diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/hid/hid-sensor-custom.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c index 4d25577a8573..2628bc53ed80 100644 --- a/drivers/hid/hid-sensor-custom.c +++ b/drivers/hid/hid-sensor-custom.c @@ -4,6 +4,7 @@ * Copyright (c) 2015, Intel Corporation. */ +#include <linux/ctype.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> @@ -21,6 +22,7 @@ #define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1) #define HID_CUSTOM_FIFO_SIZE 4096 #define HID_CUSTOM_MAX_FEATURE_BYTES 64 +#define HID_SENSOR_USAGE_LENGTH (4 + 1) struct hid_sensor_custom_field { int report_id; @@ -50,6 +52,7 @@ struct hid_sensor_custom { struct kfifo data_fifo; unsigned long misc_opened; wait_queue_head_t wait; + struct platform_device *custom_pdev; }; /* Header for each sample to user space via dev interface */ @@ -746,11 +749,130 @@ static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom } +/* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */ +static const char *const known_sensor_luid[] = { "020B000000000000" }; + +static int get_luid_table_index(unsigned char *usage_str) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) { + if (!strncmp(usage_str, known_sensor_luid[i], + strlen(known_sensor_luid[i]))) + return i; + } + + return -ENODEV; +} + +static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev) +{ + struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 }; + struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 }; + int report_size; + int ret; + static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES]; + static char buf[HID_CUSTOM_MAX_FEATURE_BYTES]; + int i; + + memset(w_buf, 0, sizeof(w_buf)); + memset(buf, 0, sizeof(buf)); + + /* get manufacturer info */ + ret = sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, hsdev->usage, + HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer); + if (ret < 0) + return ret; + + report_size = + sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, + sensor_manufacturer.index, sizeof(w_buf), + w_buf); + if (report_size <= 0) { + hid_err(hsdev->hdev, + "Failed to get sensor manufacturer info %d\n", + report_size); + return -ENODEV; + } + + /* convert from wide char to char */ + for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) + buf[i] = (char)w_buf[i]; + + /* ensure it's ISH sensor */ + if (strncmp(buf, "INTEL", strlen("INTEL"))) + return -ENODEV; + + memset(w_buf, 0, sizeof(w_buf)); + memset(buf, 0, sizeof(buf)); + + /* get real usage id */ + ret = sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, hsdev->usage, + HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info); + if (ret < 0) + return ret; + + report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, + sensor_luid_info.index, sizeof(w_buf), + w_buf); + if (report_size <= 0) { + hid_err(hsdev->hdev, "Failed to get real usage info %d\n", + report_size); + return -ENODEV; + } + + /* convert from wide char to char */ + for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) + buf[i] = (char)w_buf[i]; + + if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) { + hid_err(hsdev->hdev, + "%s luid length not match %zu != (%zu + 5)\n", __func__, + strlen(buf), strlen(known_sensor_luid[0])); + return -ENODEV; + } + + /* get table index with luid (not matching 'LUID: ' in luid) */ + return get_luid_table_index(&buf[5]); +} + +static struct platform_device * +hid_sensor_register_platform_device(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + int index) +{ + char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 }; + struct platform_device *custom_pdev; + const char *dev_name; + char *c; + + /* copy real usage id */ + memcpy(real_usage, known_sensor_luid[index], 4); + + /* usage id are all lowcase */ + for (c = real_usage; *c != '\0'; c++) + *c = tolower(*c); + + /* HID-SENSOR-INT-REAL_USAGE_ID */ + dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage); + if (!dev_name) + return ERR_PTR(-ENOMEM); + + custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, + PLATFORM_DEVID_NONE, hsdev, + sizeof(*hsdev)); + kfree(dev_name); + return custom_pdev; +} + static int hid_sensor_custom_probe(struct platform_device *pdev) { struct hid_sensor_custom *sensor_inst; struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; int ret; + int index; sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst), GFP_KERNEL); @@ -764,6 +886,22 @@ static int hid_sensor_custom_probe(struct platform_device *pdev) sensor_inst->pdev = pdev; mutex_init(&sensor_inst->mutex); platform_set_drvdata(pdev, sensor_inst); + + index = get_known_custom_sensor_index(hsdev); + if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) { + sensor_inst->custom_pdev = + hid_sensor_register_platform_device(pdev, hsdev, index); + + ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev); + if (ret) { + dev_err(&pdev->dev, + "register_platform_device failed\n"); + return ret; + } + + return 0; + } + ret = sensor_hub_register_callback(hsdev, hsdev->usage, &sensor_inst->callbacks); if (ret < 0) { @@ -802,6 +940,11 @@ static int hid_sensor_custom_remove(struct platform_device *pdev) struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev); struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + if (sensor_inst->custom_pdev) { + platform_device_unregister(sensor_inst->custom_pdev); + return 0; + } + hid_sensor_custom_dev_if_remove(sensor_inst); hid_sensor_custom_remove_attributes(sensor_inst); sysfs_remove_group(&sensor_inst->pdev->dev.kobj, |