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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/radio/miropcm20-rds.c
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'drivers/media/radio/miropcm20-rds.c')
-rw-r--r--drivers/media/radio/miropcm20-rds.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/media/radio/miropcm20-rds.c b/drivers/media/radio/miropcm20-rds.c
new file mode 100644
index 000000000000..df79d5e0aaed
--- /dev/null
+++ b/drivers/media/radio/miropcm20-rds.c
@@ -0,0 +1,133 @@
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>
17#include <linux/delay.h>
18#include <asm/uaccess.h>
19#include "miropcm20-rds-core.h"
20
21static char * text_buffer;
22static int rds_users = 0;
23
24
25static int rds_f_open(struct inode *in, struct file *fi)
26{
27 if (rds_users)
28 return -EBUSY;
29
30 rds_users++;
31 if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
32 rds_users--;
33 printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
34 return -ENOMEM;
35 }
36
37 return 0;
38}
39
40static int rds_f_release(struct inode *in, struct file *fi)
41{
42 kfree(text_buffer);
43
44 rds_users--;
45 return 0;
46}
47
48static void print_matrix(char *ch, char out[])
49{
50 int j;
51
52 for (j=7; j>=0; j--) {
53 out[7-j] = ((*ch >> j) & 0x1) + '0';
54 }
55}
56
57static ssize_t rds_f_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
58{
59// i = sprintf(text_buffer, "length: %d, offset: %d\n", length, *offset);
60
61 char c;
62 char bits[8];
63
64 msleep(2000);
65 aci_rds_cmd(RDS_STATUS, &c, 1);
66 print_matrix(&c, bits);
67 if (copy_to_user(buffer, bits, 8))
68 return -EFAULT;
69
70/* if ((c >> 3) & 1) {
71 aci_rds_cmd(RDS_STATIONNAME, text_buffer+1, 8);
72 text_buffer[0] = ' ' ;
73 text_buffer[9] = '\n';
74 return copy_to_user(buffer+8, text_buffer, 10) ? -EFAULT: 18;
75 }
76*/
77/* if ((c >> 6) & 1) {
78 aci_rds_cmd(RDS_PTYTATP, &c, 1);
79 if ( c & 1)
80 sprintf(text_buffer, " M");
81 else
82 sprintf(text_buffer, " S");
83 if ((c >> 1) & 1)
84 sprintf(text_buffer+2, " TA");
85 else
86 sprintf(text_buffer+2, " --");
87 if ((c >> 7) & 1)
88 sprintf(text_buffer+5, " TP");
89 else
90 sprintf(text_buffer+5, " --");
91 sprintf(text_buffer+8, " %2d\n", (c >> 2) & 0x1f);
92 return copy_to_user(buffer+8, text_buffer, 12) ? -EFAULT: 20;
93 }
94*/
95
96 if ((c >> 4) & 1) {
97 aci_rds_cmd(RDS_TEXT, text_buffer, 65);
98 text_buffer[0] = ' ' ;
99 text_buffer[65] = '\n';
100 return copy_to_user(buffer+8, text_buffer,66) ? -EFAULT : 66+8;
101 } else {
102 put_user('\n', buffer+8);
103 return 9;
104 }
105}
106
107static struct file_operations rds_fops = {
108 .owner = THIS_MODULE,
109 .read = rds_f_read,
110 .open = rds_f_open,
111 .release = rds_f_release
112};
113
114static struct miscdevice rds_miscdev = {
115 .minor = MISC_DYNAMIC_MINOR,
116 .name = "radiotext",
117 .devfs_name = "v4l/rds/radiotext",
118 .fops = &rds_fops,
119};
120
121static int __init miropcm20_rds_init(void)
122{
123 return misc_register(&rds_miscdev);
124}
125
126static void __exit miropcm20_rds_cleanup(void)
127{
128 misc_deregister(&rds_miscdev);
129}
130
131module_init(miropcm20_rds_init);
132module_exit(miropcm20_rds_cleanup);
133MODULE_LICENSE("GPL");