/******************************************************************************************** * drivers/input/stmpe11.h * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * References: * "STMPE811 S-Touch® advanced resistive touchscreen controller with 8-bit * GPIO expander," Doc ID 14489 Rev 6, CD00186725, STMicroelectronics" * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ********************************************************************************************/ #ifndef __DRIVERS_INPUT_STMPE11_H #define __DRIVERS_INPUT_STMPE11_H /******************************************************************************************** * Included Files ********************************************************************************************/ #include #include #include #include #if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11) /******************************************************************************************** * Pre-Processor Definitions ********************************************************************************************/ /* Configuration ****************************************************************************/ /* Reference counting is partially implemented, but not needed in the current design. */ #undef CONFIG_STMPE11_REFCNT /* No support for the SPI interface yet */ #ifdef CONFIG_STMPE11_SPI # error "Only the STMPE11 I2C interface is supported by this driver" #endif /* Driver support ***************************************************************************/ /* This format is used to construct the /dev/input[n] device driver path. It defined here * so that it will be used consistently in all places. */ #define DEV_FORMAT "/dev/input%d" #define DEV_NAMELEN 16 /******************************************************************************************** * Public Types ********************************************************************************************/ /* This describes the state of one contact */ enum stmpe11_contact_3 { CONTACT_NONE = 0, /* No contact */ CONTACT_DOWN, /* First contact */ CONTACT_MOVE, /* Same contact, possibly different position */ CONTACT_UP, /* Contact lost */ }; /* This structure describes the results of one STMPE11 sample */ struct stmpe11_sample_s { uint8_t id; /* Sampled touch point ID */ uint8_t contact; /* Contact state (see enum stmpe11_contact_e) */ uint16_t x; /* Measured X position */ uint16_t y; /* Measured Y position */ uint16_t z; /* Measured Z position */ }; /* This structure represents the state of the SMTPE11 driver */ struct stmpe11_dev_s { #ifdef CONFIG_STMPE11_MULTIPLE FAR struct stmpe11_dev_s *flink; /* Supports a singly linked list of drivers */ #endif #ifdef CONFIG_STMPE11_REFCNT uint8_t crefs; /* Number of times the device has been opened */ #endif uint8_t nwaiters; /* Number of threads waiting for STMPE11 data */ uint8_t inuse; /* SMTPE11 pins in use */ uint8_t id; /* Current touch point ID (TSC only) */ uint8_t minor; /* Touchscreen minor device number (TSC only) */ volatile bool penchange; /* An unreported event is buffered (TSC only) */ sem_t devsem; /* Manages exclusive access to this structure */ sem_t waitsem; /* Used to wait for the availability of data */ uint32_t threshx; /* Thresholded X value (TSC only) */ uint32_t threshy; /* Thresholded Y value (TSC only) */ #ifdef CONFIG_STMPE11_SPI FAR struct spi_dev_s *spi; /* Saved SPI driver instance */ #else FAR struct i2c_dev_s *i2c; /* Saved I2C driver instance */ #endif FAR struct stmpe11_config_s *config; /* Board configuration data (TSC only) */ struct work_s work; /* Supports the interrupt handling "bottom half" */ struct stmpe11_sample_s sample; /* Last sampled touch point data (TSC only) */ /* The following is a list if poll structures of threads waiting for * driver events. The 'struct pollfd' reference for each open is also * retained in the f_priv field of the 'struct file'. */ #ifndef CONFIG_DISABLE_POLL struct pollfd *fds[CONFIG_STMPE11_NPOLLWAITERS]; #endif }; /******************************************************************************************** * Public Function Prototypes ********************************************************************************************/ /******************************************************************************************** * Name: stmpe11_getreg8 * * Description: * Read from an 8-bit STMPE11 register * ********************************************************************************************/ static uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr); /******************************************************************************************** * Name: stmpe11_putreg8 * * Description: * Write a value to an 8-bit STMPE11 register * ********************************************************************************************/ void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr, uint8_t regval); /******************************************************************************************** * Name: stmpe11_getreg16 * * Description: * Read 16-bits of data from an STMPE-11 register * ********************************************************************************************/ uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr); #endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 */ #endif /* __DRIVERS_INPUT_STMPE11_H */