[PATCH] pata_amd: suspend/resume

From: Alan
Date: Mon Nov 27 2006 - 11:16:57 EST


Early AMD chips require FIFO and/or simplex flag clearing work on resume
from RAM. Most devices need no help

Signed-off-by: Alan Cox <alan@xxxxxxxxxx>

diff -u --exclude-from /usr/src/exclude --new-file --recursive linux.vanilla-2.6.19-rc6-mm1/drivers/ata/pata_amd.c linux-2.6.19-rc6-mm1/drivers/ata/pata_amd.c
--- linux.vanilla-2.6.19-rc6-mm1/drivers/ata/pata_amd.c 2006-11-24 13:58:05.000000000 +0000
+++ linux-2.6.19-rc6-mm1/drivers/ata/pata_amd.c 2006-11-24 14:21:56.000000000 +0000
@@ -25,7 +25,7 @@
#include <linux/libata.h>

#define DRV_NAME "pata_amd"
-#define DRV_VERSION "0.2.4"
+#define DRV_VERSION "0.2.7"

/**
* timing_setup - shared timing computation and load
@@ -334,6 +334,8 @@
.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 amd33_port_ops = {
@@ -661,6 +663,23 @@
return ata_pci_init_one(pdev, port_info, 2);
}

+static int amd_reinit_one(struct pci_dev *pdev)
+{
+ if (pdev->vendor == PCI_VENDOR_ID_AMD) {
+ u8 fifo;
+ pci_read_config_byte(pdev, 0x41, &fifo);
+ if (pdev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
+ /* FIFO is broken */
+ pci_write_config_byte(pdev, 0x41, fifo & 0x0F);
+ else
+ pci_write_config_byte(pdev, 0x41, fifo | 0xF0);
+ if (pdev->device == PCI_DEVICE_ID_AMD_VIPER_7409 ||
+ pdev->device == PCI_DEVICE_ID_AMD_COBRA_7401)
+ ata_pci_clear_simplex(pdev);
+ }
+ return ata_pci_device_resume(pdev);
+}
+
static const struct pci_device_id amd[] = {
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_COBRA_7401), 0 },
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7409), 1 },
@@ -688,7 +707,9 @@
.name = DRV_NAME,
.id_table = amd,
.probe = amd_init_one,
- .remove = ata_pci_remove_one
+ .remove = ata_pci_remove_one,
+ .suspend = ata_pci_device_suspend,
+ .resume = amd_reinit_one,
};

static int __init amd_init(void)
-
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