| 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include "qemu/osdep.h" |
| 26 | #include "chardev/char.h" |
| 27 | #include "qapi/error.h" |
| 28 | #include "qemu/module.h" |
| 29 | #include "qemu/option.h" |
| 30 | #include <sys/ioctl.h> |
| 31 | |
| 32 | #ifdef CONFIG_BSD |
| 33 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 34 | #include <dev/ppbus/ppi.h> |
| 35 | #include <dev/ppbus/ppbconf.h> |
| 36 | #elif defined(__DragonFly__) |
| 37 | #include <dev/misc/ppi/ppi.h> |
| 38 | #include <bus/ppbus/ppbconf.h> |
| 39 | #endif |
| 40 | #else |
| 41 | #ifdef __linux__ |
| 42 | #include <linux/ppdev.h> |
| 43 | #include <linux/parport.h> |
| 44 | #endif |
| 45 | #endif |
| 46 | |
| 47 | #include "chardev/char-fd.h" |
| 48 | #include "chardev/char-parallel.h" |
| 49 | |
| 50 | #if defined(__linux__) |
| 51 | |
| 52 | typedef struct { |
| 53 | Chardev parent; |
| 54 | int fd; |
| 55 | int mode; |
| 56 | } ParallelChardev; |
| 57 | |
| 58 | #define PARALLEL_CHARDEV(obj) \ |
| 59 | OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL) |
| 60 | |
| 61 | static int pp_hw_mode(ParallelChardev *s, uint16_t mode) |
| 62 | { |
| 63 | if (s->mode != mode) { |
| 64 | int m = mode; |
| 65 | if (ioctl(s->fd, PPSETMODE, &m) < 0) { |
| 66 | return 0; |
| 67 | } |
| 68 | s->mode = mode; |
| 69 | } |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | static int parallel_chr_ioctl(Chardev *chr, int cmd, void *arg) |
| 74 | { |
| 75 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
| 76 | int fd = drv->fd; |
| 77 | uint8_t b; |
| 78 | |
| 79 | switch (cmd) { |
| 80 | case CHR_IOCTL_PP_READ_DATA: |
| 81 | if (ioctl(fd, PPRDATA, &b) < 0) { |
| 82 | return -ENOTSUP; |
| 83 | } |
| 84 | *(uint8_t *)arg = b; |
| 85 | break; |
| 86 | case CHR_IOCTL_PP_WRITE_DATA: |
| 87 | b = *(uint8_t *)arg; |
| 88 | if (ioctl(fd, PPWDATA, &b) < 0) { |
| 89 | return -ENOTSUP; |
| 90 | } |
| 91 | break; |
| 92 | case CHR_IOCTL_PP_READ_CONTROL: |
| 93 | if (ioctl(fd, PPRCONTROL, &b) < 0) { |
| 94 | return -ENOTSUP; |
| 95 | } |
| 96 | /* Linux gives only the lowest bits, and no way to know data |
| 97 | direction! For better compatibility set the fixed upper |
| 98 | bits. */ |
| 99 | *(uint8_t *)arg = b | 0xc0; |
| 100 | break; |
| 101 | case CHR_IOCTL_PP_WRITE_CONTROL: |
| 102 | b = *(uint8_t *)arg; |
| 103 | if (ioctl(fd, PPWCONTROL, &b) < 0) { |
| 104 | return -ENOTSUP; |
| 105 | } |
| 106 | break; |
| 107 | case CHR_IOCTL_PP_READ_STATUS: |
| 108 | if (ioctl(fd, PPRSTATUS, &b) < 0) { |
| 109 | return -ENOTSUP; |
| 110 | } |
| 111 | *(uint8_t *)arg = b; |
| 112 | break; |
| 113 | case CHR_IOCTL_PP_DATA_DIR: |
| 114 | if (ioctl(fd, PPDATADIR, (int *)arg) < 0) { |
| 115 | return -ENOTSUP; |
| 116 | } |
| 117 | break; |
| 118 | case CHR_IOCTL_PP_EPP_READ_ADDR: |
| 119 | if (pp_hw_mode(drv, IEEE1284_MODE_EPP | IEEE1284_ADDR)) { |
| 120 | struct ParallelIOArg *parg = arg; |
| 121 | int n = read(fd, parg->buffer, parg->count); |
| 122 | if (n != parg->count) { |
| 123 | return -EIO; |
| 124 | } |
| 125 | } |
| 126 | break; |
| 127 | case CHR_IOCTL_PP_EPP_READ: |
| 128 | if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { |
| 129 | struct ParallelIOArg *parg = arg; |
| 130 | int n = read(fd, parg->buffer, parg->count); |
| 131 | if (n != parg->count) { |
| 132 | return -EIO; |
| 133 | } |
| 134 | } |
| 135 | break; |
| 136 | case CHR_IOCTL_PP_EPP_WRITE_ADDR: |
| 137 | if (pp_hw_mode(drv, IEEE1284_MODE_EPP | IEEE1284_ADDR)) { |
| 138 | struct ParallelIOArg *parg = arg; |
| 139 | int n = write(fd, parg->buffer, parg->count); |
| 140 | if (n != parg->count) { |
| 141 | return -EIO; |
| 142 | } |
| 143 | } |
| 144 | break; |
| 145 | case CHR_IOCTL_PP_EPP_WRITE: |
| 146 | if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { |
| 147 | struct ParallelIOArg *parg = arg; |
| 148 | int n = write(fd, parg->buffer, parg->count); |
| 149 | if (n != parg->count) { |
| 150 | return -EIO; |
| 151 | } |
| 152 | } |
| 153 | break; |
| 154 | default: |
| 155 | return -ENOTSUP; |
| 156 | } |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static bool parallel_chr_open_fd(Chardev *chr, int fd, Error **errp) |
| 161 | { |
| 162 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
| 163 | |
| 164 | drv->fd = fd; |
| 165 | |
| 166 | if (ioctl(fd, PPCLAIM) < 0) { |
| 167 | error_setg_errno(errp, errno, "not a parallel port"); |
| 168 | return false; |
| 169 | } |
| 170 | |
| 171 | drv->mode = IEEE1284_MODE_COMPAT; |
| 172 | qemu_chr_be_event(chr, CHR_EVENT_OPENED); |
| 173 | return true; |
| 174 | } |
| 175 | #endif /* __linux__ */ |
| 176 | |
| 177 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
| 178 | |
| 179 | typedef struct { |
| 180 | Chardev parent; |
| 181 | int fd; |
| 182 | } ParallelChardev; |
| 183 | |
| 184 | #define PARALLEL_CHARDEV(obj) \ |
| 185 | OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL) |
| 186 | |
| 187 | static int parallel_chr_ioctl(Chardev *chr, int cmd, void *arg) |
| 188 | { |
| 189 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
| 190 | uint8_t b; |
| 191 | |
| 192 | switch (cmd) { |
| 193 | case CHR_IOCTL_PP_READ_DATA: |
| 194 | if (ioctl(drv->fd, PPIGDATA, &b) < 0) { |
| 195 | return -ENOTSUP; |
| 196 | } |
| 197 | *(uint8_t *)arg = b; |
| 198 | break; |
| 199 | case CHR_IOCTL_PP_WRITE_DATA: |
| 200 | b = *(uint8_t *)arg; |
| 201 | if (ioctl(drv->fd, PPISDATA, &b) < 0) { |
| 202 | return -ENOTSUP; |
| 203 | } |
| 204 | break; |
| 205 | case CHR_IOCTL_PP_READ_CONTROL: |
| 206 | if (ioctl(drv->fd, PPIGCTRL, &b) < 0) { |
| 207 | return -ENOTSUP; |
| 208 | } |
| 209 | *(uint8_t *)arg = b; |
| 210 | break; |
| 211 | case CHR_IOCTL_PP_WRITE_CONTROL: |
| 212 | b = *(uint8_t *)arg; |
| 213 | if (ioctl(drv->fd, PPISCTRL, &b) < 0) { |
| 214 | return -ENOTSUP; |
| 215 | } |
| 216 | break; |
| 217 | case CHR_IOCTL_PP_READ_STATUS: |
| 218 | if (ioctl(drv->fd, PPIGSTATUS, &b) < 0) { |
| 219 | return -ENOTSUP; |
| 220 | } |
| 221 | *(uint8_t *)arg = b; |
| 222 | break; |
| 223 | default: |
| 224 | return -ENOTSUP; |
| 225 | } |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | static bool parallel_chr_open_fd(Chardev *chr, int fd, Error **errp) |
| 230 | { |
| 231 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
| 232 | drv->fd = fd; |
| 233 | return true; |
| 234 | } |
| 235 | #endif |
| 236 | |
| 237 | #ifdef HAVE_CHARDEV_PARALLEL |
| 238 | static bool parallel_chr_open(Chardev *chr, |
| 239 | ChardevBackend *backend, |
| 240 | Error **errp) |
| 241 | { |
| 242 | ChardevHostdev *parallel = backend->u.parallel.data; |
| 243 | int fd; |
| 244 | |
| 245 | fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp); |
| 246 | if (fd < 0) { |
| 247 | return false; |
| 248 | } |
| 249 | return parallel_chr_open_fd(chr, fd, errp); |
| 250 | } |
| 251 | |
| 252 | static void parallel_chr_parse(QemuOpts *opts, ChardevBackend *backend, |
| 253 | Error **errp) |
| 254 | { |
| 255 | const char *device = qemu_opt_get(opts, "path"); |
| 256 | ChardevHostdev *parallel; |
| 257 | |
| 258 | if (device == NULL) { |
| 259 | error_setg(errp, "chardev: parallel: no device path given"); |
| 260 | return; |
| 261 | } |
| 262 | backend->type = CHARDEV_BACKEND_KIND_PARALLEL; |
| 263 | parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1); |
| 264 | qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel)); |
| 265 | parallel->device = g_strdup(device); |
| 266 | } |
| 267 | |
| 268 | static void char_parallel_class_init(ObjectClass *oc, const void *data) |
| 269 | { |
| 270 | ChardevClass *cc = CHARDEV_CLASS(oc); |
| 271 | |
| 272 | cc->chr_parse = parallel_chr_parse; |
| 273 | cc->chr_open = parallel_chr_open; |
| 274 | cc->chr_ioctl = parallel_chr_ioctl; |
| 275 | } |
| 276 | |
| 277 | static void char_parallel_finalize(Object *obj) |
| 278 | { |
| 279 | Chardev *chr = CHARDEV(obj); |
| 280 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
| 281 | int fd = drv->fd; |
| 282 | |
| 283 | #if defined(__linux__) |
| 284 | pp_hw_mode(drv, IEEE1284_MODE_COMPAT); |
| 285 | ioctl(fd, PPRELEASE); |
| 286 | #endif |
| 287 | close(fd); |
| 288 | qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| 289 | } |
| 290 | |
| 291 | static const TypeInfo char_parallel_type_info = { |
| 292 | .name = TYPE_CHARDEV_PARALLEL, |
| 293 | .parent = TYPE_CHARDEV, |
| 294 | .instance_size = sizeof(ParallelChardev), |
| 295 | .instance_finalize = char_parallel_finalize, |
| 296 | .class_init = char_parallel_class_init, |
| 297 | }; |
| 298 | |
| 299 | static void register_types(void) |
| 300 | { |
| 301 | type_register_static(&char_parallel_type_info); |
| 302 | } |
| 303 | |
| 304 | type_init(register_types); |
| 305 | |
| 306 | #endif /* HAVE_CHARDEV_PARALLEL */ |