602 lines
14 KiB
C
602 lines
14 KiB
C
/*
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* Driver for the s5k83a sensor
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*
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* Copyright (C) 2008 Erik Andrén
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* Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
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* Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
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*
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* Portions of code to USB interface and ALi driver software,
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* Copyright (c) 2006 Willem Duinker
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* v4l2 interface modeled after the V4L2 driver
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* for SN9C10x PC Camera Controllers
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#include <linux/kthread.h>
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#include "m5602_s5k83a.h"
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static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val);
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static int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
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static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val);
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static int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val);
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static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val);
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static int s5k83a_get_exposure(struct gspca_dev *gspca_dev, __s32 *val);
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static int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val);
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static int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val);
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static int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
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static int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
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static struct v4l2_pix_format s5k83a_modes[] = {
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{
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640,
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480,
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V4L2_PIX_FMT_SBGGR8,
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V4L2_FIELD_NONE,
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.sizeimage =
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640 * 480,
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.bytesperline = 640,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0
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}
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};
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static const struct ctrl s5k83a_ctrls[] = {
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#define GAIN_IDX 0
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{
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{
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "gain",
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.minimum = 0x00,
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.maximum = 0xff,
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.step = 0x01,
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.default_value = S5K83A_DEFAULT_GAIN,
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.flags = V4L2_CTRL_FLAG_SLIDER
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},
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.set = s5k83a_set_gain,
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.get = s5k83a_get_gain
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},
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#define BRIGHTNESS_IDX 1
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{
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{
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.id = V4L2_CID_BRIGHTNESS,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "brightness",
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.minimum = 0x00,
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.maximum = 0xff,
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.step = 0x01,
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.default_value = S5K83A_DEFAULT_BRIGHTNESS,
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.flags = V4L2_CTRL_FLAG_SLIDER
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},
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.set = s5k83a_set_brightness,
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.get = s5k83a_get_brightness,
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},
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#define EXPOSURE_IDX 2
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{
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{
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "exposure",
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.minimum = 0x00,
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.maximum = S5K83A_MAXIMUM_EXPOSURE,
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.step = 0x01,
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.default_value = S5K83A_DEFAULT_EXPOSURE,
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.flags = V4L2_CTRL_FLAG_SLIDER
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},
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.set = s5k83a_set_exposure,
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.get = s5k83a_get_exposure
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},
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#define HFLIP_IDX 3
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{
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{
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.id = V4L2_CID_HFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "horizontal flip",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0
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},
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.set = s5k83a_set_hflip,
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.get = s5k83a_get_hflip
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},
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#define VFLIP_IDX 4
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{
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{
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.id = V4L2_CID_VFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "vertical flip",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0
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},
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.set = s5k83a_set_vflip,
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.get = s5k83a_get_vflip
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}
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};
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static void s5k83a_dump_registers(struct sd *sd);
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static int s5k83a_get_rotation(struct sd *sd, u8 *reg_data);
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static int s5k83a_set_led_indication(struct sd *sd, u8 val);
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static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
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__s32 vflip, __s32 hflip);
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int s5k83a_probe(struct sd *sd)
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{
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struct s5k83a_priv *sens_priv;
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u8 prod_id = 0, ver_id = 0;
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int i, err = 0;
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if (force_sensor) {
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if (force_sensor == S5K83A_SENSOR) {
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info("Forcing a %s sensor", s5k83a.name);
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goto sensor_found;
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}
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/* If we want to force another sensor, don't try to probe this
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* one */
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return -ENODEV;
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}
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PDEBUG(D_PROBE, "Probing for a s5k83a sensor");
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/* Preinit the sensor */
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for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
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u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
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if (preinit_s5k83a[i][0] == SENSOR)
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err = m5602_write_sensor(sd, preinit_s5k83a[i][1],
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data, 2);
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else
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err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
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data[0]);
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}
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/* We don't know what register (if any) that contain the product id
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* Just pick the first addresses that seem to produce the same results
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* on multiple machines */
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if (m5602_read_sensor(sd, 0x00, &prod_id, 1))
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return -ENODEV;
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if (m5602_read_sensor(sd, 0x01, &ver_id, 1))
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return -ENODEV;
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if ((prod_id == 0xff) || (ver_id == 0xff))
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return -ENODEV;
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else
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info("Detected a s5k83a sensor");
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sensor_found:
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sens_priv = kmalloc(
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sizeof(struct s5k83a_priv), GFP_KERNEL);
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if (!sens_priv)
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return -ENOMEM;
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sens_priv->settings =
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kmalloc(sizeof(s32)*ARRAY_SIZE(s5k83a_ctrls), GFP_KERNEL);
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if (!sens_priv->settings) {
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kfree(sens_priv);
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return -ENOMEM;
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}
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sd->gspca_dev.cam.cam_mode = s5k83a_modes;
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sd->gspca_dev.cam.nmodes = ARRAY_SIZE(s5k83a_modes);
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sd->desc->ctrls = s5k83a_ctrls;
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sd->desc->nctrls = ARRAY_SIZE(s5k83a_ctrls);
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/* null the pointer! thread is't running now */
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sens_priv->rotation_thread = NULL;
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for (i = 0; i < ARRAY_SIZE(s5k83a_ctrls); i++)
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sens_priv->settings[i] = s5k83a_ctrls[i].qctrl.default_value;
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sd->sensor_priv = sens_priv;
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return 0;
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}
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int s5k83a_init(struct sd *sd)
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{
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int i, err = 0;
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s32 *sensor_settings =
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((struct s5k83a_priv *) sd->sensor_priv)->settings;
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for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
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u8 data[2] = {0x00, 0x00};
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switch (init_s5k83a[i][0]) {
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case BRIDGE:
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err = m5602_write_bridge(sd,
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init_s5k83a[i][1],
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init_s5k83a[i][2]);
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break;
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case SENSOR:
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data[0] = init_s5k83a[i][2];
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err = m5602_write_sensor(sd,
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init_s5k83a[i][1], data, 1);
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break;
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case SENSOR_LONG:
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data[0] = init_s5k83a[i][2];
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data[1] = init_s5k83a[i][3];
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err = m5602_write_sensor(sd,
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init_s5k83a[i][1], data, 2);
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break;
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default:
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info("Invalid stream command, exiting init");
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return -EINVAL;
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}
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}
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if (dump_sensor)
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s5k83a_dump_registers(sd);
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err = s5k83a_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
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if (err < 0)
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return err;
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err = s5k83a_set_brightness(&sd->gspca_dev,
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sensor_settings[BRIGHTNESS_IDX]);
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if (err < 0)
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return err;
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err = s5k83a_set_exposure(&sd->gspca_dev,
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sensor_settings[EXPOSURE_IDX]);
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if (err < 0)
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return err;
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err = s5k83a_set_hflip(&sd->gspca_dev, sensor_settings[HFLIP_IDX]);
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if (err < 0)
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return err;
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err = s5k83a_set_vflip(&sd->gspca_dev, sensor_settings[VFLIP_IDX]);
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return err;
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}
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static int rotation_thread_function(void *data)
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{
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struct sd *sd = (struct sd *) data;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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u8 reg, previous_rotation = 0;
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__s32 vflip, hflip;
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set_current_state(TASK_INTERRUPTIBLE);
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while (!schedule_timeout(100)) {
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if (mutex_lock_interruptible(&sd->gspca_dev.usb_lock))
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break;
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s5k83a_get_rotation(sd, ®);
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if (previous_rotation != reg) {
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previous_rotation = reg;
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info("Camera was flipped");
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s5k83a_get_vflip((struct gspca_dev *) sd, &vflip);
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s5k83a_get_hflip((struct gspca_dev *) sd, &hflip);
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if (reg) {
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vflip = !vflip;
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hflip = !hflip;
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}
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s5k83a_set_flip_real((struct gspca_dev *) sd,
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vflip, hflip);
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}
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mutex_unlock(&sd->gspca_dev.usb_lock);
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set_current_state(TASK_INTERRUPTIBLE);
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}
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/* return to "front" flip */
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if (previous_rotation) {
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s5k83a_get_vflip((struct gspca_dev *) sd, &vflip);
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s5k83a_get_hflip((struct gspca_dev *) sd, &hflip);
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s5k83a_set_flip_real((struct gspca_dev *) sd, vflip, hflip);
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}
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sens_priv->rotation_thread = NULL;
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return 0;
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}
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int s5k83a_start(struct sd *sd)
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{
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int i, err = 0;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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/* Create another thread, polling the GPIO ports of the camera to check
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if it got rotated. This is how the windows driver does it so we have
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to assume that there is no better way of accomplishing this */
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sens_priv->rotation_thread = kthread_create(rotation_thread_function,
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sd, "rotation thread");
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wake_up_process(sens_priv->rotation_thread);
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/* Preinit the sensor */
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for (i = 0; i < ARRAY_SIZE(start_s5k83a) && !err; i++) {
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u8 data[2] = {start_s5k83a[i][2], start_s5k83a[i][3]};
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if (start_s5k83a[i][0] == SENSOR)
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err = m5602_write_sensor(sd, start_s5k83a[i][1],
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data, 2);
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else
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err = m5602_write_bridge(sd, start_s5k83a[i][1],
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data[0]);
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}
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if (err < 0)
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return err;
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return s5k83a_set_led_indication(sd, 1);
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}
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int s5k83a_stop(struct sd *sd)
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{
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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if (sens_priv->rotation_thread)
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kthread_stop(sens_priv->rotation_thread);
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return s5k83a_set_led_indication(sd, 0);
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}
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void s5k83a_disconnect(struct sd *sd)
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{
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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s5k83a_stop(sd);
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sd->sensor = NULL;
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kfree(sens_priv->settings);
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kfree(sens_priv);
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}
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static int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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*val = sens_priv->settings[GAIN_IDX];
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return 0;
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}
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static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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sens_priv->settings[GAIN_IDX] = val;
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data[0] = 0x00;
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data[1] = 0x20;
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err = m5602_write_sensor(sd, 0x14, data, 2);
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if (err < 0)
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return err;
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data[0] = 0x01;
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data[1] = 0x00;
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err = m5602_write_sensor(sd, 0x0d, data, 2);
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if (err < 0)
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return err;
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/* FIXME: This is not sane, we need to figure out the composition
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of these registers */
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data[0] = val >> 3; /* gain, high 5 bits */
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data[1] = val >> 1; /* gain, high 7 bits */
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err = m5602_write_sensor(sd, S5K83A_GAIN, data, 2);
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return err;
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}
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static int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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*val = sens_priv->settings[BRIGHTNESS_IDX];
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return 0;
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}
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static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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sens_priv->settings[BRIGHTNESS_IDX] = val;
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data[0] = val;
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err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1);
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return err;
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}
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static int s5k83a_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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*val = sens_priv->settings[EXPOSURE_IDX];
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return 0;
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}
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static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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sens_priv->settings[EXPOSURE_IDX] = val;
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data[0] = 0;
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data[1] = val;
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err = m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2);
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return err;
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}
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static int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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*val = sens_priv->settings[VFLIP_IDX];
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return 0;
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}
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static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
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__s32 vflip, __s32 hflip)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x05;
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err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
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if (err < 0)
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return err;
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/* six bit is vflip, seven is hflip */
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data[0] = S5K83A_FLIP_MASK;
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data[0] = (vflip) ? data[0] | 0x40 : data[0];
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data[0] = (hflip) ? data[0] | 0x80 : data[0];
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err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1);
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if (err < 0)
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return err;
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data[0] = (vflip) ? 0x0b : 0x0a;
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err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);
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if (err < 0)
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return err;
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data[0] = (hflip) ? 0x0a : 0x0b;
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err = m5602_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);
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return err;
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}
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static int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
|
|
{
|
|
int err;
|
|
u8 reg;
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|
__s32 hflip;
|
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struct sd *sd = (struct sd *) gspca_dev;
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struct s5k83a_priv *sens_priv = sd->sensor_priv;
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|
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sens_priv->settings[VFLIP_IDX] = val;
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|
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s5k83a_get_hflip(gspca_dev, &hflip);
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|
|
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err = s5k83a_get_rotation(sd, ®);
|
|
if (err < 0)
|
|
return err;
|
|
if (reg) {
|
|
val = !val;
|
|
hflip = !hflip;
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|
}
|
|
|
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err = s5k83a_set_flip_real(gspca_dev, val, hflip);
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|
return err;
|
|
}
|
|
|
|
static int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
|
|
{
|
|
struct sd *sd = (struct sd *) gspca_dev;
|
|
struct s5k83a_priv *sens_priv = sd->sensor_priv;
|
|
|
|
*val = sens_priv->settings[HFLIP_IDX];
|
|
return 0;
|
|
}
|
|
|
|
static int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
|
|
{
|
|
int err;
|
|
u8 reg;
|
|
__s32 vflip;
|
|
struct sd *sd = (struct sd *) gspca_dev;
|
|
struct s5k83a_priv *sens_priv = sd->sensor_priv;
|
|
|
|
sens_priv->settings[HFLIP_IDX] = val;
|
|
|
|
s5k83a_get_vflip(gspca_dev, &vflip);
|
|
|
|
err = s5k83a_get_rotation(sd, ®);
|
|
if (err < 0)
|
|
return err;
|
|
if (reg) {
|
|
val = !val;
|
|
vflip = !vflip;
|
|
}
|
|
|
|
err = s5k83a_set_flip_real(gspca_dev, vflip, val);
|
|
return err;
|
|
}
|
|
|
|
static int s5k83a_set_led_indication(struct sd *sd, u8 val)
|
|
{
|
|
int err = 0;
|
|
u8 data[1];
|
|
|
|
err = m5602_read_bridge(sd, M5602_XB_GPIO_DAT, data);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (val)
|
|
data[0] = data[0] | S5K83A_GPIO_LED_MASK;
|
|
else
|
|
data[0] = data[0] & ~S5K83A_GPIO_LED_MASK;
|
|
|
|
err = m5602_write_bridge(sd, M5602_XB_GPIO_DAT, data[0]);
|
|
|
|
return err;
|
|
}
|
|
|
|
/* Get camera rotation on Acer notebooks */
|
|
static int s5k83a_get_rotation(struct sd *sd, u8 *reg_data)
|
|
{
|
|
int err = m5602_read_bridge(sd, M5602_XB_GPIO_DAT, reg_data);
|
|
*reg_data = (*reg_data & S5K83A_GPIO_ROTATION_MASK) ? 0 : 1;
|
|
return err;
|
|
}
|
|
|
|
static void s5k83a_dump_registers(struct sd *sd)
|
|
{
|
|
int address;
|
|
u8 page, old_page;
|
|
m5602_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
|
|
|
|
for (page = 0; page < 16; page++) {
|
|
m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
|
|
info("Dumping the s5k83a register state for page 0x%x", page);
|
|
for (address = 0; address <= 0xff; address++) {
|
|
u8 val = 0;
|
|
m5602_read_sensor(sd, address, &val, 1);
|
|
info("register 0x%x contains 0x%x",
|
|
address, val);
|
|
}
|
|
}
|
|
info("s5k83a register state dump complete");
|
|
|
|
for (page = 0; page < 16; page++) {
|
|
m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
|
|
info("Probing for which registers that are read/write "
|
|
"for page 0x%x", page);
|
|
for (address = 0; address <= 0xff; address++) {
|
|
u8 old_val, ctrl_val, test_val = 0xff;
|
|
|
|
m5602_read_sensor(sd, address, &old_val, 1);
|
|
m5602_write_sensor(sd, address, &test_val, 1);
|
|
m5602_read_sensor(sd, address, &ctrl_val, 1);
|
|
|
|
if (ctrl_val == test_val)
|
|
info("register 0x%x is writeable", address);
|
|
else
|
|
info("register 0x%x is read only", address);
|
|
|
|
/* Restore original val */
|
|
m5602_write_sensor(sd, address, &old_val, 1);
|
|
}
|
|
}
|
|
info("Read/write register probing complete");
|
|
m5602_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
|
|
}
|