[rdc] add a new southbridge driver which registers the gpio and watchdog platform devices

This also fixes the watchdog logic and abstracts the access to the RDC321x
southbridge PCI configuration register space. Based on a patch by Bernhard Loos.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19972 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 110 insertions, 0 deletions

diff --git a/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/pci.c b/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/pci.c
new file mode 100644
index 000000000..0281485c5
--- /dev/null
+++ b/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/pci.c
@@ -0,0 +1,110 @@
+/*
+ * RDC321x southbrige driver
+ *
+ * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/pci.h>
+
+#include <asm/rdc321x_defs.h>
+
+static struct pci_dev *rdc321x_sb_pdev;
+
+/*
+ * Unlocked PCI configuration space accessors
+ */
+int rdc321x_pci_read(int reg, u32 *val)
+{
+	int err;
+
+	err = pci_read_config_dword(rdc321x_sb_pdev, reg, val);
+	if (err)
+		return err;
+
+	return err;
+}
+EXPORT_SYMBOL(rdc321x_pci_read);
+
+int rdc321x_pci_write(int reg, u32 val)
+{
+	int err;
+
+	err = pci_write_config_dword(rdc321x_sb_pdev, reg, val);
+	if (err)
+		return err;
+
+	return err;
+}
+EXPORT_SYMBOL(rdc321x_pci_write);
+
+static struct platform_device rdc321x_wdt_device = {
+	.name	= "rdc321x-wdt"
+};
+
+static struct platform_device rdc321x_gpio_device = {
+	.name	= "rdc321x-gpio"
+};
+
+static int __devinit rdc321x_sb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	int err;
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		printk(KERN_ERR "failed to enable device\n");
+		return err;
+	}
+
+	rdc321x_sb_pdev = pdev;
+
+	err = platform_device_register(&rdc321x_wdt_device);
+	if (err) {
+		dev_err(&pdev->dev, "failed to register watchdog\n");
+		return err;
+	}
+
+	err = platform_device_register(&rdc321x_gpio_device);
+	if (err) {
+		dev_err(&pdev->dev, "failed to register gpiochip\n");
+		return err;
+	}
+	dev_info(&rdc321x_sb_pdev->dev, "RDC321x southhridge registered\n");
+
+	return err;
+}
+
+static struct pci_device_id rdc321x_sb_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
+	{}
+};
+
+static struct pci_driver rdc321x_sb_driver = {
+	.name = "RDC3210 Southbridge",
+	.id_table = rdc321x_sb_table,
+	.probe = rdc321x_sb_probe
+};
+
+static int __init rdc321x_sb_init(void)
+{
+	return pci_register_driver(&rdc321x_sb_driver);
+}
+
+device_initcall(rdc321x_sb_init);