2 * Driver for the po1030 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_po1030.h"
21 int po1030_probe(struct sd *sd)
23 u8 prod_id = 0, ver_id = 0, i;
26 if (force_sensor == PO1030_SENSOR) {
27 info("Forcing a %s sensor", po1030.name);
30 /* If we want to force another sensor, don't try to probe this
35 info("Probing for a po1030 sensor");
37 /* Run the pre-init to actually probe the unit */
38 for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) {
39 u8 data = preinit_po1030[i][2];
40 if (preinit_po1030[i][0] == SENSOR)
41 po1030_write_sensor(sd,
42 preinit_po1030[i][1], &data, 1);
44 m5602_write_bridge(sd, preinit_po1030[i][1], data);
47 if (po1030_read_sensor(sd, 0x3, &prod_id, 1))
50 if (po1030_read_sensor(sd, 0x4, &ver_id, 1))
53 if ((prod_id == 0x02) && (ver_id == 0xef)) {
54 info("Detected a po1030 sensor");
60 sd->gspca_dev.cam.cam_mode = po1030.modes;
61 sd->gspca_dev.cam.nmodes = po1030.nmodes;
62 sd->desc->ctrls = po1030.ctrls;
63 sd->desc->nctrls = po1030.nctrls;
67 int po1030_read_sensor(struct sd *sd, const u8 address,
68 u8 *i2c_data, const u8 len)
73 err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
74 } while ((*i2c_data & I2C_BUSY) && !err);
76 err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
77 sd->sensor->i2c_slave_id);
80 err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
83 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
86 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
90 for (i = 0; (i < len) && !err; i++) {
91 err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
93 PDEBUG(D_CONF, "Reading sensor register "
94 "0x%x containing 0x%x ", address, *i2c_data);
100 int po1030_write_sensor(struct sd *sd, const u8 address,
101 u8 *i2c_data, const u8 len)
105 struct usb_device *udev = sd->gspca_dev.dev;
106 __u8 *buf = sd->gspca_dev.usb_buf;
108 /* The po1030 only supports one byte writes */
112 memcpy(buf, sensor_urb_skeleton, sizeof(sensor_urb_skeleton));
114 buf[11] = sd->sensor->i2c_slave_id;
119 /* Copy a four byte write sequence for each byte to be written to */
120 for (i = 0; i < len; i++) {
121 memcpy(p, sensor_urb_skeleton + 16, 4);
124 PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
125 address, i2c_data[i]);
128 /* Copy the footer */
129 memcpy(p, sensor_urb_skeleton + 20, 4);
131 /* Set the total length */
134 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
137 20 + len * 4, M5602_URB_MSG_TIMEOUT);
139 return (err < 0) ? err : 0;
142 int po1030_init(struct sd *sd)
146 /* Init the sensor */
147 for (i = 0; i < ARRAY_SIZE(init_po1030) && !err; i++) {
148 u8 data[2] = {0x00, 0x00};
150 switch (init_po1030[i][0]) {
152 err = m5602_write_bridge(sd,
158 data[0] = init_po1030[i][2];
159 err = po1030_write_sensor(sd,
160 init_po1030[i][1], data, 1);
164 data[0] = init_po1030[i][2];
165 data[1] = init_po1030[i][3];
166 err = po1030_write_sensor(sd,
167 init_po1030[i][1], data, 2);
170 info("Invalid stream command, exiting init");
176 po1030_dump_registers(sd);
181 int po1030_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
183 struct sd *sd = (struct sd *) gspca_dev;
187 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_H,
191 *val = (i2c_data << 8);
193 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_M,
197 PDEBUG(D_V4L2, "Exposure read as %d", *val);
202 int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
204 struct sd *sd = (struct sd *) gspca_dev;
208 PDEBUG(D_V4L2, "Set exposure to %d", val & 0xffff);
210 i2c_data = ((val & 0xff00) >> 8);
211 PDEBUG(D_V4L2, "Set exposure to high byte to 0x%x",
214 err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_H,
219 i2c_data = (val & 0xff);
220 PDEBUG(D_V4L2, "Set exposure to low byte to 0x%x",
222 err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_M,
229 int po1030_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
231 struct sd *sd = (struct sd *) gspca_dev;
235 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
238 PDEBUG(D_V4L2, "Read global gain %d", *val);
243 int po1030_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
245 struct sd *sd = (struct sd *) gspca_dev;
249 err = po1030_read_sensor(sd, PO1030_REG_CONTROL2,
252 *val = (i2c_data >> 7) & 0x01 ;
254 PDEBUG(D_V4L2, "Read hflip %d", *val);
259 int po1030_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
261 struct sd *sd = (struct sd *) gspca_dev;
265 PDEBUG(D_V4L2, "Set hflip %d", val);
267 i2c_data = (val & 0x01) << 7;
269 err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
275 int po1030_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
277 struct sd *sd = (struct sd *) gspca_dev;
281 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
284 *val = (i2c_data >> 6) & 0x01;
286 PDEBUG(D_V4L2, "Read vflip %d", *val);
291 int po1030_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
293 struct sd *sd = (struct sd *) gspca_dev;
297 PDEBUG(D_V4L2, "Set vflip %d", val);
299 i2c_data = (val & 0x01) << 6;
301 err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
307 int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val)
309 struct sd *sd = (struct sd *) gspca_dev;
313 i2c_data = val & 0xff;
314 PDEBUG(D_V4L2, "Set global gain to %d", i2c_data);
315 err = po1030_write_sensor(sd, PO1030_REG_GLOBALGAIN,
320 int po1030_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
322 struct sd *sd = (struct sd *) gspca_dev;
326 err = po1030_read_sensor(sd, PO1030_REG_RED_GAIN,
329 PDEBUG(D_V4L2, "Read red gain %d", *val);
333 int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
335 struct sd *sd = (struct sd *) gspca_dev;
339 i2c_data = val & 0xff;
340 PDEBUG(D_V4L2, "Set red gain to %d", i2c_data);
341 err = po1030_write_sensor(sd, PO1030_REG_RED_GAIN,
346 int po1030_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
348 struct sd *sd = (struct sd *) gspca_dev;
352 err = po1030_read_sensor(sd, PO1030_REG_BLUE_GAIN,
355 PDEBUG(D_V4L2, "Read blue gain %d", *val);
360 int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
362 struct sd *sd = (struct sd *) gspca_dev;
365 i2c_data = val & 0xff;
366 PDEBUG(D_V4L2, "Set blue gain to %d", i2c_data);
367 err = po1030_write_sensor(sd, PO1030_REG_BLUE_GAIN,
373 int po1030_power_down(struct sd *sd)
378 void po1030_dump_registers(struct sd *sd)
383 info("Dumping the po1030 sensor core registers");
384 for (address = 0; address < 0x7f; address++) {
385 po1030_read_sensor(sd, address, &value, 1);
386 info("register 0x%x contains 0x%x",
390 info("po1030 register state dump complete");
392 info("Probing for which registers that are read/write");
393 for (address = 0; address < 0xff; address++) {
394 u8 old_value, ctrl_value;
395 u8 test_value[2] = {0xff, 0xff};
397 po1030_read_sensor(sd, address, &old_value, 1);
398 po1030_write_sensor(sd, address, test_value, 1);
399 po1030_read_sensor(sd, address, &ctrl_value, 1);
401 if (ctrl_value == test_value[0])
402 info("register 0x%x is writeable", address);
404 info("register 0x%x is read only", address);
406 /* Restore original value */
407 po1030_write_sensor(sd, address, &old_value, 1);