1 files changed, 92 insertions, 0 deletions
diff --git a/src/southbridge/amd/cs5535/cs5535.c b/src/southbridge/amd/cs5535/cs5535.c
new file mode 100644
index 0000000000..85028c2a09
--- /dev/null
+++ b/src/southbridge/amd/cs5535/cs5535.c
@@ -0,0 +1,92 @@
+
+#include <arch/io.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ops.h>
+#include <device/pci_ids.h>
+#include <console/console.h>
+#include "cs5535.h"
+
+static void nvram_on(struct device *dev)
+{
+#if 0
+	volatile char *flash = (volatile unsigned char *)0xFFFc0000;
+	unsigned char id1, id2;
+#endif
+	unsigned char reg;
+
+	/* Enable writes to flash at top of memory */
+	pci_write_config8(dev, 0x52, 0xee);
+
+	/* Set positive decode on ROM */
+	/* Also, there is no apparent reason to turn off the devoce on the */
+	/* IDE devices */
+	
+	reg = pci_read_config8(dev, 0x5b);
+	reg |= 1 << 5;	/* ROM Decode */
+	reg |= 1 << 3;	/* Primary IDE decode */
+	reg |= 1 << 4;	/* Secondary IDE decode */
+
+	pci_write_config8(dev, 0x5b, reg);
+
+#if 0		// just to test if the flash is accessible!
+	*(flash + 0x555) = 0xaa;
+	*(flash + 0x2aa) = 0x55;
+	*(flash + 0x555) = 0x90;
+
+	id1 = *(volatile unsigned char *) flash;
+	id2 = *(volatile unsigned char *) (flash + 1);
+
+	*flash = 0xf0;
+
+	printk_debug("Flash device: MFGID %02x, DEVID %02x\n", id1, id2);
+#endif
+}
+
+	
+static void southbridge_init(struct device *dev)
+{
+	printk_spew("cs5535: %s\n", __FUNCTION__);
+	nvram_on(dev);
+}
+
+/*
+static void dump_south(struct device *dev)
+{
+	int i, j;
+
+	for(i=0; i<256; i+=16) {
+		printk_debug("0x%02x: ", i);
+		for(j=0; j<16; j++)
+			printk_debug("%02x ", pci_read_config8(dev, i+j));
+		printk_debug("\n");
+	}
+}
+*/
+
+static void southbridge_enable(struct device *dev)
+{
+	printk_spew("%s: dev is %p\n", __FUNCTION__, dev);
+}
+
+static void cs5535_pci_dev_enable_resources(device_t dev)
+{
+	printk_spew("cs5535.c: %s()\n", __FUNCTION__);
+	pci_dev_enable_resources(dev);
+	enable_childrens_resources(dev);
+}
+
+static struct device_operations southbridge_ops = {
+	.read_resources   = pci_dev_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = cs5535_pci_dev_enable_resources,
+	.init             = southbridge_init,
+	.enable           = southbridge_enable,
+	.scan_bus         = scan_static_bus,
+};
+
+static struct pci_driver cs5535_pci_driver __pci_driver = {
+	.ops 	= &southbridge_ops,
+	.vendor = PCI_VENDOR_ID_CYRIX,
+	.device = PCI_DEVICE_ID_CYRIX_5535_LEGACY,
+};