = {
@@ -469,6 +471,20 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         return ata_pci_init_one(pdev, port_info, 2);
 }
 
+static int cmd64x_reinit_one(struct pci_dev *pdev)
+{
+        u8 mrdmode;
+        pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
+        pci_read_config_byte(pdev, MRDMODE, &mrdmode);
+        mrdmode &= ~ 0x30;      /* IRQ set up */
+        mrdmode |= 0x02;        /* Memory read line enable */
+        pci_write_config_byte(pdev, MRDMODE, mrdmode);
+#ifdef CONFIG_PPC
+        pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
+#endif
+        return ata_pci_device_resume(pdev);
+}
+
 static const struct pci_device_id cmd64x[] = {
         { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
         { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
@@ -482,7 +498,9 @@ static struct pci_driver cmd64x_pci_driver = {
         .name           = DRV_NAME,
         .id_table       = cmd64x,
         .probe          = cmd64x_init_one,
-        .remove         = ata_pci_remove_one
+        .remove         = ata_pci_remove_one,
+        .suspend        = ata_pci_device_suspend,
+        .resume         = cmd64x_reinit_one,
 };
 
 static int __init cmd64x_init(void)