| Message ID | 20201119100331.2594-2-xiang.ye@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | add custom hinge sensor support | expand |
On Thu, 19 Nov 2020 18:03:28 +0800 Ye Xiang <xiang.ye@intel.com> wrote: > Currently custom sensors properties are not decoded and it is up to > user space to interpret. > > Some manufacturers already standardized the meaning of some custom sensors. > They can be presented as a proper IIO sensor. We can identify these sensors > based on manufacturer and serial number property in the report. > > This change is identifying hinge sensor when the manufacturer is "INTEL". > This creates a platform device so that a sensor driver can be loaded to > process these sensors. > > Signed-off-by: Ye Xiang <xiang.ye@intel.com> Hi Ye Xiang, Various comments inline. Thanks, Jonathan > --- > drivers/hid/hid-sensor-custom.c | 170 ++++++++++++++++++++++++++++++++ > include/linux/hid-sensor-ids.h | 39 ++++++++ > 2 files changed, 209 insertions(+) > > diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c > index 4d25577a8573..bb96d9c09daf 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 +52,8 @@ struct hid_sensor_custom { > struct kfifo data_fifo; > unsigned long misc_opened; > wait_queue_head_t wait; > + struct platform_device *custom_pdev; > + bool custom_pdev_exposed; > }; > > /* Header for each sample to user space via dev interface */ > @@ -746,11 +750,159 @@ static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom > > } > > +/* > + * use sensors luid which is defined in FW, such as ISH, > + * to identify sensor. > + */ const? > +static char *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 -1; > +} > + > +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; > + u16 *w_buf; > + int w_buf_len; > + char *buf; > + int buf_len; > + int i; > + int index; > + > + w_buf_len = sizeof(u16) * HID_CUSTOM_MAX_FEATURE_BYTES; > + buf_len = sizeof(char) * HID_CUSTOM_MAX_FEATURE_BYTES; Given these are compile time values, these two could just go directly above with no loss of readability. int w_buf_len = siezof(u16)... > + w_buf = kzalloc(w_buf_len, GFP_KERNEL); > + if (!w_buf) > + return -1; Better to return meaningful error values and if the error isn't just 'didn't find it' - probably -ENODEV and we should check that was the cause of the problem at the call site for this function. If it was a memory allocation error we should quit out instead of trying something else. > + > + buf = kzalloc(buf_len, GFP_KERNEL); > + if (!buf) { > + kfree(w_buf); Given we have error handling for this below, better to be consistent and use a goto + an additional error label for htis case. > + return -1; > + } > + > + /* 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) From HID point of view, is that allowed to fail? Probably best to add a comment to say if it is or isn't. I'd like to be able to read this code and know which of these error paths just means we don't have a matching sensor. > + goto err_out; > + > + report_size = > + sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, > + sensor_manufacturer.index, w_buf_len, > + w_buf); > + if (report_size <= 0) { > + hid_err(hsdev->hdev, > + "Failed to get sensor manufacturer info %d\n", > + report_size); > + goto err_out; > + } > + > + /* convert from wide char to char */ > + for (i = 0; i < buf_len - 1 && w_buf[i]; i++) > + buf[i] = (char)w_buf[i]; > + > + /* ensure it's ISH sensor */ > + if (strncmp(buf, "INTEL", strlen("INTEL"))) > + goto err_out; > + > + memset(w_buf, 0, w_buf_len); > + memset(buf, 0, buf_len); > + > + /* 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) > + goto err_out; > + > + report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, > + sensor_luid_info.index, w_buf_len, > + w_buf); > + if (report_size <= 0) { > + hid_err(hsdev->hdev, "Failed to get real usage info %d\n", > + report_size); > + goto err_out; > + } > + > + /* convert from wide char to char */ > + for (i = 0; i < buf_len - 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])); > + goto err_out; > + } > + > + /* get table index with luid (not matching 'LUID: ' in luid) */ > + index = get_luid_table_index(&buf[5]); Nicer to share the code block here with the error / unwind path below. Particular as index might be -1 and hence an error. > + kfree(w_buf); > + kfree(buf); > + return index; > + > +err_out: > + kfree(w_buf); > + kfree(buf); > + return -1; > +} > + > +static struct platform_device * > +register_platform_device(struct platform_device *pdev, Function needs a prefix as that sounds very generic. When I saw it below, I assumed it was a generic call not one in this file. > + 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; > + int ret; > + > + /* 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 NULL; > + > + custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, > + PLATFORM_DEVID_NONE, hsdev, > + sizeof(*hsdev)); > + kfree(dev_name); > + ret = PTR_ERR_OR_ZERO(custom_pdev); > + if (ret) { > + dev_err(&pdev->dev, "platform_device_register_data failed ret:%d\n", ret); > + return NULL; > + } > + > + 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 +916,19 @@ 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) { > + sensor_inst->custom_pdev = > + register_platform_device(pdev, hsdev, index); > + if (sensor_inst->custom_pdev) { > + sensor_inst->custom_pdev_exposed = true; > + return 0; > + } > + > + dev_err(&pdev->dev, "register_platform_device failed\n"); This feels like somewhat odd logic. We aren't looking at a fallback for something that is expected to fail so it doesn't make sense to carry on. > + } > + > ret = sensor_hub_register_callback(hsdev, hsdev->usage, > &sensor_inst->callbacks); > if (ret < 0) { > @@ -802,6 +967,11 @@ 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_exposed) { > + 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, > diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h > index 530c09f3e64a..46db3056f04b 100644 > --- a/include/linux/hid-sensor-ids.h > +++ b/include/linux/hid-sensor-ids.h > @@ -128,6 +128,10 @@ > #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > > /* Common selectors */ > +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 > +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 > +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 > +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 > #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 > @@ -159,4 +163,39 @@ > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 > > +/* Custom Sensor (2000e1) */ > +#define HID_USAGE_SENSOR_HINGE 0x20020B > +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 > +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 Given these are all defined in a block could we use a macro? HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) 0x200543 + (x) perhaps? I'm not sure what the preferred convention is in this file. > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F > + > #endif
On Sat, Nov 21, 2020 at 05:21:27PM +0000, Jonathan Cameron wrote: > On Thu, 19 Nov 2020 18:03:28 +0800 > Ye Xiang <xiang.ye@intel.com> wrote: > > > Currently custom sensors properties are not decoded and it is up to > > user space to interpret. > > > > Some manufacturers already standardized the meaning of some custom sensors. > > They can be presented as a proper IIO sensor. We can identify these sensors > > based on manufacturer and serial number property in the report. > > > > This change is identifying hinge sensor when the manufacturer is "INTEL". > > This creates a platform device so that a sensor driver can be loaded to > > process these sensors. > > > > Signed-off-by: Ye Xiang <xiang.ye@intel.com> > > Hi Ye Xiang, > > Various comments inline. > > Thanks, > > Jonathan Thanks for review and comments Xiang > > > --- > > drivers/hid/hid-sensor-custom.c | 170 ++++++++++++++++++++++++++++++++ > > include/linux/hid-sensor-ids.h | 39 ++++++++ > > 2 files changed, 209 insertions(+) > > > > diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c > > index 4d25577a8573..bb96d9c09daf 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 +52,8 @@ struct hid_sensor_custom { > > struct kfifo data_fifo; > > unsigned long misc_opened; > > wait_queue_head_t wait; > > + struct platform_device *custom_pdev; > > + bool custom_pdev_exposed; > > }; > > > > /* Header for each sample to user space via dev interface */ > > @@ -746,11 +750,159 @@ static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom > > > > } > > > > +/* > > + * use sensors luid which is defined in FW, such as ISH, > > + * to identify sensor. > > + */ > > const? yes, it shoud be const. > > > +static char *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 -1; > > +} > > + > > +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; > > + u16 *w_buf; > > + int w_buf_len; > > + char *buf; > > + int buf_len; > > + int i; > > + int index; > > + > > + w_buf_len = sizeof(u16) * HID_CUSTOM_MAX_FEATURE_BYTES; > > + buf_len = sizeof(char) * HID_CUSTOM_MAX_FEATURE_BYTES; > Given these are compile time values, these two could just go > directly above with no loss of readability. > > int w_buf_len = siezof(u16)... got it > > > + w_buf = kzalloc(w_buf_len, GFP_KERNEL); > > + if (!w_buf) > > + return -1; > > Better to return meaningful error values and if the error > isn't just 'didn't find it' - probably -ENODEV and we should check that > was the cause of the problem at the call site for this function. > If it was a memory allocation error we should quit out instead of trying > something else. agree, will use -ENODEV, when "didn't find it"; use -ENOMEM when alloc failed. > > > + > > + buf = kzalloc(buf_len, GFP_KERNEL); > > + if (!buf) { > > + kfree(w_buf); > Given we have error handling for this below, better to be consistent > and use a goto + an additional error label for htis case. ok, will add additional error label to make it consistent. > > > + return -1; > > + } > > + > > + /* 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) > > From HID point of view, is that allowed to fail? Probably best to add > a comment to say if it is or isn't. > I'd like to be able to read this code and know which of these error paths > just means we don't have a matching sensor. This is error checking of sensor_hub_input_get_attribute_info. If error, will return the return value of sensor_hub_input_get_attribute_info in next version patch. > > > + goto err_out; > > + > > + report_size = > > + sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, > > + sensor_manufacturer.index, w_buf_len, > > + w_buf); > > + if (report_size <= 0) { > > + hid_err(hsdev->hdev, > > + "Failed to get sensor manufacturer info %d\n", > > + report_size); > > + goto err_out; > > + } > > + > > + /* convert from wide char to char */ > > + for (i = 0; i < buf_len - 1 && w_buf[i]; i++) > > + buf[i] = (char)w_buf[i]; > > + > > + /* ensure it's ISH sensor */ > > + if (strncmp(buf, "INTEL", strlen("INTEL"))) > > + goto err_out; > > + > > + memset(w_buf, 0, w_buf_len); > > + memset(buf, 0, buf_len); > > + > > + /* 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) > > + goto err_out; > > + > > + report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, > > + sensor_luid_info.index, w_buf_len, > > + w_buf); > > + if (report_size <= 0) { > > + hid_err(hsdev->hdev, "Failed to get real usage info %d\n", > > + report_size); > > + goto err_out; > > + } > > + > > + /* convert from wide char to char */ > > + for (i = 0; i < buf_len - 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])); > > + goto err_out; > > + } > > + > > + /* get table index with luid (not matching 'LUID: ' in luid) */ > > + index = get_luid_table_index(&buf[5]); > > Nicer to share the code block here with the error / unwind path below. > Particular as index might be -1 and hence an error. ok, will try to share it with error out. > > > + kfree(w_buf); > > + kfree(buf); > > + return index; > > + > > +err_out: > > + kfree(w_buf); > > + kfree(buf); > > + return -1; > > +} > > + > > +static struct platform_device * > > +register_platform_device(struct platform_device *pdev, > > Function needs a prefix as that sounds very generic. > When I saw it below, I assumed it was a generic call not > one in this file. got it. > > > + 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; > > + int ret; > > + > > + /* 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 NULL; > > + > > + custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, > > + PLATFORM_DEVID_NONE, hsdev, > > + sizeof(*hsdev)); > > + kfree(dev_name); > > + ret = PTR_ERR_OR_ZERO(custom_pdev); > > + if (ret) { > > + dev_err(&pdev->dev, "platform_device_register_data failed ret:%d\n", ret); > > + return NULL; > > + } > > + > > + 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 +916,19 @@ 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) { > > + sensor_inst->custom_pdev = > > + register_platform_device(pdev, hsdev, index); > > + if (sensor_inst->custom_pdev) { > > + sensor_inst->custom_pdev_exposed = true; > > + return 0; > > + } > > + > > + dev_err(&pdev->dev, "register_platform_device failed\n"); > > This feels like somewhat odd logic. We aren't looking at a fallback for > something that is expected to fail so it doesn't make sense to carry > on. agree, will change to: if register platform failed, then return error code. > > > > + } > > + > > ret = sensor_hub_register_callback(hsdev, hsdev->usage, > > &sensor_inst->callbacks); > > if (ret < 0) { > > @@ -802,6 +967,11 @@ 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_exposed) { > > + 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, > > diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h > > index 530c09f3e64a..46db3056f04b 100644 > > --- a/include/linux/hid-sensor-ids.h > > +++ b/include/linux/hid-sensor-ids.h > > @@ -128,6 +128,10 @@ > > #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > > > > /* Common selectors */ > > +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 > > +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 > > +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 > > +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 > > #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 > > @@ -159,4 +163,39 @@ > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 > > > > +/* Custom Sensor (2000e1) */ > > +#define HID_USAGE_SENSOR_HINGE 0x20020B > > +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 > > +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 > Given these are all defined in a block could we use a macro? > HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) 0x200543 + (x) > > perhaps? > > I'm not sure what the preferred convention is in this file. If using HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x), we should give a range to x, like (1<x<28). How to ensure the x is in the range? It can be an issue when someone using x out of the range. Thanks Xiang > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F > > + > > #endif >
Hi ... > > > sysfs_remove_group(&sensor_inst->pdev->dev.kobj, > > > diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h > > > index 530c09f3e64a..46db3056f04b 100644 > > > --- a/include/linux/hid-sensor-ids.h > > > +++ b/include/linux/hid-sensor-ids.h > > > @@ -128,6 +128,10 @@ > > > #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > > > > > > /* Common selectors */ > > > +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 > > > +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 > > > +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 > > > +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 > > > #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 > > > @@ -159,4 +163,39 @@ > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 > > > > > > +/* Custom Sensor (2000e1) */ > > > +#define HID_USAGE_SENSOR_HINGE 0x20020B > > > +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 > > > +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 > > Given these are all defined in a block could we use a macro? > > HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) 0x200543 + (x) > > > > perhaps? > > > > I'm not sure what the preferred convention is in this file. > If using HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x), we should give a range to x, like (1<x<28). > How to ensure the x is in the range? It can be an issue when someone using x out of the range. It can be done via build time checking. https://elixir.bootlin.com/linux/latest/source/include/linux/build_bug.h#L49 Normally we wouldn't bother and would rely on review to pick up on this but I'd have no problem with a paranoid check in the macro. Particularly as 28 isn't exactly and obvious number to support! > > Thanks > Xiang > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F > > > + > > > #endif > >
On Tue, Nov 24, 2020 at 11:32:11AM +0000, Jonathan Cameron wrote: > Hi > ... > > > > sysfs_remove_group(&sensor_inst->pdev->dev.kobj, > > > > diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h > > > > index 530c09f3e64a..46db3056f04b 100644 > > > > --- a/include/linux/hid-sensor-ids.h > > > > +++ b/include/linux/hid-sensor-ids.h > > > > @@ -128,6 +128,10 @@ > > > > #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > > > > > > > > /* Common selectors */ > > > > +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 > > > > +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 > > > > +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 > > > > +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 > > > > #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E > > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F > > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 > > > > @@ -159,4 +163,39 @@ > > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 > > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 > > > > > > > > +/* Custom Sensor (2000e1) */ > > > > +#define HID_USAGE_SENSOR_HINGE 0x20020B > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 > > > > +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 > > > Given these are all defined in a block could we use a macro? > > > HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) 0x200543 + (x) > > > > > > perhaps? > > > > > > I'm not sure what the preferred convention is in this file. > > If using HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x), we should give a range to x, like (1<x<28). > > How to ensure the x is in the range? It can be an issue when someone using x out of the range. > > It can be done via build time checking. > https://elixir.bootlin.com/linux/latest/source/include/linux/build_bug.h#L49 > Normally we wouldn't bother and would rely on review to pick up on this but > I'd have no problem with a paranoid check in the macro. Particularly as 28 isn't > exactly and obvious number to support! Because HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE is used as case condition, we cannot use Build_BUG_ON in the macro like below. #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) \ ({ \ BUILD_BUG_ON(x > 28); \ BUILD_BUG_ON(x < 0); \ (HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE + (x)); \ }) I can use the define with a comments to declear the range of x. #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE 0x200543 /* Custom Sensor data 28=>x>=0 */ #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) \ (HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE + (x)) Thanks Ye, Xiang > > > > > Thanks > > Xiang > > > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F > > > > + > > > > #endif > > > >
On Wed, 25 Nov 2020 10:27:21 +0800 "Ye, Xiang" <xiang.ye@intel.com> wrote: > On Tue, Nov 24, 2020 at 11:32:11AM +0000, Jonathan Cameron wrote: > > Hi > > ... > > > > > sysfs_remove_group(&sensor_inst->pdev->dev.kobj, > > > > > diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h > > > > > index 530c09f3e64a..46db3056f04b 100644 > > > > > --- a/include/linux/hid-sensor-ids.h > > > > > +++ b/include/linux/hid-sensor-ids.h > > > > > @@ -128,6 +128,10 @@ > > > > > #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > > > > > > > > > > /* Common selectors */ > > > > > +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 > > > > > +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 > > > > > +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 > > > > > +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 > > > > > #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E > > > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F > > > > > #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 > > > > > @@ -159,4 +163,39 @@ > > > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 > > > > > #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 > > > > > > > > > > +/* Custom Sensor (2000e1) */ > > > > > +#define HID_USAGE_SENSOR_HINGE 0x20020B > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 > > > > Given these are all defined in a block could we use a macro? > > > > HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) 0x200543 + (x) > > > > > > > > perhaps? > > > > > > > > I'm not sure what the preferred convention is in this file. > > > If using HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x), we should give a range to x, like (1<x<28). > > > How to ensure the x is in the range? It can be an issue when someone using x out of the range. > > > > It can be done via build time checking. > > https://elixir.bootlin.com/linux/latest/source/include/linux/build_bug.h#L49 > > Normally we wouldn't bother and would rely on review to pick up on this but > > I'd have no problem with a paranoid check in the macro. Particularly as 28 isn't > > exactly and obvious number to support! > Because HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE is used as case condition, we cannot use > Build_BUG_ON in the macro like below. > #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) \ > ({ \ > BUILD_BUG_ON(x > 28); \ > BUILD_BUG_ON(x < 0); \ > (HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE + (x)); \ > }) Ah. I'd missed the case condition element. Good point! > > I can use the define with a comments to declear the range of x. > #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE 0x200543 > /* Custom Sensor data 28=>x>=0 */ > #define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(x) \ > (HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_BASE + (x)) > Sounds good to me. Thanks, Jonathan > Thanks > Ye, Xiang > > > > > > > > Thanks > > > Xiang > > > > > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E > > > > > +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F > > > > > + > > > > > #endif > > > > > >
diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c index 4d25577a8573..bb96d9c09daf 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 +52,8 @@ struct hid_sensor_custom { struct kfifo data_fifo; unsigned long misc_opened; wait_queue_head_t wait; + struct platform_device *custom_pdev; + bool custom_pdev_exposed; }; /* Header for each sample to user space via dev interface */ @@ -746,11 +750,159 @@ static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom } +/* + * use sensors luid which is defined in FW, such as ISH, + * to identify sensor. + */ +static char *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 -1; +} + +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; + u16 *w_buf; + int w_buf_len; + char *buf; + int buf_len; + int i; + int index; + + w_buf_len = sizeof(u16) * HID_CUSTOM_MAX_FEATURE_BYTES; + buf_len = sizeof(char) * HID_CUSTOM_MAX_FEATURE_BYTES; + w_buf = kzalloc(w_buf_len, GFP_KERNEL); + if (!w_buf) + return -1; + + buf = kzalloc(buf_len, GFP_KERNEL); + if (!buf) { + kfree(w_buf); + return -1; + } + + /* 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) + goto err_out; + + report_size = + sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, + sensor_manufacturer.index, w_buf_len, + w_buf); + if (report_size <= 0) { + hid_err(hsdev->hdev, + "Failed to get sensor manufacturer info %d\n", + report_size); + goto err_out; + } + + /* convert from wide char to char */ + for (i = 0; i < buf_len - 1 && w_buf[i]; i++) + buf[i] = (char)w_buf[i]; + + /* ensure it's ISH sensor */ + if (strncmp(buf, "INTEL", strlen("INTEL"))) + goto err_out; + + memset(w_buf, 0, w_buf_len); + memset(buf, 0, buf_len); + + /* 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) + goto err_out; + + report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, + sensor_luid_info.index, w_buf_len, + w_buf); + if (report_size <= 0) { + hid_err(hsdev->hdev, "Failed to get real usage info %d\n", + report_size); + goto err_out; + } + + /* convert from wide char to char */ + for (i = 0; i < buf_len - 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])); + goto err_out; + } + + /* get table index with luid (not matching 'LUID: ' in luid) */ + index = get_luid_table_index(&buf[5]); + kfree(w_buf); + kfree(buf); + return index; + +err_out: + kfree(w_buf); + kfree(buf); + return -1; +} + +static struct platform_device * +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; + int ret; + + /* 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 NULL; + + custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, + PLATFORM_DEVID_NONE, hsdev, + sizeof(*hsdev)); + kfree(dev_name); + ret = PTR_ERR_OR_ZERO(custom_pdev); + if (ret) { + dev_err(&pdev->dev, "platform_device_register_data failed ret:%d\n", ret); + return NULL; + } + + 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 +916,19 @@ 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) { + sensor_inst->custom_pdev = + register_platform_device(pdev, hsdev, index); + if (sensor_inst->custom_pdev) { + sensor_inst->custom_pdev_exposed = true; + return 0; + } + + dev_err(&pdev->dev, "register_platform_device failed\n"); + } + ret = sensor_hub_register_callback(hsdev, hsdev->usage, &sensor_inst->callbacks); if (ret < 0) { @@ -802,6 +967,11 @@ 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_exposed) { + 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, diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h index 530c09f3e64a..46db3056f04b 100644 --- a/include/linux/hid-sensor-ids.h +++ b/include/linux/hid-sensor-ids.h @@ -128,6 +128,10 @@ #define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 /* Common selectors */ +#define HID_USAGE_SENSOR_PROP_DESC 0x200300 +#define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 +#define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 +#define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310 @@ -159,4 +163,39 @@ #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM 0x200840 #define HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM 0x200841 +/* Custom Sensor (2000e1) */ +#define HID_USAGE_SENSOR_HINGE 0x20020B +#define HID_USAGE_SENSOR_DATA_FIELD_LOCATION 0x200400 +#define HID_USAGE_SENSOR_DATA_FIELE_TIME_SINCE_SYS_BOOT 0x20052B +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_USAGE 0x200541 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE 0x200543 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_1 0x200544 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_2 0x200545 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_3 0x200546 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_4 0x200547 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_5 0x200548 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_6 0x200549 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_7 0x20054A +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_8 0x20054B +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_9 0x20054C +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_10 0x20054D +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_11 0x20054E +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_12 0x20054F +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_13 0x200550 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_14 0x200551 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_15 0x200552 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_16 0x200553 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_17 0x200554 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_18 0x200555 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_19 0x200556 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_20 0x200557 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_21 0x200558 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_22 0x200559 +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_23 0x20055A +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_24 0x20055B +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_25 0x20055C +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_26 0x20055D +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_27 0x20055E +#define HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE_28 0x20055F + #endif
Currently custom sensors properties are not decoded and it is up to user space to interpret. Some manufacturers already standardized the meaning of some custom sensors. They can be presented as a proper IIO sensor. We can identify these sensors based on manufacturer and serial number property in the report. This change is identifying hinge sensor when the manufacturer is "INTEL". This creates a platform device so that a sensor driver can be loaded to process these sensors. Signed-off-by: Ye Xiang <xiang.ye@intel.com> --- drivers/hid/hid-sensor-custom.c | 170 ++++++++++++++++++++++++++++++++ include/linux/hid-sensor-ids.h | 39 ++++++++ 2 files changed, 209 insertions(+)