diff options
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/hidp/core.c | 197 | ||||
| -rw-r--r-- | net/bluetooth/hidp/hidp.h | 15 |
2 files changed, 196 insertions, 16 deletions
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index 29544c2..3c036b0 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> @@ -313,24 +314,144 @@ 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) @@ -357,16 +478,22 @@ 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; @@ -385,6 +512,12 @@ 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, @@ -403,9 +536,11 @@ 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) { @@ -417,7 +552,6 @@ 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: @@ -429,12 +563,27 @@ 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); @@ -454,7 +603,7 @@ 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: @@ -463,7 +612,8 @@ 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, @@ -563,6 +713,8 @@ 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); @@ -754,6 +906,8 @@ 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) { @@ -793,18 +947,11 @@ 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; @@ -853,6 +1000,10 @@ 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; @@ -875,6 +1026,14 @@ 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, @@ -888,6 +1047,12 @@ 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 8d934a1..13de5fa 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) |
