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-rw-r--r--include/sound/asound.h3
-rw-r--r--sound/usb/usbmixer.c159
2 files changed, 161 insertions, 1 deletions
diff --git a/include/sound/asound.h b/include/sound/asound.h
index 26db585a181..4321e92a7f8 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -113,9 +113,10 @@ enum sndrv_hwdep_iface {
SNDRV_HWDEP_IFACE_BLUETOOTH, /* Bluetooth audio */
SNDRV_HWDEP_IFACE_USX2Y_PCM, /* Tascam US122, US224 & US428 rawusb pcm */
SNDRV_HWDEP_IFACE_PCXHR, /* Digigram PCXHR */
+ SNDRV_HWDEP_IFACE_SB_RC, /* SB Extigy/Audigy2NX remote control */
/* Don't forget to change the following: */
- SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_PCXHR
+ SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_SB_RC
};
struct sndrv_hwdep_info {
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
index dd045ea6fb0..7ea42d43d7f 100644
--- a/sound/usb/usbmixer.c
+++ b/sound/usb/usbmixer.c
@@ -35,6 +35,7 @@
#include <linux/usb.h>
#include <sound/core.h>
#include <sound/control.h>
+#include <sound/hwdep.h>
#include "usbaudio.h"
@@ -57,6 +58,19 @@ struct usb_mixer_interface {
unsigned int ignore_ctl_error;
struct urb *urb;
usb_mixer_elem_info_t **id_elems; /* array[256], indexed by unit id */
+
+ /* Sound Blaster remote control stuff */
+ enum {
+ RC_NONE,
+ RC_EXTIGY,
+ RC_AUDIGY2NX,
+ } rc_type;
+ unsigned long rc_hwdep_open;
+ u32 rc_code;
+ wait_queue_head_t rc_waitq;
+ struct urb *rc_urb;
+ struct usb_ctrlrequest *rc_setup_packet;
+ u8 rc_buffer[6];
};
@@ -1536,6 +1550,9 @@ static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
kfree(mixer->urb->transfer_buffer);
usb_free_urb(mixer->urb);
}
+ if (mixer->rc_urb)
+ usb_free_urb(mixer->rc_urb);
+ kfree(mixer->rc_setup_packet);
kfree(mixer);
}
@@ -1604,6 +1621,17 @@ static void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer,
info->elem_id);
}
+static void snd_usb_mixer_memory_change(struct usb_mixer_interface *mixer,
+ int unitid)
+{
+ /* SB remote control */
+ if (mixer->rc_type != RC_NONE && unitid == 0) {
+ /* read control code from device memory */
+ mixer->rc_urb->dev = mixer->chip->dev;
+ usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
+ }
+}
+
static void snd_usb_mixer_status_complete(struct urb *urb, struct pt_regs *regs)
{
struct usb_mixer_interface *mixer = urb->context;
@@ -1620,6 +1648,8 @@ static void snd_usb_mixer_status_complete(struct urb *urb, struct pt_regs *regs)
continue;
if (!(buf[0] & 0x40))
snd_usb_mixer_notify_id(mixer, buf[1]);
+ else
+ snd_usb_mixer_memory_change(mixer, buf[1]);
}
}
if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
@@ -1664,6 +1694,126 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
return 0;
}
+static void snd_usb_soundblaster_remote_complete(struct urb *urb,
+ struct pt_regs *regs)
+{
+ struct usb_mixer_interface *mixer = urb->context;
+ /*
+ * format of remote control data:
+ * Extigy: xx 00
+ * Audigy 2 NX: 06 80 xx 00 00 00
+ */
+ int offset = mixer->rc_type == RC_EXTIGY ? 0 : 2;
+ u32 code;
+
+ if (urb->status < 0 || urb->actual_length <= offset)
+ return;
+ code = mixer->rc_buffer[offset];
+ /* the Mute button actually changes the mixer control */
+ if (code == 13)
+ snd_usb_mixer_notify_id(mixer, 18);
+ mixer->rc_code = code;
+ wmb();
+ wake_up(&mixer->rc_waitq);
+}
+
+static int snd_usb_sbrc_hwdep_open(snd_hwdep_t *hw, struct file *file)
+{
+ struct usb_mixer_interface *mixer = hw->private_data;
+
+ if (test_and_set_bit(0, &mixer->rc_hwdep_open))
+ return -EBUSY;
+ return 0;
+}
+
+static int snd_usb_sbrc_hwdep_release(snd_hwdep_t *hw, struct file *file)
+{
+ struct usb_mixer_interface *mixer = hw->private_data;
+
+ clear_bit(0, &mixer->rc_hwdep_open);
+ smp_mb__after_clear_bit();
+ return 0;
+}
+
+static long snd_usb_sbrc_hwdep_read(snd_hwdep_t *hw, char __user *buf,
+ long count, loff_t *offset)
+{
+ struct usb_mixer_interface *mixer = hw->private_data;
+ int err;
+ u32 rc_code;
+
+ if (count != 1)
+ 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);
+ }
+ return err < 0 ? err : count;
+}
+
+static unsigned int snd_usb_sbrc_hwdep_poll(snd_hwdep_t *hw, struct file *file,
+ poll_table *wait)
+{
+ struct usb_mixer_interface *mixer = hw->private_data;
+
+ poll_wait(file, &mixer->rc_waitq, wait);
+ return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
+}
+
+static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
+{
+ snd_hwdep_t *hwdep;
+ int err, len;
+
+ switch (le16_to_cpu(mixer->chip->dev->descriptor.idProduct)) {
+ case 0x3000:
+ mixer->rc_type = RC_EXTIGY;
+ len = 2;
+ break;
+ case 0x3020:
+ mixer->rc_type = RC_AUDIGY2NX;
+ len = 6;
+ break;
+ default:
+ return 0;
+ }
+
+ init_waitqueue_head(&mixer->rc_waitq);
+ err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
+ if (err < 0)
+ return err;
+ snprintf(hwdep->name, sizeof(hwdep->name),
+ "%s remote control", mixer->chip->card->shortname);
+ hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
+ hwdep->private_data = mixer;
+ hwdep->ops.read = snd_usb_sbrc_hwdep_read;
+ hwdep->ops.open = snd_usb_sbrc_hwdep_open;
+ hwdep->ops.release = snd_usb_sbrc_hwdep_release;
+ hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
+
+ mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!mixer->rc_urb)
+ return -ENOMEM;
+ mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
+ if (!mixer->rc_setup_packet) {
+ usb_free_urb(mixer->rc_urb);
+ mixer->rc_urb = NULL;
+ return -ENOMEM;
+ }
+ mixer->rc_setup_packet->bRequestType =
+ USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
+ mixer->rc_setup_packet->bRequest = GET_MEM;
+ mixer->rc_setup_packet->wValue = cpu_to_le16(0);
+ mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
+ mixer->rc_setup_packet->wLength = cpu_to_le16(len);
+ usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
+ usb_rcvctrlpipe(mixer->chip->dev, 0),
+ (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
+ snd_usb_soundblaster_remote_complete, mixer);
+ return 0;
+}
+
int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
{
static snd_device_ops_t dev_ops = {
@@ -1694,6 +1844,13 @@ int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
return err;
}
+ if (le16_to_cpu(chip->dev->descriptor.idVendor) == 0x041e) {
+ if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0) {
+ snd_usb_mixer_free(mixer);
+ return err;
+ }
+ }
+
err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
if (err < 0) {
snd_usb_mixer_free(mixer);
@@ -1710,4 +1867,6 @@ void snd_usb_mixer_disconnect(struct list_head *p)
mixer = list_entry(p, struct usb_mixer_interface, list);
if (mixer->urb)
usb_kill_urb(mixer->urb);
+ if (mixer->rc_urb)
+ usb_kill_urb(mixer->rc_urb);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 08:42:26 +0000