HID: add feature_mapping callback

Currently hid doesn't export the features it knows to the specific modules.
Some information can be really important in such features: MosArt and
Cypress devices are by default not in a multitouch mode.
We have to send the value 2 on the right feature.

This patch exports to the module the features report so they can find the
right feature to set up the correct mode.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index d8d372b..8703b2c 100644 (file)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -290,6 +290,14 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                goto ignore;
        }
 
+       if (field->report_type == HID_FEATURE_REPORT) {
+               if (device->driver->feature_mapping) {
+                       device->driver->feature_mapping(device, hidinput, field,
+                               usage);
+               }
+               goto ignore;
+       }
+
        if (device->driver->input_mapping) {
                int ret = device->driver->input_mapping(device, hidinput, field,
                                usage, &bit, &max);
@@ -839,7 +847,6 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
        struct hid_input *hidinput = NULL;
        struct input_dev *input_dev;
        int i, j, k;
-       int max_report_type = HID_OUTPUT_REPORT;
 
        INIT_LIST_HEAD(&hid->inputs);
 
@@ -856,10 +863,11 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
                        return -1;
        }
 
-       if (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
-               max_report_type = HID_INPUT_REPORT;
+       for (k = HID_INPUT_REPORT; k <= HID_FEATURE_REPORT; k++) {
+               if (k == HID_OUTPUT_REPORT &&
+                       hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
+                       continue;
 
-       for (k = HID_INPUT_REPORT; k <= max_report_type; k++)
                list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 
                        if (!report->maxfield)
@@ -912,6 +920,7 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
                                hidinput = NULL;
                        }
                }
+       }
 
        if (hidinput && input_register_device(hidinput->input))
                goto out_cleanup;

diff --git a/include/linux/hid.h b/include/linux/hid.h
index bb0f56f..96bd792 100644 (file)
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -593,6 +593,7 @@ struct hid_usage_id {
  * @report_fixup: called before report descriptor parsing (NULL means nop)
  * @input_mapping: invoked on input registering before mapping an usage
  * @input_mapped: invoked on input registering after mapping an usage
+ * @feature_mapping: invoked on feature registering
  * @suspend: invoked on suspend (NULL means nop)
  * @resume: invoked on resume if device was not reset (NULL means nop)
  * @reset_resume: invoked on resume if device was reset (NULL means nop)
@@ -636,6 +637,9 @@ struct hid_driver {
        int (*input_mapped)(struct hid_device *hdev,
                        struct hid_input *hidinput, struct hid_field *field,
                        struct hid_usage *usage, unsigned long **bit, int *max);
+       void (*feature_mapping)(struct hid_device *hdev,
+                       struct hid_input *hidinput, struct hid_field *field,
+                       struct hid_usage *usage);
 #ifdef CONFIG_PM
        int (*suspend)(struct hid_device *hdev, pm_message_t message);
        int (*resume)(struct hid_device *hdev);