/*
* 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/kernel.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.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);
}
}
