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[ALSA] usb-audio - make SB remote control device LIRC compatible

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USB generic driver
Add ioctls to the Sound Blaster remote control hwdep device so that it
can be used with LIRC.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2005-05-02 08:58:31 +02:00 committed by Jaroslav Kysela
parent ca81090a00
commit 434b7f5687
1 changed files with 37 additions and 2 deletions
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39
sound/usb/usbmixer.c
View file

@ -39,6 +39,18 @@
#include "usbaudio.h"
#if 0
#include <linux/lirc.h>
#else
/* only those symbols from lirc.h we actually need: */
#include <linux/ioctl.h>
#define LIRC_MODE2REC(x) ((x) << 16)
#define LIRC_MODE_CODE 0x00000008
#define LIRC_CAN_REC_CODE LIRC_MODE2REC(LIRC_MODE_CODE)
#define LIRC_GET_FEATURES _IOR('i', 0x00000000, __u32)
#define LIRC_GET_REC_MODE _IOR('i', 0x00000002, __u32)
#define LIRC_SET_REC_MODE _IOW('i', 0x00000012, __u32)
#endif
/*
*/
@ -1739,12 +1751,15 @@ static long snd_usb_sbrc_hwdep_read(snd_hwdep_t *hw, char __user *buf,
int err;
u32 rc_code;
if (count != 1)
if (count != 1 && count != 4)
return -EINVAL;
err = wait_event_interruptible(mixer->rc_waitq,
(rc_code = xchg(&mixer->rc_code, 0)) != 0);
if (err == 0) {
err = put_user(rc_code, buf);
if (count == 1)
err = put_user(rc_code, buf);
else
err = put_user(rc_code, (u32 __user *)buf);
}
return err < 0 ? err : count;
}
@ -1758,6 +1773,25 @@ static unsigned int snd_usb_sbrc_hwdep_poll(snd_hwdep_t *hw, struct file *file,
return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
}
static int snd_usb_sbrc_hwdep_ioctl(snd_hwdep_t *hw, struct file *file,
unsigned int cmd, unsigned long arg)
{
u32 __user *argp = (u32 __user *)arg;
u32 mode;
switch (cmd) {
case LIRC_GET_FEATURES:
return put_user(LIRC_CAN_REC_CODE, argp);
case LIRC_GET_REC_MODE:
return put_user(LIRC_MODE_CODE, argp);
case LIRC_SET_REC_MODE:
if (get_user(mode, argp))
return -EFAULT;
return mode == LIRC_MODE_CODE ? 0 : -ENOSYS;
}
return -ENOTTY;
}
static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
{
snd_hwdep_t *hwdep;
@ -1788,6 +1822,7 @@ static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
hwdep->ops.open = snd_usb_sbrc_hwdep_open;
hwdep->ops.release = snd_usb_sbrc_hwdep_release;
hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
hwdep->ops.ioctl = snd_usb_sbrc_hwdep_ioctl;
mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!mixer->rc_urb)