[PATCH] pata_jmicron: fix JMB368 support, add suspend/resume handling

This (and the pci resume quirk code) get the JMicron controllers to
resume properly. Without this patch the drive mapping changes when you
suspend/resume which is not good at all....

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

1 files changed, 28 insertions, 6 deletions

diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 0210b10d49cd..c9f0a543b27b 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -19,7 +19,7 @@
 #include <linux/ata.h>
 
 #define DRV_NAME        "pata_jmicron"
-#define DRV_VERSION     "0.1.2"
+#define DRV_VERSION     "0.1.4"
 
 typedef enum {
         PORT_PATA0 = 0,
@@ -213,12 +213,11 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 
                 /* FIXME: We may want a way to override this in future */
                 pci_write_config_byte(pdev, 0x41, 0xa1);
-        }
-
-        /* PATA controller is fn 1, AHCI is fn 0 */
-        if (PCI_FUNC(pdev->devfn) != 1)
-                return -ENODEV;
 
+                /* PATA controller is fn 1, AHCI is fn 0 */
+                if (PCI_FUNC(pdev->devfn) != 1)
+                        return -ENODEV;
+        }
         if ( id->driver_data == 365 || id->driver_data == 366) {
                 /* The 365/66 have two PATA channels, redirect the second */
                 pci_read_config_dword(pdev, 0x80, &reg);
@@ -229,6 +228,27 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
         return ata_pci_init_one(pdev, port_info, 2);
 }
 
+static int jmicron_reinit_one(struct pci_dev *pdev)
+{
+        u32 reg;
+        
+        switch(pdev->device) {
+                case PCI_DEVICE_ID_JMICRON_JMB368:
+                        break;
+                case PCI_DEVICE_ID_JMICRON_JMB365:
+                case PCI_DEVICE_ID_JMICRON_JMB366:
+                        /* Restore mapping or disks swap and boy does it get ugly */
+                        pci_read_config_dword(pdev, 0x80, &reg);
+                        reg |= (1 << 24);       /* IDE1 to PATA IDE secondary */
+                        pci_write_config_dword(pdev, 0x80, reg);
+                        /* Fall through */
+                default:
+                        /* Make sure AHCI is turned back on */
+                        pci_write_config_byte(pdev, 0x41, 0xa1);
+        }
+        return ata_pci_device_resume(pdev);
+}
+
 static const struct pci_device_id jmicron_pci_tbl[] = {
         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
@@ -244,6 +264,8 @@ static struct pci_driver jmicron_pci_driver = {
         .id_table               = jmicron_pci_tbl,
         .probe                  = jmicron_init_one,
         .remove                 = ata_pci_remove_one,
+        .suspend                = ata_pci_device_suspend,
+        .resume                 = jmicron_reinit_one,
 };
 
 static int __init jmicron_init(void)