mirror of
https://github.com/logicog/RTLPlayground.git
synced 2026-08-30 14:52:51 +08:00
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/*
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* This is a driver implementation for the Spanning Tree Protocol features for the RTL837x platform
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* This code is in the Public Domain
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*/
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// #define REGDBG
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// #define DEBUG
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#include <stdint.h>
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#include "rtl837x_common.h"
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#include "rtl837x_sfr.h"
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#include "rtl837x_regs.h"
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#include "rtl837x_igmp.h"
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#include "uip.h"
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extern __xdata uint8_t minPort;
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extern __xdata uint8_t maxPort;
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extern __xdata uint8_t nSFPPorts;
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extern __xdata uint8_t cpuPort;
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extern __xdata uint8_t isRTL8373;
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extern __code struct uip_eth_addr uip_ethaddr;
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extern __xdata uint8_t uip_buf[UIP_CONF_BUFFER_SIZE+2];
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// 8899 04 0000 20 0004
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struct rtl_tag {
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uint16_t tag;
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uint8_t version;
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uint16_t dummy;
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uint8_t flag;
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uint16_t pmask;
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};
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struct stp_pkt {
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uint8_t stp_addr[6];
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uint8_t src_addr[6];
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struct rtl_tag rtl_tag;
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uint16_t msg_len;
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uint8_t dsap;
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uint8_t ssap;
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uint8_t ctrl;
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uint16_t proto;
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uint8_t version;
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uint8_t root_prio;
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uint8_t root_ext;
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uint8_t root_mac[8];
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uint8_t bridge_prio;
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uint8_t bridge_ext;
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uint8_t bridge_mac[8];
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uint8_t port_prio;
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uint8_t port_id;
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uint16_t age;
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uint16_t age_max;
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uint16_t fwd_delay;
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};
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#define STP_O ((__xdata struct stp_pkt *)&uip_buf[RTL_TAG_SIZE + VLAN_TAG_SIZE])
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void stp_cnf_send(uint8_t port) __banked
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{
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STP_O->stp_addr[0] = 0x01; STP_O->stp_addr[1] = 0x80; STP_O->stp_addr[2] = 0xc2;
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STP_O->stp_addr[3] = STP_O->stp_addr[4] = STP_O->stp_addr[5] = 0x00;
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STP_O->rtl_tag.tag = HTONS(0x8899);
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STP_O->rtl_tag.version = 0x04;
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STP_O->rtl_tag.dummy = 0x0000;
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STP_O->rtl_tag.flag = 0x20; // WHY ???
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STP_O->rtl_tag.pmask = HTONS(((uint16_t)1) << port);
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STP_O->msg_len = HTONS(0x27);
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STP_O->dsap = 0x42;
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STP_O->ssap = 0x42;
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STP_O->ctrl = 0x03;
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STP_O->proto = 0x0000;
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STP_O->version = 0;
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memcpyc(STP_O->src_addr, uip_ethaddr.addr, 6);
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memcpyc(STP_O->root_mac, uip_ethaddr.addr, 6); // For now we are the root-bridge
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memcpyc(STP_O->bridge_mac, uip_ethaddr.addr, 6);
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STP_O->root_prio = 0x80;
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STP_O->root_ext = 0x00;
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STP_O->bridge_prio = 0x80;
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STP_O->bridge_ext = 0x00;
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STP_O->port_prio = 0x80;
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STP_O->port_id = port;
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STP_O->age = 0x00;
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STP_O->age_max = 0x20;
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STP_O->fwd_delay = 0x0f;
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uip_len = 0x27 + sizeof(struct rtl_tag);
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}
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