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authorAlan <alan@lxorguk.ukuu.org.uk>2006-11-22 17:28:41 +0000
committerJeff Garzik <jeff@garzik.org>2006-12-01 22:46:46 -0500
commit8550c1637ba7dd96a76353eb52d31088f9c2f5fe (patch)
tree86b56ff88f5b9f74df07922e4c601cde2e9cd481 /drivers
parentad4a42d287546888349ad24d351673a59f429ee8 (diff)
[PATCH] pata_sil680 suspend/resume
The SI680 can come back from s2ram with the clocks disabled (crash time) or wrong (ugly as this can cause CRC errors, and in theory corruption). On a resume we must put the clock back. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/pata_sil680.c82
1 files changed, 55 insertions, 27 deletions
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 11942fd03b5..5d3b42ec8e4 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -33,7 +33,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_sil680"
-#define DRV_VERSION "0.3.2"
+#define DRV_VERSION "0.4.1"
/**
* sil680_selreg - return register base
@@ -263,32 +263,20 @@ static struct ata_port_operations sil680_port_ops = {
.host_stop = ata_host_stop
};
-static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+/**
+ * sil680_init_chip - chip setup
+ * @pdev: PCI device
+ *
+ * Perform all the chip setup which must be done both when the device
+ * is powered up on boot and when we resume in case we resumed from RAM.
+ * Returns the final clock settings.
+ */
+
+static u8 sil680_init_chip(struct pci_dev *pdev)
{
- static struct ata_port_info info = {
- .sht = &sil680_sht,
- .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
- .pio_mask = 0x1f,
- .mwdma_mask = 0x07,
- .udma_mask = 0x7f,
- .port_ops = &sil680_port_ops
- };
- static struct ata_port_info info_slow = {
- .sht = &sil680_sht,
- .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
- .pio_mask = 0x1f,
- .mwdma_mask = 0x07,
- .udma_mask = 0x3f,
- .port_ops = &sil680_port_ops
- };
- static struct ata_port_info *port_info[2] = {&info, &info};
- static int printed_version;
u32 class_rev = 0;
u8 tmpbyte = 0;
- if (!printed_version++)
- dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
-
pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
/* FIXME: double check */
@@ -323,8 +311,6 @@ static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
pci_read_config_byte(pdev, 0x8A, &tmpbyte);
printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
tmpbyte & 1, tmpbyte & 0x30);
- if ((tmpbyte & 0x30) == 0)
- port_info[0] = port_info[1] = &info_slow;
pci_write_config_byte(pdev, 0xA1, 0x72);
pci_write_config_word(pdev, 0xA2, 0x328A);
@@ -343,11 +329,51 @@ static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
/* This last case is _NOT_ ok */
case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
- return -EIO;
+ }
+ return tmpbyte & 0x30;
+}
+
+static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ static struct ata_port_info info = {
+ .sht = &sil680_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = 0x7f,
+ .port_ops = &sil680_port_ops
+ };
+ static struct ata_port_info info_slow = {
+ .sht = &sil680_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = 0x3f,
+ .port_ops = &sil680_port_ops
+ };
+ static struct ata_port_info *port_info[2] = {&info, &info};
+ static int printed_version;
+
+ if (!printed_version++)
+ dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+
+ switch(sil680_init_chip(pdev))
+ {
+ case 0:
+ port_info[0] = port_info[1] = &info_slow;
+ break;
+ case 0x30:
+ return -ENODEV;
}
return ata_pci_init_one(pdev, port_info, 2);
}
+static int sil680_reinit_one(struct pci_dev *pdev)
+{
+ sil680_init_chip(pdev);
+ return ata_pci_device_resume(pdev);
+}
+
static const struct pci_device_id sil680[] = {
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
@@ -358,7 +384,9 @@ static struct pci_driver sil680_pci_driver = {
.name = DRV_NAME,
.id_table = sil680,
.probe = sil680_init_one,
- .remove = ata_pci_remove_one
+ .remove = ata_pci_remove_one,
+ .suspend = ata_pci_device_suspend,
+ .resume = sil680_reinit_one,
};
static int __init sil680_init(void)