diff options
Diffstat (limited to 'firmware/zpu/apps/txrx_uhd.c')
| -rw-r--r-- | firmware/zpu/apps/txrx_uhd.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/firmware/zpu/apps/txrx_uhd.c b/firmware/zpu/apps/txrx_uhd.c new file mode 100644 index 000000000..68c24e872 --- /dev/null +++ b/firmware/zpu/apps/txrx_uhd.c @@ -0,0 +1,409 @@ +// +// Copyright 2010-2011 Ettus Research LLC +// +/* + * Copyright 2007,2008 Free Software Foundation, Inc. + * + * 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/>. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <lwip/ip.h> +#include <lwip/udp.h> +#include "u2_init.h" +#include "memory_map.h" +#include "spi.h" +#include "hal_io.h" +#include "pic.h" +#include <stdbool.h> +#include "ethernet.h" +#include "nonstdio.h" +#include <net/padded_eth_hdr.h> +#include <net_common.h> +#include "memcpy_wa.h" +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include "clocks.h" +#include "usrp2/fw_common.h" +#include <i2c.h> +#include <ethertype.h> +#include <arp_cache.h> +#include "udp_fw_update.h" +#include "pkt_ctrl.h" +#include "banal.h" + +static void setup_network(void); + +// ---------------------------------------------------------------- +// the fast-path setup global variables +// ---------------------------------------------------------------- +static eth_mac_addr_t fp_mac_addr_src, fp_mac_addr_dst; +struct socket_address fp_socket_src, fp_socket_dst; +extern uint16_t dsp0_dst_port, err0_dst_port, dsp1_dst_port; + +static void handle_udp_err0_packet( + struct socket_address src, struct socket_address dst, + unsigned char *payload, int payload_len +){ + sr_udp_sm->err0_port = (((uint32_t)dst.port) << 16) | src.port; + err0_dst_port = src.port; + printf("Storing for async error path:\n"); + printf(" source udp port: %d\n", dst.port); + printf(" destination udp port: %d\n", src.port); + newline(); +} + +static void handle_udp_dsp1_packet( + struct socket_address src, struct socket_address dst, + unsigned char *payload, int payload_len +){ + sr_udp_sm->dsp1_port = (((uint32_t)dst.port) << 16) | src.port; + dsp1_dst_port = src.port; + printf("Storing for dsp1 path:\n"); + printf(" source udp port: %d\n", dst.port); + printf(" destination udp port: %d\n", src.port); + newline(); +} + +static void handle_udp_dsp0_packet( + struct socket_address src, struct socket_address dst, + unsigned char *payload, int payload_len +){ + fp_mac_addr_src = *ethernet_mac_addr(); + arp_cache_lookup_mac(&src.addr, &fp_mac_addr_dst); + fp_socket_src = dst; + fp_socket_dst = src; + sr_udp_sm->dsp0_port = (((uint32_t)dst.port) << 16) | src.port; + dsp0_dst_port = src.port; + printf("Storing for dsp0 path:\n"); + printf(" source mac addr: "); + print_mac_addr(&fp_mac_addr_src); newline(); + printf(" source ip addr: "); + print_ip_addr(&fp_socket_src.addr); newline(); + printf(" source udp port: %d\n", fp_socket_src.port); + printf(" destination mac addr: "); + print_mac_addr(&fp_mac_addr_dst); newline(); + printf(" destination ip addr: "); + print_ip_addr(&fp_socket_dst.addr); newline(); + printf(" destination udp port: %d\n", fp_socket_dst.port); + newline(); + + //setup network + setup_network(); + +} + +#define OTW_GPIO_BANK_TO_NUM(bank) \ + (((bank) == USRP2_DIR_RX)? (GPIO_RX_BANK) : (GPIO_TX_BANK)) + +static void handle_udp_ctrl_packet( + struct socket_address src, struct socket_address dst, + unsigned char *payload, int payload_len +){ + //printf("Got ctrl packet #words: %d\n", (int)payload_len); + const usrp2_ctrl_data_t *ctrl_data_in = (usrp2_ctrl_data_t *)payload; + uint32_t ctrl_data_in_id = ctrl_data_in->id; + + //ensure that the protocol versions match + if (payload_len >= sizeof(uint32_t) && ctrl_data_in->proto_ver != USRP2_FW_COMPAT_NUM){ + printf("!Error in control packet handler: Expected compatibility number %d, but got %d\n", + USRP2_FW_COMPAT_NUM, ctrl_data_in->proto_ver + ); + ctrl_data_in_id = USRP2_CTRL_ID_WAZZUP_BRO; + } + + //ensure that this is not a short packet + if (payload_len < sizeof(usrp2_ctrl_data_t)){ + printf("!Error in control packet handler: Expected payload length %d, but got %d\n", + (int)sizeof(usrp2_ctrl_data_t), payload_len + ); + ctrl_data_in_id = USRP2_CTRL_ID_HUH_WHAT; + } + + //setup the output data + usrp2_ctrl_data_t ctrl_data_out; + ctrl_data_out.proto_ver = USRP2_FW_COMPAT_NUM; + ctrl_data_out.id=USRP2_CTRL_ID_HUH_WHAT; + ctrl_data_out.seq=ctrl_data_in->seq; + + //handle the data based on the id + switch(ctrl_data_in_id){ + + /******************************************************************* + * Addressing + ******************************************************************/ + case USRP2_CTRL_ID_WAZZUP_BRO: + ctrl_data_out.id = USRP2_CTRL_ID_WAZZUP_DUDE; + memcpy(&ctrl_data_out.data.ip_addr, get_ip_addr(), sizeof(struct ip_addr)); + break; + + /******************************************************************* + * SPI + ******************************************************************/ + case USRP2_CTRL_ID_TRANSACT_ME_SOME_SPI_BRO:{ + //transact + uint32_t result = spi_transact( + (ctrl_data_in->data.spi_args.readback == 0)? SPI_TXONLY : SPI_TXRX, + ctrl_data_in->data.spi_args.dev, //which device + ctrl_data_in->data.spi_args.data, //32 bit data + ctrl_data_in->data.spi_args.num_bits, //length in bits + (ctrl_data_in->data.spi_args.mosi_edge == USRP2_CLK_EDGE_RISE)? SPIF_PUSH_FALL : SPIF_PUSH_RISE | + (ctrl_data_in->data.spi_args.miso_edge == USRP2_CLK_EDGE_RISE)? SPIF_LATCH_RISE : SPIF_LATCH_FALL + ); + + //load output + ctrl_data_out.data.spi_args.data = result; + ctrl_data_out.id = USRP2_CTRL_ID_OMG_TRANSACTED_SPI_DUDE; + } + break; + + /******************************************************************* + * I2C + ******************************************************************/ + case USRP2_CTRL_ID_DO_AN_I2C_READ_FOR_ME_BRO:{ + uint8_t num_bytes = ctrl_data_in->data.i2c_args.bytes; + i2c_read( + ctrl_data_in->data.i2c_args.addr, + ctrl_data_out.data.i2c_args.data, + num_bytes + ); + ctrl_data_out.id = USRP2_CTRL_ID_HERES_THE_I2C_DATA_DUDE; + ctrl_data_out.data.i2c_args.bytes = num_bytes; + } + break; + + case USRP2_CTRL_ID_WRITE_THESE_I2C_VALUES_BRO:{ + uint8_t num_bytes = ctrl_data_in->data.i2c_args.bytes; + i2c_write( + ctrl_data_in->data.i2c_args.addr, + ctrl_data_in->data.i2c_args.data, + num_bytes + ); + ctrl_data_out.id = USRP2_CTRL_ID_COOL_IM_DONE_I2C_WRITE_DUDE; + ctrl_data_out.data.i2c_args.bytes = num_bytes; + } + break; + + /******************************************************************* + * Peek and Poke Register + ******************************************************************/ + case USRP2_CTRL_ID_POKE_THIS_REGISTER_FOR_ME_BRO: + switch(ctrl_data_in->data.poke_args.num_bytes){ + case sizeof(uint32_t): + *((uint32_t *) ctrl_data_in->data.poke_args.addr) = (uint32_t)ctrl_data_in->data.poke_args.data; + break; + + case sizeof(uint16_t): + *((uint16_t *) ctrl_data_in->data.poke_args.addr) = (uint16_t)ctrl_data_in->data.poke_args.data; + break; + + case sizeof(uint8_t): + *((uint8_t *) ctrl_data_in->data.poke_args.addr) = (uint8_t)ctrl_data_in->data.poke_args.data; + break; + + } + ctrl_data_out.id = USRP2_CTRL_ID_OMG_POKED_REGISTER_SO_BAD_DUDE; + break; + + case USRP2_CTRL_ID_PEEK_AT_THIS_REGISTER_FOR_ME_BRO: + switch(ctrl_data_in->data.poke_args.num_bytes){ + case sizeof(uint32_t): + ctrl_data_out.data.poke_args.data = *((uint32_t *) ctrl_data_in->data.poke_args.addr); + break; + + case sizeof(uint16_t): + ctrl_data_out.data.poke_args.data = *((uint16_t *) ctrl_data_in->data.poke_args.addr); + break; + + case sizeof(uint8_t): + ctrl_data_out.data.poke_args.data = *((uint8_t *) ctrl_data_in->data.poke_args.addr); + break; + + } + ctrl_data_out.id = USRP2_CTRL_ID_WOAH_I_DEFINITELY_PEEKED_IT_DUDE; + break; + + /******************************************************************* + * UART Control + ******************************************************************/ + case USRP2_CTRL_ID_SO_LIKE_CAN_YOU_READ_THIS_UART_BRO:{ + //executes a readline()-style read, up to num_bytes long, up to and including newline + int num_bytes = ctrl_data_in->data.uart_args.bytes; + if(num_bytes > 20) num_bytes = 20; + num_bytes = fngets_noblock(ctrl_data_in->data.uart_args.dev, (char *) ctrl_data_out.data.uart_args.data, num_bytes); + ctrl_data_out.id = USRP2_CTRL_ID_I_HELLA_READ_THAT_UART_DUDE; + ctrl_data_out.data.uart_args.bytes = num_bytes; + break; + } + + case USRP2_CTRL_ID_HEY_WRITE_THIS_UART_FOR_ME_BRO:{ + int num_bytes = ctrl_data_in->data.uart_args.bytes; + if(num_bytes > 20) num_bytes = 20; + //before we write to the UART, we flush the receive buffer + //this assumes that we're interested in the reply + hal_uart_rx_flush(ctrl_data_in->data.uart_args.dev); + fnputstr(ctrl_data_in->data.uart_args.dev, (char *) ctrl_data_in->data.uart_args.data, num_bytes); + ctrl_data_out.id = USRP2_CTRL_ID_MAN_I_TOTALLY_WROTE_THAT_UART_DUDE; + ctrl_data_out.data.uart_args.bytes = num_bytes; + break; + } + + /******************************************************************* + * Echo test + ******************************************************************/ + case USRP2_CTRL_ID_HOLLER_AT_ME_BRO: + ctrl_data_out.data.echo_args.len = payload_len; + ctrl_data_out.id = USRP2_CTRL_ID_HOLLER_BACK_DUDE; + send_udp_pkt(USRP2_UDP_CTRL_PORT, src, &ctrl_data_out, ctrl_data_in->data.echo_args.len); + return; + + default: + ctrl_data_out.id = USRP2_CTRL_ID_HUH_WHAT; + } + send_udp_pkt(USRP2_UDP_CTRL_PORT, src, &ctrl_data_out, sizeof(ctrl_data_out)); +} + +static void handle_inp_packet(uint32_t *buff, size_t num_lines){ + + //test if its an ip recovery packet + typedef struct{ + padded_eth_hdr_t eth_hdr; + char code[4]; + union { + struct ip_addr ip_addr; + } data; + }recovery_packet_t; + recovery_packet_t *recovery_packet = (recovery_packet_t *)buff; + if (recovery_packet->eth_hdr.ethertype == 0xbeee && strncmp(recovery_packet->code, "addr", 4) == 0){ + printf("Got ip recovery packet: "); print_ip_addr(&recovery_packet->data.ip_addr); newline(); + set_ip_addr(&recovery_packet->data.ip_addr); + return; + } + + //pass it to the slow-path handler + handle_eth_packet(buff, num_lines); +} + + +//------------------------------------------------------------------ + +/* + * Called when eth phy state changes (w/ interrupts disabled) + */ +void link_changed_callback(int speed){ + printf("\neth link changed: speed = %d\n", speed); + if (speed != 0){ + hal_set_leds(LED_RJ45, LED_RJ45); + pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_MASTER); + send_gratuitous_arp(); + } + else{ + hal_set_leds(0x0, LED_RJ45); + pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_SLAVE); + } +} + +static void setup_network(void){ + + //setup ethernet header machine + sr_udp_sm->eth_hdr.mac_dst_0_1 = (fp_mac_addr_dst.addr[0] << 8) | fp_mac_addr_dst.addr[1]; + sr_udp_sm->eth_hdr.mac_dst_2_3 = (fp_mac_addr_dst.addr[2] << 8) | fp_mac_addr_dst.addr[3]; + sr_udp_sm->eth_hdr.mac_dst_4_5 = (fp_mac_addr_dst.addr[4] << 8) | fp_mac_addr_dst.addr[5]; + sr_udp_sm->eth_hdr.mac_src_0_1 = (fp_mac_addr_src.addr[0] << 8) | fp_mac_addr_src.addr[1]; + sr_udp_sm->eth_hdr.mac_src_2_3 = (fp_mac_addr_src.addr[2] << 8) | fp_mac_addr_src.addr[3]; + sr_udp_sm->eth_hdr.mac_src_4_5 = (fp_mac_addr_src.addr[4] << 8) | fp_mac_addr_src.addr[5]; + sr_udp_sm->eth_hdr.ether_type = ETHERTYPE_IPV4; + + //setup ip header machine + unsigned int chksum = 0; + sr_udp_sm->ip_hdr.ver_ihl_tos = CHKSUM(0x4500, &chksum); // IPV4, 5 words of header (20 bytes), TOS=0 + sr_udp_sm->ip_hdr.total_length = UDP_SM_INS_IP_LEN; // Don't checksum this line in SW + sr_udp_sm->ip_hdr.identification = CHKSUM(0x0000, &chksum); // ID + sr_udp_sm->ip_hdr.flags_frag_off = CHKSUM(0x4000, &chksum); // don't fragment + sr_udp_sm->ip_hdr.ttl_proto = CHKSUM(0x2011, &chksum); // TTL=32, protocol = UDP (17 decimal) + //sr_udp_sm->ip_hdr.checksum .... filled in below + uint32_t src_ip_addr = fp_socket_src.addr.addr; + uint32_t dst_ip_addr = fp_socket_dst.addr.addr; + sr_udp_sm->ip_hdr.src_addr_high = CHKSUM(src_ip_addr >> 16, &chksum); // IP src high + sr_udp_sm->ip_hdr.src_addr_low = CHKSUM(src_ip_addr & 0xffff, &chksum); // IP src low + sr_udp_sm->ip_hdr.dst_addr_high = CHKSUM(dst_ip_addr >> 16, &chksum); // IP dst high + sr_udp_sm->ip_hdr.dst_addr_low = CHKSUM(dst_ip_addr & 0xffff, &chksum); // IP dst low + sr_udp_sm->ip_hdr.checksum = UDP_SM_INS_IP_HDR_CHKSUM | (chksum & 0xffff); + + //setup the udp header machine + sr_udp_sm->udp_hdr.src_port = UDP_SM_INS_UDP_SRC_PORT; + sr_udp_sm->udp_hdr.dst_port = UDP_SM_INS_UDP_DST_PORT; + sr_udp_sm->udp_hdr.length = UDP_SM_INS_UDP_LEN; + sr_udp_sm->udp_hdr.checksum = UDP_SM_LAST_WORD; // zero UDP checksum +} + +int +main(void) +{ + u2_init(); + + putstr("\nTxRx-UHD-ZPU\n"); + print_mac_addr(ethernet_mac_addr()); newline(); + print_ip_addr(get_ip_addr()); newline(); + printf("FPGA compatibility number: %d\n", USRP2_FPGA_COMPAT_NUM); + printf("Firmware compatibility number: %d\n", USRP2_FW_COMPAT_NUM); + + //1) register the addresses into the network stack + register_addrs(ethernet_mac_addr(), get_ip_addr()); + pkt_ctrl_program_inspector(get_ip_addr(), USRP2_UDP_DSP0_PORT); + + //2) register callbacks for udp ports we service + init_udp_listeners(); + register_udp_listener(USRP2_UDP_CTRL_PORT, handle_udp_ctrl_packet); + register_udp_listener(USRP2_UDP_DSP0_PORT, handle_udp_dsp0_packet); + register_udp_listener(USRP2_UDP_ERR0_PORT, handle_udp_err0_packet); + register_udp_listener(USRP2_UDP_DSP1_PORT, handle_udp_dsp1_packet); +#ifdef USRP2P + register_udp_listener(USRP2_UDP_UPDATE_PORT, handle_udp_fw_update_packet); +#endif + + //3) set the routing mode to slave to set defaults + pkt_ctrl_set_routing_mode(PKT_CTRL_ROUTING_MODE_SLAVE); + + //4) setup ethernet hardware to bring the link up + ethernet_register_link_changed_callback(link_changed_callback); + ethernet_init(); + + while(true){ + + size_t num_lines; + void *buff = pkt_ctrl_claim_incoming_buffer(&num_lines); + if (buff != NULL){ + handle_inp_packet((uint32_t *)buff, num_lines); + pkt_ctrl_release_incoming_buffer(); + } + + pic_interrupt_handler(); + int pending = pic_regs->pending; // poll for under or overrun + + if (pending & PIC_UNDERRUN_INT){ + pic_regs->pending = PIC_UNDERRUN_INT; // clear interrupt + putchar('U'); + } + + if (pending & PIC_OVERRUN_INT){ + pic_regs->pending = PIC_OVERRUN_INT; // clear interrupt + putchar('O'); + } + } +} |