board/lego/ev3/legoev3.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2016 David Lechner <[email protected]>
   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. <[email protected]>
  12  * Copyright (C) 2007 Sergey Kubushyn <[email protected]>
  13  */
  14
  15 #include <common.h>
  16 #include <i2c.h>
  17 #include <spi.h>
  18 #include <spi_flash.h>
  19 #include <asm/arch/hardware.h>
  20 #include <asm/arch/pinmux_defs.h>
  21 #include <asm/io.h>
  22 #include <asm/arch/davinci_misc.h>
  23 #include <linux/errno.h>
  24 #include <hwconfig.h>
  25 #include <asm/mach-types.h>
  26 #include <asm/setup.h>
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 u8 board_rev;
  31
  32 #define EEPROM_I2C_ADDR         0x50
  33 #define EEPROM_REV_OFFSET       0x3F00
  34 #define EEPROM_MAC_OFFSET       0x3F06
  35
  36 const struct pinmux_resource pinmuxes[] = {
  37         PINMUX_ITEM(spi0_pins_base),
  38         PINMUX_ITEM(spi0_pins_scs0),
  39         PINMUX_ITEM(uart1_pins_txrx),
  40         PINMUX_ITEM(i2c0_pins),
  41         PINMUX_ITEM(mmc0_pins),
  42 };
  43
  44 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
  45
  46 const struct lpsc_resource lpsc[] = {
  47         { DAVINCI_LPSC_SPI0 },  /* Serial Flash */
  48         { DAVINCI_LPSC_UART1 }, /* console */
  49         { DAVINCI_LPSC_MMC_SD },
  50 };
  51
  52 const int lpsc_size = ARRAY_SIZE(lpsc);
  53
  54 u32 get_board_rev(void)
  55 {
  56         u8 buf[2];
  57
  58         if (!board_rev) {
  59                 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
  60                         printf("\nBoard revision read failed!\n");
  61                 } else {
  62                         /*
  63                          * Board rev 3 has MAC address at EEPROM_REV_OFFSET.
  64                          * Other revisions have checksum at EEPROM_REV_OFFSET+1
  65                          * to detect this.
  66                          */
  67                         if ((buf[0] ^ buf[1]) == 0xFF)
  68                                 board_rev = buf[0];
  69                         else
  70                                 board_rev = 3;
  71                 }
  72         }
  73
  74         return board_rev;
  75 }
  76
  77 /*
  78  * The Bluetooth MAC address serves as the board serial number.
  79  */
  80 void get_board_serial(struct tag_serialnr *serialnr)
  81 {
  82         u32 offset;
  83         u8 buf[6];
  84
  85         if (!board_rev)
  86                 board_rev = get_board_rev();
  87
  88         /* Board rev 3 has MAC address where rev should be */
  89         offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
  90
  91         if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
  92                 printf("\nBoard serial read failed!\n");
  93         } else {
  94                 u8 *nr;
  95
  96                 nr = (u8 *)&serialnr->low;
  97                 nr[0] = buf[5];
  98                 nr[1] = buf[4];
  99                 nr[2] = buf[3];
 100                 nr[3] = buf[2];
 101                 nr = (u8 *)&serialnr->high;
 102                 nr[0] = buf[1];
 103                 nr[1] = buf[0];
 104                 nr[2] = 0;
 105                 nr[3] = 0;
 106         }
 107 }
 108
 109 int board_early_init_f(void)
 110 {
 111         /* enable the console UART */
 112         writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
 113                 DAVINCI_UART_PWREMU_MGMT_UTRST),
 114                &davinci_uart1_ctrl_regs->pwremu_mgmt);
 115
 116         /*
 117          * Power on required peripherals
 118          * ARM does not have access by default to PSC0 and PSC1
 119          * assuming here that the DSP bootloader has set the IOPU
 120          * such that PSC access is available to ARM
 121          */
 122         if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
 123                 return 1;
 124
 125         return 0;
 126 }
 127
 128 int board_init(void)
 129 {
 130         irq_init();
 131
 132         /* arch number of the board */
 133         /* LEGO didn't register for a unique number and uses da850evm */
 134         gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
 135
 136         /* address of boot parameters */
 137         gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 138
 139         /* setup the SUSPSRC for ARM to control emulation suspend */
 140         writel(readl(&davinci_syscfg_regs->suspsrc) &
 141                ~(DAVINCI_SYSCFG_SUSPSRC_I2C |
 142                  DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
 143                  DAVINCI_SYSCFG_SUSPSRC_UART1),
 144                &davinci_syscfg_regs->suspsrc);
 145
 146         /* configure pinmux settings */
 147         if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
 148                 return 1;
 149
 150         return 0;
 151 }