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John Rigby6895d452010-01-25 23:12:58 -07001/*
2 * (C) Copyright 2009 DENX Software Engineering
3 * Author: John Rigby <jrigby@gmail.com>
4 *
5 * Based on imx27lite.c:
6 * Copyright (C) 2008,2009 Eric Jarrige <jorasse@users.sourceforge.net>
7 * Copyright (C) 2009 Ilya Yanok <yanok@emcraft.com>
8 * And:
9 * RedBoot tx25_misc.c Copyright (C) 2009 Red Hat
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 *
26 */
27#include <common.h>
28#include <asm/io.h>
29#include <asm/arch/imx-regs.h>
30#include <asm/arch/imx25-pinmux.h>
31
32static void mdelay(int n)
33{
34 while (n-- > 0)
35 udelay(1000);
36}
37
38DECLARE_GLOBAL_DATA_PTR;
39
40#ifdef CONFIG_FEC_MXC
41void tx25_fec_init(void)
42{
43 struct iomuxc_mux_ctl *muxctl;
44 struct iomuxc_pad_ctl *padctl;
45 u32 val;
46 u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
47 struct gpio_regs *gpio4 = (struct gpio_regs *)IMX_GPIO4_BASE;
48 struct gpio_regs *gpio3 = (struct gpio_regs *)IMX_GPIO3_BASE;
49 u32 saved_rdata0_mode, saved_rdata1_mode, saved_rx_dv_mode;
50
51 debug("tx25_fec_init\n");
52 /*
53 * fec pin init is generic
54 */
55 mx25_fec_init_pins();
56
57 /*
58 * Set up the FEC_RESET_B and FEC_ENABLE GPIO pins.
59 *
60 * FEC_RESET_B: gpio4[7] is ALT 5 mode of pin D13
61 * FEC_ENABLE_B: gpio4[9] is ALT 5 mode of pin D11
62 */
63 muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
64 padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
65
66 writel(gpio_mux_mode, &muxctl->pad_d13);
67 writel(gpio_mux_mode, &muxctl->pad_d11);
68
69 writel(0x0, &padctl->pad_d13);
70 writel(0x0, &padctl->pad_d11);
71
72 /* drop PHY power and assert reset (low) */
73 val = readl(&gpio4->dr) & ~((1 << 7) | (1 << 9));
74 writel(val, &gpio4->dr);
75 val = readl(&gpio4->dir) | (1 << 7) | (1 << 9);
76 writel(val, &gpio4->dir);
77
78 mdelay(5);
79
80 debug("resetting phy\n");
81
82 /* turn on PHY power leaving reset asserted */
83 val = readl(&gpio4->dr) | 1 << 9;
84 writel(val, &gpio4->dr);
85
86 mdelay(10);
87
88 /*
89 * Setup some strapping pins that are latched by the PHY
90 * as reset goes high.
91 *
92 * Set PHY mode to 111
93 * mode0 comes from FEC_RDATA0 which is GPIO 3_10 in mux mode 5
94 * mode1 comes from FEC_RDATA1 which is GPIO 3_11 in mux mode 5
95 * mode2 is tied high so nothing to do
96 *
97 * Turn on RMII mode
98 * RMII mode is selected by FEC_RX_DV which is GPIO 3_12 in mux mode
99 */
100 /*
101 * save three current mux modes and set each to gpio mode
102 */
103 saved_rdata0_mode = readl(&muxctl->pad_fec_rdata0);
104 saved_rdata1_mode = readl(&muxctl->pad_fec_rdata1);
105 saved_rx_dv_mode = readl(&muxctl->pad_fec_rx_dv);
106
107 writel(gpio_mux_mode, &muxctl->pad_fec_rdata0);
108 writel(gpio_mux_mode, &muxctl->pad_fec_rdata1);
109 writel(gpio_mux_mode, &muxctl->pad_fec_rx_dv);
110
111 /*
112 * set each to 1 and make each an output
113 */
114 val = readl(&gpio3->dr) | (1 << 10) | (1 << 11) | (1 << 12);
115 writel(val, &gpio3->dr);
116 val = readl(&gpio3->dir) | (1 << 10) | (1 << 11) | (1 << 12);
117 writel(val, &gpio3->dir);
118
119 mdelay(22); /* this value came from RedBoot */
120
121 /*
122 * deassert PHY reset
123 */
124 val = readl(&gpio4->dr) | 1 << 7;
125 writel(val, &gpio4->dr);
126 writel(val, &gpio4->dr);
127
128 mdelay(5);
129
130 /*
131 * set FEC pins back
132 */
133 writel(saved_rdata0_mode, &muxctl->pad_fec_rdata0);
134 writel(saved_rdata1_mode, &muxctl->pad_fec_rdata1);
135 writel(saved_rx_dv_mode, &muxctl->pad_fec_rx_dv);
136}
137#else
138#define tx25_fec_init()
139#endif
140
141int board_init()
142{
143#ifdef CONFIG_MXC_UART
144 extern void mx25_uart_init_pins(void);
145
146 mx25_uart_init_pins();
147#endif
Anatolij Gustschin87db58d2010-04-21 13:52:38 +0200148 /* board id for linux */
149 gd->bd->bi_arch_number = MACH_TYPE_TX25;
150 gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
John Rigby6895d452010-01-25 23:12:58 -0700151 return 0;
152}
153
154int board_late_init(void)
155{
156 tx25_fec_init();
157 return 0;
158}
159
160int dram_init (void)
161{
Heiko Schocherab86f722010-09-17 13:10:42 +0200162 /* dram_init must store complete ramsize in gd->ram_size */
163 gd->ram_size = get_ram_size((volatile void *)PHYS_SDRAM_1,
164 PHYS_SDRAM_1_SIZE);
165 return 0;
166}
John Rigby6895d452010-01-25 23:12:58 -0700167
Heiko Schocherab86f722010-09-17 13:10:42 +0200168void dram_init_banksize(void)
169{
John Rigby6895d452010-01-25 23:12:58 -0700170 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
171 gd->bd->bi_dram[0].size = get_ram_size((volatile void *)PHYS_SDRAM_1,
172 PHYS_SDRAM_1_SIZE);
173#if CONFIG_NR_DRAM_BANKS > 1
174 gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
175 gd->bd->bi_dram[1].size = get_ram_size((volatile void *)PHYS_SDRAM_2,
176 PHYS_SDRAM_2_SIZE);
Heiko Schocherab86f722010-09-17 13:10:42 +0200177#else
John Rigby6895d452010-01-25 23:12:58 -0700178
Heiko Schocherab86f722010-09-17 13:10:42 +0200179#endif
John Rigby6895d452010-01-25 23:12:58 -0700180}
181
182int checkboard(void)
183{
184 printf("KARO TX25\n");
185 return 0;
186}