Add PCI support to eNET board

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

3 files changed, 103 insertions, 7 deletions

diff --git a/board/eNET/Makefile b/board/eNET/Makefile
index bf5736a..588d21d 100644
--- a/board/eNET/Makefile
+++ b/board/eNET/Makefile
@@ -32,6 +32,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(BOARD).a
 
 COBJS-y	+= eNET.o
+COBJS-$(CONFIG_PCI) += eNET_pci.o
 SOBJS-y	+= eNET_start16.o
 SOBJS-y	+= eNET_start.o
 
diff --git a/board/eNET/eNET_pci.c b/board/eNET/eNET_pci.c
new file mode 100644
index 0000000..e80a8fe
--- /dev/null
+++ b/board/eNET/eNET_pci.c
@@ -0,0 +1,95 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
+ *
+ * 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 <pci.h>
+#include <asm/pci.h>
+#include <asm/ic/pci.h>
+
+static void pci_enet_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
+{
+	/* a configurable lists of IRQs to steal when we need one */
+	static int irq_list[] = {
+		CONFIG_SYS_FIRST_PCI_IRQ,
+		CONFIG_SYS_SECOND_PCI_IRQ,
+		CONFIG_SYS_THIRD_PCI_IRQ,
+		CONFIG_SYS_FORTH_PCI_IRQ
+	};
+	static int next_irq_index=0;
+
+	uchar tmp_pin;
+	int pin;
+
+	pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
+	pin = tmp_pin;
+
+	pin -= 1; /* PCI config space use 1-based numbering */
+	if (pin == -1) {
+		return; /* device use no irq */
+	}
+
+	/* map device number +  pin to a pin on the sc520 */
+	switch (PCI_DEV(dev)) {
+	case 12:	/* First Ethernet Chip */
+		pin += SC520_PCI_INTA;
+		break;
+
+	case 13:	/* Second Ethernet Chip */
+		pin += SC520_PCI_INTB;
+		break;
+
+	default:
+		return;
+	}
+
+	pin &= 3; /* wrap around */
+
+	if (sc520_pci_ints[pin] == -1) {
+		/* re-route one interrupt for us */
+		if (next_irq_index > 3) {
+			return;
+		}
+		if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
+			return;
+		}
+		next_irq_index++;
+	}
+
+	if (-1 != sc520_pci_ints[pin]) {
+	pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
+					   sc520_pci_ints[pin]);
+	}
+	printf("fixup_irq: device %d pin %c irq %d\n",
+	       PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
+}
+
+static struct pci_controller enet_hose = {
+	fixup_irq: pci_enet_fixup_irq,
+};
+
+void pci_init_board(void)
+{
+	pci_sc520_init(&enet_hose);
+}
diff --git a/include/configs/eNET.h b/include/configs/eNET.h
index 4356714..243a554 100644
--- a/include/configs/eNET.h
+++ b/include/configs/eNET.h
@@ -86,6 +86,7 @@
 #define CONFIG_CMD_MISC		/* Misc functions like sleep etc*/
 #undef CONFIG_CMD_NET		/* bootp, tftpboot, rarpboot	*/
 #undef CONFIG_CMD_NFS		/* NFS support			*/
+#define CONFIG_CMD_PCI		/* PCI support			*/
 #define CONFIG_CMD_RUN		/* run command in env variable	*/
 #define CONFIG_CMD_SAVEENV	/* saveenv			*/
 #define CONFIG_CMD_SETGETDCR	/* DCR support on 4xx		*/
@@ -200,13 +201,12 @@
  /*-----------------------------------------------------------------------
   * PCI configuration
   */
-#undef CONFIG_PCI                                /* include pci support */
-#undef CONFIG_PCI_PNP                            /* pci plug-and-play */
-#undef CONFIG_PCI_SCAN_SHOW
-#undef CONFIG_SYS_FIRST_PCI_IRQ
-#undef CONFIG_SYS_SECOND_PCI_IRQ
-#undef CONFIG_SYS_THIRD_PCI_IRQ
-#undef CONFIG_SYS_FORTH_PCI_IRQ
+#define CONFIG_PCI                                /* include pci support */
+#define CONFIG_PCI_PNP                            /* pci plug-and-play */
+#define CONFIG_SYS_FIRST_PCI_IRQ   10
+#define CONFIG_SYS_SECOND_PCI_IRQ  9
+#define CONFIG_SYS_THIRD_PCI_IRQ   11
+#define CONFIG_SYS_FORTH_PCI_IRQ   15
 
 /*-----------------------------------------------------------------------
  * Hardware watchdog configuration