u-boot/board/freescale/mx25pdk/mx25pdk.c
Fabio Estevam 570aa2fac3 imx: Explicitly pass the I2C bus number in pmic_init()
The pmic_init() function has the I2C or SPI bus number that is connected to the
PMIC.

Instead of passing I2C_PMIC, explicitly pass the I2C bus number via I2C_x
definition.

The motivation for doing this is to avoid people just doing a copy and paste
of I2C_PMIC into their board file when another I2C bus is actually used to
interface to their PMIC.

This also makes more obvious which is the I2C bus connected to the PMIC, without
having to search in the source code for the meaning of the 'I2C_PMIC' number.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
2013-12-17 16:54:16 +01:00

188 lines
4.5 KiB
C

/*
* (C) Copyright 2011 Freescale Semiconductor, Inc.
*
* Author: Fabio Estevam <fabio.estevam@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux-mx25.h>
#include <asm/arch/clock.h>
#include <mmc.h>
#include <fsl_esdhc.h>
#include <i2c.h>
#include <power/pmic.h>
#include <fsl_pmic.h>
#include <mc34704.h>
#define FEC_RESET_B IMX_GPIO_NR(4, 8)
#define FEC_ENABLE_B IMX_GPIO_NR(2, 3)
#define CARD_DETECT IMX_GPIO_NR(2, 1)
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_FSL_ESDHC
struct fsl_esdhc_cfg esdhc_cfg[1] = {
{IMX_MMC_SDHC1_BASE},
};
#endif
/*
* 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 I2C_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | \
PAD_CTL_ODE)
static void mx25pdk_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_D12__GPIO_4_8, 0), /* FEC_RESET_B */
NEW_PAD_CTRL(MX25_PAD_A17__GPIO_2_3, 0), /* FEC_ENABLE_B */
};
static const iomux_v3_cfg_t i2c_pads[] = {
NEW_PAD_CTRL(MX25_PAD_I2C1_CLK__I2C1_CLK, I2C_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_I2C1_DAT__I2C1_DAT, I2C_PAD_CTRL),
};
imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
/* Assert RESET and ENABLE low */
gpio_direction_output(FEC_RESET_B, 0);
gpio_direction_output(FEC_ENABLE_B, 0);
udelay(10);
/* Deassert RESET and ENABLE */
gpio_set_value(FEC_RESET_B, 1);
gpio_set_value(FEC_ENABLE_B, 1);
/* Setup I2C pins so that PMIC can turn on PHY supply */
imx_iomux_v3_setup_multiple_pads(i2c_pads, ARRAY_SIZE(i2c_pads));
}
int dram_init(void)
{
/* dram_init must store complete ramsize in gd->ram_size */
gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
PHYS_SDRAM_1_SIZE);
return 0;
}
/*
* 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 mx25pdk_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));
}
int board_early_init_f(void)
{
mx25pdk_uart1_init();
return 0;
}
int board_init(void)
{
/* address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
return 0;
}
int board_late_init(void)
{
struct pmic *p;
int ret;
mx25pdk_fec_init();
ret = pmic_init(I2C_0);
if (ret)
return ret;
p = pmic_get("FSL_PMIC");
if (!p)
return -ENODEV;
/* Turn on Ethernet PHY supply */
pmic_reg_write(p, MC34704_GENERAL2_REG, ONOFFE);
return 0;
}
#ifdef CONFIG_FSL_ESDHC
int board_mmc_getcd(struct mmc *mmc)
{
/* Set up the Card Detect pin. */
imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX25_PAD_A15__GPIO_2_1, 0));
gpio_direction_input(CARD_DETECT);
return !gpio_get_value(CARD_DETECT);
}
int board_mmc_init(bd_t *bis)
{
static const iomux_v3_cfg_t sdhc1_pads[] = {
NEW_PAD_CTRL(MX25_PAD_SD1_CMD__SD1_CMD, NO_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_SD1_CLK__SD1_CLK, NO_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_SD1_DATA0__SD1_DATA0, NO_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_SD1_DATA1__SD1_DATA1, NO_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_SD1_DATA2__SD1_DATA2, NO_PAD_CTRL),
NEW_PAD_CTRL(MX25_PAD_SD1_DATA3__SD1_DATA3, NO_PAD_CTRL),
};
imx_iomux_v3_setup_multiple_pads(sdhc1_pads, ARRAY_SIZE(sdhc1_pads));
esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
}
#endif
int checkboard(void)
{
puts("Board: MX25PDK\n");
return 0;
}