2 * Driver for the s5k83a sensor
4 * Copyright (C) 2008 Erik Andrén
5 * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
6 * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
8 * Portions of code to USB interface and ALi driver software,
9 * Copyright (c) 2006 Willem Duinker
10 * v4l2 interface modeled after the V4L2 driver
11 * for SN9C10x PC Camera Controllers
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation, version 2.
19 #include "m5602_s5k83a.h"
21 static void s5k83a_dump_registers(struct sd *sd);
23 int s5k83a_probe(struct sd *sd)
25 u8 prod_id = 0, ver_id = 0;
29 if (force_sensor == S5K83A_SENSOR) {
30 info("Forcing a %s sensor", s5k83a.name);
33 /* If we want to force another sensor, don't try to probe this
38 info("Probing for a s5k83a sensor");
40 /* Preinit the sensor */
41 for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
42 u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
43 if (preinit_s5k83a[i][0] == SENSOR)
44 err = m5602_write_sensor(sd, preinit_s5k83a[i][1],
47 err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
51 /* We don't know what register (if any) that contain the product id
52 * Just pick the first addresses that seem to produce the same results
53 * on multiple machines */
54 if (s5k83a_read_sensor(sd, 0x00, &prod_id, 1))
57 if (s5k83a_read_sensor(sd, 0x01, &ver_id, 1))
60 if ((prod_id == 0xff) || (ver_id == 0xff))
63 info("Detected a s5k83a sensor");
66 sd->gspca_dev.cam.cam_mode = s5k83a.modes;
67 sd->gspca_dev.cam.nmodes = s5k83a.nmodes;
68 sd->desc->ctrls = s5k83a.ctrls;
69 sd->desc->nctrls = s5k83a.nctrls;
73 int s5k83a_read_sensor(struct sd *sd, const u8 address,
74 u8 *i2c_data, const u8 len)
79 err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
80 } while ((*i2c_data & I2C_BUSY) && !err);
84 err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
85 sd->sensor->i2c_slave_id);
89 err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
93 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
96 err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
97 } while ((*i2c_data & I2C_BUSY) && !err);
99 for (i = 0; i < len && !len; i++) {
100 err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
102 PDEBUG(D_CONF, "Reading sensor register "
103 "0x%x containing 0x%x ", address, *i2c_data);
110 int s5k83a_init(struct sd *sd)
114 for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
115 u8 data[2] = {0x00, 0x00};
117 switch (init_s5k83a[i][0]) {
119 err = m5602_write_bridge(sd,
125 data[0] = init_s5k83a[i][2];
126 err = m5602_write_sensor(sd,
127 init_s5k83a[i][1], data, 1);
131 data[0] = init_s5k83a[i][2];
132 data[1] = init_s5k83a[i][3];
133 err = m5602_write_sensor(sd,
134 init_s5k83a[i][1], data, 2);
137 info("Invalid stream command, exiting init");
143 s5k83a_dump_registers(sd);
145 return (err < 0) ? err : 0;
148 int s5k83a_power_down(struct sd *sd)
153 void s5k83a_dump_registers(struct sd *sd)
157 s5k83a_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
159 for (page = 0; page < 16; page++) {
160 m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
161 info("Dumping the s5k83a register state for page 0x%x", page);
162 for (address = 0; address <= 0xff; address++) {
164 s5k83a_read_sensor(sd, address, &val, 1);
165 info("register 0x%x contains 0x%x",
169 info("s5k83a register state dump complete");
171 for (page = 0; page < 16; page++) {
172 m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
173 info("Probing for which registers that are read/write "
174 "for page 0x%x", page);
175 for (address = 0; address <= 0xff; address++) {
176 u8 old_val, ctrl_val, test_val = 0xff;
178 s5k83a_read_sensor(sd, address, &old_val, 1);
179 m5602_write_sensor(sd, address, &test_val, 1);
180 s5k83a_read_sensor(sd, address, &ctrl_val, 1);
182 if (ctrl_val == test_val)
183 info("register 0x%x is writeable", address);
185 info("register 0x%x is read only", address);
187 /* Restore original val */
188 m5602_write_sensor(sd, address, &old_val, 1);
191 info("Read/write register probing complete");
192 m5602_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
195 int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
199 struct sd *sd = (struct sd *) gspca_dev;
201 err = s5k83a_read_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
205 data[1] = data[1] << 1;
212 int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
216 struct sd *sd = (struct sd *) gspca_dev;
220 err = m5602_write_sensor(sd, 0x14, data, 2);
226 err = m5602_write_sensor(sd, 0x0d, data, 2);
230 /* FIXME: This is not sane, we need to figure out the composition
231 of these registers */
232 data[0] = val >> 3; /* brightness, high 5 bits */
233 data[1] = val >> 1; /* brightness, high 7 bits */
234 err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
240 int s5k83a_get_whiteness(struct gspca_dev *gspca_dev, __s32 *val)
244 struct sd *sd = (struct sd *) gspca_dev;
246 err = s5k83a_read_sensor(sd, S5K83A_WHITENESS, &data, 1);
256 int s5k83a_set_whiteness(struct gspca_dev *gspca_dev, __s32 val)
260 struct sd *sd = (struct sd *) gspca_dev;
263 err = m5602_write_sensor(sd, S5K83A_WHITENESS, data, 1);
268 int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
272 struct sd *sd = (struct sd *) gspca_dev;
274 err = s5k83a_read_sensor(sd, S5K83A_GAIN, data, 2);
278 data[1] = data[1] & 0x3f;
279 if (data[1] > S5K83A_MAXIMUM_GAIN)
280 data[1] = S5K83A_MAXIMUM_GAIN;
288 int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
292 struct sd *sd = (struct sd *) gspca_dev;
296 err = m5602_write_sensor(sd, S5K83A_GAIN, data, 2);
300 int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
304 struct sd *sd = (struct sd *) gspca_dev;
307 err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
311 err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
312 *val = (data[0] | 0x40) ? 1 : 0;
318 int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
322 struct sd *sd = (struct sd *) gspca_dev;
325 err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
329 err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
333 /* set or zero six bit, seven is hflip */
334 data[0] = (val) ? (data[0] & 0x80) | 0x40 | S5K83A_FLIP_MASK
335 : (data[0] & 0x80) | S5K83A_FLIP_MASK;
336 err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1);
340 data[0] = (val) ? 0x0b : 0x0a;
341 err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);
347 int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
351 struct sd *sd = (struct sd *) gspca_dev;
354 err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
358 err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
359 *val = (data[0] | 0x80) ? 1 : 0;
365 int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
369 struct sd *sd = (struct sd *) gspca_dev;
372 err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
376 err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
380 /* set or zero seven bit, six is vflip */
381 data[0] = (val) ? (data[0] & 0x40) | 0x80 | S5K83A_FLIP_MASK
382 : (data[0] & 0x40) | S5K83A_FLIP_MASK;
383 err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1);
387 data[0] = (val) ? 0x0a : 0x0b;
388 err = m5602_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);