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/*
* Pinephone keyboard userspace input device daemon.
*
* Copyright (C) 2021 Ondřej Jirman <megi@xff.cz>
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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/>.
*/
// {{{ includes
#include "common.c"
#include "firmware/registers.h"
#include <linux/input.h>
#include <linux/uinput.h>
int read_kb(int fd, uint8_t data[16])
{
int ret;
uint8_t b = REG_KEYMATRIX_STATE_CRC8;
struct i2c_msg msgs[] = {
{ KB_ADDR, 0, 1, &b },
{ KB_ADDR, I2C_M_RD, REG_KEYMATRIX_STATE_END - REG_KEYMATRIX_STATE_CRC8 + 1, data },
};
struct i2c_rdwr_ioctl_data msg = {
.msgs = msgs,
.nmsgs = sizeof(msgs) / sizeof(msgs[0])
};
ret = ioctl(fd, I2C_RDWR, &msg);
if (ret < 0) {
printf("WARNING: I2C_RDWR failed (%d)\n", errno);
return -1;
}
uint8_t crc = crc8(data + 1, REG_KEYMATRIX_STATE_END - REG_KEYMATRIX_STATE_CRC8);
if (crc != data[0]) {
printf("WARNING: Key data CRC8 mismatch: ");
for (int i = 0; i < REG_KEYMATRIX_STATE_END - REG_KEYMATRIX_STATE_CRC8 + 1; i++)
printf("%02hhx", data[i]);
printf("\n");
return -2;
}
return ret == 2 ? 0 : -1;
}
int read_kb_reg(int fd, uint8_t reg, uint8_t* data)
{
int ret;
struct i2c_msg msgs[] = {
{ KB_ADDR, 0, 1, &reg },
{ KB_ADDR, I2C_M_RD, 1, data },
};
struct i2c_rdwr_ioctl_data msg = {
.msgs = msgs,
.nmsgs = sizeof(msgs) / sizeof(msgs[0])
};
ret = ioctl(fd, I2C_RDWR, &msg);
if (ret < 0) {
printf("WARNING: I2C_RDWR failed (%d)\n", errno);
return -1;
}
return ret == 2 ? 0 : -1;
}
int write_kb_reg(int fd, uint8_t reg, uint8_t data)
{
int ret;
uint8_t buf[2] = {reg, data};
struct i2c_msg msgs[] = {
{ KB_ADDR, 0, 2, buf },
};
struct i2c_rdwr_ioctl_data msg = {
.msgs = msgs,
.nmsgs = sizeof(msgs) / sizeof(msgs[0])
};
ret = ioctl(fd, I2C_RDWR, &msg);
syscall_error(ret < 0, "I2C_RDWR failed");
return ret == 1 ? 0 : -1;
}
#include "kmap.h"
int open_uinput_dev(void)
{
int fd, ret;
fd = open("/dev/uinput", O_WRONLY/* | O_NONBLOCK*/);
syscall_error(fd < 0, "open(/dev/uinput) failed");
struct uinput_setup setup = {
.name = "ppkbd",
.id = {
.bustype = BUS_USB,
.vendor = 0x1234,
.product = 0x5678,
},
};
ret = ioctl(fd, UI_SET_EVBIT, EV_KEY);
syscall_error(ret < 0, "UI_SET_EVBIT failed");
for (int i = 0; i < sizeof(used_keys) / sizeof(used_keys[0]); i++) {
ret = ioctl(fd, UI_SET_KEYBIT, used_keys[i]);
syscall_error(ret < 0, "UI_SET_KEYBIT failed");
}
ret = ioctl(fd, UI_DEV_SETUP, &setup);
syscall_error(ret < 0, "UI_DEV_SETUP failed");
ret = ioctl(fd, UI_DEV_CREATE);
syscall_error(ret < 0, "UI_DEV_CREATE failed");
//ioctl(fd, UI_DEV_DESTROY);
//close(fd);
return fd;
}
void emit_ev(int fd, int type, int code, int val)
{
struct input_event ev = {
.type = type,
.code = code,
.value = val,
};
ssize_t ret = write(fd, &ev, sizeof ev);
syscall_error(ret < 0, "write event failed");
}
void print_bitmap(uint8_t* map)
{
// printf("\033[H");
for (int r = 0; r < 6; r++) {
if (r == 0) {
printf(" C");
for (int c = 0; c < 12; c++)
printf("%-3d", c + 1);
printf("\n");
}
printf("R%d", r + 1);
for (int c = 0; c < 12; c++)
printf(" %s", map[c] & (1u << r) ? "X" : ".");
printf("\n");
}
}
int get_index(int* keys, int len, int key)
{
for (int i = 0; i < len; i++) {
if (keys[i] == key)
return i;
}
return -1;
}
int compact(int* keys, int len)
{
int ckeys[len];
int ci = 0;
memset(ckeys, 0, len * sizeof(int));
for (int i = 0; i < len; i++)
if (keys[i])
ckeys[ci++] = keys[i];
memcpy(keys, ckeys, sizeof ckeys);
return ci;
}
static int uinput_fd = -1;
static int pressed_keys[128]; // contains currently pressed phys_idxs in press order
static int pressed_count;
static int fn_mode = 0;
static int pine_mode = 0;
void on_press(uint8_t phys_idx)
{
int key = keymap_base[phys_idx][0];
printf("press %02hhx %s\n", phys_idx, key ? key_names[key] : "");
if (key == KEY_FN || key == KEY_LEFTMETA) {
return;
}
//XXX: make sure fn/pine is the last presssed key prior to this one?
int fn_idx = get_index(pressed_keys, pressed_count, 0x52);
int pine_idx = get_index(pressed_keys, pressed_count, 0x31);
if (key == KEY_ESC && (fn_mode || pine_mode)) {
fn_mode = pine_mode = 0;
return;
}
const int* keys = keymap_base[phys_idx];
if (fn_idx >= 0 || fn_mode) {
if (key == KEY_ESC) {
fn_mode = 1;
return;
}
keys = keymap_fn[phys_idx];
} else if (pine_idx >= 0 || pine_mode) {
if (key == KEY_ESC) {
pine_mode = 1;
return;
}
keys = keymap_pine[phys_idx];
}
if (!keys[0])
keys = keymap_base[phys_idx];
if (keys[0]) {
emit_ev(uinput_fd, EV_KEY, keys[0], 1);
emit_ev(uinput_fd, EV_SYN, SYN_REPORT, 0);
}
if (keys[1]) {
emit_ev(uinput_fd, EV_KEY, keys[1], 1);
emit_ev(uinput_fd, EV_SYN, SYN_REPORT, 0);
}
}
void on_release(uint8_t phys_idx)
{
int key = keymap_base[phys_idx][0];
printf("release %02hhx %s\n", phys_idx, key ? key_names[key] : "");
if (key == KEY_FN || key == KEY_LEFTMETA) {
return;
}
int fn_idx = get_index(pressed_keys, pressed_count, 0x52);
int pine_idx = get_index(pressed_keys, pressed_count, 0x31);
const int* keys = keymap_base[phys_idx];
if (fn_idx >= 0 || fn_mode) {
keys = keymap_fn[phys_idx];
} else if (pine_idx >= 0 || pine_mode) {
keys = keymap_pine[phys_idx];
}
if (!keys[0])
keys = keymap_base[phys_idx];
if (keys[0]) {
emit_ev(uinput_fd, EV_KEY, keys[0], 0);
emit_ev(uinput_fd, EV_SYN, SYN_REPORT, 0);
}
if (keys[1]) {
emit_ev(uinput_fd, EV_KEY, keys[1], 0);
emit_ev(uinput_fd, EV_SYN, SYN_REPORT, 0);
}
}
void update_keys(uint8_t* map)
{
// physical indices of pressed keys reported over I2C
int keys[128];
int n_keys = 0;
for (int c = 0; c < 12; c++) {
for (int r = 0; r < 6; r++) {
if (map[c] != 0xff && map[c] & (1u << r)) {
uint8_t el_idx = (r << 4) | c;
uint8_t phys_idx = el_phys_map[el_idx];
if (phys_idx != 0xff && n_keys < 128)
keys[n_keys++] = phys_idx;
}
}
}
// which pressed keys are no longer pressed?
for (int j = 0; j < pressed_count; j++) {
int key = pressed_keys[j];
int idx = get_index(keys, n_keys, key);
if (idx < 0) {
pressed_keys[j] = 0;
pressed_count = compact(pressed_keys, 128);
on_release(key);
}
}
// which new keys are pressed?
for (int i = 0; i < n_keys; i++) {
int key = keys[i];
// if the key was not pressed, handle a new press event
int pressed_idx = get_index(pressed_keys, pressed_count, key);
if (pressed_idx < 0 && pressed_count < 128) {
pressed_keys[pressed_count++] = key;
on_press(key);
}
}
}
int main(int ac, char* av[])
{
int fd, ret;
fd = pogo_i2c_open();
uinput_fd = open_uinput_dev();
int lfd = gpio_setup_pogo_int(GPIO_V2_LINE_FLAG_INPUT | GPIO_V2_LINE_FLAG_BIAS_PULL_UP | /*GPIO_V2_LINE_FLAG_ACTIVE_HIGH |*/ GPIO_V2_LINE_FLAG_EDGE_FALLING);
struct pollfd fds[2] = {
{ .fd = lfd, .events = POLLIN, },
};
debug("\033[2J");
uint8_t val;
ret = read_kb_reg(fd, REG_SYS_CONFIG, &val);
syscall_error(ret < 0, "read_kb_reg(PPKB_SYS_CONFIG) failed");
val &= ~REG_SYS_CONFIG_SCAN_BLOCK;
ret = write_kb_reg(fd, REG_SYS_CONFIG, val);
syscall_error(ret < 0, "write_kb_reg(PPKB_SYS_CONFIG) failed");
// - we rely on POGO interrupt to get the key updates
// - if any key is pressed, we will in addition poll
// for the current key status every 200ms of no interrupt
// activity
while (1) {
ret = poll(fds, 1, pressed_count > 0 ? 200 : 10000);
syscall_error(ret < 0, "poll failed");
bool is_poll = false;
if (fds[0].revents & POLLIN) {
struct gpio_v2_line_event ev;
ssize_t len = read(lfd, &ev, sizeof ev);
syscall_error(len != sizeof ev, "Invalid event size");
printf("%"PRIu64": Interrupt received\n", time_abs());
} else if (ret == 0 && pressed_count > 0) {
printf("%"PRIu64": Poll\n", time_abs());
is_poll = true;
} else {
continue;
}
// read keyboard data
int retries_left = 3;
uint8_t buf[16];
while (retries_left--) {
ret = read_kb(fd, buf);
if (ret)
continue;
}
if (retries_left == 0 && ret) {
printf("%"PRIu64": WARNING: Failed to read keyboard data after 3 retries\n", time_abs());
}
if (ret == 0) {
if (is_poll && pressed_count == 0) {
printf("%"PRIu64": WARNING: Missed interrupt for key release\n", time_abs());
}
print_bitmap(buf + 1);
update_keys(buf + 1);
}
}
return 0;
}