To enter the special mode, one needs to short cut two pads with e.g. screw driver.
After power up the SPL will execute u-boot in which proper actions will be taken.
It is worth noting that we do not alter envs (even the BOOT_FROM variable) and unconditionally go to recovery.
Signed-off-by: Lukasz Majewski lukma@denx.de ---
board/liebherr/display5/common.c | 10 ++++++++++ board/liebherr/display5/common.h | 1 + board/liebherr/display5/display5.c | 19 +++++++++++++++++++ board/liebherr/display5/spl.c | 22 ++++++++++++++++++++++ include/configs/display5.h | 8 ++++++-- 5 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/board/liebherr/display5/common.c b/board/liebherr/display5/common.c index 26575f73bd..4eb86d8c5d 100644 --- a/board/liebherr/display5/common.c +++ b/board/liebherr/display5/common.c @@ -34,6 +34,16 @@ void displ5_set_iomux_uart(void) SETUP_IOMUX_PADS(uart_pads); }
+iomux_v3_cfg_t const misc_pads_spl[] = { + /* Emergency recovery pin */ + MX6_PAD_EIM_D29__GPIO3_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL), +}; + +void displ5_set_iomux_misc_spl(void) +{ + SETUP_IOMUX_PADS(misc_pads_spl); +} + #ifdef CONFIG_MXC_SPI iomux_v3_cfg_t const ecspi_pads[] = { /* SPI3 */ diff --git a/board/liebherr/display5/common.h b/board/liebherr/display5/common.h index a507ef9ce8..78c64b02e2 100644 --- a/board/liebherr/display5/common.h +++ b/board/liebherr/display5/common.h @@ -37,5 +37,6 @@ void displ5_set_iomux_ecspi_spl(void); void displ5_set_iomux_ecspi(void); void displ5_set_iomux_usdhc_spl(void); void displ5_set_iomux_usdhc(void); +void displ5_set_iomux_misc_spl(void);
#endif /* __DISPL5_COMMON_H_ */ diff --git a/board/liebherr/display5/display5.c b/board/liebherr/display5/display5.c index ebc643e7e3..4bade476a5 100644 --- a/board/liebherr/display5/display5.c +++ b/board/liebherr/display5/display5.c @@ -44,6 +44,7 @@ static bool sw_ids_valid; static u32 cpu_id; static u32 unit_id;
+#define EM_PAD IMX_GPIO_NR(3, 29) #define SW0 IMX_GPIO_NR(2, 4) #define SW1 IMX_GPIO_NR(2, 5) #define SW2 IMX_GPIO_NR(2, 6) @@ -179,6 +180,9 @@ iomux_v3_cfg_t const misc_pads[] = {
/* XTALOSC */ MX6_PAD_GPIO_3__XTALOSC_REF_CLK_24M | MUX_PAD_CTRL(NO_PAD_CTRL), + + /* Emergency recovery pin */ + MX6_PAD_EIM_D29__GPIO3_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL), };
#ifdef CONFIG_FSL_ESDHC @@ -369,7 +373,22 @@ static inline void setup_boot_modes(void) {}
int misc_init_r(void) { + int ret; + setup_boot_modes(); + + ret = gpio_request(EM_PAD, "Emergency_PAD"); + if (ret) { + printf("Can't request emergency PAD gpio\n"); + return ret; + } + + ret = gpio_direction_input(EM_PAD); + if (ret) { + printf("Can't set emergency PAD direction\n"); + return ret; + } + return 0; }
diff --git a/board/liebherr/display5/spl.c b/board/liebherr/display5/spl.c index 0d25b0d996..551a14347d 100644 --- a/board/liebherr/display5/spl.c +++ b/board/liebherr/display5/spl.c @@ -16,6 +16,7 @@ #include <asm/arch/imx-regs.h> #include "asm/arch/iomux.h" #include <asm/mach-imx/iomux-v3.h> +#include <asm/gpio.h> #include <environment.h> #include <fsl_esdhc.h> #include <netdev.h> @@ -194,10 +195,24 @@ void board_init_f(ulong dummy) /* Clear the BSS. */ memset(__bss_start, 0, __bss_end - __bss_start);
+ displ5_set_iomux_misc_spl(); + /* load/boot image from boot device */ board_init_r(NULL, 0); }
+#define EM_PAD IMX_GPIO_NR(3, 29) +int board_check_emergency_pad(void) +{ + int ret; + + ret = gpio_direction_input(EM_PAD); + if (ret) + return ret; + + return !gpio_get_value(EM_PAD); +} + void board_boot_order(u32 *spl_boot_list) { /* Default boot sequence SPI -> MMC */ @@ -206,6 +221,13 @@ void board_boot_order(u32 *spl_boot_list) spl_boot_list[2] = BOOT_DEVICE_UART; spl_boot_list[3] = BOOT_DEVICE_NONE;
+ /* + * In case of emergency PAD pressed, we always boot + * to proper u-boot and perform recovery tasks there. + */ + if (board_check_emergency_pad()) + return; + #ifdef CONFIG_SPL_ENV_SUPPORT /* 'fastboot' */ const char *s; diff --git a/include/configs/display5.h b/include/configs/display5.h index 49a1ead649..574e15eb1a 100644 --- a/include/configs/display5.h +++ b/include/configs/display5.h @@ -100,11 +100,13 @@ #define CONFIG_BAUDRATE 115200
#ifndef CONFIG_BOOTCOMMAND -#define CONFIG_BOOTCOMMAND "if test ${BOOT_FROM} = FACTORY; then " \ +#define CONFIG_BOOTCOMMAND "if run check_em_pad; then " \ + "run recovery;" \ + "else if test ${BOOT_FROM} = FACTORY; then " \ "run factory_nfs;" \ "else " \ "run boot_mmc;" \ - "fi" + "fi;fi" #endif
#define PARTS_DEFAULT \ @@ -246,6 +248,8 @@
#define CONFIG_EXTRA_ENV_SETTINGS \ PARTS_DEFAULT \ + "gpio_recovery=93\0" \ + "check_em_pad=gpio input ${gpio_recovery};test $? -eq 0;\0" \ "display=tianma-tm070-800x480\0" \ "board=display5\0" \ "mmcdev=0\0" \