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Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/hidp/core.c197
-rw-r--r--net/bluetooth/hidp/hidp.h15
2 files changed, 196 insertions, 16 deletions
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 2429ca2d7b06..5ec12971af6b 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -36,6 +36,7 @@
#include <linux/file.h>
#include <linux/init.h>
#include <linux/wait.h>
+#include <linux/mutex.h>
#include <net/sock.h>
#include <linux/input.h>
@@ -316,24 +317,144 @@ static int hidp_send_report(struct hidp_session *session, struct hid_report *rep
return hidp_queue_report(session, buf, rsize);
}
+static int hidp_get_raw_report(struct hid_device *hid,
+ unsigned char report_number,
+ unsigned char *data, size_t count,
+ unsigned char report_type)
+{
+ struct hidp_session *session = hid->driver_data;
+ struct sk_buff *skb;
+ size_t len;
+ int numbered_reports = hid->report_enum[report_type].numbered;
+
+ switch (report_type) {
+ case HID_FEATURE_REPORT:
+ report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE;
+ break;
+ case HID_INPUT_REPORT:
+ report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT;
+ break;
+ case HID_OUTPUT_REPORT:
+ report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (mutex_lock_interruptible(&session->report_mutex))
+ return -ERESTARTSYS;
+
+ /* Set up our wait, and send the report request to the device. */
+ session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK;
+ session->waiting_report_number = numbered_reports ? report_number : -1;
+ set_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ data[0] = report_number;
+ if (hidp_send_ctrl_message(hid->driver_data, report_type, data, 1))
+ goto err_eio;
+
+ /* Wait for the return of the report. The returned report
+ gets put in session->report_return. */
+ while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) {
+ int res;
+
+ res = wait_event_interruptible_timeout(session->report_queue,
+ !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags),
+ 5*HZ);
+ if (res == 0) {
+ /* timeout */
+ goto err_eio;
+ }
+ if (res < 0) {
+ /* signal */
+ goto err_restartsys;
+ }
+ }
+
+ skb = session->report_return;
+ if (skb) {
+ len = skb->len < count ? skb->len : count;
+ memcpy(data, skb->data, len);
+
+ kfree_skb(skb);
+ session->report_return = NULL;
+ } else {
+ /* Device returned a HANDSHAKE, indicating protocol error. */
+ len = -EIO;
+ }
+
+ clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ mutex_unlock(&session->report_mutex);
+
+ return len;
+
+err_restartsys:
+ clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ mutex_unlock(&session->report_mutex);
+ return -ERESTARTSYS;
+err_eio:
+ clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ mutex_unlock(&session->report_mutex);
+ return -EIO;
+}
+
static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
unsigned char report_type)
{
+ struct hidp_session *session = hid->driver_data;
+ int ret;
+
switch (report_type) {
case HID_FEATURE_REPORT:
report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
break;
case HID_OUTPUT_REPORT:
- report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
+ report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT;
break;
default:
return -EINVAL;
}
+ if (mutex_lock_interruptible(&session->report_mutex))
+ return -ERESTARTSYS;
+
+ /* Set up our wait, and send the report request to the device. */
+ set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
if (hidp_send_ctrl_message(hid->driver_data, report_type,
- data, count))
- return -ENOMEM;
- return count;
+ data, count)) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* Wait for the ACK from the device. */
+ while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) {
+ int res;
+
+ res = wait_event_interruptible_timeout(session->report_queue,
+ !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags),
+ 10*HZ);
+ if (res == 0) {
+ /* timeout */
+ ret = -EIO;
+ goto err;
+ }
+ if (res < 0) {
+ /* signal */
+ ret = -ERESTARTSYS;
+ goto err;
+ }
+ }
+
+ if (!session->output_report_success) {
+ ret = -EIO;
+ goto err;
+ }
+
+ ret = count;
+
+err:
+ clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
+ mutex_unlock(&session->report_mutex);
+ return ret;
}
static void hidp_idle_timeout(unsigned long arg)
@@ -360,16 +481,22 @@ static void hidp_process_handshake(struct hidp_session *session,
unsigned char param)
{
BT_DBG("session %p param 0x%02x", session, param);
+ session->output_report_success = 0; /* default condition */
switch (param) {
case HIDP_HSHK_SUCCESSFUL:
/* FIXME: Call into SET_ GET_ handlers here */
+ session->output_report_success = 1;
break;
case HIDP_HSHK_NOT_READY:
case HIDP_HSHK_ERR_INVALID_REPORT_ID:
case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
case HIDP_HSHK_ERR_INVALID_PARAMETER:
+ if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) {
+ clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ wake_up_interruptible(&session->report_queue);
+ }
/* FIXME: Call into SET_ GET_ handlers here */
break;
@@ -388,6 +515,12 @@ static void hidp_process_handshake(struct hidp_session *session,
HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
break;
}
+
+ /* Wake up the waiting thread. */
+ if (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) {
+ clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
+ wake_up_interruptible(&session->report_queue);
+ }
}
static void hidp_process_hid_control(struct hidp_session *session,
@@ -406,9 +539,11 @@ static void hidp_process_hid_control(struct hidp_session *session,
}
}
-static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
+/* Returns true if the passed-in skb should be freed by the caller. */
+static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
unsigned char param)
{
+ int done_with_skb = 1;
BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
switch (param) {
@@ -420,7 +555,6 @@ static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
if (session->hid)
hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
-
break;
case HIDP_DATA_RTYPE_OTHER:
@@ -432,12 +566,27 @@ static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
__hidp_send_ctrl_message(session,
HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
}
+
+ if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
+ param == session->waiting_report_type) {
+ if (session->waiting_report_number < 0 ||
+ session->waiting_report_number == skb->data[0]) {
+ /* hidp_get_raw_report() is waiting on this report. */
+ session->report_return = skb;
+ done_with_skb = 0;
+ clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+ wake_up_interruptible(&session->report_queue);
+ }
+ }
+
+ return done_with_skb;
}
static void hidp_recv_ctrl_frame(struct hidp_session *session,
struct sk_buff *skb)
{
unsigned char hdr, type, param;
+ int free_skb = 1;
BT_DBG("session %p skb %p len %d", session, skb, skb->len);
@@ -457,7 +606,7 @@ static void hidp_recv_ctrl_frame(struct hidp_session *session,
break;
case HIDP_TRANS_DATA:
- hidp_process_data(session, skb, param);
+ free_skb = hidp_process_data(session, skb, param);
break;
default:
@@ -466,7 +615,8 @@ static void hidp_recv_ctrl_frame(struct hidp_session *session,
break;
}
- kfree_skb(skb);
+ if (free_skb)
+ kfree_skb(skb);
}
static void hidp_recv_intr_frame(struct hidp_session *session,
@@ -566,6 +716,8 @@ static int hidp_session(void *arg)
init_waitqueue_entry(&intr_wait, current);
add_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait);
add_wait_queue(sk_sleep(intr_sk), &intr_wait);
+ session->waiting_for_startup = 0;
+ wake_up_interruptible(&session->startup_queue);
while (!atomic_read(&session->terminate)) {
set_current_state(TASK_INTERRUPTIBLE);
@@ -757,6 +909,8 @@ static struct hid_ll_driver hidp_hid_driver = {
.hidinput_input_event = hidp_hidinput_event,
};
+/* This function sets up the hid device. It does not add it
+ to the HID system. That is done in hidp_add_connection(). */
static int hidp_setup_hid(struct hidp_session *session,
struct hidp_connadd_req *req)
{
@@ -796,18 +950,11 @@ static int hidp_setup_hid(struct hidp_session *session,
hid->dev.parent = hidp_get_device(session);
hid->ll_driver = &hidp_hid_driver;
+ hid->hid_get_raw_report = hidp_get_raw_report;
hid->hid_output_raw_report = hidp_output_raw_report;
- err = hid_add_device(hid);
- if (err < 0)
- goto failed;
-
return 0;
-failed:
- hid_destroy_device(hid);
- session->hid = NULL;
-
fault:
kfree(session->rd_data);
session->rd_data = NULL;
@@ -856,6 +1003,10 @@ int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock,
skb_queue_head_init(&session->ctrl_transmit);
skb_queue_head_init(&session->intr_transmit);
+ mutex_init(&session->report_mutex);
+ init_waitqueue_head(&session->report_queue);
+ init_waitqueue_head(&session->startup_queue);
+ session->waiting_for_startup = 1;
session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
session->idle_to = req->idle_to;
@@ -878,6 +1029,14 @@ int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock,
err = kernel_thread(hidp_session, session, CLONE_KERNEL);
if (err < 0)
goto unlink;
+ while (session->waiting_for_startup) {
+ wait_event_interruptible(session->startup_queue,
+ !session->waiting_for_startup);
+ }
+
+ err = hid_add_device(session->hid);
+ if (err < 0)
+ goto err_add_device;
if (session->input) {
hidp_send_ctrl_message(session,
@@ -891,6 +1050,12 @@ int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock,
up_write(&hidp_session_sem);
return 0;
+err_add_device:
+ hid_destroy_device(session->hid);
+ session->hid = NULL;
+ atomic_inc(&session->terminate);
+ hidp_schedule(session);
+
unlink:
hidp_del_timer(session);
diff --git a/net/bluetooth/hidp/hidp.h b/net/bluetooth/hidp/hidp.h
index 8d934a19da0a..13de5fa03480 100644
--- a/net/bluetooth/hidp/hidp.h
+++ b/net/bluetooth/hidp/hidp.h
@@ -80,6 +80,8 @@
#define HIDP_VIRTUAL_CABLE_UNPLUG 0
#define HIDP_BOOT_PROTOCOL_MODE 1
#define HIDP_BLUETOOTH_VENDOR_ID 9
+#define HIDP_WAITING_FOR_RETURN 10
+#define HIDP_WAITING_FOR_SEND_ACK 11
struct hidp_connadd_req {
int ctrl_sock; // Connected control socket
@@ -154,9 +156,22 @@ struct hidp_session {
struct sk_buff_head ctrl_transmit;
struct sk_buff_head intr_transmit;
+ /* Used in hidp_get_raw_report() */
+ int waiting_report_type; /* HIDP_DATA_RTYPE_* */
+ int waiting_report_number; /* -1 for not numbered */
+ struct mutex report_mutex;
+ struct sk_buff *report_return;
+ wait_queue_head_t report_queue;
+
+ /* Used in hidp_output_raw_report() */
+ int output_report_success; /* boolean */
+
/* Report descriptor */
__u8 *rd_data;
uint rd_size;
+
+ wait_queue_head_t startup_queue;
+ int waiting_for_startup;
};
static inline void hidp_schedule(struct hidp_session *session)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-01 08:14:24 +0300