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d203a7ec RB |
1 | /* |
2 | * indycam.c - Silicon Graphics IndyCam digital camera driver | |
3 | * | |
4 | * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org> | |
5 | * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
d203a7ec RB |
12 | #include <linux/delay.h> |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
495515b3 | 15 | #include <linux/init.h> |
d203a7ec RB |
16 | #include <linux/kernel.h> |
17 | #include <linux/major.h> | |
495515b3 | 18 | #include <linux/module.h> |
d203a7ec RB |
19 | #include <linux/mm.h> |
20 | #include <linux/sched.h> | |
495515b3 | 21 | #include <linux/slab.h> |
d203a7ec RB |
22 | |
23 | #include <linux/videodev.h> | |
24 | /* IndyCam decodes stream of photons into digital image representation ;-) */ | |
25 | #include <linux/video_decoder.h> | |
26 | #include <linux/i2c.h> | |
27 | ||
28 | #include "indycam.h" | |
29 | ||
a637a114 | 30 | #define INDYCAM_MODULE_VERSION "0.0.5" |
d203a7ec RB |
31 | |
32 | MODULE_DESCRIPTION("SGI IndyCam driver"); | |
33 | MODULE_VERSION(INDYCAM_MODULE_VERSION); | |
34 | MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
a637a114 LM |
37 | // #define INDYCAM_DEBUG |
38 | ||
d203a7ec RB |
39 | #ifdef INDYCAM_DEBUG |
40 | #define dprintk(x...) printk("IndyCam: " x); | |
41 | #define indycam_regdump(client) indycam_regdump_debug(client) | |
42 | #else | |
43 | #define dprintk(x...) | |
44 | #define indycam_regdump(client) | |
45 | #endif | |
46 | ||
d203a7ec RB |
47 | struct indycam { |
48 | struct i2c_client *client; | |
a637a114 | 49 | u8 version; |
d203a7ec RB |
50 | }; |
51 | ||
52 | static struct i2c_driver i2c_driver_indycam; | |
53 | ||
a637a114 | 54 | static const u8 initseq[] = { |
d203a7ec | 55 | INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */ |
a637a114 | 56 | INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */ |
d203a7ec RB |
57 | INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */ |
58 | 0x00, /* INDYCAM_BRIGHTNESS (read-only) */ | |
59 | INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */ | |
60 | INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */ | |
61 | INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */ | |
62 | INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */ | |
63 | }; | |
64 | ||
65 | /* IndyCam register handling */ | |
66 | ||
a637a114 | 67 | static int indycam_read_reg(struct i2c_client *client, u8 reg, u8 *value) |
d203a7ec RB |
68 | { |
69 | int ret; | |
70 | ||
a637a114 | 71 | if (reg == INDYCAM_REG_RESET) { |
d203a7ec RB |
72 | dprintk("indycam_read_reg(): " |
73 | "skipping write-only register %d\n", reg); | |
74 | *value = 0; | |
75 | return 0; | |
76 | } | |
77 | ||
78 | ret = i2c_smbus_read_byte_data(client, reg); | |
a637a114 | 79 | |
d203a7ec RB |
80 | if (ret < 0) { |
81 | printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, " | |
82 | "register = 0x%02x\n", reg); | |
83 | return ret; | |
84 | } | |
85 | ||
a637a114 | 86 | *value = (u8)ret; |
d203a7ec RB |
87 | |
88 | return 0; | |
89 | } | |
90 | ||
a637a114 | 91 | static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value) |
d203a7ec RB |
92 | { |
93 | int err; | |
94 | ||
a637a114 LM |
95 | if ((reg == INDYCAM_REG_BRIGHTNESS) |
96 | || (reg == INDYCAM_REG_VERSION)) { | |
d203a7ec RB |
97 | dprintk("indycam_write_reg(): " |
98 | "skipping read-only register %d\n", reg); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | dprintk("Writing Reg %d = 0x%02x\n", reg, value); | |
103 | err = i2c_smbus_write_byte_data(client, reg, value); | |
a637a114 | 104 | |
d203a7ec RB |
105 | if (err) { |
106 | printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, " | |
107 | "register = 0x%02x, value = 0x%02x\n", reg, value); | |
108 | } | |
109 | return err; | |
110 | } | |
111 | ||
a637a114 LM |
112 | static int indycam_write_block(struct i2c_client *client, u8 reg, |
113 | u8 length, u8 *data) | |
d203a7ec | 114 | { |
a637a114 | 115 | int i, err; |
d203a7ec | 116 | |
a637a114 | 117 | for (i = 0; i < length; i++) { |
d203a7ec RB |
118 | err = indycam_write_reg(client, reg + i, data[i]); |
119 | if (err) | |
120 | return err; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | /* Helper functions */ | |
127 | ||
128 | #ifdef INDYCAM_DEBUG | |
129 | static void indycam_regdump_debug(struct i2c_client *client) | |
130 | { | |
131 | int i; | |
a637a114 | 132 | u8 val; |
d203a7ec RB |
133 | |
134 | for (i = 0; i < 9; i++) { | |
135 | indycam_read_reg(client, i, &val); | |
136 | dprintk("Reg %d = 0x%02x\n", i, val); | |
137 | } | |
138 | } | |
139 | #endif | |
140 | ||
a637a114 LM |
141 | static int indycam_get_control(struct i2c_client *client, |
142 | struct indycam_control *ctrl) | |
d203a7ec | 143 | { |
a637a114 LM |
144 | struct indycam *camera = i2c_get_clientdata(client); |
145 | u8 reg; | |
146 | int ret = 0; | |
147 | ||
148 | switch (ctrl->type) { | |
149 | case INDYCAM_CONTROL_AGC: | |
150 | case INDYCAM_CONTROL_AWB: | |
151 | ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®); | |
152 | if (ret) | |
153 | return -EIO; | |
154 | if (ctrl->type == INDYCAM_CONTROL_AGC) | |
155 | ctrl->value = (reg & INDYCAM_CONTROL_AGCENA) | |
156 | ? 1 : 0; | |
157 | else | |
158 | ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL) | |
159 | ? 1 : 0; | |
160 | break; | |
161 | case INDYCAM_CONTROL_SHUTTER: | |
162 | ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, ®); | |
163 | if (ret) | |
164 | return -EIO; | |
165 | ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1); | |
166 | break; | |
167 | case INDYCAM_CONTROL_GAIN: | |
168 | ret = indycam_read_reg(client, INDYCAM_REG_GAIN, ®); | |
169 | if (ret) | |
170 | return -EIO; | |
171 | ctrl->value = (s32)reg; | |
172 | break; | |
173 | case INDYCAM_CONTROL_RED_BALANCE: | |
174 | ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, ®); | |
175 | if (ret) | |
176 | return -EIO; | |
177 | ctrl->value = (s32)reg; | |
178 | break; | |
179 | case INDYCAM_CONTROL_BLUE_BALANCE: | |
180 | ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, ®); | |
181 | if (ret) | |
182 | return -EIO; | |
183 | ctrl->value = (s32)reg; | |
184 | break; | |
185 | case INDYCAM_CONTROL_RED_SATURATION: | |
186 | ret = indycam_read_reg(client, | |
187 | INDYCAM_REG_RED_SATURATION, ®); | |
188 | if (ret) | |
189 | return -EIO; | |
190 | ctrl->value = (s32)reg; | |
191 | break; | |
192 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
193 | ret = indycam_read_reg(client, | |
194 | INDYCAM_REG_BLUE_SATURATION, ®); | |
195 | if (ret) | |
196 | return -EIO; | |
197 | ctrl->value = (s32)reg; | |
198 | break; | |
199 | case INDYCAM_CONTROL_GAMMA: | |
200 | if (camera->version == CAMERA_VERSION_MOOSE) { | |
201 | ret = indycam_read_reg(client, | |
202 | INDYCAM_REG_GAMMA, ®); | |
203 | if (ret) | |
204 | return -EIO; | |
205 | ctrl->value = (s32)reg; | |
206 | } else { | |
207 | ctrl->value = INDYCAM_GAMMA_DEFAULT; | |
208 | } | |
209 | break; | |
210 | default: | |
211 | ret = -EINVAL; | |
212 | } | |
d203a7ec | 213 | |
a637a114 | 214 | return ret; |
d203a7ec RB |
215 | } |
216 | ||
a637a114 LM |
217 | static int indycam_set_control(struct i2c_client *client, |
218 | struct indycam_control *ctrl) | |
d203a7ec | 219 | { |
a637a114 LM |
220 | struct indycam *camera = i2c_get_clientdata(client); |
221 | u8 reg; | |
222 | int ret = 0; | |
223 | ||
224 | switch (ctrl->type) { | |
225 | case INDYCAM_CONTROL_AGC: | |
226 | case INDYCAM_CONTROL_AWB: | |
227 | ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®); | |
228 | if (ret) | |
229 | break; | |
d203a7ec | 230 | |
a637a114 LM |
231 | if (ctrl->type == INDYCAM_CONTROL_AGC) { |
232 | if (ctrl->value) | |
233 | reg |= INDYCAM_CONTROL_AGCENA; | |
234 | else | |
235 | reg &= ~INDYCAM_CONTROL_AGCENA; | |
236 | } else { | |
237 | if (ctrl->value) | |
238 | reg |= INDYCAM_CONTROL_AWBCTL; | |
239 | else | |
240 | reg &= ~INDYCAM_CONTROL_AWBCTL; | |
241 | } | |
242 | ||
243 | ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg); | |
244 | break; | |
245 | case INDYCAM_CONTROL_SHUTTER: | |
246 | reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1); | |
247 | ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg); | |
248 | break; | |
249 | case INDYCAM_CONTROL_GAIN: | |
250 | ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value); | |
251 | break; | |
252 | case INDYCAM_CONTROL_RED_BALANCE: | |
253 | ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE, | |
254 | ctrl->value); | |
255 | break; | |
256 | case INDYCAM_CONTROL_BLUE_BALANCE: | |
257 | ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE, | |
258 | ctrl->value); | |
259 | break; | |
260 | case INDYCAM_CONTROL_RED_SATURATION: | |
261 | ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION, | |
262 | ctrl->value); | |
263 | break; | |
264 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
265 | ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION, | |
266 | ctrl->value); | |
267 | break; | |
268 | case INDYCAM_CONTROL_GAMMA: | |
269 | if (camera->version == CAMERA_VERSION_MOOSE) { | |
270 | ret = indycam_write_reg(client, INDYCAM_REG_GAMMA, | |
271 | ctrl->value); | |
272 | } | |
273 | break; | |
274 | default: | |
275 | ret = -EINVAL; | |
d203a7ec | 276 | } |
d203a7ec | 277 | |
a637a114 | 278 | return ret; |
d203a7ec RB |
279 | } |
280 | ||
281 | /* I2C-interface */ | |
282 | ||
283 | static int indycam_attach(struct i2c_adapter *adap, int addr, int kind) | |
284 | { | |
285 | int err = 0; | |
286 | struct indycam *camera; | |
287 | struct i2c_client *client; | |
288 | ||
289 | printk(KERN_INFO "SGI IndyCam driver version %s\n", | |
290 | INDYCAM_MODULE_VERSION); | |
291 | ||
292 | client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); | |
293 | if (!client) | |
294 | return -ENOMEM; | |
295 | camera = kmalloc(sizeof(struct indycam), GFP_KERNEL); | |
296 | if (!camera) { | |
297 | err = -ENOMEM; | |
298 | goto out_free_client; | |
299 | } | |
300 | ||
301 | memset(client, 0, sizeof(struct i2c_client)); | |
302 | memset(camera, 0, sizeof(struct indycam)); | |
303 | ||
304 | client->addr = addr; | |
305 | client->adapter = adap; | |
306 | client->driver = &i2c_driver_indycam; | |
307 | client->flags = 0; | |
308 | strcpy(client->name, "IndyCam client"); | |
309 | i2c_set_clientdata(client, camera); | |
310 | ||
311 | camera->client = client; | |
312 | ||
313 | err = i2c_attach_client(client); | |
314 | if (err) | |
315 | goto out_free_camera; | |
316 | ||
a637a114 LM |
317 | camera->version = i2c_smbus_read_byte_data(client, |
318 | INDYCAM_REG_VERSION); | |
d203a7ec RB |
319 | if (camera->version != CAMERA_VERSION_INDY && |
320 | camera->version != CAMERA_VERSION_MOOSE) { | |
321 | err = -ENODEV; | |
322 | goto out_detach_client; | |
323 | } | |
324 | printk(KERN_INFO "IndyCam v%d.%d detected\n", | |
325 | INDYCAM_VERSION_MAJOR(camera->version), | |
326 | INDYCAM_VERSION_MINOR(camera->version)); | |
327 | ||
328 | indycam_regdump(client); | |
329 | ||
330 | // initialize | |
a637a114 | 331 | err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq); |
d203a7ec RB |
332 | if (err) { |
333 | printk(KERN_ERR "IndyCam initalization failed\n"); | |
334 | err = -EIO; | |
335 | goto out_detach_client; | |
336 | } | |
337 | ||
338 | indycam_regdump(client); | |
339 | ||
340 | // white balance | |
a637a114 | 341 | err = indycam_write_reg(client, INDYCAM_REG_CONTROL, |
d203a7ec RB |
342 | INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL); |
343 | if (err) { | |
a637a114 | 344 | printk(KERN_ERR "IndyCam: White balancing camera failed\n"); |
d203a7ec RB |
345 | err = -EIO; |
346 | goto out_detach_client; | |
347 | } | |
348 | ||
349 | indycam_regdump(client); | |
350 | ||
351 | printk(KERN_INFO "IndyCam initialized\n"); | |
352 | ||
353 | return 0; | |
354 | ||
355 | out_detach_client: | |
356 | i2c_detach_client(client); | |
357 | out_free_camera: | |
358 | kfree(camera); | |
359 | out_free_client: | |
360 | kfree(client); | |
361 | return err; | |
362 | } | |
363 | ||
364 | static int indycam_probe(struct i2c_adapter *adap) | |
365 | { | |
366 | /* Indy specific crap */ | |
495515b3 | 367 | if (adap->id == I2C_HW_SGI_VINO) |
d203a7ec RB |
368 | return indycam_attach(adap, INDYCAM_ADDR, 0); |
369 | /* Feel free to add probe here :-) */ | |
370 | return -ENODEV; | |
371 | } | |
372 | ||
373 | static int indycam_detach(struct i2c_client *client) | |
374 | { | |
375 | struct indycam *camera = i2c_get_clientdata(client); | |
376 | ||
377 | i2c_detach_client(client); | |
378 | kfree(camera); | |
379 | kfree(client); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | static int indycam_command(struct i2c_client *client, unsigned int cmd, | |
384 | void *arg) | |
385 | { | |
386 | // struct indycam *camera = i2c_get_clientdata(client); | |
387 | ||
388 | /* The old video_decoder interface just isn't enough, | |
389 | * so we'll use some custom commands. */ | |
390 | switch (cmd) { | |
391 | case DECODER_GET_CAPABILITIES: { | |
392 | struct video_decoder_capability *cap = arg; | |
393 | ||
394 | cap->flags = VIDEO_DECODER_NTSC; | |
395 | cap->inputs = 1; | |
396 | cap->outputs = 1; | |
397 | break; | |
398 | } | |
399 | case DECODER_GET_STATUS: { | |
400 | int *iarg = arg; | |
401 | ||
402 | *iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC | | |
403 | DECODER_STATUS_COLOR; | |
404 | break; | |
405 | } | |
406 | case DECODER_SET_NORM: { | |
407 | int *iarg = arg; | |
408 | ||
409 | switch (*iarg) { | |
410 | case VIDEO_MODE_NTSC: | |
411 | break; | |
412 | default: | |
413 | return -EINVAL; | |
414 | } | |
415 | break; | |
416 | } | |
417 | case DECODER_SET_INPUT: { | |
418 | int *iarg = arg; | |
419 | ||
420 | if (*iarg != 0) | |
421 | return -EINVAL; | |
422 | break; | |
423 | } | |
424 | case DECODER_SET_OUTPUT: { | |
425 | int *iarg = arg; | |
426 | ||
427 | if (*iarg != 0) | |
428 | return -EINVAL; | |
429 | break; | |
430 | } | |
431 | case DECODER_ENABLE_OUTPUT: { | |
432 | /* Always enabled */ | |
433 | break; | |
434 | } | |
435 | case DECODER_SET_PICTURE: { | |
436 | // struct video_picture *pic = arg; | |
437 | /* TODO: convert values for indycam_set_controls() */ | |
438 | break; | |
439 | } | |
a637a114 LM |
440 | case DECODER_INDYCAM_GET_CONTROL: { |
441 | return indycam_get_control(client, arg); | |
d203a7ec | 442 | } |
a637a114 LM |
443 | case DECODER_INDYCAM_SET_CONTROL: { |
444 | return indycam_set_control(client, arg); | |
d203a7ec RB |
445 | } |
446 | default: | |
447 | return -EINVAL; | |
448 | } | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static struct i2c_driver i2c_driver_indycam = { | |
454 | .owner = THIS_MODULE, | |
a637a114 LM |
455 | .name = "indycam", |
456 | .id = I2C_DRIVERID_INDYCAM, | |
d203a7ec | 457 | .attach_adapter = indycam_probe, |
a637a114 LM |
458 | .detach_client = indycam_detach, |
459 | .command = indycam_command, | |
d203a7ec RB |
460 | }; |
461 | ||
462 | static int __init indycam_init(void) | |
463 | { | |
464 | return i2c_add_driver(&i2c_driver_indycam); | |
465 | } | |
466 | ||
467 | static void __exit indycam_exit(void) | |
468 | { | |
469 | i2c_del_driver(&i2c_driver_indycam); | |
470 | } | |
471 | ||
472 | module_init(indycam_init); | |
473 | module_exit(indycam_exit); |