Add I2C and RTC support for RMU board using software I2C driver

(because of better response to iprobe command); fix problem with
"reset" command

diff --git a/CHANGELOG b/CHANGELOG
index 3bb17eb..f49ddb9 100644 (file)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,10 @@
 Changes for U-Boot 0.4.7:
 ======================================================================
 
+* Add I2C and RTC support for RMU board using software I2C driver
+  (because of better response to iprobe command); fix problem with
+  "reset" command
+
 * Patch by Matthias Fuchs, 28 Aug 2003:
   Added CONFIG_BOOTP_DNS2 and CONFIG_BOOTP_SEND_HOSTNAME to
   CONFIG_BOOTP_MAKS (see README).

diff --git a/include/configs/rmu.h b/include/configs/rmu.h
index 7b33c7e..c0c4083 100644 (file)
--- a/include/configs/rmu.h
+++ b/include/configs/rmu.h
@@ -61,8 +61,39 @@
 #define CONFIG_LOADS_ECHO      1       /* echo on for serial download  */
 #undef CFG_LOADS_BAUD_CHANGE           /* don't allow baudrate change  */
 
+/* enable I2C and select the hardware/software driver */
+#undef CONFIG_HARD_I2C                 /* I2C with hardware support    */
+#define CONFIG_SOFT_I2C                1       /* I2C bit-banged               */
+
+#define CFG_I2C_SPEED          40000   /* 40 kHz is supposed to work   */
+#define CFG_I2C_SLAVE          0xFE
+
+/* Software (bit-bang) I2C driver configuration */
+#define PB_SCL         0x00000020      /* PB 26 */
+#define PB_SDA         0x00000010      /* PB 27 */
+
+#define I2C_INIT       (immr->im_cpm.cp_pbdir |=  PB_SCL)
+#define I2C_ACTIVE     (immr->im_cpm.cp_pbdir |=  PB_SDA)
+#define I2C_TRISTATE   (immr->im_cpm.cp_pbdir &= ~PB_SDA)
+#define I2C_READ       ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
+#define I2C_SDA(bit)   if(bit) immr->im_cpm.cp_pbdat |=  PB_SDA; \
+                       else    immr->im_cpm.cp_pbdat &= ~PB_SDA
+#define I2C_SCL(bit)   if(bit) immr->im_cpm.cp_pbdat |=  PB_SCL; \
+                       else    immr->im_cpm.cp_pbdat &= ~PB_SCL
+#define I2C_DELAY      udelay(5)       /* 1/4 I2C clock duration */
+
+/* M41T11 Serial Access Timekeeper(R) SRAM */
+#define CONFIG_RTC_M41T11 1
+#define CFG_I2C_RTC_ADDR 0x68
+#define CFG_M41T11_BASE_YEAR 1900      /* play along with the linux driver */
+
 #undef CONFIG_WATCHDOG                 /* watchdog disabled            */
 
+#define CONFIG_COMMANDS              ( CONFIG_CMD_DFL  | \
+                               CFG_CMD_DATE    | \
+                               CFG_CMD_DHCP    | \
+                               CFG_CMD_I2C     )
+
 #define CONFIG_BOOTP_MASK      (CONFIG_BOOTP_DEFAULT | CONFIG_BOOTP_BOOTFILESIZE)
 
 /* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
@@ -152,6 +183,11 @@
 #define CFG_ENV_OFFSET_REDUND  (CFG_ENV_OFFSET+CFG_ENV_SIZE)
 #define CFG_ENV_SIZE_REDUND    (CFG_ENV_SIZE)
 
+/*-----------------------------------------------------------------------
+ * Reset address
+ */
+#define        CFG_RESET_ADDRESS       ((ulong)((((immap_t *)CFG_IMMR)->im_clkrst.res)))
+
 /*-----------------------------------------------------------------------
  * Cache Configuration
  */

diff --git a/include/watchdog.h b/include/watchdog.h
index b9ae916..7180259 100644 (file)
--- a/include/watchdog.h
+++ b/include/watchdog.h
@@ -85,16 +85,4 @@
        void reset_4xx_watchdog(void);
 #endif
 
-/* MPC 8260 */
-#if defined(CONFIG_MPC8260) && !defined(__ASSEMBLY__)
-#if defined(CONFIG_WATCHDOG)
-extern __inline__ void
-reset_8260_watchdog(volatile immap_t *immr)
-{
-       immr->im_siu_conf.sc_swsr = 0x556c;
-       immr->im_siu_conf.sc_swsr = 0xaa39;
-}
-#endif /* !__ASSEMBLY__ && CONFIG_WATCHDOG */
-#endif /* CONFIG_MPC8260 && !__ASSEMBLY__ */
-
 #endif /* _WATCHDOG_H_ */