esp-idf/components/bt/host/bluedroid/bta/hh/bta_hh_utils.c

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/******************************************************************************
*
* Copyright (C) 2005-2012 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.
*
******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
#if defined(BTA_HH_INCLUDED) && (BTA_HH_INCLUDED == TRUE)
#include "osi/allocator.h"
#include "bta_hh_int.h"
/* if SSR max latency is not defined by remote device, set the default value
as half of the link supervision timeout */
#define BTA_HH_GET_DEF_SSR_MAX_LAT(x) ((x)>> 1)
/*****************************************************************************
** Constants
*****************************************************************************/
#define BTA_HH_KB_CTRL_MASK 0x11
#define BTA_HH_KB_SHIFT_MASK 0x22
#define BTA_HH_KB_ALT_MASK 0x44
#define BTA_HH_KB_GUI_MASK 0x88
#define BTA_HH_KB_CAPS_LOCK 0x39 /* caps lock */
#define BTA_HH_KB_NUM_LOCK 0x53 /* num lock */
#define BTA_HH_MAX_RPT_CHARS 8
static const UINT8 bta_hh_mod_key_mask[BTA_HH_MOD_MAX_KEY] = {
BTA_HH_KB_CTRL_MASK,
BTA_HH_KB_SHIFT_MASK,
BTA_HH_KB_ALT_MASK,
BTA_HH_KB_GUI_MASK
};
/*******************************************************************************
**
** Function bta_hh_find_cb
**
** Description Find best available control block according to BD address.
**
**
** Returns void
**
*******************************************************************************/
UINT8 bta_hh_find_cb(BD_ADDR bda)
{
UINT8 xx;
/* See how many active devices there are. */
for (xx = 0; xx < BTA_HH_MAX_DEVICE; xx++) {
/* check if any active/known devices is a match */
if ((!bdcmp (bda, bta_hh_cb.kdev[xx].addr) &&
bdcmp(bda, bd_addr_null) != 0) ) {
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("found kdev_cb[%d] hid_handle = %d ", xx,
bta_hh_cb.kdev[xx].hid_handle)
#endif
return xx;
}
#if BTA_HH_DEBUG
else {
APPL_TRACE_DEBUG("in_use ? [%d] kdev[%d].hid_handle = %d state = [%d]",
bta_hh_cb.kdev[xx].in_use, xx,
bta_hh_cb.kdev[xx].hid_handle,
bta_hh_cb.kdev[xx].state);
}
#endif
}
/* if no active device match, find a spot for it */
for (xx = 0; xx < BTA_HH_MAX_DEVICE; xx++) {
if (!bta_hh_cb.kdev[xx].in_use) {
bdcpy(bta_hh_cb.kdev[xx].addr, bda);
break;
}
}
/* If device list full, report BTA_HH_IDX_INVALID */
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("bta_hh_find_cb:: index = %d while max = %d",
xx, BTA_HH_MAX_DEVICE);
#endif
if (xx == BTA_HH_MAX_DEVICE) {
xx = BTA_HH_IDX_INVALID;
}
return xx;
}
/*******************************************************************************
**
** Function bta_hh_clean_up_kdev
**
** Description Clean up device control block when device is removed from
** manitainace list, and update control block index map.
**
** Returns void
**
*******************************************************************************/
void bta_hh_clean_up_kdev(tBTA_HH_DEV_CB *p_cb)
{
UINT8 index;
if (p_cb->hid_handle != BTA_HH_INVALID_HANDLE ) {
#if BTA_HH_LE_INCLUDED == TRUE
if (p_cb->is_le_device) {
bta_hh_cb.le_cb_index[BTA_HH_GET_LE_CB_IDX(p_cb->hid_handle)] = BTA_HH_IDX_INVALID;
} else
#endif
{
bta_hh_cb.cb_index[p_cb->hid_handle] = BTA_HH_IDX_INVALID;
}
}
/* reset device control block */
index = p_cb->index; /* Preserve index for this control block */
/* Free buffer for report descriptor info */
utl_freebuf((void **)&p_cb->dscp_info.descriptor.dsc_list);
memset(p_cb, 0, sizeof (tBTA_HH_DEV_CB)); /* Reset control block */
p_cb->index = index; /* Restore index for this control block */
p_cb->state = BTA_HH_IDLE_ST;
p_cb->hid_handle = BTA_HH_INVALID_HANDLE;
}
/*******************************************************************************
**
** Function bta_hh_update_di_info
**
** Description Maintain a known device list for BTA HH.
**
** Returns void
**
*******************************************************************************/
void bta_hh_update_di_info(tBTA_HH_DEV_CB *p_cb, UINT16 vendor_id, UINT16 product_id,
UINT16 version, UINT8 flag)
{
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("vendor_id = 0x%2x product_id = 0x%2x version = 0x%2x",
vendor_id, product_id, version);
#endif
p_cb->dscp_info.vendor_id = vendor_id;
p_cb->dscp_info.product_id = product_id;
p_cb->dscp_info.version = version;
#if (defined BTA_HH_LE_INCLUDED && BTA_HH_LE_INCLUDED == TRUE)
p_cb->dscp_info.flag = flag;
#else
UNUSED(flag);
#endif
}
/*******************************************************************************
**
** Function bta_hh_add_device_to_list
**
** Description Maintain a known device list for BTA HH.
**
** Returns void
**
*******************************************************************************/
void bta_hh_add_device_to_list(tBTA_HH_DEV_CB *p_cb, UINT8 handle,
UINT16 attr_mask,
tHID_DEV_DSCP_INFO *p_dscp_info,
UINT8 sub_class,
UINT16 ssr_max_latency,
UINT16 ssr_min_tout,
UINT8 app_id)
{
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("subclass = 0x%2x", sub_class);
#endif
p_cb->hid_handle = handle;
p_cb->in_use = TRUE;
p_cb->attr_mask = attr_mask;
p_cb->sub_class = sub_class;
p_cb->app_id = app_id;
p_cb->dscp_info.ssr_max_latency = ssr_max_latency;
p_cb->dscp_info.ssr_min_tout = ssr_min_tout;
/* store report descriptor info */
if ( p_dscp_info) {
utl_freebuf((void **)&p_cb->dscp_info.descriptor.dsc_list);
if (p_dscp_info->dl_len &&
(p_cb->dscp_info.descriptor.dsc_list =
(UINT8 *)osi_malloc(p_dscp_info->dl_len)) != NULL) {
p_cb->dscp_info.descriptor.dl_len = p_dscp_info->dl_len;
memcpy(p_cb->dscp_info.descriptor.dsc_list, p_dscp_info->dsc_list,
p_dscp_info->dl_len);
}
}
return;
}
/*******************************************************************************
**
** Function bta_hh_tod_spt
**
** Description Check to see if this type of device is supported
**
** Returns
**
*******************************************************************************/
BOOLEAN bta_hh_tod_spt(tBTA_HH_DEV_CB *p_cb, UINT8 sub_class)
{
UINT8 xx;
UINT8 cod = (sub_class >> 2); /* lower two bits are reserved */
for (xx = 0 ; xx < p_bta_hh_cfg->max_devt_spt; xx ++) {
if (cod == (UINT8) p_bta_hh_cfg->p_devt_list[xx].tod) {
p_cb->app_id = p_bta_hh_cfg->p_devt_list[xx].app_id;
#if BTA_HH_DEBUG
APPL_TRACE_EVENT("bta_hh_tod_spt sub_class:0x%x supported", sub_class);
#endif
return TRUE;
}
}
#if BTA_HH_DEBUG
APPL_TRACE_EVENT("bta_hh_tod_spt sub_class:0x%x NOT supported", sub_class);
#endif
return FALSE;
}
/*******************************************************************************
**
** Function bta_hh_parse_keybd_rpt
**
** Description This utility function parse a boot mode keyboard report.
**
** Returns void
**
*******************************************************************************/
void bta_hh_parse_keybd_rpt(tBTA_HH_BOOT_RPT *p_kb_data, UINT8 *p_report,
UINT16 report_len)
{
tBTA_HH_KB_CB *p_kb = &bta_hh_cb.kb_cb;
tBTA_HH_KEYBD_RPT *p_data = &p_kb_data->data_rpt.keybd_rpt;
UINT8 this_char, ctl_shift;
UINT16 xx, yy, key_idx = 0;
UINT8 this_report[BTA_HH_MAX_RPT_CHARS];
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("bta_hh_parse_keybd_rpt: (report=%p, report_len=%d) called",
p_report, report_len);
#endif
if (report_len < 2) {
return;
}
ctl_shift = *p_report++;
report_len--;
if (report_len > BTA_HH_MAX_RPT_CHARS) {
report_len = BTA_HH_MAX_RPT_CHARS;
}
memset (this_report, 0, BTA_HH_MAX_RPT_CHARS);
memset (p_data, 0, sizeof(tBTA_HH_KEYBD_RPT));
memcpy (this_report, p_report, report_len);
/* Take care of shift, control, GUI and alt, modifier keys */
for (xx = 0; xx < BTA_HH_MOD_MAX_KEY; xx ++ ) {
if (ctl_shift & bta_hh_mod_key_mask[xx]) {
APPL_TRACE_DEBUG("Mod Key[%02x] pressed", bta_hh_mod_key_mask[xx] );
p_kb->mod_key[xx] = TRUE;
} else if (p_kb->mod_key[xx]) {
p_kb->mod_key[xx] = FALSE;
}
/* control key flag is set */
p_data->mod_key[xx] = p_kb->mod_key[xx];
}
/***************************************************************************/
/* First step is to remove all characters we saw in the last report */
/***************************************************************************/
for (xx = 0; xx < report_len; xx++) {
for (yy = 0; yy < BTA_HH_MAX_RPT_CHARS; yy++) {
if (this_report[xx] == p_kb->last_report[yy]) {
this_report[xx] = 0;
}
}
}
/***************************************************************************/
/* Now, process all the characters in the report, up to 6 keycodes */
/***************************************************************************/
for (xx = 0; xx < report_len; xx++) {
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("this_char = %02x", this_report[xx]);
#endif
if ((this_char = this_report[xx]) == 0) {
continue;
}
/* take the key code as the report data */
if (this_report[xx] == BTA_HH_KB_CAPS_LOCK) {
p_kb->caps_lock = p_kb->caps_lock ? FALSE : TRUE;
} else if (this_report[xx] == BTA_HH_KB_NUM_LOCK) {
p_kb->num_lock = p_kb->num_lock ? FALSE : TRUE;
} else {
p_data->this_char[key_idx ++] = this_char;
}
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("found keycode %02x ", this_report[xx]);
#endif
p_data->caps_lock = p_kb->caps_lock;
p_data->num_lock = p_kb->num_lock;
}
memset (p_kb->last_report, 0, BTA_HH_MAX_RPT_CHARS);
memcpy (p_kb->last_report, p_report, report_len);
return;
}
/*******************************************************************************
**
** Function bta_hh_parse_mice_rpt
**
** Description This utility function parse a boot mode mouse report.
**
** Returns void
**
*******************************************************************************/
void bta_hh_parse_mice_rpt(tBTA_HH_BOOT_RPT *p_mice_data, UINT8 *p_report,
UINT16 report_len)
{
tBTA_HH_MICE_RPT *p_data = &p_mice_data->data_rpt.mice_rpt;
#if BTA_HH_DEBUG
UINT8 xx;
APPL_TRACE_DEBUG("bta_hh_parse_mice_rpt: bta_keybd_rpt_rcvd(report=%p, \
report_len=%d) called", p_report, report_len);
#endif
if (report_len < 3) {
return;
}
if (report_len > BTA_HH_MAX_RPT_CHARS) {
report_len = BTA_HH_MAX_RPT_CHARS;
}
#if BTA_HH_DEBUG
for (xx = 0; xx < report_len; xx++) {
APPL_TRACE_DEBUG("this_char = %02x", p_report[xx]);
}
#endif
/* only first bytes lower 3 bits valid */
p_data->mouse_button = (p_report[0] & 0x07);
/* x displacement */
p_data->delta_x = p_report[1];
/* y displacement */
p_data->delta_y = p_report[2];
#if BTA_HH_DEBUG
APPL_TRACE_DEBUG("mice button: 0x%2x", p_data->mouse_button);
APPL_TRACE_DEBUG("mice move: x = %d y = %d", p_data->delta_x,
p_data->delta_y );
#endif
return;
}
/*******************************************************************************
**
** Function bta_hh_read_ssr_param
**
** Description Read the SSR Parameter for the remote device
**
** Returns tBTA_HH_STATUS operation status
**
*******************************************************************************/
tBTA_HH_STATUS bta_hh_read_ssr_param(BD_ADDR bd_addr, UINT16 *p_max_ssr_lat, UINT16 *p_min_ssr_tout)
{
tBTA_HH_STATUS status = BTA_HH_ERR;
tBTA_HH_CB *p_cb = &bta_hh_cb;
UINT8 i;
UINT16 ssr_max_latency;
for (i = 0; i < BTA_HH_MAX_KNOWN; i ++) {
if (memcmp(p_cb->kdev[i].addr, bd_addr, BD_ADDR_LEN) == 0) {
/* if remote device does not have HIDSSRHostMaxLatency attribute in SDP,
set SSR max latency default value here. */
if (p_cb->kdev[i].dscp_info.ssr_max_latency == HID_SSR_PARAM_INVALID) {
/* The default is calculated as half of link supervision timeout.*/
BTM_GetLinkSuperTout(p_cb->kdev[i].addr, &ssr_max_latency) ;
ssr_max_latency = BTA_HH_GET_DEF_SSR_MAX_LAT(ssr_max_latency);
/* per 1.1 spec, if the newly calculated max latency is greater than
BTA_HH_SSR_MAX_LATENCY_DEF which is 500ms, use BTA_HH_SSR_MAX_LATENCY_DEF */
if (ssr_max_latency > BTA_HH_SSR_MAX_LATENCY_DEF) {
ssr_max_latency = BTA_HH_SSR_MAX_LATENCY_DEF;
}
* p_max_ssr_lat = ssr_max_latency;
} else {
* p_max_ssr_lat = p_cb->kdev[i].dscp_info.ssr_max_latency;
}
if (p_cb->kdev[i].dscp_info.ssr_min_tout == HID_SSR_PARAM_INVALID) {
* p_min_ssr_tout = BTA_HH_SSR_MIN_TOUT_DEF;
} else {
* p_min_ssr_tout = p_cb->kdev[i].dscp_info.ssr_min_tout;
}
status = BTA_HH_OK;
break;
}
}
return status;
}
/*******************************************************************************
**
** Function bta_hh_cleanup_disable
**
** Description when disable finished, cleanup control block and send callback
**
**
** Returns void
**
*******************************************************************************/
void bta_hh_cleanup_disable(tBTA_HH_STATUS status)
{
UINT8 xx;
/* free buffer in CB holding report descriptors */
for (xx = 0; xx < BTA_HH_MAX_DEVICE; xx ++) {
utl_freebuf((void **)&bta_hh_cb.kdev[xx].dscp_info.descriptor.dsc_list);
}
utl_freebuf((void **)&bta_hh_cb.p_disc_db);
(* bta_hh_cb.p_cback)(BTA_HH_DISABLE_EVT, (tBTA_HH *)&status);
/* all connections are down, no waiting for diconnect */
memset(&bta_hh_cb, 0, sizeof(tBTA_HH_CB));
}
/*******************************************************************************
**
** Function bta_hh_dev_handle_to_cb_idx
**
** Description convert a HID device handle to the device control block index.
**
**
** Returns UINT8: index of the device control block.
**
*******************************************************************************/
UINT8 bta_hh_dev_handle_to_cb_idx(UINT8 dev_handle)
{
UINT8 index = BTA_HH_IDX_INVALID;
#if BTA_HH_LE_INCLUDED == TRUE
if (BTA_HH_IS_LE_DEV_HDL(dev_handle)) {
if (BTA_HH_IS_LE_DEV_HDL_VALID(dev_handle)) {
index = bta_hh_cb.le_cb_index[BTA_HH_GET_LE_CB_IDX(dev_handle)];
}
#if BTA_HH_DEBUG == TRUE
APPL_TRACE_DEBUG("bta_hh_dev_handle_to_cb_idx dev_handle = %d index = %d", dev_handle, index);
#endif
} else
#endif
{
/* regular HID device checking */
if (dev_handle < BTA_HH_MAX_KNOWN ) {
index = bta_hh_cb.cb_index[dev_handle];
}
}
return index;
}
#if BTA_HH_DEBUG
/*******************************************************************************
**
** Function bta_hh_trace_dev_db
**
** Description Check to see if this type of device is supported
**
** Returns
**
*******************************************************************************/
void bta_hh_trace_dev_db(void)
{
UINT8 xx;
APPL_TRACE_DEBUG("bta_hh_trace_dev_db:: Device DB list********************");
for (xx = 0; xx < BTA_HH_MAX_DEVICE; xx++) {
APPL_TRACE_DEBUG("kdev[%d] in_use[%d] handle[%d] ", xx,
bta_hh_cb.kdev[xx].in_use, bta_hh_cb.kdev[xx].hid_handle);
APPL_TRACE_DEBUG("\t\t\t attr_mask[%04x] state [%d] sub_class[%02x] index = %d",
bta_hh_cb.kdev[xx].attr_mask, bta_hh_cb.kdev[xx].state,
bta_hh_cb.kdev[xx].sub_class, bta_hh_cb.kdev[xx].index);
}
APPL_TRACE_DEBUG("*********************************************************");
}
#endif
#endif /* HL_INCLUDED */