* Patches by Robert Schwebel, 06 Mar 2003:

  - fix bug in BOOTP code (must use NetCopyIP)
  - update of CSB226 port
  - clear BSS segment on XScale
  - added support for i2c_init_board() function
  - update to the Innokom plattform

* Extend support for redundand environments for configurations where
  environment size < sector size

6 files changed, 63 insertions, 1 deletions

diff --git a/cpu/mpc824x/drivers/i2c/i2c1.c b/cpu/mpc824x/drivers/i2c/i2c1.c
index be6ec60a1..7a2eb6665 100644
--- a/cpu/mpc824x/drivers/i2c/i2c1.c
+++ b/cpu/mpc824x/drivers/i2c/i2c1.c
@@ -1128,6 +1128,15 @@ static void I2C_Set_Stat (unsigned int eumbbar, I2C_STAT stat)
 
 void i2c_init (int speed, int slaveadd)
 {
+#ifdef CFG_I2C_INIT_BOARD
+	/*
+	 * call board specific i2c bus reset routine before accessing the
+	 * environment, which might be in a chip on that bus. For details
+	 * about this problem see doc/I2C_Edge_Conditions.
+	 */
+	i2c_init_board();
+#endif
+
 #ifdef DEBUG
 	I2C_Initialize (0x7f, 0, (void *) printf);
 #else
diff --git a/cpu/mpc8260/i2c.c b/cpu/mpc8260/i2c.c
index 8bfa2e8e7..2d65e3273 100644
--- a/cpu/mpc8260/i2c.c
+++ b/cpu/mpc8260/i2c.c
@@ -221,6 +221,13 @@ void i2c_init(int speed, int slaveadd)
 	volatile I2C_BD *rxbd, *txbd;
 	uint dpaddr;
 
+#ifdef CFG_I2C_INIT_BOARD        
+	/* call board specific i2c bus reset routine before accessing the   */
+	/* environment, which might be in a chip on that bus. For details   */
+	/* about this problem see doc/I2C_Edge_Conditions.                  */
+	i2c_init_board();
+#endif
+
 	dpaddr = *((unsigned short*)(&immap->im_dprambase[PROFF_I2C_BASE]));
 	if (dpaddr == 0) {
 	    /* need to allocate dual port ram */
diff --git a/cpu/mpc8xx/i2c.c b/cpu/mpc8xx/i2c.c
index 9d5d9d265..9e8b8c7e7 100644
--- a/cpu/mpc8xx/i2c.c
+++ b/cpu/mpc8xx/i2c.c
@@ -215,6 +215,13 @@ i2c_init(int speed, int slaveaddr)
 	volatile I2C_BD *rxbd, *txbd;
 	uint dpaddr;
 
+#ifdef CFG_I2C_INIT_BOARD        
+	/* call board specific i2c bus reset routine before accessing the   */
+	/* environment, which might be in a chip on that bus. For details   */
+	/* about this problem see doc/I2C_Edge_Conditions.                  */
+	i2c_init_board();
+#endif
+
 #ifdef CFG_I2C_UCODE_PATCH
 	iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
 #else
diff --git a/cpu/ppc4xx/i2c.c b/cpu/ppc4xx/i2c.c
index 68af057d1..7d8db9bf4 100644
--- a/cpu/ppc4xx/i2c.c
+++ b/cpu/ppc4xx/i2c.c
@@ -85,7 +85,15 @@ void i2c_init (int speed, int slaveadd)
 	unsigned long freqOPB;
 	int val, divisor;
 
+#ifdef CFG_I2C_INIT_BOARD        
+	/* call board specific i2c bus reset routine before accessing the   */
+	/* environment, which might be in a chip on that bus. For details   */
+	/* about this problem see doc/I2C_Edge_Conditions.                  */
+	i2c_init_board();
+#endif
+
 	/* Handle possible failed I2C state */
+	/* FIXME: put this into i2c_init_board()? */
 	_i2c_bus_reset ();
 
 	/* clear lo master address */
diff --git a/cpu/xscale/i2c.c b/cpu/xscale/i2c.c
index f546f14cb..406f825cd 100644
--- a/cpu/xscale/i2c.c
+++ b/cpu/xscale/i2c.c
@@ -41,6 +41,7 @@
  *	- I2C_PXA_SLAVE_ADDR 
  */
 
+#include <asm/arch/hardware.h>
 #include <asm/arch/pxa-regs.h>
 #include <i2c.h>
 
@@ -244,6 +245,12 @@ i2c_transfer_finish:
 
 void i2c_init(int speed, int slaveaddr)
 {
+#ifdef CFG_I2C_INIT_BOARD        
+	/* call board specific i2c bus reset routine before accessing the   */
+	/* environment, which might be in a chip on that bus. For details   */
+	/* about this problem see doc/I2C_Edge_Conditions.                  */
+	i2c_init_board();
+#endif
 }
 
 
diff --git a/cpu/xscale/start.S b/cpu/xscale/start.S
index e63fece8b..3d9784ebf 100644
--- a/cpu/xscale/start.S
+++ b/cpu/xscale/start.S
@@ -84,6 +84,17 @@ _armboot_end:
 	.word armboot_end
 
 /*
+ * This is defined in the board specific linker script
+ */
+.globl _bss_start	
+_bss_start:	
+	.word bss_start
+
+.globl _bss_end
+_bss_end:
+	.word bss_end
+
+/*
  * _armboot_real_end is the first usable RAM address behind armboot
  * and the various stacks
  */
@@ -143,7 +154,20 @@ copy_loop:
 	ldr	r0, _uboot_reloc	/* upper 128 KiB: relocated uboot   */
 	sub	r0, r0, #CFG_MALLOC_LEN /* malloc area			    */
 					/* FIXME: bdinfo should be here	    */
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
+clear_bss:
+
+	ldr	r0, _bss_start		/* find start of bss segment        */
+	add	r0, r0, #4		/* start at first byte of bss       */
+	ldr	r1, _bss_end		/* stop here                        */
+	mov 	r2, #0x00000000		/* clear                            */
+
+clbss_l:str	r2, [r0]		/* clear loop...                    */
+	add	r0, r0, #4
+	cmp	r0, r1
+	bne	clbss_l	 
+
 
 	ldr	pc, _start_armboot