+++ /dev/null
-/*
- * 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 <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");
git.samba.org / sfrench / cifs-2.6.git / blobdiff