[ALSA] usb-audio - add Extigy/Audigy 2 NX remote control support
ALSA Core,USB generic driver Add an hwdep interface that supports reading remote control data from Sound Blaster Extigy and Audigy 2 NX devices. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
Jaroslav Kysela
parent
6639b6c236
commit
b259b10c42
2 changed files with 161 additions and 1 deletions
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@ -113,9 +113,10 @@ enum sndrv_hwdep_iface {
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SNDRV_HWDEP_IFACE_BLUETOOTH, /* Bluetooth audio */
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SNDRV_HWDEP_IFACE_USX2Y_PCM, /* Tascam US122, US224 & US428 rawusb pcm */
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SNDRV_HWDEP_IFACE_PCXHR, /* Digigram PCXHR */
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SNDRV_HWDEP_IFACE_SB_RC, /* SB Extigy/Audigy2NX remote control */
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/* Don't forget to change the following: */
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SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_PCXHR
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SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_SB_RC
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};
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struct sndrv_hwdep_info {
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@ -35,6 +35,7 @@
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#include <linux/usb.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/hwdep.h>
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#include "usbaudio.h"
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@ -57,6 +58,19 @@ struct usb_mixer_interface {
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unsigned int ignore_ctl_error;
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struct urb *urb;
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usb_mixer_elem_info_t **id_elems; /* array[256], indexed by unit id */
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/* Sound Blaster remote control stuff */
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enum {
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RC_NONE,
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RC_EXTIGY,
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RC_AUDIGY2NX,
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} rc_type;
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unsigned long rc_hwdep_open;
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u32 rc_code;
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wait_queue_head_t rc_waitq;
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struct urb *rc_urb;
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struct usb_ctrlrequest *rc_setup_packet;
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u8 rc_buffer[6];
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};
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@ -1536,6 +1550,9 @@ static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
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kfree(mixer->urb->transfer_buffer);
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usb_free_urb(mixer->urb);
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}
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if (mixer->rc_urb)
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usb_free_urb(mixer->rc_urb);
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kfree(mixer->rc_setup_packet);
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kfree(mixer);
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}
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@ -1604,6 +1621,17 @@ static void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer,
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info->elem_id);
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}
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static void snd_usb_mixer_memory_change(struct usb_mixer_interface *mixer,
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int unitid)
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{
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/* SB remote control */
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if (mixer->rc_type != RC_NONE && unitid == 0) {
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/* read control code from device memory */
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mixer->rc_urb->dev = mixer->chip->dev;
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usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
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}
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}
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static void snd_usb_mixer_status_complete(struct urb *urb, struct pt_regs *regs)
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{
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struct usb_mixer_interface *mixer = urb->context;
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@ -1620,6 +1648,8 @@ static void snd_usb_mixer_status_complete(struct urb *urb, struct pt_regs *regs)
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continue;
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if (!(buf[0] & 0x40))
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snd_usb_mixer_notify_id(mixer, buf[1]);
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else
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snd_usb_mixer_memory_change(mixer, buf[1]);
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}
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}
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if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
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@ -1664,6 +1694,126 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
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return 0;
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}
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static void snd_usb_soundblaster_remote_complete(struct urb *urb,
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struct pt_regs *regs)
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{
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struct usb_mixer_interface *mixer = urb->context;
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/*
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* format of remote control data:
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* Extigy: xx 00
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* Audigy 2 NX: 06 80 xx 00 00 00
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*/
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int offset = mixer->rc_type == RC_EXTIGY ? 0 : 2;
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u32 code;
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if (urb->status < 0 || urb->actual_length <= offset)
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return;
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code = mixer->rc_buffer[offset];
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/* the Mute button actually changes the mixer control */
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if (code == 13)
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snd_usb_mixer_notify_id(mixer, 18);
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mixer->rc_code = code;
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wmb();
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wake_up(&mixer->rc_waitq);
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}
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static int snd_usb_sbrc_hwdep_open(snd_hwdep_t *hw, struct file *file)
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{
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struct usb_mixer_interface *mixer = hw->private_data;
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if (test_and_set_bit(0, &mixer->rc_hwdep_open))
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return -EBUSY;
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return 0;
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}
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static int snd_usb_sbrc_hwdep_release(snd_hwdep_t *hw, struct file *file)
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{
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struct usb_mixer_interface *mixer = hw->private_data;
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clear_bit(0, &mixer->rc_hwdep_open);
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smp_mb__after_clear_bit();
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return 0;
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}
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static long snd_usb_sbrc_hwdep_read(snd_hwdep_t *hw, char __user *buf,
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long count, loff_t *offset)
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{
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struct usb_mixer_interface *mixer = hw->private_data;
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int err;
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u32 rc_code;
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if (count != 1)
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return -EINVAL;
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err = wait_event_interruptible(mixer->rc_waitq,
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(rc_code = xchg(&mixer->rc_code, 0)) != 0);
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if (err == 0) {
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err = put_user(rc_code, buf);
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}
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return err < 0 ? err : count;
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}
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static unsigned int snd_usb_sbrc_hwdep_poll(snd_hwdep_t *hw, struct file *file,
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poll_table *wait)
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{
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struct usb_mixer_interface *mixer = hw->private_data;
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poll_wait(file, &mixer->rc_waitq, wait);
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return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
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}
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static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
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{
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snd_hwdep_t *hwdep;
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int err, len;
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switch (le16_to_cpu(mixer->chip->dev->descriptor.idProduct)) {
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case 0x3000:
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mixer->rc_type = RC_EXTIGY;
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len = 2;
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break;
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case 0x3020:
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mixer->rc_type = RC_AUDIGY2NX;
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len = 6;
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break;
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default:
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return 0;
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}
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init_waitqueue_head(&mixer->rc_waitq);
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err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
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if (err < 0)
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return err;
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snprintf(hwdep->name, sizeof(hwdep->name),
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"%s remote control", mixer->chip->card->shortname);
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hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
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hwdep->private_data = mixer;
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hwdep->ops.read = snd_usb_sbrc_hwdep_read;
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hwdep->ops.open = snd_usb_sbrc_hwdep_open;
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hwdep->ops.release = snd_usb_sbrc_hwdep_release;
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hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
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mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!mixer->rc_urb)
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return -ENOMEM;
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mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
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if (!mixer->rc_setup_packet) {
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usb_free_urb(mixer->rc_urb);
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mixer->rc_urb = NULL;
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return -ENOMEM;
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}
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mixer->rc_setup_packet->bRequestType =
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USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
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mixer->rc_setup_packet->bRequest = GET_MEM;
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mixer->rc_setup_packet->wValue = cpu_to_le16(0);
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mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
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mixer->rc_setup_packet->wLength = cpu_to_le16(len);
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usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
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usb_rcvctrlpipe(mixer->chip->dev, 0),
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(u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
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snd_usb_soundblaster_remote_complete, mixer);
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return 0;
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}
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int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
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{
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static snd_device_ops_t dev_ops = {
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@ -1694,6 +1844,13 @@ int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
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return err;
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}
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if (le16_to_cpu(chip->dev->descriptor.idVendor) == 0x041e) {
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if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0) {
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snd_usb_mixer_free(mixer);
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return err;
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}
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}
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err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
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if (err < 0) {
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snd_usb_mixer_free(mixer);
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@ -1710,4 +1867,6 @@ void snd_usb_mixer_disconnect(struct list_head *p)
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mixer = list_entry(p, struct usb_mixer_interface, list);
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if (mixer->urb)
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usb_kill_urb(mixer->urb);
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if (mixer->rc_urb)
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usb_kill_urb(mixer->rc_urb);
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}
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