static int m920x_rc_core_query(struct dvb_usb_device *d)
{
int ret = 0;
u8 *rc_state;
int state;
rc_state = kmalloc(2, GFP_KERNEL);
if (!rc_state)
return -ENOMEM;
if ((ret = m920x_read(d->udev, M9206_CORE, 0x0, M9206_RC_STATE, &rc_state[0], 1)) != 0)
goto out;
if ((ret = m920x_read(d->udev, M9206_CORE, 0x0, M9206_RC_KEY, &rc_state[1], 1)) != 0)
goto out;
deb("state=0x%02x keycode=0x%02x\n", rc_state[0], rc_state[1]);
m920x_parse_rc_state(d, rc_state[0], &state);
if (state == REMOTE_NO_KEY_PRESSED)
rc_keyup(d->rc_dev);
else if (state == REMOTE_KEY_REPEAT)
rc_repeat(d->rc_dev);
else
rc_keydown(d->rc_dev, RC_PROTO_UNKNOWN, rc_state[1], 0);
out:
kfree(rc_state);
return ret;
}
static ssize_t user_rc_input_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
int ret;
struct user_rc_input_dev *input_dev = file->private_data;
__u8 *buf;
buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
if (!buf) {
dev_err(input_dev->dev,
"kmalloc failed...Insufficient memory\n");
ret = -ENOMEM;
goto out;
}
if (copy_from_user(buf, buffer, count)) {
dev_err(input_dev->dev, "Copy from user failed\n");
ret = -EFAULT;
goto out_free;
}
switch (buf[0]) {
case USER_CONTROL_PRESSED:
dev_dbg(input_dev->dev, "user controlled"
" pressed 0x%x\n", buf[1]);
rc_keydown(input_dev->rcdev, buf[1], 0);
break;
case USER_CONTROL_REPEATED:
dev_dbg(input_dev->dev, "user controlled"
" repeated 0x%x\n", buf[1]);
rc_repeat(input_dev->rcdev);
break;
case USER_CONTROL_RELEASED:
dev_dbg(input_dev->dev, "user controlled"
" released 0x%x\n", buf[1]);
rc_keyup(input_dev->rcdev);
break;
}
out_free:
kfree(buf);
out:
return ret;
}
/**
* ir_sanyo_decode() - Decode one SANYO pulse or space
* @dev: the struct rc_dev descriptor of the device
* @duration: the struct ir_raw_event descriptor of the pulse/space
*
* This function returns -EINVAL if the pulse violates the state machine
*/
static int ir_sanyo_decode(struct rc_dev *dev, struct ir_raw_event ev)
{
struct sanyo_dec *data = &dev->raw->sanyo;
u32 scancode;
u8 address, command, not_command;
if (!(dev->raw->enabled_protocols & RC_BIT_SANYO))
return 0;
if (!is_timing_event(ev)) {
if (ev.reset) {
IR_dprintk(1, "SANYO event reset received. reset to state 0\n");
data->state = STATE_INACTIVE;
}
return 0;
}
IR_dprintk(2, "SANYO decode started at state %d (%uus %s)\n",
data->state, TO_US(ev.duration), TO_STR(ev.pulse));
switch (data->state) {
case STATE_INACTIVE:
if (!ev.pulse)
break;
if (eq_margin(ev.duration, SANYO_HEADER_PULSE, SANYO_UNIT / 2)) {
data->count = 0;
data->state = STATE_HEADER_SPACE;
return 0;
}
break;
case STATE_HEADER_SPACE:
if (ev.pulse)
break;
if (eq_margin(ev.duration, SANYO_HEADER_SPACE, SANYO_UNIT / 2)) {
data->state = STATE_BIT_PULSE;
return 0;
}
break;
case STATE_BIT_PULSE:
if (!ev.pulse)
break;
if (!eq_margin(ev.duration, SANYO_BIT_PULSE, SANYO_UNIT / 2))
break;
data->state = STATE_BIT_SPACE;
return 0;
case STATE_BIT_SPACE:
if (ev.pulse)
break;
if (!data->count && geq_margin(ev.duration, SANYO_REPEAT_SPACE, SANYO_UNIT / 2)) {
if (!dev->keypressed) {
IR_dprintk(1, "SANYO discarding last key repeat: event after key up\n");
} else {
rc_repeat(dev);
IR_dprintk(1, "SANYO repeat last key\n");
data->state = STATE_INACTIVE;
}
return 0;
}
data->bits <<= 1;
if (eq_margin(ev.duration, SANYO_BIT_1_SPACE, SANYO_UNIT / 2))
data->bits |= 1;
else if (!eq_margin(ev.duration, SANYO_BIT_0_SPACE, SANYO_UNIT / 2))
break;
data->count++;
if (data->count == SANYO_NBITS)
data->state = STATE_TRAILER_PULSE;
else
data->state = STATE_BIT_PULSE;
return 0;
case STATE_TRAILER_PULSE:
if (!ev.pulse)
break;
if (!eq_margin(ev.duration, SANYO_TRAILER_PULSE, SANYO_UNIT / 2))
break;
data->state = STATE_TRAILER_SPACE;
return 0;
case STATE_TRAILER_SPACE:
if (ev.pulse)
break;
if (!geq_margin(ev.duration, SANYO_TRAILER_SPACE, SANYO_UNIT / 2))
break;
address = bitrev16((data->bits >> 29) & 0x1fff) >> 3;
/* not_address = bitrev16((data->bits >> 16) & 0x1fff) >> 3; */
command = bitrev8((data->bits >> 8) & 0xff);
not_command = bitrev8((data->bits >> 0) & 0xff);
if ((command ^ not_command) != 0xff) {
IR_dprintk(1, "SANYO checksum error: received 0x%08Lx\n",
data->bits);
data->state = STATE_INACTIVE;
return 0;
}
scancode = address << 8 | command;
IR_dprintk(1, "SANYO scancode: 0x%06x\n", scancode);
rc_keydown(dev, scancode, 0);
data->state = STATE_INACTIVE;
return 0;
}
IR_dprintk(1, "SANYO decode failed at count %d state %d (%uus %s)\n",
data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
static int af9015_rc_query(struct dvb_usb_device *d)
{
struct af9015_state *state = d_to_priv(d);
int ret;
u8 buf[17];
/* read registers needed to detect remote controller code */
ret = af9015_read_regs(d, 0x98d9, buf, sizeof(buf));
if (ret)
goto error;
/* If any of these are non-zero, assume invalid data */
if (buf[1] || buf[2] || buf[3]) {
dev_dbg(&d->udev->dev, "%s: invalid data\n", __func__);
return ret;
}
/* Check for repeat of previous code */
if ((state->rc_repeat != buf[6] || buf[0]) &&
!memcmp(&buf[12], state->rc_last, 4)) {
dev_dbg(&d->udev->dev, "%s: key repeated\n", __func__);
rc_repeat(d->rc_dev);
state->rc_repeat = buf[6];
return ret;
}
/* Only process key if canary killed */
if (buf[16] != 0xff && buf[0] != 0x01) {
dev_dbg(&d->udev->dev, "%s: key pressed %*ph\n",
__func__, 4, buf + 12);
/* Reset the canary */
ret = af9015_write_reg(d, 0x98e9, 0xff);
if (ret)
goto error;
/* Remember this key */
memcpy(state->rc_last, &buf[12], 4);
if (buf[14] == (u8) ~buf[15]) {
if (buf[12] == (u8) ~buf[13]) {
/* NEC */
state->rc_keycode = RC_SCANCODE_NEC(buf[12],
buf[14]);
} else {
/* NEC extended*/
state->rc_keycode = RC_SCANCODE_NECX(buf[12] << 8 |
buf[13],
buf[14]);
}
} else {
/* 32 bit NEC */
state->rc_keycode = RC_SCANCODE_NEC32(buf[12] << 24 |
buf[13] << 16 |
buf[14] << 8 |
buf[15]);
}
rc_keydown(d->rc_dev, RC_TYPE_NEC, state->rc_keycode, 0);
} else {
dev_dbg(&d->udev->dev, "%s: no key press\n", __func__);
/* Invalidate last keypress */
/* Not really needed, but helps with debug */
state->rc_last[2] = state->rc_last[3];
}
state->rc_repeat = buf[6];
state->rc_failed = false;
error:
if (ret) {
dev_warn(&d->udev->dev, "%s: rc query failed=%d\n",
KBUILD_MODNAME, ret);
/* allow random errors as dvb-usb will stop polling on error */
if (!state->rc_failed)
ret = 0;
state->rc_failed = true;
}
return ret;
}
/**
* ir_nec_decode() - Decode one NEC pulse or space
* @dev: the struct rc_dev descriptor of the device
* @duration: the struct ir_raw_event descriptor of the pulse/space
*
* This function returns -EINVAL if the pulse violates the state machine
*/
static int ir_nec_decode(struct rc_dev *dev, struct ir_raw_event ev)
{
struct nec_dec *data = &dev->raw->nec;
u32 scancode;
u8 address, not_address, command, not_command;
bool send_32bits = false;
if (!(dev->raw->enabled_protocols & RC_TYPE_NEC))
return 0;
if (!is_timing_event(ev)) {
if (ev.reset)
data->state = STATE_INACTIVE;
return 0;
}
IR_dprintk(2, "NEC decode started at state %d (%uus %s)\n",
data->state, TO_US(ev.duration), TO_STR(ev.pulse));
switch (data->state) {
case STATE_INACTIVE:
if (!ev.pulse)
break;
if (eq_margin(ev.duration, NEC_HEADER_PULSE, NEC_UNIT / 2)) {
data->is_nec_x = false;
data->necx_repeat = false;
} else if (eq_margin(ev.duration, NECX_HEADER_PULSE, NEC_UNIT / 2))
data->is_nec_x = true;
else
break;
data->count = 0;
data->state = STATE_HEADER_SPACE;
return 0;
case STATE_HEADER_SPACE:
if (ev.pulse)
break;
if (eq_margin(ev.duration, NEC_HEADER_SPACE, NEC_UNIT / 2)) {
data->state = STATE_BIT_PULSE;
return 0;
} else if (eq_margin(ev.duration, NEC_REPEAT_SPACE, NEC_UNIT / 2)) {
if (!dev->keypressed) {
IR_dprintk(1, "Discarding last key repeat: event after key up\n");
} else {
rc_repeat(dev);
IR_dprintk(1, "Repeat last key\n");
data->state = STATE_TRAILER_PULSE;
}
return 0;
}
break;
case STATE_BIT_PULSE:
if (!ev.pulse)
break;
if (!eq_margin(ev.duration, NEC_BIT_PULSE, NEC_UNIT / 2))
break;
data->state = STATE_BIT_SPACE;
return 0;
case STATE_BIT_SPACE:
if (ev.pulse)
break;
if (data->necx_repeat && data->count == NECX_REPEAT_BITS &&
geq_margin(ev.duration,
NEC_TRAILER_SPACE, NEC_UNIT / 2)) {
IR_dprintk(1, "Repeat last key\n");
rc_repeat(dev);
data->state = STATE_INACTIVE;
return 0;
} else if (data->count > NECX_REPEAT_BITS)
data->necx_repeat = false;
data->bits <<= 1;
if (eq_margin(ev.duration, NEC_BIT_1_SPACE, NEC_UNIT / 2))
data->bits |= 1;
else if (!eq_margin(ev.duration, NEC_BIT_0_SPACE, NEC_UNIT / 2))
break;
data->count++;
if (data->count == NEC_NBITS)
data->state = STATE_TRAILER_PULSE;
else
data->state = STATE_BIT_PULSE;
return 0;
case STATE_TRAILER_PULSE:
if (!ev.pulse)
break;
if (!eq_margin(ev.duration, NEC_TRAILER_PULSE, NEC_UNIT / 2))
break;
data->state = STATE_TRAILER_SPACE;
return 0;
case STATE_TRAILER_SPACE:
if (ev.pulse)
break;
if (!geq_margin(ev.duration, NEC_TRAILER_SPACE, NEC_UNIT / 2))
break;
address = bitrev8((data->bits >> 24) & 0xff);
not_address = bitrev8((data->bits >> 16) & 0xff);
command = bitrev8((data->bits >> 8) & 0xff);
not_command = bitrev8((data->bits >> 0) & 0xff);
if ((command ^ not_command) != 0xff) {
IR_dprintk(1, "NEC checksum error: received 0x%08x\n",
data->bits);
send_32bits = true;
}
if (send_32bits) {
/* NEC transport, but modified protocol, used by at
* least Apple and TiVo remotes */
scancode = data->bits;
IR_dprintk(1, "NEC (modified) scancode 0x%08x\n", scancode);
} else if ((address ^ not_address) != 0xff) {
/* Extended NEC */
scancode = address << 16 |
not_address << 8 |
command;
IR_dprintk(1, "NEC (Ext) scancode 0x%06x\n", scancode);
} else {
/* Normal NEC */
scancode = address << 8 | command;
IR_dprintk(1, "NEC scancode 0x%04x\n", scancode);
}
if (data->is_nec_x)
data->necx_repeat = true;
rc_keydown(dev, scancode, 0);
data->state = STATE_INACTIVE;
return 0;
}
IR_dprintk(1, "NEC decode failed at state %d (%uus %s)\n",
data->state, TO_US(ev.duration), TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
/**
* ir_xmp_decode() - Decode one XMP pulse or space
* @dev: the struct rc_dev descriptor of the device
* @duration: the struct ir_raw_event descriptor of the pulse/space
*
* This function returns -EINVAL if the pulse violates the state machine
*/
static int ir_xmp_decode(struct rc_dev *dev, struct ir_raw_event ev)
{
struct xmp_dec *data = &dev->raw->xmp;
if (!(dev->enabled_protocols & RC_BIT_XMP))
return 0;
if (!is_timing_event(ev)) {
if (ev.reset)
data->state = STATE_INACTIVE;
return 0;
}
IR_dprintk(2, "XMP decode started at state %d %d (%uus %s)\n",
data->state, data->count, TO_US(ev.duration), TO_STR(ev.pulse));
switch (data->state) {
case STATE_INACTIVE:
if (!ev.pulse)
break;
if (eq_margin(ev.duration, XMP_LEADER, XMP_UNIT / 2)) {
data->count = 0;
data->state = STATE_NIBBLE_SPACE;
}
return 0;
case STATE_LEADER_PULSE:
if (!ev.pulse)
break;
if (eq_margin(ev.duration, XMP_LEADER, XMP_UNIT / 2))
data->state = STATE_NIBBLE_SPACE;
return 0;
case STATE_NIBBLE_SPACE:
if (ev.pulse)
break;
if (geq_margin(ev.duration, XMP_TRAILER_SPACE, XMP_NIBBLE_PREFIX)) {
int divider, i;
u8 addr, subaddr, subaddr2, toggle, oem, obc1, obc2, sum1, sum2;
u32 *n;
u32 scancode;
if (data->count != 16) {
IR_dprintk(2, "received TRAILER period at index %d: %u\n",
data->count, ev.duration);
data->state = STATE_INACTIVE;
return -EINVAL;
}
n = data->durations;
/*
* the 4th nibble should be 15 so base the divider on this
* to transform durations into nibbles. Substract 2000 from
* the divider to compensate for fluctuations in the signal
*/
divider = (n[3] - XMP_NIBBLE_PREFIX) / 15 - 2000;
if (divider < 50) {
IR_dprintk(2, "divider to small %d.\n", divider);
data->state = STATE_INACTIVE;
return -EINVAL;
}
/* convert to nibbles and do some sanity checks */
for (i = 0; i < 16; i++)
n[i] = (n[i] - XMP_NIBBLE_PREFIX) / divider;
sum1 = (15 + n[0] + n[1] + n[2] + n[3] +
n[4] + n[5] + n[6] + n[7]) % 16;
sum2 = (15 + n[8] + n[9] + n[10] + n[11] +
n[12] + n[13] + n[14] + n[15]) % 16;
if (sum1 != 15 || sum2 != 15) {
IR_dprintk(2, "checksum errors sum1=0x%X sum2=0x%X\n",
sum1, sum2);
data->state = STATE_INACTIVE;
return -EINVAL;
}
subaddr = n[0] << 4 | n[2];
subaddr2 = n[8] << 4 | n[11];
oem = n[4] << 4 | n[5];
addr = n[6] << 4 | n[7];
toggle = n[10];
obc1 = n[12] << 4 | n[13];
obc2 = n[14] << 4 | n[15];
if (subaddr != subaddr2) {
IR_dprintk(2, "subaddress nibbles mismatch 0x%02X != 0x%02X\n",
subaddr, subaddr2);
data->state = STATE_INACTIVE;
return -EINVAL;
}
if (oem != 0x44)
IR_dprintk(1, "Warning: OEM nibbles 0x%02X. Expected 0x44\n",
oem);
scancode = addr << 24 | subaddr << 16 |
obc1 << 8 | obc2;
IR_dprintk(1, "XMP scancode 0x%06x\n", scancode);
if (toggle == 0) {
rc_keydown(dev, RC_TYPE_XMP, scancode, 0);
} else {
rc_repeat(dev);
IR_dprintk(1, "Repeat last key\n");
}
data->state = STATE_INACTIVE;
return 0;
} else if (geq_margin(ev.duration, XMP_HALFFRAME_SPACE, XMP_NIBBLE_PREFIX)) {
/* Expect 8 or 16 nibble pulses. 16 in case of 'final' frame */
if (data->count == 16) {
IR_dprintk(2, "received half frame pulse at index %d. Probably a final frame key-up event: %u\n",
data->count, ev.duration);
/*
* TODO: for now go back to half frame position
* so trailer can be found and key press
* can be handled.
*/
data->count = 8;
}
else if (data->count != 8)
IR_dprintk(2, "received half frame pulse at index %d: %u\n",
data->count, ev.duration);
data->state = STATE_LEADER_PULSE;
return 0;
} else if (geq_margin(ev.duration, XMP_NIBBLE_PREFIX, XMP_UNIT)) {
/* store nibble raw data, decode after trailer */
if (data->count == 16) {
IR_dprintk(2, "to many pulses (%d) ignoring: %u\n",
data->count, ev.duration);
data->state = STATE_INACTIVE;
return -EINVAL;
}
data->durations[data->count] = ev.duration;
data->count++;
data->state = STATE_LEADER_PULSE;
return 0;
}
break;
}
IR_dprintk(1, "XMP decode failed at count %d state %d (%uus %s)\n",
data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
