LXR uboot/board/lego/ev3/legoev3.c

   1/*
   2 * Copyright (C) 2016 David Lechner <david@lechnology.com>
   3 *
   4 * Based on da850evm.c
   5 *
   6 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   7 *
   8 * Based on da830evm.c. Original Copyrights follow:
   9 *
  10 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
  11 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
  12 *
  13 * SPDX-License-Identifier:     GPL-2.0+
  14 */
  15
  16#include <common.h>
  17#include <i2c.h>
  18#include <net.h>
  19#include <netdev.h>
  20#include <spi.h>
  21#include <spi_flash.h>
  22#include <asm/arch/hardware.h>
  23#include <asm/arch/pinmux_defs.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#ifdef CONFIG_MMC_DAVINCI
  32#include <mmc.h>
  33#include <asm/arch/sdmmc_defs.h>
  34#endif
  35
  36DECLARE_GLOBAL_DATA_PTR;
  37
  38u8 board_rev;
  39
  40#define EEPROM_I2C_ADDR         0x50
  41#define EEPROM_REV_OFFSET       0x3F00
  42#define EEPROM_MAC_OFFSET       0x3F06
  43
  44#ifdef CONFIG_MMC_DAVINCI
  45static struct davinci_mmc mmc_sd0 = {
  46        .reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE,
  47        .host_caps = MMC_MODE_4BIT,     /* DA850 supports only 4-bit SD/MMC */
  48        .voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
  49        .version = MMC_CTLR_VERSION_2,
  50};
  51
  52int board_mmc_init(bd_t *bis)
  53{
  54        mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID);
  55
  56        /* Add slot-0 to mmc subsystem */
  57        return davinci_mmc_init(bis, &mmc_sd0);
  58}
  59#endif
  60
  61const struct pinmux_resource pinmuxes[] = {
  62        PINMUX_ITEM(spi0_pins_base),
  63        PINMUX_ITEM(spi0_pins_scs0),
  64        PINMUX_ITEM(uart1_pins_txrx),
  65        PINMUX_ITEM(i2c0_pins),
  66        PINMUX_ITEM(mmc0_pins),
  67};
  68
  69const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
  70
  71const struct lpsc_resource lpsc[] = {
  72        { DAVINCI_LPSC_SPI0 },  /* Serial Flash */
  73        { DAVINCI_LPSC_UART1 }, /* console */
  74        { DAVINCI_LPSC_MMC_SD },
  75};
  76
  77const int lpsc_size = ARRAY_SIZE(lpsc);
  78
  79u32 get_board_rev(void)
  80{
  81        u8 buf[2];
  82
  83        if (!board_rev) {
  84                if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
  85                        printf("\nBoard revision read failed!\n");
  86                } else {
  87                        /*
  88                         * Board rev 3 has MAC address at EEPROM_REV_OFFSET.
  89                         * Other revisions have checksum at EEPROM_REV_OFFSET+1
  90                         * to detect this.
  91                         */
  92                        if ((buf[0] ^ buf[1]) == 0xFF)
  93                                board_rev = buf[0];
  94                        else
  95                                board_rev = 3;
  96                }
  97        }
  98
  99        return board_rev;
 100}
 101
 102/*
 103 * The Bluetooth MAC address serves as the board serial number.
 104 */
 105void get_board_serial(struct tag_serialnr *serialnr)
 106{
 107        u32 offset;
 108        u8 buf[6];
 109
 110        if (!board_rev)
 111                board_rev = get_board_rev();
 112
 113        /* Board rev 3 has MAC address where rev should be */
 114        offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
 115
 116        if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
 117                printf("\nBoard serial read failed!\n");
 118        } else {
 119                u8 *nr;
 120
 121                nr = (u8 *)&serialnr->low;
 122                nr[0] = buf[5];
 123                nr[1] = buf[4];
 124                nr[2] = buf[3];
 125                nr[3] = buf[2];
 126                nr = (u8 *)&serialnr->high;
 127                nr[0] = buf[1];
 128                nr[1] = buf[0];
 129                nr[2] = 0;
 130                nr[3] = 0;
 131        }
 132}
 133
 134int board_early_init_f(void)
 135{
 136        /*
 137         * Power on required peripherals
 138         * ARM does not have access by default to PSC0 and PSC1
 139         * assuming here that the DSP bootloader has set the IOPU
 140         * such that PSC access is available to ARM
 141         */
 142        if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
 143                return 1;
 144
 145        return 0;
 146}
 147
 148int board_init(void)
 149{
 150        irq_init();
 151
 152        /* arch number of the board */
 153        /* LEGO didn't register for a unique number and uses da850evm */
 154        gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
 155
 156        /* address of boot parameters */
 157        gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 158
 159        /* setup the SUSPSRC for ARM to control emulation suspend */
 160        writel(readl(&davinci_syscfg_regs->suspsrc) &
 161               ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
 162                 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
 163                 DAVINCI_SYSCFG_SUSPSRC_UART1),
 164               &davinci_syscfg_regs->suspsrc);
 165
 166        /* configure pinmux settings */
 167        if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
 168                return 1;
 169
 170        /* enable the console UART */
 171        writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
 172                DAVINCI_UART_PWREMU_MGMT_UTRST),
 173               &davinci_uart1_ctrl_regs->pwremu_mgmt);
 174
 175        return 0;
 176}
 177