diff options
Diffstat (limited to 'board/freescale/p1_p2_rdb_pc/spl_minimal.c')
-rw-r--r-- | board/freescale/p1_p2_rdb_pc/spl_minimal.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/board/freescale/p1_p2_rdb_pc/spl_minimal.c b/board/freescale/p1_p2_rdb_pc/spl_minimal.c new file mode 100644 index 0000000..5c893ee --- /dev/null +++ b/board/freescale/p1_p2_rdb_pc/spl_minimal.c @@ -0,0 +1,131 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * + * 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 <ns16550.h> +#include <asm/io.h> +#include <nand.h> +#include <asm/fsl_law.h> +#include <asm/fsl_ddr_sdram.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * Fixed sdram init -- doesn't use serial presence detect. + */ +void sdram_init(void) +{ + ccsr_ddr_t *ddr = (ccsr_ddr_t *)CONFIG_SYS_MPC85xx_DDR_ADDR; + + __raw_writel(CONFIG_SYS_DDR_CS0_BNDS, &ddr->cs0_bnds); + __raw_writel(CONFIG_SYS_DDR_CS0_CONFIG, &ddr->cs0_config); +#if CONFIG_CHIP_SELECTS_PER_CTRL > 1 + __raw_writel(CONFIG_SYS_DDR_CS1_BNDS, &ddr->cs1_bnds); + __raw_writel(CONFIG_SYS_DDR_CS1_CONFIG, &ddr->cs1_config); +#endif + __raw_writel(CONFIG_SYS_DDR_TIMING_3, &ddr->timing_cfg_3); + __raw_writel(CONFIG_SYS_DDR_TIMING_0, &ddr->timing_cfg_0); + __raw_writel(CONFIG_SYS_DDR_TIMING_1, &ddr->timing_cfg_1); + __raw_writel(CONFIG_SYS_DDR_TIMING_2, &ddr->timing_cfg_2); + + __raw_writel(CONFIG_SYS_DDR_CONTROL_2, &ddr->sdram_cfg_2); + __raw_writel(CONFIG_SYS_DDR_MODE_1, &ddr->sdram_mode); + __raw_writel(CONFIG_SYS_DDR_MODE_2, &ddr->sdram_mode_2); + + __raw_writel(CONFIG_SYS_DDR_INTERVAL, &ddr->sdram_interval); + __raw_writel(CONFIG_SYS_DDR_DATA_INIT, &ddr->sdram_data_init); + __raw_writel(CONFIG_SYS_DDR_CLK_CTRL, &ddr->sdram_clk_cntl); + + __raw_writel(CONFIG_SYS_DDR_TIMING_4, &ddr->timing_cfg_4); + __raw_writel(CONFIG_SYS_DDR_TIMING_5, &ddr->timing_cfg_5); + __raw_writel(CONFIG_SYS_DDR_ZQ_CONTROL, &ddr->ddr_zq_cntl); + __raw_writel(CONFIG_SYS_DDR_WRLVL_CONTROL, &ddr->ddr_wrlvl_cntl); + + /* Set, but do not enable the memory */ + __raw_writel(CONFIG_SYS_DDR_CONTROL & ~SDRAM_CFG_MEM_EN, &ddr->sdram_cfg); + + asm volatile("sync;isync"); + udelay(500); + + /* Let the controller go */ + out_be32(&ddr->sdram_cfg, in_be32(&ddr->sdram_cfg) | SDRAM_CFG_MEM_EN); + + set_next_law(0, CONFIG_SYS_SDRAM_SIZE_LAW, LAW_TRGT_IF_DDR_1); +} + +void board_init_f(ulong bootflag) +{ + u32 plat_ratio; + ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; +#ifndef CONFIG_QE + ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR); +#endif + + /* initialize selected port with appropriate baud rate */ + plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO; + plat_ratio >>= 1; + gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio; + + NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1, + gd->bus_clk / 16 / CONFIG_BAUDRATE); + + puts("\nNAND boot... "); + +#ifndef CONFIG_QE + /* init DDR3 reset signal */ + __raw_writel(0x02000000, &pgpio->gpdir); + __raw_writel(0x00200000, &pgpio->gpodr); + __raw_writel(0x00000000, &pgpio->gpdat); + udelay(1000); + __raw_writel(0x00200000, &pgpio->gpdat); + udelay(1000); + __raw_writel(0x00000000, &pgpio->gpdir); +#endif + + /* Initialize the DDR3 */ + sdram_init(); + + /* copy code to RAM and jump to it - this should not return */ + /* NOTE - code has to be copied out of NAND buffer before + * other blocks can be read. + */ + relocate_code(CONFIG_SPL_RELOC_STACK, 0, CONFIG_SPL_RELOC_TEXT_BASE); +} + +void board_init_r(gd_t *gd, ulong dest_addr) +{ + nand_boot(); +} + +void putc(char c) +{ + if (c == '\n') + NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r'); + + NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c); +} + +void puts(const char *str) +{ + while (*str) + putc(*str++); +} |