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//
// Copyright 2014 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "../../../host/lib/usrp/n230/n230_fw_comm_protocol.h"
#include <trace.h>
#include <string.h> //memcmp
bool process_fw_comm_protocol_pkt(
const fw_comm_pkt_t* request,
fw_comm_pkt_t* response,
uint8_t product_id,
uint32_t iface_id,
poke32_func poke_callback,
peek32_func peek_callback)
{
bool send_response = false;
uint16_t signature = request->id;
uint8_t version = FW_COMM_GET_PROTOCOL_VER(request->id);
uint8_t product = FW_COMM_GET_PRODUCT_ID(request->id);
if (signature == FW_COMM_PROTOCOL_SIGNATURE && //Verify protocol
version <= FW_COMM_PROTOCOL_VERSION && //Verify protocol version (older versions supported)
product == product_id) //Verify device
{
//Request is valid. Copy it into the reply.
memcpy(response, request, sizeof(fw_comm_pkt_t));
//Start assuming no error
response->flags &= ~FW_COMM_FLAGS_ERROR_MASK;
//Otherwise, run the command set by the flags
switch (request->flags & FW_COMM_FLAGS_CMD_MASK) {
case FW_COMM_CMD_ECHO: {
UHD_FW_TRACE(DEBUG, "fw_comm_protocol::echo()");
response->data_words = 1;
response->data[0] = iface_id;
} break;
case FW_COMM_CMD_POKE32: {
UHD_FW_TRACE_FSTR(DEBUG, "fw_comm_protocol::poke32(0x%x)=0x%x",
request->addr,*(request->data));
poke_callback(request->addr, *(request->data));
} break;
case FW_COMM_CMD_PEEK32: {
*(response->data) = peek_callback(request->addr);
UHD_FW_TRACE_FSTR(DEBUG, "fw_comm_protocol::peek32(0x%x)=0x%x",
request->addr,*(response->data));
} break;
case FW_COMM_CMD_BLOCK_POKE32: {
if (request->data_words > FW_COMM_MAX_DATA_WORDS) {
response->flags |= FW_COMM_ERR_SIZE_ERROR;
response->data_words = FW_COMM_MAX_DATA_WORDS;
} else {
response->data_words = request->data_words;
}
UHD_FW_TRACE_FSTR(DEBUG, "fw_comm_protocol::block_poke32(0x%x,%d)",request->addr,response->data_words);
for (uint32_t i = 0; i < response->data_words; i++) {
poke_callback(request->addr + (i * sizeof(uint32_t)), request->data[i]);
}
} break;
case FW_COMM_CMD_BLOCK_PEEK32: {
if (request->data_words > FW_COMM_MAX_DATA_WORDS) {
response->flags |= FW_COMM_ERR_SIZE_ERROR;
response->data_words = FW_COMM_MAX_DATA_WORDS;
} else {
response->data_words = request->data_words;
}
for (uint32_t i = 0; i < response->data_words; i++) {
response->data[i] = peek_callback(request->addr + (i * sizeof(uint32_t)));
}
UHD_FW_TRACE_FSTR(DEBUG, "fw_comm_protocol::block_peek32(0x%x,%d)",request->addr,response->data_words);
} break;
default: {
UHD_FW_TRACE(ERROR, "fw_comm_protocol got an invalid command.");
response->flags |= FW_COMM_ERR_CMD_ERROR;
}
}
//Send a reply if ack requested
send_response = (request->flags & FW_COMM_FLAGS_ACK);
} else { //Size, protocol, product check failed
UHD_FW_TRACE(WARN, "fw_comm_protocol ignored an unknown request.");
send_response = false;
}
return send_response;
}
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