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/*
* Cirrus EP7312 Console Driver
*
* Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE.
*
*
* $Id$
*/
#include <bsp.h> /* Must be before libio.h */
#include <rtems/libio.h>
#include <termios.h>
#include <rtems/bspIo.h>
#include <ep7312.h>
#include <libchip/serial.h>
#include <libchip/sersupp.h>
#define NUM_DEVS 1
int uart_poll_read(int minor);
static int uart_first_open(int major, int minor, void *arg);
static int uart_last_close(int major, int minor, void *arg);
static int uart_read(int minor);
static int uart_write(int minor, const char *buf, int len);
static void uart_init(int minor);
static void uart_write_polled(int minor, char c);
static int uart_set_attributes(int minor, const struct termios *t);
unsigned long Console_Port_Count = NUM_DEVS;
console_data Console_Port_Data[NUM_DEVS];
rtems_device_minor_number Console_Port_Minor = 0;
console_fns uart_fns =
{
libchip_serial_default_probe,
uart_first_open,
uart_last_close,
uart_read,
uart_write,
uart_init,
uart_write_polled,
uart_set_attributes,
FALSE
};
console_tbl Console_Port_Tbl[] = {
{
"/dev/com0", /* sDeviceName */
SERIAL_CUSTOM, /* deviceType */
&uart_fns, /* pDeviceFns */
NULL, /* deviceProbe */
NULL, /* pDeviceFlow */
16, /* ulMargin */
8, /* ulHysteresis */
NULL, /* pDeviceParams */
(uint32_t)EP7312_UARTCR1, /* ulCtrlPort1 */
(uint32_t)EP7312_SYSFLG1, /* ulCtrlPort2 */
(uint32_t)EP7312_UARTDR1, /* ulDataPort */
0, /* getRegister */
0, /* setRegister */
0, /* getData */
0, /* setData */
0, /* ulClock */
0 /* ulIntVector */
}};
static int uart_first_open(int major, int minor, void *arg) {return 0;}
static int uart_last_close(int major, int minor, void *arg) {return 0;}
static int uart_read(int minor)
{
return uart_poll_read(minor);
}
static void uart_write_polled(int minor, char c)
{
uart_write(minor, &c, 1);
}
static int uart_set_attributes(int minor, const struct termios *t)
{
return 0;
}
int uart_poll_read(int minor)
{
volatile uint32_t *data_reg;
volatile uint32_t *ctrl_reg1;
volatile uint32_t *ctrl_reg2;
char c;
int err;
data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort;
ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1;
ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2;
if ((*ctrl_reg2 & EP7312_UART_URXFE1) != 0) {
return -1;
}
err = *data_reg;
c = err & 0xff;
err &= (EP7312_UART_FRMERR | EP7312_UART_PARERR | EP7312_UART_OVERR);
return c;
}
static void _BSP_null_char( char c ) {uart_write_polled(0, c);}
BSP_output_char_function_type BSP_output_char = _BSP_null_char;
static int uart_write(int minor, const char *buf, int len)
{
volatile uint32_t *data_reg;
volatile uint32_t *ctrl_reg1;
volatile uint32_t *ctrl_reg2;
int i;
char c;
data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort;
ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1;
ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2;
for (i = 0; i < len; i++) {
/* Wait for fifo to have room */
while ((*ctrl_reg2 & EP7312_UART_UTXFF1) != 0) {
continue;
}
c = (char) buf[i];
*data_reg = c;
}
return 1;
}
static void uart_init(int minor)
{
volatile uint32_t *data_reg;
volatile uint32_t *ctrl_reg1;
volatile uint32_t *ctrl_reg2;
data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort;
ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1;
ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2;
/* *ctrl_reg = (BSP_UART_DATA8 |
BSP_UART_STOP1 |
BSP_UART_PARITY_NONE |
EP7312_UART_FIFOEN |
BSP_UART_BAUD_9600);
*/
*ctrl_reg1 = (EP7312_UART_WRDLEN8 |
EP7312_UART_FIFOEN |
0x17); /* 9600 baud */
}
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