+++ /dev/null
-/***************************************************************************
- ftdi.c - description
- -------------------
- begin : Fri Apr 4 2003
- copyright : (C) 2003 by Intra2net AG
- email : opensource@intra2net.com
- ***************************************************************************/
-
-/***************************************************************************
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU Lesser General Public License *
- * version 2.1 as published by the Free Software Foundation; *
- * *
- ***************************************************************************/
-
-#include <usb.h>
-#include <string.h>
-
-#include "ftdi.h"
-
-/* ftdi_init return codes:
- 0: all fine
- -1: couldn't allocate read buffer
-*/
-int ftdi_init(struct ftdi_context *ftdi)
-{
- ftdi->usb_dev = NULL;
- ftdi->usb_read_timeout = 5000;
- ftdi->usb_write_timeout = 5000;
-
- ftdi->type = TYPE_BM; /* chip type */
- ftdi->baudrate = -1;
- ftdi->bitbang_enabled = 0;
-
- ftdi->readbuffer = NULL;
- ftdi->readbuffer_offset = 0;
- ftdi->readbuffer_remaining = 0;
- ftdi->writebuffer_chunksize = 4096;
-
- ftdi->interface = 0;
- ftdi->index = 0;
- ftdi->in_ep = 0x02;
- ftdi->out_ep = 0x81;
- ftdi->bitbang_mode = 1; /* 1: Normal bitbang mode, 2: SPI bitbang mode */
-
- ftdi->error_str = NULL;
-
- /* All fine. Now allocate the readbuffer */
- return ftdi_read_data_set_chunksize(ftdi, 4096);
-}
-
-
-void ftdi_deinit(struct ftdi_context *ftdi)
-{
- if (ftdi->readbuffer != NULL) {
- free(ftdi->readbuffer);
- ftdi->readbuffer = NULL;
- }
-}
-
-
-void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb)
-{
- ftdi->usb_dev = usb;
-}
-
-
-/* ftdi_usb_open return codes:
- 0: all fine
- -1: usb_find_busses() failed
- -2: usb_find_devices() failed
- -3: usb device not found
- -4: unable to open device
- -5: unable to claim device
- -6: reset failed
- -7: set baudrate failed
- -8: get product description failed
- -9: get serial number failed
- -10: unable to close device
-*/
-int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
-{
- return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
-}
-
-int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
- const char* description, const char* serial)
-{
- struct usb_bus *bus;
- struct usb_device *dev;
-
- usb_init();
-
- if (usb_find_busses() < 0) {
- ftdi->error_str = "usb_find_busses() failed";
- return -1;
- }
-
- if (usb_find_devices() < 0) {
- ftdi->error_str = "usb_find_devices() failed";
- return -2;
- }
-
- for (bus = usb_busses; bus; bus = bus->next) {
- for (dev = bus->devices; dev; dev = dev->next) {
- if (dev->descriptor.idVendor == vendor
- && dev->descriptor.idProduct == product) {
- if (!(ftdi->usb_dev = usb_open(dev))) {
- ftdi->error_str = "usb_open() failed";
- return -4;
- }
-
- char string[256];
- if (description != NULL) {
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0) {
- ftdi->error_str = "unable to fetch product description\n";
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- return -8;
- }
- if (strncmp(string, description, sizeof(string)) != 0) {
- ftdi->error_str = "product description not matching\n";
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- continue;
- }
- }
- if (serial != NULL) {
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0) {
- ftdi->error_str = "unable to fetch serial number\n";
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- return -9;
- }
- if (strncmp(string, serial, sizeof(string)) != 0) {
- ftdi->error_str = "serial number not matching\n";
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- continue;
- }
- }
-
- if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) {
- ftdi->error_str = "unable to claim usb device. Make sure ftdi_sio is unloaded!";
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- return -5;
- }
-
- if (ftdi_usb_reset (ftdi) != 0) {
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- return -6;
- }
-
- if (ftdi_set_baudrate (ftdi, 9600) != 0) {
- if (usb_close (ftdi->usb_dev) != 0)
- return -10;
- return -7;
- }
-
- // Try to guess chip type
- // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0
- if (dev->descriptor.bcdDevice == 0x400 || (dev->descriptor.bcdDevice == 0x200
- && dev->descriptor.iSerialNumber == 0))
- ftdi->type = TYPE_BM;
- else if (dev->descriptor.bcdDevice == 0x200)
- ftdi->type = TYPE_AM;
- else if (dev->descriptor.bcdDevice == 0x500)
- ftdi->type = TYPE_2232C;
-
- return 0;
- }
- }
- }
-
- // device not found
- return -3;
-}
-
-
-int ftdi_usb_reset(struct ftdi_context *ftdi)
-{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "FTDI reset failed";
- return -1;
- }
- // Invalidate data in the readbuffer
- ftdi->readbuffer_offset = 0;
- ftdi->readbuffer_remaining = 0;
-
- return 0;
-}
-
-int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
-{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "FTDI purge of RX buffer failed";
- return -1;
- }
- // Invalidate data in the readbuffer
- ftdi->readbuffer_offset = 0;
- ftdi->readbuffer_remaining = 0;
-
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 2, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "FTDI purge of TX buffer failed";
- return -1;
- }
-
-
- return 0;
-}
-
-/* ftdi_usb_close return codes
- 0: all fine
- -1: usb_release failed
- -2: usb_close failed
-*/
-int ftdi_usb_close(struct ftdi_context *ftdi)
-{
- int rtn = 0;
-
- if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0)
- rtn = -1;
-
- if (usb_close (ftdi->usb_dev) != 0)
- rtn = -2;
-
- return rtn;
-}
-
-
-/*
- ftdi_convert_baudrate returns nearest supported baud rate to that requested.
- Function is only used internally
-*/
-static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
- unsigned short *value, unsigned short *index)
-{
- static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
- static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
- static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
- int divisor, best_divisor, best_baud, best_baud_diff;
- unsigned long encoded_divisor;
- int i;
-
- if (baudrate <= 0) {
- // Return error
- return -1;
- }
-
- divisor = 24000000 / baudrate;
-
- if (ftdi->type == TYPE_AM) {
- // Round down to supported fraction (AM only)
- divisor -= am_adjust_dn[divisor & 7];
- }
-
- // Try this divisor and the one above it (because division rounds down)
- best_divisor = 0;
- best_baud = 0;
- best_baud_diff = 0;
- for (i = 0; i < 2; i++) {
- int try_divisor = divisor + i;
- int baud_estimate;
- int baud_diff;
-
- // Round up to supported divisor value
- if (try_divisor < 8) {
- // Round up to minimum supported divisor
- try_divisor = 8;
- } else if (ftdi->type != TYPE_AM && try_divisor < 12) {
- // BM doesn't support divisors 9 through 11 inclusive
- try_divisor = 12;
- } else if (divisor < 16) {
- // AM doesn't support divisors 9 through 15 inclusive
- try_divisor = 16;
- } else {
- if (ftdi->type == TYPE_AM) {
- // Round up to supported fraction (AM only)
- try_divisor += am_adjust_up[try_divisor & 7];
- if (try_divisor > 0x1FFF8) {
- // Round down to maximum supported divisor value (for AM)
- try_divisor = 0x1FFF8;
- }
- } else {
- if (try_divisor > 0x1FFFF) {
- // Round down to maximum supported divisor value (for BM)
- try_divisor = 0x1FFFF;
- }
- }
- }
- // Get estimated baud rate (to nearest integer)
- baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor;
- // Get absolute difference from requested baud rate
- if (baud_estimate < baudrate) {
- baud_diff = baudrate - baud_estimate;
- } else {
- baud_diff = baud_estimate - baudrate;
- }
- if (i == 0 || baud_diff < best_baud_diff) {
- // Closest to requested baud rate so far
- best_divisor = try_divisor;
- best_baud = baud_estimate;
- best_baud_diff = baud_diff;
- if (baud_diff == 0) {
- // Spot on! No point trying
- break;
- }
- }
- }
- // Encode the best divisor value
- encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
- // Deal with special cases for encoded value
- if (encoded_divisor == 1) {
- encoded_divisor = 0; // 3000000 baud
- } else if (encoded_divisor == 0x4001) {
- encoded_divisor = 1; // 2000000 baud (BM only)
- }
- // Split into "value" and "index" values
- *value = (unsigned short)(encoded_divisor & 0xFFFF);
- if(ftdi->type == TYPE_2232C) {
- *index = (unsigned short)(encoded_divisor >> 8);
- *index &= 0xFF00;
- *index |= ftdi->interface;
- }
- else
- *index = (unsigned short)(encoded_divisor >> 16);
-
- // Return the nearest baud rate
- return best_baud;
-}
-
-/*
- ftdi_set_baudrate return codes:
- 0: all fine
- -1: invalid baudrate
- -2: setting baudrate failed
-*/
-int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
-{
- unsigned short value, index;
- int actual_baudrate;
-
- if (ftdi->bitbang_enabled) {
- baudrate = baudrate*4;
- }
-
- actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index);
- if (actual_baudrate <= 0) {
- ftdi->error_str = "Silly baudrate <= 0.";
- return -1;
- }
-
- // Check within tolerance (about 5%)
- if ((actual_baudrate * 2 < baudrate /* Catch overflows */ )
- || ((actual_baudrate < baudrate)
- ? (actual_baudrate * 21 < baudrate * 20)
- : (baudrate * 21 < actual_baudrate * 20))) {
- ftdi->error_str = "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4";
- return -1;
- }
-
- if (usb_control_msg(ftdi->usb_dev, 0x40, 3, value, index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Setting new baudrate failed";
- return -2;
- }
-
- ftdi->baudrate = baudrate;
- return 0;
-}
-
-
-int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
-{
- int ret;
- int offset = 0;
- int total_written = 0;
- while (offset < size) {
- int write_size = ftdi->writebuffer_chunksize;
-
- if (offset+write_size > size)
- write_size = size-offset;
-
- ret = usb_bulk_write(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout);
- if (ret < 0) {
- if (ret == -1)
- ftdi->error_str = "bulk write failed";
- else
- ftdi->error_str = "usb failed";
- return ret;
- }
- total_written += ret;
-
- offset += write_size;
- }
-
- return total_written;
-}
-
-
-int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
-{
- ftdi->writebuffer_chunksize = chunksize;
- return 0;
-}
-
-
-int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
-{
- *chunksize = ftdi->writebuffer_chunksize;
- return 0;
-}
-
-
-int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
-{
- int offset = 0, ret = 1, i, num_of_chunks, chunk_remains;
-
- // everything we want is still in the readbuffer?
- if (size <= ftdi->readbuffer_remaining) {
- memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
-
- // Fix offsets
- ftdi->readbuffer_remaining -= size;
- ftdi->readbuffer_offset += size;
-
- /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
-
- return size;
- }
- // something still in the readbuffer, but not enough to satisfy 'size'?
- if (ftdi->readbuffer_remaining != 0) {
- memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
-
- // Fix offset
- offset += ftdi->readbuffer_remaining;
- }
- // do the actual USB read
- while (offset < size && ret > 0) {
- ftdi->readbuffer_remaining = 0;
- ftdi->readbuffer_offset = 0;
- /* returns how much received */
- ret = usb_bulk_read (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_read_timeout);
-
- if (ret < 0) {
- if (ret == -1)
- ftdi->error_str = "bulk read failed";
- else
- ftdi->error_str = "usb failed";
- return ret;
- }
-
- if (ret > 2) {
- // skip FTDI status bytes.
- // Maybe stored in the future to enable modem use
- num_of_chunks = ret / 64;
- chunk_remains = ret % 64;
- //printf("ret = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", ret, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
-
- ftdi->readbuffer_offset += 2;
- ret -= 2;
-
- if (ret > 64) {
- for (i = 1; i < num_of_chunks; i++)
- memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i,
- ftdi->readbuffer+ftdi->readbuffer_offset+64*i,
- 62);
- if (chunk_remains > 2) {
- memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i,
- ftdi->readbuffer+ftdi->readbuffer_offset+64*i,
- chunk_remains-2);
- ret -= 2*num_of_chunks;
- } else
- ret -= 2*(num_of_chunks-1)+chunk_remains;
- }
- } else if (ret <= 2) {
- // no more data to read?
- return offset;
- }
- if (ret > 0) {
- // data still fits in buf?
- if (offset+ret <= size) {
- memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret);
- //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
- offset += ret;
-
- /* Did we read exactly the right amount of bytes? */
- if (offset == size)
- return offset;
- } else {
- // only copy part of the data or size <= readbuffer_chunksize
- int part_size = size-offset;
- memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size);
-
- ftdi->readbuffer_offset += part_size;
- ftdi->readbuffer_remaining = ret-part_size;
- offset += part_size;
-
- /* printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n",
- part_size, size, offset, ret, ftdi->readbuffer_remaining); */
-
- return offset;
- }
- }
- }
- // never reached
- return -127;
-}
-
-
-int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
-{
- unsigned char *new_buf;
-
- // Invalidate all remaining data
- ftdi->readbuffer_offset = 0;
- ftdi->readbuffer_remaining = 0;
-
- if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) {
- ftdi->error_str = "out of memory for readbuffer";
- return -1;
- }
-
- ftdi->readbuffer = new_buf;
- ftdi->readbuffer_chunksize = chunksize;
-
- return 0;
-}
-
-
-int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
-{
- *chunksize = ftdi->readbuffer_chunksize;
- return 0;
-}
-
-
-
-int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask)
-{
- unsigned short usb_val;
-
- usb_val = bitmask; // low byte: bitmask
- /* FT2232C: Set bitbang_mode to 2 to enable SPI */
- usb_val |= (ftdi->bitbang_mode << 8);
-
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Unable to enter bitbang mode. Perhaps not a BM type chip?";
- return -1;
- }
- ftdi->bitbang_enabled = 1;
- return 0;
-}
-
-
-int ftdi_disable_bitbang(struct ftdi_context *ftdi)
-{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Unable to leave bitbang mode. Perhaps not a BM type chip?";
- return -1;
- }
-
- ftdi->bitbang_enabled = 0;
- return 0;
-}
-
-
-int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
-{
- unsigned short usb_val;
- if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0C, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) {
- ftdi->error_str = "Read pins failed";
- return -1;
- }
-
- *pins = (unsigned char)usb_val;
- return 0;
-}
-
-
-int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
-{
- unsigned short usb_val;
-
- if (latency < 1) {
- ftdi->error_str = "Latency out of range. Only valid for 1-255";
- return -1;
- }
-
- usb_val = latency;
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x09, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Unable to set latency timer";
- return -2;
- }
- return 0;
-}
-
-
-int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
-{
- unsigned short usb_val;
- if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0A, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) {
- ftdi->error_str = "Reading latency timer failed";
- return -1;
- }
-
- *latency = (unsigned char)usb_val;
- return 0;
-}
-
-
-void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom)
-{
- eeprom->vendor_id = 0x0403;
- eeprom->product_id = 0x6001;
-
- eeprom->self_powered = 1;
- eeprom->remote_wakeup = 1;
- eeprom->BM_type_chip = 1;
-
- eeprom->in_is_isochronous = 0;
- eeprom->out_is_isochronous = 0;
- eeprom->suspend_pull_downs = 0;
-
- eeprom->use_serial = 0;
- eeprom->change_usb_version = 0;
- eeprom->usb_version = 0x0200;
- eeprom->max_power = 0;
-
- eeprom->manufacturer = NULL;
- eeprom->product = NULL;
- eeprom->serial = NULL;
-}
-
-
-/*
- ftdi_eeprom_build return codes:
- positive value: used eeprom size
- -1: eeprom size (128 bytes) exceeded by custom strings
-*/
-int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output)
-{
- unsigned char i, j;
- unsigned short checksum, value;
- unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
- int size_check;
-
- if (eeprom->manufacturer != NULL)
- manufacturer_size = strlen(eeprom->manufacturer);
- if (eeprom->product != NULL)
- product_size = strlen(eeprom->product);
- if (eeprom->serial != NULL)
- serial_size = strlen(eeprom->serial);
-
- size_check = 128; // eeprom is 128 bytes
- size_check -= 28; // 28 are always in use (fixed)
- size_check -= manufacturer_size*2;
- size_check -= product_size*2;
- size_check -= serial_size*2;
-
- // eeprom size exceeded?
- if (size_check < 0)
- return (-1);
-
- // empty eeprom
- memset (output, 0, 128);
-
- // Addr 00: Stay 00 00
- // Addr 02: Vendor ID
- output[0x02] = eeprom->vendor_id;
- output[0x03] = eeprom->vendor_id >> 8;
-
- // Addr 04: Product ID
- output[0x04] = eeprom->product_id;
- output[0x05] = eeprom->product_id >> 8;
-
- // Addr 06: Device release number (0400h for BM features)
- output[0x06] = 0x00;
-
- if (eeprom->BM_type_chip == 1)
- output[0x07] = 0x04;
- else
- output[0x07] = 0x02;
-
- // Addr 08: Config descriptor
- // Bit 1: remote wakeup if 1
- // Bit 0: self powered if 1
- //
- j = 0;
- if (eeprom->self_powered == 1)
- j = j | 1;
- if (eeprom->remote_wakeup == 1)
- j = j | 2;
- output[0x08] = j;
-
- // Addr 09: Max power consumption: max power = value * 2 mA
- output[0x09] = eeprom->max_power;
- ;
-
- // Addr 0A: Chip configuration
- // Bit 7: 0 - reserved
- // Bit 6: 0 - reserved
- // Bit 5: 0 - reserved
- // Bit 4: 1 - Change USB version
- // Bit 3: 1 - Use the serial number string
- // Bit 2: 1 - Enable suspend pull downs for lower power
- // Bit 1: 1 - Out EndPoint is Isochronous
- // Bit 0: 1 - In EndPoint is Isochronous
- //
- j = 0;
- if (eeprom->in_is_isochronous == 1)
- j = j | 1;
- if (eeprom->out_is_isochronous == 1)
- j = j | 2;
- if (eeprom->suspend_pull_downs == 1)
- j = j | 4;
- if (eeprom->use_serial == 1)
- j = j | 8;
- if (eeprom->change_usb_version == 1)
- j = j | 16;
- output[0x0A] = j;
-
- // Addr 0B: reserved
- output[0x0B] = 0x00;
-
- // Addr 0C: USB version low byte when 0x0A bit 4 is set
- // Addr 0D: USB version high byte when 0x0A bit 4 is set
- if (eeprom->change_usb_version == 1) {
- output[0x0C] = eeprom->usb_version;
- output[0x0D] = eeprom->usb_version >> 8;
- }
-
-
- // Addr 0E: Offset of the manufacturer string + 0x80
- output[0x0E] = 0x14 + 0x80;
-
- // Addr 0F: Length of manufacturer string
- output[0x0F] = manufacturer_size*2 + 2;
-
- // Addr 10: Offset of the product string + 0x80, calculated later
- // Addr 11: Length of product string
- output[0x11] = product_size*2 + 2;
-
- // Addr 12: Offset of the serial string + 0x80, calculated later
- // Addr 13: Length of serial string
- output[0x13] = serial_size*2 + 2;
-
- // Dynamic content
- output[0x14] = manufacturer_size*2 + 2;
- output[0x15] = 0x03; // type: string
-
- i = 0x16, j = 0;
-
- // Output manufacturer
- for (j = 0; j < manufacturer_size; j++) {
- output[i] = eeprom->manufacturer[j], i++;
- output[i] = 0x00, i++;
- }
-
- // Output product name
- output[0x10] = i + 0x80; // calculate offset
- output[i] = product_size*2 + 2, i++;
- output[i] = 0x03, i++;
- for (j = 0; j < product_size; j++) {
- output[i] = eeprom->product[j], i++;
- output[i] = 0x00, i++;
- }
-
- // Output serial
- output[0x12] = i + 0x80; // calculate offset
- output[i] = serial_size*2 + 2, i++;
- output[i] = 0x03, i++;
- for (j = 0; j < serial_size; j++) {
- output[i] = eeprom->serial[j], i++;
- output[i] = 0x00, i++;
- }
-
- // calculate checksum
- checksum = 0xAAAA;
-
- for (i = 0; i < 63; i++) {
- value = output[i*2];
- value += output[(i*2)+1] << 8;
-
- checksum = value^checksum;
- checksum = (checksum << 1) | (checksum >> 15);
- }
-
- output[0x7E] = checksum;
- output[0x7F] = checksum >> 8;
-
- return size_check;
-}
-
-
-int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
-{
- int i;
-
- for (i = 0; i < 64; i++) {
- if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, i, eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2) {
- ftdi->error_str = "Reading eeprom failed";
- return -1;
- }
- }
-
- return 0;
-}
-
-
-int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
-{
- unsigned short usb_val;
- int i;
-
- for (i = 0; i < 64; i++) {
- usb_val = eeprom[i*2];
- usb_val += eeprom[(i*2)+1] << 8;
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x91, usb_val, i, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Unable to write eeprom";
- return -1;
- }
- }
-
- return 0;
-}
-
-
-int ftdi_erase_eeprom(struct ftdi_context *ftdi)
-{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0) {
- ftdi->error_str = "Unable to erase eeprom";
- return -1;
- }
-
- return 0;
-}
git://developer.intra2net.com / libftdi / blobdiff