1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 David Lechner <david@lechnology.com>
7 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
9 * Based on da830evm.c. Original Copyrights follow:
11 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
12 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
20 #include <spi_flash.h>
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/pinmux_defs.h>
23 #include <asm/global_data.h>
25 #include <asm/arch/davinci_misc.h>
26 #include <linux/errno.h>
28 #include <asm/mach-types.h>
29 #include <asm/setup.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 #define EEPROM_I2C_ADDR 0x50
34 #define EEPROM_REV_OFFSET 0x3F00
35 #define EEPROM_BDADDR_OFFSET 0x3F06
37 const struct pinmux_resource pinmuxes[] = {
38 PINMUX_ITEM(spi0_pins_base),
39 PINMUX_ITEM(spi0_pins_scs0),
40 PINMUX_ITEM(uart1_pins_txrx),
41 PINMUX_ITEM(i2c0_pins),
42 PINMUX_ITEM(mmc0_pins),
45 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
47 const struct lpsc_resource lpsc[] = {
48 { DAVINCI_LPSC_SPI0 }, /* Serial Flash */
49 { DAVINCI_LPSC_UART1 }, /* console */
50 { DAVINCI_LPSC_MMC_SD },
53 const int lpsc_size = ARRAY_SIZE(lpsc);
56 * The Bluetooth address serves as the board serial number.
58 static void setup_serial_number(void)
61 char serial_number[13];
65 if (env_get("serial#"))
68 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
69 printf("\nEEPROM revision read failed!\n");
74 * EEPROM rev 3 has Bluetooth address at EEPROM_REV_OFFSET.
75 * Other revisions have checksum at EEPROM_REV_OFFSET+1
78 if ((buf[0] ^ buf[1]) == 0xFF)
83 /* EEPROM rev 3 has Bluetooth address where rev should be */
84 offset = (eeprom_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_BDADDR_OFFSET;
86 if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
87 printf("\nEEPROM serial read failed!\n");
91 sprintf(serial_number, "%02X%02X%02X%02X%02X%02X",
92 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
94 env_set("serial#", serial_number);
97 int board_early_init_f(void)
99 /* enable the console UART */
100 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
101 DAVINCI_UART_PWREMU_MGMT_UTRST),
102 &davinci_uart1_ctrl_regs->pwremu_mgmt);
105 * Power on required peripherals
106 * ARM does not have access by default to PSC0 and PSC1
107 * assuming here that the DSP bootloader has set the IOPU
108 * such that PSC access is available to ARM
110 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
120 /* address of boot parameters */
121 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
123 /* setup the SUSPSRC for ARM to control emulation suspend */
124 writel(readl(&davinci_syscfg_regs->suspsrc) &
125 ~(DAVINCI_SYSCFG_SUSPSRC_I2C |
126 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
127 DAVINCI_SYSCFG_SUSPSRC_UART1),
128 &davinci_syscfg_regs->suspsrc);
130 /* configure pinmux settings */
131 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
137 int board_late_init(void)
139 setup_serial_number();