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Fix issue with ppkb inputd not working after using the kernel driver

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This was caused by kernel driver disabling the matrix scan in the KB
firmware and userspace tools not re-enabling it on startup. :)
This commit is contained in:
Ondrej Jirman 2022-07-27 23:02:15 +02:00
parent ec8e248883
commit 693cf5ae86
1 changed files with 35 additions and 4 deletions
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39
i2c-inputd.c
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@ -61,11 +61,35 @@ int read_kb(int fd, uint8_t data[16])
return ret == 2 ? 0 : -1;
}
int write_kb(int fd, uint8_t* data)
int read_kb_reg(int fd, uint8_t reg, uint8_t* data)
{
int ret;
struct i2c_msg msgs[] = {
{ KB_ADDR, 0, 4, data },
{ 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 = {
@ -318,8 +342,15 @@ int main(int ac, char* av[])
debug("\033[2J");
// uint8_t buf[4] = {1, 2, 3, 4};
// ret = write_kb(fd, buf);
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