| Copyright (C) 2002-2010 Sentelic Corporation. | 
 | Last update: Jan-13-2010 | 
 |  | 
 | ============================================================================== | 
 | * Finger Sensing Pad Intellimouse Mode(scrolling wheel, 4th and 5th buttons) | 
 | ============================================================================== | 
 | A) MSID 4: Scrolling wheel mode plus Forward page(4th button) and Backward | 
 |    page (5th button) | 
 | @1. Set sample rate to 200; | 
 | @2. Set sample rate to 200; | 
 | @3. Set sample rate to 80; | 
 | @4. Issuing the "Get device ID" command (0xF2) and waits for the response; | 
 | @5. FSP will respond 0x04. | 
 |  | 
 | Packet 1 | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |Y|X|y|x|1|M|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 | | |B|F|W|W|W|W| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7 => Y overflow | 
 |         Bit6 => X overflow | 
 |         Bit5 => Y sign bit | 
 |         Bit4 => X sign bit | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: X Movement(9-bit 2's complement integers) | 
 | Byte 3: Y Movement(9-bit 2's complement integers) | 
 | Byte 4: Bit3~Bit0 => the scrolling wheel's movement since the last data report. | 
 |                      valid values, -8 ~ +7 | 
 |         Bit4 => 1 = 4th mouse button is pressed, Forward one page. | 
 |                 0 = 4th mouse button is not pressed. | 
 |         Bit5 => 1 = 5th mouse button is pressed, Backward one page. | 
 |                 0 = 5th mouse button is not pressed. | 
 |  | 
 | B) MSID 6: Horizontal and Vertical scrolling. | 
 | @ Set bit 1 in register 0x40 to 1 | 
 |  | 
 | # FSP replaces scrolling wheel's movement as 4 bits to show horizontal and | 
 |   vertical scrolling. | 
 |  | 
 | Packet 1 | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |Y|X|y|x|1|M|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 | | |B|F|r|l|u|d| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7 => Y overflow | 
 |         Bit6 => X overflow | 
 |         Bit5 => Y sign bit | 
 |         Bit4 => X sign bit | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: X Movement(9-bit 2's complement integers) | 
 | Byte 3: Y Movement(9-bit 2's complement integers) | 
 | Byte 4: Bit0 => the Vertical scrolling movement downward. | 
 | 	Bit1 => the Vertical scrolling movement upward. | 
 | 	Bit2 => the Horizontal scrolling movement leftward. | 
 | 	Bit3 => the Horizontal scrolling movement rightward. | 
 |         Bit4 => 1 = 4th mouse button is pressed, Forward one page. | 
 |                 0 = 4th mouse button is not pressed. | 
 |         Bit5 => 1 = 5th mouse button is pressed, Backward one page. | 
 |                 0 = 5th mouse button is not pressed. | 
 |  | 
 | C) MSID 7: | 
 | # FSP uses 2 packets (8 Bytes) to represent Absolute Position. | 
 |   so we have PACKET NUMBER to identify packets. | 
 |   If PACKET NUMBER is 0, the packet is Packet 1. | 
 |   If PACKET NUMBER is 1, the packet is Packet 2. | 
 |   Please count this number in program. | 
 |  | 
 | # MSID6 special packet will be enable at the same time when enable MSID 7. | 
 |  | 
 | ============================================================================== | 
 | * Absolute position for STL3886-G0. | 
 | ============================================================================== | 
 | @ Set bit 2 or 3 in register 0x40 to 1 | 
 | @ Set bit 6 in register 0x40 to 1 | 
 |  | 
 | Packet 1 (ABSOLUTE POSITION) | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |0|1|V|1|1|M|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |r|l|d|u|X|X|Y|Y| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordination packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => valid bit | 
 |         Bit4 => 1 | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: X coordinate (xpos[9:2]) | 
 | Byte 3: Y coordinate (ypos[9:2]) | 
 | Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0]) | 
 |         Bit3~Bit2 => X coordinate (ypos[1:0]) | 
 |         Bit4 => scroll up | 
 |         Bit5 => scroll down | 
 |         Bit6 => scroll left | 
 |         Bit7 => scroll right | 
 |  | 
 | Notify Packet for G0 | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |1|0|0|1|1|M|R|L|  2  |C|C|C|C|C|C|C|C|  3 |M|M|M|M|M|M|M|M|  4 |0|0|0|0|0|0|0|0| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordination packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => 0 | 
 |         Bit4 => 1 | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: Message Type => 0x5A (Enable/Disable status packet) | 
 |         Mode Type => 0xA5 (Normal/Icon mode status) | 
 | Byte 3: Message Type => 0x00 (Disabled) | 
 |                      => 0x01 (Enabled) | 
 |         Mode Type    => 0x00 (Normal) | 
 |                      => 0x01 (Icon) | 
 | Byte 4: Bit7~Bit0 => Don't Care | 
 |  | 
 | ============================================================================== | 
 | * Absolute position for STL3888-Ax. | 
 | ============================================================================== | 
 | Packet 1 (ABSOLUTE POSITION) | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |0|1|V|A|1|L|0|1|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |x|x|y|y|X|X|Y|Y| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordination packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up. | 
 |                 When both fingers are up, the last two reports have zero valid | 
 |                 bit. | 
 |         Bit4 => arc | 
 |         Bit3 => 1 | 
 |         Bit2 => Left Button, 1 is pressed, 0 is released. | 
 |         Bit1 => 0 | 
 |         Bit0 => 1 | 
 | Byte 2: X coordinate (xpos[9:2]) | 
 | Byte 3: Y coordinate (ypos[9:2]) | 
 | Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0]) | 
 |         Bit3~Bit2 => X coordinate (ypos[1:0]) | 
 |         Bit5~Bit4 => y1_g | 
 |         Bit7~Bit6 => x1_g | 
 |  | 
 | Packet 2 (ABSOLUTE POSITION) | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |0|1|V|A|1|R|1|0|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |x|x|y|y|X|X|Y|Y| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordinates packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up. | 
 |                 When both fingers are up, the last two reports have zero valid | 
 |                 bit. | 
 |         Bit4 => arc | 
 |         Bit3 => 1 | 
 |         Bit2 => Right Button, 1 is pressed, 0 is released. | 
 |         Bit1 => 1 | 
 |         Bit0 => 0 | 
 | Byte 2: X coordinate (xpos[9:2]) | 
 | Byte 3: Y coordinate (ypos[9:2]) | 
 | Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0]) | 
 |         Bit3~Bit2 => X coordinate (ypos[1:0]) | 
 |         Bit5~Bit4 => y2_g | 
 |         Bit7~Bit6 => x2_g | 
 |  | 
 | Notify Packet for STL3888-Ax | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |1|0|1|P|1|M|R|L|  2  |C|C|C|C|C|C|C|C|  3 |0|0|F|F|0|0|0|i|  4 |r|l|d|u|0|0|0|0| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordinates packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => 1 | 
 |         Bit4 => when in absolute coordinates mode (valid when EN_PKT_GO is 1): | 
 |                 0: left button is generated by the on-pad command | 
 |                 1: left button is generated by the external button | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: Message Type => 0xB7 (Multi Finger, Multi Coordinate mode) | 
 | Byte 3: Bit7~Bit6 => Don't care | 
 |         Bit5~Bit4 => Number of fingers | 
 |         Bit3~Bit1 => Reserved | 
 |         Bit0 => 1: enter gesture mode; 0: leaving gesture mode | 
 | Byte 4: Bit7 => scroll right button | 
 |         Bit6 => scroll left button | 
 |         Bit5 => scroll down button | 
 |         Bit4 => scroll up button | 
 |             * Note that if gesture and additional buttoni (Bit4~Bit7) | 
 |               happen at the same time, the button information will not | 
 |               be sent. | 
 |         Bit3~Bit0 => Reserved | 
 |  | 
 | Sample sequence of Multi-finger, Multi-coordinate mode: | 
 |  | 
 | 	notify packet (valid bit == 1), abs pkt 1, abs pkt 2, abs pkt 1, | 
 | 	abs pkt 2, ..., notify packet (valid bit == 0) | 
 |  | 
 | ============================================================================== | 
 | * Absolute position for STL3888-B0. | 
 | ============================================================================== | 
 | Packet 1(ABSOLUTE POSITION) | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |0|1|V|F|1|0|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |r|l|u|d|X|X|Y|Y| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordinates packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up. | 
 |                 When both fingers are up, the last two reports have zero valid | 
 |                 bit. | 
 |         Bit4 => finger up/down information. 1: finger down, 0: finger up. | 
 |         Bit3 => 1 | 
 |         Bit2 => finger index, 0 is the first finger, 1 is the second finger. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: X coordinate (xpos[9:2]) | 
 | Byte 3: Y coordinate (ypos[9:2]) | 
 | Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0]) | 
 |         Bit3~Bit2 => X coordinate (ypos[1:0]) | 
 |         Bit4 => scroll down button | 
 |         Bit5 => scroll up button | 
 |         Bit6 => scroll left button | 
 |         Bit7 => scroll right button | 
 |  | 
 | Packet 2 (ABSOLUTE POSITION) | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |0|1|V|F|1|1|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |r|l|u|d|X|X|Y|Y| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordination packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up. | 
 |                 When both fingers are up, the last two reports have zero valid | 
 |                 bit. | 
 |         Bit4 => finger up/down information. 1: finger down, 0: finger up. | 
 |         Bit3 => 1 | 
 |         Bit2 => finger index, 0 is the first finger, 1 is the second finger. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: X coordinate (xpos[9:2]) | 
 | Byte 3: Y coordinate (ypos[9:2]) | 
 | Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0]) | 
 |         Bit3~Bit2 => X coordinate (ypos[1:0]) | 
 |         Bit4 => scroll down button | 
 |         Bit5 => scroll up button | 
 |         Bit6 => scroll left button | 
 |         Bit7 => scroll right button | 
 |  | 
 | Notify Packet for STL3888-B0 | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |1|0|1|P|1|M|R|L|  2  |C|C|C|C|C|C|C|C|  3 |0|0|F|F|0|0|0|i|  4 |r|l|u|d|0|0|0|0| | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | Byte 1: Bit7~Bit6 => 00, Normal data packet | 
 |                   => 01, Absolute coordination packet | 
 |                   => 10, Notify packet | 
 |         Bit5 => 1 | 
 |         Bit4 => when in absolute coordinate mode (valid when EN_PKT_GO is 1): | 
 |                 0: left button is generated by the on-pad command | 
 |                 1: left button is generated by the external button | 
 |         Bit3 => 1 | 
 |         Bit2 => Middle Button, 1 is pressed, 0 is not pressed. | 
 |         Bit1 => Right Button, 1 is pressed, 0 is not pressed. | 
 |         Bit0 => Left Button, 1 is pressed, 0 is not pressed. | 
 | Byte 2: Message Type => 0xB7 (Multi Finger, Multi Coordinate mode) | 
 | Byte 3: Bit7~Bit6 => Don't care | 
 |         Bit5~Bit4 => Number of fingers | 
 |         Bit3~Bit1 => Reserved | 
 |         Bit0 => 1: enter gesture mode; 0: leaving gesture mode | 
 | Byte 4: Bit7 => scroll right button | 
 |         Bit6 => scroll left button | 
 |         Bit5 => scroll up button | 
 |         Bit4 => scroll down button | 
 |             * Note that if gesture and additional button(Bit4~Bit7) | 
 |               happen at the same time, the button information will not | 
 |               be sent. | 
 |         Bit3~Bit0 => Reserved | 
 |  | 
 | Sample sequence of Multi-finger, Multi-coordinate mode: | 
 |  | 
 | 	notify packet (valid bit == 1), abs pkt 1, abs pkt 2, abs pkt 1, | 
 | 	abs pkt 2, ..., notify packet (valid bit == 0) | 
 |  | 
 | ============================================================================== | 
 | * FSP Enable/Disable packet | 
 | ============================================================================== | 
 |    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0 | 
 | BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------| | 
 |   1   |Y|X|0|0|1|M|R|L|  2  |0|1|0|1|1|0|1|E|  3 | | | | | | | | |  4 | | | | | | | | | | 
 |       |---------------|     |---------------|    |---------------|    |---------------| | 
 |  | 
 | FSP will send out enable/disable packet when FSP receive PS/2 enable/disable | 
 | command. Host will receive the packet which Middle, Right, Left button will | 
 | be set. The packet only use byte 0 and byte 1 as a pattern of original packet. | 
 | Ignore the other bytes of the packet. | 
 |  | 
 | Byte 1: Bit7 => 0, Y overflow | 
 |         Bit6 => 0, X overflow | 
 | 	Bit5 => 0, Y sign bit | 
 |         Bit4 => 0, X sign bit | 
 | 	Bit3 => 1 | 
 | 	Bit2 => 1, Middle Button | 
 |         Bit1 => 1, Right Button | 
 |         Bit0 => 1, Left Button | 
 | Byte 2: Bit7~1 => (0101101b) | 
 |         Bit0 => 1 = Enable | 
 | 		0 = Disable | 
 | Byte 3: Don't care | 
 | Byte 4: Don't care (MOUSE ID 3, 4) | 
 | Byte 5~8: Don't care (Absolute packet) | 
 |  | 
 | ============================================================================== | 
 | * PS/2 Command Set | 
 | ============================================================================== | 
 |  | 
 | FSP supports basic PS/2 commanding set and modes, refer to following URL for | 
 | details about PS/2 commands: | 
 |  | 
 | http://www.computer-engineering.org/ps2mouse/ | 
 |  | 
 | ============================================================================== | 
 | * Programming Sequence for Determining Packet Parsing Flow | 
 | ============================================================================== | 
 | 1. Identify FSP by reading device ID(0x00) and version(0x01) register | 
 |  | 
 | 2. Determine number of buttons by reading status2 (0x0b) register | 
 |  | 
 | 	buttons = reg[0x0b] & 0x30 | 
 |  | 
 | 	if buttons == 0x30 or buttons == 0x20: | 
 | 		# two/four buttons | 
 | 		Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse' | 
 | 		section A for packet parsing detail(ignore byte 4, bit ~ 7) | 
 | 	elif buttons == 0x10: | 
 | 		# 6 buttons | 
 | 		Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse' | 
 | 		section B for packet parsing detail | 
 | 	elif buttons == 0x00: | 
 | 		# 6 buttons | 
 | 		Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse' | 
 | 		section A for packet parsing detail | 
 |  | 
 | ============================================================================== | 
 | * Programming Sequence for Register Reading/Writing | 
 | ============================================================================== | 
 |  | 
 | Register inversion requirement: | 
 |  | 
 |   Following values needed to be inverted(the '~' operator in C) before being | 
 | sent to FSP: | 
 |  | 
 | 	0xe9, 0xee, 0xf2 and 0xff. | 
 |  | 
 | Register swapping requirement: | 
 |  | 
 |   Following values needed to have their higher 4 bits and lower 4 bits being | 
 | swapped before being sent to FSP: | 
 |  | 
 | 	10, 20, 40, 60, 80, 100 and 200. | 
 |  | 
 | Register reading sequence: | 
 |  | 
 | 	1. send 0xf3 PS/2 command to FSP; | 
 |  | 
 | 	2. send 0x66 PS/2 command to FSP; | 
 |  | 
 | 	3. send 0x88 PS/2 command to FSP; | 
 |  | 
 | 	4. send 0xf3 PS/2 command to FSP; | 
 |  | 
 | 	5. if the register address being to read is not required to be | 
 | 	inverted(refer to the 'Register inversion requirement' section), | 
 | 	goto step 6 | 
 |  | 
 | 	5a. send 0x68 PS/2 command to FSP; | 
 |  | 
 | 	5b. send the inverted register address to FSP and goto step 8; | 
 |  | 
 | 	6. if the register address being to read is not required to be | 
 | 	swapped(refer to the 'Register swapping requirement' section), | 
 | 	goto step 7 | 
 |  | 
 | 	6a. send 0xcc PS/2 command to FSP; | 
 |  | 
 | 	6b. send the swapped register address to FSP and goto step 8; | 
 |  | 
 | 	7. send 0x66 PS/2 command to FSP; | 
 |  | 
 | 	7a. send the original register address to FSP and goto step 8; | 
 |  | 
 | 	8. send 0xe9(status request) PS/2 command to FSP; | 
 |  | 
 | 	9. the response read from FSP should be the requested register value. | 
 |  | 
 | Register writing sequence: | 
 |  | 
 | 	1. send 0xf3 PS/2 command to FSP; | 
 |  | 
 | 	2. if the register address being to write is not required to be | 
 | 	inverted(refer to the 'Register inversion requirement' section), | 
 | 	goto step 3 | 
 |  | 
 | 	2a. send 0x74 PS/2 command to FSP; | 
 |  | 
 | 	2b. send the inverted register address to FSP and goto step 5; | 
 |  | 
 | 	3. if the register address being to write is not required to be | 
 | 	swapped(refer to the 'Register swapping requirement' section), | 
 | 	goto step 4 | 
 |  | 
 | 	3a. send 0x77 PS/2 command to FSP; | 
 |  | 
 | 	3b. send the swapped register address to FSP and goto step 5; | 
 |  | 
 | 	4. send 0x55 PS/2 command to FSP; | 
 |  | 
 | 	4a. send the register address to FSP and goto step 5; | 
 |  | 
 | 	5. send 0xf3 PS/2 command to FSP; | 
 |  | 
 | 	6. if the register value being to write is not required to be | 
 | 	inverted(refer to the 'Register inversion requirement' section), | 
 | 	goto step 7 | 
 |  | 
 | 	6a. send 0x47 PS/2 command to FSP; | 
 |  | 
 | 	6b. send the inverted register value to FSP and goto step 9; | 
 |  | 
 | 	7. if the register value being to write is not required to be | 
 | 	swapped(refer to the 'Register swapping requirement' section), | 
 | 	goto step 8 | 
 |  | 
 | 	7a. send 0x44 PS/2 command to FSP; | 
 |  | 
 | 	7b. send the swapped register value to FSP and goto step 9; | 
 |  | 
 | 	8. send 0x33 PS/2 command to FSP; | 
 |  | 
 | 	8a. send the register value to FSP; | 
 |  | 
 | 	9. the register writing sequence is completed. | 
 |  | 
 | ============================================================================== | 
 | * Register Listing | 
 | ============================================================================== | 
 |  | 
 | offset	width		default	r/w	name | 
 | 0x00	bit7~bit0	0x01	RO	device ID | 
 |  | 
 | 0x01	bit7~bit0	0xc0	RW	version ID | 
 |  | 
 | 0x02	bit7~bit0	0x01	RO	vendor ID | 
 |  | 
 | 0x03	bit7~bit0	0x01	RO	product ID | 
 |  | 
 | 0x04	bit3~bit0	0x01	RW	revision ID | 
 |  | 
 | 0x0b				RO	test mode status 1 | 
 | 	bit3		1	RO	0: rotate 180 degree, 1: no rotation | 
 |  | 
 | 	bit5~bit4		RO	number of buttons | 
 | 			11 => 2, lbtn/rbtn | 
 | 			10 => 4, lbtn/rbtn/scru/scrd | 
 | 			01 => 6, lbtn/rbtn/scru/scrd/scrl/scrr | 
 | 			00 => 6, lbtn/rbtn/scru/scrd/fbtn/bbtn | 
 |  | 
 | 0x0f				RW	register file page control | 
 | 	bit0		0	RW	1 to enable page 1 register files | 
 |  | 
 | 0x10				RW	system control 1 | 
 | 	bit0		1	RW	Reserved, must be 1 | 
 | 	bit1		0	RW	Reserved, must be 0 | 
 | 	bit4		1	RW	Reserved, must be 0 | 
 | 	bit5		0	RW	register clock gating enable | 
 | 					0: read only, 1: read/write enable | 
 | 	(Note that following registers does not require clock gating being | 
 | 	enabled prior to write: 05 06 07 08 09 0c 0f 10 11 12 16 17 18 23 2e | 
 | 	40 41 42 43.  In addition to that, this bit must be 1 when gesture | 
 | 	mode is enabled) | 
 |  | 
 | 0x31				RW	on-pad command detection | 
 | 	bit7		0	RW	on-pad command left button down tag | 
 | 					enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 0x34				RW	on-pad command control 5 | 
 | 	bit4~bit0	0x05	RW	XLO in 0s/4/1, so 03h = 0010.1b = 2.5 | 
 | 	(Note that position unit is in 0.5 scanline) | 
 |  | 
 | 	bit7		0	RW	on-pad tap zone enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 0x35				RW	on-pad command control 6 | 
 | 	bit4~bit0	0x1d	RW	XHI in 0s/4/1, so 19h = 1100.1b = 12.5 | 
 | 	(Note that position unit is in 0.5 scanline) | 
 |  | 
 | 0x36				RW	on-pad command control 7 | 
 | 	bit4~bit0	0x04	RW	YLO in 0s/4/1, so 03h = 0010.1b = 2.5 | 
 | 	(Note that position unit is in 0.5 scanline) | 
 |  | 
 | 0x37				RW	on-pad command control 8 | 
 | 	bit4~bit0	0x13	RW	YHI in 0s/4/1, so 11h = 1000.1b = 8.5 | 
 | 	(Note that position unit is in 0.5 scanline) | 
 |  | 
 | 0x40				RW	system control 5 | 
 | 	bit1		0	RW	FSP Intellimouse mode enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 	bit2		0	RW	movement + abs. coordinate mode enable | 
 | 					0: disable, 1: enable | 
 | 	(Note that this function has the functionality of bit 1 even when | 
 | 	bit 1 is not set. However, the format is different from that of bit 1. | 
 | 	In addition, when bit 1 and bit 2 are set at the same time, bit 2 will | 
 | 	override bit 1.) | 
 |  | 
 | 	bit3		0	RW	abs. coordinate only mode enable | 
 | 					0: disable, 1: enable | 
 | 	(Note that this function has the functionality of bit 1 even when | 
 | 	bit 1 is not set. However, the format is different from that of bit 1. | 
 | 	In addition, when bit 1, bit 2 and bit 3 are set at the same time, | 
 | 	bit 3 will override bit 1 and 2.) | 
 |  | 
 | 	bit5		0	RW	auto switch enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 	bit6		0	RW	G0 abs. + notify packet format enable | 
 | 					0: disable, 1: enable | 
 | 	(Note that the absolute/relative coordinate output still depends on | 
 | 	bit 2 and 3.  That is, if any of those bit is 1, host will receive | 
 | 	absolute coordinates; otherwise, host only receives packets with | 
 | 	relative coordinate.) | 
 |  | 
 | 	bit7		0	RW	EN_PS2_F2: PS/2 gesture mode 2nd | 
 | 					finger packet enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 0x43				RW	on-pad control | 
 | 	bit0		0	RW	on-pad control enable | 
 | 					0: disable, 1: enable | 
 | 	(Note that if this bit is cleared, bit 3/5 will be ineffective) | 
 |  | 
 | 	bit3		0	RW	on-pad fix vertical scrolling enable | 
 | 					0: disable, 1: enable | 
 |  | 
 | 	bit5		0	RW	on-pad fix horizontal scrolling enable | 
 | 					0: disable, 1: enable |