diff options
Diffstat (limited to 'cpu/mpc512x/fec.c')
| -rw-r--r-- | cpu/mpc512x/fec.c | 794 |
1 files changed, 0 insertions, 794 deletions
diff --git a/cpu/mpc512x/fec.c b/cpu/mpc512x/fec.c deleted file mode 100644 index e9df7de..0000000 --- a/cpu/mpc512x/fec.c +++ /dev/null @@ -1,794 +0,0 @@ -/* - * (C) Copyright 2003-2007 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * Derived from the MPC8xx FEC driver. - * Adapted for MPC512x by Grzegorz Bernacki <gjb@semihalf.com> - */ - -#include <common.h> -#include <mpc512x.h> -#include <malloc.h> -#include <net.h> -#include <miiphy.h> -#include "fec.h" - -DECLARE_GLOBAL_DATA_PTR; - -#define DEBUG 0 - -#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) && \ - defined(CONFIG_MPC512x_FEC) - -#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII)) -#error "CONFIG_MII has to be defined!" -#endif - -#if (DEBUG & 0x40) -static uint32 local_crc32(char *string, unsigned int crc_value, int len); -#endif - -int fec512x_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal); -int fec512x_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data); -int mpc512x_fec_init_phy(struct eth_device *dev, bd_t * bis); - -static uchar rx_buff[FEC_BUFFER_SIZE]; -static int rx_buff_idx = 0; - -/********************************************************************/ -#if (DEBUG & 0x2) -static void mpc512x_fec_phydump (char *devname) -{ - uint16 phyStatus, i; - uint8 phyAddr = CONFIG_PHY_ADDR; - uint8 reg_mask[] = { - /* regs to print: 0...8, 21,27,31 */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, - }; - - 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 mpc512x_fec_bd_init (mpc512x_fec_priv *fec) -{ - int ix; - - /* - * Receive BDs init - */ - for (ix = 0; ix < FEC_RBD_NUM; ix++) { - fec->bdBase->rbd[ix].dataPointer = (uint32)&fec->bdBase->recv_frames[ix]; - fec->bdBase->rbd[ix].status = FEC_RBD_EMPTY; - fec->bdBase->rbd[ix].dataLength = 0; - } - - /* - * have the last RBD to close the ring - */ - fec->bdBase->rbd[ix - 1].status |= FEC_RBD_WRAP; - fec->rbdIndex = 0; - - /* - * Trasmit BDs init - */ - for (ix = 0; ix < FEC_TBD_NUM; ix++) { - fec->bdBase->tbd[ix].status = 0; - } - - /* - * Have the last TBD to close the ring - */ - fec->bdBase->tbd[ix - 1].status |= FEC_TBD_WRAP; - - /* - * Initialize some indices - */ - fec->tbdIndex = 0; - fec->usedTbdIndex = 0; - fec->cleanTbdNum = FEC_TBD_NUM; - - return 0; -} - -/********************************************************************/ -static void mpc512x_fec_rbd_clean (mpc512x_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; - - /* - * Increment BD count - */ - fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM; - - /* - * Now, we have an empty RxBD, notify FEC - */ - fec->eth->r_des_active = 0x01000000; /* Descriptor polling active */ -} - -/********************************************************************/ -static void mpc512x_fec_tbd_scrub (mpc512x_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->bdBase->tbd[fec->usedTbdIndex]; - if (pUsedTbd->status & FEC_TBD_READY) { -#if (DEBUG & 0x20) - printf ("Cannot clean TBD %d, in use\n", fec->usedTbdIndex); -#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 mpc512x_fec_set_hwaddr (mpc512x_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 mpc512x_fec_init (struct eth_device *dev, bd_t * bis) -{ - mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv; - -#if (DEBUG & 0x1) - printf ("mpc512x_fec_init... Begin\n"); -#endif - - /* Set interrupt mask register */ - fec->eth->imask = 0x00000000; - - /* Clear FEC-Lite interrupt event register(IEVENT) */ - fec->eth->ievent = 0xffffffff; - - /* Set transmit fifo watermark register(X_WMRK), default = 64 */ - fec->eth->x_wmrk = 0x0; - - /* Set Opcode/Pause Duration Register */ - fec->eth->op_pause = 0x00010020; - - /* Frame length=1522; MII mode */ - fec->eth->r_cntrl = (FEC_MAX_FRAME_LEN << 16) | 0x24; - - /* Half-duplex, heartbeat disabled */ - fec->eth->x_cntrl = 0x00000000; - - /* Enable MIB counters */ - fec->eth->mib_control = 0x0; - - /* Setup recv fifo start and buff size */ - fec->eth->r_fstart = 0x500; - fec->eth->r_buff_size = FEC_BUFFER_SIZE; - - /* Setup BD base addresses */ - fec->eth->r_des_start = (uint32)fec->bdBase->rbd; - fec->eth->x_des_start = (uint32)fec->bdBase->tbd; - - /* DMA Control */ - fec->eth->dma_control = 0xc0000000; - - /* Enable FEC */ - fec->eth->ecntrl |= 0x00000006; - - /* Initilize addresses and status words of BDs */ - mpc512x_fec_bd_init (fec); - - /* Descriptor polling active */ - fec->eth->r_des_active = 0x01000000; - -#if (DEBUG & 0x1) - printf("mpc512x_fec_init... Done \n"); -#endif - return 1; -} - -/********************************************************************/ -int mpc512x_fec_init_phy (struct eth_device *dev, bd_t * bis) -{ - mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv; - const uint8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */ - int timeout = 1; - uint16 phyStatus; - -#if (DEBUG & 0x1) - printf ("mpc512x_fec_init_phy... Begin\n"); -#endif - - /* - * 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->ips_clk / 1000000) / 5) + 1) << 1; - - /* - * 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, 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 = 50000; - 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) - mpc512x_fec_phydump (dev->name); -#endif - -#if (DEBUG & 0x1) - printf ("mpc512x_fec_init_phy... Done \n"); -#endif - return 1; -} - -/********************************************************************/ -static void mpc512x_fec_halt (struct eth_device *dev) -{ - mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv; - int counter = 0xffff; - -#if (DEBUG & 0x2) - if (fec->xcv_type != SEVENWIRE) - mpc512x_fec_phydump (dev->name); -#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 the Ethernet Controller - */ - fec->eth->ecntrl &= 0xfffffffd; - - /* - * 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 -} - -/********************************************************************/ - -static int mpc512x_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. - */ - mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv; - volatile FEC_TBD *pTbd; - -#if (DEBUG & 0x20) - printf("tbd status: 0x%04x\n", fec->tbdBase[fec->tbdIndex].status); -#endif - - /* - * Clear Tx BD ring at first - */ - mpc512x_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->bdBase->tbd[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; - - /* Activate transmit Buffer Descriptor polling */ - fec->eth->x_des_active = 0x01000000; /* Descriptor polling active */ - -#if (DEBUG & 0x8) - printf ( "+" ); -#endif - - fec->cleanTbdNum -= 1; - - /* - * 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 mpc512x_fec_recv (struct eth_device *dev) -{ - /* - * 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) -{ - mpc512x_fec_priv *fec; - struct eth_device *dev; - int i; - char *tmp, *end, env_enetaddr[6]; - 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 - - /* 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 */ |