326 lines
6.2 KiB
C
326 lines
6.2 KiB
C
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/version.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sound.h>
|
|
#include <linux/soundcard.h>
|
|
#include <asm/io.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/delay.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <asm/cpu/dac.h>
|
|
|
|
#ifdef MACH_HP600
|
|
#include <asm/hp6xx/hp6xx.h>
|
|
#include <asm/hd64461/hd64461.h>
|
|
#endif
|
|
|
|
#define MODNAME "sh_dac_audio"
|
|
|
|
#define TMU_TOCR_INIT 0x00
|
|
|
|
#define TMU1_TCR_INIT 0x0020 /* Clock/4, rising edge; interrupt on */
|
|
#define TMU1_TSTR_INIT 0x02 /* Bit to turn on TMU1 */
|
|
|
|
#define TMU_TSTR 0xfffffe92
|
|
#define TMU1_TCOR 0xfffffea0
|
|
#define TMU1_TCNT 0xfffffea4
|
|
#define TMU1_TCR 0xfffffea8
|
|
|
|
#define BUFFER_SIZE 48000
|
|
|
|
static int rate;
|
|
static int empty;
|
|
static char *data_buffer, *buffer_begin, *buffer_end;
|
|
static int in_use, device_major;
|
|
|
|
static void dac_audio_start_timer(void)
|
|
{
|
|
u8 tstr;
|
|
|
|
tstr = ctrl_inb(TMU_TSTR);
|
|
tstr |= TMU1_TSTR_INIT;
|
|
ctrl_outb(tstr, TMU_TSTR);
|
|
}
|
|
|
|
static void dac_audio_stop_timer(void)
|
|
{
|
|
u8 tstr;
|
|
|
|
tstr = ctrl_inb(TMU_TSTR);
|
|
tstr &= ~TMU1_TSTR_INIT;
|
|
ctrl_outb(tstr, TMU_TSTR);
|
|
}
|
|
|
|
static void dac_audio_reset(void)
|
|
{
|
|
dac_audio_stop_timer();
|
|
buffer_begin = buffer_end = data_buffer;
|
|
empty = 1;
|
|
}
|
|
|
|
static void dac_audio_sync(void)
|
|
{
|
|
while (!empty)
|
|
schedule();
|
|
}
|
|
|
|
static void dac_audio_start(void)
|
|
{
|
|
#ifdef MACH_HP600
|
|
u16 v;
|
|
v = inw(HD64461_GPADR);
|
|
v &= ~HD64461_GPADR_SPEAKER;
|
|
outw(v, HD64461_GPADR);
|
|
#endif
|
|
sh_dac_enable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
|
|
ctrl_outw(TMU1_TCR_INIT, TMU1_TCR);
|
|
}
|
|
static void dac_audio_stop(void)
|
|
{
|
|
#ifdef MACH_HP600
|
|
u16 v;
|
|
#endif
|
|
dac_audio_stop_timer();
|
|
#ifdef MACH_HP600
|
|
v = inw(HD64461_GPADR);
|
|
v |= HD64461_GPADR_SPEAKER;
|
|
outw(v, HD64461_GPADR);
|
|
#endif
|
|
sh_dac_disable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
|
|
}
|
|
|
|
static void dac_audio_set_rate(void)
|
|
{
|
|
unsigned long interval;
|
|
|
|
interval = (current_cpu_data.module_clock / 4) / rate;
|
|
ctrl_outl(interval, TMU1_TCOR);
|
|
ctrl_outl(interval, TMU1_TCNT);
|
|
}
|
|
|
|
static int dac_audio_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
int val;
|
|
|
|
switch (cmd) {
|
|
case OSS_GETVERSION:
|
|
return put_user(SOUND_VERSION, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SYNC:
|
|
dac_audio_sync();
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_RESET:
|
|
dac_audio_reset();
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETFMTS:
|
|
return put_user(AFMT_U8, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SETFMT:
|
|
return put_user(AFMT_U8, (int *)arg);
|
|
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
file->f_flags |= O_NONBLOCK;
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETCAPS:
|
|
return 0;
|
|
|
|
case SOUND_PCM_WRITE_RATE:
|
|
val = *(int *)arg;
|
|
if (val > 0) {
|
|
rate = val;
|
|
dac_audio_set_rate();
|
|
}
|
|
return put_user(rate, (int *)arg);
|
|
|
|
case SNDCTL_DSP_STEREO:
|
|
return put_user(0, (int *)arg);
|
|
|
|
case SOUND_PCM_WRITE_CHANNELS:
|
|
return put_user(1, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
return -EINVAL;
|
|
|
|
case SNDCTL_DSP_PROFILE:
|
|
return -EINVAL;
|
|
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
return put_user(BUFFER_SIZE, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
return 0;
|
|
|
|
default:
|
|
printk(KERN_ERR "sh_dac_audio: unimplemented ioctl=0x%x\n",
|
|
cmd);
|
|
return -EINVAL;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t dac_audio_write(struct file *file, const char *buf, size_t count,
|
|
loff_t * ppos)
|
|
{
|
|
int free;
|
|
int nbytes;
|
|
|
|
if (count < 0)
|
|
return -EINVAL;
|
|
|
|
if (!count) {
|
|
dac_audio_sync();
|
|
return 0;
|
|
}
|
|
|
|
free = buffer_begin - buffer_end;
|
|
|
|
if (free < 0)
|
|
free += BUFFER_SIZE;
|
|
if ((free == 0) && (empty))
|
|
free = BUFFER_SIZE;
|
|
if (count > free)
|
|
count = free;
|
|
if (buffer_begin > buffer_end) {
|
|
if (copy_from_user((void *)buffer_end, buf, count))
|
|
return -EFAULT;
|
|
|
|
buffer_end += count;
|
|
} else {
|
|
nbytes = data_buffer + BUFFER_SIZE - buffer_end;
|
|
if (nbytes > count) {
|
|
if (copy_from_user((void *)buffer_end, buf, count))
|
|
return -EFAULT;
|
|
buffer_end += count;
|
|
} else {
|
|
if (copy_from_user((void *)buffer_end, buf, nbytes))
|
|
return -EFAULT;
|
|
if (copy_from_user
|
|
((void *)data_buffer, buf + nbytes, count - nbytes))
|
|
return -EFAULT;
|
|
buffer_end = data_buffer + count - nbytes;
|
|
}
|
|
}
|
|
|
|
if (empty) {
|
|
empty = 0;
|
|
dac_audio_start_timer();
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t dac_audio_read(struct file *file, char *buf, size_t count,
|
|
loff_t * ppos)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int dac_audio_open(struct inode *inode, struct file *file)
|
|
{
|
|
if (file->f_mode & FMODE_READ)
|
|
return -ENODEV;
|
|
if (in_use)
|
|
return -EBUSY;
|
|
|
|
in_use = 1;
|
|
|
|
dac_audio_start();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dac_audio_release(struct inode *inode, struct file *file)
|
|
{
|
|
dac_audio_sync();
|
|
dac_audio_stop();
|
|
in_use = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct file_operations dac_audio_fops = {
|
|
.read = dac_audio_read,
|
|
.write = dac_audio_write,
|
|
.ioctl = dac_audio_ioctl,
|
|
.open = dac_audio_open,
|
|
.release = dac_audio_release,
|
|
};
|
|
|
|
static irqreturn_t timer1_interrupt(int irq, void *dev, struct pt_regs *regs)
|
|
{
|
|
unsigned long timer_status;
|
|
|
|
timer_status = ctrl_inw(TMU1_TCR);
|
|
timer_status &= ~0x100;
|
|
ctrl_outw(timer_status, TMU1_TCR);
|
|
|
|
if (!empty) {
|
|
sh_dac_output(*buffer_begin, CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
|
|
buffer_begin++;
|
|
|
|
if (buffer_begin == data_buffer + BUFFER_SIZE)
|
|
buffer_begin = data_buffer;
|
|
if (buffer_begin == buffer_end) {
|
|
empty = 1;
|
|
dac_audio_stop_timer();
|
|
}
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __init dac_audio_init(void)
|
|
{
|
|
int retval;
|
|
|
|
if ((device_major = register_sound_dsp(&dac_audio_fops, -1)) < 0) {
|
|
printk(KERN_ERR "Cannot register dsp device");
|
|
return device_major;
|
|
}
|
|
|
|
in_use = 0;
|
|
|
|
data_buffer = (char *)kmalloc(BUFFER_SIZE, GFP_KERNEL);
|
|
if (data_buffer == NULL)
|
|
return -ENOMEM;
|
|
|
|
dac_audio_reset();
|
|
rate = 8000;
|
|
dac_audio_set_rate();
|
|
|
|
retval =
|
|
request_irq(TIMER1_IRQ, timer1_interrupt, SA_INTERRUPT, MODNAME, 0);
|
|
if (retval < 0) {
|
|
printk(KERN_ERR "sh_dac_audio: IRQ %d request failed\n",
|
|
TIMER1_IRQ);
|
|
return retval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit dac_audio_exit(void)
|
|
{
|
|
free_irq(TIMER1_IRQ, 0);
|
|
|
|
unregister_sound_dsp(device_major);
|
|
kfree((void *)data_buffer);
|
|
}
|
|
|
|
module_init(dac_audio_init);
|
|
module_exit(dac_audio_exit);
|
|
|
|
MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");
|
|
MODULE_DESCRIPTION("SH DAC sound driver");
|
|
MODULE_LICENSE("GPL");
|