int
drivers_lenovo_is_wacom_present(void)
{
const char *pn;
int i;
static int result = -1;
struct device *superio;
u8 sioid;
if (result != -1)
return result;
if (CONFIG(DIGITIZER_PRESENT)) {
printk (BIOS_INFO, "Digitizer state forced as present\n");
return (result = 1);
}
if (CONFIG(DIGITIZER_ABSENT)) {
printk (BIOS_INFO, "Digitizer state forced as absent\n");
return (result = 0);
}
superio = dev_find_slot_pnp (0x164e, 3);
if (!superio) {
printk (BIOS_INFO, "No Super I/O, skipping wacom\n");
return (result = 0);
}
/* Probe ID. */
sioid = pnp_read_config(superio, 0x20);
if (sioid == 0xff) {
printk (BIOS_INFO, "Super I/O probe failed, skipping wacom\n");
return (result = 0);
}
pn = lenovo_mainboard_partnumber();
if (!pn)
return (result = 0);
printk (BIOS_DEBUG, "Lenovo P/N is %s\n", pn);
for (i = 0; i < ARRAY_SIZE (tablet_numbers); i++)
if (memcmp (tablet_numbers[i], pn, 4) == 0) {
printk (BIOS_DEBUG, "Lenovo P/N %s is a tablet\n", pn);
return (result = 1);
}
printk (BIOS_DEBUG, "Lenovo P/N %s is not a tablet\n", pn);
return (result = 0);
}
const char *smbios_mainboard_product_name(void)
{
return lenovo_mainboard_partnumber();
}