diff options
Diffstat (limited to 'drivers/media/usb/cx231xx/cx231xx-audio.c')
| -rw-r--r-- | drivers/media/usb/cx231xx/cx231xx-audio.c | 703 |
1 files changed, 703 insertions, 0 deletions
diff --git a/drivers/media/usb/cx231xx/cx231xx-audio.c b/drivers/media/usb/cx231xx/cx231xx-audio.c new file mode 100644 index 000000000..9c71b3255 --- /dev/null +++ b/drivers/media/usb/cx231xx/cx231xx-audio.c @@ -0,0 +1,703 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Conexant Cx231xx audio extension + * + * Copyright (C) 2008 <srinivasa.deevi at conexant dot com> + * Based on em28xx driver + */ + +#include "cx231xx.h" +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/sound.h> +#include <linux/spinlock.h> +#include <linux/soundcard.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/info.h> +#include <sound/initval.h> +#include <sound/control.h> +#include <media/v4l2-common.h> + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "activates debug info"); + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; + +static int cx231xx_isoc_audio_deinit(struct cx231xx *dev) +{ + int i; + + dev_dbg(dev->dev, "Stopping isoc\n"); + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + if (dev->adev.urb[i]) { + if (!irqs_disabled()) + usb_kill_urb(dev->adev.urb[i]); + else + usb_unlink_urb(dev->adev.urb[i]); + + usb_free_urb(dev->adev.urb[i]); + dev->adev.urb[i] = NULL; + + kfree(dev->adev.transfer_buffer[i]); + dev->adev.transfer_buffer[i] = NULL; + } + } + + return 0; +} + +static int cx231xx_bulk_audio_deinit(struct cx231xx *dev) +{ + int i; + + dev_dbg(dev->dev, "Stopping bulk\n"); + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + if (dev->adev.urb[i]) { + if (!irqs_disabled()) + usb_kill_urb(dev->adev.urb[i]); + else + usb_unlink_urb(dev->adev.urb[i]); + + usb_free_urb(dev->adev.urb[i]); + dev->adev.urb[i] = NULL; + + kfree(dev->adev.transfer_buffer[i]); + dev->adev.transfer_buffer[i] = NULL; + } + } + + return 0; +} + +static void cx231xx_audio_isocirq(struct urb *urb) +{ + struct cx231xx *dev = urb->context; + int i; + unsigned int oldptr; + int period_elapsed = 0; + int status; + unsigned char *cp; + unsigned int stride; + struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + + if (dev->state & DEV_DISCONNECTED) + return; + + switch (urb->status) { + case 0: /* success */ + case -ETIMEDOUT: /* NAK */ + break; + case -ECONNRESET: /* kill */ + case -ENOENT: + case -ESHUTDOWN: + return; + default: /* error */ + dev_dbg(dev->dev, "urb completion error %d.\n", + urb->status); + break; + } + + if (atomic_read(&dev->stream_started) == 0) + return; + + if (dev->adev.capture_pcm_substream) { + substream = dev->adev.capture_pcm_substream; + runtime = substream->runtime; + stride = runtime->frame_bits >> 3; + + for (i = 0; i < urb->number_of_packets; i++) { + unsigned long flags; + int length = urb->iso_frame_desc[i].actual_length / + stride; + cp = (unsigned char *)urb->transfer_buffer + + urb->iso_frame_desc[i].offset; + + if (!length) + continue; + + oldptr = dev->adev.hwptr_done_capture; + if (oldptr + length >= runtime->buffer_size) { + unsigned int cnt; + + cnt = runtime->buffer_size - oldptr; + memcpy(runtime->dma_area + oldptr * stride, cp, + cnt * stride); + memcpy(runtime->dma_area, cp + cnt * stride, + length * stride - cnt * stride); + } else { + memcpy(runtime->dma_area + oldptr * stride, cp, + length * stride); + } + + snd_pcm_stream_lock_irqsave(substream, flags); + + dev->adev.hwptr_done_capture += length; + if (dev->adev.hwptr_done_capture >= + runtime->buffer_size) + dev->adev.hwptr_done_capture -= + runtime->buffer_size; + + dev->adev.capture_transfer_done += length; + if (dev->adev.capture_transfer_done >= + runtime->period_size) { + dev->adev.capture_transfer_done -= + runtime->period_size; + period_elapsed = 1; + } + snd_pcm_stream_unlock_irqrestore(substream, flags); + } + if (period_elapsed) + snd_pcm_period_elapsed(substream); + } + urb->status = 0; + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status < 0) { + dev_err(dev->dev, + "resubmit of audio urb failed (error=%i)\n", + status); + } + return; +} + +static void cx231xx_audio_bulkirq(struct urb *urb) +{ + struct cx231xx *dev = urb->context; + unsigned int oldptr; + int period_elapsed = 0; + int status; + unsigned char *cp; + unsigned int stride; + struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + + if (dev->state & DEV_DISCONNECTED) + return; + + switch (urb->status) { + case 0: /* success */ + case -ETIMEDOUT: /* NAK */ + break; + case -ECONNRESET: /* kill */ + case -ENOENT: + case -ESHUTDOWN: + return; + default: /* error */ + dev_dbg(dev->dev, "urb completion error %d.\n", + urb->status); + break; + } + + if (atomic_read(&dev->stream_started) == 0) + return; + + if (dev->adev.capture_pcm_substream) { + substream = dev->adev.capture_pcm_substream; + runtime = substream->runtime; + stride = runtime->frame_bits >> 3; + + if (1) { + unsigned long flags; + int length = urb->actual_length / + stride; + cp = (unsigned char *)urb->transfer_buffer; + + oldptr = dev->adev.hwptr_done_capture; + if (oldptr + length >= runtime->buffer_size) { + unsigned int cnt; + + cnt = runtime->buffer_size - oldptr; + memcpy(runtime->dma_area + oldptr * stride, cp, + cnt * stride); + memcpy(runtime->dma_area, cp + cnt * stride, + length * stride - cnt * stride); + } else { + memcpy(runtime->dma_area + oldptr * stride, cp, + length * stride); + } + + snd_pcm_stream_lock_irqsave(substream, flags); + + dev->adev.hwptr_done_capture += length; + if (dev->adev.hwptr_done_capture >= + runtime->buffer_size) + dev->adev.hwptr_done_capture -= + runtime->buffer_size; + + dev->adev.capture_transfer_done += length; + if (dev->adev.capture_transfer_done >= + runtime->period_size) { + dev->adev.capture_transfer_done -= + runtime->period_size; + period_elapsed = 1; + } + snd_pcm_stream_unlock_irqrestore(substream, flags); + } + if (period_elapsed) + snd_pcm_period_elapsed(substream); + } + urb->status = 0; + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status < 0) { + dev_err(dev->dev, + "resubmit of audio urb failed (error=%i)\n", + status); + } + return; +} + +static int cx231xx_init_audio_isoc(struct cx231xx *dev) +{ + int i, errCode; + int sb_size; + + dev_dbg(dev->dev, + "%s: Starting ISO AUDIO transfers\n", __func__); + + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + + sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + struct urb *urb; + int j, k; + + dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); + if (!dev->adev.transfer_buffer[i]) + return -ENOMEM; + + memset(dev->adev.transfer_buffer[i], 0x80, sb_size); + urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC); + if (!urb) { + for (j = 0; j < i; j++) { + usb_free_urb(dev->adev.urb[j]); + kfree(dev->adev.transfer_buffer[j]); + } + return -ENOMEM; + } + + urb->dev = dev->udev; + urb->context = dev; + urb->pipe = usb_rcvisocpipe(dev->udev, + dev->adev.end_point_addr); + urb->transfer_flags = URB_ISO_ASAP; + urb->transfer_buffer = dev->adev.transfer_buffer[i]; + urb->interval = 1; + urb->complete = cx231xx_audio_isocirq; + urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS; + urb->transfer_buffer_length = sb_size; + + for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS; + j++, k += dev->adev.max_pkt_size) { + urb->iso_frame_desc[j].offset = k; + urb->iso_frame_desc[j].length = dev->adev.max_pkt_size; + } + dev->adev.urb[i] = urb; + } + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); + if (errCode < 0) { + cx231xx_isoc_audio_deinit(dev); + return errCode; + } + } + + return errCode; +} + +static int cx231xx_init_audio_bulk(struct cx231xx *dev) +{ + int i, errCode; + int sb_size; + + dev_dbg(dev->dev, + "%s: Starting BULK AUDIO transfers\n", __func__); + + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + + sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + struct urb *urb; + int j; + + dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); + if (!dev->adev.transfer_buffer[i]) + return -ENOMEM; + + memset(dev->adev.transfer_buffer[i], 0x80, sb_size); + urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC); + if (!urb) { + for (j = 0; j < i; j++) { + usb_free_urb(dev->adev.urb[j]); + kfree(dev->adev.transfer_buffer[j]); + } + return -ENOMEM; + } + + urb->dev = dev->udev; + urb->context = dev; + urb->pipe = usb_rcvbulkpipe(dev->udev, + dev->adev.end_point_addr); + urb->transfer_flags = 0; + urb->transfer_buffer = dev->adev.transfer_buffer[i]; + urb->complete = cx231xx_audio_bulkirq; + urb->transfer_buffer_length = sb_size; + + dev->adev.urb[i] = urb; + + } + + for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { + errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); + if (errCode < 0) { + cx231xx_bulk_audio_deinit(dev); + return errCode; + } + } + + return errCode; +} + +static const struct snd_pcm_hardware snd_cx231xx_hw_capture = { + .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP_VALID, + + .formats = SNDRV_PCM_FMTBIT_S16_LE, + + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT, + + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ + .period_bytes_min = 64, /* 12544/2, */ + .period_bytes_max = 12544, + .periods_min = 2, + .periods_max = 98, /* 12544, */ +}; + +static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream) +{ + struct cx231xx *dev = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + int ret = 0; + + dev_dbg(dev->dev, + "opening device and trying to acquire exclusive lock\n"); + + if (dev->state & DEV_DISCONNECTED) { + dev_err(dev->dev, + "Can't open. the device was removed.\n"); + return -ENODEV; + } + + /* set alternate setting for audio interface */ + /* 1 - 48000 samples per sec */ + mutex_lock(&dev->lock); + if (dev->USE_ISO) + ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1); + else + ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); + mutex_unlock(&dev->lock); + if (ret < 0) { + dev_err(dev->dev, + "failed to set alternate setting !\n"); + + return ret; + } + + runtime->hw = snd_cx231xx_hw_capture; + + mutex_lock(&dev->lock); + /* inform hardware to start streaming */ + ret = cx231xx_capture_start(dev, 1, Audio); + + dev->adev.users++; + mutex_unlock(&dev->lock); + + snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + dev->adev.capture_pcm_substream = substream; + runtime->private_data = dev; + + return 0; +} + +static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream) +{ + int ret; + struct cx231xx *dev = snd_pcm_substream_chip(substream); + + dev_dbg(dev->dev, "closing device\n"); + + /* inform hardware to stop streaming */ + mutex_lock(&dev->lock); + ret = cx231xx_capture_start(dev, 0, Audio); + + /* set alternate setting for audio interface */ + /* 1 - 48000 samples per sec */ + ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); + if (ret < 0) { + dev_err(dev->dev, + "failed to set alternate setting !\n"); + + mutex_unlock(&dev->lock); + return ret; + } + + dev->adev.users--; + mutex_unlock(&dev->lock); + + if (dev->adev.users == 0 && dev->adev.shutdown == 1) { + dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users); + dev_dbg(dev->dev, "disabling audio stream!\n"); + dev->adev.shutdown = 0; + dev_dbg(dev->dev, "released lock\n"); + if (atomic_read(&dev->stream_started) > 0) { + atomic_set(&dev->stream_started, 0); + schedule_work(&dev->wq_trigger); + } + } + return 0; +} + +static int snd_cx231xx_prepare(struct snd_pcm_substream *substream) +{ + struct cx231xx *dev = snd_pcm_substream_chip(substream); + + dev->adev.hwptr_done_capture = 0; + dev->adev.capture_transfer_done = 0; + + return 0; +} + +static void audio_trigger(struct work_struct *work) +{ + struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger); + + if (atomic_read(&dev->stream_started)) { + dev_dbg(dev->dev, "starting capture"); + if (is_fw_load(dev) == 0) + cx25840_call(dev, core, load_fw); + if (dev->USE_ISO) + cx231xx_init_audio_isoc(dev); + else + cx231xx_init_audio_bulk(dev); + } else { + dev_dbg(dev->dev, "stopping capture"); + cx231xx_isoc_audio_deinit(dev); + } +} + +static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + struct cx231xx *dev = snd_pcm_substream_chip(substream); + int retval = 0; + + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + + spin_lock(&dev->adev.slock); + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + atomic_set(&dev->stream_started, 1); + break; + case SNDRV_PCM_TRIGGER_STOP: + atomic_set(&dev->stream_started, 0); + break; + default: + retval = -EINVAL; + break; + } + spin_unlock(&dev->adev.slock); + + schedule_work(&dev->wq_trigger); + + return retval; +} + +static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream + *substream) +{ + struct cx231xx *dev; + unsigned long flags; + snd_pcm_uframes_t hwptr_done; + + dev = snd_pcm_substream_chip(substream); + + spin_lock_irqsave(&dev->adev.slock, flags); + hwptr_done = dev->adev.hwptr_done_capture; + spin_unlock_irqrestore(&dev->adev.slock, flags); + + return hwptr_done; +} + +static const struct snd_pcm_ops snd_cx231xx_pcm_capture = { + .open = snd_cx231xx_capture_open, + .close = snd_cx231xx_pcm_close, + .prepare = snd_cx231xx_prepare, + .trigger = snd_cx231xx_capture_trigger, + .pointer = snd_cx231xx_capture_pointer, +}; + +static int cx231xx_audio_init(struct cx231xx *dev) +{ + struct cx231xx_audio *adev = &dev->adev; + struct snd_pcm *pcm; + struct snd_card *card; + static int devnr; + int err; + struct usb_interface *uif; + int i, isoc_pipe = 0; + + if (dev->has_alsa_audio != 1) { + /* This device does not support the extension (in this case + the device is expecting the snd-usb-audio module or + doesn't have analog audio support at all) */ + return 0; + } + + dev_dbg(dev->dev, + "probing for cx231xx non standard usbaudio\n"); + + err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio", + THIS_MODULE, 0, &card); + if (err < 0) + return err; + + spin_lock_init(&adev->slock); + err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm); + if (err < 0) + goto err_free_card; + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, + &snd_cx231xx_pcm_capture); + snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); + pcm->info_flags = 0; + pcm->private_data = dev; + strscpy(pcm->name, "Conexant cx231xx Capture", sizeof(pcm->name)); + strscpy(card->driver, "Cx231xx-Audio", sizeof(card->driver)); + strscpy(card->shortname, "Cx231xx Audio", sizeof(card->shortname)); + strscpy(card->longname, "Conexant cx231xx Audio", sizeof(card->longname)); + + INIT_WORK(&dev->wq_trigger, audio_trigger); + + err = snd_card_register(card); + if (err < 0) + goto err_free_card; + + adev->sndcard = card; + adev->udev = dev->udev; + + /* compute alternate max packet sizes for Audio */ + uif = + dev->udev->actconfig->interface[dev->current_pcb_config. + hs_config_info[0].interface_info. + audio_index + 1]; + + if (uif->altsetting[0].desc.bNumEndpoints < isoc_pipe + 1) { + err = -ENODEV; + goto err_free_card; + } + + adev->end_point_addr = + uif->altsetting[0].endpoint[isoc_pipe].desc. + bEndpointAddress; + + adev->num_alt = uif->num_altsetting; + dev_info(dev->dev, + "audio EndPoint Addr 0x%x, Alternate settings: %i\n", + adev->end_point_addr, adev->num_alt); + adev->alt_max_pkt_size = kmalloc_array(32, adev->num_alt, GFP_KERNEL); + if (!adev->alt_max_pkt_size) { + err = -ENOMEM; + goto err_free_card; + } + + for (i = 0; i < adev->num_alt; i++) { + u16 tmp; + + if (uif->altsetting[i].desc.bNumEndpoints < isoc_pipe + 1) { + err = -ENODEV; + goto err_free_pkt_size; + } + + tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc. + wMaxPacketSize); + adev->alt_max_pkt_size[i] = + (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); + dev_dbg(dev->dev, + "audio alternate setting %i, max size= %i\n", i, + adev->alt_max_pkt_size[i]); + } + + return 0; + +err_free_pkt_size: + kfree(adev->alt_max_pkt_size); +err_free_card: + snd_card_free(card); + + return err; +} + +static int cx231xx_audio_fini(struct cx231xx *dev) +{ + if (dev == NULL) + return 0; + + if (dev->has_alsa_audio != 1) { + /* This device does not support the extension (in this case + the device is expecting the snd-usb-audio module or + doesn't have analog audio support at all) */ + return 0; + } + + if (dev->adev.sndcard) { + snd_card_free_when_closed(dev->adev.sndcard); + kfree(dev->adev.alt_max_pkt_size); + dev->adev.sndcard = NULL; + } + + return 0; +} + +static struct cx231xx_ops audio_ops = { + .id = CX231XX_AUDIO, + .name = "Cx231xx Audio Extension", + .init = cx231xx_audio_init, + .fini = cx231xx_audio_fini, +}; + +static int __init cx231xx_alsa_register(void) +{ + return cx231xx_register_extension(&audio_ops); +} + +static void __exit cx231xx_alsa_unregister(void) +{ + cx231xx_unregister_extension(&audio_ops); +} + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>"); +MODULE_DESCRIPTION("Cx231xx Audio driver"); + +module_init(cx231xx_alsa_register); +module_exit(cx231xx_alsa_unregister); |