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-rw-r--r--cpu/mpc512x/fec.c801
1 files changed, 801 insertions, 0 deletions
diff --git a/cpu/mpc512x/fec.c b/cpu/mpc512x/fec.c
new file mode 100644
index 0000000..1c87a53
--- /dev/null
+++ b/cpu/mpc512x/fec.c
@@ -0,0 +1,801 @@
+/*
+ * (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 (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
+ defined(CONFIG_MPC512x_FEC)
+
+#if !(defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_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);
+
+/********************************************************************/
+#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=1518; MII mode */
+ fec->eth->r_cntrl = 0x05ee000c;
+
+ /* 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 = 0x5e0;
+
+ /* 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->ipb_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, len = 0;
+ uchar buff[FEC_MAX_PKT_SIZE];
+
+#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_LAST) &&
+ !(pRbd->status & FEC_RBD_ERR) &&
+ ((pRbd->dataLength - 4) > 14)) {
+
+ /*
+ * Get buffer size
+ */
+ frame_length = pRbd->dataLength - 4;
+
+#if (DEBUG & 0x20)
+ {
+ int i;
+ printf ("recv data hdr:");
+ 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 (buff, (void*)pRbd->dataPointer, frame_length);
+ NetReceive ((uchar*)buff, frame_length);
+ len = frame_length;
+ }
+
+ /*
+ * 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 len;
+}
+
+/********************************************************************/
+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) || (CONFIG_COMMANDS & CFG_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 */
generated by cgit v1.1 at 2024-11-25 00:38:27 +0000