1 /* 2 * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de> 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 #include <common.h> 24 #include <netdev.h> 25 #include <asm/io.h> 26 #include <asm/arch/mx31.h> 27 #include <asm/arch/mx31-regs.h> 28 29 DECLARE_GLOBAL_DATA_PTR; 30 31 int dram_init (void) 32 { 33 gd->bd->bi_dram[0].start = PHYS_SDRAM_1; 34 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; 35 36 return 0; 37 } 38 39 int board_init (void) 40 { 41 int i; 42 43 /* CS0: Nor Flash */ 44 /* 45 * CS0L and CS0A values are from the RedBoot sources by Freescale 46 * and are also equal to those used by Sascha Hauer for the Phytec 47 * i.MX31 board. CS0U is just a slightly optimized hardware default: 48 * the only non-zero field "Wait State Control" is set to half the 49 * default value. 50 */ 51 __REG(CSCR_U(0)) = 0x00000f00; 52 __REG(CSCR_L(0)) = 0x10000D03; 53 __REG(CSCR_A(0)) = 0x00720900; 54 55 /* setup pins for UART1 */ 56 mx31_gpio_mux(MUX_RXD1__UART1_RXD_MUX); 57 mx31_gpio_mux(MUX_TXD1__UART1_TXD_MUX); 58 mx31_gpio_mux(MUX_RTS1__UART1_RTS_B); 59 mx31_gpio_mux(MUX_CTS1__UART1_CTS_B); 60 61 /* SPI2 */ 62 mx31_gpio_mux(MUX_CSPI2_SS2__CSPI2_SS2_B); 63 mx31_gpio_mux(MUX_CSPI2_SCLK__CSPI2_CLK); 64 mx31_gpio_mux(MUX_CSPI2_SPI_RDY__CSPI2_DATAREADY_B); 65 mx31_gpio_mux(MUX_CSPI2_MOSI__CSPI2_MOSI); 66 mx31_gpio_mux(MUX_CSPI2_MISO__CSPI2_MISO); 67 mx31_gpio_mux(MUX_CSPI2_SS0__CSPI2_SS0_B); 68 mx31_gpio_mux(MUX_CSPI2_SS1__CSPI2_SS1_B); 69 70 /* start SPI2 clock */ 71 __REG(CCM_CGR2) = __REG(CCM_CGR2) | (3 << 4); 72 73 /* PBC setup */ 74 /* Enable UART transceivers also reset the Ethernet/external UART */ 75 readw(CS4_BASE + 4); 76 77 writew(0x8023, CS4_BASE + 4); 78 79 /* RedBoot also has an empty loop with 100000 iterations here - 80 * clock doesn't run yet */ 81 for (i = 0; i < 100000; i++) 82 ; 83 84 /* Clear the reset, toggle the LEDs */ 85 writew(0xDF, CS4_BASE + 6); 86 87 /* clock still doesn't run */ 88 for (i = 0; i < 100000; i++) 89 ; 90 91 /* See 1.5.4 in IMX31ADSE_PERI_BUS_CNTRL_CPLD_RM.pdf */ 92 readb(CS4_BASE + 8); 93 readb(CS4_BASE + 7); 94 readb(CS4_BASE + 8); 95 readb(CS4_BASE + 7); 96 97 gd->bd->bi_arch_number = MACH_TYPE_MX31ADS; /* board id for linux */ 98 gd->bd->bi_boot_params = 0x80000100; /* adress of boot parameters */ 99 100 return 0; 101 } 102 103 int checkboard (void) 104 { 105 printf("Board: MX31ADS\n"); 106 return 0; 107 } 108 109 #ifdef CONFIG_CMD_NET 110 int board_eth_init(bd_t *bis) 111 { 112 int rc = 0; 113 #ifdef CONFIG_CS8900 114 rc = cs8900_initialize(0, CONFIG_CS8900_BASE); 115 #endif 116 return rc; 117 } 118 #endif 119