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uboot-1.1.4-kirkwood/cpu/mpc5xxx/fec.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

1044 lines
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/*
* (C) Copyright 2003-2005
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* This file is based on mpc4200fec.c,
* (C) Copyright Motorola, Inc., 2000
*/
#include <common.h>
#include <mpc5xxx.h>
#include <malloc.h>
#include <net.h>
#include <miiphy.h>
#include "sdma.h"
#include "fec.h"
/* #define DEBUG 0x28 */
#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
defined(CONFIG_MPC5xxx_FEC)
#if !(defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif
#if (DEBUG & 0x60)
static void tfifo_print(char *devname, mpc5xxx_fec_priv *fec);
static void rfifo_print(char *devname, mpc5xxx_fec_priv *fec);
#endif /* DEBUG */
#if (DEBUG & 0x40)
static uint32 local_crc32(char *string, unsigned int crc_value, int len);
#endif
typedef struct {
uint8 data[1500]; /* actual data */
int length; /* actual length */
int used; /* buffer in use or not */
uint8 head[16]; /* MAC header(6 + 6 + 2) + 2(aligned) */
} NBUF;
int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal);
int fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data);
/********************************************************************/
#if (DEBUG & 0x2)
static void mpc5xxx_fec_phydump (char *devname)
{
uint16 phyStatus, i;
uint8 phyAddr = CONFIG_PHY_ADDR;
uint8 reg_mask[] = {
#if CONFIG_PHY_TYPE == 0x79c874 /* AMD Am79C874 */
/* regs to print: 0...7, 16...19, 21, 23, 24 */
1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
#else
/* regs to print: 0...8, 16...20 */
1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
};
for (i = 0; i < 32; i++) {
if (reg_mask[i]) {
miiphy_read(devname, phyAddr, i, &phyStatus);
printf("Mii reg %d: 0x%04x\n", i, phyStatus);
}
}
}
#endif
/********************************************************************/
static int mpc5xxx_fec_rbd_init(mpc5xxx_fec_priv *fec)
{
int ix;
char *data;
static int once = 0;
for (ix = 0; ix < FEC_RBD_NUM; ix++) {
if (!once) {
data = (char *)malloc(FEC_MAX_PKT_SIZE);
if (data == NULL) {
printf ("RBD INIT FAILED\n");
return -1;
}
fec->rbdBase[ix].dataPointer = (uint32)data;
}
fec->rbdBase[ix].status = FEC_RBD_EMPTY;
fec->rbdBase[ix].dataLength = 0;
}
once ++;
/*
* have the last RBD to close the ring
*/
fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
fec->rbdIndex = 0;
return 0;
}
/********************************************************************/
static void mpc5xxx_fec_tbd_init(mpc5xxx_fec_priv *fec)
{
int ix;
for (ix = 0; ix < FEC_TBD_NUM; ix++) {
fec->tbdBase[ix].status = 0;
}
/*
* Have the last TBD to close the ring
*/
fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
/*
* Initialize some indices
*/
fec->tbdIndex = 0;
fec->usedTbdIndex = 0;
fec->cleanTbdNum = FEC_TBD_NUM;
}
/********************************************************************/
static void mpc5xxx_fec_rbd_clean(mpc5xxx_fec_priv *fec, volatile FEC_RBD * pRbd)
{
/*
* Reset buffer descriptor as empty
*/
if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
else
pRbd->status = FEC_RBD_EMPTY;
pRbd->dataLength = 0;
/*
* Now, we have an empty RxBD, restart the SmartDMA receive task
*/
SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
/*
* Increment BD count
*/
fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
}
/********************************************************************/
static void mpc5xxx_fec_tbd_scrub(mpc5xxx_fec_priv *fec)
{
volatile FEC_TBD *pUsedTbd;
#if (DEBUG & 0x1)
printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
fec->cleanTbdNum, fec->usedTbdIndex);
#endif
/*
* process all the consumed TBDs
*/
while (fec->cleanTbdNum < FEC_TBD_NUM) {
pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
if (pUsedTbd->status & FEC_TBD_READY) {
#if (DEBUG & 0x20)
printf("Cannot clean TBD %d, in use\n", fec->cleanTbdNum);
#endif
return;
}
/*
* clean this buffer descriptor
*/
if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
pUsedTbd->status = FEC_TBD_WRAP;
else
pUsedTbd->status = 0;
/*
* update some indeces for a correct handling of the TBD ring
*/
fec->cleanTbdNum++;
fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
}
}
/********************************************************************/
static void mpc5xxx_fec_set_hwaddr(mpc5xxx_fec_priv *fec, char *mac)
{
uint8 currByte; /* byte for which to compute the CRC */
int byte; /* loop - counter */
int bit; /* loop - counter */
uint32 crc = 0xffffffff; /* initial value */
/*
* The algorithm used is the following:
* we loop on each of the six bytes of the provided address,
* and we compute the CRC by left-shifting the previous
* value by one position, so that each bit in the current
* byte of the address may contribute the calculation. If
* the latter and the MSB in the CRC are different, then
* the CRC value so computed is also ex-ored with the
* "polynomium generator". The current byte of the address
* is also shifted right by one bit at each iteration.
* This is because the CRC generatore in hardware is implemented
* as a shift-register with as many ex-ores as the radixes
* in the polynomium. This suggests that we represent the
* polynomiumm itself as a 32-bit constant.
*/
for (byte = 0; byte < 6; byte++) {
currByte = mac[byte];
for (bit = 0; bit < 8; bit++) {
if ((currByte & 0x01) ^ (crc & 0x01)) {
crc >>= 1;
crc = crc ^ 0xedb88320;
} else {
crc >>= 1;
}
currByte >>= 1;
}
}
crc = crc >> 26;
/*
* Set individual hash table register
*/
if (crc >= 32) {
fec->eth->iaddr1 = (1 << (crc - 32));
fec->eth->iaddr2 = 0;
} else {
fec->eth->iaddr1 = 0;
fec->eth->iaddr2 = (1 << crc);
}
/*
* Set physical address
*/
fec->eth->paddr1 = (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
}
/********************************************************************/
static int mpc5xxx_fec_init(struct eth_device *dev, bd_t * bis)
{
DECLARE_GLOBAL_DATA_PTR;
mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
#if (DEBUG & 0x1)
printf ("mpc5xxx_fec_init... Begin\n");
#endif
/*
* Initialize RxBD/TxBD rings
*/
mpc5xxx_fec_rbd_init(fec);
mpc5xxx_fec_tbd_init(fec);
/*
* Clear FEC-Lite interrupt event register(IEVENT)
*/
fec->eth->ievent = 0xffffffff;
/*
* Set interrupt mask register
*/
fec->eth->imask = 0x00000000;
/*
* Set FEC-Lite receive control register(R_CNTRL):
*/
if (fec->xcv_type == SEVENWIRE) {
/*
* Frame length=1518; 7-wire mode
*/
fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
} else {
/*
* Frame length=1518; MII mode;
*/
fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
}
fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
if (fec->xcv_type != SEVENWIRE) {
/*
* Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
* and do not drop the Preamble.
*/
fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); /* No MII for 7-wire mode */
}
/*
* Set Opcode/Pause Duration Register
*/
fec->eth->op_pause = 0x00010020; /*FIXME0xffff0020; */
/*
* Set Rx FIFO alarm and granularity value
*/
fec->eth->rfifo_cntrl = 0x0c000000
| (fec->eth->rfifo_cntrl & ~0x0f000000);
fec->eth->rfifo_alarm = 0x0000030c;
#if (DEBUG & 0x22)
if (fec->eth->rfifo_status & 0x00700000 ) {
printf("mpc5xxx_fec_init() RFIFO error\n");
}
#endif
/*
* Set Tx FIFO granularity value
*/
fec->eth->tfifo_cntrl = 0x0c000000
| (fec->eth->tfifo_cntrl & ~0x0f000000);
#if (DEBUG & 0x2)
printf("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
printf("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
#endif
/*
* Set transmit fifo watermark register(X_WMRK), default = 64
*/
fec->eth->tfifo_alarm = 0x00000080;
fec->eth->x_wmrk = 0x2;
/*
* Set individual address filter for unicast address
* and set physical address registers.
*/
mpc5xxx_fec_set_hwaddr(fec, (char *)dev->enetaddr);
/*
* Set multicast address filter
*/
fec->eth->gaddr1 = 0x00000000;
fec->eth->gaddr2 = 0x00000000;
/*
* Turn ON cheater FSM: ????
*/
fec->eth->xmit_fsm = 0x03000000;
#if defined(CONFIG_MPC5200)
/*
* Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
* work w/ the current receive task.
*/
sdma->PtdCntrl |= 0x00000001;
#endif
/*
* Set priority of different initiators
*/
sdma->IPR0 = 7; /* always */
sdma->IPR3 = 6; /* Eth RX */
sdma->IPR4 = 5; /* Eth Tx */
/*
* Clear SmartDMA task interrupt pending bits
*/
SDMA_CLEAR_IEVENT(FEC_RECV_TASK_NO);
/*
* Initialize SmartDMA parameters stored in SRAM
*/
*(volatile int *)FEC_TBD_BASE = (int)fec->tbdBase;
*(volatile int *)FEC_RBD_BASE = (int)fec->rbdBase;
*(volatile int *)FEC_TBD_NEXT = (int)fec->tbdBase;
*(volatile int *)FEC_RBD_NEXT = (int)fec->rbdBase;
/*
* Enable FEC-Lite controller
*/
fec->eth->ecntrl |= 0x00000006;
#if (DEBUG & 0x2)
if (fec->xcv_type != SEVENWIRE)
mpc5xxx_fec_phydump ();
#endif
/*
* Enable SmartDMA receive task
*/
SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
#if (DEBUG & 0x1)
printf("mpc5xxx_fec_init... Done \n");
#endif
return 1;
}
/********************************************************************/
static int mpc5xxx_fec_init_phy(struct eth_device *dev, bd_t * bis)
{
DECLARE_GLOBAL_DATA_PTR;
mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
const uint8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
#if (DEBUG & 0x1)
printf ("mpc5xxx_fec_init_phy... Begin\n");
#endif
/*
* Initialize GPIO pins
*/
if (fec->xcv_type == SEVENWIRE) {
/* 10MBit with 7-wire operation */
#if defined(CONFIG_TOTAL5200)
/* 7-wire and USB2 on Ethernet */
*(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00030000;
#else /* !CONFIG_TOTAL5200 */
/* 7-wire only */
*(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00020000;
#endif /* CONFIG_TOTAL5200 */
} else {
/* 100MBit with MD operation */
*(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00050000;
}
/*
* Clear FEC-Lite interrupt event register(IEVENT)
*/
fec->eth->ievent = 0xffffffff;
/*
* Set interrupt mask register
*/
fec->eth->imask = 0x00000000;
if (fec->xcv_type != SEVENWIRE) {
/*
* Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
* and do not drop the Preamble.
*/
fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); /* No MII for 7-wire mode */
}
if (fec->xcv_type != SEVENWIRE) {
/*
* Initialize PHY(LXT971A):
*
* Generally, on power up, the LXT971A reads its configuration
* pins to check for forced operation, If not cofigured for
* forced operation, it uses auto-negotiation/parallel detection
* to automatically determine line operating conditions.
* If the PHY device on the other side of the link supports
* auto-negotiation, the LXT971A auto-negotiates with it
* using Fast Link Pulse(FLP) Bursts. If the PHY partner does not
* support auto-negotiation, the LXT971A automatically detects
* the presence of either link pulses(10Mbps PHY) or Idle
* symbols(100Mbps) and sets its operating conditions accordingly.
*
* When auto-negotiation is controlled by software, the following
* steps are recommended.
*
* Note:
* The physical address is dependent on hardware configuration.
*
*/
int timeout = 1;
uint16 phyStatus;
/*
* Reset PHY, then delay 300ns
*/
miiphy_write(dev->name, phyAddr, 0x0, 0x8000);
udelay(1000);
if (fec->xcv_type == MII10) {
/*
* Force 10Base-T, FDX operation
*/
#if (DEBUG & 0x2)
printf("Forcing 10 Mbps ethernet link... ");
#endif
miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
/*
miiphy_write(dev->name, fec, phyAddr, 0x0, 0x0100);
*/
miiphy_write(dev->name, phyAddr, 0x0, 0x0180);
timeout = 20;
do { /* wait for link status to go down */
udelay(10000);
if ((timeout--) == 0) {
#if (DEBUG & 0x2)
printf("hmmm, should not have waited...");
#endif
break;
}
miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
#if (DEBUG & 0x2)
printf("=");
#endif
} while ((phyStatus & 0x0004)); /* !link up */
timeout = 1000;
do { /* wait for link status to come back up */
udelay(10000);
if ((timeout--) == 0) {
printf("failed. Link is down.\n");
break;
}
miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
#if (DEBUG & 0x2)
printf("+");
#endif
} while (!(phyStatus & 0x0004)); /* !link up */
#if (DEBUG & 0x2)
printf ("done.\n");
#endif
} else { /* MII100 */
/*
* Set the auto-negotiation advertisement register bits
*/
miiphy_write(dev->name, phyAddr, 0x4, 0x01e1);
/*
* Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
*/
miiphy_write(dev->name, phyAddr, 0x0, 0x1200);
/*
* Wait for AN completion
*/
timeout = 5000;
do {
udelay(1000);
if ((timeout--) == 0) {
#if (DEBUG & 0x2)
printf("PHY auto neg 0 failed...\n");
#endif
return -1;
}
if (miiphy_read(dev->name, phyAddr, 0x1, &phyStatus) != 0) {
#if (DEBUG & 0x2)
printf("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
#endif
return -1;
}
} while (!(phyStatus & 0x0004));
#if (DEBUG & 0x2)
printf("PHY auto neg complete! \n");
#endif
}
}
#if (DEBUG & 0x2)
if (fec->xcv_type != SEVENWIRE)
mpc5xxx_fec_phydump (dev->name);
#endif
#if (DEBUG & 0x1)
printf("mpc5xxx_fec_init_phy... Done \n");
#endif
return 1;
}
/********************************************************************/
static void mpc5xxx_fec_halt(struct eth_device *dev)
{
#if defined(CONFIG_MPC5200)
struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
#endif
mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
int counter = 0xffff;
#if (DEBUG & 0x2)
if (fec->xcv_type != SEVENWIRE)
mpc5xxx_fec_phydump ();
#endif
/*
* mask FEC chip interrupts
*/
fec->eth->imask = 0;
/*
* issue graceful stop command to the FEC transmitter if necessary
*/
fec->eth->x_cntrl |= 0x00000001;
/*
* wait for graceful stop to register
*/
while ((counter--) && (!(fec->eth->ievent & 0x10000000))) ;
/*
* Disable SmartDMA tasks
*/
SDMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
SDMA_TASK_DISABLE (FEC_RECV_TASK_NO);
#if defined(CONFIG_MPC5200)
/*
* Turn on COMM bus prefetch in the MGT5200 BestComm after we're
* done. It doesn't work w/ the current receive task.
*/
sdma->PtdCntrl &= ~0x00000001;
#endif
/*
* Disable the Ethernet Controller
*/
fec->eth->ecntrl &= 0xfffffffd;
/*
* Clear FIFO status registers
*/
fec->eth->rfifo_status &= 0x00700000;
fec->eth->tfifo_status &= 0x00700000;
fec->eth->reset_cntrl = 0x01000000;
/*
* Issue a reset command to the FEC chip
*/
fec->eth->ecntrl |= 0x1;
/*
* wait at least 16 clock cycles
*/
udelay(10);
#if (DEBUG & 0x3)
printf("Ethernet task stopped\n");
#endif
}
#if (DEBUG & 0x60)
/********************************************************************/
static void tfifo_print(char *devname, mpc5xxx_fec_priv *fec)
{
uint16 phyAddr = CONFIG_PHY_ADDR;
uint16 phyStatus;
if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
|| (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
miiphy_read(devname, phyAddr, 0x1, &phyStatus);
printf("\nphyStatus: 0x%04x\n", phyStatus);
printf("ecntrl: 0x%08x\n", fec->eth->ecntrl);
printf("ievent: 0x%08x\n", fec->eth->ievent);
printf("x_status: 0x%08x\n", fec->eth->x_status);
printf("tfifo: status 0x%08x\n", fec->eth->tfifo_status);
printf(" control 0x%08x\n", fec->eth->tfifo_cntrl);
printf(" lrfp 0x%08x\n", fec->eth->tfifo_lrf_ptr);
printf(" lwfp 0x%08x\n", fec->eth->tfifo_lwf_ptr);
printf(" alarm 0x%08x\n", fec->eth->tfifo_alarm);
printf(" readptr 0x%08x\n", fec->eth->tfifo_rdptr);
printf(" writptr 0x%08x\n", fec->eth->tfifo_wrptr);
}
}
static void rfifo_print(char *devname, mpc5xxx_fec_priv *fec)
{
uint16 phyAddr = CONFIG_PHY_ADDR;
uint16 phyStatus;
if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
|| (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
miiphy_read(devname, phyAddr, 0x1, &phyStatus);
printf("\nphyStatus: 0x%04x\n", phyStatus);
printf("ecntrl: 0x%08x\n", fec->eth->ecntrl);
printf("ievent: 0x%08x\n", fec->eth->ievent);
printf("x_status: 0x%08x\n", fec->eth->x_status);
printf("rfifo: status 0x%08x\n", fec->eth->rfifo_status);
printf(" control 0x%08x\n", fec->eth->rfifo_cntrl);
printf(" lrfp 0x%08x\n", fec->eth->rfifo_lrf_ptr);
printf(" lwfp 0x%08x\n", fec->eth->rfifo_lwf_ptr);
printf(" alarm 0x%08x\n", fec->eth->rfifo_alarm);
printf(" readptr 0x%08x\n", fec->eth->rfifo_rdptr);
printf(" writptr 0x%08x\n", fec->eth->rfifo_wrptr);
}
}
#endif /* DEBUG */
/********************************************************************/
static int mpc5xxx_fec_send(struct eth_device *dev, volatile void *eth_data,
int data_length)
{
/*
* This routine transmits one frame. This routine only accepts
* 6-byte Ethernet addresses.
*/
mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
volatile FEC_TBD *pTbd;
#if (DEBUG & 0x20)
printf("tbd status: 0x%04x\n", fec->tbdBase[0].status);
tfifo_print(dev->name, fec);
#endif
/*
* Clear Tx BD ring at first
*/
mpc5xxx_fec_tbd_scrub(fec);
/*
* Check for valid length of data.
*/
if ((data_length > 1500) || (data_length <= 0)) {
return -1;
}
/*
* Check the number of vacant TxBDs.
*/
if (fec->cleanTbdNum < 1) {
#if (DEBUG & 0x20)
printf("No available TxBDs ...\n");
#endif
return -1;
}
/*
* Get the first TxBD to send the mac header
*/
pTbd = &fec->tbdBase[fec->tbdIndex];
pTbd->dataLength = data_length;
pTbd->dataPointer = (uint32)eth_data;
pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
#if (DEBUG & 0x100)
printf("SDMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
#endif
/*
* Kick the MII i/f
*/
if (fec->xcv_type != SEVENWIRE) {
uint16 phyStatus;
miiphy_read(dev->name, 0, 0x1, &phyStatus);
}
/*
* Enable SmartDMA transmit task
*/
#if (DEBUG & 0x20)
tfifo_print(dev->name, fec);
#endif
SDMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
#if (DEBUG & 0x20)
tfifo_print(dev->name, fec);
#endif
#if (DEBUG & 0x8)
printf( "+" );
#endif
fec->cleanTbdNum -= 1;
#if (DEBUG & 0x129) && (DEBUG & 0x80000000)
printf ("smartDMA ethernet Tx task enabled\n");
#endif
/*
* wait until frame is sent .
*/
while (pTbd->status & FEC_TBD_READY) {
udelay(10);
#if (DEBUG & 0x8)
printf ("TDB status = %04x\n", pTbd->status);
#endif
}
return 0;
}
/********************************************************************/
static int mpc5xxx_fec_recv(struct eth_device *dev)
{
/*
* This command pulls one frame from the card
*/
mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
volatile FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
unsigned long ievent;
int frame_length, len = 0;
NBUF *frame;
uchar buff[FEC_MAX_PKT_SIZE];
#if (DEBUG & 0x1)
printf ("mpc5xxx_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 */
mpc5xxx_fec_halt(dev);
mpc5xxx_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) {
mpc5xxx_fec_halt(dev);
fec->eth->x_cntrl &= ~0x00000001;
mpc5xxx_fec_init(dev, NULL);
}
}
if (!(pRbd->status & FEC_RBD_EMPTY)) {
if ((pRbd->status & FEC_RBD_LAST) && !(pRbd->status & FEC_RBD_ERR) &&
((pRbd->dataLength - 4) > 14)) {
/*
* Get buffer address and size
*/
frame = (NBUF *)pRbd->dataPointer;
frame_length = pRbd->dataLength - 4;
#if (DEBUG & 0x20)
{
int i;
printf("recv data hdr:");
for (i = 0; i < 14; i++)
printf("%x ", *(frame->head + i));
printf("\n");
}
#endif
/*
* Fill the buffer and pass it to upper layers
*/
memcpy(buff, frame->head, 14);
memcpy(buff + 14, frame->data, frame_length);
NetReceive(buff, frame_length);
len = frame_length;
}
/*
* Reset buffer descriptor as empty
*/
mpc5xxx_fec_rbd_clean(fec, pRbd);
}
SDMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
return len;
}
/********************************************************************/
int mpc5xxx_fec_initialize(bd_t * bis)
{
mpc5xxx_fec_priv *fec;
struct eth_device *dev;
char *tmp, *end;
char env_enetaddr[6];
int i;
fec = (mpc5xxx_fec_priv *)malloc(sizeof(*fec));
dev = (struct eth_device *)malloc(sizeof(*dev));
memset(dev, 0, sizeof *dev);
fec->eth = (ethernet_regs *)MPC5XXX_FEC;
fec->tbdBase = (FEC_TBD *)FEC_BD_BASE;
fec->rbdBase = (FEC_RBD *)(FEC_BD_BASE + FEC_TBD_NUM * sizeof(FEC_TBD));
#if defined(CONFIG_CANMB) || defined(CONFIG_HMI1001) || \
defined(CONFIG_ICECUBE) || defined(CONFIG_INKA4X0) || \
defined(CONFIG_PM520) || defined(CONFIG_TOP5200) || \
defined(CONFIG_TQM5200) || defined(CONFIG_O2DNT)
# ifndef CONFIG_FEC_10MBIT
fec->xcv_type = MII100;
# else
fec->xcv_type = MII10;
# endif
#elif defined(CONFIG_TOTAL5200)
fec->xcv_type = SEVENWIRE;
#else
#error fec->xcv_type not initialized.
#endif
dev->priv = (void *)fec;
dev->iobase = MPC5XXX_FEC;
dev->init = mpc5xxx_fec_init;
dev->halt = mpc5xxx_fec_halt;
dev->send = mpc5xxx_fec_send;
dev->recv = mpc5xxx_fec_recv;
sprintf(dev->name, "FEC ETHERNET");
eth_register(dev);
#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
miiphy_register (dev->name,
fec5xxx_miiphy_read, fec5xxx_miiphy_write);
#endif
/*
* 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;
}
mpc5xxx_fec_set_hwaddr(fec, env_enetaddr);
}
mpc5xxx_fec_init_phy(dev, bis);
return 1;
}
/* MII-interface related functions */
/********************************************************************/
int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
{
ethernet_regs *eth = (ethernet_regs *)MPC5XXX_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 fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data)
{
ethernet_regs *eth = (ethernet_regs *)MPC5XXX_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_MPC5xxx_FEC */
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