board/davinci/da830evm/da830evm.c

   1 /*
   2  * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
   3  *
   4  * Base on code from TI. Original Notices follow:
   5  *
   6  * (C) Copyright 2008, Texas Instruments, Inc. http://www.ti.com/
   7  *
   8  * Modified for DA8xx EVM.
   9  *
  10  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
  11  *
  12  * Parts are shamelessly stolen from various TI sources, original copyright
  13  * follows:
  14  * -----------------------------------------------------------------
  15  *
  16  * Copyright (C) 2004 Texas Instruments.
  17  *
  18  * ----------------------------------------------------------------------------
  19  * This program is free software; you can redistribute it and/or modify
  20  * it under the terms of the GNU General Public License as published by
  21  * the Free Software Foundation; either version 2 of the License, or
  22  * (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32  * ----------------------------------------------------------------------------
  33  */
  34
  35 #include <common.h>
  36 #include <i2c.h>
  37 #include <asm/arch/hardware.h>
  38 #include <asm/io.h>
  39 #include "../common/misc.h"
  40
  41 DECLARE_GLOBAL_DATA_PTR;
  42
  43 #define pinmux  &davinci_syscfg_regs->pinmux
  44
  45 #ifdef CONFIG_SPI_FLASH
  46 /* SPI0 pin muxer settings */
  47 const struct pinmux_config spi0_pins[] = {
  48         { pinmux[7], 1, 3 },
  49         { pinmux[7], 1, 4 },
  50         { pinmux[7], 1, 5 },
  51         { pinmux[7], 1, 6 },
  52         { pinmux[7], 1, 7 }
  53 };
  54 #endif
  55
  56 /* UART pin muxer settings */
  57 const struct pinmux_config uart_pins[] = {
  58         { pinmux[8], 2, 7 },
  59         { pinmux[9], 2, 0 }
  60 };
  61
  62 /* I2C pin muxer settings */
  63 const struct pinmux_config i2c_pins[] = {
  64         { pinmux[9], 2, 3 },
  65         { pinmux[9], 2, 4 }
  66 };
  67
  68 int board_init(void)
  69 {
  70 #ifndef CONFIG_USE_IRQ
  71         /*
  72          * Mask all IRQs by clearing the global enable and setting
  73          * the enable clear for all the 90 interrupts.
  74          */
  75
  76         writel(0, &davinci_aintc_regs->ger);
  77
  78         writel(0, &davinci_aintc_regs->hier);
  79
  80         writel(0xffffffff, &davinci_aintc_regs->ecr1);
  81         writel(0xffffffff, &davinci_aintc_regs->ecr2);
  82         writel(0xffffffff, &davinci_aintc_regs->ecr3);
  83 #endif
  84
  85         /* arch number of the board */
  86         gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA830_EVM;
  87
  88         /* address of boot parameters */
  89         gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
  90
  91         /*
  92          * Power on required peripherals
  93          * ARM does not have access by default to PSC0 and PSC1
  94          * assuming here that the DSP bootloader has set the IOPU
  95          * such that PSC access is available to ARM
  96          */
  97         lpsc_on(DAVINCI_LPSC_AEMIF);    /* NAND, NOR */
  98         lpsc_on(DAVINCI_LPSC_SPI0);     /* Serial Flash */
  99         lpsc_on(DAVINCI_LPSC_EMAC);     /* image download */
 100         lpsc_on(DAVINCI_LPSC_UART2);    /* console */
 101         lpsc_on(DAVINCI_LPSC_GPIO);
 102
 103         /* setup the SUSPSRC for ARM to control emulation suspend */
 104         writel(readl(&davinci_syscfg_regs->suspsrc) &
 105                ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
 106                  DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
 107                  DAVINCI_SYSCFG_SUSPSRC_UART2),
 108                &davinci_syscfg_regs->suspsrc);
 109
 110 #ifdef CONFIG_SPI_FLASH
 111         if (davinci_configure_pin_mux(spi0_pins, ARRAY_SIZE(spi0_pins)) != 0)
 112                 return 1;
 113 #endif
 114
 115         if (davinci_configure_pin_mux(uart_pins, ARRAY_SIZE(uart_pins)) != 0)
 116                 return 1;
 117
 118         if (davinci_configure_pin_mux(i2c_pins, ARRAY_SIZE(i2c_pins)) != 0)
 119                 return 1;
 120
 121         /* enable the console UART */
 122         writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
 123                 DAVINCI_UART_PWREMU_MGMT_UTRST),
 124                &davinci_uart2_ctrl_regs->pwremu_mgmt);
 125
 126         return(0);
 127 }