1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* (C) 1999-2003 Nemosoft Unv.
3    (C) 2004-2006 Luc Saillard (luc@saillard.org)
4 
5    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
6    driver and thus may have bugs that are not present in the original version.
7    Please send bug reports and support requests to <luc@saillard.org>.
8    The decompression routines have been implemented by reverse-engineering the
9    Nemosoft binary pwcx module. Caveat emptor.
10 
11 */
12 
13 #ifndef PWC_H
14 #define PWC_H
15 
16 #include <linux/module.h>
17 #include <linux/usb.h>
18 #include <linux/spinlock.h>
19 #include <linux/wait.h>
20 #include <linux/mutex.h>
21 #include <linux/mm.h>
22 #include <linux/slab.h>
23 #include <asm/errno.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-ctrls.h>
29 #include <media/v4l2-fh.h>
30 #include <media/v4l2-event.h>
31 #include <media/videobuf2-v4l2.h>
32 #include <media/videobuf2-vmalloc.h>
33 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
34 #include <linux/input.h>
35 #endif
36 #include "pwc-dec1.h"
37 #include "pwc-dec23.h"
38 
39 /* Version block */
40 #define PWC_VERSION	"10.0.15"
41 #define PWC_NAME	"pwc"
42 #define PFX		PWC_NAME ": "
43 
44 
45 /* Trace certain actions in the driver */
46 #define PWC_DEBUG_LEVEL_MODULE	BIT(0)
47 #define PWC_DEBUG_LEVEL_PROBE	BIT(1)
48 #define PWC_DEBUG_LEVEL_OPEN	BIT(2)
49 #define PWC_DEBUG_LEVEL_READ	BIT(3)
50 #define PWC_DEBUG_LEVEL_MEMORY	BIT(4)
51 #define PWC_DEBUG_LEVEL_FLOW	BIT(5)
52 #define PWC_DEBUG_LEVEL_SIZE	BIT(6)
53 #define PWC_DEBUG_LEVEL_IOCTL	BIT(7)
54 #define PWC_DEBUG_LEVEL_TRACE	BIT(8)
55 
56 #define PWC_DEBUG_MODULE(fmt, args...) PWC_DEBUG(MODULE, fmt, ##args)
57 #define PWC_DEBUG_PROBE(fmt, args...) PWC_DEBUG(PROBE, fmt, ##args)
58 #define PWC_DEBUG_OPEN(fmt, args...) PWC_DEBUG(OPEN, fmt, ##args)
59 #define PWC_DEBUG_READ(fmt, args...) PWC_DEBUG(READ, fmt, ##args)
60 #define PWC_DEBUG_MEMORY(fmt, args...) PWC_DEBUG(MEMORY, fmt, ##args)
61 #define PWC_DEBUG_FLOW(fmt, args...) PWC_DEBUG(FLOW, fmt, ##args)
62 #define PWC_DEBUG_SIZE(fmt, args...) PWC_DEBUG(SIZE, fmt, ##args)
63 #define PWC_DEBUG_IOCTL(fmt, args...) PWC_DEBUG(IOCTL, fmt, ##args)
64 #define PWC_DEBUG_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
65 
66 
67 #ifdef CONFIG_USB_PWC_DEBUG
68 
69 #define PWC_DEBUG_LEVEL	(PWC_DEBUG_LEVEL_MODULE)
70 
71 #define PWC_DEBUG(level, fmt, args...) do {\
72 	if ((PWC_DEBUG_LEVEL_ ##level) & pwc_trace) \
73 		printk(KERN_DEBUG PFX fmt, ##args); \
74 	} while (0)
75 
76 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
77 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
78 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
79 #define PWC_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
80 
81 #else /* if ! CONFIG_USB_PWC_DEBUG */
82 
83 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
84 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
85 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
86 #define PWC_TRACE(fmt, args...) do { } while(0)
87 #define PWC_DEBUG(level, fmt, args...) do { } while(0)
88 
89 #define pwc_trace 0
90 
91 #endif
92 
93 /* Defines for ToUCam cameras */
94 #define TOUCAM_HEADER_SIZE		8
95 #define TOUCAM_TRAILER_SIZE		4
96 
97 #define FEATURE_MOTOR_PANTILT		0x0001
98 #define FEATURE_CODEC1			0x0002
99 #define FEATURE_CODEC2			0x0004
100 
101 #define MAX_WIDTH		640
102 #define MAX_HEIGHT		480
103 
104 /* Ignore errors in the first N frames, to allow for startup delays */
105 #define FRAME_LOWMARK 5
106 
107 /* Size and number of buffers for the ISO pipe. */
108 #define MAX_ISO_BUFS		3
109 #define ISO_FRAMES_PER_DESC	10
110 #define ISO_MAX_FRAME_SIZE	960
111 #define ISO_BUFFER_SIZE		(ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
112 
113 /* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
114 #define PWC_FRAME_SIZE		(460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
115 
116 /* Absolute minimum and maximum number of buffers available for mmap() */
117 #define MIN_FRAMES		2
118 #define MAX_FRAMES		16
119 
120 /* Some macros to quickly find the type of a webcam */
121 #define DEVICE_USE_CODEC1(x) ((x)<675)
122 #define DEVICE_USE_CODEC2(x) ((x)>=675 && (x)<700)
123 #define DEVICE_USE_CODEC3(x) ((x)>=700)
124 #define DEVICE_USE_CODEC23(x) ((x)>=675)
125 
126 /* Request types: video */
127 #define SET_LUM_CTL			0x01
128 #define GET_LUM_CTL			0x02
129 #define SET_CHROM_CTL			0x03
130 #define GET_CHROM_CTL			0x04
131 #define SET_STATUS_CTL			0x05
132 #define GET_STATUS_CTL			0x06
133 #define SET_EP_STREAM_CTL		0x07
134 #define GET_EP_STREAM_CTL		0x08
135 #define GET_XX_CTL			0x09
136 #define SET_XX_CTL			0x0A
137 #define GET_XY_CTL			0x0B
138 #define SET_XY_CTL			0x0C
139 #define SET_MPT_CTL			0x0D
140 #define GET_MPT_CTL			0x0E
141 
142 /* Selectors for the Luminance controls [GS]ET_LUM_CTL */
143 #define AGC_MODE_FORMATTER			0x2000
144 #define PRESET_AGC_FORMATTER			0x2100
145 #define SHUTTER_MODE_FORMATTER			0x2200
146 #define PRESET_SHUTTER_FORMATTER		0x2300
147 #define PRESET_CONTOUR_FORMATTER		0x2400
148 #define AUTO_CONTOUR_FORMATTER			0x2500
149 #define BACK_LIGHT_COMPENSATION_FORMATTER	0x2600
150 #define CONTRAST_FORMATTER			0x2700
151 #define DYNAMIC_NOISE_CONTROL_FORMATTER		0x2800
152 #define FLICKERLESS_MODE_FORMATTER		0x2900
153 #define AE_CONTROL_SPEED			0x2A00
154 #define BRIGHTNESS_FORMATTER			0x2B00
155 #define GAMMA_FORMATTER				0x2C00
156 
157 /* Selectors for the Chrominance controls [GS]ET_CHROM_CTL */
158 #define WB_MODE_FORMATTER			0x1000
159 #define AWB_CONTROL_SPEED_FORMATTER		0x1100
160 #define AWB_CONTROL_DELAY_FORMATTER		0x1200
161 #define PRESET_MANUAL_RED_GAIN_FORMATTER	0x1300
162 #define PRESET_MANUAL_BLUE_GAIN_FORMATTER	0x1400
163 #define COLOUR_MODE_FORMATTER			0x1500
164 #define SATURATION_MODE_FORMATTER1		0x1600
165 #define SATURATION_MODE_FORMATTER2		0x1700
166 
167 /* Selectors for the Status controls [GS]ET_STATUS_CTL */
168 #define SAVE_USER_DEFAULTS_FORMATTER		0x0200
169 #define RESTORE_USER_DEFAULTS_FORMATTER		0x0300
170 #define RESTORE_FACTORY_DEFAULTS_FORMATTER	0x0400
171 #define READ_AGC_FORMATTER			0x0500
172 #define READ_SHUTTER_FORMATTER			0x0600
173 #define READ_RED_GAIN_FORMATTER			0x0700
174 #define READ_BLUE_GAIN_FORMATTER		0x0800
175 
176 /* Formatters for the motorized pan & tilt [GS]ET_MPT_CTL */
177 #define PT_RELATIVE_CONTROL_FORMATTER		0x01
178 #define PT_RESET_CONTROL_FORMATTER		0x02
179 #define PT_STATUS_FORMATTER			0x03
180 
181 /* Enumeration of image sizes */
182 #define PSZ_SQCIF	0x00
183 #define PSZ_QSIF	0x01
184 #define PSZ_QCIF	0x02
185 #define PSZ_SIF		0x03
186 #define PSZ_CIF		0x04
187 #define PSZ_VGA		0x05
188 #define PSZ_MAX		6
189 
190 struct pwc_raw_frame {
191 	__le16 type;		/* type of the webcam */
192 	__le16 vbandlength;	/* Size of 4 lines compressed (used by the
193 				   decompressor) */
194 	__u8   cmd[4];		/* the four byte of the command (in case of
195 				   nala, only the first 3 bytes is filled) */
196 	__u8   rawframe[];	/* frame_size = H / 4 * vbandlength */
197 } __packed;
198 
199 /* intermediate buffers with raw data from the USB cam */
200 struct pwc_frame_buf
201 {
202 	/* common v4l buffer stuff -- must be first */
203 	struct vb2_v4l2_buffer vb;
204 	struct list_head list;
205 	void *data;
206 	int filled;		/* number of bytes filled */
207 };
208 
209 struct pwc_device
210 {
211 	struct video_device vdev;
212 	struct v4l2_device v4l2_dev;
213 
214 	/* videobuf2 queue and queued buffers list */
215 	struct vb2_queue vb_queue;
216 	struct list_head queued_bufs;
217 	spinlock_t queued_bufs_lock; /* Protects queued_bufs */
218 
219 	/* If taking both locks vb_queue_lock must always be locked first! */
220 	struct mutex v4l2_lock;      /* Protects everything else */
221 	struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
222 
223 	/* Pointer to our usb_device, will be NULL after unplug */
224 	struct usb_device *udev; /* Both mutexes most be hold when setting! */
225 
226 	/* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
227 	int type;
228 	int release;		/* release number */
229 	int features;		/* feature bits */
230 
231 	/*** Video data ***/
232 	int vendpoint;		/* video isoc endpoint */
233 	int vcinterface;	/* video control interface */
234 	int valternate;		/* alternate interface needed */
235 	int vframes;		/* frames-per-second */
236 	int pixfmt;		/* pixelformat: V4L2_PIX_FMT_YUV420 or _PWCX */
237 	int vframe_count;	/* received frames */
238 	int vmax_packet_size;	/* USB maxpacket size */
239 	int vlast_packet_size;	/* for frame synchronisation */
240 	int visoc_errors;	/* number of contiguous ISOC errors */
241 	int vbandlength;	/* compressed band length; 0 is uncompressed */
242 	char vsync;		/* used by isoc handler */
243 	char vmirror;		/* for ToUCaM series */
244 	char power_save;	/* Do powersaving for this cam */
245 
246 	unsigned char cmd_buf[13];
247 	unsigned char *ctrl_buf;
248 
249 	struct urb *urbs[MAX_ISO_BUFS];
250 
251 	/*
252 	 * Frame currently being filled, this only gets touched by the
253 	 * isoc urb complete handler, and by stream start / stop since
254 	 * start / stop touch it before / after starting / killing the urbs
255 	 * no locking is needed around this
256 	 */
257 	struct pwc_frame_buf *fill_buf;
258 
259 	int frame_header_size, frame_trailer_size;
260 	int frame_size;
261 	int frame_total_size;	/* including header & trailer */
262 	int drop_frames;
263 
264 	union {	/* private data for decompression engine */
265 		struct pwc_dec1_private dec1;
266 		struct pwc_dec23_private dec23;
267 	};
268 
269 	/*
270 	 * We have an 'image' and a 'view', where 'image' is the fixed-size img
271 	 * as delivered by the camera, and 'view' is the size requested by the
272 	 * program. The camera image is centered in this viewport, laced with
273 	 * a gray or black border. view_min <= image <= view <= view_max;
274 	 */
275 	int image_mask;				/* supported sizes */
276 	int width, height;			/* current resolution */
277 
278 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
279 	struct input_dev *button_dev;	/* webcam snapshot button input */
280 	char button_phys[64];
281 #endif
282 
283 	/* controls */
284 	struct v4l2_ctrl_handler	ctrl_handler;
285 	u16				saturation_fmt;
286 	struct v4l2_ctrl		*brightness;
287 	struct v4l2_ctrl		*contrast;
288 	struct v4l2_ctrl		*saturation;
289 	struct v4l2_ctrl		*gamma;
290 	struct {
291 		/* awb / red-blue balance cluster */
292 		struct v4l2_ctrl	*auto_white_balance;
293 		struct v4l2_ctrl	*red_balance;
294 		struct v4l2_ctrl	*blue_balance;
295 		/* usb ctrl transfers are slow, so we cache things */
296 		int			color_bal_valid;
297 		unsigned long		last_color_bal_update; /* In jiffies */
298 		s32			last_red_balance;
299 		s32			last_blue_balance;
300 	};
301 	struct {
302 		/* autogain / gain cluster */
303 		struct v4l2_ctrl	*autogain;
304 		struct v4l2_ctrl	*gain;
305 		int			gain_valid;
306 		unsigned long		last_gain_update; /* In jiffies */
307 		s32			last_gain;
308 	};
309 	struct {
310 		/* exposure_auto / exposure cluster */
311 		struct v4l2_ctrl	*exposure_auto;
312 		struct v4l2_ctrl	*exposure;
313 		int			exposure_valid;
314 		unsigned long		last_exposure_update; /* In jiffies */
315 		s32			last_exposure;
316 	};
317 	struct v4l2_ctrl		*colorfx;
318 	struct {
319 		/* autocontour/contour cluster */
320 		struct v4l2_ctrl	*autocontour;
321 		struct v4l2_ctrl	*contour;
322 	};
323 	struct v4l2_ctrl		*backlight;
324 	struct v4l2_ctrl		*flicker;
325 	struct v4l2_ctrl		*noise_reduction;
326 	struct v4l2_ctrl		*save_user;
327 	struct v4l2_ctrl		*restore_user;
328 	struct v4l2_ctrl		*restore_factory;
329 	struct v4l2_ctrl		*awb_speed;
330 	struct v4l2_ctrl		*awb_delay;
331 	struct {
332 		/* motor control cluster */
333 		struct v4l2_ctrl	*motor_pan;
334 		struct v4l2_ctrl	*motor_tilt;
335 		struct v4l2_ctrl	*motor_pan_reset;
336 		struct v4l2_ctrl	*motor_tilt_reset;
337 	};
338 	/* CODEC3 models have both gain and exposure controlled by autogain */
339 	struct v4l2_ctrl		*autogain_expo_cluster[3];
340 };
341 
342 /* Global variables */
343 #ifdef CONFIG_USB_PWC_DEBUG
344 extern int pwc_trace;
345 #endif
346 
347 /** Functions in pwc-misc.c */
348 /* sizes in pixels */
349 extern const int pwc_image_sizes[PSZ_MAX][2];
350 
351 int pwc_get_size(struct pwc_device *pdev, int width, int height);
352 void pwc_construct(struct pwc_device *pdev);
353 
354 /** Functions in pwc-ctrl.c */
355 /* Request a certain video mode. Returns < 0 if not possible */
356 extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
357 	int pixfmt, int frames, int *compression, int send_to_cam);
358 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
359 extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
360 extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
361 extern int send_control_msg(struct pwc_device *pdev,
362 			    u8 request, u16 value, void *buf, int buflen);
363 
364 /* Control get / set helpers */
365 int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data);
366 int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data);
367 int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data);
368 #define pwc_set_s8_ctrl pwc_set_u8_ctrl
369 int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *dat);
370 int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data);
371 int pwc_button_ctrl(struct pwc_device *pdev, u16 value);
372 int pwc_init_controls(struct pwc_device *pdev);
373 
374 /* Power down or up the camera; not supported by all models */
375 extern void pwc_camera_power(struct pwc_device *pdev, int power);
376 
377 extern const struct v4l2_ioctl_ops pwc_ioctl_ops;
378 
379 /** pwc-uncompress.c */
380 /* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
381 int pwc_decompress(struct pwc_device *pdev, struct pwc_frame_buf *fbuf);
382 
383 #endif
384