diff options
Diffstat (limited to 'board/karo/tx25/tx25.c')
| -rw-r--r-- | board/karo/tx25/tx25.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/board/karo/tx25/tx25.c b/board/karo/tx25/tx25.c new file mode 100644 index 0000000..4d6a96d --- /dev/null +++ b/board/karo/tx25/tx25.c @@ -0,0 +1,176 @@ +/* + * (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 + 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; +} |