--- /dev/null
+/***************************************************************************
+ * Video4Linux driver for W996[87]CF JPEG USB Dual Mode Camera Chip. *
+ * *
+ * Copyright (C) 2002-2004 by Luca Risolia <luca.risolia@studio.unibo.it> *
+ * *
+ * - Memory management code from bttv driver by Ralph Metzler, *
+ * Marcus Metzler and Gerd Knorr. *
+ * - I2C interface to kernel, high-level image sensor control routines and *
+ * some symbolic names from OV511 driver by Mark W. McClelland. *
+ * - Low-level I2C fast write function by Piotr Czerczak. *
+ * - Low-level I2C read function by Frederic Jouault. *
+ * *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA. *
+ ***************************************************************************/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kmod.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/ioctl.h>
+#include <linux/delay.h>
+#include <linux/stddef.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+#include <linux/page-flags.h>
+#include <linux/moduleparam.h>
+
+#include "w9968cf.h"
+#include "w9968cf_decoder.h"
+
+static struct w9968cf_vpp_t* w9968cf_vpp;
+static DECLARE_WAIT_QUEUE_HEAD(w9968cf_vppmod_wait);
+
+static LIST_HEAD(w9968cf_dev_list); /* head of V4L registered cameras list */
+static DEFINE_MUTEX(w9968cf_devlist_mutex); /* semaphore for list traversal */
+
+static DECLARE_RWSEM(w9968cf_disconnect); /* prevent races with open() */
+
+
+/****************************************************************************
+ * Module macros and parameters *
+ ****************************************************************************/
+
+MODULE_DEVICE_TABLE(usb, winbond_id_table);
+
+MODULE_AUTHOR(W9968CF_MODULE_AUTHOR" "W9968CF_AUTHOR_EMAIL);
+MODULE_DESCRIPTION(W9968CF_MODULE_NAME);
+MODULE_VERSION(W9968CF_MODULE_VERSION);
+MODULE_LICENSE(W9968CF_MODULE_LICENSE);
+MODULE_SUPPORTED_DEVICE("Video");
+
+static int ovmod_load = W9968CF_OVMOD_LOAD;
+static unsigned short simcams = W9968CF_SIMCAMS;
+static short video_nr[]={[0 ... W9968CF_MAX_DEVICES-1] = -1}; /*-1=first free*/
+static unsigned int packet_size[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_PACKET_SIZE};
+static unsigned short max_buffers[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_BUFFERS};
+static int double_buffer[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_DOUBLE_BUFFER};
+static int clamping[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLAMPING};
+static unsigned short filter_type[]= {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_FILTER_TYPE};
+static int largeview[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_LARGEVIEW};
+static unsigned short decompression[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_DECOMPRESSION};
+static int upscaling[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_UPSCALING};
+static unsigned short force_palette[] = {[0 ... W9968CF_MAX_DEVICES-1] = 0};
+static int force_rgb[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_FORCE_RGB};
+static int autobright[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOBRIGHT};
+static int autoexp[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOEXP};
+static unsigned short lightfreq[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_LIGHTFREQ};
+static int bandingfilter[] = {[0 ... W9968CF_MAX_DEVICES-1]=
+ W9968CF_BANDINGFILTER};
+static short clockdiv[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLOCKDIV};
+static int backlight[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_BACKLIGHT};
+static int mirror[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_MIRROR};
+static int monochrome[] = {[0 ... W9968CF_MAX_DEVICES-1]=W9968CF_MONOCHROME};
+static unsigned int brightness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_BRIGHTNESS};
+static unsigned int hue[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_HUE};
+static unsigned int colour[]={[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_COLOUR};
+static unsigned int contrast[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_CONTRAST};
+static unsigned int whiteness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
+ W9968CF_WHITENESS};
+#ifdef W9968CF_DEBUG
+static unsigned short debug = W9968CF_DEBUG_LEVEL;
+static int specific_debug = W9968CF_SPECIFIC_DEBUG;
+#endif
+
+static unsigned int param_nv[24]; /* number of values per parameter */
+
+#ifdef CONFIG_KMOD
+module_param(ovmod_load, bool, 0644);
+#endif
+module_param(simcams, ushort, 0644);
+module_param_array(video_nr, short, ¶m_nv[0], 0444);
+module_param_array(packet_size, uint, ¶m_nv[1], 0444);
+module_param_array(max_buffers, ushort, ¶m_nv[2], 0444);
+module_param_array(double_buffer, bool, ¶m_nv[3], 0444);
+module_param_array(clamping, bool, ¶m_nv[4], 0444);
+module_param_array(filter_type, ushort, ¶m_nv[5], 0444);
+module_param_array(largeview, bool, ¶m_nv[6], 0444);
+module_param_array(decompression, ushort, ¶m_nv[7], 0444);
+module_param_array(upscaling, bool, ¶m_nv[8], 0444);
+module_param_array(force_palette, ushort, ¶m_nv[9], 0444);
+module_param_array(force_rgb, ushort, ¶m_nv[10], 0444);
+module_param_array(autobright, bool, ¶m_nv[11], 0444);
+module_param_array(autoexp, bool, ¶m_nv[12], 0444);
+module_param_array(lightfreq, ushort, ¶m_nv[13], 0444);
+module_param_array(bandingfilter, bool, ¶m_nv[14], 0444);
+module_param_array(clockdiv, short, ¶m_nv[15], 0444);
+module_param_array(backlight, bool, ¶m_nv[16], 0444);
+module_param_array(mirror, bool, ¶m_nv[17], 0444);
+module_param_array(monochrome, bool, ¶m_nv[18], 0444);
+module_param_array(brightness, uint, ¶m_nv[19], 0444);
+module_param_array(hue, uint, ¶m_nv[20], 0444);
+module_param_array(colour, uint, ¶m_nv[21], 0444);
+module_param_array(contrast, uint, ¶m_nv[22], 0444);
+module_param_array(whiteness, uint, ¶m_nv[23], 0444);
+#ifdef W9968CF_DEBUG
+module_param(debug, ushort, 0644);
+module_param(specific_debug, bool, 0644);
+#endif
+
+#ifdef CONFIG_KMOD
+MODULE_PARM_DESC(ovmod_load,
+ "\n<0|1> Automatic 'ovcamchip' module loading."
+ "\n0 disabled, 1 enabled."
+ "\nIf enabled,'insmod' searches for the required 'ovcamchip'"
+ "\nmodule in the system, according to its configuration, and"
+ "\nattempts to load that module automatically. This action is"
+ "\nperformed once as soon as the 'w9968cf' module is loaded"
+ "\ninto memory."
+ "\nDefault value is "__MODULE_STRING(W9968CF_OVMOD_LOAD)"."
+ "\n");
+#endif
+MODULE_PARM_DESC(simcams,
+ "\n<n> Number of cameras allowed to stream simultaneously."
+ "\nn may vary from 0 to "
+ __MODULE_STRING(W9968CF_MAX_DEVICES)"."
+ "\nDefault value is "__MODULE_STRING(W9968CF_SIMCAMS)"."
+ "\n");
+MODULE_PARM_DESC(video_nr,
+ "\n<-1|n[,...]> Specify V4L minor mode number."
+ "\n -1 = use next available (default)"
+ "\n n = use minor number n (integer >= 0)"
+ "\nYou can specify up to "__MODULE_STRING(W9968CF_MAX_DEVICES)
+ " cameras this way."
+ "\nFor example:"
+ "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
+ "\nthe second camera and use auto for the first"
+ "\none and for every other camera."
+ "\n");
+MODULE_PARM_DESC(packet_size,
+ "\n<n[,...]> Specify the maximum data payload"
+ "\nsize in bytes for alternate settings, for each device."
+ "\nn is scaled between 63 and 1023 "
+ "(default is "__MODULE_STRING(W9968CF_PACKET_SIZE)")."
+ "\n");
+MODULE_PARM_DESC(max_buffers,
+ "\n<n[,...]> For advanced users."
+ "\nSpecify the maximum number of video frame buffers"
+ "\nto allocate for each device, from 2 to "
+ __MODULE_STRING(W9968CF_MAX_BUFFERS)
+ ". (default is "__MODULE_STRING(W9968CF_BUFFERS)")."
+ "\n");
+MODULE_PARM_DESC(double_buffer,
+ "\n<0|1[,...]> "
+ "Hardware double buffering: 0 disabled, 1 enabled."
+ "\nIt should be enabled if you want smooth video output: if"
+ "\nyou obtain out of sync. video, disable it, or try to"
+ "\ndecrease the 'clockdiv' module parameter value."
+ "\nDefault value is "__MODULE_STRING(W9968CF_DOUBLE_BUFFER)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(clamping,
+ "\n<0|1[,...]> Video data clamping: 0 disabled, 1 enabled."
+ "\nDefault value is "__MODULE_STRING(W9968CF_CLAMPING)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(filter_type,
+ "\n<0|1|2[,...]> Video filter type."
+ "\n0 none, 1 (1-2-1) 3-tap filter, "
+ "2 (2-3-6-3-2) 5-tap filter."
+ "\nDefault value is "__MODULE_STRING(W9968CF_FILTER_TYPE)
+ " for every device."
+ "\nThe filter is used to reduce noise and aliasing artifacts"
+ "\nproduced by the CCD or CMOS image sensor, and the scaling"
+ " process."
+ "\n");
+MODULE_PARM_DESC(largeview,
+ "\n<0|1[,...]> Large view: 0 disabled, 1 enabled."
+ "\nDefault value is "__MODULE_STRING(W9968CF_LARGEVIEW)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(upscaling,
+ "\n<0|1[,...]> Software scaling (for non-compressed video):"
+ "\n0 disabled, 1 enabled."
+ "\nDisable it if you have a slow CPU or you don't have"
+ " enough memory."
+ "\nDefault value is "__MODULE_STRING(W9968CF_UPSCALING)
+ " for every device."
+ "\nIf 'w9968cf-vpp' is not present, this parameter is"
+ " set to 0."
+ "\n");
+MODULE_PARM_DESC(decompression,
+ "\n<0|1|2[,...]> Software video decompression:"
+ "\n- 0 disables decompression (doesn't allow formats needing"
+ " decompression)"
+ "\n- 1 forces decompression (allows formats needing"
+ " decompression only);"
+ "\n- 2 allows any permitted formats."
+ "\nFormats supporting compressed video are YUV422P and"
+ " YUV420P/YUV420 "
+ "\nin any resolutions where both width and height are "
+ "a multiple of 16."
+ "\nDefault value is "__MODULE_STRING(W9968CF_DECOMPRESSION)
+ " for every device."
+ "\nIf 'w9968cf-vpp' is not present, forcing decompression is "
+ "\nnot allowed; in this case this parameter is set to 2."
+ "\n");
+MODULE_PARM_DESC(force_palette,
+ "\n<0"
+ "|" __MODULE_STRING(VIDEO_PALETTE_UYVY)
+ "|" __MODULE_STRING(VIDEO_PALETTE_YUV420)
+ "|" __MODULE_STRING(VIDEO_PALETTE_YUV422P)
+ "|" __MODULE_STRING(VIDEO_PALETTE_YUV420P)
+ "|" __MODULE_STRING(VIDEO_PALETTE_YUYV)
+ "|" __MODULE_STRING(VIDEO_PALETTE_YUV422)
+ "|" __MODULE_STRING(VIDEO_PALETTE_GREY)
+ "|" __MODULE_STRING(VIDEO_PALETTE_RGB555)
+ "|" __MODULE_STRING(VIDEO_PALETTE_RGB565)
+ "|" __MODULE_STRING(VIDEO_PALETTE_RGB24)
+ "|" __MODULE_STRING(VIDEO_PALETTE_RGB32)
+ "[,...]>"
+ " Force picture palette."
+ "\nIn order:"
+ "\n- 0 allows any of the following formats:"
+ "\n- UYVY 16 bpp - Original video, compression disabled"
+ "\n- YUV420 12 bpp - Original video, compression enabled"
+ "\n- YUV422P 16 bpp - Original video, compression enabled"
+ "\n- YUV420P 12 bpp - Original video, compression enabled"
+ "\n- YUVY 16 bpp - Software conversion from UYVY"
+ "\n- YUV422 16 bpp - Software conversion from UYVY"
+ "\n- GREY 8 bpp - Software conversion from UYVY"
+ "\n- RGB555 16 bpp - Software conversion from UYVY"
+ "\n- RGB565 16 bpp - Software conversion from UYVY"
+ "\n- RGB24 24 bpp - Software conversion from UYVY"
+ "\n- RGB32 32 bpp - Software conversion from UYVY"
+ "\nWhen not 0, this parameter will override 'decompression'."
+ "\nDefault value is 0 for every device."
+ "\nInitial palette is "
+ __MODULE_STRING(W9968CF_PALETTE_DECOMP_ON)"."
+ "\nIf 'w9968cf-vpp' is not present, this parameter is"
+ " set to 9 (UYVY)."
+ "\n");
+MODULE_PARM_DESC(force_rgb,
+ "\n<0|1[,...]> Read RGB video data instead of BGR:"
+ "\n 1 = use RGB component ordering."
+ "\n 0 = use BGR component ordering."
+ "\nThis parameter has effect when using RGBX palettes only."
+ "\nDefault value is "__MODULE_STRING(W9968CF_FORCE_RGB)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(autobright,
+ "\n<0|1[,...]> Image sensor automatically changes brightness:"
+ "\n 0 = no, 1 = yes"
+ "\nDefault value is "__MODULE_STRING(W9968CF_AUTOBRIGHT)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(autoexp,
+ "\n<0|1[,...]> Image sensor automatically changes exposure:"
+ "\n 0 = no, 1 = yes"
+ "\nDefault value is "__MODULE_STRING(W9968CF_AUTOEXP)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(lightfreq,
+ "\n<50|60[,...]> Light frequency in Hz:"
+ "\n 50 for European and Asian lighting,"
+ " 60 for American lighting."
+ "\nDefault value is "__MODULE_STRING(W9968CF_LIGHTFREQ)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(bandingfilter,
+ "\n<0|1[,...]> Banding filter to reduce effects of"
+ " fluorescent lighting:"
+ "\n 0 disabled, 1 enabled."
+ "\nThis filter tries to reduce the pattern of horizontal"
+ "\nlight/dark bands caused by some (usually fluorescent)"
+ " lighting."
+ "\nDefault value is "__MODULE_STRING(W9968CF_BANDINGFILTER)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(clockdiv,
+ "\n<-1|n[,...]> "
+ "Force pixel clock divisor to a specific value (for experts):"
+ "\n n may vary from 0 to 127."
+ "\n -1 for automatic value."
+ "\nSee also the 'double_buffer' module parameter."
+ "\nDefault value is "__MODULE_STRING(W9968CF_CLOCKDIV)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(backlight,
+ "\n<0|1[,...]> Objects are lit from behind:"
+ "\n 0 = no, 1 = yes"
+ "\nDefault value is "__MODULE_STRING(W9968CF_BACKLIGHT)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(mirror,
+ "\n<0|1[,...]> Reverse image horizontally:"
+ "\n 0 = no, 1 = yes"
+ "\nDefault value is "__MODULE_STRING(W9968CF_MIRROR)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(monochrome,
+ "\n<0|1[,...]> Use image sensor as monochrome sensor:"
+ "\n 0 = no, 1 = yes"
+ "\nNot all the sensors support monochrome color."
+ "\nDefault value is "__MODULE_STRING(W9968CF_MONOCHROME)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(brightness,
+ "\n<n[,...]> Set picture brightness (0-65535)."
+ "\nDefault value is "__MODULE_STRING(W9968CF_BRIGHTNESS)
+ " for every device."
+ "\nThis parameter has no effect if 'autobright' is enabled."
+ "\n");
+MODULE_PARM_DESC(hue,
+ "\n<n[,...]> Set picture hue (0-65535)."
+ "\nDefault value is "__MODULE_STRING(W9968CF_HUE)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(colour,
+ "\n<n[,...]> Set picture saturation (0-65535)."
+ "\nDefault value is "__MODULE_STRING(W9968CF_COLOUR)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(contrast,
+ "\n<n[,...]> Set picture contrast (0-65535)."
+ "\nDefault value is "__MODULE_STRING(W9968CF_CONTRAST)
+ " for every device."
+ "\n");
+MODULE_PARM_DESC(whiteness,
+ "\n<n[,...]> Set picture whiteness (0-65535)."
+ "\nDefault value is "__MODULE_STRING(W9968CF_WHITENESS)
+ " for every device."
+ "\n");
+#ifdef W9968CF_DEBUG
+MODULE_PARM_DESC(debug,
+ "\n<n> Debugging information level, from 0 to 6:"
+ "\n0 = none (use carefully)"
+ "\n1 = critical errors"
+ "\n2 = significant informations"
+ "\n3 = configuration or general messages"
+ "\n4 = warnings"
+ "\n5 = called functions"
+ "\n6 = function internals"
+ "\nLevel 5 and 6 are useful for testing only, when only "
+ "one device is used."
+ "\nDefault value is "__MODULE_STRING(W9968CF_DEBUG_LEVEL)"."
+ "\n");
+MODULE_PARM_DESC(specific_debug,
+ "\n<0|1> Enable or disable specific debugging messages:"
+ "\n0 = print messages concerning every level"
+ " <= 'debug' level."
+ "\n1 = print messages concerning the level"
+ " indicated by 'debug'."
+ "\nDefault value is "
+ __MODULE_STRING(W9968CF_SPECIFIC_DEBUG)"."
+ "\n");
+#endif /* W9968CF_DEBUG */
+
+
+
+/****************************************************************************
+ * Some prototypes *
+ ****************************************************************************/
+
+/* Video4linux interface */
+static struct file_operations w9968cf_fops;
+static int w9968cf_open(struct inode*, struct file*);
+static int w9968cf_release(struct inode*, struct file*);
+static int w9968cf_mmap(struct file*, struct vm_area_struct*);
+static int w9968cf_ioctl(struct inode*, struct file*, unsigned, unsigned long);
+static ssize_t w9968cf_read(struct file*, char __user *, size_t, loff_t*);
+static int w9968cf_v4l_ioctl(struct inode*, struct file*, unsigned int,
+ void __user *);
+
+/* USB-specific */
+static int w9968cf_start_transfer(struct w9968cf_device*);
+static int w9968cf_stop_transfer(struct w9968cf_device*);
+static int w9968cf_write_reg(struct w9968cf_device*, u16 value, u16 index);
+static int w9968cf_read_reg(struct w9968cf_device*, u16 index);
+static int w9968cf_write_fsb(struct w9968cf_device*, u16* data);
+static int w9968cf_write_sb(struct w9968cf_device*, u16 value);
+static int w9968cf_read_sb(struct w9968cf_device*);
+static int w9968cf_upload_quantizationtables(struct w9968cf_device*);
+static void w9968cf_urb_complete(struct urb *urb, struct pt_regs *regs);
+
+/* Low-level I2C (SMBus) I/O */
+static int w9968cf_smbus_start(struct w9968cf_device*);
+static int w9968cf_smbus_stop(struct w9968cf_device*);
+static int w9968cf_smbus_write_byte(struct w9968cf_device*, u8 v);
+static int w9968cf_smbus_read_byte(struct w9968cf_device*, u8* v);
+static int w9968cf_smbus_write_ack(struct w9968cf_device*);
+static int w9968cf_smbus_read_ack(struct w9968cf_device*);
+static int w9968cf_smbus_refresh_bus(struct w9968cf_device*);
+static int w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
+ u16 address, u8* value);
+static int w9968cf_i2c_adap_read_byte_data(struct w9968cf_device*, u16 address,
+ u8 subaddress, u8* value);
+static int w9968cf_i2c_adap_write_byte(struct w9968cf_device*,
+ u16 address, u8 subaddress);
+static int w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device*,
+ u16 address, u8 subaddress,
+ u8 value);
+
+/* I2C interface to kernel */
+static int w9968cf_i2c_init(struct w9968cf_device*);
+static int w9968cf_i2c_smbus_xfer(struct i2c_adapter*, u16 addr,
+ unsigned short flags, char read_write,
+ u8 command, int size, union i2c_smbus_data*);
+static u32 w9968cf_i2c_func(struct i2c_adapter*);
+static int w9968cf_i2c_attach_inform(struct i2c_client*);
+static int w9968cf_i2c_detach_inform(struct i2c_client*);
+static int w9968cf_i2c_control(struct i2c_adapter*, unsigned int cmd,
+ unsigned long arg);
+
+/* Memory management */
+static void* rvmalloc(unsigned long size);
+static void rvfree(void *mem, unsigned long size);
+static void w9968cf_deallocate_memory(struct w9968cf_device*);
+static int w9968cf_allocate_memory(struct w9968cf_device*);
+
+/* High-level image sensor control functions */
+static int w9968cf_sensor_set_control(struct w9968cf_device*,int cid,int val);
+static int w9968cf_sensor_get_control(struct w9968cf_device*,int cid,int *val);
+static int w9968cf_sensor_cmd(struct w9968cf_device*,
+ unsigned int cmd, void *arg);
+static int w9968cf_sensor_init(struct w9968cf_device*);
+static int w9968cf_sensor_update_settings(struct w9968cf_device*);
+static int w9968cf_sensor_get_picture(struct w9968cf_device*);
+static int w9968cf_sensor_update_picture(struct w9968cf_device*,
+ struct video_picture pict);
+
+/* Other helper functions */
+static void w9968cf_configure_camera(struct w9968cf_device*,struct usb_device*,
+ enum w9968cf_model_id,
+ const unsigned short dev_nr);
+static void w9968cf_adjust_configuration(struct w9968cf_device*);
+static int w9968cf_turn_on_led(struct w9968cf_device*);
+static int w9968cf_init_chip(struct w9968cf_device*);
+static inline u16 w9968cf_valid_palette(u16 palette);
+static inline u16 w9968cf_valid_depth(u16 palette);
+static inline u8 w9968cf_need_decompression(u16 palette);
+static int w9968cf_set_picture(struct w9968cf_device*, struct video_picture);
+static int w9968cf_set_window(struct w9968cf_device*, struct video_window);
+static int w9968cf_postprocess_frame(struct w9968cf_device*,
+ struct w9968cf_frame_t*);
+static int w9968cf_adjust_window_size(struct w9968cf_device*, u16* w, u16* h);
+static void w9968cf_init_framelist(struct w9968cf_device*);
+static void w9968cf_push_frame(struct w9968cf_device*, u8 f_num);
+static void w9968cf_pop_frame(struct w9968cf_device*,struct w9968cf_frame_t**);
+static void w9968cf_release_resources(struct w9968cf_device*);
+
+
+
+/****************************************************************************
+ * Symbolic names *
+ ****************************************************************************/
+
+/* Used to represent a list of values and their respective symbolic names */
+struct w9968cf_symbolic_list {
+ const int num;
+ const char *name;
+};
+
+/*--------------------------------------------------------------------------
+ Returns the name of the matching element in the symbolic_list array. The
+ end of the list must be marked with an element that has a NULL name.
+ --------------------------------------------------------------------------*/
+static inline const char *
+symbolic(struct w9968cf_symbolic_list list[], const int num)
+{
+ int i;
+
+ for (i = 0; list[i].name != NULL; i++)
+ if (list[i].num == num)
+ return (list[i].name);
+
+ return "Unknown";
+}
+
+static struct w9968cf_symbolic_list camlist[] = {
+ { W9968CF_MOD_GENERIC, "W996[87]CF JPEG USB Dual Mode Camera" },
+ { W9968CF_MOD_CLVBWGP, "Creative Labs Video Blaster WebCam Go Plus" },
+
+ /* Other cameras (having the same descriptors as Generic W996[87]CF) */
+ { W9968CF_MOD_ADPVDMA, "Aroma Digi Pen VGA Dual Mode ADG-5000" },
+ { W9986CF_MOD_AAU, "AVerMedia AVerTV USB" },
+ { W9968CF_MOD_CLVBWG, "Creative Labs Video Blaster WebCam Go" },
+ { W9968CF_MOD_LL, "Lebon LDC-035A" },
+ { W9968CF_MOD_EEEMC, "Ezonics EZ-802 EZMega Cam" },
+ { W9968CF_MOD_OOE, "OmniVision OV8610-EDE" },
+ { W9968CF_MOD_ODPVDMPC, "OPCOM Digi Pen VGA Dual Mode Pen Camera" },
+ { W9968CF_MOD_PDPII, "Pretec Digi Pen-II" },
+ { W9968CF_MOD_PDP480, "Pretec DigiPen-480" },
+
+ { -1, NULL }
+};
+
+static struct w9968cf_symbolic_list senlist[] = {
+ { CC_OV76BE, "OV76BE" },
+ { CC_OV7610, "OV7610" },
+ { CC_OV7620, "OV7620" },
+ { CC_OV7620AE, "OV7620AE" },
+ { CC_OV6620, "OV6620" },
+ { CC_OV6630, "OV6630" },
+ { CC_OV6630AE, "OV6630AE" },
+ { CC_OV6630AF, "OV6630AF" },
+ { -1, NULL }
+};
+
+/* Video4Linux1 palettes */
+static struct w9968cf_symbolic_list v4l1_plist[] = {
+ { VIDEO_PALETTE_GREY, "GREY" },
+ { VIDEO_PALETTE_HI240, "HI240" },
+ { VIDEO_PALETTE_RGB565, "RGB565" },
+ { VIDEO_PALETTE_RGB24, "RGB24" },
+ { VIDEO_PALETTE_RGB32, "RGB32" },
+ { VIDEO_PALETTE_RGB555, "RGB555" },
+ { VIDEO_PALETTE_YUV422, "YUV422" },
+ { VIDEO_PALETTE_YUYV, "YUYV" },
+ { VIDEO_PALETTE_UYVY, "UYVY" },
+ { VIDEO_PALETTE_YUV420, "YUV420" },
+ { VIDEO_PALETTE_YUV411, "YUV411" },
+ { VIDEO_PALETTE_RAW, "RAW" },
+ { VIDEO_PALETTE_YUV422P, "YUV422P" },
+ { VIDEO_PALETTE_YUV411P, "YUV411P" },
+ { VIDEO_PALETTE_YUV420P, "YUV420P" },
+ { VIDEO_PALETTE_YUV410P, "YUV410P" },
+ { -1, NULL }
+};
+
+/* Decoder error codes: */
+static struct w9968cf_symbolic_list decoder_errlist[] = {
+ { W9968CF_DEC_ERR_CORRUPTED_DATA, "Corrupted data" },
+ { W9968CF_DEC_ERR_BUF_OVERFLOW, "Buffer overflow" },
+ { W9968CF_DEC_ERR_NO_SOI, "SOI marker not found" },
+ { W9968CF_DEC_ERR_NO_SOF0, "SOF0 marker not found" },
+ { W9968CF_DEC_ERR_NO_SOS, "SOS marker not found" },
+ { W9968CF_DEC_ERR_NO_EOI, "EOI marker not found" },
+ { -1, NULL }
+};
+
+/* URB error codes: */
+static struct w9968cf_symbolic_list urb_errlist[] = {
+ { -ENOMEM, "No memory for allocation of internal structures" },
+ { -ENOSPC, "The host controller's bandwidth is already consumed" },
+ { -ENOENT, "URB was canceled by unlink_urb" },
+ { -EXDEV, "ISO transfer only partially completed" },
+ { -EAGAIN, "Too match scheduled for the future" },
+ { -ENXIO, "URB already queued" },
+ { -EFBIG, "Too much ISO frames requested" },
+ { -ENOSR, "Buffer error (overrun)" },
+ { -EPIPE, "Specified endpoint is stalled (device not responding)"},
+ { -EOVERFLOW, "Babble (bad cable?)" },
+ { -EPROTO, "Bit-stuff error (bad cable?)" },
+ { -EILSEQ, "CRC/Timeout" },
+ { -ETIMEDOUT, "NAK (device does not respond)" },
+ { -1, NULL }
+};
+
+
+
+/****************************************************************************
+ * Memory management functions *
+ ****************************************************************************/
+static void* rvmalloc(unsigned long size)
+{
+ void* mem;
+ unsigned long adr;
+
+ size = PAGE_ALIGN(size);
+ mem = vmalloc_32(size);
+ if (!mem)
+ return NULL;
+
+ memset(mem, 0, size); /* Clear the ram out, no junk to the user */
+ adr = (unsigned long) mem;
+ while (size > 0) {
+ SetPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ return mem;
+}
+
+
+static void rvfree(void* mem, unsigned long size)
+{
+ unsigned long adr;
+
+ if (!mem)
+ return;
+
+ adr = (unsigned long) mem;
+ while ((long) size > 0) {
+ ClearPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ vfree(mem);
+}
+
+
+/*--------------------------------------------------------------------------
+ Deallocate previously allocated memory.
+ --------------------------------------------------------------------------*/
+static void w9968cf_deallocate_memory(struct w9968cf_device* cam)
+{
+ u8 i;
+
+ /* Free the isochronous transfer buffers */
+ for (i = 0; i < W9968CF_URBS; i++) {
+ kfree(cam->transfer_buffer[i]);
+ cam->transfer_buffer[i] = NULL;
+ }
+
+ /* Free temporary frame buffer */
+ if (cam->frame_tmp.buffer) {
+ rvfree(cam->frame_tmp.buffer, cam->frame_tmp.size);
+ cam->frame_tmp.buffer = NULL;
+ }
+
+ /* Free helper buffer */
+ if (cam->frame_vpp.buffer) {
+ rvfree(cam->frame_vpp.buffer, cam->frame_vpp.size);
+ cam->frame_vpp.buffer = NULL;
+ }
+
+ /* Free video frame buffers */
+ if (cam->frame[0].buffer) {
+ rvfree(cam->frame[0].buffer, cam->nbuffers*cam->frame[0].size);
+ cam->frame[0].buffer = NULL;
+ }
+
+ cam->nbuffers = 0;
+
+ DBG(5, "Memory successfully deallocated")
+}
+
+
+/*--------------------------------------------------------------------------
+ Allocate memory buffers for USB transfers and video frames.
+ This function is called by open() only.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_allocate_memory(struct w9968cf_device* cam)
+{
+ const u16 p_size = wMaxPacketSize[cam->altsetting-1];
+ void* buff = NULL;
+ unsigned long hw_bufsize, vpp_bufsize;
+ u8 i, bpp;
+
+ /* NOTE: Deallocation is done elsewhere in case of error */
+
+ /* Calculate the max amount of raw data per frame from the device */
+ hw_bufsize = cam->maxwidth*cam->maxheight*2;
+
+ /* Calculate the max buf. size needed for post-processing routines */
+ bpp = (w9968cf_vpp) ? 4 : 2;
+ if (cam->upscaling)
+ vpp_bufsize = max(W9968CF_MAX_WIDTH*W9968CF_MAX_HEIGHT*bpp,
+ cam->maxwidth*cam->maxheight*bpp);
+ else
+ vpp_bufsize = cam->maxwidth*cam->maxheight*bpp;
+
+ /* Allocate memory for the isochronous transfer buffers */
+ for (i = 0; i < W9968CF_URBS; i++) {
+ if (!(cam->transfer_buffer[i] =
+ kzalloc(W9968CF_ISO_PACKETS*p_size, GFP_KERNEL))) {
+ DBG(1, "Couldn't allocate memory for the isochronous "
+ "transfer buffers (%u bytes)",
+ p_size * W9968CF_ISO_PACKETS)
+ return -ENOMEM;
+ }
+ }
+
+ /* Allocate memory for the temporary frame buffer */
+ if (!(cam->frame_tmp.buffer = rvmalloc(hw_bufsize))) {
+ DBG(1, "Couldn't allocate memory for the temporary "
+ "video frame buffer (%lu bytes)", hw_bufsize)
+ return -ENOMEM;
+ }
+ cam->frame_tmp.size = hw_bufsize;
+ cam->frame_tmp.number = -1;
+
+ /* Allocate memory for the helper buffer */
+ if (w9968cf_vpp) {
+ if (!(cam->frame_vpp.buffer = rvmalloc(vpp_bufsize))) {
+ DBG(1, "Couldn't allocate memory for the helper buffer"
+ " (%lu bytes)", vpp_bufsize)
+ return -ENOMEM;
+ }
+ cam->frame_vpp.size = vpp_bufsize;
+ } else
+ cam->frame_vpp.buffer = NULL;
+
+ /* Allocate memory for video frame buffers */
+ cam->nbuffers = cam->max_buffers;
+ while (cam->nbuffers >= 2) {
+ if ((buff = rvmalloc(cam->nbuffers * vpp_bufsize)))
+ break;
+ else
+ cam->nbuffers--;
+ }
+
+ if (!buff) {
+ DBG(1, "Couldn't allocate memory for the video frame buffers")
+ cam->nbuffers = 0;
+ return -ENOMEM;
+ }
+
+ if (cam->nbuffers != cam->max_buffers)
+ DBG(2, "Couldn't allocate memory for %u video frame buffers. "
+ "Only memory for %u buffers has been allocated",
+ cam->max_buffers, cam->nbuffers)
+
+ for (i = 0; i < cam->nbuffers; i++) {
+ cam->frame[i].buffer = buff + i*vpp_bufsize;
+ cam->frame[i].size = vpp_bufsize;
+ cam->frame[i].number = i;
+ /* Circular list */
+ if (i != cam->nbuffers-1)
+ cam->frame[i].next = &cam->frame[i+1];
+ else
+ cam->frame[i].next = &cam->frame[0];
+ cam->frame[i].status = F_UNUSED;
+ }
+
+ DBG(5, "Memory successfully allocated")
+ return 0;
+}
+
+
+
+/****************************************************************************
+ * USB-specific functions *
+ ****************************************************************************/
+
+/*--------------------------------------------------------------------------
+ This is an handler function which is called after the URBs are completed.
+ It collects multiple data packets coming from the camera by putting them
+ into frame buffers: one or more zero data length data packets are used to
+ mark the end of a video frame; the first non-zero data packet is the start
+ of the next video frame; if an error is encountered in a packet, the entire
+ video frame is discarded and grabbed again.
+ If there are no requested frames in the FIFO list, packets are collected into
+ a temporary buffer.
+ --------------------------------------------------------------------------*/
+static void w9968cf_urb_complete(struct urb *urb, struct pt_regs *regs)
+{
+ struct w9968cf_device* cam = (struct w9968cf_device*)urb->context;
+ struct w9968cf_frame_t** f;
+ unsigned int len, status;
+ void* pos;
+ u8 i;
+ int err = 0;
+
+ if ((!cam->streaming) || cam->disconnected) {
+ DBG(4, "Got interrupt, but not streaming")
+ return;
+ }
+
+ /* "(*f)" will be used instead of "cam->frame_current" */
+ f = &cam->frame_current;
+
+ /* If a frame has been requested and we are grabbing into
+ the temporary frame, we'll switch to that requested frame */
+ if ((*f) == &cam->frame_tmp && *cam->requested_frame) {
+ if (cam->frame_tmp.status == F_GRABBING) {
+ w9968cf_pop_frame(cam, &cam->frame_current);
+ (*f)->status = F_GRABBING;
+ (*f)->length = cam->frame_tmp.length;
+ memcpy((*f)->buffer, cam->frame_tmp.buffer,
+ (*f)->length);
+ DBG(6, "Switched from temp. frame to frame #%d",
+ (*f)->number)
+ }
+ }
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ len = urb->iso_frame_desc[i].actual_length;
+ status = urb->iso_frame_desc[i].status;
+ pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
+
+ if (status && len != 0) {
+ DBG(4, "URB failed, error in data packet "
+ "(error #%u, %s)",
+ status, symbolic(urb_errlist, status))
+ (*f)->status = F_ERROR;
+ continue;
+ }
+
+ if (len) { /* start of frame */
+
+ if ((*f)->status == F_UNUSED) {
+ (*f)->status = F_GRABBING;
+ (*f)->length = 0;
+ }
+
+ /* Buffer overflows shouldn't happen, however...*/
+ if ((*f)->length + len > (*f)->size) {
+ DBG(4, "Buffer overflow: bad data packets")
+ (*f)->status = F_ERROR;
+ }
+
+ if ((*f)->status == F_GRABBING) {
+ memcpy((*f)->buffer + (*f)->length, pos, len);
+ (*f)->length += len;
+ }
+
+ } else if ((*f)->status == F_GRABBING) { /* end of frame */
+
+ DBG(6, "Frame #%d successfully grabbed", (*f)->number)
+
+ if (cam->vpp_flag & VPP_DECOMPRESSION) {
+ err = w9968cf_vpp->check_headers((*f)->buffer,
+ (*f)->length);
+ if (err) {
+ DBG(4, "Skip corrupted frame: %s",
+ symbolic(decoder_errlist, err))
+ (*f)->status = F_UNUSED;
+ continue; /* grab this frame again */
+ }
+ }
+
+ (*f)->status = F_READY;
+ (*f)->queued = 0;
+
+ /* Take a pointer to the new frame from the FIFO list.
+ If the list is empty,we'll use the temporary frame*/
+ if (*cam->requested_frame)
+ w9968cf_pop_frame(cam, &cam->frame_current);
+ else {
+ cam->frame_current = &cam->frame_tmp;
+ (*f)->status = F_UNUSED;
+ }
+
+ } else if ((*f)->status == F_ERROR)
+ (*f)->status = F_UNUSED; /* grab it again */
+
+ PDBGG("Frame length %lu | pack.#%u | pack.len. %u | state %d",
+ (unsigned long)(*f)->length, i, len, (*f)->status)
+
+ } /* end for */
+
+ /* Resubmit this URB */
+ urb->dev = cam->usbdev;
+ urb->status = 0;
+ spin_lock(&cam->urb_lock);
+ if (cam->streaming)
+ if ((err = usb_submit_urb(urb, GFP_ATOMIC))) {
+ cam->misconfigured = 1;
+ DBG(1, "Couldn't resubmit the URB: error %d, %s",
+ err, symbolic(urb_errlist, err))
+ }
+ spin_unlock(&cam->urb_lock);
+
+ /* Wake up the user process */
+ wake_up_interruptible(&cam->wait_queue);
+}
+
+
+/*---------------------------------------------------------------------------
+ Setup the URB structures for the isochronous transfer.
+ Submit the URBs so that the data transfer begins.
+ Return 0 on success, a negative number otherwise.
+ ---------------------------------------------------------------------------*/
+static int w9968cf_start_transfer(struct w9968cf_device* cam)
+{
+ struct usb_device *udev = cam->usbdev;
+ struct urb* urb;
+ const u16 p_size = wMaxPacketSize[cam->altsetting-1];
+ u16 w, h, d;
+ int vidcapt;
+ u32 t_size;
+ int err = 0;
+ s8 i, j;
+
+ for (i = 0; i < W9968CF_URBS; i++) {
+ urb = usb_alloc_urb(W9968CF_ISO_PACKETS, GFP_KERNEL);
+ cam->urb[i] = urb;
+ if (!urb) {
+ for (j = 0; j < i; j++)
+ usb_free_urb(cam->urb[j]);
+ DBG(1, "Couldn't allocate the URB structures")
+ return -ENOMEM;
+ }
+
+ urb->dev = udev;
+ urb->context = (void*)cam;
+ urb->pipe = usb_rcvisocpipe(udev, 1);
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = W9968CF_ISO_PACKETS;
+ urb->complete = w9968cf_urb_complete;
+ urb->transfer_buffer = cam->transfer_buffer[i];
+ urb->transfer_buffer_length = p_size*W9968CF_ISO_PACKETS;
+ urb->interval = 1;
+ for (j = 0; j < W9968CF_ISO_PACKETS; j++) {
+ urb->iso_frame_desc[j].offset = p_size*j;
+ urb->iso_frame_desc[j].length = p_size;
+ }
+ }
+
+ /* Transfer size per frame, in WORD ! */
+ d = cam->hw_depth;
+ w = cam->hw_width;
+ h = cam->hw_height;
+
+ t_size = (w*h*d)/16;
+
+ err = w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
+ err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
+
+ /* Transfer size */
+ err += w9968cf_write_reg(cam, t_size & 0xffff, 0x3d); /* low bits */
+ err += w9968cf_write_reg(cam, t_size >> 16, 0x3e); /* high bits */
+
+ if (cam->vpp_flag & VPP_DECOMPRESSION)
+ err += w9968cf_upload_quantizationtables(cam);
+
+ vidcapt = w9968cf_read_reg(cam, 0x16); /* read picture settings */
+ err += w9968cf_write_reg(cam, vidcapt|0x8000, 0x16); /* capt. enable */
+
+ err += usb_set_interface(udev, 0, cam->altsetting);
+ err += w9968cf_write_reg(cam, 0x8a05, 0x3c); /* USB FIFO enable */
+
+ if (err || (vidcapt < 0)) {
+ for (i = 0; i < W9968CF_URBS; i++)
+ usb_free_urb(cam->urb[i]);
+ DBG(1, "Couldn't tell the camera to start the data transfer")
+ return err;
+ }
+
+ w9968cf_init_framelist(cam);
+
+ /* Begin to grab into the temporary buffer */
+ cam->frame_tmp.status = F_UNUSED;
+ cam->frame_tmp.queued = 0;
+ cam->frame_current = &cam->frame_tmp;
+
+ if (!(cam->vpp_flag & VPP_DECOMPRESSION))
+ DBG(5, "Isochronous transfer size: %lu bytes/frame",
+ (unsigned long)t_size*2)
+
+ DBG(5, "Starting the isochronous transfer...")
+
+ cam->streaming = 1;
+
+ /* Submit the URBs */
+ for (i = 0; i < W9968CF_URBS; i++) {
+ err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
+ if (err) {
+ cam->streaming = 0;
+ for (j = i-1; j >= 0; j--) {
+ usb_kill_urb(cam->urb[j]);
+ usb_free_urb(cam->urb[j]);
+ }
+ DBG(1, "Couldn't send a transfer request to the "
+ "USB core (error #%d, %s)", err,
+ symbolic(urb_errlist, err))
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Stop the isochronous transfer and set alternate setting to 0 (0Mb/s).
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_stop_transfer(struct w9968cf_device* cam)
+{
+ struct usb_device *udev = cam->usbdev;
+ unsigned long lock_flags;
+ int err = 0;
+ s8 i;
+
+ if (!cam->streaming)
+ return 0;
+
+ /* This avoids race conditions with usb_submit_urb()
+ in the URB completition handler */
+ spin_lock_irqsave(&cam->urb_lock, lock_flags);
+ cam->streaming = 0;
+ spin_unlock_irqrestore(&cam->urb_lock, lock_flags);
+
+ for (i = W9968CF_URBS-1; i >= 0; i--)
+ if (cam->urb[i]) {
+ usb_kill_urb(cam->urb[i]);
+ usb_free_urb(cam->urb[i]);
+ cam->urb[i] = NULL;
+ }
+
+ if (cam->disconnected)
+ goto exit;
+
+ err = w9968cf_write_reg(cam, 0x0a05, 0x3c); /* stop USB transfer */
+ err += usb_set_interface(udev, 0, 0); /* 0 Mb/s */
+ err += w9968cf_write_reg(cam, 0x0000, 0x39); /* disable JPEG encoder */
+ err += w9968cf_write_reg(cam, 0x0000, 0x16); /* stop video capture */
+
+ if (err) {
+ DBG(2, "Failed to tell the camera to stop the isochronous "
+ "transfer. However this is not a critical error.")
+ return -EIO;
+ }
+
+exit:
+ DBG(5, "Isochronous transfer stopped")
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Write a W9968CF register.
+ Return 0 on success, -1 otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_write_reg(struct w9968cf_device* cam, u16 value, u16 index)
+{
+ struct usb_device* udev = cam->usbdev;
+ int res;
+
+ res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
+ USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+ value, index, NULL, 0, W9968CF_USB_CTRL_TIMEOUT);
+
+ if (res < 0)
+ DBG(4, "Failed to write a register "
+ "(value 0x%04X, index 0x%02X, error #%d, %s)",
+ value, index, res, symbolic(urb_errlist, res))
+
+ return (res >= 0) ? 0 : -1;
+}
+
+
+/*--------------------------------------------------------------------------
+ Read a W9968CF register.
+ Return the register value on success, -1 otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_read_reg(struct w9968cf_device* cam, u16 index)
+{
+ struct usb_device* udev = cam->usbdev;
+ u16* buff = cam->control_buffer;
+ int res;
+
+ res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 1,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0, index, buff, 2, W9968CF_USB_CTRL_TIMEOUT);
+
+ if (res < 0)
+ DBG(4, "Failed to read a register "
+ "(index 0x%02X, error #%d, %s)",
+ index, res, symbolic(urb_errlist, res))
+
+ return (res >= 0) ? (int)(*buff) : -1;
+}
+
+
+/*--------------------------------------------------------------------------
+ Write 64-bit data to the fast serial bus registers.
+ Return 0 on success, -1 otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_write_fsb(struct w9968cf_device* cam, u16* data)
+{
+ struct usb_device* udev = cam->usbdev;
+ u16 value;
+ int res;
+
+ value = *data++;
+
+ res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
+ USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+ value, 0x06, data, 6, W9968CF_USB_CTRL_TIMEOUT);
+
+ if (res < 0)
+ DBG(4, "Failed to write the FSB registers "
+ "(error #%d, %s)", res, symbolic(urb_errlist, res))
+
+ return (res >= 0) ? 0 : -1;
+}
+
+
+/*--------------------------------------------------------------------------
+ Write data to the serial bus control register.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_write_sb(struct w9968cf_device* cam, u16 value)
+{
+ int err = 0;
+
+ err = w9968cf_write_reg(cam, value, 0x01);
+ udelay(W9968CF_I2C_BUS_DELAY);
+
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Read data from the serial bus control register.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_read_sb(struct w9968cf_device* cam)
+{
+ int v = 0;
+
+ v = w9968cf_read_reg(cam, 0x01);
+ udelay(W9968CF_I2C_BUS_DELAY);
+
+ return v;
+}
+
+
+/*--------------------------------------------------------------------------
+ Upload quantization tables for the JPEG compression.
+ This function is called by w9968cf_start_transfer().
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_upload_quantizationtables(struct w9968cf_device* cam)
+{
+ u16 a, b;
+ int err = 0, i, j;
+
+ err += w9968cf_write_reg(cam, 0x0010, 0x39); /* 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);
+ err += w9968cf_write_reg(cam, a, 0x40+i);
+ err += w9968cf_write_reg(cam, b, 0x60+i);
+ }
+ err += w9968cf_write_reg(cam, 0x0012, 0x39); /* JPEG encoder enable */
+
+ return err;
+}
+
+
+
+/****************************************************************************
+ * 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 int w9968cf_smbus_start(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
+ err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
+
+ return err;
+}
+
+
+static int w9968cf_smbus_stop(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
+ err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
+
+ return err;
+}
+
+
+static int w9968cf_smbus_write_byte(struct w9968cf_device* cam, u8 v)
+{
+ u8 bit;
+ int err = 0, sda;
+
+ for (bit = 0 ; bit < 8 ; bit++) {
+ sda = (v & 0x80) ? 2 : 0;
+ v <<= 1;
+ /* SDE=1, SDA=sda, SCL=0 */
+ err += w9968cf_write_sb(cam, 0x10 | sda);
+ /* SDE=1, SDA=sda, SCL=1 */
+ err += w9968cf_write_sb(cam, 0x11 | sda);
+ /* SDE=1, SDA=sda, SCL=0 */
+ err += w9968cf_write_sb(cam, 0x10 | sda);
+ }
+
+ return err;
+}
+
+
+static int w9968cf_smbus_read_byte(struct w9968cf_device* cam, u8* v)
+{
+ u8 bit;
+ int err = 0;
+
+ *v = 0;
+ for (bit = 0 ; bit < 8 ; bit++) {
+ *v <<= 1;
+ err += w9968cf_write_sb(cam, 0x0013);
+ *v |= (w9968cf_read_sb(cam) & 0x0008) ? 1 : 0;
+ err += w9968cf_write_sb(cam, 0x0012);
+ }
+
+ return err;
+}
+
+
+static int w9968cf_smbus_write_ack(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
+ err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
+ err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
+
+ return err;
+}
+
+
+static int w9968cf_smbus_read_ack(struct w9968cf_device* cam)
+{
+ int err = 0, sda;
+
+ err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
+ sda = (w9968cf_read_sb(cam) & 0x08) ? 1 : 0; /* sda = SDA */
+ err += w9968cf_write_sb(cam, 0x0012); /* SDE=1, SDA=1, SCL=0 */
+ if (sda < 0)
+ err += sda;
+ if (sda == 1) {
+ DBG(6, "Couldn't receive the ACK")
+ err += -1;
+ }
+
+ return err;
+}
+
+
+/* This seems to refresh the communication through the serial bus */
+static int w9968cf_smbus_refresh_bus(struct w9968cf_device* cam)
+{
+ int err = 0, j;
+
+ for (j = 1; j <= 10; j++) {
+ err = w9968cf_write_reg(cam, 0x0020, 0x01);
+ err += w9968cf_write_reg(cam, 0x0000, 0x01);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+
+/* SMBus protocol: S Addr Wr [A] Subaddr [A] Value [A] P */
+static int
+w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device* cam,
+ u16 address, u8 subaddress,u8 value)
+{
+ u16* data = cam->data_buffer;
+ int err = 0;
+
+ err += w9968cf_smbus_refresh_bus(cam);
+
+ /* Enable SBUS outputs */
+ err += w9968cf_write_sb(cam, 0x0020);
+
+ data[0] = 0x082f | ((address & 0x80) ? 0x1500 : 0x0);
+ data[0] |= (address & 0x40) ? 0x4000 : 0x0;
+ data[1] = 0x2082 | ((address & 0x40) ? 0x0005 : 0x0);
+ data[1] |= (address & 0x20) ? 0x0150 : 0x0;
+ data[1] |= (address & 0x10) ? 0x5400 : 0x0;
+ data[2] = 0x8208 | ((address & 0x08) ? 0x0015 : 0x0);
+ data[2] |= (address & 0x04) ? 0x0540 : 0x0;
+ data[2] |= (address & 0x02) ? 0x5000 : 0x0;
+ data[3] = 0x1d20 | ((address & 0x02) ? 0x0001 : 0x0);
+ data[3] |= (address & 0x01) ? 0x0054 : 0x0;
+
+ err += w9968cf_write_fsb(cam, data);
+
+ data[0] = 0x8208 | ((subaddress & 0x80) ? 0x0015 : 0x0);
+ data[0] |= (subaddress & 0x40) ? 0x0540 : 0x0;
+ data[0] |= (subaddress & 0x20) ? 0x5000 : 0x0;
+ data[1] = 0x0820 | ((subaddress & 0x20) ? 0x0001 : 0x0);
+ data[1] |= (subaddress & 0x10) ? 0x0054 : 0x0;
+ data[1] |= (subaddress & 0x08) ? 0x1500 : 0x0;
+ data[1] |= (subaddress & 0x04) ? 0x4000 : 0x0;
+ data[2] = 0x2082 | ((subaddress & 0x04) ? 0x0005 : 0x0);
+ data[2] |= (subaddress & 0x02) ? 0x0150 : 0x0;
+ data[2] |= (subaddress & 0x01) ? 0x5400 : 0x0;
+ data[3] = 0x001d;
+
+ err += w9968cf_write_fsb(cam, 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;
+
+ err += w9968cf_write_fsb(cam, data);
+
+ /* Disable SBUS outputs */
+ err += w9968cf_write_sb(cam, 0x0000);
+
+ if (!err)
+ DBG(5, "I2C write byte data done, addr.0x%04X, subaddr.0x%02X "
+ "value 0x%02X", address, subaddress, value)
+ else
+ DBG(5, "I2C write byte data failed, addr.0x%04X, "
+ "subaddr.0x%02X, value 0x%02X",
+ address, subaddress, value)
+
+ return err;
+}
+
+
+/* SMBus protocol: S Addr Wr [A] Subaddr [A] P S Addr+1 Rd [A] [Value] NA P */
+static int
+w9968cf_i2c_adap_read_byte_data(struct w9968cf_device* cam,
+ u16 address, u8 subaddress,
+ u8* value)
+{
+ int err = 0;
+
+ /* Serial data enable */
+ err += w9968cf_write_sb(cam, 0x0013); /* don't change ! */
+
+ err += w9968cf_smbus_start(cam);
+ err += w9968cf_smbus_write_byte(cam, address);
+ err += w9968cf_smbus_read_ack(cam);
+ err += w9968cf_smbus_write_byte(cam, subaddress);
+ err += w9968cf_smbus_read_ack(cam);
+ err += w9968cf_smbus_stop(cam);
+ err += w9968cf_smbus_start(cam);
+ err += w9968cf_smbus_write_byte(cam, address + 1);
+ err += w9968cf_smbus_read_ack(cam);
+ err += w9968cf_smbus_read_byte(cam, value);
+ err += w9968cf_smbus_write_ack(cam);
+ err += w9968cf_smbus_stop(cam);
+
+ /* Serial data disable */
+ err += w9968cf_write_sb(cam, 0x0000);
+
+ if (!err)
+ DBG(5, "I2C read byte data done, addr.0x%04X, "
+ "subaddr.0x%02X, value 0x%02X",
+ address, subaddress, *value)
+ else
+ DBG(5, "I2C read byte data failed, addr.0x%04X, "
+ "subaddr.0x%02X, wrong value 0x%02X",
+ address, subaddress, *value)
+
+ return err;
+}
+
+
+/* SMBus protocol: S Addr+1 Rd [A] [Value] NA P */
+static int
+w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
+ u16 address, u8* value)
+{
+ int err = 0;
+
+ /* Serial data enable */
+ err += w9968cf_write_sb(cam, 0x0013);
+
+ err += w9968cf_smbus_start(cam);
+ err += w9968cf_smbus_write_byte(cam, address + 1);
+ err += w9968cf_smbus_read_ack(cam);
+ err += w9968cf_smbus_read_byte(cam, value);
+ err += w9968cf_smbus_write_ack(cam);
+ err += w9968cf_smbus_stop(cam);
+
+ /* Serial data disable */
+ err += w9968cf_write_sb(cam, 0x0000);
+
+ if (!err)
+ DBG(5, "I2C read byte done, addr.0x%04X, "
+ "value 0x%02X", address, *value)
+ else
+ DBG(5, "I2C read byte failed, addr.0x%04X, "
+ "wrong value 0x%02X", address, *value)
+
+ return err;
+}
+
+
+/* SMBus protocol: S Addr Wr [A] Value [A] P */
+static int
+w9968cf_i2c_adap_write_byte(struct w9968cf_device* cam,
+ u16 address, u8 value)
+{
+ DBG(4, "i2c_write_byte() is an unsupported transfer mode")
+ return -EINVAL;
+}
+
+
+
+/****************************************************************************
+ * I2C interface to kernel *
+ ****************************************************************************/
+
+static int
+w9968cf_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
+ unsigned short flags, char read_write, u8 command,
+ int size, union i2c_smbus_data *data)
+{
+ struct w9968cf_device* cam = i2c_get_adapdata(adapter);
+ u8 i;
+ int err = 0;
+
+ switch (addr) {
+ case OV6xx0_SID:
+ case OV7xx0_SID:
+ break;
+ default:
+ DBG(4, "Rejected slave ID 0x%04X", addr)
+ return -EINVAL;
+ }
+
+ if (size == I2C_SMBUS_BYTE) {
+ /* Why addr <<= 1? See OVXXX0_SID defines in ovcamchip.h */
+ addr <<= 1;
+
+ if (read_write == I2C_SMBUS_WRITE)
+ err = w9968cf_i2c_adap_write_byte(cam, addr, command);
+ else if (read_write == I2C_SMBUS_READ)
+ err = w9968cf_i2c_adap_read_byte(cam,addr,&data->byte);
+
+ } else if (size == I2C_SMBUS_BYTE_DATA) {
+ addr <<= 1;
+
+ if (read_write == I2C_SMBUS_WRITE)
+ err = w9968cf_i2c_adap_fastwrite_byte_data(cam, addr,
+ command, data->byte);
+ else if (read_write == I2C_SMBUS_READ) {
+ for (i = 1; i <= W9968CF_I2C_RW_RETRIES; i++) {
+ err = w9968cf_i2c_adap_read_byte_data(cam,addr,
+ command, &data->byte);
+ if (err) {
+ if (w9968cf_smbus_refresh_bus(cam)) {
+ err = -EIO;
+ break;
+ }
+ } else
+ break;
+ }
+
+ } else
+ return -EINVAL;
+
+ } else {
+ DBG(4, "Unsupported I2C transfer mode (%d)", size)
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+
+static u32 w9968cf_i2c_func(struct i2c_adapter* adap)
+{
+ return I2C_FUNC_SMBUS_READ_BYTE |
+ I2C_FUNC_SMBUS_READ_BYTE_DATA |
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
+}
+
+
+static int w9968cf_i2c_attach_inform(struct i2c_client* client)
+{
+ struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
+ int id = client->driver->id, err = 0;
+
+ if (id == I2C_DRIVERID_OVCAMCHIP) {
+ cam->sensor_client = client;
+ err = w9968cf_sensor_init(cam);
+ if (err) {
+ cam->sensor_client = NULL;
+ return err;
+ }
+ } else {
+ DBG(4, "Rejected client [%s] with driver [%s]",
+ client->name, client->driver->driver.name)
+ return -EINVAL;
+ }
+
+ DBG(5, "I2C attach client [%s] with driver [%s]",
+ client->name, client->driver->driver.name)
+
+ return 0;
+}
+
+
+static int w9968cf_i2c_detach_inform(struct i2c_client* client)
+{
+ struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
+
+ if (cam->sensor_client == client)
+ cam->sensor_client = NULL;
+
+ DBG(5, "I2C detach client [%s]", client->name)
+
+ return 0;
+}
+
+
+static int
+w9968cf_i2c_control(struct i2c_adapter* adapter, unsigned int cmd,
+ unsigned long arg)
+{
+ return 0;
+}
+
+
+static int w9968cf_i2c_init(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ static struct i2c_algorithm algo = {
+ .smbus_xfer = w9968cf_i2c_smbus_xfer,
+ .algo_control = w9968cf_i2c_control,
+ .functionality = w9968cf_i2c_func,
+ };
+
+ static struct i2c_adapter adap = {
+ .id = I2C_HW_SMBUS_W9968CF,
+ .class = I2C_CLASS_CAM_DIGITAL,
+ .owner = THIS_MODULE,
+ .client_register = w9968cf_i2c_attach_inform,
+ .client_unregister = w9968cf_i2c_detach_inform,
+ .algo = &algo,
+ };
+
+ memcpy(&cam->i2c_adapter, &adap, sizeof(struct i2c_adapter));
+ strcpy(cam->i2c_adapter.name, "w9968cf");
+ i2c_set_adapdata(&cam->i2c_adapter, cam);
+
+ DBG(6, "Registering I2C adapter with kernel...")
+
+ err = i2c_add_adapter(&cam->i2c_adapter);
+ if (err)
+ DBG(1, "Failed to register the I2C adapter")
+ else
+ DBG(5, "I2C adapter registered")
+
+ return err;
+}
+
+
+
+/****************************************************************************
+ * Helper functions *
+ ****************************************************************************/
+
+/*--------------------------------------------------------------------------
+ Turn on the LED on some webcams. A beep should be heard too.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_turn_on_led(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power-down */
+ err += w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
+ err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
+ err += w9968cf_write_reg(cam, 0x0010, 0x01); /* serial bus, SDS high */
+ err += w9968cf_write_reg(cam, 0x0000, 0x01); /* serial bus, SDS low */
+ err += w9968cf_write_reg(cam, 0x0010, 0x01); /* ..high 'beep-beep' */
+
+ if (err)
+ DBG(2, "Couldn't turn on the LED")
+
+ DBG(5, "LED turned on")
+
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Write some registers for the device initialization.
+ This function is called once on open().
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_init_chip(struct w9968cf_device* cam)
+{
+ unsigned long hw_bufsize = cam->maxwidth*cam->maxheight*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;
+ int err = 0;
+
+ err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power off */
+ err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* power on */
+
+ err += w9968cf_write_reg(cam, 0x405d, 0x03); /* DRAM timings */
+ err += w9968cf_write_reg(cam, 0x0030, 0x04); /* SDRAM timings */
+
+ err += w9968cf_write_reg(cam, y0 & 0xffff, 0x20); /* Y buf.0, low */
+ err += w9968cf_write_reg(cam, y0 >> 16, 0x21); /* Y buf.0, high */
+ err += w9968cf_write_reg(cam, u0 & 0xffff, 0x24); /* U buf.0, low */
+ err += w9968cf_write_reg(cam, u0 >> 16, 0x25); /* U buf.0, high */
+ err += w9968cf_write_reg(cam, v0 & 0xffff, 0x28); /* V buf.0, low */
+ err += w9968cf_write_reg(cam, v0 >> 16, 0x29); /* V buf.0, high */
+
+ err += w9968cf_write_reg(cam, y1 & 0xffff, 0x22); /* Y buf.1, low */
+ err += w9968cf_write_reg(cam, y1 >> 16, 0x23); /* Y buf.1, high */
+ err += w9968cf_write_reg(cam, u1 & 0xffff, 0x26); /* U buf.1, low */
+ err += w9968cf_write_reg(cam, u1 >> 16, 0x27); /* U buf.1, high */
+ err += w9968cf_write_reg(cam, v1 & 0xffff, 0x2a); /* V buf.1, low */
+ err += w9968cf_write_reg(cam, v1 >> 16, 0x2b); /* V buf.1, high */
+
+ err += w9968cf_write_reg(cam, y1 & 0xffff, 0x32); /* JPEG buf 0 low */
+ err += w9968cf_write_reg(cam, y1 >> 16, 0x33); /* JPEG buf 0 high */
+
+ err += w9968cf_write_reg(cam, y1 & 0xffff, 0x34); /* JPEG buf 1 low */
+ err += w9968cf_write_reg(cam, y1 >> 16, 0x35); /* JPEG bug 1 high */
+
+ err += w9968cf_write_reg(cam, 0x0000, 0x36);/* JPEG restart interval */
+ err += w9968cf_write_reg(cam, 0x0804, 0x37);/*JPEG VLE FIFO threshold*/
+ err += w9968cf_write_reg(cam, 0x0000, 0x38);/* disable hw up-scaling */
+ err += w9968cf_write_reg(cam, 0x0000, 0x3f); /* JPEG/MCTL test data */
+
+ err += w9968cf_set_picture(cam, cam->picture); /* this before */
+ err += w9968cf_set_window(cam, cam->window);
+
+ if (err)
+ DBG(1, "Chip initialization failed")
+ else
+ DBG(5, "Chip successfully initialized")
+
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Return non-zero if the palette is supported, 0 otherwise.
+ --------------------------------------------------------------------------*/
+static inline u16 w9968cf_valid_palette(u16 palette)
+{
+ u8 i = 0;
+ while (w9968cf_formatlist[i].palette != 0) {
+ if (palette == w9968cf_formatlist[i].palette)
+ return palette;
+ i++;
+ }
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Return the depth corresponding to the given palette.
+ Palette _must_ be supported !
+ --------------------------------------------------------------------------*/
+static inline u16 w9968cf_valid_depth(u16 palette)
+{
+ u8 i=0;
+ while (w9968cf_formatlist[i].palette != palette)
+ i++;
+
+ return w9968cf_formatlist[i].depth;
+}
+
+
+/*--------------------------------------------------------------------------
+ Return non-zero if the format requires decompression, 0 otherwise.
+ --------------------------------------------------------------------------*/
+static inline u8 w9968cf_need_decompression(u16 palette)
+{
+ u8 i = 0;
+ while (w9968cf_formatlist[i].palette != 0) {
+ if (palette == w9968cf_formatlist[i].palette)
+ return w9968cf_formatlist[i].compression;
+ i++;
+ }
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Change the picture settings of the camera.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int
+w9968cf_set_picture(struct w9968cf_device* cam, struct video_picture pict)
+{
+ u16 fmt, hw_depth, hw_palette, reg_v = 0x0000;
+ int err = 0;
+
+ /* Make sure we are using a valid depth */
+ pict.depth = w9968cf_valid_depth(pict.palette);
+
+ fmt = pict.palette;
+
+ hw_depth = pict.depth; /* depth used by the winbond chip */
+ hw_palette = pict.palette; /* palette used by the winbond chip */
+
+ /* VS & HS polarities */
+ reg_v = (cam->vs_polarity << 12) | (cam->hs_polarity << 11);
+
+ switch (fmt)
+ {
+ case VIDEO_PALETTE_UYVY:
+ reg_v |= 0x0000;
+ cam->vpp_flag = VPP_NONE;
+ break;
+ case VIDEO_PALETTE_YUV422P:
+ reg_v |= 0x0002;
+ cam->vpp_flag = VPP_DECOMPRESSION;
+ break;
+ case VIDEO_PALETTE_YUV420:
+ case VIDEO_PALETTE_YUV420P:
+ reg_v |= 0x0003;
+ cam->vpp_flag = VPP_DECOMPRESSION;
+ break;
+ case VIDEO_PALETTE_YUYV:
+ case VIDEO_PALETTE_YUV422:
+ reg_v |= 0x0000;
+ cam->vpp_flag = VPP_SWAP_YUV_BYTES;
+ hw_palette = VIDEO_PALETTE_UYVY;
+ break;
+ /* Original video is used instead of RGBX palettes.
+ Software conversion later. */
+ case VIDEO_PALETTE_GREY:
+ case VIDEO_PALETTE_RGB555:
+ case VIDEO_PALETTE_RGB565:
+ case VIDEO_PALETTE_RGB24:
+ case VIDEO_PALETTE_RGB32:
+ reg_v |= 0x0000; /* UYVY 16 bit is used */
+ hw_depth = 16;
+ hw_palette = VIDEO_PALETTE_UYVY;
+ cam->vpp_flag = VPP_UYVY_TO_RGBX;
+ break;
+ }
+
+ /* NOTE: due to memory issues, it is better to disable the hardware
+ double buffering during compression */
+ if (cam->double_buffer && !(cam->vpp_flag & VPP_DECOMPRESSION))
+ reg_v |= 0x0080;
+
+ if (cam->clamping)
+ reg_v |= 0x0020;
+
+ if (cam->filter_type == 1)
+ reg_v |= 0x0008;
+ else if (cam->filter_type == 2)
+ reg_v |= 0x000c;
+
+ if ((err = w9968cf_write_reg(cam, reg_v, 0x16)))
+ goto error;
+
+ if ((err = w9968cf_sensor_update_picture(cam, pict)))
+ goto error;
+
+ /* If all went well, update the device data structure */
+ memcpy(&cam->picture, &pict, sizeof(pict));
+ cam->hw_depth = hw_depth;
+ cam->hw_palette = hw_palette;
+
+ /* Settings changed, so we clear the frame buffers */
+ memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
+
+ DBG(4, "Palette is %s, depth is %u bpp",
+ symbolic(v4l1_plist, pict.palette), pict.depth)
+
+ return 0;
+
+error:
+ DBG(1, "Failed to change picture settings")
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Change the capture area size of the camera.
+ This function _must_ be called _after_ w9968cf_set_picture().
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int
+w9968cf_set_window(struct w9968cf_device* cam, struct video_window win)
+{
+ u16 x, y, w, h, scx, scy, cw, ch, ax, ay;
+ unsigned long fw, fh;
+ struct ovcamchip_window s_win;
+ int err = 0;
+
+ /* Work around to avoid FP arithmetics */
+ #define __SC(x) ((x) << 10)
+ #define __UNSC(x) ((x) >> 10)
+
+ /* Make sure we are using a supported resolution */
+ if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
+ (u16*)&win.height)))
+ goto error;
+
+ /* Scaling factors */
+ fw = __SC(win.width) / cam->maxwidth;
+ fh = __SC(win.height) / cam->maxheight;
+
+ /* Set up the width and height values used by the chip */
+ if ((win.width > cam->maxwidth) || (win.height > cam->maxheight)) {
+ cam->vpp_flag |= VPP_UPSCALE;
+ /* Calculate largest w,h mantaining the same w/h ratio */
+ w = (fw >= fh) ? cam->maxwidth : __SC(win.width)/fh;
+ h = (fw >= fh) ? __SC(win.height)/fw : cam->maxheight;
+ if (w < cam->minwidth) /* just in case */
+ w = cam->minwidth;
+ if (h < cam->minheight) /* just in case */
+ h = cam->minheight;
+ } else {
+ cam->vpp_flag &= ~VPP_UPSCALE;
+ w = win.width;
+ h = win.height;
+ }
+
+ /* x,y offsets of the cropped area */
+ scx = cam->start_cropx;
+ scy = cam->start_cropy;
+
+ /* Calculate cropped area manteining the right w/h ratio */
+ if (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE)) {
+ cw = (fw >= fh) ? cam->maxwidth : __SC(win.width)/fh;
+ ch = (fw >= fh) ? __SC(win.height)/fw : cam->maxheight;
+ } else {
+ cw = w;
+ ch = h;
+ }
+
+ /* Setup the window of the sensor */
+ s_win.format = VIDEO_PALETTE_UYVY;
+ s_win.width = cam->maxwidth;
+ s_win.height = cam->maxheight;
+ s_win.quarter = 0; /* full progressive video */
+
+ /* Center it */
+ s_win.x = (s_win.width - cw) / 2;
+ s_win.y = (s_win.height - ch) / 2;
+
+ /* Clock divisor */
+ if (cam->clockdiv >= 0)
+ s_win.clockdiv = cam->clockdiv; /* manual override */
+ else
+ switch (cam->sensor) {
+ case CC_OV6620:
+ s_win.clockdiv = 0;
+ break;
+ case CC_OV6630:
+ s_win.clockdiv = 0;
+ break;
+ case CC_OV76BE:
+ case CC_OV7610:
+ case CC_OV7620:
+ s_win.clockdiv = 0;
+ break;
+ default:
+ s_win.clockdiv = W9968CF_DEF_CLOCKDIVISOR;
+ }
+
+ /* We have to scale win.x and win.y offsets */
+ if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
+ || (cam->vpp_flag & VPP_UPSCALE) ) {
+ ax = __SC(win.x)/fw;
+ ay = __SC(win.y)/fh;
+ } else {
+ ax = win.x;
+ ay = win.y;
+ }
+
+ if ((ax + cw) > cam->maxwidth)
+ ax = cam->maxwidth - cw;
+
+ if ((ay + ch) > cam->maxheight)
+ ay = cam->maxheight - ch;
+
+ /* Adjust win.x, win.y */
+ if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
+ || (cam->vpp_flag & VPP_UPSCALE) ) {
+ win.x = __UNSC(ax*fw);
+ win.y = __UNSC(ay*fh);
+ } else {
+ win.x = ax;
+ win.y = ay;
+ }
+
+ /* Offsets used by the chip */
+ x = ax + s_win.x;
+ y = ay + s_win.y;
+
+ /* Go ! */
+ if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_MODE, &s_win)))
+ goto error;
+
+ err += w9968cf_write_reg(cam, scx + x, 0x10);
+ err += w9968cf_write_reg(cam, scy + y, 0x11);
+ err += w9968cf_write_reg(cam, scx + x + cw, 0x12);
+ err += w9968cf_write_reg(cam, scy + y + ch, 0x13);
+ err += w9968cf_write_reg(cam, w, 0x14);
+ err += w9968cf_write_reg(cam, h, 0x15);
+
+ /* JPEG width & height */
+ err += w9968cf_write_reg(cam, w, 0x30);
+ err += w9968cf_write_reg(cam, h, 0x31);
+
+ /* Y & UV frame buffer strides (in WORD) */
+ if (cam->vpp_flag & VPP_DECOMPRESSION) {
+ err += w9968cf_write_reg(cam, w/2, 0x2c);
+ err += w9968cf_write_reg(cam, w/4, 0x2d);
+ } else
+ err += w9968cf_write_reg(cam, w, 0x2c);
+
+ if (err)
+ goto error;
+
+ /* If all went well, update the device data structure */
+ memcpy(&cam->window, &win, sizeof(win));
+ cam->hw_width = w;
+ cam->hw_height = h;
+
+ /* Settings changed, so we clear the frame buffers */
+ memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
+
+ DBG(4, "The capture area is %dx%d, Offset (x,y)=(%u,%u)",
+ win.width, win.height, win.x, win.y)
+
+ PDBGG("x=%u ,y=%u, w=%u, h=%u, ax=%u, ay=%u, s_win.x=%u, s_win.y=%u, "
+ "cw=%u, ch=%u, win.x=%u, win.y=%u, win.width=%u, win.height=%u",
+ x, y, w, h, ax, ay, s_win.x, s_win.y, cw, ch, win.x, win.y,
+ win.width, win.height)
+
+ return 0;
+
+error:
+ DBG(1, "Failed to change the capture area size")
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Adjust the asked values for window width and height.
+ Return 0 on success, -1 otherwise.
+ --------------------------------------------------------------------------*/
+static int
+w9968cf_adjust_window_size(struct w9968cf_device* cam, u16* width, u16* height)
+{
+ u16 maxw, maxh;
+
+ if ((*width < cam->minwidth) || (*height < cam->minheight))
+ return -ERANGE;
+
+ maxw = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
+ w9968cf_vpp ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
+ : cam->maxwidth;
+ maxh = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
+ w9968cf_vpp ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
+ : cam->maxheight;
+
+ if (*width > maxw)
+ *width = maxw;
+ if (*height > maxh)
+ *height = maxh;
+
+ if (cam->vpp_flag & VPP_DECOMPRESSION) {
+ *width &= ~15L; /* multiple of 16 */
+ *height &= ~15L;
+ }
+
+ PDBGG("Window size adjusted w=%u, h=%u ", *width, *height)
+
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Initialize the FIFO list of requested frames.
+ --------------------------------------------------------------------------*/
+static void w9968cf_init_framelist(struct w9968cf_device* cam)
+{
+ u8 i;
+
+ for (i = 0; i < cam->nbuffers; i++) {
+ cam->requested_frame[i] = NULL;
+ cam->frame[i].queued = 0;
+ cam->frame[i].status = F_UNUSED;
+ }
+}
+
+
+/*--------------------------------------------------------------------------
+ Add a frame in the FIFO list of requested frames.
+ This function is called in process context.
+ --------------------------------------------------------------------------*/
+static void w9968cf_push_frame(struct w9968cf_device* cam, u8 f_num)
+{
+ u8 f;
+ unsigned long lock_flags;
+
+ spin_lock_irqsave(&cam->flist_lock, lock_flags);
+
+ for (f=0; cam->requested_frame[f] != NULL; f++);
+ cam->requested_frame[f] = &cam->frame[f_num];
+ cam->frame[f_num].queued = 1;
+ cam->frame[f_num].status = F_UNUSED; /* clear the status */
+
+ spin_unlock_irqrestore(&cam->flist_lock, lock_flags);
+
+ DBG(6, "Frame #%u pushed into the FIFO list. Position %u", f_num, f)
+}
+
+
+/*--------------------------------------------------------------------------
+ Read, store and remove the first pointer in the FIFO list of requested
+ frames. This function is called in interrupt context.
+ --------------------------------------------------------------------------*/
+static void
+w9968cf_pop_frame(struct w9968cf_device* cam, struct w9968cf_frame_t** framep)
+{
+ u8 i;
+
+ spin_lock(&cam->flist_lock);
+
+ *framep = cam->requested_frame[0];
+
+ /* Shift the list of pointers */
+ for (i = 0; i < cam->nbuffers-1; i++)
+ cam->requested_frame[i] = cam->requested_frame[i+1];
+ cam->requested_frame[i] = NULL;
+
+ spin_unlock(&cam->flist_lock);
+
+ DBG(6,"Popped frame #%d from the list", (*framep)->number)
+}
+
+
+/*--------------------------------------------------------------------------
+ High-level video post-processing routine on grabbed frames.
+ Return 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int
+w9968cf_postprocess_frame(struct w9968cf_device* cam,
+ struct w9968cf_frame_t* fr)
+{
+ void *pIn = fr->buffer, *pOut = cam->frame_vpp.buffer, *tmp;
+ u16 w = cam->window.width,
+ h = cam->window.height,
+ d = cam->picture.depth,
+ fmt = cam->picture.palette,
+ rgb = cam->force_rgb,
+ hw_w = cam->hw_width,
+ hw_h = cam->hw_height,
+ hw_d = cam->hw_depth;
+ int err = 0;
+
+ #define _PSWAP(pIn, pOut) {tmp = (pIn); (pIn) = (pOut); (pOut) = tmp;}
+
+ if (cam->vpp_flag & VPP_DECOMPRESSION) {
+ memcpy(pOut, pIn, fr->length);
+ _PSWAP(pIn, pOut)
+ err = w9968cf_vpp->decode(pIn, fr->length, hw_w, hw_h, pOut);
+ PDBGG("Compressed frame length: %lu",(unsigned long)fr->length)
+ fr->length = (hw_w*hw_h*hw_d)/8;
+ _PSWAP(pIn, pOut)
+ if (err) {
+ DBG(4, "An error occurred while decoding the frame: "
+ "%s", symbolic(decoder_errlist, err))
+ return err;
+ } else
+ DBG(6, "Frame decoded")
+ }
+
+ if (cam->vpp_flag & VPP_SWAP_YUV_BYTES) {
+ w9968cf_vpp->swap_yuvbytes(pIn, fr->length);
+ DBG(6, "Original UYVY component ordering changed")
+ }
+
+ if (cam->vpp_flag & VPP_UPSCALE) {
+ w9968cf_vpp->scale_up(pIn, pOut, hw_w, hw_h, hw_d, w, h);
+ fr->length = (w*h*hw_d)/8;
+ _PSWAP(pIn, pOut)
+ DBG(6, "Vertical up-scaling done: %u,%u,%ubpp->%u,%u",
+ hw_w, hw_h, hw_d, w, h)
+ }
+
+ if (cam->vpp_flag & VPP_UYVY_TO_RGBX) {
+ w9968cf_vpp->uyvy_to_rgbx(pIn, fr->length, pOut, fmt, rgb);
+ fr->length = (w*h*d)/8;
+ _PSWAP(pIn, pOut)
+ DBG(6, "UYVY-16bit to %s conversion done",
+ symbolic(v4l1_plist, fmt))
+ }
+
+ if (pOut == fr->buffer)
+ memcpy(fr->buffer, cam->frame_vpp.buffer, fr->length);
+
+ return 0;
+}
+
+
+
+/****************************************************************************
+ * Image sensor control routines *
+ ****************************************************************************/
+
+static int
+w9968cf_sensor_set_control(struct w9968cf_device* cam, int cid, int val)
+{
+ struct ovcamchip_control ctl;
+ int err;
+
+ ctl.id = cid;
+ ctl.value = val;
+
+ err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_CTRL, &ctl);
+
+ return err;
+}
+
+
+static int
+w9968cf_sensor_get_control(struct w9968cf_device* cam, int cid, int* val)
+{
+ struct ovcamchip_control ctl;
+ int err;
+
+ ctl.id = cid;
+
+ err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_G_CTRL, &ctl);
+ if (!err)
+ *val = ctl.value;
+
+ return err;
+}
+
+
+static int
+w9968cf_sensor_cmd(struct w9968cf_device* cam, unsigned int cmd, void* arg)
+{
+ struct i2c_client* c = cam->sensor_client;
+ int rc = 0;
+
+ if (!c || !c->driver || !c->driver->command)
+ return -EINVAL;
+
+ rc = c->driver->command(c, cmd, arg);
+ /* The I2C driver returns -EPERM on non-supported controls */
+ return (rc < 0 && rc != -EPERM) ? rc : 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Update some settings of the image sensor.
+ Returns: 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_sensor_update_settings(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ /* Auto brightness */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOBRIGHT,
+ cam->auto_brt);
+ if (err)
+ return err;
+
+ /* Auto exposure */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOEXP,
+ cam->auto_exp);
+ if (err)
+ return err;
+
+ /* Banding filter */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BANDFILT,
+ cam->bandfilt);
+ if (err)
+ return err;
+
+ /* Light frequency */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_FREQ,
+ cam->lightfreq);
+ if (err)
+ return err;
+
+ /* Back light */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BACKLIGHT,
+ cam->backlight);
+ if (err)
+ return err;
+
+ /* Mirror */
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_MIRROR,
+ cam->mirror);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Get some current picture settings from the image sensor and update the
+ internal 'picture' structure of the camera.
+ Returns: 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_sensor_get_picture(struct w9968cf_device* cam)
+{
+ int err, v;
+
+ err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_CONT, &v);
+ if (err)
+ return err;
+ cam->picture.contrast = v;
+
+ err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_BRIGHT, &v);
+ if (err)
+ return err;
+ cam->picture.brightness = v;
+
+ err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_SAT, &v);
+ if (err)
+ return err;
+ cam->picture.colour = v;
+
+ err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_HUE, &v);
+ if (err)
+ return err;
+ cam->picture.hue = v;
+
+ DBG(5, "Got picture settings from the image sensor")
+
+ PDBGG("Brightness, contrast, hue, colour, whiteness are "
+ "%u,%u,%u,%u,%u", cam->picture.brightness,cam->picture.contrast,
+ cam->picture.hue, cam->picture.colour, cam->picture.whiteness)
+
+ return 0;
+}
+
+
+/*--------------------------------------------------------------------------
+ Update picture settings of the image sensor.
+ Returns: 0 on success, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int
+w9968cf_sensor_update_picture(struct w9968cf_device* cam,
+ struct video_picture pict)
+{
+ int err = 0;
+
+ if ((!cam->sensor_initialized)
+ || pict.contrast != cam->picture.contrast) {
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_CONT,
+ pict.contrast);
+ if (err)
+ goto fail;
+ DBG(4, "Contrast changed from %u to %u",
+ cam->picture.contrast, pict.contrast)
+ cam->picture.contrast = pict.contrast;
+ }
+
+ if (((!cam->sensor_initialized) ||
+ pict.brightness != cam->picture.brightness) && (!cam->auto_brt)) {
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BRIGHT,
+ pict.brightness);
+ if (err)
+ goto fail;
+ DBG(4, "Brightness changed from %u to %u",
+ cam->picture.brightness, pict.brightness)
+ cam->picture.brightness = pict.brightness;
+ }
+
+ if ((!cam->sensor_initialized) || pict.colour != cam->picture.colour) {
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_SAT,
+ pict.colour);
+ if (err)
+ goto fail;
+ DBG(4, "Colour changed from %u to %u",
+ cam->picture.colour, pict.colour)
+ cam->picture.colour = pict.colour;
+ }
+
+ if ((!cam->sensor_initialized) || pict.hue != cam->picture.hue) {
+ err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_HUE,
+ pict.hue);
+ if (err)
+ goto fail;
+ DBG(4, "Hue changed from %u to %u",
+ cam->picture.hue, pict.hue)
+ cam->picture.hue = pict.hue;
+ }
+
+ return 0;
+
+fail:
+ DBG(4, "Failed to change sensor picture setting")
+ return err;
+}
+
+
+
+/****************************************************************************
+ * Camera configuration *
+ ****************************************************************************/
+
+/*--------------------------------------------------------------------------
+ This function is called when a supported image sensor is detected.
+ Return 0 if the initialization succeeds, a negative number otherwise.
+ --------------------------------------------------------------------------*/
+static int w9968cf_sensor_init(struct w9968cf_device* cam)
+{
+ int err = 0;
+
+ if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_INITIALIZE,
+ &cam->monochrome)))
+ goto error;
+
+ if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_Q_SUBTYPE,
+ &cam->sensor)))
+ goto error;
+
+ /* NOTE: Make sure width and height are a multiple of 16 */
+ switch (cam->sensor_client->addr) {
+ case OV6xx0_SID:
+ cam->maxwidth = 352;
+ cam->maxheight = 288;
+ cam->minwidth = 64;
+ cam->minheight = 48;
+ break;
+ case OV7xx0_SID:
+ cam->maxwidth = 640;
+ cam->maxheight = 480;
+ cam->minwidth = 64;
+ cam->minheight = 48;
+ break;
+ default:
+ DBG(1, "Not supported image sensor detected for %s",
+ symbolic(camlist, cam->id))
+ return -EINVAL;
+ }
+
+ /* These values depend on the ones in the ovxxx0.c sources */
+ switch (cam->sensor) {
+ case CC_OV7620:
+ cam->start_cropx = 287;
+ cam->start_cropy = 35;
+ /* Seems to work around a bug in the image sensor */
+ cam->vs_polarity = 1;
+ cam->hs_polarity = 1;
+ break;
+ default:
+ cam->start_cropx = 320;
+ cam->start_cropy = 35;
+ cam->vs_polarity = 1;
+ cam->hs_polarity = 0;
+ }
+
+ if ((err = w9968cf_sensor_update_settings(cam)))
+ goto error;
+
+ if ((err = w9968cf_sensor_update_picture(cam, cam->picture)))
+ goto error;
+
+ cam->sensor_initialized = 1;
+
+ DBG(2, "%s image sensor initialized", symbolic(senlist, cam->sensor))
+ return 0;
+
+error:
+ cam->sensor_initialized = 0;
+ cam->sensor = CC_UNKNOWN;
+ DBG(1, "Image sensor initialization failed for %s (/dev/video%d). "
+ "Try to detach and attach this device again",
+ symbolic(camlist, cam->id), cam->v4ldev->minor)
+ return err;
+}
+
+
+/*--------------------------------------------------------------------------
+ Fill some basic fields in the main device data structure.
+ This function is called once on w9968cf_usb_probe() for each recognized
+ camera.
+ --------------------------------------------------------------------------*/
+static void
+w9968cf_configure_camera(struct w9968cf_device* cam,
+ struct usb_device* udev,
+ enum w9968cf_model_id mod_id,
+ const unsigned short dev_nr)
+{
+ mutex_init(&cam->fileop_mutex);
+ init_waitqueue_head(&cam->open);
+ spin_lock_init(&cam->urb_lock);
+ spin_lock_init(&cam->flist_lock);
+
+ cam->users = 0;
+ cam->disconnected = 0;
+ cam->id = mod_id;
+ cam->sensor = CC_UNKNOWN;
+ cam->sensor_initialized = 0;
+
+ /* Calculate the alternate setting number (from 1 to 16)
+ according to the 'packet_size' module parameter */
+ if (packet_size[dev_nr] < W9968CF_MIN_PACKET_SIZE)
+ packet_size[dev_nr] = W9968CF_MIN_PACKET_SIZE;
+ for (cam->altsetting = 1;
+ packet_size[dev_nr] < wMaxPacketSize[cam->altsetting-1];
+ cam->altsetting++);
+
+ cam->max_buffers = (max_buffers[dev_nr] < 2 ||
+ max_buffers[dev_nr] > W9968CF_MAX_BUFFERS)
+ ? W9968CF_BUFFERS : (u8)max_buffers[dev_nr];
+
+ cam->double_buffer = (double_buffer[dev_nr] == 0 ||
+ double_buffer[dev_nr] == 1)
+ ? (u8)double_buffer[dev_nr]:W9968CF_DOUBLE_BUFFER;
+
+ cam->clamping = (clamping[dev_nr] == 0 || clamping[dev_nr] == 1)
+ ? (u8)clamping[dev_nr] : W9968CF_CLAMPING;
+
+ cam->filter_type = (filter_type[dev_nr] == 0 ||
+ filter_type[dev_nr] == 1 ||
+ filter_type[dev_nr] == 2)
+ ? (u8)filter_type[dev_nr] : W9968CF_FILTER_TYPE;
+
+ cam->capture = 1;
+
+ cam->largeview = (largeview[dev_nr] == 0 || largeview[dev_nr] == 1)
+ ? (u8)largeview[dev_nr] : W9968CF_LARGEVIEW;
+
+ cam->decompression = (decompression[dev_nr] == 0 ||
+ decompression[dev_nr] == 1 ||
+ decompression[dev_nr] == 2)
+ ? (u8)decompression[dev_nr]:W9968CF_DECOMPRESSION;
+
+ cam->upscaling = (upscaling[dev_nr] == 0 ||
+ upscaling[dev_nr] == 1)
+ ? (u8)upscaling[dev_nr] : W9968CF_UPSCALING;
+
+ cam->auto_brt = (autobright[dev_nr] == 0 || autobright[dev_nr] == 1)
+ ? (u8)autobright[dev_nr] : W9968CF_AUTOBRIGHT;
+
+ cam->auto_exp = (autoexp[dev_nr] == 0 || autoexp[dev_nr] == 1)
+ ? (u8)autoexp[dev_nr] : W9968CF_AUTOEXP;
+
+ cam->lightfreq = (lightfreq[dev_nr] == 50 || lightfreq[dev_nr] == 60)
+ ? (u8)lightfreq[dev_nr] : W9968CF_LIGHTFREQ;
+
+ cam->bandfilt = (bandingfilter[dev_nr] == 0 ||
+ bandingfilter[dev_nr] == 1)
+ ? (u8)bandingfilter[dev_nr] : W9968CF_BANDINGFILTER;
+
+ cam->backlight = (backlight[dev_nr] == 0 || backlight[dev_nr] == 1)
+ ? (u8)backlight[dev_nr] : W9968CF_BACKLIGHT;
+
+ cam->clockdiv = (clockdiv[dev_nr] == -1 || clockdiv[dev_nr] >= 0)
+ ? (s8)clockdiv[dev_nr] : W9968CF_CLOCKDIV;
+
+ cam->mirror = (mirror[dev_nr] == 0 || mirror[dev_nr] == 1)
+ ? (u8)mirror[dev_nr] : W9968CF_MIRROR;
+
+ cam->monochrome = (monochrome[dev_nr] == 0 || monochrome[dev_nr] == 1)
+ ? monochrome[dev_nr] : W9968CF_MONOCHROME;
+
+ cam->picture.brightness = (u16)brightness[dev_nr];
+ cam->picture.hue = (u16)hue[dev_nr];
+ cam->picture.colour = (u16)colour[dev_nr];
+ cam->picture.contrast = (u16)contrast[dev_nr];
+ cam->picture.whiteness = (u16)whiteness[dev_nr];
+ if (w9968cf_valid_palette((u16)force_palette[dev_nr])) {
+ cam->picture.palette = (u16)force_palette[dev_nr];
+ cam->force_palette = 1;
+ } else {
+ cam->force_palette = 0;
+ if (cam->decompression == 0)
+ cam->picture.palette = W9968CF_PALETTE_DECOMP_OFF;
+ else if (cam->decompression == 1)
+ cam->picture.palette = W9968CF_PALETTE_DECOMP_FORCE;
+ else
+ cam->picture.palette = W9968CF_PALETTE_DECOMP_ON;
+ }
+ cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
+
+ cam->force_rgb = (force_rgb[dev_nr] == 0 || force_rgb[dev_nr] == 1)
+ ? (u8)force_rgb[dev_nr] : W9968CF_FORCE_RGB;
+
+ cam->window.x = 0;
+ cam->window.y = 0;
+ cam->window.width = W9968CF_WIDTH;
+ cam->window.height = W9968CF_HEIGHT;
+ cam->window.chromakey = 0;
+ cam->window.clipcount = 0;
+ cam->window.flags = 0;
+
+ DBG(3, "%s configured with settings #%u:",
+ symbolic(camlist, cam->id), dev_nr)
+
+ DBG(3, "- Data packet size for USB isochrnous transfer: %u bytes",
+ wMaxPacketSize[cam->altsetting-1])
+
+ DBG(3, "- Number of requested video frame buffers: %u",
+ cam->max_buffers)
+
+ if (cam->double_buffer)
+ DBG(3, "- Hardware double buffering enabled")
+ else
+ DBG(3, "- Hardware double buffering disabled")
+
+ if (cam->filter_type == 0)
+ DBG(3, "- Video filtering disabled")
+ else if (cam->filter_type == 1)
+ DBG(3, "- Video filtering enabled: type 1-2-1")
+ else if (cam->filter_type == 2)
+ DBG(3, "- Video filtering enabled: type 2-3-6-3-2")
+
+ if (cam->clamping)
+ DBG(3, "- Video data clamping (CCIR-601 format) enabled")
+ else
+ DBG(3, "- Video data clamping (CCIR-601 format) disabled")
+
+ if (cam->largeview)
+ DBG(3, "- Large view enabled")
+ else
+ DBG(3, "- Large view disabled")
+
+ if ((cam->decompression) == 0 && (!cam->force_palette))
+ DBG(3, "- Decompression disabled")
+ else if ((cam->decompression) == 1 && (!cam->force_palette))
+ DBG(3, "- Decompression forced")
+ else if ((cam->decompression) == 2 && (!cam->force_palette))
+ DBG(3, "- Decompression allowed")
+
+ if (cam->upscaling)
+ DBG(3, "- Software image scaling enabled")
+ else
+ DBG(3, "- Software image scaling disabled")
+
+ if (cam->force_palette)
+ DBG(3, "- Image palette forced to %s",
+ symbolic(v4l1_plist, cam->picture.palette))
+
+ if (cam->force_rgb)
+ DBG(3, "- RGB component ordering will be used instead of BGR")
+
+ if (cam->auto_brt)
+ DBG(3, "- Auto brightness enabled")
+ else
+ DBG(3, "- Auto brightness disabled")
+
+ if (cam->auto_exp)
+ DBG(3, "- Auto exposure enabled")
+ else
+ DBG(3, "- Auto exposure disabled")
+
+ if (cam->backlight)
+ DBG(3, "- Backlight exposure algorithm enabled")
+ else
+ DBG(3, "- Backlight exposure algorithm disabled")
+
+ if (cam->mirror)
+ DBG(3, "- Mirror enabled")
+ else
+ DBG(3, "- Mirror disabled")
+
+ if (cam->bandfilt)
+ DBG(3, "- Banding filter enabled")
+ else
+ DBG(3, "- Banding filter disabled")
+
+ DBG(3, "- Power lighting frequency: %u", cam->lightfreq)
+
+ if (cam->clockdiv == -1)
+ DBG(3, "- Automatic clock divisor enabled")
+ else
+ DBG(3, "- Clock divisor: %d", cam->clockdiv)
+
+ if (cam->monochrome)
+ DBG(3, "- Image sensor used as monochrome")
+ else
+ DBG(3, "- Image sensor not used as monochrome")
+}
+
+
+/*--------------------------------------------------------------------------
+ If the video post-processing module is not loaded, some parameters
+ must be overridden.
+ --------------------------------------------------------------------------*/
+static void w9968cf_adjust_configuration(struct w9968cf_device* cam)
+{
+ if (!w9968cf_vpp) {
+ if (cam->decompression == 1) {
+ cam->decompression = 2;
+ DBG(2, "Video post-processing module not found: "
+ "'decompression' parameter forced to 2")
+ }
+ if (cam->upscaling) {
+ cam->upscaling = 0;
+ DBG(2, "Video post-processing module not found: "
+ "'upscaling' parameter forced to 0")
+ }
+ if (cam->picture.palette != VIDEO_PALETTE_UYVY) {
+ cam->force_palette = 0;
+ DBG(2, "Video post-processing module not found: "
+ "'force_palette' parameter forced to 0")
+ }
+ cam->picture.palette = VIDEO_PALETTE_UYVY;
+ cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
+ }
+}
+
+
+/*--------------------------------------------------------------------------
+ Release the resources used by the driver.
+ This function is called on disconnect
+ (or on close if deallocation has been deferred)
+ --------------------------------------------------------------------------*/
+static void w9968cf_release_resources(struct w9968cf_device* cam)
+{
+ mutex_lock(&w9968cf_devlist_mutex);
+
+ DBG(2, "V4L device deregistered: /dev/video%d", cam->v4ldev->minor)
+
+ video_unregister_device(cam->v4ldev);
+ list_del(&cam->v4llist);
+ i2c_del_adapter(&cam->i2c_adapter);
+ w9968cf_deallocate_memory(cam);
+ kfree(cam->control_buffer);
+ kfree(cam->data_buffer);
+
+ mutex_unlock(&w9968cf_devlist_mutex);
+}
+
+
+
+/****************************************************************************
+ * Video4Linux interface *
+ ****************************************************************************/
+
+static int w9968cf_open(struct inode* inode, struct file* filp)
+{
+ struct w9968cf_device* cam;
+ int err;
+
+ /* This the only safe way to prevent race conditions with disconnect */
+ if (!down_read_trylock(&w9968cf_disconnect))
+ return -ERESTARTSYS;
+
+ cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
+
+ mutex_lock(&cam->dev_mutex);
+
+ if (cam->sensor == CC_UNKNOWN) {
+ DBG(2, "No supported image sensor has been detected by the "
+ "'ovcamchip' module for the %s (/dev/video%d). Make "
+ "sure it is loaded *before* (re)connecting the camera.",
+ symbolic(camlist, cam->id), cam->v4ldev->minor)
+ mutex_unlock(&cam->dev_mutex);
+ up_read(&w9968cf_disconnect);
+ return -ENODEV;
+ }
+
+ if (cam->users) {
+ DBG(2, "%s (/dev/video%d) has been already occupied by '%s'",
+ symbolic(camlist, cam->id),cam->v4ldev->minor,cam->command)
+ if ((filp->f_flags & O_NONBLOCK)||(filp->f_flags & O_NDELAY)) {
+ mutex_unlock(&cam->dev_mutex);
+ up_read(&w9968cf_disconnect);
+ return -EWOULDBLOCK;
+ }
+ mutex_unlock(&cam->dev_mutex);
+ err = wait_event_interruptible_exclusive(cam->open,
+ cam->disconnected ||
+ !cam->users);
+ if (err) {
+ up_read(&w9968cf_disconnect);
+ return err;
+ }
+ if (cam->disconnected) {
+ up_read(&w9968cf_disconnect);
+ return -ENODEV;
+ }
+ mutex_lock(&cam->dev_mutex);
+ }
+
+ DBG(5, "Opening '%s', /dev/video%d ...",
+ symbolic(camlist, cam->id), cam->v4ldev->minor)
+
+ cam->streaming = 0;
+ cam->misconfigured = 0;
+
+ w9968cf_adjust_configuration(cam);
+
+ if ((err = w9968cf_allocate_memory(cam)))
+ goto deallocate_memory;
+
+ if ((err = w9968cf_init_chip(cam)))
+ goto deallocate_memory;
+
+ if ((err = w9968cf_start_transfer(cam)))
+ goto deallocate_memory;
+
+ filp->private_data = cam;
+
+ cam->users++;
+ strcpy(cam->command, current->comm);
+
+ init_waitqueue_head(&cam->wait_queue);
+
+ DBG(5, "Video device is open")
+
+ mutex_unlock(&cam->dev_mutex);
+ up_read(&w9968cf_disconnect);
+
+ return 0;
+
+deallocate_memory:
+ w9968cf_deallocate_memory(cam);
+ DBG(2, "Failed to open the video device")
+ mutex_unlock(&cam->dev_mutex);
+ up_read(&w9968cf_disconnect);
+ return err;
+}
+
+
+static int w9968cf_release(struct inode* inode, struct file* filp)
+{
+ struct w9968cf_device* cam;
+
+ cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
+
+ mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
+
+ w9968cf_stop_transfer(cam);
+
+ if (cam->disconnected) {
+ w9968cf_release_resources(cam);
+ mutex_unlock(&cam->dev_mutex);
+ kfree(cam);
+ return 0;
+ }
+
+ cam->users--;
+ w9968cf_deallocate_memory(cam);
+ wake_up_interruptible_nr(&cam->open, 1);
+
+ DBG(5, "Video device closed")
+ mutex_unlock(&cam->dev_mutex);
+ return 0;
+}
+
+
+static ssize_t
+w9968cf_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
+{
+ struct w9968cf_device* cam;
+ struct w9968cf_frame_t* fr;
+ int err = 0;
+
+ cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
+
+ if (filp->f_flags & O_NONBLOCK)
+ return -EWOULDBLOCK;
+
+ if (mutex_lock_interruptible(&cam->fileop_mutex))
+ return -ERESTARTSYS;
+
+ if (cam->disconnected) {
+ DBG(2, "Device not present")
+ mutex_unlock(&cam->fileop_mutex);
+ return -ENODEV;
+ }
+
+ if (cam->misconfigured) {
+ DBG(2, "The camera is misconfigured. Close and open it again.")
+ mutex_unlock(&cam->fileop_mutex);
+ return -EIO;
+ }
+
+ if (!cam->frame[0].queued)
+ w9968cf_push_frame(cam, 0);
+
+ if (!cam->frame[1].queued)
+ w9968cf_push_frame(cam, 1);
+
+ err = wait_event_interruptible(cam->wait_queue,
+ cam->frame[0].status == F_READY ||
+ cam->frame[1].status == F_READY ||
+ cam->disconnected);
+ if (err) {
+ mutex_unlock(&cam->fileop_mutex);
+ return err;
+ }
+ if (cam->disconnected) {
+ mutex_unlock(&cam->fileop_mutex);
+ return -ENODEV;
+ }
+
+ fr = (cam->frame[0].status == F_READY) ? &cam->frame[0]:&cam->frame[1];
+
+ if (w9968cf_vpp)
+ w9968cf_postprocess_frame(cam, fr);
+
+ if (count > fr->length)
+ count = fr->length;
+
+ if (copy_to_user(buf, fr->buffer, count)) {
+ fr->status = F_UNUSED;
+ mutex_unlock(&cam->fileop_mutex);
+ return -EFAULT;
+ }
+ *f_pos += count;
+
+ fr->status = F_UNUSED;
+
+ DBG(5, "%zu bytes read", count)
+
+ mutex_unlock(&cam->fileop_mutex);
+ return count;
+}
+
+
+static int w9968cf_mmap(struct file* filp, struct vm_area_struct *vma)
+{
+ struct w9968cf_device* cam = (struct w9968cf_device*)
+ video_get_drvdata(video_devdata(filp));
+ unsigned long vsize = vma->vm_end - vma->vm_start,
+ psize = cam->nbuffers * cam->frame[0].size,
+ start = vma->vm_start,
+ pos = (unsigned long)cam->frame[0].buffer,
+ page;
+
+ if (cam->disconnected) {
+ DBG(2, "Device not present")
+ return -ENODEV;
+ }
+
+ if (cam->misconfigured) {
+ DBG(2, "The camera is misconfigured. Close and open it again")
+ return -EIO;
+ }
+
+ PDBGG("mmapping %lu bytes...", vsize)
+
+ if (vsize > psize - (vma->vm_pgoff << PAGE_SHIFT))
+ return -EINVAL;
+
+ while (vsize > 0) {
+ page = vmalloc_to_pfn((void *)pos);
+ if (remap_pfn_range(vma, start, page + vma->vm_pgoff,
+ PAGE_SIZE, vma->vm_page_prot))
+ return -EAGAIN;
+ start += PAGE_SIZE;
+ pos += PAGE_SIZE;
+ vsize -= PAGE_SIZE;
+ }
+
+ DBG(5, "mmap method successfully called")
+ return 0;
+}
+
+
+static int
+w9968cf_ioctl(struct inode* inode, struct file* filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct w9968cf_device* cam;
+ int err;
+
+ cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
+
+ if (mutex_lock_interruptible(&cam->fileop_mutex))
+ return -ERESTARTSYS;
+
+ if (cam->disconnected) {
+ DBG(2, "Device not present")
+ mutex_unlock(&cam->fileop_mutex);
+ return -ENODEV;
+ }
+
+ if (cam->misconfigured) {
+ DBG(2, "The camera is misconfigured. Close and open it again.")
+ mutex_unlock(&cam->fileop_mutex);
+ return -EIO;
+ }
+
+ err = w9968cf_v4l_ioctl(inode, filp, cmd, (void __user *)arg);
+
+ mutex_unlock(&cam->fileop_mutex);
+ return err;
+}
+
+
+static int w9968cf_v4l_ioctl(struct inode* inode, struct file* filp,
+ unsigned int cmd, void __user * arg)
+{
+ struct w9968cf_device* cam;
+ const char* v4l1_ioctls[] = {
+ "?", "CGAP", "GCHAN", "SCHAN", "GTUNER", "STUNER",
+ "GPICT", "SPICT", "CCAPTURE", "GWIN", "SWIN", "GFBUF",
+ "SFBUF", "KEY", "GFREQ", "SFREQ", "GAUDIO", "SAUDIO",
+ "SYNC", "MCAPTURE", "GMBUF", "GUNIT", "GCAPTURE", "SCAPTURE",
+ "SPLAYMODE", "SWRITEMODE", "GPLAYINFO", "SMICROCODE",
+ "GVBIFMT", "SVBIFMT"
+ };
+
+ #define V4L1_IOCTL(cmd) \
+ ((_IOC_NR((cmd)) < ARRAY_SIZE(v4l1_ioctls)) ? \
+ v4l1_ioctls[_IOC_NR((cmd))] : "?")
+
+ cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
+
+ switch (cmd) {
+
+ case VIDIOCGCAP: /* get video capability */
+ {
+ struct video_capability cap = {
+ .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
+ .channels = 1,
+ .audios = 0,
+ .minwidth = cam->minwidth,
+ .minheight = cam->minheight,
+ };
+ sprintf(cap.name, "W996[87]CF USB Camera #%d",
+ cam->v4ldev->minor);
+ cap.maxwidth = (cam->upscaling && w9968cf_vpp)
+ ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
+ : cam->maxwidth;
+ cap.maxheight = (cam->upscaling && w9968cf_vpp)
+ ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
+ : cam->maxheight;
+
+ if (copy_to_user(arg, &cap, sizeof(cap)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGCAP successfully called")
+ return 0;
+ }
+
+ case VIDIOCGCHAN: /* get video channel informations */
+ {
+ struct video_channel chan;
+ if (copy_from_user(&chan, arg, sizeof(chan)))
+ return -EFAULT;
+
+ if (chan.channel != 0)
+ return -EINVAL;
+
+ strcpy(chan.name, "Camera");
+ chan.tuners = 0;
+ chan.flags = 0;
+ chan.type = VIDEO_TYPE_CAMERA;
+ chan.norm = VIDEO_MODE_AUTO;
+
+ if (copy_to_user(arg, &chan, sizeof(chan)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGCHAN successfully called")
+ return 0;
+ }
+
+ case VIDIOCSCHAN: /* set active channel */
+ {
+ struct video_channel chan;
+
+ if (copy_from_user(&chan, arg, sizeof(chan)))
+ return -EFAULT;
+
+ if (chan.channel != 0)
+ return -EINVAL;
+
+ DBG(5, "VIDIOCSCHAN successfully called")
+ return 0;
+ }
+
+ case VIDIOCGPICT: /* get image properties of the picture */
+ {
+ if (w9968cf_sensor_get_picture(cam))
+ return -EIO;
+
+ if (copy_to_user(arg, &cam->picture, sizeof(cam->picture)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGPICT successfully called")
+ return 0;
+ }
+
+ case VIDIOCSPICT: /* change picture settings */
+ {
+ struct video_picture pict;
+ int err = 0;
+
+ if (copy_from_user(&pict, arg, sizeof(pict)))
+ return -EFAULT;
+
+ if ( (cam->force_palette || !w9968cf_vpp)
+ && pict.palette != cam->picture.palette ) {
+ DBG(4, "Palette %s rejected: only %s is allowed",
+ symbolic(v4l1_plist, pict.palette),
+ symbolic(v4l1_plist, cam->picture.palette))
+ return -EINVAL;
+ }
+
+ if (!w9968cf_valid_palette(pict.palette)) {
+ DBG(4, "Palette %s not supported. VIDIOCSPICT failed",
+ symbolic(v4l1_plist, pict.palette))
+ return -EINVAL;
+ }
+
+ if (!cam->force_palette) {
+ if (cam->decompression == 0) {
+ if (w9968cf_need_decompression(pict.palette)) {
+ DBG(4, "Decompression disabled: palette %s is not "
+ "allowed. VIDIOCSPICT failed",
+ symbolic(v4l1_plist, pict.palette))
+ return -EINVAL;
+ }
+ } else if (cam->decompression == 1) {
+ if (!w9968cf_need_decompression(pict.palette)) {
+ DBG(4, "Decompression forced: palette %s is not "
+ "allowed. VIDIOCSPICT failed",
+ symbolic(v4l1_plist, pict.palette))
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (pict.depth != w9968cf_valid_depth(pict.palette)) {
+ DBG(4, "Requested depth %u bpp is not valid for %s "
+ "palette: ignored and changed to %u bpp",
+ pict.depth, symbolic(v4l1_plist, pict.palette),
+ w9968cf_valid_depth(pict.palette))
+ pict.depth = w9968cf_valid_depth(pict.palette);
+ }
+
+ if (pict.palette != cam->picture.palette) {
+ if(*cam->requested_frame
+ || cam->frame_current->queued) {
+ err = wait_event_interruptible
+ ( cam->wait_queue,
+ cam->disconnected ||
+ (!*cam->requested_frame &&
+ !cam->frame_current->queued) );
+ if (err)
+ return err;
+ if (cam->disconnected)
+ return -ENODEV;
+ }
+
+ if (w9968cf_stop_transfer(cam))
+ goto ioctl_fail;
+
+ if (w9968cf_set_picture(cam, pict))
+ goto ioctl_fail;
+
+ if (w9968cf_start_transfer(cam))
+ goto ioctl_fail;
+
+ } else if (w9968cf_sensor_update_picture(cam, pict))
+ return -EIO;
+
+
+ DBG(5, "VIDIOCSPICT successfully called")
+ return 0;
+ }
+
+ case VIDIOCSWIN: /* set capture area */
+ {
+ struct video_window win;
+ int err = 0;
+
+ if (copy_from_user(&win, arg, sizeof(win)))
+ return -EFAULT;
+
+ DBG(6, "VIDIOCSWIN called: clipcount=%d, flags=%u, "
+ "x=%u, y=%u, %ux%u", win.clipcount, win.flags,
+ win.x, win.y, win.width, win.height)
+
+ if (win.clipcount != 0 || win.flags != 0)
+ return -EINVAL;
+
+ if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
+ (u16*)&win.height))) {
+ DBG(4, "Resolution not supported (%ux%u). "
+ "VIDIOCSWIN failed", win.width, win.height)
+ return err;
+ }
+
+ if (win.x != cam->window.x ||
+ win.y != cam->window.y ||
+ win.width != cam->window.width ||
+ win.height != cam->window.height) {
+ if(*cam->requested_frame
+ || cam->frame_current->queued) {
+ err = wait_event_interruptible
+ ( cam->wait_queue,
+ cam->disconnected ||
+ (!*cam->requested_frame &&
+ !cam->frame_current->queued) );
+ if (err)
+ return err;
+ if (cam->disconnected)
+ return -ENODEV;
+ }
+
+ if (w9968cf_stop_transfer(cam))
+ goto ioctl_fail;
+
+ /* This _must_ be called before set_window() */
+ if (w9968cf_set_picture(cam, cam->picture))
+ goto ioctl_fail;
+
+ if (w9968cf_set_window(cam, win))
+ goto ioctl_fail;
+
+ if (w9968cf_start_transfer(cam))
+ goto ioctl_fail;
+ }
+
+ DBG(5, "VIDIOCSWIN successfully called. ")
+ return 0;
+ }
+
+ case VIDIOCGWIN: /* get current window properties */
+ {
+ if (copy_to_user(arg,&cam->window,sizeof(struct video_window)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGWIN successfully called")
+ return 0;
+ }
+
+ case VIDIOCGMBUF: /* request for memory (mapped) buffer */
+ {
+ struct video_mbuf mbuf;
+ u8 i;
+
+ mbuf.size = cam->nbuffers * cam->frame[0].size;
+ mbuf.frames = cam->nbuffers;
+ for (i = 0; i < cam->nbuffers; i++)
+ mbuf.offsets[i] = (unsigned long)cam->frame[i].buffer -
+ (unsigned long)cam->frame[0].buffer;
+
+ if (copy_to_user(arg, &mbuf, sizeof(mbuf)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGMBUF successfully called")
+ return 0;
+ }
+
+ case VIDIOCMCAPTURE: /* start the capture to a frame */
+ {
+ struct video_mmap mmap;
+ struct w9968cf_frame_t* fr;
+ int err = 0;
+
+ if (copy_from_user(&mmap, arg, sizeof(mmap)))
+ return -EFAULT;
+
+ DBG(6, "VIDIOCMCAPTURE called: frame #%u, format=%s, %dx%d",
+ mmap.frame, symbolic(v4l1_plist, mmap.format),
+ mmap.width, mmap.height)
+
+ if (mmap.frame >= cam->nbuffers) {
+ DBG(4, "Invalid frame number (%u). "
+ "VIDIOCMCAPTURE failed", mmap.frame)
+ return -EINVAL;
+ }
+
+ if (mmap.format!=cam->picture.palette &&
+ (cam->force_palette || !w9968cf_vpp)) {
+ DBG(4, "Palette %s rejected: only %s is allowed",
+ symbolic(v4l1_plist, mmap.format),
+ symbolic(v4l1_plist, cam->picture.palette))
+ return -EINVAL;
+ }
+
+ if (!w9968cf_valid_palette(mmap.format)) {
+ DBG(4, "Palette %s not supported. "
+ "VIDIOCMCAPTURE failed",
+ symbolic(v4l1_plist, mmap.format))
+ return -EINVAL;
+ }
+
+ if (!cam->force_palette) {
+ if (cam->decompression == 0) {
+ if (w9968cf_need_decompression(mmap.format)) {
+ DBG(4, "Decompression disabled: palette %s is not "
+ "allowed. VIDIOCSPICT failed",
+ symbolic(v4l1_plist, mmap.format))
+ return -EINVAL;
+ }
+ } else if (cam->decompression == 1) {
+ if (!w9968cf_need_decompression(mmap.format)) {
+ DBG(4, "Decompression forced: palette %s is not "
+ "allowed. VIDIOCSPICT failed",
+ symbolic(v4l1_plist, mmap.format))
+ return -EINVAL;
+ }
+ }
+ }
+
+ if ((err = w9968cf_adjust_window_size(cam, (u16*)&mmap.width,
+ (u16*)&mmap.height))) {
+ DBG(4, "Resolution not supported (%dx%d). "
+ "VIDIOCMCAPTURE failed",
+ mmap.width, mmap.height)
+ return err;
+ }
+
+ fr = &cam->frame[mmap.frame];
+
+ if (mmap.width != cam->window.width ||
+ mmap.height != cam->window.height ||
+ mmap.format != cam->picture.palette) {
+
+ struct video_window win;
+ struct video_picture pict;
+
+ if(*cam->requested_frame
+ || cam->frame_current->queued) {
+ DBG(6, "VIDIOCMCAPTURE. Change settings for "
+ "frame #%u: %dx%d, format %s. Wait...",
+ mmap.frame, mmap.width, mmap.height,
+ symbolic(v4l1_plist, mmap.format))
+ err = wait_event_interruptible
+ ( cam->wait_queue,
+ cam->disconnected ||
+ (!*cam->requested_frame &&
+ !cam->frame_current->queued) );
+ if (err)
+ return err;
+ if (cam->disconnected)
+ return -ENODEV;
+ }
+
+ memcpy(&win, &cam->window, sizeof(win));
+ memcpy(&pict, &cam->picture, sizeof(pict));
+ win.width = mmap.width;
+ win.height = mmap.height;
+ pict.palette = mmap.format;
+
+ if (w9968cf_stop_transfer(cam))
+ goto ioctl_fail;
+
+ /* This before set_window */
+ if (w9968cf_set_picture(cam, pict))
+ goto ioctl_fail;
+
+ if (w9968cf_set_window(cam, win))
+ goto ioctl_fail;
+
+ if (w9968cf_start_transfer(cam))
+ goto ioctl_fail;
+
+ } else if (fr->queued) {
+
+ DBG(6, "Wait until frame #%u is free", mmap.frame)
+
+ err = wait_event_interruptible(cam->wait_queue,
+ cam->disconnected ||
+ (!fr->queued));
+ if (err)
+ return err;
+ if (cam->disconnected)
+ return -ENODEV;
+ }
+
+ w9968cf_push_frame(cam, mmap.frame);
+ DBG(5, "VIDIOCMCAPTURE(%u): successfully called", mmap.frame)
+ return 0;
+ }
+
+ case VIDIOCSYNC: /* wait until the capture of a frame is finished */
+ {
+ unsigned int f_num;
+ struct w9968cf_frame_t* fr;
+ int err = 0;
+
+ if (copy_from_user(&f_num, arg, sizeof(f_num)))
+ return -EFAULT;
+
+ if (f_num >= cam->nbuffers) {
+ DBG(4, "Invalid frame number (%u). "
+ "VIDIOCMCAPTURE failed", f_num)
+ return -EINVAL;
+ }
+
+ DBG(6, "VIDIOCSYNC called for frame #%u", f_num)
+
+ fr = &cam->frame[f_num];
+
+ switch (fr->status) {
+ case F_UNUSED:
+ if (!fr->queued) {
+ DBG(4, "VIDIOSYNC: Frame #%u not requested!",
+ f_num)
+ return -EFAULT;
+ }
+ case F_ERROR:
+ case F_GRABBING:
+ err = wait_event_interruptible(cam->wait_queue,
+ (fr->status == F_READY)
+ || cam->disconnected);
+ if (err)
+ return err;
+ if (cam->disconnected)
+ return -ENODEV;
+ break;
+ case F_READY:
+ break;
+ }
+
+ if (w9968cf_vpp)
+ w9968cf_postprocess_frame(cam, fr);
+
+ fr->status = F_UNUSED;
+
+ DBG(5, "VIDIOCSYNC(%u) successfully called", f_num)
+ return 0;
+ }
+
+ case VIDIOCGUNIT:/* report the unit numbers of the associated devices*/
+ {
+ struct video_unit unit = {
+ .video = cam->v4ldev->minor,
+ .vbi = VIDEO_NO_UNIT,
+ .radio = VIDEO_NO_UNIT,
+ .audio = VIDEO_NO_UNIT,
+ .teletext = VIDEO_NO_UNIT,
+ };
+
+ if (copy_to_user(arg, &unit, sizeof(unit)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGUNIT successfully called")
+ return 0;
+ }
+
+ case VIDIOCKEY:
+ return 0;
+
+ case VIDIOCGFBUF:
+ {
+ if (clear_user(arg, sizeof(struct video_buffer)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGFBUF successfully called")
+ return 0;
+ }
+
+ case VIDIOCGTUNER:
+ {
+ struct video_tuner tuner;
+ if (copy_from_user(&tuner, arg, sizeof(tuner)))
+ return -EFAULT;
+
+ if (tuner.tuner != 0)
+ return -EINVAL;
+
+ strcpy(tuner.name, "no_tuner");
+ tuner.rangelow = 0;
+ tuner.rangehigh = 0;
+ tuner.flags = VIDEO_TUNER_NORM;
+ tuner.mode = VIDEO_MODE_AUTO;
+ tuner.signal = 0xffff;
+
+ if (copy_to_user(arg, &tuner, sizeof(tuner)))
+ return -EFAULT;
+
+ DBG(5, "VIDIOCGTUNER successfully called")
+ return 0;
+ }
+
+ case VIDIOCSTUNER:
+ {
+ struct video_tuner tuner;
+ if (copy_from_user(&tuner, arg, sizeof(tuner)))
+ return -EFAULT;
+
+ if (tuner.tuner != 0)
+ return -EINVAL;
+
+ if (tuner.mode != VIDEO_MODE_AUTO)
+ return -EINVAL;
+
+ DBG(5, "VIDIOCSTUNER successfully called")
+ return 0;
+ }
+
+ case VIDIOCSFBUF:
+ case VIDIOCCAPTURE:
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ case VIDIOCSPLAYMODE:
+ case VIDIOCSWRITEMODE:
+ case VIDIOCGPLAYINFO:
+ case VIDIOCSMICROCODE:
+ case VIDIOCGVBIFMT:
+ case VIDIOCSVBIFMT:
+ DBG(4, "Unsupported V4L1 IOCtl: VIDIOC%s "
+ "(type 0x%01X, "
+ "n. 0x%01X, "
+ "dir. 0x%01X, "
+ "size 0x%02X)",
+ V4L1_IOCTL(cmd),
+ _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
+
+ return -EINVAL;
+
+ default:
+ DBG(4, "Invalid V4L1 IOCtl: VIDIOC%s "
+ "type 0x%01X, "
+ "n. 0x%01X, "
+ "dir. 0x%01X, "
+ "size 0x%02X",
+ V4L1_IOCTL(cmd),
+ _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
+
+ return -ENOIOCTLCMD;
+
+ } /* end of switch */
+
+ioctl_fail:
+ cam->misconfigured = 1;
+ DBG(1, "VIDIOC%s failed because of hardware problems. "
+ "To use the camera, close and open it again.", V4L1_IOCTL(cmd))
+ return -EFAULT;
+}
+
+
+static struct file_operations w9968cf_fops = {
+ .owner = THIS_MODULE,
+ .open = w9968cf_open,
+ .release = w9968cf_release,
+ .read = w9968cf_read,
+ .ioctl = w9968cf_ioctl,
+ .compat_ioctl = v4l_compat_ioctl32,
+ .mmap = w9968cf_mmap,
+ .llseek = no_llseek,
+};
+
+
+
+/****************************************************************************
+ * USB probe and V4L registration, disconnect and id_table[] definition *
+ ****************************************************************************/
+
+static int
+w9968cf_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct w9968cf_device* cam;
+ int err = 0;
+ enum w9968cf_model_id mod_id;
+ struct list_head* ptr;
+ u8 sc = 0; /* number of simultaneous cameras */
+ static unsigned short dev_nr = 0; /* we are handling device number n */
+
+ if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[0].idVendor &&
+ le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[0].idProduct)
+ mod_id = W9968CF_MOD_CLVBWGP; /* see camlist[] table */
+ else if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[1].idVendor &&
+ le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[1].idProduct)
+ mod_id = W9968CF_MOD_GENERIC; /* see camlist[] table */
+ else
+ return -ENODEV;
+
+ cam = (struct w9968cf_device*)
+ kzalloc(sizeof(struct w9968cf_device), GFP_KERNEL);
+ if (!cam)
+ return -ENOMEM;
+
+ mutex_init(&cam->dev_mutex);
+ mutex_lock(&cam->dev_mutex);
+
+ cam->usbdev = udev;
+ /* NOTE: a local copy is used to avoid possible race conditions */
+ memcpy(&cam->dev, &udev->dev, sizeof(struct device));
+
+ DBG(2, "%s detected", symbolic(camlist, mod_id))
+
+ if (simcams > W9968CF_MAX_DEVICES)
+ simcams = W9968CF_SIMCAMS;
+
+ /* How many cameras are connected ? */
+ mutex_lock(&w9968cf_devlist_mutex);
+ list_for_each(ptr, &w9968cf_dev_list)
+ sc++;
+ mutex_unlock(&w9968cf_devlist_mutex);
+
+ if (sc >= simcams) {
+ DBG(2, "Device rejected: too many connected cameras "
+ "(max. %u)", simcams)
+ err = -EPERM;
+ goto fail;
+ }
+
+
+ /* Allocate 2 bytes of memory for camera control USB transfers */
+ if (!(cam->control_buffer = kzalloc(2, GFP_KERNEL))) {
+ DBG(1,"Couldn't allocate memory for camera control transfers")
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ /* Allocate 8 bytes of memory for USB data transfers to the FSB */
+ if (!(cam->data_buffer = kzalloc(8, GFP_KERNEL))) {
+ DBG(1, "Couldn't allocate memory for data "
+ "transfers to the FSB")
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ /* Register the V4L device */
+ cam->v4ldev = video_device_alloc();
+ if (!cam->v4ldev) {
+ DBG(1, "Could not allocate memory for a V4L structure")
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ strcpy(cam->v4ldev->name, symbolic(camlist, mod_id));
+ cam->v4ldev->owner = THIS_MODULE;
+ cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
+ cam->v4ldev->hardware = VID_HARDWARE_W9968CF;
+ cam->v4ldev->fops = &w9968cf_fops;
+ cam->v4ldev->minor = video_nr[dev_nr];
+ cam->v4ldev->release = video_device_release;
+ video_set_drvdata(cam->v4ldev, cam);
+ cam->v4ldev->dev = &cam->dev;
+
+ err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
+ video_nr[dev_nr]);
+ if (err) {
+ DBG(1, "V4L device registration failed")
+ if (err == -ENFILE && video_nr[dev_nr] == -1)
+ DBG(2, "Couldn't find a free /dev/videoX node")
+ video_nr[dev_nr] = -1;
+ dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
+ goto fail;
+ }
+
+ DBG(2, "V4L device registered as /dev/video%d", cam->v4ldev->minor)
+
+ /* Set some basic constants */
+ w9968cf_configure_camera(cam, udev, mod_id, dev_nr);
+
+ /* Add a new entry into the list of V4L registered devices */
+ mutex_lock(&w9968cf_devlist_mutex);
+ list_add(&cam->v4llist, &w9968cf_dev_list);
+ mutex_unlock(&w9968cf_devlist_mutex);
+ dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
+
+ w9968cf_turn_on_led(cam);
+
+ w9968cf_i2c_init(cam);
+
+ usb_set_intfdata(intf, cam);
+ mutex_unlock(&cam->dev_mutex);
+ return 0;
+
+fail: /* Free unused memory */
+ kfree(cam->control_buffer);
+ kfree(cam->data_buffer);
+ if (cam->v4ldev)
+ video_device_release(cam->v4ldev);
+ mutex_unlock(&cam->dev_mutex);
+ kfree(cam);
+ return err;
+}
+
+
+static void w9968cf_usb_disconnect(struct usb_interface* intf)
+{
+ struct w9968cf_device* cam =
+ (struct w9968cf_device*)usb_get_intfdata(intf);
+
+ down_write(&w9968cf_disconnect);
+
+ if (cam) {
+ /* Prevent concurrent accesses to data */
+ mutex_lock(&cam->dev_mutex);
+
+ cam->disconnected = 1;
+
+ DBG(2, "Disconnecting %s...", symbolic(camlist, cam->id))
+
+ wake_up_interruptible_all(&cam->open);
+
+ if (cam->users) {
+ DBG(2, "The device is open (/dev/video%d)! "
+ "Process name: %s. Deregistration and memory "
+ "deallocation are deferred on close.",
+ cam->v4ldev->minor, cam->command)
+ cam->misconfigured = 1;
+ w9968cf_stop_transfer(cam);
+ wake_up_interruptible(&cam->wait_queue);
+ } else
+ w9968cf_release_resources(cam);
+
+ mutex_unlock(&cam->dev_mutex);
+
+ if (!cam->users)
+ kfree(cam);
+ }
+
+ up_write(&w9968cf_disconnect);
+}
+
+
+static struct usb_driver w9968cf_usb_driver = {
+ .name = "w9968cf",
+ .id_table = winbond_id_table,
+ .probe = w9968cf_usb_probe,
+ .disconnect = w9968cf_usb_disconnect,
+};
+
+
+
+/****************************************************************************
+ * Module init, exit and intermodule communication *
+ ****************************************************************************/
+
+static int __init w9968cf_module_init(void)
+{
+ int err;
+
+ KDBG(2, W9968CF_MODULE_NAME" "W9968CF_MODULE_VERSION)
+ KDBG(3, W9968CF_MODULE_AUTHOR)
+
+ if (ovmod_load)
+ request_module("ovcamchip");
+
+ if ((err = usb_register(&w9968cf_usb_driver)))
+ return err;
+
+ return 0;
+}
+
+
+static void __exit w9968cf_module_exit(void)
+{
+ /* w9968cf_usb_disconnect() will be called */
+ usb_deregister(&w9968cf_usb_driver);
+
+ KDBG(2, W9968CF_MODULE_NAME" deregistered")
+}
+
+
+module_init(w9968cf_module_init);
+module_exit(w9968cf_module_exit);
+
git://git.onelab.eu / linux-2.6.git / blobdiff