1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2011 OMICRON electronics GmbH
4  *
5  * Based on da850evm.c. Original Copyrights follow:
6  *
7  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
8  * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
9  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
10  */
11 
12 #include <common.h>
13 #include <i2c.h>
14 #include <net.h>
15 #include <netdev.h>
16 #include <watchdog.h>
17 #include <asm/io.h>
18 #include <asm/arch/hardware.h>
19 #include <asm/arch/gpio.h>
20 #include <asm/ti-common/davinci_nand.h>
21 #include <asm/arch/emac_defs.h>
22 #include <asm/arch/pinmux_defs.h>
23 #include <asm/arch/davinci_misc.h>
24 #include <asm/arch/timer_defs.h>
25 
26 DECLARE_GLOBAL_DATA_PTR;
27 
28 #define CALIMAIN_HWVERSION_MASK    0x7f000000
29 #define CALIMAIN_HWVERSION_SHIFT   24
30 
31 /* Hardware version pinmux settings */
32 const struct pinmux_config hwversion_pins[] = {
33 	{ pinmux(16), 8, 2 }, /* GP7[15] */
34 	{ pinmux(16), 8, 3 }, /* GP7[14] */
35 	{ pinmux(16), 8, 4 }, /* GP7[13] */
36 	{ pinmux(16), 8, 5 }, /* GP7[12] */
37 	{ pinmux(16), 8, 6 }, /* GP7[11] */
38 	{ pinmux(16), 8, 7 }, /* GP7[10] */
39 	{ pinmux(17), 8, 0 }, /* GP7[9] */
40 	{ pinmux(17), 8, 1 }  /* GP7[8] */
41 };
42 
43 const struct pinmux_resource pinmuxes[] = {
44 	PINMUX_ITEM(uart2_pins_txrx),
45 	PINMUX_ITEM(emac_pins_mii),
46 	PINMUX_ITEM(emac_pins_mdio),
47 	PINMUX_ITEM(emifa_pins_nor),
48 	PINMUX_ITEM(emifa_pins_cs2),
49 	PINMUX_ITEM(emifa_pins_cs3),
50 };
51 
52 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
53 
54 const struct lpsc_resource lpsc[] = {
55 	{ DAVINCI_LPSC_AEMIF },	/* NAND, NOR */
56 	{ DAVINCI_LPSC_EMAC },	/* image download */
57 	{ DAVINCI_LPSC_UART2 },	/* console */
58 	{ DAVINCI_LPSC_GPIO },
59 };
60 
61 const int lpsc_size = ARRAY_SIZE(lpsc);
62 
63 /* read board revision from GPIO7[8..14] */
64 u32 get_board_rev(void)
65 {
66 	lpsc_on(DAVINCI_LPSC_GPIO);
67 	if (davinci_configure_pin_mux(hwversion_pins,
68 				      ARRAY_SIZE(hwversion_pins)) != 0)
69 		return 0xffffffff;
70 
71 	return (davinci_gpio_bank67->in_data & CALIMAIN_HWVERSION_MASK)
72 		>> CALIMAIN_HWVERSION_SHIFT;
73 }
74 
75 /*
76  * determine the oscillator frequency depending on the board revision
77  *
78  * rev 0x00  ... 25 MHz oscillator
79  * rev 0x01  ... 24 MHz oscillator
80  */
81 int calimain_get_osc_freq(void)
82 {
83 	u32 rev;
84 	int freq;
85 
86 	rev = get_board_rev();
87 	switch (rev) {
88 	case 0x00:
89 		freq = 25000000;
90 		break;
91 	default:
92 		freq = 24000000;
93 		break;
94 	}
95 	return freq;
96 }
97 
98 int board_init(void)
99 {
100 	int val;
101 
102 	irq_init();
103 
104 	/* address of boot parameters */
105 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
106 
107 #ifdef CONFIG_DRIVER_TI_EMAC
108 	/* select emac MII mode */
109 	val = readl(&davinci_syscfg_regs->cfgchip3);
110 	val &= ~(1 << 8);
111 	writel(val, &davinci_syscfg_regs->cfgchip3);
112 #endif /* CONFIG_DRIVER_TI_EMAC */
113 
114 #ifdef CONFIG_HW_WATCHDOG
115 	davinci_hw_watchdog_enable();
116 #endif
117 
118 	printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
119 	printf("Board revision:        %d\n", get_board_rev());
120 
121 	return 0;
122 }
123 
124 #ifdef CONFIG_DRIVER_TI_EMAC
125 /*
126  * Initializes on-board ethernet controllers.
127  */
128 int board_eth_init(bd_t *bis)
129 {
130 	if (!davinci_emac_initialize()) {
131 		printf("Error: Ethernet init failed!\n");
132 		return -1;
133 	}
134 
135 	return 0;
136 }
137 #endif /* CONFIG_DRIVER_TI_EMAC */
138 
139 #ifdef CONFIG_HW_WATCHDOG
140 void hw_watchdog_reset(void)
141 {
142 	davinci_hw_watchdog_reset();
143 }
144 #endif
145