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![Grzegorz Bernacki](/assets/img/avatar_default.png)
When frame larger than local RX buffer is received, it is split and handled by two buffer descriptors. Prior to this patch the FEC driver discarded contents of a buffer descriptor without the 'LAST' bit set, so the first part of the frame was lost in case of larger frames. This fix allows to safely combine the two pieces into the whole frame. Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
810 lines
18 KiB
C
810 lines
18 KiB
C
/*
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* (C) Copyright 2003-2007
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Derived from the MPC8xx FEC driver.
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* Adapted for MPC512x by Grzegorz Bernacki <gjb@semihalf.com>
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*/
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#include <common.h>
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#include <mpc512x.h>
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#include <malloc.h>
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#include <net.h>
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#include <miiphy.h>
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#include "fec.h"
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DECLARE_GLOBAL_DATA_PTR;
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#define DEBUG 0
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#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
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defined(CONFIG_MPC512x_FEC)
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#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
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#error "CONFIG_MII has to be defined!"
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#endif
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#if (DEBUG & 0x40)
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static uint32 local_crc32(char *string, unsigned int crc_value, int len);
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#endif
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int fec512x_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal);
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int fec512x_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data);
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int mpc512x_fec_init_phy(struct eth_device *dev, bd_t * bis);
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static uchar rx_buff[FEC_MAX_PKT_SIZE];
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static int rx_buff_idx = 0;
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/********************************************************************/
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#if (DEBUG & 0x2)
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static void mpc512x_fec_phydump (char *devname)
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{
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uint16 phyStatus, i;
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uint8 phyAddr = CONFIG_PHY_ADDR;
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uint8 reg_mask[] = {
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/* regs to print: 0...8, 21,27,31 */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1,
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};
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for (i = 0; i < 32; i++) {
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if (reg_mask[i]) {
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miiphy_read (devname, phyAddr, i, &phyStatus);
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printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
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}
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}
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}
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#endif
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/********************************************************************/
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static int mpc512x_fec_bd_init (mpc512x_fec_priv *fec)
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{
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int ix;
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/*
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* Receive BDs init
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*/
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for (ix = 0; ix < FEC_RBD_NUM; ix++) {
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fec->bdBase->rbd[ix].dataPointer = (uint32)&fec->bdBase->recv_frames[ix];
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fec->bdBase->rbd[ix].status = FEC_RBD_EMPTY;
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fec->bdBase->rbd[ix].dataLength = 0;
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}
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/*
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* have the last RBD to close the ring
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*/
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fec->bdBase->rbd[ix - 1].status |= FEC_RBD_WRAP;
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fec->rbdIndex = 0;
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/*
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* Trasmit BDs init
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*/
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for (ix = 0; ix < FEC_TBD_NUM; ix++) {
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fec->bdBase->tbd[ix].status = 0;
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}
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/*
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* Have the last TBD to close the ring
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*/
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fec->bdBase->tbd[ix - 1].status |= FEC_TBD_WRAP;
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/*
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* Initialize some indices
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*/
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fec->tbdIndex = 0;
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fec->usedTbdIndex = 0;
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fec->cleanTbdNum = FEC_TBD_NUM;
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return 0;
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}
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/********************************************************************/
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static void mpc512x_fec_rbd_clean (mpc512x_fec_priv *fec, volatile FEC_RBD * pRbd)
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{
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/*
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* Reset buffer descriptor as empty
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*/
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if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
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pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
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else
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pRbd->status = FEC_RBD_EMPTY;
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pRbd->dataLength = 0;
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/*
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* Increment BD count
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*/
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fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
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/*
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* Now, we have an empty RxBD, notify FEC
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*/
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fec->eth->r_des_active = 0x01000000; /* Descriptor polling active */
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}
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/********************************************************************/
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static void mpc512x_fec_tbd_scrub (mpc512x_fec_priv *fec)
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{
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volatile FEC_TBD *pUsedTbd;
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#if (DEBUG & 0x1)
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printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
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fec->cleanTbdNum, fec->usedTbdIndex);
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#endif
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/*
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* process all the consumed TBDs
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*/
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while (fec->cleanTbdNum < FEC_TBD_NUM) {
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pUsedTbd = &fec->bdBase->tbd[fec->usedTbdIndex];
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if (pUsedTbd->status & FEC_TBD_READY) {
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#if (DEBUG & 0x20)
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printf ("Cannot clean TBD %d, in use\n", fec->usedTbdIndex);
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#endif
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return;
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}
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/*
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* clean this buffer descriptor
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*/
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if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
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pUsedTbd->status = FEC_TBD_WRAP;
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else
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pUsedTbd->status = 0;
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/*
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* update some indeces for a correct handling of the TBD ring
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*/
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fec->cleanTbdNum++;
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fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
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}
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}
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/********************************************************************/
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static void mpc512x_fec_set_hwaddr (mpc512x_fec_priv *fec, char *mac)
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{
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uint8 currByte; /* byte for which to compute the CRC */
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int byte; /* loop - counter */
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int bit; /* loop - counter */
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uint32 crc = 0xffffffff; /* initial value */
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/*
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* The algorithm used is the following:
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* we loop on each of the six bytes of the provided address,
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* and we compute the CRC by left-shifting the previous
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* value by one position, so that each bit in the current
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* byte of the address may contribute the calculation. If
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* the latter and the MSB in the CRC are different, then
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* the CRC value so computed is also ex-ored with the
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* "polynomium generator". The current byte of the address
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* is also shifted right by one bit at each iteration.
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* This is because the CRC generatore in hardware is implemented
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* as a shift-register with as many ex-ores as the radixes
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* in the polynomium. This suggests that we represent the
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* polynomiumm itself as a 32-bit constant.
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*/
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for (byte = 0; byte < 6; byte++) {
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currByte = mac[byte];
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for (bit = 0; bit < 8; bit++) {
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if ((currByte & 0x01) ^ (crc & 0x01)) {
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crc >>= 1;
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crc = crc ^ 0xedb88320;
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} else {
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crc >>= 1;
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}
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currByte >>= 1;
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}
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}
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crc = crc >> 26;
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/*
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* Set individual hash table register
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*/
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if (crc >= 32) {
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fec->eth->iaddr1 = (1 << (crc - 32));
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fec->eth->iaddr2 = 0;
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} else {
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fec->eth->iaddr1 = 0;
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fec->eth->iaddr2 = (1 << crc);
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}
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/*
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* Set physical address
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*/
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fec->eth->paddr1 = (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
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fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
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}
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/********************************************************************/
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static int mpc512x_fec_init (struct eth_device *dev, bd_t * bis)
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{
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mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
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#if (DEBUG & 0x1)
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printf ("mpc512x_fec_init... Begin\n");
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#endif
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/* Set interrupt mask register */
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fec->eth->imask = 0x00000000;
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/* Clear FEC-Lite interrupt event register(IEVENT) */
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fec->eth->ievent = 0xffffffff;
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/* Set transmit fifo watermark register(X_WMRK), default = 64 */
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fec->eth->x_wmrk = 0x0;
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/* Set Opcode/Pause Duration Register */
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fec->eth->op_pause = 0x00010020;
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/* Frame length=1518; MII mode */
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fec->eth->r_cntrl = 0x05ee0024;
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/* Half-duplex, heartbeat disabled */
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fec->eth->x_cntrl = 0x00000000;
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/* Enable MIB counters */
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fec->eth->mib_control = 0x0;
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/* Setup recv fifo start and buff size */
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fec->eth->r_fstart = 0x500;
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fec->eth->r_buff_size = 0x5e0;
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/* Setup BD base addresses */
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fec->eth->r_des_start = (uint32)fec->bdBase->rbd;
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fec->eth->x_des_start = (uint32)fec->bdBase->tbd;
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/* DMA Control */
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fec->eth->dma_control = 0xc0000000;
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/* Enable FEC */
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fec->eth->ecntrl |= 0x00000006;
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/* Initilize addresses and status words of BDs */
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mpc512x_fec_bd_init (fec);
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/* Descriptor polling active */
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fec->eth->r_des_active = 0x01000000;
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#if (DEBUG & 0x1)
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printf("mpc512x_fec_init... Done \n");
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#endif
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return 1;
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}
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/********************************************************************/
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int mpc512x_fec_init_phy (struct eth_device *dev, bd_t * bis)
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{
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mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
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const uint8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
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int timeout = 1;
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uint16 phyStatus;
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#if (DEBUG & 0x1)
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printf ("mpc512x_fec_init_phy... Begin\n");
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#endif
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/*
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* Clear FEC-Lite interrupt event register(IEVENT)
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*/
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fec->eth->ievent = 0xffffffff;
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/*
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* Set interrupt mask register
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*/
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fec->eth->imask = 0x00000000;
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if (fec->xcv_type != SEVENWIRE) {
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/*
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* Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
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* and do not drop the Preamble.
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*/
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fec->eth->mii_speed = (((gd->ipb_clk / 1000000) / 5) + 1) << 1;
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/*
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* Reset PHY, then delay 300ns
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*/
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miiphy_write (dev->name, phyAddr, 0x0, 0x8000);
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udelay (1000);
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if (fec->xcv_type == MII10) {
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/*
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* Force 10Base-T, FDX operation
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*/
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#if (DEBUG & 0x2)
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printf ("Forcing 10 Mbps ethernet link... ");
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#endif
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miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
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miiphy_write (dev->name, phyAddr, 0x0, 0x0180);
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timeout = 20;
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do { /* wait for link status to go down */
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udelay (10000);
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if ((timeout--) == 0) {
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#if (DEBUG & 0x2)
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printf ("hmmm, should not have waited...");
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#endif
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break;
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}
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miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
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#if (DEBUG & 0x2)
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printf ("=");
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#endif
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} while ((phyStatus & 0x0004)); /* !link up */
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timeout = 1000;
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do { /* wait for link status to come back up */
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udelay (10000);
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if ((timeout--) == 0) {
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printf ("failed. Link is down.\n");
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break;
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}
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miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
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#if (DEBUG & 0x2)
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printf ("+");
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#endif
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} while (!(phyStatus & 0x0004)); /* !link up */
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#if (DEBUG & 0x2)
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printf ("done.\n");
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#endif
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} else { /* MII100 */
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/*
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* Set the auto-negotiation advertisement register bits
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*/
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miiphy_write (dev->name, phyAddr, 0x4, 0x01e1);
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/*
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* Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
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*/
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miiphy_write (dev->name, phyAddr, 0x0, 0x1200);
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/*
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* Wait for AN completion
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*/
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timeout = 50000;
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do {
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udelay (1000);
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if ((timeout--) == 0) {
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#if (DEBUG & 0x2)
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printf ("PHY auto neg 0 failed...\n");
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#endif
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return -1;
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}
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if (miiphy_read (dev->name, phyAddr, 0x1, &phyStatus) != 0) {
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#if (DEBUG & 0x2)
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printf ("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
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#endif
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return -1;
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}
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} while (!(phyStatus & 0x0004));
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#if (DEBUG & 0x2)
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printf ("PHY auto neg complete! \n");
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#endif
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}
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}
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#if (DEBUG & 0x2)
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if (fec->xcv_type != SEVENWIRE)
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mpc512x_fec_phydump (dev->name);
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#endif
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#if (DEBUG & 0x1)
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printf ("mpc512x_fec_init_phy... Done \n");
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#endif
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return 1;
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}
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/********************************************************************/
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static void mpc512x_fec_halt (struct eth_device *dev)
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{
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mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
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int counter = 0xffff;
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#if (DEBUG & 0x2)
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if (fec->xcv_type != SEVENWIRE)
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mpc512x_fec_phydump (dev->name);
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#endif
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/*
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* mask FEC chip interrupts
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*/
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fec->eth->imask = 0;
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/*
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* issue graceful stop command to the FEC transmitter if necessary
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*/
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fec->eth->x_cntrl |= 0x00000001;
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/*
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* wait for graceful stop to register
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*/
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while ((counter--) && (!(fec->eth->ievent & 0x10000000))) ;
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/*
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* Disable the Ethernet Controller
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*/
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fec->eth->ecntrl &= 0xfffffffd;
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/*
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* Issue a reset command to the FEC chip
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*/
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fec->eth->ecntrl |= 0x1;
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/*
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* wait at least 16 clock cycles
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*/
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udelay (10);
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#if (DEBUG & 0x3)
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printf ("Ethernet task stopped\n");
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#endif
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}
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/********************************************************************/
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static int mpc512x_fec_send (struct eth_device *dev, volatile void *eth_data,
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int data_length)
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{
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/*
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* This routine transmits one frame. This routine only accepts
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* 6-byte Ethernet addresses.
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*/
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mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
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volatile FEC_TBD *pTbd;
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#if (DEBUG & 0x20)
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printf("tbd status: 0x%04x\n", fec->tbdBase[fec->tbdIndex].status);
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#endif
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/*
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* Clear Tx BD ring at first
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*/
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mpc512x_fec_tbd_scrub (fec);
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/*
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* Check for valid length of data.
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*/
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if ((data_length > 1500) || (data_length <= 0)) {
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return -1;
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}
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/*
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* Check the number of vacant TxBDs.
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*/
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if (fec->cleanTbdNum < 1) {
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#if (DEBUG & 0x20)
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printf ("No available TxBDs ...\n");
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#endif
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return -1;
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}
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/*
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* Get the first TxBD to send the mac header
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*/
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pTbd = &fec->bdBase->tbd[fec->tbdIndex];
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pTbd->dataLength = data_length;
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pTbd->dataPointer = (uint32)eth_data;
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pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
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fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
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/* Activate transmit Buffer Descriptor polling */
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fec->eth->x_des_active = 0x01000000; /* Descriptor polling active */
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#if (DEBUG & 0x8)
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printf ( "+" );
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#endif
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fec->cleanTbdNum -= 1;
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/*
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* wait until frame is sent .
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*/
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while (pTbd->status & FEC_TBD_READY) {
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udelay (10);
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#if (DEBUG & 0x8)
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printf ("TDB status = %04x\n", pTbd->status);
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#endif
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}
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return 0;
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}
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/********************************************************************/
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static int mpc512x_fec_recv (struct eth_device *dev)
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{
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/*
|
|
* This command pulls one frame from the card
|
|
*/
|
|
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
|
|
volatile FEC_RBD *pRbd = &fec->bdBase->rbd[fec->rbdIndex];
|
|
unsigned long ievent;
|
|
int frame_length = 0;
|
|
|
|
#if (DEBUG & 0x1)
|
|
printf ("mpc512x_fec_recv %d Start...\n", fec->rbdIndex);
|
|
#endif
|
|
#if (DEBUG & 0x8)
|
|
printf( "-" );
|
|
#endif
|
|
|
|
/*
|
|
* Check if any critical events have happened
|
|
*/
|
|
ievent = fec->eth->ievent;
|
|
fec->eth->ievent = ievent;
|
|
if (ievent & 0x20060000) {
|
|
/* BABT, Rx/Tx FIFO errors */
|
|
mpc512x_fec_halt (dev);
|
|
mpc512x_fec_init (dev, NULL);
|
|
return 0;
|
|
}
|
|
if (ievent & 0x80000000) {
|
|
/* Heartbeat error */
|
|
fec->eth->x_cntrl |= 0x00000001;
|
|
}
|
|
if (ievent & 0x10000000) {
|
|
/* Graceful stop complete */
|
|
if (fec->eth->x_cntrl & 0x00000001) {
|
|
mpc512x_fec_halt (dev);
|
|
fec->eth->x_cntrl &= ~0x00000001;
|
|
mpc512x_fec_init (dev, NULL);
|
|
}
|
|
}
|
|
|
|
if (!(pRbd->status & FEC_RBD_EMPTY)) {
|
|
if (!(pRbd->status & FEC_RBD_ERR) &&
|
|
((pRbd->dataLength - 4) > 14)) {
|
|
|
|
/*
|
|
* Get buffer size
|
|
*/
|
|
if (pRbd->status & FEC_RBD_LAST)
|
|
frame_length = pRbd->dataLength - 4;
|
|
else
|
|
frame_length = pRbd->dataLength;
|
|
#if (DEBUG & 0x20)
|
|
{
|
|
int i;
|
|
printf ("recv data length 0x%08x data hdr: ",
|
|
pRbd->dataLength);
|
|
for (i = 0; i < 14; i++)
|
|
printf ("%x ", *((uint8*)pRbd->dataPointer + i));
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
/*
|
|
* Fill the buffer and pass it to upper layers
|
|
*/
|
|
memcpy (&rx_buff[rx_buff_idx], (void*)pRbd->dataPointer,
|
|
frame_length - rx_buff_idx);
|
|
rx_buff_idx = frame_length;
|
|
|
|
if (pRbd->status & FEC_RBD_LAST) {
|
|
NetReceive ((uchar*)rx_buff, frame_length);
|
|
rx_buff_idx = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reset buffer descriptor as empty
|
|
*/
|
|
mpc512x_fec_rbd_clean (fec, pRbd);
|
|
}
|
|
|
|
/* Try to fill Buffer Descriptors */
|
|
fec->eth->r_des_active = 0x01000000; /* Descriptor polling active */
|
|
return frame_length;
|
|
}
|
|
|
|
/********************************************************************/
|
|
int mpc512x_fec_initialize (bd_t * bis)
|
|
{
|
|
|
|
immap_t *im = (immap_t*) CFG_IMMR;
|
|
mpc512x_fec_priv *fec;
|
|
struct eth_device *dev;
|
|
int i;
|
|
char *tmp, *end, env_enetaddr[6];
|
|
uint32 *reg;
|
|
void * bd;
|
|
|
|
fec = (mpc512x_fec_priv *) malloc (sizeof(*fec));
|
|
dev = (struct eth_device *) malloc (sizeof(*dev));
|
|
memset (dev, 0, sizeof *dev);
|
|
|
|
fec->eth = (ethernet_regs *) MPC512X_FEC;
|
|
|
|
# ifndef CONFIG_FEC_10MBIT
|
|
fec->xcv_type = MII100;
|
|
# else
|
|
fec->xcv_type = MII10;
|
|
# endif
|
|
dev->priv = (void *)fec;
|
|
dev->iobase = MPC512X_FEC;
|
|
dev->init = mpc512x_fec_init;
|
|
dev->halt = mpc512x_fec_halt;
|
|
dev->send = mpc512x_fec_send;
|
|
dev->recv = mpc512x_fec_recv;
|
|
|
|
sprintf (dev->name, "FEC ETHERNET");
|
|
eth_register (dev);
|
|
|
|
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
|
|
miiphy_register (dev->name,
|
|
fec512x_miiphy_read, fec512x_miiphy_write);
|
|
#endif
|
|
|
|
/*
|
|
* Initialize I\O pins
|
|
*/
|
|
reg = (uint32 *) &(im->io_ctrl.regs[PSC0_0_IDX]);
|
|
|
|
for (i = 0; i < 15; i++)
|
|
reg[i] = IOCTRL_MUX_FEC | 0x00000001;
|
|
|
|
im->io_ctrl.regs[SPDIF_TXCLOCK_IDX] = IOCTRL_MUX_FEC | 0x00000001;
|
|
im->io_ctrl.regs[SPDIF_TX_IDX] = IOCTRL_MUX_FEC | 0x00000001;
|
|
im->io_ctrl.regs[SPDIF_RX_IDX] = IOCTRL_MUX_FEC | 0x00000001;
|
|
|
|
/* Clean up space FEC's MIB and FIFO RAM ...*/
|
|
memset ((void *) MPC512X_FEC + 0x200, 0x00, 0x400);
|
|
|
|
/*
|
|
* Malloc space for BDs (must be quad word-aligned)
|
|
* this pointer is lost, so cannot be freed
|
|
*/
|
|
bd = malloc (sizeof(mpc512x_buff_descs) + 0x1f);
|
|
fec->bdBase = (mpc512x_buff_descs*)((uint32)bd & 0xfffffff0);
|
|
memset ((void *) bd, 0x00, sizeof(mpc512x_buff_descs) + 0x1f);
|
|
|
|
/*
|
|
* Set interrupt mask register
|
|
*/
|
|
fec->eth->imask = 0x00000000;
|
|
|
|
/*
|
|
* Clear FEC-Lite interrupt event register(IEVENT)
|
|
*/
|
|
fec->eth->ievent = 0xffffffff;
|
|
|
|
/*
|
|
* Try to set the mac address now. The fec mac address is
|
|
* a garbage after reset. When not using fec for booting
|
|
* the Linux fec driver will try to work with this garbage.
|
|
*/
|
|
tmp = getenv ("ethaddr");
|
|
if (tmp) {
|
|
for (i=0; i<6; i++) {
|
|
env_enetaddr[i] = tmp ? simple_strtoul (tmp, &end, 16) : 0;
|
|
if (tmp)
|
|
tmp = (*end) ? end+1 : end;
|
|
}
|
|
mpc512x_fec_set_hwaddr (fec, env_enetaddr);
|
|
fec->eth->gaddr1 = 0x00000000;
|
|
fec->eth->gaddr2 = 0x00000000;
|
|
}
|
|
|
|
mpc512x_fec_init_phy (dev, bis);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* MII-interface related functions */
|
|
/********************************************************************/
|
|
int fec512x_miiphy_read (char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
|
|
{
|
|
ethernet_regs *eth = (ethernet_regs *) MPC512X_FEC;
|
|
uint32 reg; /* convenient holder for the PHY register */
|
|
uint32 phy; /* convenient holder for the PHY */
|
|
int timeout = 0xffff;
|
|
|
|
/*
|
|
* reading from any PHY's register is done by properly
|
|
* programming the FEC's MII data register.
|
|
*/
|
|
reg = regAddr << FEC_MII_DATA_RA_SHIFT;
|
|
phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
|
|
|
|
eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy | reg);
|
|
|
|
/*
|
|
* wait for the related interrupt
|
|
*/
|
|
while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
|
|
|
|
if (timeout == 0) {
|
|
#if (DEBUG & 0x2)
|
|
printf ("Read MDIO failed...\n");
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* clear mii interrupt bit
|
|
*/
|
|
eth->ievent = 0x00800000;
|
|
|
|
/*
|
|
* it's now safe to read the PHY's register
|
|
*/
|
|
*retVal = (uint16) eth->mii_data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/********************************************************************/
|
|
int fec512x_miiphy_write (char *devname, uint8 phyAddr, uint8 regAddr, uint16 data)
|
|
{
|
|
ethernet_regs *eth = (ethernet_regs *) MPC512X_FEC;
|
|
uint32 reg; /* convenient holder for the PHY register */
|
|
uint32 phy; /* convenient holder for the PHY */
|
|
int timeout = 0xffff;
|
|
|
|
reg = regAddr << FEC_MII_DATA_RA_SHIFT;
|
|
phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
|
|
|
|
eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
|
|
FEC_MII_DATA_TA | phy | reg | data);
|
|
|
|
/*
|
|
* wait for the MII interrupt
|
|
*/
|
|
while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
|
|
|
|
if (timeout == 0) {
|
|
#if (DEBUG & 0x2)
|
|
printf ("Write MDIO failed...\n");
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* clear MII interrupt bit
|
|
*/
|
|
eth->ievent = 0x00800000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if (DEBUG & 0x40)
|
|
static uint32 local_crc32 (char *string, unsigned int crc_value, int len)
|
|
{
|
|
int i;
|
|
char c;
|
|
unsigned int crc, count;
|
|
|
|
/*
|
|
* crc32 algorithm
|
|
*/
|
|
/*
|
|
* crc = 0xffffffff; * The initialized value should be 0xffffffff
|
|
*/
|
|
crc = crc_value;
|
|
|
|
for (i = len; --i >= 0;) {
|
|
c = *string++;
|
|
for (count = 0; count < 8; count++) {
|
|
if ((c & 0x01) ^ (crc & 0x01)) {
|
|
crc >>= 1;
|
|
crc = crc ^ 0xedb88320;
|
|
} else {
|
|
crc >>= 1;
|
|
}
|
|
c >>= 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* In big endian system, do byte swaping for crc value
|
|
*/
|
|
/**/ return crc;
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
#endif /* CONFIG_MPC512x_FEC */
|