mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
545c12cf9a
When P1021RDB-PC reboot system, the board will hung at uboot DDR configuration. For P1021RDB-PC DDR reset pin is multiplex with QE, so uboot will reserve this pin for QE and skip DDR reset. Other platforms without QE will do this reset. This patch adds a slight code to reset DDR chip by QE CE_PB8 pin for NAND and NOR FLASH boot. For booting from SPI FALSH and SD card, it seems possible to use the rom on chip to write to the GPIO pins before configuring the DDR. Signed-off-by: Xu Jiucheng <B37781@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
152 lines
4.5 KiB
C
152 lines
4.5 KiB
C
/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <ns16550.h>
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#include <asm/io.h>
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#include <nand.h>
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#include <linux/compiler.h>
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#include <asm/fsl_law.h>
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#include <asm/fsl_ddr_sdram.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_SYS_INIT_L2_ADDR
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/*
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* Fixed sdram init -- doesn't use serial presence detect.
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*/
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static void sdram_init(void)
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{
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ccsr_ddr_t *ddr = (ccsr_ddr_t *)CONFIG_SYS_MPC8xxx_DDR_ADDR;
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__raw_writel(CONFIG_SYS_DDR_CS0_BNDS, &ddr->cs0_bnds);
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__raw_writel(CONFIG_SYS_DDR_CS0_CONFIG, &ddr->cs0_config);
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#if CONFIG_CHIP_SELECTS_PER_CTRL > 1
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__raw_writel(CONFIG_SYS_DDR_CS1_BNDS, &ddr->cs1_bnds);
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__raw_writel(CONFIG_SYS_DDR_CS1_CONFIG, &ddr->cs1_config);
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#endif
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__raw_writel(CONFIG_SYS_DDR_TIMING_3, &ddr->timing_cfg_3);
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__raw_writel(CONFIG_SYS_DDR_TIMING_0, &ddr->timing_cfg_0);
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__raw_writel(CONFIG_SYS_DDR_TIMING_1, &ddr->timing_cfg_1);
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__raw_writel(CONFIG_SYS_DDR_TIMING_2, &ddr->timing_cfg_2);
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__raw_writel(CONFIG_SYS_DDR_CONTROL_2, &ddr->sdram_cfg_2);
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__raw_writel(CONFIG_SYS_DDR_MODE_1, &ddr->sdram_mode);
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__raw_writel(CONFIG_SYS_DDR_MODE_2, &ddr->sdram_mode_2);
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__raw_writel(CONFIG_SYS_DDR_INTERVAL, &ddr->sdram_interval);
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__raw_writel(CONFIG_SYS_DDR_DATA_INIT, &ddr->sdram_data_init);
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__raw_writel(CONFIG_SYS_DDR_CLK_CTRL, &ddr->sdram_clk_cntl);
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__raw_writel(CONFIG_SYS_DDR_TIMING_4, &ddr->timing_cfg_4);
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__raw_writel(CONFIG_SYS_DDR_TIMING_5, &ddr->timing_cfg_5);
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__raw_writel(CONFIG_SYS_DDR_ZQ_CONTROL, &ddr->ddr_zq_cntl);
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__raw_writel(CONFIG_SYS_DDR_WRLVL_CONTROL, &ddr->ddr_wrlvl_cntl);
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/* Set, but do not enable the memory */
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__raw_writel(CONFIG_SYS_DDR_CONTROL & ~SDRAM_CFG_MEM_EN, &ddr->sdram_cfg);
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asm volatile("sync;isync");
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udelay(500);
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/* Let the controller go */
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out_be32(&ddr->sdram_cfg, in_be32(&ddr->sdram_cfg) | SDRAM_CFG_MEM_EN);
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set_next_law(0, CONFIG_SYS_SDRAM_SIZE_LAW, LAW_TRGT_IF_DDR_1);
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}
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#endif
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void board_init_f(ulong bootflag)
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{
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u32 plat_ratio;
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ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
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#ifndef CONFIG_QE
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ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
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#elif defined(CONFIG_P1021RDB)
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par_io_t *par_io = (par_io_t *)&(gur->qe_par_io);
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#endif
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/* initialize selected port with appropriate baud rate */
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plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
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plat_ratio >>= 1;
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gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
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NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
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gd->bus_clk / 16 / CONFIG_BAUDRATE);
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puts("\nNAND boot... ");
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#ifndef CONFIG_QE
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/* init DDR3 reset signal */
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__raw_writel(0x02000000, &pgpio->gpdir);
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__raw_writel(0x00200000, &pgpio->gpodr);
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__raw_writel(0x00000000, &pgpio->gpdat);
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udelay(1000);
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__raw_writel(0x00200000, &pgpio->gpdat);
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udelay(1000);
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__raw_writel(0x00000000, &pgpio->gpdir);
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#elif defined(CONFIG_P1021RDB)
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/* init DDR3 reset signal CE_PB8 */
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out_be32(&par_io[1].cpdir1, 0x00004000);
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out_be32(&par_io[1].cpodr, 0x00800000);
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out_be32(&par_io[1].cppar1, 0x00000000);
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/* reset DDR3 */
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out_be32(&par_io[1].cpdat, 0x00800000);
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udelay(1000);
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out_be32(&par_io[1].cpdat, 0x00000000);
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udelay(1000);
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out_be32(&par_io[1].cpdat, 0x00800000);
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/* disable the CE_PB8 */
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out_be32(&par_io[1].cpdir1, 0x00000000);
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#endif
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#ifndef CONFIG_SYS_INIT_L2_ADDR
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/* Initialize the DDR3 */
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sdram_init();
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#endif
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/* copy code to RAM and jump to it - this should not return */
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/* NOTE - code has to be copied out of NAND buffer before
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* other blocks can be read.
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*/
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relocate_code(CONFIG_SPL_RELOC_STACK, 0, CONFIG_SPL_RELOC_TEXT_BASE);
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}
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void board_init_r(gd_t *gd, ulong dest_addr)
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{
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nand_boot();
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}
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void putc(char c)
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{
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if (c == '\n')
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NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
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NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
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}
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void puts(const char *str)
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{
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while (*str)
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putc(*str++);
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}
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