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/*
* (C) Copyright 2009 DENX Software Engineering
* Author: John Rigby <jrigby@gmail.com>
*
* Based on imx27lite.c:
* Copyright (C) 2008,2009 Eric Jarrige <jorasse@users.sourceforge.net>
* Copyright (C) 2009 Ilya Yanok <yanok@emcraft.com>
* And:
* RedBoot tx25_misc.c Copyright (C) 2009 Red Hat
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux-mx25.h>
#include <asm/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SPL_BUILD
void board_init_f(ulong bootflag)
{
/*
* copy ourselves from where we are running to where we were
* linked at. Use ulong pointers as all addresses involved
* are 4-byte-aligned.
*/
ulong *start_ptr, *end_ptr, *link_ptr, *run_ptr, *dst;
asm volatile ("ldr %0, =_start" : "=r"(start_ptr));
asm volatile ("ldr %0, =_end" : "=r"(end_ptr));
asm volatile ("ldr %0, =board_init_f" : "=r"(link_ptr));
asm volatile ("adr %0, board_init_f" : "=r"(run_ptr));
for (dst = start_ptr; dst < end_ptr; dst++)
*dst = *(dst+(run_ptr-link_ptr));
/*
* branch to nand_boot's link-time address.
*/
asm volatile("ldr pc, =nand_boot");
}
#endif
#ifdef CONFIG_FEC_MXC
/*
* FIXME: need to revisit this
* The original code enabled PUE and 100-k pull-down without PKE, so the right
* value here is likely:
* 0 for no pull
* or:
* PAD_CTL_PUS_100K_DOWN for 100-k pull-down
*/
#define FEC_OUT_PAD_CTRL 0
#define GPIO_FEC_RESET_B IMX_GPIO_NR(4, 7)
#define GPIO_FEC_ENABLE_B IMX_GPIO_NR(4, 9)
void tx25_fec_init(void)
{
static const iomux_v3_cfg_t fec_pads[] = {
MX25_PAD_FEC_TX_CLK__FEC_TX_CLK,
MX25_PAD_FEC_RX_DV__FEC_RX_DV,
MX25_PAD_FEC_RDATA0__FEC_RDATA0,
NEW_PAD_CTRL(MX25_PAD_FEC_TDATA0__FEC_TDATA0, FEC_OUT_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_FEC_TX_EN__FEC_TX_EN, FEC_OUT_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_FEC_MDC__FEC_MDC, FEC_OUT_PAD_CTRL),
MX25_PAD_FEC_MDIO__FEC_MDIO,
MX25_PAD_FEC_RDATA1__FEC_RDATA1,
NEW_PAD_CTRL(MX25_PAD_FEC_TDATA1__FEC_TDATA1, FEC_OUT_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_D13__GPIO_4_7, 0), /* FEC_RESET_B */
NEW_PAD_CTRL(MX25_PAD_D11__GPIO_4_9, 0), /* FEC_ENABLE_B */
};
static const iomux_v3_cfg_t fec_cfg_pads[] = {
MX25_PAD_FEC_RDATA0__GPIO_3_10,
MX25_PAD_FEC_RDATA1__GPIO_3_11,
MX25_PAD_FEC_RX_DV__GPIO_3_12,
};
debug("tx25_fec_init\n");
imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
/* drop PHY power and assert reset (low) */
gpio_direction_output(GPIO_FEC_RESET_B, 0);
gpio_direction_output(GPIO_FEC_ENABLE_B, 0);
mdelay(5);
debug("resetting phy\n");
/* turn on PHY power leaving reset asserted */
gpio_set_value(GPIO_FEC_ENABLE_B, 1);
mdelay(10);
/*
* Setup some strapping pins that are latched by the PHY
* as reset goes high.
*
* Set PHY mode to 111
* mode0 comes from FEC_RDATA0 which is GPIO 3_10 in mux mode 5
* mode1 comes from FEC_RDATA1 which is GPIO 3_11 in mux mode 5
* mode2 is tied high so nothing to do
*
* Turn on RMII mode
* RMII mode is selected by FEC_RX_DV which is GPIO 3_12 in mux mode
*/
/*
* set each mux mode to gpio mode
*/
imx_iomux_v3_setup_multiple_pads(fec_cfg_pads,
ARRAY_SIZE(fec_cfg_pads));
/*
* set each to 1 and make each an output
*/
gpio_direction_output(IMX_GPIO_NR(3, 10), 1);
gpio_direction_output(IMX_GPIO_NR(3, 11), 1);
gpio_direction_output(IMX_GPIO_NR(3, 12), 1);
mdelay(22); /* this value came from RedBoot */
/*
* deassert PHY reset
*/
gpio_set_value(GPIO_FEC_RESET_B, 1);
mdelay(5);
/*
* set FEC pins back
*/
imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
}
#else
#define tx25_fec_init()
#endif
#ifdef CONFIG_MXC_UART
/*
* Set up input pins with hysteresis and 100-k pull-ups
*/
#define UART1_IN_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP)
/*
* FIXME: need to revisit this
* The original code enabled PUE and 100-k pull-down without PKE, so the right
* value here is likely:
* 0 for no pull
* or:
* PAD_CTL_PUS_100K_DOWN for 100-k pull-down
*/
#define UART1_OUT_PAD_CTRL 0
static void tx25_uart1_init(void)
{
static const iomux_v3_cfg_t uart1_pads[] = {
NEW_PAD_CTRL(MX25_PAD_UART1_RXD__UART1_RXD, UART1_IN_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_UART1_TXD__UART1_TXD, UART1_OUT_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_UART1_RTS__UART1_RTS, UART1_OUT_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_UART1_CTS__UART1_CTS, UART1_IN_PAD_CTRL),
};
imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
}
#else
#define tx25_uart1_init()
#endif
int board_init()
{
tx25_uart1_init();
/* board id for linux */
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
return 0;
}
int board_late_init(void)
{
tx25_fec_init();
return 0;
}
int dram_init(void)
{
/* dram_init must store complete ramsize in gd->ram_size */
gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1,
PHYS_SDRAM_1_SIZE);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1,
PHYS_SDRAM_1_SIZE);
#if CONFIG_NR_DRAM_BANKS > 1
gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2,
PHYS_SDRAM_2_SIZE);
#else
#endif
}
int checkboard(void)
{
printf("KARO TX25\n");
return 0;
}
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