Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 434b7f56 authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela
Browse files

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



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

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
parent ca81090a

sound/usb/usbmixer.c

+37 −2
Original line number Diff line number Diff line
@@ -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) {

		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)