2 * Author: Henry Bruce <henry.bruce@intel.com>
3 * Copyright (c) 2015 Intel Corporation.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #include "linux/i2c-dev.h"
30 #include "libft4222.h"
31 #include "usb/ftdi_ft4222.h"
33 #define PLATFORM_NAME "FTDI FT4222"
34 #define I2CM_ERROR(status) (((status) & 0x02) != 0)
37 static FT_HANDLE ftHandle = (FT_HANDLE)NULL;
38 static int bus_speed = 400;
42 mraa_ftdi_ft4222_init()
44 mraa_result_t mraaStatus = MRAA_SUCCESS;
46 FT_DEVICE_LIST_INFO_NODE *devInfo = NULL;
51 ftStatus = FT_CreateDeviceInfoList(&numDevs);
52 if (ftStatus != FT_OK)
54 syslog(LOG_ERR, "FT_CreateDeviceInfoList failed: error code %d\n", ftStatus);
55 mraaStatus = MRAA_ERROR_NO_RESOURCES;
61 syslog(LOG_ERR, "No FT4222 devices connected.\n");
65 devInfo = calloc((size_t)numDevs, sizeof(FT_DEVICE_LIST_INFO_NODE));
68 syslog(LOG_ERR, "FT4222 allocation failure.\n");
69 mraaStatus = MRAA_ERROR_NO_RESOURCES;
73 ftStatus = FT_GetDeviceInfoList(devInfo, &numDevs);
74 if (ftStatus != FT_OK)
76 syslog(LOG_ERR, "FT_GetDeviceInfoList failed (error code %d)\n", (int)ftStatus);
77 mraaStatus = MRAA_ERROR_NO_RESOURCES;
81 syslog(LOG_INFO, "FT_GetDeviceInfoList returned %d devices\n", numDevs);
84 if (numDevs > bus && devInfo[bus].Type == FT_DEVICE_4222H_3) {
85 locationId = devInfo[bus].LocId;
87 syslog(LOG_ERR, "FT_GetDeviceInfoList contains no valid devices\n");
88 mraaStatus = MRAA_ERROR_NO_RESOURCES;
92 ftStatus = FT_OpenEx((PVOID)(uintptr_t)locationId, FT_OPEN_BY_LOCATION, &ftHandle);
93 if (ftStatus != FT_OK)
95 syslog(LOG_ERR, "FT_OpenEx failed (error %d)\n", (int)ftStatus);
96 mraaStatus = MRAA_ERROR_NO_RESOURCES;
101 if (devInfo != NULL);
103 if (mraaStatus == MRAA_SUCCESS)
104 syslog(LOG_NOTICE, "mraa_ftdi_ft4222_init completed successfully\n");
110 mraa_ftdi_ft4222_get_version(unsigned int* versionChip, unsigned int* versionLib)
112 if (ftHandle != NULL) {
113 FT4222_Version ft4222Version;
114 FT4222_STATUS ft4222Status = FT4222_GetVersion(ftHandle, &ft4222Version);
115 if (FT4222_OK == ft4222Status){
116 *versionChip = (unsigned int)ft4222Version.chipVersion;
117 *versionLib = (unsigned int)ft4222Version.dllVersion;
118 syslog(LOG_NOTICE, "FT4222_GetVersion %08X %08X\n", *versionChip, *versionLib);
121 syslog(LOG_ERR, "libmraa: FT4222_GetVersion failed (error %d)\n", (int)ft4222Status);
122 return MRAA_ERROR_NO_RESOURCES;
125 syslog(LOG_ERR, "libmraa: bad FT4222 handle\n");
126 return MRAA_ERROR_INVALID_HANDLE;
132 mraa_ftdi_ft4222_i2c_init_raw(unsigned int bus)
134 // Tell the FT4222 to be an I2C Master.
135 FT4222_STATUS ft4222Status = FT4222_I2CMaster_Init(ftHandle, bus_speed);
136 if (FT4222_OK != ft4222Status)
138 syslog(LOG_ERR, "FT4222_I2CMaster_Init failed (error %d)!\n", ft4222Status);
142 // Reset the I2CM registers to a known state.
143 ft4222Status = FT4222_I2CMaster_Reset(ftHandle);
144 if (FT4222_OK != ft4222Status)
146 syslog(LOG_ERR, "FT4222_I2CMaster_Reset failed (error %d)!\n", ft4222Status);
150 mraa_i2c_context dev = (mraa_i2c_context) malloc(sizeof(struct _i2c));
152 syslog(LOG_CRIT, "i2c: Failed to allocate memory for context");
156 dev->handle = ftHandle;
157 dev->fh = -1; // We don't use file descriptors
158 dev->funcs = I2C_FUNC_I2C; // Advertise minimal i2c support as per https://www.kernel.org/doc/Documentation/i2c/functionality
163 mraa_ftdi_ft4222_i2c_init_bus_replace(mraa_i2c_context dev)
165 // Tell the FT4222 to be an I2C Master.
166 FT4222_STATUS ft4222Status = FT4222_I2CMaster_Init(ftHandle, 400);
167 if (FT4222_OK != ft4222Status)
169 syslog(LOG_ERR, "FT4222_I2CMaster_Init failed (error %d)!\n", ft4222Status);
170 return MRAA_ERROR_NO_RESOURCES;
173 // Reset the I2CM registers to a known state.
174 ft4222Status = FT4222_I2CMaster_Reset(ftHandle);
175 if (FT4222_OK != ft4222Status)
177 syslog(LOG_ERR, "FT4222_I2CMaster_Reset failed (error %d)!\n", ft4222Status);
178 return MRAA_ERROR_NO_RESOURCES;
181 dev->handle = ftHandle;
182 dev->fh = -1; // We don't use file descriptors
183 dev->funcs = I2C_FUNC_I2C; // Advertise minimal i2c support as per https://www.kernel.org/doc/Documentation/i2c/functionality
189 mraa_ftdi_ft4222_i2c_frequency(mraa_i2c_context dev, mraa_i2c_mode_t mode)
191 return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
196 mraa_ftdi_ft4222_i2c_address(mraa_i2c_context dev, uint8_t addr)
198 dev->addr = (int) addr;
199 return FT4222_I2CMaster_Init(ftHandle, bus_speed) == FT4222_OK ? MRAA_SUCCESS : MRAA_ERROR_NO_RESOURCES;
204 mraa_ftdi_ft4222_i2c_read(mraa_i2c_context dev, uint8_t* data, int length)
206 uint16 bytesRead = 0;
207 uint8 controllerStatus;
208 syslog(LOG_NOTICE, "FT4222_I2CMaster_Read(%02X, %d)", dev->addr, length);
209 FT4222_STATUS ft4222Status = FT4222_I2CMaster_Read(dev->handle, dev->addr, data, length, &bytesRead);
210 ft4222Status = FT4222_I2CMaster_GetStatus(ftHandle, &controllerStatus);
211 if (FT4222_OK != ft4222Status || I2CM_ERROR(controllerStatus))
213 syslog(LOG_ERR, "FT4222_I2CMaster_Read failed (error %d)\n", (int)ft4222Status);
220 mraa_ftdi_ft4222_i2c_read_byte(mraa_i2c_context dev)
226 mraa_ftdi_ft4222_i2c_read_byte_data(mraa_i2c_context dev, uint8_t command)
232 mraa_ftdi_ft4222_i2c_read_word_data(mraa_i2c_context dev, uint8_t command)
238 mraa_ftdi_ft4222_i2c_read_bytes_data(mraa_i2c_context dev, uint8_t command, uint8_t* data, int length)
245 mraa_ftdi_ft4222_i2c_write(mraa_i2c_context dev, const uint8_t* data, int bytesToWrite)
247 uint16 bytesWritten = 0;
248 uint8 controllerStatus;
249 syslog(LOG_NOTICE, "FT4222_I2CMaster_Write(%#02X, %#02X, %d)", dev->addr, *data, bytesToWrite);
250 FT4222_STATUS ft4222Status = FT4222_I2CMaster_Write(dev->handle, dev->addr, (uint8_t*)data, bytesToWrite, &bytesWritten);
251 ft4222Status = FT4222_I2CMaster_GetStatus(ftHandle, &controllerStatus);
252 if (FT4222_OK != ft4222Status || I2CM_ERROR(controllerStatus))
254 syslog(LOG_ERR, "FT4222_I2CMaster_Write failed (error %d)\n", (int)ft4222Status);
255 return MRAA_ERROR_INVALID_HANDLE;
258 if (bytesWritten != bytesToWrite)
259 syslog(LOG_ERR, "FT4222_I2CMaster_Write wrote %u of %u bytes.\n", bytesWritten, bytesToWrite);
261 return bytesToWrite == bytesWritten ? MRAA_SUCCESS : MRAA_ERROR_INVALID_HANDLE;
266 mraa_ftdi_ft4222_i2c_write_byte(mraa_i2c_context dev, uint8_t data)
268 return mraa_ftdi_ft4222_i2c_write(dev, &data, 1);
272 mraa_ftdi_ft4222_i2c_write_byte_data(mraa_i2c_context dev, const uint8_t data, const uint8_t command)
274 mraa_result_t status = mraa_ftdi_ft4222_i2c_write_byte(dev, command);
275 if (status == MRAA_SUCCESS)
276 return mraa_ftdi_ft4222_i2c_write_byte(dev, data);
282 mraa_ftdi_ft4222_i2c_write_word_data(mraa_i2c_context dev, const uint16_t data, const uint8_t command)
284 mraa_result_t status = mraa_ftdi_ft4222_i2c_write_byte(dev, command);
285 if (status == MRAA_SUCCESS)
286 return mraa_ftdi_ft4222_i2c_write(dev, (const uint8_t*)&data, 2);
293 mraa_ftdi_ft4222_i2c_stop(mraa_i2c_context dev)
302 mraa_i2c_ft4222_create_func_table()
304 mraa_adv_func_t* func_table = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t));
305 if (func_table != NULL) {
306 // func_table->i2c_init_raw_replace = &mraa_ftdi_ft4222_i2c_init_raw;
307 func_table->i2c_init_bus_replace = &mraa_ftdi_ft4222_i2c_init_bus_replace;
308 func_table->i2c_set_frequency_replace = &mraa_ftdi_ft4222_i2c_frequency;
309 func_table->i2c_address_replace = &mraa_ftdi_ft4222_i2c_address;
310 func_table->i2c_read_replace = &mraa_ftdi_ft4222_i2c_read;
311 func_table->i2c_read_byte_replace = &mraa_ftdi_ft4222_i2c_read_byte;
312 func_table->i2c_read_byte_data_replace = &mraa_ftdi_ft4222_i2c_read_byte_data;
313 func_table->i2c_read_word_data_replace = &mraa_ftdi_ft4222_i2c_read_word_data;
314 func_table->i2c_read_bytes_data_replace = &mraa_ftdi_ft4222_i2c_read_bytes_data;
315 func_table->i2c_write_replace = &mraa_ftdi_ft4222_i2c_write;
316 func_table->i2c_write_byte_replace = &mraa_ftdi_ft4222_i2c_write_byte;
317 func_table->i2c_write_byte_data_replace = &mraa_ftdi_ft4222_i2c_write_byte_data;
318 func_table->i2c_write_word_data_replace = &mraa_ftdi_ft4222_i2c_write_word_data;
319 func_table->i2c_stop_replace = &mraa_ftdi_ft4222_i2c_stop;
325 mraa_ftdi_ft4222(mraa_board_t* board)
329 mraa_board_t* sub_plat = (mraa_board_t*) calloc(1, sizeof(mraa_board_t));
330 if (sub_plat == NULL)
334 int numUsbPins = numUsbGpio + 2; // Add SDA and SCL
335 sub_plat->platform_type = MRAA_FTDI_FT4222;
336 sub_plat->platform_name = PLATFORM_NAME;
337 sub_plat->phy_pin_count = numUsbPins;
338 sub_plat->gpio_count = numUsbGpio;
339 mraa_pininfo_t* pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * numUsbPins);
343 sub_plat->pins = pins;
345 // Virtual gpio pins on i2c I/O expander.
346 mraa_pincapabilities_t pinCapsGpio = (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 };
347 for (pinIndex=0; pinIndex < numUsbGpio; ++pinIndex) {
349 sprintf(name, "Pin%d", pinIndex);
350 strncpy(sub_plat->pins[pinIndex].name, name, 8);
351 sub_plat->pins[pinIndex].capabilites = pinCapsGpio;
355 sub_plat->i2c_bus_count = 1;
356 sub_plat->def_i2c_bus = bus;
357 sub_plat->i2c_bus[bus].bus_id = bus;
358 // sub_plat->i2c_bus[bus].drv_type = drv_type;
360 // i2c pins (these are virtual, entries are required to configure i2c layer)
361 mraa_pincapabilities_t pinCapsI2c = (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 1, 0, 0 };
362 strncpy(sub_plat->pins[pinIndex].name, "SDA", 8);
363 sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
364 sub_plat->pins[pinIndex].i2c.mux_total = 0;
365 sub_plat->i2c_bus[bus].sda = pinIndex;
367 strncpy(sub_plat->pins[pinIndex].name, "SCL", 8);
368 sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
369 sub_plat->pins[pinIndex].i2c.mux_total = 0;
370 sub_plat->i2c_bus[bus].scl = pinIndex;
372 // Set override functions
373 sub_plat->adv_func = mraa_i2c_ft4222_create_func_table();
375 board->sub_platform = sub_plat;