hekate/nyx/nyx_gui/input/touch.c

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/*
* Touch driver for Nintendo Switch's STMicroelectronics FingerTip touch controller
*
* Copyright (c) 2018 langerhans
* Copyright (c) 2018 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "../soc/clock.h"
#include "../soc/i2c.h"
#include "../soc/pinmux.h"
#include "../power/max7762x.h"
#include "../power/max77620.h"
#include "../soc/gpio.h"
#include "../soc/t210.h"
#include "../utils/util.h"
#include "touch.h"
#include "../gfx/gfx.h"
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#define DPRINTF(...) gfx_printf(__VA_ARGS__)
static int touch_command(u8 cmd)
{
int err = i2c_send_byte(I2C_3, STMFTS_I2C_ADDR, cmd, 0);
if (!err)
return 1;
// TODO: Check for completion in event loop
msleep(1);
return 0;
}
static void _touch_process_contact_event(touch_event *event, bool touching)
{
event->x = (event->raw[2] << 4) | ((event->raw[4] & STMFTS_MASK_Y_LSB) >> 4);
// Normally, GUI elements have bigger horizontal estate.
// Avoid parsing y axis when finger is removed to minimize touch noise.
if (touching)
{
event->y = (event->raw[3] << 4) | (event->raw[4] & STMFTS_MASK_X_MSB);
event->z = event->raw[5];
event->fingers = ((event->raw[1] & STMFTS_MASK_TOUCH_ID) >> 4) + 1;
}
else
event->fingers = 0;
}
static void _touch_parse_event(touch_event *event)
{
event->type = event->raw[1] & STMFTS_MASK_EVENT_ID;
switch (event->type)
{
case STMFTS_EV_MULTI_TOUCH_ENTER:
case STMFTS_EV_MULTI_TOUCH_MOTION:
_touch_process_contact_event(event, true);
if (event->z > 52) // Discard noisy hover touch.
event->touch = true;
else
{
event->touch = false;
event->type = STMFTS_EV_MULTI_TOUCH_LEAVE;
}
break;
case STMFTS_EV_MULTI_TOUCH_LEAVE:
event->touch = false;
_touch_process_contact_event(event, false);
break;
case STMFTS_EV_NO_EVENT:
if (event->touch)
event->type = STMFTS_EV_MULTI_TOUCH_MOTION;
break;
default:
if (event->touch && event->raw[0] == STMFTS_EV_MULTI_TOUCH_MOTION)
event->type = STMFTS_EV_MULTI_TOUCH_MOTION;
else
event->type = STMFTS_EV_MULTI_TOUCH_LEAVE;
}
// gfx_con_setpos(&gfx_con, 0, 300);
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// DPRINTF("x = %d \ny = %d \nz = %d \n", event->x, event->y, event->z);
// DPRINTF("0 = %02X\n1 = %02x\n2 = %02x\n3 = %02x\n", event->raw[0], event->raw[1], event->raw[2], event->raw[3]);
// DPRINTF("4 = %02X\n5 = %02x\n6 = %02x\n7 = %02x\n", event->raw[4], event->raw[5], event->raw[6], event->raw[7]);
}
void touch_poll(touch_event *event)
{
i2c_recv_buf_small(event->raw, 8, I2C_3, STMFTS_I2C_ADDR, STMFTS_LATEST_EVENT);
_touch_parse_event(event);
}
touch_event touch_poll_wait()
{
touch_event event;
do
{
touch_poll(&event);
} while (event.type != STMFTS_EV_MULTI_TOUCH_LEAVE);
return event;
}
touch_info touch_get_info()
{
touch_info info;
u8 buf[8];
memset(&buf, 0, 8);
i2c_recv_buf_small(buf, 8, I2C_3, STMFTS_I2C_ADDR, STMFTS_READ_INFO);
info.chip_id = buf[0] << 8 | buf[1];
info.fw_ver = buf[2] << 8 | buf[3];
info.config_id = buf[4];
info.config_ver = buf[5];
//DPRINTF("ID: %04X, FW Ver: %d.%02d\nCfg ID: %02x, Cfg Ver: %d\n",
// info.chip_id, info.fw_ver >> 8, info.fw_ver & 0xFF, info.config_id, info.config_ver);
return info;
}
int touch_power_on()
{
// Configure touchscreen GPIO.
PINMUX_AUX(PINMUX_AUX_DAP4_SCLK) = PINMUX_PULL_DOWN | 3;
gpio_config(GPIO_PORT_J, GPIO_PIN_7, GPIO_MODE_GPIO);
gpio_output_enable(GPIO_PORT_J, GPIO_PIN_7, GPIO_OUTPUT_ENABLE);
gpio_write(GPIO_PORT_J, GPIO_PIN_7, GPIO_HIGH);
// IRQ and more.
// PINMUX_AUX(PINMUX_AUX_TOUCH_INT) = PINMUX_INPUT_ENABLE | PINMUX_TRISTATE | PINMUX_PULL_UP | 3;
// gpio_config(GPIO_PORT_X, GPIO_PIN_1, GPIO_MODE_GPIO);
// gpio_write(GPIO_PORT_X, GPIO_PIN_1, GPIO_LOW);
// Configure Touscreen and GCAsic shared GPIO.
PINMUX_AUX(PINMUX_AUX_CAM_I2C_SDA) = PINMUX_TRISTATE | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP | 3;
PINMUX_AUX(PINMUX_AUX_CAM_I2C_SCL) = PINMUX_INPUT_ENABLE | 1;
gpio_config(GPIO_PORT_S, GPIO_PIN_3, GPIO_MODE_GPIO);
// Initialize I2C3.
pinmux_config_i2c(I2C_3);
clock_enable_i2c(I2C_3);
i2c_init(I2C_3);
// Enables LDO6 for touchscreen VDD/AVDD supply
max77620_regulator_set_volt_and_flags(REGULATOR_LDO6, 2900000, MAX77620_POWER_MODE_NORMAL);
i2c_send_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_LDO6_CFG2,
MAX77620_LDO_CFG2_ADE_ENABLE | (3 << 3) | (MAX77620_POWER_MODE_NORMAL << MAX77620_LDO_POWER_MODE_SHIFT));
msleep(20);
// Initialize touchscreen module.
if (touch_command(STMFTS_SYSTEM_RESET))
return 0;
if (touch_command(STMFTS_SLEEP_OUT))
return 0;
if (touch_command(STMFTS_MS_CX_TUNING))
return 0;
if (touch_command(STMFTS_SS_CX_TUNING))
return 0;
if (touch_command(STMFTS_FULL_FORCE_CALIBRATION))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON))
return 0;
if (touch_command(STMFTS_SS_HOVER_SENSE_OFF))
return 0;
return 1;
}
void touch_power_off()
{
touch_command(STMFTS_SLEEP_IN);
// Disable touchscreen power.
gpio_write(GPIO_PORT_J, GPIO_PIN_7, GPIO_LOW);
// Disables LDO6 for touchscreen VDD, AVDD supply
max77620_regulator_enable(REGULATOR_LDO6, 0);
i2c_send_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_LDO6_CFG2,
MAX77620_LDO_CFG2_ADE_ENABLE | (2 << 3) | (MAX77620_POWER_MODE_NORMAL << MAX77620_LDO_POWER_MODE_SHIFT));
clock_disable_i2c(I2C_3);
}