#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"
* 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 (;;)
;
}
+#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 (;;)
;
}