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 m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
77 sd->sensor->i2c_slave_id);
78 m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
79 m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
80 m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
82 for (i = 0; i < len; i++) {
83 err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
85 PDEBUG(D_CONF, "Reading sensor register "
86 "0x%x containing 0x%x ", address, *i2c_data);
88 return (err < 0) ? err : 0;
91 int po1030_write_sensor(struct sd *sd, const u8 address,
92 u8 *i2c_data, const u8 len)
96 struct usb_device *udev = sd->gspca_dev.dev;
97 __u8 *buf = sd->gspca_dev.usb_buf;
99 /* The po1030 only supports one byte writes */
103 memcpy(buf, sensor_urb_skeleton, sizeof(sensor_urb_skeleton));
105 buf[11] = sd->sensor->i2c_slave_id;
110 /* Copy a four byte write sequence for each byte to be written to */
111 for (i = 0; i < len; i++) {
112 memcpy(p, sensor_urb_skeleton + 16, 4);
115 PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
116 address, i2c_data[i]);
119 /* Copy the footer */
120 memcpy(p, sensor_urb_skeleton + 20, 4);
122 /* Set the total length */
125 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
128 20 + len * 4, M5602_URB_MSG_TIMEOUT);
130 return (err < 0) ? err : 0;
133 int po1030_init(struct sd *sd)
137 /* Init the sensor */
138 for (i = 0; i < ARRAY_SIZE(init_po1030); i++) {
139 u8 data[2] = {0x00, 0x00};
141 switch (init_po1030[i][0]) {
143 err = m5602_write_bridge(sd,
149 data[0] = init_po1030[i][2];
150 err = po1030_write_sensor(sd,
151 init_po1030[i][1], data, 1);
155 data[0] = init_po1030[i][2];
156 data[1] = init_po1030[i][3];
157 err = po1030_write_sensor(sd,
158 init_po1030[i][1], data, 2);
161 info("Invalid stream command, exiting init");
167 po1030_dump_registers(sd);
169 return (err < 0) ? err : 0;
172 int po1030_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
174 struct sd *sd = (struct sd *) gspca_dev;
178 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_H,
182 *val = (i2c_data << 8);
184 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_M,
188 PDEBUG(D_V4L2, "Exposure read as %d", *val);
190 return (err < 0) ? err : 0;
193 int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
195 struct sd *sd = (struct sd *) gspca_dev;
199 PDEBUG(D_V4L2, "Set exposure to %d", val & 0xffff);
201 i2c_data = ((val & 0xff00) >> 8);
202 PDEBUG(D_V4L2, "Set exposure to high byte to 0x%x",
205 err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_H,
210 i2c_data = (val & 0xff);
211 PDEBUG(D_V4L2, "Set exposure to low byte to 0x%x",
213 err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_M,
217 return (err < 0) ? err : 0;
220 int po1030_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
222 struct sd *sd = (struct sd *) gspca_dev;
226 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
229 PDEBUG(D_V4L2, "Read global gain %d", *val);
231 return (err < 0) ? err : 0;
234 int po1030_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
236 struct sd *sd = (struct sd *) gspca_dev;
240 err = po1030_read_sensor(sd, PO1030_REG_CONTROL2,
243 *val = (i2c_data >> 7) & 0x01 ;
245 PDEBUG(D_V4L2, "Read hflip %d", *val);
247 return (err < 0) ? err : 0;
250 int po1030_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
252 struct sd *sd = (struct sd *) gspca_dev;
256 PDEBUG(D_V4L2, "Set hflip %d", val);
258 i2c_data = (val & 0x01) << 7;
260 err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
263 return (err < 0) ? err : 0;
266 int po1030_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
268 struct sd *sd = (struct sd *) gspca_dev;
272 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
275 *val = (i2c_data >> 6) & 0x01;
277 PDEBUG(D_V4L2, "Read vflip %d", *val);
279 return (err < 0) ? err : 0;
282 int po1030_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
284 struct sd *sd = (struct sd *) gspca_dev;
288 PDEBUG(D_V4L2, "Set vflip %d", val);
290 i2c_data = (val & 0x01) << 6;
292 err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
295 return (err < 0) ? err : 0;
298 int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val)
300 struct sd *sd = (struct sd *) gspca_dev;
304 i2c_data = val & 0xff;
305 PDEBUG(D_V4L2, "Set global gain to %d", i2c_data);
306 err = po1030_write_sensor(sd, PO1030_REG_GLOBALGAIN,
308 return (err < 0) ? err : 0;
311 int po1030_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
313 struct sd *sd = (struct sd *) gspca_dev;
317 err = po1030_read_sensor(sd, PO1030_REG_RED_GAIN,
320 PDEBUG(D_V4L2, "Read red gain %d", *val);
321 return (err < 0) ? err : 0;
324 int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
326 struct sd *sd = (struct sd *) gspca_dev;
330 i2c_data = val & 0xff;
331 PDEBUG(D_V4L2, "Set red gain to %d", i2c_data);
332 err = po1030_write_sensor(sd, PO1030_REG_RED_GAIN,
334 return (err < 0) ? err : 0;
337 int po1030_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
339 struct sd *sd = (struct sd *) gspca_dev;
343 err = po1030_read_sensor(sd, PO1030_REG_BLUE_GAIN,
346 PDEBUG(D_V4L2, "Read blue gain %d", *val);
348 return (err < 0) ? err : 0;
351 int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
353 struct sd *sd = (struct sd *) gspca_dev;
356 i2c_data = val & 0xff;
357 PDEBUG(D_V4L2, "Set blue gain to %d", i2c_data);
358 err = po1030_write_sensor(sd, PO1030_REG_BLUE_GAIN,
361 return (err < 0) ? err : 0;
364 int po1030_power_down(struct sd *sd)
369 void po1030_dump_registers(struct sd *sd)
374 info("Dumping the po1030 sensor core registers");
375 for (address = 0; address < 0x7f; address++) {
376 po1030_read_sensor(sd, address, &value, 1);
377 info("register 0x%x contains 0x%x",
381 info("po1030 register state dump complete");
383 info("Probing for which registers that are read/write");
384 for (address = 0; address < 0xff; address++) {
385 u8 old_value, ctrl_value;
386 u8 test_value[2] = {0xff, 0xff};
388 po1030_read_sensor(sd, address, &old_value, 1);
389 po1030_write_sensor(sd, address, test_value, 1);
390 po1030_read_sensor(sd, address, &ctrl_value, 1);
392 if (ctrl_value == test_value[0])
393 info("register 0x%x is writeable", address);
395 info("register 0x%x is read only", address);
397 /* Restore original value */
398 po1030_write_sensor(sd, address, &old_value, 1);