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 pp_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 void qemu_chr_open_pp_fd(Chardev *chr, |
161 | int fd, |
162 | bool *be_opened, |
163 | Error **errp) |
164 | { |
165 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
166 | |
167 | if (ioctl(fd, PPCLAIM) < 0) { |
168 | error_setg_errno(errp, errno, "not a parallel port" ); |
169 | close(fd); |
170 | return; |
171 | } |
172 | |
173 | drv->fd = fd; |
174 | drv->mode = IEEE1284_MODE_COMPAT; |
175 | } |
176 | #endif /* __linux__ */ |
177 | |
178 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
179 | |
180 | typedef struct { |
181 | Chardev parent; |
182 | int fd; |
183 | } ParallelChardev; |
184 | |
185 | #define PARALLEL_CHARDEV(obj) \ |
186 | OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL) |
187 | |
188 | static int pp_ioctl(Chardev *chr, int cmd, void *arg) |
189 | { |
190 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
191 | uint8_t b; |
192 | |
193 | switch (cmd) { |
194 | case CHR_IOCTL_PP_READ_DATA: |
195 | if (ioctl(drv->fd, PPIGDATA, &b) < 0) { |
196 | return -ENOTSUP; |
197 | } |
198 | *(uint8_t *)arg = b; |
199 | break; |
200 | case CHR_IOCTL_PP_WRITE_DATA: |
201 | b = *(uint8_t *)arg; |
202 | if (ioctl(drv->fd, PPISDATA, &b) < 0) { |
203 | return -ENOTSUP; |
204 | } |
205 | break; |
206 | case CHR_IOCTL_PP_READ_CONTROL: |
207 | if (ioctl(drv->fd, PPIGCTRL, &b) < 0) { |
208 | return -ENOTSUP; |
209 | } |
210 | *(uint8_t *)arg = b; |
211 | break; |
212 | case CHR_IOCTL_PP_WRITE_CONTROL: |
213 | b = *(uint8_t *)arg; |
214 | if (ioctl(drv->fd, PPISCTRL, &b) < 0) { |
215 | return -ENOTSUP; |
216 | } |
217 | break; |
218 | case CHR_IOCTL_PP_READ_STATUS: |
219 | if (ioctl(drv->fd, PPIGSTATUS, &b) < 0) { |
220 | return -ENOTSUP; |
221 | } |
222 | *(uint8_t *)arg = b; |
223 | break; |
224 | default: |
225 | return -ENOTSUP; |
226 | } |
227 | return 0; |
228 | } |
229 | |
230 | static void qemu_chr_open_pp_fd(Chardev *chr, |
231 | int fd, |
232 | bool *be_opened, |
233 | Error **errp) |
234 | { |
235 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
236 | drv->fd = fd; |
237 | *be_opened = false; |
238 | } |
239 | #endif |
240 | |
241 | #ifdef HAVE_CHARDEV_PARPORT |
242 | static void qmp_chardev_open_parallel(Chardev *chr, |
243 | ChardevBackend *backend, |
244 | bool *be_opened, |
245 | Error **errp) |
246 | { |
247 | ChardevHostdev *parallel = backend->u.parallel.data; |
248 | int fd; |
249 | |
250 | fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp); |
251 | if (fd < 0) { |
252 | return; |
253 | } |
254 | qemu_chr_open_pp_fd(chr, fd, be_opened, errp); |
255 | } |
256 | |
257 | static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend, |
258 | Error **errp) |
259 | { |
260 | const char *device = qemu_opt_get(opts, "path" ); |
261 | ChardevHostdev *parallel; |
262 | |
263 | if (device == NULL) { |
264 | error_setg(errp, "chardev: parallel: no device path given" ); |
265 | return; |
266 | } |
267 | backend->type = CHARDEV_BACKEND_KIND_PARALLEL; |
268 | parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1); |
269 | qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel)); |
270 | parallel->device = g_strdup(device); |
271 | } |
272 | |
273 | static void char_parallel_class_init(ObjectClass *oc, void *data) |
274 | { |
275 | ChardevClass *cc = CHARDEV_CLASS(oc); |
276 | |
277 | cc->parse = qemu_chr_parse_parallel; |
278 | cc->open = qmp_chardev_open_parallel; |
279 | #if defined(__linux__) |
280 | cc->chr_ioctl = pp_ioctl; |
281 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \ |
282 | defined(__DragonFly__) |
283 | cc->chr_ioctl = pp_ioctl; |
284 | #endif |
285 | } |
286 | |
287 | static void char_parallel_finalize(Object *obj) |
288 | { |
289 | #if defined(__linux__) |
290 | Chardev *chr = CHARDEV(obj); |
291 | ParallelChardev *drv = PARALLEL_CHARDEV(chr); |
292 | int fd = drv->fd; |
293 | |
294 | pp_hw_mode(drv, IEEE1284_MODE_COMPAT); |
295 | ioctl(fd, PPRELEASE); |
296 | close(fd); |
297 | qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
298 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \ |
299 | defined(__DragonFly__) |
300 | /* FIXME: close fd? */ |
301 | #endif |
302 | } |
303 | |
304 | static const TypeInfo char_parallel_type_info = { |
305 | .name = TYPE_CHARDEV_PARALLEL, |
306 | .parent = TYPE_CHARDEV, |
307 | .instance_size = sizeof(ParallelChardev), |
308 | .instance_finalize = char_parallel_finalize, |
309 | .class_init = char_parallel_class_init, |
310 | }; |
311 | |
312 | static void register_types(void) |
313 | { |
314 | type_register_static(&char_parallel_type_info); |
315 | } |
316 | |
317 | type_init(register_types); |
318 | |
319 | #endif |
320 | |