diff options
Diffstat (limited to 'cpu/mpc5xxx/fec.c')
| -rw-r--r-- | cpu/mpc5xxx/fec.c | 944 |
1 files changed, 944 insertions, 0 deletions
diff --git a/cpu/mpc5xxx/fec.c b/cpu/mpc5xxx/fec.c new file mode 100644 index 0000000000..b8e2560cf7 --- /dev/null +++ b/cpu/mpc5xxx/fec.c @@ -0,0 +1,944 @@ +/* + * (C) Copyright 2003 + * 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 0x8 + +#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \ + defined(CONFIG_MPC5XXX_FEC) + +#if (DEBUG & 0x60) +static void tfifo_print(mpc5xxx_fec_priv *fec); +static void rfifo_print(mpc5xxx_fec_priv *fec); +#endif /* DEBUG */ + +#if (DEBUG & 0x40) +static uint32 local_crc32(char *string, unsigned int crc_value, int len); +#endif + +/********************************************************************/ +static int mpc5xxx_fec_rbd_init(mpc5xxx_fec_priv *fec) +{ + int ix; + char *data; + + /* + * the receive ring is located right after the transmit one + */ + for (ix = 0; ix < FEC_RBD_NUM; ix++) { + data = (char *)malloc(FEC_MAX_PKT_SIZE); + if (data == NULL) { + printf ("RBD INIT FAILED\n"); + return -1; + } + fec->rbdBase[ix].status = FEC_RBD_EMPTY; + fec->rbdBase[ix].dataLength = 0; + fec->rbdBase[ix].dataPointer = (uint32)data; + } + + /* + * 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, 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) +{ + 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) +{ + mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv; + struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA; + const uint8 phyAddr = 0; /* Only one PHY */ + +#if (DEBUG & 0x1) + printf ("mpc5xxx_fec_init... Begin\n"); +#endif + + /* + * Initialize RxBD/TxBD rings + */ + mpc5xxx_fec_rbd_init(fec); + mpc5xxx_fec_tbd_init(fec); + + /* + * Initialize GPIO pins + */ + if (fec->xcv_type == SEVENWIRE) { + /* 10MBit with 7-wire operation */ + *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00020000; + } 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; + + /* + * 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 */ + } + + if (fec->xcv_type == SEVENWIRE) { + /* + * Set FEC-Lite transmit control register(X_CNTRL): + */ + /*fec->eth->x_cntrl = 0x00000002; */ /* half-duplex, heartbeat */ + fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */ + } else { + /*fec->eth->x_cntrl = 0x00000006; */ /* full-duplex, heartbeat */ + fec->eth->x_cntrl = 0x00000004; /* full-duplex, heartbeat disabled */ + + /* + * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock(25Mhz) + * and do not drop the Preamble. + */ + fec->eth->mii_speed = (0x5 << 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_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; +#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, 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); + + /* + * Set SmartDMA intMask register to enable SmartDMA task interrupts + */ + SDMA_INT_ENABLE(FEC_RECV_TASK_NO); + + /* + * Initialize SmartDMA parameters stored in SRAM + */ + *(int *)FEC_TBD_BASE = (int)fec->tbdBase; + *(int *)FEC_RBD_BASE = (int)fec->rbdBase; + *(int *)FEC_TBD_NEXT = (int)fec->tbdBase; + *(int *)FEC_RBD_NEXT = (int)fec->rbdBase; + + 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(phyAddr, 0x0, 0x8000); + udelay(1000); + + if (fec->xcv_type == MII10) { + /* + * Force 10Base-T, FDX operation + */ + printf("Forcing 10 Mbps ethernet link... "); + miiphy_read(phyAddr, 0x1, &phyStatus); + /* + miiphy_write(fec, phyAddr, 0x0, 0x0100); + */ + miiphy_write(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(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(phyAddr, 0x1, &phyStatus); +#if (DEBUG & 0x2) + printf("+"); +#endif + } while (!(phyStatus & 0x0004)); /* !link up */ + + printf ("done.\n"); + } else { /* MII100 */ + /* + * Set the auto-negotiation advertisement register bits + */ + miiphy_write(phyAddr, 0x4, 0x01e1); + + /* + * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation + */ + miiphy_write(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(phyAddr, 0x1, &phyStatus) != 0) { +#if (DEBUG & 0x2) + printf("PHY auto neg 1 failed 0x%04x...\n", phyStatus); +#endif + return -1; + } + } while ((phyStatus & 0x0020) != 0x0020); + +#if (DEBUG & 0x2) + printf("PHY auto neg complete! \n"); +#endif + } + + } + + /* + * Enable FEC-Lite controller + */ + fec->eth->ecntrl |= 0x00000006; + + if (fec->xcv_type != SEVENWIRE) { +#if (DEBUG & 0x2) + uint16 phyStatus, i; + uint8 phyAddr = 0; + + for (i = 0; i < 9; i++) { + miiphy_read(phyAddr, i, &phyStatus); + printf("Mii reg %d: 0x%04x\n", i, phyStatus); + } + for (i = 16; i < 21; i++) { + miiphy_read(phyAddr, i, &phyStatus); + printf("Mii reg %d: 0x%04x\n", i, phyStatus); + } +#endif + } + /* + * Enable SmartDMA receive task + */ + SDMA_TASK_ENABLE(FEC_RECV_TASK_NO); + +#if (DEBUG & 0x1) + printf("mpc5xxx_fec_init... Done \n"); +#endif + + return 0; +} + +/********************************************************************/ +static void mpc5xxx_fec_halt(struct eth_device *dev) +{ + mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv; + struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA; + int counter = 0xffff; + +#if (DEBUG & 0x2) + if (fec->xcv_type != SEVENWIRE) { + uint16 phyStatus, i; + uint8 phyAddr = 0; + + for (i = 0; i < 9; i++) { + miiphy_read(phyAddr, i, &phyStatus); + printf("Mii reg %d: 0x%04x\n", i, phyStatus); + } + for (i = 16; i < 21; i++) { + miiphy_read(phyAddr, i, &phyStatus); + printf ("Mii reg %d: 0x%04x\n", i, phyStatus); + } + } +#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))) ; + + SDMA_INT_DISABLE (FEC_RECV_TASK_NO); + + /* + * 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(mpc5xxx_fec_priv *fec) +{ + uint16 phyAddr = 0; + uint16 phyStatus; + + if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr) + || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) { + + miiphy_read(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(mpc5xxx_fec_priv *fec) +{ + uint16 phyAddr = 0; + uint16 phyStatus; + + if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr) + || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) { + + miiphy_read(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; + FEC_TBD *pTbd; + +#if (DEBUG & 0x20) + printf("tbd status: 0x%04x\n", fec->tbdBase[0].status); + tfifo_print(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_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(0, 0x1, &phyStatus); + } + + /* + * Enable SmartDMA transmit task + */ + +#if (DEBUG & 0x20) + tfifo_print(fec); +#endif + SDMA_TASK_ENABLE (FEC_XMIT_TASK_NO); +#if (DEBUG & 0x20) + tfifo_print(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; + FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex]; + unsigned long ievent; + int frame_length; + char *frame; + +#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); + } + } + + /* + * Do we have data in Rx FIFO? + */ + if ((pRbd->status & FEC_RBD_EMPTY) || !(pRbd->status & FEC_RBD_LAST)){ + return 0; + } + + /* + * Pass the packet up only if reception was Ok + */ + if ((pRbd->dataLength <= 14) || (pRbd->status & FEC_RBD_ERR)) { + mpc5xxx_fec_rbd_clean(fec, pRbd); +#if (DEBUG & 0x8) + printf( "X0" ); +#endif + return 0; + } + + /* + * Get buffer address and size + */ + frame = (char *)pRbd->dataPointer; + frame_length = pRbd->dataLength; + + /* + * Pass the buffer to upper layers + */ + NetReceive(frame, frame_length); + + /* + * Reset buffer descriptor as empty + */ + mpc5xxx_fec_rbd_clean(fec, pRbd); + + return frame_length; +} + + +/********************************************************************/ +int mpc5xxx_fec_initialize(bd_t * bis) +{ + mpc5xxx_fec_priv *fec; + struct eth_device *dev; + + fec = (mpc5xxx_fec_priv *)malloc(sizeof(*fec)); + dev = (struct eth_device *)malloc(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)); +#ifdef CONFIG_ICECUBE + fec->xcv_type = MII100; +#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; + + eth_register(dev); + + return 1; +} + +/* MII-interface related functions */ +/********************************************************************/ +int miiphy_read(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 miiphy_write(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 */ |
