Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * drivers/usb/input/yealink.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #ifndef INPUT_YEALINK_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define INPUT_YEALINK_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) /* Using the control channel on interface 3 various aspects of the phone
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * can be controlled like LCD, LED, dialtone and the ringtone.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) struct yld_ctl_packet {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	u8	cmd;		/* command code, see below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	u8	size;		/* 1-11, size of used data bytes. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	__be16	offset;		/* internal packet offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	u8	data[11];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	s8	sum;		/* negative sum of 15 preceding bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define USB_PKT_LEN	sizeof(struct yld_ctl_packet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /* The following yld_ctl_packet's are available: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) /* Init registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * cmd		0x8e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * size		10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * data		0,0,0,0....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define CMD_INIT		0x8e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) /* Request key scan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  * cmd		0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * data[0]	on return returns the key number, if it changes there's a new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * 		key pressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define CMD_KEYPRESS		0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* Request scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * cmd		0x81
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  * offset	key number [0-1f]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  * data[0]	on return returns the scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define CMD_SCANCODE		0x81
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) /* Set LCD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * cmd		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * size		1-11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  * offset	0-23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * data		segment bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define CMD_LCD			0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) /* Set led
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * cmd		0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * data[0]	0 OFF / 1 ON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #define CMD_LED			0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) /* Set ringtone volume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * cmd		0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * data[0]	0-0xff  volume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define CMD_RING_VOLUME		0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) /* Set ringtone notes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * cmd		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * size		1-11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * offset	0->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * data		binary representation LE16(-freq), LE16(duration) ....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #define CMD_RING_NOTE		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) /* Sound ringtone via the speaker on the back
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * cmd		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  * data[0]	0 OFF / 0x24 ON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) #define CMD_RINGTONE		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) /* Sound dial tone via the ear speaker
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  * cmd		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * size		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  * offset	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * data[0]	0 OFF / 1 ON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define CMD_DIALTONE		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #endif /* INPUT_YEALINK_H */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #if defined(_SEG) && defined(_PIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* This table maps the LCD segments onto individual bit positions in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * yld_status struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* LCD, each segment must be driven separately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  * Layout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  *   |[]   [][]   [][]   [][]   in   |[][]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  *   |[] M [][] D [][] : [][]   out  |[][]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  *                             store
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  *    NEW REP         SU MO TU WE TH FR SA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  *    [] [] [] [] [] [] [] [] [] [] [] []
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  *    [] [] [] [] [] [] [] [] [] [] [] []
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* Line 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  *	Format		: 18.e8.M8.88...188
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  *	Icon names	: M D : IN OUT STORE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define LCD_LINE1_OFFSET	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define LCD_LINE1_SIZE		17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* Note: first g then f =>			       !      !      */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* _SEG(    type    a      b      c      d      e      g      f   )  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	_SEG('1',  0,0 , 22,2 , 22,2 ,  0,0 ,  0,0 ,  0,0 ,  0,0	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	_SEG('8', 20,1 , 20,2 , 20,4 , 20,8 , 21,4 , 21,2 , 21,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	_PIC('.', 22,1 , "M"						),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	_SEG('e', 18,1 , 18,2 , 18,4 , 18,1 , 19,2 , 18,1 , 19,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	_SEG('8', 16,1 , 16,2 , 16,4 , 16,8 , 17,4 , 17,2 , 17,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	_PIC('.', 15,8 , "D"						),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	_SEG('M', 14,1 , 14,2 , 14,4 , 14,1 , 15,4 , 15,2 , 15,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	_SEG('8', 12,1 , 12,2 , 12,4 , 12,8 , 13,4 , 13,2 , 13,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	_PIC('.', 11,8 , ":"						),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	_SEG('8', 10,1 , 10,2 , 10,4 , 10,8 , 11,4 , 11,2 , 11,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	_SEG('8',  8,1 ,  8,2 ,  8,4 ,  8,8 ,  9,4 ,  9,2 ,  9,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	_PIC('.',  7,1 , "IN"						),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	_PIC('.',  7,2 , "OUT"						),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	_PIC('.',  7,4 , "STORE"					),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	_SEG('1',  0,0 ,  5,1 ,  5,1 ,  0,0 ,  0,0 ,  0,0 ,  0,0	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	_SEG('8',  4,1 ,  4,2 ,  4,4 ,  4,8 ,  5,8 ,  5,4 ,  5,2	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	_SEG('8',  2,1 ,  2,2 ,  2,4 ,  2,8 ,  3,4 ,  3,2 ,  3,1	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Line 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  *	Format		: .........
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  *	Pict. name	: NEW REP SU MO TU WE TH FR SA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define LCD_LINE2_OFFSET	LCD_LINE1_OFFSET + LCD_LINE1_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define LCD_LINE2_SIZE		9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	_PIC('.', 23,2 , "NEW"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	_PIC('.', 23,4 , "REP"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	_PIC('.',  1,8 , "SU"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	_PIC('.',  1,4 , "MO"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	_PIC('.',  1,2 , "TU"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	_PIC('.',  1,1 , "WE"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	_PIC('.',  0,1 , "TH"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	_PIC('.',  0,2 , "FR"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	_PIC('.',  0,4 , "SA"	),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Line 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)  *	Format		: 888888888888
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #define LCD_LINE3_OFFSET	LCD_LINE2_OFFSET + LCD_LINE2_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #define LCD_LINE3_SIZE		12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	_SEG('8', 22,16, 22,32, 22,64, 22,128, 23,128, 23,64, 23,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	_SEG('8', 20,16, 20,32, 20,64, 20,128, 21,128, 21,64, 21,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	_SEG('8', 18,16, 18,32, 18,64, 18,128, 19,128, 19,64, 19,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	_SEG('8', 16,16, 16,32, 16,64, 16,128, 17,128, 17,64, 17,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	_SEG('8', 14,16, 14,32, 14,64, 14,128, 15,128, 15,64, 15,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	_SEG('8', 12,16, 12,32, 12,64, 12,128, 13,128, 13,64, 13,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	_SEG('8', 10,16, 10,32, 10,64, 10,128, 11,128, 11,64, 11,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	_SEG('8',  8,16,  8,32,  8,64,  8,128,  9,128,  9,64,  9,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	_SEG('8',  6,16,  6,32,  6,64,  6,128,  7,128,  7,64,  7,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	_SEG('8',  4,16,  4,32,  4,64,  4,128,  5,128,  5,64,  5,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	_SEG('8',  2,16,  2,32,  2,64,  2,128,  3,128,  3,64,  3,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	_SEG('8',  0,16,  0,32,  0,64,  0,128,  1,128,  1,64,  1,32  ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Line 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)  * The LED, DIALTONE and RINGTONE are implemented as icons and use the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)  * sysfs interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #define LCD_LINE4_OFFSET	LCD_LINE3_OFFSET + LCD_LINE3_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	_PIC('.', offsetof(struct yld_status, led)	, 0x01, "LED" ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	_PIC('.', offsetof(struct yld_status, dialtone) , 0x01, "DIALTONE" ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	_PIC('.', offsetof(struct yld_status, ringtone) , 0x24, "RINGTONE" ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) #undef _SEG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #undef _PIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #endif /* _SEG && _PIC */