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([144.202.86.13]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-842abd5927fsm27375046a12.10.2025.01.05.09.44.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jan 2025 09:44:23 -0800 (PST) From: Pengyu Luo To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Sebastian Reichel , Heikki Krogerus , Greg Kroah-Hartman , Jean Delvare , Guenter Roeck Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-hwmon@vger.kernel.org, Dmitry Baryshkov , Pengyu Luo Subject: [PATCH v2 2/5] platform: arm64: add Huawei Matebook E Go EC driver Date: Mon, 6 Jan 2025 01:41:56 +0800 Message-ID: <20250105174159.227831-3-mitltlatltl@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250105174159.227831-1-mitltlatltl@gmail.com> References: <20250105174159.227831-1-mitltlatltl@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 There are three variants of which Huawei released the first two simultaneously. Huawei Matebook E Go LTE(sc8180x), codename seems to be gaokun2. Huawei Matebook E Go(sc8280xp@3.0GHz), codename must be gaokun3. (see [1]) Huawei Matebook E Go 2023(sc8280xp@2.69GHz), codename should be also gaokun3. Adding support for the latter two variants for now, this driver should also work for the sc8180x variant according to acpi table files, but I don't have the device to test yet. Different from other Qualcomm Snapdragon sc8280xp based machines, the Huawei Matebook E Go uses an embedded controller while others use a system called PMIC GLink. This embedded controller can be used to perform a set of various functions, including, but not limited to: - Battery and charger monitoring; - Charge control and smart charge; - Fn_lock settings; - Tablet lid status; - Temperature sensors; - USB Type-C notifications (ports orientation, DP alt mode HPD); - USB Type-C PD (according to observation, up to 48w). Add a driver for the EC which creates devices for UCSI and power supply devices. [1] https://bugzilla.kernel.org/show_bug.cgi?id=219645 Signed-off-by: Pengyu Luo --- MAINTAINERS | 9 + drivers/platform/arm64/Kconfig | 21 + drivers/platform/arm64/Makefile | 1 + drivers/platform/arm64/huawei-gaokun-ec.c | 767 ++++++++++++++++++ .../linux/platform_data/huawei-gaokun-ec.h | 79 ++ 5 files changed, 877 insertions(+) create mode 100644 drivers/platform/arm64/huawei-gaokun-ec.c create mode 100644 include/linux/platform_data/huawei-gaokun-ec.h diff --git a/MAINTAINERS b/MAINTAINERS index 85c8a68d1..04263ba32 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10595,6 +10595,15 @@ S: Maintained F: Documentation/networking/device_drivers/ethernet/huawei/hinic.rst F: drivers/net/ethernet/huawei/hinic/ +HUAWEI MATEBOOK E GO EMBEDDED CONTROLLER DRIVER +M: Pengyu Luo +S: Maintained +F: Documentation/devicetree/bindings/platform/huawei,gaokun-ec.yaml +F: drivers/platform/arm64/huawei-gaokun-ec.c +F: drivers/power/supply/huawei-gaokun-battery.c +F: drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c +F: include/linux/platform_data/huawei-gaokun-ec.h + HUGETLB SUBSYSTEM M: Muchun Song L: linux-mm@kvack.org diff --git a/drivers/platform/arm64/Kconfig b/drivers/platform/arm64/Kconfig index f88395ea3..67dc7aa95 100644 --- a/drivers/platform/arm64/Kconfig +++ b/drivers/platform/arm64/Kconfig @@ -33,6 +33,27 @@ config EC_ACER_ASPIRE1 laptop where this information is not properly exposed via the standard ACPI devices. +config EC_HUAWEI_GAOKUN + tristate "Huawei Matebook E Go Embedded Controller driver" + depends on ARCH_QCOM || COMPILE_TEST + depends on I2C + depends on DRM + depends on POWER_SUPPLY + depends on INPUT + help + Say Y here to enable the EC driver for the Huawei Matebook E Go + which is a sc8280xp-based 2-in-1 tablet. The driver handles battery + (information, charge control) and USB Type-C DP HPD events as well + as some misc functions like the lid sensor and temperature sensors, + etc. + + This driver provides battery and AC status support for the mentioned + laptop where this information is not properly exposed via the + standard ACPI devices. + + Say M or Y here to include this support. + + config EC_LENOVO_YOGA_C630 tristate "Lenovo Yoga C630 Embedded Controller driver" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/platform/arm64/Makefile b/drivers/platform/arm64/Makefile index b2ae9114f..46a99eba3 100644 --- a/drivers/platform/arm64/Makefile +++ b/drivers/platform/arm64/Makefile @@ -6,4 +6,5 @@ # obj-$(CONFIG_EC_ACER_ASPIRE1) += acer-aspire1-ec.o +obj-$(CONFIG_EC_HUAWEI_GAOKUN) += huawei-gaokun-ec.o obj-$(CONFIG_EC_LENOVO_YOGA_C630) += lenovo-yoga-c630.o diff --git a/drivers/platform/arm64/huawei-gaokun-ec.c b/drivers/platform/arm64/huawei-gaokun-ec.c new file mode 100644 index 000000000..743885a3b --- /dev/null +++ b/drivers/platform/arm64/huawei-gaokun-ec.c @@ -0,0 +1,767 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * huawei-gaokun-ec - An EC driver for HUAWEI Matebook E Go + * + * reference: drivers/platform/arm64/acer-aspire1-ec.c + * drivers/platform/arm64/lenovo-yoga-c630.c + * drivers/platform/x86/huawei-wmi.c + * + * Copyright (C) 2024 Pengyu Luo + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define EC_EVENT 0x06 + +/* Also can be found in ACPI specification 12.3 */ +#define EC_READ 0x80 +#define EC_WRITE 0x81 +#define EC_BURST 0x82 +#define EC_QUERY 0x84 + +#define EC_FN_LOCK_ON 0x5A +#define EC_FN_LOCK_OFF 0x55 + +#define EC_EVENT_LID 0x81 + +#define EC_LID_STATE 0x80 +#define EC_LID_OPEN BIT(1) + +#define UCSI_REG_SIZE 7 + +/* + * for tx, command sequences are arranged as + * {master_cmd, slave_cmd, data_len, data_seq} + */ +#define REQ_HDR_SIZE 3 +#define INPUT_SIZE_OFFSET 2 +#define REQ_LEN(req) (REQ_HDR_SIZE + req[INPUT_SIZE_OFFSET]) + +/* + * for rx, data sequences are arranged as + * {status, data_len(unreliable), data_seq} + */ +#define RESP_HDR_SIZE 2 + +#define MKREQ(REG0, REG1, SIZE, ...) \ +{ \ + REG0, REG1, SIZE, \ + /* ## will remove comma when SIZE is 0 */ \ + ## __VA_ARGS__, \ + /* make sure len(pkt[3:]) >= SIZE */ \ + [3 + SIZE] = 0, \ +} + +#define MKRESP(SIZE) \ +{ \ + [RESP_HDR_SIZE + SIZE - 1] = 0, \ +} + +static inline void refill_req(u8 *dest, const u8 *src, size_t size) +{ + memcpy(dest + REQ_HDR_SIZE, src, size); +} + +static inline void extr_resp(u8 *dest, const u8 *src, size_t size) +{ + memcpy(dest, src + RESP_HDR_SIZE, size); +} + +struct gaokun_ec { + struct i2c_client *client; + struct mutex lock; /* EC transaction lock */ + struct blocking_notifier_head notifier_list; + struct device *hwmon_dev; + struct input_dev *idev; + bool suspended; +}; + +static int gaokun_ec_request(struct gaokun_ec *ec, const u8 *req, + size_t resp_len, u8 *resp) +{ + struct i2c_client *client = ec->client; + struct i2c_msg msgs[2] = { + { + .addr = client->addr, + .flags = client->flags, + .len = REQ_LEN(req), + .buf = req, + }, { + .addr = client->addr, + .flags = client->flags | I2C_M_RD, + .len = resp_len, + .buf = resp, + }, + }; + + mutex_lock(&ec->lock); + + i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + usleep_range(2000, 2500); /* have a break, acpi did this */ + + mutex_unlock(&ec->lock); + + return *resp; +} + +/* -------------------------------------------------------------------------- */ +/* Common API */ + +/** + * gaokun_ec_read - read from EC + * @ec: The gaokun_ec + * @req: The sequence to request + * @resp_len: The size to read + * @resp: Where the data are read to + * + * Return: 0 on success or negative error code. + * + * This function is used to read data after writing a magic sequence to EC. + * All EC operations depend on this function. + * + * Huawei uses magic sequences everywhere to complete various functions, all + * these sequences are passed to ECCD(a ACPI method which is quiet similar + * to gaokun_ec_request), there is no good abstraction to generalize these + * sequences, so just wrap it for now. Almost all magic sequences are kept + * in this file. + */ +int gaokun_ec_read(struct gaokun_ec *ec, const u8 *req, + size_t resp_len, u8 *resp) +{ + return gaokun_ec_request(ec, req, resp_len, resp); +} +EXPORT_SYMBOL_GPL(gaokun_ec_read); + +/** + * gaokun_ec_write - write to EC + * @ec: The gaokun_ec + * @req: The sequence to request + * + * Return: 0 on success or negative error code. + * + * This function has no big difference from gaokun_ec_read. When caller care + * only write status and no actual data are returned, then use it. + */ +int gaokun_ec_write(struct gaokun_ec *ec, u8 *req) +{ + u8 resp[] = MKRESP(0); + + return gaokun_ec_request(ec, req, sizeof(resp), resp); +} +EXPORT_SYMBOL_GPL(gaokun_ec_write); + +int gaokun_ec_read_byte(struct gaokun_ec *ec, u8 *req, u8 *byte) +{ + int ret; + u8 resp[] = MKRESP(sizeof(*byte)); + + ret = gaokun_ec_read(ec, req, sizeof(resp), resp); + extr_resp(byte, resp, sizeof(*byte)); + + return ret; +} +EXPORT_SYMBOL_GPL(gaokun_ec_read_byte); + +/** + * gaokun_ec_register_notify - Register a notifier callback for EC events. + * @ec: The gaokun_ec + * @nb: Notifier block pointer to register + * + * Return: 0 on success or negative error code. + */ +int gaokun_ec_register_notify(struct gaokun_ec *ec, struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&ec->notifier_list, nb); +} +EXPORT_SYMBOL_GPL(gaokun_ec_register_notify); + +/** + * gaokun_ec_unregister_notify - Unregister notifier callback for EC events. + * @ec: The gaokun_ec + * @nb: Notifier block pointer to unregister + * + * Unregister a notifier callback that was previously registered with + * gaokun_ec_register_notify(). + */ +void gaokun_ec_unregister_notify(struct gaokun_ec *ec, struct notifier_block *nb) +{ + blocking_notifier_chain_unregister(&ec->notifier_list, nb); +} +EXPORT_SYMBOL_GPL(gaokun_ec_unregister_notify); + +/* -------------------------------------------------------------------------- */ +/* API For PSY */ + +int gaokun_ec_psy_multi_read(struct gaokun_ec *ec, u8 reg, + size_t resp_len, u8 *resp) +{ + int i, ret; + u8 _resp[] = MKRESP(1); + u8 req[] = MKREQ(0x02, EC_READ, 1, 0); + + for (i = 0; i < resp_len; ++i, reg++) { + refill_req(req, ®, 1); + ret = gaokun_ec_read(ec, req, sizeof(_resp), _resp); + if (ret) + return ret; + extr_resp(&resp[i], _resp, 1); + } + + return 0; +} +EXPORT_SYMBOL_GPL(gaokun_ec_psy_multi_read); + +/* Smart charge */ +#define are_thresholds_valid(start, end) ((end != 0) && (start <= end) && (end <= 100)) +int gaokun_ec_psy_get_smart_charge(struct gaokun_ec *ec, + u8 data[GAOKUN_SMART_CHARGE_DATA_SIZE]) +{ + /* GBCM */ + u8 req[] = MKREQ(0x02, 0xE4, 0); + u8 resp[] = MKRESP(GAOKUN_SMART_CHARGE_DATA_SIZE); + int ret; + + ret = gaokun_ec_read(ec, req, sizeof(resp), resp); + if (ret) + return -EIO; + + extr_resp(data, resp, GAOKUN_SMART_CHARGE_DATA_SIZE); + + return 0; +} +EXPORT_SYMBOL_GPL(gaokun_ec_psy_get_smart_charge); + +int gaokun_ec_psy_set_smart_charge(struct gaokun_ec *ec, + u8 data[GAOKUN_SMART_CHARGE_DATA_SIZE]) +{ + /* SBCM */ + u8 req[] = MKREQ(0x02, 0XE3, GAOKUN_SMART_CHARGE_DATA_SIZE); + + if (!are_thresholds_valid(data[2], data[3])) + return -EINVAL; + + refill_req(req, data, GAOKUN_SMART_CHARGE_DATA_SIZE); + + return gaokun_ec_write(ec, req); +} +EXPORT_SYMBOL_GPL(gaokun_ec_psy_set_smart_charge); + +/* Smart charge enable */ +int gaokun_ec_psy_get_smart_charge_enable(struct gaokun_ec *ec, bool *on) +{ + /* GBAC */ + *on = 0; /* clear other 3 Bytes */ + return gaokun_ec_read_byte(ec, (u8 [])MKREQ(0x02, 0xE6, 0), (u8 *)on); +} +EXPORT_SYMBOL_GPL(gaokun_ec_psy_get_smart_charge_enable); + +int gaokun_ec_psy_set_smart_charge_enable(struct gaokun_ec *ec, bool on) +{ + /* SBAC */ + return gaokun_ec_write(ec, (u8 [])MKREQ(0x02, 0xE5, 1, on)); +} +EXPORT_SYMBOL_GPL(gaokun_ec_psy_set_smart_charge_enable); + +/* -------------------------------------------------------------------------- */ +/* API For UCSI */ + +int gaokun_ec_ucsi_read(struct gaokun_ec *ec, + u8 resp[GAOKUN_UCSI_READ_SIZE]) +{ + u8 req[] = MKREQ(0x03, 0xD5, 0); + u8 _resp[] = MKRESP(GAOKUN_UCSI_READ_SIZE); + int ret; + + ret = gaokun_ec_read(ec, req, sizeof(_resp), _resp); + if (ret) + return ret; + + extr_resp(resp, _resp, GAOKUN_UCSI_READ_SIZE); + return 0; +} +EXPORT_SYMBOL_GPL(gaokun_ec_ucsi_read); + +int gaokun_ec_ucsi_write(struct gaokun_ec *ec, + const u8 req[GAOKUN_UCSI_WRITE_SIZE]) +{ + u8 _req[] = MKREQ(0x03, 0xD4, GAOKUN_UCSI_WRITE_SIZE); + + + refill_req(_req, req, GAOKUN_UCSI_WRITE_SIZE); + + return gaokun_ec_write(ec, _req); +} +EXPORT_SYMBOL_GPL(gaokun_ec_ucsi_write); + +int gaokun_ec_ucsi_get_reg(struct gaokun_ec *ec, u8 *ureg) +{ + u8 req[] = MKREQ(0x03, 0xD3, 0); + u8 _resp[] = MKRESP(UCSI_REG_SIZE); + int ret; + + ret = gaokun_ec_read(ec, req, sizeof(_resp), _resp); + if (ret) + return ret; + + extr_resp(ureg, _resp, UCSI_REG_SIZE); + + return 0; +} +EXPORT_SYMBOL_GPL(gaokun_ec_ucsi_get_reg); + +int gaokun_ec_ucsi_pan_ack(struct gaokun_ec *ec, int port_id) +{ + u8 req[] = MKREQ(0x03, 0xD2, 1); + u8 data = 1 << port_id; + + if (port_id == GAOKUN_UCSI_NO_PORT_UPDATE) + data = 0; + + refill_req(req, &data, 1); + + return gaokun_ec_write(ec, req); +} +EXPORT_SYMBOL_GPL(gaokun_ec_ucsi_pan_ack); + +/* -------------------------------------------------------------------------- */ +/* EC Sysfs */ + +/* Fn lock */ +static int gaokun_ec_get_fn_lock(struct gaokun_ec *ec, bool *on) +{ + /* GFRS */ + u8 req[] = MKREQ(0x02, 0x6B, 0); + int ret; + u8 val; + + ret = gaokun_ec_read_byte(ec, req, &val); + if (ret) + return ret; + + if (val == EC_FN_LOCK_ON) + *on = true; + else if (val == EC_FN_LOCK_OFF) + *on = false; + else + return -EIO; + + return 0; +} + +static int gaokun_ec_set_fn_lock(struct gaokun_ec *ec, bool on) +{ + /* SFRS */ + u8 req[] = MKREQ(0x02, 0x6C, 1); + u8 data; + + if (on) + data = EC_FN_LOCK_ON; + else + data = EC_FN_LOCK_OFF; + + refill_req(req, &data, 1); + + return gaokun_ec_write(ec, req); +} + +static ssize_t fn_lock_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct gaokun_ec *ec = dev_get_drvdata(dev); + bool on; + int ret; + + ret = gaokun_ec_get_fn_lock(ec, &on); + if (ret) + return ret; + + return sysfs_emit(buf, "%d\n", on); +} + +static ssize_t fn_lock_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct gaokun_ec *ec = dev_get_drvdata(dev); + bool on; + int ret; + + if (kstrtobool(buf, &on)) + return -EINVAL; + + ret = gaokun_ec_set_fn_lock(ec, on); + if (ret) + return ret; + + return size; +} + +static DEVICE_ATTR_RW(fn_lock); + +static struct attribute *gaokun_ec_attrs[] = { + &dev_attr_fn_lock.attr, + NULL, +}; +ATTRIBUTE_GROUPS(gaokun_ec); + +/* Thermal Zone HwMon */ +/* Range from 0 to 0x2C, partial valid */ +static const u8 temp_reg[20] = {0x05, 0x07, 0x08, 0x0E, 0x0F, 0x12, 0x15, 0x1E, + 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, + 0x27, 0x28, 0x29, 0x2A}; + +static int gaokun_ec_get_temp(struct gaokun_ec *ec, u8 idx, int *temp) +{ + /* GTMP */ + u8 req[] = MKREQ(0x02, 0x61, 1, temp_reg[idx]); + u8 resp[] = MKRESP(sizeof(__le16)); + __le16 tmp; + int ret; + + ret = gaokun_ec_read(ec, req, sizeof(resp), resp); + if (ret) + return ret; + + extr_resp((u8 *)&tmp, resp, sizeof(tmp)); + *temp = le16_to_cpu(tmp) * 100; /* convert to HwMon's unit */ + + return 0; +} + +static ssize_t get_ec_tz_temp(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct gaokun_ec *ec = dev_get_drvdata(dev); + int idx, ret, temp; + + idx = (to_sensor_dev_attr(attr))->index - 1; + ret = gaokun_ec_get_temp(ec, idx, &temp); + if (ret) + return ret; + + return sysfs_emit(buf, "%d\n", temp); +} + +static ssize_t ec_tz_temp_label(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int idx = (to_sensor_dev_attr(attr))->index - 1; + + return sysfs_emit(buf, "EC Thermal Zone %2d Temperature\n", idx); +} + +static SENSOR_DEVICE_ATTR(temp1_input, 0444, get_ec_tz_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp1_label, 0444, ec_tz_temp_label, NULL, 1); +static SENSOR_DEVICE_ATTR(temp2_input, 0444, get_ec_tz_temp, NULL, 2); +static SENSOR_DEVICE_ATTR(temp2_label, 0444, ec_tz_temp_label, NULL, 2); +static SENSOR_DEVICE_ATTR(temp3_input, 0444, get_ec_tz_temp, NULL, 3); +static SENSOR_DEVICE_ATTR(temp3_label, 0444, ec_tz_temp_label, NULL, 3); +static SENSOR_DEVICE_ATTR(temp4_input, 0444, get_ec_tz_temp, NULL, 4); +static SENSOR_DEVICE_ATTR(temp4_label, 0444, ec_tz_temp_label, NULL, 4); +static SENSOR_DEVICE_ATTR(temp5_input, 0444, get_ec_tz_temp, NULL, 5); +static SENSOR_DEVICE_ATTR(temp5_label, 0444, ec_tz_temp_label, NULL, 5); +static SENSOR_DEVICE_ATTR(temp6_input, 0444, get_ec_tz_temp, NULL, 6); +static SENSOR_DEVICE_ATTR(temp6_label, 0444, ec_tz_temp_label, NULL, 6); +static SENSOR_DEVICE_ATTR(temp7_input, 0444, get_ec_tz_temp, NULL, 7); +static SENSOR_DEVICE_ATTR(temp7_label, 0444, ec_tz_temp_label, NULL, 7); +static SENSOR_DEVICE_ATTR(temp8_input, 0444, get_ec_tz_temp, NULL, 8); +static SENSOR_DEVICE_ATTR(temp8_label, 0444, ec_tz_temp_label, NULL, 8); +static SENSOR_DEVICE_ATTR(temp9_input, 0444, get_ec_tz_temp, NULL, 9); +static SENSOR_DEVICE_ATTR(temp9_label, 0444, ec_tz_temp_label, NULL, 9); +static SENSOR_DEVICE_ATTR(temp10_input, 0444, get_ec_tz_temp, NULL, 10); +static SENSOR_DEVICE_ATTR(temp10_label, 0444, ec_tz_temp_label, NULL, 10); +static SENSOR_DEVICE_ATTR(temp11_input, 0444, get_ec_tz_temp, NULL, 11); +static SENSOR_DEVICE_ATTR(temp11_label, 0444, ec_tz_temp_label, NULL, 11); +static SENSOR_DEVICE_ATTR(temp12_input, 0444, get_ec_tz_temp, NULL, 12); +static SENSOR_DEVICE_ATTR(temp12_label, 0444, ec_tz_temp_label, NULL, 12); +static SENSOR_DEVICE_ATTR(temp13_input, 0444, get_ec_tz_temp, NULL, 13); +static SENSOR_DEVICE_ATTR(temp13_label, 0444, ec_tz_temp_label, NULL, 13); +static SENSOR_DEVICE_ATTR(temp14_input, 0444, get_ec_tz_temp, NULL, 14); +static SENSOR_DEVICE_ATTR(temp14_label, 0444, ec_tz_temp_label, NULL, 14); +static SENSOR_DEVICE_ATTR(temp15_input, 0444, get_ec_tz_temp, NULL, 15); +static SENSOR_DEVICE_ATTR(temp15_label, 0444, ec_tz_temp_label, NULL, 15); +static SENSOR_DEVICE_ATTR(temp16_input, 0444, get_ec_tz_temp, NULL, 16); +static SENSOR_DEVICE_ATTR(temp16_label, 0444, ec_tz_temp_label, NULL, 16); +static SENSOR_DEVICE_ATTR(temp17_input, 0444, get_ec_tz_temp, NULL, 17); +static SENSOR_DEVICE_ATTR(temp17_label, 0444, ec_tz_temp_label, NULL, 17); +static SENSOR_DEVICE_ATTR(temp18_input, 0444, get_ec_tz_temp, NULL, 18); +static SENSOR_DEVICE_ATTR(temp18_label, 0444, ec_tz_temp_label, NULL, 18); +static SENSOR_DEVICE_ATTR(temp19_input, 0444, get_ec_tz_temp, NULL, 19); +static SENSOR_DEVICE_ATTR(temp19_label, 0444, ec_tz_temp_label, NULL, 19); +static SENSOR_DEVICE_ATTR(temp20_input, 0444, get_ec_tz_temp, NULL, 20); +static SENSOR_DEVICE_ATTR(temp20_label, 0444, ec_tz_temp_label, NULL, 20); + +static struct attribute *gaokun_ec_hwmon_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_label.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_label.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_label.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_label.dev_attr.attr, + &sensor_dev_attr_temp5_input.dev_attr.attr, + &sensor_dev_attr_temp5_label.dev_attr.attr, + &sensor_dev_attr_temp6_input.dev_attr.attr, + &sensor_dev_attr_temp6_label.dev_attr.attr, + &sensor_dev_attr_temp7_input.dev_attr.attr, + &sensor_dev_attr_temp7_label.dev_attr.attr, + &sensor_dev_attr_temp8_input.dev_attr.attr, + &sensor_dev_attr_temp8_label.dev_attr.attr, + &sensor_dev_attr_temp9_input.dev_attr.attr, + &sensor_dev_attr_temp9_label.dev_attr.attr, + &sensor_dev_attr_temp10_input.dev_attr.attr, + &sensor_dev_attr_temp10_label.dev_attr.attr, + &sensor_dev_attr_temp11_input.dev_attr.attr, + &sensor_dev_attr_temp11_label.dev_attr.attr, + &sensor_dev_attr_temp12_input.dev_attr.attr, + &sensor_dev_attr_temp12_label.dev_attr.attr, + &sensor_dev_attr_temp13_input.dev_attr.attr, + &sensor_dev_attr_temp13_label.dev_attr.attr, + &sensor_dev_attr_temp14_input.dev_attr.attr, + &sensor_dev_attr_temp14_label.dev_attr.attr, + &sensor_dev_attr_temp15_input.dev_attr.attr, + &sensor_dev_attr_temp15_label.dev_attr.attr, + &sensor_dev_attr_temp16_input.dev_attr.attr, + &sensor_dev_attr_temp16_label.dev_attr.attr, + &sensor_dev_attr_temp17_input.dev_attr.attr, + &sensor_dev_attr_temp17_label.dev_attr.attr, + &sensor_dev_attr_temp18_input.dev_attr.attr, + &sensor_dev_attr_temp18_label.dev_attr.attr, + &sensor_dev_attr_temp19_input.dev_attr.attr, + &sensor_dev_attr_temp19_label.dev_attr.attr, + &sensor_dev_attr_temp20_input.dev_attr.attr, + &sensor_dev_attr_temp20_label.dev_attr.attr, + NULL +}; +ATTRIBUTE_GROUPS(gaokun_ec_hwmon); + +/* -------------------------------------------------------------------------- */ +/* Modern Standby */ + +static int gaokun_ec_suspend(struct device *dev) +{ + struct gaokun_ec *ec = dev_get_drvdata(dev); + u8 req[] = MKREQ(0x02, 0xB2, 1, 0xDB); + int ret; + + if (ec->suspended) + return 0; + + ret = gaokun_ec_write(ec, req); + + if (ret) + return ret; + + ec->suspended = true; + + return 0; +} + +static int gaokun_ec_resume(struct device *dev) +{ + struct gaokun_ec *ec = dev_get_drvdata(dev); + u8 req[] = MKREQ(0x02, 0xB2, 1, 0xEB); + int ret; + int i; + + if (!ec->suspended) + return 0; + + for (i = 0; i < 3; ++i) { + ret = gaokun_ec_write(ec, req); + if (ret == 0) + break; + + msleep(100); /* EC need time to resume */ + }; + + ec->suspended = false; + + return 0; +} + +static void gaokun_aux_release(struct device *dev) +{ + struct auxiliary_device *adev = to_auxiliary_dev(dev); + + kfree(adev); +} + +static void gaokun_aux_remove(void *data) +{ + struct auxiliary_device *adev = data; + + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); +} + +static int gaokun_aux_init(struct device *parent, const char *name, + struct gaokun_ec *ec) +{ + struct auxiliary_device *adev; + int ret; + + adev = kzalloc(sizeof(*adev), GFP_KERNEL); + if (!adev) + return -ENOMEM; + + adev->name = name; + adev->id = 0; + adev->dev.parent = parent; + adev->dev.release = gaokun_aux_release; + adev->dev.platform_data = ec; + /* Allow aux devices to access parent's DT nodes directly */ + device_set_of_node_from_dev(&adev->dev, parent); + + ret = auxiliary_device_init(adev); + if (ret) { + kfree(adev); + return ret; + } + + ret = auxiliary_device_add(adev); + if (ret) { + auxiliary_device_uninit(adev); + return ret; + } + + return devm_add_action_or_reset(parent, gaokun_aux_remove, adev); +} + +/* -------------------------------------------------------------------------- */ +/* EC */ + +static irqreturn_t gaokun_ec_irq_handler(int irq, void *data) +{ + struct gaokun_ec *ec = data; + u8 req[] = MKREQ(EC_EVENT, EC_QUERY, 0); + u8 status, id; + int ret; + + ret = gaokun_ec_read_byte(ec, req, &id); + if (ret) + return IRQ_HANDLED; + + switch (id) { + case 0x0: /* No event */ + break; + + case EC_EVENT_LID: + gaokun_ec_psy_read_byte(ec, EC_LID_STATE, &status); + status = EC_LID_OPEN & status; + input_report_switch(ec->idev, SW_LID, !status); + input_sync(ec->idev); + break; + + default: + blocking_notifier_call_chain(&ec->notifier_list, id, ec); + } + + return IRQ_HANDLED; +} + +static int gaokun_ec_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct gaokun_ec *ec; + int ret; + + ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL); + if (!ec) + return -ENOMEM; + + mutex_init(&ec->lock); + ec->client = client; + i2c_set_clientdata(client, ec); + BLOCKING_INIT_NOTIFIER_HEAD(&ec->notifier_list); + + /* Lid switch */ + ec->idev = devm_input_allocate_device(dev); + if (!ec->idev) + return -ENOMEM; + + ec->idev->name = "LID"; + ec->idev->phys = "gaokun-ec/input0"; + input_set_capability(ec->idev, EV_SW, SW_LID); + + ret = input_register_device(ec->idev); + if (ret) + return dev_err_probe(dev, ret, "Failed to register input device\n"); + + ret = gaokun_aux_init(dev, "psy", ec); + if (ret) + return ret; + + ret = gaokun_aux_init(dev, "ucsi", ec); + if (ret) + return ret; + + ret = devm_request_threaded_irq(dev, client->irq, NULL, + gaokun_ec_irq_handler, IRQF_ONESHOT, + dev_name(dev), ec); + if (ret) + return dev_err_probe(dev, ret, "Failed to request irq\n"); + + ec->hwmon_dev = hwmon_device_register_with_groups(dev, "gaokun_ec_hwmon", + ec, gaokun_ec_hwmon_groups); + if (IS_ERR(ec->hwmon_dev)) { + dev_err(dev, "Failed to register hwmon device\n"); + return PTR_ERR(ec->hwmon_dev); + } + + return 0; +} + +static void gaokun_ec_remove(struct i2c_client *client) +{ + struct gaokun_ec *ec = i2c_get_clientdata(client); + hwmon_device_unregister(ec->hwmon_dev); +} + +static const struct i2c_device_id gaokun_ec_id[] = { + { "gaokun-ec", }, + { } +}; +MODULE_DEVICE_TABLE(i2c, gaokun_ec_id); + +static const struct of_device_id gaokun_ec_of_match[] = { + { .compatible = "huawei,gaokun-ec", }, + { } +}; +MODULE_DEVICE_TABLE(of, gaokun_ec_of_match); + +static const struct dev_pm_ops gaokun_ec_pm_ops = { + NOIRQ_SYSTEM_SLEEP_PM_OPS(gaokun_ec_suspend, gaokun_ec_resume) +}; + +static struct i2c_driver gaokun_ec_driver = { + .driver = { + .name = "gaokun-ec", + .of_match_table = gaokun_ec_of_match, + .pm = &gaokun_ec_pm_ops, + .dev_groups = gaokun_ec_groups, + }, + .probe = gaokun_ec_probe, + .remove = gaokun_ec_remove, + .id_table = gaokun_ec_id, +}; +module_i2c_driver(gaokun_ec_driver); + +MODULE_DESCRIPTION("HUAWEI Matebook E Go EC driver"); +MODULE_AUTHOR("Pengyu Luo "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_data/huawei-gaokun-ec.h b/include/linux/platform_data/huawei-gaokun-ec.h new file mode 100644 index 000000000..7a8d17391 --- /dev/null +++ b/include/linux/platform_data/huawei-gaokun-ec.h @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Huawei Matebook E Go Embedded Controller + * + * Copyright (C) 2024 Pengyu Luo + */ + +#ifndef __HUAWEI_GAOKUN_EC_H__ +#define __HUAWEI_GAOKUN_EC_H__ + +#define GAOKUN_UCSI_CCI_SIZE 4 +#define GAOKUN_UCSI_DATA_SIZE 16 +#define GAOKUN_UCSI_READ_SIZE (GAOKUN_UCSI_CCI_SIZE + GAOKUN_UCSI_DATA_SIZE) +#define GAOKUN_UCSI_WRITE_SIZE 0x18 + +#define GAOKUN_UCSI_NO_PORT_UPDATE (-1) + +#define GAOKUN_SMART_CHARGE_DATA_SIZE 4 /* mode, delay, start, end */ + +/* -------------------------------------------------------------------------- */ + +struct gaokun_ec; +struct notifier_block; + +#define GAOKUN_MOD_NAME "huawei_gaokun_ec" +#define GAOKUN_DEV_PSY "psy" +#define GAOKUN_DEV_UCSI "ucsi" + +/* -------------------------------------------------------------------------- */ +/* Common API */ + +int gaokun_ec_register_notify(struct gaokun_ec *ec, + struct notifier_block *nb); +void gaokun_ec_unregister_notify(struct gaokun_ec *ec, + struct notifier_block *nb); + +int gaokun_ec_read(struct gaokun_ec *ec, const u8 *req, + size_t resp_len, u8 *resp); +int gaokun_ec_write(struct gaokun_ec *ec, u8 *req); +int gaokun_ec_read_byte(struct gaokun_ec *ec, u8 *req, u8 *byte); + +/* -------------------------------------------------------------------------- */ +/* API For PSY */ + +int gaokun_ec_psy_multi_read(struct gaokun_ec *ec, u8 reg, + size_t resp_len, u8 *resp); + +static inline int gaokun_ec_psy_read_byte(struct gaokun_ec *ec, + u8 reg, u8 *byte) +{ + return gaokun_ec_psy_multi_read(ec, reg, sizeof(*byte), byte); +} + +static inline int gaokun_ec_psy_read_word(struct gaokun_ec *ec, + u8 reg, u16 *word) +{ + return gaokun_ec_psy_multi_read(ec, reg, sizeof(*word), (u8 *)word); +} + +int gaokun_ec_psy_get_smart_charge(struct gaokun_ec *ec, + u8 data[GAOKUN_SMART_CHARGE_DATA_SIZE]); +int gaokun_ec_psy_set_smart_charge(struct gaokun_ec *ec, + u8 data[GAOKUN_SMART_CHARGE_DATA_SIZE]); + +int gaokun_ec_psy_get_smart_charge_enable(struct gaokun_ec *ec, bool *on); +int gaokun_ec_psy_set_smart_charge_enable(struct gaokun_ec *ec, bool on); + +/* -------------------------------------------------------------------------- */ +/* API For UCSI */ + +int gaokun_ec_ucsi_read(struct gaokun_ec *ec, u8 resp[GAOKUN_UCSI_READ_SIZE]); +int gaokun_ec_ucsi_write(struct gaokun_ec *ec, + const u8 req[GAOKUN_UCSI_WRITE_SIZE]); + +int gaokun_ec_ucsi_get_reg(struct gaokun_ec *ec, u8 *ureg); +int gaokun_ec_ucsi_pan_ack(struct gaokun_ec *ec, int port_id); + + +#endif /* __HUAWEI_GAOKUN_EC_H__ */