diff options
Diffstat (limited to 'board/egnite/ethernut5/ethernut5.c')
| -rw-r--r-- | board/egnite/ethernut5/ethernut5.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/board/egnite/ethernut5/ethernut5.c b/board/egnite/ethernut5/ethernut5.c new file mode 100644 index 0000000..e42e91e --- /dev/null +++ b/board/egnite/ethernut5/ethernut5.c @@ -0,0 +1,270 @@ +/* + * (C) Copyright 2011 + * egnite GmbH <info@egnite.de> + * + * (C) Copyright 2010 + * Ole Reinhardt <ole.reinhardt@thermotemp.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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 + */ + +/* + * 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 <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 "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 + at91_set_pio_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(u8 *cd, struct mmc *mmc) +{ + *cd = at91_get_pio_value(CONFIG_SYS_MMC_CD_PIN) ? 1 : 0; + return 0; +} +#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 |