It is Jiri Kosina's review list. But he wanted first look from IIO folks. Thanks, Srinivas -----Original Message----- From: Jonathan Cameron [mailto:jic23@xxxxxxxxxx] Sent: Monday, August 06, 2012 3:35 AM To: Pandruvada, Srinivas Cc: linux-iio Subject: Re: [PATCH 4/9] HID-Sensors: Sensor framework On 02/08/2012 05:28, srinivas pandruvada wrote: > Adding processing for HID Sensor usage table as defined by HID 1.12, > Request #: HUTRR39, dated 05 May, 2011. > This driver uses HID driver framework to register, send and receive > events. > This uses MFD framework, so that actual processing for a specific > usage id can be done in a different driver. For example an > accelerometer driver can be a separate driver and use the interface > provided by this driver to register for events. This needs positive responses form the hid (and possibly mfd) side of things. As ever my work email client has messed with the white space. grr. Anyhow, based on a fairly superficial look this is fine as far as I can see. Time to actually get back to the day job ;) > > Signed-off-by: srinivas pandruvada <srinivas.pandruvada@xxxxxxxxx> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> > --- > drivers/hid/Kconfig | 14 + > drivers/hid/Makefile | 1 + > drivers/hid/hid-sensor-hub.c | 681 ++++++++++++++++++++++++++++++++++++++++ > include/linux/hid-sensor-hub.h | 160 ++++++++++ > include/linux/hid-sensor-ids.h | 111 +++++++ > 5 files changed, 967 insertions(+), 0 deletions(-) > create mode 100644 drivers/hid/hid-sensor-hub.c > create mode 100644 include/linux/hid-sensor-hub.h > create mode 100644 include/linux/hid-sensor-ids.h > > diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index > bef04c1..a9fd774 100644 > --- a/drivers/hid/Kconfig > +++ b/drivers/hid/Kconfig > @@ -653,6 +653,20 @@ config HID_ZYDACRON > ---help--- > Support for Zydacron remote control. > > +config HID_SENSOR_HUB > + tristate "HID Sensors framework support" > + depends on USB_HID > + select MFD_CORE > + default n > + -- help--- > + Support for HID Sensor framework. This creates a MFD instance > + for a sensor hub and identifies all the sensors connected to it. > + Each sensor is registered as a MFD cell, so that sensor specific > + processing can be done in a separate driver. Each sensor > + drivers can use the service provided by this driver to register > + for events and handle data streams. Each sensor driver can format > + data and present to user mode using input or IIO interface. > + > endmenu > > endif # HID > diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index > ca6cc9f..08f9d8f 100644 > --- a/drivers/hid/Makefile > +++ b/drivers/hid/Makefile > @@ -87,6 +87,7 @@ obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o > obj-$(CONFIG_HID_WACOM) += hid-wacom.o > obj-$(CONFIG_HID_WALTOP) += hid-waltop.o > obj-$(CONFIG_HID_WIIMOTE) += hid-wiimote.o > +obj-$(CONFIG_HID_SENSOR_HUB) += hid-sensor-hub.o > > obj-$(CONFIG_USB_HID) += usbhid/ > obj-$(CONFIG_USB_MOUSE) += usbhid/ > diff --git a/drivers/hid/hid-sensor-hub.c > b/drivers/hid/hid-sensor-hub.c new file mode 100644 index > 0000000..6c9f0f8 > --- /dev/null > +++ b/drivers/hid/hid-sensor-hub.c > @@ -0,0 +1,681 @@ > +/* > + * HID Sensors Driver > + * Copyright (c) 2012, Intel Corporation. > + * > + * This program is free software; you can redistribute it and/or > +modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but > +WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY > +or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public > +License for > + * more details. > + * > + * You should have received a copy of the GNU General Public License > +along with > + * this program; if not, write to the Free Software Foundation, Inc., > + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. > + * > + */ > +#include <linux/device.h> > +#include <linux/hid.h> > +#include <linux/usb.h> > +#include "usbhid/usbhid.h" > +#include <linux/module.h> > +#include <linux/slab.h> > +#include <linux/mfd/core.h> > +#include <linux/list.h> > +#include <linux/hid-sensor-ids.h> > +#include <linux/hid-sensor-hub.h> > +#include "hid-ids.h" > + > +/** > + * struct sensor_hub_pending - Synchronous read pending information > + * @status: Pending status true/false. > + * @ready: Completion synchronization data. > + * @usage_id: Usage id for physical device, E.g. Gyro usage id. > + * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro. > + * @raw_size: Response size for a read request. > + * @raw_data: Place holder for received response. > + */ > +struct sensor_hub_pending { > + bool status; > + struct completion ready; > + u32 usage_id; > + u32 attr_usage_id; > + int raw_size; > + u8 *raw_data; > +}; > + > +/** > + * struct sensor_hub_data - Hold a instance data for a HID hub device > + * @hs_dev: Stored hid instance for current hub device. > + * @mutex: Mutex to serialize synchronous request. > + * @lock: Spin lock to protect pending request structure. > + * @pending: Holds information of pending sync read request. > + * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. > + * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). > + */ > +struct sensor_hub_data { > + struct hid_sensor_hub_device *hsdev; > + struct mutex mutex; > + spinlock_t lock; > + struct sensor_hub_pending pending; > + struct list_head dyn_callback_list; > + spinlock_t dyn_lock; > + struct mfd_cell *hid_sensor_hub_client_devs; > + int hid_sensor_client_cnt; > +}; > + > +/** > + * hid_sensor_hub_callbacks_list - Stores callback list > + * @list: list head. > + * @usage_id: usage id for a physical device. > + * @usage_callbacks: Stores registered callback functions. > + * @priv: Private data for a physical device. > + */ > +struct hid_sensor_hub_callbacks_list { > + struct list_head list; > + u32 usage_id; > + struct hid_sensor_hub_callbacks *usage_callback; > + void *priv; > +}; > + > +static int sensor_hub_check_for_sensor_page(struct hid_device *hdev) > +{ > + int i; > + int ret = -EINVAL; > + > + for (i = 0; i < hdev->maxcollection; i++) { > + struct hid_collection *col = &hdev->collection[i]; > + if (col->type == HID_COLLECTION_PHYSICAL && > + (col->usage & HID_USAGE_PAGE) == HID_UP_SENSOR) { > + ret = 0; > + break; > + } > + } > + > + return ret; > +} > + > +static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, > + int dir) > +{ > + struct hid_report *report; > + > + list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { > + if (report->id == id) > + return report; > + } > + hid_warn(hdev, "No report with id 0x%x found\n", id); > + > + return NULL; > +} > + > +static int sensor_hub_get_physical_device_count( > + struct hid_report_enum *report_enum) { > + struct hid_report *report; > + struct hid_field *field; > + int cnt = 0; > + > + list_for_each_entry(report, &report_enum->report_list, list) { > + field = report->field[0]; > + if (report->maxfield && field && > + field->physical) > + cnt++; > + } > + > + return cnt; > +} > + > +static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( > + struct hid_device *hdev, > + u32 usage_id, void **priv) > +{ > + struct hid_sensor_hub_callbacks_list *callback; > + struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > + > + spin_lock(&pdata->dyn_lock); > + list_for_each_entry(callback, &pdata->dyn_callback_list, list) > + if (callback->usage_id == usage_id) { > + *priv = callback->priv; > + spin_unlock(&pdata->dyn_lock); > + return callback->usage_callback; > + } > + spin_unlock(&pdata->dyn_lock); > + > + return NULL; > +} > + > +int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, > + u32 usage_id, > + struct hid_sensor_hub_callbacks *usage_callback) { > + struct hid_sensor_hub_callbacks_list *callback; > + struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); > + > + spin_lock(&pdata->dyn_lock); > + list_for_each_entry(callback, &pdata->dyn_callback_list, list) > + if (callback->usage_id == usage_id) { > + spin_unlock(&pdata->dyn_lock); > + return -EINVAL; > + } > + callback = kzalloc(sizeof(*callback), GFP_KERNEL); > + if (!callback) { > + spin_unlock(&pdata->dyn_lock); > + return -ENOMEM; > + } > + callback->usage_callback = usage_callback; > + callback->usage_id = usage_id; > + callback->priv = NULL; > + list_add_tail(&callback->list, &pdata->dyn_callback_list); > + spin_unlock(&pdata->dyn_lock); > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_register_callback); > + > +int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, > + u32 usage_id) > +{ > + struct hid_sensor_hub_callbacks_list *callback; > + struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); > + > + spin_lock(&pdata->dyn_lock); > + list_for_each_entry(callback, &pdata->dyn_callback_list, list) > + if (callback->usage_id == usage_id) { > + list_del(&callback->list); > + kfree(callback); > + break; > + } > + spin_unlock(&pdata->dyn_lock); > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); > + > +int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, > + u32 field_index, s32 value) > +{ > + struct hid_report *report; > + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); > + int ret = 0; > + > + if (report_id < 0) > + return -EINVAL; > + > + mutex_lock(&data->mutex); > + report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); > + if (!report || (field_index >= report->maxfield)) { > + ret = -EINVAL; > + goto done_proc; > + } > + hid_set_field(report->field[field_index], 0, value); > + usbhid_submit_report(hsdev->hdev, report, USB_DIR_OUT); > + usbhid_wait_io(hsdev->hdev); > + > +done_proc: > + mutex_unlock(&data->mutex); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_set_feature); > + > +int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, > + u32 field_index, s32 *value) > +{ > + struct hid_report *report; > + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); > + int ret = 0; > + > + if (report_id < 0) > + return -EINVAL; > + > + mutex_lock(&data->mutex); > + report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); > + if (!report || (field_index >= report->maxfield)) { > + ret = -EINVAL; > + goto done_proc; > + } > + usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN); > + usbhid_wait_io(hsdev->hdev); > + *value = report->field[field_index]->value[0]; > + > +done_proc: > + mutex_unlock(&data->mutex); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_get_feature); > + > + > +int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, > + u32 usage_id, > + u32 attr_usage_id, u32 report_id) { > + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); > + unsigned long flags; > + struct hid_report *report; > + int ret_val = 0; > + > + if (report_id < 0) > + return -EINVAL; > + > + mutex_lock(&data->mutex); > + memset(&data->pending, 0, sizeof(data->pending)); > + init_completion(&data->pending.ready); > + data->pending.usage_id = usage_id; > + data->pending.attr_usage_id = attr_usage_id; > + data->pending.raw_size = 0; > + > + spin_lock_irqsave(&data->lock, flags); > + data->pending.status = true; > + report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT); > + if (!report) { > + spin_unlock_irqrestore(&data->lock, flags); > + goto err_free; > + } > + usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN); > + spin_unlock_irqrestore(&data->lock, flags); > + wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5); > + switch (data->pending.raw_size) { > + case 1: > + ret_val = *(u8 *)data->pending.raw_data; > + break; > + case 2: > + ret_val = *(u16 *)data->pending.raw_data; > + break; > + case 4: > + ret_val = *(u32 *)data->pending.raw_data; > + break; > + default: > + ret_val = 0; > + } > + kfree(data->pending.raw_data); > + > +err_free: > + data->pending.status = false; > + mutex_unlock(&data->mutex); > + > + return ret_val; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); > + > +int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, > + u8 type, > + u32 usage_id, > + u32 attr_usage_id, > + struct hid_sensor_hub_attribute_info *info) { > + int ret = -1; > + int i, j; > + int collection_index = -1; > + struct hid_report *report; > + struct hid_field *field; > + struct hid_report_enum *report_enum; > + struct hid_device *hdev = hsdev->hdev; > + > + /* Initialize with defaults */ > + info->usage_id = usage_id; > + info->attrib_id = attr_usage_id; > + info->report_id = -1; > + info->index = -1; > + info->units = -1; > + info->unit_expo = -1; > + > + for (i = 0; i < hdev->maxcollection; ++i) { > + struct hid_collection *collection = &hdev->collection[i]; > + if (usage_id == collection->usage) { > + collection_index = i; > + break; > + } > + } > + if (collection_index == -1) > + goto err_ret; > + > + report_enum = &hdev->report_enum[type]; > + list_for_each_entry(report, &report_enum->report_list, list) { > + for (i = 0; i < report->maxfield; ++i) { > + field = report->field[i]; > + if (field->physical == usage_id && > + field->logical == attr_usage_id) { > + info->index = i; > + info->report_id = report->id; > + info->units = field->unit; > + info->unit_expo = field->unit_exponent; > + info->size = field->report_size/8; > + ret = 0; > + } else { > + for (j = 0; j < field->maxusage; ++j) { > + if (field->usage[j].hid == > + attr_usage_id && > + field->usage[j].collection_index == > + collection_index) { > + info->index = i; > + info->report_id = report->id; > + info->units = field->unit; > + info->unit_expo = > + field->unit_exponent; > + info->size = > + field->report_size/8; > + ret = 0; > + break; > + } > + } > + } > + if (ret == 0) > + break; > + } > + } > + > +err_ret: > + return ret; > +} > +EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); > + > +#ifdef CONFIG_PM > +static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t > +message) { > + struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > + struct hid_sensor_hub_callbacks_list *callback; > + > + hid_dbg(hdev, " sensor_hub_suspend\n"); > + spin_lock(&pdata->dyn_lock); > + list_for_each_entry(callback, &pdata->dyn_callback_list, list) { > + if (callback->usage_callback->suspend) > + callback->usage_callback->suspend( > + pdata->hsdev, callback->priv); > + } > + spin_unlock(&pdata->dyn_lock); > + > + return 0; > +} > + > +static int sensor_hub_resume(struct hid_device *hdev) { > + struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > + struct hid_sensor_hub_callbacks_list *callback; > + > + hid_dbg(hdev, " sensor_hub_resume\n"); > + spin_lock(&pdata->dyn_lock); > + list_for_each_entry(callback, &pdata->dyn_callback_list, list) { > + if (callback->usage_callback->resume) > + callback->usage_callback->resume( > + pdata->hsdev, callback->priv); > + } > + spin_unlock(&pdata->dyn_lock); > + > + return 0; > +} > + > +static int sensor_hub_reset_resume(struct hid_device *hdev) { > + return 0; > +} > +#endif > +/* > + * Handle raw report as sent by device */ static int > +sensor_hub_raw_event(struct hid_device *hdev, > + struct hid_report *report, u8 *raw_data, int size) { > + int i; > + u8 *ptr; > + int sz; > + struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > + unsigned long flags; > + struct hid_sensor_hub_callbacks *callback = NULL; > + struct hid_collection *collection = NULL; > + void *priv = NULL; > + > + hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", > + report->id, size, report->type); > + hid_dbg(hdev, "maxfield:%d\n", report->maxfield); > + if (report->type != HID_INPUT_REPORT) > + return 1; > + > + ptr = raw_data; > + ptr++; /*Skip report id*/ > + > + if (!report) > + goto err_report; > + > + spin_lock_irqsave(&pdata->lock, flags); > + > + for (i = 0; i < report->maxfield; ++i) { > + > + hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", > + i, report->field[i]->usage->collection_index, > + report->field[i]->usage->hid, > + report->field[i]->report_size/8); > + > + sz = report->field[i]->report_size/8; > + if (pdata->pending.status && pdata->pending.attr_usage_id == > + report->field[i]->usage->hid) { > + hid_dbg(hdev, "data was pending ...\n"); > + pdata->pending.raw_data = kmalloc(sz, GFP_KERNEL); > + if (pdata->pending.raw_data) { > + memcpy(pdata->pending.raw_data, ptr, sz); > + pdata->pending.raw_size = sz; > + } else > + pdata->pending.raw_size = 0; > + complete(&pdata->pending.ready); > + } > + collection = &hdev->collection[ > + report->field[i]->usage->collection_index]; > + hid_dbg(hdev, "collection->usage %x\n", > + collection->usage); > + callback = sensor_hub_get_callback(pdata->hsdev->hdev, > + report->field[i]->physical, > + &priv); > + if (callback && callback->capture_sample) { > + if (report->field[i]->logical) > + callback->capture_sample(pdata->hsdev, > + report->field[i]->logical, sz, ptr, > + callback->pdev); > + else > + callback->capture_sample(pdata->hsdev, > + report->field[i]->usage->hid, sz, ptr, > + callback->pdev); > + } > + ptr += sz; > + } > + if (callback && collection && callback->send_event) > + callback->send_event(pdata->hsdev, collection->usage, > + callback->pdev); > + spin_unlock_irqrestore(&pdata->lock, flags); > + > +err_report: > + return 1; > +} > + > +static int sensor_hub_probe(struct hid_device *hdev, > + const struct hid_device_id *id) > +{ > + int ret; > + struct sensor_hub_data *sd; > + int i; > + char *name; > + struct hid_report *report; > + struct hid_report_enum *report_enum; > + struct hid_field *field; > + int dev_cnt; > + > + sd = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL); > + if (!sd) { > + hid_err(hdev, "cannot allocate Sensor data\n"); > + return -ENOMEM; > + } > + sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL); > + if (!sd->hsdev) { > + hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); > + ret = -ENOMEM; > + goto err_free_hub; > + } > + hid_set_drvdata(hdev, sd); > + sd->hsdev->hdev = hdev; > + sd->hsdev->vendor_id = hdev->vendor; > + sd->hsdev->product_id = hdev->product; > + spin_lock_init(&sd->lock); > + spin_lock_init(&sd->dyn_lock); > + mutex_init(&sd->mutex); > + ret = hid_parse(hdev); > + if (ret) { > + hid_err(hdev, "parse failed\n"); > + goto err_free; > + } > + if (sensor_hub_check_for_sensor_page(hdev) < 0) { > + hid_err(hdev, "sensor page not found\n"); > + goto err_free; > + } > + INIT_LIST_HEAD(&hdev->inputs); > + > + hdev->claimed = HID_CLAIMED_INPUT; > + ret = hid_hw_start(hdev, 0); > + if (ret) { > + hid_err(hdev, "hw start failed\n"); > + goto err_free; > + } > + ret = hid_hw_open(hdev); > + if (ret) { > + hid_err(hdev, "failed to open input interrupt pipe\n"); > + goto err_stop_hw; > + } > + > + INIT_LIST_HEAD(&sd->dyn_callback_list); > + sd->hid_sensor_client_cnt = 0; > + report_enum = &hdev->report_enum[HID_INPUT_REPORT]; > + > + dev_cnt = sensor_hub_get_physical_device_count(report_enum); > + sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt * > + sizeof(struct mfd_cell), > + GFP_KERNEL); > + if (sd->hid_sensor_hub_client_devs == NULL) { > + hid_err(hdev, > + "Failed to allocate memory for mfd cells\n"); > + ret = -ENOMEM; > + goto err_close; > + } > + list_for_each_entry(report, &report_enum->report_list, list) { > + hid_dbg(hdev, "Report id:%x\n", report->id); > + field = report->field[0]; > + if (report->maxfield && field && > + field->physical) { > + name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x", > + field->physical); > + if (name == NULL) { > + hid_err(hdev, > + "Failed MFD device name\n"); > + ret = -ENOMEM; > + goto err_free_cells; > + } > + sd->hid_sensor_hub_client_devs[ > + sd->hid_sensor_client_cnt].name = name; > + sd->hid_sensor_hub_client_devs[ > + sd->hid_sensor_client_cnt].platform_data = > + sd->hsdev; > + sd->hid_sensor_hub_client_devs[ > + sd->hid_sensor_client_cnt].pdata_size = > + sizeof(*sd->hsdev); > + hid_dbg(hdev, "Adding %s:%x\n", name, > + (unsigned int)sd); > + sd->hid_sensor_client_cnt++; > + } > + } > + ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs, > + sd->hid_sensor_client_cnt, NULL, 0); > + if (ret < 0) > + goto err_free_names; > + > + return ret; > + > +err_free_names: > + for (i = 0; i < sd->hid_sensor_client_cnt ; ++i) > + kfree(sd->hid_sensor_hub_client_devs[i].name); > +err_free_cells: > + kfree(sd->hid_sensor_hub_client_devs); > +err_close: > + hid_hw_stop(hdev); > + hid_hw_close(hdev); > +err_stop_hw: > + hid_hw_stop(hdev); > +err_free: > + kfree(sd->hsdev); > +err_free_hub: > + kfree(sd); > + > + return ret; > +} > + > +static void sensor_hub_remove(struct hid_device *hdev) { > + struct sensor_hub_data *data = hid_get_drvdata(hdev); > + unsigned long flags; > + int i; > + > + hid_dbg(hdev, " hardware removed\n"); > + hdev->claimed &= ~HID_CLAIMED_INPUT; > + hid_hw_stop(hdev); > + hid_hw_close(hdev); > + spin_lock_irqsave(&data->lock, flags); > + if (data->pending.status) > + complete(&data->pending.ready); > + spin_unlock_irqrestore(&data->lock, flags); > + mfd_remove_devices(&hdev->dev); > + for (i = 0; i < data->hid_sensor_client_cnt ; ++i) > + kfree(data->hid_sensor_hub_client_devs[i].name); > + kfree(data->hid_sensor_hub_client_devs); > + hid_set_drvdata(hdev, NULL); > + mutex_destroy(&data->mutex); > + kfree(data->hsdev); > + kfree(data); > +} > + > +static const struct hid_device_id sensor_hub_devices[] = { > + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086, > + USB_DEVICE_ID_SENSOR_HUB_1020) }, > + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087, > + USB_DEVICE_ID_SENSOR_HUB_1020) }, > + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086, > + USB_DEVICE_ID_SENSOR_HUB_09FA) }, > + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087, > + USB_DEVICE_ID_SENSOR_HUB_09FA) }, > + { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, > + USB_DEVICE_ID_SENSOR_HUB_7014) }, > + { } > +}; > + > +static const struct hid_usage_id sensor_hub_grabbed_usages[] = { > + { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, > + { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 } }; > + > +static struct hid_driver sensor_hub_driver = { > + .name = "hid-sensor-hub", > + .id_table = sensor_hub_devices, > + .probe = sensor_hub_probe, > + .remove = sensor_hub_remove, > + .raw_event = sensor_hub_raw_event, > +#ifdef CONFIG_PM > + .suspend = sensor_hub_suspend, > + .resume = sensor_hub_resume, > + .reset_resume = sensor_hub_reset_resume, #endif }; > + > +static int __init sensor_hub_init(void) { > + return hid_register_driver(&sensor_hub_driver); > +} > + > +static void __exit sensor_hub_exit(void) { > + hid_unregister_driver(&sensor_hub_driver); > +} > + > +module_init(sensor_hub_init); > +module_exit(sensor_hub_exit); > + > +MODULE_DESCRIPTION("HID Sensor Hub driver"); MODULE_AUTHOR("Srinivas > +Pandruvada <srinivas.pandruvada@xxxxxxxxx>"); > +MODULE_LICENSE("GPL"); > diff --git a/include/linux/hid-sensor-hub.h > b/include/linux/hid-sensor-hub.h new file mode 100644 index > 0000000..0aa5f4c > --- /dev/null > +++ b/include/linux/hid-sensor-hub.h > @@ -0,0 +1,160 @@ > +/* > + * HID Sensors Driver > + * Copyright (c) 2012, Intel Corporation. > + * > + * This program is free software; you can redistribute it and/or > +modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but > +WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY > +or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public > +License for > + * more details. > + * > + * You should have received a copy of the GNU General Public License > +along with > + * this program; if not, write to the Free Software Foundation, Inc., > + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. > + * > + */ > +#ifndef _HID_SENSORS_HUB_H > +#define _HID_SENSORS_HUB_H > + > +#include <linux/hid.h> > +#include <linux/hid-sensor-ids.h> > + > +/** > + * struct hid_sensor_hub_attribute_info - Attribute info > + * @usage_id: Parent usage id of a physical device. > + * @attrib_id: Attribute id for this attribute. > + * @report_id: Report id in which this information resides. > + * @index: Field index in the report. > + * @units: Measurment unit for this attribute. > + * @unit_expo: Exponent used in the data. > + * @size: Size in bytes for data size. > + */ > +struct hid_sensor_hub_attribute_info { > + u32 usage_id; > + u32 attrib_id; > + s32 report_id; > + s32 index; > + s32 units; > + s32 unit_expo; > + s32 size; > +}; > + > +/** > + * struct hid_sensor_hub_device - Stores the hub instance data > + * @hdev: Stores the hid instance. > + * @vendor_id: Vendor id of hub device. > + * @product_id: Product id of hub device. > + */ > +struct hid_sensor_hub_device { > + struct hid_device *hdev; > + u32 vendor_id; > + u32 product_id; > +}; > + > +/** > + * struct hid_sensor_hub_callbacks - Client callback functions > + * @pdev: Platform device instance of the client driver. > + * @suspend: Suspend callback. > + * @resume: Resume callback. > + * @capture_sample: Callback to get a sample. > + * @send_event: Send notification to indicate all samples are > + * captured, process and send event > + */ > +struct hid_sensor_hub_callbacks { > + struct platform_device *pdev; > + int (*suspend)(struct hid_sensor_hub_device *hsdev, void *priv); > + int (*resume)(struct hid_sensor_hub_device *hsdev, void *priv); > + int (*capture_sample)(struct hid_sensor_hub_device *hsdev, > + u32 usage_id, size_t raw_len, char *raw_data, > + void *priv); > + int (*send_event)(struct hid_sensor_hub_device *hsdev, u32 usage_id, > + void *priv); > +}; > + > +/* Registration functions */ > + > +/** > +* sensor_hub_register_callback() - Register client callbacks > +* @hsdev: Hub device instance. > +* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro). > +* @usage_callback: Callback function storage > +* > +* Used to register callbacks by client processing drivers. Sensor > +* hub core driver will call these callbacks to offload processing > +* of data streams and notifications. > +*/ > +int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, > + u32 usage_id, > + struct hid_sensor_hub_callbacks *usage_callback); > + > +/** > +* sensor_hub_remove_callback() - Remove client callbacks > +* @hsdev: Hub device instance. > +* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro). > +* > +* If there is a callback registred, this call will remove that > +* callbacks, so that it will stop data and event notifications. > +*/ > +int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, > + u32 usage_id); > + > + > +/* Hid sensor hub core interfaces */ > + > +/** > +* sensor_hub_input_get_attribute_info() - Get an attribute information > +* @hsdev: Hub device instance. > +* @type: Type of this attribute, input/output/feature > +* @usage_id: Attribute usage id of parent physical device as per spec > +* @attr_usage_id: Attribute usage id as per spec > +* @info: return information about attribute after parsing report > +* > +* Parses report and returns the attribute information such as report > +id, > +* field index, units and exponet etc. > +*/ > +int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, > + u8 type, > + u32 usage_id, u32 attr_usage_id, > + struct hid_sensor_hub_attribute_info *info); > + > +/** > +* sensor_hub_input_attr_get_raw_value() - Synchronous read request > +* @usage_id: Attribute usage id of parent physical device as per spec > +* @attr_usage_id: Attribute usage id as per spec > +* @report_id: Report id to look for > +* > +* Issues a synchronous read request for an input attribute. Returns > +* data upto 32 bits. Since client can get events, so this call should > +* not be used for data paths, this will impact performance. > +*/ > + > +int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, > + u32 usage_id, > + u32 attr_usage_id, u32 report_id); > +/** > +* sensor_hub_set_feature() - Feature set request > +* @report_id: Report id to look for > +* @field_index: Field index inside a report > +* @value: Value to set > +* > +* Used to set a field in feature report. For example this can set > +polling > +* interval, sensitivity, activate/deactivate state. > +*/ > +int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, > + u32 field_index, s32 value); > + > +/** > +* sensor_hub_get_feature() - Feature get request > +* @report_id: Report id to look for > +* @field_index: Field index inside a report > +* @value: Place holder for return value > +* > +* Used to get a field in feature report. For example this can get > +polling > +* interval, sensitivity, activate/deactivate state. > +*/ > +int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, > + u32 field_index, s32 *value); > +#endif > diff --git a/include/linux/hid-sensor-ids.h > b/include/linux/hid-sensor-ids.h new file mode 100644 index > 0000000..292e80f > --- /dev/null > +++ b/include/linux/hid-sensor-ids.h > @@ -0,0 +1,111 @@ > +/* > + * HID Sensors Driver > + * Copyright (c) 2012, Intel Corporation. > + * > + * This program is free software; you can redistribute it and/or > +modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but > +WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY > +or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public > +License for > + * more details. > + * > + * You should have received a copy of the GNU General Public License > +along with > + * this program; if not, write to the Free Software Foundation, Inc., > + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. > + * > + */ > +#ifndef _HID_SENSORS_IDS_H > +#define _HID_SENSORS_IDS_H > + > +#define HID_UP_SENSOR 0x00200000 > + > +/* Accel 3D (200073) */ > +#define HID_USAGE_SENSOR_ACCEL_3D 0x200073 > +#define HID_USAGE_SENSOR_ACCEL_X_AXIS 0x200453 > +#define HID_USAGE_SENSOR_ACCEL_Y_AXIS 0x200454 > +#define HID_USAGE_SENSOR_ACCEL_Z_AXIS 0x200455 > + > +/* ALS (200041) */ > +#define HID_USAGE_SENSOR_ALS 0x200041 > +#define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1 > + > +/* Gyro 3D: (200076) */ > +#define HID_USAGE_SENSOR_GYRO_3D 0x200076 > +#define HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS 0x200457 > +#define HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS 0x200458 > +#define HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS 0x200459 > + > +/*ORIENTATION: Compass 3D: (200083) */ > +#define HID_USAGE_SENSOR_COMPASS_3D 0x200083 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING 0x200471 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_X 0x200472 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_Y 0x200473 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_Z 0x200474 > + > +#define HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH 0x200475 > +#define HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH 0x200476 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_NORTH 0x200477 > +#define HID_USAGE_SENSOR_ORIENT_TRUE_NORTH 0x200478 > + > +#define HID_USAGE_SENSOR_ORIENT_DISTANCE 0x200479 > +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_X 0x20047A > +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_Y 0x20047B > +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_Z 0x20047C > +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_OUT_OF_RANGE 0x20047D > +#define HID_USAGE_SENSOR_ORIENT_TILT 0x20047E > +#define HID_USAGE_SENSOR_ORIENT_TILT_X 0x20047F > +#define HID_USAGE_SENSOR_ORIENT_TILT_Y 0x200480 > +#define HID_USAGE_SENSOR_ORIENT_TILT_Z 0x200481 > +#define HID_USAGE_SENSOR_ORIENT_ROTATION_MATRIX 0x200482 > +#define HID_USAGE_SENSOR_ORIENT_QUATERNION 0x200483 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX 0x200484 > + > +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS 0x200485 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS 0x200486 > +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS 0x200487 > + > +/* Units */ > +#define HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED 0x00 > +#define HID_USAGE_SENSOR_UNITS_LUX 0x01 > +#define HID_USAGE_SENSOR_UNITS_KELVIN 0x01000100 > +#define HID_USAGE_SENSOR_UNITS_FAHRENHEIT 0x03000100 > +#define HID_USAGE_SENSOR_UNITS_PASCAL 0xF1E1 > +#define HID_USAGE_SENSOR_UNITS_NEWTON 0x11E1 > +#define HID_USAGE_SENSOR_UNITS_METERS_PER_SECOND 0x11F0 > +#define HID_USAGE_SENSOR_UNITS_METERS_PER_SEC_SQRD 0x11E0 > +#define HID_USAGE_SENSOR_UNITS_FARAD 0xE14F2000 > +#define HID_USAGE_SENSOR_UNITS_AMPERE 0x01001000 > +#define HID_USAGE_SENSOR_UNITS_WATT 0x21d1 > +#define HID_USAGE_SENSOR_UNITS_HENRY 0x21E1E000 > +#define HID_USAGE_SENSOR_UNITS_OHM 0x21D1E000 > +#define HID_USAGE_SENSOR_UNITS_VOLT 0x21D1F000 > +#define HID_USAGE_SENSOR_UNITS_HERTZ 0x01F0 > +#define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SEC_SQRD 0x14E0 > +#define HID_USAGE_SENSOR_UNITS_RADIANS 0x12 > +#define HID_USAGE_SENSOR_UNITS_RADIANS_PER_SECOND 0x12F0 > +#define HID_USAGE_SENSOR_UNITS_RADIANS_PER_SEC_SQRD 0x12E0 > +#define HID_USAGE_SENSOR_UNITS_SECOND 0x0110 > +#define HID_USAGE_SENSOR_UNITS_GAUSS 0x01E1F000 > +#define HID_USAGE_SENSOR_UNITS_GRAM 0x0101 > +#define HID_USAGE_SENSOR_UNITS_CENTIMETER 0x11 > +#define HID_USAGE_SENSOR_UNITS_G 0x1A > +#define HID_USAGE_SENSOR_UNITS_MILLISECOND 0x19 > +#define HID_USAGE_SENSOR_UNITS_PERCENT 0x17 > +#define HID_USAGE_SENSOR_UNITS_DEGREES 0x14 > +#define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15 > + > +/* Common selectors */ > +#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 > +#define HID_USAGE_SENSOR_PROP_SENSITIVITY_REL_PCT 0x200311 > +#define HID_USAGE_SENSOR_PROP_ACCURACY 0x200312 > +#define HID_USAGE_SENSOR_PROP_RESOLUTION 0x200313 > +#define HID_USAGE_SENSOR_PROP_RANGE_MAXIMUM 0x200314 > +#define HID_USAGE_SENSOR_PROP_RANGE_MINIMUM 0x200315 > +#define HID_USAGE_SENSOR_PROP_REPORT_STATE 0x200316 > +#define HID_USAGE_SENSOR_PROY_POWER_STATE 0x200319 > + > +#endif > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
