git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1_FreedomStudio/freedom-metal/src/drivers/sifive_gpio-buttons.c

   1 /* Copyright 2018 SiFive, Inc */
   2 /* SPDX-License-Identifier: Apache-2.0 */
   3
   4 #include <metal/machine/platform.h>
   5
   6 #ifdef METAL_SIFIVE_GPIO_BUTTONS
   7
   8 #include <string.h>
   9 #include <metal/drivers/riscv_cpu.h>
  10 #include <metal/drivers/sifive_gpio-buttons.h>
  11 #include <metal/machine.h>
  12
  13 int  __metal_driver_button_exist (struct metal_button *button, char *label)
  14 {
  15     if (strcmp(__metal_driver_sifive_gpio_button_label(button), label) == 0) {
  16         return 1;
  17     }
  18     return 0;
  19 }
  20
  21 struct metal_interrupt *
  22 __metal_driver_button_interrupt_controller(struct metal_button *button)
  23 {
  24     return __metal_driver_sifive_gpio_button_interrupt_controller(button);
  25 }
  26
  27 int __metal_driver_button_get_interrupt_id(struct metal_button *button)
  28 {
  29     int irq, max_irq;
  30     struct metal_interrupt *irc;
  31
  32     irq = __metal_driver_sifive_gpio_button_interrupt_line(button);
  33     irc =  __metal_driver_sifive_gpio_button_interrupt_controller(button);
  34
  35     if (irc != NULL) {
  36         max_irq = _metal_interrupt_command_request(irc,
  37                                                    METAL_MAX_INTERRUPT_GET,
  38                                                    NULL);
  39
  40         if (irq < max_irq) {
  41             return _metal_interrupt_command_request(irc,
  42                                                  METAL_INDEX_INTERRUPT_GET,
  43                                                  (void *)&irq);
  44         }
  45     }
  46     return METAL_INTERRUPT_ID_LCMX;
  47 }
  48
  49 __METAL_DEFINE_VTABLE(__metal_driver_vtable_sifive_button) = {
  50     .button_vtable.button_exist   = __metal_driver_button_exist,
  51     .button_vtable.interrupt_controller = __metal_driver_button_interrupt_controller,
  52     .button_vtable.get_interrupt_id = __metal_driver_button_get_interrupt_id,
  53 };
  54
  55 #endif
  56
  57 typedef int no_empty_translation_units;