diff options
Diffstat (limited to 'sound/usb/usbmixer.c')
| -rw-r--r-- | sound/usb/usbmixer.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c index dd045ea6fb01..7ea42d43d7ff 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); } |