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Edit File: isdv4.h

/* * Copyright 2010 by Red Hat, Inc. * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef ISDV4_H #define ISDV4_H #include <stdint.h> #include <stddef.h> #include <string.h> #define ISDV4_QUERY "*" /* ISDV4 query command */ #define ISDV4_RESET "&" /* ISDV4 touch panel reset command */ #define ISDV4_TOUCH_QUERY "%" /* ISDV4 touch query command */ #define ISDV4_STOP "0" /* ISDV4 stop command */ #define ISDV4_SAMPLING "1" /* ISDV4 sampling command */ /* packet length for individual models */ #define ISDV4_PKGLEN_TOUCH93 5 #define ISDV4_PKGLEN_TOUCH9A 7 #define ISDV4_PKGLEN_TPCPEN 9 #define ISDV4_PKGLEN_TPCCTL 11 #define ISDV4_PKGLEN_TOUCH2FG 13 #define HEADER_BIT 0x80 #define CONTROL_BIT 0x40 #define DATA_ID_MASK 0x3F #define TOUCH_CONTROL_BIT 0x10 /* Only for touch devices: use serial ID as index to get packet length for device */ int ISDV4PacketLengths[] = { /* 0x00 => */ ISDV4_PKGLEN_TOUCH93, /* 0x01 => */ ISDV4_PKGLEN_TOUCH9A, /* 0x02 => */ ISDV4_PKGLEN_TOUCH93, /* 0x03 => */ ISDV4_PKGLEN_TOUCH9A, /* 0x04 => */ ISDV4_PKGLEN_TOUCH9A, /* 0x05 => */ ISDV4_PKGLEN_TOUCH2FG }; /* ISDV4 protocol parsing structs. */ /* Query reply data */ typedef struct { unsigned char data_id; /* always 00H */ uint16_t x_max; uint16_t y_max; uint16_t pressure_max; uint8_t tilt_x_max; uint8_t tilt_y_max; uint16_t version; } ISDV4QueryReply; /* Touch Query reply data */ typedef struct { uint8_t data_id; /* always 01H */ uint8_t panel_resolution; uint8_t sensor_id; uint16_t x_max; uint16_t y_max; uint8_t capacity_resolution; uint16_t version; } ISDV4TouchQueryReply; /* Touch Data format. Note that capacity and finger2 are only set for some * devices (0 on all others) */ typedef struct { uint8_t status; /* touch down/up */ uint16_t x; uint16_t y; uint16_t capacity; struct { uint8_t status; /* touch down/up */ uint16_t x; uint16_t y; } finger2; } ISDV4TouchData; /* Coordinate data format */ typedef struct { uint8_t proximity; /* in proximity? */ uint8_t tip; /* tip/eraser pressed? */ uint8_t side; /* side switch pressed? */ uint8_t eraser; /* eraser pressed? */ uint16_t x; uint16_t y; uint16_t pressure; uint8_t tilt_x; uint8_t tilt_y; } ISDV4CoordinateData; static inline int isdv4ParseQuery(const unsigned char *buffer, const size_t len, ISDV4QueryReply *reply) { int header, control; if (!reply || len < ISDV4_PKGLEN_TPCCTL) return 0; header = !!(buffer[0] & HEADER_BIT); control = !!(buffer[0] & CONTROL_BIT); if (!header || !control) return -1; reply->data_id = buffer[0] & DATA_ID_MASK; /* FIXME: big endian? */ reply->x_max = (buffer[1] << 9) | (buffer[2] << 2) | ((buffer[6] >> 5) & 0x3); reply->y_max = (buffer[3] << 9) | (buffer[4] << 2) | ((buffer[6] >> 3) & 0x3); reply->pressure_max = (buffer[6] & 0x7) << 7 | buffer[5]; reply->tilt_y_max = buffer[7]; reply->tilt_x_max = buffer[8]; reply->version = buffer[9] << 7 | buffer[10]; return ISDV4_PKGLEN_TPCCTL; } static inline int isdv4ParseTouchQuery(const unsigned char *buffer, const size_t len, ISDV4TouchQueryReply *reply) { int header, control; if (!reply || len < ISDV4_PKGLEN_TPCCTL) return 0; header = !!(buffer[0] & HEADER_BIT); control = !!(buffer[0] & CONTROL_BIT); if (!header || !control) return -1; reply->data_id = buffer[0] & DATA_ID_MASK; reply->sensor_id = buffer[2] & 0x7; reply->panel_resolution = buffer[1]; /* FIXME: big endian? */ reply->x_max = (buffer[3] << 9) | (buffer[4] << 2) | ((buffer[2] >> 5) & 0x3); reply->y_max = (buffer[5] << 9) | (buffer[6] << 2) | ((buffer[2] >> 3) & 0x3); reply->capacity_resolution = buffer[7]; reply->version = buffer[9] << 7 | buffer[10]; return ISDV4_PKGLEN_TPCCTL; } /* pktlen defines what touch type we parse */ static inline int isdv4ParseTouchData(const unsigned char *buffer, const size_t buff_len, const size_t pktlen, ISDV4TouchData *touchdata) { int header, touch; if (!touchdata || buff_len < pktlen) return 0; header = !!(buffer[0] & HEADER_BIT); touch = !!(buffer[0] & TOUCH_CONTROL_BIT); if (header != 1 || touch != 1) return -1; memset(touchdata, 0, sizeof(*touchdata)); touchdata->status = buffer[0] & 0x1; /* FIXME: big endian */ touchdata->x = buffer[1] << 7 | buffer[2]; touchdata->y = buffer[3] << 7 | buffer[4]; if (pktlen == ISDV4_PKGLEN_TOUCH9A) touchdata->capacity = buffer[5] << 7 | buffer[6]; if (pktlen == ISDV4_PKGLEN_TOUCH2FG) { touchdata->finger2.x = buffer[7] << 7 | buffer[8]; touchdata->finger2.y = buffer[9] << 7 | buffer[10]; touchdata->finger2.status = !!(buffer[0] & 0x2); /* FIXME: is there a fg2 capacity? */ } return pktlen; } static inline int isdv4ParseCoordinateData(const unsigned char *buffer, const size_t len, ISDV4CoordinateData *coord) { int header, control; if (!coord || len < ISDV4_PKGLEN_TPCPEN) return 0; header = !!(buffer[0] & HEADER_BIT); control = !!(buffer[0] & TOUCH_CONTROL_BIT); if (header != 1 || control != 0) return -1; coord->proximity = (buffer[0] >> 5) & 0x1; coord->tip = buffer[0] & 0x1; coord->side = (buffer[0] >> 1) & 0x1; coord->eraser = (buffer[0] >> 2) & 0x1; /* FIXME: big endian */ coord->x = (buffer[1] << 9) | (buffer[2] << 2) | ((buffer[6] >> 5) & 0x3); coord->y = (buffer[3] << 9) | (buffer[4] << 2) | ((buffer[6] >> 3) & 0x3); coord->pressure = ((buffer[6] & 0x7) << 7) | buffer[5]; coord->tilt_x = buffer[7]; coord->tilt_y = buffer[8]; return ISDV4_PKGLEN_TPCPEN; } #endif /* ISDV4_H */ /* vim: set noexpandtab tabstop=8 shiftwidth=8: */