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/*
* (C) Copyright 2011
* egnite GmbH <info@egnite.de>
*
* (C) Copyright 2010
* Ole Reinhardt <ole.reinhardt@thermotemp.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Ethernut 5 general board support
*
* Ethernut is an open source hardware and software project for
* embedded Ethernet devices. Hardware layouts and CAD files are
* freely available under BSD-like license.
*
* Ethernut 5 is the first member of the Ethernut board family
* with U-Boot and Linux support. This implementation is based
* on the original work done by Ole Reinhardt, but heavily modified
* to support additional features and the latest board revision 5.0F.
*
* Main board components are by default:
*
* Atmel AT91SAM9XE512 CPU with 512 kBytes NOR Flash
* 2 x 64 MBytes Micron MT48LC32M16A2P SDRAM
* 512 MBytes Micron MT29F4G08ABADA NAND Flash
* 4 MBytes Atmel AT45DB321D DataFlash
* SMSC LAN8710 Ethernet PHY
* Atmel ATmega168 MCU used for power management
* Linear Technology LTC4411 PoE controller
*
* U-Boot relevant board interfaces are:
*
* 100 Mbit Ethernet with IEEE 802.3af PoE
* RS-232 serial port
* USB host and device
* MMC/SD-Card slot
* Expansion port with I2C, SPI and more...
*
* Typically the U-Boot image is loaded from serial DataFlash into
* SDRAM by the samboot boot loader, which is located in internal
* NOR Flash and provides all essential initializations like CPU
* and peripheral clocks and, of course, the SDRAM configuration.
*
* For testing purposes it is also possibly to directly transfer
* the image into SDRAM via JTAG. A tested configuration exists
* for the Turtelizer 2 hardware dongle and the OpenOCD software.
* In this case the latter will do the basic hardware configuration
* via its reset-init script.
*
* For additional information visit the project home page at
* http://www.ethernut.de/
*/
#include <common.h>
#include <net.h>
#include <netdev.h>
#include <miiphy.h>
#include <i2c.h>
#include <spi.h>
#include <dataflash.h>
#include <mmc.h>
#include <atmel_mci.h>
#include <asm/arch/at91sam9260.h>
#include <asm/arch/at91sam9260_matrix.h>
#include <asm/arch/at91sam9_smc.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/at91_spi.h>
#include <asm/arch/gpio.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include "ethernut5_pwrman.h"
DECLARE_GLOBAL_DATA_PTR;
AT91S_DATAFLASH_INFO dataflash_info[CONFIG_SYS_MAX_DATAFLASH_BANKS];
struct dataflash_addr cs[CONFIG_SYS_MAX_DATAFLASH_BANKS] = {
{CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0, 0}
};
/*
* In fact we have 7 partitions, but u-boot supports 5 only. This is
* no big deal, because the first partition is reserved for applications
* and the last one is used by Nut/OS. Both need not to be visible here.
*/
dataflash_protect_t area_list[NB_DATAFLASH_AREA] = {
{ 0x00021000, 0x00041FFF, FLAG_PROTECT_SET, 0, "setup" },
{ 0x00042000, 0x000C5FFF, FLAG_PROTECT_SET, 0, "uboot" },
{ 0x000C6000, 0x00359FFF, FLAG_PROTECT_SET, 0, "kernel" },
{ 0x0035A000, 0x003DDFFF, FLAG_PROTECT_SET, 0, "nutos" },
{ 0x003DE000, 0x003FEFFF, FLAG_PROTECT_CLEAR, 0, "env" }
};
/*
* This is called last during early initialization. Most of the basic
* hardware interfaces are up and running.
*
* The SDRAM hardware has been configured by the first stage boot loader.
* We only need to announce its size, using u-boot's memory check.
*/
int dram_init(void)
{
gd->ram_size = get_ram_size(
(void *)CONFIG_SYS_SDRAM_BASE,
CONFIG_SYS_SDRAM_SIZE);
return 0;
}
#ifdef CONFIG_CMD_NAND
static void ethernut5_nand_hw_init(void)
{
struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
unsigned long csa;
/* Assign CS3 to NAND/SmartMedia Interface */
csa = readl(&matrix->ebicsa);
csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
writel(csa, &matrix->ebicsa);
/* Configure SMC CS3 for NAND/SmartMedia */
writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) |
AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
&smc->cs[3].setup);
writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(3) |
AT91_SMC_PULSE_NRD(3) | AT91_SMC_PULSE_NCS_RD(3),
&smc->cs[3].pulse);
writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5),
&smc->cs[3].cycle);
writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
AT91_SMC_MODE_EXNW_DISABLE |
AT91_SMC_MODE_DBW_8 |
AT91_SMC_MODE_TDF_CYCLE(2),
&smc->cs[3].mode);
#ifdef CONFIG_SYS_NAND_READY_PIN
/* Ready pin is optional. */
at91_set_pio_input(CONFIG_SYS_NAND_READY_PIN, 1);
#endif
gpio_direction_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
}
#endif
/*
* This is called first during late initialization.
*/
int board_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
/* Enable clocks for all PIOs */
writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
(1 << ATMEL_ID_PIOC),
&pmc->pcer);
/* Set adress of boot parameters. */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
/* Initialize UARTs and power management. */
at91_seriald_hw_init();
ethernut5_power_init();
#ifdef CONFIG_CMD_NAND
ethernut5_nand_hw_init();
#endif
#ifdef CONFIG_HAS_DATAFLASH
at91_spi0_hw_init(1 << 0);
#endif
return 0;
}
#ifdef CONFIG_MACB
/*
* This is optionally called last during late initialization.
*/
int board_eth_init(bd_t *bis)
{
const char *devname;
unsigned short mode;
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
/* Enable on-chip EMAC clock. */
writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
/* Need to reset PHY via power management. */
ethernut5_phy_reset();
/* Set peripheral pins. */
at91_macb_hw_init();
/* Basic EMAC initialization. */
if (macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, CONFIG_PHY_ID))
return -1;
/*
* Early board revisions have a pull-down at the PHY's MODE0
* strap pin, which forces the PHY into power down. Here we
* switch to all-capable mode.
*/
devname = miiphy_get_current_dev();
if (miiphy_read(devname, 0, 18, &mode) == 0) {
/* Set mode[2:0] to 0b111. */
mode |= 0x00E0;
miiphy_write(devname, 0, 18, mode);
/* Soft reset overrides strap pins. */
miiphy_write(devname, 0, MII_BMCR, BMCR_RESET);
}
/* Sync environment with network devices, needed for nfsroot. */
return eth_init(gd->bd);
}
#endif
#ifdef CONFIG_GENERIC_ATMEL_MCI
int board_mmc_init(bd_t *bd)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
/* Enable MCI clock. */
writel(1 << ATMEL_ID_MCI, &pmc->pcer);
/* Initialize MCI hardware. */
at91_mci_hw_init();
/* Register the device. */
return atmel_mci_init((void *)ATMEL_BASE_MCI);
}
int board_mmc_getcd(struct mmc *mmc)
{
return !at91_get_pio_value(CONFIG_SYS_MMC_CD_PIN);
}
#endif
#ifdef CONFIG_ATMEL_SPI
/*
* Note, that u-boot uses different code for SPI bus access. While
* memory routines use automatic chip select control, the serial
* flash support requires 'manual' GPIO control. Thus, we switch
* modes.
*/
void spi_cs_activate(struct spi_slave *slave)
{
/* Enable NPCS0 in GPIO mode. This disables peripheral control. */
at91_set_pio_output(AT91_PIO_PORTA, 3, 0);
}
void spi_cs_deactivate(struct spi_slave *slave)
{
/* Disable NPCS0 in GPIO mode. */
at91_set_pio_output(AT91_PIO_PORTA, 3, 1);
/* Switch back to peripheral chip select control. */
at91_set_a_periph(AT91_PIO_PORTA, 3, 1);
}
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
return bus == 0 && cs == 0;
}
#endif
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