aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/ovcamchip/ov7x10.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/ovcamchip/ov7x10.c')
-rw-r--r--drivers/media/video/ovcamchip/ov7x10.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/drivers/media/video/ovcamchip/ov7x10.c b/drivers/media/video/ovcamchip/ov7x10.c
new file mode 100644
index 000000000000..6c383d4b14fa
--- /dev/null
+++ b/drivers/media/video/ovcamchip/ov7x10.c
@@ -0,0 +1,335 @@
1/* OmniVision OV7610/OV7110 Camera Chip Support Code
2 *
3 * Copyright (c) 1999-2004 Mark McClelland <mark@alpha.dyndns.org>
4 * http://alpha.dyndns.org/ov511/
5 *
6 * Color fixes by by Orion Sky Lawlor <olawlor@acm.org> (2/26/2000)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version. NO WARRANTY OF ANY KIND is expressed or implied.
12 */
13
14#define DEBUG
15
16#include <linux/slab.h>
17#include "ovcamchip_priv.h"
18
19/* Registers */
20#define REG_GAIN 0x00 /* gain [5:0] */
21#define REG_BLUE 0x01 /* blue channel balance */
22#define REG_RED 0x02 /* red channel balance */
23#define REG_SAT 0x03 /* saturation */
24#define REG_CNT 0x05 /* Y contrast */
25#define REG_BRT 0x06 /* Y brightness */
26#define REG_BLUE_BIAS 0x0C /* blue channel bias [5:0] */
27#define REG_RED_BIAS 0x0D /* red channel bias [5:0] */
28#define REG_GAMMA_COEFF 0x0E /* gamma settings */
29#define REG_WB_RANGE 0x0F /* AEC/ALC/S-AWB settings */
30#define REG_EXP 0x10 /* manual exposure setting */
31#define REG_CLOCK 0x11 /* polarity/clock prescaler */
32#define REG_FIELD_DIVIDE 0x16 /* field interval/mode settings */
33#define REG_HWIN_START 0x17 /* horizontal window start */
34#define REG_HWIN_END 0x18 /* horizontal window end */
35#define REG_VWIN_START 0x19 /* vertical window start */
36#define REG_VWIN_END 0x1A /* vertical window end */
37#define REG_PIXEL_SHIFT 0x1B /* pixel shift */
38#define REG_YOFFSET 0x21 /* Y channel offset */
39#define REG_UOFFSET 0x22 /* U channel offset */
40#define REG_ECW 0x24 /* exposure white level for AEC */
41#define REG_ECB 0x25 /* exposure black level for AEC */
42#define REG_FRAMERATE_H 0x2A /* frame rate MSB + misc */
43#define REG_FRAMERATE_L 0x2B /* frame rate LSB */
44#define REG_ALC 0x2C /* Auto Level Control settings */
45#define REG_VOFFSET 0x2E /* V channel offset adjustment */
46#define REG_ARRAY_BIAS 0x2F /* array bias -- don't change */
47#define REG_YGAMMA 0x33 /* misc gamma settings [7:6] */
48#define REG_BIAS_ADJUST 0x34 /* misc bias settings */
49
50/* Window parameters */
51#define HWSBASE 0x38
52#define HWEBASE 0x3a
53#define VWSBASE 0x05
54#define VWEBASE 0x05
55
56struct ov7x10 {
57 int auto_brt;
58 int auto_exp;
59 int bandfilt;
60 int mirror;
61};
62
63/* Lawrence Glaister <lg@jfm.bc.ca> reports:
64 *
65 * Register 0x0f in the 7610 has the following effects:
66 *
67 * 0x85 (AEC method 1): Best overall, good contrast range
68 * 0x45 (AEC method 2): Very overexposed
69 * 0xa5 (spec sheet default): Ok, but the black level is
70 * shifted resulting in loss of contrast
71 * 0x05 (old driver setting): very overexposed, too much
72 * contrast
73 */
74static struct ovcamchip_regvals regvals_init_7x10[] = {
75 { 0x10, 0xff },
76 { 0x16, 0x03 },
77 { 0x28, 0x24 },
78 { 0x2b, 0xac },
79 { 0x12, 0x00 },
80 { 0x38, 0x81 },
81 { 0x28, 0x24 }, /* 0c */
82 { 0x0f, 0x85 }, /* lg's setting */
83 { 0x15, 0x01 },
84 { 0x20, 0x1c },
85 { 0x23, 0x2a },
86 { 0x24, 0x10 },
87 { 0x25, 0x8a },
88 { 0x26, 0xa2 },
89 { 0x27, 0xc2 },
90 { 0x2a, 0x04 },
91 { 0x2c, 0xfe },
92 { 0x2d, 0x93 },
93 { 0x30, 0x71 },
94 { 0x31, 0x60 },
95 { 0x32, 0x26 },
96 { 0x33, 0x20 },
97 { 0x34, 0x48 },
98 { 0x12, 0x24 },
99 { 0x11, 0x01 },
100 { 0x0c, 0x24 },
101 { 0x0d, 0x24 },
102 { 0xff, 0xff }, /* END MARKER */
103};
104
105/* This initializes the OV7x10 camera chip and relevant variables. */
106static int ov7x10_init(struct i2c_client *c)
107{
108 struct ovcamchip *ov = i2c_get_clientdata(c);
109 struct ov7x10 *s;
110 int rc;
111
112 DDEBUG(4, &c->dev, "entered");
113
114 rc = ov_write_regvals(c, regvals_init_7x10);
115 if (rc < 0)
116 return rc;
117
118 ov->spriv = s = kmalloc(sizeof *s, GFP_KERNEL);
119 if (!s)
120 return -ENOMEM;
121 memset(s, 0, sizeof *s);
122
123 s->auto_brt = 1;
124 s->auto_exp = 1;
125
126 return rc;
127}
128
129static int ov7x10_free(struct i2c_client *c)
130{
131 struct ovcamchip *ov = i2c_get_clientdata(c);
132
133 kfree(ov->spriv);
134 return 0;
135}
136
137static int ov7x10_set_control(struct i2c_client *c,
138 struct ovcamchip_control *ctl)
139{
140 struct ovcamchip *ov = i2c_get_clientdata(c);
141 struct ov7x10 *s = ov->spriv;
142 int rc;
143 int v = ctl->value;
144
145 switch (ctl->id) {
146 case OVCAMCHIP_CID_CONT:
147 rc = ov_write(c, REG_CNT, v >> 8);
148 break;
149 case OVCAMCHIP_CID_BRIGHT:
150 rc = ov_write(c, REG_BRT, v >> 8);
151 break;
152 case OVCAMCHIP_CID_SAT:
153 rc = ov_write(c, REG_SAT, v >> 8);
154 break;
155 case OVCAMCHIP_CID_HUE:
156 rc = ov_write(c, REG_RED, 0xFF - (v >> 8));
157 if (rc < 0)
158 goto out;
159
160 rc = ov_write(c, REG_BLUE, v >> 8);
161 break;
162 case OVCAMCHIP_CID_EXP:
163 rc = ov_write(c, REG_EXP, v);
164 break;
165 case OVCAMCHIP_CID_FREQ:
166 {
167 int sixty = (v == 60);
168
169 rc = ov_write_mask(c, 0x2a, sixty?0x00:0x80, 0x80);
170 if (rc < 0)
171 goto out;
172
173 rc = ov_write(c, 0x2b, sixty?0x00:0xac);
174 if (rc < 0)
175 goto out;
176
177 rc = ov_write_mask(c, 0x13, 0x10, 0x10);
178 if (rc < 0)
179 goto out;
180
181 rc = ov_write_mask(c, 0x13, 0x00, 0x10);
182 break;
183 }
184 case OVCAMCHIP_CID_BANDFILT:
185 rc = ov_write_mask(c, 0x2d, v?0x04:0x00, 0x04);
186 s->bandfilt = v;
187 break;
188 case OVCAMCHIP_CID_AUTOBRIGHT:
189 rc = ov_write_mask(c, 0x2d, v?0x10:0x00, 0x10);
190 s->auto_brt = v;
191 break;
192 case OVCAMCHIP_CID_AUTOEXP:
193 rc = ov_write_mask(c, 0x29, v?0x00:0x80, 0x80);
194 s->auto_exp = v;
195 break;
196 case OVCAMCHIP_CID_MIRROR:
197 rc = ov_write_mask(c, 0x12, v?0x40:0x00, 0x40);
198 s->mirror = v;
199 break;
200 default:
201 DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);
202 return -EPERM;
203 }
204
205out:
206 DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, v, rc);
207 return rc;
208}
209
210static int ov7x10_get_control(struct i2c_client *c,
211 struct ovcamchip_control *ctl)
212{
213 struct ovcamchip *ov = i2c_get_clientdata(c);
214 struct ov7x10 *s = ov->spriv;
215 int rc = 0;
216 unsigned char val = 0;
217
218 switch (ctl->id) {
219 case OVCAMCHIP_CID_CONT:
220 rc = ov_read(c, REG_CNT, &val);
221 ctl->value = val << 8;
222 break;
223 case OVCAMCHIP_CID_BRIGHT:
224 rc = ov_read(c, REG_BRT, &val);
225 ctl->value = val << 8;
226 break;
227 case OVCAMCHIP_CID_SAT:
228 rc = ov_read(c, REG_SAT, &val);
229 ctl->value = val << 8;
230 break;
231 case OVCAMCHIP_CID_HUE:
232 rc = ov_read(c, REG_BLUE, &val);
233 ctl->value = val << 8;
234 break;
235 case OVCAMCHIP_CID_EXP:
236 rc = ov_read(c, REG_EXP, &val);
237 ctl->value = val;
238 break;
239 case OVCAMCHIP_CID_BANDFILT:
240 ctl->value = s->bandfilt;
241 break;
242 case OVCAMCHIP_CID_AUTOBRIGHT:
243 ctl->value = s->auto_brt;
244 break;
245 case OVCAMCHIP_CID_AUTOEXP:
246 ctl->value = s->auto_exp;
247 break;
248 case OVCAMCHIP_CID_MIRROR:
249 ctl->value = s->mirror;
250 break;
251 default:
252 DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);
253 return -EPERM;
254 }
255
256 DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, ctl->value, rc);
257 return rc;
258}
259
260static int ov7x10_mode_init(struct i2c_client *c, struct ovcamchip_window *win)
261{
262 int qvga = win->quarter;
263
264 /******** QVGA-specific regs ********/
265
266 ov_write(c, 0x14, qvga?0x24:0x04);
267
268 /******** Palette-specific regs ********/
269
270 if (win->format == VIDEO_PALETTE_GREY) {
271 ov_write_mask(c, 0x0e, 0x40, 0x40);
272 ov_write_mask(c, 0x13, 0x20, 0x20);
273 } else {
274 ov_write_mask(c, 0x0e, 0x00, 0x40);
275 ov_write_mask(c, 0x13, 0x00, 0x20);
276 }
277
278 /******** Clock programming ********/
279
280 ov_write(c, 0x11, win->clockdiv);
281
282 /******** Resolution-specific ********/
283
284 if (win->width == 640 && win->height == 480)
285 ov_write(c, 0x35, 0x9e);
286 else
287 ov_write(c, 0x35, 0x1e);
288
289 return 0;
290}
291
292static int ov7x10_set_window(struct i2c_client *c, struct ovcamchip_window *win)
293{
294 int ret, hwscale, vwscale;
295
296 ret = ov7x10_mode_init(c, win);
297 if (ret < 0)
298 return ret;
299
300 if (win->quarter) {
301 hwscale = 1;
302 vwscale = 0;
303 } else {
304 hwscale = 2;
305 vwscale = 1;
306 }
307
308 ov_write(c, 0x17, HWSBASE + (win->x >> hwscale));
309 ov_write(c, 0x18, HWEBASE + ((win->x + win->width) >> hwscale));
310 ov_write(c, 0x19, VWSBASE + (win->y >> vwscale));
311 ov_write(c, 0x1a, VWEBASE + ((win->y + win->height) >> vwscale));
312
313 return 0;
314}
315
316static int ov7x10_command(struct i2c_client *c, unsigned int cmd, void *arg)
317{
318 switch (cmd) {
319 case OVCAMCHIP_CMD_S_CTRL:
320 return ov7x10_set_control(c, arg);
321 case OVCAMCHIP_CMD_G_CTRL:
322 return ov7x10_get_control(c, arg);
323 case OVCAMCHIP_CMD_S_MODE:
324 return ov7x10_set_window(c, arg);
325 default:
326 DDEBUG(2, &c->dev, "command not supported: %d", cmd);
327 return -ENOIOCTLCMD;
328 }
329}
330
331struct ovcamchip_ops ov7x10_ops = {
332 .init = ov7x10_init,
333 .free = ov7x10_free,
334 .command = ov7x10_command,
335};