/*
* Copyright (c) 2016 Linaro Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <counter.h>
#include <device.h>
#include <errno.h>
#include <init.h>
#include <soc.h>
#include <clock_control/arm_clock_control.h>
#include "timer_cmsdk_apb.h"
typedef void (*timer_config_func_t)(struct device *dev);
static counter_callback_t user_cb;
#define TIMER_MAX_RELOAD 0xFFFFFFFF
enum timer_status_t {
TIMER_DISABLED = 0,
TIMER_ENABLED,
};
struct timer_tmr_cmsdk_apb_cfg {
volatile struct timer_cmsdk_apb *timer;
timer_config_func_t timer_config_func;
/* Timer Clock control in Active State */
const struct arm_clock_control_t timer_cc_as;
/* Timer Clock control in Sleep State */
const struct arm_clock_control_t timer_cc_ss;
/* Timer Clock control in Deep Sleep State */
const struct arm_clock_control_t timer_cc_dss;
};
struct timer_tmr_cmsdk_apb_dev_data {
u32_t load;
enum timer_status_t status;
};
static int timer_tmr_cmsdk_apb_start(struct device *dev)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
struct timer_tmr_cmsdk_apb_dev_data *data = dev->driver_data;
/* Set the timer to Max reload */
cfg->timer->reload = TIMER_MAX_RELOAD;
/* Enable the timer */
cfg->timer->ctrl = TIMER_CTRL_EN;
/* Update the status */
data->status = TIMER_ENABLED;
return 0;
}
static int timer_tmr_cmsdk_apb_stop(struct device *dev)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
struct timer_tmr_cmsdk_apb_dev_data *data = dev->driver_data;
/* Disable the timer */
cfg->timer->ctrl = 0x0;
/* Update the status */
data->status = TIMER_DISABLED;
return 0;
}
static u32_t timer_tmr_cmsdk_apb_read(struct device *dev)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
struct timer_tmr_cmsdk_apb_dev_data *data = dev->driver_data;
/* Return Counter Value */
u32_t value = 0;
value = data->load - cfg->timer->value;
return value;
}
static int timer_tmr_cmsdk_apb_set_alarm(struct device *dev,
counter_callback_t callback,
u32_t count, void *user_data)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
struct timer_tmr_cmsdk_apb_dev_data *data = dev->driver_data;
if (data->status == TIMER_DISABLED) {
return -ENOTSUP;
}
/* Set callback */
user_cb = callback;
/* Store the reload value */
data->load = count;
/* Set value register to count */
cfg->timer->value = count;
/* Set the timer reload to count */
cfg->timer->reload = count;
/* Enable IRQ */
cfg->timer->ctrl |= TIMER_CTRL_IRQ_EN;
return 0;
}
static u32_t timer_tmr_cmsdk_apb_get_pending_int(struct device *dev)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
return cfg->timer->intstatus;
}
static const struct counter_driver_api timer_tmr_cmsdk_apb_api = {
.start = timer_tmr_cmsdk_apb_start,
.stop = timer_tmr_cmsdk_apb_stop,
.read = timer_tmr_cmsdk_apb_read,
.set_alarm = timer_tmr_cmsdk_apb_set_alarm,
.get_pending_int = timer_tmr_cmsdk_apb_get_pending_int,
};
static void timer_tmr_cmsdk_apb_isr(void *arg)
{
struct device *dev = (struct device *)arg;
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
cfg->timer->intclear = TIMER_CTRL_INT_CLEAR;
if (user_cb) {
/* user_data paramenter is not used by this driver */
(*user_cb)(dev, NULL);
}
}
static int timer_tmr_cmsdk_apb_init(struct device *dev)
{
const struct timer_tmr_cmsdk_apb_cfg * const cfg =
dev->config->config_info;
#ifdef CONFIG_CLOCK_CONTROL
/* Enable clock for subsystem */
struct device *clk =
device_get_binding(CONFIG_ARM_CLOCK_CONTROL_DEV_NAME);
#ifdef CONFIG_SOC_SERIES_BEETLE
clock_control_on(clk, (clock_control_subsys_t *) &cfg->timer_cc_as);
clock_control_on(clk, (clock_control_subsys_t *) &cfg->timer_cc_ss);
clock_control_on(clk, (clock_control_subsys_t *) &cfg->timer_cc_dss);
#endif /* CONFIG_SOC_SERIES_BEETLE */
#endif /* CONFIG_CLOCK_CONTROL */
cfg->timer_config_func(dev);
return 0;
}
/* TIMER 0 */
#ifdef CONFIG_TIMER_TMR_CMSDK_APB_0
static void timer_cmsdk_apb_config_0(struct device *dev);
static const struct timer_tmr_cmsdk_apb_cfg timer_tmr_cmsdk_apb_cfg_0 = {
.timer = ((volatile struct timer_cmsdk_apb *)CMSDK_APB_TIMER0),
.timer_config_func = timer_cmsdk_apb_config_0,
.timer_cc_as = {.bus = CMSDK_APB, .state = SOC_ACTIVE,
.device = CMSDK_APB_TIMER0,},
.timer_cc_ss = {.bus = CMSDK_APB, .state = SOC_SLEEP,
.device = CMSDK_APB_TIMER0,},
.timer_cc_dss = {.bus = CMSDK_APB, .state = SOC_DEEPSLEEP,
.device = CMSDK_APB_TIMER0,},
};
static struct timer_tmr_cmsdk_apb_dev_data timer_tmr_cmsdk_apb_dev_data_0 = {
.load = TIMER_MAX_RELOAD,
.status = TIMER_DISABLED,
};
DEVICE_AND_API_INIT(timer_tmr_cmsdk_apb_0,
CONFIG_TIMER_TMR_CMSDK_APB_0_DEV_NAME,
timer_tmr_cmsdk_apb_init, &timer_tmr_cmsdk_apb_dev_data_0,
&timer_tmr_cmsdk_apb_cfg_0, POST_KERNEL,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&timer_tmr_cmsdk_apb_api);
static void timer_cmsdk_apb_config_0(struct device *dev)
{
IRQ_CONNECT(CMSDK_APB_TIMER_0_IRQ, CONFIG_TIMER_TMR_CMSDK_APB_0_IRQ_PRI,
timer_tmr_cmsdk_apb_isr,
DEVICE_GET(timer_tmr_cmsdk_apb_0), 0);
irq_enable(CMSDK_APB_TIMER_0_IRQ);
}
#endif /* CONFIG_TIMER_TMR_CMSDK_APB_0 */
/* TIMER 1 */
#ifdef CONFIG_TIMER_TMR_CMSDK_APB_1
static void timer_cmsdk_apb_config_1(struct device *dev);
static const struct timer_tmr_cmsdk_apb_cfg timer_tmr_cmsdk_apb_cfg_1 = {
.timer = ((volatile struct timer_cmsdk_apb *)CMSDK_APB_TIMER1),
.timer_config_func = timer_cmsdk_apb_config_1,
.timer_cc_as = {.bus = CMSDK_APB, .state = SOC_ACTIVE,
.device = CMSDK_APB_TIMER1,},
.timer_cc_ss = {.bus = CMSDK_APB, .state = SOC_SLEEP,
.device = CMSDK_APB_TIMER1,},
.timer_cc_dss = {.bus = CMSDK_APB, .state = SOC_DEEPSLEEP,
.device = CMSDK_APB_TIMER1,},
};
static struct timer_tmr_cmsdk_apb_dev_data timer_tmr_cmsdk_apb_dev_data_1 = {
.load = TIMER_MAX_RELOAD,
.status = TIMER_DISABLED,
};
DEVICE_AND_API_INIT(timer_tmr_cmsdk_apb_1,
CONFIG_TIMER_TMR_CMSDK_APB_1_DEV_NAME,
timer_tmr_cmsdk_apb_init, &timer_tmr_cmsdk_apb_dev_data_1,
&timer_tmr_cmsdk_apb_cfg_1, POST_KERNEL,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&timer_tmr_cmsdk_apb_api);
static void timer_cmsdk_apb_config_1(struct device *dev)
{
IRQ_CONNECT(CMSDK_APB_TIMER_1_IRQ, CONFIG_TIMER_TMR_CMSDK_APB_1_IRQ_PRI,
timer_tmr_cmsdk_apb_isr,
DEVICE_GET(timer_tmr_cmsdk_apb_0), 0);
irq_enable(CMSDK_APB_TIMER_1_IRQ);
}
#endif /* CONFIG_TIMER_TMR_CMSDK_APB_1 */