Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/sound/oss/sh_dac_audio.c b/sound/oss/sh_dac_audio.c
new file mode 100644
index 0000000..c09cdee
--- /dev/null
+++ b/sound/oss/sh_dac_audio.c
@@ -0,0 +1,325 @@
+#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");