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#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <arch/io.h>
#include <pc80/mc146818rtc.h>
#include "chip.h"
#include "southbridge/amd/cs5536/cs5536_smbus2.h"
/* Borrowed from mc146818rtc.c */
#define CMOS_READ(addr) ({ \
outb((addr),RTC_PORT(0)); \
inb(RTC_PORT(1)); \
})
#define CMOS_WRITE(val, addr) ({ \
outb((addr),RTC_PORT(0)); \
outb((val),RTC_PORT(1)); \
})
static void write_bit(unsigned char val) {
unsigned char byte = CMOS_READ(440 / 8);
/* Don't change it if its already set */
if ((byte & 1) == (val & 1))
return;
byte &= ~1;
byte |= val & 1;
CMOS_WRITE(val, 440/8);
}
static unsigned short _getsmbusbase(void) {
unsigned devfn = PCI_DEVFN(0xf, 0);
device_t dev = dev_find_slot(0x0, devfn);
unsigned long addr = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
return (unsigned short) (addr & ~1);
}
static void init_dcon(void) {
int ret = 1;
unsigned short rev = 0;
unsigned short iobase = _getsmbusbase();
printk(BIOS_DEBUG, "CHECKING FOR DCON (%x)\n", iobase);
/* Get the IO base for the SMBUS */
rev = do_smbus_read_word(iobase, 0x0D << 1, 0x00);
if (rev & 0xDC00) {
printk(BIOS_DEBUG, "DCON FOUND - REV %x\n", rev);
/* Enable the DCON */
ret = do_smbus_write_word(iobase, 0x0D << 1, 0x01, 0x0069);
if (ret != 0)
printk(BIOS_DEBUG, "DCON ENABLE FAILED %d\n", ret);
}
else
printk(BIOS_DEBUG, "DCON NOT FOUND (%x)\n", rev);
write_bit(rev > 0 ? 1 : 0);
}
static void init(struct device *dev) {
/*
unsigned bus = 0;
unsigned devfn = PCI_DEVFN(0xf, 4);
device_t usb = NULL;
unsigned char usbirq = 0xa;
*/
printk(BIOS_DEBUG, "OLPC REVA ENTER %s\n", __func__);
#if 0
/* I can't think of any reason NOT to just set this. If it turns out we want this to be
* conditional we can make it a config variable later.
*/
printk(BIOS_DEBUG, "%s (%x,%x)SET USB PCI interrupt line to %d\n",
__func__, bus, devfn, usbirq);
usb = dev_find_slot(bus, devfn);
if (! usb){
printk(BIOS_ERR, "Could not find USB\n");
} else {
pci_write_config8(usb, PCI_INTERRUPT_LINE, usbirq);
}
#endif
init_dcon();
printk(BIOS_DEBUG, "OLPC REVA EXIT %s\n", __func__);
}
static void enable_dev(struct device *dev)
{
dev->ops->init = init;
}
struct chip_operations mainboard_ops = {
CHIP_NAME("OLPC rev_a Mainboard")
.enable_dev = enable_dev,
};
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