WebSVN - shark - Rev 846 - /shark/branches/xen/drivers/usb/input/usbkbd.c

/*
* $Id: usbkbd.c,v 1.1 2004-09-13 15:04:47 giacomo Exp $
*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* USB HIDBP Keyboard support
*/

/*
* 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
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/usb.h>

/*
* Version Information
*/
#define DRIVER_VERSION ""
#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
#define DRIVER_DESC "USB HID Boot Protocol keyboard driver"
#define DRIVER_LICENSE "GPL"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);

static unsigned char usb_kbd_keycode[256] = {
0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
27, 43, 84, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
72, 73, 82, 83, 86,127,116,117, 85, 89, 90, 91, 92, 93, 94, 95,
120,121,122,123,134,138,130,132,128,129,131,137,133,135,136,113,
115,114, 0, 0, 0,124, 0,181,182,183,184,185,186,187,188,189,
190,191,192,193,194,195,196,197,198, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
150,158,159,128,136,177,178,176,142,152,173,140
};

struct usb_kbd {
struct input_dev dev;
struct usb_device *usbdev;
unsigned char old[8];
struct urb *irq, *led;
unsigned char newleds;
char name[128];
char phys[64];
int open;

unsigned char *new;
struct usb_ctrlrequest *cr;
unsigned char *leds;
dma_addr_t cr_dma;
dma_addr_t new_dma;
dma_addr_t leds_dma;
};

static void usb_kbd_irq(struct urb *urb, struct pt_regs *regs)
{
struct usb_kbd *kbd = urb->context;
int i;

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(&kbd->dev, regs);

for (i = 0; i < 8; i++)
input_report_key(&kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);

for (i = 2; i < 8; i++) {

if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
if (usb_kbd_keycode[kbd->old[i]])
input_report_key(&kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
else
info("Unknown key (scancode %#x) released.", kbd->old[i]);
}

if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
if (usb_kbd_keycode[kbd->new[i]])
input_report_key(&kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
else
info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
}
}

input_sync(&kbd->dev);

memcpy(kbd->old, kbd->new, 8);

resubmit:
i = usb_submit_urb (urb, SLAB_ATOMIC);
if (i)
err ("can't resubmit intr, %s-%s/input0, status %d",
kbd->usbdev->bus->bus_name,
kbd->usbdev->devpath, i);
}

int usb_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct usb_kbd *kbd = dev->private;

if (type != EV_LED)
return -1;

kbd->newleds = (!!test_bit(LED_KANA, dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
(!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL, dev->led) << 1) |
(!!test_bit(LED_NUML, dev->led));

if (kbd->led->status == -EINPROGRESS)
return 0;

if (*(kbd->leds) == kbd->newleds)
return 0;

*(kbd->leds) = kbd->newleds;
kbd->led->dev = kbd->usbdev;
if (usb_submit_urb(kbd->led, GFP_ATOMIC))
err("usb_submit_urb(leds) failed");

return 0;
}

static void usb_kbd_led(struct urb *urb, struct pt_regs *regs)
{
struct usb_kbd *kbd = urb->context;

if (urb->status)
warn("led urb status %d received", urb->status);

if (*(kbd->leds) == kbd->newleds)
return;

*(kbd->leds) = kbd->newleds;
kbd->led->dev = kbd->usbdev;
if (usb_submit_urb(kbd->led, GFP_ATOMIC))
err("usb_submit_urb(leds) failed");
}

static int usb_kbd_open(struct input_dev *dev)
{
struct usb_kbd *kbd = dev->private;

if (kbd->open++)
return 0;

kbd->irq->dev = kbd->usbdev;
if (usb_submit_urb(kbd->irq, GFP_KERNEL)) {
kbd->open--;
return -EIO;
}

return 0;
}

static void usb_kbd_close(struct input_dev *dev)
{
struct usb_kbd *kbd = dev->private;

if (!--kbd->open)
usb_unlink_urb(kbd->irq);
}

static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
return -1;
if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
return -1;
if (!(kbd->new = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kbd->new_dma)))
return -1;
if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), SLAB_ATOMIC, &kbd->cr_dma)))
return -1;
if (!(kbd->leds = usb_buffer_alloc(dev, 1, SLAB_ATOMIC, &kbd->leds_dma)))
return -1;

return 0;
}

static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
if (kbd->irq)
usb_free_urb(kbd->irq);
if (kbd->led)
usb_free_urb(kbd->led);
if (kbd->new)
usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
if (kbd->cr)
usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
if (kbd->leds)
usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
}

static int usb_kbd_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
struct usb_device * dev = interface_to_usbdev(iface);
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_kbd *kbd;
int i, pipe, maxp;
char path[64];
char *buf;

interface = &iface->altsetting[iface->act_altsetting];

if (interface->desc.bNumEndpoints != 1)
return -ENODEV;

endpoint = &interface->endpoint[0].desc;
if (!(endpoint->bEndpointAddress & 0x80))
return -ENODEV;
if ((endpoint->bmAttributes & 3) != 3)
return -ENODEV;

pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL)))
return -ENOMEM;
memset(kbd, 0, sizeof(struct usb_kbd));

if (usb_kbd_alloc_mem(dev, kbd)) {
usb_kbd_free_mem(dev, kbd);
kfree(kbd);
return -ENOMEM;
}

kbd->usbdev = dev;

kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);

for (i = 0; i < 255; i++)
set_bit(usb_kbd_keycode[i], kbd->dev.keybit);
clear_bit(0, kbd->dev.keybit);

kbd->dev.private = kbd;
kbd->dev.event = usb_kbd_event;
kbd->dev.open = usb_kbd_open;
kbd->dev.close = usb_kbd_close;

usb_fill_int_urb(kbd->irq, dev, pipe,
kbd->new, (maxp > 8 ? 8 : maxp),
usb_kbd_irq, kbd, endpoint->bInterval);
kbd->irq->transfer_dma = kbd->new_dma;
kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
kbd->cr->bRequest = 0x09;
kbd->cr->wValue = cpu_to_le16(0x200);
kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
kbd->cr->wLength = cpu_to_le16(1);

usb_make_path(dev, path, 64);
sprintf26(kbd->phys, "%s/input0", path);

kbd->dev.name = kbd->name;
kbd->dev.phys = kbd->phys;
kbd->dev.id.bustype = BUS_USB;
kbd->dev.id.vendor = dev->descriptor.idVendor;
kbd->dev.id.product = dev->descriptor.idProduct;
kbd->dev.id.version = dev->descriptor.bcdDevice;

if (!(buf = kmalloc(63, GFP_KERNEL))) {
usb_free_urb(kbd->irq);
usb_kbd_free_mem(dev, kbd);
kfree(kbd);
return -ENOMEM;
}

if (dev->descriptor.iManufacturer &&
usb_string(dev, dev->descriptor.iManufacturer, buf, 63) > 0)
strcat(kbd->name, buf);
if (dev->descriptor.iProduct &&
usb_string(dev, dev->descriptor.iProduct, buf, 63) > 0)
sprintf26(kbd->name, "%s %s", kbd->name, buf);

if (!strlen(kbd->name))
sprintf26(kbd->name, "USB HIDBP Keyboard %04x:%04x",
kbd->dev.id.vendor, kbd->dev.id.product);

kfree(buf);

usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
(void *) kbd->cr, kbd->leds, 1,
usb_kbd_led, kbd);
kbd->led->setup_dma = kbd->cr_dma;
kbd->led->transfer_dma = kbd->leds_dma;
kbd->led->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP
| URB_NO_SETUP_DMA_MAP);

input_register_device(&kbd->dev);

printk(KERN_INFO "input: %s on %s\n", kbd->name, path);

usb_set_intfdata(iface, kbd);
return 0;
}

static void usb_kbd_disconnect(struct usb_interface *intf)
{
struct usb_kbd *kbd = usb_get_intfdata (intf);

usb_set_intfdata(intf, NULL);
if (kbd) {
usb_unlink_urb(kbd->irq);
input_unregister_device(&kbd->dev);
usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
kfree(kbd);
}
}

static struct usb_device_id usb_kbd_id_table [] = {
{ USB_INTERFACE_INFO(3, 1, 1) },
{ } /* Terminating entry */
};

MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);

static struct usb_driver usb_kbd_driver = {
.owner = THIS_MODULE,
.name = "usbkbd",
.probe = usb_kbd_probe,
.disconnect = usb_kbd_disconnect,
.id_table = usb_kbd_id_table,
};

/*static*/ int /*__init*/ usb_kbd_init(void)
{
int result = usb_register(&usb_kbd_driver);
if (result == 0)
info(DRIVER_VERSION ":" DRIVER_DESC);
return result;
}

/*static*/ void /*__exit*/ usb_kbd_exit(void)
{
usb_deregister(&usb_kbd_driver);
}

module_init(usb_kbd_init);
module_exit(usb_kbd_exit);

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(root)/shark/branches/xen/drivers/usb/input/usbkbd.c - Rev 846