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Patch from Eric Norum to switch to termios callback structure and

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add support for changing the baudrate.
This commit is contained in:
Joel Sherrill
1998-05-04 12:38:53 +00:00
parent 5ee559acd2
commit 36a14a9699
1 changed files with 85 additions and 15 deletions
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100
c/src/lib/libbsp/m68k/gen68360/console/console.c
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@@ -30,6 +30,11 @@
#include <rtems/libio.h>
#include "m68360.h"
/*
* Declare clock speed -- may be overwritten by downloader or debugger
*/
int m360_clock_rate = 25000000;
/*
* Interrupt-driven input buffer
*/
@@ -50,6 +55,62 @@ static volatile m360BufferDescriptor_t *smcRxBd, *smcTxBd;
/*
* Device-specific routines
*/
/*
* Compute baud-rate-generator configuration register value
*/
static int
smc1BRGC (int baud)
{
int divisor;
int div16 = 0;
divisor = ((m360_clock_rate / 16) + (baud / 2)) / baud;
if (divisor > 4096) {
div16 = 1;
divisor = (divisor + 8) / 16;
}
return M360_BRG_EN | M360_BRG_EXTC_BRGCLK | ((divisor - 1) << 1) | div16;
}
/*
* Hardware-dependent portion of tcsetattr().
*/
static int
smc1SetAttributes (int minor, const struct termios *t)
{
int baud;
switch (t->c_cflag & CBAUD) {
default: baud = -1; break;
case B50: baud = 50; break;
case B75: baud = 75; break;
case B110: baud = 110; break;
case B134: baud = 134; break;
case B150: baud = 150; break;
case B200: baud = 200; break;
case B300: baud = 300; break;
case B600: baud = 600; break;
case B1200: baud = 1200; break;
case B1800: baud = 1800; break;
case B2400: baud = 2400; break;
case B4800: baud = 4800; break;
case B9600: baud = 9600; break;
case B19200: baud = 19200; break;
case B38400: baud = 38400; break;
case B57600: baud = 57600; break;
case B115200: baud = 115200; break;
case B230400: baud = 230400; break;
case B460800: baud = 460800; break;
}
if (baud > 0)
m360.brgc1 = smc1BRGC (baud);
return 0;
}
/*
* Interrupt handler
*/
static rtems_isr
smc1InterruptHandler (rtems_vector_number v)
{
@@ -97,7 +158,7 @@ smc1Initialize (void)
* Set up BRG1 (9,600 baud)
*/
m360.brgc1 = M360_BRG_RST;
m360.brgc1 = M360_BRG_EN | M360_BRG_EXTC_BRGCLK | M360_BRG_9600;
m360.brgc1 = smc1BRGC (9600);
/*
* Put SMC1 in NMSI mode, connect SMC1 to BRG1
@@ -166,7 +227,7 @@ smc1Initialize (void)
}
static int
smc1Read (int minor)
smc1PollRead (int minor)
{
unsigned char c;
@@ -264,25 +325,35 @@ rtems_device_driver console_open(
)
{
rtems_status_code sc;
static const rtems_termios_callbacks intrCallbacks = {
NULL, /* firstOpen */
NULL, /* lastClose */
NULL, /* pollRead */
smc1InterruptWrite, /* write */
smc1SetAttributes, /* setAttributes */
NULL, /* stopRemoteTx */
NULL, /* startRemoteTx */
1 /* outputUsesInterrupts */
};
static const rtems_termios_callbacks pollCallbacks = {
NULL, /* firstOpen */
NULL, /* lastClose */
smc1PollRead, /* pollRead */
smc1PollWrite, /* write */
smc1SetAttributes, /* setAttributes */
NULL, /* stopRemoteTx */
NULL, /* startRemoteTx */
0 /* outputUsesInterrupts */
};
if (m360_smc1_interrupt) {
rtems_libio_open_close_args_t *args = arg;
sc = rtems_termios_open (major, minor, arg,
NULL,
NULL,
NULL,
smc1InterruptWrite,
1);
sc = rtems_termios_open (major, minor, arg, &intrCallbacks);
smc1ttyp = args->iop->data1;
}
else {
sc = rtems_termios_open (major, minor, arg,
NULL,
NULL,
smc1Read,
smc1PollWrite,
0);
sc = rtems_termios_open (major, minor, arg, &pollCallbacks);
}
return sc;
}
@@ -325,7 +396,6 @@ rtems_device_driver console_write(
/*
* Handle ioctl request.
* Should set hardware line speed, bits/char, etc.
*/
rtems_device_driver console_control(
rtems_device_major_number major,