| /* |
| * Copyright (C) 2010 |
| * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/arch/hardware.h> |
| #include <asm/arch/at91_spi.h> |
| #include <asm/arch/gpio.h> |
| #include <spi.h> |
| |
| static const struct { |
| u32 port; |
| u32 bit; |
| } cs_to_portbit[2][4] = { |
| {{AT91_PIO_PORTA, 3}, {AT91_PIO_PORTC, 11}, |
| {AT91_PIO_PORTC, 16}, {AT91_PIO_PORTC, 17} }, |
| {{AT91_PIO_PORTB, 3}, {AT91_PIO_PORTC, 5}, |
| {AT91_PIO_PORTC, 4}, {AT91_PIO_PORTC, 3} } |
| }; |
| |
| int spi_cs_is_valid(unsigned int bus, unsigned int cs) |
| { |
| debug("spi_cs_is_valid: bus=%u cs=%u\n", bus, cs); |
| if (bus < 2 && cs < 4) |
| return 1; |
| return 0; |
| } |
| |
| void spi_cs_activate(struct spi_slave *slave) |
| { |
| debug("spi_cs_activate: bus=%u cs=%u\n", slave->bus, slave->cs); |
| at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port, |
| cs_to_portbit[slave->bus][slave->cs].bit, 0); |
| } |
| |
| void spi_cs_deactivate(struct spi_slave *slave) |
| { |
| debug("spi_cs_deactivate: bus=%u cs=%u\n", slave->bus, slave->cs); |
| at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port, |
| cs_to_portbit[slave->bus][slave->cs].bit, 1); |
| } |