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Parport EPP support for Linux, by Marko Kohtala.

Browse Source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2430 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-02-17 23:44:43 +00:00
parent d5d10bc305
commit 5867c88a82
4 changed files with 438 additions and 86 deletions
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424
hw/parallel.c
View File

@ -2,6 +2,7 @@
* QEMU Parallel PORT emulation
*
* Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2007 Marko Kohtala
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@ -25,6 +26,18 @@
//#define DEBUG_PARALLEL
#ifdef DEBUG_PARALLEL
#define pdebug(fmt, arg...) printf("pp: " fmt, ##arg)
#else
#define pdebug(fmt, arg...) ((void)0)
#endif
#define PARA_REG_DATA 0
#define PARA_REG_STS 1
#define PARA_REG_CTR 2
#define PARA_REG_EPP_ADDR 3
#define PARA_REG_EPP_DATA 4
/*
* These are the definitions for the Printer Status Register
*/
@ -33,24 +46,31 @@
#define PARA_STS_PAPER 0x20 /* Out of paper */
#define PARA_STS_ONLINE 0x10 /* Online */
#define PARA_STS_ERROR 0x08 /* Error complement */
#define PARA_STS_TMOUT 0x01 /* EPP timeout */
/*
* These are the definitions for the Printer Control Register
*/
#define PARA_CTR_DIR 0x20 /* Direction (1=read, 0=write) */
#define PARA_CTR_INTEN 0x10 /* IRQ Enable */
#define PARA_CTR_SELECT 0x08 /* Select In complement */
#define PARA_CTR_INIT 0x04 /* Initialize Printer complement */
#define PARA_CTR_AUTOLF 0x02 /* Auto linefeed complement */
#define PARA_CTR_STROBE 0x01 /* Strobe complement */
#define PARA_CTR_SIGNAL (PARA_CTR_SELECT|PARA_CTR_INIT|PARA_CTR_AUTOLF|PARA_CTR_STROBE)
struct ParallelState {
uint8_t data;
uint8_t status; /* read only register */
uint8_t dataw;
uint8_t datar;
uint8_t status;
uint8_t control;
int irq;
int irq_pending;
CharDriverState *chr;
int hw_driver;
int epp_timeout;
uint32_t last_read_offset; /* For debugging */
};
static void parallel_update_irq(ParallelState *s)
@ -61,96 +81,322 @@ static void parallel_update_irq(ParallelState *s)
pic_set_irq(s->irq, 0);
}
static void parallel_ioport_write(void *opaque, uint32_t addr, uint32_t val)
static void
parallel_ioport_write_sw(void *opaque, uint32_t addr, uint32_t val)
{
ParallelState *s = opaque;
pdebug("write addr=0x%02x val=0x%02x\n", addr, val);
addr &= 7;
#ifdef DEBUG_PARALLEL
printf("parallel: write addr=0x%02x val=0x%02x\n", addr, val);
#endif
switch(addr) {
case 0:
if (s->hw_driver) {
s->data = val;
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_DATA, &s->data);
} else {
s->data = val;
parallel_update_irq(s);
}
case PARA_REG_DATA:
s->dataw = val;
parallel_update_irq(s);
break;
case 2:
if (s->hw_driver) {
s->control = val;
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &s->control);
} else {
if ((val & PARA_CTR_INIT) == 0 ) {
s->status = PARA_STS_BUSY;
s->status |= PARA_STS_ACK;
s->status |= PARA_STS_ONLINE;
s->status |= PARA_STS_ERROR;
}
else if (val & PARA_CTR_SELECT) {
if (val & PARA_CTR_STROBE) {
s->status &= ~PARA_STS_BUSY;
if ((s->control & PARA_CTR_STROBE) == 0)
qemu_chr_write(s->chr, &s->data, 1);
} else {
if (s->control & PARA_CTR_INTEN) {
s->irq_pending = 1;
}
}
}
parallel_update_irq(s);
s->control = val;
}
case PARA_REG_CTR:
if ((val & PARA_CTR_INIT) == 0 ) {
s->status = PARA_STS_BUSY;
s->status |= PARA_STS_ACK;
s->status |= PARA_STS_ONLINE;
s->status |= PARA_STS_ERROR;
}
else if (val & PARA_CTR_SELECT) {
if (val & PARA_CTR_STROBE) {
s->status &= ~PARA_STS_BUSY;
if ((s->control & PARA_CTR_STROBE) == 0)
qemu_chr_write(s->chr, &s->dataw, 1);
} else {
if (s->control & PARA_CTR_INTEN) {
s->irq_pending = 1;
}
}
}
parallel_update_irq(s);
s->control = val;
break;
}
}
static uint32_t parallel_ioport_read(void *opaque, uint32_t addr)
static void parallel_ioport_write_hw(void *opaque, uint32_t addr, uint32_t val)
{
ParallelState *s = opaque;
uint8_t parm = val;
/* Sometimes programs do several writes for timing purposes on old
HW. Take care not to waste time on writes that do nothing. */
s->last_read_offset = ~0U;
addr &= 7;
switch(addr) {
case PARA_REG_DATA:
if (s->dataw == val)
return;
pdebug("wd%02x\n", val);
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_DATA, &parm);
s->dataw = val;
break;
case PARA_REG_STS:
pdebug("ws%02x\n", val);
if (val & PARA_STS_TMOUT)
s->epp_timeout = 0;
break;
case PARA_REG_CTR:
val |= 0xc0;
if (s->control == val)
return;
pdebug("wc%02x\n", val);
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &parm);
s->control = val;
break;
case PARA_REG_EPP_ADDR:
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT)
/* Controls not correct for EPP address cycle, so do nothing */
pdebug("wa%02x s\n", val);
else {
struct ParallelIOArg ioarg = { .buffer = &parm, .count = 1 };
if (qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_WRITE_ADDR, &ioarg)) {
s->epp_timeout = 1;
pdebug("wa%02x t\n", val);
}
else
pdebug("wa%02x\n", val);
}
break;
case PARA_REG_EPP_DATA:
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT)
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("we%02x s\n", val);
else {
struct ParallelIOArg ioarg = { .buffer = &parm, .count = 1 };
if (qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg)) {
s->epp_timeout = 1;
pdebug("we%02x t\n", val);
}
else
pdebug("we%02x\n", val);
}
break;
}
}
static void
parallel_ioport_eppdata_write_hw2(void *opaque, uint32_t addr, uint32_t val)
{
ParallelState *s = opaque;
uint16_t eppdata = cpu_to_le16(val);
int err;
struct ParallelIOArg ioarg = {
.buffer = &eppdata, .count = sizeof(eppdata)
};
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) {
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("we%04x s\n", val);
return;
}
err = qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg);
if (err) {
s->epp_timeout = 1;
pdebug("we%04x t\n", val);
}
else
pdebug("we%04x\n", val);
}
static void
parallel_ioport_eppdata_write_hw4(void *opaque, uint32_t addr, uint32_t val)
{
ParallelState *s = opaque;
uint32_t eppdata = cpu_to_le32(val);
int err;
struct ParallelIOArg ioarg = {
.buffer = &eppdata, .count = sizeof(eppdata)
};
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) {
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("we%08x s\n", val);
return;
}
err = qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_WRITE, &ioarg);
if (err) {
s->epp_timeout = 1;
pdebug("we%08x t\n", val);
}
else
pdebug("we%08x\n", val);
}
static uint32_t parallel_ioport_read_sw(void *opaque, uint32_t addr)
{
ParallelState *s = opaque;
uint32_t ret = 0xff;
addr &= 7;
switch(addr) {
case 0:
if (s->hw_driver) {
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_DATA, &s->data);
}
ret = s->data;
case PARA_REG_DATA:
if (s->control & PARA_CTR_DIR)
ret = s->datar;
else
ret = s->dataw;
break;
case 1:
if (s->hw_driver) {
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_STATUS, &s->status);
ret = s->status;
} else {
ret = s->status;
s->irq_pending = 0;
if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) {
/* XXX Fixme: wait 5 microseconds */
if (s->status & PARA_STS_ACK)
s->status &= ~PARA_STS_ACK;
else {
/* XXX Fixme: wait 5 microseconds */
s->status |= PARA_STS_ACK;
s->status |= PARA_STS_BUSY;
}
}
parallel_update_irq(s);
}
case PARA_REG_STS:
ret = s->status;
s->irq_pending = 0;
if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) {
/* XXX Fixme: wait 5 microseconds */
if (s->status & PARA_STS_ACK)
s->status &= ~PARA_STS_ACK;
else {
/* XXX Fixme: wait 5 microseconds */
s->status |= PARA_STS_ACK;
s->status |= PARA_STS_BUSY;
}
}
parallel_update_irq(s);
break;
case 2:
if (s->hw_driver) {
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_CONTROL, &s->control);
}
case PARA_REG_CTR:
ret = s->control;
break;
}
#ifdef DEBUG_PARALLEL
printf("parallel: read addr=0x%02x val=0x%02x\n", addr, ret);
#endif
pdebug("read addr=0x%02x val=0x%02x\n", addr, ret);
return ret;
}
static uint32_t parallel_ioport_read_hw(void *opaque, uint32_t addr)
{
ParallelState *s = opaque;
uint8_t ret = 0xff;
addr &= 7;
switch(addr) {
case PARA_REG_DATA:
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_DATA, &ret);
if (s->last_read_offset != addr || s->datar != ret)
pdebug("rd%02x\n", ret);
s->datar = ret;
break;
case PARA_REG_STS:
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_STATUS, &ret);
ret &= ~PARA_STS_TMOUT;
if (s->epp_timeout)
ret |= PARA_STS_TMOUT;
if (s->last_read_offset != addr || s->status != ret)
pdebug("rs%02x\n", ret);
s->status = ret;
break;
case PARA_REG_CTR:
/* s->control has some bits fixed to 1. It is zero only when
it has not been yet written to. */
if (s->control == 0) {
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_CONTROL, &ret);
if (s->last_read_offset != addr)
pdebug("rc%02x\n", ret);
s->control = ret;
}
else {
ret = s->control;
if (s->last_read_offset != addr)
pdebug("rc%02x\n", ret);
}
break;
case PARA_REG_EPP_ADDR:
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT))
/* Controls not correct for EPP addr cycle, so do nothing */
pdebug("ra%02x s\n", ret);
else {
struct ParallelIOArg ioarg = { .buffer = &ret, .count = 1 };
if (qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_READ_ADDR, &ioarg)) {
s->epp_timeout = 1;
pdebug("ra%02x t\n", ret);
}
else
pdebug("ra%02x\n", ret);
}
break;
case PARA_REG_EPP_DATA:
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT))
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("re%02x s\n", ret);
else {
struct ParallelIOArg ioarg = { .buffer = &ret, .count = 1 };
if (qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg)) {
s->epp_timeout = 1;
pdebug("re%02x t\n", ret);
}
else
pdebug("re%02x\n", ret);
}
break;
}
s->last_read_offset = addr;
return ret;
}
static uint32_t
parallel_ioport_eppdata_read_hw2(void *opaque, uint32_t addr)
{
ParallelState *s = opaque;
uint32_t ret;
uint16_t eppdata = ~0;
int err;
struct ParallelIOArg ioarg = {
.buffer = &eppdata, .count = sizeof(eppdata)
};
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT)) {
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("re%04x s\n", eppdata);
return eppdata;
}
err = qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg);
ret = le16_to_cpu(eppdata);
if (err) {
s->epp_timeout = 1;
pdebug("re%04x t\n", ret);
}
else
pdebug("re%04x\n", ret);
return ret;
}
static uint32_t
parallel_ioport_eppdata_read_hw4(void *opaque, uint32_t addr)
{
ParallelState *s = opaque;
uint32_t ret;
uint32_t eppdata = ~0U;
int err;
struct ParallelIOArg ioarg = {
.buffer = &eppdata, .count = sizeof(eppdata)
};
if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != (PARA_CTR_DIR|PARA_CTR_INIT)) {
/* Controls not correct for EPP data cycle, so do nothing */
pdebug("re%08x s\n", eppdata);
return eppdata;
}
err = qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_EPP_READ, &ioarg);
ret = le32_to_cpu(eppdata);
if (err) {
s->epp_timeout = 1;
pdebug("re%08x t\n", ret);
}
else
pdebug("re%08x\n", ret);
return ret;
}
static void parallel_ioport_ecp_write(void *opaque, uint32_t addr, uint32_t val)
{
addr &= 7;
pdebug("wecp%d=%02x\n", addr, val);
}
static uint32_t parallel_ioport_ecp_read(void *opaque, uint32_t addr)
{
uint8_t ret = 0xff;
addr &= 7;
pdebug("recp%d:%02x\n", addr, ret);
return ret;
}
@ -163,21 +409,39 @@ ParallelState *parallel_init(int base, int irq, CharDriverState *chr)
s = qemu_mallocz(sizeof(ParallelState));
if (!s)
return NULL;
s->chr = chr;
s->hw_driver = 0;
if (qemu_chr_ioctl(chr, CHR_IOCTL_PP_READ_STATUS, &dummy) == 0)
s->hw_driver = 1;
s->irq = irq;
s->data = 0;
s->datar = ~0;
s->dataw = ~0;
s->status = PARA_STS_BUSY;
s->status |= PARA_STS_ACK;
s->status |= PARA_STS_ONLINE;
s->status |= PARA_STS_ERROR;
s->control = PARA_CTR_SELECT;
s->control |= PARA_CTR_INIT;
s->irq = irq;
s->irq_pending = 0;
s->chr = chr;
s->hw_driver = 0;
s->epp_timeout = 0;
s->last_read_offset = ~0U;
register_ioport_write(base, 8, 1, parallel_ioport_write, s);
register_ioport_read(base, 8, 1, parallel_ioport_read, s);
if (qemu_chr_ioctl(chr, CHR_IOCTL_PP_READ_STATUS, &dummy) == 0) {
s->hw_driver = 1;
s->status = dummy;
}
if (s->hw_driver) {
register_ioport_write(base, 8, 1, parallel_ioport_write_hw, s);
register_ioport_read(base, 8, 1, parallel_ioport_read_hw, s);
register_ioport_write(base+4, 1, 2, parallel_ioport_eppdata_write_hw2, s);
register_ioport_read(base+4, 1, 2, parallel_ioport_eppdata_read_hw2, s);
register_ioport_write(base+4, 1, 4, parallel_ioport_eppdata_write_hw4, s);
register_ioport_read(base+4, 1, 4, parallel_ioport_eppdata_read_hw4, s);
register_ioport_write(base+0x400, 8, 1, parallel_ioport_ecp_write, s);
register_ioport_read(base+0x400, 8, 1, parallel_ioport_ecp_read, s);
}
else {
register_ioport_write(base, 8, 1, parallel_ioport_write_sw, s);
register_ioport_read(base, 8, 1, parallel_ioport_read_sw, s);
}
return s;
}

2
qemu-doc.texi
View File

@ -541,7 +541,7 @@ void device
parameters are set according to the emulated ones.
@item /dev/parportN
[Linux only, parallel port only] Use host parallel port
@var{N}. Currently only SPP parallel port features can be used.
@var{N}. Currently SPP and EPP parallel port features can be used.
@item file:filename
Write output to filename. No character can be read.
@item stdio

89
vl.c
View File

@ -55,6 +55,7 @@
#include <malloc.h>
#include <linux/rtc.h>
#include <linux/ppdev.h>
#include <linux/parport.h>
#else
#include <sys/stat.h>
#include <sys/ethernet.h>
@ -1813,9 +1814,26 @@ static CharDriverState *qemu_chr_open_tty(const char *filename)
return chr;
}
typedef struct {
int fd;
int mode;
} ParallelCharDriver;
static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
{
if (s->mode != mode) {
int m = mode;
if (ioctl(s->fd, PPSETMODE, &m) < 0)
return 0;
s->mode = mode;
}
return 1;
}
static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
{
int fd = (int)chr->opaque;
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
uint8_t b;
switch(cmd) {
@ -1832,7 +1850,10 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
case CHR_IOCTL_PP_READ_CONTROL:
if (ioctl(fd, PPRCONTROL, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
/* Linux gives only the lowest bits, and no way to know data
direction! For better compatibility set the fixed upper
bits. */
*(uint8_t *)arg = b | 0xc0;
break;
case CHR_IOCTL_PP_WRITE_CONTROL:
b = *(uint8_t *)arg;
@ -1844,15 +1865,63 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_EPP_READ_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_READ:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static void pp_close(CharDriverState *chr)
{
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
ioctl(fd, PPRELEASE);
close(fd);
qemu_free(drv);
}
static CharDriverState *qemu_chr_open_pp(const char *filename)
{
CharDriverState *chr;
ParallelCharDriver *drv;
int fd;
fd = open(filename, O_RDWR);
@ -1864,14 +1933,24 @@ static CharDriverState *qemu_chr_open_pp(const char *filename)
return NULL;
}
chr = qemu_mallocz(sizeof(CharDriverState));
if (!chr) {
drv = qemu_mallocz(sizeof(ParallelCharDriver));
if (!drv) {
close(fd);
return NULL;
}
drv->fd = fd;
drv->mode = IEEE1284_MODE_COMPAT;
chr = qemu_mallocz(sizeof(CharDriverState));
if (!chr) {
qemu_free(drv);
close(fd);
return NULL;
}
chr->opaque = (void *)fd;
chr->chr_write = null_chr_write;
chr->chr_ioctl = pp_ioctl;
chr->chr_close = pp_close;
chr->opaque = drv;
qemu_chr_reset(chr);

9
vl.h
View File

@ -285,6 +285,10 @@ typedef struct {
#define CHR_IOCTL_PP_READ_CONTROL 5
#define CHR_IOCTL_PP_WRITE_CONTROL 6
#define CHR_IOCTL_PP_READ_STATUS 7
#define CHR_IOCTL_PP_EPP_READ_ADDR 8
#define CHR_IOCTL_PP_EPP_READ 9
#define CHR_IOCTL_PP_EPP_WRITE_ADDR 10
#define CHR_IOCTL_PP_EPP_WRITE 11
typedef void IOEventHandler(void *opaque, int event);
@ -349,6 +353,11 @@ extern CharDriverState *serial_hds[MAX_SERIAL_PORTS];
extern CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
struct ParallelIOArg {
void *buffer;
int count;
};
/* VLANs support */
typedef struct VLANClientState VLANClientState;