From 2f43de605e700f5aa5cad15e19f8ffe54b1d4c86 Mon Sep 17 00:00:00 2001 From: Andrew Duggan Date: Fri, 19 Dec 2014 14:45:41 -0800 Subject: [PATCH] HID: rmi: Support non rmi devices by passing events to hid-input Allowing hid-rmi to bind to non rmi devices allows us to support composite USB devices which contain several HID devices one of which is a HID touchpad. Since all of the devices have the same VID and PID we can add the device to the hid_have_special_driver list and have hid-rmi handle all of the devices. Then hid-rmi's probe can look for the rmi specific HID report IDs and decide if it should handle the device as a rmi device or simply report that the events needs additional processing. Signed-off-by: Andrew Duggan Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- drivers/hid/hid-rmi.c | 93 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 76 insertions(+), 17 deletions(-) diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c index b51200fe2f33..018f80f5fec6 100644 --- a/drivers/hid/hid-rmi.c +++ b/drivers/hid/hid-rmi.c @@ -33,6 +33,9 @@ #define RMI_READ_DATA_PENDING BIT(1) #define RMI_STARTED BIT(2) +/* device flags */ +#define RMI_DEVICE BIT(0) + enum rmi_mode_type { RMI_MODE_OFF = 0, RMI_MODE_ATTN_REPORTS = 1, @@ -118,6 +121,8 @@ struct rmi_data { struct work_struct reset_work; struct hid_device *hdev; + + unsigned long device_flags; }; #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) @@ -452,9 +457,23 @@ static int rmi_raw_event(struct hid_device *hdev, return rmi_read_data_event(hdev, data, size); case RMI_ATTN_REPORT_ID: return rmi_input_event(hdev, data, size); - case RMI_MOUSE_REPORT_ID: + default: + return 1; + } + + return 0; +} + +static int rmi_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct rmi_data *data = hid_get_drvdata(hdev); + + if ((data->device_flags & RMI_DEVICE) && + (field->application == HID_GD_POINTER || + field->application == HID_GD_MOUSE)) { rmi_schedule_reset(hdev); - break; + return 1; } return 0; @@ -856,6 +875,9 @@ static void rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) if (ret) return; + if (!(data->device_flags & RMI_DEVICE)) + return; + /* Allow incoming hid reports */ hid_device_io_start(hdev); @@ -914,8 +936,33 @@ static int rmi_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { - /* we want to make HID ignore the advertised HID collection */ - return -1; + struct rmi_data *data = hid_get_drvdata(hdev); + + /* + * we want to make HID ignore the advertised HID collection + * for RMI deivces + */ + if (data->device_flags & RMI_DEVICE) + return -1; + + return 0; +} + +static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type, + unsigned id, struct hid_report **report) +{ + int i; + + *report = hdev->report_enum[type].report_id_hash[id]; + if (*report) { + for (i = 0; i < (*report)->maxfield; i++) { + unsigned app = (*report)->field[i]->application; + if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR) + return 1; + } + } + + return 0; } static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) @@ -925,6 +972,7 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) size_t alloc_size; struct hid_report *input_report; struct hid_report *output_report; + struct hid_report *feature_report; data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); if (!data) @@ -943,27 +991,35 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) return ret; } - input_report = hdev->report_enum[HID_INPUT_REPORT] - .report_id_hash[RMI_ATTN_REPORT_ID]; - if (!input_report) { - hid_err(hdev, "device does not have expected input report\n"); - ret = -ENODEV; - return ret; + /* + * Check for the RMI specific report ids. If they are misisng + * simply return and let the events be processed by hid-input + */ + if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT, + RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) { + hid_dbg(hdev, "device does not have set mode feature report\n"); + goto start; + } + + if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT, + RMI_ATTN_REPORT_ID, &input_report)) { + hid_dbg(hdev, "device does not have attention input report\n"); + goto start; } data->input_report_size = (input_report->size >> 3) + 1 /* report id */; - output_report = hdev->report_enum[HID_OUTPUT_REPORT] - .report_id_hash[RMI_WRITE_REPORT_ID]; - if (!output_report) { - hid_err(hdev, "device does not have expected output report\n"); - ret = -ENODEV; - return ret; + if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT, + RMI_WRITE_REPORT_ID, &output_report)) { + hid_dbg(hdev, + "device does not have rmi write output report\n"); + goto start; } data->output_report_size = (output_report->size >> 3) + 1 /* report id */; + data->device_flags |= RMI_DEVICE; alloc_size = data->output_report_size + data->input_report_size; data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); @@ -978,13 +1034,15 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) mutex_init(&data->page_mutex); +start: ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { hid_err(hdev, "hw start failed\n"); return ret; } - if (!test_bit(RMI_STARTED, &data->flags)) + if ((data->device_flags & RMI_DEVICE) && + !test_bit(RMI_STARTED, &data->flags)) /* * The device maybe in the bootloader if rmi_input_configured * failed to find F11 in the PDT. Print an error, but don't @@ -1017,6 +1075,7 @@ static struct hid_driver rmi_driver = { .id_table = rmi_id, .probe = rmi_probe, .remove = rmi_remove, + .event = rmi_event, .raw_event = rmi_raw_event, .input_mapping = rmi_input_mapping, .input_configured = rmi_input_configured, -- 2.20.1