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 #include <asm/setup.h> 30 31 #ifdef CONFIG_MMC_DAVINCI 32 #include <mmc.h> 33 #include <asm/arch/sdmmc_defs.h> 34 #endif 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 u8 board_rev; 39 40 #define EEPROM_I2C_ADDR 0x50 41 #define EEPROM_REV_OFFSET 0x3F00 42 #define EEPROM_MAC_OFFSET 0x3F06 43 44 #ifdef CONFIG_MMC_DAVINCI 45 static struct davinci_mmc mmc_sd0 = { 46 .reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE, 47 .host_caps = MMC_MODE_4BIT, /* DA850 supports only 4-bit SD/MMC */ 48 .voltages = MMC_VDD_32_33 | MMC_VDD_33_34, 49 .version = MMC_CTLR_VERSION_2, 50 }; 51 52 int board_mmc_init(bd_t *bis) 53 { 54 mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID); 55 56 /* Add slot-0 to mmc subsystem */ 57 return davinci_mmc_init(bis, &mmc_sd0); 58 } 59 #endif 60 61 const struct pinmux_resource pinmuxes[] = { 62 PINMUX_ITEM(spi0_pins_base), 63 PINMUX_ITEM(spi0_pins_scs0), 64 PINMUX_ITEM(uart1_pins_txrx), 65 PINMUX_ITEM(i2c0_pins), 66 PINMUX_ITEM(mmc0_pins), 67 }; 68 69 const int pinmuxes_size = ARRAY_SIZE(pinmuxes); 70 71 const struct lpsc_resource lpsc[] = { 72 { DAVINCI_LPSC_SPI0 }, /* Serial Flash */ 73 { DAVINCI_LPSC_UART1 }, /* console */ 74 { DAVINCI_LPSC_MMC_SD }, 75 }; 76 77 const int lpsc_size = ARRAY_SIZE(lpsc); 78 79 u32 get_board_rev(void) 80 { 81 u8 buf[2]; 82 83 if (!board_rev) { 84 if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) { 85 printf("\nBoard revision read failed!\n"); 86 } else { 87 /* 88 * Board rev 3 has MAC address at EEPROM_REV_OFFSET. 89 * Other revisions have checksum at EEPROM_REV_OFFSET+1 90 * to detect this. 91 */ 92 if ((buf[0] ^ buf[1]) == 0xFF) 93 board_rev = buf[0]; 94 else 95 board_rev = 3; 96 } 97 } 98 99 return board_rev; 100 } 101 102 /* 103 * The Bluetooth MAC address serves as the board serial number. 104 */ 105 void get_board_serial(struct tag_serialnr *serialnr) 106 { 107 u32 offset; 108 u8 buf[6]; 109 110 if (!board_rev) 111 board_rev = get_board_rev(); 112 113 /* Board rev 3 has MAC address where rev should be */ 114 offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET; 115 116 if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) { 117 printf("\nBoard serial read failed!\n"); 118 } else { 119 u8 *nr; 120 121 nr = (u8 *)&serialnr->low; 122 nr[0] = buf[5]; 123 nr[1] = buf[4]; 124 nr[2] = buf[3]; 125 nr[3] = buf[2]; 126 nr = (u8 *)&serialnr->high; 127 nr[0] = buf[1]; 128 nr[1] = buf[0]; 129 nr[2] = 0; 130 nr[3] = 0; 131 } 132 } 133 134 int board_early_init_f(void) 135 { 136 /* 137 * Power on required peripherals 138 * ARM does not have access by default to PSC0 and PSC1 139 * assuming here that the DSP bootloader has set the IOPU 140 * such that PSC access is available to ARM 141 */ 142 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc))) 143 return 1; 144 145 return 0; 146 } 147 148 int board_init(void) 149 { 150 irq_init(); 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 } 177