1 files changed, 176 insertions, 134 deletions

diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 38b12e45780..486dbde2ba2 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -26,7 +26,7 @@
 #include <linux/hid.h>
 #include <linux/module.h>
 #include <linux/usb.h>
-#include "usbhid/usbhid.h"
+#include <asm/unaligned.h>
 #include "hid-ids.h"
 #include "hid-logitech-dj.h"
 
@@ -44,14 +44,6 @@ static const char kbd_descriptor[] = {
 	0x19, 0xE0,		/*   USAGE_MINIMUM (Left Control)   */
 	0x29, 0xE7,		/*   USAGE_MAXIMUM (Right GUI)      */
 	0x81, 0x02,		/*   INPUT (Data,Var,Abs)       */
-	0x95, 0x05,		/*   REPORT COUNT (5)           */
-	0x05, 0x08,		/*   USAGE PAGE (LED page)      */
-	0x19, 0x01,		/*   USAGE MINIMUM (1)          */
-	0x29, 0x05,		/*   USAGE MAXIMUM (5)          */
-	0x91, 0x02,		/*   OUTPUT (Data, Variable, Absolute)  */
-	0x95, 0x01,		/*   REPORT COUNT (1)           */
-	0x75, 0x03,		/*   REPORT SIZE (3)            */
-	0x91, 0x01,		/*   OUTPUT (Constant)          */
 	0x95, 0x06,		/*   REPORT_COUNT (6)           */
 	0x75, 0x08,		/*   REPORT_SIZE (8)            */
 	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
@@ -60,6 +52,18 @@ static const char kbd_descriptor[] = {
 	0x19, 0x00,		/*   USAGE_MINIMUM (no event)       */
 	0x2A, 0xFF, 0x00,	/*   USAGE_MAXIMUM (reserved)       */
 	0x81, 0x00,		/*   INPUT (Data,Ary,Abs)       */
+	0x85, 0x0e,		/* REPORT_ID (14)               */
+	0x05, 0x08,		/*   USAGE PAGE (LED page)      */
+	0x95, 0x05,		/*   REPORT COUNT (5)           */
+	0x75, 0x01,		/*   REPORT SIZE (1)            */
+	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
+	0x25, 0x01,		/*   LOGICAL_MAXIMUM (1)        */
+	0x19, 0x01,		/*   USAGE MINIMUM (1)          */
+	0x29, 0x05,		/*   USAGE MAXIMUM (5)          */
+	0x91, 0x02,		/*   OUTPUT (Data, Variable, Absolute)  */
+	0x95, 0x01,		/*   REPORT COUNT (1)           */
+	0x75, 0x03,		/*   REPORT SIZE (3)            */
+	0x91, 0x01,		/*   OUTPUT (Constant)          */
 	0xC0
 };
 
@@ -155,6 +159,14 @@ static const char media_descriptor[] = {
 /* Maximum size of all defined hid reports in bytes (including report id) */
 #define MAX_REPORT_SIZE 8
 
+/* Make sure all descriptors are present here */
+#define MAX_RDESC_SIZE				\
+	(sizeof(kbd_descriptor) +		\
+	 sizeof(mse_descriptor) +		\
+	 sizeof(consumer_descriptor) +		\
+	 sizeof(syscontrol_descriptor) +	\
+	 sizeof(media_descriptor))
+
 /* Number of possible hid report types that can be created by this driver.
  *
  * Right now, RF report types have the same report types (or report id's)
@@ -181,9 +193,7 @@ static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = {
 
 static struct hid_ll_driver logi_dj_ll_driver;
 
-static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
-					size_t count,
-					unsigned char report_type);
+static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
 
 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
 						struct dj_report *dj_report)
@@ -224,6 +234,7 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 	if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
 	    SPFUNCTION_DEVICE_LIST_EMPTY) {
 		dbg_hid("%s: device list is empty\n", __func__);
+		djrcv_dev->querying_devices = false;
 		return;
 	}
 
@@ -234,6 +245,12 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 		return;
 	}
 
+	if (djrcv_dev->paired_dj_devices[dj_report->device_index]) {
+		/* The device is already known. No need to reallocate it. */
+		dbg_hid("%s: device is already known\n", __func__);
+		return;
+	}
+
 	dj_hiddev = hid_allocate_device();
 	if (IS_ERR(dj_hiddev)) {
 		dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device failed\n",
@@ -242,7 +259,6 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 	}
 
 	dj_hiddev->ll_driver = &logi_dj_ll_driver;
-	dj_hiddev->hid_output_raw_report = logi_dj_output_hidraw_report;
 
 	dj_hiddev->dev.parent = &djrcv_hdev->dev;
 	dj_hiddev->bus = BUS_USB;
@@ -265,8 +281,8 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 		goto dj_device_allocate_fail;
 	}
 
-	dj_dev->reports_supported = le32_to_cpu(
-		dj_report->report_params[DEVICE_PAIRED_RF_REPORT_TYPE]);
+	dj_dev->reports_supported = get_unaligned_le32(
+		dj_report->report_params + DEVICE_PAIRED_RF_REPORT_TYPE);
 	dj_dev->hdev = dj_hiddev;
 	dj_dev->dj_receiver_dev = djrcv_dev;
 	dj_dev->device_index = dj_report->device_index;
@@ -297,6 +313,7 @@ static void delayedwork_callback(struct work_struct *work)
 	struct dj_report dj_report;
 	unsigned long flags;
 	int count;
+	int retval;
 
 	dbg_hid("%s\n", __func__);
 
@@ -329,6 +346,25 @@ static void delayedwork_callback(struct work_struct *work)
 		logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report);
 		break;
 	default:
+	/* A normal report (i. e. not belonging to a pair/unpair notification)
+	 * arriving here, means that the report arrived but we did not have a
+	 * paired dj_device associated to the report's device_index, this
+	 * means that the original "device paired" notification corresponding
+	 * to this dj_device never arrived to this driver. The reason is that
+	 * hid-core discards all packets coming from a device while probe() is
+	 * executing. */
+	if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) {
+		/* ok, we don't know the device, just re-ask the
+		 * receiver for the list of connected devices. */
+		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
+		if (!retval) {
+			/* everything went fine, so just leave */
+			break;
+		}
+		dev_err(&djrcv_dev->hdev->dev,
+			"%s:logi_dj_recv_query_paired_devices "
+			"error:%d\n", __func__, retval);
+		}
 		dbg_hid("%s: unexpected report type\n", __func__);
 	}
 }
@@ -359,6 +395,12 @@ static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
 	if (!djdev) {
 		dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
 			" is NULL, index %d\n", dj_report->device_index);
+		kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
+
+		if (schedule_work(&djrcv_dev->work) == 0) {
+			dbg_hid("%s: did not schedule the work item, was already "
+			"queued\n", __func__);
+		}
 		return;
 	}
 
@@ -389,6 +431,12 @@ static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev,
 	if (dj_device == NULL) {
 		dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
 			" is NULL, index %d\n", dj_report->device_index);
+		kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
+
+		if (schedule_work(&djrcv_dev->work) == 0) {
+			dbg_hid("%s: did not schedule the work item, was already "
+			"queued\n", __func__);
+		}
 		return;
 	}
 
@@ -410,44 +458,73 @@ static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
 				    struct dj_report *dj_report)
 {
 	struct hid_device *hdev = djrcv_dev->hdev;
-	int sent_bytes;
+	struct hid_report *report;
+	struct hid_report_enum *output_report_enum;
+	u8 *data = (u8 *)(&dj_report->device_index);
+	unsigned int i;
 
-	if (!hdev->hid_output_raw_report) {
-		dev_err(&hdev->dev, "%s:"
-			"hid_output_raw_report is null\n", __func__);
+	output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT];
+	report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
+
+	if (!report) {
+		dev_err(&hdev->dev, "%s: unable to find dj report\n", __func__);
 		return -ENODEV;
 	}
 
-	sent_bytes = hdev->hid_output_raw_report(hdev, (u8 *) dj_report,
-						 sizeof(struct dj_report),
-						 HID_OUTPUT_REPORT);
+	for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++)
+		report->field[0]->value[i] = data[i];
+
+	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
 
-	return (sent_bytes < 0) ? sent_bytes : 0;
+	return 0;
 }
 
 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
 {
-	struct dj_report dj_report;
+	struct dj_report *dj_report;
+	int retval;
+
+	/* no need to protect djrcv_dev->querying_devices */
+	if (djrcv_dev->querying_devices)
+		return 0;
 
-	memset(&dj_report, 0, sizeof(dj_report));
-	dj_report.report_id = REPORT_ID_DJ_SHORT;
-	dj_report.device_index = 0xFF;
-	dj_report.report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
-	return logi_dj_recv_send_report(djrcv_dev, &dj_report);
+	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
+	if (!dj_report)
+		return -ENOMEM;
+	dj_report->report_id = REPORT_ID_DJ_SHORT;
+	dj_report->device_index = 0xFF;
+	dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
+	retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
+	kfree(dj_report);
+	return retval;
 }
 
+
 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
 					  unsigned timeout)
 {
-	struct dj_report dj_report;
+	struct dj_report *dj_report;
+	int retval;
 
-	memset(&dj_report, 0, sizeof(dj_report));
-	dj_report.report_id = REPORT_ID_DJ_SHORT;
-	dj_report.device_index = 0xFF;
-	dj_report.report_type = REPORT_TYPE_CMD_SWITCH;
-	dj_report.report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x1F;
-	dj_report.report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout;
-	return logi_dj_recv_send_report(djrcv_dev, &dj_report);
+	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
+	if (!dj_report)
+		return -ENOMEM;
+	dj_report->report_id = REPORT_ID_DJ_SHORT;
+	dj_report->device_index = 0xFF;
+	dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
+	dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
+	dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout;
+	retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
+	kfree(dj_report);
+
+	/*
+	 * Ugly sleep to work around a USB 3.0 bug when the receiver is still
+	 * processing the "switch-to-dj" command while we send an other command.
+	 * 50 msec should gives enough time to the receiver to be ready.
+	 */
+	msleep(50);
+
+	return retval;
 }
 
 
@@ -463,19 +540,48 @@ static void logi_dj_ll_close(struct hid_device *hid)
 	dbg_hid("%s:%s\n", __func__, hid->phys);
 }
 
-static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
-					size_t count,
-					unsigned char report_type)
+static int logi_dj_ll_raw_request(struct hid_device *hid,
+				  unsigned char reportnum, __u8 *buf,
+				  size_t count, unsigned char report_type,
+				  int reqtype)
 {
-	/* Called by hid raw to send data */
-	dbg_hid("%s\n", __func__);
+	struct dj_device *djdev = hid->driver_data;
+	struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
+	u8 *out_buf;
+	int ret;
 
-	return 0;
+	if (buf[0] != REPORT_TYPE_LEDS)
+		return -EINVAL;
+
+	out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
+	if (!out_buf)
+		return -ENOMEM;
+
+	if (count < DJREPORT_SHORT_LENGTH - 2)
+		count = DJREPORT_SHORT_LENGTH - 2;
+
+	out_buf[0] = REPORT_ID_DJ_SHORT;
+	out_buf[1] = djdev->device_index;
+	memcpy(out_buf + 2, buf, count);
+
+	ret = hid_hw_raw_request(djrcv_dev->hdev, out_buf[0], out_buf,
+		DJREPORT_SHORT_LENGTH, report_type, reqtype);
+
+	kfree(out_buf);
+	return ret;
+}
+
+static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size)
+{
+	memcpy(rdesc + *rsize, data, size);
+	*rsize += size;
 }
 
 static int logi_dj_ll_parse(struct hid_device *hid)
 {
 	struct dj_device *djdev = hid->driver_data;
+	unsigned int rsize = 0;
+	char *rdesc;
 	int retval;
 
 	dbg_hid("%s\n", __func__);
@@ -483,70 +589,38 @@ static int logi_dj_ll_parse(struct hid_device *hid)
 	djdev->hdev->version = 0x0111;
 	djdev->hdev->country = 0x00;
 
+	rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
+	if (!rdesc)
+		return -ENOMEM;
+
 	if (djdev->reports_supported & STD_KEYBOARD) {
 		dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
 			__func__, djdev->reports_supported);
-		retval = hid_parse_report(hid,
-					  (u8 *) kbd_descriptor,
-					  sizeof(kbd_descriptor));
-		if (retval) {
-			dbg_hid("%s: sending a kbd descriptor, hid_parse failed"
-				" error: %d\n", __func__, retval);
-			return retval;
-		}
+		rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
 	}
 
 	if (djdev->reports_supported & STD_MOUSE) {
 		dbg_hid("%s: sending a mouse descriptor, reports_supported: "
 			"%x\n", __func__, djdev->reports_supported);
-		retval = hid_parse_report(hid,
-					  (u8 *) mse_descriptor,
-					  sizeof(mse_descriptor));
-		if (retval) {
-			dbg_hid("%s: sending a mouse descriptor, hid_parse "
-				"failed error: %d\n", __func__, retval);
-			return retval;
-		}
+		rdcat(rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor));
 	}
 
 	if (djdev->reports_supported & MULTIMEDIA) {
 		dbg_hid("%s: sending a multimedia report descriptor: %x\n",
 			__func__, djdev->reports_supported);
-		retval = hid_parse_report(hid,
-					  (u8 *) consumer_descriptor,
-					  sizeof(consumer_descriptor));
-		if (retval) {
-			dbg_hid("%s: sending a consumer_descriptor, hid_parse "
-				"failed error: %d\n", __func__, retval);
-			return retval;
-		}
+		rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
 	}
 
 	if (djdev->reports_supported & POWER_KEYS) {
 		dbg_hid("%s: sending a power keys report descriptor: %x\n",
 			__func__, djdev->reports_supported);
-		retval = hid_parse_report(hid,
-					  (u8 *) syscontrol_descriptor,
-					  sizeof(syscontrol_descriptor));
-		if (retval) {
-			dbg_hid("%s: sending a syscontrol_descriptor, "
-				"hid_parse failed error: %d\n",
-				__func__, retval);
-			return retval;
-		}
+		rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
 	}
 
 	if (djdev->reports_supported & MEDIA_CENTER) {
 		dbg_hid("%s: sending a media center report descriptor: %x\n",
 			__func__, djdev->reports_supported);
-		retval = hid_parse_report(hid,
-					  (u8 *) media_descriptor,
-					  sizeof(media_descriptor));
-		if (retval) {
-			dbg_hid("%s: sending a media_descriptor, hid_parse "
-				"failed error: %d\n", __func__, retval);
-			return retval;
-		}
+		rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
 	}
 
 	if (djdev->reports_supported & KBD_LEDS) {
@@ -554,51 +628,10 @@ static int logi_dj_ll_parse(struct hid_device *hid)
 			__func__, djdev->reports_supported);
 	}
 
-	return 0;
-}
-
-static int logi_dj_ll_input_event(struct input_dev *dev, unsigned int type,
-				  unsigned int code, int value)
-{
-	/* Sent by the input layer to handle leds and Force Feedback */
-	struct hid_device *dj_hiddev = input_get_drvdata(dev);
-	struct dj_device *dj_dev = dj_hiddev->driver_data;
-
-	struct dj_receiver_dev *djrcv_dev =
-	    dev_get_drvdata(dj_hiddev->dev.parent);
-	struct hid_device *dj_rcv_hiddev = djrcv_dev->hdev;
-	struct hid_report_enum *output_report_enum;
-
-	struct hid_field *field;
-	struct hid_report *report;
-	unsigned char data[8];
-	int offset;
-
-	dbg_hid("%s: %s, type:%d | code:%d | value:%d\n",
-		__func__, dev->phys, type, code, value);
-
-	if (type != EV_LED)
-		return -1;
-
-	offset = hidinput_find_field(dj_hiddev, type, code, &field);
-
-	if (offset == -1) {
-		dev_warn(&dev->dev, "event field not found\n");
-		return -1;
-	}
-	hid_set_field(field, offset, value);
-	hid_output_report(field->report, &data[0]);
-
-	output_report_enum = &dj_rcv_hiddev->report_enum[HID_OUTPUT_REPORT];
-	report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
-	hid_set_field(report->field[0], 0, dj_dev->device_index);
-	hid_set_field(report->field[0], 1, REPORT_TYPE_LEDS);
-	hid_set_field(report->field[0], 2, data[1]);
-
-	usbhid_submit_report(dj_rcv_hiddev, report, USB_DIR_OUT);
-
-	return 0;
+	retval = hid_parse_report(hid, rdesc, rsize);
+	kfree(rdesc);
 
+	return retval;
 }
 
 static int logi_dj_ll_start(struct hid_device *hid)
@@ -619,7 +652,7 @@ static struct hid_ll_driver logi_dj_ll_driver = {
 	.stop = logi_dj_ll_stop,
 	.open = logi_dj_ll_open,
 	.close = logi_dj_ll_close,
-	.hidinput_input_event = logi_dj_ll_input_event,
+	.raw_request = logi_dj_ll_raw_request,
 };
 
 
@@ -735,6 +768,12 @@ static int logi_dj_probe(struct hid_device *hdev,
 		goto hid_parse_fail;
 	}
 
+	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, REPORT_ID_DJ_SHORT,
+				 0, DJREPORT_SHORT_LENGTH - 1)) {
+		retval = -ENODEV;
+		goto hid_parse_fail;
+	}
+
 	/* Starts the usb device and connects to upper interfaces hiddev and
 	 * hidraw */
 	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
@@ -753,13 +792,16 @@ static int logi_dj_probe(struct hid_device *hdev,
 	}
 
 	/* This is enabling the polling urb on the IN endpoint */
-	retval = hdev->ll_driver->open(hdev);
+	retval = hid_hw_open(hdev);
 	if (retval < 0) {
-		dev_err(&hdev->dev, "%s:hdev->ll_driver->open returned "
-			"error:%d\n", __func__, retval);
+		dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
+			__func__, retval);
 		goto llopen_failed;
 	}
 
+	/* Allow incoming packets to arrive: */
+	hid_device_io_start(hdev);
+
 	retval = logi_dj_recv_query_paired_devices(djrcv_dev);
 	if (retval < 0) {
 		dev_err(&hdev->dev, "%s:logi_dj_recv_query_paired_devices "
@@ -770,7 +812,7 @@ static int logi_dj_probe(struct hid_device *hdev,
 	return retval;
 
 logi_dj_recv_query_paired_devices_failed:
-	hdev->ll_driver->close(hdev);
+	hid_hw_close(hdev);
 
 llopen_failed:
 switch_to_dj_mode_fail:
@@ -812,7 +854,7 @@ static void logi_dj_remove(struct hid_device *hdev)
 
 	cancel_work_sync(&djrcv_dev->work);
 
-	hdev->ll_driver->close(hdev);
+	hid_hw_close(hdev);
 	hid_hw_stop(hdev);
 
 	/* I suppose that at this point the only context that can access