xref: /openbmc/u-boot/board/lego/ev3/legoev3.c (revision 85ab0452)
1 /*
2  * Copyright (C) 2016 David Lechner <david@lechnology.com>
3  *
4  * Based on da850evm.c
5  *
6  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
7  *
8  * Based on da830evm.c. Original Copyrights follow:
9  *
10  * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
11  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
12  *
13  * SPDX-License-Identifier:	GPL-2.0+
14  */
15 
16 #include <common.h>
17 #include <i2c.h>
18 #include <net.h>
19 #include <netdev.h>
20 #include <spi.h>
21 #include <spi_flash.h>
22 #include <asm/arch/hardware.h>
23 #include <asm/arch/pinmux_defs.h>
24 #include <asm/io.h>
25 #include <asm/arch/davinci_misc.h>
26 #include <linux/errno.h>
27 #include <hwconfig.h>
28 #include <asm/mach-types.h>
29 #include <asm/setup.h>
30 
31 #ifdef CONFIG_MMC_DAVINCI
32 #include <mmc.h>
33 #include <asm/arch/sdmmc_defs.h>
34 #endif
35 
36 DECLARE_GLOBAL_DATA_PTR;
37 
38 u8 board_rev;
39 
40 #define EEPROM_I2C_ADDR		0x50
41 #define EEPROM_REV_OFFSET	0x3F00
42 #define EEPROM_MAC_OFFSET	0x3F06
43 
44 #ifdef CONFIG_MMC_DAVINCI
45 static struct davinci_mmc mmc_sd0 = {
46 	.reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE,
47 	.host_caps = MMC_MODE_4BIT,     /* DA850 supports only 4-bit SD/MMC */
48 	.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
49 	.version = MMC_CTLR_VERSION_2,
50 };
51 
52 int board_mmc_init(bd_t *bis)
53 {
54 	mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID);
55 
56 	/* Add slot-0 to mmc subsystem */
57 	return davinci_mmc_init(bis, &mmc_sd0);
58 }
59 #endif
60 
61 const struct pinmux_resource pinmuxes[] = {
62 	PINMUX_ITEM(spi0_pins_base),
63 	PINMUX_ITEM(spi0_pins_scs0),
64 	PINMUX_ITEM(uart1_pins_txrx),
65 	PINMUX_ITEM(i2c0_pins),
66 	PINMUX_ITEM(mmc0_pins),
67 };
68 
69 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
70 
71 const struct lpsc_resource lpsc[] = {
72 	{ DAVINCI_LPSC_SPI0 },	/* Serial Flash */
73 	{ DAVINCI_LPSC_UART1 },	/* console */
74 	{ DAVINCI_LPSC_MMC_SD },
75 };
76 
77 const int lpsc_size = ARRAY_SIZE(lpsc);
78 
79 u32 get_board_rev(void)
80 {
81 	u8 buf[2];
82 
83 	if (!board_rev) {
84 		if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
85 			printf("\nBoard revision read failed!\n");
86 		} else {
87 			/*
88 			 * Board rev 3 has MAC address at EEPROM_REV_OFFSET.
89 			 * Other revisions have checksum at EEPROM_REV_OFFSET+1
90 			 * to detect this.
91 			 */
92 			if ((buf[0] ^ buf[1]) == 0xFF)
93 				board_rev = buf[0];
94 			else
95 				board_rev = 3;
96 		}
97 	}
98 
99 	return board_rev;
100 }
101 
102 /*
103  * The Bluetooth MAC address serves as the board serial number.
104  */
105 void get_board_serial(struct tag_serialnr *serialnr)
106 {
107 	u32 offset;
108 	u8 buf[6];
109 
110 	if (!board_rev)
111 		board_rev = get_board_rev();
112 
113 	/* Board rev 3 has MAC address where rev should be */
114 	offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
115 
116 	if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
117 		printf("\nBoard serial read failed!\n");
118 	} else {
119 		u8 *nr;
120 
121 		nr = (u8 *)&serialnr->low;
122 		nr[0] = buf[5];
123 		nr[1] = buf[4];
124 		nr[2] = buf[3];
125 		nr[3] = buf[2];
126 		nr = (u8 *)&serialnr->high;
127 		nr[0] = buf[1];
128 		nr[1] = buf[0];
129 		nr[2] = 0;
130 		nr[3] = 0;
131 	}
132 }
133 
134 int board_early_init_f(void)
135 {
136 	/*
137 	 * Power on required peripherals
138 	 * ARM does not have access by default to PSC0 and PSC1
139 	 * assuming here that the DSP bootloader has set the IOPU
140 	 * such that PSC access is available to ARM
141 	 */
142 	if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
143 		return 1;
144 
145 	return 0;
146 }
147 
148 int board_init(void)
149 {
150 	irq_init();
151 
152 	/* arch number of the board */
153 	/* LEGO didn't register for a unique number and uses da850evm */
154 	gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
155 
156 	/* address of boot parameters */
157 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
158 
159 	/* setup the SUSPSRC for ARM to control emulation suspend */
160 	writel(readl(&davinci_syscfg_regs->suspsrc) &
161 	       ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
162 		 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
163 		 DAVINCI_SYSCFG_SUSPSRC_UART1),
164 	       &davinci_syscfg_regs->suspsrc);
165 
166 	/* configure pinmux settings */
167 	if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
168 		return 1;
169 
170 	/* enable the console UART */
171 	writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
172 		DAVINCI_UART_PWREMU_MGMT_UTRST),
173 	       &davinci_uart1_ctrl_regs->pwremu_mgmt);
174 
175 	return 0;
176 }
177