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Diffstat (limited to 'drivers/usb/media/w9968cf.c')
| -rw-r--r-- | drivers/usb/media/w9968cf.c | 3691 |
1 files changed, 0 insertions, 3691 deletions
diff --git a/drivers/usb/media/w9968cf.c b/drivers/usb/media/w9968cf.c deleted file mode 100644 index b57dec3782e..00000000000 --- a/drivers/usb/media/w9968cf.c +++ /dev/null @@ -1,3691 +0,0 @@ -/*************************************************************************** - * 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); - |