Initial revision

1 files changed, 347 insertions, 0 deletions

diff --git a/cpu/mpc8260/ether_fcc.c b/cpu/mpc8260/ether_fcc.c
new file mode 100644
index 000000000..01ddf5ccb
--- /dev/null
+++ b/cpu/mpc8260/ether_fcc.c
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+/*
+ * MPC8260 FCC Fast Ethernet
+ *
+ * Copyright (c) 2000 MontaVista Software, Inc.   Dan Malek (dmalek@jlc.net)
+ *
+ * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * MPC8260 FCC Fast Ethernet
+ * Basic ET HW initialization and packet RX/TX routines
+ *
+ * This code will not perform the IO port configuration. This should be
+ * done in the iop_conf_t structure specific for the board.
+ *
+ * TODO:
+ * add a PHY driver to do the negotiation
+ * reflect negotiation results in FPSMR
+ * look for ways to configure the board specific stuff elsewhere, eg.
+ *    config_xxx.h or the board directory
+ */
+
+#include <common.h>
+#include <asm/cpm_8260.h>
+#include <mpc8260.h>
+#include <net.h>
+#include <command.h>
+#include <config.h>
+
+#if defined(CONFIG_ETHER_ON_FCC) && (CONFIG_COMMANDS & CFG_CMD_NET)
+
+/*---------------------------------------------------------------------*/
+#if (CONFIG_ETHER_INDEX == 1)
+
+#define PROFF_ENET		PROFF_FCC1
+#define CPM_CR_ENET_SBLOCK	CPM_CR_FCC1_SBLOCK
+#define CPM_CR_ENET_SBLOCK	CPM_CR_FCC1_SBLOCK
+#define CPM_CR_ENET_PAGE	CPM_CR_FCC1_PAGE
+
+/*---------------------------------------------------------------------*/
+#elif (CONFIG_ETHER_INDEX == 2)
+
+#define PROFF_ENET		PROFF_FCC2
+#define CPM_CR_ENET_SBLOCK	CPM_CR_FCC2_SBLOCK
+#define CPM_CR_ENET_PAGE	CPM_CR_FCC2_PAGE
+
+/*---------------------------------------------------------------------*/
+#elif (CONFIG_ETHER_INDEX == 3)
+
+#define PROFF_ENET		PROFF_FCC3
+#define CPM_CR_ENET_SBLOCK	CPM_CR_FCC3_SBLOCK
+#define CPM_CR_ENET_PAGE	CPM_CR_FCC3_PAGE
+
+/*---------------------------------------------------------------------*/
+#else
+#error "FCC Ethernet not correctly defined"
+#endif
+/*---------------------------------------------------------------------*/
+
+/* Maximum input DMA size.  Must be a should(?) be a multiple of 4. */
+#define PKT_MAXDMA_SIZE         1520
+
+/* The FCC stores dest/src/type, data, and checksum for receive packets. */
+#define PKT_MAXBUF_SIZE         1518
+#define PKT_MINBUF_SIZE         64
+
+/* Maximum input buffer size.  Must be a multiple of 32. */
+#define PKT_MAXBLR_SIZE         1536
+
+#define TOUT_LOOP 1000000
+
+#define TX_BUF_CNT 2
+#ifdef __GNUC__
+static char txbuf[TX_BUF_CNT][PKT_MAXBLR_SIZE] __attribute__ ((aligned(8)));
+#else
+#error "txbuf must be 64-bit aligned"
+#endif
+
+static uint rxIdx;	/* index of the current RX buffer */
+static uint txIdx;	/* index of the current TX buffer */
+
+/*
+ * FCC Ethernet Tx and Rx buffer descriptors.
+ * Provide for Double Buffering
+ * Note: PKTBUFSRX is defined in net.h
+ */
+
+typedef volatile struct rtxbd {
+    cbd_t rxbd[PKTBUFSRX];
+    cbd_t txbd[TX_BUF_CNT];
+} RTXBD;
+
+/*  Good news: the FCC supports external BDs! */
+#ifdef __GNUC__
+static RTXBD rtx __attribute__ ((aligned(8)));
+#else
+#error "rtx must be 64-bit aligned"
+#endif
+
+int eth_send(volatile void *packet, int length)
+{
+    int i;
+    int result = 0;
+
+    if (length <= 0) {
+	printf("fec: bad packet size: %d\n", length);
+	goto out;
+    }
+
+    for(i=0; rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
+	if (i >= TOUT_LOOP) {
+	    printf("fec: tx buffer not ready\n");
+	    goto out;
+	}
+    }
+
+    rtx.txbd[txIdx].cbd_bufaddr = (uint)packet;
+    rtx.txbd[txIdx].cbd_datlen = length;
+    rtx.txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |
+			       BD_ENET_TX_WRAP);
+
+    for(i=0; rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
+	if (i >= TOUT_LOOP) {
+	    printf("fec: tx error\n");
+	    goto out;
+	}
+    }
+
+#ifdef ET_DEBUG
+    printf("cycles: %d status: %04x\n", i, rtx.txbd[txIdx].cbd_sc);
+#endif
+
+    /* return only status bits */
+    result = rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;
+
+out:
+    return result;
+}
+
+int eth_rx(void)
+{
+    int length;
+
+    for (;;)
+    {
+	if (rtx.rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
+	    length = -1;
+	    break;     /* nothing received - leave for() loop */
+	}
+	length = rtx.rxbd[rxIdx].cbd_datlen;
+
+	if (rtx.rxbd[rxIdx].cbd_sc & 0x003f) {
+	    printf("fec: rx error %04x\n", rtx.rxbd[rxIdx].cbd_sc);
+	}
+	else {
+	    /* Pass the packet up to the protocol layers. */
+	    NetReceive(NetRxPackets[rxIdx], length - 4);
+	}
+
+
+	/* Give the buffer back to the FCC. */
+	rtx.rxbd[rxIdx].cbd_datlen = 0;
+
+	/* wrap around buffer index when necessary */
+	if ((rxIdx + 1) >= PKTBUFSRX) {
+	    rtx.rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
+	    rxIdx = 0;
+	}
+	else {
+	    rtx.rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
+	    rxIdx++;
+	}
+    }
+    return length;
+}
+
+
+int eth_init(bd_t *bis)
+{
+    int i;
+    volatile immap_t *immr = (immap_t *)CFG_IMMR;
+    volatile cpm8260_t *cp = &(immr->im_cpm);
+    fcc_enet_t *pram_ptr;
+    unsigned long mem_addr;
+
+#if 0
+    mii_discover_phy();
+#endif
+
+    /* 28.9 - (1-2): ioports have been set up already */
+
+    /* 28.9 - (3): connect FCC's tx and rx clocks */
+    immr->im_cpmux.cmx_uar = 0;
+    immr->im_cpmux.cmx_fcr = (immr->im_cpmux.cmx_fcr & ~CFG_CMXFCR_MASK) |
+    							CFG_CMXFCR_VALUE;
+
+    /* 28.9 - (4): GFMR: disable tx/rx, CCITT CRC, Mode Ethernet */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_gfmr =
+      FCC_GFMR_MODE_ENET | FCC_GFMR_TCRC_32;
+
+    /* 28.9 - (5): FPSMR: enable full duplex, select CCITT CRC for Ethernet */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_fpsmr = CFG_FCC_PSMR | FCC_PSMR_ENCRC;
+
+    /* 28.9 - (6): FDSR: Ethernet Syn */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_fdsr = 0xD555;
+
+    /* reset indeces to current rx/tx bd (see eth_send()/eth_rx()) */
+    rxIdx = 0;
+    txIdx = 0;
+
+    /* Setup Receiver Buffer Descriptors */
+    for (i = 0; i < PKTBUFSRX; i++)
+    {
+      rtx.rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
+      rtx.rxbd[i].cbd_datlen = 0;
+      rtx.rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
+    }
+    rtx.rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
+
+    /* Setup Ethernet Transmitter Buffer Descriptors */
+    for (i = 0; i < TX_BUF_CNT; i++)
+    {
+      rtx.txbd[i].cbd_sc = (BD_ENET_TX_PAD | BD_ENET_TX_LAST | BD_ENET_TX_TC);
+      rtx.txbd[i].cbd_datlen = 0;
+      rtx.txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
+    }
+    rtx.txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
+
+    /* 28.9 - (7): initialise parameter ram */
+    pram_ptr = (fcc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
+
+    /* clear whole structure to make sure all reserved fields are zero */
+    memset((void*)pram_ptr, 0, sizeof(fcc_enet_t));
+
+    /*
+     * common Parameter RAM area
+     *
+     * Allocate space in the reserved FCC area of DPRAM for the
+     * internal buffers.  No one uses this space (yet), so we
+     * can do this.  Later, we will add resource management for
+     * this area.
+     */
+    mem_addr = CPM_FCC_SPECIAL_BASE + ((CONFIG_ETHER_INDEX-1) * 64);
+    pram_ptr->fen_genfcc.fcc_riptr = mem_addr;
+    pram_ptr->fen_genfcc.fcc_tiptr = mem_addr+32;
+    /*
+     * Set maximum bytes per receive buffer.
+     * It must be a multiple of 32.
+     */
+    pram_ptr->fen_genfcc.fcc_mrblr = PKT_MAXBLR_SIZE;
+    pram_ptr->fen_genfcc.fcc_rstate = (CPMFCR_GBL | CPMFCR_EB |
+				       CFG_CPMFCR_RAMTYPE) << 24;
+    pram_ptr->fen_genfcc.fcc_rbase = (unsigned int)(&rtx.rxbd[rxIdx]);
+    pram_ptr->fen_genfcc.fcc_tstate = (CPMFCR_GBL | CPMFCR_EB |
+				       CFG_CPMFCR_RAMTYPE) << 24;
+    pram_ptr->fen_genfcc.fcc_tbase = (unsigned int)(&rtx.txbd[txIdx]);
+
+    /* protocol-specific area */
+    pram_ptr->fen_cmask = 0xdebb20e3;	/* CRC mask */
+    pram_ptr->fen_cpres = 0xffffffff;	/* CRC preset */
+    pram_ptr->fen_retlim = 15;		/* Retry limit threshold */
+    pram_ptr->fen_mflr = PKT_MAXBUF_SIZE;   /* maximum frame length register */
+    /*
+     * Set Ethernet station address.
+     *
+     * This is supplied in the board information structure, so we
+     * copy that into the controller.
+     * So, far we have only been given one Ethernet address. We make
+     * it unique by setting a few bits in the upper byte of the
+     * non-static part of the address.
+     */
+#define ea bis->bi_enetaddr
+    pram_ptr->fen_paddrh = (ea[5] << 8) + ea[4];
+    pram_ptr->fen_paddrm = (ea[3] << 8) + ea[2];
+    pram_ptr->fen_paddrl = (ea[1] << 8) + ea[0];
+#undef ea
+    pram_ptr->fen_minflr = PKT_MINBUF_SIZE; /* minimum frame length register */
+    /* pad pointer. use tiptr since we don't need a specific padding char */
+    pram_ptr->fen_padptr = pram_ptr->fen_genfcc.fcc_tiptr;
+    pram_ptr->fen_maxd1 = PKT_MAXDMA_SIZE;	/* maximum DMA1 length */
+    pram_ptr->fen_maxd2 = PKT_MAXDMA_SIZE;	/* maximum DMA2 length */
+    pram_ptr->fen_rfthr = 1;
+    pram_ptr->fen_rfcnt = 1;
+#if 0
+    printf("pram_ptr->fen_genfcc.fcc_rbase %08lx\n",
+	pram_ptr->fen_genfcc.fcc_rbase);
+    printf("pram_ptr->fen_genfcc.fcc_tbase %08lx\n",
+	pram_ptr->fen_genfcc.fcc_tbase);
+#endif
+
+    /* 28.9 - (8): clear out events in FCCE */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_fcce = ~0x0;
+
+    /* 28.9 - (9): FCCM: mask all events */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_fccm = 0;
+
+    /* 28.9 - (10-12): we don't use ethernet interrupts */
+
+    /* 28.9 - (13)
+     *
+     * Let's re-initialize the channel now.  We have to do it later
+     * than the manual describes because we have just now finished
+     * the BD initialization.
+     */
+    cp->cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
+			    CPM_CR_ENET_SBLOCK,
+			    0x0c,
+			    CPM_CR_INIT_TRX) | CPM_CR_FLG;
+    do {
+	__asm__ __volatile__ ("eieio");
+    } while (cp->cp_cpcr & CPM_CR_FLG);
+
+    /* 28.9 - (14): enable tx/rx in gfmr */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_gfmr |= FCC_GFMR_ENT | FCC_GFMR_ENR;
+
+    return 1;
+}
+
+void eth_halt(void)
+{
+    volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+    /* write GFMR: disable tx/rx */
+    immr->im_fcc[CONFIG_ETHER_INDEX-1].fcc_gfmr &=
+						~(FCC_GFMR_ENT | FCC_GFMR_ENR);
+}
+
+#endif	/* CONFIG_ETHER_ON_FCC && CFG_CMD_NET */