added libjson-c. added driver, webinterface and userspace daemon for the fonera mp3-hack

SVN-Revision: 8509

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 0000000000..f2c0dd1664
--- /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");
+
+
+