diff options
Diffstat (limited to 'drivers/media/usb/gspca/w996Xcf.c')
| -rw-r--r-- | drivers/media/usb/gspca/w996Xcf.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/w996Xcf.c b/drivers/media/usb/gspca/w996Xcf.c new file mode 100644 index 000000000000..9e3a909e0a00 --- /dev/null +++ b/drivers/media/usb/gspca/w996Xcf.c @@ -0,0 +1,567 @@ +/** + * + * GSPCA sub driver for W996[78]CF JPEG USB Dual Mode Camera Chip. + * + * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com> + * + * This module is adapted from the in kernel v4l1 w9968cf driver: + * + * Copyright (C) 2002-2004 by Luca Risolia <luca.risolia@studio.unibo.it> + * + * 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 + * 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 + * + */ + +/* Note this is not a stand alone driver, it gets included in ov519.c, this + is a bit of a hack, but it needs the driver code for a lot of different + ov sensors which is already present in ov519.c (the old v4l1 driver used + the ovchipcam framework). When we have the time we really should move + the sensor drivers to v4l2 sub drivers, and properly split of this + driver from ov519.c */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define W9968CF_I2C_BUS_DELAY 4 /* delay in us for I2C bit r/w operations */ + +#define Y_QUANTABLE (&sd->jpeg_hdr[JPEG_QT0_OFFSET]) +#define UV_QUANTABLE (&sd->jpeg_hdr[JPEG_QT1_OFFSET]) + +static const struct v4l2_pix_format w9968cf_vga_mode[] = { + {160, 120, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, + .bytesperline = 160 * 2, + .sizeimage = 160 * 120 * 2, + .colorspace = V4L2_COLORSPACE_JPEG}, + {176, 144, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, + .bytesperline = 176 * 2, + .sizeimage = 176 * 144 * 2, + .colorspace = V4L2_COLORSPACE_JPEG}, + {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, + .bytesperline = 320 * 2, + .sizeimage = 320 * 240 * 2, + .colorspace = V4L2_COLORSPACE_JPEG}, + {352, 288, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, + .bytesperline = 352 * 2, + .sizeimage = 352 * 288 * 2, + .colorspace = V4L2_COLORSPACE_JPEG}, + {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, + .bytesperline = 640 * 2, + .sizeimage = 640 * 480 * 2, + .colorspace = V4L2_COLORSPACE_JPEG}, +}; + +static void reg_w(struct sd *sd, u16 index, u16 value); + +/*-------------------------------------------------------------------------- + Write 64-bit data to the fast serial bus registers. + Return 0 on success, -1 otherwise. + --------------------------------------------------------------------------*/ +static void w9968cf_write_fsb(struct sd *sd, u16* data) +{ + struct usb_device *udev = sd->gspca_dev.dev; + u16 value; + int ret; + + if (sd->gspca_dev.usb_err < 0) + return; + + value = *data++; + memcpy(sd->gspca_dev.usb_buf, data, 6); + + ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0, + USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, + value, 0x06, sd->gspca_dev.usb_buf, 6, 500); + if (ret < 0) { + pr_err("Write FSB registers failed (%d)\n", ret); + sd->gspca_dev.usb_err = ret; + } +} + +/*-------------------------------------------------------------------------- + Write data to the serial bus control register. + Return 0 on success, a negative number otherwise. + --------------------------------------------------------------------------*/ +static void w9968cf_write_sb(struct sd *sd, u16 value) +{ + int ret; + + if (sd->gspca_dev.usb_err < 0) + return; + + /* We don't use reg_w here, as that would cause all writes when + bitbanging i2c to be logged, making the logs impossible to read */ + ret = usb_control_msg(sd->gspca_dev.dev, + usb_sndctrlpipe(sd->gspca_dev.dev, 0), + 0, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, 0x01, NULL, 0, 500); + + udelay(W9968CF_I2C_BUS_DELAY); + + if (ret < 0) { + pr_err("Write SB reg [01] %04x failed\n", value); + sd->gspca_dev.usb_err = ret; + } +} + +/*-------------------------------------------------------------------------- + Read data from the serial bus control register. + Return 0 on success, a negative number otherwise. + --------------------------------------------------------------------------*/ +static int w9968cf_read_sb(struct sd *sd) +{ + int ret; + + if (sd->gspca_dev.usb_err < 0) + return -1; + + /* We don't use reg_r here, as the w9968cf is special and has 16 + bit registers instead of 8 bit */ + ret = usb_control_msg(sd->gspca_dev.dev, + usb_rcvctrlpipe(sd->gspca_dev.dev, 0), + 1, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, 0x01, sd->gspca_dev.usb_buf, 2, 500); + if (ret >= 0) { + ret = sd->gspca_dev.usb_buf[0] | + (sd->gspca_dev.usb_buf[1] << 8); + } else { + pr_err("Read SB reg [01] failed\n"); + sd->gspca_dev.usb_err = ret; + } + + udelay(W9968CF_I2C_BUS_DELAY); + + return ret; +} + +/*-------------------------------------------------------------------------- + Upload quantization tables for the JPEG compression. + This function is called by w9968cf_start_transfer(). + Return 0 on success, a negative number otherwise. + --------------------------------------------------------------------------*/ +static void w9968cf_upload_quantizationtables(struct sd *sd) +{ + u16 a, b; + int i, j; + + reg_w(sd, 0x39, 0x0010); /* JPEG clock enable */ + + for (i = 0, j = 0; i < 32; i++, j += 2) { + a = Y_QUANTABLE[j] | ((unsigned)(Y_QUANTABLE[j + 1]) << 8); + b = UV_QUANTABLE[j] | ((unsigned)(UV_QUANTABLE[j + 1]) << 8); + reg_w(sd, 0x40 + i, a); + reg_w(sd, 0x60 + i, b); + } + reg_w(sd, 0x39, 0x0012); /* JPEG encoder enable */ +} + +/**************************************************************************** + * Low-level I2C I/O functions. * + * The adapter supports the following I2C transfer functions: * + * i2c_adap_fastwrite_byte_data() (at 400 kHz bit frequency only) * + * i2c_adap_read_byte_data() * + * i2c_adap_read_byte() * + ****************************************************************************/ + +static void w9968cf_smbus_start(struct sd *sd) +{ + w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ + w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ +} + +static void w9968cf_smbus_stop(struct sd *sd) +{ + w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ + w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ +} + +static void w9968cf_smbus_write_byte(struct sd *sd, u8 v) +{ + u8 bit; + int sda; + + for (bit = 0 ; bit < 8 ; bit++) { + sda = (v & 0x80) ? 2 : 0; + v <<= 1; + /* SDE=1, SDA=sda, SCL=0 */ + w9968cf_write_sb(sd, 0x10 | sda); + /* SDE=1, SDA=sda, SCL=1 */ + w9968cf_write_sb(sd, 0x11 | sda); + /* SDE=1, SDA=sda, SCL=0 */ + w9968cf_write_sb(sd, 0x10 | sda); + } +} + +static void w9968cf_smbus_read_byte(struct sd *sd, u8 *v) +{ + u8 bit; + + /* No need to ensure SDA is high as we are always called after + read_ack which ends with SDA high */ + *v = 0; + for (bit = 0 ; bit < 8 ; bit++) { + *v <<= 1; + /* SDE=1, SDA=1, SCL=1 */ + w9968cf_write_sb(sd, 0x0013); + *v |= (w9968cf_read_sb(sd) & 0x0008) ? 1 : 0; + /* SDE=1, SDA=1, SCL=0 */ + w9968cf_write_sb(sd, 0x0012); + } +} + +static void w9968cf_smbus_write_nack(struct sd *sd) +{ + /* No need to ensure SDA is high as we are always called after + read_byte which ends with SDA high */ + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ +} + +static void w9968cf_smbus_read_ack(struct sd *sd) +{ + int sda; + + /* Ensure SDA is high before raising clock to avoid a spurious stop */ + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ + sda = w9968cf_read_sb(sd); + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ + if (sda >= 0 && (sda & 0x08)) { + PDEBUG(D_USBI, "Did not receive i2c ACK"); + sd->gspca_dev.usb_err = -EIO; + } +} + +/* SMBus protocol: S Addr Wr [A] Subaddr [A] Value [A] P */ +static void w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) +{ + u16* data = (u16 *)sd->gspca_dev.usb_buf; + + data[0] = 0x082f | ((sd->sensor_addr & 0x80) ? 0x1500 : 0x0); + data[0] |= (sd->sensor_addr & 0x40) ? 0x4000 : 0x0; + data[1] = 0x2082 | ((sd->sensor_addr & 0x40) ? 0x0005 : 0x0); + data[1] |= (sd->sensor_addr & 0x20) ? 0x0150 : 0x0; + data[1] |= (sd->sensor_addr & 0x10) ? 0x5400 : 0x0; + data[2] = 0x8208 | ((sd->sensor_addr & 0x08) ? 0x0015 : 0x0); + data[2] |= (sd->sensor_addr & 0x04) ? 0x0540 : 0x0; + data[2] |= (sd->sensor_addr & 0x02) ? 0x5000 : 0x0; + data[3] = 0x1d20 | ((sd->sensor_addr & 0x02) ? 0x0001 : 0x0); + data[3] |= (sd->sensor_addr & 0x01) ? 0x0054 : 0x0; + + w9968cf_write_fsb(sd, data); + + data[0] = 0x8208 | ((reg & 0x80) ? 0x0015 : 0x0); + data[0] |= (reg & 0x40) ? 0x0540 : 0x0; + data[0] |= (reg & 0x20) ? 0x5000 : 0x0; + data[1] = 0x0820 | ((reg & 0x20) ? 0x0001 : 0x0); + data[1] |= (reg & 0x10) ? 0x0054 : 0x0; + data[1] |= (reg & 0x08) ? 0x1500 : 0x0; + data[1] |= (reg & 0x04) ? 0x4000 : 0x0; + data[2] = 0x2082 | ((reg & 0x04) ? 0x0005 : 0x0); + data[2] |= (reg & 0x02) ? 0x0150 : 0x0; + data[2] |= (reg & 0x01) ? 0x5400 : 0x0; + data[3] = 0x001d; + + w9968cf_write_fsb(sd, data); + + data[0] = 0x8208 | ((value & 0x80) ? 0x0015 : 0x0); + data[0] |= (value & 0x40) ? 0x0540 : 0x0; + data[0] |= (value & 0x20) ? 0x5000 : 0x0; + data[1] = 0x0820 | ((value & 0x20) ? 0x0001 : 0x0); + data[1] |= (value & 0x10) ? 0x0054 : 0x0; + data[1] |= (value & 0x08) ? 0x1500 : 0x0; + data[1] |= (value & 0x04) ? 0x4000 : 0x0; + data[2] = 0x2082 | ((value & 0x04) ? 0x0005 : 0x0); + data[2] |= (value & 0x02) ? 0x0150 : 0x0; + data[2] |= (value & 0x01) ? 0x5400 : 0x0; + data[3] = 0xfe1d; + + w9968cf_write_fsb(sd, data); + + PDEBUG(D_USBO, "i2c 0x%02x -> [0x%02x]", value, reg); +} + +/* SMBus protocol: S Addr Wr [A] Subaddr [A] P S Addr+1 Rd [A] [Value] NA P */ +static int w9968cf_i2c_r(struct sd *sd, u8 reg) +{ + int ret = 0; + u8 value; + + /* Fast serial bus data control disable */ + w9968cf_write_sb(sd, 0x0013); /* don't change ! */ + + w9968cf_smbus_start(sd); + w9968cf_smbus_write_byte(sd, sd->sensor_addr); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_write_byte(sd, reg); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_stop(sd); + w9968cf_smbus_start(sd); + w9968cf_smbus_write_byte(sd, sd->sensor_addr + 1); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_read_byte(sd, &value); + /* signal we don't want to read anymore, the v4l1 driver used to + send an ack here which is very wrong! (and then fixed + the issues this gave by retrying reads) */ + w9968cf_smbus_write_nack(sd); + w9968cf_smbus_stop(sd); + + /* Fast serial bus data control re-enable */ + w9968cf_write_sb(sd, 0x0030); + + if (sd->gspca_dev.usb_err >= 0) { + ret = value; + PDEBUG(D_USBI, "i2c [0x%02X] -> 0x%02X", reg, value); + } else + PDEBUG(D_ERR, "i2c read [0x%02x] failed", reg); + + return ret; +} + +/*-------------------------------------------------------------------------- + Turn on the LED on some webcams. A beep should be heard too. + Return 0 on success, a negative number otherwise. + --------------------------------------------------------------------------*/ +static void w9968cf_configure(struct sd *sd) +{ + reg_w(sd, 0x00, 0xff00); /* power-down */ + reg_w(sd, 0x00, 0xbf17); /* reset everything */ + reg_w(sd, 0x00, 0xbf10); /* normal operation */ + reg_w(sd, 0x01, 0x0010); /* serial bus, SDS high */ + reg_w(sd, 0x01, 0x0000); /* serial bus, SDS low */ + reg_w(sd, 0x01, 0x0010); /* ..high 'beep-beep' */ + reg_w(sd, 0x01, 0x0030); /* Set sda scl to FSB mode */ + + sd->stopped = 1; +} + +static void w9968cf_init(struct sd *sd) +{ + unsigned long hw_bufsize = sd->sif ? (352 * 288 * 2) : (640 * 480 * 2), + y0 = 0x0000, + u0 = y0 + hw_bufsize / 2, + v0 = u0 + hw_bufsize / 4, + y1 = v0 + hw_bufsize / 4, + u1 = y1 + hw_bufsize / 2, + v1 = u1 + hw_bufsize / 4; + + reg_w(sd, 0x00, 0xff00); /* power off */ + reg_w(sd, 0x00, 0xbf10); /* power on */ + + reg_w(sd, 0x03, 0x405d); /* DRAM timings */ + reg_w(sd, 0x04, 0x0030); /* SDRAM timings */ + + reg_w(sd, 0x20, y0 & 0xffff); /* Y buf.0, low */ + reg_w(sd, 0x21, y0 >> 16); /* Y buf.0, high */ + reg_w(sd, 0x24, u0 & 0xffff); /* U buf.0, low */ + reg_w(sd, 0x25, u0 >> 16); /* U buf.0, high */ + reg_w(sd, 0x28, v0 & 0xffff); /* V buf.0, low */ + reg_w(sd, 0x29, v0 >> 16); /* V buf.0, high */ + + reg_w(sd, 0x22, y1 & 0xffff); /* Y buf.1, low */ + reg_w(sd, 0x23, y1 >> 16); /* Y buf.1, high */ + reg_w(sd, 0x26, u1 & 0xffff); /* U buf.1, low */ + reg_w(sd, 0x27, u1 >> 16); /* U buf.1, high */ + reg_w(sd, 0x2a, v1 & 0xffff); /* V buf.1, low */ + reg_w(sd, 0x2b, v1 >> 16); /* V buf.1, high */ + + reg_w(sd, 0x32, y1 & 0xffff); /* JPEG buf 0 low */ + reg_w(sd, 0x33, y1 >> 16); /* JPEG buf 0 high */ + + reg_w(sd, 0x34, y1 & 0xffff); /* JPEG buf 1 low */ + reg_w(sd, 0x35, y1 >> 16); /* JPEG bug 1 high */ + + reg_w(sd, 0x36, 0x0000);/* JPEG restart interval */ + reg_w(sd, 0x37, 0x0804);/*JPEG VLE FIFO threshold*/ + reg_w(sd, 0x38, 0x0000);/* disable hw up-scaling */ + reg_w(sd, 0x3f, 0x0000); /* JPEG/MCTL test data */ +} + +static void w9968cf_set_crop_window(struct sd *sd) +{ + int start_cropx, start_cropy, x, y, fw, fh, cw, ch, + max_width, max_height; + + if (sd->sif) { + max_width = 352; + max_height = 288; + } else { + max_width = 640; + max_height = 480; + } + + if (sd->sensor == SEN_OV7620) { + /* + * Sigh, this is dependend on the clock / framerate changes + * made by the frequency control, sick. + * + * Note we cannot use v4l2_ctrl_g_ctrl here, as we get called + * from ov519.c:setfreq() with the ctrl lock held! + */ + if (sd->freq->val == 1) { + start_cropx = 277; + start_cropy = 37; + } else { + start_cropx = 105; + start_cropy = 37; + } + } else { + start_cropx = 320; + start_cropy = 35; + } + + /* Work around to avoid FP arithmetics */ + #define SC(x) ((x) << 10) + + /* Scaling factors */ + fw = SC(sd->gspca_dev.width) / max_width; + fh = SC(sd->gspca_dev.height) / max_height; + + cw = (fw >= fh) ? max_width : SC(sd->gspca_dev.width) / fh; + ch = (fw >= fh) ? SC(sd->gspca_dev.height) / fw : max_height; + + sd->sensor_width = max_width; + sd->sensor_height = max_height; + + x = (max_width - cw) / 2; + y = (max_height - ch) / 2; + + reg_w(sd, 0x10, start_cropx + x); + reg_w(sd, 0x11, start_cropy + y); + reg_w(sd, 0x12, start_cropx + x + cw); + reg_w(sd, 0x13, start_cropy + y + ch); +} + +static void w9968cf_mode_init_regs(struct sd *sd) +{ + int val, vs_polarity, hs_polarity; + + w9968cf_set_crop_window(sd); + + reg_w(sd, 0x14, sd->gspca_dev.width); + reg_w(sd, 0x15, sd->gspca_dev.height); + + /* JPEG width & height */ + reg_w(sd, 0x30, sd->gspca_dev.width); + reg_w(sd, 0x31, sd->gspca_dev.height); + + /* Y & UV frame buffer strides (in WORD) */ + if (w9968cf_vga_mode[sd->gspca_dev.curr_mode].pixelformat == + V4L2_PIX_FMT_JPEG) { + reg_w(sd, 0x2c, sd->gspca_dev.width / 2); + reg_w(sd, 0x2d, sd->gspca_dev.width / 4); + } else + reg_w(sd, 0x2c, sd->gspca_dev.width); + + reg_w(sd, 0x00, 0xbf17); /* reset everything */ + reg_w(sd, 0x00, 0xbf10); /* normal operation */ + + /* Transfer size in WORDS (for UYVY format only) */ + val = sd->gspca_dev.width * sd->gspca_dev.height; + reg_w(sd, 0x3d, val & 0xffff); /* low bits */ + reg_w(sd, 0x3e, val >> 16); /* high bits */ + + if (w9968cf_vga_mode[sd->gspca_dev.curr_mode].pixelformat == + V4L2_PIX_FMT_JPEG) { + /* We may get called multiple times (usb isoc bw negotiat.) */ + jpeg_define(sd->jpeg_hdr, sd->gspca_dev.height, + sd->gspca_dev.width, 0x22); /* JPEG 420 */ + jpeg_set_qual(sd->jpeg_hdr, v4l2_ctrl_g_ctrl(sd->jpegqual)); + w9968cf_upload_quantizationtables(sd); + v4l2_ctrl_grab(sd->jpegqual, true); + } + + /* Video Capture Control Register */ + if (sd->sensor == SEN_OV7620) { + /* Seems to work around a bug in the image sensor */ + vs_polarity = 1; + hs_polarity = 1; + } else { + vs_polarity = 1; + hs_polarity = 0; + } + + val = (vs_polarity << 12) | (hs_polarity << 11); + + /* NOTE: We may not have enough memory to do double buffering while + doing compression (amount of memory differs per model cam). + So we use the second image buffer also as jpeg stream buffer + (see w9968cf_init), and disable double buffering. */ + if (w9968cf_vga_mode[sd->gspca_dev.curr_mode].pixelformat == + V4L2_PIX_FMT_JPEG) { + /* val |= 0x0002; YUV422P */ + val |= 0x0003; /* YUV420P */ + } else + val |= 0x0080; /* Enable HW double buffering */ + + /* val |= 0x0020; enable clamping */ + /* val |= 0x0008; enable (1-2-1) filter */ + /* val |= 0x000c; enable (2-3-6-3-2) filter */ + + val |= 0x8000; /* capt. enable */ + + reg_w(sd, 0x16, val); + + sd->gspca_dev.empty_packet = 0; +} + +static void w9968cf_stop0(struct sd *sd) +{ + v4l2_ctrl_grab(sd->jpegqual, false); + reg_w(sd, 0x39, 0x0000); /* disable JPEG encoder */ + reg_w(sd, 0x16, 0x0000); /* stop video capture */ +} + +/* The w9968cf docs say that a 0 sized packet means EOF (and also SOF + for the next frame). This seems to simply not be true when operating + in JPEG mode, in this case there may be empty packets within the + frame. So in JPEG mode use the JPEG SOI marker to detect SOF. + + Note to make things even more interesting the w9968cf sends *PLANAR* jpeg, + to be precise it sends: SOI, SOF, DRI, SOS, Y-data, SOS, U-data, SOS, + V-data, EOI. */ +static void w9968cf_pkt_scan(struct gspca_dev *gspca_dev, + u8 *data, /* isoc packet */ + int len) /* iso packet length */ +{ + struct sd *sd = (struct sd *) gspca_dev; + + if (w9968cf_vga_mode[gspca_dev->curr_mode].pixelformat == + V4L2_PIX_FMT_JPEG) { + if (len >= 2 && + data[0] == 0xff && + data[1] == 0xd8) { + gspca_frame_add(gspca_dev, LAST_PACKET, + NULL, 0); + gspca_frame_add(gspca_dev, FIRST_PACKET, + sd->jpeg_hdr, JPEG_HDR_SZ); + /* Strip the ff d8, our own header (which adds + huffman and quantization tables) already has this */ + len -= 2; + data += 2; + } + } else { + /* In UYVY mode an empty packet signals EOF */ + if (gspca_dev->empty_packet) { + gspca_frame_add(gspca_dev, LAST_PACKET, + NULL, 0); + gspca_frame_add(gspca_dev, FIRST_PACKET, + NULL, 0); + gspca_dev->empty_packet = 0; + } + } + gspca_frame_add(gspca_dev, INTER_PACKET, data, len); +} |