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 - https://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 <config.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 #include <dm/uclass.h>
31
32 DECLARE_GLOBAL_DATA_PTR;
33
34 #define EEPROM_I2C_ADDR 0x50
35 #define EEPROM_REV_OFFSET 0x3F00
36 #define EEPROM_BDADDR_OFFSET 0x3F06
37
38 const struct pinmux_resource pinmuxes[] = {
39 PINMUX_ITEM(spi0_pins_base),
40 PINMUX_ITEM(spi0_pins_scs0),
41 PINMUX_ITEM(uart1_pins_txrx),
42 PINMUX_ITEM(i2c0_pins),
43 PINMUX_ITEM(mmc0_pins),
44 };
45
46 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
47
48 const struct lpsc_resource lpsc[] = {
49 { DAVINCI_LPSC_SPI0 }, /* Serial Flash */
50 { DAVINCI_LPSC_UART1 }, /* console */
51 { DAVINCI_LPSC_MMC_SD },
52 };
53
54 const int lpsc_size = ARRAY_SIZE(lpsc);
55
56 /*
57 * The Bluetooth address serves as the board serial number.
58 */
setup_serial_number(void)59 static void setup_serial_number(void)
60 {
61 struct udevice *idev, *ibus;
62 int ret;
63 u32 offset;
64 char serial_number[13];
65 u8 buf[6];
66 u8 eeprom_rev;
67
68 if (env_get("serial#"))
69 return;
70
71 ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &ibus);
72 if (ret)
73 return;
74
75 ret = dm_i2c_probe(ibus, EEPROM_I2C_ADDR, 0, &idev);
76 if (ret)
77 return;
78
79 if (dm_i2c_read(idev, EEPROM_REV_OFFSET, buf, 2)) {
80 printf("\nEEPROM revision read failed!\n");
81 return;
82 }
83
84 /*
85 * EEPROM rev 3 has Bluetooth address at EEPROM_REV_OFFSET.
86 * Other revisions have checksum at EEPROM_REV_OFFSET+1
87 * to detect this.
88 */
89 if ((buf[0] ^ buf[1]) == 0xFF)
90 eeprom_rev = buf[0];
91 else
92 eeprom_rev = 3;
93
94 /* EEPROM rev 3 has Bluetooth address where rev should be */
95 offset = (eeprom_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_BDADDR_OFFSET;
96
97 if (dm_i2c_read(idev, offset, buf, 6)) {
98 printf("\nEEPROM serial read failed!\n");
99 return;
100 }
101
102 sprintf(serial_number, "%02X%02X%02X%02X%02X%02X",
103 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
104
105 env_set("serial#", serial_number);
106 }
107
board_early_init_f(void)108 int board_early_init_f(void)
109 {
110 /* enable the console UART */
111 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
112 DAVINCI_UART_PWREMU_MGMT_UTRST),
113 &davinci_uart1_ctrl_regs->pwremu_mgmt);
114
115 /*
116 * Power on required peripherals
117 * ARM does not have access by default to PSC0 and PSC1
118 * assuming here that the DSP bootloader has set the IOPU
119 * such that PSC access is available to ARM
120 */
121 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
122 return 1;
123
124 return 0;
125 }
126
board_init(void)127 int board_init(void)
128 {
129 irq_init();
130
131 /* address of boot parameters */
132 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
133
134 /* setup the SUSPSRC for ARM to control emulation suspend */
135 writel(readl(&davinci_syscfg_regs->suspsrc) &
136 ~(DAVINCI_SYSCFG_SUSPSRC_I2C |
137 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
138 DAVINCI_SYSCFG_SUSPSRC_UART1),
139 &davinci_syscfg_regs->suspsrc);
140
141 /* configure pinmux settings */
142 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
143 return 1;
144
145 return 0;
146 }
147
board_late_init(void)148 int board_late_init(void)
149 {
150 setup_serial_number();
151
152 return 0;
153 }
154