diff options
Diffstat (limited to 'zephyr/drivers/cros_kb_raw/cros_kb_raw_npcx.c')
| -rw-r--r-- | zephyr/drivers/cros_kb_raw/cros_kb_raw_npcx.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/zephyr/drivers/cros_kb_raw/cros_kb_raw_npcx.c b/zephyr/drivers/cros_kb_raw/cros_kb_raw_npcx.c deleted file mode 100644 index 00965b74ca..0000000000 --- a/zephyr/drivers/cros_kb_raw/cros_kb_raw_npcx.c +++ /dev/null @@ -1,241 +0,0 @@ -/* Copyright 2021 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. - */ - -#define DT_DRV_COMPAT nuvoton_npcx_cros_kb_raw - -#include <assert.h> -#include <dt-bindings/clock/npcx_clock.h> -#include <drivers/cros_kb_raw.h> -#include <drivers/clock_control.h> -#include <drivers/gpio.h> -#include <kernel.h> -#include <soc.h> -#include <soc/nuvoton_npcx/reg_def_cros.h> - -#include "ec_tasks.h" -#include "keyboard_raw.h" -#include "soc_miwu.h" -#include "task.h" - -#include <logging/log.h> -LOG_MODULE_REGISTER(cros_kb_raw, LOG_LEVEL_ERR); - -#define NPCX_MAX_KEY_COLS 18 /* Maximum rows of keyboard matrix */ -#define NPCX_MAX_KEY_ROWS 8 /* Maximum columns of keyboard matrix */ -#define NPCX_KB_ROW_MASK (BIT(NPCX_MAX_KEY_ROWS) - 1) - -/* Device config */ -struct cros_kb_raw_npcx_config { - /* keyboard scan controller base address */ - uintptr_t base; - /* clock configuration */ - struct npcx_clk_cfg clk_cfg; - /* pinmux configuration */ - const uint8_t alts_size; - const struct npcx_alt *alts_list; - /* Keyboard scan input (KSI) wake-up irq */ - int irq; - /* Size of keyboard inputs-wui mapping array */ - int wui_size; - /* Mapping table between keyboard inputs and wui */ - struct npcx_wui wui_maps[]; -}; - -/* Driver convenience defines */ -#define DRV_CONFIG(dev) ((const struct cros_kb_raw_npcx_config *)(dev)->config) -#define HAL_INSTANCE(dev) (struct kbs_reg *)(DRV_CONFIG(dev)->base) - -/* Keyboard Scan local functions */ -static struct miwu_dev_callback ksi_callback[NPCX_MAX_KEY_ROWS]; - -static void kb_raw_npcx_init_ksi_wui_callback( - const struct device *dev, struct miwu_dev_callback *callback, - const struct npcx_wui *wui, miwu_dev_callback_handler_t handler) -{ - /* KSI signal which has no wake-up input source */ - if (wui->table == NPCX_MIWU_TABLE_NONE) - return; - - /* Install callback function */ - npcx_miwu_init_dev_callback(callback, wui, handler, dev); - npcx_miwu_manage_dev_callback(callback, 1); - - /* Configure MIWU setting and enable its interrupt */ - npcx_miwu_interrupt_configure(wui, NPCX_MIWU_MODE_EDGE, - NPCX_MIWU_TRIG_BOTH); - npcx_miwu_irq_enable(wui); -} - -static int kb_raw_npcx_init(const struct device *dev) -{ - const struct cros_kb_raw_npcx_config *const config = DRV_CONFIG(dev); - const struct device *clk_dev = DEVICE_DT_GET(NPCX_CLK_CTRL_NODE); - int ret; - - /* Turn on device clock first and get source clock freq. */ - ret = clock_control_on(clk_dev, - (clock_control_subsys_t *)&config->clk_cfg); - if (ret < 0) { - LOG_ERR("Turn on KSCAN clock fail %d", ret); - return ret; - } - - return 0; -} - -/* Cros ec keyboard raw api functions */ -static int cros_kb_raw_npcx_enable_interrupt(const struct device *dev, - int enable) -{ - const struct cros_kb_raw_npcx_config *const config = DRV_CONFIG(dev); - - if (enable) - irq_enable(config->irq); - else - irq_disable(config->irq); - - return 0; -} - -static int cros_kb_raw_npcx_read_row(const struct device *dev) -{ - struct kbs_reg *const inst = HAL_INSTANCE(dev); - int val; - - val = inst->KBSIN; - LOG_DBG("rows raw %02x", val); - - /* 1 means key pressed, otherwise means key released. */ - return (~val & NPCX_KB_ROW_MASK); -} - -static int cros_kb_raw_npcx_drive_column(const struct device *dev, int col) -{ - struct kbs_reg *const inst = HAL_INSTANCE(dev); - - /* - * Nuvoton 'Keyboard Scan' module supports 18x8 matrix - * It also support automatic scan functionality. - */ - uint32_t mask, col_out; - - /* Add support for CONFIG_KEYBOARD_KSO_BASE shifting */ - col_out = col + CONFIG_KEYBOARD_KSO_BASE; - - /* Drive all lines to high. ie. Key detection is disabled. */ - if (col == KEYBOARD_COLUMN_NONE) { - mask = ~0; - if (IS_ENABLED(CONFIG_PLATFORM_EC_KEYBOARD_COL2_INVERTED)) { - gpio_set_level(GPIO_KBD_KSO2, 0); - } - } - /* Drive all lines to low for detection any key press */ - else if (col == KEYBOARD_COLUMN_ALL) { - mask = ~(BIT(keyboard_cols) - 1); - if (IS_ENABLED(CONFIG_PLATFORM_EC_KEYBOARD_COL2_INVERTED)) { - gpio_set_level(GPIO_KBD_KSO2, 1); - } - } - /* Drive one line to low for determining which key's state changed. */ - else { - if (IS_ENABLED(CONFIG_PLATFORM_EC_KEYBOARD_COL2_INVERTED)) { - if (col == 2) - gpio_set_level(GPIO_KBD_KSO2, 1); - else - gpio_set_level(GPIO_KBD_KSO2, 0); - } - mask = ~BIT(col_out); - } - - /* Set KBSOUT */ - inst->KBSOUT0 = (mask & 0xFFFF); - inst->KBSOUT1 = ((mask >> 16) & 0x03); - - return 0; -} - -static void cros_kb_raw_npcx_ksi_isr(const struct device *dev, - struct npcx_wui *wui) -{ - ARG_UNUSED(dev); - ARG_UNUSED(wui); - - LOG_DBG("%s: KSI%d is changed", __func__, wui->bit); - /* Wake-up keyboard scan task */ - task_wake(TASK_ID_KEYSCAN); -} - -static int cros_kb_raw_npcx_init(const struct device *dev) -{ - const struct cros_kb_raw_npcx_config *const config = DRV_CONFIG(dev); - struct kbs_reg *const inst = HAL_INSTANCE(dev); - - /* Pull-up KBSIN0-7 internally */ - inst->KBSINPU = 0xFF; - - /* - * Keyboard Scan Control Register - * - * [6:7] - KBHDRV KBSOUTn signals output buffers are open-drain. - * [3] - KBSINC Auto-increment of Buffer Data register is disabled - * [2] - KBSIEN Interrupt of Auto-Scan is disabled - * [1] - KBSMODE Key detection mechanism is implemented by firmware - * [0] - START Write 0 to this field is not affected - */ - inst->KBSCTL = 0x00; - - /* - * Select quasi-bidirectional buffers for KSO pins. It reduces the - * low-to-high transition time. This feature only supports in npcx7. - */ - if (IS_ENABLED(CONFIG_CROS_KB_RAW_NPCX_KSO_HIGH_DRIVE)) { - SET_FIELD(inst->KBSCTL, NPCX_KBSCTL_KBHDRV_FIELD, 0x01); - } - - /* Configure pin-mux for kscan device */ - npcx_pinctrl_mux_configure(config->alts_list, config->alts_size, 1); - - /* Drive all column lines to low for detection any key press */ - cros_kb_raw_npcx_drive_column(dev, KEYBOARD_COLUMN_ALL); - - /* Configure wake-up input and callback for keyboard input signal */ - for (int i = 0; i < ARRAY_SIZE(ksi_callback); i++) - kb_raw_npcx_init_ksi_wui_callback(dev, &ksi_callback[i], - &config->wui_maps[i], - cros_kb_raw_npcx_ksi_isr); - - return 0; -} - -static const struct cros_kb_raw_driver_api cros_kb_raw_npcx_driver_api = { - .init = cros_kb_raw_npcx_init, - .drive_colum = cros_kb_raw_npcx_drive_column, - .read_rows = cros_kb_raw_npcx_read_row, - .enable_interrupt = cros_kb_raw_npcx_enable_interrupt, -}; - -static const struct npcx_alt cros_kb_raw_alts[] = NPCX_DT_ALT_ITEMS_LIST(0); - -static const struct cros_kb_raw_npcx_config cros_kb_raw_cfg = { - .base = DT_INST_REG_ADDR(0), - .alts_size = ARRAY_SIZE(cros_kb_raw_alts), - .alts_list = cros_kb_raw_alts, - .clk_cfg = NPCX_DT_CLK_CFG_ITEM(0), - .irq = DT_INST_IRQN(0), - .wui_size = NPCX_DT_WUI_ITEMS_LEN(0), - .wui_maps = NPCX_DT_WUI_ITEMS_LIST(0), -}; - -/* Verify there's exactly 1 enabled cros,kb-raw-npcx node. */ -BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 1); -DEVICE_DT_INST_DEFINE(0, kb_raw_npcx_init, NULL, NULL, &cros_kb_raw_cfg, - PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, - &cros_kb_raw_npcx_driver_api); - -/* KBS register structure check */ -NPCX_REG_SIZE_CHECK(kbs_reg, 0x010); -NPCX_REG_OFFSET_CHECK(kbs_reg, KBSIN, 0x004); -NPCX_REG_OFFSET_CHECK(kbs_reg, KBSOUT0, 0x006); -NPCX_REG_OFFSET_CHECK(kbs_reg, KBS_BUF_INDX, 0x00a); |