diff options
Diffstat (limited to 'drivers/media/pci/cx18')
51 files changed, 15270 insertions, 0 deletions
diff --git a/drivers/media/pci/cx18/Kconfig b/drivers/media/pci/cx18/Kconfig new file mode 100644 index 00000000000..53b3c770257 --- /dev/null +++ b/drivers/media/pci/cx18/Kconfig @@ -0,0 +1,35 @@ +config VIDEO_CX18 + tristate "Conexant cx23418 MPEG encoder support" + depends on VIDEO_V4L2 && DVB_CORE && PCI && I2C && EXPERIMENTAL + select I2C_ALGOBIT + select VIDEOBUF_VMALLOC + depends on RC_CORE + select VIDEO_TUNER + select VIDEO_TVEEPROM + select VIDEO_CX2341X + select VIDEO_CS5345 + select DVB_S5H1409 if !DVB_FE_CUSTOMISE + select MEDIA_TUNER_MXL5005S if !MEDIA_TUNER_CUSTOMISE + select DVB_S5H1411 if !DVB_FE_CUSTOMISE + select MEDIA_TUNER_TDA18271 if !MEDIA_TUNER_CUSTOMISE + select MEDIA_TUNER_TDA8290 if !MEDIA_TUNER_CUSTOMISE + ---help--- + This is a video4linux driver for Conexant cx23418 based + PCI combo video recorder devices. + + This is used in devices such as the Hauppauge HVR-1600 + cards. + + To compile this driver as a module, choose M here: the + module will be called cx18. + +config VIDEO_CX18_ALSA + tristate "Conexant 23418 DMA audio support" + depends on VIDEO_CX18 && SND && EXPERIMENTAL + select SND_PCM + ---help--- + This is a video4linux driver for direct (DMA) audio on + Conexant 23418 based TV cards using ALSA. + + To compile this driver as a module, choose M here: the + module will be called cx18-alsa. diff --git a/drivers/media/pci/cx18/Makefile b/drivers/media/pci/cx18/Makefile new file mode 100644 index 00000000000..d3ff1545c2c --- /dev/null +++ b/drivers/media/pci/cx18/Makefile @@ -0,0 +1,13 @@ +cx18-objs := cx18-driver.o cx18-cards.o cx18-i2c.o cx18-firmware.o cx18-gpio.o \ + cx18-queue.o cx18-streams.o cx18-fileops.o cx18-ioctl.o cx18-controls.o \ + cx18-mailbox.o cx18-vbi.o cx18-audio.o cx18-video.o cx18-irq.o \ + cx18-av-core.o cx18-av-audio.o cx18-av-firmware.o cx18-av-vbi.o cx18-scb.o \ + cx18-dvb.o cx18-io.o +cx18-alsa-objs := cx18-alsa-main.o cx18-alsa-pcm.o + +obj-$(CONFIG_VIDEO_CX18) += cx18.o +obj-$(CONFIG_VIDEO_CX18_ALSA) += cx18-alsa.o + +ccflags-y += -Idrivers/media/dvb-core +ccflags-y += -Idrivers/media/dvb-frontends +ccflags-y += -Idrivers/media/tuners diff --git a/drivers/media/pci/cx18/cx18-alsa-main.c b/drivers/media/pci/cx18/cx18-alsa-main.c new file mode 100644 index 00000000000..6d2a98246b6 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-alsa-main.c @@ -0,0 +1,295 @@ +/* + * ALSA interface to cx18 PCM capture streams + * + * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> + * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> + * + * Portions of this work were sponsored by ONELAN Limited. + * + * 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/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/spinlock.h> + +#include <media/v4l2-device.h> + +#include <sound/core.h> +#include <sound/initval.h> + +#include "cx18-driver.h" +#include "cx18-version.h" +#include "cx18-alsa.h" +#include "cx18-alsa-mixer.h" +#include "cx18-alsa-pcm.h" + +int cx18_alsa_debug; + +#define CX18_DEBUG_ALSA_INFO(fmt, arg...) \ + do { \ + if (cx18_alsa_debug & 2) \ + printk(KERN_INFO "%s: " fmt, "cx18-alsa", ## arg); \ + } while (0); + +module_param_named(debug, cx18_alsa_debug, int, 0644); +MODULE_PARM_DESC(debug, + "Debug level (bitmask). Default: 0\n" + "\t\t\t 1/0x0001: warning\n" + "\t\t\t 2/0x0002: info\n"); + +MODULE_AUTHOR("Andy Walls"); +MODULE_DESCRIPTION("CX23418 ALSA Interface"); +MODULE_SUPPORTED_DEVICE("CX23418 MPEG2 encoder"); +MODULE_LICENSE("GPL"); + +MODULE_VERSION(CX18_VERSION); + +static inline +struct snd_cx18_card *to_snd_cx18_card(struct v4l2_device *v4l2_dev) +{ + return to_cx18(v4l2_dev)->alsa; +} + +static inline +struct snd_cx18_card *p_to_snd_cx18_card(struct v4l2_device **v4l2_dev) +{ + return container_of(v4l2_dev, struct snd_cx18_card, v4l2_dev); +} + +static void snd_cx18_card_free(struct snd_cx18_card *cxsc) +{ + if (cxsc == NULL) + return; + + if (cxsc->v4l2_dev != NULL) + to_cx18(cxsc->v4l2_dev)->alsa = NULL; + + /* FIXME - take any other stopping actions needed */ + + kfree(cxsc); +} + +static void snd_cx18_card_private_free(struct snd_card *sc) +{ + if (sc == NULL) + return; + snd_cx18_card_free(sc->private_data); + sc->private_data = NULL; + sc->private_free = NULL; +} + +static int snd_cx18_card_create(struct v4l2_device *v4l2_dev, + struct snd_card *sc, + struct snd_cx18_card **cxsc) +{ + *cxsc = kzalloc(sizeof(struct snd_cx18_card), GFP_KERNEL); + if (*cxsc == NULL) + return -ENOMEM; + + (*cxsc)->v4l2_dev = v4l2_dev; + (*cxsc)->sc = sc; + + sc->private_data = *cxsc; + sc->private_free = snd_cx18_card_private_free; + + return 0; +} + +static int snd_cx18_card_set_names(struct snd_cx18_card *cxsc) +{ + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + struct snd_card *sc = cxsc->sc; + + /* sc->driver is used by alsa-lib's configurator: simple, unique */ + strlcpy(sc->driver, "CX23418", sizeof(sc->driver)); + + /* sc->shortname is a symlink in /proc/asound: CX18-M -> cardN */ + snprintf(sc->shortname, sizeof(sc->shortname), "CX18-%d", + cx->instance); + + /* sc->longname is read from /proc/asound/cards */ + snprintf(sc->longname, sizeof(sc->longname), + "CX23418 #%d %s TV/FM Radio/Line-In Capture", + cx->instance, cx->card_name); + + return 0; +} + +static int snd_cx18_init(struct v4l2_device *v4l2_dev) +{ + struct cx18 *cx = to_cx18(v4l2_dev); + struct snd_card *sc = NULL; + struct snd_cx18_card *cxsc; + int ret; + + /* Numbrs steps from "Writing an ALSA Driver" by Takashi Iwai */ + + /* (1) Check and increment the device index */ + /* This is a no-op for us. We'll use the cx->instance */ + + /* (2) Create a card instance */ + ret = snd_card_create(SNDRV_DEFAULT_IDX1, /* use first available id */ + SNDRV_DEFAULT_STR1, /* xid from end of shortname*/ + THIS_MODULE, 0, &sc); + if (ret) { + CX18_ALSA_ERR("%s: snd_card_create() failed with err %d\n", + __func__, ret); + goto err_exit; + } + + /* (3) Create a main component */ + ret = snd_cx18_card_create(v4l2_dev, sc, &cxsc); + if (ret) { + CX18_ALSA_ERR("%s: snd_cx18_card_create() failed with err %d\n", + __func__, ret); + goto err_exit_free; + } + + /* (4) Set the driver ID and name strings */ + snd_cx18_card_set_names(cxsc); + + + ret = snd_cx18_pcm_create(cxsc); + if (ret) { + CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n", + __func__, ret); + goto err_exit_free; + } + /* FIXME - proc files */ + + /* (7) Set the driver data and return 0 */ + /* We do this out of normal order for PCI drivers to avoid races */ + cx->alsa = cxsc; + + /* (6) Register the card instance */ + ret = snd_card_register(sc); + if (ret) { + cx->alsa = NULL; + CX18_ALSA_ERR("%s: snd_card_register() failed with err %d\n", + __func__, ret); + goto err_exit_free; + } + + return 0; + +err_exit_free: + if (sc != NULL) + snd_card_free(sc); + kfree(cxsc); +err_exit: + return ret; +} + +int cx18_alsa_load(struct cx18 *cx) +{ + struct v4l2_device *v4l2_dev = &cx->v4l2_dev; + struct cx18_stream *s; + + if (v4l2_dev == NULL) { + printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n", + __func__); + return 0; + } + + cx = to_cx18(v4l2_dev); + if (cx == NULL) { + printk(KERN_ERR "cx18-alsa cx is NULL\n"); + return 0; + } + + s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM]; + if (s->video_dev == NULL) { + CX18_DEBUG_ALSA_INFO("%s: PCM stream for card is disabled - " + "skipping\n", __func__); + return 0; + } + + if (cx->alsa != NULL) { + CX18_ALSA_ERR("%s: struct snd_cx18_card * already exists\n", + __func__); + return 0; + } + + if (snd_cx18_init(v4l2_dev)) { + CX18_ALSA_ERR("%s: failed to create struct snd_cx18_card\n", + __func__); + } else { + CX18_DEBUG_ALSA_INFO("%s: created cx18 ALSA interface instance " + "\n", __func__); + } + return 0; +} + +static int __init cx18_alsa_init(void) +{ + printk(KERN_INFO "cx18-alsa: module loading...\n"); + cx18_ext_init = &cx18_alsa_load; + return 0; +} + +static void __exit snd_cx18_exit(struct snd_cx18_card *cxsc) +{ + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + + /* FIXME - pointer checks & shutdown cxsc */ + + snd_card_free(cxsc->sc); + cx->alsa = NULL; +} + +static int __exit cx18_alsa_exit_callback(struct device *dev, void *data) +{ + struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); + struct snd_cx18_card *cxsc; + + if (v4l2_dev == NULL) { + printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n", + __func__); + return 0; + } + + cxsc = to_snd_cx18_card(v4l2_dev); + if (cxsc == NULL) { + CX18_ALSA_WARN("%s: struct snd_cx18_card * is NULL\n", + __func__); + return 0; + } + + snd_cx18_exit(cxsc); + return 0; +} + +static void __exit cx18_alsa_exit(void) +{ + struct device_driver *drv; + int ret; + + printk(KERN_INFO "cx18-alsa: module unloading...\n"); + + drv = driver_find("cx18", &pci_bus_type); + ret = driver_for_each_device(drv, NULL, NULL, cx18_alsa_exit_callback); + (void)ret; /* suppress compiler warning */ + + cx18_ext_init = NULL; + printk(KERN_INFO "cx18-alsa: module unload complete\n"); +} + +module_init(cx18_alsa_init); +module_exit(cx18_alsa_exit); diff --git a/drivers/media/pci/cx18/cx18-alsa-mixer.c b/drivers/media/pci/cx18/cx18-alsa-mixer.c new file mode 100644 index 00000000000..341bddc00b7 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-alsa-mixer.c @@ -0,0 +1,175 @@ +/* + * ALSA mixer controls for the + * ALSA interface to cx18 PCM capture streams + * + * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> + * + * 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/device.h> +#include <linux/spinlock.h> +#include <linux/videodev2.h> + +#include <media/v4l2-device.h> + +#include <sound/core.h> +#include <sound/control.h> +#include <sound/tlv.h> + +#include "cx18-alsa.h" +#include "cx18-driver.h" + +/* + * Note the cx18-av-core volume scale is funny, due to the alignment of the + * scale with another chip's range: + * + * v4l2_control value /512 indicated dB actual dB reg 0x8d4 + * 0x0000 - 0x01ff 0 -119 -96 228 + * 0x0200 - 0x02ff 1 -118 -96 228 + * ... + * 0x2c00 - 0x2dff 22 -97 -96 228 + * 0x2e00 - 0x2fff 23 -96 -96 228 + * 0x3000 - 0x31ff 24 -95 -95 226 + * ... + * 0xee00 - 0xefff 119 0 0 36 + * ... + * 0xfe00 - 0xffff 127 +8 +8 20 + */ +static inline int dB_to_cx18_av_vol(int dB) +{ + if (dB < -96) + dB = -96; + else if (dB > 8) + dB = 8; + return (dB + 119) << 9; +} + +static inline int cx18_av_vol_to_dB(int v) +{ + if (v < (23 << 9)) + v = (23 << 9); + else if (v > (127 << 9)) + v = (127 << 9); + return (v >> 9) - 119; +} + +static int snd_cx18_mixer_tv_vol_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + /* We're already translating values, just keep this control in dB */ + uinfo->value.integer.min = -96; + uinfo->value.integer.max = 8; + uinfo->value.integer.step = 1; + return 0; +} + +static int snd_cx18_mixer_tv_vol_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uctl) +{ + struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl); + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + struct v4l2_control vctrl; + int ret; + + vctrl.id = V4L2_CID_AUDIO_VOLUME; + vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]); + + snd_cx18_lock(cxsc); + ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl); + snd_cx18_unlock(cxsc); + + if (!ret) + uctl->value.integer.value[0] = cx18_av_vol_to_dB(vctrl.value); + return ret; +} + +static int snd_cx18_mixer_tv_vol_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uctl) +{ + struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl); + struct cx18 *cx = to_cx18(cxsc->v4l2_dev); + struct v4l2_control vctrl; + int ret; + + vctrl.id = V4L2_CID_AUDIO_VOLUME; + vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]); + + snd_cx18_lock(cxsc); + + /* Fetch current state */ + ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl); + + if (ret || + (cx18_av_vol_to_dB(vctrl.value) != uctl->value.integer.value[0])) { + + /* Set, if needed */ + vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]); + ret = v4l2_subdev_call(cx->sd_av, core, s_ctrl, &vctrl); + if (!ret) + ret = 1; /* Indicate control was changed w/o error */ + } + snd_cx18_unlock(cxsc); + + return ret; +} + + +/* This is a bit of overkill, the slider is already in dB internally */ +static DECLARE_TLV_DB_SCALE(snd_cx18_mixer_tv_vol_db_scale, -9600, 100, 0); + +static struct snd_kcontrol_new snd_cx18_mixer_tv_vol __initdata = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Analog TV Capture Volume", + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_READ, + .info = snd_cx18_mixer_tv_volume_info, + .get = snd_cx18_mixer_tv_volume_get, + .put = snd_cx18_mixer_tv_volume_put, + .tlv.p = snd_cx18_mixer_tv_vol_db_scale +}; + +/* FIXME - add mute switch and balance, bass, treble sliders: + V4L2_CID_AUDIO_MUTE + + V4L2_CID_AUDIO_BALANCE + + V4L2_CID_AUDIO_BASS + V4L2_CID_AUDIO_TREBLE +*/ + +/* FIXME - add stereo, lang1, lang2, mono menu */ +/* FIXME - add CS5345 I2S volume for HVR-1600 */ + +int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc) +{ + struct v4l2_device *v4l2_dev = cxsc->v4l2_dev; + struct snd_card *sc = cxsc->sc; + int ret; + + strlcpy(sc->mixername, "CX23418 Mixer", sizeof(sc->mixername)); + + ret = snd_ctl_add(sc, snd_ctl_new1(snd_cx18_mixer_tv_vol, cxsc)); + if (ret) { + CX18_ALSA_WARN("%s: failed to add %s control, err %d\n", + __func__, snd_cx18_mixer_tv_vol.name, ret); + } + return ret; +} diff --git a/drivers/media/pci/cx18/cx18-alsa-mixer.h b/drivers/media/pci/cx18/cx18-alsa-mixer.h new file mode 100644 index 00000000000..ec9238793f6 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-alsa-mixer.h @@ -0,0 +1,23 @@ +/* + * ALSA mixer controls for the + * ALSA interface to cx18 PCM capture streams + * + * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> + * + * 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 + */ + +int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc); diff --git a/drivers/media/pci/cx18/cx18-alsa-pcm.c b/drivers/media/pci/cx18/cx18-alsa-pcm.c new file mode 100644 index 00000000000..7a5b84a86bb --- /dev/null +++ b/drivers/media/pci/cx18/cx18-alsa-pcm.c @@ -0,0 +1,356 @@ +/* + * ALSA PCM device for the + * ALSA interface to cx18 PCM capture streams + * + * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> + * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> + * + * Portions of this work were sponsored by ONELAN Limited. + * + * 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 "cx18-driver.h" +#include "cx18-queue.h" +#include "cx18-streams.h" +#include "cx18-fileops.h" +#include "cx18-alsa.h" + +static unsigned int pcm_debug; +module_param(pcm_debug, int, 0644); +MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm"); + +#define dprintk(fmt, arg...) do { \ + if (pcm_debug) \ + printk(KERN_INFO "cx18-alsa-pcm %s: " fmt, \ + __func__, ##arg); \ + } while (0) + +static struct snd_pcm_hardware snd_cx18_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_48000, + + .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, */ +}; + +void cx18_alsa_announce_pcm_data(struct snd_cx18_card *cxsc, u8 *pcm_data, + size_t num_bytes) +{ + struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + unsigned int oldptr; + unsigned int stride; + int period_elapsed = 0; + int length; + + dprintk("cx18 alsa announce ptr=%p data=%p num_bytes=%zd\n", cxsc, + pcm_data, num_bytes); + + substream = cxsc->capture_pcm_substream; + if (substream == NULL) { + dprintk("substream was NULL\n"); + return; + } + + runtime = substream->runtime; + if (runtime == NULL) { + dprintk("runtime was NULL\n"); + return; + } + + stride = runtime->frame_bits >> 3; + if (stride == 0) { + dprintk("stride is zero\n"); + return; + } + + length = num_bytes / stride; + if (length == 0) { + dprintk("%s: length was zero\n", __func__); + return; + } + + if (runtime->dma_area == NULL) { + dprintk("dma area was NULL - ignoring\n"); + return; + } + + oldptr = cxsc->hwptr_done_capture; + if (oldptr + length >= runtime->buffer_size) { + unsigned int cnt = + runtime->buffer_size - oldptr; + memcpy(runtime->dma_area + oldptr * stride, pcm_data, + cnt * stride); + memcpy(runtime->dma_area, pcm_data + cnt * stride, + length * stride - cnt * stride); + } else { + memcpy(runtime->dma_area + oldptr * stride, pcm_data, + length * stride); + } + snd_pcm_stream_lock(substream); + + cxsc->hwptr_done_capture += length; + if (cxsc->hwptr_done_capture >= + runtime->buffer_size) + cxsc->hwptr_done_capture -= + runtime->buffer_size; + + cxsc->capture_transfer_done += length; + if (cxsc->capture_transfer_done >= + runtime->period_size) { + cxsc->capture_transfer_done -= + runtime->period_size; + period_elapsed = 1; + } + + snd_pcm_stream_unlock(substream); + + if (period_elapsed) + snd_pcm_period_elapsed(substream); +} + +static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream) +{ + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct v4l2_device *v4l2_dev = cxsc->v4l2_dev; + struct cx18 *cx = to_cx18(v4l2_dev); |