[PATCH] sata_sil24: add suspend/sleep support

Add suspend/sleep support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 1850c2e3aa21..2e0f4a4076af 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -92,6 +92,7 @@ enum {
         HOST_CTRL_STOP          = (1 << 18), /* latched PCI STOP */
         HOST_CTRL_DEVSEL        = (1 << 19), /* latched PCI DEVSEL */
         HOST_CTRL_REQ64         = (1 << 20), /* latched PCI REQ64 */
+        HOST_CTRL_GLOBAL_RST    = (1 << 31), /* global reset */
 
         /*
          * Port registers
@@ -338,6 +339,7 @@ static int sil24_port_start(struct ata_port *ap);
 static void sil24_port_stop(struct ata_port *ap);
 static void sil24_host_stop(struct ata_host_set *host_set);
 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
+static int sil24_pci_device_resume(struct pci_dev *pdev);
 
 static const struct pci_device_id sil24_pci_tbl[] = {
         { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
@@ -353,6 +355,8 @@ static struct pci_driver sil24_pci_driver = {
         .id_table               = sil24_pci_tbl,
         .probe                  = sil24_init_one,
         .remove                 = ata_pci_remove_one, /* safe? */
+        .suspend                = ata_pci_device_suspend,
+        .resume                 = sil24_pci_device_resume,
 };
 
 static struct scsi_host_template sil24_sht = {
@@ -372,6 +376,8 @@ static struct scsi_host_template sil24_sht = {
         .slave_configure        = ata_scsi_slave_config,
         .slave_destroy          = ata_scsi_slave_destroy,
         .bios_param             = ata_std_bios_param,
+        .suspend                = ata_scsi_device_suspend,
+        .resume                 = ata_scsi_device_resume,
 };
 
 static const struct ata_port_operations sil24_ops = {
@@ -1179,6 +1185,25 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         return rc;
 }
 
+static int sil24_pci_device_resume(struct pci_dev *pdev)
+{
+        struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
+        struct sil24_host_priv *hpriv = host_set->private_data;
+
+        ata_pci_device_do_resume(pdev);
+
+        if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
+                writel(HOST_CTRL_GLOBAL_RST, hpriv->host_base + HOST_CTRL);
+
+        sil24_init_controller(pdev, host_set->n_ports,
+                              host_set->ports[0]->flags,
+                              hpriv->host_base, hpriv->port_base);
+
+        ata_host_set_resume(host_set);
+
+        return 0;
+}
+
 static int __init sil24_init(void)
 {
         return pci_module_init(&sil24_pci_driver);