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 	irq_init();
104 
105 	/* address of boot parameters */
106 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
107 
108 #ifdef CONFIG_DRIVER_TI_EMAC
109 	/* select emac MII mode */
110 	val = readl(&davinci_syscfg_regs->cfgchip3);
111 	val &= ~(1 << 8);
112 	writel(val, &davinci_syscfg_regs->cfgchip3);
113 #endif /* CONFIG_DRIVER_TI_EMAC */
114 
115 #ifdef CONFIG_HW_WATCHDOG
116 	davinci_hw_watchdog_enable();
117 #endif
118 
119 	printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
120 	printf("Board revision:        %d\n", get_board_rev());
121 
122 	return 0;
123 }
124 
125 #ifdef CONFIG_DRIVER_TI_EMAC
126 /*
127  * Initializes on-board ethernet controllers.
128  */
129 int board_eth_init(bd_t *bis)
130 {
131 	if (!davinci_emac_initialize()) {
132 		printf("Error: Ethernet init failed!\n");
133 		return -1;
134 	}
135 
136 	return 0;
137 }
138 #endif /* CONFIG_DRIVER_TI_EMAC */
139 
140 #ifdef CONFIG_HW_WATCHDOG
141 void hw_watchdog_reset(void)
142 {
143 	davinci_hw_watchdog_reset();
144 }
145 #endif
146