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https://github.com/brain-hackers/u-boot-brain
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![Fabio Estevam](/assets/img/avatar_default.png)
Currently there is no support for MC34704 PMIC in the mainline kernel. Turn on the LCD supply via bootloader for the time being, so that we could use the LCD in the kernel. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
189 lines
4.5 KiB
C
189 lines
4.5 KiB
C
/*
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* (C) Copyright 2011 Freescale Semiconductor, Inc.
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*
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* Author: Fabio Estevam <fabio.estevam@freescale.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/iomux-mx25.h>
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#include <asm/arch/clock.h>
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#include <mmc.h>
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#include <fsl_esdhc.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <fsl_pmic.h>
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#include <mc34704.h>
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#define FEC_RESET_B IMX_GPIO_NR(4, 8)
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#define FEC_ENABLE_B IMX_GPIO_NR(2, 3)
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#define CARD_DETECT IMX_GPIO_NR(2, 1)
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_FSL_ESDHC
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struct fsl_esdhc_cfg esdhc_cfg[1] = {
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{IMX_MMC_SDHC1_BASE},
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};
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#endif
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/*
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* FIXME: need to revisit this
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* The original code enabled PUE and 100-k pull-down without PKE, so the right
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* value here is likely:
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* 0 for no pull
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* or:
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* PAD_CTL_PUS_100K_DOWN for 100-k pull-down
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*/
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#define FEC_OUT_PAD_CTRL 0
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#define I2C_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | \
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PAD_CTL_ODE)
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static void mx25pdk_fec_init(void)
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{
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static const iomux_v3_cfg_t fec_pads[] = {
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MX25_PAD_FEC_TX_CLK__FEC_TX_CLK,
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MX25_PAD_FEC_RX_DV__FEC_RX_DV,
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MX25_PAD_FEC_RDATA0__FEC_RDATA0,
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NEW_PAD_CTRL(MX25_PAD_FEC_TDATA0__FEC_TDATA0, FEC_OUT_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_FEC_TX_EN__FEC_TX_EN, FEC_OUT_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_FEC_MDC__FEC_MDC, FEC_OUT_PAD_CTRL),
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MX25_PAD_FEC_MDIO__FEC_MDIO,
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MX25_PAD_FEC_RDATA1__FEC_RDATA1,
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NEW_PAD_CTRL(MX25_PAD_FEC_TDATA1__FEC_TDATA1, FEC_OUT_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_D12__GPIO_4_8, 0), /* FEC_RESET_B */
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NEW_PAD_CTRL(MX25_PAD_A17__GPIO_2_3, 0), /* FEC_ENABLE_B */
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};
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static const iomux_v3_cfg_t i2c_pads[] = {
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NEW_PAD_CTRL(MX25_PAD_I2C1_CLK__I2C1_CLK, I2C_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_I2C1_DAT__I2C1_DAT, I2C_PAD_CTRL),
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};
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imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
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/* Assert RESET and ENABLE low */
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gpio_direction_output(FEC_RESET_B, 0);
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gpio_direction_output(FEC_ENABLE_B, 0);
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udelay(10);
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/* Deassert RESET and ENABLE */
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gpio_set_value(FEC_RESET_B, 1);
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gpio_set_value(FEC_ENABLE_B, 1);
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/* Setup I2C pins so that PMIC can turn on PHY supply */
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imx_iomux_v3_setup_multiple_pads(i2c_pads, ARRAY_SIZE(i2c_pads));
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}
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int dram_init(void)
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{
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/* dram_init must store complete ramsize in gd->ram_size */
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gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
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PHYS_SDRAM_1_SIZE);
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return 0;
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}
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/*
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* Set up input pins with hysteresis and 100-k pull-ups
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*/
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#define UART1_IN_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP)
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/*
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* FIXME: need to revisit this
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* The original code enabled PUE and 100-k pull-down without PKE, so the right
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* value here is likely:
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* 0 for no pull
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* or:
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* PAD_CTL_PUS_100K_DOWN for 100-k pull-down
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*/
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#define UART1_OUT_PAD_CTRL 0
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static void mx25pdk_uart1_init(void)
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{
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static const iomux_v3_cfg_t uart1_pads[] = {
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NEW_PAD_CTRL(MX25_PAD_UART1_RXD__UART1_RXD, UART1_IN_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_UART1_TXD__UART1_TXD, UART1_OUT_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_UART1_RTS__UART1_RTS, UART1_OUT_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_UART1_CTS__UART1_CTS, UART1_IN_PAD_CTRL),
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};
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imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
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}
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int board_early_init_f(void)
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{
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mx25pdk_uart1_init();
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return 0;
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}
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int board_init(void)
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{
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/* address of boot parameters */
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gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
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return 0;
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}
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int board_late_init(void)
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{
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struct pmic *p;
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int ret;
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mx25pdk_fec_init();
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ret = pmic_init(I2C_0);
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if (ret)
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return ret;
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p = pmic_get("FSL_PMIC");
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if (!p)
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return -ENODEV;
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/* Turn on Ethernet PHY and LCD supplies */
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pmic_reg_write(p, MC34704_GENERAL2_REG, ONOFFE | ONOFFA);
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return 0;
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}
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#ifdef CONFIG_FSL_ESDHC
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int board_mmc_getcd(struct mmc *mmc)
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{
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/* Set up the Card Detect pin. */
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imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX25_PAD_A15__GPIO_2_1, 0));
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gpio_direction_input(CARD_DETECT);
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return !gpio_get_value(CARD_DETECT);
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}
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int board_mmc_init(bd_t *bis)
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{
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static const iomux_v3_cfg_t sdhc1_pads[] = {
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NEW_PAD_CTRL(MX25_PAD_SD1_CMD__SD1_CMD, NO_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_SD1_CLK__SD1_CLK, NO_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_SD1_DATA0__SD1_DATA0, NO_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_SD1_DATA1__SD1_DATA1, NO_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_SD1_DATA2__SD1_DATA2, NO_PAD_CTRL),
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NEW_PAD_CTRL(MX25_PAD_SD1_DATA3__SD1_DATA3, NO_PAD_CTRL),
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};
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imx_iomux_v3_setup_multiple_pads(sdhc1_pads, ARRAY_SIZE(sdhc1_pads));
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esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
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return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
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}
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#endif
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int checkboard(void)
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{
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puts("Board: MX25PDK\n");
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return 0;
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}
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