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device_gpio_rpi2.c
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device_gpio_rpi2.c
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/********************************************************************************
* Copyright (C) 2021 Ju, Gyeong-min
********************************************************************************/
#include "build_cfg.h"
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/slab.h>
#include "gpio_util.h"
#include "log_util.h"
#include "parse_util.h"
#define INPUT_GPIO_CONFIG_TYPE_INDEX (0)
#define INPUT_GPIO_CONFIG_TYPE_KEYCODE (1)
typedef struct tag_device_gpio_config {
int pull_updown;
} device_gpio_config_t;
typedef struct tag_device_gpio_index_item {
int gpio;
int button;
int value;
} device_gpio_index_item_t;
typedef struct tag_device_gpio_index_table {
device_gpio_index_item_t buttondef[MAX_INPUT_BUTTON_COUNT];
int pin_count;
int button_start_index;
} device_gpio_index_table_t;
typedef struct tag_device_gpio_data {
device_gpio_config_t device_cfg;
device_gpio_index_table_t button_cfgs[1];
} device_gpio_data_t;
#define INPUT_GPIO_DEFAULT_KEYCODE_TABLE_ITEM_COUNT (13)
static const device_gpio_index_table_t default_input1_gpio_config = {
{
{4, ABS_Y, -DEFAULT_INPUT_ABS_MAX_VALUE},
{17, ABS_Y, DEFAULT_INPUT_ABS_MAX_VALUE},
{27, ABS_X, -DEFAULT_INPUT_ABS_MAX_VALUE},
{22, ABS_X, DEFAULT_INPUT_ABS_MAX_VALUE},
{10, BTN_START, 1},
{9, BTN_SELECT, 1},
{25, BTN_A, 1},
{24, BTN_B, 1},
{15, BTN_X, 1},
{18, BTN_Y, 1},
{14, BTN_TL, 1},
{23, BTN_TR, 1},
{2, BTN_MODE, 1},
},
INPUT_GPIO_DEFAULT_KEYCODE_TABLE_ITEM_COUNT,
0
};
static const device_gpio_index_table_t default_input2_gpio_config = {
{
{11, ABS_Y, -DEFAULT_INPUT_ABS_MAX_VALUE},
{5, ABS_Y, DEFAULT_INPUT_ABS_MAX_VALUE},
{6, ABS_X, -DEFAULT_INPUT_ABS_MAX_VALUE},
{13, ABS_X, DEFAULT_INPUT_ABS_MAX_VALUE},
{19, BTN_START, 1},
{26, BTN_SELECT, 1},
{21, BTN_A, 1},
{20, BTN_B, 1},
{16, BTN_X, 1},
{12, BTN_Y, 1},
{7, BTN_TL, 1},
{8, BTN_TR, 1},
{3, BTN_MODE, 1},
},
INPUT_GPIO_DEFAULT_KEYCODE_TABLE_ITEM_COUNT,
0
};
static const device_gpio_index_table_t default_input3_gpio_config = {
{
{4, ABS_Y, -DEFAULT_INPUT_ABS_MAX_VALUE},
{14, ABS_Y, DEFAULT_INPUT_ABS_MAX_VALUE},
{15, ABS_X, -DEFAULT_INPUT_ABS_MAX_VALUE},
{17, ABS_X, DEFAULT_INPUT_ABS_MAX_VALUE},
{18, BTN_START, 1},
{27, BTN_SELECT, 1},
{22, BTN_A, 1},
{23, BTN_B, 1},
{24, BTN_X, 1},
{10, BTN_Y, 1},
{9, BTN_TL, 1},
{25, BTN_TR, 1},
{11, BTN_MODE, 1},
},
INPUT_GPIO_DEFAULT_KEYCODE_TABLE_ITEM_COUNT,
0
};
// device 파라미터 파싱
static int __parse_device_param_for_gpio(device_gpio_data_t* user_data, char* device_config_str)
{
char szText[512];
char* pText;
char* temp_p;
if (device_config_str != NULL) {
strcpy(szText, device_config_str);
pText = szText;
temp_p = strsep(&pText, ",");
if (temp_p == NULL || strcmp(temp_p, "") == 0 || strcmp(temp_p, "default") == 0) {
user_data->device_cfg.pull_updown = 0;
} else {
user_data->device_cfg.pull_updown = simple_strtol(temp_p, NULL, 10);
}
} else {
user_data->device_cfg.pull_updown = 0;
}
return 0;
}
// 각 endpoint 파라미터 파싱
static int __parse_endpoint_param_for_gpio(device_gpio_data_t* user_data, char* endpoint_config_str[], input_endpoint_data_t *endpoint_list[], int endpoint_count)
{
int i, j;
device_gpio_index_table_t *src, *des;
int code_mode;
char szText[512];
char* pText;
char* temp_p;
des = user_data->button_cfgs;
for (i = 0; i < endpoint_count; i++ ) {
input_endpoint_data_t *ep = endpoint_list[i];
char* cfgtype_p;
int button_start_index, pin_count;
if (ep == NULL) continue;
if (endpoint_config_str[i] != NULL) {
strcpy(szText, endpoint_config_str[i]);
pText = szText;
cfgtype_p = strsep(&pText, ",");
} else {
pText = NULL;
cfgtype_p = NULL;
}
if (cfgtype_p == NULL || strcmp(cfgtype_p, "default1") == 0 || strcmp(cfgtype_p, "default") == 0 || strcmp(cfgtype_p, "") == 0){
src = (device_gpio_index_table_t *)&default_input1_gpio_config;
code_mode = INPUT_CODE_TYPE_KEYCODE;
pin_count = parse_number(&pText, ",", 10, src->pin_count);
button_start_index = parse_number(&pText, ",", 10, 0);
} else if (strcmp(cfgtype_p, "default2") == 0){
src = (device_gpio_index_table_t *)&default_input2_gpio_config;
code_mode = INPUT_CODE_TYPE_KEYCODE;
pin_count = parse_number(&pText, ",", 10, src->pin_count);
button_start_index = parse_number(&pText, ",", 10, 0);
} else if (strcmp(cfgtype_p, "default3") == 0){
src = (device_gpio_index_table_t *)&default_input3_gpio_config;
code_mode = INPUT_CODE_TYPE_KEYCODE;
pin_count = parse_number(&pText, ",", 10, src->pin_count);
button_start_index = parse_number(&pText, ",", 10, 0);
} else if (strcmp(cfgtype_p, "custom") == 0){
temp_p = strsep(&pText, ",");
if (temp_p == NULL || strcmp(temp_p, "keycode") == 0 || strcmp(temp_p, "default") == 0 || strcmp(temp_p, "") == 0) {
code_mode = INPUT_CODE_TYPE_KEYCODE;
} else if (strcmp(temp_p, "index") == 0 || strcmp(temp_p, "1") == 0) {
code_mode = INPUT_CODE_TYPE_INDEX;
} else {
code_mode = INPUT_CODE_TYPE_NONE;
}
button_start_index = 0;
pin_count = 0;
src = &user_data->button_cfgs[i];
while (pText != NULL && pin_count < MAX_INPUT_BUTTON_COUNT) {
char *block_p;
int gpio, button;
strsep(&pText, "{");
block_p = strsep(&pText, "}");
gpio = parse_number(&block_p, ",", 0, -1);
button = parse_number(&block_p, ",", 0, -1);
strsep(&pText, ",");
// 키 설정 추가
if (button >= 0 && gpio >= 0) {
src->buttondef[pin_count].gpio = gpio;
src->buttondef[pin_count].button = button;
src->buttondef[pin_count].value = parse_number(&block_p, ",", 0, 0);
pin_count++;
}
}
} else {
continue;
}
if (code_mode == INPUT_CODE_TYPE_KEYCODE) {
for (j = 0; j < pin_count; j++) {
int idx = find_input_button_data(ep, src->buttondef[j].button, NULL);
des->buttondef[j].button = idx;
if (idx != -1) {
des->buttondef[j].gpio = src->buttondef[j].gpio;
des->buttondef[j].value = src->buttondef[j].value;
}
}
des->pin_count = pin_count;
des->button_start_index = button_start_index;
} else if (code_mode == INPUT_CODE_TYPE_INDEX) {
for (j = 0; j < pin_count; j++) {
des->buttondef[j].button = src->buttondef[j].button;
des->buttondef[j].gpio = src->buttondef[j].gpio;
des->buttondef[j].value = src->buttondef[j].value;
}
des->pin_count = pin_count;
des->button_start_index = button_start_index;
}
des++;
}
return 0;
}
// device_config_str :
// endpoint_config_str : endpoint, config_type (default1 | default2 | custom), ...
// default1: pin_count, start_index
// default2: pin_count, start_index
// custom = code_type (0|1), n * {gpio, button, value}
// code_type = 0 : key code
// code_type = 1 : index
//
// ex) device1=gpio;;0,default1
// device2=gpio;;1,custom,0,{10,0x103,1},{10,0x103,1},{10,0x103,1},{10,0x103,1},{10,0x103,1},{10,0x103,1}
static int init_input_device_for_gpio(void* device_desc_data, input_device_data_t *device_data, char* device_config_str, char* endpoint_config_strs[])
{
device_gpio_data_t* user_data;
int result;
user_data = (device_gpio_data_t *)kzalloc(sizeof(device_gpio_data_t) + sizeof(device_gpio_index_table_t) * (device_data->target_endpoint_count - 1), GFP_KERNEL);
result = __parse_device_param_for_gpio(user_data, device_config_str);
if (result != 0) {
kfree(user_data);
return result;
}
result = __parse_endpoint_param_for_gpio(user_data, endpoint_config_strs, device_data->target_endpoints, device_data->target_endpoint_count);
if (result != 0) {
kfree(user_data);
return result;
}
device_data->data = (void *)user_data;
return 0;
}
static void start_input_device_for_gpio(input_device_data_t *device_data)
{
int i, j;
int pull_ups[32], pull_idx;
device_gpio_index_table_t* table;
device_gpio_data_t* user_data = (device_gpio_data_t *)device_data->data;
if (user_data == NULL) return;
table = user_data->button_cfgs;
pull_idx = 0;
for (i = 0; i < device_data->target_endpoint_count; i++) {
device_gpio_index_item_t* item = (device_gpio_index_item_t*)table->buttondef;
for (j = 0; j < table->pin_count; j++) {
if (item->gpio != -1) {
gpio_as_input(item->gpio);
pull_ups[pull_idx++] = item->gpio;
}
item++;
}
table++;
}
gpio_pullups(pull_ups, pull_idx);
device_data->is_opend = TRUE;
}
static void check_input_device_for_gpio(input_device_data_t* device_data)
{
int i, j;
device_gpio_index_table_t* table;
device_gpio_data_t* user_data = (device_gpio_data_t *)device_data->data;
if (user_data == NULL) return;
table = user_data->button_cfgs;
for (i = 0; i < device_data->target_endpoint_count; i++) {
input_endpoint_data_t* endpoint = device_data->target_endpoints[i];
device_gpio_index_item_t* item = &table->buttondef[table->button_start_index];
for (j = 0; j < table->pin_count; j++) {
if (item->gpio >= 0 && item->button >= 0) { // to avoid unused buttons
if (gpio_get_value(item->gpio) == 0) {
endpoint->report_button_state[item->button] = item->value;
}
}
item++;
}
table++;
}
}
static void stop_input_device_for_gpio(input_device_data_t *device_data)
{
device_data->is_opend = FALSE;
}
int register_input_device_for_gpio(input_device_type_desc_t *device_desc)
{
strcpy(device_desc->device_type, "gpio");
device_desc->init_input_dev = init_input_device_for_gpio;
device_desc->start_input_dev = start_input_device_for_gpio;
device_desc->check_input_dev = check_input_device_for_gpio;
device_desc->stop_input_dev = stop_input_device_for_gpio;
return 0;
}