/*
* Transmit-data-empty ISR
*
* The same routine for all interrupt sources of the same type.
*/
static rtems_isr sh_sci_tx_isr(rtems_vector_number vector)
{
int minor;
for (minor = 0; minor < Console_Port_Count; minor++) {
if (Console_Port_Tbl[minor]->ulDataPort == vector) {
/*
* FIXME: Error handling should be added
*/
/*
* Mask end-of-transmission interrupt
*/
SH_SCI_REG_MASK(SCI_TIE, minor, SCI_SCR);
if (rtems_termios_dequeue_characters(
Console_Port_Data[minor].termios_data, 1)) {
/*
* More characters to be received - interrupt must be enabled
*/
SH_SCI_REG_FLAG(SCI_TIE, minor, SCI_SCR);
}
break;
}
}
}
void
BSP_uart_termios_isr_com2()
{
unsigned char buf[40];
int off, ret, vect;
off = 0;
for(;;)
{
vect = uread(BSP_UART_COM2, IIR) & 0xf;
switch(vect)
{
case NO_MORE_INTR :
/* No more interrupts */
if(off != 0)
{
/* Update rx buffer */
rtems_termios_enqueue_raw_characters(termios_ttyp_com2,
(char *)buf,
off);
}
return;
case TRANSMITTER_HODING_REGISTER_EMPTY :
/*
* TX holding empty: we have to disable these interrupts
* if there is nothing more to send.
*/
ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1);
/* If nothing else to send disable interrupts */
if(ret == 0)
{
uwrite(BSP_UART_COM2, IER,
(RECEIVE_ENABLE |
RECEIVER_LINE_ST_ENABLE
)
);
termios_tx_active_com2 = 0;
}
break;
case RECEIVER_DATA_AVAIL :
case CHARACTER_TIMEOUT_INDICATION:
/* RX data ready */
assert(off < sizeof(buf));
buf[off++] = uread(BSP_UART_COM2, RBR);
break;
case RECEIVER_ERROR:
/* RX error: eat character */
uartError(BSP_UART_COM2);
break;
default:
/* Should not happen */
assert(0);
return;
}
}
}
/**
* @brief sci interrupt handler
*
* Handler checks which interrupt occured and provides nessesary maintenance
* dequeue characters in termios driver whether character is send succesfully
* enqueue characters in termios driver whether character is recieved
*
* @param[in] arg rtems_termios_tty
* @retval Void
*/
static void tms570_sci_interrupt_handler(void * arg)
{
rtems_termios_tty *tty = arg;
tms570_sci_context *ctx = rtems_termios_get_device_context(tty);
char buf[TMS570_SCI_BUFFER_SIZE];
size_t n;
/*
* Check if we have received something.
*/
if ( (ctx->regs->FLR & TMS570_SCI_FLR_RXRDY ) == TMS570_SCI_FLR_RXRDY ) {
n = tms570_sci_read_received_chars(ctx, buf, TMS570_SCI_BUFFER_SIZE);
if ( n > 0 ) {
/* Hand the data over to the Termios infrastructure */
rtems_termios_enqueue_raw_characters(tty, buf, n);
}
}
/*
* Check if we have something transmitted.
*/
if ( (ctx->regs->FLR & TMS570_SCI_FLR_TXRDY ) == TMS570_SCI_FLR_TXRDY ) {
n = tms570_sci_transmitted_chars(ctx);
if ( n > 0 ) {
/*
* Notify Termios that we have transmitted some characters. It
* will call now the interrupt write function if more characters
* are ready for transmission.
*/
rtems_termios_dequeue_characters(tty, n);
}
}
}
/*
* Interrupt handling.
*/
static void
m5xx_sci_interrupt_handler (rtems_irq_hdl_param unused)
{
int minor;
for ( minor = 0; minor < NUM_PORTS; minor++ ) {
sci_desc *desc = &sci_descs[minor];
int sccr1 = desc->regs->sccr1;
int scsr = desc->regs->scsr;
/*
* Character received?
*/
if ((sccr1 & QSMCM_SCI_RIE) && (scsr & QSMCM_SCI_RDRF)) {
char c = desc->regs->scdr;
rtems_termios_enqueue_raw_characters(desc->ttyp, &c, 1);
}
/*
* Transmitter empty?
*/
if ((sccr1 & QSMCM_SCI_TIE) && (scsr & QSMCM_SCI_TDRE)) {
desc->regs->sccr1 &= ~QSMCM_SCI_TIE;
rtems_termios_dequeue_characters (desc->ttyp, 1);
}
}
}
/*
* Interrupt handler
*/
static rtems_isr
smc1InterruptHandler (rtems_vector_number v)
{
/*
* Buffer received?
*/
if (m360.smc1.smce & 0x1) {
m360.smc1.smce = 0x1;
while ((smcRxBd->status & M360_BD_EMPTY) == 0) {
rtems_termios_enqueue_raw_characters (smc1ttyp,
(char *)smcRxBd->buffer,
smcRxBd->length);
smcRxBd->status = M360_BD_EMPTY | M360_BD_WRAP | M360_BD_INTERRUPT;
}
}
/*
* Buffer transmitted?
*/
if (m360.smc1.smce & 0x2) {
m360.smc1.smce = 0x2;
if ((smcTxBd->status & M360_BD_READY) == 0)
rtems_termios_dequeue_characters (smc1ttyp, smcTxBd->length);
}
m360.cisr = 1UL << 4; /* Clear SMC1 interrupt-in-service bit */
}
/* sh4uart2_interrupt_transmit --
* UART interrupt handler routine -- SCI
* It continues transmit data when old part of data is transmitted
*
* PARAMETERS:
* vec - interrupt vector number
*
* RETURNS:
* none
*/
static rtems_isr
sh4uart2_interrupt_transmit(rtems_vector_number vec)
{
volatile uint8_t *ssr1 = (volatile uint8_t *)SH7750_SCSSR1;
volatile uint16_t *scr2 = (volatile uint16_t *)SH7750_SCSCR2;
/* Find UART descriptor from vector number */
sh4uart *uart = &sh4_uarts[1];
if (uart->tx_buf != NULL && uart->tx_ptr < uart->tx_buf_len) {
while ((SCSSR2 & SH7750_SCSSR2_TDFE) != 0) {
int i;
for (i = 0;
i < 16 - TRANSMIT_TRIGGER_VALUE(SCFCR2 & SH7750_SCFCR2_TTRG);
i++)
SCTDR2 = uart->tx_buf[uart->tx_ptr++];
while ((SCSSR1 & SH7750_SCSSR1_TDRE) == 0 ||
(SCSSR1 & SH7750_SCSSR1_TEND) == 0);
*ssr1 &= ~(SH7750_SCSSR1_TDRE | SH7750_SCSSR2_TEND);
}
} else {
register int dequeue = uart->tx_buf_len;
uart->tx_buf = NULL;
uart->tx_ptr = uart->tx_buf_len = 0;
/* Disable interrupts while we do not have any data to transmit */
*scr2 &= ~SH7750_SCSCR_TIE;
rtems_termios_dequeue_characters(uart->tty, dequeue);
}
}
/* sh4uart1_interrupt_transmit --
* UART interrupt handler routine -- SCI
* It continues transmit data when old part of data is transmitted
*
* PARAMETERS:
* vec - interrupt vector number
*
* RETURNS:
* none
*/
static rtems_isr
sh4uart1_interrupt_transmit(rtems_vector_number vec)
{
volatile uint8_t *scr1 = (volatile uint8_t *)SH7750_SCSCR1;
volatile uint8_t *ssr1 = (volatile uint8_t *)SH7750_SCSSR1;
/* Find UART descriptor from vector number */
sh4uart *uart = &sh4_uarts[0];
if (uart->tx_buf != NULL && uart->tx_ptr < uart->tx_buf_len) {
while ((SCSSR1 & SH7750_SCSSR1_TDRE) != 0 &&
uart->tx_ptr < uart->tx_buf_len) {
SCTDR1 = uart->tx_buf[uart->tx_ptr++];
*ssr1 &= ~SH7750_SCSSR1_TDRE;
}
} else {
register int dequeue = uart->tx_buf_len;
uart->tx_buf = NULL;
uart->tx_ptr = uart->tx_buf_len = 0;
/* Disable interrupts while we do not have any data to transmit */
*scr1 &= ~SH7750_SCSCR_TIE;
rtems_termios_dequeue_characters(uart->tty, dequeue);
}
}
/* Handle UART interrupts */
static void apbuart_cons_isr(void *arg)
{
rtems_termios_tty *tty = arg;
rtems_termios_device_context *base;
struct console_dev *condev = rtems_termios_get_device_context(tty);
struct apbuart_priv *uart = condev_get_priv(condev);
struct apbuart_regs *regs = uart->regs;
unsigned int status;
char buf[33];
int cnt;
if (uart->mode == TERMIOS_TASK_DRIVEN) {
if ((status = regs->status) & APBUART_STATUS_DR) {
rtems_interrupt_lock_context lock_context;
/* Turn off RX interrupts */
base = rtems_termios_get_device_context(tty);
rtems_termios_device_lock_acquire(base, &lock_context);
regs->ctrl &=
~(APBUART_CTRL_DI | APBUART_CTRL_RI |
APBUART_CTRL_RF);
rtems_termios_device_lock_release(base, &lock_context);
/* Activate termios RX daemon task */
rtems_termios_rxirq_occured(tty);
}
} else {
/*
* Get all new characters from APBUART RX (FIFO) and store them
* on the stack. Then tell termios about the new characters.
* Maximum APBUART RX FIFO size is 32 characters.
*/
cnt = 0;
while (
((status=regs->status) & APBUART_STATUS_DR) &&
(cnt < sizeof(buf))
) {
buf[cnt] = regs->data;
cnt++;
}
if (0 < cnt) {
/* Tell termios layer about new characters */
rtems_termios_enqueue_raw_characters(tty, &buf[0], cnt);
}
}
if (uart->sending && (status & APBUART_STATUS_TE)) {
/* Tell close that we sent everything */
cnt = uart->sending;
/*
* Tell termios how much we have sent. dequeue() may call
* write_interrupt() to refill the transmitter.
* write_interrupt() will eventually be called with 0 len to
* disable TX interrupts.
*/
rtems_termios_dequeue_characters(tty, cnt);
}
}
rtems_timer_service_routine Tx_ISR(
rtems_id ignored_id,
void *ignored_address
)
{
rtems_termios_dequeue_characters (Ttyp, 1);
(void) rtems_timer_fire_after( Tx_Timer, 10, Tx_ISR, NULL );
}
static rtems_isr mmconsole_interrupt(rtems_vector_number n)
{
char c;
while (MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT) {
c = MM_READ(MM_UART_RXTX);
MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT);
rtems_termios_enqueue_raw_characters(tty, &c, 1);
}
if (MM_READ(MM_UART_STAT) & UART_STAT_TX_EVT) {
MM_WRITE(MM_UART_STAT, UART_STAT_TX_EVT);
rtems_termios_dequeue_characters(tty, 1);
}
lm32_interrupt_ack(1 << MM_IRQ_UART);
}
/**
* @brief Process interrupt.
*/
NS16550_STATIC void ns16550_process( int minor)
{
console_tbl *c = Console_Port_Tbl [minor];
console_data *d = &Console_Port_Data [minor];
ns16550_context *ctx = d->pDeviceContext;
uint32_t port = c->ulCtrlPort1;
getRegister_f get = c->getRegister;
int i = 0;
char buf [SP_FIFO_SIZE];
/* Iterate until no more interrupts are pending */
do {
/* Fetch received characters */
for (i = 0; i < SP_FIFO_SIZE; ++i) {
if ((get( port, NS16550_LINE_STATUS) & SP_LSR_RDY) != 0) {
buf [i] = (char) get(port, NS16550_RECEIVE_BUFFER);
} else {
break;
}
}
/* Enqueue fetched characters */
rtems_termios_enqueue_raw_characters( d->termios_data, buf, i);
/* Check if we can dequeue transmitted characters */
if (ctx->transmitFifoChars > 0
&& (get( port, NS16550_LINE_STATUS) & SP_LSR_THOLD) != 0) {
unsigned chars = ctx->transmitFifoChars;
/*
* We finished the transmission, so clear the number of characters in the
* transmit FIFO.
*/
ctx->transmitFifoChars = 0;
/* Dequeue transmitted characters */
if (rtems_termios_dequeue_characters( d->termios_data, chars) == 0) {
/* Nothing to do */
d->bActive = false;
ns16550_enable_interrupts( c, NS16550_ENABLE_ALL_INTR_EXCEPT_TX);
}
}
} while ((get( port, NS16550_INTERRUPT_ID) & SP_IID_0) == 0);
}
static void atsam_usart_interrupt(void *arg)
{
rtems_termios_tty *tty = arg;
atsam_usart_context *ctx = rtems_termios_get_device_context(tty);
Usart *regs = ctx->regs;
uint32_t csr = regs->US_CSR;
while ((csr & US_CSR_RXRDY) != 0) {
char c = (char) regs->US_RHR;
rtems_termios_enqueue_raw_characters(tty, &c, 1);
csr = regs->US_CSR;
}
if (ctx->transmitting && (csr & US_CSR_TXEMPTY) != 0) {
rtems_termios_dequeue_characters(tty, 1);
}
}
static void imx_uart_tx_isr(rtems_irq_hdl_param param)
{
imx_uart_data_t *uart_data = param;
int len;
int minor = uart_data->minor;
if (uart_data->idx < uart_data->len) {
while ( (uart_data->regs->sr1 & MC9328MXL_UART_SR1_TRDY) &&
(uart_data->idx < uart_data->len)) {
uart_data->regs->txd = uart_data->buf[uart_data->idx];
uart_data->idx++;
}
} else {
len = uart_data->len;
uart_data->len = 0;
imx_uart_data[minor].regs->cr1 &= ~MC9328MXL_UART_CR1_TXMPTYEN;
rtems_termios_dequeue_characters(uart_data->tty, len);
}
}
static void pl050_interrupt(void *arg)
{
int minor = (int) arg;
const console_data *cd = &Console_Port_Data[minor];
volatile pl050 *regs = pl050_get_regs(minor);
uint32_t kmiir_rx = PL050_KMIIR_KMIRXINTR;
uint32_t kmiir_tx = (regs->kmicr & PL050_KMICR_KMITXINTREN) != 0 ?
PL050_KMIIR_KMITXINTR : 0;
uint32_t kmiir = regs->kmiir;
if ((kmiir & kmiir_rx) != 0) {
char c = (char) PL050_KMIDATA_KMIDATA_GET(regs->kmidata);
rtems_termios_enqueue_raw_characters(cd->termios_data, &c, 1);
}
if ((kmiir & kmiir_tx) != 0) {
rtems_termios_dequeue_characters(cd->termios_data, 1);
}
}
static void lpc32xx_hsu_interrupt_handler(void *arg)
{
int minor = (int) arg;
console_tbl *ct = Console_Port_Tbl [minor];
console_data *cd = &Console_Port_Data [minor];
volatile lpc32xx_hsu *hsu = (volatile lpc32xx_hsu *) ct->ulCtrlPort1;
/* Iterate until no more interrupts are pending */
do {
int chars_to_dequeue = (int) cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf [HSU_FIFO_SIZE];
/* Enqueue received characters */
while (i < HSU_FIFO_SIZE) {
uint32_t in = hsu->fifo;
if ((in & HSU_RX_EMPTY) == 0) {
if ((in & HSU_RX_BREAK) == 0) {
buf [i] = in & HSU_RX_DATA_MASK;
++i;
}
} else {
break;
}
}
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* Dequeue transmitted characters */
cd->pDeviceContext = 0;
rv = rtems_termios_dequeue_characters(cd->termios_data, chars_to_dequeue);
if (rv == 0) {
/* Nothing to transmit */
cd->bActive = false;
hsu->ctrl = HSU_CTRL_RX_INTR_ENABLED;
hsu->iir = HSU_IIR_TX;
}
} while ((hsu->iir & HSU_IIR_MASK) != 0);
}
static void erc32_console_isr_b(
rtems_vector_number vector
)
{
console_data *cd = &Console_Port_Data[1];
/* check for error */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
do {
int chars_to_dequeue = (int)cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf[CONSOLE_BUF_SIZE];
/* enqueue received chars */
while (i < CONSOLE_BUF_SIZE) {
if (!(ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRB))
break;
buf[i] = ERC32_MEC.UART_Channel_B;
++i;
}
if ( i )
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* dequeue transmitted chars */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB) {
rv = rtems_termios_dequeue_characters(
cd->termios_data, chars_to_dequeue);
if ( !rv ) {
cd->pDeviceContext = 0;
cd->bActive = false;
}
ERC32_Clear_interrupt (ERC32_INTERRUPT_UART_B_RX_TX);
}
} while (ERC32_Is_interrupt_pending (ERC32_INTERRUPT_UART_B_RX_TX));
}
static void
m8xx_smc2_interrupt_handler (void *unused)
{
int nb_overflow;
/*
* Buffer received?
*/
if (m8xx.smc2.smce & M8xx_SMCE_RX) {
m8xx.smc2.smce = M8xx_SMCE_RX; /* Clear the event */
/* Check that the buffer is ours */
if ((RxBd[SMC2_MINOR]->status & M8xx_BD_EMPTY) == 0) {
rtems_cache_invalidate_multiple_data_lines(
(const void *) RxBd[SMC2_MINOR]->buffer,
RxBd[SMC2_MINOR]->length );
nb_overflow = rtems_termios_enqueue_raw_characters(
(void *)ttyp[SMC2_MINOR],
(char *)RxBd[SMC2_MINOR]->buffer,
(int)RxBd[SMC2_MINOR]->length );
RxBd[SMC2_MINOR]->status = M8xx_BD_EMPTY | M8xx_BD_WRAP |
M8xx_BD_INTERRUPT;
}
}
/*
* Buffer transmitted?
*/
if (m8xx.smc2.smce & M8xx_SMCE_TX) {
m8xx.smc2.smce = M8xx_SMCE_TX; /* Clear the event */
/* Check that the buffer is ours */
if ((TxBd[SMC2_MINOR]->status & M8xx_BD_READY) == 0)
rtems_termios_dequeue_characters (
(void *)ttyp[SMC2_MINOR],
(int)TxBd[SMC2_MINOR]->length);
}
}
static void mpc55xx_esci_interrupt_handler(void *arg)
{
mpc55xx_esci_context *self = arg;
volatile struct ESCI_tag *regs = self->regs;
union ESCI_SR_tag sr = MPC55XX_ZERO_FLAGS;
union ESCI_SR_tag active = MPC55XX_ZERO_FLAGS;
rtems_interrupt_level level;
/* Status */
sr.R = regs->SR.R;
/* Receive data register full? */
if (sr.B.RDRF != 0) {
active.B.RDRF = 1;
}
/* Transmit data register empty? */
if (sr.B.TDRE != 0) {
active.B.TDRE = 1;
}
/* Clear flags */
rtems_interrupt_disable(level);
regs->SR.R = active.R;
self->transmit_in_progress = false;
rtems_interrupt_enable(level);
/* Enqueue */
if (active.B.RDRF != 0) {
char c = regs->DR.B.D;
rtems_termios_enqueue_raw_characters(self->tty, &c, 1);
}
/* Dequeue */
if (active.B.TDRE != 0) {
rtems_termios_dequeue_characters(self->tty, 1);
}
}
rtems_isr
m860_smc1_console_interrupt_handler (rtems_vector_number v)
{
/*
* Buffer received?
*/
if (m860.smc1.smce & 0x1) {
m860.smc1.smce = 0x1;
/* m860.scc2.sccm &= ~0x1;*/
while ((RxBd[SMC1_MINOR]->status & M860_BD_EMPTY) == 0) {
rxBufListTail[SMC1_MINOR]->next = malloc(sizeof(Buf_t));
if (rxBufListTail[SMC1_MINOR]->next) {
rxBufListTail[SMC1_MINOR] = rxBufListTail[SMC1_MINOR]->next;
rxBufListTail[SMC1_MINOR]->buf = RxBd[SMC1_MINOR]->buffer;
rxBufListTail[SMC1_MINOR]->len = RxBd[SMC1_MINOR]->length;
rxBufListTail[SMC1_MINOR]->pos = 0;
rxBufListTail[SMC1_MINOR]->next = 0;
RxBd[SMC1_MINOR]->buffer = malloc(RXBUFSIZE);
}
RxBd[SMC1_MINOR]->status = M860_BD_EMPTY | M860_BD_WRAP |
M860_BD_INTERRUPT;
}
}
/*
* Buffer transmitted?
*/
#if 0
if (m860.smc1.smce & 0x2) {
m860.smc1.smce = 0x2;
if ((smcTxBd->status & M360_BD_READY) == 0)
rtems_termios_dequeue_characters (smc1ttyp, smcTxBd->length);
}
#endif
m860.cisr = 1UL << 4; /* Clear SMC1 interrupt-in-service bit */
}
/* Handle UART interrupts */
static void leon3_console_isr(void *arg)
{
struct apbuart_priv *uart = arg;
unsigned int status;
char data;
/* Get all received characters */
while ((status=uart->regs->status) & LEON_REG_UART_STATUS_DR) {
/* Data has arrived, get new data */
data = uart->regs->data;
/* Tell termios layer about new character */
rtems_termios_enqueue_raw_characters(uart->cookie, &data, 1);
}
if (
(status & LEON_REG_UART_STATUS_THE)
&& (uart->regs->ctrl & LEON_REG_UART_CTRL_TI) != 0
) {
/* write_interrupt will get called from this function */
rtems_termios_dequeue_characters(uart->cookie, 1);
}
}
/**
* @brief Process interrupt.
*/
NS16550_STATIC void ns16550_process( int minor)
{
console_tbl *c = Console_Port_Tbl [minor];
console_data *d = &Console_Port_Data [minor];
NS16550Context *ctx = d->pDeviceContext;
uint32_t port = c->ulCtrlPort1;
getRegister_f get = c->getRegister;
int i;
char buf [SP_FIFO_SIZE];
/* Iterate until no more interrupts are pending */
do {
/* Fetch received characters */
i = 0;
while ((get(port, NS16550_LINE_STATUS) & SP_LSR_RDY) != 0) {
buf[i++] = (char) get(port, NS16550_RECEIVE_BUFFER);
if (i == SP_FIFO_SIZE) {
/* Enqueue fetched characters */
rtems_termios_enqueue_raw_characters( d->termios_data, buf, i);
i = 0;
}
}
if (i > 0)
rtems_termios_enqueue_raw_characters( d->termios_data, buf, i);
/* Check if we can dequeue transmitted characters */
if (ctx->transmitFifoChars > 0
&& (get( port, NS16550_LINE_STATUS) & SP_LSR_THOLD) != 0) {
/* Dequeue transmitted characters */
rtems_termios_dequeue_characters(
d->termios_data,
ctx->transmitFifoChars
);
}
} while ((get( port, NS16550_INTERRUPT_ID) & SP_IID_0) == 0);
}
static void apbuart_isr(void *arg)
{
rtems_termios_tty *tty = arg;
struct apbuart_context *uart = rtems_termios_get_device_context(tty);
unsigned int status;
char data;
/* Get all received characters */
while ((status=uart->regs->status) & APBUART_STATUS_DR) {
/* Data has arrived, get new data */
data = uart->regs->data;
/* Tell termios layer about new character */
rtems_termios_enqueue_raw_characters(tty, &data, 1);
}
if (
(status & APBUART_STATUS_TE)
&& (uart->regs->ctrl & APBUART_CTRL_TI) != 0
) {
/* write_interrupt will get called from this function */
rtems_termios_dequeue_characters(tty, 1);
}
}
/***************************************************************************
Function : IntUartInterruptHandler
Description : This is the interrupt handler for the internal uart. It
determines which channel caused the interrupt before queueing any received
chars and dequeueing chars waiting for transmission.
***************************************************************************/
static rtems_isr
IntUartInterruptHandler(rtems_vector_number v)
{
unsigned int chan = v - UART_INTC0_IRQ_VECTOR(0);
struct IntUartInfoStruct *info = &IntUartInfo[chan];
/* check to see if received data */
if ( MCF5282_UART_UISR(chan) & MCF5282_UART_UISR_RXRDY )
{
/* read data and put into the receive buffer */
while ( MCF5282_UART_USR(chan) & MCF5282_UART_USR_RXRDY )
{
if ( MCF5282_UART_USR(chan) & MCF5282_UART_USR_ERROR )
{
/* clear the error */
MCF5282_UART_UCR(chan) = MCF5282_UART_UCR_RESET_ERROR;
}
/* put data in rx buffer and check for errors */
info->rx_buffer[info->rx_in] = MCF5282_UART_URB(chan);
/* update buffer values */
info->rx_in++;
if ( info->rx_in >= RX_BUFFER_SIZE )
{
info->rx_in = 0;
}
}
/* Make sure the port has been opened */
if ( info->ttyp )
{
/* check to see if task driven */
if ( info->iomode == TERMIOS_TASK_DRIVEN )
{
/* notify rx task that rx buffer has data */
rtems_termios_rxirq_occured(info->ttyp);
}
else
{
/* Push up the received data */
rtems_termios_enqueue_raw_characters(info->ttyp, info->rx_buffer, info->rx_in);
info->rx_in = 0;
}
}
}
/* check to see if data needs to be transmitted */
if ( ( info->uimr & MCF5282_UART_UIMR_TXRDY ) &&
( MCF5282_UART_UISR(chan) & MCF5282_UART_UISR_TXRDY ) )
{
/* disable tx interrupts */
info->uimr &= ~MCF5282_UART_UIMR_TXRDY;
MCF5282_UART_UIMR(chan) = info->uimr;
/* tell upper level that character has been sent */
if ( info->ttyp )
rtems_termios_dequeue_characters(info->ttyp, 1);
}
}
void
BSP_uart_termios_isr_com2(void *ignored)
{
unsigned char buf[40];
unsigned char val;
int off, ret, vect;
off = 0;
for(;;)
{
vect = uread(BSP_UART_COM2, IIR) & 0xf;
switch(vect)
{
case MODEM_STATUS :
val = uread(BSP_UART_COM2, MSR);
if(uart_data[BSP_UART_COM2].hwFlow)
{
if(val & CTS)
{
/* CTS high */
termios_stopped_com2 = 0;
if(termios_tx_hold_valid_com2)
{
termios_tx_hold_valid_com2 = 0;
BSP_uart_termios_write_com2(0, &termios_tx_hold_com2,
1);
}
}
else
{
/* CTS low */
termios_stopped_com2 = 1;
}
}
break;
case NO_MORE_INTR :
/* No more interrupts */
if(off != 0)
{
/* Update rx buffer */
if( driver_input_handler_com2 )
{
driver_input_handler_com2( termios_ttyp_com2, (char *)buf, off );
}
else
{
rtems_termios_enqueue_raw_characters(termios_ttyp_com2, (char *)buf, off);
}
}
return;
case TRANSMITTER_HODING_REGISTER_EMPTY :
/*
* TX holding empty: we have to disable these interrupts
* if there is nothing more to send.
*/
/* If nothing else to send disable interrupts */
ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1);
if ( ret == 0 ) {
termios_tx_active_com2 = 0;
uart_data[BSP_UART_COM2].ier &= ~(TRANSMIT_ENABLE);
uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier);
}
break;
case RECEIVER_DATA_AVAIL :
case CHARACTER_TIMEOUT_INDICATION:
if ( uart_data[BSP_UART_COM2].ioMode == TERMIOS_TASK_DRIVEN ) {
/* ensure interrupts are enabled */
if ( uart_data[BSP_UART_COM2].ier & RECEIVE_ENABLE ) {
/* disable interrupts and notify termios */
uart_data[BSP_UART_COM2].ier &= ~(RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE);
uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier);
rtems_termios_rxirq_occured(termios_ttyp_com2);
}
}
else {
/* RX data ready */
assert(off < sizeof(buf));
buf[off++] = uread(BSP_UART_COM2, RBR);
}
break;
case RECEIVER_ERROR:
/* RX error: eat character */
uartError(BSP_UART_COM2);
break;
default:
/* Should not happen */
assert(0);
return;
}
}
}
/*
* Interrupt handler
*/
static rtems_isr
sccInterruptHandler (void *arg)
{
int chan = (int)arg;
/*
* Buffer received?
*/
if (CHN_EVENT_GET(chan) & 0x1) {
/*
* clear SCC event flag
*/
CHN_EVENT_CLR(chan,0x01);
/*
* process event
*/
while ((sccCurrRxBd[chan]->status & M8xx_BD_EMPTY) == 0) {
if (sccttyp[chan] != NULL) {
rtems_cache_invalidate_multiple_data_lines((void *)sccCurrRxBd[chan]->buffer,
sccCurrRxBd[chan]->length);
rtems_termios_enqueue_raw_characters (sccttyp[chan],
(char *)sccCurrRxBd[chan]->buffer,
sccCurrRxBd[chan]->length);
}
/*
* clear status
*/
sccCurrRxBd[chan]->status =
(sccCurrRxBd[chan]->status
& (M8xx_BD_WRAP | M8xx_BD_INTERRUPT))
| M8xx_BD_EMPTY;
/*
* advance to next BD
*/
if ((sccCurrRxBd[chan]->status & M8xx_BD_WRAP) != 0) {
sccCurrRxBd[chan] = sccFrstRxBd[chan];
}
else {
sccCurrRxBd[chan]++;
}
}
}
/*
* Buffer transmitted?
*/
if (CHN_EVENT_GET(chan) & 0x2) {
/*
* then clear interrupt event bit
*/
CHN_EVENT_CLR(chan,0x2);
/*
* and signal successful transmit to termios
*/
/*
* FIXME: multiple dequeue calls for multiple buffers
*/
while((sccDequTxBd[chan] != sccPrepTxBd[chan]) &&
((sccDequTxBd[chan]->status & M8xx_BD_READY) == 0)) {
if (sccttyp[chan] != NULL) {
rtems_termios_dequeue_characters (sccttyp[chan],
sccDequTxBd[chan]->length);
}
/*
* advance to next BD
*/
if ((sccDequTxBd[chan]->status & M8xx_BD_WRAP) != 0) {
sccDequTxBd[chan] = sccFrstTxBd[chan];
}
else {
sccDequTxBd[chan]++;
}
}
}
}
Z85C30_STATIC void z85c30_process(
int minor,
uint8_t ucIntPend
)
{
uint32_t ulCtrlPort;
volatile uint8_t z85c30_status;
char cChar;
setRegister_f setReg;
getRegister_f getReg;
ulCtrlPort = Console_Port_Tbl[minor].ulCtrlPort1;
setReg = Console_Port_Tbl[minor].setRegister;
getReg = Console_Port_Tbl[minor].getRegister;
/*
* Deal with any received characters
*/
while (ucIntPend&SCC_RR3_B_RX_IP)
{
z85c30_status = (*getReg)(ulCtrlPort, SCC_WR0_SEL_RD0);
if (!Z85C30_Status_Is_RX_character_available(z85c30_status)) {
break;
}
/*
* Return the character read.
*/
cChar = (*getReg)(ulCtrlPort, SCC_WR0_SEL_RD8);
rtems_termios_enqueue_raw_characters(
Console_Port_Data[minor].termios_data,
&cChar,
1
);
}
/*
* There could be a race condition here if there is not yet a TX
* interrupt pending but the buffer is empty. This condition has
* been seen before on other z8530 drivers but has not been seen
* with this one. The typical solution is to use "vector includes
* status" or to only look at the interrupts actually pending
* in RR3.
*/
while (true) {
z85c30_status = (*getReg)(ulCtrlPort, SCC_WR0_SEL_RD0);
if (!Z85C30_Status_Is_TX_buffer_empty(z85c30_status)) {
/*
* We'll get another interrupt when
* the transmitter holding reg. becomes
* free again and we are clear to send
*/
break;
}
#if 0
if (!Z85C30_Status_Is_CTS_asserted(z85c30_status)) {
/*
* We can't transmit yet
*/
(*setReg)(ulCtrlPort, SCC_WR0_SEL_WR0, SCC_WR0_RST_TX_INT);
/*
* The next state change of CTS will wake us up
*/
break;
}
#endif
rtems_termios_dequeue_characters(Console_Port_Data[minor].termios_data, 1);
if (rtems_termios_dequeue_characters(
Console_Port_Data[minor].termios_data, 1)) {
if (Console_Port_Tbl[minor].pDeviceFlow != &z85c30_flow_RTSCTS) {
z85c30_negate_RTS(minor);
}
Console_Port_Data[minor].bActive = FALSE;
z85c30_enable_interrupts(minor, SCC_ENABLE_ALL_INTR_EXCEPT_TX);
(*setReg)(ulCtrlPort, SCC_WR0_SEL_WR0, SCC_WR0_RST_TX_INT);
break;
}
}
if (ucIntPend & SCC_RR3_B_EXT_IP) {
/*
* Clear the external status interrupt
*/
(*setReg)(ulCtrlPort, SCC_WR0_SEL_WR0, SCC_WR0_RST_INT);
z85c30_status = (*getReg)(ulCtrlPort, SCC_WR0_SEL_RD0);
}
/*
* Reset interrupts
*/
(*setReg)(ulCtrlPort, SCC_WR0_SEL_WR0, SCC_WR0_RST_HI_IUS);
}
/******************************************************
Name: InterruptHandler
Input parameters: vector number
Output parameters: -
Description: UART ISR Routine, called by _RTEMS_ISR
*****************************************************/
rtems_isr
InterruptHandler (rtems_vector_number v)
{
char ch;
/*****************************************************************************
** CHANNEL A **
*****************************************************************************/
/* check Received Break*/
if (DUSRA & m340_RB) {
Error_Status_A |= m340_RB;
/* reset error status */
DUCRA = m340_Reset_Error_Status;
}
/* buffer received ? */
if (DUSRA & m340_Rx_RDY) {
do {
/* error encountered? */
if (DUSRA & (m340_OE | m340_PE | m340_FE | m340_RB)) {
Error_Status_A |= DUSRA;
/* reset error status */
DUCRA = m340_Reset_Error_Status;
/* all the characters in the queue may not be good */
while (DUSRA & m340_Rx_RDY)
/* push them in a trash */
ch = DURBA;
}
else {
/* this is necessary, otherwise it blocks when FIFO is full */
ch = DURBA;
rtems_termios_enqueue_raw_characters(ttypA,&ch,1);
}
} while (DUSRA & m340_Rx_RDY);
Restart_Fifo_Full_A_Timer(); /* only if necessary (pointer to a fake function if
not in FIFO full mode) */
}
else /* if no character has been received */
Restart_Check_A_Timer(); /* same remark */
/* ready to accept a character ? */
if (DUISR & DUIER_mirror & m340_TxRDYA) {
Disable_Interrupts_Tx_A;
/* one character has been transmitted */
rtems_termios_dequeue_characters(ttypA,1);
}
/*****************************************************************************
** CHANNEL B **
*****************************************************************************/
/* check Received Break*/
if (DUSRB & m340_RB) {
Error_Status_B |= m340_RB;
/* reset error status */
DUCRB = m340_Reset_Error_Status;
}
/* buffer received ? */
if (DUSRB & m340_Rx_RDY) {
do {
if (DUSRB & (m340_OE | m340_PE | m340_FE | m340_RB)) {
Error_Status_B |= DUSRB;
/* reset error status */
DUCRB = m340_Reset_Error_Status;
/* all the characters in the queue may not be good */
while (DUSRB & m340_Rx_RDY)
/* push them in a trash */
ch = DURBB;
}
else {
ch = DURBB;
rtems_termios_enqueue_raw_characters(ttypB,&ch,1);
}
} while (DUSRB & m340_Rx_RDY);
Restart_Fifo_Full_B_Timer();
}
else /* if no character has been received */
Restart_Check_B_Timer();
/* ready to accept a character ? */
if (DUISR & DUIER_mirror & m340_TxRDYB) {
Disable_Interrupts_Tx_B;
/* one character has been transmitted */
rtems_termios_dequeue_characters(ttypB,1);
}
}
