From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/arm/common/via82c505.c | 92 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 arch/arm/common/via82c505.c

(limited to 'arch/arm/common/via82c505.c')

diff --git a/arch/arm/common/via82c505.c b/arch/arm/common/via82c505.c
new file mode 100644
index 00000000..8421d391
--- /dev/null
+++ b/arch/arm/common/via82c505.c
@@ -0,0 +1,92 @@
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+
+#include <asm/system.h>
+
+#include <asm/mach/pci.h>
+
+#define MAX_SLOTS		7
+
+#define CONFIG_CMD(bus, devfn, where)   (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
+
+static int
+via82c505_read_config(struct pci_bus *bus, unsigned int devfn, int where,
+		      int size, u32 *value)
+{
+	outl(CONFIG_CMD(bus,devfn,where),0xCF8);
+	switch (size) {
+	case 1:
+		*value=inb(0xCFC + (where&3));
+		break;
+	case 2:
+		*value=inw(0xCFC + (where&2));
+		break;
+	case 4:
+		*value=inl(0xCFC);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+via82c505_write_config(struct pci_bus *bus, unsigned int devfn, int where,
+		       int size, u32 value)
+{
+	outl(CONFIG_CMD(bus,devfn,where),0xCF8);
+	switch (size) {
+	case 1:
+		outb(value, 0xCFC + (where&3));
+		break;
+	case 2:
+		outw(value, 0xCFC + (where&2));
+		break;
+	case 4:
+		outl(value, 0xCFC);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops via82c505_ops = {
+	.read	= via82c505_read_config,
+	.write	= via82c505_write_config,
+};
+
+void __init via82c505_preinit(void)
+{
+	printk(KERN_DEBUG "PCI: VIA 82c505\n");
+	if (!request_region(0xA8,2,"via config")) {
+		printk(KERN_WARNING"VIA 82c505: Unable to request region 0xA8\n");
+		return;
+	}
+	if (!request_region(0xCF8,8,"pci config")) {
+		printk(KERN_WARNING"VIA 82c505: Unable to request region 0xCF8\n");
+		release_region(0xA8, 2);
+		return;
+	}
+
+	/* Enable compatible Mode */
+	outb(0x96,0xA8);
+	outb(0x18,0xA9);
+	outb(0x93,0xA8);
+	outb(0xd0,0xA9);
+
+}
+
+int __init via82c505_setup(int nr, struct pci_sys_data *sys)
+{
+	return (nr == 0);
+}
+
+struct pci_bus * __init via82c505_scan_bus(int nr, struct pci_sys_data *sysdata)
+{
+	if (nr == 0)
+		return pci_scan_bus(0, &via82c505_ops, sysdata);
+
+	return NULL;
+}
-- 
cgit v1.2.3