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Started rs232 porting to userland; increased version number for new cd.

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This commit is contained in:
Ben Gras 2005-05-13 12:29:10 +00:00
parent e248f7c1a3
commit d422461289
3 changed files with 62 additions and 39 deletions
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3
drivers/tty/Makefile
View file

@ -16,8 +16,7 @@ CFLAGS = -I$i
LDFLAGS = -i
LIBS = -lsys -lutils -ltimers
OBJ = tty.o console.o vidcopy.o keyboard.o pty.o
# rs232.o
OBJ = tty.o console.o vidcopy.o keyboard.o pty.o rs232.o
# build local binary
all build: $(DRIVER)

96
drivers/tty/rs232.c
View file

@ -1,4 +1,3 @@
#define USER_SPACE 1
#include <minix/config.h>
/*==========================================================================*
@ -11,10 +10,6 @@
#include <signal.h>
#include "tty.h"
#if USER_SPACE
typedef u16_t port_t;
#endif
#if NR_RS_LINES > 0
#if (MACHINE != IBM_PC) && (MACHINE != ATARI)
@ -123,19 +118,19 @@ typedef u16_t port_t;
* OUT2 is also kept high all the time.
*/
#define istart(rs) \
(outb((rs)->modem_ctl_port, MC_OUT2 | MC_RTS | MC_DTR), \
(sys_outb((rs)->modem_ctl_port, MC_OUT2 | MC_RTS | MC_DTR), \
(rs)->idevready = TRUE)
#define istop(rs) \
(outb((rs)->modem_ctl_port, MC_OUT2 | MC_DTR), \
(sys_outb((rs)->modem_ctl_port, MC_OUT2 | MC_DTR), \
(rs)->idevready = FALSE)
/* Macro to tell if device is ready. The rs->cts field is set to MS_CTS if
* CLOCAL is in effect for a line without a CTS wire.
*/
#define devready(rs) ((inb(rs->modem_status_port) | rs->cts) & MS_CTS)
#define devready(rs) ((my_inb(rs->modem_status_port) | rs->cts) & MS_CTS)
/* Macro to tell if transmitter is ready. */
#define txready(rs) (inb(rs->line_status_port) & LS_TRANSMITTER_READY)
#define txready(rs) (my_inb(rs->line_status_port) & LS_TRANSMITTER_READY)
/* Macro to tell if carrier has dropped.
* The RS232 Carrier Detect (CD) line is usually connected to the 8250
@ -145,7 +140,7 @@ typedef u16_t port_t;
* dropped.
*/
#define devhup(rs) \
((inb(rs->modem_status_port) & (MS_RLSD|MS_DRLSD)) == MS_DRLSD)
((my_inb(rs->modem_status_port) & (MS_RLSD|MS_DRLSD)) == MS_DRLSD)
#else /* MACHINE == ATARI */
@ -231,7 +226,7 @@ typedef struct rs232 {
unsigned parity_errors;
unsigned break_interrupts;
irq_hook_t hook; /* interrupt hook */
int irq_hook_id; /* interrupt hook */
char ibuf[RS_IBUFSIZE]; /* input buffer */
char obuf[RS_OBUFSIZE]; /* output buffer */
@ -254,7 +249,7 @@ PRIVATE port_t addr_8250[] = {
};
#endif
FORWARD _PROTOTYPE( int rs232_handler, (irq_hook_t *hook) );
FORWARD _PROTOTYPE( int rs232_handler, (message *m) );
FORWARD _PROTOTYPE( void in_int, (rs232_t *rs) );
FORWARD _PROTOTYPE( void line_int, (rs232_t *rs) );
FORWARD _PROTOTYPE( void modem_int, (rs232_t *rs) );
@ -270,6 +265,19 @@ FORWARD _PROTOTYPE( void rs_break, (tty_t *tp) );
FORWARD _PROTOTYPE( void rs_close, (tty_t *tp) );
FORWARD _PROTOTYPE( void out_int, (rs232_t *rs) );
/* XXX */
PRIVATE void lock(void) {}
PRIVATE void unlock(void) {}
PRIVATE int my_inb(port_t port)
{
int r, v = 0;
r = sys_inb(port, &v);
if(r != OK)
printf("RS232 warning: failed inb 0x%x\n", port);
return v;
}
/*==========================================================================*
* rs_write *
@ -281,7 +289,6 @@ register tty_t *tp;
rs232_t *rs = tp->tty_priv;
int count, ocount;
phys_bytes user_phys;
if (rs->inhibited != tp->tty_inhibited) {
/* Inhibition state has changed. */
@ -308,8 +315,8 @@ register tty_t *tp;
if (count == 0 || tp->tty_inhibited) break;
/* Copy from user space to the RS232 output buffer. */
user_phys = proc_vir2phys(proc_addr(tp->tty_outproc), tp->tty_out_vir);
phys_copy(user_phys, vir2phys(rs->ohead), (phys_bytes) count);
sys_vircopy(tp->tty_outproc, D, (vir_bytes) tp->tty_out_vir,
SELF, D, (vir_bytes) rs->ohead, (phys_bytes) count);
/* Perform output processing on the output buffer. */
out_process(tp, rs->obuf, rs->ohead, bufend(rs->obuf), &count, &ocount);
@ -456,12 +463,12 @@ rs232_t *rs; /* which line */
lock();
/* Select the baud rate divisor registers and change the rate. */
outb(rs->line_ctl_port, LC_ADDRESS_DIVISOR);
outb(rs->div_low_port, divisor);
outb(rs->div_hi_port, divisor >> 8);
sys_outb(rs->line_ctl_port, LC_ADDRESS_DIVISOR);
sys_outb(rs->div_low_port, divisor);
sys_outb(rs->div_hi_port, divisor >> 8);
/* Change the line controls and reselect the usual registers. */
outb(rs->line_ctl_port, line_controls);
sys_outb(rs->line_ctl_port, line_controls);
rs->ostate = devready(rs) | ORAW | OSWREADY; /* reads modem_ctl_port */
if ((tp->tty_termios.c_lflag & IXON) && rs->oxoff != _POSIX_VDISABLE)
@ -498,6 +505,7 @@ rs232_t *rs; /* which line */
PUBLIC void rs_init(tp)
tty_t *tp; /* which TTY */
{
int dummy;
/* Initialize RS232 for one line. */
register rs232_t *rs;
@ -547,7 +555,7 @@ tty_t *tp; /* which TTY */
istop(rs); /* sets modem_ctl_port */
rs_config(rs);
#if (MACHINE == IBM_PC)
outb(rs->int_enab_port, 0);
sys_outb(rs->int_enab_port, 0);
#endif
/* Clear any harmful leftover interrupts. An output interrupt is harmless
@ -555,8 +563,8 @@ tty_t *tp; /* which TTY */
* queue using the status from clearing the modem status interrupt.
*/
#if (MACHINE == IBM_PC)
inb(rs->line_status_port);
inb(rs->recv_port);
sys_inb(rs->line_status_port, &dummy);
sys_inb(rs->recv_port, &dummy);
#endif
rs->ostate = devready(rs) | ORAW | OSWREADY; /* reads modem_ctl_port */
rs->ohead = rs->otail = rs->obuf;
@ -565,9 +573,15 @@ tty_t *tp; /* which TTY */
/* Enable interrupts for both interrupt controller and device. */
irq = (line & 1) == 0 ? RS232_IRQ : SECONDARY_IRQ;
put_irq_handler(&rs->hook, irq, rs232_handler);
enable_irq(&rs->hook);
outb(rs->int_enab_port, IE_LINE_STATUS_CHANGE | IE_MODEM_STATUS_CHANGE
if(sys_irqsetpolicy(irq, IRQ_REENABLE, &rs->irq_hook_id) != OK) {
printf("RS232: Couldn't obtain hook for irq %d\n", irq);
} else {
if(sys_irqenable(&rs->irq_hook_id) != OK) {
printf("RS232: Couldn't enable irq %d (hooked)\n", irq);
}
}
sys_outb(rs->int_enab_port, IE_LINE_STATUS_CHANGE | IE_MODEM_STATUS_CHANGE
| IE_RECEIVER_READY | IE_TRANSMITTER_READY);
#else /* MACHINE == ATARI */
/* Initialize the 68901 chip, then enable interrupts. */
@ -696,10 +710,12 @@ tty_t *tp; /* which tty */
rs232_t *rs = tp->tty_priv;
int line_controls;
line_controls = inb(rs->line_ctl_port);
outb(rs->line_ctl_port, line_controls | LC_BREAK);
milli_delay(400); /* ouch */
outb(rs->line_ctl_port, line_controls);
sys_inb(rs->line_ctl_port, &line_controls);
sys_outb(rs->line_ctl_port, line_controls | LC_BREAK);
/* XXX */
/* milli_delay(400); */ /* ouch */
printf("RS232 break\n");
sys_outb(rs->line_ctl_port, line_controls);
}
@ -713,7 +729,7 @@ tty_t *tp; /* which tty */
rs232_t *rs = tp->tty_priv;
if (tp->tty_termios.c_cflag & HUPCL) {
outb(rs->modem_ctl_port, MC_OUT2 | MC_RTS);
sys_outb(rs->modem_ctl_port, MC_OUT2 | MC_RTS);
}
}
@ -724,20 +740,28 @@ tty_t *tp; /* which tty */
/*==========================================================================*
* rs232_handler *
*==========================================================================*/
PRIVATE int rs232_handler(hook)
irq_hook_t *hook;
PRIVATE int rs232_handler(m)
message *m;
{
/* Interrupt hander for RS232. */
/* XXX */
#if DEAD_CODE
register rs232_t *rs = structof(rs232_t, hook, hook);
#else
/* XXX */
register rs232_t *rs = NULL;
#endif
while (TRUE) {
int v;
/* Loop to pick up ALL pending interrupts for device.
* This usually just wastes time unless the hardware has a buffer
* (and then we have to worry about being stuck in the loop too long).
* Unfortunately, some serial cards lock up without this.
*/
switch (inb(rs->int_id_port)) {
sys_inb(rs->int_id_port, &v);
switch (v) {
case IS_RECEIVER_READY:
in_int(rs);
continue;
@ -816,7 +840,7 @@ register rs232_t *rs; /* line with input interrupt */
int c;
#if (MACHINE == IBM_PC)
c = inb(rs->recv_port);
sys_inb(rs->recv_port, &c);
#else /* MACHINE == ATARI */
c = MFP->mf_udr;
#endif
@ -852,7 +876,7 @@ register rs232_t *rs; /* line with line status interrupt */
/* Check for and record errors. */
#if (MACHINE == IBM_PC)
rs->lstatus = inb(rs->line_status_port);
sys_inb(rs->line_status_port, &rs->lstatus);
#else /* MACHINE == ATARI */
rs->lstatus = MFP->mf_rsr;
MFP->mf_rsr &= R_ENA;
@ -910,7 +934,7 @@ register rs232_t *rs; /* line with output interrupt */
if (rs->ostate >= (ODEVREADY | OQUEUED | OSWREADY)) {
/* Bit test allows ORAW and requires the others. */
#if (MACHINE == IBM_PC)
outb(rs->xmit_port, *rs->otail);
sys_outb(rs->xmit_port, *rs->otail);
#else /* MACHINE == ATARI */
MFP->mf_udr = *rs->otail;
#endif

2
include/minix/config.h
View file

@ -3,7 +3,7 @@
/* Minix release and version numbers. */
#define OS_RELEASE "3"
#define OS_VERSION "0.2"
#define OS_VERSION "0.3"
/* This file sets configuration parameters for the MINIX kernel, FS, and PM.
* It is divided up into two main sections. The first section contains