Patch by TsiChung Liew, 23 Sep 2004:
- add support for MPC8220 CPU
- Add support for Alaska and Yukon boards
diff --git a/cpu/mpc8220/fec.c b/cpu/mpc8220/fec.c
new file mode 100644
index 0000000..1bc51cd
--- /dev/null
+++ b/cpu/mpc8220/fec.c
@@ -0,0 +1,993 @@
+/*
+ * (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 <mpc8220.h>
+#include <malloc.h>
+#include <net.h>
+#include <miiphy.h>
+#include "dma.h"
+#include "fec.h"
+
+#define DEBUG 0
+/*tbd - rtm */
+/*#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
+ defined(CONFIG_MPC8220_FEC)*/
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+
+#if (DEBUG & 0x60)
+static void tfifo_print (mpc8220_fec_priv * fec);
+static void rfifo_print (mpc8220_fec_priv * fec);
+#endif /* DEBUG */
+
+#if (DEBUG & 0x40)
+static u32 local_crc32 (char *string, unsigned int crc_value, int len);
+#endif
+
+typedef struct {
+ u8 data[1500]; /* actual data */
+ int length; /* actual length */
+ int used; /* buffer in use or not */
+ u8 head[16]; /* MAC header(6 + 6 + 2) + 2(aligned) */
+} NBUF;
+
+/********************************************************************/
+#if (DEBUG & 0x2)
+static void mpc8220_fec_phydump (void)
+{
+ u16 phyStatus, i;
+ u8 phyAddr = CONFIG_PHY_ADDR;
+ u8 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 (phyAddr, i, &phyStatus);
+ printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
+ }
+ }
+}
+#endif
+
+/********************************************************************/
+static int mpc8220_fec_rbd_init (mpc8220_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 = (u32) 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 mpc8220_fec_tbd_init (mpc8220_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 mpc8220_fec_rbd_clean (mpc8220_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
+ */
+ DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
+
+ /*
+ * Increment BD count
+ */
+ fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
+}
+
+/********************************************************************/
+static void mpc8220_fec_tbd_scrub (mpc8220_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 mpc8220_fec_set_hwaddr (mpc8220_fec_priv * fec, char *mac)
+{
+ u8 currByte; /* byte for which to compute the CRC */
+ int byte; /* loop - counter */
+ int bit; /* loop - counter */
+ u32 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 mpc8220_fec_init (struct eth_device *dev, bd_t * bis)
+{
+ mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+ struct mpc8220_dma *dma = (struct mpc8220_dma *) MMAP_DMA;
+ const u8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
+
+#if (DEBUG & 0x1)
+ printf ("mpc8220_fec_init... Begin\n");
+#endif
+
+ /*
+ * Initialize RxBD/TxBD rings
+ */
+ mpc8220_fec_rbd_init (fec);
+ mpc8220_fec_tbd_init (fec);
+
+ /*
+ * Set up Pin Muxing for FEC 1
+ */
+ *(vu_long *) MMAP_PCFG = 0;
+ *(vu_long *) (MMAP_PCFG + 4) = 0;
+ /*
+ * 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.
+ */
+ /* tbd - rtm */
+ /*fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); */
+ /* No MII for 7-wire mode */
+ fec->eth->mii_speed = 0x00000030;
+ }
+
+ /*
+ * 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 ("mpc8220_fec_init() RFIFO error\n");
+ }
+#endif
+
+ /*
+ * Set Tx FIFO granularity value
+ */
+ /*fec->eth->tfifo_cntrl = 0x0c000000; */ /*tbd - rtm */
+ fec->eth->tfifo_cntrl = 0x0e000000;
+#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.
+ */
+ mpc8220_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 1
+/*#if defined(CONFIG_MPC5200)*/
+ /*
+ * Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
+ * work w/ the current receive task.
+ */
+ dma->PtdCntrl |= 0x00000001;
+#endif
+
+ /*
+ * Set priority of different initiators
+ */
+ dma->IPR0 = 7; /* always */
+ dma->IPR3 = 6; /* Eth RX */
+ dma->IPR4 = 5; /* Eth Tx */
+
+ /*
+ * Clear SmartDMA task interrupt pending bits
+ */
+ DMA_CLEAR_IEVENT (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;
+ u16 phyStatus;
+
+ /*
+ * Reset PHY, then delay 300ns
+ */
+ miiphy_write (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 (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 */
+
+#if (DEBUG & 0x2)
+ printf ("done.\n");
+#endif
+ } 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 & 0x0004));
+
+#if (DEBUG & 0x2)
+ printf ("PHY auto neg complete! \n");
+#endif
+ }
+
+ }
+
+ /*
+ * Enable FEC-Lite controller
+ */
+ fec->eth->ecntrl |= 0x00000006;
+
+#if (DEBUG & 0x2)
+ if (fec->xcv_type != SEVENWIRE)
+ mpc8220_fec_phydump ();
+#endif
+
+ /*
+ * Enable SmartDMA receive task
+ */
+ DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
+
+#if (DEBUG & 0x1)
+ printf ("mpc8220_fec_init... Done \n");
+#endif
+
+ return 1;
+}
+
+/********************************************************************/
+static void mpc8220_fec_halt (struct eth_device *dev)
+{
+ mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+ int counter = 0xffff;
+
+#if (DEBUG & 0x2)
+ if (fec->xcv_type != SEVENWIRE)
+ mpc8220_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
+ */
+ DMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
+ DMA_TASK_DISABLE (FEC_RECV_TASK_NO);
+
+ /*
+ * 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 (mpc8220_fec_priv * fec)
+{
+ u16 phyAddr = CONFIG_PHY_ADDR;
+ u16 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 (mpc8220_fec_priv * fec)
+{
+ u16 phyAddr = CONFIG_PHY_ADDR;
+ u16 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 mpc8220_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.
+ */
+ mpc8220_fec_priv *fec = (mpc8220_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
+ */
+ mpc8220_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 = (u32) 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 ("DMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
+#endif
+
+ /*
+ * Kick the MII i/f
+ */
+ if (fec->xcv_type != SEVENWIRE) {
+ u16 phyStatus;
+
+ miiphy_read (0, 0x1, &phyStatus);
+ }
+
+ /*
+ * Enable SmartDMA transmit task
+ */
+
+#if (DEBUG & 0x20)
+ tfifo_print (fec);
+#endif
+
+ DMA_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 mpc8220_fec_recv (struct eth_device *dev)
+{
+ /*
+ * This command pulls one frame from the card
+ */
+ mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
+ FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
+ unsigned long ievent;
+ int frame_length, len = 0;
+ NBUF *frame;
+
+#if (DEBUG & 0x1)
+ printf ("mpc8220_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 */
+ mpc8220_fec_halt (dev);
+ mpc8220_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) {
+ mpc8220_fec_halt (dev);
+ fec->eth->x_cntrl &= ~0x00000001;
+ mpc8220_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 (0)
+ {
+ 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 ((volatile uchar *) pRbd->dataPointer,
+ frame_length);
+ len = frame_length;
+ }
+ /*
+ * Reset buffer descriptor as empty
+ */
+ mpc8220_fec_rbd_clean (fec, pRbd);
+ }
+ DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
+ return len;
+}
+
+
+/********************************************************************/
+int mpc8220_fec_initialize (bd_t * bis)
+{
+ mpc8220_fec_priv *fec;
+
+#ifdef CONFIG_ETH1ADDR
+ mpc8220_fec_priv *fec2;
+#endif
+ struct eth_device *dev;
+ char *tmp, *end;
+ char env_enetaddr[6];
+
+#ifdef CONFIG_ETH1ADDR
+ char env_enet1addr[6];
+#endif
+ int i;
+
+ fec = (mpc8220_fec_priv *) malloc (sizeof (*fec));
+ dev = (struct eth_device *) malloc (sizeof (*dev));
+ memset (dev, 0, sizeof *dev);
+
+ fec->eth = (ethernet_regs *) MMAP_FEC1;
+#ifdef CONFIG_ETH1ADDR
+ fec2 = (mpc8220_fec_priv *) malloc (sizeof (*fec));
+ fec2->eth = (ethernet_regs *) MMAP_FEC2;
+#endif
+ fec->tbdBase = (FEC_TBD *) FEC_BD_BASE;
+ fec->rbdBase =
+ (FEC_RBD *) (FEC_BD_BASE + FEC_TBD_NUM * sizeof (FEC_TBD));
+ fec->xcv_type = MII100;
+
+ dev->priv = (void *) fec;
+ dev->iobase = MMAP_FEC1;
+ dev->init = mpc8220_fec_init;
+ dev->halt = mpc8220_fec_halt;
+ dev->send = mpc8220_fec_send;
+ dev->recv = mpc8220_fec_recv;
+
+ sprintf (dev->name, "FEC ETHERNET");
+ eth_register (dev);
+
+ /*
+ * 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;
+ }
+ mpc8220_fec_set_hwaddr (fec, env_enetaddr);
+ }
+#ifdef CONFIG_ETH1ADDR
+ tmp = getenv ("eth1addr");
+ if (tmp) {
+ for (i = 0; i < 6; i++) {
+ env_enet1addr[i] =
+ tmp ? simple_strtoul (tmp, &end, 16) : 0;
+ if (tmp)
+ tmp = (*end) ? end + 1 : end;
+ }
+ mpc8220_fec_set_hwaddr (fec2, env_enet1addr);
+ }
+#endif
+
+ return 1;
+}
+
+/* MII-interface related functions */
+/********************************************************************/
+int miiphy_read (u8 phyAddr, u8 regAddr, u16 * retVal)
+{
+ ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
+ u32 reg; /* convenient holder for the PHY register */
+ u32 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 = (u16) eth->mii_data;
+
+ return 0;
+}
+
+/********************************************************************/
+int miiphy_write (u8 phyAddr, u8 regAddr, u16 data)
+{
+ ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
+ u32 reg; /* convenient holder for the PHY register */
+ u32 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 u32 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_MPC8220_FEC */