diff options
Diffstat (limited to 'drivers/media/pci/ivtv/ivtv-alsa-pcm.c')
| -rw-r--r-- | drivers/media/pci/ivtv/ivtv-alsa-pcm.c | 116 |
1 files changed, 16 insertions, 100 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-alsa-pcm.c b/drivers/media/pci/ivtv/ivtv-alsa-pcm.c index e1863dbf4edc..269a799ec046 100644 --- a/drivers/media/pci/ivtv/ivtv-alsa-pcm.c +++ b/drivers/media/pci/ivtv/ivtv-alsa-pcm.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA PCM device for the * ALSA interface to ivtv PCM capture streams @@ -6,32 +7,8 @@ * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> * * Portions of this work were sponsored by ONELAN Limited for the cx18 driver - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - * 02111-1307 USA */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/vmalloc.h> - -#include <media/v4l2-device.h> - -#include <sound/core.h> -#include <sound/pcm.h> - #include "ivtv-driver.h" #include "ivtv-queue.h" #include "ivtv-streams.h" @@ -39,6 +16,10 @@ #include "ivtv-alsa.h" #include "ivtv-alsa-pcm.h" +#include <sound/core.h> +#include <sound/pcm.h> + + static unsigned int pcm_debug; module_param(pcm_debug, int, 0644); MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm"); @@ -49,7 +30,7 @@ MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm"); pr_info("ivtv-alsa-pcm %s: " fmt, __func__, ##arg); \ } while (0) -static struct snd_pcm_hardware snd_ivtv_hw_capture = { +static const struct snd_pcm_hardware snd_ivtv_hw_capture = { .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | @@ -81,7 +62,7 @@ static void ivtv_alsa_announce_pcm_data(struct snd_ivtv_card *itvsc, int period_elapsed = 0; int length; - dprintk("ivtv alsa announce ptr=%p data=%p num_bytes=%zd\n", itvsc, + dprintk("ivtv alsa announce ptr=%p data=%p num_bytes=%zu\n", itvsc, pcm_data, num_bytes); substream = itvsc->capture_pcm_substream; @@ -159,9 +140,14 @@ static int snd_ivtv_pcm_capture_open(struct snd_pcm_substream *substream) /* Instruct the CX2341[56] to start sending packets */ snd_ivtv_lock(itvsc); + + if (ivtv_init_on_first_open(itv)) { + snd_ivtv_unlock(itvsc); + return -ENXIO; + } + s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM]; - v4l2_fh_init(&item.fh, s->vdev); item.itv = itv; item.type = s->type; @@ -216,65 +202,6 @@ static int snd_ivtv_pcm_capture_close(struct snd_pcm_substream *substream) return 0; } -static int snd_ivtv_pcm_ioctl(struct snd_pcm_substream *substream, - unsigned int cmd, void *arg) -{ - struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream); - int ret; - - snd_ivtv_lock(itvsc); - ret = snd_pcm_lib_ioctl(substream, cmd, arg); - snd_ivtv_unlock(itvsc); - return ret; -} - - -static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, - size_t size) -{ - struct snd_pcm_runtime *runtime = subs->runtime; - - dprintk("Allocating vbuffer\n"); - if (runtime->dma_area) { - if (runtime->dma_bytes > size) - return 0; - - vfree(runtime->dma_area); - } - runtime->dma_area = vmalloc(size); - if (!runtime->dma_area) - return -ENOMEM; - - runtime->dma_bytes = size; - - return 0; -} - -static int snd_ivtv_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - dprintk("%s called\n", __func__); - - return snd_pcm_alloc_vmalloc_buffer(substream, - params_buffer_bytes(params)); -} - -static int snd_ivtv_pcm_hw_free(struct snd_pcm_substream *substream) -{ - struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream); - unsigned long flags; - - spin_lock_irqsave(&itvsc->slock, flags); - if (substream->runtime->dma_area) { - dprintk("freeing pcm capture region\n"); - vfree(substream->runtime->dma_area); - substream->runtime->dma_area = NULL; - } - spin_unlock_irqrestore(&itvsc->slock, flags); - - return 0; -} - static int snd_ivtv_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream); @@ -304,24 +231,12 @@ snd_pcm_uframes_t snd_ivtv_pcm_pointer(struct snd_pcm_substream *substream) return hwptr_done; } -static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, - unsigned long offset) -{ - void *pageptr = subs->runtime->dma_area + offset; - - return vmalloc_to_page(pageptr); -} - -static struct snd_pcm_ops snd_ivtv_pcm_capture_ops = { +static const struct snd_pcm_ops snd_ivtv_pcm_capture_ops = { .open = snd_ivtv_pcm_capture_open, .close = snd_ivtv_pcm_capture_close, - .ioctl = snd_ivtv_pcm_ioctl, - .hw_params = snd_ivtv_pcm_hw_params, - .hw_free = snd_ivtv_pcm_hw_free, .prepare = snd_ivtv_pcm_prepare, .trigger = snd_ivtv_pcm_trigger, .pointer = snd_ivtv_pcm_pointer, - .page = snd_pcm_get_vmalloc_page, }; int snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc) @@ -347,9 +262,10 @@ int snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc) snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE, &snd_ivtv_pcm_capture_ops); + snd_pcm_set_managed_buffer_all(sp, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); sp->info_flags = 0; sp->private_data = itvsc; - strlcpy(sp->name, itv->card_name, sizeof(sp->name)); + strscpy(sp->name, itv->card_name, sizeof(sp->name)); return 0; |