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/*
* Copyright (C) 2010 Juergen Beisert, Pengutronix <kernel@pengutronix.de>
*
* 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.
*/
#include <common.h>
#include <init.h>
#include <gpio.h>
#include <environment.h>
#include <errno.h>
#include <asm/armlinux.h>
#include <io.h>
#include <generated/mach-types.h>
#include <mach/imx-regs.h>
#include <mach/devices.h>
#include <mach/iomux.h>
#include <asm/mmu.h>
/* setup the CPU card internal signals */
static const uint32_t tx28_pad_setup[] = {
/* NAND interface */
GPMI_D0 | VE_3_3V | PULLUP(1),
GPMI_D1 | VE_3_3V | PULLUP(1),
GPMI_D2 | VE_3_3V | PULLUP(1),
GPMI_D3 | VE_3_3V | PULLUP(1),
GPMI_D4 | VE_3_3V | PULLUP(1),
GPMI_D5 | VE_3_3V | PULLUP(1),
GPMI_D6 | VE_3_3V | PULLUP(1),
GPMI_D7 | VE_3_3V | PULLUP(1),
GPMI_READY0 | VE_3_3V | PULLUP(0), /* external PU */
GPMI_CE0N | VE_3_3V | PULLUP(1),
GPMI_RDN | VE_3_3V | PULLUP(1),
GPMI_WRN | VE_3_3V | BITKEEPER(1),
GPMI_ALE | VE_3_3V | PULLUP(1),
GPMI_CLE | VE_3_3V | PULLUP(1),
GPMI_RESETN | VE_3_3V | PULLUP(0), /* external PU */
/* Network interface */
/*
* Note: To setup the external phy in a manner the baseboard
* supports, its configuration is divided into a small part here in
* the CPU card setup and the remaining configuration in the baseboard
* file.
* Here: Switch on the power supply to the external phy, but keep its
* reset line low.
*/
/* send a "good morning" to the ext. phy 0 = reset */
ENET0_RX_CLK_GPIO | VE_3_3V | PULLUP(0) | GPIO_OUT | GPIO_VALUE(0),
/* phy power control 1 = on */
PWM4_GPIO | VE_3_3V | GPIO_OUT | PULLUP(0) | GPIO_VALUE(1),
ENET_CLK | VE_3_3V | BITKEEPER(0),
ENET0_MDC | VE_3_3V | PULLUP(0),
ENET0_MDIO | VE_3_3V | PULLUP(0),
ENET0_TXD0 | VE_3_3V | PULLUP(0),
ENET0_TXD1 | VE_3_3V | PULLUP(0),
ENET0_TX_EN | VE_3_3V | PULLUP(0),
ENET0_TX_CLK | VE_3_3V | BITKEEPER(0),
};
extern void base_board_init(void);
static int tx28_mem_init(void)
{
arm_add_mem_device("ram0", IMX_MEMORY_BASE, 128 * 1024 * 1024);
return 0;
}
mem_initcall(tx28_mem_init);
static int tx28_devices_init(void)
{
int i;
/* initizalize gpios */
for (i = 0; i < ARRAY_SIZE(tx28_pad_setup); i++)
imx_gpio_mode(tx28_pad_setup[i]);
armlinux_set_architecture(MACH_TYPE_TX28);
base_board_init();
imx28_add_nand();
return 0;
}
device_initcall(tx28_devices_init);
/**
@page tx28 KARO's TX28 CPU module
@section tx28_cpu_card The CPU module
http://www.karo-electronics.de/
This CPU card is based on a Freescale i.MX28 CPU. The card is shipped with:
- 128 MiB synchronous dynamic RAM (DDR2 type), 200 MHz support
- 128 MiB NAND K9F1G08U0A (3.3V type)
- PCA9554 GPIO expander
- DS1339 RTC
- LAN8710 Phy
@section tx28_basboards Supported baseboards
Supported baseboards are:
- KARO's Starterkit 5
@section tx28_stk5_howto How to get barebox for 'KARO's Starterkit 5'
Using the default configuration:
@verbatim
make ARCH=arm tx28stk5_defconfig
@endverbatim
Build the binary image:
@verbatim
make ARCH=arm CROSS_COMPILE=armv5compiler
@endverbatim
@note replace the armv5compiler with your ARM v5 cross compiler.
@note To use the result, you also need the following resources from Freescale:
- the 'bootlets' archive
- the 'elftosb2' encryption tool
- in the case you want to start @b barebox from an attached SD card the
'sdimage' tool from Freescale's 'uuc' archive.
@section tx28_mlayout Memory layout when barebox is running:
- 0x40000000 start of SDRAM
- 0x40000100 start of kernel's boot parameters
- below malloc area: stack area
- below barebox: malloc area
- 0x47000000 start of @b barebox
*/
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