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 <i2c.h>
17 #include <init.h>
18 #include <spi.h>
19 #include <spi_flash.h>
20 #include <asm/arch/hardware.h>
21 #include <asm/arch/pinmux_defs.h>
22 #include <asm/io.h>
23 #include <asm/arch/davinci_misc.h>
24 #include <linux/errno.h>
25 #include <hwconfig.h>
26 #include <asm/mach-types.h>
27 #include <asm/setup.h>
28
29 DECLARE_GLOBAL_DATA_PTR;
30
31 u8 board_rev;
32
33 #define EEPROM_I2C_ADDR 0x50
34 #define EEPROM_REV_OFFSET 0x3F00
35 #define EEPROM_MAC_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
get_board_rev(void)55 u32 get_board_rev(void)
56 {
57 u8 buf[2];
58
59 if (!board_rev) {
60 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
61 printf("\nBoard revision read failed!\n");
62 } else {
63 /*
64 * Board rev 3 has MAC address at EEPROM_REV_OFFSET.
65 * Other revisions have checksum at EEPROM_REV_OFFSET+1
66 * to detect this.
67 */
68 if ((buf[0] ^ buf[1]) == 0xFF)
69 board_rev = buf[0];
70 else
71 board_rev = 3;
72 }
73 }
74
75 return board_rev;
76 }
77
78 /*
79 * The Bluetooth MAC address serves as the board serial number.
80 */
get_board_serial(struct tag_serialnr * serialnr)81 void get_board_serial(struct tag_serialnr *serialnr)
82 {
83 u32 offset;
84 u8 buf[6];
85
86 if (!board_rev)
87 board_rev = get_board_rev();
88
89 /* Board rev 3 has MAC address where rev should be */
90 offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
91
92 if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
93 printf("\nBoard serial read failed!\n");
94 } else {
95 u8 *nr;
96
97 nr = (u8 *)&serialnr->low;
98 nr[0] = buf[5];
99 nr[1] = buf[4];
100 nr[2] = buf[3];
101 nr[3] = buf[2];
102 nr = (u8 *)&serialnr->high;
103 nr[0] = buf[1];
104 nr[1] = buf[0];
105 nr[2] = 0;
106 nr[3] = 0;
107 }
108 }
109
board_early_init_f(void)110 int board_early_init_f(void)
111 {
112 /* enable the console UART */
113 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
114 DAVINCI_UART_PWREMU_MGMT_UTRST),
115 &davinci_uart1_ctrl_regs->pwremu_mgmt);
116
117 /*
118 * Power on required peripherals
119 * ARM does not have access by default to PSC0 and PSC1
120 * assuming here that the DSP bootloader has set the IOPU
121 * such that PSC access is available to ARM
122 */
123 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
124 return 1;
125
126 return 0;
127 }
128
board_init(void)129 int board_init(void)
130 {
131 irq_init();
132
133 /* arch number of the board */
134 /* LEGO didn't register for a unique number and uses da850evm */
135 gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
136
137 /* address of boot parameters */
138 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
139
140 /* setup the SUSPSRC for ARM to control emulation suspend */
141 writel(readl(&davinci_syscfg_regs->suspsrc) &
142 ~(DAVINCI_SYSCFG_SUSPSRC_I2C |
143 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
144 DAVINCI_SYSCFG_SUSPSRC_UART1),
145 &davinci_syscfg_regs->suspsrc);
146
147 /* configure pinmux settings */
148 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
149 return 1;
150
151 return 0;
152 }
153