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-rw-r--r--package/fonera-mp3-drv/src/mp3_drv.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/package/fonera-mp3-drv/src/mp3_drv.c b/package/fonera-mp3-drv/src/mp3_drv.c
new file mode 100644
index 000000000..f2c0dd166
--- /dev/null
+++ b/package/fonera-mp3-drv/src/mp3_drv.c
@@ -0,0 +1,308 @@
+/*
+* a.lp_mp3 - VS1011B driver for Fonera
+* Copyright (c) 2007 phrozen.org - John Crispin <john@phrozen.org>
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
+*
+* Feedback, Bugs... john@phrozen.org
+*
+*/
+
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/genhd.h>
+
+// do we want debuging info ?
+#if 0
+#define DBG(x) x
+#else
+#define DBG(x)
+#endif
+
+#define MP3_CHUNK_SIZE 4096
+#define MP3_BUFFERING 0
+#define MP3_PLAYING 1
+#define MP3_BUFFER_FINISHED 2
+#define MP3_PLAY_FINISHED 3
+typedef struct _MP3_DATA{
+ unsigned char mp3[MP3_CHUNK_SIZE];
+ unsigned char state;
+} MP3_DATA;
+
+#define IOCTL_MP3_INIT 0x01
+#define IOCTL_MP3_RESET 0x02
+#define IOCTL_MP3_SETVOLUME 0x03
+#define IOCTL_MP3_GETVOLUME 0x04
+
+typedef struct _AUDIO_DATA{
+ unsigned int bitrate;
+ unsigned int sample_rate;
+ unsigned char is_stereo;
+}AUDIO_DATA;
+#define IOCTL_MP3_GETAUDIODATA 0x05
+#define IOCTL_MP3_CLEARBUFFER 0x06
+#define IOCTL_MP3_PLAY 0x07
+
+typedef struct _MP3_BEEP{
+ unsigned char freq;
+ unsigned int ms;
+} MP3_BEEP;
+#define IOCTL_MP3_BEEP 0x08
+#define IOCTL_MP3_END_REACHED 0x09
+#define IOCTL_MP3_BASS 0x10
+
+#define CRYSTAL12288 0x9800
+#define CRYSTAL24576 0x0
+
+#define DEV_NAME "mp3"
+#define DEV_MAJOR 196
+#define MAX_MP3_COUNT 1
+
+typedef struct _mp3_inf{
+ unsigned char is_open;
+} mp3_inf;
+static mp3_inf mp3_info[MAX_MP3_COUNT];
+
+#define MP3_BUFFER_SIZE (128 * 1024)
+unsigned char mp3_buffer[MP3_BUFFER_SIZE];
+
+static unsigned long int mp3_buffer_offset_write = 0;
+static unsigned long int mp3_buffer_offset_read = 0;
+static unsigned char mp3_buffering_status = MP3_BUFFERING;
+static unsigned long int mp3_data_in_buffer = 0;
+static int mp3_thread = 0;
+unsigned int crystal_freq;
+
+#include "vs10xx.c"
+
+static wait_queue_head_t wq;
+static DECLARE_COMPLETION(mp3_exit);
+
+static int mp3_playback_thread(void *data){
+ int j;
+ unsigned long timeout;
+ printk("started kthread\n");
+ daemonize("kmp3");
+ while(mp3_buffering_status != MP3_PLAY_FINISHED){
+ if((mp3_buffering_status == MP3_PLAYING) || (mp3_buffering_status == MP3_BUFFER_FINISHED)){
+ while(VS1011_NEEDS_DATA){
+ if(mp3_buffer_offset_read == MP3_BUFFER_SIZE){
+ mp3_buffer_offset_read = 0;
+ }
+
+ if(mp3_data_in_buffer == 0){
+ if(mp3_buffering_status == MP3_BUFFER_FINISHED){
+ printk("mp3_drv.ko : finished playing\n");
+ mp3_buffering_status = MP3_PLAY_FINISHED;
+ } else {
+ printk("mp3_drv.ko : buffer empty ?\n");
+ if(mp3_buffering_status != MP3_PLAY_FINISHED){
+ }
+ }
+ } else {
+ for(j = 0; j < 32; j++){
+ VS1011_send_SDI(mp3_buffer[mp3_buffer_offset_read + j]);
+ }
+ mp3_buffer_offset_read += 32;
+ mp3_data_in_buffer -= 32;
+ }
+ }
+ }
+ timeout = 1;
+ timeout = wait_event_interruptible_timeout(wq, (timeout==0), timeout);
+ }
+ complete_and_exit(&mp3_exit, 0);
+}
+
+static ssize_t module_write(struct file * file, const char * buffer, size_t count, loff_t *offset){
+ MP3_DATA mp3_data;
+
+ copy_from_user((char*) &mp3_data, buffer, sizeof(MP3_DATA));
+
+ if(mp3_data.state == MP3_BUFFER_FINISHED){
+ mp3_buffering_status = MP3_BUFFER_FINISHED;
+ DBG(printk("mp3_drv.ko : file end reached\n"));
+ return 1;
+ }
+
+ if(mp3_data.state == MP3_PLAY_FINISHED){
+ mp3_buffering_status = MP3_PLAY_FINISHED;
+ mp3_data_in_buffer = 0;
+ DBG(printk("mp3_drv.ko : stop playing\n"));
+ return 1;
+ }
+
+ if(mp3_data_in_buffer + MP3_CHUNK_SIZE >= MP3_BUFFER_SIZE){
+ DBG(printk("mp3_drv.ko : buffer is full? %ld\n", mp3_data_in_buffer);)
+ return 0;
+ }
+
+ if(mp3_buffer_offset_write == MP3_BUFFER_SIZE){
+ mp3_buffer_offset_write = 0;
+ }
+
+ memcpy(&mp3_buffer[mp3_buffer_offset_write], mp3_data.mp3, MP3_CHUNK_SIZE);
+ mp3_buffer_offset_write += MP3_CHUNK_SIZE;
+ mp3_buffering_status = mp3_data.state;
+ mp3_data_in_buffer += MP3_CHUNK_SIZE;
+ return 1;
+}
+
+static int module_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg){
+ unsigned int retval = 0;
+ AUDIO_DATA audio_data;
+ MP3_BEEP mp3_beep;
+ DBG(printk("mp3_drv.ko : Ioctl Called (cmd=%d)\n", cmd );)
+ switch (cmd) {
+ case IOCTL_MP3_INIT:
+ crystal_freq = arg;
+ VS1011_init(crystal_freq, 1);
+ VS1011_print_registers();
+ break;
+
+ case IOCTL_MP3_RESET:
+ DBG(printk("mp3_drv.ko : doing a sw reset\n");)
+ VS1011_init(crystal_freq, 0);
+ VS1011_print_registers();
+ VS1011_send_zeros(0x20);
+ break;
+
+ case IOCTL_MP3_SETVOLUME:
+ DBG(printk("mp3_drv.ko : setting volume to : %lu\n", arg&0xffff);)
+ VS1011_set_volume(arg);
+ break;
+
+ case IOCTL_MP3_GETVOLUME:
+ retval = VS1011_get_volume();
+ DBG(printk("mp3_drv.ko : read volume : %d\n", retval);)
+ break;
+
+ case IOCTL_MP3_GETAUDIODATA:
+ DBG(printk("mp3_drv.ko : read audio data\n");)
+ VS1011_get_audio_data(&audio_data);
+ copy_to_user((char*)arg, (char*)&audio_data, sizeof(AUDIO_DATA));
+ break;
+
+ case IOCTL_MP3_CLEARBUFFER:
+ DBG(printk("mp3_drv.ko : clearing buffer\n");)
+ mp3_buffer_offset_read = 0;
+ mp3_buffer_offset_write = 0;
+ mp3_buffering_status = MP3_PLAY_FINISHED;
+ mp3_data_in_buffer = 0;
+ break;
+
+ case IOCTL_MP3_PLAY:
+ mp3_thread = kernel_thread(mp3_playback_thread, NULL, CLONE_KERNEL);
+ break;
+
+ case IOCTL_MP3_BEEP:
+ copy_from_user((char*)&mp3_beep, (char*)arg, sizeof(MP3_BEEP));
+ VS1011_sine(1,mp3_beep.freq);
+ msDelay(mp3_beep.ms);
+ VS1011_sine(0,0);
+ break;
+
+ case IOCTL_MP3_END_REACHED:
+ if(mp3_buffering_status == MP3_PLAY_FINISHED){
+ retval = 1;
+ }
+ break;
+
+ case IOCTL_MP3_BASS:
+ VS1011_set_bass(arg);
+ break;
+
+ default:
+ printk("mp3_drv.ko : unknown ioctl\n");
+ break;
+
+ }
+ return retval;
+}
+
+static int module_open(struct inode *inode, struct file *file){
+ unsigned int dev_minor = MINOR(inode->i_rdev);
+ if(dev_minor != 0){
+ printk("mp3_drv.ko : trying to access unknown minor device -> %d\n", dev_minor);
+ return -ENODEV;
+ }
+ if(mp3_info[dev_minor].is_open) {
+ printk("mp3_drv.ko : Device with minor ID %d already in use\n", dev_minor);
+ return -EBUSY;
+ }
+ mp3_info[dev_minor].is_open = 1;
+
+ mp3_buffering_status = MP3_PLAY_FINISHED;
+ printk("mp3_drv.ko : Minor %d has been opened\n", dev_minor);
+ return 0;
+}
+
+static int module_close(struct inode * inode, struct file * file){
+ unsigned int dev_minor = MINOR(inode->i_rdev);
+ mp3_info[dev_minor].is_open = 0;
+ printk("mp3_drv.ko : Minor %d has been closed\n", dev_minor);
+ mp3_buffering_status = MP3_PLAY_FINISHED;
+ return 0;
+}
+
+struct file_operations modulemp3_fops = {
+ write: module_write,
+ ioctl: module_ioctl,
+ open: module_open,
+ release: module_close
+};
+
+static int __init mod_init(void){
+ printk("mp3_drv.ko : VS1011b Driver\n");
+ printk("mp3_drv.ko : Made by John '2B|!2B' Crispin (john@phrozen.org)\n");
+ printk("mp3_drv.ko : Starting ...\n");
+
+ if(register_chrdev(DEV_MAJOR, DEV_NAME, &modulemp3_fops)) {
+ printk( "mp3_drv.ko : Error whilst opening %s (%d)\n", DEV_NAME, DEV_MAJOR);
+ return( -ENODEV );
+ }
+
+ mp3_info[0].is_open = 0;
+ printk("mp3_drv.ko : Device %s registered for major ID %d\n", DEV_NAME, DEV_MAJOR);
+ crystal_freq = CRYSTAL12288;
+ VS1011_init(crystal_freq, 1);
+ VS1011_print_registers();
+ printk("end of init\n");
+ init_waitqueue_head(&wq);
+ printk("wait queue started\n");
+ return 0;
+}
+
+static void __exit mod_exit(void){
+ printk( "mp3_drv.ko : Cleanup\n" );
+ unregister_chrdev(DEV_MAJOR, DEV_NAME);
+}
+
+module_init (mod_init);
+module_exit (mod_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("K. John '2B|!2B' Crispin");
+MODULE_DESCRIPTION("vs1011 Driver for Fox Board");
+
+
+
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