linux/sound/oss/vidc.c

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/*
* linux/drivers/sound/vidc.c
*
* Copyright (C) 1997-2000 by Russell King <rmk@arm.linux.org.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* VIDC20 audio driver.
*
* The VIDC20 sound hardware consists of the VIDC20 itself, a DAC and a DMA
* engine. The DMA transfers fixed-format (16-bit little-endian linear)
* samples to the VIDC20, which then transfers this data serially to the
* DACs. The samplerate is controlled by the VIDC.
*
* We currently support a mixer device, but it is currently non-functional.
*/
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 <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <mach/hardware.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/hardware/iomd.h>
#include <asm/irq.h>
#include "sound_config.h"
#include "vidc.h"
#ifndef _SIOC_TYPE
#define _SIOC_TYPE(x) _IOC_TYPE(x)
#endif
#ifndef _SIOC_NR
#define _SIOC_NR(x) _IOC_NR(x)
#endif
#define VIDC_SOUND_CLOCK (250000)
#define VIDC_SOUND_CLOCK_EXT (176400)
/*
* When using SERIAL SOUND mode (external DAC), the number of physical
* channels is fixed at 2.
*/
static int vidc_busy;
static int vidc_adev;
static int vidc_audio_rate;
static char vidc_audio_format;
static char vidc_audio_channels;
static unsigned char vidc_level_l[SOUND_MIXER_NRDEVICES] = {
85, /* master */
50, /* bass */
50, /* treble */
0, /* synth */
75, /* pcm */
0, /* speaker */
100, /* ext line */
0, /* mic */
100, /* CD */
0,
};
static unsigned char vidc_level_r[SOUND_MIXER_NRDEVICES] = {
85, /* master */
50, /* bass */
50, /* treble */
0, /* synth */
75, /* pcm */
0, /* speaker */
100, /* ext line */
0, /* mic */
100, /* CD */
0,
};
static unsigned int vidc_audio_volume_l; /* left PCM vol, 0 - 65536 */
static unsigned int vidc_audio_volume_r; /* right PCM vol, 0 - 65536 */
extern void vidc_update_filler(int bits, int channels);
extern int softoss_dev;
static void
vidc_mixer_set(int mdev, unsigned int level)
{
unsigned int lev_l = level & 0x007f;
unsigned int lev_r = (level & 0x7f00) >> 8;
unsigned int mlev_l, mlev_r;
if (lev_l > 100)
lev_l = 100;
if (lev_r > 100)
lev_r = 100;
#define SCALE(lev,master) ((lev) * (master) * 65536 / 10000)
mlev_l = vidc_level_l[SOUND_MIXER_VOLUME];
mlev_r = vidc_level_r[SOUND_MIXER_VOLUME];
switch (mdev) {
case SOUND_MIXER_VOLUME:
case SOUND_MIXER_PCM:
vidc_level_l[mdev] = lev_l;
vidc_level_r[mdev] = lev_r;
vidc_audio_volume_l = SCALE(lev_l, mlev_l);
vidc_audio_volume_r = SCALE(lev_r, mlev_r);
/*printk("VIDC: PCM vol %05X %05X\n", vidc_audio_volume_l, vidc_audio_volume_r);*/
break;
}
#undef SCALE
}
static int vidc_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
{
unsigned int val;
unsigned int mdev;
if (_SIOC_TYPE(cmd) != 'M')
return -EINVAL;
mdev = _SIOC_NR(cmd);
if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
if (get_user(val, (unsigned int __user *)arg))
return -EFAULT;
if (mdev < SOUND_MIXER_NRDEVICES)
vidc_mixer_set(mdev, val);
else
return -EINVAL;
}
/*
* Return parameters
*/
switch (mdev) {
case SOUND_MIXER_RECSRC:
val = 0;
break;
case SOUND_MIXER_DEVMASK:
val = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
break;
case SOUND_MIXER_STEREODEVS:
val = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
break;
case SOUND_MIXER_RECMASK:
val = 0;
break;
case SOUND_MIXER_CAPS:
val = 0;
break;
default:
if (mdev < SOUND_MIXER_NRDEVICES)
val = vidc_level_l[mdev] | vidc_level_r[mdev] << 8;
else
return -EINVAL;
}
return put_user(val, (unsigned int __user *)arg) ? -EFAULT : 0;
}
static unsigned int vidc_audio_set_format(int dev, unsigned int fmt)
{
switch (fmt) {
default:
fmt = AFMT_S16_LE;
case AFMT_U8:
case AFMT_S8:
case AFMT_S16_LE:
vidc_audio_format = fmt;
vidc_update_filler(vidc_audio_format, vidc_audio_channels);
case AFMT_QUERY:
break;
}
return vidc_audio_format;
}
#define my_abs(i) ((i)<0 ? -(i) : (i))
static int vidc_audio_set_speed(int dev, int rate)
{
if (rate) {
unsigned int hwctrl, hwrate, hwrate_ext, rate_int, rate_ext;
unsigned int diff_int, diff_ext;
unsigned int newsize, new2size;
hwctrl = 0x00000003;
/* Using internal clock */
hwrate = (((VIDC_SOUND_CLOCK * 2) / rate) + 1) >> 1;
if (hwrate < 3)
hwrate = 3;
if (hwrate > 255)
hwrate = 255;
/* Using exernal clock */
hwrate_ext = (((VIDC_SOUND_CLOCK_EXT * 2) / rate) + 1) >> 1;
if (hwrate_ext < 3)
hwrate_ext = 3;
if (hwrate_ext > 255)
hwrate_ext = 255;
rate_int = VIDC_SOUND_CLOCK / hwrate;
rate_ext = VIDC_SOUND_CLOCK_EXT / hwrate_ext;
/* Chose between external and internal clock */
diff_int = my_abs(rate_ext-rate);
diff_ext = my_abs(rate_int-rate);
if (diff_ext < diff_int) {
/*printk("VIDC: external %d %d %d\n", rate, rate_ext, hwrate_ext);*/
hwrate=hwrate_ext;
hwctrl=0x00000002;
/* Allow roughly 0.4% tolerance */
if (diff_ext > (rate/256))
rate=rate_ext;
} else {
/*printk("VIDC: internal %d %d %d\n", rate, rate_int, hwrate);*/
hwctrl=0x00000003;
/* Allow roughly 0.4% tolerance */
if (diff_int > (rate/256))
rate=rate_int;
}
vidc_writel(0xb0000000 | (hwrate - 2));
vidc_writel(0xb1000000 | hwctrl);
newsize = (10000 / hwrate) & ~3;
if (newsize < 208)
newsize = 208;
if (newsize > 4096)
newsize = 4096;
for (new2size = 128; new2size < newsize; new2size <<= 1);
if (new2size - newsize > newsize - (new2size >> 1))
new2size >>= 1;
if (new2size > 4096) {
printk(KERN_ERR "VIDC: error: dma buffer (%d) %d > 4K\n",
newsize, new2size);
new2size = 4096;
}
/*printk("VIDC: dma size %d\n", new2size);*/
dma_bufsize = new2size;
vidc_audio_rate = rate;
}
return vidc_audio_rate;
}
static short vidc_audio_set_channels(int dev, short channels)
{
switch (channels) {
default:
channels = 2;
case 1:
case 2:
vidc_audio_channels = channels;
vidc_update_filler(vidc_audio_format, vidc_audio_channels);
case 0:
break;
}
return vidc_audio_channels;
}
/*
* Open the device
*/
static int vidc_audio_open(int dev, int mode)
{
/* This audio device does not have recording capability */
if (mode == OPEN_READ)
return -EPERM;
if (vidc_busy)
return -EBUSY;
vidc_busy = 1;
return 0;
}
/*
* Close the device
*/
static void vidc_audio_close(int dev)
{
vidc_busy = 0;
}
/*
* Output a block via DMA to sound device.
*
* We just set the DMA start and count; the DMA interrupt routine
* will take care of formatting the samples (via the appropriate
* vidc_filler routine), and flag via vidc_audio_dma_interrupt when
* more data is required.
*/
static void
vidc_audio_output_block(int dev, unsigned long buf, int total_count, int one)
{
struct dma_buffparms *dmap = audio_devs[dev]->dmap_out;
unsigned long flags;
local_irq_save(flags);
dma_start = buf - (unsigned long)dmap->raw_buf_phys + (unsigned long)dmap->raw_buf;
dma_count = total_count;
local_irq_restore(flags);
}
static void
vidc_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
{
}
static int vidc_audio_prepare_for_input(int dev, int bsize, int bcount)
{
return -EINVAL;
}
static irqreturn_t vidc_audio_dma_interrupt(void)
{
DMAbuf_outputintr(vidc_adev, 1);
return IRQ_HANDLED;
}
/*
* Prepare for outputting samples.
*
* Each buffer that will be passed will be `bsize' bytes long,
* with a total of `bcount' buffers.
*/
static int vidc_audio_prepare_for_output(int dev, int bsize, int bcount)
{
struct audio_operations *adev = audio_devs[dev];
dma_interrupt = NULL;
adev->dmap_out->flags |= DMA_NODMA;
return 0;
}
/*
* Stop our current operation.
*/
static void vidc_audio_reset(int dev)
{
dma_interrupt = NULL;
}
static int vidc_audio_local_qlen(int dev)
{
return /*dma_count !=*/ 0;
}
static void vidc_audio_trigger(int dev, int enable_bits)
{
struct audio_operations *adev = audio_devs[dev];
if (enable_bits & PCM_ENABLE_OUTPUT) {
if (!(adev->dmap_out->flags & DMA_ACTIVE)) {
unsigned long flags;
local_irq_save(flags);
/* prevent recusion */
adev->dmap_out->flags |= DMA_ACTIVE;
dma_interrupt = vidc_audio_dma_interrupt;
vidc_sound_dma_irq(0, NULL);
iomd_writeb(DMA_CR_E | 0x10, IOMD_SD0CR);
local_irq_restore(flags);
}
}
}
static struct audio_driver vidc_audio_driver =
{
.owner = THIS_MODULE,
.open = vidc_audio_open,
.close = vidc_audio_close,
.output_block = vidc_audio_output_block,
.start_input = vidc_audio_start_input,
.prepare_for_input = vidc_audio_prepare_for_input,
.prepare_for_output = vidc_audio_prepare_for_output,
.halt_io = vidc_audio_reset,
.local_qlen = vidc_audio_local_qlen,
.trigger = vidc_audio_trigger,
.set_speed = vidc_audio_set_speed,
.set_bits = vidc_audio_set_format,
.set_channels = vidc_audio_set_channels
};
static struct mixer_operations vidc_mixer_operations = {
.owner = THIS_MODULE,
.id = "VIDC",
.name = "VIDCsound",
.ioctl = vidc_mixer_ioctl
};
void vidc_update_filler(int format, int channels)
{
#define TYPE(fmt,ch) (((fmt)<<2) | ((ch)&3))
switch (TYPE(format, channels)) {
default:
case TYPE(AFMT_U8, 1):
vidc_filler = vidc_fill_1x8_u;
break;
case TYPE(AFMT_U8, 2):
vidc_filler = vidc_fill_2x8_u;
break;
case TYPE(AFMT_S8, 1):
vidc_filler = vidc_fill_1x8_s;
break;
case TYPE(AFMT_S8, 2):
vidc_filler = vidc_fill_2x8_s;
break;
case TYPE(AFMT_S16_LE, 1):
vidc_filler = vidc_fill_1x16_s;
break;
case TYPE(AFMT_S16_LE, 2):
vidc_filler = vidc_fill_2x16_s;
break;
}
}
static void __init attach_vidc(struct address_info *hw_config)
{
char name[32];
int i, adev;
sprintf(name, "VIDC %d-bit sound", hw_config->card_subtype);
conf_printf(name, hw_config);
memset(dma_buf, 0, sizeof(dma_buf));
adev = sound_install_audiodrv(AUDIO_DRIVER_VERSION, name,
&vidc_audio_driver, sizeof(vidc_audio_driver),
DMA_AUTOMODE, AFMT_U8 | AFMT_S8 | AFMT_S16_LE,
NULL, hw_config->dma, hw_config->dma2);
if (adev < 0)
goto audio_failed;
/*
* 1024 bytes => 64 buffers
*/
audio_devs[adev]->min_fragment = 10;
audio_devs[adev]->mixer_dev = num_mixers;
audio_devs[adev]->mixer_dev =
sound_install_mixer(MIXER_DRIVER_VERSION,
name, &vidc_mixer_operations,
sizeof(vidc_mixer_operations), NULL);
if (audio_devs[adev]->mixer_dev < 0)
goto mixer_failed;
for (i = 0; i < 2; i++) {
dma_buf[i] = get_zeroed_page(GFP_KERNEL);
if (!dma_buf[i]) {
printk(KERN_ERR "%s: can't allocate required buffers\n",
name);
goto mem_failed;
}
dma_pbuf[i] = virt_to_phys((void *)dma_buf[i]);
}
if (sound_alloc_dma(hw_config->dma, hw_config->name)) {
printk(KERN_ERR "%s: DMA %d is in use\n", name, hw_config->dma);
goto dma_failed;
}
if (request_irq(hw_config->irq, vidc_sound_dma_irq, 0,
hw_config->name, &dma_start)) {
printk(KERN_ERR "%s: IRQ %d is in use\n", name, hw_config->irq);
goto irq_failed;
}
vidc_adev = adev;
vidc_mixer_set(SOUND_MIXER_VOLUME, (85 | 85 << 8));
return;
irq_failed:
sound_free_dma(hw_config->dma);
dma_failed:
mem_failed:
for (i = 0; i < 2; i++)
free_page(dma_buf[i]);
sound_unload_mixerdev(audio_devs[adev]->mixer_dev);
mixer_failed:
sound_unload_audiodev(adev);
audio_failed:
return;
}
static int __init probe_vidc(struct address_info *hw_config)
{
hw_config->irq = IRQ_DMAS0;
hw_config->dma = DMA_VIRTUAL_SOUND;
hw_config->dma2 = -1;
hw_config->card_subtype = 16;
hw_config->name = "VIDC20";
return 1;
}
static void __exit unload_vidc(struct address_info *hw_config)
{
int i, adev = vidc_adev;
vidc_adev = -1;
free_irq(hw_config->irq, &dma_start);
sound_free_dma(hw_config->dma);
if (adev >= 0) {
sound_unload_mixerdev(audio_devs[adev]->mixer_dev);
sound_unload_audiodev(adev);
for (i = 0; i < 2; i++)
free_page(dma_buf[i]);
}
}
static struct address_info cfg;
static int __init init_vidc(void)
{
if (probe_vidc(&cfg) == 0)
return -ENODEV;
attach_vidc(&cfg);
return 0;
}
static void __exit cleanup_vidc(void)
{
unload_vidc(&cfg);
}
module_init(init_vidc);
module_exit(cleanup_vidc);
MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("VIDC20 audio driver");
MODULE_LICENSE("GPL");