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 } 176