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 <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#include <dm/uclass.h>
31
32DECLARE_GLOBAL_DATA_PTR;
33
34#define EEPROM_I2C_ADDR		0x50
35#define EEPROM_REV_OFFSET	0x3F00
36#define EEPROM_BDADDR_OFFSET	0x3F06
37
38const 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
46const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
47
48const struct lpsc_resource lpsc[] = {
49	{ DAVINCI_LPSC_SPI0 },	/* Serial Flash */
50	{ DAVINCI_LPSC_UART1 },	/* console */
51	{ DAVINCI_LPSC_MMC_SD },
52};
53
54const int lpsc_size = ARRAY_SIZE(lpsc);
55
56/*
57 * The Bluetooth address serves as the board serial number.
58 */
59static 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
108int 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
127int 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
148int board_late_init(void)
149{
150	setup_serial_number();
151
152	return 0;
153}
154