From f835ea7158025818d69384a7ebd8c3de0f10a9f7 Mon Sep 17 00:00:00 2001 From: Jason Kridner Date: Wed, 21 Jul 2010 07:41:25 -0500 Subject: BeagleBoard: Added userbutton command Based on commit f1099c7c43caf5bac3bf6a65aa266fade4747072 Author: Greg Turner Date: Tue May 25 09:19:06 2010 -0500 New u-boot command for status of USER button on BeagleBoard-xM Modified bootcmd to check the staus at boot time and set filename of the boot script. * Moved to a BeagleBoard specific file. * Removed changes to default boot command from adding userbutton command. * Made to handle pre-xM boards. * Flipped polarity of the return value to avoid confusion. Success (0) is when the button is pressed. Failure (1) is when the button is NOT pressed. * Used latest revision getting function. * Used latest macros for board revision. * Added xM-C revision definition (optional, since it was default) * updated default configuration with UserButton functionality * Added a separate bootenv variable to load a user defined .txt file * Added an example, showing how a different environment file can be loaded with the user button pressed Signed-off-by: Jason Kridner Signed-off-by: Koen Kooi Signed-off-by: Joel A Fernandes Cc: Greg Turner Signed-off-by: Sandeep Paulraj --- board/ti/beagle/beagle.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'board/ti') diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index a958545776..8dc8dfa020 100644 --- a/board/ti/beagle/beagle.c +++ b/board/ti/beagle/beagle.c @@ -50,6 +50,7 @@ extern struct ehci_hccr *hccr; extern volatile struct ehci_hcor *hcor; #endif #include "beagle.h" +#include #define pr_debug(fmt, args...) debug(fmt, ##args) @@ -446,3 +447,58 @@ int ehci_hcd_init(void) } #endif /* CONFIG_USB_EHCI */ + +/* + * This command returns the status of the user button on beagle xM + * Input - none + * Returns - 1 if button is held down + * 0 if button is not held down + */ +int do_userbutton (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + int button = 0; + int gpio; + + /* + * pass address parameter as argv[0] (aka command name), + * and all remaining args + */ + switch (get_board_revision()) { + case REVISION_AXBX: + case REVISION_CX: + case REVISION_C4: + gpio = 7; + break; + case REVISION_XM_A: + case REVISION_XM_B: + case REVISION_XM_C: + default: + gpio = 4; + break; + } + omap_request_gpio(gpio); + omap_set_gpio_direction(gpio, 1); + printf("The user button is currently "); + if(omap_get_gpio_datain(gpio)) + { + button = 1; + printf("PRESSED.\n"); + } + else + { + button = 0; + printf("NOT pressed.\n"); + } + + omap_free_gpio(gpio); + + return !button; +} + +/* -------------------------------------------------------------------- */ + +U_BOOT_CMD( + userbutton, CONFIG_SYS_MAXARGS, 1, do_userbutton, + "Return the status of the BeagleBoard USER button", + "" +); -- cgit v1.2.1