board/lego/ev3/legoev3.c

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