diff options
Diffstat (limited to 'nuttx/configs/px4fmu/src/drv_eeprom.c')
| -rw-r--r-- | nuttx/configs/px4fmu/src/drv_eeprom.c | 522 |
1 files changed, 0 insertions, 522 deletions
diff --git a/nuttx/configs/px4fmu/src/drv_eeprom.c b/nuttx/configs/px4fmu/src/drv_eeprom.c deleted file mode 100644 index c22062ec5..000000000 --- a/nuttx/configs/px4fmu/src/drv_eeprom.c +++ /dev/null @@ -1,522 +0,0 @@ -/* - * Copyright (C) 2012 Lorenz Meier. All rights reserved. - * - * 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 of the author or the names of 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. - */ - -/* - * Generic driver for I2C EEPROMs with 8 bit or 16 bit addressing - */ - -#include <nuttx/config.h> - -#include <stdint.h> -#include <stdbool.h> -#include <debug.h> -#include <errno.h> -#include <string.h> -#include <stdio.h> -#include <unistd.h> - -#include <nuttx/i2c.h> -#include <arch/board/board.h> - -#include "up_arch.h" -#include "chip.h" -#include "stm32_internal.h" -#include "px4fmu-internal.h" - -#include <arch/board/drv_eeprom.h> - -/* Split I2C transfers into smaller chunks to make sure to stay within tight timeout limits */ - -/* check defines */ -#ifndef MAX_EEPROMS - #error MAX_EEPROMS number must be defined (1-3) -#endif - -#if (MAX_EEPROMS > 3) - #error Currently only a maximum of three EEPROMS is supported, add missing code around here: __FILE__:__LINE__ -#endif -static int eeprom_open0(FAR struct file *filp); -static int eeprom_close0(FAR struct file *filp); -static ssize_t eeprom_read0(struct file *filp, FAR char *buffer, size_t buflen); -static ssize_t eeprom_write0(struct file *filp, FAR const char *buffer, size_t buflen); -static off_t eeprom_seek0(FAR struct file *filp, off_t offset, int whence); -#if (MAX_EEPROMS > 1) -static int eeprom_open1(FAR struct file *filp); -static int eeprom_close1(FAR struct file *filp); -static ssize_t eeprom_read1(struct file *filp, FAR char *buffer, size_t buflen); -static ssize_t eeprom_write1(struct file *filp, FAR const char *buffer, size_t buflen); -static off_t eeprom_seek1(FAR struct file *filp, off_t offset, int whence); -#endif -#if (MAX_EEPROMS > 2) -static int eeprom_open2(FAR struct file *filp); -static int eeprom_close2(FAR struct file *filp); -static ssize_t eeprom_read2(struct file *filp, FAR char *buffer, size_t buflen); -static ssize_t eeprom_write2(struct file *filp, FAR const char *buffer, size_t buflen); -static off_t eeprom_seek2(FAR struct file *filp, off_t offset, int whence); -#endif - -static const struct file_operations eeprom_fops[MAX_EEPROMS] = {{ - .open = eeprom_open0, - .close = eeprom_close0, - .read = eeprom_read0, - .write = eeprom_write0, - .seek = eeprom_seek0, - .ioctl = 0, -#ifndef CONFIG_DISABLE_POLL - .poll = 0 -#endif -} -#if (MAX_EEPROMS > 1) -,{ - .open = eeprom_open1, - .close = eeprom_close1, - .read = eeprom_read1, - .write = eeprom_write1, - .seek = eeprom_seek1, -} -#endif -#if (MAX_EEPROMS > 2) -,{ - .open = eeprom_open2, - .close = eeprom_close2, - .read = eeprom_read2, - .write = eeprom_write2, - .seek = eeprom_seek2, -} -#endif -}; - -static FAR struct eeprom_dev_s -{ - struct i2c_dev_s *i2c; - uint8_t eeprom_address; - uint16_t eeprom_size_bytes; - uint16_t eeprom_page_size_bytes; - uint16_t eeprom_page_write_time; - off_t offset; - bool is_open; -} eeprom_dev[MAX_EEPROMS]; - -static int -eeprom_open0(FAR struct file *filp) -{ - /* only allow one open at a time */ - if (eeprom_dev[0].is_open) { - errno = EBUSY; - return -EBUSY; - } - /* reset pointer */ - //eeprom_dev[0].is_open = true; - eeprom_dev[0].offset = 0; - return OK; -} -#if (MAX_EEPROMS > 1) -static int -eeprom_open1(FAR struct file *filp) -{ - /* only allow one open at a time */ - if (eeprom_dev[1].is_open) { - errno = EBUSY; - return -EBUSY; - } - /* reset pointer */ - //eeprom_dev[1].is_open = true; - eeprom_dev[1].offset = 0; - return OK; -} -#endif -#if (MAX_EEPROMS > 2) -static int -eeprom_open2(FAR struct file *filp) -{ - /* only allow one open at a time */ - if (eeprom_dev[2].is_open) { - errno = EBUSY; - return -EBUSY; - } - /* reset pointer */ - //eeprom_dev[2].is_open = true; - eeprom_dev[2].offset = 0; - return OK; -} -#endif - -static int -eeprom_close0(FAR struct file *filp) -{ - eeprom_dev[0].is_open = false; - return OK; -} -#if (MAX_EEPROMS > 1) -static int -eeprom_close1(FAR struct file *filp) -{ - eeprom_dev[1].is_open = false; - return OK; -} -#endif -#if (MAX_EEPROMS > 2) -static int -eeprom_close2(FAR struct file *filp) -{ - eeprom_dev[2].is_open = false; - return OK; -} -#endif - -static int -eeprom_read_internal(int dev, uint16_t len, uint8_t *data) -{ - /* abort if the number of requested bytes exceeds the EEPROM size */ - if (eeprom_dev[dev].offset + len > eeprom_dev[dev].eeprom_size_bytes) - { - errno = ENOSPC; - return -ENOSPC; - } - - /* set device address */ - I2C_SETADDRESS(eeprom_dev[dev].i2c, eeprom_dev[dev].eeprom_address, 7); - - uint8_t cmd[2] = {0, 0}; /* first (or only) part of address */ - /* second part of address, omitted if eeprom has 256 bytes or less */ - int ret = 0; - int remaining = len; - int readcounts = 0; - - while (remaining > 0) - { - /* read all requested bytes over potentially multiple pages */ - //int readlen = (remaining < eeprom_dev[dev].eeprom_page_size_bytes) ? remaining : eeprom_dev[dev].eeprom_page_size_bytes; - int read_offset = eeprom_dev[dev].offset + len - remaining;//+ write_counts*eeprom_dev[dev].eeprom_page_size_bytes; - /* set read length to page border */ - int readlen = eeprom_dev[dev].eeprom_page_size_bytes - (read_offset % eeprom_dev[dev].eeprom_page_size_bytes);//(remaining < eeprom_dev[dev].eeprom_page_size_bytes) ? remaining : eeprom_dev[dev].eeprom_page_size_bytes; - /* cap read length if not a full page read is needed */ - if (readlen > remaining) readlen = remaining; - - if (eeprom_dev[dev].eeprom_size_bytes <= 256) - { - cmd[0] = (read_offset); /* set at first byte */ - /* 8 bit addresses */ - ret = I2C_WRITEREAD(eeprom_dev[dev].i2c, cmd, 1, (data+(readcounts*eeprom_dev[dev].eeprom_page_size_bytes)), readlen); - } - else - { - /* 16 bit addresses */ - /* EEPROM: first address high, then address low */ - cmd[0] = (((uint16_t)read_offset) >> 8); - cmd[1] = (((uint8_t)read_offset)); - ret = I2C_WRITEREAD(eeprom_dev[dev].i2c, cmd, 2, (data+(readcounts*eeprom_dev[dev].eeprom_page_size_bytes)), readlen); - } - - /* abort on error */ - if (ret < 0) break; - - /* handled another chunk */ - remaining -= readlen; - readcounts++; - } - - /* use the negated value from I2C_TRANSFER to fill errno */ - errno = -ret; - - /* return len if data was read, < 0 else */ - if (ret == OK) - eeprom_dev[dev].offset += len; - return len; - - /* no data, return negated value from I2C_TRANSFER */ - return ret; -} - -static int -eeprom_write_internal(int dev, uint16_t len, const uint8_t *data) -{ - /* abort if the number of requested bytes exceeds the EEPROM size */ - if (eeprom_dev[dev].offset + len > eeprom_dev[dev].eeprom_size_bytes) - { - errno = ENOSPC; - return -ENOSPC; - } - - int ret = 0; - int remaining = len; - int write_counts = 0; - - uint8_t write_buf[2]; - - while (remaining > 0) - { - /* write all requested bytes over potentially multiple pages */ - int write_offset = eeprom_dev[dev].offset + len - remaining;//+ write_counts*eeprom_dev[dev].eeprom_page_size_bytes; - /* set write length to page border */ - int writelen = eeprom_dev[dev].eeprom_page_size_bytes - (write_offset % eeprom_dev[dev].eeprom_page_size_bytes);//(remaining < eeprom_dev[dev].eeprom_page_size_bytes) ? remaining : eeprom_dev[dev].eeprom_page_size_bytes; - /* cap write length if not a full page write is requested */ - if (writelen > remaining) writelen = remaining; - - if (eeprom_dev[dev].eeprom_size_bytes <= 256) - { - write_buf[0] = (write_offset); /* set at first byte */ - /* 8 bit addresses */ - - const uint8_t* data_ptr = (data+(write_offset)); - - struct i2c_msg_s msgv_eeprom_write[2] = { - { - .addr = eeprom_dev[dev].eeprom_address, - .flags = I2C_M_NORESTART, - .buffer = write_buf, - .length = 1 - }, - { - .addr = eeprom_dev[dev].eeprom_address, - .flags = I2C_M_NORESTART, - .buffer = (uint8_t*)data_ptr, - .length = writelen - } - }; - - - if ( (ret = I2C_TRANSFER(eeprom_dev[dev].i2c, msgv_eeprom_write, 2)) == OK ) - { - //printf("SUCCESS WRITING EEPROM 8BIT ADDR: %d, bytes: %d\n", ret, writelen); - } - } - else - { - /* 16 bit addresses */ - /* EEPROM: first address high, then address low */ - write_buf[0] = (((uint16_t)write_offset) >> 8); - write_buf[1] = (((uint8_t)write_offset)); - - const uint8_t* data_ptr = data+(write_counts*eeprom_dev[dev].eeprom_page_size_bytes); - - struct i2c_msg_s msgv_eeprom_write[2] = { - { - .addr = eeprom_dev[dev].eeprom_address, - .flags = I2C_M_NORESTART, - .buffer = write_buf, - .length = 2 - }, - { - .addr = eeprom_dev[dev].eeprom_address, - .flags = I2C_M_NORESTART, - .buffer = (uint8_t*)data_ptr, - .length = writelen - } - }; - - - if ( (ret = I2C_TRANSFER(eeprom_dev[dev].i2c, msgv_eeprom_write, 2)) == OK ) - { - //printf("SUCCESS WRITING EEPROM 16BIT ADDR: %d, bytes: %d\n", ret, writelen); - } - } - - /* abort on error */ - if (ret < 0) break; - - /* handled another chunk */ - remaining -= writelen; - write_counts++; - /* wait for the device to write the page */ - usleep(eeprom_dev[dev].eeprom_page_write_time); - } - - /* use the negated value from I2C_TRANSFER to fill errno */ - errno = -ret; - - /* return length if data was written, < 0 else */ - if (ret == OK) - eeprom_dev[dev].offset += len; - return len; - - /* no data, return negated value from I2C_TRANSFER */ - return ret; -} - -static ssize_t -eeprom_read0(struct file *filp, char *buffer, size_t buflen) -{ - return eeprom_read_internal(0, buflen, (uint8_t *)buffer); -} -#if (MAX_EEPROMS > 1) -static ssize_t -eeprom_read1(struct file *filp, char *buffer, size_t buflen) -{ - return eeprom_read_internal(1, buflen, (uint8_t *)buffer); -} -#endif -#if (MAX_EEPROMS > 2) -static ssize_t -eeprom_read2(struct file *filp, char *buffer, size_t buflen) -{ - return eeprom_read_internal(2, buflen, (uint8_t *)buffer); -} -#endif - -static ssize_t -eeprom_write0(struct file *filp, const char *buffer, size_t buflen) -{ - return eeprom_write_internal(0, buflen, (const uint8_t *)buffer); -} -#if (MAX_EEPROMS > 1) -static ssize_t -eeprom_write1(struct file *filp, const char *buffer, size_t buflen) -{ - return eeprom_write_internal(1, buflen, (const uint8_t *)buffer); -} -#endif -#if (MAX_EEPROMS > 2) -static ssize_t -eeprom_write2(struct file *filp, const char *buffer, size_t buflen) -{ - return eeprom_write_internal(2, buflen, (const uint8_t *)buffer); -} -#endif - -static off_t eeprom_seek0(FAR struct file *filp, off_t offset, int whence) -{ - switch (whence) - { - case SEEK_SET: - if (offset < eeprom_dev[0].eeprom_size_bytes - 1) { - eeprom_dev[0].offset = offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_CUR: - if (eeprom_dev[0].offset + offset < eeprom_dev[0].eeprom_size_bytes - 1) { - eeprom_dev[0].offset = eeprom_dev[0].offset + offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_END: - errno = ESPIPE; - return -ESPIPE; - break; - } - return eeprom_dev[0].offset; -} -#if (MAX_EEPROMS > 1) -static off_t eeprom_seek1(FAR struct file *filp, off_t offset, int whence) -{ - switch (whence) - { - case SEEK_SET: - if (offset < eeprom_dev[1].eeprom_size_bytes - 1) { - eeprom_dev[1].offset = offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_CUR: - if (eeprom_dev[1].offset + offset < eeprom_dev[1].eeprom_size_bytes - 1) { - eeprom_dev[1].offset = eeprom_dev[1].offset + offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_END: - errno = ESPIPE; - return -ESPIPE; - break; - } - return eeprom_dev[1].offset; -} -#endif -#if (MAX_EEPROMS > 2) -static off_t eeprom_seek2(FAR struct file *filp, off_t offset, int whence) -{ - switch (whence) - { - case SEEK_SET: - if (offset < eeprom_dev[2].eeprom_size_bytes - 1) { - eeprom_dev[2].offset = offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_CUR: - if (eeprom_dev[2].offset + offset < eeprom_dev[2].eeprom_size_bytes - 1) { - eeprom_dev[2].offset = eeprom_dev[2].offset + offset; - } else { - errno = ESPIPE; - return -ESPIPE; - } - break; - case SEEK_END: - errno = ESPIPE; - return -ESPIPE; - break; - } - return eeprom_dev[2].offset; -} -#endif - -int -eeprom_attach(struct i2c_dev_s *i2c, uint8_t device_address, uint16_t total_size_bytes, uint16_t page_size_bytes, uint16_t page_write_time_us, const char* device_name, uint8_t fail_if_missing) -{ - static int eeprom_dev_counter = 0; - eeprom_dev[eeprom_dev_counter].i2c = i2c; - eeprom_dev[eeprom_dev_counter].eeprom_address = device_address; - eeprom_dev[eeprom_dev_counter].eeprom_size_bytes = total_size_bytes; - eeprom_dev[eeprom_dev_counter].eeprom_page_size_bytes = page_size_bytes; - eeprom_dev[eeprom_dev_counter].eeprom_page_write_time = page_write_time_us; - eeprom_dev[eeprom_dev_counter].offset = 0; - eeprom_dev[eeprom_dev_counter].is_open = false; - - int ret; - - if (fail_if_missing) { - /* read first value */ - uint8_t read_test; - ret = (eeprom_read_internal(eeprom_dev_counter, 1, &read_test) == 1) ? OK : ERROR; - } else { - ret = OK; - } - - /* make ourselves available */ - if (ret == OK) - { - register_driver(device_name, &(eeprom_fops[eeprom_dev_counter]), 0666, NULL); - eeprom_dev_counter++; - } - - /* Return 0 for device found, error number else */ - return ret; -} |