/****************************************************************************** * * Copyright (C) 2009-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ //#if (defined(BTA_HH_INCLUDED) && (BTA_HH_INCLUDED == TRUE)) #include #include #include #include #include #include #include #include "btif_hh.h" #include "bta_api.h" #include "bta_hh_api.h" const char *dev_path = "/dev/uhid"; /*Internal function to perform UHID write and error checking*/ static int uhid_write(int fd, const struct uhid_event *ev) { ssize_t ret; ret = write(fd, ev, sizeof(*ev)); if (ret < 0){ int rtn = -errno; APPL_TRACE_ERROR2("%s: Cannot write to uhid:%s",__FUNCTION__,strerror(errno)); return rtn; } else if (ret != sizeof(*ev)) { APPL_TRACE_ERROR3("%s: Wrong size written to uhid: %ld != %lu", __FUNCTION__, ret, sizeof(*ev)); return -EFAULT; } else { return 0; } } void bta_hh_co_destroy(int fd) { struct uhid_event ev; memset(&ev, 0, sizeof(ev)); ev.type = UHID_DESTROY; uhid_write(fd, &ev); close(fd); } int bta_hh_co_write(int fd, UINT8* rpt, UINT16 len) { APPL_TRACE_DEBUG0("bta_hh_co_data: UHID write"); struct uhid_event ev; memset(&ev, 0, sizeof(ev)); ev.type = UHID_INPUT; ev.u.input.size = len; if(len > sizeof(ev.u.input.data)){ APPL_TRACE_WARNING1("%s:report size greater than allowed size",__FUNCTION__); return -1; } memcpy(ev.u.input.data, rpt, len); return uhid_write(fd, &ev); } /******************************************************************************* ** ** Function bta_hh_co_open ** ** Description When connection is opened, this call-out function is executed ** by HH to do platform specific initialization. ** ** Returns void. *******************************************************************************/ void bta_hh_co_open(UINT8 dev_handle, UINT8 sub_class, tBTA_HH_ATTR_MASK attr_mask, UINT8 app_id) { UINT32 i; btif_hh_device_t *p_dev = NULL; if (dev_handle == BTA_HH_INVALID_HANDLE) { APPL_TRACE_WARNING2("%s: Oops, dev_handle (%d) is invalid...", __FUNCTION__, dev_handle); return; } for (i = 0; i < BTIF_HH_MAX_HID; i++) { p_dev = &btif_hh_cb.devices[i]; if (p_dev->dev_status != BTHH_CONN_STATE_UNKNOWN && p_dev->dev_handle == dev_handle) { // We found a device with the same handle. Must be a device reconnected. APPL_TRACE_WARNING2("%s: Found an existing device with the same handle " "dev_status = %d",__FUNCTION__, p_dev->dev_status); APPL_TRACE_WARNING6("%s: bd_addr = [%02X:%02X:%02X:%02X:%02X:]", __FUNCTION__, p_dev->bd_addr.address[0], p_dev->bd_addr.address[1], p_dev->bd_addr.address[2], p_dev->bd_addr.address[3], p_dev->bd_addr.address[4]); APPL_TRACE_WARNING4("%s: attr_mask = 0x%04x, sub_class = 0x%02x, app_id = %d", __FUNCTION__, p_dev->attr_mask, p_dev->sub_class, p_dev->app_id); if(p_dev->fd<0) { p_dev->fd = open(dev_path, O_RDWR | O_CLOEXEC); if (p_dev->fd < 0){ APPL_TRACE_ERROR2("%s: Error: failed to open uhid, err:%s", __FUNCTION__,strerror(errno)); }else APPL_TRACE_DEBUG2("%s: uhid fd = %d", __FUNCTION__, p_dev->fd); } break; } p_dev = NULL; } if (p_dev == NULL) { // Did not find a device reconnection case. Find an empty slot now. for (i = 0; i < BTIF_HH_MAX_HID; i++) { if (btif_hh_cb.devices[i].dev_status == BTHH_CONN_STATE_UNKNOWN) { p_dev = &btif_hh_cb.devices[i]; p_dev->dev_handle = dev_handle; p_dev->attr_mask = attr_mask; p_dev->sub_class = sub_class; p_dev->app_id = app_id; btif_hh_cb.device_num++; // This is a new device,open the uhid driver now. p_dev->fd = open(dev_path, O_RDWR | O_CLOEXEC); if (p_dev->fd < 0){ APPL_TRACE_ERROR2("%s: Error: failed to open uhid, err:%s", __FUNCTION__,strerror(errno)); }else APPL_TRACE_DEBUG2("%s: uhid fd = %d", __FUNCTION__, p_dev->fd); break; } } } if (p_dev == NULL) { APPL_TRACE_ERROR1("%s: Error: too many HID devices are connected", __FUNCTION__); return; } p_dev->dev_status = BTHH_CONN_STATE_CONNECTED; APPL_TRACE_DEBUG2("%s: Return device status %d", __FUNCTION__, p_dev->dev_status); } /******************************************************************************* ** ** Function bta_hh_co_close ** ** Description When connection is closed, this call-out function is executed ** by HH to do platform specific finalization. ** ** Parameters dev_handle - device handle ** app_id - application id ** ** Returns void. *******************************************************************************/ void bta_hh_co_close(UINT8 dev_handle, UINT8 app_id) { APPL_TRACE_WARNING3("%s: dev_handle = %d, app_id = %d", __FUNCTION__, dev_handle, app_id); } /******************************************************************************* ** ** Function bta_hh_co_data ** ** Description This function is executed by BTA when HID host receive a data ** report. ** ** Parameters dev_handle - device handle ** *p_rpt - pointer to the report data ** len - length of report data ** mode - Hid host Protocol Mode ** sub_clas - Device Subclass ** app_id - application id ** ** Returns void *******************************************************************************/ void bta_hh_co_data(UINT8 dev_handle, UINT8 *p_rpt, UINT16 len, tBTA_HH_PROTO_MODE mode, UINT8 sub_class, UINT8 ctry_code, BD_ADDR peer_addr, UINT8 app_id) { btif_hh_device_t *p_dev; APPL_TRACE_DEBUG6("%s: dev_handle = %d, subclass = 0x%02X, mode = %d, " "ctry_code = %d, app_id = %d", __FUNCTION__, dev_handle, sub_class, mode, ctry_code, app_id); p_dev = btif_hh_find_connected_dev_by_handle(dev_handle); if (p_dev == NULL) { APPL_TRACE_WARNING2("%s: Error: unknown HID device handle %d", __FUNCTION__, dev_handle); return; } // Send the HID report to the kernel. if (p_dev->fd >= 0) { bta_hh_co_write(p_dev->fd, p_rpt, len); }else { APPL_TRACE_WARNING3("%s: Error: fd = %d, len = %d", __FUNCTION__, p_dev->fd, len); } } /******************************************************************************* ** ** Function bta_hh_co_send_hid_info ** ** Description This function is called in btif_hh.c to process DSCP received. ** ** Parameters dev_handle - device handle ** dscp_len - report descriptor length ** *p_dscp - report descriptor ** ** Returns void *******************************************************************************/ void bta_hh_co_send_hid_info(btif_hh_device_t *p_dev, char *dev_name, UINT16 vendor_id, UINT16 product_id, UINT16 version, UINT8 ctry_code, int dscp_len, UINT8 *p_dscp) { int result; struct uhid_event ev; if (p_dev->fd < 0) { APPL_TRACE_WARNING3("%s: Error: fd = %d, dscp_len = %d", __FUNCTION__, p_dev->fd, dscp_len); return; } APPL_TRACE_WARNING4("%s: fd = %d, name = [%s], dscp_len = %d", __FUNCTION__, p_dev->fd, dev_name, dscp_len); APPL_TRACE_WARNING5("%s: vendor_id = 0x%04x, product_id = 0x%04x, version= 0x%04x," "ctry_code=0x%02x",__FUNCTION__, vendor_id, product_id, version, ctry_code); //Create and send hid descriptor to kernel memset(&ev, 0, sizeof(ev)); ev.type = UHID_CREATE; strncpy((char*)ev.u.create.name, dev_name, sizeof(ev.u.create.name) - 1); ev.u.create.rd_size = dscp_len; ev.u.create.rd_data = p_dscp; ev.u.create.bus = BUS_BLUETOOTH; ev.u.create.vendor = vendor_id; ev.u.create.product = product_id; ev.u.create.version = version; ev.u.create.country = ctry_code; result = uhid_write(p_dev->fd, &ev); APPL_TRACE_WARNING4("%s: fd = %d, dscp_len = %d, result = %d", __FUNCTION__, p_dev->fd, dscp_len, result); if (result) { APPL_TRACE_WARNING2("%s: Error: failed to send DSCP, result = %d", __FUNCTION__, result); /* The HID report descriptor is corrupted. Close the driver. */ close(p_dev->fd); p_dev->fd = -1; } }