1 /*
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  * SPDX-License-Identifier:	GPL-2.0+
11  */
12 
13 #include <common.h>
14 #include <i2c.h>
15 #include <net.h>
16 #include <netdev.h>
17 #include <watchdog.h>
18 #include <asm/io.h>
19 #include <asm/arch/hardware.h>
20 #include <asm/arch/gpio.h>
21 #include <asm/ti-common/davinci_nand.h>
22 #include <asm/arch/emac_defs.h>
23 #include <asm/arch/pinmux_defs.h>
24 #include <asm/arch/davinci_misc.h>
25 #include <asm/arch/timer_defs.h>
26 
27 DECLARE_GLOBAL_DATA_PTR;
28 
29 #define CALIMAIN_HWVERSION_MASK    0x7f000000
30 #define CALIMAIN_HWVERSION_SHIFT   24
31 
32 /* Hardware version pinmux settings */
33 const struct pinmux_config hwversion_pins[] = {
34 	{ pinmux(16), 8, 2 }, /* GP7[15] */
35 	{ pinmux(16), 8, 3 }, /* GP7[14] */
36 	{ pinmux(16), 8, 4 }, /* GP7[13] */
37 	{ pinmux(16), 8, 5 }, /* GP7[12] */
38 	{ pinmux(16), 8, 6 }, /* GP7[11] */
39 	{ pinmux(16), 8, 7 }, /* GP7[10] */
40 	{ pinmux(17), 8, 0 }, /* GP7[9] */
41 	{ pinmux(17), 8, 1 }  /* GP7[8] */
42 };
43 
44 const struct pinmux_resource pinmuxes[] = {
45 	PINMUX_ITEM(uart2_pins_txrx),
46 	PINMUX_ITEM(emac_pins_mii),
47 	PINMUX_ITEM(emac_pins_mdio),
48 	PINMUX_ITEM(emifa_pins_nor),
49 	PINMUX_ITEM(emifa_pins_cs2),
50 	PINMUX_ITEM(emifa_pins_cs3),
51 };
52 
53 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
54 
55 const struct lpsc_resource lpsc[] = {
56 	{ DAVINCI_LPSC_AEMIF },	/* NAND, NOR */
57 	{ DAVINCI_LPSC_EMAC },	/* image download */
58 	{ DAVINCI_LPSC_UART2 },	/* console */
59 	{ DAVINCI_LPSC_GPIO },
60 };
61 
62 const int lpsc_size = ARRAY_SIZE(lpsc);
63 
64 /* read board revision from GPIO7[8..14] */
65 u32 get_board_rev(void)
66 {
67 	lpsc_on(DAVINCI_LPSC_GPIO);
68 	if (davinci_configure_pin_mux(hwversion_pins,
69 				      ARRAY_SIZE(hwversion_pins)) != 0)
70 		return 0xffffffff;
71 
72 	return (davinci_gpio_bank67->in_data & CALIMAIN_HWVERSION_MASK)
73 		>> CALIMAIN_HWVERSION_SHIFT;
74 }
75 
76 /*
77  * determine the oscillator frequency depending on the board revision
78  *
79  * rev 0x00  ... 25 MHz oscillator
80  * rev 0x01  ... 24 MHz oscillator
81  */
82 int calimain_get_osc_freq(void)
83 {
84 	u32 rev;
85 	int freq;
86 
87 	rev = get_board_rev();
88 	switch (rev) {
89 	case 0x00:
90 		freq = 25000000;
91 		break;
92 	default:
93 		freq = 24000000;
94 		break;
95 	}
96 	return freq;
97 }
98 
99 int board_init(void)
100 {
101 	int val;
102 
103 #ifndef CONFIG_USE_IRQ
104 	irq_init();
105 #endif
106 
107 	/* address of boot parameters */
108 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
109 
110 #ifdef CONFIG_DRIVER_TI_EMAC
111 	/* select emac MII mode */
112 	val = readl(&davinci_syscfg_regs->cfgchip3);
113 	val &= ~(1 << 8);
114 	writel(val, &davinci_syscfg_regs->cfgchip3);
115 #endif /* CONFIG_DRIVER_TI_EMAC */
116 
117 #ifdef CONFIG_HW_WATCHDOG
118 	davinci_hw_watchdog_enable();
119 #endif
120 
121 	printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
122 	printf("Board revision:        %d\n", get_board_rev());
123 
124 	return 0;
125 }
126 
127 #ifdef CONFIG_DRIVER_TI_EMAC
128 /*
129  * Initializes on-board ethernet controllers.
130  */
131 int board_eth_init(bd_t *bis)
132 {
133 	if (!davinci_emac_initialize()) {
134 		printf("Error: Ethernet init failed!\n");
135 		return -1;
136 	}
137 
138 	return 0;
139 }
140 #endif /* CONFIG_DRIVER_TI_EMAC */
141 
142 #ifdef CONFIG_HW_WATCHDOG
143 void hw_watchdog_reset(void)
144 {
145 	davinci_hw_watchdog_reset();
146 }
147 #endif
148