linux/drivers/usb/storage/onetouch.c
Matthew Dharm 7931e1c6f8 [PATCH] USB Storage: make OneTouch PM-aware
The OneTouch subdriver submits its own interrupt URB for notifications
about button presses.  Consequently it needs to know about suspend and
resume events, so it can cancel or restart the URB.

This patch (as593) adds a hook to struct us_data, to be used for
notifying subdrivers about Power Management events, and it implements
the hook in the OneTouch driver.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Nick Sillik <n.sillik@temple.edu>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-04 13:51:41 -08:00

238 lines
6.2 KiB
C

/*
* Support for the Maxtor OneTouch USB hard drive's button
*
* Current development and maintenance by:
* Copyright (c) 2005 Nick Sillik <n.sillik@temple.edu>
*
* Initial work by:
* Copyright (c) 2003 Erik Thyren <erth7411@student.uu.se>
*
* Based on usbmouse.c (Vojtech Pavlik) and xpad.c (Marko Friedemann)
*
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb_ch9.h>
#include <linux/usb_input.h>
#include "usb.h"
#include "onetouch.h"
#include "debug.h"
void onetouch_release_input(void *onetouch_);
struct usb_onetouch {
char name[128];
char phys[64];
struct input_dev *dev; /* input device interface */
struct usb_device *udev; /* usb device */
struct urb *irq; /* urb for interrupt in report */
unsigned char *data; /* input data */
dma_addr_t data_dma;
unsigned int is_open:1;
};
static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs)
{
struct usb_onetouch *onetouch = urb->context;
signed char *data = onetouch->data;
struct input_dev *dev = onetouch->dev;
int status;
switch (urb->status) {
case 0: /* success */
break;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN:
return;
/* -EPIPE: should clear the halt */
default: /* error */
goto resubmit;
}
input_regs(dev, regs);
input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
input_sync(dev);
resubmit:
status = usb_submit_urb (urb, SLAB_ATOMIC);
if (status)
err ("can't resubmit intr, %s-%s/input0, status %d",
onetouch->udev->bus->bus_name,
onetouch->udev->devpath, status);
}
static int usb_onetouch_open(struct input_dev *dev)
{
struct usb_onetouch *onetouch = dev->private;
onetouch->is_open = 1;
onetouch->irq->dev = onetouch->udev;
if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
err("usb_submit_urb failed");
return -EIO;
}
return 0;
}
static void usb_onetouch_close(struct input_dev *dev)
{
struct usb_onetouch *onetouch = dev->private;
usb_kill_urb(onetouch->irq);
onetouch->is_open = 0;
}
#ifdef CONFIG_PM
static void usb_onetouch_pm_hook(struct us_data *us, int action)
{
struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
if (onetouch->is_open) {
switch (action) {
case US_SUSPEND:
usb_kill_urb(onetouch->irq);
break;
case US_RESUME:
if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0)
err("usb_submit_urb failed");
break;
default:
break;
}
}
}
#endif /* CONFIG_PM */
int onetouch_connect_input(struct us_data *ss)
{
struct usb_device *udev = ss->pusb_dev;
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_onetouch *onetouch;
struct input_dev *input_dev;
int pipe, maxp;
interface = ss->pusb_intf->cur_altsetting;
if (interface->desc.bNumEndpoints != 3)
return -ENODEV;
endpoint = &interface->endpoint[2].desc;
if (!(endpoint->bEndpointAddress & USB_DIR_IN))
return -ENODEV;
if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
!= USB_ENDPOINT_XFER_INT)
return -ENODEV;
pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
input_dev = input_allocate_device();
if (!onetouch || !input_dev)
goto fail1;
onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
SLAB_ATOMIC, &onetouch->data_dma);
if (!onetouch->data)
goto fail1;
onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!onetouch->irq)
goto fail2;
onetouch->udev = udev;
onetouch->dev = input_dev;
if (udev->manufacturer)
strlcpy(onetouch->name, udev->manufacturer,
sizeof(onetouch->name));
if (udev->product) {
if (udev->manufacturer)
strlcat(onetouch->name, " ", sizeof(onetouch->name));
strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
}
if (!strlen(onetouch->name))
snprintf(onetouch->name, sizeof(onetouch->name),
"Maxtor Onetouch %04x:%04x",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
input_dev->name = onetouch->name;
input_dev->phys = onetouch->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->cdev.dev = &udev->dev;
set_bit(EV_KEY, input_dev->evbit);
set_bit(ONETOUCH_BUTTON, input_dev->keybit);
clear_bit(0, input_dev->keybit);
input_dev->private = onetouch;
input_dev->open = usb_onetouch_open;
input_dev->close = usb_onetouch_close;
usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
(maxp > 8 ? 8 : maxp),
usb_onetouch_irq, onetouch, endpoint->bInterval);
onetouch->irq->transfer_dma = onetouch->data_dma;
onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
ss->extra_destructor = onetouch_release_input;
ss->extra = onetouch;
#ifdef CONFIG_PM
ss->suspend_resume_hook = usb_onetouch_pm_hook;
#endif
input_register_device(onetouch->dev);
return 0;
fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
onetouch->data, onetouch->data_dma);
fail1: kfree(onetouch);
input_free_device(input_dev);
return -ENOMEM;
}
void onetouch_release_input(void *onetouch_)
{
struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
if (onetouch) {
usb_kill_urb(onetouch->irq);
input_unregister_device(onetouch->dev);
usb_free_urb(onetouch->irq);
usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
onetouch->data, onetouch->data_dma);
}
}