From patchwork Mon Jan 18 12:37:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Campion Kang X-Patchwork-Id: 365882 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41D89C433DB for ; Mon, 18 Jan 2021 12:53:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D18C9222BB for ; Mon, 18 Jan 2021 12:53:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391848AbhARMwp (ORCPT ); Mon, 18 Jan 2021 07:52:45 -0500 Received: from aclms1.advantech.com.tw ([61.58.41.199]:55411 "EHLO aclms1.advantech.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391646AbhARMjT (ORCPT ); Mon, 18 Jan 2021 07:39:19 -0500 Received: from taipei09.ADVANTECH.CORP (unverified [172.20.0.236]) by ACLMS2.ADVANTECH.CORP (Clearswift SMTPRS 5.6.0) with ESMTP id ; Mon, 18 Jan 2021 20:37:59 +0800 Received: from localhost (172.16.12.146) by taipei09.ADVANTECH.CORP (172.20.0.236) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 18 Jan 2021 20:37:58 +0800 From: Campion Kang To: Lee Jones , Rob Herring , , , Jean Delvare , Guenter Roeck , Wim Van Sebroeck , , , AceLan Kao , Campion Kang Subject: [PATCH v6 4/6] mfd: ahc1ec0: Add support for Advantech embedded controller Date: Mon, 18 Jan 2021 20:37:47 +0800 Message-ID: <20210118123749.4769-4-campion.kang@advantech.com.tw> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210118123749.4769-1-campion.kang@advantech.com.tw> References: <20210118123749.4769-1-campion.kang@advantech.com.tw> MIME-Version: 1.0 X-Originating-IP: [172.16.12.146] X-ClientProxiedBy: ACLCAS4.ADVANTECH.CORP (172.20.2.20) To taipei09.ADVANTECH.CORP (172.20.0.236) X-TM-SNTS-SMTP: 9705E325FB43FFEAE6695A50D3F2D961795585F3C03C4823F3523C9DE5A8DB502000:8 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org AHC1EC0 is the embedded controller driver for Advantech industrial products. This provides sub-devices such as hwmon and watchdog, and also expose functions for sub-devices to read/write the value to embedded controller. Changed since V5: - Kconfig: add "AHC1EC0" string to clearly define the EC name - fix the code according to reviewer's suggestion - remove unnecessary header files - change the structure name to lower case, align with others naming Signed-off-by: Campion Kang --- drivers/mfd/Kconfig | 10 + drivers/mfd/Makefile | 2 + drivers/mfd/ahc1ec0.c | 808 ++++++++++++++++++++++++++++++++++++ include/linux/mfd/ahc1ec0.h | 276 ++++++++++++ 4 files changed, 1096 insertions(+) create mode 100644 drivers/mfd/ahc1ec0.c create mode 100644 include/linux/mfd/ahc1ec0.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index bdfce7b15621..7d5fb5c17d9a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2154,5 +2154,15 @@ config MFD_INTEL_M10_BMC additional drivers must be enabled in order to use the functionality of the device. +config MFD_AHC1EC0 + tristate "Advantech AHC1EC0 Embedded Controller Module" + depends on X86 + select MFD_CORE + help + This is the core function that for Advantech EC drivers. It + includes the sub-devices such as hwmon, watchdog, etc. And also + provides expose functions for sub-devices to read/write the value + to embedded controller. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 14fdb188af02..a6af9d8825f4 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -268,3 +268,5 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o + +obj-$(CONFIG_MFD_AHC1EC0) += ahc1ec0.o diff --git a/drivers/mfd/ahc1ec0.c b/drivers/mfd/ahc1ec0.c new file mode 100644 index 000000000000..015f4307a54e --- /dev/null +++ b/drivers/mfd/ahc1ec0.c @@ -0,0 +1,808 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Advantech embedded controller core driver AHC1EC0 + * + * Copyright 2020 Advantech IIoT Group + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRV_NAME "ahc1ec0" + +enum { + ADVEC_SUBDEV_BRIGHTNESS = 0, + ADVEC_SUBDEV_EEPROM, + ADVEC_SUBDEV_GPIO, + ADVEC_SUBDEV_HWMON, + ADVEC_SUBDEV_LED, + ADVEC_SUBDEV_WDT, + ADVEC_SUBDEV_MAX, +}; + +/* Wait IBF (Input Buffer Full) clear */ +static int ec_wait_write(void) +{ + int i; + + for (i = 0; i < EC_MAX_TIMEOUT_COUNT; i++) { + if ((inb(EC_COMMAND_PORT) & EC_COMMAND_BIT_IBF) == 0) + return 0; + + udelay(EC_RETRY_UDELAY); + } + + return -ETIMEDOUT; +} + +/* Wait OBF (Output Buffer Full) data ready */ +static int ec_wait_read(void) +{ + int i; + + for (i = 0; i < EC_MAX_TIMEOUT_COUNT; i++) { + if ((inb(EC_COMMAND_PORT) & EC_COMMAND_BIT_OBF) != 0) + return 0; + + udelay(EC_RETRY_UDELAY); + } + + return -ETIMEDOUT; +} + +/* Read data from EC HW RAM, the process is the following: + * Step 0. Wait IBF clear to send command + * Step 1. Send read command to EC command port + * Step 2. Wait IBF clear that means command is got by EC + * Step 3. Send read address to EC data port + * Step 4. Wait OBF data ready + * Step 5. Get data from EC data port + */ +int read_hw_ram(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, unsigned char *data) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_HW_RAM_READ, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(addr, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + *data = inb(EC_STATUS_PORT); + + mutex_unlock(&adv_ec_data->lock); + + return ret; + +error: + mutex_unlock(&adv_ec_data->lock); + dev_err(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} + +/* Write data to EC HW RAM + * Step 0. Wait IBF clear to send command + * Step 1. Send write command to EC command port + * Step 2. Wait IBF clear that means command is got by EC + * Step 3. Send write address to EC data port + * Step 4. Wait IBF clear that means command is got by EC + * Step 5. Send data to EC data port + */ +int write_hw_ram(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, unsigned char data) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_HW_RAM_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(addr, EC_STATUS_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(data, EC_STATUS_PORT); + + mutex_unlock(&adv_ec_data->lock); + + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_err(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} +EXPORT_SYMBOL_GPL(write_hw_ram); + +/* Get dynamic control table */ +static int adv_get_dynamic_tab(struct adv_ec_platform_data *adv_ec_data) +{ + int i, ret; + unsigned char pin_tmp, device_id; + + mutex_lock(&adv_ec_data->lock); + + for (i = 0; i < EC_MAX_TBL_NUM; i++) { + adv_ec_data->dym_tbl[i].device_id = 0xff; + adv_ec_data->dym_tbl[i].hw_pin_num = 0xff; + } + + for (i = 0; i < EC_MAX_TBL_NUM; i++) { + ret = ec_wait_write(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_write. line: %d\n", __func__, + __LINE__); + goto error; + } + outb(EC_TBL_WRITE_ITEM, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_write. line: %d\n", __func__, + __LINE__); + goto error; + } + outb(i, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_read. line: %d\n", __func__, + __LINE__); + goto error; + } + + /* + * If item is defined, EC will return item number. + * If table item is not defined, EC will return 0xFF. + */ + pin_tmp = inb(EC_STATUS_PORT); + if (pin_tmp == 0xff) { + dev_dbg(adv_ec_data->dev, "%s: inb(EC_STATUS_PORT)=0x%02x != 0xff.\n", + __func__, pin_tmp); + goto pass; + } + + ret = ec_wait_write(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_write. line: %d\n", __func__, + __LINE__); + goto error; + } + outb(EC_TBL_GET_PIN, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_read. line: %d\n", __func__, + __LINE__); + goto error; + } + pin_tmp = inb(EC_STATUS_PORT) & 0xff; + if (pin_tmp == 0xff) { + dev_dbg(adv_ec_data->dev, "%s: pin_tmp(0x%02X). line: %d\n", __func__, + pin_tmp, __LINE__); + goto pass; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_TBL_GET_DEVID, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) { + dev_dbg(adv_ec_data->dev, "%s: ec_wait_read. line: %d\n", __func__, + __LINE__); + goto error; + } + device_id = inb(EC_STATUS_PORT) & 0xff; + + dev_dbg(adv_ec_data->dev, "%s: device_id=0x%02X. line: %d\n", __func__, + device_id, __LINE__); + + adv_ec_data->dym_tbl[i].device_id = device_id; + adv_ec_data->dym_tbl[i].hw_pin_num = pin_tmp; + } + +pass: + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + dev_err(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", + __func__, __LINE__); + return ret; +} + +int read_ad_value(struct adv_ec_platform_data *adv_ec_data, unsigned char hwpin, + unsigned char multi) +{ + int ret; + u32 ret_val; + unsigned int LSB, MSB; + + mutex_lock(&adv_ec_data->lock); + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_AD_INDEX_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(hwpin, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + + if (inb(EC_STATUS_PORT) == 0xff) { + mutex_unlock(&adv_ec_data->lock); + return -1; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_AD_LSB_READ, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + LSB = inb(EC_STATUS_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_AD_MSB_READ, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + MSB = inb(EC_STATUS_PORT); + ret_val = ((MSB << 8) | LSB) & 0x03FF; + ret_val = ret_val * multi * 100; + + mutex_unlock(&adv_ec_data->lock); + return ret_val; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} +EXPORT_SYMBOL_GPL(read_ad_value); + +int read_acpi_value(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char *pvalue) +{ + int ret; + unsigned char value; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_ACPI_RAM_READ, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(addr, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + value = inb(EC_STATUS_PORT); + *pvalue = value; + + mutex_unlock(&adv_ec_data->lock); + + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} +EXPORT_SYMBOL_GPL(read_acpi_value); + +int write_acpi_value(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char value) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_ACPI_DATA_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(addr, EC_STATUS_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(value, EC_STATUS_PORT); + + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} + +int read_gpio_status(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char *pvalue) +{ + int ret; + + unsigned char gpio_status_value; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(PinNumber, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + + if (inb(EC_STATUS_PORT) == 0xff) { + dev_err(adv_ec_data->dev, "%s: Read Pin Number error!!\n", __func__); + mutex_unlock(&adv_ec_data->lock); + return -1; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_STATUS_READ, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + gpio_status_value = inb(EC_STATUS_PORT); + + *pvalue = gpio_status_value; + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + return ret; +} + +int write_gpio_status(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char value) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(PinNumber, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + + if (inb(EC_STATUS_PORT) == 0xff) { + mutex_unlock(&adv_ec_data->lock); + dev_err(adv_ec_data->dev, "%s: Read Pin Number error!!\n", __func__); + return -1; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_STATUS_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(value, EC_STATUS_PORT); + + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + dev_err(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d", __func__, + __LINE__); + + return ret; +} + +int read_gpio_dir(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char *pvalue) +{ + int ret; + unsigned char gpio_dir_value; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(PinNumber, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + + if (inb(EC_STATUS_PORT) == 0xff) { + mutex_unlock(&adv_ec_data->lock); + dev_err(adv_ec_data->dev, "%s: Read Pin Number error!! line: %d\n", __func__, + __LINE__); + return -1; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_DIR_READ, EC_COMMAND_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + gpio_dir_value = inb(EC_STATUS_PORT); + *pvalue = gpio_dir_value; + + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} + +int write_gpio_dir(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char value) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_INDEX_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(PinNumber, EC_STATUS_PORT); + + ret = ec_wait_read(); + if (ret) + goto error; + + if (inb(EC_STATUS_PORT) == 0xff) { + mutex_unlock(&adv_ec_data->lock); + dev_warn(adv_ec_data->dev, "%s: Read Pin Number error!! line: %d\n", __func__, + __LINE__); + + return -1; + } + + ret = ec_wait_write(); + if (ret) + goto error; + outb(EC_GPIO_DIR_WRITE, EC_COMMAND_PORT); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(value, EC_STATUS_PORT); + + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} + +int write_hwram_command(struct adv_ec_platform_data *adv_ec_data, unsigned char data) +{ + int ret; + + mutex_lock(&adv_ec_data->lock); + + ret = ec_wait_write(); + if (ret) + goto error; + outb(data, EC_COMMAND_PORT); + + mutex_unlock(&adv_ec_data->lock); + return 0; + +error: + mutex_unlock(&adv_ec_data->lock); + + dev_warn(adv_ec_data->dev, "%s: Wait for IBF or OBF too long. line: %d\n", __func__, + __LINE__); + + return ret; +} +EXPORT_SYMBOL_GPL(write_hwram_command); + +static int adv_ec_get_productname(struct adv_ec_platform_data *adv_ec_data, char *product) +{ + const char *vendor, *device; + int length = 0; + + /* Check it is Advantech board */ + vendor = dmi_get_system_info(DMI_SYS_VENDOR); + if (memcmp(vendor, "Advantech", sizeof("Advantech")) != 0) + return -ENODEV; + + /* Get product model name */ + device = dmi_get_system_info(DMI_PRODUCT_NAME); + if (device) { + while ((device[length] != ' ') + && (length < AMI_ADVANTECH_BOARD_ID_LENGTH)) + length++; + memset(product, 0, AMI_ADVANTECH_BOARD_ID_LENGTH); + memmove(product, device, length); + + dev_info(adv_ec_data->dev, "BIOS Product Name = %s\n", product); + + return 0; + } + + dev_warn(adv_ec_data->dev, "This device is not Advantech Board (%s)!\n", product); + + return -ENODEV; +} + +static const struct mfd_cell adv_ec_sub_cells[] = { + { .name = "adv-ec-brightness", }, + { .name = "adv-ec-eeprom", }, + { .name = "adv-ec-gpio", }, + { .name = "ahc1ec0-hwmon", }, + { .name = "adv-ec-led", }, + { .name = "ahc1ec0-wdt", }, +}; + +static int adv_ec_init_ec_data(struct adv_ec_platform_data *adv_ec_data) +{ + int ret; + + adv_ec_data->sub_dev_mask = 0; + adv_ec_data->sub_dev_nb = 0; + adv_ec_data->dym_tbl = NULL; + adv_ec_data->bios_product_name = NULL; + + mutex_init(&adv_ec_data->lock); + + /* Get product name */ + adv_ec_data->bios_product_name = + devm_kzalloc(adv_ec_data->dev, AMI_ADVANTECH_BOARD_ID_LENGTH, GFP_KERNEL); + if (!adv_ec_data->bios_product_name) + return -ENOMEM; + + memset(adv_ec_data->bios_product_name, 0, AMI_ADVANTECH_BOARD_ID_LENGTH); + ret = adv_ec_get_productname(adv_ec_data, adv_ec_data->bios_product_name); + if (ret) + return ret; + + /* Get pin table */ + adv_ec_data->dym_tbl = devm_kzalloc(adv_ec_data->dev, + EC_MAX_TBL_NUM * sizeof(struct ec_dynamic_table), + GFP_KERNEL); + if (!adv_ec_data->dym_tbl) + return -ENOMEM; + + ret = adv_get_dynamic_tab(adv_ec_data); + + return ret; +} + +static int adv_ec_parse_prop(struct adv_ec_platform_data *adv_ec_data) +{ + int i, ret; + u32 nb, sub_dev[ADVEC_SUBDEV_MAX]; + + ret = device_property_read_u32(adv_ec_data->dev, "advantech,sub-dev-nb", &nb); + if (ret < 0) { + dev_err(adv_ec_data->dev, "get sub-dev-nb failed! (%d)\n", ret); + return ret; + } + adv_ec_data->sub_dev_nb = nb; + + ret = device_property_read_u32_array(adv_ec_data->dev, "advantech,sub-dev", + sub_dev, nb); + if (ret < 0) { + dev_err(adv_ec_data->dev, "get sub-dev failed! (%d)\n", ret); + return ret; + } + + for (i = 0; i < nb; i++) { + switch (sub_dev[i]) { + case ADVEC_SUBDEV_BRIGHTNESS: + case ADVEC_SUBDEV_EEPROM: + case ADVEC_SUBDEV_GPIO: + case ADVEC_SUBDEV_HWMON: + case ADVEC_SUBDEV_LED: + case ADVEC_SUBDEV_WDT: + adv_ec_data->sub_dev_mask |= BIT(sub_dev[i]); + break; + default: + dev_err(adv_ec_data->dev, "invalid prop value(%d)!\n", + sub_dev[i]); + } + } + dev_info(adv_ec_data->dev, "sub-dev mask = 0x%x\n", adv_ec_data->sub_dev_mask); + + return 0; +} + +static int adv_ec_probe(struct platform_device *pdev) +{ + int ret, i; + struct device *dev = &pdev->dev; + struct adv_ec_platform_data *adv_ec_data; + + adv_ec_data = devm_kzalloc(dev, sizeof(struct adv_ec_platform_data), GFP_KERNEL); + if (!adv_ec_data) + return -ENOMEM; + + dev_set_drvdata(dev, adv_ec_data); + adv_ec_data->dev = dev; + + ret = adv_ec_init_ec_data(adv_ec_data); + if (ret) + goto err_init_data; + + ret = adv_ec_parse_prop(adv_ec_data); + if (ret) + goto err_prop; + + /* check whether this EC has the following subdevices. */ + for (i = 0; i < ARRAY_SIZE(adv_ec_sub_cells); i++) { + if (adv_ec_data->sub_dev_mask & BIT(i)) { + ret = mfd_add_hotplug_devices(dev, &adv_ec_sub_cells[i], 1); + dev_info(adv_ec_data->dev, "mfd_add_hotplug_devices[%d] %s\n", i, + adv_ec_sub_cells[i].name); + if (ret) + dev_err(dev, "failed to add %s subdevice: %d\n", + adv_ec_sub_cells[i].name, ret); + } + } + + dev_info(adv_ec_data->dev, "Advantech EC probe done"); + + return 0; + +err_prop: + dev_err(dev, "failed to probe\n"); + +err_init_data: + mutex_destroy(&adv_ec_data->lock); + + dev_err(dev, "failed to init data\n"); + + return ret; +} + +static int adv_ec_remove(struct platform_device *pdev) +{ + struct adv_ec_platform_data *adv_ec_data; + + adv_ec_data = dev_get_drvdata(&pdev->dev); + + mutex_destroy(&adv_ec_data->lock); + + mfd_remove_devices(&pdev->dev); + + return 0; +} + +static const struct of_device_id adv_ec_of_match[] __maybe_unused = { + { + .compatible = "advantech,ahc1ec0", + }, + {} +}; +MODULE_DEVICE_TABLE(of, adv_ec_of_match); + +static const struct acpi_device_id adv_ec_acpi_match[] __maybe_unused = { + {"AHC1EC0", 0}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, adv_ec_acpi_match); + +static struct platform_driver adv_ec_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(adv_ec_of_match), + .acpi_match_table = ACPI_PTR(adv_ec_acpi_match), + }, + .probe = adv_ec_probe, + .remove = adv_ec_remove, +}; +module_platform_driver(adv_ec_driver); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DESCRIPTION("Advantech Embedded Controller core driver."); +MODULE_AUTHOR("Campion Kang "); +MODULE_AUTHOR("Jianfeng Dai "); +MODULE_VERSION("1.0"); diff --git a/include/linux/mfd/ahc1ec0.h b/include/linux/mfd/ahc1ec0.h new file mode 100644 index 000000000000..1b01e10c1fef --- /dev/null +++ b/include/linux/mfd/ahc1ec0.h @@ -0,0 +1,276 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef __LINUX_MFD_AHC1EC0_H +#define __LINUX_MFD_AHC1EC0_H + +#include + +#define EC_COMMAND_PORT 0x29A /* EC I/O command port */ +#define EC_STATUS_PORT 0x299 /* EC I/O data port */ + +#define EC_RETRY_UDELAY 200 /* EC command retry delay in microseconds */ +#define EC_MAX_TIMEOUT_COUNT 5000 /* EC command max retry count */ +#define EC_COMMAND_BIT_OBF 0x01 /* Bit 0 is for OBF ready (Output buffer full) */ +#define EC_COMMAND_BIT_IBF 0x02 /* Bit 1 is for IBF ready (Input buffer full) */ + +/* Analog to digital converter command */ +#define EC_AD_INDEX_WRITE 0x15 /* Write ADC port number into index */ +#define EC_AD_LSB_READ 0x16 /* Read ADC LSB value from ADC port */ +#define EC_AD_MSB_READ 0x1F /* Read ADC MSB value from ADC port */ + +/* Voltage device ID */ +#define EC_DID_SMBOEM0 0x28 /* SMBUS/I2C. Smbus channel 0 */ +#define EC_DID_CMOSBAT 0x50 /* CMOS coin battery voltage */ +#define EC_DID_CMOSBAT_X2 0x51 /* CMOS coin battery voltage*2 */ +#define EC_DID_CMOSBAT_X10 0x52 /* CMOS coin battery voltage*10 */ +#define EC_DID_5VS0 0x56 /* 5VS0 voltage */ +#define EC_DID_5VS0_X2 0x57 /* 5VS0 voltage*2 */ +#define EC_DID_5VS0_X10 0x58 /* 5VS0 voltage*10 */ +#define EC_DID_5VS5 0x59 /* 5VS5 voltage */ +#define EC_DID_5VS5_X2 0x5A /* 5VS5 voltage*2 */ +#define EC_DID_5VS5_X10 0x5B /* 5VS5 voltage*10 */ +#define EC_DID_12VS0 0x62 /* 12VS0 voltage */ +#define EC_DID_12VS0_X2 0x63 /* 12VS0 voltage*2 */ +#define EC_DID_12VS0_X10 0x64 /* 12VS0 voltage*10 */ +#define EC_DID_VCOREA 0x65 /* CPU A core voltage */ +#define EC_DID_VCOREA_X2 0x66 /* CPU A core voltage*2 */ +#define EC_DID_VCOREA_X10 0x67 /* CPU A core voltage*10 */ +#define EC_DID_VCOREB 0x68 /* CPU B core voltage */ +#define EC_DID_VCOREB_X2 0x69 /* CPU B core voltage*2 */ +#define EC_DID_VCOREB_X10 0x6A /* CPU B core voltage*10 */ +#define EC_DID_DC 0x6B /* ADC. onboard voltage */ +#define EC_DID_DC_X2 0x6C /* ADC. onboard voltage*2 */ +#define EC_DID_DC_X10 0x6D /* ADC. onboard voltage*10 */ + +/* Current device ID */ +#define EC_DID_CURRENT 0x74 + +/* ACPI commands */ +#define EC_ACPI_RAM_READ 0x80 +#define EC_ACPI_RAM_WRITE 0x81 + +/* + * Dynamic control table commands + * The table includes HW pin number, Device ID, and Pin polarity + */ +#define EC_TBL_WRITE_ITEM 0x20 +#define EC_TBL_GET_PIN 0x21 +#define EC_TBL_GET_DEVID 0x22 +#define EC_MAX_TBL_NUM 32 + +/* LED Device ID table */ +#define EC_DID_LED_RUN 0xE1 +#define EC_DID_LED_ERR 0xE2 +#define EC_DID_LED_SYS_RECOVERY 0xE3 +#define EC_DID_LED_D105_G 0xE4 +#define EC_DID_LED_D106_G 0xE5 +#define EC_DID_LED_D107_G 0xE6 + +/* LED control HW RAM address 0xA0-0xAF */ +#define EC_HWRAM_LED_BASE_ADDR 0xA0 +#define EC_HWRAM_LED_PIN(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N))) // N:0-3 +#define EC_HWRAM_LED_CTRL_HIBYTE(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 1) +#define EC_HWRAM_LED_CTRL_LOBYTE(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 2) +#define EC_HWRAM_LED_DEVICE_ID(N) (EC_HWRAM_LED_BASE_ADDR + (4 * (N)) + 3) + +/* LED control bit */ +#define LED_CTRL_ENABLE_BIT() BIT(4) +#define LED_CTRL_INTCTL_BIT() BIT(5) +#define LED_CTRL_LEDBIT_MASK (0x03FF << 6) +#define LED_CTRL_POLARITY_MASK (0x000F << 0) +#define LED_CTRL_INTCTL_EXTERNAL 0 +#define LED_CTRL_INTCTL_INTERNAL 1 + +#define LED_DISABLE 0x0 +#define LED_ON 0x1 +#define LED_FAST 0x3 +#define LED_NORMAL 0x5 +#define LED_SLOW 0x7 +#define LED_MANUAL 0xF + +#define LED_CTRL_LEDBIT_DISABLE 0x0000 +#define LED_CTRL_LEDBIT_ON 0x03FF +#define LED_CTRL_LEDBIT_FAST 0x02AA +#define LED_CTRL_LEDBIT_NORMAL 0x0333 +#define LED_CTRL_LEDBIT_SLOW 0x03E0 + +/* Get the device name */ +#define AMI_ADVANTECH_BOARD_ID_LENGTH 32 + +/* + * Advantech Embedded Controller watchdog commands + * EC can send multi-stage watchdog event. System can setup watchdog event + * independently to make up event sequence. + */ +#define EC_COMMANS_PORT_IBF_MASK 0x02 +#define EC_RESET_EVENT 0x04 +#define EC_WDT_START 0x28 +#define EC_WDT_STOP 0x29 +#define EC_WDT_RESET 0x2A +#define EC_WDT_BOOTTMEWDT_STOP 0x2B + +#define EC_HW_RAM 0x89 + +#define EC_EVENT_FLAG 0x57 +#define EC_ENABLE_DELAY_H 0x58 +#define EC_ENABLE_DELAY_L 0x59 +#define EC_POWER_BTN_TIME_H 0x5A +#define EC_POWER_BTN_TIME_L 0x5B +#define EC_RESET_DELAY_TIME_H 0x5E +#define EC_RESET_DELAY_TIME_L 0x5F +#define EC_PIN_DELAY_TIME_H 0x60 +#define EC_PIN_DELAY_TIME_L 0x61 +#define EC_SCI_DELAY_TIME_H 0x62 +#define EC_SCI_DELAY_TIME_L 0x63 + +/* EC ACPI commands */ +#define EC_ACPI_DATA_READ 0x80 +#define EC_ACPI_DATA_WRITE 0x81 + +/* Brightness ACPI Addr */ +#define BRIGHTNESS_ACPI_ADDR 0x50 + +/* EC HW RAM commands */ +#define EC_HW_EXTEND_RAM_READ 0x86 +#define EC_HW_EXTEND_RAM_WRITE 0x87 +#define EC_HW_RAM_READ 0x88 +#define EC_HW_RAM_WRITE 0x89 + +/* EC Smbus commands */ +#define EC_SMBUS_CHANNEL_SET 0x8A /* Set selector number (SMBUS channel) */ +#define EC_SMBUS_ENABLE_I2C 0x8C /* Enable channel I2C */ +#define EC_SMBUS_DISABLE_I2C 0x8D /* Disable channel I2C */ + +/* Smbus transmit protocol */ +#define EC_SMBUS_PROTOCOL 0x00 + +/* SMBUS status */ +#define EC_SMBUS_STATUS 0x01 + +/* SMBUS device slave address (bit0 must be 0) */ +#define EC_SMBUS_SLV_ADDR 0x02 + +/* SMBUS device command */ +#define EC_SMBUS_CMD 0x03 + +/* 0x04-0x24 Data In read process, return data are stored in this address */ +#define EC_SMBUS_DATA 0x04 + +#define EC_SMBUS_DAT_OFFSET(n) (EC_SMBUS_DATA + (n)) + +/* SMBUS channel selector (0-4) */ +#define EC_SMBUS_CHANNEL 0x2B + +/* EC SMBUS transmit Protocol code */ +#define SMBUS_QUICK_WRITE 0x02 /* Write Quick Command */ +#define SMBUS_QUICK_READ 0x03 /* Read Quick Command */ +#define SMBUS_BYTE_SEND 0x04 /* Send Byte */ +#define SMBUS_BYTE_RECEIVE 0x05 /* Receive Byte */ +#define SMBUS_BYTE_WRITE 0x06 /* Write Byte */ +#define SMBUS_BYTE_READ 0x07 /* Read Byte */ +#define SMBUS_WORD_WRITE 0x08 /* Write Word */ +#define SMBUS_WORD_READ 0x09 /* Read Word */ +#define SMBUS_BLOCK_WRITE 0x0A /* Write Block */ +#define SMBUS_BLOCK_READ 0x0B /* Read Block */ +#define SMBUS_PROC_CALL 0x0C /* Process Call */ +#define SMBUS_BLOCK_PROC_CALL 0x0D /* Write Block-Read Block Process Call */ +#define SMBUS_I2C_READ_WRITE 0x0E /* I2C block Read-Write */ +#define SMBUS_I2C_WRITE_READ 0x0F /* I2C block Write-Read */ + +/* GPIO control commands */ +#define EC_GPIO_INDEX_WRITE 0x10 +#define EC_GPIO_STATUS_READ 0x11 +#define EC_GPIO_STATUS_WRITE 0x12 +#define EC_GPIO_DIR_READ 0x1D +#define EC_GPIO_DIR_WRITE 0x1E + +/* One Key Recovery commands */ +#define EC_ONE_KEY_FLAG 0x9C + +/* ASG OEM commands */ +#define EC_ASG_OEM 0xEA +#define EC_ASG_OEM_READ 0x00 +#define EC_ASG_OEM_WRITE 0x01 +#define EC_OEM_POWER_STATUS_VIN1 0X10 +#define EC_OEM_POWER_STATUS_VIN2 0X11 +#define EC_OEM_POWER_STATUS_BAT1 0X12 +#define EC_OEM_POWER_STATUS_BAT2 0X13 + +/* GPIO DEVICE ID */ +#define EC_DID_ALTGPIO_0 0x10 /* 0x10 AltGpio0 User define gpio */ +#define EC_DID_ALTGPIO_1 0x11 /* 0x11 AltGpio1 User define gpio */ +#define EC_DID_ALTGPIO_2 0x12 /* 0x12 AltGpio2 User define gpio */ +#define EC_DID_ALTGPIO_3 0x13 /* 0x13 AltGpio3 User define gpio */ +#define EC_DID_ALTGPIO_4 0x14 /* 0x14 AltGpio4 User define gpio */ +#define EC_DID_ALTGPIO_5 0x15 /* 0x15 AltGpio5 User define gpio */ +#define EC_DID_ALTGPIO_6 0x16 /* 0x16 AltGpio6 User define gpio */ +#define EC_DID_ALTGPIO_7 0x17 /* 0x17 AltGpio7 User define gpio */ + +/* Lmsensor Chip Register */ +#define NSLM96163_CHANNEL 0x02 + +/* NS_LM96163 address 0x98 */ +#define NSLM96163_ADDR 0x98 + +/* LM96163 index(0x00) Local Temperature (Signed MSB) */ +#define NSLM96163_LOC_TEMP 0x00 + +/* HWMON registers */ +#define INA266_REG_VOLTAGE 0x02 /* 1.25mV */ +#define INA266_REG_POWER 0x03 /* 25mW */ +#define INA266_REG_CURRENT 0x04 /* 1mA */ + +struct ec_hw_pin_table { + unsigned int vbat[2]; + unsigned int v5[2]; + unsigned int v12[2]; + unsigned int vcore[2]; + unsigned int vdc[2]; + unsigned int ec_current[2]; + unsigned int power[2]; +}; + +struct ec_dynamic_table { + unsigned char device_id; + unsigned char hw_pin_num; +}; + +struct ec_smbuso_em0 { + unsigned char hw_pin_num; +}; + +struct pled_hw_pin_tbl { + unsigned int pled[6]; +}; + +struct adv_ec_platform_data { + char *bios_product_name; + int sub_dev_nb; + u32 sub_dev_mask; + struct mutex lock; + struct device *dev; + struct class *adv_ec_class; + + struct ec_dynamic_table *dym_tbl; +}; + +int read_ad_value(struct adv_ec_platform_data *adv_ec_data, unsigned char hwpin, + unsigned char multi); +int read_acpi_value(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char *pvalue); +int write_acpi_value(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char value); +int read_hw_ram(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char *data); +int write_hw_ram(struct adv_ec_platform_data *adv_ec_data, unsigned char addr, + unsigned char data); +int write_hwram_command(struct adv_ec_platform_data *adv_ec_data, unsigned char data); +int read_gpio_status(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char *pvalue); +int write_gpio_status(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char value); +int read_gpio_dir(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char *pvalue); +int write_gpio_dir(struct adv_ec_platform_data *adv_ec_data, unsigned char PinNumber, + unsigned char value); + +#endif /* __LINUX_MFD_AHC1EC0_H */