u-boot/board/freescale/mx25pdk/mx25pdk.c
Fabio Estevam e00c89df06 mx25pdk: Add Ethernet support
mx25pdk has a Ethernet port that is connected to its internal FEC controller.

In order to power up the Ethernet PHY (DP83640) it is necessary to communicate
with the MC34704 PMIC via I2C.

Make the FEC ethernet port functional

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
2012-10-26 16:28:08 +02:00

170 lines
4.1 KiB
C

/*
* (C) Copyright 2011 Freescale Semiconductor, Inc.
*
* Author: Fabio Estevam <fabio.estevam@freescale.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/imx25-pinmux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/clock.h>
#include <mmc.h>
#include <fsl_esdhc.h>
#include <i2c.h>
#include <pmic.h>
#include <fsl_pmic.h>
#include <mc34704.h>
#define FEC_RESET_B IMX_GPIO_NR(2, 3)
#define FEC_ENABLE_B IMX_GPIO_NR(4, 8)
#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
static void mx25pdk_fec_init(void)
{
struct iomuxc_mux_ctl *muxctl;
struct iomuxc_pad_ctl *padctl;
u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
u32 gpio_mux_mode0_sion = MX25_PIN_MUX_MODE(0) | MX25_PIN_MUX_SION;
/* FEC pin init is generic */
mx25_fec_init_pins();
muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
/*
* Set up FEC_RESET_B and FEC_ENABLE_B
*
* FEC_RESET_B: gpio2_3 is ALT 5 mode of pin D12
* FEC_ENABLE_B: gpio4_8 is ALT 5 mode of pin A17
*/
writel(gpio_mux_mode, &muxctl->pad_d12);
writel(gpio_mux_mode, &muxctl->pad_a17);
writel(0x0, &padctl->pad_d12);
writel(0x0, &padctl->pad_a17);
/* 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 */
writel(gpio_mux_mode0_sion, &muxctl->pad_i2c1_clk);
writel(gpio_mux_mode0_sion, &muxctl->pad_i2c1_dat);
writel(0x1E8, &padctl->pad_i2c1_clk);
writel(0x1E8, &padctl->pad_i2c1_dat);
}
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;
}
int board_early_init_f(void)
{
mx25_uart1_init_pins();
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;
mx25pdk_fec_init();
pmic_init();
p = get_pmic();
/* 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)
{
struct iomuxc_mux_ctl *muxctl;
struct iomuxc_pad_ctl *padctl;
u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
/*
* Set up the Card Detect pin.
*
* SD1_GPIO_CD: gpio2_1 is ALT 5 mode of pin A15
*
*/
muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
writel(gpio_mux_mode, &muxctl->pad_a15);
writel(0x0, &padctl->pad_a15);
gpio_direction_input(CARD_DETECT);
return !gpio_get_value(CARD_DETECT);
}
int board_mmc_init(bd_t *bis)
{
struct iomuxc_mux_ctl *muxctl;
u32 sdhc1_mux_mode = MX25_PIN_MUX_MODE(0) | MX25_PIN_MUX_SION;
muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
writel(sdhc1_mux_mode, &muxctl->pad_sd1_cmd);
writel(sdhc1_mux_mode, &muxctl->pad_sd1_clk);
writel(sdhc1_mux_mode, &muxctl->pad_sd1_data0);
writel(sdhc1_mux_mode, &muxctl->pad_sd1_data1);
writel(sdhc1_mux_mode, &muxctl->pad_sd1_data2);
writel(sdhc1_mux_mode, &muxctl->pad_sd1_data3);
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;
}