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/*
* SiI8620 Linux Driver
*
* Copyright (C) 2013-2014 Silicon Image, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
* This program is distributed AS-IS WITHOUT ANY WARRANTY of any
* kind, whether express or implied; INCLUDING without the implied warranty
* of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE or NON-INFRINGEMENT.
* See the GNU General Public License for more details at
* http://www.gnu.org/licenses/gpl-2.0.html.
*/
#if (INCLUDE_RBP == 1)
#include <linux/input.h>
#include <linux/cdev.h>
#include <linux/hrtimer.h>
#include "si_fw_macros.h"
#include "si_infoframe.h"
#include "si_edid.h"
#include "si_mhl_defs.h"
#include "si_mhl2_edid_3d_api.h"
#include "si_mhl_tx_hw_drv_api.h"
#ifdef MEDIA_DATA_TUNNEL_SUPPORT
#include "si_mdt_inputdev.h"
#endif
#include "mhl_linux_tx.h"
#include "platform.h"
#include "mhl_rbp_inputdev.h"
enum rbp_state_e {
ph0_idle,
ph3_press_and_hold_button,
ph8_hold_mode,
num_rbp_states
};
static char *state_strings[num_rbp_states] = {
"idle",
"press_and_hold_button",
"hold_mode"
};
enum rbp_event_e {
rbp_normal_button_press,
rbp_normal_button_press_same,
rbp_normal_button_release,
rbp_normal_button_release_same,
rbp_press_and_hold_button_press,
rbp_press_and_hold_button_press_same,
rbp_press_and_hold_button_release,
rbp_press_and_hold_button_release_same,
rbp_T_hold_maintain_expired,
rbp_T_press_mode_expired,
num_rbp_events
};
static char *event_strings[num_rbp_events] = {
"normal_button_press",
"normal_button_press_same",
"normal_button_release",
"normal_button_release_same",
"press_and_hold_button_press",
"press_and_hold_button_press_same",
"press_and_hold_button_release",
"press_and_hold_button_release_same",
"rbp_T_hold_maintain_expired",
"rbp_T_press_mode_expired"
};
enum rbp_state_e current_rbp_state = ph0_idle;
uint8_t rbp_previous_button = 0, rbp_current_button = 0;
static int rbp_trigger_button_action(struct mhl_dev_context *dev_context,
uint8_t index, bool press_release)
{
int status = -EINVAL;
if (dev_context->rbp_input_dev) {
input_report_key(dev_context->rbp_input_dev, index,
press_release);
input_sync(dev_context->rbp_input_dev);
status = 0;
}
return status;
}
static int handle_rbp_event(struct mhl_dev_context *dev_context,
uint8_t current_button, uint8_t prev_button, enum rbp_event_e event)
{
int status = 0;
uint8_t current_index = current_button & MHL_RBP_BUTTON_ID_MASK;
uint8_t prev_index = prev_button & MHL_RBP_BUTTON_ID_MASK;
MHL_TX_DBG_ERR("received 0x%02x: %s(%d) in state: %s(%d)\n",
current_button, event_strings[event], event,
state_strings[current_rbp_state], current_rbp_state);
/* now process the event according to the current state */
switch (current_rbp_state) {
case ph0_idle:
switch (event) {
case rbp_normal_button_press:
case rbp_normal_button_press_same:
status =
rbp_trigger_button_action(dev_context,
current_index, 1);
/* no update for current_rbp_state */
break;
case rbp_normal_button_release:
case rbp_normal_button_release_same:
status =
rbp_trigger_button_action(dev_context,
current_index, 0);
/* no update for current_rbp_state */
break;
case rbp_press_and_hold_button_press:
case rbp_press_and_hold_button_press_same:
mhl_tx_start_timer(dev_context,
dev_context->timer_T_press_mode,
T_PRESS_MODE);
current_rbp_state = ph3_press_and_hold_button;
break;
case rbp_press_and_hold_button_release:
case rbp_press_and_hold_button_release_same:
MHL_TX_DBG_ERR("unexpected %s(%d) in state: %s(%d)\n",
event_strings[event], event,
state_strings[current_rbp_state],
current_rbp_state);
break;
default:
MHL_TX_DBG_ERR("unexpected event: %d in state: %d\n",
event, current_rbp_state);
/* no update for current_rbp_state */
status = -EINVAL;
}
break;
case ph3_press_and_hold_button:
switch (event) {
case rbp_normal_button_press:
case rbp_normal_button_press_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_press_mode);
rbp_trigger_button_action(dev_context, prev_index, 0);
/* OK to overwrite status */
status =
rbp_trigger_button_action(dev_context,
current_index, 1);
current_rbp_state = ph0_idle;
break;
case rbp_normal_button_release:
case rbp_normal_button_release_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_press_mode);
rbp_trigger_button_action(dev_context, prev_index, 0);
rbp_trigger_button_action(dev_context, current_index,
1);
status =
rbp_trigger_button_action(dev_context,
current_index, 0);
current_rbp_state = ph0_idle;
break;
case rbp_press_and_hold_button_press:
mhl_tx_start_timer(dev_context,
dev_context->timer_T_press_mode,
T_PRESS_MODE);
status =
rbp_trigger_button_action(dev_context, prev_index,
1);
/* no update for current_rbp_state */
break;
case rbp_press_and_hold_button_press_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_press_mode);
mhl_tx_start_timer(dev_context,
dev_context->timer_T_hold_maintain,
T_HOLD_MAINTAIN);
status =
rbp_trigger_button_action(dev_context, prev_index,
1);
current_rbp_state = ph8_hold_mode;
break;
case rbp_press_and_hold_button_release:
case rbp_press_and_hold_button_release_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_press_mode);
status =
rbp_trigger_button_action(dev_context, prev_index,
0);
current_rbp_state = ph0_idle;
break;
case rbp_T_press_mode_expired:
mhl_tx_start_timer(dev_context,
dev_context->timer_T_hold_maintain,
T_HOLD_MAINTAIN);
status =
rbp_trigger_button_action(dev_context, prev_index,
0);
current_rbp_state = ph8_hold_mode;
break;
default:
MHL_TX_DBG_ERR("unexpected event: %d in state: %d\n",
event, current_rbp_state);
/* no update for current_rbp_state */
status = -EINVAL;
}
break;
case ph8_hold_mode:
switch (event) {
case rbp_normal_button_press:
case rbp_normal_button_press_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_hold_maintain);
rbp_trigger_button_action(dev_context, prev_index, 0);
status =
rbp_trigger_button_action(dev_context,
current_index, 1);
current_rbp_state = ph0_idle;
break;
case rbp_normal_button_release:
case rbp_normal_button_release_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_hold_maintain);
rbp_trigger_button_action(dev_context, prev_index, 0);
rbp_trigger_button_action(dev_context, current_index,
1);
status =
rbp_trigger_button_action(dev_context,
current_index, 0);
current_rbp_state = ph0_idle;
break;
case rbp_press_and_hold_button_press:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_hold_maintain);
mhl_tx_start_timer(dev_context,
dev_context->timer_T_press_mode,
T_PRESS_MODE);
status =
rbp_trigger_button_action(dev_context, prev_index,
1);
current_rbp_state = ph3_press_and_hold_button;
break;
case rbp_press_and_hold_button_press_same:
mhl_tx_start_timer(dev_context,
dev_context->timer_T_hold_maintain,
T_HOLD_MAINTAIN);
status =
rbp_trigger_button_action(dev_context, prev_index,
1);
/* no update for current_rbp_state */
break;
case rbp_press_and_hold_button_release:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_hold_maintain);
rbp_trigger_button_action(dev_context, prev_index, 0);
rbp_trigger_button_action(dev_context, current_index,
1);
status =
rbp_trigger_button_action(dev_context,
current_index, 0);
current_rbp_state = ph0_idle;
break;
case rbp_press_and_hold_button_release_same:
mhl_tx_stop_timer(dev_context,
dev_context->timer_T_hold_maintain);
status =
rbp_trigger_button_action(dev_context, prev_index,
0);
current_rbp_state = ph0_idle;
break;
case rbp_T_hold_maintain_expired:
status =
rbp_trigger_button_action(dev_context, prev_index,
0);
current_rbp_state = ph0_idle;
break;
default:
MHL_TX_DBG_ERR("unexpected event: %d in state: %d\n",
event, current_rbp_state);
/* no update for current_rbp_state */
status = -EINVAL;
}
break;
default:
MHL_TX_DBG_ERR("irrational state value:%d\n",
current_rbp_state);
}
return status;
}
int generate_rbp_input_event(struct mhl_dev_context *dev_context,
uint8_t rbp_buttoncode)
{
/*
Since, in MHL, bit 7 == 1 indicates button release,
and, in Linux, zero means button release,
we use XOR (^) to invert the sense.
*/
enum rbp_event_e event;
int mhl_button_press;
int status = -EINVAL;
int index = rbp_buttoncode & MHL_RBP_BUTTON_ID_MASK;
switch (index) {
case RBP_CALL_ANSWER:
case RBP_CALL_END:
case RBP_CALL_TOGGLE:
case RBP_CALL_MUTE:
case RBP_CALL_DECLINE:
case RBP_OCTOTHORPE:
case RBP_ASTERISK:
case RBP_ROTATE_CLKWISE:
case RBP_ROTATE_COUNTERCLKWISE:
case RBP_SCREEN_PAGE_NEXT:
case RBP_SCREEN_PAGE_PREV:
case RBP_SCREEN_PAGE_UP:
case RBP_SCREEN_PAGE_DN:
case RBP_SCREEN_PAGE_LEFT:
case RBP_SCREEN_PAGE_RIGHT:
break;
default:
return 1;
}
mhl_button_press =
(rbp_buttoncode & MHL_RBP_BUTTON_RELEASED_MASK) ? 0 : 1;
if (mhl_button_press) {
if (index == rbp_previous_button)
event = rbp_press_and_hold_button_press_same;
else
event = rbp_press_and_hold_button_press;
} else {
if (index == rbp_previous_button)
event = rbp_press_and_hold_button_release_same;
else
event = rbp_press_and_hold_button_release;
}
status = handle_rbp_event(dev_context, rbp_buttoncode,
rbp_current_button, event);
rbp_previous_button = rbp_current_button;
rbp_current_button = rbp_buttoncode;
return status;
}
#endif
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