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#include "cfe.h"
#include "lib_types.h"
#include "lib_malloc.h"
#include "lib_printf.h"
#include "cfe_iocb.h"
#include "cfe_device.h"
#include "cfe_ioctl.h"
#include "sbmips.h"
#include "bsp_config.h"
#include "bcm_hwdefs.h"
#include "bcm_map.h"
static void bcm63xx_uart_probe(cfe_driver_t *drv,
unsigned long probe_a, unsigned long probe_b,
void *probe_ptr);
static int bcm63xx_uart_open(cfe_devctx_t *ctx);
static int bcm63xx_uart_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer);
static int bcm63xx_uart_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat);
static int bcm63xx_uart_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer);
static int bcm63xx_uart_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer);
static int bcm63xx_uart_close(cfe_devctx_t *ctx);
const static cfe_devdisp_t bcm63xx_uart_dispatch = {
bcm63xx_uart_open,
bcm63xx_uart_read,
bcm63xx_uart_inpstat,
bcm63xx_uart_write,
bcm63xx_uart_ioctl,
bcm63xx_uart_close,
NULL,
NULL
};
const cfe_driver_t bcm63xx_uart = {
"BCM63xx DUART",
"uart",
CFE_DEV_SERIAL,
&bcm63xx_uart_dispatch,
bcm63xx_uart_probe
};
typedef struct bcm63xx_uart_s {
int baudrate;
} bcm63xx_uart_t;
static void bcm63xx_set_baudrate( bcm63xx_uart_t * softc )
{
uint32_t baudwd;
baudwd = (FPERIPH / softc->baudrate) / 16;
if( baudwd & 0x1 ) {
baudwd = baudwd / 2;
} else {
baudwd = baudwd / 2 - 1;
}
UART->baudword = baudwd;
}
static void bcm63xx_uart_probe(cfe_driver_t *drv,
unsigned long probe_a, unsigned long probe_b,
void *probe_ptr)
{
bcm63xx_uart_t * softc;
char descr[80];
/* enable the transmitter interrupt? */
/*
* probe_a is the DUART base address.
* probe_b is the channel-number-within-duart (0 or 1)
* probe_ptr is unused.
*/
softc = (bcm63xx_uart_t *) KMALLOC(sizeof(bcm63xx_uart_t),0);
if (softc) {
xsprintf( descr, "%s channel %d", drv->drv_description, probe_b );
cfe_attach( drv, softc, NULL, descr );
}
}
static int bcm63xx_uart_open(cfe_devctx_t *ctx)
{
bcm63xx_uart_t * softc = ctx->dev_softc;
/* Enable the UART clock */
softc->baudrate = CFG_SERIAL_BAUD_RATE;
bcm63xx_set_baudrate( softc );
UART->control = BRGEN | TXEN | RXEN;
UART->config = BITS8SYM | ONESTOP;
UART->fifoctl = RSTTXFIFOS | RSTRXFIFOS;
UART->intMask = 0;
return 0;
}
static int bcm63xx_uart_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer)
{
unsigned char * bptr;
int blen;
uint32_t status;
char inval;
bptr = buffer->buf_ptr;
blen = buffer->buf_length;
while (blen > 0) {
status = UART->intStatus;
if(status & (RXOVFERR | RXPARERR | RXFRAMERR | RXBRK)) {
/* RX over flow */
if(status & RXOVFERR) {
/* reset RX FIFO to clr interrupt */
UART->fifoctl |= RSTRXFIFOS;
}
/* other errors just read the bad character to clear the bit */
inval = UART->Data;
}
else if(status & RXFIFONE) {
*bptr++ = UART->Data;
blen--;
}
else
break;
}
buffer->buf_retlen = buffer->buf_length - blen;
return 0;
}
static int bcm63xx_uart_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat)
{
inpstat->inp_status = UART->intStatus & RXFIFONE;
return 0;
}
static int bcm63xx_uart_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer)
{
unsigned char * bptr;
int blen;
uint32_t status;
bptr = buffer->buf_ptr;
blen = buffer->buf_length;
status = 0;
while( (blen > 0) && !status ) {
/* Wait for the buffer to empty before we write the next character */
/* FIXME - The serial port should be able to accept more than one */
/* character at a time. Why doesn't it work though? */
do {
status = UART->intStatus & TXFIFOEMT;
} while( !status );
UART->Data = *bptr;
bptr++;
blen--;
status = UART->intStatus & (TXOVFERR|TXUNDERR);
}
if( status ) {
/* Reset TX FIFO */
UART->fifoctl |= RSTTXFIFOS;
blen++;
}
buffer->buf_retlen = buffer->buf_length - blen;
return 0;
}
static int bcm63xx_uart_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer)
{
bcm63xx_uart_t * softc = ctx->dev_softc;
unsigned int * info = (unsigned int *) buffer->buf_ptr;
switch ((int)buffer->buf_ioctlcmd) {
case IOCTL_SERIAL_GETSPEED:
*info = softc->baudrate;
break;
case IOCTL_SERIAL_SETSPEED:
softc->baudrate = *info;
bcm63xx_set_baudrate( softc );
break;
case IOCTL_SERIAL_GETFLOW:
*info = SERIAL_FLOW_NONE;
break;
case IOCTL_SERIAL_SETFLOW:
break;
default:
return -1;
}
return 0;
}
static int bcm63xx_uart_close(cfe_devctx_t *ctx)
{
/* Turn off the UART clock. */
return 0;
}
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