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 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 irq_init(); 149 150 /* arch number of the board */ 151 /* LEGO didn't register for a unique number and uses da850evm */ 152 gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM; 153 154 /* address of boot parameters */ 155 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR; 156 157 /* setup the SUSPSRC for ARM to control emulation suspend */ 158 writel(readl(&davinci_syscfg_regs->suspsrc) & 159 ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C | 160 DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 | 161 DAVINCI_SYSCFG_SUSPSRC_UART1), 162 &davinci_syscfg_regs->suspsrc); 163 164 /* configure pinmux settings */ 165 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes))) 166 return 1; 167 168 /* enable the console UART */ 169 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST | 170 DAVINCI_UART_PWREMU_MGMT_UTRST), 171 &davinci_uart1_ctrl_regs->pwremu_mgmt); 172 173 return 0; 174 } 175