hekate/nyx/nyx_gui/input/touch.c

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/*
* Touch driver for Nintendo Switch's STM FingerTip S (4cd60d) touch controller
*
* Copyright (c) 2018 langerhans
* Copyright (c) 2018-2020 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/btn.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, u8 *buf, u8 size)
{
int res = i2c_send_buf_small(I2C_3, STMFTS_I2C_ADDR, cmd, buf, size);
if (!res)
return 1;
return 0;
}
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static int touch_read_reg(u8 *cmd, u32 csize, u8 *buf, u32 size)
{
int res = i2c_send_buf_small(I2C_3, STMFTS_I2C_ADDR, cmd[0], &cmd[1], csize - 1);
if (res)
res = i2c_recv_buf(buf, size, I2C_3, STMFTS_I2C_ADDR);
if (!res)
return 1;
return 0;
}
static int touch_wait_event(u8 event, u8 status, u32 timeout)
{
u32 timer = get_tmr_ms() + timeout;
while (true)
{
u8 tmp[8] = {0};
i2c_recv_buf_small(tmp, 8, I2C_3, STMFTS_I2C_ADDR, STMFTS_READ_ONE_EVENT);
if (tmp[1] == event && tmp[2] == status)
return 0;
if (get_tmr_ms() > timer)
return 1;
}
}
#define X_REAL_MAX 1264
#define Y_REAL_MAX 704
#define EDGE_OFFSET 15
static void _touch_compensate_limits(touch_event *event, bool touching)
{
event->x = MAX(event->x, EDGE_OFFSET);
event->x = MIN(event->x, X_REAL_MAX);
event->x -= EDGE_OFFSET;
u32 x_adj = (1280 * 1000) / (X_REAL_MAX - EDGE_OFFSET);
event->x = ((u32)event->x * x_adj) / 1000;
if (touching)
{
event->y = MAX(event->y, EDGE_OFFSET);
event->y = MIN(event->y, Y_REAL_MAX);
event->y -= EDGE_OFFSET;
u32 y_adj = (720 * 1000) / (Y_REAL_MAX - EDGE_OFFSET);
event->y = ((u32)event->y * y_adj) / 1000;
}
}
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->raw[6] << 8);
event->z = event->z << 6;
u16 tmp = 0x40;
if ((event->raw[7] & 0x3F) != 1 && (event->raw[7] & 0x3F) != 0x3F)
tmp = event->raw[7] & 0x3F;
event->z /= tmp + 0x40;
event->fingers = ((event->raw[1] & STMFTS_MASK_TOUCH_ID) >> 4) + 1;
}
else
event->fingers = 0;
_touch_compensate_limits(event, touching);
}
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 < 255) // Reject palm rest.
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;
}
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int touch_get_fw_info(touch_fw_info_t *fw)
{
u8 buf[8] = {0};
// Get fw address info.
u8 cmd[3] = { STMFTS_RW_FRAMEBUFFER_REG, 0, 0x60 };
int res = touch_read_reg(cmd, 3, buf, 3);
if (!res)
{
// Get fw info.
cmd[1] = buf[2]; cmd[2] = buf[1];
res = touch_read_reg(cmd, 3, buf, 8);
if (!res)
{
fw->fw_id = (buf[1] << 24) | (buf[2] << 16) | (buf[3] << 8) | buf[4];
fw->ftb_ver = (buf[6] << 8) | buf[5];
}
cmd[2]++;
res = touch_read_reg(cmd, 3, buf, 8);
if (!res)
fw->fw_rev = (buf[7] << 8) | buf[6];
}
return res;
}
int touch_sys_reset()
{
u8 cmd[3] = { 0, 0x28, 0x80 }; // System reset cmd.
for (u8 retries = 0; retries < 3; retries++)
{
if (touch_command(STMFTS_WRITE_REG, cmd, 3))
{
msleep(10);
continue;
}
msleep(10);
if (touch_wait_event(STMFTS_EV_CONTROLLER_READY, 0, 20))
continue;
else
return 0;
}
return 1;
}
int touch_execute_autotune()
{
// Reset touchscreen module.
if (touch_sys_reset())
return 0;
// Trim low power oscillator.
touch_command(STMFTS_LP_TIMER_CALIB, NULL, 0);
msleep(200);
// Apply Mutual Sense Compensation tuning.
if (touch_command(STMFTS_MS_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 1, 2000))
return 0;
// Apply Self Sense Compensation tuning.
if (touch_command(STMFTS_SS_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 2, 2000))
return 0;
// Save Compensation data to EEPROM.
if (touch_command(STMFTS_SAVE_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 4, 2000))
return 0;
// Enable auto tuning calibration and multi-touch sensing.
u8 cmd = 1;
if (touch_command(STMFTS_AUTO_CALIBRATION, &cmd, 1))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON, NULL, 0))
return 0;
if (touch_command(STMFTS_CLEAR_EVENT_STACK, NULL, 0))
return 0;
return 1;
}
static int touch_init()
{
// Initialize touchscreen module.
if (touch_sys_reset())
return 0;
// Enable auto tuning calibration and multi-touch sensing.
u8 cmd = 1;
if (touch_command(STMFTS_AUTO_CALIBRATION, &cmd, 1))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON, NULL, 0))
return 0;
if (touch_command(STMFTS_CLEAR_EVENT_STACK, NULL, 0))
return 0;
return 1;
}
int touch_power_on()
{
// 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));
// Configure touchscreen GPIO.
PINMUX_AUX(PINMUX_AUX_DAP4_SCLK) = PINMUX_PULL_DOWN | 1;
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_LPDR | PINMUX_INPUT_ENABLE | PINMUX_TRISTATE | PINMUX_PULL_UP | 2;
PINMUX_AUX(PINMUX_AUX_CAM_I2C_SCL) = PINMUX_IO_HV | PINMUX_LPDR | PINMUX_TRISTATE | PINMUX_PULL_DOWN | 2;
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);
// Wait for the touchscreen module to get ready.
touch_wait_event(STMFTS_EV_CONTROLLER_READY, 0, 20);
u32 btn = btn_wait_timeout(0, BTN_VOL_DOWN | BTN_VOL_UP);
if ((btn & BTN_VOL_DOWN) && (btn & BTN_VOL_UP))
return touch_execute_autotune();
else
return touch_init();
}
void touch_power_off()
{
// 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);
}