[U-Boot] [PATCH 21/21] board/BuR/kwb: Support modify bootcmd through reset-controller

Hannes Petermaier
2015-01-30T13:25:24Z

For some cases it is necessary to modify temporaly the bootcommand.
This can be done by writing into the Scratchregister a specific value:

* 0xCC - modify bootcmd "run netboot"
* 0xCD - modify bootcmd "run netscript"
* 0xCE - modify bootcmd "run mmcboot"

the environment in flash is NOT overwritten.

Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>
---
board/BuR/kwb/board.c | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/board/BuR/kwb/board.c b/board/BuR/kwb/board.c
index 455f472..892311e 100644
--- a/board/BuR/kwb/board.c
+++ b/board/BuR/kwb/board.c
@@ -169,10 +169,18 @@ int board_late_init(void)
const unsigned int toff = 1000;
unsigned int cnt = 3;
unsigned short buf = 0xAAAA;
+ unsigned char scratchreg = 0;
unsigned int oldspeed;

- tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
- TPS65217_WLEDCTRL2, 0x32, 0xFF); /* 50% dimlevel */
+ /* try to read out some boot-instruction from resetcontroller */
+ oldspeed = i2c_get_bus_speed();
+ if (i2c_set_bus_speed(CONFIG_SYS_OMAP24_I2C_SPEED_PSOC) >= 0) {
+ i2c_read(RSTCTRL_ADDR, RSTCTRL_SCRATCHREG, 1,
+ &scratchreg, sizeof(scratchreg));
+ i2c_set_bus_speed(oldspeed);
+ } else {
+ puts("ERROR: i2c_set_bus_speed failed! (scratchregister)\n");
+ }

if (gpio_get_value(ESC_KEY)) {
do {
@@ -223,6 +231,24 @@ int board_late_init(void)
break;
}
} while (cnt);
+ } else if (scratchreg == 0xCC) {
+ lcd_position_cursor(1, 8);
+ lcd_puts(
+ "starting vxworks from network ... ");
+ setenv("bootcmd", "run netboot");
+ cnt = 4;
+ } else if (scratchreg == 0xCD) {
+ lcd_position_cursor(1, 8);
+ lcd_puts(
+ "starting script from network ... ");
+ setenv("bootcmd", "run netscript");
+ cnt = 4;
+ } else if (scratchreg == 0xCE) {
+ lcd_position_cursor(1, 8);
+ lcd_puts(
+ "starting AR from eMMC ... ");
+ setenv("bootcmd", "run mmcboot");
+ cnt = 4;
}

lcd_position_cursor(1, 8);
--
1.7.9.5