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Diffstat (limited to 'board/friendlyarm/mini2440/mini2440.c')
| -rw-r--r-- | board/friendlyarm/mini2440/mini2440.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/board/friendlyarm/mini2440/mini2440.c b/board/friendlyarm/mini2440/mini2440.c new file mode 100644 index 0000000..e97d981 --- /dev/null +++ b/board/friendlyarm/mini2440/mini2440.c @@ -0,0 +1,134 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch> + * + * (C) Copyright 2009 + * Michel Pollet <buserror@gmail.com> + * + * (C) Copyright 2012 + * Gabriel Huau <contact@huau-gabriel.fr> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/arch/s3c2440.h> +#include <asm/arch/iomux.h> +#include <asm/arch/gpio.h> +#include <asm/io.h> +#include <asm/gpio.h> +#include <netdev.h> +#include "mini2440.h" + +DECLARE_GLOBAL_DATA_PTR; + +static inline void pll_delay(unsigned long loops) +{ + __asm__ volatile ("1:\n" + "subs %0, %1, #1\n" + "bne 1b" : "=r" (loops) : "0" (loops)); +} + +int board_early_init_f(void) +{ + struct s3c24x0_clock_power * const clk_power = + s3c24x0_get_base_clock_power(); + + /* to reduce PLL lock time, adjust the LOCKTIME register */ + clk_power->locktime = 0xFFFFFF; /* Max PLL Lock time count */ + clk_power->clkdivn = CLKDIVN_VAL; + + /* configure UPLL */ + clk_power->upllcon = ((U_M_MDIV << 12) + (U_M_PDIV << 4) + U_M_SDIV); + /* some delay between MPLL and UPLL */ + pll_delay(100); + + /* configure MPLL */ + clk_power->mpllcon = ((M_MDIV << 12) + (M_PDIV << 4) + M_SDIV); + + /* some delay between MPLL and UPLL */ + pll_delay(10000); + + return 0; +} + +/* + * Miscellaneous platform dependent initialisations + */ +int board_init(void) +{ + struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio(); + + /* IOMUX Port H : UART Configuration */ + gpio->gphcon = IOMUXH_nCTS0 | IOMUXH_nRTS0 | IOMUXH_TXD0 | IOMUXH_RXD0 | + IOMUXH_TXD1 | IOMUXH_RXD1 | IOMUXH_TXD2 | IOMUXH_RXD2; + + gpio_direction_output(GPH8, 0); + gpio_direction_output(GPH9, 0); + gpio_direction_output(GPH10, 0); + + /* adress of boot parameters */ + gd->bd->bi_boot_params = CONFIG_BOOT_PARAM_ADDR; + + return 0; +} + +int dram_init(void) +{ + struct s3c24x0_memctl *memctl = s3c24x0_get_base_memctl(); + + /* + * Configuring bus width and timing + * Initialize clocks for each bank 0..5 + * Bank 3 and 4 are used for DM9000 + */ + writel(BANK_CONF, &memctl->bwscon); + writel(B0_CONF, &memctl->bankcon[0]); + writel(B1_CONF, &memctl->bankcon[1]); + writel(B2_CONF, &memctl->bankcon[2]); + writel(B3_CONF, &memctl->bankcon[3]); + writel(B4_CONF, &memctl->bankcon[4]); + writel(B5_CONF, &memctl->bankcon[5]); + + /* Bank 6 and 7 are used for DRAM */ + writel(SDRAM_64MB, &memctl->bankcon[6]); + writel(SDRAM_64MB, &memctl->bankcon[7]); + + writel(MEM_TIMING, &memctl->refresh); + writel(BANKSIZE_CONF, &memctl->banksize); + writel(B6_MRSR, &memctl->mrsrb6); + writel(B7_MRSR, &memctl->mrsrb7); + + gd->ram_size = get_ram_size((void *) CONFIG_SYS_SDRAM_BASE, + PHYS_SDRAM_SIZE); + return 0; +} + +int board_eth_init(bd_t *bis) +{ +#ifdef CONFIG_DRIVER_DM9000 + return dm9000_initialize(bis); +#else + return 0; +#endif +} |