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Christian Riesch9a3aae22012-02-02 00:44:42 +00001/*
2 * Copyright (C) 2011 OMICRON electronics GmbH
3 *
4 * Based on da850evm.c. Original Copyrights follow:
5 *
6 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
7 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
8 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25#include <common.h>
26#include <i2c.h>
27#include <net.h>
28#include <netdev.h>
29#include <watchdog.h>
30#include <asm/io.h>
31#include <asm/arch/hardware.h>
32#include <asm/arch/gpio.h>
33#include <asm/arch/emif_defs.h>
34#include <asm/arch/emac_defs.h>
35#include <asm/arch/pinmux_defs.h>
36#include <asm/arch/davinci_misc.h>
37#include <asm/arch/timer_defs.h>
38
39DECLARE_GLOBAL_DATA_PTR;
40
41#define CALIMAIN_HWVERSION_MASK 0x7f000000
42#define CALIMAIN_HWVERSION_SHIFT 24
43
44/* Hardware version pinmux settings */
45const struct pinmux_config hwversion_pins[] = {
46 { pinmux(16), 8, 2 }, /* GP7[15] */
47 { pinmux(16), 8, 3 }, /* GP7[14] */
48 { pinmux(16), 8, 4 }, /* GP7[13] */
49 { pinmux(16), 8, 5 }, /* GP7[12] */
50 { pinmux(16), 8, 6 }, /* GP7[11] */
51 { pinmux(16), 8, 7 }, /* GP7[10] */
52 { pinmux(17), 8, 0 }, /* GP7[9] */
53 { pinmux(17), 8, 1 } /* GP7[8] */
54};
55
56const struct pinmux_resource pinmuxes[] = {
57 PINMUX_ITEM(uart2_pins_txrx),
58 PINMUX_ITEM(emac_pins_mii),
59 PINMUX_ITEM(emac_pins_mdio),
60 PINMUX_ITEM(emifa_pins_nor),
61 PINMUX_ITEM(emifa_pins_cs2),
62 PINMUX_ITEM(emifa_pins_cs3),
63};
64
65const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
66
67const struct lpsc_resource lpsc[] = {
68 { DAVINCI_LPSC_AEMIF }, /* NAND, NOR */
69 { DAVINCI_LPSC_EMAC }, /* image download */
70 { DAVINCI_LPSC_UART2 }, /* console */
71 { DAVINCI_LPSC_GPIO },
72};
73
74const int lpsc_size = ARRAY_SIZE(lpsc);
75
76/* read board revision from GPIO7[8..14] */
77u32 get_board_rev(void)
78{
79 lpsc_on(DAVINCI_LPSC_GPIO);
80 if (davinci_configure_pin_mux(hwversion_pins,
81 ARRAY_SIZE(hwversion_pins)) != 0)
82 return 0xffffffff;
83
84 return (davinci_gpio_bank67->in_data & CALIMAIN_HWVERSION_MASK)
85 >> CALIMAIN_HWVERSION_SHIFT;
86}
87
88/*
89 * determine the oscillator frequency depending on the board revision
90 *
91 * rev 0x00 ... 25 MHz oscillator
92 * rev 0x01 ... 24 MHz oscillator
93 */
94int calimain_get_osc_freq(void)
95{
96 u32 rev;
97 int freq;
98
99 rev = get_board_rev();
100 switch (rev) {
101 case 0x00:
102 freq = 25000000;
103 break;
104 default:
105 freq = 24000000;
106 break;
107 }
108 return freq;
109}
110
111int board_init(void)
112{
113 int val;
114
115#ifndef CONFIG_USE_IRQ
116 irq_init();
117#endif
118
119 /* address of boot parameters */
120 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
121
122#ifdef CONFIG_DRIVER_TI_EMAC
123 /* select emac MII mode */
124 val = readl(&davinci_syscfg_regs->cfgchip3);
125 val &= ~(1 << 8);
126 writel(val, &davinci_syscfg_regs->cfgchip3);
127#endif /* CONFIG_DRIVER_TI_EMAC */
128
129#ifdef CONFIG_HW_WATCHDOG
130 davinci_hw_watchdog_enable();
131#endif
132
133 printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
134 printf("Board revision: %d\n", get_board_rev());
135
136 return 0;
137}
138
139#ifdef CONFIG_DRIVER_TI_EMAC
140/*
141 * Initializes on-board ethernet controllers.
142 */
143int board_eth_init(bd_t *bis)
144{
145 if (!davinci_emac_initialize()) {
146 printf("Error: Ethernet init failed!\n");
147 return -1;
148 }
149
150 return 0;
151}
152#endif /* CONFIG_DRIVER_TI_EMAC */
153
154#ifdef CONFIG_HW_WATCHDOG
155void hw_watchdog_reset(void)
156{
157 davinci_hw_watchdog_reset();
158}
159#endif