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703 lines
17 KiB
703 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Conexant Cx231xx audio extension |
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* |
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* Copyright (C) 2008 <srinivasa.deevi at conexant dot com> |
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* Based on em28xx driver |
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*/ |
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#include "cx231xx.h" |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/sound.h> |
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#include <linux/spinlock.h> |
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#include <linux/soundcard.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/info.h> |
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#include <sound/initval.h> |
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#include <sound/control.h> |
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#include <media/v4l2-common.h> |
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static int debug; |
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module_param(debug, int, 0644); |
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MODULE_PARM_DESC(debug, "activates debug info"); |
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; |
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static int cx231xx_isoc_audio_deinit(struct cx231xx *dev) |
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{ |
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int i; |
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dev_dbg(dev->dev, "Stopping isoc\n"); |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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if (dev->adev.urb[i]) { |
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if (!irqs_disabled()) |
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usb_kill_urb(dev->adev.urb[i]); |
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else |
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usb_unlink_urb(dev->adev.urb[i]); |
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usb_free_urb(dev->adev.urb[i]); |
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dev->adev.urb[i] = NULL; |
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kfree(dev->adev.transfer_buffer[i]); |
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dev->adev.transfer_buffer[i] = NULL; |
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} |
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} |
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return 0; |
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} |
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static int cx231xx_bulk_audio_deinit(struct cx231xx *dev) |
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{ |
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int i; |
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dev_dbg(dev->dev, "Stopping bulk\n"); |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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if (dev->adev.urb[i]) { |
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if (!irqs_disabled()) |
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usb_kill_urb(dev->adev.urb[i]); |
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else |
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usb_unlink_urb(dev->adev.urb[i]); |
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usb_free_urb(dev->adev.urb[i]); |
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dev->adev.urb[i] = NULL; |
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kfree(dev->adev.transfer_buffer[i]); |
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dev->adev.transfer_buffer[i] = NULL; |
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} |
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} |
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return 0; |
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} |
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static void cx231xx_audio_isocirq(struct urb *urb) |
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{ |
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struct cx231xx *dev = urb->context; |
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int i; |
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unsigned int oldptr; |
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int period_elapsed = 0; |
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int status; |
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unsigned char *cp; |
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unsigned int stride; |
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struct snd_pcm_substream *substream; |
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struct snd_pcm_runtime *runtime; |
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if (dev->state & DEV_DISCONNECTED) |
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return; |
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switch (urb->status) { |
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case 0: /* success */ |
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case -ETIMEDOUT: /* NAK */ |
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break; |
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case -ECONNRESET: /* kill */ |
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case -ENOENT: |
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case -ESHUTDOWN: |
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return; |
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default: /* error */ |
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dev_dbg(dev->dev, "urb completion error %d.\n", |
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urb->status); |
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break; |
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} |
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if (atomic_read(&dev->stream_started) == 0) |
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return; |
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if (dev->adev.capture_pcm_substream) { |
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substream = dev->adev.capture_pcm_substream; |
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runtime = substream->runtime; |
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stride = runtime->frame_bits >> 3; |
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for (i = 0; i < urb->number_of_packets; i++) { |
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unsigned long flags; |
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int length = urb->iso_frame_desc[i].actual_length / |
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stride; |
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cp = (unsigned char *)urb->transfer_buffer + |
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urb->iso_frame_desc[i].offset; |
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if (!length) |
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continue; |
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oldptr = dev->adev.hwptr_done_capture; |
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if (oldptr + length >= runtime->buffer_size) { |
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unsigned int cnt; |
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cnt = runtime->buffer_size - oldptr; |
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memcpy(runtime->dma_area + oldptr * stride, cp, |
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cnt * stride); |
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memcpy(runtime->dma_area, cp + cnt * stride, |
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length * stride - cnt * stride); |
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} else { |
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memcpy(runtime->dma_area + oldptr * stride, cp, |
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length * stride); |
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} |
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snd_pcm_stream_lock_irqsave(substream, flags); |
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dev->adev.hwptr_done_capture += length; |
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if (dev->adev.hwptr_done_capture >= |
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runtime->buffer_size) |
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dev->adev.hwptr_done_capture -= |
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runtime->buffer_size; |
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dev->adev.capture_transfer_done += length; |
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if (dev->adev.capture_transfer_done >= |
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runtime->period_size) { |
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dev->adev.capture_transfer_done -= |
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runtime->period_size; |
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period_elapsed = 1; |
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} |
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snd_pcm_stream_unlock_irqrestore(substream, flags); |
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} |
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if (period_elapsed) |
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snd_pcm_period_elapsed(substream); |
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} |
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urb->status = 0; |
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status = usb_submit_urb(urb, GFP_ATOMIC); |
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if (status < 0) { |
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dev_err(dev->dev, |
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"resubmit of audio urb failed (error=%i)\n", |
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status); |
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} |
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return; |
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} |
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static void cx231xx_audio_bulkirq(struct urb *urb) |
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{ |
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struct cx231xx *dev = urb->context; |
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unsigned int oldptr; |
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int period_elapsed = 0; |
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int status; |
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unsigned char *cp; |
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unsigned int stride; |
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struct snd_pcm_substream *substream; |
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struct snd_pcm_runtime *runtime; |
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if (dev->state & DEV_DISCONNECTED) |
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return; |
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switch (urb->status) { |
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case 0: /* success */ |
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case -ETIMEDOUT: /* NAK */ |
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break; |
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case -ECONNRESET: /* kill */ |
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case -ENOENT: |
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case -ESHUTDOWN: |
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return; |
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default: /* error */ |
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dev_dbg(dev->dev, "urb completion error %d.\n", |
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urb->status); |
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break; |
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} |
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if (atomic_read(&dev->stream_started) == 0) |
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return; |
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if (dev->adev.capture_pcm_substream) { |
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substream = dev->adev.capture_pcm_substream; |
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runtime = substream->runtime; |
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stride = runtime->frame_bits >> 3; |
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if (1) { |
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unsigned long flags; |
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int length = urb->actual_length / |
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stride; |
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cp = (unsigned char *)urb->transfer_buffer; |
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oldptr = dev->adev.hwptr_done_capture; |
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if (oldptr + length >= runtime->buffer_size) { |
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unsigned int cnt; |
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cnt = runtime->buffer_size - oldptr; |
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memcpy(runtime->dma_area + oldptr * stride, cp, |
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cnt * stride); |
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memcpy(runtime->dma_area, cp + cnt * stride, |
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length * stride - cnt * stride); |
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} else { |
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memcpy(runtime->dma_area + oldptr * stride, cp, |
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length * stride); |
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} |
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snd_pcm_stream_lock_irqsave(substream, flags); |
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dev->adev.hwptr_done_capture += length; |
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if (dev->adev.hwptr_done_capture >= |
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runtime->buffer_size) |
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dev->adev.hwptr_done_capture -= |
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runtime->buffer_size; |
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dev->adev.capture_transfer_done += length; |
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if (dev->adev.capture_transfer_done >= |
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runtime->period_size) { |
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dev->adev.capture_transfer_done -= |
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runtime->period_size; |
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period_elapsed = 1; |
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} |
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snd_pcm_stream_unlock_irqrestore(substream, flags); |
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} |
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if (period_elapsed) |
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snd_pcm_period_elapsed(substream); |
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} |
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urb->status = 0; |
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status = usb_submit_urb(urb, GFP_ATOMIC); |
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if (status < 0) { |
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dev_err(dev->dev, |
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"resubmit of audio urb failed (error=%i)\n", |
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status); |
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} |
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return; |
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} |
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static int cx231xx_init_audio_isoc(struct cx231xx *dev) |
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{ |
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int i, errCode; |
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int sb_size; |
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dev_dbg(dev->dev, |
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"%s: Starting ISO AUDIO transfers\n", __func__); |
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if (dev->state & DEV_DISCONNECTED) |
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return -ENODEV; |
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sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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struct urb *urb; |
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int j, k; |
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dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); |
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if (!dev->adev.transfer_buffer[i]) |
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return -ENOMEM; |
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memset(dev->adev.transfer_buffer[i], 0x80, sb_size); |
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urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC); |
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if (!urb) { |
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for (j = 0; j < i; j++) { |
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usb_free_urb(dev->adev.urb[j]); |
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kfree(dev->adev.transfer_buffer[j]); |
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} |
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return -ENOMEM; |
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} |
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urb->dev = dev->udev; |
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urb->context = dev; |
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urb->pipe = usb_rcvisocpipe(dev->udev, |
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dev->adev.end_point_addr); |
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urb->transfer_flags = URB_ISO_ASAP; |
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urb->transfer_buffer = dev->adev.transfer_buffer[i]; |
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urb->interval = 1; |
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urb->complete = cx231xx_audio_isocirq; |
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urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS; |
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urb->transfer_buffer_length = sb_size; |
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for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS; |
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j++, k += dev->adev.max_pkt_size) { |
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urb->iso_frame_desc[j].offset = k; |
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urb->iso_frame_desc[j].length = dev->adev.max_pkt_size; |
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} |
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dev->adev.urb[i] = urb; |
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} |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); |
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if (errCode < 0) { |
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cx231xx_isoc_audio_deinit(dev); |
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return errCode; |
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} |
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} |
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return errCode; |
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} |
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static int cx231xx_init_audio_bulk(struct cx231xx *dev) |
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{ |
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int i, errCode; |
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int sb_size; |
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dev_dbg(dev->dev, |
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"%s: Starting BULK AUDIO transfers\n", __func__); |
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if (dev->state & DEV_DISCONNECTED) |
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return -ENODEV; |
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sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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struct urb *urb; |
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int j; |
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dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); |
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if (!dev->adev.transfer_buffer[i]) |
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return -ENOMEM; |
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memset(dev->adev.transfer_buffer[i], 0x80, sb_size); |
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urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC); |
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if (!urb) { |
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for (j = 0; j < i; j++) { |
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usb_free_urb(dev->adev.urb[j]); |
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kfree(dev->adev.transfer_buffer[j]); |
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} |
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return -ENOMEM; |
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} |
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urb->dev = dev->udev; |
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urb->context = dev; |
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urb->pipe = usb_rcvbulkpipe(dev->udev, |
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dev->adev.end_point_addr); |
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urb->transfer_flags = 0; |
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urb->transfer_buffer = dev->adev.transfer_buffer[i]; |
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urb->complete = cx231xx_audio_bulkirq; |
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urb->transfer_buffer_length = sb_size; |
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dev->adev.urb[i] = urb; |
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} |
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
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errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); |
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if (errCode < 0) { |
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cx231xx_bulk_audio_deinit(dev); |
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return errCode; |
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} |
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} |
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return errCode; |
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} |
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static const struct snd_pcm_hardware snd_cx231xx_hw_capture = { |
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.info = SNDRV_PCM_INFO_BLOCK_TRANSFER | |
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SNDRV_PCM_INFO_MMAP | |
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SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_MMAP_VALID, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT, |
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.rate_min = 48000, |
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.rate_max = 48000, |
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.channels_min = 2, |
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.channels_max = 2, |
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.buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ |
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.period_bytes_min = 64, /* 12544/2, */ |
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.period_bytes_max = 12544, |
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.periods_min = 2, |
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.periods_max = 98, /* 12544, */ |
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}; |
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static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream) |
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{ |
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struct cx231xx *dev = snd_pcm_substream_chip(substream); |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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int ret = 0; |
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dev_dbg(dev->dev, |
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"opening device and trying to acquire exclusive lock\n"); |
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if (dev->state & DEV_DISCONNECTED) { |
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dev_err(dev->dev, |
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"Can't open. the device was removed.\n"); |
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return -ENODEV; |
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} |
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/* set alternate setting for audio interface */ |
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/* 1 - 48000 samples per sec */ |
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mutex_lock(&dev->lock); |
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if (dev->USE_ISO) |
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1); |
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else |
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); |
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mutex_unlock(&dev->lock); |
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if (ret < 0) { |
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dev_err(dev->dev, |
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"failed to set alternate setting !\n"); |
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return ret; |
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} |
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runtime->hw = snd_cx231xx_hw_capture; |
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mutex_lock(&dev->lock); |
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/* inform hardware to start streaming */ |
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ret = cx231xx_capture_start(dev, 1, Audio); |
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dev->adev.users++; |
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mutex_unlock(&dev->lock); |
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
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dev->adev.capture_pcm_substream = substream; |
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runtime->private_data = dev; |
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return 0; |
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} |
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static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream) |
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{ |
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int ret; |
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struct cx231xx *dev = snd_pcm_substream_chip(substream); |
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dev_dbg(dev->dev, "closing device\n"); |
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/* inform hardware to stop streaming */ |
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mutex_lock(&dev->lock); |
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ret = cx231xx_capture_start(dev, 0, Audio); |
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/* set alternate setting for audio interface */ |
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/* 1 - 48000 samples per sec */ |
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); |
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if (ret < 0) { |
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dev_err(dev->dev, |
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"failed to set alternate setting !\n"); |
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mutex_unlock(&dev->lock); |
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return ret; |
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} |
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dev->adev.users--; |
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mutex_unlock(&dev->lock); |
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if (dev->adev.users == 0 && dev->adev.shutdown == 1) { |
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dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users); |
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dev_dbg(dev->dev, "disabling audio stream!\n"); |
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dev->adev.shutdown = 0; |
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dev_dbg(dev->dev, "released lock\n"); |
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if (atomic_read(&dev->stream_started) > 0) { |
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atomic_set(&dev->stream_started, 0); |
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schedule_work(&dev->wq_trigger); |
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} |
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} |
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return 0; |
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} |
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static int snd_cx231xx_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct cx231xx *dev = snd_pcm_substream_chip(substream); |
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dev->adev.hwptr_done_capture = 0; |
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dev->adev.capture_transfer_done = 0; |
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return 0; |
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} |
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static void audio_trigger(struct work_struct *work) |
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{ |
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struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger); |
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if (atomic_read(&dev->stream_started)) { |
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dev_dbg(dev->dev, "starting capture"); |
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if (is_fw_load(dev) == 0) |
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cx25840_call(dev, core, load_fw); |
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if (dev->USE_ISO) |
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cx231xx_init_audio_isoc(dev); |
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else |
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cx231xx_init_audio_bulk(dev); |
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} else { |
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dev_dbg(dev->dev, "stopping capture"); |
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cx231xx_isoc_audio_deinit(dev); |
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} |
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} |
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static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream, |
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int cmd) |
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{ |
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struct cx231xx *dev = snd_pcm_substream_chip(substream); |
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int retval = 0; |
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if (dev->state & DEV_DISCONNECTED) |
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return -ENODEV; |
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spin_lock(&dev->adev.slock); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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atomic_set(&dev->stream_started, 1); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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atomic_set(&dev->stream_started, 0); |
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break; |
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default: |
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retval = -EINVAL; |
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break; |
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} |
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spin_unlock(&dev->adev.slock); |
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schedule_work(&dev->wq_trigger); |
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return retval; |
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} |
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static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream |
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*substream) |
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{ |
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struct cx231xx *dev; |
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unsigned long flags; |
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snd_pcm_uframes_t hwptr_done; |
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dev = snd_pcm_substream_chip(substream); |
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spin_lock_irqsave(&dev->adev.slock, flags); |
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hwptr_done = dev->adev.hwptr_done_capture; |
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spin_unlock_irqrestore(&dev->adev.slock, flags); |
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return hwptr_done; |
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} |
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static const struct snd_pcm_ops snd_cx231xx_pcm_capture = { |
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.open = snd_cx231xx_capture_open, |
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.close = snd_cx231xx_pcm_close, |
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.prepare = snd_cx231xx_prepare, |
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.trigger = snd_cx231xx_capture_trigger, |
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.pointer = snd_cx231xx_capture_pointer, |
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}; |
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static int cx231xx_audio_init(struct cx231xx *dev) |
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{ |
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struct cx231xx_audio *adev = &dev->adev; |
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struct snd_pcm *pcm; |
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struct snd_card *card; |
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static int devnr; |
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int err; |
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struct usb_interface *uif; |
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int i, isoc_pipe = 0; |
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|
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if (dev->has_alsa_audio != 1) { |
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/* This device does not support the extension (in this case |
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the device is expecting the snd-usb-audio module or |
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doesn't have analog audio support at all) */ |
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return 0; |
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} |
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|
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dev_dbg(dev->dev, |
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"probing for cx231xx non standard usbaudio\n"); |
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|
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err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio", |
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THIS_MODULE, 0, &card); |
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if (err < 0) |
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return err; |
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|
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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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Cx231xx Audio driver"); |
|
|
|
module_init(cx231xx_alsa_register); |
|
module_exit(cx231xx_alsa_unregister);
|
|
|