/* decode raw bit pattern to RC5 code */
static u32 rc5_decode(unsigned int code)
{
unsigned int org_code = code;
unsigned int pair;
unsigned int rc5 = 0;
int i;
code = (code << 1) | 1;
for (i = 0; i < 14; ++i) {
pair = code & 0x3;
code >>= 2;
rc5 <<= 1;
switch (pair) {
case 0:
case 2:
break;
case 1:
rc5 |= 1;
break;
case 3:
dprintk(KERN_WARNING "bad code: %x\n", org_code);
return 0;
}
}
dprintk(KERN_WARNING "code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
"instr=%x\n", rc5, org_code, RC5_START(rc5),
RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
return rc5;
}
/* decode raw bit pattern to RC5 code */
u32 ir_rc5_decode(unsigned int code)
{
unsigned int org_code = code;
unsigned int pair;
unsigned int rc5 = 0;
int i;
for (i = 0; i < 14; ++i) {
pair = code & 0x3;
code >>= 2;
rc5 <<= 1;
switch (pair) {
case 0:
case 2:
break;
case 1:
rc5 |= 1;
break;
case 3:
dprintk(1, "ir-common: ir_rc5_decode(%x) bad code\n", org_code);
return 0;
}
}
dprintk(1, "ir-common: code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
"instr=%x\n", rc5, org_code, RC5_START(rc5),
RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
return rc5;
}
static void bttv_rc5_timer_end(unsigned long data)
{
struct bttv_ir *ir = (struct bttv_ir *)data;
struct timeval tv;
u32 gap;
u32 rc5 = 0;
/* get time */
do_gettimeofday(&tv);
/* avoid overflow with gap >1s */
if (tv.tv_sec - ir->base_time.tv_sec > 1) {
gap = 200000;
} else {
gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
tv.tv_usec - ir->base_time.tv_usec;
}
/* signal we're ready to start a new code */
ir->active = false;
/* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
if (gap < 28000) {
dprintk(KERN_INFO DEVNAME ": spurious timer_end\n");
return;
}
if (ir->last_bit < 20) {
/* ignore spurious codes (caused by light/other remotes) */
dprintk(KERN_INFO DEVNAME ": short code: %x\n", ir->code);
} else {
ir->code = (ir->code << ir->shift_by) | 1;
rc5 = bttv_rc5_decode(ir->code);
/* two start bits? */
if (RC5_START(rc5) != ir->start) {
printk(KERN_INFO DEVNAME ":"
" rc5 start bits invalid: %u\n", RC5_START(rc5));
/* right address? */
} else if (RC5_ADDR(rc5) == ir->addr) {
u32 toggle = RC5_TOGGLE(rc5);
u32 instr = RC5_INSTR(rc5);
/* Good code */
rc_keydown(ir->dev, instr, toggle);
dprintk(KERN_INFO DEVNAME ":"
" instruction %x, toggle %x\n",
instr, toggle);
}
}
}
static void bttv_rc5_timer_end(unsigned long data)
{
struct bttv_ir *ir = (struct bttv_ir *)data;
ktime_t tv;
u32 gap, rc5, scancode;
u8 toggle, command, system;
/* get time */
tv = ktime_get();
gap = ktime_to_us(ktime_sub(tv, ir->base_time));
/* avoid overflow with gap >1s */
if (gap > USEC_PER_SEC) {
gap = 200000;
}
/* signal we're ready to start a new code */
ir->active = false;
/* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
if (gap < 28000) {
dprintk("spurious timer_end\n");
return;
}
if (ir->last_bit < 20) {
/* ignore spurious codes (caused by light/other remotes) */
dprintk("short code: %x\n", ir->code);
return;
}
ir->code = (ir->code << ir->shift_by) | 1;
rc5 = bttv_rc5_decode(ir->code);
toggle = RC5_TOGGLE(rc5);
system = RC5_ADDR(rc5);
command = RC5_INSTR(rc5);
switch (RC5_START(rc5)) {
case 0x3:
break;
case 0x2:
command += 0x40;
break;
default:
return;
}
scancode = RC_SCANCODE_RC5(system, command);
rc_keydown(ir->dev, RC_TYPE_RC5, scancode, toggle);
dprintk("scancode %x, toggle %x\n", scancode, toggle);
}
static void cx23885_input_process_raw_rc5(struct cx23885_dev *dev)
{
struct card_ir *ir_input = dev->ir_input;
unsigned int code, command;
u32 rc5;
/* Ignore codes that are too short to be valid RC-5 */
if (ir_input->last_bit < (RC5_HALF_BITS - 1))
return;
/* The library has the manchester coding backwards; XOR to adapt. */
code = (ir_input->code & RC5_HALF_BITS_MASK) ^ RC5_HALF_BITS_MASK;
rc5 = ir_rc5_decode(code);
switch (RC5_START(rc5)) {
case RC5_START_BITS_NORMAL:
break;
case RC5_START_BITS_EXTENDED:
/* Don't allow if the remote only emits standard commands */
if (ir_input->start == RC5_START_BITS_NORMAL)
return;
break;
default:
return;
}
if (ir_input->addr != RC5_ADDR(rc5))
return;
/* Don't generate a keypress for RC-5 auto-repeated keypresses */
command = rc5_command(rc5);
if (RC5_TOGGLE(rc5) != RC5_TOGGLE(ir_input->last_rc5) ||
command != rc5_command(ir_input->last_rc5) ||
/* Catch T == 0, CMD == 0 (e.g. '0') as first keypress after init */
RC5_START(ir_input->last_rc5) == 0) {
/* This keypress is differnet: not an auto repeat */
ir_input_nokey(ir_input->dev, &ir_input->ir);
ir_input_keydown(ir_input->dev, &ir_input->ir, command);
}
ir_input->last_rc5 = rc5;
/* Schedule when we should do the key up event: ir_input_nokey() */
mod_timer(&ir_input->timer_keyup,
jiffies + msecs_to_jiffies(ir_input->rc5_key_timeout));
}
static void sms_rc5_parse_word(struct smscore_device_t *coredev)
{
#define RC5_START(x) (((x)>>12)&3)
#define RC5_TOGGLE(x) (((x)>>11)&1)
#define RC5_ADDR(x) (((x)>>6)&0x1F)
#define RC5_INSTR(x) ((x)&0x3F)
int i, j;
u32 rc5_word = 0;
/* Reverse the IR word direction */
for (i = 0 ; i < 28 ; i++)
RC5_PUSH_BIT(rc5_word, (ir_word>>i)&1, j)
rc5_word = ir_rc5_decode(rc5_word);
/* sms_log("temp = 0x%x, rc5_code = 0x%x", ir_word, rc5_word); */
sms_ir_rc5_event(coredev,
RC5_TOGGLE(rc5_word),
RC5_ADDR(rc5_word),
RC5_INSTR(rc5_word));
}
static void bttv_rc5_timer_end(unsigned long data)
{
struct bttv_ir *ir = (struct bttv_ir *)data;
struct timeval tv;
unsigned long current_jiffies, timeout;
u32 gap;
/* get time */
current_jiffies = jiffies;
do_gettimeofday(&tv);
/* avoid overflow with gap >1s */
if (tv.tv_sec - ir->base_time.tv_sec > 1) {
gap = 200000;
} else {
gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
tv.tv_usec - ir->base_time.tv_usec;
}
/* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
if (gap < 28000) {
dprintk(KERN_WARNING "spurious timer_end\n");
return;
}
ir->active = 0;
if (ir->last_bit < 20) {
/* ignore spurious codes (caused by light/other remotes) */
dprintk(KERN_WARNING "short code: %x\n", ir->code);
} else {
u32 rc5 = rc5_decode(ir->code);
/* two start bits? */
if (RC5_START(rc5) != 3) {
dprintk(KERN_WARNING "rc5 start bits invalid: %u\n", RC5_START(rc5));
/* right address? */
} else if (RC5_ADDR(rc5) == 0x0) {
u32 toggle = RC5_TOGGLE(rc5);
u32 instr = RC5_INSTR(rc5);
/* Good code, decide if repeat/repress */
if (toggle != RC5_TOGGLE(ir->last_rc5) ||
instr != RC5_INSTR(ir->last_rc5)) {
dprintk(KERN_WARNING "instruction %x, toggle %x\n", instr,
toggle);
ir_input_nokey(ir->dev, &ir->ir);
ir_input_keydown(ir->dev, &ir->ir, instr,
instr);
}
/* Set/reset key-up timer */
timeout = current_jiffies + (500 + rc5_key_timeout
* HZ) / 1000;
mod_timer(&ir->timer_keyup, timeout);
/* Save code for repeat test */
ir->last_rc5 = rc5;
}
}
}
