board/lego/ev3/legoev3.c

   1 /*
   2  * Copyright (C) 2016 David Lechner <[email protected]>
   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. <[email protected]>
  11  * Copyright (C) 2007 Sergey Kubushyn <[email protected]>
  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
  29 #ifdef CONFIG_MMC_DAVINCI
  30 #include <mmc.h>
  31 #include <asm/arch/sdmmc_defs.h>
  32 #endif
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 u8 board_rev;
  37
  38 #define EEPROM_I2C_ADDR         0x50
  39 #define EEPROM_REV_OFFSET       0x3F00
  40 #define EEPROM_MAC_OFFSET       0x3F06
  41
  42 #ifdef CONFIG_MMC_DAVINCI
  43 static struct davinci_mmc mmc_sd0 = {
  44         .reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE,
  45         .host_caps = MMC_MODE_4BIT,     /* DA850 supports only 4-bit SD/MMC */
  46         .voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
  47         .version = MMC_CTLR_VERSION_2,
  48 };
  49
  50 int board_mmc_init(bd_t *bis)
  51 {
  52         mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID);
  53
  54         /* Add slot-0 to mmc subsystem */
  55         return davinci_mmc_init(bis, &mmc_sd0);
  56 }
  57 #endif
  58
  59 const struct pinmux_resource pinmuxes[] = {
  60         PINMUX_ITEM(spi0_pins_base),
  61         PINMUX_ITEM(spi0_pins_scs0),
  62         PINMUX_ITEM(uart1_pins_txrx),
  63         PINMUX_ITEM(i2c0_pins),
  64         PINMUX_ITEM(mmc0_pins),
  65 };
  66
  67 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
  68
  69 const struct lpsc_resource lpsc[] = {
  70         { DAVINCI_LPSC_SPI0 },  /* Serial Flash */
  71         { DAVINCI_LPSC_UART1 }, /* console */
  72         { DAVINCI_LPSC_MMC_SD },
  73 };
  74
  75 const int lpsc_size = ARRAY_SIZE(lpsc);
  76
  77 u32 get_board_rev(void)
  78 {
  79         u8 buf[2];
  80
  81         if (!board_rev) {
  82                 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
  83                         printf("\nBoard revision read failed!\n");
  84                 } else {
  85                         /*
  86                          * Board rev 3 has MAC address at EEPROM_REV_OFFSET.
  87                          * Other revisions have checksum at EEPROM_REV_OFFSET+1
  88                          * to detect this.
  89                          */
  90                         if ((buf[0] ^ buf[1]) == 0xFF)
  91                                 board_rev = buf[0];
  92                         else
  93                                 board_rev = 3;
  94                 }
  95         }
  96
  97         return board_rev;
  98 }
  99
 100 /*
 101  * The Bluetooth MAC address serves as the board serial number.
 102  */
 103 void get_board_serial(struct tag_serialnr *serialnr)
 104 {
 105         u32 offset;
 106         u8 buf[6];
 107
 108         if (!board_rev)
 109                 board_rev = get_board_rev();
 110
 111         /* Board rev 3 has MAC address where rev should be */
 112         offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
 113
 114         if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
 115                 printf("\nBoard serial read failed!\n");
 116         } else {
 117                 u8 *nr;
 118
 119                 nr = (u8 *)&serialnr->low;
 120                 nr[0] = buf[5];
 121                 nr[1] = buf[4];
 122                 nr[2] = buf[3];
 123                 nr[3] = buf[2];
 124                 nr = (u8 *)&serialnr->high;
 125                 nr[0] = buf[1];
 126                 nr[1] = buf[0];
 127                 nr[2] = 0;
 128                 nr[3] = 0;
 129         }
 130 }
 131
 132 int board_early_init_f(void)
 133 {
 134         /*
 135          * Power on required peripherals
 136          * ARM does not have access by default to PSC0 and PSC1
 137          * assuming here that the DSP bootloader has set the IOPU
 138          * such that PSC access is available to ARM
 139          */
 140         if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
 141                 return 1;
 142
 143         return 0;
 144 }
 145
 146 int board_init(void)
 147 {
 148 #ifndef CONFIG_USE_IRQ
 149         irq_init();
 150 #endif
 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 }