Subject: [PATCH 1/2] USB: serial: sierra driver adding suspend/resume
From: Elina Pasheva <epasheva@xxxxxxxxxxxxxxxxxx>
The following is summary of changes we have made to sierra.c driver in
[PATCH 1/2] sierra driver adding suspend/resume:
- Adding sierra_suspend(), sierra_resume() functions and support.
- Moved sierra_device structure at the bottom
- Added entries for suspend and resume interfaces to sierra_device structure.
Signed-off-by: Elina Pasheva <epasheva@xxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/sierra.c | 57 +++++++++++++++++++++++++++++-----
1 file changed, 49 insertions(+), 8 deletions(-)
--- a/drivers/usb/serial/sierra.c 2009-05-22 15:28:25.000000000 -0700
+++ a/drivers/usb/serial/sierra.c 2009-05-22 15:56:11.000000000 -0700
@@ -44,6 +44,7 @@
static int debug;
static int nmea;
+static int suspend_support;
/* Used in interface blacklisting */
struct sierra_iface_info {
@@ -245,14 +246,7 @@ static struct usb_device_id id_table []
};
MODULE_DEVICE_TABLE(usb, id_table);
-static struct usb_driver sierra_driver = {
- .name = "sierra",
- .probe = usb_serial_probe,
- .disconnect = usb_serial_disconnect,
- .id_table = id_table,
- .no_dynamic_id = 1,
-};
-
+/* per port private data */
struct sierra_port_private {
spinlock_t lock; /* lock the structure */
int outstanding_urbs; /* number of out urbs in flight */
@@ -840,6 +834,48 @@ static void sierra_shutdown(struct usb_s
}
}
+int sierra_suspend(struct usb_serial *serial, pm_message_t message)
+{
+ int i;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ /* The dummy interface doesn't prevent suspended state */
+ if (serial->num_ports == 0)
+ return 0;
+
+ if (!suspend_support)
+ return -EOPNOTSUPP;
+
+ for (i = 0; i < serial->num_ports ; i++)
+ sierra_stop_rx_urbs(serial->port[i]);
+ return 0;
+}
+
+int sierra_resume(struct usb_serial *serial)
+{
+ int i;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ for (i = 0; i < serial->num_ports ; i++)
+ sierra_submit_rx_urbs(serial->port[i], GFP_KERNEL);
+
+ return 0;
+}
+
+static struct usb_driver sierra_driver = {
+ .name = "sierra",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .suspend = usb_serial_suspend,
+ .resume = usb_serial_resume,
+ .id_table = id_table,
+
+ .no_dynamic_id = 1,
+ .supports_autosuspend = 1,
+};
+
static struct usb_serial_driver sierra_device = {
.driver = {
.owner = THIS_MODULE,
@@ -861,6 +897,8 @@ static struct usb_serial_driver sierra_d
.attach = sierra_startup,
.shutdown = sierra_shutdown,
.read_int_callback = sierra_instat_callback,
+ .suspend = sierra_suspend,
+ .resume = sierra_resume,
};
/* Functions used by new usb-serial code. */
@@ -906,3 +944,6 @@ MODULE_PARM_DESC(nmea, "NMEA streaming")
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug messages");
+
+module_param(suspend_support, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(suspend_support, "Selective Suspend support");
--
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