[patch 24/33] Input: appletouch - implement reset-resume logic

Greg KH
2008-08-04T20:29:47Z

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2.6.25-stable review patch. If anyone has any objections, please let us
know.

------------------

From: Oliver Neukum <oliver@neukum.org>

commit 90d95ef617a535a8832bdcb8dee07bf591e5dd82 upstream

On some boxes the touchpad needs to be reinitialized after resume to make
it function again. This fixes bugzilla #10825.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/input/mouse/appletouch.c | 49 ++++++++++++++++++++++++++++++++-------
drivers/usb/core/quirks.c | 3 ++
2 files changed, 44 insertions(+), 8 deletions(-)

--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -589,6 +589,21 @@ static void atp_close(struct input_dev *
dev->open = 0;
}

+static int atp_handle_geyser(struct atp *dev)
+{
+ struct usb_device *udev = dev->udev;
+
+ if (!atp_is_fountain(dev)) {
+ /* switch to raw sensor mode */
+ if (atp_geyser_init(udev))
+ return -EIO;
+
+ printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
+ }
+
+ return 0;
+}
+
static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
{
struct atp *dev;
@@ -633,14 +648,6 @@ static int atp_probe(struct usb_interfac
else
dev->datalen = 81;

- if (!atp_is_fountain(dev)) {
- /* switch to raw sensor mode */
- if (atp_geyser_init(udev))
- goto err_free_devs;
-
- printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
- }
-
dev->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->urb)
goto err_free_devs;
@@ -654,6 +661,10 @@ static int atp_probe(struct usb_interfac
usb_rcvintpipe(udev, int_in_endpointAddr),
dev->data, dev->datalen, atp_complete, dev, 1);

+ error = atp_handle_geyser(dev);
+ if (error)
+ goto err_free_buffer;
+
usb_make_path(udev, dev->phys, sizeof(dev->phys));
strlcat(dev->phys, "/input0", sizeof(dev->phys));

@@ -744,6 +755,20 @@ static void atp_disconnect(struct usb_in
printk(KERN_INFO "input: appletouch disconnected\n");
}

+static int atp_recover(struct atp *dev)
+{
+ int error;
+
+ error = atp_handle_geyser(dev);
+ if (error)
+ return error;
+
+ if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
+ return -EIO;
+
+ return 0;
+}
+
static int atp_suspend(struct usb_interface *iface, pm_message_t message)
{
struct atp *dev = usb_get_intfdata(iface);
@@ -764,12 +789,20 @@ static int atp_resume(struct usb_interfa
return 0;
}

+static int atp_reset_resume(struct usb_interface *iface)
+{
+ struct atp *dev = usb_get_intfdata(iface);
+
+ return atp_recover(dev);
+}
+
static struct usb_driver atp_driver = {
.name = "appletouch",
.probe = atp_probe,
.disconnect = atp_disconnect,
.suspend = atp_suspend,
.resume = atp_resume,
+ .reset_resume = atp_reset_resume,
.id_table = atp_table,
};

--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -47,6 +47,9 @@ static const struct usb_device_id usb_qu
/* Edirol SD-20 */
{ USB_DEVICE(0x0582, 0x0027), .driver_info = USB_QUIRK_RESET_RESUME },

+ /* appletouch */
+ { USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME },
+
/* M-Systems Flash Disk Pioneers */
{ USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },

--