1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 David Lechner <david@lechnology.com>
4 *
5 * Based on da850evm.c
6 *
7 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
8 *
9 * Based on da830evm.c. Original Copyrights follow:
10 *
11 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
12 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
13 */
14
15 #include <common.h>
16 #include <env.h>
17 #include <i2c.h>
18 #include <init.h>
19 #include <spi.h>
20 #include <spi_flash.h>
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/pinmux_defs.h>
23 #include <asm/global_data.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 DECLARE_GLOBAL_DATA_PTR;
32
33 #define EEPROM_I2C_ADDR 0x50
34 #define EEPROM_REV_OFFSET 0x3F00
35 #define EEPROM_BDADDR_OFFSET 0x3F06
36
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),
43 };
44
45 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
46
47 const struct lpsc_resource lpsc[] = {
48 { DAVINCI_LPSC_SPI0 }, /* Serial Flash */
49 { DAVINCI_LPSC_UART1 }, /* console */
50 { DAVINCI_LPSC_MMC_SD },
51 };
52
53 const int lpsc_size = ARRAY_SIZE(lpsc);
54
55 /*
56 * The Bluetooth address serves as the board serial number.
57 */
setup_serial_number(void)58 static void setup_serial_number(void)
59 {
60 u32 offset;
61 char serial_number[13];
62 u8 buf[6];
63 u8 eeprom_rev;
64
65 if (env_get("serial#"))
66 return;
67
68 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
69 printf("\nEEPROM revision read failed!\n");
70 return;
71 }
72
73 /*
74 * EEPROM rev 3 has Bluetooth address at EEPROM_REV_OFFSET.
75 * Other revisions have checksum at EEPROM_REV_OFFSET+1
76 * to detect this.
77 */
78 if ((buf[0] ^ buf[1]) == 0xFF)
79 eeprom_rev = buf[0];
80 else
81 eeprom_rev = 3;
82
83 /* EEPROM rev 3 has Bluetooth address where rev should be */
84 offset = (eeprom_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_BDADDR_OFFSET;
85
86 if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
87 printf("\nEEPROM serial read failed!\n");
88 return;
89 }
90
91 sprintf(serial_number, "%02X%02X%02X%02X%02X%02X",
92 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
93
94 env_set("serial#", serial_number);
95 }
96
board_early_init_f(void)97 int board_early_init_f(void)
98 {
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);
103
104 /*
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
109 */
110 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
111 return 1;
112
113 return 0;
114 }
115
board_init(void)116 int board_init(void)
117 {
118 irq_init();
119
120 /* address of boot parameters */
121 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
122
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);
129
130 /* configure pinmux settings */
131 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
132 return 1;
133
134 return 0;
135 }
136
board_late_init(void)137 int board_late_init(void)
138 {
139 setup_serial_number();
140
141 return 0;
142 }
143