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host_subs_npcx.c
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/*
* Copyright (c) 2020 Nuvoton Technology Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nuvoton_npcx_host_sub
/**
* @file
* @brief Nuvoton NPCX host sub modules driver
*
* This file contains the drivers of NPCX Host Sub-Modules that serve as an
* interface between the Host and Core domains. Please refer the block diagram.
*
* +------------+
* | Serial |---> TXD
* +<--->| Port |<--- RXD
* | | |<--> ...
* | +------------+
* | +------------+ |
* +------------+ |<--->| KBC & PM |<--->|
* eSPI_CLK --->| eSPI Bus | | | Channels | |
* eSPI_RST --->| Controller | | +------------+ |
* eSPI_IO3-0 <-->| |<-->| +------------+ |
* eSPI_CS --->| (eSPI mode)| | | Shared | |
* eSPI_ALERT <-->| | |<--->| Memory |<--->|
* +------------+ | +------------+ |
* | +------------+ |
* |<--->| MSWC |<--->|
* | +------------+ |
* | +------------+ |
* | | Core | |
* |<--->| to Host |<--->|
* | | Access | |
* | +------------+ |
* HMIB | Core Bus
* (Host Modules Internal Bus) +------------
*
*
* For most of them, the Host can configure these modules via eSPI(Peripheral
* Channel)/LPC by accessing 'Configuration and Control register Set' which IO
* base address is 0x4E as default. (The table below illustrates structure of
* 'Configuration and Control Register Set') And the interrupts in core domain
* help handling any events from host side.
*
* Index | Configuration and Control Register Set
* --------|--------------------------------------------------+ Bank Select
* 07h | Logical Device Number Register (LDN) |---------+
* --------|--------------------------------------------------- |
* 20-2Fh | SuperI/O Configuration Registers | |
* ------------------------------------------------------------ |
* --------|---------------------------------------------------_ |
* 30h | Logical Device Control Register | |_ |
* --------|--------------------------------------------------- | |_ |
* 60-63h | I/O Space Configuration Registers | | | | |
* --------|--------------------------------------------------- | | | |
* 70-71h | Interrupt Configuration Registers | | | | |
* --------|--------------------------------------------------- | | | |
* 73-74h | DMA Configuration Registers (No support in NPCX) | | | | |
* --------|--------------------------------------------------- | | |<--+
* F0-FFh | Special Logical Device Configuration Registers | | | |
* --------|--------------------------------------------------- | | |
* |--------------------------------------------------- | |
* |--------------------------------------------------- |
* |---------------------------------------------------
*
*
* This driver introduces six host sub-modules. It includes:
*
* 1. Keyboard and Mouse Controller (KBC) interface.
* ● Intel 8051SL-compatible Host interface
* — 8042 KBD standard interface (ports 60h, 64h)
* — Legacy IRQ: IRQ1 (KBD) and IRQ12 (mouse) support
* ● Configured by two logical devices: Keyboard and Mouse (LDN 0x06/0x05)
*
* 2. Power Management (PM) channels.
* ● PM channel registers
* — Command/Status register
* — Data register
* channel 1: legacy 62h, 66h; channel 2: legacy 68h, 6Ch;
* channel 3: legacy 6Ah, 6Eh; channel 4: legacy 6Bh, 6Fh;
* ● PM interrupt using:
* — Serial IRQ
* — SMI
* — EC_SCI
* ● Configured by four logical devices: PM1/2/3/4 (LDN 0x11/0x12/0x17/0x1E)
*
* 3. Shared Memory mechanism (SHM).
* This module allows sharing of the on-chip RAM by both Core and the Host.
* It also supports the following features:
* ● Four Core/Host communication windows for direct RAM access
* ● Eight Protection regions for each access window
* ● Host IRQ and SMI generation
* ● Port 80 debug support
* ● Configured by one logical device: SHM (LDN 0x0F)
*
* 4. Core Access to Host Modules (C2H).
* ● A interface to access module registers in host domain.
* It enables the Core to access the registers in host domain (i.e., Host
* Configuration, Serial Port, SHM, and MSWC), through HMIB.
*
* 5. Mobile System Wake-Up functions (MSWC).
* It detects and handles wake-up events from various sources in the Host
* modules and alerts the Core for better power consumption.
*
* 6. Serial Port (Legacy UART)
* It provides UART functionality by supporting serial data communication
* with a remote peripheral device or a modem.
*
* INCLUDE FILES: soc_host.h
*
*/
#include <assert.h>
#include <drivers/espi.h>
#include <drivers/gpio.h>
#include <drivers/clock_control.h>
#include <kernel.h>
#include <soc.h>
#include "espi_utils.h"
#include "soc_host.h"
#include "soc_espi.h"
#include "soc_miwu.h"
#include <logging/log.h>
LOG_MODULE_REGISTER(host_sub_npcx, LOG_LEVEL_ERR);
struct host_sub_npcx_config {
/* host module instances */
struct mswc_reg *const inst_mswc;
struct shm_reg *const inst_shm;
struct c2h_reg *const inst_c2h;
struct kbc_reg *const inst_kbc;
struct pmch_reg *const inst_pm_acpi;
struct pmch_reg *const inst_pm_hcmd;
/* clock configuration */
const uint8_t clks_size;
const struct npcx_clk_cfg *clks_list;
/* mapping table between host access signals and wake-up input */
struct npcx_wui host_acc_wui;
};
struct host_sub_npcx_data {
sys_slist_t *callbacks; /* pointer on the espi callback list */
uint8_t plt_rst_asserted; /* current PLT_RST# status */
uint8_t espi_rst_asserted; /* current ESPI_RST# status */
const struct device *host_bus_dev; /* device for eSPI/LPC bus */
};
static const struct npcx_clk_cfg host_dev_clk_cfg[] =
NPCX_DT_CLK_CFG_ITEMS_LIST(0);
struct host_sub_npcx_config host_sub_cfg = {
.inst_mswc = (struct mswc_reg *)DT_INST_REG_ADDR_BY_NAME(0, mswc),
.inst_shm = (struct shm_reg *)DT_INST_REG_ADDR_BY_NAME(0, shm),
.inst_c2h = (struct c2h_reg *)DT_INST_REG_ADDR_BY_NAME(0, c2h),
.inst_kbc = (struct kbc_reg *)DT_INST_REG_ADDR_BY_NAME(0, kbc),
.inst_pm_acpi = (struct pmch_reg *)DT_INST_REG_ADDR_BY_NAME(0, pm_acpi),
.inst_pm_hcmd = (struct pmch_reg *)DT_INST_REG_ADDR_BY_NAME(0, pm_hcmd),
.host_acc_wui = NPCX_DT_WUI_ITEM_BY_NAME(0, host_acc_wui),
.clks_size = ARRAY_SIZE(host_dev_clk_cfg),
.clks_list = host_dev_clk_cfg,
};
struct host_sub_npcx_data host_sub_data;
/* Application shouldn't touch these flags in KBC status register directly */
#define NPCX_KBC_STS_MASK (BIT(NPCX_HIKMST_IBF) | BIT(NPCX_HIKMST_OBF) \
| BIT(NPCX_HIKMST_A2))
/* IO base address of EC Logical Device Configuration */
#define NPCX_EC_CFG_IO_ADDR 0x4E
/* Timeout to wait for Core-to-Host transaction to be completed. */
#define NPCX_C2H_TRANSACTION_TIMEOUT_US 200
/* Logical Device Number Assignments */
#define EC_CFG_LDN_MOUSE 0x05
#define EC_CFG_LDN_KBC 0x06
#define EC_CFG_LDN_SHM 0x0F
#define EC_CFG_LDN_ACPI 0x11 /* PM Channel 1 */
#define EC_CFG_LDN_HCMD 0x12 /* PM Channel 2 */
/* Index of EC (4E/4F) Configuration Register */
#define EC_CFG_IDX_LDN 0x07
#define EC_CFG_IDX_CTRL 0x30
#define EC_CFG_IDX_CMD_IO_ADDR_H 0x60
#define EC_CFG_IDX_CMD_IO_ADDR_L 0x61
#define EC_CFG_IDX_DATA_IO_ADDR_H 0x62
#define EC_CFG_IDX_DATA_IO_ADDR_L 0x63
/* Index of Special Logical Device Configuration (Shared Memory Module) */
#define EC_CFG_IDX_SHM_CFG 0xF1
#define EC_CFG_IDX_SHM_WND1_ADDR_0 0xF4
#define EC_CFG_IDX_SHM_WND1_ADDR_1 0xF5
#define EC_CFG_IDX_SHM_WND1_ADDR_2 0xF6
#define EC_CFG_IDX_SHM_WND1_ADDR_3 0xF7
#define EC_CFG_IDX_SHM_WND2_ADDR_0 0xF8
#define EC_CFG_IDX_SHM_WND2_ADDR_1 0xF9
#define EC_CFG_IDX_SHM_WND2_ADDR_2 0xFA
#define EC_CFG_IDX_SHM_WND2_ADDR_3 0xFB
/* Host sub-device local inline functions */
static inline uint8_t host_shd_mem_wnd_size_sl(uint32_t size)
{
/* The minimum supported shared memory region size is 8 bytes */
if (size <= 8U) {
size = 8U;
}
/* The maximum supported shared memory region size is 4K bytes */
if (size >= 4096U) {
size = 4096U;
}
/*
* If window size is not a power-of-two, it is rounded-up to the next
* power-of-two value, and return value corresponds to RWINx_SIZE field.
*/
return (32 - __builtin_clz(size - 1U)) & 0xff;
}
/* Host KBC sub-device local functions */
#if defined(CONFIG_ESPI_PERIPHERAL_8042_KBC)
static void host_kbc_ibf_isr(void *arg)
{
ARG_UNUSED(arg);
struct kbc_reg *const inst_kbc = host_sub_cfg.inst_kbc;
struct espi_event evt = { ESPI_BUS_PERIPHERAL_NOTIFICATION,
ESPI_PERIPHERAL_8042_KBC, ESPI_PERIPHERAL_NODATA
};
/*
* The high byte contains information from the host, and the lower byte
* indicates if the host sent a command or data. 1 = Command.
*/
evt.evt_data = (inst_kbc->HIKMDI << NPCX_8042_DATA_POS) |
(IS_BIT_SET(inst_kbc->HIKMST, NPCX_HIKMST_A2) <<
NPCX_8042_TYPE_POS);
LOG_DBG("%s: kbc data 0x%02x", __func__, evt.evt_data);
espi_send_callbacks(host_sub_data.callbacks, host_sub_data.host_bus_dev,
evt);
}
static void host_kbc_obe_isr(void *arg)
{
ARG_UNUSED(arg);
struct kbc_reg *const inst_kbc = host_sub_cfg.inst_kbc;
/* Disable KBC OBE interrupt first */
inst_kbc->HICTRL &= ~BIT(NPCX_HICTRL_OBECIE);
LOG_DBG("%s: kbc status 0x%02x", __func__, inst_kbc->HIKMST);
/*
* TODO: Notify application that host already read out data. We might
* use E8042_SET_FLAG in espi_api_lpc_write_request() instead of setting
* status of HIKMST here directly.
*/
inst_kbc->HIKMST &= ~BIT(NPCX_HIKMST_ST1);
}
static void host_kbc_init(void)
{
struct kbc_reg *const inst_kbc = host_sub_cfg.inst_kbc;
/* Make sure the previous OBF and IRQ has been sent out. */
k_busy_wait(4);
/* Set FW_OBF to clear OBF flag in both STATUS and HIKMST to 0 */
inst_kbc->HICTRL |= BIT(NPCX_HICTRL_FW_OBF);
/* Ensure there is no OBF set in this period. */
k_busy_wait(4);
/*
* Init KBC with:
* 1. Enable Input Buffer Full (IBF) core interrupt for Keyboard/mouse.
* 2. Enable Output Buffer Full Mouse(OBFM) SIRQ 12.
* 3. Enable Output Buffer Full Keyboard (OBFK) SIRQ 1.
*/
inst_kbc->HICTRL = BIT(NPCX_HICTRL_IBFCIE) | BIT(NPCX_HICTRL_OBFMIE)
| BIT(NPCX_HICTRL_OBFKIE);
/* Configure SIRQ 1/12 type (level + high) */
inst_kbc->HIIRQC = 0x00;
}
#endif
/* Host ACPI sub-device local functions */
#if defined(CONFIG_ESPI_PERIPHERAL_HOST_IO)
static void host_acpi_process_input_data(uint8_t data)
{
struct pmch_reg *const inst_acpi = host_sub_cfg.inst_pm_acpi;
struct espi_event evt = {
.evt_type = ESPI_BUS_PERIPHERAL_NOTIFICATION,
.evt_details = ESPI_PERIPHERAL_HOST_IO,
.evt_data = ESPI_PERIPHERAL_NODATA
};
LOG_DBG("%s: acpi data 0x%02x", __func__, data);
/*
* The high byte contains information from the host, and the lower byte
* indicates if the host sent a command or data. 1 = Command.
*/
evt.evt_data = (data << NPCX_ACPI_DATA_POS) |
(IS_BIT_SET(inst_acpi->HIPMST, NPCX_HIPMST_CMD) <<
NPCX_ACPI_TYPE_POS);
espi_send_callbacks(host_sub_data.callbacks, host_sub_data.host_bus_dev,
evt);
}
static void host_acpi_init(void)
{
struct pmch_reg *const inst_acpi = host_sub_cfg.inst_pm_acpi;
/* Use SMI/SCI postive polarity by default */
inst_acpi->HIPMCTL &= ~BIT(NPCX_HIPMCTL_SCIPOL);
inst_acpi->HIPMIC &= ~BIT(NPCX_HIPMIC_SMIPOL);
/* Set SMIB/SCIB bits to make sure SMI#/SCI# are driven to high */
inst_acpi->HIPMIC |= BIT(NPCX_HIPMIC_SMIB) | BIT(NPCX_HIPMIC_SCIB);
/*
* Allow SMI#/SCI# generated from PM module.
* On eSPI bus, we suggest set VW value of SCI#/SMI# directly.
*/
inst_acpi->HIPMIE |= BIT(NPCX_HIPMIE_SCIE);
inst_acpi->HIPMIE |= BIT(NPCX_HIPMIE_SMIE);
/*
* Init ACPI PM channel (Host IO) with:
* 1. Enable Input-Buffer Full (IBF) core interrupt.
* 2. BIT 7 must be 1.
*/
inst_acpi->HIPMCTL |= BIT(7) | BIT(NPCX_HIPMCTL_IBFIE);
}
#endif
#if defined(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)
/* Host command argument and memory map buffers */
static uint8_t shm_host_cmd[CONFIG_ESPI_NPCX_PERIPHERAL_HOST_CMD_PARAM_SIZE]
__aligned(8);
/* Host command sub-device local functions */
static void host_hcmd_process_input_data(uint8_t data)
{
struct espi_event evt = { ESPI_BUS_PERIPHERAL_NOTIFICATION,
ESPI_PERIPHERAL_EC_HOST_CMD, ESPI_PERIPHERAL_NODATA
};
evt.evt_data = data;
LOG_DBG("%s: host cmd data 0x%02x", __func__, evt.evt_data);
espi_send_callbacks(host_sub_data.callbacks, host_sub_data.host_bus_dev,
evt);
}
static void host_hcmd_init(void)
{
struct pmch_reg *const inst_hcmd = host_sub_cfg.inst_pm_hcmd;
struct shm_reg *const inst_shm = host_sub_cfg.inst_shm;
uint32_t win_size = CONFIG_ESPI_NPCX_PERIPHERAL_HOST_CMD_PARAM_SIZE;
/* Don't stall SHM transactions */
inst_shm->SHM_CTL &= ~0x40;
/* Disable Window 1 protection */
inst_shm->WIN1_WR_PROT = 0;
inst_shm->WIN1_RD_PROT = 0;
/* Configure Win1 size for ec host command. */
SET_FIELD(inst_shm->WIN_SIZE, NPCX_WIN_SIZE_RWIN1_SIZE_FIELD,
host_shd_mem_wnd_size_sl(win_size));
inst_shm->WIN_BASE1 = (uint32_t)shm_host_cmd;
/*
* Clear processing flag before enabling host's interrupts in case
* it's set by the other command during sysjump.
*/
inst_hcmd->HIPMST &= ~BIT(NPCX_HIPMST_F0);
/*
* Init Host Command PM channel (Host IO) with:
* 1. Enable Input-Buffer Full (IBF) core interrupt.
* 2. BIT 7 must be 1.
*/
inst_hcmd->HIPMCTL |= BIT(7) | BIT(NPCX_HIPMCTL_IBFIE);
}
#endif
#if defined(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION)
/* Host command argument and memory map buffers */
static uint8_t shm_acpi_mmap[CONFIG_ESPI_NPCX_PERIPHERAL_ACPI_SHD_MEM_SIZE]
__aligned(8);
static void host_shared_mem_region_init(void)
{
struct shm_reg *const inst_shm = host_sub_cfg.inst_shm;
uint32_t win_size = CONFIG_ESPI_NPCX_PERIPHERAL_ACPI_SHD_MEM_SIZE;
/* Don't stall SHM transactions */
inst_shm->SHM_CTL &= ~0x40;
/* Disable Window 2 protection */
inst_shm->WIN2_WR_PROT = 0;
inst_shm->WIN2_RD_PROT = 0;
/* Configure Win2 size for ACPI shared mem region. */
SET_FIELD(inst_shm->WIN_SIZE, NPCX_WIN_SIZE_RWIN2_SIZE_FIELD,
host_shd_mem_wnd_size_sl(win_size));
inst_shm->WIN_BASE2 = (uint32_t)shm_acpi_mmap;
/* Enable write protect of Share memory window 2 */
inst_shm->WIN2_WR_PROT = 0xFF;
/*
* TODO: Initialize shm_acpi_mmap buffer for host command flags. We
* might use EACPI_GET_SHARED_MEMORY in espi_api_lpc_read_request()
* instead of setting host command flags here directly.
*/
}
#endif
#if defined(CONFIG_ESPI_PERIPHERAL_HOST_IO) || \
defined(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)
/* Host pm (host io) sub-module isr function for all channels such as ACPI. */
static void host_pmch_ibf_isr(void *arg)
{
ARG_UNUSED(arg);
struct pmch_reg *const inst_acpi = host_sub_cfg.inst_pm_acpi;
struct pmch_reg *const inst_hcmd = host_sub_cfg.inst_pm_hcmd;
uint8_t in_data;
/* Host put data on input buffer of ACPI channel */
if (IS_BIT_SET(inst_acpi->HIPMST, NPCX_HIPMST_IBF)) {
/* Set processing flag before reading command byte */
inst_acpi->HIPMST |= BIT(NPCX_HIPMST_F0);
/* Read out input data and clear IBF pending bit */
in_data = inst_acpi->HIPMDI;
#if defined(CONFIG_ESPI_PERIPHERAL_HOST_IO)
host_acpi_process_input_data(in_data);
#endif
}
/* Host put data on input buffer of HOSTCMD channel */
if (IS_BIT_SET(inst_hcmd->HIPMST, NPCX_HIPMST_IBF)) {
/* Set processing flag before reading command byte */
inst_hcmd->HIPMST |= BIT(NPCX_HIPMST_F0);
/* Read out input data and clear IBF pending bit */
in_data = inst_hcmd->HIPMDI;
#if defined(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)
host_hcmd_process_input_data(in_data);
#endif
}
}
#endif
/* Host port80 sub-device local functions */
#if defined(CONFIG_ESPI_PERIPHERAL_DEBUG_PORT_80)
static void host_port80_isr(void *arg)
{
ARG_UNUSED(arg);
struct shm_reg *const inst_shm = host_sub_cfg.inst_shm;
struct espi_event evt = { ESPI_BUS_PERIPHERAL_NOTIFICATION,
(ESPI_PERIPHERAL_INDEX_0 << 16) | ESPI_PERIPHERAL_DEBUG_PORT80,
ESPI_PERIPHERAL_NODATA
};
uint8_t status = inst_shm->DP80STS;
LOG_DBG("%s: p80 status 0x%02X", __func__, status);
/* Read out port80 data continuously if FIFO is not empty */
while (IS_BIT_SET(inst_shm->DP80STS, NPCX_DP80STS_FNE)) {
LOG_DBG("p80: %04x", inst_shm->DP80BUF);
evt.evt_data = inst_shm->DP80BUF;
espi_send_callbacks(host_sub_data.callbacks,
host_sub_data.host_bus_dev, evt);
}
/* If FIFO is overflow, show error msg */
if (IS_BIT_SET(status, NPCX_DP80STS_FOR)) {
inst_shm->DP80STS |= BIT(NPCX_DP80STS_FOR);
LOG_ERR("Port80 FIFO Overflow!");
}
/* Clear all pending bit indicates that FIFO was written by host */
inst_shm->DP80STS |= BIT(NPCX_DP80STS_FWR);
}
static void host_port80_init(void)
{
struct shm_reg *const inst_shm = host_sub_cfg.inst_shm;
/*
* Init PORT80 which includes:
* Enables a Core interrupt on every Host write to the FIFO,
* SYNC mode (It must be 1 in eSPI mode), Read Auto Advance mode, and
* Port80 module itself.
*/
inst_shm->DP80CTL = BIT(NPCX_DP80CTL_CIEN) | BIT(NPCX_DP80CTL_RAA)
| BIT(NPCX_DP80CTL_DP80EN) | BIT(NPCX_DP80CTL_SYNCEN);
}
#endif
#if defined(CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE)
static void host_cus_opcode_enable_interrupts(void)
{
/* Enable host KBC sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_8042_KBC)) {
irq_enable(DT_INST_IRQ_BY_NAME(0, kbc_ibf, irq));
irq_enable(DT_INST_IRQ_BY_NAME(0, kbc_obe, irq));
}
/* Enable host PM channel (Host IO) sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_HOST_IO) ||
IS_ENABLED(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)) {
irq_enable(DT_INST_IRQ_BY_NAME(0, pmch_ibf, irq));
}
/* Enable host Port80 sub-device interrupt installation */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_DEBUG_PORT_80)) {
irq_enable(DT_INST_IRQ_BY_NAME(0, p80_fifo, irq));
}
/* Enable host interface interrupts if its interface is eSPI */
if (IS_ENABLED(CONFIG_ESPI)) {
npcx_espi_enable_interrupts(host_sub_data.host_bus_dev);
}
}
static void host_cus_opcode_disable_interrupts(void)
{
/* Disable host KBC sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_8042_KBC)) {
irq_disable(DT_INST_IRQ_BY_NAME(0, kbc_ibf, irq));
irq_disable(DT_INST_IRQ_BY_NAME(0, kbc_obe, irq));
}
/* Disable host PM channel (Host IO) sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_HOST_IO) ||
IS_ENABLED(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)) {
irq_disable(DT_INST_IRQ_BY_NAME(0, pmch_ibf, irq));
}
/* Disable host Port80 sub-device interrupt installation */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_DEBUG_PORT_80)) {
irq_disable(DT_INST_IRQ_BY_NAME(0, p80_fifo, irq));
}
/* Disable host interface interrupts if its interface is eSPI */
if (IS_ENABLED(CONFIG_ESPI)) {
npcx_espi_disable_interrupts(host_sub_data.host_bus_dev);
}
}
#endif /* CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE */
#if defined(CONFIG_ESPI_PERIPHERAL_UART)
/* host uart pinmux configuration */
static const struct npcx_alt host_uart_alts[] =
NPCX_DT_IO_ALT_ITEMS_LIST(nuvoton_npcx_host_uart, 0);
/* Host UART sub-device local functions */
void host_uart_init(void)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
/* Configure pin-mux for serial port device */
npcx_pinctrl_mux_configure(host_uart_alts, ARRAY_SIZE(host_uart_alts),
1);
/* Make sure unlock host access of serial port */
inst_c2h->LKSIOHA &= ~BIT(NPCX_LKSIOHA_LKSPHA);
/* Clear 'Host lock violation occurred' bit of serial port initially */
inst_c2h->SIOLV |= BIT(NPCX_SIOLV_SPLV);
}
#endif
/* host core-to-host interface local functions */
static void host_c2h_wait_write_done(void)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
uint32_t elapsed_cycles;
uint32_t start_cycles = k_cycle_get_32();
uint32_t max_wait_cycles =
k_us_to_cyc_ceil32(NPCX_C2H_TRANSACTION_TIMEOUT_US);
while (IS_BIT_SET(inst_c2h->SIBCTRL, NPCX_SIBCTRL_CSWR)) {
elapsed_cycles = k_cycle_get_32() - start_cycles;
if (elapsed_cycles > max_wait_cycles) {
LOG_ERR("c2h write transaction expired!");
break;
}
}
}
static void host_c2h_wait_read_done(void)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
uint32_t elapsed_cycles;
uint32_t start_cycles = k_cycle_get_32();
uint32_t max_wait_cycles =
k_us_to_cyc_ceil32(NPCX_C2H_TRANSACTION_TIMEOUT_US);
while (IS_BIT_SET(inst_c2h->SIBCTRL, NPCX_SIBCTRL_CSRD)) {
elapsed_cycles = k_cycle_get_32() - start_cycles;
if (elapsed_cycles > max_wait_cycles) {
LOG_ERR("c2h read transaction expired!");
break;
}
}
}
void host_c2h_write_io_cfg_reg(uint8_t reg_index, uint8_t reg_data)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
/* Disable interrupts */
int key = irq_lock();
/* Lock host access EC configuration registers (0x4E/0x4F) */
inst_c2h->LKSIOHA |= BIT(NPCX_LKSIOHA_LKCFG);
/* Enable Core-to-Host access CFG module */
inst_c2h->CRSMAE |= BIT(NPCX_CRSMAE_CFGAE);
/* Verify core-to-host modules is not in progress */
host_c2h_wait_read_done();
host_c2h_wait_write_done();
/*
* Specifying the in-direct IO address which A0 = 0 indicates the index
* register is accessed. Then write index address directly and it starts
* a write transaction to host sub-module on LPC/eSPI bus.
*/
inst_c2h->IHIOA = NPCX_EC_CFG_IO_ADDR;
inst_c2h->IHD = reg_index;
host_c2h_wait_write_done();
/*
* Specifying the in-direct IO address which A0 = 1 indicates the data
* register is accessed. Then write data directly and it starts a write
* transaction to host sub-module on LPC/eSPI bus.
*/
inst_c2h->IHIOA = NPCX_EC_CFG_IO_ADDR + 1;
inst_c2h->IHD = reg_data;
host_c2h_wait_write_done();
/* Disable Core-to-Host access CFG module */
inst_c2h->CRSMAE &= ~BIT(NPCX_CRSMAE_CFGAE);
/* Unlock host access EC configuration registers (0x4E/0x4F) */
inst_c2h->LKSIOHA &= ~BIT(NPCX_LKSIOHA_LKCFG);
/* Enable interrupts */
irq_unlock(key);
}
uint8_t host_c2h_read_io_cfg_reg(uint8_t reg_index)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
uint8_t data_val;
/* Disable interrupts */
int key = irq_lock();
/* Lock host access EC configuration registers (0x4E/0x4F) */
inst_c2h->LKSIOHA |= BIT(NPCX_LKSIOHA_LKCFG);
/* Enable Core-to-Host access CFG module */
inst_c2h->CRSMAE |= BIT(NPCX_CRSMAE_CFGAE);
/* Verify core-to-host modules is not in progress */
host_c2h_wait_read_done();
host_c2h_wait_write_done();
/*
* Specifying the in-direct IO address which A0 = 0 indicates the index
* register is accessed. Then write index address directly and it starts
* a write transaction to host sub-module on LPC/eSPI bus.
*/
inst_c2h->IHIOA = NPCX_EC_CFG_IO_ADDR;
inst_c2h->IHD = reg_index;
host_c2h_wait_write_done();
/*
* Specifying the in-direct IO address which A0 = 1 indicates the data
* register is accessed. Then write CSRD bit in SIBCTRL to issue a read
* transaction to host sub-module on LPC/eSPI bus. Once it was done,
* read data out from IHD.
*/
inst_c2h->IHIOA = NPCX_EC_CFG_IO_ADDR + 1;
inst_c2h->SIBCTRL |= BIT(NPCX_SIBCTRL_CSRD);
host_c2h_wait_read_done();
data_val = inst_c2h->IHD;
/* Disable Core-to-Host access CFG module */
inst_c2h->CRSMAE &= ~BIT(NPCX_CRSMAE_CFGAE);
/* Unlock host access EC configuration registers (0x4E/0x4F) */
inst_c2h->LKSIOHA &= ~BIT(NPCX_LKSIOHA_LKCFG);
/* Enable interrupts */
irq_unlock(key);
return data_val;
}
/* Platform specific host sub modules functions */
int npcx_host_periph_read_request(enum lpc_peripheral_opcode op,
uint32_t *data)
{
if (op >= E8042_START_OPCODE && op <= E8042_MAX_OPCODE) {
struct kbc_reg *const inst_kbc = host_sub_cfg.inst_kbc;
/* Make sure kbc 8042 is on */
if (!IS_BIT_SET(inst_kbc->HICTRL, NPCX_HICTRL_OBFKIE) ||
!IS_BIT_SET(inst_kbc->HICTRL, NPCX_HICTRL_OBFMIE)) {
return -ENOTSUP;
}
switch (op) {
case E8042_OBF_HAS_CHAR:
/* EC has written data back to host. OBF is
* automatically cleared after host reads
* the data
*/
*data = IS_BIT_SET(inst_kbc->HIKMST, NPCX_HIKMST_OBF);
break;
case E8042_IBF_HAS_CHAR:
*data = IS_BIT_SET(inst_kbc->HIKMST, NPCX_HIKMST_IBF);
break;
case E8042_READ_KB_STS:
*data = inst_kbc->HIKMST;
break;
default:
return -EINVAL;
}
} else if (op >= EACPI_START_OPCODE && op <= EACPI_MAX_OPCODE) {
struct pmch_reg *const inst_acpi = host_sub_cfg.inst_pm_acpi;
/* Make sure pm channel for apci is on */
if (!IS_BIT_SET(inst_acpi->HIPMCTL, NPCX_HIPMCTL_IBFIE)) {
return -ENOTSUP;
}
switch (op) {
case EACPI_OBF_HAS_CHAR:
/* EC has written data back to host. OBF is
* automatically cleared after host reads
* the data
*/
*data = IS_BIT_SET(inst_acpi->HIPMST, NPCX_HIPMST_OBF);
break;
case EACPI_IBF_HAS_CHAR:
*data = IS_BIT_SET(inst_acpi->HIPMST, NPCX_HIPMST_IBF);
break;
case EACPI_READ_STS:
*data = inst_acpi->HIPMST;
break;
#if defined(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION)
case EACPI_GET_SHARED_MEMORY:
*data = (uint32_t)shm_acpi_mmap;
break;
#endif /* CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION */
default:
return -EINVAL;
}
}
#if defined(CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE)
else if (op >= ECUSTOM_START_OPCODE && op <= ECUSTOM_MAX_OPCODE) {
/* Other customized op codes */
switch (op) {
case ECUSTOM_HOST_CMD_GET_PARAM_MEMORY:
*data = (uint32_t)shm_host_cmd;
break;
default:
return -EINVAL;
}
}
#endif /* CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE */
else {
return -ENOTSUP;
}
return 0;
}
int npcx_host_periph_write_request(enum lpc_peripheral_opcode op,
uint32_t *data)
{
volatile uint32_t __attribute__((unused)) dummy;
struct kbc_reg *const inst_kbc = host_sub_cfg.inst_kbc;
if (op >= E8042_START_OPCODE && op <= E8042_MAX_OPCODE) {
/* Make sure kbc 8042 is on */
if (!IS_BIT_SET(inst_kbc->HICTRL, NPCX_HICTRL_OBFKIE) ||
!IS_BIT_SET(inst_kbc->HICTRL, NPCX_HICTRL_OBFMIE)) {
return -ENOTSUP;
}
if (data)
LOG_INF("%s: op 0x%x data %x", __func__, op, *data);
else
LOG_INF("%s: op 0x%x only", __func__, op);
switch (op) {
case E8042_WRITE_KB_CHAR:
inst_kbc->HIKDO = *data & 0xff;
/*
* Enable KBC OBE interrupt after putting data in
* keyboard data register.
*/
inst_kbc->HICTRL |= BIT(NPCX_HICTRL_OBECIE);
break;
case E8042_WRITE_MB_CHAR:
inst_kbc->HIMDO = *data & 0xff;
/*
* Enable KBC OBE interrupt after putting data in
* mouse data register.
*/
inst_kbc->HICTRL |= BIT(NPCX_HICTRL_OBECIE);
break;
case E8042_RESUME_IRQ:
/* Enable KBC IBF interrupt */
inst_kbc->HICTRL |= BIT(NPCX_HICTRL_IBFCIE);
break;
case E8042_PAUSE_IRQ:
/* Disable KBC IBF interrupt */
inst_kbc->HICTRL &= ~BIT(NPCX_HICTRL_IBFCIE);
break;
case E8042_CLEAR_OBF:
/* Clear OBF flag in both STATUS and HIKMST to 0 */
inst_kbc->HICTRL |= BIT(NPCX_HICTRL_FW_OBF);
break;
case E8042_SET_FLAG:
/* FW shouldn't modify these flags directly */
*data &= ~NPCX_KBC_STS_MASK;
inst_kbc->HIKMST |= *data;
break;
case E8042_CLEAR_FLAG:
/* FW shouldn't modify these flags directly */
*data &= ~NPCX_KBC_STS_MASK;
inst_kbc->HIKMST &= ~(*data);
break;
default:
return -EINVAL;
}
} else if (op >= EACPI_START_OPCODE && op <= EACPI_MAX_OPCODE) {
struct pmch_reg *const inst_acpi = host_sub_cfg.inst_pm_acpi;
/* Make sure pm channel for apci is on */
if (!IS_BIT_SET(inst_acpi->HIPMCTL, NPCX_HIPMCTL_IBFIE)) {
return -ENOTSUP;
}
switch (op) {
case EACPI_WRITE_CHAR:
inst_acpi->HIPMDO = (*data & 0xff);
break;
case EACPI_WRITE_STS:
inst_acpi->HIPMST = (*data & 0xff);
break;
default:
return -EINVAL;
}
}
#if defined(CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE)
else if (op >= ECUSTOM_START_OPCODE && op <= ECUSTOM_MAX_OPCODE) {
/* Other customized op codes */
struct pmch_reg *const inst_hcmd = host_sub_cfg.inst_pm_hcmd;
switch (op) {
case ECUSTOM_HOST_SUBS_INTERRUPT_EN:
if (*data != 0) {
host_cus_opcode_enable_interrupts();
} else {
host_cus_opcode_disable_interrupts();
}
break;
case ECUSTOM_HOST_CMD_SEND_RESULT:
/*
* Write result to the data byte. This sets the TOH
* status bit.
*/
inst_hcmd->HIPMDO = (*data & 0xff);
/* Clear processing flag */
inst_hcmd->HIPMST &= ~BIT(NPCX_HIPMST_F0);
break;
default:
return -EINVAL;
}
}
#endif /* CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE */
else {
return -ENOTSUP;
}
return 0;
}
void npcx_host_init_subs_host_domain(void)
{
struct c2h_reg *const inst_c2h = host_sub_cfg.inst_c2h;
/* Enable Core-to-Host access module */
inst_c2h->SIBCTRL |= BIT(NPCX_SIBCTRL_CSAE);
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_8042_KBC)) {
/*
* Select Keyboard/Mouse banks which LDN are 0x06/05 and enable
* modules by setting bit 0 in its Control (index is 0x30) reg.
*/
host_c2h_write_io_cfg_reg(EC_CFG_IDX_LDN, EC_CFG_LDN_KBC);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CTRL, 0x01);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_LDN, EC_CFG_LDN_MOUSE);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CTRL, 0x01);
}
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_HOST_IO)) {
/*
* Select ACPI bank which LDN are 0x11 (PM Channel 1) and enable
* module by setting bit 0 in its Control (index is 0x30) reg.
*/
host_c2h_write_io_cfg_reg(EC_CFG_IDX_LDN, EC_CFG_LDN_ACPI);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CTRL, 0x01);
}
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD) ||
IS_ENABLED(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION)) {
/* Select 'Host Command' bank which LDN are 0x12 (PM chan 2) */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_LDN, EC_CFG_LDN_HCMD);
#if defined(CONFIG_ESPI_PERIPHERAL_HOST_CMD_DATA_PORT_NUM)
/* Configure IO address of CMD portt (default: 0x200) */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CMD_IO_ADDR_H,
(CONFIG_ESPI_PERIPHERAL_HOST_CMD_DATA_PORT_NUM >> 8) & 0xff);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CMD_IO_ADDR_L,
CONFIG_ESPI_PERIPHERAL_HOST_CMD_DATA_PORT_NUM & 0xff);
/* Configure IO address of Data portt (default: 0x204) */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_DATA_IO_ADDR_H,
((CONFIG_ESPI_PERIPHERAL_HOST_CMD_DATA_PORT_NUM + 4) >> 8)
& 0xff);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_DATA_IO_ADDR_L,
(CONFIG_ESPI_PERIPHERAL_HOST_CMD_DATA_PORT_NUM + 4) & 0xff);
#endif
/* Enable 'Host Command' io port (PM Channel 2) */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CTRL, 0x01);
/* Select 'Shared Memory' bank which LDN are 0x0F */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_LDN, EC_CFG_LDN_SHM);
/* WIN 1 & 2 mapping to IO space */
host_c2h_write_io_cfg_reg(0xF1,
host_c2h_read_io_cfg_reg(0xF1) | 0x30);
/* WIN1 as Host Command on the IO address (default: 0x0800) */
#if defined(CONFIG_ESPI_PERIPHERAL_HOST_CMD_PARAM_PORT_NUM)
host_c2h_write_io_cfg_reg(EC_CFG_IDX_SHM_WND1_ADDR_1,
(CONFIG_ESPI_PERIPHERAL_HOST_CMD_PARAM_PORT_NUM >> 8) & 0xff);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_SHM_WND1_ADDR_0,
CONFIG_ESPI_PERIPHERAL_HOST_CMD_PARAM_PORT_NUM & 0xff);
#endif
/* Set WIN2 as MEMMAP on the configured IO address */
#if defined(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION_PORT_NUM)
host_c2h_write_io_cfg_reg(EC_CFG_IDX_SHM_WND2_ADDR_1,
(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION_PORT_NUM >> 8) & 0xff);
host_c2h_write_io_cfg_reg(EC_CFG_IDX_SHM_WND2_ADDR_0,
CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION_PORT_NUM & 0xff);
#endif
/* Enable SHM direct memory access */
host_c2h_write_io_cfg_reg(EC_CFG_IDX_CTRL, 0x01);
}
LOG_DBG("Hos sub-modules configurations are done!");
}
int npcx_host_init_subs_core_domain(const struct device *host_bus_dev,
sys_slist_t *callbacks)
{
struct mswc_reg *const inst_mswc = host_sub_cfg.inst_mswc;
struct shm_reg *const inst_shm = host_sub_cfg.inst_shm;
const struct device *const clk_dev =
device_get_binding(NPCX_CLK_CTRL_NAME);
int i;
host_sub_data.callbacks = callbacks;
host_sub_data.host_bus_dev = host_bus_dev;
/* Turn on all host necessary sub-module clocks first */
for (i = 0; i < host_sub_cfg.clks_size; i++) {
int ret;
ret = clock_control_on(clk_dev, (clock_control_subsys_t *)
&host_sub_cfg.clks_list[i]);
if (ret < 0)
return ret;
}
/* Configure EC legacy configuration IO base address to 0x4E. */
if (!IS_BIT_SET(inst_mswc->MSWCTL1, NPCX_MSWCTL1_VHCFGA)) {
inst_mswc->HCBAL = NPCX_EC_CFG_IO_ADDR;
inst_mswc->HCBAH = 0x0;
}
/*
* Set HOSTWAIT bit and avoid the other settings, then host can freely
* communicate with slave (EC).
*/
inst_shm->SMC_CTL &= BIT(NPCX_SMC_CTL_HOSTWAIT);
/* Clear shared memory status */
inst_shm->SMC_STS = inst_shm->SMC_STS;
/* host sub-module initialization in core domain */
#if defined(CONFIG_ESPI_PERIPHERAL_8042_KBC)