arm/davinci/da850: add uart0 pinmux

[oweals/u-boot.git] / arch / arm / cpu / arm926ejs / mx28 / spl_boot.c

diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_boot.c b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
index 37e1eb75ee8759c951d0a1cd7388f12c32b386cf..a6dfca3f51f66ff87d758dbe7d9633a696191be6 100644 (file)
--- a/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
@@ -29,6 +29,7 @@
 #include <asm/arch/iomux-mx28.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
 
 #include "mx28_init.h"
 
@@ -47,11 +48,56 @@ void early_delay(int delay)
                ;
 }
 
+#define        MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
+const iomux_cfg_t iomux_boot[] = {
+       MX28_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
+       MX28_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
+       MX28_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
+       MX28_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
+       MX28_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
+       MX28_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
+};
+
+uint8_t mx28_get_bootmode_index(void)
+{
+       uint8_t bootmode = 0;
+       int i;
+       uint8_t masked;
+
+       /* Setup IOMUX of bootmode pads to GPIO */
+       mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
+
+       /* Setup bootmode pins as GPIO input */
+       gpio_direction_input(MX28_PAD_LCD_D00__GPIO_1_0);
+       gpio_direction_input(MX28_PAD_LCD_D01__GPIO_1_1);
+       gpio_direction_input(MX28_PAD_LCD_D02__GPIO_1_2);
+       gpio_direction_input(MX28_PAD_LCD_D03__GPIO_1_3);
+       gpio_direction_input(MX28_PAD_LCD_D04__GPIO_1_4);
+       gpio_direction_input(MX28_PAD_LCD_D05__GPIO_1_5);
+
+       /* Read bootmode pads */
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D04__GPIO_1_4) ? 1 : 0) << 4;
+       bootmode |= (gpio_get_value(MX28_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
+
+       for (i = 0; i < ARRAY_SIZE(mx28_boot_modes); i++) {
+               masked = bootmode & mx28_boot_modes[i].boot_mask;
+               if (masked == mx28_boot_modes[i].boot_pads)
+                       break;
+       }
+
+       return i;
+}
+
 void mx28_common_spl_init(const iomux_cfg_t *iomux_setup,
                        const unsigned int iomux_size)
 {
        struct mx28_spl_data *data = (struct mx28_spl_data *)
                ((CONFIG_SYS_TEXT_BASE - sizeof(struct mx28_spl_data)) & ~0xf);
+       uint8_t bootmode = mx28_get_bootmode_index();
 
        mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
        mx28_power_init();
@@ -59,6 +105,8 @@ void mx28_common_spl_init(const iomux_cfg_t *iomux_setup,
        mx28_mem_init();
        data->mem_dram_size = mx28_mem_get_size();
 
+       data->boot_mode_idx = bootmode;
+
        mx28_power_wait_pswitch();
 }
 
@@ -75,8 +123,10 @@ inline void board_init_r(gd_t *id, ulong dest_addr)
                ;
 }
 
+#ifndef CONFIG_SPL_SERIAL_SUPPORT
 void serial_putc(const char c) {}
 void serial_puts(const char *s) {}
+#endif
 void hang(void) __attribute__ ((noreturn));
 void hang(void)
 {