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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
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/imx25-pinmux.h>
static void mdelay(int n)
{
while (n-- > 0)
udelay(1000);
}
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_FEC_MXC
void tx25_fec_init(void)
{
struct iomuxc_mux_ctl *muxctl;
struct iomuxc_pad_ctl *padctl;
u32 val;
u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
struct gpio_regs *gpio4 = (struct gpio_regs *)IMX_GPIO4_BASE;
struct gpio_regs *gpio3 = (struct gpio_regs *)IMX_GPIO3_BASE;
u32 saved_rdata0_mode, saved_rdata1_mode, saved_rx_dv_mode;
debug("tx25_fec_init\n");
/*
* fec pin init is generic
*/
mx25_fec_init_pins();
/*
* Set up the FEC_RESET_B and FEC_ENABLE GPIO pins.
*
* FEC_RESET_B: gpio4[7] is ALT 5 mode of pin D13
* FEC_ENABLE_B: gpio4[9] is ALT 5 mode of pin D11
*/
muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
writel(gpio_mux_mode, &muxctl->pad_d13);
writel(gpio_mux_mode, &muxctl->pad_d11);
writel(0x0, &padctl->pad_d13);
writel(0x0, &padctl->pad_d11);
/* drop PHY power and assert reset (low) */
val = readl(&gpio4->dr) & ~((1 << 7) | (1 << 9));
writel(val, &gpio4->dr);
val = readl(&gpio4->dir) | (1 << 7) | (1 << 9);
writel(val, &gpio4->dir);
mdelay(5);
debug("resetting phy\n");
/* turn on PHY power leaving reset asserted */
val = readl(&gpio4->dr) | 1 << 9;
writel(val, &gpio4->dr);
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
*/
/*
* save three current mux modes and set each to gpio mode
*/
saved_rdata0_mode = readl(&muxctl->pad_fec_rdata0);
saved_rdata1_mode = readl(&muxctl->pad_fec_rdata1);
saved_rx_dv_mode = readl(&muxctl->pad_fec_rx_dv);
writel(gpio_mux_mode, &muxctl->pad_fec_rdata0);
writel(gpio_mux_mode, &muxctl->pad_fec_rdata1);
writel(gpio_mux_mode, &muxctl->pad_fec_rx_dv);
/*
* set each to 1 and make each an output
*/
val = readl(&gpio3->dr) | (1 << 10) | (1 << 11) | (1 << 12);
writel(val, &gpio3->dr);
val = readl(&gpio3->dir) | (1 << 10) | (1 << 11) | (1 << 12);
writel(val, &gpio3->dir);
mdelay(22); /* this value came from RedBoot */
/*
* deassert PHY reset
*/
val = readl(&gpio4->dr) | 1 << 7;
writel(val, &gpio4->dr);
writel(val, &gpio4->dr);
mdelay(5);
/*
* set FEC pins back
*/
writel(saved_rdata0_mode, &muxctl->pad_fec_rdata0);
writel(saved_rdata1_mode, &muxctl->pad_fec_rdata1);
writel(saved_rx_dv_mode, &muxctl->pad_fec_rx_dv);
}
#else
#define tx25_fec_init()
#endif
int board_init()
{
#ifdef CONFIG_MXC_UART
extern void mx25_uart_init_pins(void);
mx25_uart_init_pins();
#endif
/* board id for linux */
gd->bd->bi_arch_number = MACH_TYPE_TX25;
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)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = get_ram_size((volatile 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((volatile void *)PHYS_SDRAM_2,
PHYS_SDRAM_2_SIZE);
#endif
return 0;
}
int checkboard(void)
{
printf("KARO TX25\n");
return 0;
}
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