[PATCH] [media] gspca_touptek: Add support for ToupTek UCMOS series USB cameras
From: John McMaster
Date: Sun Mar 31 2013 - 20:55:59 EST
Adds support for AmScope MU800 / ToupTek UCMOS08000KPB USB microscope camera.
Signed-off-by: John McMaster <johndmcmaster@xxxxxxxxx>
---
drivers/media/usb/gspca/Kconfig | 10 +
drivers/media/usb/gspca/Makefile | 2 +
drivers/media/usb/gspca/touptek.c | 857 +++++++++++++++++++++++++++++++++++++
3 files changed, 869 insertions(+)
create mode 100644 drivers/media/usb/gspca/touptek.c
diff --git a/drivers/media/usb/gspca/Kconfig b/drivers/media/usb/gspca/Kconfig
index 6345f93..113f181 100644
--- a/drivers/media/usb/gspca/Kconfig
+++ b/drivers/media/usb/gspca/Kconfig
@@ -376,6 +376,16 @@ config USB_GSPCA_TOPRO
To compile this driver as a module, choose M here: the
module will be called gspca_topro.
+config USB_GSPCA_TOUPTEK
+ tristate "Touptek USB Camera Driver"
+ depends on VIDEO_V4L2 && USB_GSPCA
+ help
+ Say Y here if you want support for cameras based on the ToupTek UCMOS
+ / AmScope MU series camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gspca_touptek.
+
config USB_GSPCA_TV8532
tristate "TV8532 USB Camera Driver"
depends on VIDEO_V4L2 && USB_GSPCA
diff --git a/drivers/media/usb/gspca/Makefile b/drivers/media/usb/gspca/Makefile
index c901da0..5f18e7f 100644
--- a/drivers/media/usb/gspca/Makefile
+++ b/drivers/media/usb/gspca/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_USB_GSPCA_STK014) += gspca_stk014.o
obj-$(CONFIG_USB_GSPCA_STV0680) += gspca_stv0680.o
obj-$(CONFIG_USB_GSPCA_T613) += gspca_t613.o
obj-$(CONFIG_USB_GSPCA_TOPRO) += gspca_topro.o
+obj-$(CONFIG_USB_GSPCA_TOUPTEK) += gspca_touptek.o
obj-$(CONFIG_USB_GSPCA_TV8532) += gspca_tv8532.o
obj-$(CONFIG_USB_GSPCA_VC032X) += gspca_vc032x.o
obj-$(CONFIG_USB_GSPCA_VICAM) += gspca_vicam.o
@@ -82,6 +83,7 @@ gspca_stv0680-objs := stv0680.o
gspca_sunplus-objs := sunplus.o
gspca_t613-objs := t613.o
gspca_topro-objs := topro.o
+gspca_touptek-objs := touptek.o
gspca_tv8532-objs := tv8532.o
gspca_vc032x-objs := vc032x.o
gspca_vicam-objs := vicam.o
diff --git a/drivers/media/usb/gspca/touptek.c b/drivers/media/usb/gspca/touptek.c
new file mode 100644
index 0000000..9ce31f0
--- /dev/null
+++ b/drivers/media/usb/gspca/touptek.c
@@ -0,0 +1,857 @@
+/*
+ * ToupTek UCMOS / AmScope MU series camera driver
+ * TODO: contrast with ScopeTek / AmScope MDC cameras
+ *
+ * Copyright (C) 2012 John McMaster <JohnDMcMaster@xxxxxxxxx>
+ *
+ * Special thanks to Bushing for helping with the decrypt algorithm and
+ * Sean O'Sullivan / the Rensselaer Center for Open Source
+ * Software (RCOS) for helping me learn kernel development
+ *
+ * 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
+ */
+
+#include "gspca.h"
+
+#define MODULE_NAME "touptek"
+
+MODULE_AUTHOR("John McMaster");
+MODULE_DESCRIPTION("ToupTek UCMOS / Amscope MU microscope camera driver");
+MODULE_LICENSE("GPL");
+
+/*
+Register value is linear with exposure time
+Exposure (sec), E (reg)
+0.000400, 0x0002
+0.001000, 0x0005
+0.005000, 0x0019
+0.020000, 0x0064
+0.080000, 0x0190
+0.400000, 0x07D0
+1.000000, 0x1388
+2.000000, 0x2710
+*/
+#define INDEX_EXPOSURE 0x3012
+#define INDEX_WIDTH 0x034C
+#define INDEX_HEIGHT 0x034E
+
+/*
+Gain does not vary with resolution (checked 640x480 vs 1600x1200)
+Range 0x1000 (nothing) to 0x11FF (highest)
+However, there appear to be gaps
+
+Suspect three gain stages
+0x1000: master channel enable bit
+0x007F: low gain bits
+0x0080: medium gain bit
+0x0100: high gain bit
+
+gain = enable * (1 + regH) * (1 + regM) * z * regL
+
+zR = 0.0069605943152454778
+ about 3/431 = 0.0069605568445475635
+zB = 0.0095695970695970703
+ about 6/627 = 0.0095693779904306216
+zG = 0.010889328063241107
+ about 6/551 = 0.010889292196007259
+about 10 bits for constant + 7 bits for value => at least 17 bit intermediate
+with 32 bit ints should be fine for overflow etc
+Essentially gains are in range 0-0x001FF
+
+However, V4L expects a main gain channel + R and B balance
+To keep things simple for now saturate the values of balance is too high/low
+This isn't really ideal but easy way to fit the Linux model
+
+Raw data:
+Gain, GTOP, B, R, GBOT
+1.00, 0x105C, 0x1068, 0x10C8, 0x105C
+1.20, 0x106E, 0x107E, 0x10D6, 0x106E
+1.40, 0x10C0, 0x10CA, 0x10E5, 0x10C0
+1.60, 0x10C9, 0x10D4, 0x10F3, 0x10C9
+1.80, 0x10D2, 0x10DE, 0x11C1, 0x10D2
+2.00, 0x10DC, 0x10E9, 0x11C8, 0x10DC
+2.20, 0x10E5, 0x10F3, 0x11CF, 0x10E5
+2.40, 0x10EE, 0x10FE, 0x11D7, 0x10EE
+2.60, 0x10F7, 0x11C4, 0x11DE, 0x10F7
+2.80, 0x11C0, 0x11CA, 0x11E5, 0x11C0
+3.00, 0x11C5, 0x11CF, 0x11ED, 0x11C5
+
+Converted using gain model turns out to be quite linear:
+Gain, GTOP, B, R, GBOT
+1.00, 92, 104, 144, 92
+1.20, 110, 126, 172, 110
+1.40, 128, 148, 202, 128
+1.60, 146, 168, 230, 146
+1.80, 164, 188, 260, 164
+2.00, 184, 210, 288, 184
+2.20, 202, 230, 316, 202
+2.40, 220, 252, 348, 220
+2.60, 238, 272, 376, 238
+2.80, 256, 296, 404, 256
+3.00, 276, 316, 436, 276
+*/
+#define GAIN_BASE 0x1000
+/*
+Maximum gain is 0x7FF * 2 * 2 => 0x1FFC (8188)
+or about 13 effective bits of gain
+The highest the commercial driver goes in my setup 436
+However, because could potentially damage circuits
+limit the gain until have a reason to go higher
+*/
+#define GAIN_MAX 511
+#define BAL_MAX 511
+#define INDEX_GAIN_GTOP 0x3056
+#define INDEX_GAIN_B 0x3058
+#define INDEX_GAIN_R 0x305A
+#define INDEX_GAIN_GBOT 0x305C
+
+#define EXPOSURE_DEFAULT 350
+/*
+Gain implementation
+Goal: simple conversion for default gain at 1.00
+Want to do something similar to mt9v011.c's set_balance
+Problem: can lead to gains higher than possible
+When this happens the gain is clipped and a debug warning is emitted
+
+green_gain = sd->global_gain
+blue_gain = sd->global_gain +
+ ((uint32_t)sd->global_gain) * sd->blue_bal / GAIN_MAX;
+red_gain = sd->global_gain +
+ ((uint32_t)sd->global_gain) * sd->blue_bal / GAIN_MAX;
+
+Want initial gain of 1.4 (since it works well for me ;) ):
+-G: 128 => global_gain = 128
+-B: 148 => blue_bal = 80
+ 148 = 128 + 128 * blue_bal / 511
+-R: 202 => red_bal = 295
+ 202 = 128 + 128 * red_bal / 511
+*/
+#define GAIN_DEFAULT 128
+#define BLUE_DEFAULT 80
+#define RED_DEFAULT 295
+
+/* specific webcam descriptor */
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+ /* How many bytes this frame */
+ unsigned int this_f;
+
+ /*
+ Device has separate gains for each Bayer quadrant
+ V4L supports master gain which is referenced to G1/G2 and supplies
+ individual balance controls for R/B
+ */
+ u16 global_gain, red_bal, blue_bal;
+ /* In ms */
+ unsigned int exposure;
+};
+
+/* Used to simplify reg write error handling */
+struct cmd {
+ u16 value;
+ u16 index;
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+ {800, 600,
+ V4L2_PIX_FMT_SGRBG8,
+ V4L2_FIELD_NONE,
+ .bytesperline = 800,
+ .sizeimage = 800 * 600,
+ .colorspace = V4L2_COLORSPACE_SRGB},
+ {1600, 1200,
+ V4L2_PIX_FMT_SGRBG8,
+ V4L2_FIELD_NONE,
+ .bytesperline = 1600,
+ .sizeimage = 1600 * 1200,
+ .colorspace = V4L2_COLORSPACE_SRGB},
+ {3264, 2448,
+ V4L2_PIX_FMT_SGRBG8,
+ V4L2_FIELD_NONE,
+ .bytesperline = 3264,
+ .sizeimage = 3264 * 2448,
+ .colorspace = V4L2_COLORSPACE_SRGB},
+};
+
+/*
+As theres no (known) frame sync, the only way to keep synced is to try hard
+to never miss any packets
+*/
+#if MAX_NURBS < 4
+#error "Not enough URBs in the gspca table"
+#endif
+
+static int val_reply(const char *reply, int rc)
+{
+ if (rc < 0) {
+ pr_warn("reply has error %d", rc);
+ return -EIO;
+ }
+ if (rc != 1) {
+ pr_warn("Bad reply size %d", rc);
+ return -EIO;
+ }
+ if (reply[0] != 0x08) {
+ pr_warn("Bad reply 0x%02X", reply[0]);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
+{
+ char buff[1];
+ int rc;
+
+ pr_devel("bReq=0x0B, bReqT=0xC0, wVal=0x%04X, wInd=0x%04X",
+ value, index);
+ rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+ 0x0B, 0xC0, value, index, buff, 1, 500);
+ pr_devel("rc=%d, ret={0x%02X}", rc, buff[0]);
+ if (rc < 0) {
+ pr_warn("Failed reg_w(0x0B, 0xC0, 0x%04X, 0x%04X) w/ rc %d",
+ value, index, rc);
+ return rc;
+ }
+ if (val_reply(buff, rc)) {
+ pr_warn("Bad reply to reg_w(0x0B, 0xC0, 0x%04X, 0x%04X\n",
+ value, index);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int reg_w_buf(struct gspca_dev *gspca_dev,
+ const struct cmd *p, int l)
+{
+ do {
+ int rc = reg_w(gspca_dev, p->value, p->index);
+
+ if (rc < 0)
+ return rc;
+ p++;
+ } while (--l > 0);
+ return 0;
+}
+
+static int sd_getexposure(struct gspca_dev *gspca_dev, s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ *val = sd->exposure;
+ return 0;
+}
+
+static int set_exposure(struct gspca_dev *gspca_dev)
+{
+ int rc;
+ struct sd *sd = container_of(gspca_dev, struct sd, gspca_dev);
+ uint16_t value;
+ unsigned int w = gspca_dev->cam.cam_mode->width;
+
+ if (w == 800)
+ value = sd->exposure * 5;
+ else if (w == 1600)
+ value = sd->exposure * 3;
+ else if (w == 3264)
+ value = sd->exposure * 3 / 2;
+ else {
+ pr_devel("Invalid width %u", w);
+ return -EINVAL;
+ }
+ pr_devel("exposure: 0x%04X", value);
+ /* Wonder if theres a good reason for sending it twice */
+ rc = reg_w(gspca_dev, value, INDEX_EXPOSURE);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, value, INDEX_EXPOSURE);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int sd_setexposure(struct gspca_dev *gspca_dev, s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->exposure = val;
+ if (gspca_dev->streaming)
+ return set_exposure(gspca_dev);
+ return 0;
+}
+
+
+static int gainify(int in)
+{
+ /*
+ TODO: check if there are any issues with corner cases
+ 0x000 (0):0x07F (127): regL
+ 0x080 (128) - 0x0FF (255): regM, regL
+ 0x100 (256) - max: regH, regM, regL
+ */
+ if (in <= 0x7F)
+ return 0x1000 | in;
+ else if (in <= 0xFF)
+ return 0x1080 | in / 2;
+ else
+ return 0x1180 | in / 4;
+}
+
+static int set_gain(struct gspca_dev *gspca_dev, int set)
+{
+ struct sd *sd = container_of(gspca_dev, struct sd, gspca_dev);
+ u16 green_gain, blue_gain, red_gain;
+ int rc;
+
+ green_gain = gainify(sd->global_gain);
+ pr_devel("gain G1/G2 (0x%04X): 0x%04X (src 0x%04X, def: 0x%04X)",
+ INDEX_GAIN_GTOP,
+ green_gain, sd->global_gain, GAIN_DEFAULT);
+
+ blue_gain = sd->global_gain +
+ ((uint32_t)sd->global_gain) * sd->blue_bal / GAIN_MAX;
+ if (blue_gain > GAIN_MAX) {
+ pr_devel("Truncating blue 0x%04X w/ value 0x%04X",
+ GAIN_MAX, blue_gain);
+ blue_gain = GAIN_MAX;
+ }
+ blue_gain = gainify(blue_gain);
+ pr_devel("gain B (0x%04X): 0x%04X w/ source 0x%04X, default 0x%04X",
+ INDEX_GAIN_B, blue_gain, sd->blue_bal, BLUE_DEFAULT);
+
+ red_gain = sd->global_gain +
+ ((uint32_t)sd->global_gain) * sd->red_bal / GAIN_MAX;
+ if (red_gain > GAIN_MAX) {
+ pr_devel("Truncating gain 0x%04X w/ value 0x%04X",
+ GAIN_MAX, red_gain);
+ red_gain = GAIN_MAX;
+ }
+ red_gain = gainify(red_gain);
+ pr_devel("gain R (0x%04X): 0x%04X w / source 0x%04X, default 0x%04X",
+ INDEX_GAIN_R, red_gain, sd->red_bal, RED_DEFAULT);
+
+ if (set) {
+ rc = reg_w(gspca_dev, green_gain, INDEX_GAIN_GTOP);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, blue_gain, INDEX_GAIN_B);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, red_gain, INDEX_GAIN_R);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, green_gain, INDEX_GAIN_GBOT);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static int sd_setgain(struct gspca_dev *gspca_dev, s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->global_gain = val;
+ if (gspca_dev->streaming)
+ return set_gain(gspca_dev, 1);
+ return 0;
+}
+
+static int sd_getgain(struct gspca_dev *gspca_dev, s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ *val = sd->global_gain;
+ return 0;
+}
+
+static int sd_setredbalance(struct gspca_dev *gspca_dev, s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->red_bal = val;
+ if (gspca_dev->streaming)
+ return set_gain(gspca_dev, 1);
+ return 0;
+}
+
+static int sd_getredbalance(struct gspca_dev *gspca_dev, s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ *val = sd->red_bal;
+ return 0;
+}
+
+static int sd_setbluebalance(struct gspca_dev *gspca_dev, s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->blue_bal = val;
+ if (gspca_dev->streaming)
+ return set_gain(gspca_dev, 1);
+ return 0;
+}
+
+static int sd_getbluebalance(struct gspca_dev *gspca_dev, s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ *val = sd->blue_bal;
+ return 0;
+}
+
+static int configure_wh(struct gspca_dev *gspca_dev)
+{
+ unsigned int rc;
+ int w = gspca_dev->cam.cam_mode->width;
+
+ if (w == 800) {
+ static const struct cmd reg_init_res[] = {
+ {0x0060, 0x0344},
+ {0x0CD9, 0x0348},
+ {0x0036, 0x0346},
+ {0x098F, 0x034A},
+ {0x07C7, 0x3040},
+ };
+
+ rc = reg_w_buf(gspca_dev,
+ reg_init_res, ARRAY_SIZE(reg_init_res));
+ if (rc < 0)
+ return rc;
+ } else if (w == 1600) {
+ static const struct cmd reg_init_res[] = {
+ {0x009C, 0x0344},
+ {0x0D19, 0x0348},
+ {0x0068, 0x0346},
+ {0x09C5, 0x034A},
+ {0x06C3, 0x3040},
+ };
+
+ rc = reg_w_buf(gspca_dev,
+ reg_init_res, ARRAY_SIZE(reg_init_res));
+ if (rc < 0)
+ return rc;
+ } else if (w == 3264) {
+ static const struct cmd reg_init_res[] = {
+ {0x00E8, 0x0344},
+ {0x0DA7, 0x0348},
+ {0x009E, 0x0346},
+ {0x0A2D, 0x034A},
+ {0x0241, 0x3040},
+ };
+
+ rc = reg_w_buf(gspca_dev,
+ reg_init_res, ARRAY_SIZE(reg_init_res));
+ if (rc < 0)
+ return rc;
+ } else {
+ pr_devel("bad width %u", w);
+ return -EINVAL;
+ }
+
+ rc = reg_w(gspca_dev, 0x0000, 0x0400);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0010, 0x0404);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, w, INDEX_WIDTH);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, gspca_dev->cam.cam_mode->height, INDEX_HEIGHT);
+ if (rc)
+ return rc;
+
+ if (w == 800) {
+ rc = reg_w(gspca_dev, 0x0384, 0x300A);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0960, 0x300C);
+ if (rc)
+ return rc;
+ } else if (w == 1600) {
+ rc = reg_w(gspca_dev, 0x0640, 0x300A);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0FA0, 0x300C);
+ if (rc)
+ return rc;
+ } else if (w == 3264) {
+ rc = reg_w(gspca_dev, 0x0B4B, 0x300A);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x1F40, 0x300C);
+ if (rc)
+ return rc;
+ } else {
+ pr_devel("bad width %u", w);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Packets that were encrypted, no idea if the grouping is significant */
+static int configure_encrypted(struct gspca_dev *gspca_dev)
+{
+ unsigned int rc;
+ static const struct cmd reg_init_begin[] = {
+ {0x0100, 0x0103},
+ {0x0000, 0x0100},
+ {0x0100, 0x0104},
+ {0x0004, 0x0300},
+ {0x0001, 0x0302},
+ {0x0008, 0x0308},
+ {0x0001, 0x030A},
+ {0x0004, 0x0304},
+ {0x0040, 0x0306},
+ {0x0000, 0x0104},
+ {0x0100, 0x0104},
+ };
+ static const struct cmd reg_init_end[] = {
+ {0x0000, 0x0104},
+ {0x0301, 0x31AE},
+ {0x0805, 0x3064},
+ {0x0071, 0x3170},
+ {0x10DE, 0x301A},
+ {0x0000, 0x0100},
+ {0x0010, 0x0306},
+ {0x0100, 0x0100},
+ };
+
+ pr_devel("Encrypted begin, w = %u", gspca_dev->cam.cam_mode->width);
+ rc = reg_w_buf(gspca_dev, reg_init_begin, ARRAY_SIZE(reg_init_begin));
+ if (rc < 0)
+ return rc;
+ rc = configure_wh(gspca_dev);
+ if (rc < 0)
+ return rc;
+ rc = reg_w_buf(gspca_dev, reg_init_end, ARRAY_SIZE(reg_init_end));
+ if (rc < 0)
+ return rc;
+
+ pr_devel("Setting exposure");
+ rc = set_exposure(gspca_dev);
+ if (rc) {
+ pr_devel("Failed to set exposure");
+ return rc;
+ }
+
+ rc = reg_w(gspca_dev, 0x0100, 0x0104);
+ if (rc)
+ return rc;
+
+ pr_devel("Setting gain");
+ rc = set_gain(gspca_dev, 1);
+ if (rc) {
+ pr_devel("Failed to set gain");
+ return rc;
+ }
+
+ rc = reg_w(gspca_dev, 0x0000, 0x0104);
+ if (rc)
+ return rc;
+
+ pr_devel("Encrypted end");
+ return 0;
+}
+
+static int configure(struct gspca_dev *gspca_dev)
+{
+ uint8_t buff[4];
+ unsigned int rc;
+
+ pr_devel("Beginning configure");
+
+ /*
+ First driver sets a sort of encryption key
+ A number of futur requests of this type have wValue and wIndex encrypted
+ as follows:
+ -Compute key = this wValue rotate left by 4 bits
+ (decrypt.py rotates right because we are decrypting)
+ -Later packets encrypt packets by XOR'ing with key
+ XOR encrypt/decrypt is symmetrical
+ wValue, and wIndex are encrypted
+ bRequest is not and bRequestType is always 0xC0
+ This allows resyncing if key is unknown?
+ By setting 0 we XOR with 0 and the shifting and XOR drops out
+ */
+ rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+ 0x16, 0xC0, 0x0000, 0x0000, buff, 2, 500);
+ if (val_reply(buff, rc)) {
+ pr_warn("failed key req");
+ return -EIO;
+ }
+
+ /*
+ Next does some sort of 2 packet challenge / response
+ (to make sure its not cloned hardware?)
+ Ignore: I want to work with their hardware, not clone it
+ 16 bytes out challenge, requestType: 0x40
+ 16 bytes in response, requestType: 0xC0
+ */
+
+ rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
+ if (rc < 0) {
+ pr_warn("failed to replay packet 176 w/ rc %d\n", rc);
+ return rc;
+ }
+
+ rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0x01, 0x40, 0x0000, 0x000F, NULL, 0, 500);
+ if (rc < 0) {
+ pr_warn("failed to replay packet 178 w/ rc %d\n", rc);
+ return rc;
+ }
+
+ rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
+ if (rc < 0) {
+ pr_warn("failed to replay packet 180 w/ rc %d\n", rc);
+ return rc;
+ }
+
+ rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
+ 0x20, 0xC0, 0x0000, 0x0000, buff, 4, 500);
+ if (rc != 4 || memcmp((char[]){0xE6, 0x0D, 0x00, 0x00}, buff, 4)) {
+ pr_warn("failed to replay packet 182 w/ rc %d\n", rc);
+ if (rc < 0)
+ return rc;
+ return -EIO;
+ }
+
+ /* Large (EEPROM?) read, skip it since no idea what to do with it */
+
+ rc = configure_encrypted(gspca_dev);
+ if (rc)
+ return rc;
+
+ /* Omitted this by accident, does not work without it */
+ rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0x01, 0x40, 0x0003, 0x000F, NULL, 0, 500);
+
+ pr_devel("Configure complete");
+ return 0;
+}
+
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ pr_devel("sd_config start");
+ gspca_dev->cam.cam_mode = vga_mode;
+ gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
+ pr_devel("cam modes size: %d", gspca_dev->cam.nmodes);
+
+ pr_devel("Input flags: 0x%08X", gspca_dev->cam.input_flags);
+ /* Yes we want URBs and we want them now! */
+ gspca_dev->cam.no_urb_create = 0;
+ /*
+ TODO: considering increasing much higher
+ Without frame sync we need to make sure we never drop
+ */
+ pr_devel("Max nurbs: %d", MAX_NURBS);
+ gspca_dev->cam.bulk_nurbs = 4;
+ /* Largest size the windows driver uses */
+ gspca_dev->cam.bulk_size = 0x4000;
+ /* Def need to use bulk transfers */
+ gspca_dev->cam.bulk = 1;
+
+ pr_devel("sd_config end");
+ return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = container_of(gspca_dev, struct sd, gspca_dev);
+ int rc;
+
+ pr_devel("sd_start() begin");
+ sd->this_f = 0;
+
+ rc = configure(gspca_dev);
+ if (rc < 0) {
+ pr_warn("Failed configure");
+ return rc;
+ }
+ /* First two frames have messed up gains
+ Drop them to avoid special cases in user apps? */
+ rc = gspca_dev->cam.cam_mode->sizeimage;
+ if (rc < 0) {
+ pr_devel("Failed size");
+ return rc;
+ }
+
+ pr_devel("sd_start() end, status %d", gspca_dev->usb_err);
+ return gspca_dev->usb_err;
+}
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+ u8 *data, /* isoc packet */
+ int len) /* iso packet length */
+{
+ struct sd *sd = container_of(gspca_dev, struct sd, gspca_dev);
+ size_t frame_sz;
+
+ frame_sz = gspca_dev->cam.cam_mode->sizeimage;
+
+ /* can we finish a frame? */
+ if (sd->this_f + len >= frame_sz) {
+ unsigned int remainder = frame_sz - sd->this_f;
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ data, remainder);
+ len -= remainder;
+ data += remainder;
+ sd->this_f = 0;
+ }
+ /* in theory even if finished a frame could have part of next,
+ not sure if it ever happens though */
+ if (len > 0) {
+ if (sd->this_f == 0)
+ gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
+ else
+ gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+ sd->this_f += len;
+ }
+}
+
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = container_of(gspca_dev, struct sd, gspca_dev);
+
+ pr_devel("sd_init");
+ /* Setting at init allows one app to adjust and another take pictures */
+ sd->exposure = EXPOSURE_DEFAULT;
+ sd->global_gain = GAIN_DEFAULT;
+ sd->red_bal = RED_DEFAULT;
+ sd->blue_bal = BLUE_DEFAULT;
+
+ return 0;
+}
+
+static const struct ctrl sd_ctrls[] = {
+ {
+ {
+ .id = V4L2_CID_EXPOSURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Exposure",
+ .minimum = 0,
+ /* Mostly limited by URB timeouts */
+ .maximum = 800,
+ .step = 1,
+ .default_value = EXPOSURE_DEFAULT,
+ },
+ .set = sd_setexposure,
+ .get = sd_getexposure,
+ },
+ {
+ {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .maximum = GAIN_MAX,
+ .step = 1,
+ .default_value = GAIN_DEFAULT,
+ },
+ .set = sd_setgain,
+ .get = sd_getgain,
+ },
+ {
+ {
+ .id = V4L2_CID_BLUE_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue Balance",
+ .minimum = 0,
+ .maximum = BAL_MAX,
+ .step = 1,
+ .default_value = BLUE_DEFAULT,
+ },
+ .set = sd_setbluebalance,
+ .get = sd_getbluebalance,
+ },
+ {
+ {
+ .id = V4L2_CID_RED_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red Balance",
+ .minimum = 0,
+ .maximum = BAL_MAX,
+ .step = 1,
+ .default_value = RED_DEFAULT,
+ },
+ .set = sd_setredbalance,
+ .get = sd_getredbalance,
+ },
+};
+
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .ctrls = sd_ctrls,
+ .nctrls = ARRAY_SIZE(sd_ctrls),
+ .config = sd_config,
+ .init = sd_init,
+ .start = sd_start,
+ .pkt_scan = sd_pkt_scan,
+};
+
+/* TODO: should add the untested devices? */
+static const struct usb_device_id device_table[] = {
+ { USB_DEVICE(0x0547, 0x6801) }, /* UCMOS08000KPB */
+ { }
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+static int sd_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ int rc = 0;
+ pr_devel("sd_probe start, alt 0x%p", intf->cur_altsetting);
+ rc = gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+ THIS_MODULE);
+ pr_devel("sd_probe done, rc %d", rc);
+ return rc;
+}
+
+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,
+#endif
+};
+
+static int __init sd_mod_init(void)
+{
+ int ret;
+
+ ret = usb_register(&sd_driver);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+ usb_deregister(&sd_driver);
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);
+
--
1.7.9.5
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