123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2021 Nuvoton Technology Corporation.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT nuvoton_npcx_ps2_channel
|
|
|
|
/**
|
|
* @file
|
|
* @brief Nuvoton NPCX PS/2 driver
|
|
*
|
|
* This file contains the driver of PS/2 buses (channels) which provides the
|
|
* connection between Zephyr PS/2 API functions and NPCX PS/2 controller driver
|
|
* to support PS/2 transactions.
|
|
*
|
|
*/
|
|
|
|
#include <drivers/clock_control.h>
|
|
#include <drivers/ps2.h>
|
|
#include <soc.h>
|
|
|
|
#include <logging/log.h>
|
|
LOG_MODULE_REGISTER(ps2_npcx_channel, CONFIG_PS2_LOG_LEVEL);
|
|
|
|
#include "ps2_npcx_controller.h"
|
|
|
|
/* Device config */
|
|
struct ps2_npcx_ch_config {
|
|
/* pinmux configuration */
|
|
const uint8_t alts_size;
|
|
const struct npcx_alt *alts_list;
|
|
/* Indicate the channel's number of the PS/2 channel device */
|
|
uint8_t channel_id;
|
|
const struct device *ps2_ctrl;
|
|
};
|
|
|
|
/* PS/2 api functions */
|
|
static int ps2_npcx_ch_configure(const struct device *dev,
|
|
ps2_callback_t callback_isr)
|
|
{
|
|
const struct ps2_npcx_ch_config *const config = dev->config;
|
|
int ret;
|
|
|
|
ret = ps2_npcx_ctrl_configure(config->ps2_ctrl, config->channel_id,
|
|
callback_isr);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
return ps2_npcx_ctrl_enable_interface(config->ps2_ctrl,
|
|
config->channel_id, 1);
|
|
}
|
|
|
|
static int ps2_npcx_ch_write(const struct device *dev, uint8_t value)
|
|
{
|
|
const struct ps2_npcx_ch_config *const config = dev->config;
|
|
|
|
return ps2_npcx_ctrl_write(config->ps2_ctrl, config->channel_id, value);
|
|
}
|
|
|
|
static int ps2_npcx_ch_enable_interface(const struct device *dev)
|
|
{
|
|
const struct ps2_npcx_ch_config *const config = dev->config;
|
|
|
|
return ps2_npcx_ctrl_enable_interface(config->ps2_ctrl,
|
|
config->channel_id, 1);
|
|
}
|
|
|
|
static int ps2_npcx_ch_inhibit_interface(const struct device *dev)
|
|
{
|
|
const struct ps2_npcx_ch_config *const config = dev->config;
|
|
|
|
return ps2_npcx_ctrl_enable_interface(config->ps2_ctrl,
|
|
config->channel_id, 0);
|
|
}
|
|
|
|
/* PS/2 driver registration */
|
|
static int ps2_npcx_channel_init(const struct device *dev)
|
|
{
|
|
const struct ps2_npcx_ch_config *const config = dev->config;
|
|
|
|
if (!device_is_ready(config->ps2_ctrl)) {
|
|
LOG_ERR("%s device not ready", config->ps2_ctrl->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Configure pin-mux for PS/2 device */
|
|
npcx_pinctrl_mux_configure(config->alts_list, config->alts_size, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ps2_driver_api ps2_channel_npcx_driver_api = {
|
|
.config = ps2_npcx_ch_configure,
|
|
.read = NULL,
|
|
.write = ps2_npcx_ch_write,
|
|
.disable_callback = ps2_npcx_ch_inhibit_interface,
|
|
.enable_callback = ps2_npcx_ch_enable_interface,
|
|
};
|
|
|
|
/* PS/2 channel initialization macro functions */
|
|
#define NPCX_PS2_CHANNEL_INIT(inst) \
|
|
\
|
|
static const struct npcx_alt ps2_channel_alts##inst[] = \
|
|
NPCX_DT_ALT_ITEMS_LIST(inst); \
|
|
\
|
|
static const struct ps2_npcx_ch_config ps2_npcx_ch_cfg_##inst = { \
|
|
.channel_id = DT_INST_PROP(inst, channel), \
|
|
.alts_size = ARRAY_SIZE(ps2_channel_alts##inst), \
|
|
.alts_list = ps2_channel_alts##inst, \
|
|
.ps2_ctrl = DEVICE_DT_GET(DT_INST_PARENT(inst)), \
|
|
}; \
|
|
\
|
|
DEVICE_DT_INST_DEFINE(inst, ps2_npcx_channel_init, NULL, NULL, \
|
|
&ps2_npcx_ch_cfg_##inst, POST_KERNEL, \
|
|
CONFIG_PS2_CHANNEL_INIT_PRIORITY, \
|
|
&ps2_channel_npcx_driver_api);
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(NPCX_PS2_CHANNEL_INIT)
|
|
|
|
/* PS/2 channel driver must be initialized after PS/2 controller driver */
|
|
BUILD_ASSERT(CONFIG_PS2_CHANNEL_INIT_PRIORITY > CONFIG_PS2_INIT_PRIORITY);
|