📄 gamectrl.c
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/* We only care the case when system code matches */
if (((dataIR >> 6) & 0x1f) == sysIRcode) {
unsigned int prevctlbit;
prevctlbit = IR_ctlbit;
IR_ctlbit = (dataIR >> 11) & 1;
if ((unsigned int) IR_ctlbit != prevctlbit) {
int tmp = (dataIR >> 12) & 1;
if (tmp) tmp = 0x40;
codeIR = (dataIR & 0x3f) | tmp | 0x100;
IR_rep_cnt = 0;
} else
IR_rep_cnt++;
IR_int_time = (unsigned int) mvd[riface_timer2];
}
stateIR = IR_IDLE;
}
}
}
#endif /* IR_PHILIPS */
/* Interrupt via 3881 */
void IR_recv_interrupt_service(status)
unsigned int status;
{
unsigned char width;
int overflow = 0;
int clear = 0x4;
if (status & 0x80) {
overflow = 1; /* 3881's clock overflowed */
clear = 0x84; /* Clear the overflow bit */
}
width = DSC_cmd(dsc_ir_diffm, 0); /* Get the counter */
DSC_cmd(dsc_sys_status, clear); /* Clear 3881's IR int */
mvd[riface_clear_dbgirq] = 0; /* Clear 3210's debug_irq */
#if (IR_NEC || IR_SANYO)
IR_core_NEC((unsigned int) width, overflow);
#endif /* IR_NEC || IR_SAYNO */
#ifdef IR_PHILIPS
if (!trigger_edge)
DSC_INIT_IR(1, DSC_RISING_EDGE, 0); /* detect rising edge */
else
DSC_INIT_IR(1, DSC_FALLING_EDGE, 0); /* detect falling edge */
IR_core_Philips((unsigned int) width);
trigger_edge = 1-trigger_edge;
#endif /* IR_PHILIPS */
}
#else
/* For the original style of IR handling */
/************************************************************************
* Local typedef. *
************************************************************************/
typedef struct {
unsigned char level; /* Assert this output level */
unsigned char next; /* Goto this state */
unsigned short timer; /* Timer1 value (need to << 9) */
} IR_XMIT_INFO;
/************************************************************************
* Local variables. *
************************************************************************/
#ifdef IRQSHARE
PRIVATE unsigned int xor1value = 1;
#endif IRQSHARE
/* For IR receiving */
PRIVATE unsigned int prevIRtime = 0; /* Last time IR intr. happens */
PRIVATE unsigned short dataIR; /* System/customer IR code */
PRIVATE unsigned int diffIR[2]; /* Array to store time gap */
PRIVATE char cntIRchg = 0; /* Number of unprocessed IR intr*/
PRIVATE char cntIRbits = 0; /* Number of IR sys/cust. bits */
PRIVATE char killIR = 0; /* Whether to "kill" next IR bit*/
PRIVATE volatile char stateIR = IR_IDLE; /* IR state machine state */
#ifdef IR_SANYO
PRIVATE unsigned short IR_sanyo_codebar;/* Sanyo IR only */
#endif /* IR_SAYNO */
#ifdef IRREP
PRIVATE unsigned char previous_data; /* Record the previous id code */
#endif
#ifdef IRXMT
/* For IR transmission */
PRIVATE unsigned char IR_xmit_state = IR_XMIT_IDLE;
PRIVATE unsigned char IR_xmit_bitcount = 0;
PRIVATE unsigned int IR_xmit_code;
PRIVATE char origConnectInOut;
/* State machine for transmitting IR */
PRIVATE IR_XMIT_INFO IR_xmit_array[] = { /* Current state */
{0, IR_XMIT_LEADER_LOW, IRW_LEADER_LOW}, /* IR_XMIT_IDLE */
{1, IR_XMIT_LEADER_HIGH, IRW_LEADER_HIGH}, /* IR_XMIT_LEADER_LOW */
{0, IR_XMIT_GAP, IRW_GAP_LOW}, /* IR_XMIT_LEADER_HIGH */
{0, IR_XMIT_GAP, IRW_GAP_LOW}, /* IR_XMIT_DATA */
{1, IR_XMIT_DATA, IRW_DATA_ONE}, /* IR_XMIT_GAP *
* (Possible targets *
* are IDLE, DATA, and *
* REP_HIGH1) */
{0, IR_XMIT_REP_LOW1, IRW_REP_LOW1}, /* IR_XMIT_REP_HIGH1 */
{1, IR_XMIT_REP_HIGH2, IRW_REP_HIGH2}, /* IR_XMIT_REP_LOW1 */
{0, IR_XMIT_REP_LOW2, IRW_REP_LOW2}, /* IR_XMIT_REP_HIGH2 */
/* IR_XMIT_REP_LOW2 *
* (disable timer1) */
};
#endif
/************************************************************************
* Local routines. *
************************************************************************/
PRIVATE void IR_core_NEC(int);
PRIVATE void IR_core_Philips(int);
#ifdef IRXMT
PRIVATE void RISC_start_timer1(unsigned int);
#endif
/************************************************************************
* Start timer1 (for transmitting IR signals) *
************************************************************************/
#ifdef IRXMT
PRIVATE void RISC_start_timer1(period)
unsigned int period;
{
mvd[riface_clear_timer1] = 0;
mvd[riface_timer1] = 0 - (period << 9);
/*
* Since this routine will be called repeatedly, it is better
* to enable interrupt outside.
*/
}
#endif
/*
* Initialization. Properly set internal XOR's input value, then turn
* on interrupt.
*/
void IR_init()
{
#ifdef IRQSHARE
CLEAR_IRXOR;
/* SET_XOR1;
xor1value = 1;*/
CLEAR_XOR1;
xor1value = 0;
#else
#ifdef FLIP_IR
/*
* If incoming IR signal is flipped, then the first incoming edge
* will be a rising edge, so we need to clear the build-in
* XOR gate.
*/
CLEAR_IRXOR;
#else
SET_IRXOR; /* Set IR XOR to high at first */
#endif
#endif IRQSHARE
#ifdef IRXMT
if (!connect_inout) {
OUTIR_HIGH; /* IR output */
}
#endif
ASSIGN_SYSCODE; /* initialize sys code */
#ifdef IR_SANYO
IR_sanyo_codebar = (~sysIRcode) & 0x1fff;
#endif /* IR_SANYO */
#if defined(WEBDVD) && defined(SLAVE)
CLEAR_AUX0;
_8259_ICW = 0x16;
_8259_OCW = 0;
SET_AUX0;
#endif
mvd[riface_clear_dbgirq] = 0; /* Clear debug_irq */
enable_int(debug);
}
#if (IR_NEC || IR_SANYO)
PRIVATE void IR_core_NEC(falling_edge)
int falling_edge;
{
unsigned int *ir_tbl;
#define LEADER_LOW_MIN ir_tbl[0]
#define LEADER_LOW_MAX ir_tbl[1]
#define LEADER_HIGH_MIN ir_tbl[2]
#define LEADER_HIGH_MAX ir_tbl[3]
#define DATA_1_MIN ir_tbl[4]
#define DATA_1_MAX ir_tbl[5]
#define DATA_0_MIN ir_tbl[6]
#define DATA_0_MAX ir_tbl[7]
#ifdef IRREP
#define REPEAT_HIGH_MIN ir_tbl[8]
#define REPEAT_HIGH_MAX ir_tbl[9]
#define REPEAT_DATA_MIN ir_tbl[10]
#define REPEAT_DATA_MAX ir_tbl[11]
#endif
ir_tbl = IR_powerup_tbl;
/* First IR interrupt should be a falling edge */
if (stateIR == IR_IDLE) {
if (falling_edge) stateIR = IR_LEADER_LOW;
else cntIRchg = prevIRtime = 0;
}
/*
* We only process things when we get 2 bits (i.e. 2 time period).
*/
if (cntIRchg == 2) {
unsigned char data;
char reset = 0;
unsigned int width;
cntIRchg = 0;
width = diffIR[1];
if (stateIR == IR_CUSTOM) {/* Put most common case first */
/*
* We are collecting system code or custom code
*/
width += diffIR[0]; /* Get data + gap */
dataIR <<= 1;
if ((width >= DATA_1_MIN) && (width <= DATA_1_MAX)) {
dataIR |= 0x1;
} else if ((width < DATA_0_MIN) || (width > DATA_1_MAX)) {
#ifdef IR_NEC
/*
* I am assert kill here because we may not recognize
* the singal because our checks are too tight; yet
* the external micro controller can still recognize it.
* By killing it, we guarantee that external logic won't
* recognize it.
*
* However, there may also be a downside: if IR input
* has noise, the external micro controll may still
* properly receive signal if we don't kill the input;
* if killIR is asserted, then this may be a problem.
*/
killIR = 1;
reset = 1;
#endif /* IR_NEC */
#ifdef IR_SANYO
if (cntIRbits == 0) {
/*
* SANYO's repeat is the same as leader low/high.
* So we may mistaken repeat as a new code. So if
* we are broken on the first bit of new cutsom code,
* we shall assume it is a new code overall.
*
* The last one is probably a repeat, so this is
* really the first bit of leader low.
*/
cntIRchg = 1; /* We just need one more edge */
stateIR = IR_LEADER_LOW;
} else {
killIR = 1;
reset = 1;
}
#endif /* IR_SANYO */
}
cntIRbits++;
#ifdef IR_NEC
/* First 16 bits are syscode */
if ((cntIRbits == 16) && (dataIR != sysIRcode))
reset = 1;
if (cntIRbits == 24) {
#ifdef CUST71
data = dataIR & 0x01;
if (data)
reset = 1;
else
#endif
{
/*
* We will not wait for data bar. Base on data, we'll
* decide whether we want to pass the IR to CD loader.
* If we decided that the code shouldn't be passed on,
* we'll intentionally destroy the output IR so CD
* loader will not get it.
*/
data = dataIR & 0xff;
/* reverse data bits to fit look up table */
mvd[riface_reflect] = data;
data = mvd[riface_reflect];
#ifdef IRREP
previous_data = data;
#endif
codeIR = data | 0x100; /* Indicate a new code */
/* Get the kill bit from the kill IR table */
#ifdef IRXMT
killIR = tblKillIR[data >> 3] & ptrLshift[data & 7];
#endif
}
} else if (cntIRbits == 32) reset = 1;
#endif /* IR_NEC */
#ifdef IR_SANYO
if (cntIRbits == 13) {
dataIR &= 0x1fff;
if (dataIR != sysIRcode) reset = 1;
dataIR = 0;
} else if (cntIRbits == 26) {
unsigned short tmp = (~sysIRcode) & 0x1fff;
if (dataIR != tmp) reset = 1;
dataIR = 0;
} else if (cntIRbits == 34) {
data = dataIR;
mvd[riface_reflect] = data;
data = mvd[riface_reflect];
codeIR = data;
dataIR = 0;
} else if (cntIRbits == 42) {
data = dataIR;
mvd[riface_reflect] = data;
data = ~(mvd[riface_reflect]);
if (data == codeIR) {
codeIR = data | 0x100;
} else codeIR = 0;
reset = 1;
}
#endif /* IR_SANYO */
} else if (stateIR == IR_LEADER_LOW) {
if ((width >= LEADER_LOW_MIN) && (width <= LEADER_LOW_MAX)) {
stateIR = IR_LEADER_HIGH;
cntIRchg = 1; /* We'll only collect 1 change next time */
} else reset = 1;
#ifdef IRREP
} else if (stateIR == IR_REPEAT) {
if ((width >= REPEAT_DATA_MIN) && (width <= REPEAT_DATA_MAX)) {
/* the width is 0.56 ms */
if (repeat_IRkey_allowed(previous_data))
codeIR = previous_data | 0x100; /* Indicate a new code */
}
reset = 1;
#endif
} else {
/* stateIR has to be equal to IR_LEADER_HIGH */
if ((width >= LEADER_HIGH_MIN) && (width <= LEADER_HIGH_MAX)) {
dataIR = cntIRbits = 0;
stateIR = IR_CUSTOM;
#ifdef IRREP
} else if ((width >= REPEAT_HIGH_MIN) &&
(width <= REPEAT_HIGH_MAX)) {
/* if the width is 2.25 ms, it is repeat code leader */
cntIRchg = 1; /* We'll only collect 1 change next time */
stateIR = IR_REPEAT;
#endif
} else reset = 1;
}
if (reset) {
/* Reset all, start from the very beginning */
stateIR = IR_IDLE;
cntIRchg = prevIRtime = 0;
}
}
}
#endif /* IR_NEC || IR_SAYNO */
#ifdef IR_PHILIPS
PRIVATE unsigned int data_half = 0; /* Mark whether or nor have half_bit
data before edge of intr. coming*/
PRIVATE void IR_core_Philips(falling_edge)
int falling_edge;
{
unsigned int *ir_tbl;
unsigned int width;
int reset;
int is_half_bit;
int is_full_bit;
#define HALFBIT_MIN ir_tbl[0]
#define HALFBIT_MAX ir_tbl[1]
#define ONEBIT_MIN ir_tbl[2]
#define ONEBIT_MAX ir_tbl[3]
ir_tbl = T_IR_powerup_tbl;
width = diffIR[0];
cntIRchg = 0;
reset = 0;
is_half_bit = (width >= HALFBIT_MIN) && (width <= HALFBIT_MAX);
is_full_bit = (width >= ONEBIT_MIN) && (width <= ONEBIT_MAX);
if (stateIR == IR_IDLE) {
if (falling_edge) stateIR = IR_LEADER;
else prevIRtime = 0;
} else if (stateIR == IR_LEADER) {
/* We shall get a rising edge, since the first bit is fixed */
dataIR = 0;
cntIRbits = 0;
stateIR = IR_CUSTOM;
if (is_half_bit) data_half = 0;
else if (is_full_bit) data_half = 1;
else {
stateIR = IR_IDLE;
prevIRtime = 0;
}
} else {
if (data_half) {
/*
* We were in half bit position, so this edge shall either
* conclude the previous cycle or go the the half position
* of the next bit. Record the last bit.
*/
dataIR <<= 1;
if (falling_edge) dataIR |= 1;
cntIRbits++;
if (is_half_bit) data_half = 0;
else if (!is_full_bit) reset = 1;
} else {
/*
* We started at a sampling cycle, so we shall only get half bit,
* otherwise, something is wrong!
*/
if (is_half_bit) data_half = 1;
else reset = 1;
}
if ((cntIRbits == 12) && !falling_edge && data_half) {
/* This is the last rising edge, no more. So collect the bit */
dataIR <<= 1;
dataIR |= 1;
cntIRbits = 13;
}
if (reset) {
/*
* Abnormal exist. Maybe we are out of sync. If this
* is falling edge, maybe this is the sync of a new
* input!
*/
stateIR = IR_IDLE;
if (falling_edge) stateIR = IR_LEADER;
} else if (cntIRbits == 13) {
/* We only care the case when system code matches */
if (((dataIR >> 6) & 0x1f) == sysIRcode) {
unsigned int prevctlbit;
prevctlbit = IR_ctlbit;
IR_ctlbit = (dataIR >> 11) & 1;
if ((unsigned int) IR_ctlbit != prevctlbit) {
int tmp = (dataIR >> 12) & 1;
if (tmp) tmp = 0x40;
codeIR = (dataIR & 0x3f) | tmp | 0x100;
IR_rep_cnt = 0;
} else
IR_rep_cnt++;
IR_int_time = (unsigned int) mvd[riface_timer2];
}
stateIR = IR_IDLE;
}
}
}
#endif /* IR_PHILIPS */
/*
* DBG IRQ INTERUPT SERVICE for IR
*
* This routine recognizes IR input and selectively retransmit signals.
*/
void IR_recv_interrupt_service()
{
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