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- /*
- * QEMU System Emulator
- *
- * Copyright (c) 2003-2008 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 "qemu/osdep.h"
- #include "chardev/char.h"
- #include "qapi/error.h"
- #include "qemu/module.h"
- #include "qemu/option.h"
- #include <sys/ioctl.h>
- #ifdef CONFIG_BSD
- #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
- #include <dev/ppbus/ppi.h>
- #include <dev/ppbus/ppbconf.h>
- #elif defined(__DragonFly__)
- #include <dev/misc/ppi/ppi.h>
- #include <bus/ppbus/ppbconf.h>
- #endif
- #else
- #ifdef __linux__
- #include <linux/ppdev.h>
- #include <linux/parport.h>
- #endif
- #endif
- #include "chardev/char-fd.h"
- #include "chardev/char-parallel.h"
- #if defined(__linux__)
- typedef struct {
- Chardev parent;
- int fd;
- int mode;
- } ParallelChardev;
- #define PARALLEL_CHARDEV(obj) \
- OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL)
- static int pp_hw_mode(ParallelChardev *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(Chardev *chr, int cmd, void *arg)
- {
- ParallelChardev *drv = PARALLEL_CHARDEV(chr);
- int fd = drv->fd;
- uint8_t b;
- switch (cmd) {
- case CHR_IOCTL_PP_READ_DATA:
- if (ioctl(fd, PPRDATA, &b) < 0) {
- return -ENOTSUP;
- }
- *(uint8_t *)arg = b;
- break;
- case CHR_IOCTL_PP_WRITE_DATA:
- b = *(uint8_t *)arg;
- if (ioctl(fd, PPWDATA, &b) < 0) {
- return -ENOTSUP;
- }
- break;
- case CHR_IOCTL_PP_READ_CONTROL:
- if (ioctl(fd, PPRCONTROL, &b) < 0) {
- return -ENOTSUP;
- }
- /* 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;
- if (ioctl(fd, PPWCONTROL, &b) < 0) {
- return -ENOTSUP;
- }
- break;
- case CHR_IOCTL_PP_READ_STATUS:
- if (ioctl(fd, PPRSTATUS, &b) < 0) {
- return -ENOTSUP;
- }
- *(uint8_t *)arg = b;
- break;
- case CHR_IOCTL_PP_DATA_DIR:
- if (ioctl(fd, PPDATADIR, (int *)arg) < 0) {
- return -ENOTSUP;
- }
- 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 qemu_chr_open_pp_fd(Chardev *chr,
- int fd,
- bool *be_opened,
- Error **errp)
- {
- ParallelChardev *drv = PARALLEL_CHARDEV(chr);
- drv->fd = fd;
- if (ioctl(fd, PPCLAIM) < 0) {
- error_setg_errno(errp, errno, "not a parallel port");
- return;
- }
- drv->mode = IEEE1284_MODE_COMPAT;
- }
- #endif /* __linux__ */
- #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
- typedef struct {
- Chardev parent;
- int fd;
- } ParallelChardev;
- #define PARALLEL_CHARDEV(obj) \
- OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL)
- static int pp_ioctl(Chardev *chr, int cmd, void *arg)
- {
- ParallelChardev *drv = PARALLEL_CHARDEV(chr);
- uint8_t b;
- switch (cmd) {
- case CHR_IOCTL_PP_READ_DATA:
- if (ioctl(drv->fd, PPIGDATA, &b) < 0) {
- return -ENOTSUP;
- }
- *(uint8_t *)arg = b;
- break;
- case CHR_IOCTL_PP_WRITE_DATA:
- b = *(uint8_t *)arg;
- if (ioctl(drv->fd, PPISDATA, &b) < 0) {
- return -ENOTSUP;
- }
- break;
- case CHR_IOCTL_PP_READ_CONTROL:
- if (ioctl(drv->fd, PPIGCTRL, &b) < 0) {
- return -ENOTSUP;
- }
- *(uint8_t *)arg = b;
- break;
- case CHR_IOCTL_PP_WRITE_CONTROL:
- b = *(uint8_t *)arg;
- if (ioctl(drv->fd, PPISCTRL, &b) < 0) {
- return -ENOTSUP;
- }
- break;
- case CHR_IOCTL_PP_READ_STATUS:
- if (ioctl(drv->fd, PPIGSTATUS, &b) < 0) {
- return -ENOTSUP;
- }
- *(uint8_t *)arg = b;
- break;
- default:
- return -ENOTSUP;
- }
- return 0;
- }
- static void qemu_chr_open_pp_fd(Chardev *chr,
- int fd,
- bool *be_opened,
- Error **errp)
- {
- ParallelChardev *drv = PARALLEL_CHARDEV(chr);
- drv->fd = fd;
- *be_opened = false;
- }
- #endif
- #ifdef HAVE_CHARDEV_PARALLEL
- static void qmp_chardev_open_parallel(Chardev *chr,
- ChardevBackend *backend,
- bool *be_opened,
- Error **errp)
- {
- ChardevHostdev *parallel = backend->u.parallel.data;
- int fd;
- fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
- if (fd < 0) {
- return;
- }
- qemu_chr_open_pp_fd(chr, fd, be_opened, errp);
- }
- static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
- Error **errp)
- {
- const char *device = qemu_opt_get(opts, "path");
- ChardevHostdev *parallel;
- if (device == NULL) {
- error_setg(errp, "chardev: parallel: no device path given");
- return;
- }
- backend->type = CHARDEV_BACKEND_KIND_PARALLEL;
- parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1);
- qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel));
- parallel->device = g_strdup(device);
- }
- static void char_parallel_class_init(ObjectClass *oc, void *data)
- {
- ChardevClass *cc = CHARDEV_CLASS(oc);
- cc->parse = qemu_chr_parse_parallel;
- cc->open = qmp_chardev_open_parallel;
- cc->chr_ioctl = pp_ioctl;
- }
- static void char_parallel_finalize(Object *obj)
- {
- Chardev *chr = CHARDEV(obj);
- ParallelChardev *drv = PARALLEL_CHARDEV(chr);
- int fd = drv->fd;
- #if defined(__linux__)
- pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
- ioctl(fd, PPRELEASE);
- #endif
- close(fd);
- qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
- }
- static const TypeInfo char_parallel_type_info = {
- .name = TYPE_CHARDEV_PARALLEL,
- .parent = TYPE_CHARDEV,
- .instance_size = sizeof(ParallelChardev),
- .instance_finalize = char_parallel_finalize,
- .class_init = char_parallel_class_init,
- };
- static void register_types(void)
- {
- type_register_static(&char_parallel_type_info);
- }
- type_init(register_types);
- #endif /* HAVE_CHARDEV_PARALLEL */
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