Dear Eric Nelson,
Uses the 'magic_keys' idiom as described in doc/README.kbd: http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
Signed-off-by: Eric Nelson eric.nelson@boundarydevices.com
Acked-by: Marek Vasut marex@denx.de
V2 based on suggestion by Wolfgang to follow prior implementations. V3 fixes style issues highlighted by Marek Vasut.
board/freescale/mx6qsabrelite/mx6qsabrelite.c | 121 ++++++++++++++++++++++++- include/configs/mx6qsabrelite.h | 3 + 2 files changed, 122 insertions(+), 2 deletions(-)
diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c b/board/freescale/mx6qsabrelite/mx6qsabrelite.c index 1d09a72..3684216 100644 --- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c +++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c @@ -50,6 +50,10 @@ DECLARE_GLOBAL_DATA_PTR; PAD_CTL_PUS_100K_DOWN | PAD_CTL_SPEED_MED | \ PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
+#define BUTTON_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
- PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
- PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
int dram_init(void) { gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE); @@ -122,6 +126,22 @@ iomux_v3_cfg_t enet_pads2[] = { MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL), };
+/* Button assignments for J14 */ +static iomux_v3_cfg_t button_pads[] = {
- /* Menu */
- MX6Q_PAD_NANDF_D1__GPIO_2_1 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
- /* Back */
- MX6Q_PAD_NANDF_D2__GPIO_2_2 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
- /* Labelled Search (mapped to Power under Android) */
- MX6Q_PAD_NANDF_D3__GPIO_2_3 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
- /* Home */
- MX6Q_PAD_NANDF_D4__GPIO_2_4 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
- /* Volume Down */
- MX6Q_PAD_GPIO_19__GPIO_4_5 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
- /* Volume Up */
- MX6Q_PAD_GPIO_18__GPIO_7_13 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+};
static void setup_iomux_enet(void) { gpio_direction_output(87, 0); /* GPIO 3-23 */ @@ -267,11 +287,18 @@ int board_eth_init(bd_t *bis) return 0; }
+static void setup_buttons(void) +{
- imx_iomux_v3_setup_multiple_pads(button_pads,
ARRAY_SIZE(button_pads));+}
int board_early_init_f(void) {
setup_iomux_uart();
- setup_iomux_uart();
- setup_buttons();
return 0;
- return 0;
}
int board_init(void) @@ -292,3 +319,93 @@ int checkboard(void)
return 0;}
+struct button_key {
- char const *name;
- unsigned gpnum;
- char ident;
+};
+static struct button_key const buttons[] = {
- {"back", GPIO_NUMBER(2, 2), 'B'},
- {"home", GPIO_NUMBER(2, 4), 'H'},
- {"menu", GPIO_NUMBER(2, 1), 'M'},
- {"search", GPIO_NUMBER(2, 3), 'S'},
- {"volup", GPIO_NUMBER(7, 13), 'V'},
- {"voldown", GPIO_NUMBER(4, 5), 'v'},
+};
+/*
- generate a null-terminated string containing the buttons pressed
- returns number of keys pressed
- */
+static int read_keys(char *buf) +{
- int i, numpressed = 0;
- for (i = 0; i < ARRAY_SIZE(buttons); i++) {
if (!gpio_get_value(buttons[i].gpnum))buf[numpressed++] = buttons[i].ident;- }
- buf[numpressed] = '\0';
- return numpressed;
+}
+static int do_kbd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{
- char envvalue[ARRAY_SIZE(buttons)+1];
- int numpressed = read_keys(envvalue);
- setenv("keybd", envvalue);
- return numpressed == 0;
+}
+U_BOOT_CMD(
- kbd, 1, 1, do_kbd,
- "Tests for keypresses, sets 'keybd' environment variable",
- "Returns 0 (true) to shell if key is pressed."
+);
+#ifdef CONFIG_PREBOOT +static char const kbd_magic_prefix[] = "key_magic"; +static char const kbd_command_prefix[] = "key_cmd";
+static void preboot_keys(void) +{
- int i, numpressed;
- char keypress[ARRAY_SIZE(buttons)+1];
- numpressed = read_keys(keypress);
- if (numpressed) {
char *kbd_magic_keys = getenv("magic_keys");char *suffix;/** loop over all magic keys*/for (suffix = kbd_magic_keys; *suffix; ++suffix) {char *keys;char magic[sizeof(kbd_magic_prefix) + 1];sprintf(magic, "%s%c", kbd_magic_prefix, *suffix);keys = getenv(magic);if (keys) {if (!strcmp(keys, keypress))break;}}if (*suffix) {char cmd_name[sizeof(kbd_command_prefix) + 1];char *cmd;sprintf(cmd_name, "%s%c", kbd_command_prefix, *suffix);cmd = getenv(cmd_name);if (cmd) {setenv("preboot", cmd);return;}}- }
+} +#endif
+int misc_init_r(void) +{ +#ifdef CONFIG_PREBOOT
- preboot_keys();
+#endif +} diff --git a/include/configs/mx6qsabrelite.h b/include/configs/mx6qsabrelite.h index 8bc8a83..7bf8479 100644 --- a/include/configs/mx6qsabrelite.h +++ b/include/configs/mx6qsabrelite.h @@ -42,6 +42,7 @@
#define CONFIG_ARCH_CPU_INIT #define CONFIG_BOARD_EARLY_INIT_F +#define CONFIG_MISC_INIT_R #define CONFIG_MXC_GPIO
#define CONFIG_MXC_UART @@ -110,6 +111,8 @@
#define CONFIG_BOOTDELAY 3
+#define CONFIG_PREBOOT ""
#define CONFIG_LOADADDR 0x10800000 #define CONFIG_SYS_TEXT_BASE 0x17800000