// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for the s5k83a sensor
*
* Copyright ( C ) 2008 Erik Andr é n
* Copyright ( C ) 2007 Ilyes Gouta . Based on the m5603x Linux Driver Project .
* Copyright ( C ) 2005 m5603x Linux Driver Project < m5602 @ x3ng . com . br >
*
* Portions of code to USB interface and ALi driver software ,
* Copyright ( c ) 2006 Willem Duinker
* v4l2 interface modeled after the V4L2 driver
* for SN9C10x PC Camera Controllers
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kthread.h>
#include "m5602_s5k83a.h"
static int s5k83a_s_ctrl(struct v4l2_ctrl *ctrl);
static const struct v4l2_ctrl_ops s5k83a_ctrl_ops = {
.s_ctrl = s5k83a_s_ctrl,
};
static struct v4l2_pix_format s5k83a_modes[] = {
{
640 ,
480 ,
V4L2_PIX_FMT_SBGGR8,
V4L2_FIELD_NONE,
.sizeimage =
640 * 480 ,
.bytesperline = 640 ,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0
}
};
static const unsigned char preinit_s5k83a[][4 ] = {
{BRIDGE, M5602_XB_MCU_CLK_DIV, 0 x02, 0 x00},
{BRIDGE, M5602_XB_MCU_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_ADC_CTRL, 0 xc0, 0 x00},
{BRIDGE, M5602_XB_SENSOR_TYPE, 0 x0d, 0 x00},
{BRIDGE, M5602_XB_SENSOR_CTRL, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SIG_INI, 0 x00, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR, 0 x1d, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT, 0 x08, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_H, 0 x3f, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_H, 0 x3f, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_H, 0 x00, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_L, 0 xff, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_L, 0 xff, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_L, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 x80, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_ADC_CTRL, 0 xc0, 0 x00},
{BRIDGE, M5602_XB_SENSOR_TYPE, 0 x09, 0 x00},
{BRIDGE, M5602_XB_MCU_CLK_DIV, 0 x02, 0 x00},
{BRIDGE, M5602_XB_MCU_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xf0, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR, 0 x1d, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT, 0 x1c, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_H, 0 x06, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_H, 0 x06, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_H, 0 x00, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_L, 0 x00, 0 x00},
{BRIDGE, M5602_XB_I2C_CLK_DIV, 0 x20, 0 x00},
};
/* This could probably be considerably shortened.
I don ' t have the hardware to experiment with it , patches welcome
*/
static const unsigned char init_s5k83a[][4 ] = {
/* The following sequence is useless after a clean boot
but is necessary after resume from suspend */
{BRIDGE, M5602_XB_GPIO_DIR, 0 x1d, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT, 0 x08, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_H, 0 x3f, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_H, 0 x3f, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_H, 0 x00, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_L, 0 xff, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_L, 0 xff, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_L, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 x80, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_ADC_CTRL, 0 xc0, 0 x00},
{BRIDGE, M5602_XB_SENSOR_TYPE, 0 x09, 0 x00},
{BRIDGE, M5602_XB_MCU_CLK_DIV, 0 x02, 0 x00},
{BRIDGE, M5602_XB_MCU_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xf0, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR, 0 x1d, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT, 0 x08, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_H, 0 x06, 0 x00},
{BRIDGE, M5602_XB_GPIO_DIR_H, 0 x06, 0 x00},
{BRIDGE, M5602_XB_GPIO_DAT_H, 0 x00, 0 x00},
{BRIDGE, M5602_XB_GPIO_EN_L, 0 x00, 0 x00},
{BRIDGE, M5602_XB_I2C_CLK_DIV, 0 x20, 0 x00},
{SENSOR, S5K83A_PAGE_MAP, 0 x04, 0 x00},
{SENSOR, 0 xaf, 0 x01, 0 x00},
{SENSOR, S5K83A_PAGE_MAP, 0 x00, 0 x00},
{SENSOR, 0 x7b, 0 xff, 0 x00},
{SENSOR, S5K83A_PAGE_MAP, 0 x05, 0 x00},
{SENSOR, 0 x01, 0 x50, 0 x00},
{SENSOR, 0 x12, 0 x20, 0 x00},
{SENSOR, 0 x17, 0 x40, 0 x00},
{SENSOR, 0 x1c, 0 x00, 0 x00},
{SENSOR, 0 x02, 0 x70, 0 x00},
{SENSOR, 0 x03, 0 x0b, 0 x00},
{SENSOR, 0 x04, 0 xf0, 0 x00},
{SENSOR, 0 x05, 0 x0b, 0 x00},
{SENSOR, 0 x06, 0 x71, 0 x00},
{SENSOR, 0 x07, 0 xe8, 0 x00}, /* 488 */
{SENSOR, 0 x08, 0 x02, 0 x00},
{SENSOR, 0 x09, 0 x88, 0 x00}, /* 648 */
{SENSOR, 0 x14, 0 x00, 0 x00},
{SENSOR, 0 x15, 0 x20, 0 x00}, /* 32 */
{SENSOR, 0 x19, 0 x00, 0 x00},
{SENSOR, 0 x1a, 0 x98, 0 x00}, /* 152 */
{SENSOR, 0 x0f, 0 x02, 0 x00},
{SENSOR, 0 x10, 0 xe5, 0 x00}, /* 741 */
/* normal colors
(this is value after boot, but after tries can be different) */
{SENSOR, 0 x00, 0 x06, 0 x00},
};
static const unsigned char start_s5k83a[][4 ] = {
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x06, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xb0, 0 x00},
{BRIDGE, M5602_XB_ADC_CTRL, 0 xc0, 0 x00},
{BRIDGE, M5602_XB_SENSOR_TYPE, 0 x09, 0 x00},
{BRIDGE, M5602_XB_LINE_OF_FRAME_H, 0 x81, 0 x00},
{BRIDGE, M5602_XB_PIX_OF_LINE_H, 0 x82, 0 x00},
{BRIDGE, M5602_XB_SIG_INI, 0 x01, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x01, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 xe4, 0 x00}, /* 484 */
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_VSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SIG_INI, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SIG_INI, 0 x02, 0 x00},
{BRIDGE, M5602_XB_HSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_HSYNC_PARA, 0 x00, 0 x00},
{BRIDGE, M5602_XB_HSYNC_PARA, 0 x02, 0 x00},
{BRIDGE, M5602_XB_HSYNC_PARA, 0 x7f, 0 x00}, /* 639 */
{BRIDGE, M5602_XB_SIG_INI, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_DIV, 0 x00, 0 x00},
{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0 xb0, 0 x00},
};
static void s5k83a_dump_registers(struct sd *sd);
static int s5k83a_get_rotation(struct sd *sd, u8 *reg_data);
static int s5k83a_set_led_indication(struct sd *sd, u8 val);
static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
__s32 vflip, __s32 hflip);
int s5k83a_probe(struct sd *sd)
{
u8 prod_id = 0 , ver_id = 0 ;
int i, err = 0 ;
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
if (force_sensor) {
if (force_sensor == S5K83A_SENSOR) {
pr_info("Forcing a %s sensor\n" , s5k83a.name);
goto sensor_found;
}
/* If we want to force another sensor, don't try to probe this
* one */
return -ENODEV;
}
gspca_dbg(gspca_dev, D_PROBE, "Probing for a s5k83a sensor\n" );
/* Preinit the sensor */
for (i = 0 ; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
u8 data[2 ] = {preinit_s5k83a[i][2 ], preinit_s5k83a[i][3 ]};
if (preinit_s5k83a[i][0 ] == SENSOR)
err = m5602_write_sensor(sd, preinit_s5k83a[i][1 ],
data, 2 );
else
err = m5602_write_bridge(sd, preinit_s5k83a[i][1 ],
data[0 ]);
}
/* We don't know what register (if any) that contain the product id
* Just pick the first addresses that seem to produce the same results
* on multiple machines */
if (m5602_read_sensor(sd, 0 x00, &prod_id, 1 ))
return -ENODEV;
if (m5602_read_sensor(sd, 0 x01, &ver_id, 1 ))
return -ENODEV;
if ((prod_id == 0 xff) || (ver_id == 0 xff))
return -ENODEV;
else
pr_info("Detected a s5k83a sensor\n" );
sensor_found:
sd->gspca_dev.cam.cam_mode = s5k83a_modes;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(s5k83a_modes);
/* null the pointer! thread is't running now */
sd->rotation_thread = NULL;
return 0 ;
}
int s5k83a_init(struct sd *sd)
{
int i, err = 0 ;
for (i = 0 ; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
u8 data[2 ] = {0 x00, 0 x00};
switch (init_s5k83a[i][0 ]) {
case BRIDGE:
err = m5602_write_bridge(sd,
init_s5k83a[i][1 ],
init_s5k83a[i][2 ]);
break ;
case SENSOR:
data[0 ] = init_s5k83a[i][2 ];
err = m5602_write_sensor(sd,
init_s5k83a[i][1 ], data, 1 );
break ;
case SENSOR_LONG:
data[0 ] = init_s5k83a[i][2 ];
data[1 ] = init_s5k83a[i][3 ];
err = m5602_write_sensor(sd,
init_s5k83a[i][1 ], data, 2 );
break ;
default :
pr_info("Invalid stream command, exiting init\n" );
return -EINVAL;
}
}
if (dump_sensor)
s5k83a_dump_registers(sd);
return err;
}
int s5k83a_init_controls(struct sd *sd)
{
struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
sd->gspca_dev.vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 6 );
v4l2_ctrl_new_std(hdl, &s5k83a_ctrl_ops, V4L2_CID_BRIGHTNESS,
0 , 255 , 1 , S5K83A_DEFAULT_BRIGHTNESS);
v4l2_ctrl_new_std(hdl, &s5k83a_ctrl_ops, V4L2_CID_EXPOSURE,
0 , S5K83A_MAXIMUM_EXPOSURE, 1 ,
S5K83A_DEFAULT_EXPOSURE);
v4l2_ctrl_new_std(hdl, &s5k83a_ctrl_ops, V4L2_CID_GAIN,
0 , 255 , 1 , S5K83A_DEFAULT_GAIN);
sd->hflip = v4l2_ctrl_new_std(hdl, &s5k83a_ctrl_ops, V4L2_CID_HFLIP,
0 , 1 , 1 , 0 );
sd->vflip = v4l2_ctrl_new_std(hdl, &s5k83a_ctrl_ops, V4L2_CID_VFLIP,
0 , 1 , 1 , 0 );
if (hdl->error) {
pr_err("Could not initialize controls\n" );
return hdl->error;
}
v4l2_ctrl_cluster(2 , &sd->hflip);
return 0 ;
}
static int rotation_thread_function(void *data)
{
struct sd *sd = (struct sd *) data;
u8 reg, previous_rotation = 0 ;
__s32 vflip, hflip;
set_current_state(TASK_INTERRUPTIBLE);
while (!schedule_timeout(msecs_to_jiffies(100 ))) {
if (mutex_lock_interruptible(&sd->gspca_dev.usb_lock))
break ;
s5k83a_get_rotation(sd, ®);
if (previous_rotation != reg) {
previous_rotation = reg;
pr_info("Camera was flipped\n" );
hflip = sd->hflip->val;
vflip = sd->vflip->val;
if (reg) {
vflip = !vflip;
hflip = !hflip;
}
s5k83a_set_flip_real((struct gspca_dev *) sd,
vflip, hflip);
}
mutex_unlock(&sd->gspca_dev.usb_lock);
set_current_state(TASK_INTERRUPTIBLE);
}
/* return to "front" flip */
if (previous_rotation) {
hflip = sd->hflip->val;
vflip = sd->vflip->val;
s5k83a_set_flip_real((struct gspca_dev *) sd, vflip, hflip);
}
sd->rotation_thread = NULL;
return 0 ;
}
int s5k83a_start(struct sd *sd)
{
int i, err = 0 ;
/* Create another thread, polling the GPIO ports of the camera to check
if it got rotated . This is how the windows driver does it so we have
to assume that there is no better way of accomplishing this */
sd->rotation_thread = kthread_run(rotation_thread_function,
sd, "rotation thread" );
if (IS_ERR(sd->rotation_thread)) {
err = PTR_ERR(sd->rotation_thread);
sd->rotation_thread = NULL;
return err;
}
/* Preinit the sensor */
for (i = 0 ; i < ARRAY_SIZE(start_s5k83a) && !err; i++) {
u8 data[2 ] = {start_s5k83a[i][2 ], start_s5k83a[i][3 ]};
if (start_s5k83a[i][0 ] == SENSOR)
err = m5602_write_sensor(sd, start_s5k83a[i][1 ],
data, 2 );
else
err = m5602_write_bridge(sd, start_s5k83a[i][1 ],
data[0 ]);
}
if (err < 0 )
return err;
return s5k83a_set_led_indication(sd, 1 );
}
int s5k83a_stop(struct sd *sd)
{
if (sd->rotation_thread)
kthread_stop(sd->rotation_thread);
return s5k83a_set_led_indication(sd, 0 );
}
void s5k83a_disconnect(struct sd *sd)
{
s5k83a_stop(sd);
sd->sensor = NULL;
}
static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 data[2 ];
struct sd *sd = (struct sd *) gspca_dev;
data[0 ] = 0 x00;
data[1 ] = 0 x20;
err = m5602_write_sensor(sd, 0 x14, data, 2 );
if (err < 0 )
return err;
data[0 ] = 0 x01;
data[1 ] = 0 x00;
err = m5602_write_sensor(sd, 0 x0d, data, 2 );
if (err < 0 )
return err;
/* FIXME: This is not sane, we need to figure out the composition
of these registers */
data[0 ] = val >> 3 ; /* gain, high 5 bits */
data[1 ] = val >> 1 ; /* gain, high 7 bits */
err = m5602_write_sensor(sd, S5K83A_GAIN, data, 2 );
return err;
}
static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
{
u8 data[1 ];
struct sd *sd = (struct sd *) gspca_dev;
data[0 ] = val;
return m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1 );
}
static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
u8 data[2 ];
struct sd *sd = (struct sd *) gspca_dev;
data[0 ] = 0 ;
data[1 ] = val;
return m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2 );
}
static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
__s32 vflip, __s32 hflip)
{
int err;
u8 data[1 ];
struct sd *sd = (struct sd *) gspca_dev;
data[0 ] = 0 x05;
err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1 );
if (err < 0 )
return err;
/* six bit is vflip, seven is hflip */
data[0 ] = S5K83A_FLIP_MASK;
data[0 ] = (vflip) ? data[0 ] | 0 x40 : data[0 ];
data[0 ] = (hflip) ? data[0 ] | 0 x80 : data[0 ];
err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1 );
if (err < 0 )
return err;
data[0 ] = (vflip) ? 0 x0b : 0 x0a;
err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1 );
if (err < 0 )
return err;
data[0 ] = (hflip) ? 0 x0a : 0 x0b;
err = m5602_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1 );
return err;
}
static int s5k83a_set_hvflip(struct gspca_dev *gspca_dev)
{
int err;
u8 reg;
struct sd *sd = (struct sd *) gspca_dev;
int hflip = sd->hflip->val;
int vflip = sd->vflip->val;
err = s5k83a_get_rotation(sd, ®);
if (err < 0 )
return err;
if (reg) {
hflip = !hflip;
vflip = !vflip;
}
err = s5k83a_set_flip_real(gspca_dev, vflip, hflip);
return err;
}
static int s5k83a_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
int err;
if (!gspca_dev->streaming)
return 0 ;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
err = s5k83a_set_brightness(gspca_dev, ctrl->val);
break ;
case V4L2_CID_EXPOSURE:
err = s5k83a_set_exposure(gspca_dev, ctrl->val);
break ;
case V4L2_CID_GAIN:
err = s5k83a_set_gain(gspca_dev, ctrl->val);
break ;
case V4L2_CID_HFLIP:
err = s5k83a_set_hvflip(gspca_dev);
break ;
default :
return -EINVAL;
}
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 );
pr_info("Dumping the s5k83a register state for page 0x%x\n" ,
page);
for (address = 0 ; address <= 0 xff; address++) {
u8 val = 0 ;
m5602_read_sensor(sd, address, &val, 1 );
pr_info("register 0x%x contains 0x%x\n" , address, val);
}
}
pr_info("s5k83a register state dump complete\n" );
for (page = 0 ; page < 16 ; page++) {
m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1 );
pr_info("Probing for which registers that are read/write for page 0x%x\n" ,
page);
for (address = 0 ; address <= 0 xff; address++) {
u8 old_val, ctrl_val, test_val = 0 xff;
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)
pr_info("register 0x%x is writeable\n" ,
address);
else
pr_info("register 0x%x is read only\n" ,
address);
/* Restore original val */
m5602_write_sensor(sd, address, &old_val, 1 );
}
}
pr_info("Read/write register probing complete\n" );
m5602_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1 );
}
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