From aace975de13fdd71472fd4aaeddb866d37b885e7 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@bnl.gov>
Date: Sat, 20 Jun 2015 09:05:28 -0400
Subject: [PATCH] RTEMS: probe for PCI varient of NE2000 NIC

Provided by QEMU
---
 src/libCom/RTEMS/Makefile          |  4 +++
 src/libCom/RTEMS/ne2kpci.c         | 58 ++++++++++++++++++++++++++++++
 src/libCom/RTEMS/rtems_netconfig.c | 10 +++++-
 3 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 src/libCom/RTEMS/ne2kpci.c

diff --git a/src/libCom/RTEMS/Makefile b/src/libCom/RTEMS/Makefile
index 8652c669b..8d467b260 100644
--- a/src/libCom/RTEMS/Makefile
+++ b/src/libCom/RTEMS/Makefile
@@ -21,6 +21,10 @@ rtemsCom_SRCS += epicsRtemsInitHookPre.c
 rtemsCom_SRCS += epicsRtemsInitHookPost.c
 rtemsCom_SRCS += epicsMemFs.c
 
+ifeq ($(T_A),RTEMS-pc386)
+rtemsCom_SRCS += ne2kpci.c
+endif
+
 LIBRARY_RTEMS = rtemsCom
 
 include $(TOP)/configure/RULES
diff --git a/src/libCom/RTEMS/ne2kpci.c b/src/libCom/RTEMS/ne2kpci.c
new file mode 100644
index 000000000..909d885f1
--- /dev/null
+++ b/src/libCom/RTEMS/ne2kpci.c
@@ -0,0 +1,58 @@
+/*************************************************************************\
+* Copyright (c) 2015 Brookhaven Science Associates, as Operator of
+*     Brookhaven National Laboratory.
+* EPICS BASE is distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution.
+\*************************************************************************/
+/*
+ * Wrapper around the ISA ne2000 driver to support detection of the PCI variant.
+ * Can be used with the ne2k_pci device provided by QEMU.
+ *
+ * eg. "qemu-system-i386 ... -net nic,model=ne2k_pci"
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <bsp.h>
+#include <rtems/pci.h>
+#include <rtems/rtems_bsdnet.h>
+
+/* The plain ISA driver attach()
+ * which doesn't (can't?) do any test to see if
+ * the HW is really present
+ */
+extern int
+rtems_ne_driver_attach (struct rtems_bsdnet_ifconfig *config, int attach);
+
+int
+rtems_ne2kpci_driver_attach (struct rtems_bsdnet_ifconfig *config, int attach)
+{
+    uint8_t  irq;
+    uint32_t bar0;
+    int B, D, F, ret;
+    printk("Probing for NE2000 on PCI (aka. Realtek 8029)\n");
+
+    if(pci_find_device(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8029, 0, &B, &D, &F))
+    {
+        printk("Not found\n");
+        return 0;
+    }
+
+    printk("Found %d:%d.%d\n", B, D, F);
+
+    ret = pci_read_config_dword(B, D, F, PCI_BASE_ADDRESS_0, &bar0);
+    ret|= pci_read_config_byte(B, D, F, PCI_INTERRUPT_LINE, &irq);
+
+    if(ret || (bar0&PCI_BASE_ADDRESS_SPACE)!=PCI_BASE_ADDRESS_SPACE_IO)
+    {
+        printk("Failed reading card config\n");
+        return 0;
+    }
+
+    config->irno = irq;
+    config->port = bar0&PCI_BASE_ADDRESS_IO_MASK;
+
+    printk("Using port=0x%x irq=%u\n", (unsigned)config->port, config->irno);
+
+    return rtems_ne_driver_attach(config, attach);
+}
diff --git a/src/libCom/RTEMS/rtems_netconfig.c b/src/libCom/RTEMS/rtems_netconfig.c
index 832a6646b..d0c500c92 100644
--- a/src/libCom/RTEMS/rtems_netconfig.c
+++ b/src/libCom/RTEMS/rtems_netconfig.c
@@ -36,11 +36,19 @@ static struct rtems_bsdnet_ifconfig loopback_config = {
  * application directory and make the appropriate changes.
  */
 #if defined(__i386__)
+
+extern int
+rtems_ne2kpci_driver_attach (struct rtems_bsdnet_ifconfig *config, int attach);
+static struct rtems_bsdnet_ifconfig ne2k_driver_config = {
+    "ne2",                             /* name */
+    rtems_ne2kpci_driver_attach,       /* attach function */
+    &loopback_config,                   /* link to next interface */
+};
 extern int rtems_fxp_attach (struct rtems_bsdnet_ifconfig *, int);
 static struct rtems_bsdnet_ifconfig fxp_driver_config = {
     "fxp1",                             /* name */
     rtems_fxp_attach,                   /* attach function */
-    &loopback_config,                   /* link to next interface */
+    &ne2k_driver_config,                /* link to next interface */
 };
 extern int rtems_3c509_driver_attach (struct rtems_bsdnet_ifconfig *, int);
 static struct rtems_bsdnet_ifconfig e3c509_driver_config = {