diff options
Diffstat (limited to 'firmware/usrp3/lib/fw_comm_protocol.c')
| -rw-r--r-- | firmware/usrp3/lib/fw_comm_protocol.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/firmware/usrp3/lib/fw_comm_protocol.c b/firmware/usrp3/lib/fw_comm_protocol.c new file mode 100644 index 000000000..0cc931a76 --- /dev/null +++ b/firmware/usrp3/lib/fw_comm_protocol.c @@ -0,0 +1,105 @@ +// +// 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/common/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; +} |