patch-2.4.6 linux/drivers/media/radio/rds-miropcm20.c
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- Lines: 250
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.5/linux/drivers/media/radio/rds-miropcm20.c
- Orig date:
Fri Apr 13 20:26:07 2001
diff -u --recursive --new-file v2.4.5/linux/drivers/media/radio/rds-miropcm20.c linux/drivers/media/radio/rds-miropcm20.c
@@ -1,249 +0,0 @@
-/*
- * Many thanks to Fred Seidel <seidel@metabox.de>, the
- * designer of the RDS decoder hardware. With his help
- * I was able to code this driver.
- * Thanks also to Norberto Pellicci, Dominic Mounteney
- * <DMounteney@pinnaclesys.com> and www.teleauskunft.de
- * for good hints on finding Fred. It was somewhat hard
- * to locate him here in Germany... [:
- *
- * Revision history:
- *
- * 2000-08-09 Robert Siemer <Robert.Siemer@gmx.de>
- * RDS support for MiroSound PCM20 radio
- */
-
-#define _NO_VERSION_
-
-/* #include <linux/kernel.h> */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <asm/semaphore.h>
-#include <asm/io.h>
-#include "../../sound/aci.h"
-
-#define WATCHMASK 0352 /* 11101010 */
-
-#define DEBUG 0
-
-static struct semaphore aci_rds_sem;
-
-
-#define RDS_BUSYMASK 0x10 /* Bit 4 */
-#define RDS_CLOCKMASK 0x08 /* Bit 3 */
-#define RDS_DATAMASK 0x04 /* Bit 2 */
-
-
-static void print_matrix(char array[], unsigned int length)
-{
- int i, j;
-
- for (i=0; i<length; i++) {
- printk("aci-rds: ");
- for (j=7; j>=0; j--) {
- printk("%d", (array[i] >> j) & 0x1);
- }
- if (i%8 == 0)
- printk(" byte-border\n");
- else
- printk("\n");
- }
-}
-
-static int byte2trans(unsigned char byte, unsigned char sendbuffer[], int size)
-{
- int i;
-
- if (size != 8)
- return -1;
- for (i = 7; i >= 0; i--)
- sendbuffer[7-i] = (byte & (1 << i)) ? RDS_DATAMASK : 0;
- sendbuffer[0] |= RDS_CLOCKMASK;
-
- return 0;
-}
-
-static int trans2byte(unsigned char buffer[], int size)
-{
- int i;
- unsigned char byte=0;
-
- if (size != 8)
- return -1;
- for (i = 7; i >= 0; i--)
- byte |= ((buffer[7-i] & RDS_DATAMASK) ? 1 : 0) << i;
-
- return byte;
-}
-
-static int trans2data(unsigned char readbuffer[], int readsize, unsigned char data[], int datasize)
-{
- int i,j;
-
- if (readsize != datasize*8)
- return -1;
- for (i = 0; i < datasize; i++)
- if ((j=trans2byte(&readbuffer[i*8], 8)) < 0)
- return -1;
- else
- data[i]=j;
- return 0;
-}
-
-static int rds_waitread(void)
-{
- unsigned char byte;
- int i=2000;
-
- do {
- byte=inb(RDS_REGISTER);
- if ((byte & WATCHMASK) != WATCHMASK)
- printk("aci-rds: Hidden information discoverd!\n");
- i--;
- }
- while ((byte & RDS_BUSYMASK) && i);
-
- if (i) {
-#if DEBUG
- printk("rds_waitread()");
- print_matrix(&byte, 1);
-#endif
- return (byte);
- } else {
- printk("aci-rds: rds_waitread() timeout...\n");
- return -1;
- }
-}
-
-/* dont use any ..._nowait() function if you are not sure what you do... */
-
-static inline void rds_rawwrite_nowait(unsigned char byte)
-{
-#if DEBUG
- printk("rds_rawwrite()");
- print_matrix(&byte, 1);
-#endif
- outb(byte, RDS_REGISTER);
-}
-
-static int rds_rawwrite(unsigned char byte)
-{
- if (rds_waitread() >= 0) {
- rds_rawwrite_nowait(byte);
- return 0;
- } else
- return -1;
-}
-
-static int rds_write(unsigned char cmd)
-{
- unsigned char sendbuffer[8];
- int i;
-
- if (byte2trans(cmd, sendbuffer, 8) != 0){
- return -1;
- } else {
- for (i=0; i<8; i++) {
- rds_rawwrite(sendbuffer[i]);
- }
- }
- return 0;
-}
-
-static int rds_readcycle_nowait(void)
-{
- rds_rawwrite_nowait(0);
- return rds_waitread();
-}
-
-static int rds_readcycle(void)
-{
- if (rds_rawwrite(0) < 0)
- return -1;
- return rds_waitread();
-}
-
-static int rds_read(unsigned char databuffer[], int datasize)
-{
-
-#define READSIZE (8*datasize)
-
- int i,j;
- unsigned char* readbuffer;
-
- if (!datasize) /* nothing to read */
- return 0;
-
- /* to be able to use rds_readcycle_nowait()
- I have to readwait() here */
- if (rds_waitread() < 0)
- return -1;
-
- if ((readbuffer=kmalloc(READSIZE, GFP_KERNEL)) == 0) {
- printk("aci-rds: Out of memory...\n");
- return -ENOMEM;
- } else {
- if (signal_pending(current)) {
- kfree(readbuffer);
- return -EINTR;
- }
- }
-
- for (i=0; i< READSIZE; i++)
- if((j=rds_readcycle_nowait()) < 0) {
- kfree(readbuffer);
- return -1;
- } else
- readbuffer[i]=j;
- if (trans2data(readbuffer, READSIZE, databuffer, datasize) < 0) {
- kfree(readbuffer);
- return -1;
- }
- kfree(readbuffer);
- return 0;
-}
-
-static int rds_ack(void)
-{
- int i=rds_readcycle();
-
- if (i < 0)
- return -1;
- if (i & RDS_DATAMASK) {
- return 0; /* ACK */
- } else {
- return 1; /* NACK */
- }
-}
-
-int aci_rds_cmd(unsigned char cmd, unsigned char databuffer[], int datasize)
-{
- int ret;
-
- if (down_interruptible(&aci_rds_sem))
- return -EINTR;
-
- if (rds_write(cmd))
- ret = -2;
-
- /* RDS_RESET doesn't need further processing */
- if (cmd!=RDS_RESET && (rds_ack() || rds_read(databuffer, datasize)))
- ret = -1;
- else
- ret = 0;
-
- up(&aci_rds_sem);
-
- return ret;
-}
-
-int __init attach_aci_rds(void)
-{
- init_MUTEX(&aci_rds_sem);
- return 0;
-}
-
-void __exit unload_aci_rds(void)
-{
-}
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