--- /dev/null
+/*
+ * QEMU Parallel PORT emulation
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+//#define DEBUG_PARALLEL
+
+/*
+ * These are the definitions for the Printer Status Register
+ */
+#define PARA_STS_BUSY 0x80 /* Busy complement */
+#define PARA_STS_ACK 0x40 /* Acknowledge */
+#define PARA_STS_PAPER 0x20 /* Out of paper */
+#define PARA_STS_ONLINE 0x10 /* Online */
+#define PARA_STS_ERROR 0x08 /* Error complement */
+
+/*
+ * These are the definitions for the Printer Control Register
+ */
+#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 */
+
+struct ParallelState {
+ uint8_t data;
+ uint8_t status; /* read only register */
+ uint8_t control;
+ int irq;
+ int irq_pending;
+ CharDriverState *chr;
+};
+
+static void parallel_update_irq(ParallelState *s)
+{
+ if (s->irq_pending)
+ pic_set_irq(s->irq, 1);
+ else
+ pic_set_irq(s->irq, 0);
+}
+
+static void parallel_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ ParallelState *s = opaque;
+
+ addr &= 7;
+#ifdef DEBUG_PARALLEL
+ printf("parallel: write addr=0x%02x val=0x%02x\n", addr, val);
+#endif
+ switch(addr) {
+ case 0:
+ s->data = val;
+ parallel_update_irq(s);
+ break;
+ case 2:
+ 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;
+ break;
+ }
+}
+
+static uint32_t parallel_ioport_read(void *opaque, uint32_t addr)
+{
+ ParallelState *s = opaque;
+ uint32_t ret = 0xff;
+
+ addr &= 7;
+ switch(addr) {
+ case 0:
+ ret = s->data;
+ break;
+ case 1:
+ 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:
+ ret = s->control;
+ break;
+ }
+#ifdef DEBUG_PARALLEL
+ printf("parallel: read addr=0x%02x val=0x%02x\n", addr, ret);
+#endif
+ return ret;
+}
+
+static int parallel_can_receive(ParallelState *s)
+{
+ return 0;
+}
+
+static void parallel_receive_byte(ParallelState *s, int ch)
+{
+}
+
+static void parallel_receive_break(ParallelState *s)
+{
+}
+
+static int parallel_can_receive1(void *opaque)
+{
+ ParallelState *s = opaque;
+ return parallel_can_receive(s);
+}
+
+static void parallel_receive1(void *opaque, const uint8_t *buf, int size)
+{
+ ParallelState *s = opaque;
+ parallel_receive_byte(s, buf[0]);
+}
+
+static void parallel_event(void *opaque, int event)
+{
+ ParallelState *s = opaque;
+}
+
+/* If fd is zero, it means that the parallel device uses the console */
+ParallelState *parallel_init(int base, int irq, CharDriverState *chr)
+{
+ ParallelState *s;
+
+ s = qemu_mallocz(sizeof(ParallelState));
+ if (!s)
+ return NULL;
+ s->irq = irq;
+ s->data = 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;
+
+ register_ioport_write(base, 8, 1, parallel_ioport_write, s);
+ register_ioport_read(base, 8, 1, parallel_ioport_read, s);
+ s->chr = chr;
+ qemu_chr_add_read_handler(chr, parallel_can_receive1, parallel_receive1, s);
+ qemu_chr_add_event_handler(chr, parallel_event);
+ return s;
+}
int full_screen = 0;
TextConsole *vga_console;
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
+CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
/***********************************************************/
/* x86 ISA bus support */
"Debug/Expert options:\n"
"-monitor dev redirect the monitor to char device 'dev'\n"
"-serial dev redirect the serial port to char device 'dev'\n"
+ "-parallel dev redirect the parallel port to char device 'dev'\n"
"-pidfile file Write PID to 'file'\n"
"-S freeze CPU at startup (use 'c' to start execution)\n"
"-s wait gdb connection to port %d\n"
QEMU_OPTION_std_vga,
QEMU_OPTION_monitor,
QEMU_OPTION_serial,
+ QEMU_OPTION_parallel,
QEMU_OPTION_loadvm,
QEMU_OPTION_full_screen,
QEMU_OPTION_pidfile,
{ "std-vga", 0, QEMU_OPTION_std_vga },
{ "monitor", 1, QEMU_OPTION_monitor },
{ "serial", 1, QEMU_OPTION_serial },
+ { "parallel", 1, QEMU_OPTION_parallel },
{ "loadvm", HAS_ARG, QEMU_OPTION_loadvm },
{ "full-screen", 0, QEMU_OPTION_full_screen },
{ "pidfile", HAS_ARG, QEMU_OPTION_pidfile },
char monitor_device[128];
char serial_devices[MAX_SERIAL_PORTS][128];
int serial_device_index;
+ char parallel_devices[MAX_PARALLEL_PORTS][128];
+ int parallel_device_index;
const char *loadvm = NULL;
#if !defined(CONFIG_SOFTMMU)
serial_devices[i][0] = '\0';
serial_device_index = 0;
+ pstrcpy(parallel_devices[0], sizeof(parallel_devices[0]), "vc");
+ for(i = 1; i < MAX_PARALLEL_PORTS; i++)
+ parallel_devices[i][0] = '\0';
+ parallel_device_index = 0;
+
nb_tun_fds = 0;
net_if_type = -1;
nb_nics = 1;
case QEMU_OPTION_nographic:
pstrcpy(monitor_device, sizeof(monitor_device), "stdio");
pstrcpy(serial_devices[0], sizeof(serial_devices[0]), "stdio");
+ pstrcpy(parallel_devices[0], sizeof(parallel_devices[0]), "stdio");
nographic = 1;
break;
case QEMU_OPTION_kernel:
sizeof(serial_devices[0]), optarg);
serial_device_index++;
break;
+ case QEMU_OPTION_parallel:
+ if (parallel_device_index >= MAX_PARALLEL_PORTS) {
+ fprintf(stderr, "qemu: too many parallel ports\n");
+ exit(1);
+ }
+ pstrcpy(parallel_devices[parallel_device_index],
+ sizeof(parallel_devices[0]), optarg);
+ parallel_device_index++;
+ break;
case QEMU_OPTION_loadvm:
loadvm = optarg;
break;
}
}
+ for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
+ if (parallel_devices[i][0] != '\0') {
+ parallel_hds[i] = qemu_chr_open(parallel_devices[i]);
+ if (!parallel_hds[i]) {
+ fprintf(stderr, "qemu: could not open parallel device '%s'\n",
+ parallel_devices[i]);
+ exit(1);
+ }
+ if (!strcmp(parallel_devices[i], "vc"))
+ qemu_chr_printf(parallel_hds[i], "parallel%d console\n", i);
+ }
+ }
+
/* setup cpu signal handlers for MMU / self modifying code handling */
#if !defined(CONFIG_SOFTMMU)
projects / qemu.git / commitdiff