arch/arm/cpu/arm720t/tegra-common/spl.c

   1 /*
   2  * (C) Copyright 2012
   3  * NVIDIA Inc, <www.nvidia.com>
   4  *
   5  * Allen Martin <amartin@nvidia.com>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25 #include <common.h>
  26 #include <asm/u-boot.h>
  27 #include <asm/utils.h>
  28 #include <asm/arch/sys_proto.h>
  29 #include <asm/arch/clock.h>
  30 #include <nand.h>
  31 #include <mmc.h>
  32 #include <fat.h>
  33 #include <version.h>
  34 #include <i2c.h>
  35 #include <image.h>
  36 #include <malloc.h>
  37 #include <linux/compiler.h>
  38 #include "board.h"
  39 #include "cpu.h"
  40
  41 #include <asm/io.h>
  42 #include <asm/arch/tegra20.h>
  43 #include <asm/arch/clk_rst.h>
  44 #include <asm/arch/clock.h>
  45 #include <asm/arch/pmc.h>
  46 #include <asm/arch/pinmux.h>
  47 #include <asm/arch/scu.h>
  48 #include <common.h>
  49
  50 DECLARE_GLOBAL_DATA_PTR;
  51
  52 /* Define global data structure pointer to it*/
  53 static gd_t gdata __attribute__ ((section(".data")));
  54 static bd_t bdata __attribute__ ((section(".data")));
  55
  56 inline void hang(void)
  57 {
  58         puts("### ERROR ### Please RESET the board ###\n");
  59         for (;;)
  60                 ;
  61 }
  62
  63 void board_init_f(ulong dummy)
  64 {
  65         board_init_uart_f();
  66
  67         /* Initialize periph GPIOs */
  68 #ifdef CONFIG_SPI_UART_SWITCH
  69         gpio_early_init_uart();
  70 #else
  71         gpio_config_uart();
  72 #endif
  73
  74         /*
  75          * We call relocate_code() with relocation target same as the
  76          * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
  77          * skipped. Instead, only .bss initialization will happen. That's
  78          * all we need
  79          */
  80         debug(">>board_init_f()\n");
  81         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
  82 }
  83
  84 /* This requires UART clocks to be enabled */
  85 static void preloader_console_init(void)
  86 {
  87         const char *u_boot_rev = U_BOOT_VERSION;
  88
  89         gd = &gdata;
  90         gd->bd = &bdata;
  91         gd->flags |= GD_FLG_RELOC;
  92         gd->baudrate = CONFIG_BAUDRATE;
  93
  94         serial_init();          /* serial communications setup */
  95
  96         gd->have_console = 1;
  97
  98         /* Avoid a second "U-Boot" coming from this string */
  99         u_boot_rev = &u_boot_rev[7];
 100
 101         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
 102                 U_BOOT_TIME);
 103 }
 104
 105 void board_init_r(gd_t *id, ulong dummy)
 106 {
 107         struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
 108
 109         /* enable JTAG */
 110         writel(0xC0, &pmt->pmt_cfg_ctl);
 111
 112         debug(">>spl:board_init_r()\n");
 113
 114         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 115                         CONFIG_SYS_SPL_MALLOC_SIZE);
 116
 117 #ifdef CONFIG_SPL_BOARD_INIT
 118         spl_board_init();
 119 #endif
 120
 121         clock_early_init();
 122         serial_init();
 123         preloader_console_init();
 124
 125         start_cpu((u32)CONFIG_SYS_TEXT_BASE);
 126         halt_avp();
 127         /* not reached */
 128 }
 129
 130 int board_usb_init(const void *blob)
 131 {
 132         return 0;
 133 }