diff options
Diffstat (limited to 'drivers/media/usb/gspca/m5602/m5602_s5k83a.c')
| -rw-r--r-- | drivers/media/usb/gspca/m5602/m5602_s5k83a.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/m5602/m5602_s5k83a.c b/drivers/media/usb/gspca/m5602/m5602_s5k83a.c new file mode 100644 index 0000000..7cbc3a0 --- /dev/null +++ b/drivers/media/usb/gspca/m5602/m5602_s5k83a.c @@ -0,0 +1,456 @@ +/* + * Driver for the s5k83a sensor + * + * Copyright (C) 2008 Erik AndrĂ©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 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + * + */ + +#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 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; + } + + PDEBUG(D_PROBE, "Probing for a s5k83a sensor"); + + /* 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, 0x00, &prod_id, 1)) + return -ENODEV; + + if (m5602_read_sensor(sd, 0x01, &ver_id, 1)) + return -ENODEV; + + if ((prod_id == 0xff) || (ver_id == 0xff)) + 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] = {0x00, 0x00}; + + 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(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_create(rotation_thread_function, + sd, "rotation thread"); + wake_up_process(sd->rotation_thread); + + /* 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] = 0x00; + data[1] = 0x20; + err = m5602_write_sensor(sd, 0x14, data, 2); + if (err < 0) + return err; + + data[0] = 0x01; + data[1] = 0x00; + err = m5602_write_sensor(sd, 0x0d, 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) +{ + int err; + u8 data[1]; + struct sd *sd = (struct sd *) gspca_dev; + + data[0] = val; + err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1); + return err; +} + +static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val) +{ + int err; + u8 data[2]; + struct sd *sd = (struct sd *) gspca_dev; + + data[0] = 0; + data[1] = val; + err = m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2); + return err; +} + +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] = 0x05; + 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] | 0x40 : data[0]; + data[0] = (hflip) ? data[0] | 0x80 : data[0]; + + err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1); + if (err < 0) + return err; + + data[0] = (vflip) ? 0x0b : 0x0a; + err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1); + if (err < 0) + return err; + + data[0] = (hflip) ? 0x0a : 0x0b; + 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 <= 0xff; 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 <= 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) + 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); +} |