u-boot/board/freescale/mx23evk/spl_boot.c
Marek Vasut 7b8657e2bd ARM: mxs: Receive r0 and r1 passed from BootROM
Make sure value in register r0 and r1 is preserved and passed to
the board_init_ll() and mxs_common_spl_init() where it can be
processed further. The value in r0 can be configured during the
BootStream generation to arbitary value, r1 contains pointer to
return value from CALL'd function.

This patch also clears the value in r0 before returning to BootROM
to make sure the BootROM is not confused by this value.

Finally, this patch cleans up some comments in the start.S file.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
2013-09-10 19:12:54 +02:00

135 lines
4.9 KiB
C

/*
* Freescale MX23EVK Boot setup
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
#include <asm/io.h>
#include <asm/arch/iomux-mx23.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#define MUX_CONFIG_SSP1 (MXS_PAD_8MA | MXS_PAD_PULLUP)
#define MUX_CONFIG_EMI (MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_PULLUP)
#define MUX_CONFIG_LCD (MXS_PAD_4MA | MXS_PAD_NOPULL)
const iomux_cfg_t iomux_setup[] = {
/* DUART */
MX23_PAD_PWM0__DUART_RX,
MX23_PAD_PWM1__DUART_TX,
/* EMI */
MX23_PAD_EMI_D00__EMI_D00 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D01__EMI_D01 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D02__EMI_D02 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D03__EMI_D03 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D04__EMI_D04 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D05__EMI_D05 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D06__EMI_D06 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D07__EMI_D07 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D08__EMI_D08 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D09__EMI_D09 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D10__EMI_D10 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D11__EMI_D11 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D12__EMI_D12 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D13__EMI_D13 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D14__EMI_D14 | MUX_CONFIG_EMI,
MX23_PAD_EMI_D15__EMI_D15 | MUX_CONFIG_EMI,
MX23_PAD_EMI_DQM0__EMI_DQM0 | MUX_CONFIG_EMI,
MX23_PAD_EMI_DQM1__EMI_DQM1 | MUX_CONFIG_EMI,
MX23_PAD_EMI_DQS0__EMI_DQS0 | MUX_CONFIG_EMI,
MX23_PAD_EMI_DQS1__EMI_DQS1 | MUX_CONFIG_EMI,
MX23_PAD_EMI_CLK__EMI_CLK | MUX_CONFIG_EMI,
MX23_PAD_EMI_CLKN__EMI_CLKN | MUX_CONFIG_EMI,
MX23_PAD_EMI_A00__EMI_A00 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A01__EMI_A01 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A02__EMI_A02 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A03__EMI_A03 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A04__EMI_A04 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A05__EMI_A05 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A06__EMI_A06 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A07__EMI_A07 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A08__EMI_A08 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A09__EMI_A09 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A10__EMI_A10 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A11__EMI_A11 | MUX_CONFIG_EMI,
MX23_PAD_EMI_A12__EMI_A12 | MUX_CONFIG_EMI,
MX23_PAD_EMI_BA0__EMI_BA0 | MUX_CONFIG_EMI,
MX23_PAD_EMI_BA1__EMI_BA1 | MUX_CONFIG_EMI,
MX23_PAD_EMI_CASN__EMI_CASN | MUX_CONFIG_EMI,
MX23_PAD_EMI_CE0N__EMI_CE0N | MUX_CONFIG_EMI,
MX23_PAD_EMI_CE1N__EMI_CE1N | MUX_CONFIG_EMI,
MX23_PAD_EMI_CKE__EMI_CKE | MUX_CONFIG_EMI,
MX23_PAD_EMI_RASN__EMI_RASN | MUX_CONFIG_EMI,
MX23_PAD_EMI_WEN__EMI_WEN | MUX_CONFIG_EMI,
/* MMC 0 */
MX23_PAD_SSP1_DATA0__SSP1_DATA0 | MUX_CONFIG_SSP1,
MX23_PAD_SSP1_DATA1__SSP1_DATA1 | MUX_CONFIG_SSP1,
MX23_PAD_SSP1_DATA2__SSP1_DATA2 | MUX_CONFIG_SSP1,
MX23_PAD_SSP1_DATA3__SSP1_DATA3 | MUX_CONFIG_SSP1,
MX23_PAD_SSP1_CMD__SSP1_CMD | MUX_CONFIG_SSP1,
MX23_PAD_SSP1_DETECT__SSP1_DETECT | MUX_CONFIG_SSP1,
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
MX23_PAD_SSP1_SCK__SSP1_SCK |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
/* Write Protect Pin */
MX23_PAD_PWM4__GPIO_1_30 |
(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
/* Slot Power Enable */
MX23_PAD_PWM3__GPIO_1_29 |
(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
/* LCD */
MX23_PAD_LCD_D00__LCD_D00 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D01__LCD_D01 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D02__LCD_D02 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D03__LCD_D03 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D04__LCD_D04 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D05__LCD_D05 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D06__LCD_D06 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D07__LCD_D07 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D08__LCD_D08 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D09__LCD_D09 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D10__LCD_D10 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D11__LCD_D11 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D12__LCD_D12 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D13__LCD_D13 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D14__LCD_D14 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D15__LCD_D15 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D16__LCD_D16 | MUX_CONFIG_LCD,
MX23_PAD_LCD_D17__LCD_D17 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D08__LCD_D18 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D09__LCD_D19 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D10__LCD_D20 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D11__LCD_D21 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D12__LCD_D22 | MUX_CONFIG_LCD,
MX23_PAD_GPMI_D13__LCD_D23 | MUX_CONFIG_LCD,
MX23_PAD_LCD_DOTCK__LCD_DOTCK | MUX_CONFIG_LCD,
MX23_PAD_LCD_ENABLE__LCD_ENABLE | MUX_CONFIG_LCD,
MX23_PAD_LCD_HSYNC__LCD_HSYNC | MUX_CONFIG_LCD,
MX23_PAD_LCD_VSYNC__LCD_VSYNC | MUX_CONFIG_LCD,
MX23_PAD_LCD_RESET__GPIO_1_18 | MUX_CONFIG_LCD, /* LCD power */
MX23_PAD_PWM2__GPIO_1_28 | MUX_CONFIG_LCD, /* LCD contrast */
};
#define HW_DRAM_CTL14 (0x38 >> 2)
#define CS_MAP 0x3
#define INTAREF 0x2
#define HW_DRAM_CTL14_CONFIG (INTAREF << 8 | CS_MAP)
void mxs_adjust_memory_params(uint32_t *dram_vals)
{
dram_vals[HW_DRAM_CTL14] = HW_DRAM_CTL14_CONFIG;
}
void board_init_ll(const uint32_t arg, const uint32_t *resptr)
{
mxs_common_spl_init(arg, resptr, iomux_setup, ARRAY_SIZE(iomux_setup));
}