From fd11471a3f9bfbb5f5bdf22866e861bae56ad8ea Mon Sep 17 00:00:00 2001
From: Maurus Cuelenaere <mcuelenaere@gmail.com>
Date: Mon, 1 Jun 2009 21:00:31 +0000
Subject: Onda VX747: try at implementing FM tuner support

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21160 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c | 40 +++++++++++++-----------
 1 file changed, 22 insertions(+), 18 deletions(-)

(limited to 'firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c')

diff --git a/firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c b/firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c
index 5df0e90683..79968889b9 100644
--- a/firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/i2c-jz4740.c
@@ -20,6 +20,10 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
+#include "config.h"
+#include "system.h"
+#include "jz4740.h"
+#include "logf.h"
 
 /*
  * Jz4740 I2C routines.
@@ -42,15 +46,9 @@
  *
  */
 
-#include "config.h"
-#include "system.h"
-#include "jz4740.h"
-#include "logf.h"
-
-
 /* I2C protocol */
 #define I2C_READ    1
-#define I2C_WRITE    0
+#define I2C_WRITE   0
 
 #define TIMEOUT     1000
 
@@ -84,7 +82,7 @@ static int i2c_put_data_nack(unsigned char data)
     while (__i2c_check_drf() != 0);
     while (!__i2c_transmit_ended());
     while (timeout--);
-    
+
     return 0;
 }
 #endif
@@ -121,13 +119,13 @@ void i2c_setclk(unsigned int i2cclk)
 /*
  * I2C interface
  */
-void i2c_open(void)
+static void i2c_open(void)
 {
     i2c_setclk(10000); /* default 10 KHz */
     __i2c_enable();
 }
 
-void i2c_close(void)
+static void i2c_close(void)
 {
     udelay(300); /* wait for STOP goes over. */
     __i2c_disable();
@@ -137,21 +135,23 @@ int i2c_read(int device, unsigned char *buf, int count)
 {
     int cnt = count;
     int timeout = 5;
-    
+
     device &= 0xFF;
 
+    i2c_open();
+
 L_try_again:
     if (timeout < 0)
         goto L_timeout;
 
     __i2c_send_nack();    /* Master does not send ACK, slave sends it */
-    
+
     __i2c_send_start();
     if (i2c_put_data( (device << 1) | I2C_READ ) < 0)
         goto device_err;
-    
+
     __i2c_send_ack();    /* Master sends ACK for continue reading */
-    
+
     while (cnt)
     {
         if (cnt == 1)
@@ -170,7 +170,7 @@ L_try_again:
 
     __i2c_send_stop();
     return count - cnt;
-    
+
 device_err:
     timeout--;
     __i2c_send_stop();
@@ -179,6 +179,7 @@ device_err:
 L_timeout:
     __i2c_send_stop();
     logf("Read I2C device 0x%2x failed.", device);
+    i2c_close();
     return -1;
 }
 
@@ -186,9 +187,11 @@ int i2c_write(int device, unsigned char *buf, int count)
 {
     int cnt = count;
     int timeout = 5;
-    
+
     device &= 0xFF;
 
+    i2c_open();
+
     __i2c_send_nack();    /* Master does not send ACK, slave sends it */
 
 W_try_again:
@@ -200,7 +203,7 @@ W_try_again:
     __i2c_send_start();
     if (i2c_put_data( (device << 1) | I2C_WRITE ) < 0)
         goto device_err;
-    
+
 #if 0 //CONFIG_JZ_TPANEL_ATA2508
     if (address == 0xff)
     {
@@ -226,7 +229,7 @@ W_try_again:
 
     __i2c_send_stop();
     return count - cnt;
-    
+
 device_err:
     timeout--;
     __i2c_send_stop();
@@ -235,6 +238,7 @@ device_err:
 W_timeout:
     logf("Write I2C device 0x%2x failed.", device);
     __i2c_send_stop();
+    i2c_close();
     return -1;
 }
 
-- 
cgit v1.2.3