board/davinci/da8xxevm/hawkboard_nand_spl.c

   1 /*
   2  * Modified for Hawkboard - Syed Mohammed Khasim <khasim@beagleboard.org>
   3  *
   4  * Copyright (C) 2008 Sekhar Nori, Texas Instruments, Inc.  <nsekhar@ti.com>
   5  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   6  * Copyright (C) 2004 Texas Instruments.
   7  *
   8  * ----------------------------------------------------------------------------
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  * ----------------------------------------------------------------------------
  23  */
  24
  25 #include <common.h>
  26 #include <asm/errno.h>
  27 #include <asm/arch/hardware.h>
  28 #include <asm/io.h>
  29 #include <asm/arch/davinci_misc.h>
  30 #include <asm/arch/pinmux_defs.h>
  31 #include <ns16550.h>
  32 #include <nand.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 static const struct pinmux_resource pinmuxes[] = {
  37         PINMUX_ITEM(emac_pins_mii),
  38         PINMUX_ITEM(emac_pins_mdio),
  39         PINMUX_ITEM(emifa_pins_cs3),
  40         PINMUX_ITEM(emifa_pins_cs4),
  41         PINMUX_ITEM(emifa_pins_nand),
  42         PINMUX_ITEM(uart2_pins_txrx),
  43         PINMUX_ITEM(uart2_pins_rtscts),
  44 };
  45
  46 static const struct lpsc_resource lpsc[] = {
  47         { DAVINCI_LPSC_AEMIF }, /* NAND, NOR */
  48         { DAVINCI_LPSC_SPI1 },  /* Serial Flash */
  49         { DAVINCI_LPSC_EMAC },  /* image download */
  50         { DAVINCI_LPSC_UART2 }, /* console */
  51         { DAVINCI_LPSC_GPIO },
  52 };
  53
  54 void board_init_f(ulong bootflag)
  55 {
  56         /*
  57          * Kick Registers need to be set to allow access to Pin Mux registers
  58          */
  59         writel(DV_SYSCFG_KICK0_UNLOCK, &davinci_syscfg_regs->kick0);
  60         writel(DV_SYSCFG_KICK1_UNLOCK, &davinci_syscfg_regs->kick1);
  61
  62         /* setup the SUSPSRC for ARM to control emulation suspend */
  63         writel(readl(&davinci_syscfg_regs->suspsrc) &
  64                ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
  65                  DAVINCI_SYSCFG_SUSPSRC_SPI1 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
  66                  DAVINCI_SYSCFG_SUSPSRC_UART2), &davinci_syscfg_regs->suspsrc);
  67
  68         /* Power on required peripherals
  69          * ARM does not have acess by default to PSC0 and PSC1
  70          * assuming here that the DSP bootloader has set the IOPU
  71          * such that PSC access is available to ARM
  72          */
  73         da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc));
  74
  75         /* configure pinmux settings */
  76         davinci_configure_pin_mux_items(pinmuxes,
  77                                         ARRAY_SIZE(pinmuxes));
  78
  79         writel(readl(&davinci_uart2_ctrl_regs->pwremu_mgmt) |
  80                (DAVINCI_UART_PWREMU_MGMT_FREE) |
  81                (DAVINCI_UART_PWREMU_MGMT_URRST) |
  82                (DAVINCI_UART_PWREMU_MGMT_UTRST),
  83                &davinci_uart2_ctrl_regs->pwremu_mgmt);
  84
  85         NS16550_init((NS16550_t)(DAVINCI_UART2_BASE),
  86                         CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
  87
  88         puts("Nand boot...\n");
  89
  90         nand_boot();
  91 }
  92
  93 void puts(const char *str)
  94 {
  95         while (*str)
  96                 putc(*str++);
  97 }
  98
  99 void putc(char c)
 100 {
 101         if (gd->flags & GD_FLG_SILENT)
 102                 return;
 103
 104         if (c == '\n')
 105                 NS16550_putc((NS16550_t)(DAVINCI_UART2_BASE), '\r');
 106
 107         NS16550_putc((NS16550_t)(DAVINCI_UART2_BASE), c);
 108 }
 109
 110 void hang(void)
 111 {
 112         puts("### ERROR ### Please RESET the board ###\n");
 113         for (;;)
 114                 ;
 115 }