[mirror_ubuntu-artful-kernel.git] / drivers / media / radio / miropcm20-rds.c

/* MiroSOUND PCM20 radio rds interface driver
 * (c) 2001 Robert Siemer <Robert.Siemer@gmx.de>
 * Thanks to Fred Seidel. See miropcm20-rds-core.c for further information.
 */

/* Revision history:
 *
 *   2001-04-18  Robert Siemer <Robert.Siemer@gmx.de>
 *        separate file for user interface driver
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/sched.h>	/* current, TASK_*, schedule_timeout() */
#include <linux/delay.h>
#include <asm/uaccess.h>
#include "miropcm20-rds-core.h"

static char * text_buffer;
static int rds_users = 0;


static int rds_f_open(struct inode *in, struct file *fi)
{
	if (rds_users)
		return -EBUSY;

	rds_users++;
	if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
		rds_users--;
		printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
		return -ENOMEM;
	}

	return 0;
}

static int rds_f_release(struct inode *in, struct file *fi)
{
	kfree(text_buffer);

	rds_users--;
	return 0;
}

static void print_matrix(char *ch, char out[])
{
        int j;

	for (j=7; j>=0; j--) {
		 out[7-j] = ((*ch >> j) & 0x1) + '0';
	}
}

static ssize_t rds_f_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
{
//	i = sprintf(text_buffer, "length: %d, offset: %d\n", length, *offset);

	char c;
	char bits[8];

	msleep(2000);
	aci_rds_cmd(RDS_STATUS, &c, 1);
	print_matrix(&c, bits);
	if (copy_to_user(buffer, bits, 8))
		return -EFAULT;

/*	if ((c >> 3) & 1) {
		aci_rds_cmd(RDS_STATIONNAME, text_buffer+1, 8);
		text_buffer[0]  = ' ' ;
		text_buffer[9]  = '\n';
		return copy_to_user(buffer+8, text_buffer, 10) ? -EFAULT: 18;
	}
*/
/*	if ((c >> 6) & 1) {
		aci_rds_cmd(RDS_PTYTATP, &c, 1);
		if ( c & 1)
			sprintf(text_buffer, " M");
		else
			sprintf(text_buffer, " S");
		if ((c >> 1) & 1)
			sprintf(text_buffer+2, " TA");
		else
			sprintf(text_buffer+2, " --");
		if ((c >> 7) & 1)
			sprintf(text_buffer+5, " TP");
		else
			sprintf(text_buffer+5, " --");
		sprintf(text_buffer+8, " %2d\n", (c >> 2) & 0x1f);
		return copy_to_user(buffer+8, text_buffer, 12) ? -EFAULT: 20;
	}
*/

	if ((c >> 4) & 1) {
		aci_rds_cmd(RDS_TEXT, text_buffer, 65);
		text_buffer[0]  = ' ' ;
		text_buffer[65] = '\n';
		return copy_to_user(buffer+8, text_buffer,66) ? -EFAULT : 66+8;
	} else {
		put_user('\n', buffer+8);
		return 9;
	}
}

static struct file_operations rds_fops = {
	.owner		= THIS_MODULE,
	.read		= rds_f_read,
	.open		= rds_f_open,
	.release	= rds_f_release
};

static struct miscdevice rds_miscdev = {
	.minor		= MISC_DYNAMIC_MINOR,
	.name		= "radiotext",
	.devfs_name	= "v4l/rds/radiotext",
	.fops		= &rds_fops,
};

static int __init miropcm20_rds_init(void)
{
	return misc_register(&rds_miscdev);
}

static void __exit miropcm20_rds_cleanup(void)
{
	misc_deregister(&rds_miscdev);
}

module_init(miropcm20_rds_init);
module_exit(miropcm20_rds_cleanup);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* MiroSOUND PCM20 radio rds interface driver
	2	* (c) 2001 Robert Siemer <Robert.Siemer@gmx.de>
	3	* Thanks to Fred Seidel. See miropcm20-rds-core.c for further information.
	4	*/
	5
	6	/* Revision history:
	7	*
	8	* 2001-04-18 Robert Siemer <Robert.Siemer@gmx.de>
	9	* separate file for user interface driver
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/slab.h>
	15	#include <linux/fs.h>
	16	#include <linux/miscdevice.h>
4e57b681	17	#include <linux/sched.h> /* current, TASK_, schedule_timeout() /
1da177e4 LT	18	#include <linux/delay.h>
	19	#include <asm/uaccess.h>
	20	#include "miropcm20-rds-core.h"
	21
	22	static char * text_buffer;
	23	static int rds_users = 0;
	24
	25
	26	static int rds_f_open(struct inode in, struct file fi)
	27	{
	28	if (rds_users)
	29	return -EBUSY;
	30
	31	rds_users++;
	32	if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
	33	rds_users--;
	34	printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
	35	return -ENOMEM;
	36	}
	37
	38	return 0;
	39	}
	40
	41	static int rds_f_release(struct inode in, struct file fi)
	42	{
	43	kfree(text_buffer);
	44
	45	rds_users--;
	46	return 0;
	47	}
	48
	49	static void print_matrix(char *ch, char out[])
	50	{
	51	int j;
	52
	53	for (j=7; j>=0; j--) {
	54	out[7-j] = ((*ch >> j) & 0x1) + '0';
	55	}
	56	}
	57
	58	static ssize_t rds_f_read(struct file file, char __user buffer, size_t length, loff_t *offset)
	59	{
	60	// i = sprintf(text_buffer, "length: %d, offset: %d\n", length, *offset);
	61
	62	char c;
	63	char bits[8];
	64
	65	msleep(2000);
	66	aci_rds_cmd(RDS_STATUS, &c, 1);
	67	print_matrix(&c, bits);
	68	if (copy_to_user(buffer, bits, 8))
	69	return -EFAULT;
	70
	71	/* if ((c >> 3) & 1) {
	72	aci_rds_cmd(RDS_STATIONNAME, text_buffer+1, 8);
	73	text_buffer[0] = ' ' ;
	74	text_buffer[9] = '\n';
	75	return copy_to_user(buffer+8, text_buffer, 10) ? -EFAULT: 18;
	76	}
	77	*/
	78	/* if ((c >> 6) & 1) {
	79	aci_rds_cmd(RDS_PTYTATP, &c, 1);
	80	if ( c & 1)
	81	sprintf(text_buffer, " M");
82	else
83	sprintf(text_buffer, " S");
84	if ((c >> 1) & 1)
85	sprintf(text_buffer+2, " TA");
86	else
87	sprintf(text_buffer+2, " --");
88	if ((c >> 7) & 1)
89	sprintf(text_buffer+5, " TP");
90	else
91	sprintf(text_buffer+5, " --");
92	sprintf(text_buffer+8, " %2d\n", (c >> 2) & 0x1f);
93	return copy_to_user(buffer+8, text_buffer, 12) ? -EFAULT: 20;
94	}
95	*/
96
97	if ((c >> 4) & 1) {
98	aci_rds_cmd(RDS_TEXT, text_buffer, 65);
99	text_buffer[0] = ' ' ;
100	text_buffer[65] = '\n';
101	return copy_to_user(buffer+8, text_buffer,66) ? -EFAULT : 66+8;
102	} else {
103	put_user('\n', buffer+8);
104	return 9;
105	}
106	}
107
108	static struct file_operations rds_fops = {
109	.owner = THIS_MODULE,
110	.read = rds_f_read,
111	.open = rds_f_open,
112	.release = rds_f_release
113	};
114
115	static struct miscdevice rds_miscdev = {
116	.minor = MISC_DYNAMIC_MINOR,
117	.name = "radiotext",
118	.devfs_name = "v4l/rds/radiotext",
119	.fops = &rds_fops,
120	};
121
122	static int __init miropcm20_rds_init(void)
123	{
124	return misc_register(&rds_miscdev);
125	}
126
127	static void __exit miropcm20_rds_cleanup(void)
128	{
129	misc_deregister(&rds_miscdev);
130	}
131
132	module_init(miropcm20_rds_init);
133	module_exit(miropcm20_rds_cleanup);
134	MODULE_LICENSE("GPL");