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linux/drivers/usb/input/xpad.c
Arjan van de Ven 4c4c9432a6 [PATCH] USB: mark various usb tables const 
patch below marks various USB tables and variables as const so that they
end up in .rodata section and don't cacheline share with things that get
written to. For the non-array variables it also allows gcc to optimize
more.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-04 13:51:40 -08:00

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/*
* X-Box gamepad - v0.0.5
*
* Copyright (c) 2002 Marko Friedemann <mfr@bmx-chemnitz.de>
*
*
* 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
*
*
* This driver is based on:
* - information from http://euc.jp/periphs/xbox-controller.ja.html
* - the iForce driver drivers/char/joystick/iforce.c
* - the skeleton-driver drivers/usb/usb-skeleton.c
*
* Thanks to:
* - ITO Takayuki for providing essential xpad information on his website
* - Vojtech Pavlik - iforce driver / input subsystem
* - Greg Kroah-Hartman - usb-skeleton driver
*
* TODO:
* - fine tune axes
* - fix "analog" buttons (reported as digital now)
* - get rumble working
*
* History:
*
* 2002-06-27 - 0.0.1 : first version, just said "XBOX HID controller"
*
* 2002-07-02 - 0.0.2 : basic working version
* - all axes and 9 of the 10 buttons work (german InterAct device)
* - the black button does not work
*
* 2002-07-14 - 0.0.3 : rework by Vojtech Pavlik
* - indentation fixes
* - usb + input init sequence fixes
*
* 2002-07-16 - 0.0.4 : minor changes, merge with Vojtech's v0.0.3
* - verified the lack of HID and report descriptors
* - verified that ALL buttons WORK
* - fixed d-pad to axes mapping
*
* 2002-07-17 - 0.0.5 : simplified d-pad handling
*/
#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/smp_lock.h>
#include <linux/usb.h>
#include <linux/usb_input.h>
#define DRIVER_VERSION "v0.0.5"
#define DRIVER_AUTHOR "Marko Friedemann <mfr@bmx-chemnitz.de>"
#define DRIVER_DESC "X-Box pad driver"
#define XPAD_PKT_LEN 32
static const struct xpad_device {
u16 idVendor;
u16 idProduct;
char *name;
} xpad_device[] = {
{ 0x045e, 0x0202, "Microsoft X-Box pad (US)" },
{ 0x045e, 0x0285, "Microsoft X-Box pad (Japan)" },
{ 0x05fd, 0x107a, "InterAct 'PowerPad Pro' X-Box pad (Germany)" },
{ 0x0000, 0x0000, "X-Box pad" }
};
static const signed short xpad_btn[] = {
BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, /* "analog" buttons */
BTN_START, BTN_BACK, BTN_THUMBL, BTN_THUMBR, /* start/back/sticks */
-1 /* terminating entry */
};
static const signed short xpad_abs[] = {
ABS_X, ABS_Y, /* left stick */
ABS_RX, ABS_RY, /* right stick */
ABS_Z, ABS_RZ, /* triggers left/right */
ABS_HAT0X, ABS_HAT0Y, /* digital pad */
-1 /* terminating entry */
};
static struct usb_device_id xpad_table [] = {
{ USB_INTERFACE_INFO('X', 'B', 0) }, /* X-Box USB-IF not approved class */
{ }
};
MODULE_DEVICE_TABLE (usb, xpad_table);
struct usb_xpad {
struct input_dev *dev; /* input device interface */
struct usb_device *udev; /* usb device */
struct urb *irq_in; /* urb for interrupt in report */
unsigned char *idata; /* input data */
dma_addr_t idata_dma;
char phys[65]; /* physical device path */
};
/*
* xpad_process_packet
*
* Completes a request by converting the data into events for the
* input subsystem.
*
* The used report descriptor was taken from ITO Takayukis website:
* http://euc.jp/periphs/xbox-controller.ja.html
*/
static void xpad_process_packet(struct usb_xpad *xpad, u16 cmd, unsigned char *data, struct pt_regs *regs)
{
struct input_dev *dev = xpad->dev;
input_regs(dev, regs);
/* left stick */
input_report_abs(dev, ABS_X, (__s16) (((__s16)data[13] << 8) | data[12]));
input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[15] << 8) | data[14]));
/* right stick */
input_report_abs(dev, ABS_RX, (__s16) (((__s16)data[17] << 8) | data[16]));
input_report_abs(dev, ABS_RY, (__s16) (((__s16)data[19] << 8) | data[18]));
/* triggers left/right */
input_report_abs(dev, ABS_Z, data[10]);
input_report_abs(dev, ABS_RZ, data[11]);
/* digital pad */
input_report_abs(dev, ABS_HAT0X, !!(data[2] & 0x08) - !!(data[2] & 0x04));
input_report_abs(dev, ABS_HAT0Y, !!(data[2] & 0x02) - !!(data[2] & 0x01));
/* start/back buttons and stick press left/right */
input_report_key(dev, BTN_START, (data[2] & 0x10) >> 4);
input_report_key(dev, BTN_BACK, (data[2] & 0x20) >> 5);
input_report_key(dev, BTN_THUMBL, (data[2] & 0x40) >> 6);
input_report_key(dev, BTN_THUMBR, data[2] >> 7);
/* "analog" buttons A, B, X, Y */
input_report_key(dev, BTN_A, data[4]);
input_report_key(dev, BTN_B, data[5]);
input_report_key(dev, BTN_X, data[6]);
input_report_key(dev, BTN_Y, data[7]);
/* "analog" buttons black, white */
input_report_key(dev, BTN_C, data[8]);
input_report_key(dev, BTN_Z, data[9]);
input_sync(dev);
}
static void xpad_irq_in(struct urb *urb, struct pt_regs *regs)
{
struct usb_xpad *xpad = urb->context;
int retval;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
return;
default:
dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
goto exit;
}
xpad_process_packet(xpad, 0, xpad->idata, regs);
exit:
retval = usb_submit_urb (urb, GFP_ATOMIC);
if (retval)
err ("%s - usb_submit_urb failed with result %d",
__FUNCTION__, retval);
}
static int xpad_open (struct input_dev *dev)
{
struct usb_xpad *xpad = dev->private;
xpad->irq_in->dev = xpad->udev;
if (usb_submit_urb(xpad->irq_in, GFP_KERNEL))
return -EIO;
return 0;
}
static void xpad_close (struct input_dev *dev)
{
struct usb_xpad *xpad = dev->private;
usb_kill_urb(xpad->irq_in);
}
static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev (intf);
struct usb_xpad *xpad;
struct input_dev *input_dev;
struct usb_endpoint_descriptor *ep_irq_in;
int i;
for (i = 0; xpad_device[i].idVendor; i++) {
if ((le16_to_cpu(udev->descriptor.idVendor) == xpad_device[i].idVendor) &&
(le16_to_cpu(udev->descriptor.idProduct) == xpad_device[i].idProduct))
break;
}
xpad = kzalloc(sizeof(struct usb_xpad), GFP_KERNEL);
input_dev = input_allocate_device();
if (!xpad || !input_dev)
goto fail1;
xpad->idata = usb_buffer_alloc(udev, XPAD_PKT_LEN,
SLAB_ATOMIC, &xpad->idata_dma);
if (!xpad->idata)
goto fail1;
xpad->irq_in = usb_alloc_urb(0, GFP_KERNEL);
if (!xpad->irq_in)
goto fail2;
xpad->udev = udev;
xpad->dev = input_dev;
usb_make_path(udev, xpad->phys, sizeof(xpad->phys));
strlcat(xpad->phys, "/input0", sizeof(xpad->phys));
input_dev->name = xpad_device[i].name;
input_dev->phys = xpad->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->cdev.dev = &intf->dev;
input_dev->private = xpad;
input_dev->open = xpad_open;
input_dev->close = xpad_close;
input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
for (i = 0; xpad_btn[i] >= 0; i++)
set_bit(xpad_btn[i], input_dev->keybit);
for (i = 0; xpad_abs[i] >= 0; i++) {
signed short t = xpad_abs[i];
set_bit(t, input_dev->absbit);
switch (t) {
case ABS_X:
case ABS_Y:
case ABS_RX:
case ABS_RY: /* the two sticks */
input_set_abs_params(input_dev, t, -32768, 32767, 16, 128);
break;
case ABS_Z:
case ABS_RZ: /* the triggers */
input_set_abs_params(input_dev, t, 0, 255, 0, 0);
break;
case ABS_HAT0X:
case ABS_HAT0Y: /* the d-pad */
input_set_abs_params(input_dev, t, -1, 1, 0, 0);
break;
}
}
ep_irq_in = &intf->cur_altsetting->endpoint[0].desc;
usb_fill_int_urb(xpad->irq_in, udev,
usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress),
xpad->idata, XPAD_PKT_LEN, xpad_irq_in,
xpad, ep_irq_in->bInterval);
xpad->irq_in->transfer_dma = xpad->idata_dma;
xpad->irq_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
input_register_device(xpad->dev);
usb_set_intfdata(intf, xpad);
return 0;
fail2: usb_buffer_free(udev, XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
fail1: input_free_device(input_dev);
kfree(xpad);
return -ENOMEM;
}
static void xpad_disconnect(struct usb_interface *intf)
{
struct usb_xpad *xpad = usb_get_intfdata (intf);
usb_set_intfdata(intf, NULL);
if (xpad) {
usb_kill_urb(xpad->irq_in);
input_unregister_device(xpad->dev);
usb_free_urb(xpad->irq_in);
usb_buffer_free(interface_to_usbdev(intf), XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
kfree(xpad);
}
}
static struct usb_driver xpad_driver = {
.name = "xpad",
.probe = xpad_probe,
.disconnect = xpad_disconnect,
.id_table = xpad_table,
};
static int __init usb_xpad_init(void)
{
int result = usb_register(&xpad_driver);
if (result == 0)
info(DRIVER_DESC ":" DRIVER_VERSION);
return result;
}
static void __exit usb_xpad_exit(void)
{
usb_deregister(&xpad_driver);
}
module_init(usb_xpad_init);
module_exit(usb_xpad_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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