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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_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,
};
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