mrobe 100: real time clock (if anybody recognises the RTC chip let me know)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16208 a1c6a512-1295-4272-9138-f99709370657

firmware/SOURCES

@@ -148,6 +148,8 @@ drivers/rtc/rtc_s3c2440.c
 drivers/rtc/rtc_as3514.c
 #elif (CONFIG_RTC == RTC_RX5X348AB)
 drivers/rtc/rtc_rx5x348ab.c
+#elif (CONFIG_RTC == RTC_MR100)
+drivers/rtc/rtc_mr100.c
 #endif /* (CONFIG_RTC == RTC_) */
 #endif /* SIMULATOR */
 
@@ -523,12 +525,12 @@ target/coldfire/iriver/audio-iriver.c
 
 #ifdef IRIVER_H100_SERIES
 #ifndef SIMULATOR
+drivers/sw_i2c.c
 target/coldfire/ata-as-coldfire.S
 target/coldfire/iriver/ata-iriver.c
 target/coldfire/iriver/lcd-remote-iriver.c
 target/coldfire/iriver/system-iriver.c
 target/coldfire/iriver/fmradio_i2c-iriver.c
-target/coldfire/iriver/h100/sw_i2c-h100.c
 target/coldfire/iriver/h100/adc-h100.c
 target/coldfire/iriver/h100/backlight-h100.c
 target/coldfire/iriver/h100/button-h100.c
@@ -661,6 +663,7 @@ target/arm/tms320dm320/dsp-dm320.c
 
 #ifdef MROBE_100
 #ifndef SIMULATOR
+drivers/sw_i2c.c
 target/arm/ata-as-arm.S
 target/arm/ata-pp5020.c
 target/arm/wmcodec-pp.c

firmware/drivers/rtc/rtc_mr100.c

@@ -0,0 +1,114 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Robert Kukla 
+ * 
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "rtc.h" 
+#include "logf.h"
+#include "sw_i2c.h"
+#include "i2c-pp.h"
+
+/* The RTC chip is unknown, the information about it was gathered by 
+ * reverse engineering the bootloader.
+ */
+
+#define RTC_ADDR   0x60
+
+#define RTC_CMD_CTRL 0 /* OF uses it with single byte 1 or 2 */
+#define RTC_CMD_UNKN 1 /* OF uses it with single byte 8 */
+#define RTC_CMD_DATA 2
+#define RTC_CMD_TEST 7 /* OF uses it with single byte 0xAA */
+
+/* private */
+
+static void reverse_bits(unsigned char* v, int size) {
+
+    int i,j,in,out=0;
+
+    for(j=0; j<size; j++) {   
+        in = v[j];
+        for(i=0; i<8; i++) {
+           out |= (in & 1);
+           in  = in >>1;
+           out = out<<1;
+        }   
+        v[j] = out>>1;
+    }   
+}    
+
+static int sw_i2c(int access, unsigned char chip, unsigned char cmd, 
+                              unsigned char* buf, int count) {
+    int i;
+
+    i2c_lock();
+    GPIOC_ENABLE |=  0x00000030;
+
+    chip|=cmd<<1;
+
+    if(access == SW_I2C_READ) {
+        i = sw_i2c_read(chip, 0, buf, count);
+        reverse_bits(buf, count);
+    } else {
+        reverse_bits(buf, count);
+        i = sw_i2c_write(chip, 0, buf, count);
+    }    
+
+    GPIOC_ENABLE &= ~0x00000030;
+    i2c_unlock();
+    
+    return i;
+}
+
+/* public */
+
+void rtc_init(void)
+{
+    sw_i2c_init();
+
+    /* to set a time while buttons are stil not working
+    unsigned char v[7] = {0x00,0x47,0x17,0x06,0x03,0x02,0x08};
+    rtc_write_datetime(v);
+    */
+}
+
+int rtc_read_datetime(unsigned char* buf)
+{
+    int i;
+    unsigned char v[7];
+
+    i = sw_i2c(SW_I2C_READ, RTC_ADDR, RTC_CMD_DATA, v, 7);
+
+    v[4] &= 0x3f; /* mask out p.m. flag */
+    
+    for(i=0; i<7; i++) 
+        buf[i] = v[6-i];
+    
+    return i;
+}
+
+int rtc_write_datetime(unsigned char* buf)
+{
+    int i;
+    unsigned char v[7];
+
+    for(i=0; i<7; i++) 
+        v[i]=buf[6-i];
+        
+    i = sw_i2c(SW_I2C_WRITE, RTC_ADDR, RTC_CMD_DATA, v, 7);
+    
+    return i;
+}
+

firmware/drivers/sw_i2c.c

@@ -24,11 +24,30 @@
 
 /**
  * I2C-functions are copied and ported from fmradio.c.
- * later fixed, adapted and moved to a seperate file so they can be re-used by the rtc-ds1339c code by Robert Kukla
+ * later fixed, adapted and moved to a seperate file so they can be re-used 
+ * by the rtc-ds1339c and later by the m:robe-100 code by Robert Kukla
  */
 
 /* cute little functions, atomic read-modify-write */
 
+#ifdef MROBE_100
+
+/* SCL is GPIOC, 4 */
+#define SCL       (GPIOC_INPUT_VAL &  0x00000010)
+#define SCL_OUT_LO GPIOC_OUTPUT_VAL&=~0x00000010
+#define SCL_LO     GPIOC_OUTPUT_EN |= 0x00000010
+#define SCL_HI     GPIOC_OUTPUT_EN &=~0x00000010
+
+/* SDA is GPIOC, 5 */
+#define SDA       (GPIOC_INPUT_VAL &  0x00000020)
+#define SDA_OUT_LO GPIOC_OUTPUT_VAL&=~0x00000020
+#define SDA_LO     GPIOC_OUTPUT_EN |= 0x00000020
+#define SDA_HI     GPIOC_OUTPUT_EN &=~0x00000020
+
+#define DELAY  do { volatile int _x; for(_x=0;_x<22;_x++);} while(0)
+
+#else
+
 /* SCL is GPIO, 12 */
 #define SCL             ( 0x00001000 & GPIO_READ)
 #define SCL_OUT_LO and_l(~0x00001000, &GPIO_OUT)
@@ -54,10 +73,15 @@
         );                            \
     })
 
+#endif
+
 void sw_i2c_init(void)
 {
+#ifndef MROBE_100
     or_l(0x00001000, &GPIO_FUNCTION);
     or_l(0x00002000, &GPIO1_FUNCTION);
+#endif
+  
     SDA_HI;
     SCL_HI;
     SDA_OUT_LO;
@@ -192,7 +216,7 @@ static unsigned char sw_i2c_inb(void)
     return byte;
 }
 
-int sw_i2c_write(unsigned char chip, unsigned char location, const unsigned char* buf, int count)
+int sw_i2c_write(unsigned char chip, unsigned char location, unsigned char* buf, int count)
 {
     int i;
 
@@ -204,12 +228,16 @@ int sw_i2c_write(unsigned char chip, unsigned char location, const unsigned char
         return -1;
     }
 
+#ifdef MROBE_100 /* does not use register addressing */
+    (void) location;
+#else    
     sw_i2c_outb(location);
     if (!sw_i2c_getack())
     {
         sw_i2c_stop();
         return -2;
     }
+#endif  
 
     for (i=0; i<count; i++)
     {
@@ -230,6 +258,9 @@ int sw_i2c_read(unsigned char chip, unsigned char location, unsigned char* buf,
 {
     int i;
 
+#ifdef MROBE_100 /* does not use register addressing */
+    (void) location;
+#else    
     sw_i2c_start();
     sw_i2c_outb((chip & 0xfe) | SW_I2C_WRITE);
     if (!sw_i2c_getack())
@@ -244,6 +275,7 @@ int sw_i2c_read(unsigned char chip, unsigned char location, unsigned char* buf,
         sw_i2c_stop();
         return -2;
     }
+#endif  
 
     sw_i2c_start();
     sw_i2c_outb((chip & 0xfe) | SW_I2C_READ);

firmware/export/config-mrobe100.h

@@ -43,7 +43,7 @@
 
 /* define this if you have a real-time clock */
 #ifndef BOOTLOADER
-//#define CONFIG_RTC RTC_E8564
+#define CONFIG_RTC RTC_MR100
 #endif
 
 /* Define this if you have a software controlled poweroff */

firmware/export/config.h

@@ -161,6 +161,7 @@
 #define RTC_RX5X348AB 9
 #define RTC_TCC77X   10
 #define RTC_TCC780X  11
+#define RTC_MR100  12
 
 /* USB On-the-go */
 #define USBOTG_ISP1362 1362 /* iriver H300 */

firmware/export/sw_i2c.h

@@ -24,7 +24,7 @@
 #define SW_I2C_READ  1
 
 void sw_i2c_init(void);
-int sw_i2c_write(unsigned char chip, unsigned char location, const unsigned char* buf, int count);
+int sw_i2c_write(unsigned char chip, unsigned char location, unsigned char* buf, int count);
 int sw_i2c_read (unsigned char chip, unsigned char location, unsigned char* buf, int count);
 
 #endif