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Commit | Line | Data |
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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> | |
a0720d3b | 27 | #include <media/v4l2-i2c-drv.h> |
d203a7ec RB |
28 | |
29 | #include "indycam.h" | |
30 | ||
a637a114 | 31 | #define INDYCAM_MODULE_VERSION "0.0.5" |
d203a7ec RB |
32 | |
33 | MODULE_DESCRIPTION("SGI IndyCam driver"); | |
34 | MODULE_VERSION(INDYCAM_MODULE_VERSION); | |
35 | MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
cf4e9484 | 38 | |
a637a114 LM |
39 | // #define INDYCAM_DEBUG |
40 | ||
d203a7ec RB |
41 | #ifdef INDYCAM_DEBUG |
42 | #define dprintk(x...) printk("IndyCam: " x); | |
43 | #define indycam_regdump(client) indycam_regdump_debug(client) | |
44 | #else | |
45 | #define dprintk(x...) | |
46 | #define indycam_regdump(client) | |
47 | #endif | |
48 | ||
d203a7ec | 49 | struct indycam { |
2b80a191 | 50 | struct v4l2_subdev sd; |
a637a114 | 51 | u8 version; |
d203a7ec RB |
52 | }; |
53 | ||
2b80a191 HV |
54 | static inline struct indycam *to_indycam(struct v4l2_subdev *sd) |
55 | { | |
56 | return container_of(sd, struct indycam, sd); | |
57 | } | |
58 | ||
a637a114 | 59 | static const u8 initseq[] = { |
d203a7ec | 60 | INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */ |
a637a114 | 61 | INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */ |
d203a7ec RB |
62 | INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */ |
63 | 0x00, /* INDYCAM_BRIGHTNESS (read-only) */ | |
64 | INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */ | |
65 | INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */ | |
66 | INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */ | |
67 | INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */ | |
68 | }; | |
69 | ||
70 | /* IndyCam register handling */ | |
71 | ||
2b80a191 | 72 | static int indycam_read_reg(struct v4l2_subdev *sd, u8 reg, u8 *value) |
d203a7ec | 73 | { |
2b80a191 | 74 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
d203a7ec RB |
75 | int ret; |
76 | ||
a637a114 | 77 | if (reg == INDYCAM_REG_RESET) { |
d203a7ec RB |
78 | dprintk("indycam_read_reg(): " |
79 | "skipping write-only register %d\n", reg); | |
80 | *value = 0; | |
81 | return 0; | |
82 | } | |
83 | ||
84 | ret = i2c_smbus_read_byte_data(client, reg); | |
a637a114 | 85 | |
d203a7ec RB |
86 | if (ret < 0) { |
87 | printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, " | |
88 | "register = 0x%02x\n", reg); | |
89 | return ret; | |
90 | } | |
91 | ||
a637a114 | 92 | *value = (u8)ret; |
d203a7ec RB |
93 | |
94 | return 0; | |
95 | } | |
96 | ||
2b80a191 | 97 | static int indycam_write_reg(struct v4l2_subdev *sd, u8 reg, u8 value) |
d203a7ec | 98 | { |
2b80a191 | 99 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
d203a7ec RB |
100 | int err; |
101 | ||
2b80a191 | 102 | if (reg == INDYCAM_REG_BRIGHTNESS || reg == INDYCAM_REG_VERSION) { |
d203a7ec RB |
103 | dprintk("indycam_write_reg(): " |
104 | "skipping read-only register %d\n", reg); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | dprintk("Writing Reg %d = 0x%02x\n", reg, value); | |
109 | err = i2c_smbus_write_byte_data(client, reg, value); | |
a637a114 | 110 | |
d203a7ec RB |
111 | if (err) { |
112 | printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, " | |
113 | "register = 0x%02x, value = 0x%02x\n", reg, value); | |
114 | } | |
115 | return err; | |
116 | } | |
117 | ||
2b80a191 | 118 | static int indycam_write_block(struct v4l2_subdev *sd, u8 reg, |
a637a114 | 119 | u8 length, u8 *data) |
d203a7ec | 120 | { |
a637a114 | 121 | int i, err; |
d203a7ec | 122 | |
a637a114 | 123 | for (i = 0; i < length; i++) { |
2b80a191 | 124 | err = indycam_write_reg(sd, reg + i, data[i]); |
d203a7ec RB |
125 | if (err) |
126 | return err; | |
127 | } | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | /* Helper functions */ | |
133 | ||
134 | #ifdef INDYCAM_DEBUG | |
2b80a191 | 135 | static void indycam_regdump_debug(struct v4l2_subdev *sd) |
d203a7ec RB |
136 | { |
137 | int i; | |
a637a114 | 138 | u8 val; |
d203a7ec RB |
139 | |
140 | for (i = 0; i < 9; i++) { | |
2b80a191 | 141 | indycam_read_reg(sd, i, &val); |
d203a7ec RB |
142 | dprintk("Reg %d = 0x%02x\n", i, val); |
143 | } | |
144 | } | |
145 | #endif | |
146 | ||
2b80a191 | 147 | static int indycam_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
d203a7ec | 148 | { |
2b80a191 | 149 | struct indycam *camera = to_indycam(sd); |
a637a114 LM |
150 | u8 reg; |
151 | int ret = 0; | |
152 | ||
cf4e9484 HV |
153 | switch (ctrl->id) { |
154 | case V4L2_CID_AUTOGAIN: | |
155 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
2b80a191 | 156 | ret = indycam_read_reg(sd, INDYCAM_REG_CONTROL, ®); |
a637a114 LM |
157 | if (ret) |
158 | return -EIO; | |
cf4e9484 | 159 | if (ctrl->id == V4L2_CID_AUTOGAIN) |
a637a114 LM |
160 | ctrl->value = (reg & INDYCAM_CONTROL_AGCENA) |
161 | ? 1 : 0; | |
162 | else | |
163 | ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL) | |
164 | ? 1 : 0; | |
165 | break; | |
cf4e9484 | 166 | case V4L2_CID_EXPOSURE: |
2b80a191 | 167 | ret = indycam_read_reg(sd, INDYCAM_REG_SHUTTER, ®); |
a637a114 LM |
168 | if (ret) |
169 | return -EIO; | |
170 | ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1); | |
171 | break; | |
cf4e9484 | 172 | case V4L2_CID_GAIN: |
2b80a191 | 173 | ret = indycam_read_reg(sd, INDYCAM_REG_GAIN, ®); |
a637a114 LM |
174 | if (ret) |
175 | return -EIO; | |
176 | ctrl->value = (s32)reg; | |
177 | break; | |
cf4e9484 | 178 | case V4L2_CID_RED_BALANCE: |
2b80a191 | 179 | ret = indycam_read_reg(sd, INDYCAM_REG_RED_BALANCE, ®); |
a637a114 LM |
180 | if (ret) |
181 | return -EIO; | |
182 | ctrl->value = (s32)reg; | |
183 | break; | |
cf4e9484 | 184 | case V4L2_CID_BLUE_BALANCE: |
2b80a191 | 185 | ret = indycam_read_reg(sd, INDYCAM_REG_BLUE_BALANCE, ®); |
a637a114 LM |
186 | if (ret) |
187 | return -EIO; | |
188 | ctrl->value = (s32)reg; | |
189 | break; | |
190 | case INDYCAM_CONTROL_RED_SATURATION: | |
2b80a191 | 191 | ret = indycam_read_reg(sd, |
a637a114 LM |
192 | INDYCAM_REG_RED_SATURATION, ®); |
193 | if (ret) | |
194 | return -EIO; | |
195 | ctrl->value = (s32)reg; | |
196 | break; | |
197 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
2b80a191 | 198 | ret = indycam_read_reg(sd, |
a637a114 LM |
199 | INDYCAM_REG_BLUE_SATURATION, ®); |
200 | if (ret) | |
201 | return -EIO; | |
202 | ctrl->value = (s32)reg; | |
203 | break; | |
cf4e9484 | 204 | case V4L2_CID_GAMMA: |
a637a114 | 205 | if (camera->version == CAMERA_VERSION_MOOSE) { |
2b80a191 | 206 | ret = indycam_read_reg(sd, |
a637a114 LM |
207 | INDYCAM_REG_GAMMA, ®); |
208 | if (ret) | |
209 | return -EIO; | |
210 | ctrl->value = (s32)reg; | |
211 | } else { | |
212 | ctrl->value = INDYCAM_GAMMA_DEFAULT; | |
213 | } | |
214 | break; | |
215 | default: | |
216 | ret = -EINVAL; | |
217 | } | |
d203a7ec | 218 | |
a637a114 | 219 | return ret; |
d203a7ec RB |
220 | } |
221 | ||
2b80a191 | 222 | static int indycam_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
d203a7ec | 223 | { |
2b80a191 | 224 | struct indycam *camera = to_indycam(sd); |
a637a114 LM |
225 | u8 reg; |
226 | int ret = 0; | |
227 | ||
cf4e9484 HV |
228 | switch (ctrl->id) { |
229 | case V4L2_CID_AUTOGAIN: | |
230 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
2b80a191 | 231 | ret = indycam_read_reg(sd, INDYCAM_REG_CONTROL, ®); |
a637a114 LM |
232 | if (ret) |
233 | break; | |
d203a7ec | 234 | |
cf4e9484 | 235 | if (ctrl->id == V4L2_CID_AUTOGAIN) { |
a637a114 LM |
236 | if (ctrl->value) |
237 | reg |= INDYCAM_CONTROL_AGCENA; | |
238 | else | |
239 | reg &= ~INDYCAM_CONTROL_AGCENA; | |
240 | } else { | |
241 | if (ctrl->value) | |
242 | reg |= INDYCAM_CONTROL_AWBCTL; | |
243 | else | |
244 | reg &= ~INDYCAM_CONTROL_AWBCTL; | |
245 | } | |
246 | ||
2b80a191 | 247 | ret = indycam_write_reg(sd, INDYCAM_REG_CONTROL, reg); |
a637a114 | 248 | break; |
cf4e9484 | 249 | case V4L2_CID_EXPOSURE: |
a637a114 | 250 | reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1); |
2b80a191 | 251 | ret = indycam_write_reg(sd, INDYCAM_REG_SHUTTER, reg); |
a637a114 | 252 | break; |
cf4e9484 | 253 | case V4L2_CID_GAIN: |
2b80a191 | 254 | ret = indycam_write_reg(sd, INDYCAM_REG_GAIN, ctrl->value); |
a637a114 | 255 | break; |
cf4e9484 | 256 | case V4L2_CID_RED_BALANCE: |
2b80a191 | 257 | ret = indycam_write_reg(sd, INDYCAM_REG_RED_BALANCE, |
a637a114 LM |
258 | ctrl->value); |
259 | break; | |
cf4e9484 | 260 | case V4L2_CID_BLUE_BALANCE: |
2b80a191 | 261 | ret = indycam_write_reg(sd, INDYCAM_REG_BLUE_BALANCE, |
a637a114 LM |
262 | ctrl->value); |
263 | break; | |
264 | case INDYCAM_CONTROL_RED_SATURATION: | |
2b80a191 | 265 | ret = indycam_write_reg(sd, INDYCAM_REG_RED_SATURATION, |
a637a114 LM |
266 | ctrl->value); |
267 | break; | |
268 | case INDYCAM_CONTROL_BLUE_SATURATION: | |
2b80a191 | 269 | ret = indycam_write_reg(sd, INDYCAM_REG_BLUE_SATURATION, |
a637a114 LM |
270 | ctrl->value); |
271 | break; | |
cf4e9484 | 272 | case V4L2_CID_GAMMA: |
a637a114 | 273 | if (camera->version == CAMERA_VERSION_MOOSE) { |
2b80a191 | 274 | ret = indycam_write_reg(sd, INDYCAM_REG_GAMMA, |
a637a114 LM |
275 | ctrl->value); |
276 | } | |
277 | break; | |
278 | default: | |
279 | ret = -EINVAL; | |
d203a7ec | 280 | } |
d203a7ec | 281 | |
a637a114 | 282 | return ret; |
d203a7ec RB |
283 | } |
284 | ||
285 | /* I2C-interface */ | |
286 | ||
2b80a191 HV |
287 | static int indycam_g_chip_ident(struct v4l2_subdev *sd, |
288 | struct v4l2_dbg_chip_ident *chip) | |
cf4e9484 | 289 | { |
2b80a191 HV |
290 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
291 | struct indycam *camera = to_indycam(sd); | |
cf4e9484 | 292 | |
2b80a191 HV |
293 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_INDYCAM, |
294 | camera->version); | |
295 | } | |
cf4e9484 | 296 | |
2b80a191 HV |
297 | /* ----------------------------------------------------------------------- */ |
298 | ||
299 | static const struct v4l2_subdev_core_ops indycam_core_ops = { | |
300 | .g_chip_ident = indycam_g_chip_ident, | |
301 | .g_ctrl = indycam_g_ctrl, | |
302 | .s_ctrl = indycam_s_ctrl, | |
303 | }; | |
304 | ||
305 | static const struct v4l2_subdev_ops indycam_ops = { | |
306 | .core = &indycam_core_ops, | |
307 | }; | |
308 | ||
cf4e9484 HV |
309 | static int indycam_probe(struct i2c_client *client, |
310 | const struct i2c_device_id *id) | |
d203a7ec RB |
311 | { |
312 | int err = 0; | |
313 | struct indycam *camera; | |
2b80a191 | 314 | struct v4l2_subdev *sd; |
d203a7ec | 315 | |
cf4e9484 HV |
316 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
317 | client->addr << 1, client->adapter->name); | |
d203a7ec | 318 | |
7408187d | 319 | camera = kzalloc(sizeof(struct indycam), GFP_KERNEL); |
cf4e9484 HV |
320 | if (!camera) |
321 | return -ENOMEM; | |
d203a7ec | 322 | |
2b80a191 HV |
323 | sd = &camera->sd; |
324 | v4l2_i2c_subdev_init(sd, client, &indycam_ops); | |
d203a7ec | 325 | |
a637a114 LM |
326 | camera->version = i2c_smbus_read_byte_data(client, |
327 | INDYCAM_REG_VERSION); | |
d203a7ec RB |
328 | if (camera->version != CAMERA_VERSION_INDY && |
329 | camera->version != CAMERA_VERSION_MOOSE) { | |
cf4e9484 HV |
330 | kfree(camera); |
331 | return -ENODEV; | |
d203a7ec | 332 | } |
cf4e9484 | 333 | |
d203a7ec RB |
334 | printk(KERN_INFO "IndyCam v%d.%d detected\n", |
335 | INDYCAM_VERSION_MAJOR(camera->version), | |
336 | INDYCAM_VERSION_MINOR(camera->version)); | |
337 | ||
2b80a191 | 338 | indycam_regdump(sd); |
d203a7ec RB |
339 | |
340 | // initialize | |
2b80a191 | 341 | err = indycam_write_block(sd, 0, sizeof(initseq), (u8 *)&initseq); |
d203a7ec | 342 | if (err) { |
c84e6036 | 343 | printk(KERN_ERR "IndyCam initialization failed\n"); |
cf4e9484 HV |
344 | kfree(camera); |
345 | return -EIO; | |
d203a7ec RB |
346 | } |
347 | ||
2b80a191 | 348 | indycam_regdump(sd); |
d203a7ec RB |
349 | |
350 | // white balance | |
2b80a191 | 351 | err = indycam_write_reg(sd, INDYCAM_REG_CONTROL, |
d203a7ec RB |
352 | INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL); |
353 | if (err) { | |
a637a114 | 354 | printk(KERN_ERR "IndyCam: White balancing camera failed\n"); |
cf4e9484 HV |
355 | kfree(camera); |
356 | return -EIO; | |
d203a7ec RB |
357 | } |
358 | ||
2b80a191 | 359 | indycam_regdump(sd); |
d203a7ec RB |
360 | |
361 | printk(KERN_INFO "IndyCam initialized\n"); | |
362 | ||
363 | return 0; | |
d203a7ec RB |
364 | } |
365 | ||
cf4e9484 | 366 | static int indycam_remove(struct i2c_client *client) |
d203a7ec | 367 | { |
2b80a191 | 368 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
d203a7ec | 369 | |
2b80a191 HV |
370 | v4l2_device_unregister_subdev(sd); |
371 | kfree(to_indycam(sd)); | |
d203a7ec RB |
372 | return 0; |
373 | } | |
374 | ||
cf4e9484 HV |
375 | static const struct i2c_device_id indycam_id[] = { |
376 | { "indycam", 0 }, | |
377 | { } | |
378 | }; | |
379 | MODULE_DEVICE_TABLE(i2c, indycam_id); | |
380 | ||
381 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { | |
382 | .name = "indycam", | |
cf4e9484 HV |
383 | .probe = indycam_probe, |
384 | .remove = indycam_remove, | |
cf4e9484 | 385 | .id_table = indycam_id, |
d203a7ec | 386 | }; |