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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
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 00000000000..df79d5e0aae
--- /dev/null
+++ b/drivers/media/radio/miropcm20-rds.c
@@ -0,0 +1,133 @@
+/* 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/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");