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#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(BIOS_DEBUG, "Flash device: MFGID %02x, DEVID %02x\n", id1, id2);
#endif
}
static void southbridge_init(struct device *dev)
{
printk(BIOS_SPEW, "cs5535: %s\n", __func__);
nvram_on(dev);
}
/*
static void dump_south(struct device *dev)
{
int i, j;
for(i=0; i<256; i+=16) {
printk(BIOS_DEBUG, "0x%02x: ", i);
for(j=0; j<16; j++)
printk(BIOS_DEBUG, "%02x ", pci_read_config8(dev, i+j));
printk(BIOS_DEBUG, "\n");
}
}
*/
static void southbridge_enable(struct device *dev)
{
printk(BIOS_SPEW, "%s: dev is %p\n", __func__, dev);
}
static void cs5535_read_resources(device_t dev)
{
struct resource *res;
pci_dev_read_resources(dev);
res = new_resource(dev, 1);
res->base = 0x0UL;
res->size = 0x1000UL;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
res = new_resource(dev, 3); /* IOAPIC */
res->base = 0xfec00000;
res->size = 0x00001000;
res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}
static struct device_operations southbridge_ops = {
.read_resources = cs5535_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = southbridge_init,
.enable = southbridge_enable,
.scan_bus = scan_static_bus,
};
static const struct pci_driver cs5535_pci_driver __pci_driver = {
.ops = &southbridge_ops,
.vendor = PCI_VENDOR_ID_NS,
.device = PCI_DEVICE_ID_NS_CS5535
};
struct chip_operations southbridge_amd_cs5535_ops = {
CHIP_NAME("AMD Geode CS5535 Southbridge")
/* This is only called when this device is listed in the
* static device tree.
*/
.enable_dev = southbridge_enable,
};
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