From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/media/usb/usbtv/usbtv-audio.c | 377 ++++++++++++++++++++++++++++++++++ 1 file changed, 377 insertions(+) create mode 100644 drivers/media/usb/usbtv/usbtv-audio.c (limited to 'drivers/media/usb/usbtv/usbtv-audio.c') diff --git a/drivers/media/usb/usbtv/usbtv-audio.c b/drivers/media/usb/usbtv/usbtv-audio.c new file mode 100644 index 0000000000..333bd305a4 --- /dev/null +++ b/drivers/media/usb/usbtv/usbtv-audio.c @@ -0,0 +1,377 @@ +/* + * Copyright (c) 2013 Federico Simoncelli + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/* + * Fushicai USBTV007 Audio-Video Grabber Driver + * + * Product web site: + * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html + * + * No physical hardware was harmed running Windows during the + * reverse-engineering activity + */ + +#include +#include +#include +#include + +#include "usbtv.h" + +static const struct snd_pcm_hardware snd_usbtv_digital_hw = { + .info = SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .period_bytes_min = 11059, + .period_bytes_max = 13516, + .periods_min = 2, + .periods_max = 98, + .buffer_bytes_max = 62720 * 8, /* value in usbaudio.c */ +}; + +static int snd_usbtv_pcm_open(struct snd_pcm_substream *substream) +{ + struct usbtv *chip = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + + chip->snd_substream = substream; + runtime->hw = snd_usbtv_digital_hw; + + return 0; +} + +static int snd_usbtv_pcm_close(struct snd_pcm_substream *substream) +{ + struct usbtv *chip = snd_pcm_substream_chip(substream); + + if (atomic_read(&chip->snd_stream)) { + atomic_set(&chip->snd_stream, 0); + schedule_work(&chip->snd_trigger); + } + + return 0; +} + +static int snd_usbtv_prepare(struct snd_pcm_substream *substream) +{ + struct usbtv *chip = snd_pcm_substream_chip(substream); + + chip->snd_buffer_pos = 0; + chip->snd_period_pos = 0; + + return 0; +} + +static void usbtv_audio_urb_received(struct urb *urb) +{ + struct usbtv *chip = urb->context; + struct snd_pcm_substream *substream = chip->snd_substream; + struct snd_pcm_runtime *runtime = substream->runtime; + size_t i, frame_bytes, chunk_length, buffer_pos, period_pos; + int period_elapsed; + unsigned long flags; + void *urb_current; + + switch (urb->status) { + case 0: + case -ETIMEDOUT: + break; + case -ENOENT: + case -EPROTO: + case -ECONNRESET: + case -ESHUTDOWN: + return; + default: + dev_warn(chip->dev, "unknown audio urb status %i\n", + urb->status); + } + + if (!atomic_read(&chip->snd_stream)) + return; + + frame_bytes = runtime->frame_bits >> 3; + chunk_length = USBTV_CHUNK / frame_bytes; + + buffer_pos = chip->snd_buffer_pos; + period_pos = chip->snd_period_pos; + period_elapsed = 0; + + for (i = 0; i < urb->actual_length; i += USBTV_CHUNK_SIZE) { + urb_current = urb->transfer_buffer + i + USBTV_AUDIO_HDRSIZE; + + if (buffer_pos + chunk_length >= runtime->buffer_size) { + size_t cnt = (runtime->buffer_size - buffer_pos) * + frame_bytes; + memcpy(runtime->dma_area + buffer_pos * frame_bytes, + urb_current, cnt); + memcpy(runtime->dma_area, urb_current + cnt, + chunk_length * frame_bytes - cnt); + } else { + memcpy(runtime->dma_area + buffer_pos * frame_bytes, + urb_current, chunk_length * frame_bytes); + } + + buffer_pos += chunk_length; + period_pos += chunk_length; + + if (buffer_pos >= runtime->buffer_size) + buffer_pos -= runtime->buffer_size; + + if (period_pos >= runtime->period_size) { + period_pos -= runtime->period_size; + period_elapsed = 1; + } + } + + snd_pcm_stream_lock_irqsave(substream, flags); + + chip->snd_buffer_pos = buffer_pos; + chip->snd_period_pos = period_pos; + + snd_pcm_stream_unlock_irqrestore(substream, flags); + + if (period_elapsed) + snd_pcm_period_elapsed(substream); + + usb_submit_urb(urb, GFP_ATOMIC); +} + +static int usbtv_audio_start(struct usbtv *chip) +{ + unsigned int pipe; + static const u16 setup[][2] = { + /* These seem to enable the device. */ + { USBTV_BASE + 0x0008, 0x0001 }, + { USBTV_BASE + 0x01d0, 0x00ff }, + { USBTV_BASE + 0x01d9, 0x0002 }, + + { USBTV_BASE + 0x01da, 0x0013 }, + { USBTV_BASE + 0x01db, 0x0012 }, + { USBTV_BASE + 0x01e9, 0x0002 }, + { USBTV_BASE + 0x01ec, 0x006c }, + { USBTV_BASE + 0x0294, 0x0020 }, + { USBTV_BASE + 0x0255, 0x00cf }, + { USBTV_BASE + 0x0256, 0x0020 }, + { USBTV_BASE + 0x01eb, 0x0030 }, + { USBTV_BASE + 0x027d, 0x00a6 }, + { USBTV_BASE + 0x0280, 0x0011 }, + { USBTV_BASE + 0x0281, 0x0040 }, + { USBTV_BASE + 0x0282, 0x0011 }, + { USBTV_BASE + 0x0283, 0x0040 }, + { 0xf891, 0x0010 }, + + /* this sets the input from composite */ + { USBTV_BASE + 0x0284, 0x00aa }, + }; + + chip->snd_bulk_urb = usb_alloc_urb(0, GFP_KERNEL); + if (chip->snd_bulk_urb == NULL) + goto err_alloc_urb; + + pipe = usb_rcvbulkpipe(chip->udev, USBTV_AUDIO_ENDP); + + chip->snd_bulk_urb->transfer_buffer = kzalloc( + USBTV_AUDIO_URBSIZE, GFP_KERNEL); + if (chip->snd_bulk_urb->transfer_buffer == NULL) + goto err_transfer_buffer; + + usb_fill_bulk_urb(chip->snd_bulk_urb, chip->udev, pipe, + chip->snd_bulk_urb->transfer_buffer, USBTV_AUDIO_URBSIZE, + usbtv_audio_urb_received, chip); + + /* starting the stream */ + usbtv_set_regs(chip, setup, ARRAY_SIZE(setup)); + + usb_clear_halt(chip->udev, pipe); + usb_submit_urb(chip->snd_bulk_urb, GFP_ATOMIC); + + return 0; + +err_transfer_buffer: + usb_free_urb(chip->snd_bulk_urb); + chip->snd_bulk_urb = NULL; + +err_alloc_urb: + return -ENOMEM; +} + +static int usbtv_audio_stop(struct usbtv *chip) +{ + static const u16 setup[][2] = { + /* The original windows driver sometimes sends also: + * { USBTV_BASE + 0x00a2, 0x0013 } + * but it seems useless and its real effects are untested at + * the moment. + */ + { USBTV_BASE + 0x027d, 0x0000 }, + { USBTV_BASE + 0x0280, 0x0010 }, + { USBTV_BASE + 0x0282, 0x0010 }, + }; + + if (chip->snd_bulk_urb) { + usb_kill_urb(chip->snd_bulk_urb); + kfree(chip->snd_bulk_urb->transfer_buffer); + usb_free_urb(chip->snd_bulk_urb); + chip->snd_bulk_urb = NULL; + } + + usbtv_set_regs(chip, setup, ARRAY_SIZE(setup)); + + return 0; +} + +void usbtv_audio_suspend(struct usbtv *usbtv) +{ + if (atomic_read(&usbtv->snd_stream) && usbtv->snd_bulk_urb) + usb_kill_urb(usbtv->snd_bulk_urb); +} + +void usbtv_audio_resume(struct usbtv *usbtv) +{ + if (atomic_read(&usbtv->snd_stream) && usbtv->snd_bulk_urb) + usb_submit_urb(usbtv->snd_bulk_urb, GFP_ATOMIC); +} + +static void snd_usbtv_trigger(struct work_struct *work) +{ + struct usbtv *chip = container_of(work, struct usbtv, snd_trigger); + + if (!chip->snd) + return; + + if (atomic_read(&chip->snd_stream)) + usbtv_audio_start(chip); + else + usbtv_audio_stop(chip); +} + +static int snd_usbtv_card_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct usbtv *chip = snd_pcm_substream_chip(substream); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + atomic_set(&chip->snd_stream, 1); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + atomic_set(&chip->snd_stream, 0); + break; + default: + return -EINVAL; + } + + schedule_work(&chip->snd_trigger); + + return 0; +} + +static snd_pcm_uframes_t snd_usbtv_pointer(struct snd_pcm_substream *substream) +{ + struct usbtv *chip = snd_pcm_substream_chip(substream); + + return chip->snd_buffer_pos; +} + +static const struct snd_pcm_ops snd_usbtv_pcm_ops = { + .open = snd_usbtv_pcm_open, + .close = snd_usbtv_pcm_close, + .prepare = snd_usbtv_prepare, + .trigger = snd_usbtv_card_trigger, + .pointer = snd_usbtv_pointer, +}; + +int usbtv_audio_init(struct usbtv *usbtv) +{ + int rv; + struct snd_card *card; + struct snd_pcm *pcm; + + INIT_WORK(&usbtv->snd_trigger, snd_usbtv_trigger); + atomic_set(&usbtv->snd_stream, 0); + + rv = snd_card_new(&usbtv->udev->dev, SNDRV_DEFAULT_IDX1, "usbtv", + THIS_MODULE, 0, &card); + if (rv < 0) + return rv; + + strscpy(card->driver, usbtv->dev->driver->name, sizeof(card->driver)); + strscpy(card->shortname, "usbtv", sizeof(card->shortname)); + snprintf(card->longname, sizeof(card->longname), + "USBTV Audio at bus %d device %d", usbtv->udev->bus->busnum, + usbtv->udev->devnum); + + snd_card_set_dev(card, usbtv->dev); + + usbtv->snd = card; + + rv = snd_pcm_new(card, "USBTV Audio", 0, 0, 1, &pcm); + if (rv < 0) + goto err; + + strscpy(pcm->name, "USBTV Audio Input", sizeof(pcm->name)); + pcm->info_flags = 0; + pcm->private_data = usbtv; + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usbtv_pcm_ops); + snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, + NULL, USBTV_AUDIO_BUFFER, USBTV_AUDIO_BUFFER); + + rv = snd_card_register(card); + if (rv) + goto err; + + return 0; + +err: + usbtv->snd = NULL; + snd_card_free(card); + + return rv; +} + +void usbtv_audio_free(struct usbtv *usbtv) +{ + cancel_work_sync(&usbtv->snd_trigger); + + if (usbtv->snd && usbtv->udev) { + snd_card_free_when_closed(usbtv->snd); + usbtv->snd = NULL; + } +} -- cgit v1.2.3