| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2007-2008 |
| * Stelian Pop <stelian@popies.net> |
| * Lead Tech Design <www.leadtechdesign.com> |
| */ |
| |
| #include <common.h> |
| #include <asm/io.h> |
| #include <asm/arch/at91_common.h> |
| #include <asm/arch/clk.h> |
| #include <asm/arch/gpio.h> |
| |
| /* |
| * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all |
| * peripheral pins. Good to have if hardware is soldered optionally |
| * or in case of SPI no slave is selected. Avoid lines to float |
| * needlessly. Use a short local PUP define. |
| * |
| * Due to errata "TXD floats when CTS is inactive" pullups are always |
| * on for TXD pins. |
| */ |
| #ifdef CONFIG_AT91_GPIO_PULLUP |
| # define PUP CONFIG_AT91_GPIO_PULLUP |
| #else |
| # define PUP 0 |
| #endif |
| |
| void at91_serial0_hw_init(void) |
| { |
| at91_set_a_periph(AT91_PIO_PORTC, 8, 1); /* TXD0 */ |
| at91_set_a_periph(AT91_PIO_PORTC, 9, 0); /* RXD0 */ |
| at91_periph_clk_enable(ATMEL_ID_USART0); |
| } |
| |
| void at91_serial1_hw_init(void) |
| { |
| at91_set_a_periph(AT91_PIO_PORTC, 12, 1); /* TXD1 */ |
| at91_set_a_periph(AT91_PIO_PORTC, 13, 0); /* RXD1 */ |
| at91_periph_clk_enable(ATMEL_ID_USART1); |
| } |
| |
| void at91_serial2_hw_init(void) |
| { |
| at91_set_a_periph(AT91_PIO_PORTC, 14, 1); /* TXD2 */ |
| at91_set_a_periph(AT91_PIO_PORTC, 15, 0); /* RXD2 */ |
| at91_periph_clk_enable(ATMEL_ID_USART2); |
| } |
| |
| void at91_seriald_hw_init(void) |
| { |
| at91_set_a_periph(AT91_PIO_PORTA, 9, 0); /* DRXD */ |
| at91_set_a_periph(AT91_PIO_PORTA, 10, 1); /* DTXD */ |
| at91_periph_clk_enable(ATMEL_ID_SYS); |
| } |
| |
| #ifdef CONFIG_ATMEL_SPI |
| void at91_spi0_hw_init(unsigned long cs_mask) |
| { |
| at91_set_a_periph(AT91_PIO_PORTA, 0, PUP); /* SPI0_MISO */ |
| at91_set_a_periph(AT91_PIO_PORTA, 1, PUP); /* SPI0_MOSI */ |
| at91_set_a_periph(AT91_PIO_PORTA, 2, PUP); /* SPI0_SPCK */ |
| |
| at91_periph_clk_enable(ATMEL_ID_SPI0); |
| |
| if (cs_mask & (1 << 0)) { |
| at91_set_a_periph(AT91_PIO_PORTA, 3, 1); |
| } |
| if (cs_mask & (1 << 1)) { |
| at91_set_a_periph(AT91_PIO_PORTA, 4, 1); |
| } |
| if (cs_mask & (1 << 2)) { |
| at91_set_a_periph(AT91_PIO_PORTA, 5, 1); |
| } |
| if (cs_mask & (1 << 3)) { |
| at91_set_a_periph(AT91_PIO_PORTA, 6, 1); |
| } |
| if (cs_mask & (1 << 4)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 3, 1); |
| } |
| if (cs_mask & (1 << 5)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 4, 1); |
| } |
| if (cs_mask & (1 << 6)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 5, 1); |
| } |
| if (cs_mask & (1 << 7)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 6, 1); |
| } |
| } |
| |
| void at91_spi1_hw_init(unsigned long cs_mask) |
| { |
| at91_set_a_periph(AT91_PIO_PORTB, 30, PUP); /* SPI1_MISO */ |
| at91_set_a_periph(AT91_PIO_PORTB, 31, PUP); /* SPI1_MOSI */ |
| at91_set_a_periph(AT91_PIO_PORTB, 29, PUP); /* SPI1_SPCK */ |
| |
| at91_periph_clk_enable(ATMEL_ID_SPI1); |
| |
| if (cs_mask & (1 << 0)) { |
| at91_set_a_periph(AT91_PIO_PORTB, 28, 1); |
| } |
| if (cs_mask & (1 << 1)) { |
| at91_set_b_periph(AT91_PIO_PORTA, 24, 1); |
| } |
| if (cs_mask & (1 << 2)) { |
| at91_set_b_periph(AT91_PIO_PORTA, 25, 1); |
| } |
| if (cs_mask & (1 << 3)) { |
| at91_set_a_periph(AT91_PIO_PORTA, 26, 1); |
| } |
| if (cs_mask & (1 << 4)) { |
| at91_set_pio_output(AT91_PIO_PORTB, 28, 1); |
| } |
| if (cs_mask & (1 << 5)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 24, 1); |
| } |
| if (cs_mask & (1 << 6)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 25, 1); |
| } |
| if (cs_mask & (1 << 7)) { |
| at91_set_pio_output(AT91_PIO_PORTA, 26, 1); |
| } |
| } |
| #endif |
