commands: add 'lspci' command

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/Kconfig

@@ -207,6 +207,14 @@ config CMD_REGULATOR
 	  the regulator command lists the currently registered regulators and
 	  their current state.
 
+config CMD_LSPCI
+	bool
+	depends on PCI
+	prompt "lspci command"
+	default y
+	help
+	  The lspci command allows to list all PCI devices.
+
 config CMD_VERSION
 	tristate
 	default y

commands/Makefile

@@ -99,3 +99,4 @@ obj-$(CONFIG_CMD_READF)		+= readf.o
 obj-$(CONFIG_CMD_MENUTREE)	+= menutree.o
 obj-$(CONFIG_CMD_2048)		+= 2048.o
 obj-$(CONFIG_CMD_REGULATOR)	+= regulator.o
+obj-$(CONFIG_CMD_LSPCI)		+= lspci.o

commands/lspci.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2011-2014 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This file is part of barebox.
+ * 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 version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <complete.h>
+#include <linux/pci.h>
+
+static int do_lspci(int argc, char *argv[])
+{
+	struct pci_bus *root_bus;
+	struct pci_dev *dev;
+
+	if (list_empty(&pci_root_buses)) {
+		printf("No PCI bus detected\n");
+		return 1;
+	}
+
+	list_for_each_entry(root_bus, &pci_root_buses, node) {
+		list_for_each_entry(dev, &root_bus->devices, bus_list) {
+			printf("%02x: %04x: %04x:%04x (rev %02x)\n",
+				      dev->devfn,
+				      (dev->class >> 8) & 0xffff,
+				      dev->vendor,
+				      dev->device,
+				      dev->revision);
+		}
+	}
+
+	return 0;
+}
+
+BAREBOX_CMD_START(lspci)
+	.cmd            = do_lspci,
+	BAREBOX_CMD_DESC("Show PCI info")
+	BAREBOX_CMD_GROUP(CMD_GRP_INFO)
+	BAREBOX_CMD_COMPLETE(empty_complete)
+BAREBOX_CMD_END