diff options
Diffstat (limited to 'drivers/media/usb/gspca/pac207.c')
| -rw-r--r-- | drivers/media/usb/gspca/pac207.c | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/pac207.c b/drivers/media/usb/gspca/pac207.c new file mode 100644 index 0000000..83519be --- /dev/null +++ b/drivers/media/usb/gspca/pac207.c @@ -0,0 +1,489 @@ +/* + * Pixart PAC207BCA library + * + * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com> + * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li + * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr + * + * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> + * + * 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 + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define MODULE_NAME "pac207" + +#include <linux/input.h> +#include "gspca.h" +/* Include pac common sof detection functions */ +#include "pac_common.h" + +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_DESCRIPTION("Pixart PAC207"); +MODULE_LICENSE("GPL"); + +#define PAC207_CTRL_TIMEOUT 100 /* ms */ + +#define PAC207_BRIGHTNESS_MIN 0 +#define PAC207_BRIGHTNESS_MAX 255 +#define PAC207_BRIGHTNESS_DEFAULT 46 +#define PAC207_BRIGHTNESS_REG 0x08 + +#define PAC207_EXPOSURE_MIN 3 +#define PAC207_EXPOSURE_MAX 90 /* 1 sec expo time / 1 fps */ +#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 */ +#define PAC207_EXPOSURE_REG 0x02 + +#define PAC207_GAIN_MIN 0 +#define PAC207_GAIN_MAX 31 +#define PAC207_GAIN_DEFAULT 7 /* power on default: 9 */ +#define PAC207_GAIN_REG 0x0e + +#define PAC207_AUTOGAIN_DEADZONE 30 + +/* global parameters */ +static int led_invert; +module_param(led_invert, int, 0644); +MODULE_PARM_DESC(led_invert, "Invert led"); + +/* specific webcam descriptor */ +struct sd { + struct gspca_dev gspca_dev; /* !! must be the first item */ + + struct v4l2_ctrl *brightness; + + u8 mode; + u8 sof_read; + u8 header_read; + u8 autogain_ignore_frames; + + atomic_t avg_lum; +}; + +static const struct v4l2_pix_format sif_mode[] = { + {176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE, + .bytesperline = 176, + .sizeimage = (176 + 2) * 144, + /* uncompressed, add 2 bytes / line for line header */ + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 1}, + {352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE, + .bytesperline = 352, + /* compressed, but only when needed (not compressed + when the framerate is low) */ + .sizeimage = (352 + 2) * 288, + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 0}, +}; + +static const __u8 pac207_sensor_init[][8] = { + {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84}, + {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, + {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00}, + {0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00}, +}; + +static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, + const u8 *buffer, u16 length) +{ + struct usb_device *udev = gspca_dev->dev; + int err; + + if (gspca_dev->usb_err < 0) + return; + + memcpy(gspca_dev->usb_buf, buffer, length); + + err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, + 0x00, index, + gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT); + if (err < 0) { + pr_err("Failed to write registers to index 0x%04X, error %d\n", + index, err); + gspca_dev->usb_err = err; + } +} + +static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value) +{ + struct usb_device *udev = gspca_dev->dev; + int err; + + if (gspca_dev->usb_err < 0) + return; + + err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, + value, index, NULL, 0, PAC207_CTRL_TIMEOUT); + if (err) { + pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n", + index, value, err); + gspca_dev->usb_err = err; + } +} + +static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) +{ + struct usb_device *udev = gspca_dev->dev; + int res; + + if (gspca_dev->usb_err < 0) + return 0; + + res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, + 0x00, index, + gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT); + if (res < 0) { + pr_err("Failed to read a register (index 0x%04X, error %d)\n", + index, res); + gspca_dev->usb_err = res; + return 0; + } + + return gspca_dev->usb_buf[0]; +} + +/* this function is called at probe time */ +static int sd_config(struct gspca_dev *gspca_dev, + const struct usb_device_id *id) +{ + struct cam *cam; + u8 idreg[2]; + + idreg[0] = pac207_read_reg(gspca_dev, 0x0000); + idreg[1] = pac207_read_reg(gspca_dev, 0x0001); + idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4); + idreg[1] = idreg[1] & 0x0f; + PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X", + idreg[0], idreg[1]); + + if (idreg[0] != 0x27) { + PDEBUG(D_PROBE, "Error invalid sensor ID!"); + return -ENODEV; + } + + PDEBUG(D_PROBE, + "Pixart PAC207BCA Image Processor and Control Chip detected" + " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct); + + cam = &gspca_dev->cam; + cam->cam_mode = sif_mode; + cam->nmodes = ARRAY_SIZE(sif_mode); + + return 0; +} + +/* this function is called at probe and resume time */ +static int sd_init(struct gspca_dev *gspca_dev) +{ + u8 mode; + + /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ + if (led_invert) + mode = 0x02; + else + mode = 0x00; + pac207_write_reg(gspca_dev, 0x41, mode); + pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ + + return gspca_dev->usb_err; +} + +static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val) +{ + pac207_write_reg(gspca_dev, reg, val); + pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ + pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ +} + +static int sd_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct gspca_dev *gspca_dev = + container_of(ctrl->handler, struct gspca_dev, ctrl_handler); + struct sd *sd = (struct sd *)gspca_dev; + + gspca_dev->usb_err = 0; + + if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) { + /* when switching to autogain set defaults to make sure + we are on a valid point of the autogain gain / + exposure knee graph, and give this change time to + take effect before doing autogain. */ + gspca_dev->exposure->val = PAC207_EXPOSURE_DEFAULT; + gspca_dev->gain->val = PAC207_GAIN_DEFAULT; + sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; + } + + if (!gspca_dev->streaming) + return 0; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val); + break; + case V4L2_CID_AUTOGAIN: + if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val)) + setcontrol(gspca_dev, PAC207_EXPOSURE_REG, + gspca_dev->exposure->val); + if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val)) + setcontrol(gspca_dev, PAC207_GAIN_REG, + gspca_dev->gain->val); + break; + default: + return -EINVAL; + } + return gspca_dev->usb_err; +} + +static const struct v4l2_ctrl_ops sd_ctrl_ops = { + .s_ctrl = sd_s_ctrl, +}; + +/* this function is called at probe time */ +static int sd_init_controls(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; + + gspca_dev->vdev.ctrl_handler = hdl; + v4l2_ctrl_handler_init(hdl, 4); + + sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_BRIGHTNESS, + PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX, + 1, PAC207_BRIGHTNESS_DEFAULT); + gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_AUTOGAIN, 0, 1, 1, 1); + gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_EXPOSURE, + PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX, + 1, PAC207_EXPOSURE_DEFAULT); + gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_GAIN, + PAC207_GAIN_MIN, PAC207_GAIN_MAX, + 1, PAC207_GAIN_DEFAULT); + if (hdl->error) { + pr_err("Could not initialize controls\n"); + return hdl->error; + } + v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false); + return 0; +} + +/* -- start the camera -- */ +static int sd_start(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + __u8 mode; + + pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */ + pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8); + pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8); + pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8); + pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8); + + /* Compression Balance */ + if (gspca_dev->width == 176) + pac207_write_reg(gspca_dev, 0x4a, 0xff); + else + pac207_write_reg(gspca_dev, 0x4a, 0x30); + pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */ + pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness)); + + /* PGA global gain (Bit 4-0) */ + pac207_write_reg(gspca_dev, 0x0e, + v4l2_ctrl_g_ctrl(gspca_dev->gain)); + pac207_write_reg(gspca_dev, 0x02, + v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */ + + /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ + if (led_invert) + mode = 0x00; + else + mode = 0x02; + if (gspca_dev->width == 176) { /* 176x144 */ + mode |= 0x01; + PDEBUG(D_STREAM, "pac207_start mode 176x144"); + } else { /* 352x288 */ + PDEBUG(D_STREAM, "pac207_start mode 352x288"); + } + pac207_write_reg(gspca_dev, 0x41, mode); + + pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ + pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ + msleep(10); + pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */ + + sd->sof_read = 0; + sd->autogain_ignore_frames = 0; + atomic_set(&sd->avg_lum, -1); + return gspca_dev->usb_err; +} + +static void sd_stopN(struct gspca_dev *gspca_dev) +{ + u8 mode; + + /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ + if (led_invert) + mode = 0x02; + else + mode = 0x00; + pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */ + pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */ + pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ +} + + +static void pac207_do_auto_gain(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int avg_lum = atomic_read(&sd->avg_lum); + + if (avg_lum == -1) + return; + + if (sd->autogain_ignore_frames > 0) + sd->autogain_ignore_frames--; + else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum, + 90, PAC207_AUTOGAIN_DEADZONE)) + sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; +} + +static void sd_pkt_scan(struct gspca_dev *gspca_dev, + u8 *data, + int len) +{ + struct sd *sd = (struct sd *) gspca_dev; + unsigned char *sof; + + sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len); + if (sof) { + int n; + + /* finish decoding current frame */ + n = sof - data; + if (n > sizeof pac_sof_marker) + n -= sizeof pac_sof_marker; + else + n = 0; + gspca_frame_add(gspca_dev, LAST_PACKET, + data, n); + sd->header_read = 0; + gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0); + len -= sof - data; + data = sof; + } + if (sd->header_read < 11) { + int needed; + + /* get average lumination from frame header (byte 5) */ + if (sd->header_read < 5) { + needed = 5 - sd->header_read; + if (len >= needed) + atomic_set(&sd->avg_lum, data[needed - 1]); + } + /* skip the rest of the header */ + needed = 11 - sd->header_read; + if (len <= needed) { + sd->header_read += len; + return; + } + data += needed; + len -= needed; + sd->header_read = 11; + } + + gspca_frame_add(gspca_dev, INTER_PACKET, data, len); +} + +#if IS_ENABLED(CONFIG_INPUT) +static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, + u8 *data, /* interrupt packet data */ + int len) /* interrput packet length */ +{ + int ret = -EINVAL; + + if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) { + input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1); + input_sync(gspca_dev->input_dev); + input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); + input_sync(gspca_dev->input_dev); + ret = 0; + } + + return ret; +} +#endif + +/* sub-driver description */ +static const struct sd_desc sd_desc = { + .name = MODULE_NAME, + .config = sd_config, + .init = sd_init, + .init_controls = sd_init_controls, + .start = sd_start, + .stopN = sd_stopN, + .dq_callback = pac207_do_auto_gain, + .pkt_scan = sd_pkt_scan, +#if IS_ENABLED(CONFIG_INPUT) + .int_pkt_scan = sd_int_pkt_scan, +#endif +}; + +/* -- module initialisation -- */ +static const struct usb_device_id device_table[] = { + {USB_DEVICE(0x041e, 0x4028)}, + {USB_DEVICE(0x093a, 0x2460)}, + {USB_DEVICE(0x093a, 0x2461)}, + {USB_DEVICE(0x093a, 0x2463)}, + {USB_DEVICE(0x093a, 0x2464)}, + {USB_DEVICE(0x093a, 0x2468)}, + {USB_DEVICE(0x093a, 0x2470)}, + {USB_DEVICE(0x093a, 0x2471)}, + {USB_DEVICE(0x093a, 0x2472)}, + {USB_DEVICE(0x093a, 0x2474)}, + {USB_DEVICE(0x093a, 0x2476)}, + {USB_DEVICE(0x145f, 0x013a)}, + {USB_DEVICE(0x2001, 0xf115)}, + {} +}; +MODULE_DEVICE_TABLE(usb, device_table); + +/* -- device connect -- */ +static int sd_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), + THIS_MODULE); +} + +static struct usb_driver sd_driver = { + .name = MODULE_NAME, + .id_table = device_table, + .probe = sd_probe, + .disconnect = gspca_disconnect, +#ifdef CONFIG_PM + .suspend = gspca_suspend, + .resume = gspca_resume, + .reset_resume = gspca_resume, +#endif +}; + +module_usb_driver(sd_driver); |