/* * Author: Henry Bruce * Copyright (c) 2015 Intel Corporation. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include #include #include "linux/i2c-dev.h" #include "common.h" #include "ftd2xx.h" #include "libft4222.h" #include "usb/ftdi_ft4222.h" #define PLATFORM_NAME "FTDI FT4222" #define I2CM_ERROR(status) (((status) & 0x02) != 0) static FT_HANDLE ftHandle = (FT_HANDLE)NULL; static int bus_speed = 400; mraa_result_t mraa_ftdi_ft4222_init() { mraa_result_t mraaStatus = MRAA_SUCCESS; FT_STATUS ftStatus; FT_DEVICE_LIST_INFO_NODE *devInfo = NULL; DWORD numDevs = 0; int i; int retCode = 0; ftStatus = FT_CreateDeviceInfoList(&numDevs); if (ftStatus != FT_OK) { syslog(LOG_ERR, "FT_CreateDeviceInfoList failed: error code %d\n", ftStatus); mraaStatus = MRAA_ERROR_NO_RESOURCES; goto init_exit; } if (numDevs == 0) { syslog(LOG_ERR, "No FT4222 devices connected.\n"); goto init_exit; } devInfo = calloc((size_t)numDevs, sizeof(FT_DEVICE_LIST_INFO_NODE)); if (devInfo == NULL) { syslog(LOG_ERR, "FT4222 allocation failure.\n"); mraaStatus = MRAA_ERROR_NO_RESOURCES; goto init_exit; } ftStatus = FT_GetDeviceInfoList(devInfo, &numDevs); if (ftStatus != FT_OK) { syslog(LOG_ERR, "FT_GetDeviceInfoList failed (error code %d)\n", (int)ftStatus); mraaStatus = MRAA_ERROR_NO_RESOURCES; goto init_exit; } syslog(LOG_INFO, "FT_GetDeviceInfoList returned %d devices\n", numDevs); DWORD locationId; int bus = 0; if (numDevs > bus && devInfo[bus].Type == FT_DEVICE_4222H_3) { locationId = devInfo[bus].LocId; } else { syslog(LOG_ERR, "FT_GetDeviceInfoList contains no valid devices\n"); mraaStatus = MRAA_ERROR_NO_RESOURCES; goto init_exit; } ftStatus = FT_OpenEx((PVOID)(uintptr_t)locationId, FT_OPEN_BY_LOCATION, &ftHandle); if (ftStatus != FT_OK) { syslog(LOG_ERR, "FT_OpenEx failed (error %d)\n", (int)ftStatus); mraaStatus = MRAA_ERROR_NO_RESOURCES; goto init_exit; } init_exit: if (devInfo != NULL); free(devInfo); if (mraaStatus == MRAA_SUCCESS) syslog(LOG_NOTICE, "mraa_ftdi_ft4222_init completed successfully\n"); return mraaStatus; } mraa_result_t mraa_ftdi_ft4222_get_version(unsigned int* versionChip, unsigned int* versionLib) { if (ftHandle != NULL) { FT4222_Version ft4222Version; FT4222_STATUS ft4222Status = FT4222_GetVersion(ftHandle, &ft4222Version); if (FT4222_OK == ft4222Status){ *versionChip = (unsigned int)ft4222Version.chipVersion; *versionLib = (unsigned int)ft4222Version.dllVersion; syslog(LOG_NOTICE, "FT4222_GetVersion %08X %08X\n", *versionChip, *versionLib); return MRAA_SUCCESS; } else { syslog(LOG_ERR, "libmraa: FT4222_GetVersion failed (error %d)\n", (int)ft4222Status); return MRAA_ERROR_NO_RESOURCES; } } else { syslog(LOG_ERR, "libmraa: bad FT4222 handle\n"); return MRAA_ERROR_INVALID_HANDLE; } } mraa_i2c_context mraa_ftdi_ft4222_i2c_init_raw(unsigned int bus) { // Tell the FT4222 to be an I2C Master. FT4222_STATUS ft4222Status = FT4222_I2CMaster_Init(ftHandle, bus_speed); if (FT4222_OK != ft4222Status) { syslog(LOG_ERR, "FT4222_I2CMaster_Init failed (error %d)!\n", ft4222Status); return NULL; } // Reset the I2CM registers to a known state. ft4222Status = FT4222_I2CMaster_Reset(ftHandle); if (FT4222_OK != ft4222Status) { syslog(LOG_ERR, "FT4222_I2CMaster_Reset failed (error %d)!\n", ft4222Status); return NULL; } mraa_i2c_context dev = (mraa_i2c_context) malloc(sizeof(struct _i2c)); if (dev == NULL) { syslog(LOG_CRIT, "i2c: Failed to allocate memory for context"); return NULL; } dev->handle = ftHandle; dev->fh = -1; // We don't use file descriptors dev->funcs = I2C_FUNC_I2C; // Advertise minimal i2c support as per https://www.kernel.org/doc/Documentation/i2c/functionality return dev; } static mraa_result_t mraa_ftdi_ft4222_i2c_init_bus_replace(mraa_i2c_context dev) { // Tell the FT4222 to be an I2C Master. FT4222_STATUS ft4222Status = FT4222_I2CMaster_Init(ftHandle, 400); if (FT4222_OK != ft4222Status) { syslog(LOG_ERR, "FT4222_I2CMaster_Init failed (error %d)!\n", ft4222Status); return MRAA_ERROR_NO_RESOURCES; } // Reset the I2CM registers to a known state. ft4222Status = FT4222_I2CMaster_Reset(ftHandle); if (FT4222_OK != ft4222Status) { syslog(LOG_ERR, "FT4222_I2CMaster_Reset failed (error %d)!\n", ft4222Status); return MRAA_ERROR_NO_RESOURCES; } dev->handle = ftHandle; dev->fh = -1; // We don't use file descriptors dev->funcs = I2C_FUNC_I2C; // Advertise minimal i2c support as per https://www.kernel.org/doc/Documentation/i2c/functionality return MRAA_SUCCESS; } static mraa_result_t mraa_ftdi_ft4222_i2c_frequency(mraa_i2c_context dev, mraa_i2c_mode_t mode) { return MRAA_ERROR_FEATURE_NOT_SUPPORTED; } static mraa_result_t mraa_ftdi_ft4222_i2c_address(mraa_i2c_context dev, uint8_t addr) { dev->addr = (int) addr; return FT4222_I2CMaster_Init(ftHandle, bus_speed) == FT4222_OK ? MRAA_SUCCESS : MRAA_ERROR_NO_RESOURCES; } static int mraa_ftdi_ft4222_i2c_read(mraa_i2c_context dev, uint8_t* data, int length) { uint16 bytesRead = 0; uint8 controllerStatus; syslog(LOG_NOTICE, "FT4222_I2CMaster_Read(%02X, %d)", dev->addr, length); FT4222_STATUS ft4222Status = FT4222_I2CMaster_Read(dev->handle, dev->addr, data, length, &bytesRead); ft4222Status = FT4222_I2CMaster_GetStatus(ftHandle, &controllerStatus); if (FT4222_OK != ft4222Status || I2CM_ERROR(controllerStatus)) { syslog(LOG_ERR, "FT4222_I2CMaster_Read failed (error %d)\n", (int)ft4222Status); return 0; } return bytesRead; } static uint8_t mraa_ftdi_ft4222_i2c_read_byte(mraa_i2c_context dev) { return 0; } static uint8_t mraa_ftdi_ft4222_i2c_read_byte_data(mraa_i2c_context dev, uint8_t command) { return 0; } static uint16_t mraa_ftdi_ft4222_i2c_read_word_data(mraa_i2c_context dev, uint8_t command) { return 0; } static int mraa_ftdi_ft4222_i2c_read_bytes_data(mraa_i2c_context dev, uint8_t command, uint8_t* data, int length) { return -1; } static mraa_result_t mraa_ftdi_ft4222_i2c_write(mraa_i2c_context dev, const uint8_t* data, int bytesToWrite) { uint16 bytesWritten = 0; uint8 controllerStatus; syslog(LOG_NOTICE, "FT4222_I2CMaster_Write(%#02X, %#02X, %d)", dev->addr, *data, bytesToWrite); FT4222_STATUS ft4222Status = FT4222_I2CMaster_Write(dev->handle, dev->addr, (uint8_t*)data, bytesToWrite, &bytesWritten); ft4222Status = FT4222_I2CMaster_GetStatus(ftHandle, &controllerStatus); if (FT4222_OK != ft4222Status || I2CM_ERROR(controllerStatus)) { syslog(LOG_ERR, "FT4222_I2CMaster_Write failed (error %d)\n", (int)ft4222Status); return MRAA_ERROR_INVALID_HANDLE; } if (bytesWritten != bytesToWrite) syslog(LOG_ERR, "FT4222_I2CMaster_Write wrote %u of %u bytes.\n", bytesWritten, bytesToWrite); return bytesToWrite == bytesWritten ? MRAA_SUCCESS : MRAA_ERROR_INVALID_HANDLE; } static mraa_result_t mraa_ftdi_ft4222_i2c_write_byte(mraa_i2c_context dev, uint8_t data) { return mraa_ftdi_ft4222_i2c_write(dev, &data, 1); } static mraa_result_t mraa_ftdi_ft4222_i2c_write_byte_data(mraa_i2c_context dev, const uint8_t data, const uint8_t command) { mraa_result_t status = mraa_ftdi_ft4222_i2c_write_byte(dev, command); if (status == MRAA_SUCCESS) return mraa_ftdi_ft4222_i2c_write_byte(dev, data); else return status; } static mraa_result_t mraa_ftdi_ft4222_i2c_write_word_data(mraa_i2c_context dev, const uint16_t data, const uint8_t command) { mraa_result_t status = mraa_ftdi_ft4222_i2c_write_byte(dev, command); if (status == MRAA_SUCCESS) return mraa_ftdi_ft4222_i2c_write(dev, (const uint8_t*)&data, 2); else return status; } static mraa_result_t mraa_ftdi_ft4222_i2c_stop(mraa_i2c_context dev) { return MRAA_SUCCESS; } mraa_adv_func_t* mraa_i2c_ft4222_create_func_table() { mraa_adv_func_t* func_table = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t)); if (func_table != NULL) { // func_table->i2c_init_raw_replace = &mraa_ftdi_ft4222_i2c_init_raw; func_table->i2c_init_bus_replace = &mraa_ftdi_ft4222_i2c_init_bus_replace; func_table->i2c_set_frequency_replace = &mraa_ftdi_ft4222_i2c_frequency; func_table->i2c_address_replace = &mraa_ftdi_ft4222_i2c_address; func_table->i2c_read_replace = &mraa_ftdi_ft4222_i2c_read; func_table->i2c_read_byte_replace = &mraa_ftdi_ft4222_i2c_read_byte; func_table->i2c_read_byte_data_replace = &mraa_ftdi_ft4222_i2c_read_byte_data; func_table->i2c_read_word_data_replace = &mraa_ftdi_ft4222_i2c_read_word_data; func_table->i2c_read_bytes_data_replace = &mraa_ftdi_ft4222_i2c_read_bytes_data; func_table->i2c_write_replace = &mraa_ftdi_ft4222_i2c_write; func_table->i2c_write_byte_replace = &mraa_ftdi_ft4222_i2c_write_byte; func_table->i2c_write_byte_data_replace = &mraa_ftdi_ft4222_i2c_write_byte_data; func_table->i2c_write_word_data_replace = &mraa_ftdi_ft4222_i2c_write_word_data; func_table->i2c_stop_replace = &mraa_ftdi_ft4222_i2c_stop; } return func_table; } mraa_board_t* mraa_ftdi_ft4222(mraa_board_t* board) { if (plat == NULL) return NULL; mraa_board_t* sub_plat = (mraa_board_t*) calloc(1, sizeof(mraa_board_t)); if (sub_plat == NULL) return NULL; int pinIndex = 0; int numUsbGpio = 0; int numUsbPins = numUsbGpio + 2; // Add SDA and SCL sub_plat->platform_name = PLATFORM_NAME; sub_plat->phy_pin_count = numUsbPins; sub_plat->gpio_count = numUsbGpio; mraa_pininfo_t* pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * numUsbPins); if (pins == NULL) { return NULL; } sub_plat->pins = pins; // Virtual gpio pins on i2c I/O expander. mraa_pincapabilities_t pinCapsGpio = (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }; for (pinIndex=0; pinIndex < numUsbGpio; ++pinIndex) { char name[8]; sprintf(name, "Pin%d", pinIndex); strncpy(sub_plat->pins[pinIndex].name, name, 8); sub_plat->pins[pinIndex].capabilites = pinCapsGpio; } int bus = 0; sub_plat->i2c_bus_count = 1; sub_plat->def_i2c_bus = bus; sub_plat->i2c_bus[bus].bus_id = bus; // sub_plat->i2c_bus[bus].drv_type = drv_type; // i2c pins (these are virtual, entries are required to configure i2c layer) mraa_pincapabilities_t pinCapsI2c = (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 1, 0, 0 }; strncpy(sub_plat->pins[pinIndex].name, "SDA", 8); sub_plat->pins[pinIndex].capabilites = pinCapsI2c; sub_plat->pins[pinIndex].i2c.mux_total = 0; sub_plat->i2c_bus[bus].sda = pinIndex; pinIndex++; strncpy(sub_plat->pins[pinIndex].name, "SCL", 8); sub_plat->pins[pinIndex].capabilites = pinCapsI2c; sub_plat->pins[pinIndex].i2c.mux_total = 0; sub_plat->i2c_bus[bus].scl = pinIndex; // Set override functions sub_plat->adv_func = mraa_i2c_ft4222_create_func_table(); board->sub_platform = sub_plat; return sub_plat; }