board/freescale/mx31ads/mx31ads.c

   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/clock.h>
  27 #include <asm/arch/imx-regs.h>
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 int dram_init(void)
  32 {
  33         /* dram_init must store complete ramsize in gd->ram_size */
  34         gd->ram_size = get_ram_size((volatile void *)PHYS_SDRAM_1,
  35                                 PHYS_SDRAM_1_SIZE);
  36         return 0;
  37 }
  38
  39 void dram_init_banksize(void)
  40 {
  41         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  42         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  43 }
  44
  45 int board_early_init_f(void)
  46 {
  47         int i;
  48
  49         /* CS0: Nor Flash */
  50         /*
  51          * CS0L and CS0A values are from the RedBoot sources by Freescale
  52          * and are also equal to those used by Sascha Hauer for the Phytec
  53          * i.MX31 board. CS0U is just a slightly optimized hardware default:
  54          * the only non-zero field "Wait State Control" is set to half the
  55          * default value.
  56          */
  57         __REG(CSCR_U(0)) = 0x00000f00;
  58         __REG(CSCR_L(0)) = 0x10000D03;
  59         __REG(CSCR_A(0)) = 0x00720900;
  60
  61         /* setup pins for UART1 */
  62         mx31_gpio_mux(MUX_RXD1__UART1_RXD_MUX);
  63         mx31_gpio_mux(MUX_TXD1__UART1_TXD_MUX);
  64         mx31_gpio_mux(MUX_RTS1__UART1_RTS_B);
  65         mx31_gpio_mux(MUX_CTS1__UART1_CTS_B);
  66
  67         /* SPI2 */
  68         mx31_gpio_mux(MUX_CSPI2_SS2__CSPI2_SS2_B);
  69         mx31_gpio_mux(MUX_CSPI2_SCLK__CSPI2_CLK);
  70         mx31_gpio_mux(MUX_CSPI2_SPI_RDY__CSPI2_DATAREADY_B);
  71         mx31_gpio_mux(MUX_CSPI2_MOSI__CSPI2_MOSI);
  72         mx31_gpio_mux(MUX_CSPI2_MISO__CSPI2_MISO);
  73         mx31_gpio_mux(MUX_CSPI2_SS0__CSPI2_SS0_B);
  74         mx31_gpio_mux(MUX_CSPI2_SS1__CSPI2_SS1_B);
  75
  76         /* start SPI2 clock */
  77         __REG(CCM_CGR2) = __REG(CCM_CGR2) | (3 << 4);
  78
  79         /* PBC setup */
  80         /* Enable UART transceivers also reset the Ethernet/external UART */
  81         readw(CS4_BASE + 4);
  82
  83         writew(0x8023, CS4_BASE + 4);
  84
  85         /* RedBoot also has an empty loop with 100000 iterations here -
  86          * clock doesn't run yet */
  87         for (i = 0; i < 100000; i++)
  88                 ;
  89
  90         /* Clear the reset, toggle the LEDs */
  91         writew(0xDF, CS4_BASE + 6);
  92
  93         /* clock still doesn't run */
  94         for (i = 0; i < 100000; i++)
  95                 ;
  96
  97         /* See 1.5.4 in IMX31ADSE_PERI_BUS_CNTRL_CPLD_RM.pdf */
  98         readb(CS4_BASE + 8);
  99         readb(CS4_BASE + 7);
 100         readb(CS4_BASE + 8);
 101         readb(CS4_BASE + 7);
 102
 103         return 0;
 104 }
 105
 106 int board_init(void)
 107 {
 108         gd->bd->bi_arch_number = MACH_TYPE_MX31ADS;     /* board id for linux */
 109         gd->bd->bi_boot_params = 0x80000100;    /* adress of boot parameters */
 110
 111         return 0;
 112 }
 113
 114 int checkboard (void)
 115 {
 116         printf("Board: MX31ADS\n");
 117         return 0;
 118 }
 119
 120 #ifdef CONFIG_CMD_NET
 121 int board_eth_init(bd_t *bis)
 122 {
 123         int rc = 0;
 124 #ifdef CONFIG_CS8900
 125         rc = cs8900_initialize(0, CONFIG_CS8900_BASE);
 126 #endif
 127         return rc;
 128 }
 129 #endif