linux/drivers/media/video/tlg2300/pd-alsa.c

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#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/init.h>
#include <linux/sound.h>
#include <linux/spinlock.h>
#include <linux/soundcard.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
#include <linux/module.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/gfp.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>
#include "pd-common.h"
#include "vendorcmds.h"
static void complete_handler_audio(struct urb *urb);
#define AUDIO_EP (0x83)
#define AUDIO_BUF_SIZE (512)
#define PERIOD_SIZE (1024 * 8)
#define PERIOD_MIN (4)
#define PERIOD_MAX PERIOD_MIN
static struct snd_pcm_hardware snd_pd_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 = PERIOD_SIZE * PERIOD_MIN,
.period_bytes_min = PERIOD_SIZE,
.period_bytes_max = PERIOD_SIZE,
.periods_min = PERIOD_MIN,
.periods_max = PERIOD_MAX,
/*
.buffer_bytes_max = 62720 * 8,
.period_bytes_min = 64,
.period_bytes_max = 12544,
.periods_min = 2,
.periods_max = 98
*/
};
static int snd_pd_capture_open(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
struct snd_pcm_runtime *runtime = substream->runtime;
if (!p)
return -ENODEV;
pa->users++;
pa->card_close = 0;
pa->capture_pcm_substream = substream;
runtime->private_data = p;
runtime->hw = snd_pd_hw_capture;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
usb_autopm_get_interface(p->interface);
kref_get(&p->kref);
return 0;
}
static int snd_pd_pcm_close(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
pa->users--;
pa->card_close = 1;
usb_autopm_put_interface(p->interface);
kref_put(&p->kref, poseidon_delete);
return 0;
}
static int snd_pd_hw_capture_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int size;
size = params_buffer_bytes(hw_params);
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;
else
runtime->dma_bytes = size;
return 0;
}
static int audio_buf_free(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
int i;
for (i = 0; i < AUDIO_BUFS; i++)
if (pa->urb_array[i])
usb_kill_urb(pa->urb_array[i]);
free_all_urb_generic(pa->urb_array, AUDIO_BUFS);
logpm();
return 0;
}
static int snd_pd_hw_capture_free(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
logpm();
audio_buf_free(p);
return 0;
}
static int snd_pd_prepare(struct snd_pcm_substream *substream)
{
return 0;
}
#define AUDIO_TRAILER_SIZE (16)
static inline void handle_audio_data(struct urb *urb, int *period_elapsed)
{
struct poseidon_audio *pa = urb->context;
struct snd_pcm_runtime *runtime = pa->capture_pcm_substream->runtime;
int stride = runtime->frame_bits >> 3;
int len = urb->actual_length / stride;
unsigned char *cp = urb->transfer_buffer;
unsigned int oldptr = pa->rcv_position;
if (urb->actual_length == AUDIO_BUF_SIZE - 4)
len -= (AUDIO_TRAILER_SIZE / stride);
/* do the copy */
if (oldptr + len >= runtime->buffer_size) {
unsigned int cnt = runtime->buffer_size - oldptr;
memcpy(runtime->dma_area + oldptr * stride, cp, cnt * stride);
memcpy(runtime->dma_area, (cp + cnt * stride),
(len * stride - cnt * stride));
} else
memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
/* update the statas */
snd_pcm_stream_lock(pa->capture_pcm_substream);
pa->rcv_position += len;
if (pa->rcv_position >= runtime->buffer_size)
pa->rcv_position -= runtime->buffer_size;
pa->copied_position += (len);
if (pa->copied_position >= runtime->period_size) {
pa->copied_position -= runtime->period_size;
*period_elapsed = 1;
}
snd_pcm_stream_unlock(pa->capture_pcm_substream);
}
static void complete_handler_audio(struct urb *urb)
{
struct poseidon_audio *pa = urb->context;
struct snd_pcm_substream *substream = pa->capture_pcm_substream;
int period_elapsed = 0;
int ret;
if (1 == pa->card_close || pa->capture_stream != STREAM_ON)
return;
if (urb->status != 0) {
/*if (urb->status == -ESHUTDOWN)*/
return;
}
if (substream) {
if (urb->actual_length) {
handle_audio_data(urb, &period_elapsed);
if (period_elapsed)
snd_pcm_period_elapsed(substream);
}
}
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0)
log("audio urb failed (errcod = %i)", ret);
return;
}
static int fire_audio_urb(struct poseidon *p)
{
int i, ret = 0;
struct poseidon_audio *pa = &p->audio;
alloc_bulk_urbs_generic(pa->urb_array, AUDIO_BUFS,
p->udev, AUDIO_EP,
AUDIO_BUF_SIZE, GFP_ATOMIC,
complete_handler_audio, pa);
for (i = 0; i < AUDIO_BUFS; i++) {
ret = usb_submit_urb(pa->urb_array[i], GFP_KERNEL);
if (ret)
log("urb err : %d", ret);
}
log();
return ret;
}
static int snd_pd_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
if (debug_mode)
log("cmd %d, audio stat : %d\n", cmd, pa->capture_stream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_START:
if (pa->capture_stream == STREAM_ON)
return 0;
pa->rcv_position = pa->copied_position = 0;
pa->capture_stream = STREAM_ON;
if (in_hibernation(p))
return 0;
fire_audio_urb(p);
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
pa->capture_stream = STREAM_SUSPEND;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
pa->capture_stream = STREAM_OFF;
return 0;
default:
return -EINVAL;
}
}
static snd_pcm_uframes_t
snd_pd_capture_pointer(struct snd_pcm_substream *substream)
{
struct poseidon *p = snd_pcm_substream_chip(substream);
struct poseidon_audio *pa = &p->audio;
return pa->rcv_position;
}
static struct page *snd_pcm_pd_get_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 pcm_capture_ops = {
.open = snd_pd_capture_open,
.close = snd_pd_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_pd_hw_capture_params,
.hw_free = snd_pd_hw_capture_free,
.prepare = snd_pd_prepare,
.trigger = snd_pd_capture_trigger,
.pointer = snd_pd_capture_pointer,
.page = snd_pcm_pd_get_page,
};
#ifdef CONFIG_PM
int pm_alsa_suspend(struct poseidon *p)
{
logpm(p);
audio_buf_free(p);
return 0;
}
int pm_alsa_resume(struct poseidon *p)
{
logpm(p);
fire_audio_urb(p);
return 0;
}
#endif
int poseidon_audio_init(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
struct snd_card *card;
struct snd_pcm *pcm;
int ret;
ret = snd_card_create(-1, "Telegent", THIS_MODULE, 0, &card);
if (ret != 0)
return ret;
ret = snd_pcm_new(card, "poseidon audio", 0, 0, 1, &pcm);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
pcm->info_flags = 0;
pcm->private_data = p;
strcpy(pcm->name, "poseidon audio capture");
strcpy(card->driver, "ALSA driver");
strcpy(card->shortname, "poseidon Audio");
strcpy(card->longname, "poseidon ALSA Audio");
if (snd_card_register(card)) {
snd_card_free(card);
return -ENOMEM;
}
pa->card = card;
return 0;
}
int poseidon_audio_free(struct poseidon *p)
{
struct poseidon_audio *pa = &p->audio;
if (pa->card)
snd_card_free(pa->card);
return 0;
}