diff options
Diffstat (limited to 'chip/max32660/gpio_chip.c')
| -rw-r--r-- | chip/max32660/gpio_chip.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/chip/max32660/gpio_chip.c b/chip/max32660/gpio_chip.c deleted file mode 100644 index 5fe38cd657..0000000000 --- a/chip/max32660/gpio_chip.c +++ /dev/null @@ -1,241 +0,0 @@ -/* Copyright 2019 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* MAX32660 GPIO module for Chrome EC */ - -#include "clock.h" -#include "console.h" -#include "common.h" -#include "gpio.h" -#include "hooks.h" -#include "switch.h" -#include "task.h" -#include "timer.h" -#include "util.h" -#include "registers.h" -#include "gpio_regs.h" - -#define CPRINTF(format, args...) cprintf(CC_GPIO, format, ##args) -#define CPRINTS(format, args...) cprints(CC_GPIO, format, ##args) - -/* 0-terminated list of GPIO base addresses */ -static mxc_gpio_regs_t *gpio_bases[] = {MXC_GPIO0, 0}; - -void gpio_set_alternate_function(uint32_t port, uint32_t mask, - enum gpio_alternate_func func) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(port); - - switch (func) { - case GPIO_ALT_FUNC_1: - gpio->en_clr = mask; - gpio->en1_clr = mask; - break; - case GPIO_ALT_FUNC_2: - gpio->en_clr = mask; - gpio->en1_set = mask; - break; - case GPIO_ALT_FUNC_3: - gpio->en_set = mask; - gpio->en1_set = mask; - break; - default: - /* Default as input */ - gpio->out_en_clr = mask; - gpio->en_set = mask; - gpio->en1_clr = mask; - break; - } -} - -test_mockable int gpio_get_level(enum gpio_signal signal) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpio_list[signal].port); - - return (gpio->in & gpio_list[signal].mask); -} - -void gpio_set_level(enum gpio_signal signal, int value) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpio_list[signal].port); - - if (value) { - gpio->out_set = gpio_list[signal].mask; - } else { - gpio->out_clr = gpio_list[signal].mask; - } -} - -void gpio_set_flags_by_mask(uint32_t port, uint32_t mask, uint32_t flags) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(port); - - /* Setup for either an output or input. */ - if (flags & GPIO_OUTPUT) { - gpio->out_en_set = mask; - gpio->en_set = mask; - gpio->en1_clr = mask; - } else { - gpio->out_en_clr = mask; - gpio->en_set = mask; - gpio->en1_clr = mask; - } - - /* Handle pull up, pull down or neither. */ - if (flags & GPIO_PULL_UP) { - gpio->pad_cfg1 |= mask; - gpio->pad_cfg2 &= ~mask; - gpio->ps |= mask; - } else if (flags & GPIO_PULL_DOWN) { - gpio->pad_cfg1 &= ~mask; - gpio->pad_cfg2 |= mask; - gpio->ps &= ~mask; - } else { - /* No pull up/down */ - gpio->pad_cfg1 &= ~mask; - gpio->pad_cfg2 &= ~mask; - gpio->ps &= ~mask; - } - - /* Handle setting up level interrupts. */ - if (flags & GPIO_INT_F_HIGH) { - /* Level triggered mode. */ - gpio->int_mod &= ~mask; - /* Level high generates interrupt. */ - gpio->int_pol |= mask; - } else if (flags & GPIO_INT_F_LOW) { - /* Level triggered mode. */ - gpio->int_mod &= ~mask; - /* Level low generates interrupt. */ - gpio->int_pol &= ~mask; - } - - /* Handle setting up edge interrupts. */ - if (flags & GPIO_INT_F_RISING) { - /* Edge triggered mode. */ - gpio->int_mod |= mask; - /* Rising edge generates interrupt. */ - gpio->int_pol |= mask; - } else if (flags & GPIO_INT_F_FALLING) { - /* Edge triggered mode. */ - gpio->int_mod |= mask; - /* Falling edge generates interrupt. */ - gpio->int_pol &= ~mask; - } - - /* Handle interrupting on both edges. */ - if ((flags & GPIO_INT_F_RISING) && (flags & GPIO_INT_F_FALLING)) { - /* Dual edge triggered mode. */ - gpio->int_dual_edge |= mask; - } else { - /* Not dual edge triggered mode. */ - gpio->int_dual_edge &= ~mask; - } - - /* Set the gpio pin high or low. */ - if (flags & GPIO_HIGH) { - gpio->out_set = mask; - } else if (flags & GPIO_LOW) { - gpio->out_clr = mask; - } -} - -int gpio_enable_interrupt(enum gpio_signal signal) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpio_list[signal].port); - - gpio->int_en_set = gpio_list[signal].mask; - return EC_SUCCESS; -} - -int gpio_disable_interrupt(enum gpio_signal signal) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpio_list[signal].port); - - gpio->int_en_clr = gpio_list[signal].mask; - return EC_SUCCESS; -} - -int gpio_clear_pending_interrupt(enum gpio_signal signal) -{ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpio_list[signal].port); - - gpio->int_clr = gpio_list[signal].mask; - return EC_SUCCESS; -} - -void gpio_pre_init(void) -{ - const struct gpio_info *g = gpio_list; - int i; - - /* Mask all GPIO interrupts */ - for (i = 0; gpio_bases[i]; i++) - gpio_bases[i]->int_en = 0; - - /* Set all GPIOs to defaults */ - for (i = 0; i < GPIO_COUNT; i++, g++) { - int flags = g->flags; - - if (flags & GPIO_DEFAULT) - continue; - - /* Use as GPIO, not alternate function */ - gpio_set_alternate_function(g->port, g->mask, - GPIO_ALT_FUNC_NONE); - - /* Set up GPIO based on flags */ - gpio_set_flags_by_mask(g->port, g->mask, flags); - } -} - -static void gpio_init(void) -{ - /* - * Enable global GPIO0 Port interrupt. Note that interrupts still need to be - * enabled at the per pin level. - */ - task_enable_irq(EC_GPIO0_IRQn); -} -DECLARE_HOOK(HOOK_INIT, gpio_init, HOOK_PRIO_DEFAULT); - -/*****************************************************************************/ -/* Interrupt handlers */ - -/** - * Handle a GPIO interrupt. - * - * port GPIO port - * mis Masked interrupt status value for that port - */ -static void gpio_interrupt(int port, uint32_t mis) -{ - int i = 0; - const struct gpio_info *g = gpio_list; - - for (i = 0; i < GPIO_IH_COUNT && mis; i++, g++) { - if (port == g->port && (mis & g->mask)) { - gpio_irq_handlers[i](i); - mis &= ~g->mask; - } - } -} - -/** - * Handlers for each GPIO port. Read the interrupt status, call the common GPIO - * interrupt handler and clear the GPIO hardware interrupt status. - */ -#define GPIO_IRQ_FUNC(irqfunc, gpiobase) \ - void irqfunc(void) \ - { \ - mxc_gpio_regs_t *gpio = MXC_GPIO_GET_GPIO(gpiobase); \ - uint32_t mis = gpio->int_stat; \ - gpio_interrupt(gpiobase, mis); \ - gpio->int_clr = mis; \ - } - -GPIO_IRQ_FUNC(__gpio_0_interrupt, PORT_0); -#undef GPIO_IRQ_FUNC -DECLARE_IRQ(EC_GPIO0_IRQn, __gpio_0_interrupt, 1); |