diff options
Diffstat (limited to 'btif/co/bta_hh_co.c')
| -rw-r--r-- | btif/co/bta_hh_co.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/btif/co/bta_hh_co.c b/btif/co/bta_hh_co.c new file mode 100644 index 0000000..81414d2 --- /dev/null +++ b/btif/co/bta_hh_co.c @@ -0,0 +1,276 @@ +/****************************************************************************** + * + * 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 <ctype.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <stdint.h> +#include <errno.h> +#include <linux/uhid.h> +#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; + } +} + + |