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 static void po1030_dump_registers(struct sd *sd);
23 int po1030_probe(struct sd *sd)
25 u8 prod_id = 0, ver_id = 0, i;
28 if (force_sensor == PO1030_SENSOR) {
29 info("Forcing a %s sensor", po1030.name);
32 /* If we want to force another sensor, don't try to probe this
37 info("Probing for a po1030 sensor");
39 /* Run the pre-init to actually probe the unit */
40 for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) {
41 u8 data = preinit_po1030[i][2];
42 if (preinit_po1030[i][0] == SENSOR)
43 m5602_write_sensor(sd,
44 preinit_po1030[i][1], &data, 1);
46 m5602_write_bridge(sd, preinit_po1030[i][1], data);
49 if (po1030_read_sensor(sd, 0x3, &prod_id, 1))
52 if (po1030_read_sensor(sd, 0x4, &ver_id, 1))
55 if ((prod_id == 0x02) && (ver_id == 0xef)) {
56 info("Detected a po1030 sensor");
62 sd->gspca_dev.cam.cam_mode = po1030.modes;
63 sd->gspca_dev.cam.nmodes = po1030.nmodes;
64 sd->desc->ctrls = po1030.ctrls;
65 sd->desc->nctrls = po1030.nctrls;
69 int po1030_read_sensor(struct sd *sd, const u8 address,
70 u8 *i2c_data, const u8 len)
75 err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
76 } while ((*i2c_data & I2C_BUSY) && !err);
78 err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
79 sd->sensor->i2c_slave_id);
82 err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
85 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
88 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
92 for (i = 0; (i < len) && !err; i++) {
93 err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
95 PDEBUG(D_CONF, "Reading sensor register "
96 "0x%x containing 0x%x ", address, *i2c_data);
102 int po1030_write_sensor(struct sd *sd, const u8 address,
103 u8 *i2c_data, const u8 len)
107 struct usb_device *udev = sd->gspca_dev.dev;
108 __u8 *buf = sd->gspca_dev.usb_buf;
110 /* The po1030 only supports one byte writes */
114 memcpy(buf, sensor_urb_skeleton, sizeof(sensor_urb_skeleton));
116 buf[11] = sd->sensor->i2c_slave_id;
121 /* Copy a four byte write sequence for each byte to be written to */
122 for (i = 0; i < len; i++) {
123 memcpy(p, sensor_urb_skeleton + 16, 4);
126 PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
127 address, i2c_data[i]);
130 /* Copy the footer */
131 memcpy(p, sensor_urb_skeleton + 20, 4);
133 /* Set the total length */
136 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
139 20 + len * 4, M5602_URB_MSG_TIMEOUT);
141 return (err < 0) ? err : 0;
144 int po1030_init(struct sd *sd)
148 /* Init the sensor */
149 for (i = 0; i < ARRAY_SIZE(init_po1030) && !err; i++) {
150 u8 data[2] = {0x00, 0x00};
152 switch (init_po1030[i][0]) {
154 err = m5602_write_bridge(sd,
160 data[0] = init_po1030[i][2];
161 err = m5602_write_sensor(sd,
162 init_po1030[i][1], data, 1);
166 data[0] = init_po1030[i][2];
167 data[1] = init_po1030[i][3];
168 err = m5602_write_sensor(sd,
169 init_po1030[i][1], data, 2);
172 info("Invalid stream command, exiting init");
178 po1030_dump_registers(sd);
183 int po1030_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
185 struct sd *sd = (struct sd *) gspca_dev;
189 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_H,
193 *val = (i2c_data << 8);
195 err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_M,
199 PDEBUG(D_V4L2, "Exposure read as %d", *val);
204 int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
206 struct sd *sd = (struct sd *) gspca_dev;
210 PDEBUG(D_V4L2, "Set exposure to %d", val & 0xffff);
212 i2c_data = ((val & 0xff00) >> 8);
213 PDEBUG(D_V4L2, "Set exposure to high byte to 0x%x",
216 err = m5602_write_sensor(sd, PO1030_REG_INTEGLINES_H,
221 i2c_data = (val & 0xff);
222 PDEBUG(D_V4L2, "Set exposure to low byte to 0x%x",
224 err = m5602_write_sensor(sd, PO1030_REG_INTEGLINES_M,
231 int po1030_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
233 struct sd *sd = (struct sd *) gspca_dev;
237 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
240 PDEBUG(D_V4L2, "Read global gain %d", *val);
245 int po1030_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
247 struct sd *sd = (struct sd *) gspca_dev;
251 err = po1030_read_sensor(sd, PO1030_REG_CONTROL2,
254 *val = (i2c_data >> 7) & 0x01 ;
256 PDEBUG(D_V4L2, "Read hflip %d", *val);
261 int po1030_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
263 struct sd *sd = (struct sd *) gspca_dev;
267 PDEBUG(D_V4L2, "Set hflip %d", val);
269 i2c_data = (val & 0x01) << 7;
271 err = m5602_write_sensor(sd, PO1030_REG_CONTROL2,
277 int po1030_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
279 struct sd *sd = (struct sd *) gspca_dev;
283 err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
286 *val = (i2c_data >> 6) & 0x01;
288 PDEBUG(D_V4L2, "Read vflip %d", *val);
293 int po1030_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
295 struct sd *sd = (struct sd *) gspca_dev;
299 PDEBUG(D_V4L2, "Set vflip %d", val);
301 i2c_data = (val & 0x01) << 6;
303 err = m5602_write_sensor(sd, PO1030_REG_CONTROL2,
309 int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val)
311 struct sd *sd = (struct sd *) gspca_dev;
315 i2c_data = val & 0xff;
316 PDEBUG(D_V4L2, "Set global gain to %d", i2c_data);
317 err = m5602_write_sensor(sd, PO1030_REG_GLOBALGAIN,
322 int po1030_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
324 struct sd *sd = (struct sd *) gspca_dev;
328 err = po1030_read_sensor(sd, PO1030_REG_RED_GAIN,
331 PDEBUG(D_V4L2, "Read red gain %d", *val);
335 int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
337 struct sd *sd = (struct sd *) gspca_dev;
341 i2c_data = val & 0xff;
342 PDEBUG(D_V4L2, "Set red gain to %d", i2c_data);
343 err = m5602_write_sensor(sd, PO1030_REG_RED_GAIN,
348 int po1030_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
350 struct sd *sd = (struct sd *) gspca_dev;
354 err = po1030_read_sensor(sd, PO1030_REG_BLUE_GAIN,
357 PDEBUG(D_V4L2, "Read blue gain %d", *val);
362 int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
364 struct sd *sd = (struct sd *) gspca_dev;
367 i2c_data = val & 0xff;
368 PDEBUG(D_V4L2, "Set blue gain to %d", i2c_data);
369 err = m5602_write_sensor(sd, PO1030_REG_BLUE_GAIN,
375 int po1030_power_down(struct sd *sd)
380 static void po1030_dump_registers(struct sd *sd)
385 info("Dumping the po1030 sensor core registers");
386 for (address = 0; address < 0x7f; address++) {
387 po1030_read_sensor(sd, address, &value, 1);
388 info("register 0x%x contains 0x%x",
392 info("po1030 register state dump complete");
394 info("Probing for which registers that are read/write");
395 for (address = 0; address < 0xff; address++) {
396 u8 old_value, ctrl_value;
397 u8 test_value[2] = {0xff, 0xff};
399 po1030_read_sensor(sd, address, &old_value, 1);
400 m5602_write_sensor(sd, address, test_value, 1);
401 po1030_read_sensor(sd, address, &ctrl_value, 1);
403 if (ctrl_value == test_value[0])
404 info("register 0x%x is writeable", address);
406 info("register 0x%x is read only", address);
408 /* Restore original value */
409 m5602_write_sensor(sd, address, &old_value, 1);