import Chuck Cranor's ATM driver

1 files changed, 348 insertions, 0 deletions

diff --git a/sys/dev/en/if_en_pci.c b/sys/dev/en/if_en_pci.c
new file mode 100644
index 0000000..8f466ff
--- /dev/null
+++ b/sys/dev/en/if_en_pci.c
@@ -0,0 +1,348 @@
+/*	$NetBSD: if_en_pci.c,v 1.1 1996/06/22 02:00:31 chuck Exp $	*/
+
+/*
+ *
+ * Copyright (c) 1996 Charles D. Cranor and Washington University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Charles D. Cranor and
+ *	Washington University.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ *
+ * i f _ e n _ p c i . c  
+ *
+ * author: Chuck Cranor <chuck@ccrc.wustl.edu>
+ * started: spring, 1996.
+ *
+ * FreeBSD PCI glue for the eni155p card.
+ * thanks to Matt Thomas for figuring out FreeBSD vs NetBSD vs etc.. diffs.
+ */
+
+#include "en.h"
+#include "pci.h"
+#if (NEN > 0) && (NPCI > 0)
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#ifndef SHUTDOWN_PRE_SYNC
+/*
+ * device shutdown mechanism has been changed since 2.2-ALPHA.
+ * if SHUTDOWN_PRE_SYNC is defined in "sys/systm.h", use new one.
+ * otherwise, use old one.
+ *	new: 2.2-ALPHA, 2.2-BETA, 2.2-GAMME, 2.2-RELEASE, 3.0
+ *	old: 2.1.5, 2.1.6, 2.2-SNAP
+ *			-- kjc
+ */
+#include <sys/devconf.h>
+#endif
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+
+#include <machine/cpufunc.h>		/* for rdtsc proto for clock.h below */
+#include <machine/clock.h>		/* for DELAY */
+
+#include <net/if.h>
+
+#include <pci/pcivar.h>
+#include <pci/pcireg.h>
+
+#include <dev/en/midwayreg.h>
+#include <dev/en/midwayvar.h>
+
+
+/*
+ * prototypes
+ */
+
+static	void en_pci_attach __P((pcici_t, int));
+static	char *en_pci_probe __P((pcici_t, pcidi_t));
+#ifdef SHUTDOWN_PRE_SYNC
+static void en_pci_shutdown __P((int, void *));
+#else
+static	int en_pci_shutdown __P((struct kern_devconf *, int));
+#endif
+
+/*
+ * local structures
+ */
+
+struct en_pci_softc {
+  /* bus independent stuff */
+  struct en_softc esc;		/* includes "device" structure */
+
+  /* PCI bus glue */
+  void *sc_ih;			/* interrupt handle */
+  pci_chipset_tag_t en_pc;	/* for PCI calls */
+
+};
+
+/*
+ * pointers to softcs (we alloc)
+ */
+
+static struct en_pci_softc *enpcis[NEN] = {0};
+extern struct cfdriver en_cd;
+
+/*
+ * autoconfig structures
+ */
+
+static u_long en_pci_count;
+
+static struct pci_device endevice = {
+	"en",
+	en_pci_probe,
+	en_pci_attach,
+	&en_pci_count,
+#ifdef SHUTDOWN_PRE_SYNC
+	NULL,
+#else
+	en_pci_shutdown,
+#endif
+};  
+
+DATA_SET (pcidevice_set, endevice);
+
+/*
+ * local defines (PCI specific stuff)
+ */
+
+/* 
+ * address of config base memory address register in PCI config space
+ * (this is card specific)
+ */
+        
+#define PCI_CBMA        0x10
+
+/*
+ * tonga (pci bridge).   ENI cards only!
+ */
+
+#define EN_TONGA        0x60            /* PCI config addr of tonga reg */
+
+#define TONGA_SWAP_DMA  0x80            /* endian swap control */
+#define TONGA_SWAP_BYTE 0x40
+#define TONGA_SWAP_WORD 0x20
+
+/*
+ * adaptec pci bridge.   ADP cards only!
+ */
+
+#define ADP_PCIREG      0x050040        /* PCI control register */
+
+#define ADP_PCIREG_RESET        0x1     /* reset card */
+#define ADP_PCIREG_IENABLE	0x2	/* interrupt enable */
+#define ADP_PCIREG_SWAP_WORD	0x4	/* swap byte on slave access */
+#define ADP_PCIREG_SWAP_DMA	0x8	/* swap byte on DMA */
+
+#define PCI_VENDOR_EFFICIENTNETS 0x111a			/* Efficent Networks */
+#define PCI_PRODUCT_EFFICIENTNETS_ENI155PF 0x0000	/* ENI-155P ATM */
+#define PCI_PRODUCT_EFFICIENTNETS_ENI155PA 0x0002	/* ENI-155P ATM */
+#define PCI_VENDOR_ADP 0x9004				/* adaptec */
+#define PCI_PRODUCT_ADP_AIC5900 0x5900
+#define PCI_PRODUCT_ADP_AIC5905 0x5905
+#define PCI_VENDOR(x)		((x) & 0xFFFF)
+#define PCI_CHIPID(x)		(((x) >> 16) & 0xFFFF)
+
+#if !defined(MIDWAY_ENIONLY)
+
+static void adp_busreset __P((void *));
+
+/*
+ * bus specific reset function [ADP only!]
+ */
+
+static void adp_busreset(v)
+
+void *v;
+
+{
+  struct en_softc *sc = (struct en_softc *) v;
+  u_int32_t dummy;
+
+  bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, ADP_PCIREG_RESET);
+  DELAY(1000);  /* let it reset */
+  dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
+  bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, 
+		(ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA|ADP_PCIREG_IENABLE));
+  dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
+  if ((dummy & (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA)) !=
+		(ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA))
+    printf("adp_busreset: Adaptec ATM did NOT reset!\n");
+}
+#endif
+
+/***********************************************************************/
+
+/*
+ * autoconfig stuff
+ */
+
+static char *en_pci_probe(config_id, device_id)
+
+pcici_t config_id;
+pcidi_t device_id;
+
+{
+#if !defined(MIDWAY_ADPONLY)
+  if (PCI_VENDOR(device_id) == PCI_VENDOR_EFFICIENTNETS && 
+      (PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PF ||
+       PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PA))
+    return "Efficient Networks ENI-155p";
+#endif
+
+#if !defined(MIDWAY_ENIONLY)
+  if (PCI_VENDOR(device_id) == PCI_VENDOR_ADP && 
+      (PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5900 ||
+       PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5905))
+    return "Adaptec 155 ATM";
+#endif
+
+  return 0;
+}
+
+static void en_pci_attach(config_id, unit)
+
+pcici_t config_id;
+int unit;
+
+{
+  struct en_softc *sc;
+  struct en_pci_softc *scp;
+  pcidi_t device_id;
+  int retval;
+  vm_offset_t pa;
+
+  if (unit >= NEN) {
+    printf("en%d: not configured; kernel is built for only %d device%s.\n",
+	unit, NEN, NEN == 1 ? "" : "s");
+    return;
+  }
+
+  scp = (struct en_pci_softc *) malloc(sizeof(*scp), M_DEVBUF, M_NOWAIT);
+  if (scp == NULL)
+    return;
+  bzero(scp, sizeof(*scp));		/* zero */
+  sc = &scp->esc;
+
+  retval = pci_map_mem(config_id, PCI_CBMA, (vm_offset_t *) &sc->en_base, &pa);
+
+  if (!retval) {
+    free((caddr_t) scp, M_DEVBUF);
+    return;
+  }
+  enpcis[unit] = scp;			/* lock it in */
+  en_cd.cd_devs[unit] = sc;		/* fake a cfdriver structure */
+  en_cd.cd_ndevs = NEN;
+  sprintf(sc->sc_dev.dv_xname, "en%d", unit);
+  sc->enif.if_unit = unit;
+  sc->enif.if_name = "en";
+
+  /*
+   * figure out if we are an adaptec card or not.
+   * XXX: why do we have to re-read PC_ID_REG when en_pci_probe already
+   * had that info?
+   */
+
+  device_id = pci_conf_read(config_id, PCI_ID_REG);
+  sc->is_adaptec = (PCI_VENDOR(device_id) == PCI_VENDOR_ADP) ? 1 : 0;
+  
+#ifdef SHUTDOWN_PRE_SYNC
+  /*
+   * Add shutdown hook so that DMA is disabled prior to reboot. Not
+   * doing so could allow DMA to corrupt kernel memory during the
+   * reboot before the driver initializes.
+   */
+  at_shutdown(en_pci_shutdown, scp, SHUTDOWN_POST_SYNC);
+#endif
+
+  if (!pci_map_int(config_id, en_intr, (void *) sc, &net_imask)) {
+    printf("%s: couldn't establish interrupt\n", sc->sc_dev.dv_xname);
+    return;
+  }
+  sc->ipl = 1; /* XXX */
+
+  /*
+   * set up pci bridge
+   */
+
+#if !defined(MIDWAY_ENIONLY)
+  if (sc->is_adaptec) {
+    sc->en_busreset = adp_busreset;
+    adp_busreset(sc);
+  }
+#endif
+
+#if !defined(MIDWAY_ADPONLY)
+  if (!sc->is_adaptec) {
+    sc->en_busreset = NULL;
+    pci_conf_write(config_id, EN_TONGA, (TONGA_SWAP_DMA|TONGA_SWAP_WORD));
+  }
+#endif
+
+  /*
+   * done PCI specific stuff
+   */
+
+  en_attach(sc);
+
+}
+
+#ifdef SHUTDOWN_PRE_SYNC
+static void
+en_pci_shutdown(
+	int howto,
+	void *sc)
+{
+    struct en_pci_softc *psc = (struct en_pci_softc *)sc;
+    
+    en_reset(&psc->esc);
+    DELAY(10);
+}
+#else  /* !SHUTDOWN_PRE_SYNC */
+static int
+en_pci_shutdown(kdc, force)
+
+struct kern_devconf *kdc;
+int force;
+
+{
+  if (kdc->kdc_unit < NEN) {
+    struct en_pci_softc *psc = enpcis[kdc->kdc_unit];
+    if (psc)			/* can it be null? */
+      en_reset(&psc->esc);
+    DELAY(10);
+  }
+  dev_detach(kdc);
+  return(0);
+}
+#endif /* !SHUTDOWN_PRE_SYNC */
+#endif /* NEN > 0 && NPCI > 0 */