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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 | 19 | #include <linux/mm.h> |
495515b3 | 20 | #include <linux/slab.h> |
d203a7ec | 21 | |
d203a7ec | 22 | /* IndyCam decodes stream of photons into digital image representation ;-) */ |
cf4e9484 | 23 | #include <linux/videodev2.h> |
d203a7ec | 24 | #include <linux/i2c.h> |
2b80a191 HV |
25 | #include <media/v4l2-device.h> |
26 | #include <media/v4l2-chip-ident.h> | |
d203a7ec RB |
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 | ||
cf4e9484 | 37 | |
a637a114 LM |
38 | // #define INDYCAM_DEBUG |
39 | ||
d203a7ec RB |
40 | #ifdef INDYCAM_DEBUG |
41 | #define dprintk(x...) printk("IndyCam: " x); | |
42 | #define indycam_regdump(client) indycam_regdump_debug(client) | |
43 | #else | |
44 | #define dprintk(x...) | |
45 | #define indycam_regdump(client) | |
46 | #endif | |
47 | ||
d203a7ec | 48 | struct indycam { |
2b80a191 | 49 | struct v4l2_subdev sd; |
a637a114 | 50 | u8 version; |
d203a7ec RB |
51 | }; |
52 | ||
2b80a191 HV |
53 | static inline struct indycam *to_indycam(struct v4l2_subdev *sd) |
54 | { | |
55 | return container_of(sd, struct indycam, sd); | |
56 | } | |
57 | ||
a637a114 | 58 | static const u8 initseq[] = { |
d203a7ec | 59 | INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */ |
a637a114 | 60 | INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */ |
d203a7ec RB |
61 | INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */ |
62 | 0x00, /* INDYCAM_BRIGHTNESS (read-only) */ | |
63 | INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */ | |
64 | INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */ | |
65 | INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */ | |
66 | INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */ | |
67 | }; | |
68 | ||
69 | /* IndyCam register handling */ | |
70 | ||
2b80a191 | 71 | static int indycam_read_reg(struct v4l2_subdev *sd, u8 reg, u8 *value) |
d203a7ec | 72 | { |
2b80a191 | 73 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
d203a7ec RB |
74 | int ret; |
75 | ||
a637a114 | 76 | if (reg == INDYCAM_REG_RESET) { |
d203a7ec RB |
77 | dprintk("indycam_read_reg(): " |
78 | "skipping write-only register %d\n", reg); | |
79 | *value = 0; | |
80 | return 0; | |
81 | } | |
82 | ||
83 | ret = i2c_smbus_read_byte_data(client, reg); | |
a637a114 | 84 | |
d203a7ec RB |
85 | if (ret < 0) { |
86 | printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, " | |
87 | "register = 0x%02x\n", reg); | |
88 | return ret; | |
89 | } | |
90 | ||
a637a114 | 91 | *value = (u8)ret; |
d203a7ec RB |
92 | |
93 | return 0; | |
94 | } | |
95 | ||
2b80a191 | 96 | static int indycam_write_reg(struct v4l2_subdev *sd, u8 reg, u8 value) |
d203a7ec | 97 | { |
2b80a191 | 98 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
d203a7ec RB |
99 | int err; |
100 | ||
2b80a191 | 101 | if (reg == INDYCAM_REG_BRIGHTNESS || reg == INDYCAM_REG_VERSION) { |
d203a7ec RB |
102 | dprintk("indycam_write_reg(): " |
103 | "skipping read-only register %d\n", reg); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | dprintk("Writing Reg %d = 0x%02x\n", reg, value); | |
108 | err = i2c_smbus_write_byte_data(client, reg, value); | |
a637a114 | 109 | |
d203a7ec RB |
110 | if (err) { |
111 | printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, " | |
112 | "register = 0x%02x, value = 0x%02x\n", reg, value); | |
113 | } | |
114 | return err; | |
115 | } | |
116 | ||
2b80a191 | 117 | static int indycam_write_block(struct v4l2_subdev *sd, u8 reg, |
a637a114 | 118 | u8 length, u8 *data) |
d203a7ec | 119 | { |
a637a114 | 120 | int i, err; |
d203a7ec | 121 | |
a637a114 | 122 | for (i = 0; i < length; i++) { |
2b80a191 | 123 | err = indycam_write_reg(sd, reg + i, data[i]); |
d203a7ec RB |
124 | if (err) |
125 | return err; | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | /* Helper functions */ | |
132 | ||
133 | #ifdef INDYCAM_DEBUG | |
2b80a191 | 134 | static void indycam_regdump_debug(struct v4l2_subdev *sd) |
d203a7ec RB |
135 | { |
136 | int i; | |
a637a114 | 137 | u8 val; |
d203a7ec RB |
138 | |
139 | for (i = 0; i < 9; i++) { | |
2b80a191 | 140 | indycam_read_reg(sd, i, &val); |
d203a7ec RB |
141 | dprintk("Reg %d = 0x%02x\n", i, val); |
142 | } | |
143 | } | |
144 | #endif | |
145 | ||
2b80a191 | 146 | static int indycam_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
d203a7ec | 147 | { |
2b80a191 | 148 | struct indycam *camera = to_indycam(sd); |
a637a114 LM |
149 | u8 reg; |
150 | int ret = 0; | |
151 | ||
cf4e9484 HV |
152 | switch (ctrl->id) { |
153 | case V4L2_CID_AUTOGAIN: | |
154 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
2b80a191 | 155 | ret = indycam_read_reg(sd, INDYCAM_REG_CONTROL, ®); |
a637a114 LM |
156 | if (ret) |
157 | return -EIO; | |
cf4e9484 | 158 | if (ctrl->id == V4L2_CID_AUTOGAIN) |
a637a114 LM |
159 | ctrl->value = (reg & INDYCAM_CONTROL_AGCENA) |
160 | ? 1 : 0; | |
161 | else | |
162 | ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL) | |
163 | ? 1 : 0; | |
164 | break; | |
cf4e9484 | 165 | case V4L2_CID_EXPOSURE: |
2b80a191 | 166 | ret = indycam_read_reg(sd, INDYCAM_REG_SHUTTER, ®); |
a637a114 LM |
167 | if (ret) |
168 | return -EIO; | |
169 | ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1); | |
170 | break; | |
cf4e9484 | 171 | case V4L2_CID_GAIN: |
2b80a191 | 172 | ret = indycam_read_reg(sd, INDYCAM_REG_GAIN, ®); |
a637a114 LM |
173 | if (ret) |
174 | return -EIO; | |
175 | ctrl->value = (s32)reg; | |
176 | break; | |
cf4e9484 | 177 | case V4L2_CID_RED_BALANCE: |
2b80a191 | 178 | ret = indycam_read_reg(sd, INDYCAM_REG_RED_BALANCE, ®); |
a637a114 LM |
179 | if (ret) |
180 | return -EIO; | |
181 | ctrl->value = (s32)reg; | |
182 | break; | |
cf4e9484 | 183 | case V4L2_CID_BLUE_BALANCE: |
2b80a191 | 184 | ret = indycam_read_reg(sd, INDYCAM_REG_BLUE_BALANCE, ®); |
a637a114 LM |
185 | if (ret) |
186 | return -EIO; | |
187 | ctrl->value = (s32)reg; | |
188 | break; | |
189 | case INDYCAM_CONTROL_RED_SATURATION: | |
2b80a191 | 190 | ret = indycam_read_reg(sd, |
a637a114 LM |
191 | INDYCAM_REG_RED_SATURATION, ®); |
192 | if (ret) | |
193 | return -EIO; | |
194 | ctrl->value = (s32)reg; | |
195 | break; | |
196 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
2b80a191 | 197 | ret = indycam_read_reg(sd, |
a637a114 LM |
198 | INDYCAM_REG_BLUE_SATURATION, ®); |
199 | if (ret) | |
200 | return -EIO; | |
201 | ctrl->value = (s32)reg; | |
202 | break; | |
cf4e9484 | 203 | case V4L2_CID_GAMMA: |
a637a114 | 204 | if (camera->version == CAMERA_VERSION_MOOSE) { |
2b80a191 | 205 | ret = indycam_read_reg(sd, |
a637a114 LM |
206 | INDYCAM_REG_GAMMA, ®); |
207 | if (ret) | |
208 | return -EIO; | |
209 | ctrl->value = (s32)reg; | |
210 | } else { | |
211 | ctrl->value = INDYCAM_GAMMA_DEFAULT; | |
212 | } | |
213 | break; | |
214 | default: | |
215 | ret = -EINVAL; | |
216 | } | |
d203a7ec | 217 | |
a637a114 | 218 | return ret; |
d203a7ec RB |
219 | } |
220 | ||
2b80a191 | 221 | static int indycam_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
d203a7ec | 222 | { |
2b80a191 | 223 | struct indycam *camera = to_indycam(sd); |
a637a114 LM |
224 | u8 reg; |
225 | int ret = 0; | |
226 | ||
cf4e9484 HV |
227 | switch (ctrl->id) { |
228 | case V4L2_CID_AUTOGAIN: | |
229 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
2b80a191 | 230 | ret = indycam_read_reg(sd, INDYCAM_REG_CONTROL, ®); |
a637a114 LM |
231 | if (ret) |
232 | break; | |
d203a7ec | 233 | |
cf4e9484 | 234 | if (ctrl->id == V4L2_CID_AUTOGAIN) { |
a637a114 LM |
235 | if (ctrl->value) |
236 | reg |= INDYCAM_CONTROL_AGCENA; | |
237 | else | |
238 | reg &= ~INDYCAM_CONTROL_AGCENA; | |
239 | } else { | |
240 | if (ctrl->value) | |
241 | reg |= INDYCAM_CONTROL_AWBCTL; | |
242 | else | |
243 | reg &= ~INDYCAM_CONTROL_AWBCTL; | |
244 | } | |
245 | ||
2b80a191 | 246 | ret = indycam_write_reg(sd, INDYCAM_REG_CONTROL, reg); |
a637a114 | 247 | break; |
cf4e9484 | 248 | case V4L2_CID_EXPOSURE: |
a637a114 | 249 | reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1); |
2b80a191 | 250 | ret = indycam_write_reg(sd, INDYCAM_REG_SHUTTER, reg); |
a637a114 | 251 | break; |
cf4e9484 | 252 | case V4L2_CID_GAIN: |
2b80a191 | 253 | ret = indycam_write_reg(sd, INDYCAM_REG_GAIN, ctrl->value); |
a637a114 | 254 | break; |
cf4e9484 | 255 | case V4L2_CID_RED_BALANCE: |
2b80a191 | 256 | ret = indycam_write_reg(sd, INDYCAM_REG_RED_BALANCE, |
a637a114 LM |
257 | ctrl->value); |
258 | break; | |
cf4e9484 | 259 | case V4L2_CID_BLUE_BALANCE: |
2b80a191 | 260 | ret = indycam_write_reg(sd, INDYCAM_REG_BLUE_BALANCE, |
a637a114 LM |
261 | ctrl->value); |
262 | break; | |
263 | case INDYCAM_CONTROL_RED_SATURATION: | |
2b80a191 | 264 | ret = indycam_write_reg(sd, INDYCAM_REG_RED_SATURATION, |
a637a114 LM |
265 | ctrl->value); |
266 | break; | |
267 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
2b80a191 | 268 | ret = indycam_write_reg(sd, INDYCAM_REG_BLUE_SATURATION, |
a637a114 LM |
269 | ctrl->value); |
270 | break; | |
cf4e9484 | 271 | case V4L2_CID_GAMMA: |
a637a114 | 272 | if (camera->version == CAMERA_VERSION_MOOSE) { |
2b80a191 | 273 | ret = indycam_write_reg(sd, INDYCAM_REG_GAMMA, |
a637a114 LM |
274 | ctrl->value); |
275 | } | |
276 | break; | |
277 | default: | |
278 | ret = -EINVAL; | |
d203a7ec | 279 | } |
d203a7ec | 280 | |
a637a114 | 281 | return ret; |
d203a7ec RB |
282 | } |
283 | ||
284 | /* I2C-interface */ | |
285 | ||
2b80a191 HV |
286 | static int indycam_g_chip_ident(struct v4l2_subdev *sd, |
287 | struct v4l2_dbg_chip_ident *chip) | |
cf4e9484 | 288 | { |
2b80a191 HV |
289 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
290 | struct indycam *camera = to_indycam(sd); | |
cf4e9484 | 291 | |
2b80a191 HV |
292 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_INDYCAM, |
293 | camera->version); | |
294 | } | |
cf4e9484 | 295 | |
2b80a191 HV |
296 | /* ----------------------------------------------------------------------- */ |
297 | ||
298 | static const struct v4l2_subdev_core_ops indycam_core_ops = { | |
299 | .g_chip_ident = indycam_g_chip_ident, | |
300 | .g_ctrl = indycam_g_ctrl, | |
301 | .s_ctrl = indycam_s_ctrl, | |
302 | }; | |
303 | ||
304 | static const struct v4l2_subdev_ops indycam_ops = { | |
305 | .core = &indycam_core_ops, | |
306 | }; | |
307 | ||
cf4e9484 HV |
308 | static int indycam_probe(struct i2c_client *client, |
309 | const struct i2c_device_id *id) | |
d203a7ec RB |
310 | { |
311 | int err = 0; | |
312 | struct indycam *camera; | |
2b80a191 | 313 | struct v4l2_subdev *sd; |
d203a7ec | 314 | |
cf4e9484 HV |
315 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
316 | client->addr << 1, client->adapter->name); | |
d203a7ec | 317 | |
7408187d | 318 | camera = kzalloc(sizeof(struct indycam), GFP_KERNEL); |
cf4e9484 HV |
319 | if (!camera) |
320 | return -ENOMEM; | |
d203a7ec | 321 | |
2b80a191 HV |
322 | sd = &camera->sd; |
323 | v4l2_i2c_subdev_init(sd, client, &indycam_ops); | |
d203a7ec | 324 | |
a637a114 LM |
325 | camera->version = i2c_smbus_read_byte_data(client, |
326 | INDYCAM_REG_VERSION); | |
d203a7ec RB |
327 | if (camera->version != CAMERA_VERSION_INDY && |
328 | camera->version != CAMERA_VERSION_MOOSE) { | |
cf4e9484 HV |
329 | kfree(camera); |
330 | return -ENODEV; | |
d203a7ec | 331 | } |
cf4e9484 | 332 | |
d203a7ec RB |
333 | printk(KERN_INFO "IndyCam v%d.%d detected\n", |
334 | INDYCAM_VERSION_MAJOR(camera->version), | |
335 | INDYCAM_VERSION_MINOR(camera->version)); | |
336 | ||
2b80a191 | 337 | indycam_regdump(sd); |
d203a7ec RB |
338 | |
339 | // initialize | |
2b80a191 | 340 | err = indycam_write_block(sd, 0, sizeof(initseq), (u8 *)&initseq); |
d203a7ec | 341 | if (err) { |
c84e6036 | 342 | printk(KERN_ERR "IndyCam initialization failed\n"); |
cf4e9484 HV |
343 | kfree(camera); |
344 | return -EIO; | |
d203a7ec RB |
345 | } |
346 | ||
2b80a191 | 347 | indycam_regdump(sd); |
d203a7ec RB |
348 | |
349 | // white balance | |
2b80a191 | 350 | err = indycam_write_reg(sd, INDYCAM_REG_CONTROL, |
d203a7ec RB |
351 | INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL); |
352 | if (err) { | |
a637a114 | 353 | printk(KERN_ERR "IndyCam: White balancing camera failed\n"); |
cf4e9484 HV |
354 | kfree(camera); |
355 | return -EIO; | |
d203a7ec RB |
356 | } |
357 | ||
2b80a191 | 358 | indycam_regdump(sd); |
d203a7ec RB |
359 | |
360 | printk(KERN_INFO "IndyCam initialized\n"); | |
361 | ||
362 | return 0; | |
d203a7ec RB |
363 | } |
364 | ||
cf4e9484 | 365 | static int indycam_remove(struct i2c_client *client) |
d203a7ec | 366 | { |
2b80a191 | 367 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
d203a7ec | 368 | |
2b80a191 HV |
369 | v4l2_device_unregister_subdev(sd); |
370 | kfree(to_indycam(sd)); | |
d203a7ec RB |
371 | return 0; |
372 | } | |
373 | ||
cf4e9484 HV |
374 | static const struct i2c_device_id indycam_id[] = { |
375 | { "indycam", 0 }, | |
376 | { } | |
377 | }; | |
378 | MODULE_DEVICE_TABLE(i2c, indycam_id); | |
379 | ||
9f490cd6 HV |
380 | static struct i2c_driver indycam_driver = { |
381 | .driver = { | |
382 | .owner = THIS_MODULE, | |
383 | .name = "indycam", | |
384 | }, | |
385 | .probe = indycam_probe, | |
386 | .remove = indycam_remove, | |
387 | .id_table = indycam_id, | |
d203a7ec | 388 | }; |
9f490cd6 | 389 | |
c6e8d86f | 390 | module_i2c_driver(indycam_driver); |