diff options
Diffstat (limited to 'drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c')
| -rw-r--r-- | drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c b/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c new file mode 100644 index 000000000000..06fa54c5efb2 --- /dev/null +++ b/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c @@ -0,0 +1,540 @@ +/* + * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher + * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland + * Copyright (c) 2002, 2003 Tuukka Toivonen + * Copyright (c) 2008 Erik Andrén + * Copyright (c) 2008 Chia-I Wu + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * P/N 861037: Sensor HDCS1000 ASIC STV0600 + * P/N 861050-0010: Sensor HDCS1000 ASIC STV0600 + * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express + * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam + * P/N 861075-0040: Sensor HDCS1000 ASIC + * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB + * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "stv06xx_hdcs.h" + +static struct v4l2_pix_format hdcs1x00_mode[] = { + { + HDCS_1X00_DEF_WIDTH, + HDCS_1X00_DEF_HEIGHT, + V4L2_PIX_FMT_SGRBG8, + V4L2_FIELD_NONE, + .sizeimage = + HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT, + .bytesperline = HDCS_1X00_DEF_WIDTH, + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 1 + } +}; + +static struct v4l2_pix_format hdcs1020_mode[] = { + { + HDCS_1020_DEF_WIDTH, + HDCS_1020_DEF_HEIGHT, + V4L2_PIX_FMT_SGRBG8, + V4L2_FIELD_NONE, + .sizeimage = + HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT, + .bytesperline = HDCS_1020_DEF_WIDTH, + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 1 + } +}; + +enum hdcs_power_state { + HDCS_STATE_SLEEP, + HDCS_STATE_IDLE, + HDCS_STATE_RUN +}; + +/* no lock? */ +struct hdcs { + enum hdcs_power_state state; + int w, h; + + /* visible area of the sensor array */ + struct { + int left, top; + int width, height; + int border; + } array; + + struct { + /* Column timing overhead */ + u8 cto; + /* Column processing overhead */ + u8 cpo; + /* Row sample period constant */ + u16 rs; + /* Exposure reset duration */ + u16 er; + } exp; + + int psmp; +}; + +static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len) +{ + u8 regs[I2C_MAX_BYTES * 2]; + int i; + + if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) || + (reg + len > 0xff))) + return -EINVAL; + + for (i = 0; i < len; i++) { + regs[2 * i] = reg; + regs[2 * i + 1] = vals[i]; + /* All addresses are shifted left one bit + * as bit 0 toggles r/w */ + reg += 2; + } + + return stv06xx_write_sensor_bytes(sd, regs, len); +} + +static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state) +{ + struct hdcs *hdcs = sd->sensor_priv; + u8 val; + int ret; + + if (hdcs->state == state) + return 0; + + /* we need to go idle before running or sleeping */ + if (hdcs->state != HDCS_STATE_IDLE) { + ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0); + if (ret) + return ret; + } + + hdcs->state = HDCS_STATE_IDLE; + + if (state == HDCS_STATE_IDLE) + return 0; + + switch (state) { + case HDCS_STATE_SLEEP: + val = HDCS_SLEEP_MODE; + break; + + case HDCS_STATE_RUN: + val = HDCS_RUN_ENABLE; + break; + + default: + return -EINVAL; + } + + ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val); + + /* Update the state if the write succeeded */ + if (!ret) + hdcs->state = state; + + return ret; +} + +static int hdcs_reset(struct sd *sd) +{ + struct hdcs *hdcs = sd->sensor_priv; + int err; + + err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1); + if (err < 0) + return err; + + err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0); + if (err < 0) + hdcs->state = HDCS_STATE_IDLE; + + return err; +} + +static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + struct hdcs *hdcs = sd->sensor_priv; + int rowexp, srowexp; + int max_srowexp; + /* Column time period */ + int ct; + /* Column processing period */ + int cp; + /* Row processing period */ + int rp; + /* Minimum number of column timing periods + within the column processing period */ + int mnct; + int cycles, err; + u8 exp[14]; + + cycles = val * HDCS_CLK_FREQ_MHZ * 257; + + ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2); + cp = hdcs->exp.cto + (hdcs->w * ct / 2); + + /* the cycles one row takes */ + rp = hdcs->exp.rs + cp; + + rowexp = cycles / rp; + + /* the remaining cycles */ + cycles -= rowexp * rp; + + /* calculate sub-row exposure */ + if (IS_1020(sd)) { + /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */ + srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct; + + mnct = (hdcs->exp.er + 12 + ct - 1) / ct; + max_srowexp = hdcs->w - mnct; + } else { + /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */ + srowexp = cp - hdcs->exp.er - 6 - cycles; + + mnct = (hdcs->exp.er + 5 + ct - 1) / ct; + max_srowexp = cp - mnct * ct - 1; + } + + if (srowexp < 0) + srowexp = 0; + else if (srowexp > max_srowexp) + srowexp = max_srowexp; + + if (IS_1020(sd)) { + exp[0] = HDCS20_CONTROL; + exp[1] = 0x00; /* Stop streaming */ + exp[2] = HDCS_ROWEXPL; + exp[3] = rowexp & 0xff; + exp[4] = HDCS_ROWEXPH; + exp[5] = rowexp >> 8; + exp[6] = HDCS20_SROWEXP; + exp[7] = (srowexp >> 2) & 0xff; + exp[8] = HDCS20_ERROR; + exp[9] = 0x10; /* Clear exposure error flag*/ + exp[10] = HDCS20_CONTROL; + exp[11] = 0x04; /* Restart streaming */ + err = stv06xx_write_sensor_bytes(sd, exp, 6); + } else { + exp[0] = HDCS00_CONTROL; + exp[1] = 0x00; /* Stop streaming */ + exp[2] = HDCS_ROWEXPL; + exp[3] = rowexp & 0xff; + exp[4] = HDCS_ROWEXPH; + exp[5] = rowexp >> 8; + exp[6] = HDCS00_SROWEXPL; + exp[7] = srowexp & 0xff; + exp[8] = HDCS00_SROWEXPH; + exp[9] = srowexp >> 8; + exp[10] = HDCS_STATUS; + exp[11] = 0x10; /* Clear exposure error flag*/ + exp[12] = HDCS00_CONTROL; + exp[13] = 0x04; /* Restart streaming */ + err = stv06xx_write_sensor_bytes(sd, exp, 7); + if (err < 0) + return err; + } + PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d", + val, rowexp, srowexp); + return err; +} + +static int hdcs_set_gains(struct sd *sd, u8 g) +{ + int err; + u8 gains[4]; + + /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */ + if (g > 127) + g = 0x80 | (g / 2); + + gains[0] = g; + gains[1] = g; + gains[2] = g; + gains[3] = g; + + err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4); + return err; +} + +static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val) +{ + PDEBUG(D_V4L2, "Writing gain %d", val); + return hdcs_set_gains((struct sd *) gspca_dev, + val & 0xff); +} + +static int hdcs_set_size(struct sd *sd, + unsigned int width, unsigned int height) +{ + struct hdcs *hdcs = sd->sensor_priv; + u8 win[4]; + unsigned int x, y; + int err; + + /* must be multiple of 4 */ + width = (width + 3) & ~0x3; + height = (height + 3) & ~0x3; + + if (width > hdcs->array.width) + width = hdcs->array.width; + + if (IS_1020(sd)) { + /* the borders are also invalid */ + if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP + > hdcs->array.height) + height = hdcs->array.height - 2 * hdcs->array.border - + HDCS_1020_BOTTOM_Y_SKIP; + + y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2 + + hdcs->array.top; + } else { + if (height > hdcs->array.height) + height = hdcs->array.height; + + y = hdcs->array.top + (hdcs->array.height - height) / 2; + } + + x = hdcs->array.left + (hdcs->array.width - width) / 2; + + win[0] = y / 4; + win[1] = x / 4; + win[2] = (y + height) / 4 - 1; + win[3] = (x + width) / 4 - 1; + + err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4); + if (err < 0) + return err; + + /* Update the current width and height */ + hdcs->w = width; + hdcs->h = height; + return err; +} + +static int hdcs_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct gspca_dev *gspca_dev = + container_of(ctrl->handler, struct gspca_dev, ctrl_handler); + int err = -EINVAL; + + switch (ctrl->id) { + case V4L2_CID_GAIN: + err = hdcs_set_gain(gspca_dev, ctrl->val); + break; + case V4L2_CID_EXPOSURE: + err = hdcs_set_exposure(gspca_dev, ctrl->val); + break; + } + return err; +} + +static const struct v4l2_ctrl_ops hdcs_ctrl_ops = { + .s_ctrl = hdcs_s_ctrl, +}; + +static int hdcs_init_controls(struct sd *sd) +{ + struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler; + + v4l2_ctrl_handler_init(hdl, 2); + v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops, + V4L2_CID_EXPOSURE, 0, 0xff, 1, HDCS_DEFAULT_EXPOSURE); + v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops, + V4L2_CID_GAIN, 0, 0xff, 1, HDCS_DEFAULT_GAIN); + return hdl->error; +} + +static int hdcs_probe_1x00(struct sd *sd) +{ + struct hdcs *hdcs; + u16 sensor; + int ret; + + ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor); + if (ret < 0 || sensor != 0x08) + return -ENODEV; + + pr_info("HDCS-1000/1100 sensor detected\n"); + + sd->gspca_dev.cam.cam_mode = hdcs1x00_mode; + sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode); + + hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL); + if (!hdcs) + return -ENOMEM; + + hdcs->array.left = 8; + hdcs->array.top = 8; + hdcs->array.width = HDCS_1X00_DEF_WIDTH; + hdcs->array.height = HDCS_1X00_DEF_HEIGHT; + hdcs->array.border = 4; + + hdcs->exp.cto = 4; + hdcs->exp.cpo = 2; + hdcs->exp.rs = 186; + hdcs->exp.er = 100; + + /* + * Frame rate on HDCS-1000 with STV600 depends on PSMP: + * 4 = doesn't work at all + * 5 = 7.8 fps, + * 6 = 6.9 fps, + * 8 = 6.3 fps, + * 10 = 5.5 fps, + * 15 = 4.4 fps, + * 31 = 2.8 fps + * + * Frame rate on HDCS-1000 with STV602 depends on PSMP: + * 15 = doesn't work at all + * 18 = doesn't work at all + * 19 = 7.3 fps + * 20 = 7.4 fps + * 21 = 7.4 fps + * 22 = 7.4 fps + * 24 = 6.3 fps + * 30 = 5.4 fps + */ + hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5; + + sd->sensor_priv = hdcs; + + return 0; +} + +static int hdcs_probe_1020(struct sd *sd) +{ + struct hdcs *hdcs; + u16 sensor; + int ret; + + ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor); + if (ret < 0 || sensor != 0x10) + return -ENODEV; + + pr_info("HDCS-1020 sensor detected\n"); + + sd->gspca_dev.cam.cam_mode = hdcs1020_mode; + sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode); + + hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL); + if (!hdcs) + return -ENOMEM; + + /* + * From Andrey's test image: looks like HDCS-1020 upper-left + * visible pixel is at 24,8 (y maybe even smaller?) and lower-right + * visible pixel at 375,299 (x maybe even larger?) + */ + hdcs->array.left = 24; + hdcs->array.top = 4; + hdcs->array.width = HDCS_1020_DEF_WIDTH; + hdcs->array.height = 304; + hdcs->array.border = 4; + + hdcs->psmp = 6; + + hdcs->exp.cto = 3; + hdcs->exp.cpo = 3; + hdcs->exp.rs = 155; + hdcs->exp.er = 96; + + sd->sensor_priv = hdcs; + + return 0; +} + +static int hdcs_start(struct sd *sd) +{ + PDEBUG(D_STREAM, "Starting stream"); + + return hdcs_set_state(sd, HDCS_STATE_RUN); +} + +static int hdcs_stop(struct sd *sd) +{ + PDEBUG(D_STREAM, "Halting stream"); + + return hdcs_set_state(sd, HDCS_STATE_SLEEP); +} + +static int hdcs_init(struct sd *sd) +{ + struct hdcs *hdcs = sd->sensor_priv; + int i, err = 0; + + /* Set the STV0602AA in STV0600 emulation mode */ + if (sd->bridge == BRIDGE_STV602) + stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1); + + /* Execute the bridge init */ + for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) { + err = stv06xx_write_bridge(sd, stv_bridge_init[i][0], + stv_bridge_init[i][1]); + } + if (err < 0) + return err; + + /* sensor soft reset */ + hdcs_reset(sd); + + /* Execute the sensor init */ + for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) { + err = stv06xx_write_sensor(sd, stv_sensor_init[i][0], + stv_sensor_init[i][1]); + } + if (err < 0) + return err; + + /* Enable continuous frame capture, bit 2: stop when frame complete */ + err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3)); + if (err < 0) + return err; + + /* Set PGA sample duration + (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */ + if (IS_1020(sd)) + err = stv06xx_write_sensor(sd, HDCS_TCTRL, + (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp); + else + err = stv06xx_write_sensor(sd, HDCS_TCTRL, + (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp); + if (err < 0) + return err; + + return hdcs_set_size(sd, hdcs->array.width, hdcs->array.height); +} + +static int hdcs_dump(struct sd *sd) +{ + u16 reg, val; + + pr_info("Dumping sensor registers:\n"); + + for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) { + stv06xx_read_sensor(sd, reg, &val); + pr_info("reg 0x%02x = 0x%02x\n", reg, val); + } + return 0; +} |