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