Unified codebase for TX28, TX48, TX51, TX53

[karo-tx-uboot.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 dfb8309e7006457975890a48cb13d657c417f6c9..f0d012d2aac92c589c6fce62cdcbb0ccc8e659d5 100644 (file)
--- a/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
@@ -28,6 +28,8 @@
 #include <asm/io.h>
 #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"
 
@@ -37,25 +39,81 @@
  * takes a few seconds to roll. The boot doesn't take that long, so to keep the
  * code simple, it doesn't take rolling into consideration.
  */
+/*
+ * There's nothing to be taken into consideration for the rollover.
+ * Two's complement arithmetic used correctly does all the magic automagically.
+ */
 #define        HW_DIGCTRL_MICROSECONDS 0x8001c0c0
 void early_delay(int delay)
 {
        uint32_t st = readl(HW_DIGCTRL_MICROSECONDS);
-       st += delay;
-       while (st > readl(HW_DIGCTRL_MICROSECONDS))
-               ;
+
+       while (readl(HW_DIGCTRL_MICROSECONDS) - st < 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();
+
        mx28_mem_init();
+       data->mem_dram_size = mx28_mem_get_size();
+
+       data->boot_mode_idx = bootmode;
+
        mx28_power_wait_pswitch();
 }
 
-/* Support aparatus */
+/* Support apparatus */
 inline void board_init_f(unsigned long bootflag)
 {
        for (;;)
@@ -68,11 +126,14 @@ 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)
 {
+       serial_puts("ERROR: please reset the target\n");
        for (;;)
                ;
 }