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Subject[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>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c linux-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c
--- linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c 2006-11-15 13:25:59.000000000 +0000
+++ linux-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c 2006-11-22 15:47:25.680962200 +0000
@@ -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.
@@ -276,6 +276,8 @@
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.bios_param = ata_std_bios_param,
+ .resume = ata_scsi_device_resume,
+ .suspend = ata_scsi_device_suspend,
};

static struct ata_port_operations cmd64x_port_ops = {
@@ -468,6 +470,20 @@
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 },
@@ -481,7 +497,9 @@
.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)
-
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