blob: 8641676266fe03a046e7e407c1fbda0d0956a6fc [file] [log] [blame]
/*
* Copyright (c) 2020 Nuvoton Technology Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/dt-bindings/pinctrl/npcx-pinctrl.h>
#include <zephyr/kernel.h>
#include <soc.h>
#include "soc_gpio.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(pimux_npcx, LOG_LEVEL_ERR);
/* Driver config */
struct npcx_scfg_config {
/* scfg device base address */
uintptr_t base_scfg;
uintptr_t base_glue;
};
/*
* Get io list which default functionality are not IOs. Then switch them to
* GPIO in pin-mux init function.
*
* def-io-conf-list {
* pinmux = <&alt0_gpio_no_spip
* &alt0_gpio_no_fpip
* ...>;
* };
*/
#define NPCX_NO_GPIO_ALT_ITEM(node_id, prop, idx) { \
.group = DT_PHA(DT_PROP_BY_IDX(node_id, prop, idx), alts, group), \
.bit = DT_PHA(DT_PROP_BY_IDX(node_id, prop, idx), alts, bit), \
.inverted = DT_PHA(DT_PROP_BY_IDX(node_id, prop, idx), alts, inv), \
},
static const struct npcx_alt def_alts[] = {
DT_FOREACH_PROP_ELEM(DT_INST(0, nuvoton_npcx_pinctrl_def), pinmux,
NPCX_NO_GPIO_ALT_ITEM)
};
static const struct npcx_scfg_config npcx_scfg_cfg = {
.base_scfg = DT_REG_ADDR_BY_NAME(DT_NODELABEL(scfg), scfg),
.base_glue = DT_REG_ADDR_BY_NAME(DT_NODELABEL(scfg), glue),
};
/* Driver convenience defines */
#define HAL_SFCG_INST() (struct scfg_reg *)(npcx_scfg_cfg.base_scfg)
#define HAL_GLUE_INST() (struct glue_reg *)(npcx_scfg_cfg.base_glue)
/* Pin-control local functions */
static void npcx_pinctrl_alt_sel(const struct npcx_alt *alt, int alt_func)
{
const uint32_t scfg_base = npcx_scfg_cfg.base_scfg;
uint8_t alt_mask = BIT(alt->bit);
/*
* alt_fun == 0 means select GPIO, otherwise Alternate Func.
* inverted == 0:
* Set devalt bit to select Alternate Func.
* inverted == 1:
* Clear devalt bit to select Alternate Func.
*/
if (!!alt_func != !!alt->inverted) {
NPCX_DEVALT(scfg_base, alt->group) |= alt_mask;
} else {
NPCX_DEVALT(scfg_base, alt->group) &= ~alt_mask;
}
}
/* Platform specific pin-control functions */
void npcx_lvol_set_detect_level(int lvol_ctrl, int lvol_bit, bool enable)
{
const uintptr_t scfg_base = npcx_scfg_cfg.base_scfg;
if (enable) {
NPCX_LV_GPIO_CTL(scfg_base, lvol_ctrl) |= BIT(lvol_bit);
} else {
NPCX_LV_GPIO_CTL(scfg_base, lvol_ctrl) &= ~BIT(lvol_bit);
}
}
bool npcx_lvol_get_detect_level(int lvol_ctrl, int lvol_bit)
{
const uintptr_t scfg_base = npcx_scfg_cfg.base_scfg;
return NPCX_LV_GPIO_CTL(scfg_base, lvol_ctrl) & BIT(lvol_bit);
}
void npcx_pinctrl_i2c_port_sel(int controller, int port)
{
struct glue_reg *const inst_glue = HAL_GLUE_INST();
if (port != 0) {
inst_glue->SMB_SEL |= BIT(controller);
} else {
inst_glue->SMB_SEL &= ~BIT(controller);
}
}
int npcx_pinctrl_flash_write_protect_set(void)
{
struct scfg_reg *inst_scfg = HAL_SFCG_INST();
inst_scfg->DEV_CTL4 |= BIT(NPCX_DEV_CTL4_WP_IF);
if (!IS_BIT_SET(inst_scfg->DEV_CTL4, NPCX_DEV_CTL4_WP_IF)) {
return -EIO;
}
return 0;
}
bool npcx_pinctrl_flash_write_protect_is_set(void)
{
struct scfg_reg *inst_scfg = HAL_SFCG_INST();
return IS_BIT_SET(inst_scfg->DEV_CTL4, NPCX_DEV_CTL4_WP_IF);
}
void npcx_host_interface_sel(enum npcx_hif_type hif_type)
{
struct scfg_reg *inst_scfg = HAL_SFCG_INST();
SET_FIELD(inst_scfg->DEVCNT, NPCX_DEVCNT_HIF_TYP_SEL_FIELD, hif_type);
}
/* Pin-control driver registration */
static int npcx_scfg_init(const struct device *dev)
{
struct scfg_reg *inst_scfg = HAL_SFCG_INST();
/*
* Set bit 7 of DEVCNT again for npcx7 series. Please see Errata
* for more information. It will be fixed in next chip.
*/
if (IS_ENABLED(CONFIG_SOC_SERIES_NPCX7)) {
inst_scfg->DEVCNT |= BIT(7);
}
/* Change all pads whose default functionality isn't IO to GPIO */
for (int i = 0; i < ARRAY_SIZE(def_alts); i++) {
npcx_pinctrl_alt_sel(&def_alts[i], 0);
}
return 0;
}
SYS_INIT(npcx_scfg_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);