1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * egnite GmbH <info@egnite.de>
6 * Configuation settings for Ethernut 5 with AT91SAM9XE.
12 #include <asm/hardware.h>
14 /* The first stage boot loader expects u-boot running at this address. */
16 /* The first stage boot loader takes care of low level initialization. */
20 /* ARM asynchronous clock */
21 #define CFG_SYS_AT91_SLOW_CLOCK 32768 /* slow clock xtal */
22 #define CFG_SYS_AT91_MAIN_CLOCK 18432000 /* 18.432 MHz crystal */
24 /* 32kB internal SRAM */
25 #define CFG_SYS_INIT_RAM_ADDR 0x00300000 /*AT91SAM9XE_SRAM_BASE */
26 #define CFG_SYS_INIT_RAM_SIZE (32 << 10)
28 /* 128MB SDRAM in 1 bank */
29 #define CFG_SYS_SDRAM_BASE 0x20000000
30 #define CFG_SYS_SDRAM_SIZE (128 << 20)
32 /* 512kB on-chip NOR flash */
33 # define CFG_SYS_FLASH_BASE 0x00200000 /* AT91SAM9XE_FLASH_BASE */
36 /* bootstrap + u-boot + env + linux in dataflash on CS0 */
39 #ifdef CONFIG_CMD_NAND
40 #define CFG_SYS_NAND_BASE 0x40000000
42 #define CFG_SYS_NAND_MASK_ALE (1 << 21)
44 #define CFG_SYS_NAND_MASK_CLE (1 << 22)
45 #define CFG_SYS_NAND_ENABLE_PIN GPIO_PIN_PC(14)
55 #define CFG_SYS_MMC_CD_PIN AT91_PIO_PORTC, 8
59 #if defined(CONFIG_CMD_DATE) || defined(CONFIG_CMD_SNTP)
60 #define CFG_SYS_I2C_RTC_ADDR 0x51
64 #define CFG_SYS_MAX_I2C_BUS 1
66 #define I2C_SOFT_DECLARATIONS
68 #define GPIO_I2C_SCL AT91_PIO_PORTA, 24
69 #define GPIO_I2C_SDA AT91_PIO_PORTA, 23
72 at91_set_pio_periph(AT91_PIO_PORTA, 23, 0); \
73 at91_set_pio_multi_drive(AT91_PIO_PORTA, 23, 1); \
74 at91_set_pio_periph(AT91_PIO_PORTA, 24, 0); \
75 at91_set_pio_output(AT91_PIO_PORTA, 24, 0); \
76 at91_set_pio_multi_drive(AT91_PIO_PORTA, 24, 1); \
79 #define I2C_ACTIVE at91_set_pio_output(AT91_PIO_PORTA, 23, 0)
80 #define I2C_TRISTATE at91_set_pio_input(AT91_PIO_PORTA, 23, 0)
81 #define I2C_SCL(bit) at91_set_pio_value(AT91_PIO_PORTA, 24, bit)
82 #define I2C_SDA(bit) at91_set_pio_value(AT91_PIO_PORTA, 23, bit)
83 #define I2C_DELAY udelay(100)
84 #define I2C_READ at91_get_pio_value(AT91_PIO_PORTA, 23)
90 /* Misc. u-boot settings */