diff options
Diffstat (limited to 'nuttx/drivers/input/stmpe811_base.c')
| -rw-r--r-- | nuttx/drivers/input/stmpe811_base.c | 546 |
1 files changed, 0 insertions, 546 deletions
diff --git a/nuttx/drivers/input/stmpe811_base.c b/nuttx/drivers/input/stmpe811_base.c deleted file mode 100644 index f37c24622..000000000 --- a/nuttx/drivers/input/stmpe811_base.c +++ /dev/null @@ -1,546 +0,0 @@ -/**************************************************************************** - * drivers/input/stmpe811_base.c - * - * Copyright (C) 2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <unistd.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/kmalloc.h> -#include <nuttx/input/stmpe811.h> - -#include "stmpe811.h" - -#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE811) - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/* If only a single STMPE811 device is supported, then the driver state - * structure may as well be pre-allocated. - */ - -#ifndef CONFIG_STMPE811_MULTIPLE -static struct stmpe811_dev_s g_stmpe811; - -/* Otherwise, we will need to maintain allocated driver instances in a list */ - -#else -static struct stmpe811_dev_s *g_stmpe811list; -#endif - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: stmpe811_worker - * - * Description: - * This is the "bottom half" of the STMPE811 interrupt handler - * - ****************************************************************************/ - -static void stmpe811_worker(FAR void *arg) -{ - FAR struct stmpe811_dev_s *priv = (FAR struct stmpe811_dev_s *)arg; - uint8_t regval; - - DEBUGASSERT(priv && priv->config); - - /* Get the global interrupt status */ - - regval = stmpe811_getreg8(priv, STMPE811_INT_STA); - - /* Check for a touchscreen interrupt */ - -#ifndef CONFIG_STMPE811_TSC_DISABLE - if ((regval & (INT_TOUCH_DET|INT_FIFO_TH|INT_FIFO_OFLOW)) != 0) - { - /* Dispatch the touchscreen interrupt if it was brought into the link */ - -#ifdef CONFIG_HAVE_WEAKFUNCTIONS - if (stmpe811_tscworker) -#endif - { - stmpe811_tscworker(priv, regval); - } - - stmpe811_putreg8(priv, STMPE811_INT_STA, (INT_TOUCH_DET|INT_FIFO_TH|INT_FIFO_OFLOW)); - regval &= ~(INT_TOUCH_DET|INT_FIFO_TH|INT_FIFO_OFLOW); - } -#endif - -#if !defined(CONFIG_STMPE811_GPIO_DISABLE) && !defined(CONFIG_STMPE811_GPIOINT_DISABLE) - if ((regval & INT_GPIO) != 0) - { - /* Dispatch the GPIO interrupt if it was brought into the link */ - -#ifdef CONFIG_HAVE_WEAKFUNCTIONS - if (stmpe811_gpioworker) -#endif - { - stmpe811_gpioworker(priv); - } - - stmpe811_putreg8(priv, STMPE811_INT_STA, INT_GPIO); - regval &= ~INT_GPIO; - } -#endif - - /* Clear any other residual, unhandled pending interrupt */ - - if (regval != 0) - { - stmpe811_putreg8(priv, STMPE811_INT_STA, regval); - } - - /* Re-enable the STMPE811 GPIO interrupt */ - - priv->config->enable(priv->config, true); -} - -/**************************************************************************** - * Name: stmpe811_interrupt - * - * Description: - * The STMPE811 interrupt handler - * - ****************************************************************************/ - -static int stmpe811_interrupt(int irq, FAR void *context) -{ - FAR struct stmpe811_dev_s *priv; - FAR struct stmpe811_config_s *config; - int ret; - - /* Which STMPE811 device caused the interrupt? */ - -#ifndef CONFIG_STMPE811_MULTIPLE - priv = &g_stmpe811; -#else - for (priv = g_stmpe811list; - priv && priv->config->irq != irq; - priv = priv->flink); - - ASSERT(priv != NULL); -#endif - - /* Get a pointer the callbacks for convenience (and so the code is not so - * ugly). - */ - - config = priv->config; - DEBUGASSERT(config != NULL); - - /* Disable further interrupts */ - - config->enable(config, false); - - /* Check if interrupt work is already queue. If it is already busy, then - * we already have interrupt processing in the pipeline and we need to do - * nothing more. - */ - - if (work_available(&priv->work)) - { - /* Yes.. Transfer processing to the worker thread. Since STMPE811 - * interrupts are disabled while the work is pending, no special - * action should be required to protect the work queue. - */ - - ret = work_queue(HPWORK, &priv->work, stmpe811_worker, priv, 0); - if (ret != 0) - { - illdbg("Failed to queue work: %d\n", ret); - } - } - - /* Clear any pending interrupts and return success */ - - config->clear(config); - return OK; -} - -/**************************************************************************** - * Name: stmpe811_checkid - * - * Description: - * Read and verify the STMPE811 chip ID - * - ****************************************************************************/ - -static int stmpe811_checkid(FAR struct stmpe811_dev_s *priv) -{ - uint16_t devid = 0; - - /* Read device ID */ - - devid = stmpe811_getreg8(priv, STMPE811_CHIP_ID); - devid = (uint32_t)(devid << 8); - devid |= (uint32_t)stmpe811_getreg8(priv, STMPE811_CHIP_ID+1); - ivdbg("devid: %04x\n", devid); - - if (devid != (uint16_t)CHIP_ID) - { - /* ID is not Correct */ - - return -ENODEV; - } - - return OK; -} - -/**************************************************************************** - * Name: stmpe811_reset - * - * Description: - * Reset the STMPE811 - * - ****************************************************************************/ - -static void stmpe811_reset(FAR struct stmpe811_dev_s *priv) -{ - /* Power Down the STMPE811 */ - - stmpe811_putreg8(priv, STMPE811_SYS_CTRL1, SYS_CTRL1_SOFTRESET); - - /* Wait a bit */ - - usleep(20*1000); - - /* Then power on again. All registers will be in their reset state. */ - - stmpe811_putreg8(priv, STMPE811_SYS_CTRL1, 0); -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: stmpe811_instantiate - * - * Description: - * Instantiate and configure the STMPE811 device driver to use the provided - * I2C or SPIdevice instance. - * - * Input Parameters: - * dev - An I2C or SPI driver instance - * config - Persistant board configuration data - * - * Returned Value: - * A non-zero handle is returned on success. This handle may then be used - * to configure the STMPE811 driver as necessary. A NULL handle value is - * returned on failure. - * - ****************************************************************************/ - -#ifdef CONFIG_STMPE811_SPI -STMPE811_HANDLE stmpe811_instantiate(FAR struct spi_dev_s *dev, - FAR struct stmpe811_config_s *config) -#else -STMPE811_HANDLE stmpe811_instantiate(FAR struct i2c_dev_s *dev, - FAR struct stmpe811_config_s *config) -#endif -{ - FAR struct stmpe811_dev_s *priv; - uint8_t regval; - int ret; - - /* Allocate the device state structure */ - -#ifdef CONFIG_STMPE811_MULTIPLE - priv = (FAR struct stmpe811_dev_s *)kzalloc(sizeof(struct stmpe811_dev_s)); - if (!priv) - { - return NULL; - } - - /* And save the device structure in the list of STMPE811 so that we can find it later */ - - priv->flink = g_stmpe811list; - g_stmpe811list = priv; -#else - - /* Use the one-and-only STMPE811 driver instance */ - - priv = &g_stmpe811; -#endif - - /* Initialize the device state structure */ - - sem_init(&priv->exclsem, 0, 1); - priv->config = config; - -#ifdef CONFIG_STMPE811_SPI - priv->spi = dev; -#else - priv->i2c = dev; - - /* Set the I2C address and frequency. REVISIT: This logic would be - * insufficient if we share the I2C bus with any other devices that also - * modify the address and frequency. - */ - - I2C_SETADDRESS(dev, config->address, 7); - I2C_SETFREQUENCY(dev, config->frequency); -#endif - - /* Read and verify the STMPE811 chip ID */ - - ret = stmpe811_checkid(priv); - if (ret < 0) - { -#ifdef CONFIG_STMPE811_MULTIPLE - kfree(priv); -#endif - return NULL; - } - - /* Generate STMPE811 Software reset */ - - stmpe811_reset(priv); - - /* Configure the interrupt output pin to generate interrupts on high or low level. */ - - regval = stmpe811_getreg8(priv, STMPE811_INT_CTRL); -#ifdef CONFIG_STMPE811_ACTIVELOW - regval &= ~INT_CTRL_INT_POLARITY; /* Pin polarity: Active low / falling edge */ -#else - regval |= INT_CTRL_INT_POLARITY; /* Pin polarity: Active high / rising edge */ -#endif -#ifdef CONFIG_STMPE811_EDGE - regval |= INT_CTRL_INT_TYPE; /* Edge interrupt */ -#else - regval &= ~INT_CTRL_INT_TYPE; /* Level interrupt */ -#endif - stmpe811_putreg8(priv, STMPE811_INT_CTRL, regval); - - /* Attach the STMPE811 interrupt handler. */ - - config->attach(config, stmpe811_interrupt); - - /* Clear any pending interrupts */ - - stmpe811_putreg8(priv, STMPE811_INT_STA, INT_ALL); - config->clear(config); - config->enable(config, true); - - /* Enable global interrupts */ - - regval = stmpe811_getreg8(priv, STMPE811_INT_CTRL); - regval |= INT_CTRL_GLOBAL_INT; - stmpe811_putreg8(priv, STMPE811_INT_CTRL, regval); - - /* Return our private data structure as an opaque handle */ - - return (STMPE811_HANDLE)priv; -} - -/**************************************************************************** - * Name: stmpe811_getreg8 - * - * Description: - * Read from an 8-bit STMPE811 register - * - ****************************************************************************/ - -#ifdef CONFIG_STMPE811_I2C -uint8_t stmpe811_getreg8(FAR struct stmpe811_dev_s *priv, uint8_t regaddr) -{ - /* 8-bit data read sequence: - * - * Start - I2C_Write_Address - STMPE811_Reg_Address - - * Repeated_Start - I2C_Read_Address - STMPE811_Read_Data - STOP - */ - - struct i2c_msg_s msg[2]; - uint8_t regval; - int ret; - - /* Setup 8-bit STMPE811 address write message */ - - msg[0].addr = priv->config->address; /* 7-bit address */ - msg[0].flags = 0; /* Write transaction, beginning with START */ - msg[0].buffer = ®addr; /* Transfer from this address */ - msg[0].length = 1; /* Send one byte following the address - * (no STOP) */ - - /* Set up the 8-bit STMPE811 data read message */ - - msg[1].addr = priv->config->address; /* 7-bit address */ - msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */ - msg[1].buffer = ®val; /* Transfer to this address */ - msg[1].length = 1; /* Receive one byte following the address - * (then STOP) */ - - /* Perform the transfer */ - - ret = I2C_TRANSFER(priv->i2c, msg, 2); - if (ret < 0) - { - idbg("I2C_TRANSFER failed: %d\n", ret); - return 0; - } - -#ifdef CONFIG_STMPE811_REGDEBUG - dbg("%02x->%02x\n", regaddr, regval); -#endif - return regval; -} -#endif - -/**************************************************************************** - * Name: stmpe811_putreg8 - * - * Description: - * Write a value to an 8-bit STMPE811 register - * - ****************************************************************************/ - -#ifdef CONFIG_STMPE811_I2C -void stmpe811_putreg8(FAR struct stmpe811_dev_s *priv, - uint8_t regaddr, uint8_t regval) -{ - /* 8-bit data read sequence: - * - * Start - I2C_Write_Address - STMPE811_Reg_Address - STMPE811_Write_Data - STOP - */ - - struct i2c_msg_s msg; - uint8_t txbuffer[2]; - int ret; - -#ifdef CONFIG_STMPE811_REGDEBUG - dbg("%02x<-%02x\n", regaddr, regval); -#endif - - /* Setup to the data to be transferred. Two bytes: The STMPE811 register - * address followed by one byte of data. - */ - - txbuffer[0] = regaddr; - txbuffer[1] = regval; - - /* Setup 8-bit STMPE811 address write message */ - - msg.addr = priv->config->address; /* 7-bit address */ - msg.flags = 0; /* Write transaction, beginning with START */ - msg.buffer = txbuffer; /* Transfer from this address */ - msg.length = 2; /* Send two byte following the address - * (then STOP) */ - - /* Perform the transfer */ - - ret = I2C_TRANSFER(priv->i2c, &msg, 1); - if (ret < 0) - { - idbg("I2C_TRANSFER failed: %d\n", ret); - } -} -#endif - -/**************************************************************************** - * Name: stmpe811_getreg16 - * - * Description: - * Read 16-bits of data from an STMPE-11 register - * - ****************************************************************************/ - -#ifdef CONFIG_STMPE811_I2C -uint16_t stmpe811_getreg16(FAR struct stmpe811_dev_s *priv, uint8_t regaddr) -{ - /* 16-bit data read sequence: - * - * Start - I2C_Write_Address - STMPE811_Reg_Address - - * Repeated_Start - I2C_Read_Address - STMPE811_Read_Data_1 - - * STMPE811_Read_Data_2 - STOP - */ - - - struct i2c_msg_s msg[2]; - uint8_t rxbuffer[2]; - int ret; - - /* Setup 8-bit STMPE811 address write message */ - - msg[0].addr = priv->config->address; /* 7-bit address */ - msg[0].flags = 0; /* Write transaction, beginning with START */ - msg[0].buffer = ®addr; /* Transfer from this address */ - msg[0].length = 1; /* Send one byte following the address - * (no STOP) */ - - /* Set up the 8-bit STMPE811 data read message */ - - msg[1].addr = priv->config->address; /* 7-bit address */ - msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */ - msg[1].buffer = rxbuffer; /* Transfer to this address */ - msg[1].length = 2; /* Receive two bytes following the address - * (then STOP) */ - - /* Perform the transfer */ - - ret = I2C_TRANSFER(priv->i2c, msg, 2); - if (ret < 0) - { - idbg("I2C_TRANSFER failed: %d\n", ret); - return 0; - } - -#ifdef CONFIG_STMPE811_REGDEBUG - dbg("%02x->%02x%02x\n", regaddr, rxbuffer[0], rxbuffer[1]); -#endif - return (uint16_t)rxbuffer[0] << 8 | (uint16_t)rxbuffer[1]; -} -#endif - -#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE811 */ - |