2 * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
4 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 #include <asm/arch/mx31.h>
26 #include <asm/arch/mx31-regs.h>
28 DECLARE_GLOBAL_DATA_PTR;
32 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
33 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
44 * CS0L and CS0A values are from the RedBoot sources by Freescale
45 * and are also equal to those used by Sascha Hauer for the Phytec
46 * i.MX31 board. CS0U is just a slightly optimized hardware default:
47 * the only non-zero field "Wait State Control" is set to half the
50 __REG(CSCR_U(0)) = 0x00000f00;
51 __REG(CSCR_L(0)) = 0x10000D03;
52 __REG(CSCR_A(0)) = 0x00720900;
54 /* setup pins for UART1 */
55 mx31_gpio_mux(MUX_RXD1__UART1_RXD_MUX);
56 mx31_gpio_mux(MUX_TXD1__UART1_TXD_MUX);
57 mx31_gpio_mux(MUX_RTS1__UART1_RTS_B);
58 mx31_gpio_mux(MUX_CTS1__UART1_CTS_B);
61 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_SS2);
62 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_SCLK);
63 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_SPI_RDY);
64 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_MOSI);
65 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_MISO);
66 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_SS0);
67 mx31_gpio_mux((MUX_CTL_FUNC << 8) | MUX_CTL_CSPI2_SS1);
69 /* start SPI2 clock */
70 __REG(CCM_CGR2) = __REG(CCM_CGR2) | (3 << 4);
73 /* Enable UART transceivers also reset the Ethernet/external UART */
76 writew(0x8023, CS4_BASE + 4);
78 /* RedBoot also has an empty loop with 100000 iterations here -
79 * clock doesn't run yet */
80 for (i = 0; i < 100000; i++)
83 /* Clear the reset, toggle the LEDs */
84 writew(0xDF, CS4_BASE + 6);
86 /* clock still doesn't run */
87 for (i = 0; i < 100000; i++)
90 /* See 1.5.4 in IMX31ADSE_PERI_BUS_CNTRL_CPLD_RM.pdf */
96 gd->bd->bi_arch_number = MACH_TYPE_MX31ADS; /* board id for linux */
97 gd->bd->bi_boot_params = 0x80000100; /* adress of boot parameters */
102 int checkboard (void)
104 printf("Board: MX31ADS\n");