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Diffstat (limited to 'c/src/lib/libbsp/arm/raspberrypi/gpio/rpi-gpio.c')
-rw-r--r--c/src/lib/libbsp/arm/raspberrypi/gpio/rpi-gpio.c335
1 files changed, 0 insertions, 335 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/gpio/rpi-gpio.c b/c/src/lib/libbsp/arm/raspberrypi/gpio/rpi-gpio.c
deleted file mode 100644
index 6c01d62404..0000000000
--- a/c/src/lib/libbsp/arm/raspberrypi/gpio/rpi-gpio.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/**
- * @file rpi-gpio.c
- *
- * @ingroup raspberrypi_gpio
- *
- * @brief Support for the Raspberry PI GPIO.
- */
-
-/*
- * Copyright (c) 2014-2015 Andre Marques <andre.lousa.marques at gmail.com>
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
- */
-
-#include <bsp.h>
-#include <bsp/raspberrypi.h>
-#include <bsp/irq-generic.h>
-#include <bsp/gpio.h>
-#include <bsp/rpi-gpio.h>
-
-#include <stdlib.h>
-
-RTEMS_INTERRUPT_LOCK_DEFINE( static, rtems_gpio_bsp_lock, "rtems_gpio_bsp_lock" );
-
-/* Calculates a bitmask to assign an alternate function to a given pin. */
-#define SELECT_PIN_FUNCTION(fn, pn) (fn << ((pn % 10) * 3))
-
-rtems_gpio_specific_data alt_func_def[] = {
- {.io_function = RPI_ALT_FUNC_0, .pin_data = NULL},
- {.io_function = RPI_ALT_FUNC_1, .pin_data = NULL},
- {.io_function = RPI_ALT_FUNC_2, .pin_data = NULL},
- {.io_function = RPI_ALT_FUNC_3, .pin_data = NULL},
- {.io_function = RPI_ALT_FUNC_4, .pin_data = NULL},
- {.io_function = RPI_ALT_FUNC_5, .pin_data = NULL}
-};
-
-/* Raspberry Pi 1 Revision 2 gpio interface definitions. */
-#include "gpio-interfaces-pi1-rev2.c"
-
-/* Waits a number of CPU cycles. */
-static void arm_delay(uint8_t cycles)
-{
- uint8_t i;
-
- for ( i = 0; i < cycles; ++i ) {
- asm volatile("nop");
- }
-}
-
-static rtems_status_code rpi_select_pin_function(
- uint32_t bank,
- uint32_t pin,
- uint32_t type
-) {
- /* Calculate the pin function select register address. */
- volatile uint32_t *pin_addr = (uint32_t *) BCM2835_GPIO_REGS_BASE +
- (pin / 10);
- uint32_t reg_old;
- uint32_t reg_new;
- rtems_interrupt_lock_context lock_context;
-
- rtems_interrupt_lock_acquire(&rtems_gpio_bsp_lock, &lock_context);
- reg_new = reg_old = *pin_addr;
- reg_new &= ~SELECT_PIN_FUNCTION(RPI_ALT_FUNC_MASK, pin);
- reg_new |= SELECT_PIN_FUNCTION(type, pin);
- *pin_addr = reg_new;
- rtems_interrupt_lock_release(&rtems_gpio_bsp_lock, &lock_context);
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_gpio_bsp_multi_set(uint32_t bank, uint32_t bitmask)
-{
- BCM2835_REG(BCM2835_GPIO_GPSET0) = bitmask;
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_gpio_bsp_multi_clear(uint32_t bank, uint32_t bitmask)
-{
- BCM2835_REG(BCM2835_GPIO_GPCLR0) = bitmask;
-
- return RTEMS_SUCCESSFUL;
-}
-
-uint32_t rtems_gpio_bsp_multi_read(uint32_t bank, uint32_t bitmask)
-{
- return (BCM2835_REG(BCM2835_GPIO_GPLEV0) & bitmask);
-}
-
-rtems_status_code rtems_gpio_bsp_set(uint32_t bank, uint32_t pin)
-{
- BCM2835_REG(BCM2835_GPIO_GPSET0) = (1 << pin);
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_gpio_bsp_clear(uint32_t bank, uint32_t pin)
-{
- BCM2835_REG(BCM2835_GPIO_GPCLR0) = (1 << pin);
-
- return RTEMS_SUCCESSFUL;
-}
-
-uint32_t rtems_gpio_bsp_get_value(uint32_t bank, uint32_t pin)
-{
- return (BCM2835_REG(BCM2835_GPIO_GPLEV0) & (1 << pin));
-}
-
-rtems_status_code rtems_gpio_bsp_select_input(
- uint32_t bank,
- uint32_t pin,
- void *bsp_specific
-) {
- return rpi_select_pin_function(bank, pin, RPI_DIGITAL_IN);
-}
-
-rtems_status_code rtems_gpio_bsp_select_output(
- uint32_t bank,
- uint32_t pin,
- void *bsp_specific
-) {
- return rpi_select_pin_function(bank, pin, RPI_DIGITAL_OUT);
-}
-
-rtems_status_code rtems_gpio_bsp_select_specific_io(
- uint32_t bank,
- uint32_t pin,
- uint32_t function,
- void *pin_data
-) {
- return rpi_select_pin_function(bank, pin, function);
-}
-
-rtems_status_code rtems_gpio_bsp_set_resistor_mode(
- uint32_t bank,
- uint32_t pin,
- rtems_gpio_pull_mode mode
-) {
- /* Set control signal. */
- switch ( mode ) {
- case PULL_UP:
- BCM2835_REG(BCM2835_GPIO_GPPUD) = (1 << 1);
- break;
- case PULL_DOWN:
- BCM2835_REG(BCM2835_GPIO_GPPUD) = (1 << 0);
- break;
- case NO_PULL_RESISTOR:
- BCM2835_REG(BCM2835_GPIO_GPPUD) = 0;
- break;
- default:
- return RTEMS_UNSATISFIED;
- }
-
- /* Wait 150 cyles, as per BCM2835 documentation. */
- arm_delay(150);
-
- /* Setup clock for the control signal. */
- BCM2835_REG(BCM2835_GPIO_GPPUDCLK0) = (1 << pin);
-
- arm_delay(150);
-
- /* Remove the control signal. */
- BCM2835_REG(BCM2835_GPIO_GPPUD) = 0;
-
- /* Remove the clock. */
- BCM2835_REG(BCM2835_GPIO_GPPUDCLK0) = 0;
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_vector_number rtems_gpio_bsp_get_vector(uint32_t bank)
-{
- return BCM2835_IRQ_ID_GPIO_0;
-}
-
-uint32_t rtems_gpio_bsp_interrupt_line(rtems_vector_number vector)
-{
- uint32_t event_status;
-
- /* Retrieve the interrupt event status. */
- event_status = BCM2835_REG(BCM2835_GPIO_GPEDS0);
-
- /* Clear the interrupt line. */
- BCM2835_REG(BCM2835_GPIO_GPEDS0) = event_status;
-
- return event_status;
-}
-
-rtems_status_code rtems_gpio_bsp_enable_interrupt(
- uint32_t bank,
- uint32_t pin,
- rtems_gpio_interrupt interrupt
-) {
- switch ( interrupt ) {
- case FALLING_EDGE:
- /* Enables asynchronous falling edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAFEN0) |= (1 << pin);
- break;
- case RISING_EDGE:
- /* Enables asynchronous rising edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAREN0) |= (1 << pin);
- break;
- case BOTH_EDGES:
- /* Enables asynchronous falling edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAFEN0) |= (1 << pin);
-
- /* Enables asynchronous rising edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAREN0) |= (1 << pin);
- break;
- case LOW_LEVEL:
- /* Enables pin low level detection. */
- BCM2835_REG(BCM2835_GPIO_GPLEN0) |= (1 << pin);
- break;
- case HIGH_LEVEL:
- /* Enables pin high level detection. */
- BCM2835_REG(BCM2835_GPIO_GPHEN0) |= (1 << pin);
- break;
- case BOTH_LEVELS:
- /* Enables pin low level detection. */
- BCM2835_REG(BCM2835_GPIO_GPLEN0) |= (1 << pin);
-
- /* Enables pin high level detection. */
- BCM2835_REG(BCM2835_GPIO_GPHEN0) |= (1 << pin);
- break;
- case NONE:
- default:
- return RTEMS_UNSATISFIED;
- }
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_gpio_bsp_disable_interrupt(
- uint32_t bank,
- uint32_t pin,
- rtems_gpio_interrupt interrupt
-) {
- switch ( interrupt ) {
- case FALLING_EDGE:
- /* Disables asynchronous falling edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAFEN0) &= ~(1 << pin);
- break;
- case RISING_EDGE:
- /* Disables asynchronous rising edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAREN0) &= ~(1 << pin);
- break;
- case BOTH_EDGES:
- /* Disables asynchronous falling edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAFEN0) &= ~(1 << pin);
-
- /* Disables asynchronous rising edge detection. */
- BCM2835_REG(BCM2835_GPIO_GPAREN0) &= ~(1 << pin);
- break;
- case LOW_LEVEL:
- /* Disables pin low level detection. */
- BCM2835_REG(BCM2835_GPIO_GPLEN0) &= ~(1 << pin);
- break;
- case HIGH_LEVEL:
- /* Disables pin high level detection. */
- BCM2835_REG(BCM2835_GPIO_GPHEN0) &= ~(1 << pin);
- break;
- case BOTH_LEVELS:
- /* Disables pin low level detection. */
- BCM2835_REG(BCM2835_GPIO_GPLEN0) &= ~(1 << pin);
-
- /* Disables pin high level detection. */
- BCM2835_REG(BCM2835_GPIO_GPHEN0) &= ~(1 << pin);
- break;
- case NONE:
- default:
- return RTEMS_UNSATISFIED;
- }
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rpi_gpio_select_jtag(void)
-{
- return rtems_gpio_multi_select(jtag_config, JTAG_PIN_COUNT);
-}
-
-rtems_status_code rpi_gpio_select_spi(void)
-{
- return rtems_gpio_multi_select(spi_config, SPI_PIN_COUNT);
-}
-
-rtems_status_code rpi_gpio_select_i2c(void)
-{
- return rtems_gpio_multi_select(i2c_config, I2C_PIN_COUNT);
-}
-
-rtems_status_code rtems_gpio_bsp_multi_select(
- rtems_gpio_multiple_pin_select *pins,
- uint32_t pin_count,
- uint32_t select_bank
-) {
- uint32_t register_address;
- uint32_t select_register;
- uint8_t i;
-
- register_address = BCM2835_GPIO_REGS_BASE + (select_bank * 0x04);
-
- select_register = BCM2835_REG(register_address);
-
- for ( i = 0; i < pin_count; ++i ) {
- if ( pins[i].function == DIGITAL_INPUT ) {
- select_register &=
- ~SELECT_PIN_FUNCTION(RPI_DIGITAL_IN, pins[i].pin_number);
- }
- else if ( pins[i].function == DIGITAL_OUTPUT ) {
- select_register |=
- SELECT_PIN_FUNCTION(RPI_DIGITAL_OUT, pins[i].pin_number);
- }
- else { /* BSP_SPECIFIC function. */
- select_register |=
- SELECT_PIN_FUNCTION(pins[i].io_function, pins[i].pin_number);
- }
- }
-
- BCM2835_REG(register_address) = select_register;
-
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code rtems_gpio_bsp_specific_group_operation(
- uint32_t bank,
- uint32_t *pins,
- uint32_t pin_count,
- void *arg
-) {
- return RTEMS_NOT_DEFINED;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 08:16:56 +0000