mirror of
https://github.com/AsahiLinux/u-boot
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1e463866f5
Identify SDRAM devices connected to EMIF automatically: LPDDR2 devices have some Mode Registers that provide details about the device such as the type, density, bus width etc. EMIF has the capability to read these registers. If there are no devices connected to a given chip-select reading mode registers will return junk values. After reading as many such registers as possible and matching with expected ranges of values the driver can identify if there is a device connected to the respective CS. If we identify that a device is connected the values read give us complete details about the device. This along with the base AC timings specified by JESD209-2 allows us to do a complete automatic initialization of SDRAM that works on all boards. Please note that the default AC timings specified by JESD209-2 will be safe for all devices but not necessarily optimal. However, for the Elpida devices used on Panda and SDP the default timings are both safe and optimal. Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
246 lines
6.5 KiB
C
246 lines
6.5 KiB
C
/*
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* (C) Copyright 2010
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* Texas Instruments Incorporated.
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* Steve Sakoman <steve@sakoman.com>
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*
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* Configuration settings for the TI OMAP4 Panda board.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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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* 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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#ifndef __CONFIG_H
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#define __CONFIG_H
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/*
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* High Level Configuration Options
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*/
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#define CONFIG_ARMV7 1 /* This is an ARM V7 CPU core */
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#define CONFIG_OMAP 1 /* in a TI OMAP core */
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#define CONFIG_OMAP44XX 1 /* which is a 44XX */
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#define CONFIG_OMAP4430 1 /* which is in a 4430 */
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#define CONFIG_PANDA 1 /* working with Panda */
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#define CONFIG_ARCH_CPU_INIT
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/* Get CPU defs */
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#include <asm/arch/cpu.h>
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#include <asm/arch/omap4.h>
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/* Display CPU and Board Info */
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#define CONFIG_DISPLAY_CPUINFO 1
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#define CONFIG_DISPLAY_BOARDINFO 1
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/* Clock Defines */
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#define V_OSCK 38400000 /* Clock output from T2 */
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#define V_SCLK V_OSCK
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#undef CONFIG_USE_IRQ /* no support for IRQs */
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#define CONFIG_MISC_INIT_R
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#define CONFIG_CMDLINE_TAG 1 /* enable passing of ATAGs */
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#define CONFIG_SETUP_MEMORY_TAGS 1
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#define CONFIG_INITRD_TAG 1
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#define CONFIG_REVISION_TAG 1
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#define CONFIG_OF_LIBFDT 1
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/*
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* Size of malloc() pool
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* Total Size Environment - 256k
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* Malloc - add 256k
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*/
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#define CONFIG_ENV_SIZE (256 << 10)
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#define CONFIG_SYS_MALLOC_LEN (CONFIG_ENV_SIZE + (256 << 10))
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/* Vector Base */
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#define CONFIG_SYS_CA9_VECTOR_BASE SRAM_ROM_VECT_BASE
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/*
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* Hardware drivers
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*/
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/*
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* serial port - NS16550 compatible
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*/
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#define V_NS16550_CLK 48000000
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#define CONFIG_SYS_NS16550
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#define CONFIG_SYS_NS16550_SERIAL
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#define CONFIG_SYS_NS16550_REG_SIZE (-4)
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#define CONFIG_SYS_NS16550_CLK V_NS16550_CLK
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#define CONFIG_CONS_INDEX 3
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#define CONFIG_SYS_NS16550_COM3 UART3_BASE
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#define CONFIG_ENV_IS_NOWHERE
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#define CONFIG_BAUDRATE 115200
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#define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600,\
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115200}
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/* I2C */
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#define CONFIG_HARD_I2C 1
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#define CONFIG_SYS_I2C_SPEED 100000
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#define CONFIG_SYS_I2C_SLAVE 1
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#define CONFIG_SYS_I2C_BUS 0
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#define CONFIG_SYS_I2C_BUS_SELECT 1
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#define CONFIG_DRIVER_OMAP34XX_I2C 1
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#define CONFIG_I2C_MULTI_BUS 1
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/* TWL6030 */
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#define CONFIG_TWL6030_POWER 1
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/* MMC */
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#define CONFIG_GENERIC_MMC 1
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#define CONFIG_MMC 1
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#define CONFIG_OMAP_HSMMC 1
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#define CONFIG_SYS_MMC_SET_DEV 1
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#define CONFIG_DOS_PARTITION 1
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/* USB */
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#define CONFIG_MUSB_UDC 1
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#define CONFIG_USB_OMAP3 1
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/* USB device configuration */
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#define CONFIG_USB_DEVICE 1
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#define CONFIG_USB_TTY 1
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#define CONFIG_SYS_CONSOLE_IS_IN_ENV 1
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/* Flash */
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#define CONFIG_SYS_NO_FLASH 1
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/* commands to include */
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#include <config_cmd_default.h>
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/* Enabled commands */
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#define CONFIG_CMD_EXT2 /* EXT2 Support */
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#define CONFIG_CMD_FAT /* FAT support */
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#define CONFIG_CMD_I2C /* I2C serial bus support */
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#define CONFIG_CMD_MMC /* MMC support */
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/* Disabled commands */
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#undef CONFIG_CMD_NET
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#undef CONFIG_CMD_NFS
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#undef CONFIG_CMD_FPGA /* FPGA configuration Support */
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#undef CONFIG_CMD_IMLS /* List all found images */
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/*
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* Environment setup
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*/
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#define CONFIG_BOOTDELAY 3
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#define CONFIG_ENV_OVERWRITE
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#define CONFIG_EXTRA_ENV_SETTINGS \
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"loadaddr=0x82000000\0" \
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"console=ttyS2,115200n8\0" \
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"usbtty=cdc_acm\0" \
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"vram=16M\0" \
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"mmcdev=0\0" \
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"mmcroot=/dev/mmcblk0p2 rw\0" \
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"mmcrootfstype=ext3 rootwait\0" \
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"mmcargs=setenv bootargs console=${console} " \
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"vram=${vram} " \
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"root=${mmcroot} " \
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"rootfstype=${mmcrootfstype}\0" \
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"loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \
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"bootscript=echo Running bootscript from mmc${mmcdev} ...; " \
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"source ${loadaddr}\0" \
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"loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \
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"mmcboot=echo Booting from mmc${mmcdev} ...; " \
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"run mmcargs; " \
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"bootm ${loadaddr}\0" \
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#define CONFIG_BOOTCOMMAND \
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"if mmc rescan ${mmcdev}; then " \
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"if run loadbootscript; then " \
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"run bootscript; " \
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"else " \
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"if run loaduimage; then " \
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"run mmcboot; " \
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"fi; " \
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"fi; " \
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"fi"
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#define CONFIG_AUTO_COMPLETE 1
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/*
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* Miscellaneous configurable options
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*/
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#define CONFIG_SYS_LONGHELP /* undef to save memory */
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#define CONFIG_SYS_HUSH_PARSER /* use "hush" command parser */
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#define CONFIG_SYS_PROMPT_HUSH_PS2 "> "
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#define CONFIG_SYS_PROMPT "Panda # "
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#define CONFIG_SYS_CBSIZE 256
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/* Print Buffer Size */
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#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
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sizeof(CONFIG_SYS_PROMPT) + 16)
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#define CONFIG_SYS_MAXARGS 16
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/* Boot Argument Buffer Size */
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#define CONFIG_SYS_BARGSIZE (CONFIG_SYS_CBSIZE)
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/*
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* memtest setup
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*/
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#define CONFIG_SYS_MEMTEST_START 0x80000000
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#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + (32 << 20))
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/* Default load address */
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#define CONFIG_SYS_LOAD_ADDR 0x80000000
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/* Use General purpose timer 1 */
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#define CONFIG_SYS_TIMERBASE GPT2_BASE
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#define CONFIG_SYS_PTV 2 /* Divisor: 2^(PTV+1) => 8 */
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#define CONFIG_SYS_HZ 1000
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/*
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* Stack sizes
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*
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* The stack sizes are set up in start.S using the settings below
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*/
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#define CONFIG_STACKSIZE (128 << 10) /* Regular stack */
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#ifdef CONFIG_USE_IRQ
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#define CONFIG_STACKSIZE_IRQ (4 << 10) /* IRQ stack */
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#define CONFIG_STACKSIZE_FIQ (4 << 10) /* FIQ stack */
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#endif
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/*
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* SDRAM Memory Map
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* Even though we use two CS all the memory
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* is mapped to one contiguous block
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*/
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#define CONFIG_NR_DRAM_BANKS 1
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#define CONFIG_SYS_SDRAM_BASE 0x80000000
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#define CONFIG_SYS_INIT_RAM_ADDR 0x4030D800
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#define CONFIG_SYS_INIT_RAM_SIZE 0x800
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#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \
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CONFIG_SYS_INIT_RAM_SIZE - \
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GENERATED_GBL_DATA_SIZE)
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#ifndef CONFIG_SYS_L2CACHE_OFF
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#define CONFIG_SYS_L2_PL310 1
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#define CONFIG_SYS_PL310_BASE 0x48242000
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#endif
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/* Defines for SDRAM init */
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#ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
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#define CONFIG_SYS_AUTOMATIC_SDRAM_DETECTION
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#define CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS
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#endif
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#endif /* __CONFIG_H */
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