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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [drivers/] [eth.c] - Blame information for rev 314

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#include "board.h"
#if OC_LAN==1
 
#include "common.h"
#include "support.h"
#include "uart.h"
#include "eth.h"
#include "int.h"
#include "spr-defs.h"
 
//#define PRINT_PACKETS
//#define ETHPHY_10MBPS
 
extern int printf (const char *fmt, ...);
extern void lolev_ie(void);
extern void lolev_idis(void);
 
int tx_next;  /* Next buffer to be given to the user */
int tx_last;  /* Next buffer to be checked if packet sent */
int tx_full;
int rx_next;  /* Next buffer to be checked for new packet and given to the user */
void (*receive)(volatile unsigned char *add, int len); /* Pointer to function to be called
                                        when frame is received */
int eth_monitor_enabled;
 
//unsigned long eth_data[((ETH_TXBD_NUM + ETH_RXBD_NUM) * ETH_MAXBUF_LEN)/4] = {0};
//#undef ETH_DATA_BASE
//#define ETH_DATA_BASE ((unsigned long)eth_data)
 
 
static void
print_packet(unsigned long add, int len)
{
  int i;
 
  printf("ipacket: add = %lx len = %d\n", add, len);
  for(i = 0; i < len; i++) {
      if(!(i % 16)) printf("\n");
      else if(!(i % 8)) printf(" "); // space here, so output is like wireshark
      printf(" %.2x", *(((unsigned char *)add) + i));
  }
  printf("\n");
}
 
void init_tx_bd_pool(void)
{
  eth_bd  *bd;
  int i;
 
  bd = (eth_bd *)ETH_BD_BASE;
 
  for(i = 0; i < ETH_TXBD_NUM; i++) {
    /* Set Tx BD status */
    bd[i].len_status = 0 << 16 | ETH_TX_BD_PAD | ETH_TX_BD_CRC | ETH_RX_BD_IRQ;
 
    /* Initialize Tx buffer pointer */
    bd[i].addr = ETH_DATA_BASE + (i * ETH_MAXBUF_LEN);
  }
 
  bd[i-1].len_status |= ETH_TX_BD_WRAP; // Last Tx BD - Wrap
}
 
void init_rx_bd_pool(void)
{
  eth_bd  *bd;
  int i;
 
  bd = (eth_bd *)ETH_BD_BASE + ETH_TXBD_NUM;
 
  for(i = 0; i < ETH_RXBD_NUM; i++){
 
    /* Set Rx BD status */
    bd[i].len_status = 0 << 16 | ETH_RX_BD_EMPTY | ETH_RX_BD_IRQ;
 
    /* Initialize Rx buffer pointer */
    bd[i].addr = ETH_DATA_BASE + ((ETH_TXBD_NUM + i) * ETH_MAXBUF_LEN);
  }
 
  bd[i-1].len_status |= ETH_RX_BD_WRAP; // Last Rx BD - Wrap
}
 
 
void eth_traffic_monitor(void)
{
 volatile oeth_regs *regs;
  regs = (oeth_regs *)(ETH_REG_BASE);
 
  uint  int_events;
  int serviced;
  int i;
 
  serviced = 0;
 
  /* Get the interrupt events that caused us to be here.
   */
  int_events = regs->int_src;
  regs->int_src = int_events;
 
  printf("\n=tx_ | %x | %x | %x | %x | %x | %x | %x | %x\n",
         ((oeth_bd *)(ETH_BD_BASE))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+8))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+16))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+24))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+32))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+40))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+48))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+56))->len_status);
 
  printf("=rx_ | %x | %x | %x | %x | %x | %x | %x | %x\n",
         ((oeth_bd *)(ETH_BD_BASE+64))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+8))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+16))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+24))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+32))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+40))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+48))->len_status,
         ((oeth_bd *)(ETH_BD_BASE+64+56))->len_status);
 
  printf("=int | txb %d | txe %d | rxb %d | rxe %d | busy %d\n",
         (int_events & ETH_INT_TXB) > 0,
         (int_events & ETH_INT_TXE) > 0,
         (int_events & ETH_INT_RXF) > 0,
         (int_events & ETH_INT_RXE) > 0,
         (int_events & ETH_INT_BUSY) > 0);
 
 
  /* Check for receive busy, i.e. packets coming but no place to
   * put them.
   */
  if (int_events & ETH_INT_BUSY ) {
    serviced |= 0x4;
    printf("eth: busy!");
  }
 
  /* Handle receive event
   */
  if (int_events & (ETH_INT_RXF | ETH_INT_RXE)) {
    serviced |= 0x1;
    volatile oeth_bd *rx_bdp;
    rx_bdp = ((oeth_bd *)ETH_BD_BASE) + ETH_TXBD_NUM;
    /* Find RX buffers marked as having received data */
    for(i = 0; i < ETH_RXBD_NUM; i++)
      {
        if(!(rx_bdp[i].len_status & ETH_RX_BD_EMPTY))
          {
            print_packet(rx_bdp[i].addr, rx_bdp[i].len_status >> 16);
            rx_bdp[i].len_status &= ~ETH_RX_BD_STATS;  /* Clear stats */
            rx_bdp[i].len_status |= ETH_RX_BD_EMPTY; /* Mark RX BD as empty */
          }
      }
  }
 
  /* Handle transmit event
   */
  if (int_events & (ETH_INT_TXB | ETH_INT_TXE)) {
    serviced |= 0x2;
    volatile oeth_bd *tx_bd;
    tx_bd = (volatile oeth_bd *)ETH_BD_BASE; /* Search from beginning*/
    for(i = 0; i < ETH_TXBD_NUM; i++)
      {
        /* Looking for buffer NOT ready for transmit */
        if((!(tx_bd[i].len_status & (ETH_TX_BD_READY))) &&
           (tx_bd[i].len_status & (ETH_TX_BD_IRQ)))
          {
            print_packet(tx_bd[i].addr, (tx_bd[i].len_status >> 16));
            tx_bd[i].len_status &= ~ETH_TX_BD_IRQ;
          }
      }
 
  }
 
  if (serviced == 0)
    printf("\neth interrupt called but nothing serviced\n");
 
}
 
 
/* Ethernet interrupt handler */
void eth_int (void)
{
  printf("eth-int!\n");
  if (eth_monitor_enabled)
    eth_traffic_monitor();
  //REG32(ETH_REG_BASE + ETH_INT) = 0xffffffff;
 
}
 
void eth_reset_phy(void)
{
  /* Reset Eth PHY via MDIO*/
  printf("Resetting PHY, waiting for link");
  REG32(ETH_REG_BASE + ETH_MIIADDRESS) = (0<<8)|(ETH_MDIOPHYADDR&0xff);
  REG32(ETH_REG_BASE + ETH_MIITX_DATA) = 0x8000; // Bit 15 = 1: RESET
  REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_WCTRLDATA;
  while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);
 
  sleep(100);
 
  while(1){
    printf(".");
    REG32(ETH_REG_BASE + ETH_MIIADDRESS) = (0<<8)|(ETH_MDIOPHYADDR&0xff);
    REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_RSTAT;
    while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);
    if(!(REG32(ETH_REG_BASE + ETH_MIIRX_DATA) & 0x8000)) // If reset clear
      break;
  }
}
 
 
void eth_init (void (*rec)(volatile unsigned char *, int))
{
  /* Reset ethernet core */
  REG32(ETH_REG_BASE + ETH_MODER) = ETH_MODER_RST;    /* Reset ON */
  REG32(ETH_REG_BASE + ETH_MODER) &= ~ETH_MODER_RST;  /* Reset OFF */
 
  /* Setting TX BD number */
  REG32(ETH_REG_BASE + ETH_TX_BD_NUM) = ETH_TXBD_NUM;
 
#ifdef ETHPHY_10MBPS
  // Set PHY to 10 Mbps full duplex
  REG32(ETH_REG_BASE + ETH_MIIADDRESS) = 0<<8;
  REG32(ETH_REG_BASE + ETH_MIITX_DATA) = 0x0100;
  REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_WCTRLDATA;
  while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);
 
  while(1){
    REG32(ETH_REG_BASE + ETH_MIIADDRESS) = 1<<8;
    REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_RSTAT;
    while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);
    if(REG32(ETH_REG_BASE + ETH_MIIRX_DATA) & 0x04)
      break;
  }
 
#endif
 
  /* Set min/max packet length */
  REG32(ETH_REG_BASE + ETH_PACKETLEN) = 0x00400600;
 
  /* Set IPGT register to recomended value */
  REG32(ETH_REG_BASE + ETH_IPGT) =  0x00000012;
 
  /* Set IPGR1 register to recomended value */
  REG32(ETH_REG_BASE + ETH_IPGR1) =  0x0000000c;
 
  /* Set IPGR2 register to recomended value */
  REG32(ETH_REG_BASE + ETH_IPGR2) =  0x00000012;
 
  /* Set COLLCONF register to recomended value */
  REG32(ETH_REG_BASE + ETH_COLLCONF) =  0x000f003f;
 
#if 0
  REG32(ETH_REG_BASE + ETH_CTRLMODER) = ETH_CTRLMODER_TXFLOW | ETH_CTRLMODER_RXFLOW;
#else
  REG32(ETH_REG_BASE + ETH_CTRLMODER) = 0;
#endif
 
  /* Initialize RX and TX buffer descriptors */
  init_rx_bd_pool();
  init_tx_bd_pool();
 
  /* Initialize tx pointers */
  tx_next = 0;
  tx_last = 0;
  tx_full = 0;
 
  /* Initialize rx pointers */
  rx_next = 0;
  receive = rec;
 
  /* Set local MAC address */
  REG32(ETH_REG_BASE + ETH_MAC_ADDR1) = ETH_MACADDR0 << 8 |
            ETH_MACADDR1;
  REG32(ETH_REG_BASE + ETH_MAC_ADDR0) = ETH_MACADDR2 << 24 |
            ETH_MACADDR3 << 16 |
            ETH_MACADDR4 << 8 |
            ETH_MACADDR5;
 
  /* Clear all pending interrupts */
  REG32(ETH_REG_BASE + ETH_INT) = 0xffffffff;
 
  /* Promisc, IFG, CRCEn */
  REG32(ETH_REG_BASE + ETH_MODER) |= ETH_MODER_PAD | ETH_MODER_IFG | ETH_MODER_CRCEN;
 
  /* Enable interrupt sources */
#if 0
  REG32(ETH_REG_BASE + ETH_INT_MASK)= ETH_INT_MASK_TXB        |
                   ETH_INT_MASK_TXE        |
                   ETH_INT_MASK_RXF        |
                   ETH_INT_MASK_RXE        |
                   ETH_INT_MASK_BUSY       |
                   ETH_INT_MASK_TXC        |
                   ETH_INT_MASK_RXC;
  eth_monitor_enabled = 1;
#else
  REG32(ETH_REG_BASE + ETH_INT_MASK) = 0x00000000;
  printf("eth_init: monitor disabled at startup\n");
  eth_monitor_enabled = 0;
#endif
 
  /* Enable receiver and transmiter */
  REG32(ETH_REG_BASE + ETH_MODER) |= ETH_MODER_RXEN | ETH_MODER_TXEN;
 
  /* Register interrupt handler */
  int_add (ETH_IRQ, eth_int);
}
 
/* Returns pointer to next free buffer; NULL if none available */
void *eth_get_tx_buf ()
{
  eth_bd  *bd;
  unsigned long add;
 
  if(tx_full)
    return (void *)0;
 
  bd = (eth_bd *)ETH_BD_BASE;
 
  if(bd[tx_next].len_status & ETH_TX_BD_READY)
    return (void *)0;
 
  add = bd[tx_next].addr;
 
  tx_next = (tx_next + 1) & ETH_TXBD_NUM_MASK;
 
  if(tx_next == tx_last)
      tx_full = 1;
 
  return (void *)add;
}
 
/* Send a packet at address */
void eth_send (void *buf, unsigned long len)
{
    eth_bd  *bd;
    int i;
 
#ifdef PRINT_PACKETS  
  printf("transmitted packet:\t");
  print_packet(buf, len);
#endif
 
  bd = (eth_bd *)ETH_BD_BASE;
 
  bd[tx_last].addr = (unsigned long)buf;
 
 retry_eth_send:
  bd[tx_last].len_status &= 0x0000ffff & ~ETH_TX_BD_STATS;
  if (eth_monitor_enabled) // enable IRQ when sending
    bd[tx_last].len_status |= ETH_TX_BD_IRQ;
  bd[tx_last].len_status |= len << 16 | ETH_TX_BD_READY;
 
  /*
  while (bd[tx_last].len_status & ETH_TX_BD_READY);
  printf("packet tx\n");
  // Check it was sent OK
  if ( bd[tx_last].len_status & 0x2)
    {
      printf("eth_send: carrier sense lost (txbd: 0x%x), deferred, retrying\n",
             bd[tx_last].len_status);
      sleep(1000);
      goto retry_eth_send;
    }
  */
  tx_last = (tx_last + 1) & ETH_TXBD_NUM_MASK;
  tx_full = 0;
 
}
 
/* Waits for packet and pass it to the upper layers */
unsigned long eth_rx (void)
{
  eth_bd  *bd;
  unsigned long len = 0;
  int i;
 
  bd = (eth_bd *)ETH_BD_BASE + ETH_TXBD_NUM;
 
  while(1) {
 
    int bad = 0;
 
    if(bd[rx_next].len_status & ETH_RX_BD_EMPTY)
      return len;
 
    if(bd[rx_next].len_status & ETH_RX_BD_OVERRUN) {
      printf("eth rx: ETH_RX_BD_OVERRUN\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_INVSIMB) {
      printf("eth rx: ETH_RX_BD_INVSIMB\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_DRIBBLE) {
      printf("eth rx: ETH_RX_BD_DRIBBLE\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_TOOLONG) {
      printf("eth rx: ETH_RX_BD_TOOLONG\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_SHORT) {
      printf("eth rx: ETH_RX_BD_SHORT\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_CRCERR) {
      printf("eth rx: ETH_RX_BD_CRCERR\n");
      bad = 1;
    }
    if(bd[rx_next].len_status & ETH_RX_BD_LATECOL) {
      printf("eth rx: ETH_RX_BD_LATECOL\n");
      bad = 1;
    }
 
    if(!bad) {
#ifdef PRINT_PACKETS
      printf("received packet:\t");
      print_packet(bd[rx_next].addr, bd[rx_next].len_status >> 16);
#endif
 
      receive((void *)bd[rx_next].addr, bd[rx_next].len_status >> 16);
      len += bd[rx_next].len_status >> 16;
    }
 
    bd[rx_next].len_status &= ~ETH_RX_BD_STATS;
    bd[rx_next].len_status |= ETH_RX_BD_EMPTY;
 
    rx_next = (rx_next + 1) & ETH_RXBD_NUM_MASK;
  }
}
 
void eth_int_enable(void)
{
  REG32(ETH_REG_BASE + ETH_INT_MASK) =  ETH_INT_MASK_TXB        |
                                        ETH_INT_MASK_TXE        |
                                        ETH_INT_MASK_RXF        |
                                        ETH_INT_MASK_RXE        |
                                        ETH_INT_MASK_BUSY       |
                                        ETH_INT_MASK_TXC        |
                                        ETH_INT_MASK_RXC;
}
 
void eth_int_disable(void)
{
  REG32(ETH_REG_BASE + ETH_INT_MASK) = 0;
}
 
void eth_halt(void)
{
  /* Disable receiver and transmiter */
  REG32(ETH_REG_BASE + ETH_MODER) &= ~(ETH_MODER_RXEN | ETH_MODER_TXEN);
}
 
 
void eth_toggle_traffic_mon(void)
{
  if (!eth_monitor_enabled)
    {
      printf("eth_toggle_traffic_mon: traffic monitor ENABLED\n");
      printf("eth_toggle_traffic_mon: Warning - do not enable during tftp boot!\n");
      eth_monitor_enabled = 1;
      eth_int_enable();
    }
  else
    {
      eth_int_disable();
      eth_monitor_enabled = 0;
      printf("eth_toggle_traffic_mon: traffic monitor DISABLED\n");
 
 
    }
 
}
#endif

Line No.	Rev	Author	Line
1	2	marcus.erl	`#include "board.h"`
2			`#if OC_LAN==1`
3
4			`#include "common.h"`
5			`#include "support.h"`
6			`#include "uart.h"`
7			`#include "eth.h"`
8			`#include "int.h"`
9	246	julius	`#include "spr-defs.h"`
10	2	marcus.erl
11	140	julius	`//#define PRINT_PACKETS`
12			`//#define ETHPHY_10MBPS`
13
14	2	marcus.erl	`extern int printf (const char *fmt, ...);`
15			`extern void lolev_ie(void);`
16			`extern void lolev_idis(void);`
17
18			`int tx_next; /* Next buffer to be given to the user */`
19			`int tx_last; /* Next buffer to be checked if packet sent */`
20			`int tx_full;`
21			`int rx_next; /* Next buffer to be checked for new packet and given to the user */`
22			`void (receive)(volatile unsigned char add, int len); /* Pointer to function to be called`
23			`when frame is received */`
24	140	julius	`int eth_monitor_enabled;`
25	2	marcus.erl
26	140	julius	`//unsigned long eth_data[((ETH_TXBD_NUM + ETH_RXBD_NUM) * ETH_MAXBUF_LEN)/4] = {0};`
27			`//#undef ETH_DATA_BASE`
28			`//#define ETH_DATA_BASE ((unsigned long)eth_data)`
29	2	marcus.erl
30	140	julius
31	2	marcus.erl	`static void`
32			`print_packet(unsigned long add, int len)`
33			`{`
34			`int i;`
35
36			`printf("ipacket: add = %lx len = %d\n", add, len);`
37			`for(i = 0; i < len; i++) {`
38	140	julius	`if(!(i % 16)) printf("\n");`
39			`else if(!(i % 8)) printf(" "); // space here, so output is like wireshark`
40	2	marcus.erl	`printf(" %.2x", (((unsigned char )add) + i));`
41			`}`
42			`printf("\n");`
43			`}`
44
45			`void init_tx_bd_pool(void)`
46			`{`
47			`eth_bd *bd;`
48			`int i;`
49
50			`bd = (eth_bd *)ETH_BD_BASE;`
51
52			`for(i = 0; i < ETH_TXBD_NUM; i++) {`
53			`/* Set Tx BD status */`
54			`bd[i].len_status = 0 << 16 \| ETH_TX_BD_PAD \| ETH_TX_BD_CRC \| ETH_RX_BD_IRQ;`
55
56			`/* Initialize Tx buffer pointer */`
57			`bd[i].addr = ETH_DATA_BASE + (i * ETH_MAXBUF_LEN);`
58			`}`
59
60			`bd[i-1].len_status \|= ETH_TX_BD_WRAP; // Last Tx BD - Wrap`
61			`}`
62
63			`void init_rx_bd_pool(void)`
64			`{`
65			`eth_bd *bd;`
66			`int i;`
67
68			`bd = (eth_bd *)ETH_BD_BASE + ETH_TXBD_NUM;`
69
70			`for(i = 0; i < ETH_RXBD_NUM; i++){`
71
72			`/* Set Rx BD status */`
73			`bd[i].len_status = 0 << 16 \| ETH_RX_BD_EMPTY \| ETH_RX_BD_IRQ;`
74
75			`/* Initialize Rx buffer pointer */`
76			`bd[i].addr = ETH_DATA_BASE + ((ETH_TXBD_NUM + i) * ETH_MAXBUF_LEN);`
77			`}`
78
79			`bd[i-1].len_status \|= ETH_RX_BD_WRAP; // Last Rx BD - Wrap`
80			`}`
81
82	140	julius
83			`void eth_traffic_monitor(void)`
84			`{`
85			`volatile oeth_regs *regs;`
86			`regs = (oeth_regs *)(ETH_REG_BASE);`
87
88			`uint int_events;`
89			`int serviced;`
90			`int i;`
91
92			`serviced = 0;`
93
94			`/* Get the interrupt events that caused us to be here.`
95			`*/`
96			`int_events = regs->int_src;`
97			`regs->int_src = int_events;`
98
99			`printf("\n=tx_ \| %x \| %x \| %x \| %x \| %x \| %x \| %x \| %x\n",`
100			`((oeth_bd *)(ETH_BD_BASE))->len_status,`
101			`((oeth_bd *)(ETH_BD_BASE+8))->len_status,`
102			`((oeth_bd *)(ETH_BD_BASE+16))->len_status,`
103			`((oeth_bd *)(ETH_BD_BASE+24))->len_status,`
104			`((oeth_bd *)(ETH_BD_BASE+32))->len_status,`
105			`((oeth_bd *)(ETH_BD_BASE+40))->len_status,`
106			`((oeth_bd *)(ETH_BD_BASE+48))->len_status,`
107			`((oeth_bd *)(ETH_BD_BASE+56))->len_status);`
108
109			`printf("=rx_ \| %x \| %x \| %x \| %x \| %x \| %x \| %x \| %x\n",`
110			`((oeth_bd *)(ETH_BD_BASE+64))->len_status,`
111			`((oeth_bd *)(ETH_BD_BASE+64+8))->len_status,`
112			`((oeth_bd *)(ETH_BD_BASE+64+16))->len_status,`
113			`((oeth_bd *)(ETH_BD_BASE+64+24))->len_status,`
114			`((oeth_bd *)(ETH_BD_BASE+64+32))->len_status,`
115			`((oeth_bd *)(ETH_BD_BASE+64+40))->len_status,`
116			`((oeth_bd *)(ETH_BD_BASE+64+48))->len_status,`
117			`((oeth_bd *)(ETH_BD_BASE+64+56))->len_status);`
118
119			`printf("=int \| txb %d \| txe %d \| rxb %d \| rxe %d \| busy %d\n",`
120			`(int_events & ETH_INT_TXB) > 0,`
121			`(int_events & ETH_INT_TXE) > 0,`
122			`(int_events & ETH_INT_RXF) > 0,`
123			`(int_events & ETH_INT_RXE) > 0,`
124			`(int_events & ETH_INT_BUSY) > 0);`
125
126
127			`/* Check for receive busy, i.e. packets coming but no place to`
128			`* put them.`
129			`*/`
130			`if (int_events & ETH_INT_BUSY ) {`
131			`serviced \|= 0x4;`
132			`printf("eth: busy!");`
133			`}`
134
135			`/* Handle receive event`
136			`*/`
137			`if (int_events & (ETH_INT_RXF \| ETH_INT_RXE)) {`
138			`serviced \|= 0x1;`
139			`volatile oeth_bd *rx_bdp;`
140			`rx_bdp = ((oeth_bd *)ETH_BD_BASE) + ETH_TXBD_NUM;`
141			`/* Find RX buffers marked as having received data */`
142			`for(i = 0; i < ETH_RXBD_NUM; i++)`
143			`{`
144			`if(!(rx_bdp[i].len_status & ETH_RX_BD_EMPTY))`
145			`{`
146			`print_packet(rx_bdp[i].addr, rx_bdp[i].len_status >> 16);`
147			`rx_bdp[i].len_status &= ~ETH_RX_BD_STATS; /* Clear stats */`
148			`rx_bdp[i].len_status \|= ETH_RX_BD_EMPTY; /* Mark RX BD as empty */`
149			`}`
150			`}`
151			`}`
152
153			`/* Handle transmit event`
154			`*/`
155			`if (int_events & (ETH_INT_TXB \| ETH_INT_TXE)) {`
156			`serviced \|= 0x2;`
157			`volatile oeth_bd *tx_bd;`
158			`tx_bd = (volatile oeth_bd )ETH_BD_BASE; / Search from beginning*/`
159			`for(i = 0; i < ETH_TXBD_NUM; i++)`
160			`{`
161			`/* Looking for buffer NOT ready for transmit */`
162			`if((!(tx_bd[i].len_status & (ETH_TX_BD_READY))) &&`
163			`(tx_bd[i].len_status & (ETH_TX_BD_IRQ)))`
164			`{`
165			`print_packet(tx_bd[i].addr, (tx_bd[i].len_status >> 16));`
166			`tx_bd[i].len_status &= ~ETH_TX_BD_IRQ;`
167			`}`
168			`}`
169
170			`}`
171
172			`if (serviced == 0)`
173			`printf("\neth interrupt called but nothing serviced\n");`
174
175			`}`
176
177
178	2	marcus.erl	`/* Ethernet interrupt handler */`
179			`void eth_int (void)`
180			`{`
181	140	julius	`printf("eth-int!\n");`
182			`if (eth_monitor_enabled)`
183			`eth_traffic_monitor();`
184			`//REG32(ETH_REG_BASE + ETH_INT) = 0xffffffff;`
185
186	2	marcus.erl	`}`
187
188	140	julius	`void eth_reset_phy(void)`
189			`{`
190			`/* Reset Eth PHY via MDIO*/`
191			`printf("Resetting PHY, waiting for link");`
192			`REG32(ETH_REG_BASE + ETH_MIIADDRESS) = (0<<8)\|(ETH_MDIOPHYADDR&0xff);`
193			`REG32(ETH_REG_BASE + ETH_MIITX_DATA) = 0x8000; // Bit 15 = 1: RESET`
194			`REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_WCTRLDATA;`
195			`while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);`
196
197			`sleep(100);`
198
199			`while(1){`
200			`printf(".");`
201			`REG32(ETH_REG_BASE + ETH_MIIADDRESS) = (0<<8)\|(ETH_MDIOPHYADDR&0xff);`
202			`REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_RSTAT;`
203			`while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);`
204			`if(!(REG32(ETH_REG_BASE + ETH_MIIRX_DATA) & 0x8000)) // If reset clear`
205			`break;`
206			`}`
207			`}`
208
209
210	2	marcus.erl	`void eth_init (void (rec)(volatile unsigned char , int))`
211			`{`
212			`/* Reset ethernet core */`
213			`REG32(ETH_REG_BASE + ETH_MODER) = ETH_MODER_RST; /* Reset ON */`
214			`REG32(ETH_REG_BASE + ETH_MODER) &= ~ETH_MODER_RST; /* Reset OFF */`
215
216			`/* Setting TX BD number */`
217			`REG32(ETH_REG_BASE + ETH_TX_BD_NUM) = ETH_TXBD_NUM;`
218	140	julius
219			`#ifdef ETHPHY_10MBPS`
220	2	marcus.erl	`// Set PHY to 10 Mbps full duplex`
221			`REG32(ETH_REG_BASE + ETH_MIIADDRESS) = 0<<8;`
222			`REG32(ETH_REG_BASE + ETH_MIITX_DATA) = 0x0100;`
223			`REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_WCTRLDATA;`
224			`while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);`
225
226			`while(1){`
227			`REG32(ETH_REG_BASE + ETH_MIIADDRESS) = 1<<8;`
228			`REG32(ETH_REG_BASE + ETH_MIICOMMAND) = ETH_MIICOMMAND_RSTAT;`
229			`while(REG32(ETH_REG_BASE + ETH_MIISTATUS) & ETH_MIISTATUS_BUSY);`
230			`if(REG32(ETH_REG_BASE + ETH_MIIRX_DATA) & 0x04)`
231			`break;`
232			`}`
233	140	julius
234			`#endif`
235	2	marcus.erl
236			`/* Set min/max packet length */`
237			`REG32(ETH_REG_BASE + ETH_PACKETLEN) = 0x00400600;`
238
239			`/* Set IPGT register to recomended value */`
240			`REG32(ETH_REG_BASE + ETH_IPGT) = 0x00000012;`
241
242			`/* Set IPGR1 register to recomended value */`
243			`REG32(ETH_REG_BASE + ETH_IPGR1) = 0x0000000c;`
244
245			`/* Set IPGR2 register to recomended value */`
246			`REG32(ETH_REG_BASE + ETH_IPGR2) = 0x00000012;`
247
248			`/* Set COLLCONF register to recomended value */`
249			`REG32(ETH_REG_BASE + ETH_COLLCONF) = 0x000f003f;`
250
251			`#if 0`
252	140	julius	`REG32(ETH_REG_BASE + ETH_CTRLMODER) = ETH_CTRLMODER_TXFLOW \| ETH_CTRLMODER_RXFLOW;`
253	2	marcus.erl	`#else`
254			`REG32(ETH_REG_BASE + ETH_CTRLMODER) = 0;`
255			`#endif`
256
257			`/* Initialize RX and TX buffer descriptors */`
258			`init_rx_bd_pool();`
259			`init_tx_bd_pool();`
260
261			`/* Initialize tx pointers */`
262			`tx_next = 0;`
263			`tx_last = 0;`
264			`tx_full = 0;`
265
266			`/* Initialize rx pointers */`
267			`rx_next = 0;`
268			`receive = rec;`
269
270			`/* Set local MAC address */`
271			`REG32(ETH_REG_BASE + ETH_MAC_ADDR1) = ETH_MACADDR0 << 8 \|`
272			`ETH_MACADDR1;`
273			`REG32(ETH_REG_BASE + ETH_MAC_ADDR0) = ETH_MACADDR2 << 24 \|`
274			`ETH_MACADDR3 << 16 \|`
275			`ETH_MACADDR4 << 8 \|`
276			`ETH_MACADDR5;`
277
278			`/* Clear all pending interrupts */`
279			`REG32(ETH_REG_BASE + ETH_INT) = 0xffffffff;`
280
281			`/* Promisc, IFG, CRCEn */`
282			`REG32(ETH_REG_BASE + ETH_MODER) \|= ETH_MODER_PAD \| ETH_MODER_IFG \| ETH_MODER_CRCEN;`
283
284			`/* Enable interrupt sources */`
285			`#if 0`
286	140	julius	`REG32(ETH_REG_BASE + ETH_INT_MASK)= ETH_INT_MASK_TXB \|`
287	2	marcus.erl	`ETH_INT_MASK_TXE \|`
288			`ETH_INT_MASK_RXF \|`
289			`ETH_INT_MASK_RXE \|`
290			`ETH_INT_MASK_BUSY \|`
291			`ETH_INT_MASK_TXC \|`
292			`ETH_INT_MASK_RXC;`
293	140	julius	`eth_monitor_enabled = 1;`
294	2	marcus.erl	`#else`
295			`REG32(ETH_REG_BASE + ETH_INT_MASK) = 0x00000000;`
296	140	julius	`printf("eth_init: monitor disabled at startup\n");`
297			`eth_monitor_enabled = 0;`
298	2	marcus.erl	`#endif`
299
300			`/* Enable receiver and transmiter */`
301			`REG32(ETH_REG_BASE + ETH_MODER) \|= ETH_MODER_RXEN \| ETH_MODER_TXEN;`
302
303			`/* Register interrupt handler */`
304			`int_add (ETH_IRQ, eth_int);`
305			`}`
306
307			`/* Returns pointer to next free buffer; NULL if none available */`
308			`void *eth_get_tx_buf ()`
309			`{`
310			`eth_bd *bd;`
311			`unsigned long add;`
312
313			`if(tx_full)`
314			`return (void *)0;`
315
316			`bd = (eth_bd *)ETH_BD_BASE;`
317
318			`if(bd[tx_next].len_status & ETH_TX_BD_READY)`
319			`return (void *)0;`
320
321			`add = bd[tx_next].addr;`
322
323			`tx_next = (tx_next + 1) & ETH_TXBD_NUM_MASK;`
324
325			`if(tx_next == tx_last)`
326	140	julius	`tx_full = 1;`
327	2	marcus.erl
328			`return (void *)add;`
329			`}`
330
331			`/* Send a packet at address */`
332			`void eth_send (void *buf, unsigned long len)`
333			`{`
334	140	julius	`eth_bd *bd;`
335	246	julius	`int i;`
336	2	marcus.erl
337	140	julius	`#ifdef PRINT_PACKETS`
338			`printf("transmitted packet:\t");`
339			`print_packet(buf, len);`
340			`#endif`
341
342	2	marcus.erl	`bd = (eth_bd *)ETH_BD_BASE;`
343
344			`bd[tx_last].addr = (unsigned long)buf;`
345	246	julius
346	140	julius	`retry_eth_send:`
347	2	marcus.erl	`bd[tx_last].len_status &= 0x0000ffff & ~ETH_TX_BD_STATS;`
348	140	julius	`if (eth_monitor_enabled) // enable IRQ when sending`
349			`bd[tx_last].len_status \|= ETH_TX_BD_IRQ;`
350	2	marcus.erl	`bd[tx_last].len_status \|= len << 16 \| ETH_TX_BD_READY;`
351
352	140	julius	`/*`
353			`while (bd[tx_last].len_status & ETH_TX_BD_READY);`
354			`printf("packet tx\n");`
355			`// Check it was sent OK`
356			`if ( bd[tx_last].len_status & 0x2)`
357			`{`
358			`printf("eth_send: carrier sense lost (txbd: 0x%x), deferred, retrying\n",`
359			`bd[tx_last].len_status);`
360			`sleep(1000);`
361			`goto retry_eth_send;`
362			`}`
363			`*/`
364	2	marcus.erl	`tx_last = (tx_last + 1) & ETH_TXBD_NUM_MASK;`
365			`tx_full = 0;`
366	140	julius
367	2	marcus.erl	`}`
368
369			`/* Waits for packet and pass it to the upper layers */`
370			`unsigned long eth_rx (void)`
371			`{`
372			`eth_bd *bd;`
373			`unsigned long len = 0;`
374	246	julius	`int i;`
375	2	marcus.erl
376			`bd = (eth_bd *)ETH_BD_BASE + ETH_TXBD_NUM;`
377	140	julius
378	2	marcus.erl	`while(1) {`
379
380			`int bad = 0;`
381
382			`if(bd[rx_next].len_status & ETH_RX_BD_EMPTY)`
383			`return len;`
384	246	julius
385	2	marcus.erl	`if(bd[rx_next].len_status & ETH_RX_BD_OVERRUN) {`
386			`printf("eth rx: ETH_RX_BD_OVERRUN\n");`
387			`bad = 1;`
388			`}`
389			`if(bd[rx_next].len_status & ETH_RX_BD_INVSIMB) {`
390			`printf("eth rx: ETH_RX_BD_INVSIMB\n");`
391			`bad = 1;`
392			`}`
393			`if(bd[rx_next].len_status & ETH_RX_BD_DRIBBLE) {`
394			`printf("eth rx: ETH_RX_BD_DRIBBLE\n");`
395			`bad = 1;`
396			`}`
397			`if(bd[rx_next].len_status & ETH_RX_BD_TOOLONG) {`
398			`printf("eth rx: ETH_RX_BD_TOOLONG\n");`
399			`bad = 1;`
400			`}`
401			`if(bd[rx_next].len_status & ETH_RX_BD_SHORT) {`
402			`printf("eth rx: ETH_RX_BD_SHORT\n");`
403			`bad = 1;`
404			`}`
405			`if(bd[rx_next].len_status & ETH_RX_BD_CRCERR) {`
406			`printf("eth rx: ETH_RX_BD_CRCERR\n");`
407			`bad = 1;`
408			`}`
409			`if(bd[rx_next].len_status & ETH_RX_BD_LATECOL) {`
410			`printf("eth rx: ETH_RX_BD_LATECOL\n");`
411			`bad = 1;`
412			`}`
413
414			`if(!bad) {`
415	140	julius	`#ifdef PRINT_PACKETS`
416			`printf("received packet:\t");`
417			`print_packet(bd[rx_next].addr, bd[rx_next].len_status >> 16);`
418			`#endif`
419	246	julius
420	2	marcus.erl	`receive((void *)bd[rx_next].addr, bd[rx_next].len_status >> 16);`
421			`len += bd[rx_next].len_status >> 16;`
422			`}`
423
424			`bd[rx_next].len_status &= ~ETH_RX_BD_STATS;`
425			`bd[rx_next].len_status \|= ETH_RX_BD_EMPTY;`
426
427			`rx_next = (rx_next + 1) & ETH_RXBD_NUM_MASK;`
428			`}`
429			`}`
430
431			`void eth_int_enable(void)`
432			`{`
433			`REG32(ETH_REG_BASE + ETH_INT_MASK) = ETH_INT_MASK_TXB \|`
434			`ETH_INT_MASK_TXE \|`
435			`ETH_INT_MASK_RXF \|`
436			`ETH_INT_MASK_RXE \|`
437			`ETH_INT_MASK_BUSY \|`
438			`ETH_INT_MASK_TXC \|`
439			`ETH_INT_MASK_RXC;`
440			`}`
441
442	140	julius	`void eth_int_disable(void)`
443			`{`
444			`REG32(ETH_REG_BASE + ETH_INT_MASK) = 0;`
445			`}`
446
447	2	marcus.erl	`void eth_halt(void)`
448			`{`
449	140	julius	`/* Disable receiver and transmiter */`
450	2	marcus.erl	`REG32(ETH_REG_BASE + ETH_MODER) &= ~(ETH_MODER_RXEN \| ETH_MODER_TXEN);`
451			`}`
452	140	julius
453
454			`void eth_toggle_traffic_mon(void)`
455			`{`
456			`if (!eth_monitor_enabled)`
457			`{`
458			`printf("eth_toggle_traffic_mon: traffic monitor ENABLED\n");`
459			`printf("eth_toggle_traffic_mon: Warning - do not enable during tftp boot!\n");`
460			`eth_monitor_enabled = 1;`
461			`eth_int_enable();`
462			`}`
463			`else`
464			`{`
465			`eth_int_disable();`
466			`eth_monitor_enabled = 0;`
467			`printf("eth_toggle_traffic_mon: traffic monitor DISABLED\n");`
468
469
470			`}`
471
472			`}`
473	2	marcus.erl	`#endif`

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