[PATCH] [media] gspca_touptek: Add support for ToupTek UCMOS series USB cameras
From: John McMaster
Date: Mon Sep 29 2014 - 01:23:58 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 | 829 +++++++++++++++++++++++++++++++++++++
3 files changed, 841 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 eed10d7..60af3b1 100644
--- a/drivers/media/usb/gspca/Kconfig
+++ b/drivers/media/usb/gspca/Kconfig
@@ -395,6 +395,16 @@ 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 f46975e..9f5ccec 100644
--- a/drivers/media/usb/gspca/Makefile
+++ b/drivers/media/usb/gspca/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_USB_GSPCA_STK1135) += gspca_stk1135.o
obj-$(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
@@ -86,6 +87,7 @@ 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..91458d5
--- /dev/null
+++ b/drivers/media/usb/gspca/touptek.c
@@ -0,0 +1,829 @@
+/*
+ * ToupTek UCMOS / AmScope MU series camera driver
+ * TODO: contrast with ScopeTek / AmScope MDC cameras
+ *
+ * Copyright (C) 2012-2014 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");
+
+/*
+Exposure reg 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
+*/
+
+/*
+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
+
+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
+
+Gain does not vary with resolution (checked 640x480 vs 1600x1200)
+
+
+Constant derivation:
+
+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
+
+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
+
+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
+
+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 *maybe* damage circuits
+limit the gain until have a reason to go higher
+*/
+#define GAIN_MAX 511
+
+/* Frame sync is a short read */
+#define BULK_SIZE 0x4000
+
+/* MT9E001 reg names to give a rough approximation */
+#define REG_COARSE_INTEGRATION_TIME_ 0x3012
+#define REG_GROUPED_PARAMETER_HOLD_ 0x3022
+#define REG_MODE_SELECT 0x0100
+#define REG_OP_SYS_CLK_DIV 0x030A
+#define REG_VT_SYS_CLK_DIV 0x0302
+#define REG_PRE_PLL_CLK_DIV 0x0304
+#define REG_VT_PIX_CLK_DIV 0x0300
+#define REG_OP_PIX_CLK_DIV 0x0308
+#define REG_PLL_MULTIPLIER 0x0306
+#define REG_COARSE_INTEGRATION_TIME_ 0x3012
+#define REG_FRAME_LENGTH_LINES 0x0340
+#define REG_FRAME_LENGTH_LINES_ 0x300A
+#define REG_GREEN1_GAIN 0x3056
+#define REG_GREEN2_GAIN 0x305C
+#define REG_GROUPED_PARAMETER_HOLD 0x0104
+#define REG_LINE_LENGTH_PCK_ 0x300C
+#define REG_MODE_SELECT 0x0100
+#define REG_PLL_MULTIPLIER 0x0306
+#define REG_READ_MODE 0x3040
+#define REG_BLUE_GAIN 0x3058
+#define REG_RED_GAIN 0x305A
+#define REG_RESET_REGISTER 0x301A
+#define REG_SCALE_M 0x0404
+#define REG_SCALING_MODE 0x0400
+#define REG_SOFTWARE_RESET 0x0103
+#define REG_X_ADDR_END 0x0348
+#define REG_X_ADDR_START 0x0344
+#define REG_X_ADDR_START 0x0344
+#define REG_X_OUTPUT_SIZE 0x034C
+#define REG_Y_ADDR_END 0x034A
+#define REG_Y_ADDR_START 0x0346
+#define REG_Y_OUTPUT_SIZE 0x034E
+
+
+/* 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
+ */
+ struct v4l2_ctrl *blue;
+ struct v4l2_ctrl *red;
+};
+
+/* 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("reg_w bReq=0x0B, bReqT=0xC0, wVal=0x%04X, wInd=0x%04X\n",
+ 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\n",
+ 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 setexposure(struct gspca_dev *gspca_dev, s32 val)
+{
+ int rc;
+ u16 value;
+ unsigned int w = gspca_dev->pixfmt.width;
+
+ if (w == 800)
+ value = val * 5;
+ else if (w == 1600)
+ value = val * 3;
+ else if (w == 3264)
+ value = val * 3 / 2;
+ else {
+ pr_devel("Invalid width %u\n", w);
+ return -EINVAL;
+ }
+ pr_devel("exposure: 0x%04X ms\n", value);
+ /* Wonder if theres a good reason for sending it twice */
+ /* probably not but leave it in because...why not */
+ rc = reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
+ if (rc)
+ return rc;
+
+ 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 setggain(struct gspca_dev *gspca_dev, u16 global_gain)
+{
+ u16 normalized;
+ int rc;
+
+ normalized = gainify(global_gain);
+ pr_devel("gain G1/G2 (0x%04X): 0x%04X (src 0x%04X)\n",
+ REG_GREEN1_GAIN,
+ normalized, global_gain);
+
+ rc = reg_w(gspca_dev, normalized, REG_GREEN1_GAIN);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, normalized, REG_GREEN2_GAIN);
+ if (rc)
+ return rc;
+ return 0;
+}
+
+static int setbgain(struct gspca_dev *gspca_dev,
+ u16 gain, u16 global_gain)
+{
+ u16 normalized;
+ int rc;
+
+ normalized = global_gain +
+ ((uint32_t)global_gain) * gain / GAIN_MAX;
+ if (normalized > GAIN_MAX) {
+ pr_devel("Truncating blue 0x%04X w/ value 0x%04X\n",
+ GAIN_MAX, normalized);
+ normalized = GAIN_MAX;
+ }
+ normalized = gainify(normalized);
+ pr_devel("gain B (0x%04X): 0x%04X w/ source 0x%04X\n",
+ REG_BLUE_GAIN, normalized, gain);
+
+ rc = reg_w(gspca_dev, normalized, REG_BLUE_GAIN);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int setrgain(struct gspca_dev *gspca_dev,
+ u16 gain, u16 global_gain)
+{
+ u16 normalized;
+ int rc;
+
+ normalized = global_gain +
+ ((uint32_t)global_gain) * gain / GAIN_MAX;
+ if (normalized > GAIN_MAX) {
+ pr_devel("Truncating gain 0x%04X w/ value 0x%04X\n",
+ GAIN_MAX, normalized);
+ normalized = GAIN_MAX;
+ }
+ normalized = gainify(normalized);
+ pr_devel("gain R (0x%04X): 0x%04X w / source 0x%04X\n",
+ REG_RED_GAIN, normalized, gain);
+
+ rc = reg_w(gspca_dev, normalized, REG_RED_GAIN);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int configure_wh(struct gspca_dev *gspca_dev)
+{
+ unsigned int rc;
+ int w = gspca_dev->pixfmt.width;
+
+ pr_devel("configure_wh\n");
+
+ if (w == 800) {
+ static const struct cmd reg_init_res[] = {
+ {0x0060, REG_X_ADDR_START},
+ {0x0CD9, REG_X_ADDR_END},
+ {0x0036, REG_Y_ADDR_START},
+ {0x098F, REG_Y_ADDR_END},
+ {0x07C7, REG_READ_MODE},
+ };
+
+ 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, REG_X_ADDR_START},
+ {0x0D19, REG_X_ADDR_END},
+ {0x0068, REG_Y_ADDR_START},
+ {0x09C5, REG_Y_ADDR_END},
+ {0x06C3, REG_READ_MODE},
+ };
+
+ 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, REG_X_ADDR_START},
+ {0x0DA7, REG_X_ADDR_END},
+ {0x009E, REG_Y_ADDR_START},
+ {0x0A2D, REG_Y_ADDR_END},
+ {0x0241, REG_READ_MODE},
+ };
+
+ 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\n", w);
+ return -EINVAL;
+ }
+
+ rc = reg_w(gspca_dev, 0x0000, REG_SCALING_MODE);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0010, REG_SCALE_M);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, w, REG_X_OUTPUT_SIZE);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, gspca_dev->pixfmt.height, REG_Y_OUTPUT_SIZE);
+ if (rc)
+ return rc;
+
+ if (w == 800) {
+ rc = reg_w(gspca_dev, 0x0384, REG_FRAME_LENGTH_LINES_);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0960, REG_LINE_LENGTH_PCK_);
+ if (rc)
+ return rc;
+ } else if (w == 1600) {
+ rc = reg_w(gspca_dev, 0x0640, REG_FRAME_LENGTH_LINES_);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x0FA0, REG_LINE_LENGTH_PCK_);
+ if (rc)
+ return rc;
+ } else if (w == 3264) {
+ rc = reg_w(gspca_dev, 0x0B4B, REG_FRAME_LENGTH_LINES_);
+ if (rc)
+ return rc;
+ rc = reg_w(gspca_dev, 0x1F40, REG_LINE_LENGTH_PCK_);
+ if (rc)
+ return rc;
+ } else {
+ pr_devel("bad width %u\n", 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)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ unsigned int rc;
+ u16 global_gain;
+ static const struct cmd reg_init_begin[] = {
+ {0x0100, REG_SOFTWARE_RESET},
+ {0x0000, REG_MODE_SELECT},
+ {0x0100, REG_GROUPED_PARAMETER_HOLD},
+ {0x0004, REG_VT_PIX_CLK_DIV},
+ {0x0001, REG_VT_SYS_CLK_DIV},
+ {0x0008, REG_OP_PIX_CLK_DIV},
+ {0x0001, REG_OP_SYS_CLK_DIV},
+ {0x0004, REG_PRE_PLL_CLK_DIV},
+ {0x0040, REG_PLL_MULTIPLIER},
+ {0x0000, REG_GROUPED_PARAMETER_HOLD},
+ {0x0100, REG_GROUPED_PARAMETER_HOLD},
+ };
+ static const struct cmd reg_init_end[] = {
+ {0x0000, REG_GROUPED_PARAMETER_HOLD},
+ {0x0301, 0x31AE},
+ {0x0805, 0x3064},
+ {0x0071, 0x3170},
+ {0x10DE, REG_RESET_REGISTER},
+ {0x0000, REG_MODE_SELECT},
+ {0x0010, REG_PLL_MULTIPLIER},
+ {0x0100, REG_MODE_SELECT},
+ };
+
+ pr_devel("Encrypted begin, w = %u\n", gspca_dev->pixfmt.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\n");
+ rc = setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure));
+ if (rc) {
+ pr_devel("Failed to set exposure\n");
+ return rc;
+ }
+
+ rc = reg_w(gspca_dev, 0x0100, REG_GROUPED_PARAMETER_HOLD);
+ if (rc)
+ return rc;
+
+ /* XXX: seems done automaticly, should rmeove? */
+ pr_devel("setting gain\n");
+ global_gain = v4l2_ctrl_g_ctrl(gspca_dev->gain);
+ rc = setggain(gspca_dev, global_gain);
+ if (rc) {
+ pr_devel("Failed to set green gain\n");
+ return rc;
+ }
+ rc = setbgain(gspca_dev, v4l2_ctrl_g_ctrl(sd->blue), global_gain);
+ if (rc) {
+ pr_devel("Failed to set blue gain\n");
+ return rc;
+ }
+ rc = setrgain(gspca_dev, v4l2_ctrl_g_ctrl(sd->red), global_gain);
+ if (rc) {
+ pr_devel("Failed to set red gain\n");
+ return rc;
+ }
+
+ rc = reg_w(gspca_dev, 0x0000, REG_GROUPED_PARAMETER_HOLD);
+ if (rc)
+ return rc;
+
+ pr_devel("Encrypted end\n");
+ return 0;
+}
+
+static int configure(struct gspca_dev *gspca_dev)
+{
+ uint8_t buff[4];
+ unsigned int rc;
+
+ pr_devel("configure()\n");
+
+ /*
+ 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
+ evidence suggests its an Atmel I2C crypto part but nobody cares to look
+ (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\n");
+ return 0;
+}
+
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ pr_devel("sd_config start\n");
+ gspca_dev->cam.cam_mode = vga_mode;
+ gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
+ pr_devel("cam modes size: %d\n", gspca_dev->cam.nmodes);
+
+ pr_devel("Input flags: 0x%08X\n", 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\n", MAX_NURBS);
+ gspca_dev->cam.bulk_nurbs = 4;
+ /* Largest size the windows driver uses */
+ gspca_dev->cam.bulk_size = BULK_SIZE;
+ /* Def need to use bulk transfers */
+ gspca_dev->cam.bulk = 1;
+
+ pr_devel("sd_config end\n");
+ return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int rc;
+
+ pr_devel("sd_start()\n");
+ 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? */
+ pr_devel("sd_start() end, status %d\n", 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 = (struct sd *) gspca_dev;
+
+ if (len != BULK_SIZE) {
+ /* can we finish a frame? */
+ if (sd->this_f + len == gspca_dev->pixfmt.sizeimage) {
+ gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
+ pr_devel("finish frame sz %u/%u w/ len %u\n",
+ sd->this_f, gspca_dev->pixfmt.sizeimage, len);
+ /* lost some data, discard the frame */
+ } else {
+ gspca_frame_add(gspca_dev, DISCARD_PACKET, NULL, 0);
+ pr_devel("abort frame sz %u/%u w/ len %u\n",
+ sd->this_f, gspca_dev->pixfmt.sizeimage, len);
+ }
+ sd->this_f = 0;
+ } else {
+ 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)
+{
+ return 0;
+}
+
+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 (!gspca_dev->streaming)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ setexposure(gspca_dev, ctrl->val);
+ break;
+ case V4L2_CID_GAIN:
+ /* gspca_dev->gain automatically updated */
+ setggain(gspca_dev, gspca_dev->gain->val);
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ sd->blue->val = ctrl->val;
+ setbgain(gspca_dev, sd->blue->val, gspca_dev->gain->val);
+ break;
+ case V4L2_CID_RED_BALANCE:
+ sd->red->val = ctrl->val;
+ setrgain(gspca_dev, sd->red->val, gspca_dev->gain->val);
+ break;
+ }
+ return gspca_dev->usb_err;
+}
+
+static const struct v4l2_ctrl_ops sd_ctrl_ops = {
+ .s_ctrl = sd_s_ctrl,
+};
+
+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);
+
+ gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ /* Mostly limited by URB timeouts */
+ /* XXX: make dynamic based on frame rate? */
+ V4L2_CID_EXPOSURE, 0, 800, 1, 350);
+ gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_GAIN, 0, 511, 1, 128);
+ sd->blue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_BLUE_BALANCE, 0, 511, 1, 80);
+ sd->red = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_RED_BALANCE, 0, 511, 1, 295);
+
+ if (hdl->error) {
+ pr_err("Could not initialize controls\n");
+ return hdl->error;
+ }
+ return 0;
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .config = sd_config,
+ .config = sd_config,
+ .init = sd_init,
+ .init_controls = sd_init_controls,
+ .start = sd_start,
+ .pkt_scan = sd_pkt_scan,
+};
+
+
+/* Table of supported USB devices */
+/* XXX: should add the untested devices? */
+static const struct usb_device_id device_table[] = {
+ { USB_DEVICE(0x0547, 0x6801) }, /* UCMOS08000KPB, MT9E001 */
+ { }
+};
+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()\n");
+ rc = gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+ THIS_MODULE);
+ pr_devel("sd_probe() rc %d\n", 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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