--- /dev/null
+/*
+ * (C) Copyright 2008
+ * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
+ *
+ * Based in part on cpu/mpc8260/ether_scc.c.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+
+#ifdef CONFIG_KEYMILE_HDLC_ENET
+
+#include "../common/keymile_hdlc_enet.h"
+
+char keymile_slot; /* our slot number in the backplane */
+
+/*
+ * Since, except during initialization, ethact is always HDLC ETHERNET
+ * while we're in the driver, just use serial_printf() everywhere for
+ * output. This avoids possible conflicts when netconsole is being
+ * used.
+ */
+#define dprintf(fmt, args...) serial_printf(fmt, ##args)
+
+static int already_inited;
+
+/*
+ * SCC Ethernet Tx and Rx buffer descriptors allocated at the
+ * immr->udata_bd address on Dual-Port RAM
+ * Provide for Double Buffering
+ */
+typedef volatile struct CommonBufferDescriptor {
+ cbd_t txbd; /* Tx BD */
+ cbd_t rxbd[HDLC_PKTBUFSRX]; /* Rx BD */
+} RTXBD;
+
+static RTXBD *rtx;
+
+int keymile_hdlc_enet_init(struct eth_device *, bd_t *);
+void keymile_hdlc_enet_halt(struct eth_device *);
+extern void keymile_hdlc_enet_init_bds(RTXBD *);
+extern void initCachedNumbers(int);
+
+/* Use SCC1 */
+#define CPM_CR_SCC_PAGE CPM_CR_SCC1_PAGE
+#define CPM_CR_SCC_SBLOCK CPM_CR_SCC1_SBLOCK
+#define CMXSCR_MASK (CMXSCR_GR1|CMXSCR_SC1|\
+ CMXSCR_RS1CS_MSK|CMXSCR_TS1CS_MSK)
+#define CMXSCR_VALUE (CMXSCR_RS1CS_CLK11|CMXSCR_TS1CS_CLK11)
+#define MGC_PROFF_HDLC PROFF_SCC1
+#define MGC_SCC_HDLC 0 /* Index, not number! */
+
+int keymile_hdlc_enet_init(struct eth_device *dev, bd_t *bis)
+{
+ /* int i; */
+ uint dpr;
+ /* volatile cbd_t *bdp; */
+ volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
+ volatile cpm8260_t *cp = &(im->im_cpm);
+ volatile scc_t *sccp;
+ volatile scc_hdlc_t *hpr;
+ volatile iop8260_t *iop;
+
+ if (already_inited)
+ return 0;
+
+ hpr = (scc_hdlc_t *)(&im->im_dprambase[MGC_PROFF_HDLC]);
+ sccp = (scc_t *)(&im->im_scc[MGC_SCC_HDLC]);
+ iop = &im->im_ioport;
+
+ /*
+ * Disable receive and transmit just in case.
+ */
+ sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+
+ /*
+ * Avoid exhausting DPRAM, which would cause a panic.
+ */
+ if (rtx == NULL) {
+ /* dpr is an offset into dpram */
+ dpr = m8260_cpm_dpalloc(sizeof(RTXBD), 8);
+ rtx = (RTXBD *)&im->im_dprambase[dpr];
+ }
+
+ /* We need the slot number for addressing. */
+ keymile_slot = *(char *)(CONFIG_SYS_SLOT_ID_BASE +
+ CONFIG_SYS_SLOT_ID_OFF) & CONFIG_SYS_SLOT_ID_MASK;
+ /*
+ * Be consistent with the Linux driver and set
+ * only enetaddr[0].
+ *
+ * Always add 1 to the slot number so that
+ * there are no problems with an ethaddr which
+ * is all 0s. This should be acceptable because
+ * a board should never have a slot number of 255,
+ * which is the broadcast address. The HDLC addressing
+ * uses only the slot number.
+ */
+ dev->enetaddr[0] = keymile_slot + 1;
+#ifdef TEST_IT
+ dprintf("slot %d\n", keymile_slot);
+#endif
+
+ /* use pd30, pd31 pins for TXD1, RXD1 respectively */
+ iop->iop_ppard |= (0x80000000 >> 30) | (0x80000000 >> 31);
+ iop->iop_pdird |= (0x80000000 >> 30);
+ iop->iop_psord |= (0x80000000 >> 30);
+
+ /* use pc21 as CLK11 */
+ iop->iop_pparc |= (0x80000000 >> 21);
+ iop->iop_pdirc &= ~(0x80000000 >> 21);
+ iop->iop_psorc &= ~(0x80000000 >> 21);
+
+ /* use pc15 as CTS1 */
+ iop->iop_pparc |= (0x80000000 >> 15);
+ iop->iop_pdirc &= ~(0x80000000 >> 15);
+ iop->iop_psorc &= ~(0x80000000 >> 15);
+
+ /*
+ * SI clock routing
+ * use CLK11
+ * this also connects SCC1 to NMSI
+ */
+ im->im_cpmux.cmx_scr = (im->im_cpmux.cmx_scr & ~CMXSCR_MASK) |
+ CMXSCR_VALUE;
+
+ /* keymile_rxIdx = 0; */
+
+ /*
+ * Initialize function code registers for big-endian.
+ */
+ hpr->sh_genscc.scc_rfcr = CPMFCR_EB;
+ hpr->sh_genscc.scc_tfcr = CPMFCR_EB;
+
+ /*
+ * Set maximum bytes per receive buffer.
+ */
+ hpr->sh_genscc.scc_mrblr = MAX_FRAME_LENGTH;
+
+ /* Setup CRC generator values for HDLC */
+ hpr->sh_cmask = 0x0000F0B8;
+ hpr->sh_cpres = 0x0000FFFF;
+
+ /* Initialize all error counters to 0 */
+ hpr->sh_disfc = 0;
+ hpr->sh_crcec = 0;
+ hpr->sh_abtsc = 0;
+ hpr->sh_nmarc = 0;
+ hpr->sh_retrc = 0;
+
+ /* Set maximum frame length size */
+ hpr->sh_mflr = MAX_FRAME_LENGTH;
+
+ /* set to 1 for per frame processing change later if needed */
+ hpr->sh_rfthr = 1;
+
+ hpr->sh_hmask = 0xff;
+
+ hpr->sh_haddr2 = SET_HDLC_UUA(keymile_slot);
+ hpr->sh_haddr3 = hpr->sh_haddr2;
+ hpr->sh_haddr4 = hpr->sh_haddr2;
+ /* broadcast */
+ hpr->sh_haddr1 = HDLC_BCAST;
+
+ hpr->sh_genscc.scc_rbase = (unsigned int) &rtx->rxbd[0];
+ hpr->sh_genscc.scc_tbase = (unsigned int) &rtx->txbd;
+
+#if 0
+ /*
+ * Initialize the buffer descriptors.
+ */
+ bdp = &rtx->txbd;
+ bdp->cbd_sc = 0;
+ bdp->cbd_bufaddr = 0;
+ bdp->cbd_sc = BD_SC_WRAP;
+
+ /*
+ * Setup RX packet buffers, aligned correctly.
+ * Borrowed from net/net.c.
+ */
+ MyRxPackets[0] = &MyPktBuf[0] + (PKTALIGN - 1);
+ MyRxPackets[0] -= (ulong)MyRxPackets[0] % PKTALIGN;
+ for (i = 1; i < HDLC_PKTBUFSRX; i++)
+ MyRxPackets[i] = MyRxPackets[0] + i * PKT_MAXBLR_SIZE;
+
+ bdp = &rtx->rxbd[0];
+ for (i = 0; i < HDLC_PKTBUFSRX; i++) {
+ bdp->cbd_sc = BD_SC_EMPTY;
+ /* Leave space at the start for INET header. */
+ bdp->cbd_bufaddr = (unsigned int)(MyRxPackets[i] +
+ INET_HDR_ALIGN);
+ bdp++;
+ }
+ bdp--;
+ bdp->cbd_sc |= BD_SC_WRAP;
+#else
+ keymile_hdlc_enet_init_bds(rtx);
+#endif
+
+ /* 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_SCC_PAGE, CPM_CR_SCC_SBLOCK,
+ 0, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+ while (cp->cp_cpcr & CPM_CR_FLG);
+
+ sccp->scc_gsmrl = SCC_GSMRL_MODE_HDLC;
+ /* CTSS=1 */
+ sccp->scc_gsmrh = SCC_GSMRH_CTSS;
+ /* NOF=0, RTE=1, DRT=0, BUS=1 */
+ sccp->scc_psmr = ((0x8000 >> 6) | (0x8000 >> 10));
+
+/* loopback for local testing */
+#ifdef GJTEST
+ dprintf("LOOPBACK!\n");
+ sccp->scc_gsmrl |= SCC_GSMRL_DIAG_LOOP;
+#endif
+
+ /*
+ * Disable all interrupts and clear all pending
+ * events.
+ */
+ sccp->scc_sccm = 0;
+ sccp->scc_scce = 0xffff;
+
+ /*
+ * And last, enable the transmit and receive processing.
+ */
+ sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+
+ dprintf("%s: HDLC ENET Version 0.3 on SCC%d\n", dev->name,
+ MGC_SCC_HDLC + 1);
+
+ /*
+ * We may not get an ARP packet because ARP was already done on
+ * a different interface, so initialize the cached values now.
+ */
+ initCachedNumbers(1);
+
+ already_inited = 1;
+
+ return 0;
+}
+
+void keymile_hdlc_enet_halt(struct eth_device *dev)
+{
+#if 0 /* just return, but keep this for reference */
+ volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+
+ /* maybe should do a graceful stop here? */
+ immr->im_scc[MGC_SCC_HDLC].scc_gsmrl &=
+ ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+#endif
+}
+
+#endif /* CONFIG_MGCOGE_HDLC_ENET */
projects / u-boot.git / commitdiff