static int __init samsung_init(void)
{
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
if (!dmi_check_system(samsung_dmi_table))
return -ENODEV;
/*
* The Samsung N120, N130, and NC10 use pci device id 0x27ae, while the
* NP-Q45 uses 0x2a02
* R468/R418, R518, R510/P510, X320/X420/X520 and X360 uses 0x2a42
* N220 uses 0xa011
* Odds are we might need to add more to the
* list over time...
*/
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x27ae, NULL);
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x2a02, NULL);
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x2a42, NULL);
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0xa011, NULL);
if (!pci_device)
return -ENODEV;
/* create a backlight device to talk to this one */
backlight_device = backlight_device_register("samsung",
&pci_device->dev,
NULL, &backlight_ops, &props);
if (IS_ERR(backlight_device)) {
pci_dev_put(pci_device);
return PTR_ERR(backlight_device);
}
backlight_device->props.max_brightness = MAX_BRIGHT;
backlight_device->props.brightness = read_brightness();
backlight_device->props.power = FB_BLANK_UNBLANK;
backlight_update_status(backlight_device);
return 0;
}
static int __init samsung_init(void)
{
struct device *parent=NULL;
if (use_sabi && !dmi_check_system(samsung_sabi_dmi_table) && !force){
printk(KERN_ERR "Samsung-backlight is intended to work only with Samsung laptops.\n");
return -ENODEV;
}
if (!use_sabi && !dmi_check_system(samsung_dmi_table) && !force){
printk(KERN_ERR "Sorry, your laptop is not supported. Try use_sabi=1\n");
return -ENODEV;
}
if(use_sabi){
const char *test_str = "SwSmi@";
int pos;
int index = 0;
void __iomem *base;
unsigned int ifaceP;
mutex_init(&sabi_mutex);
f0000_segment = ioremap(0xf0000, 0xffff);
if (!f0000_segment) {
printk(KERN_ERR "Samsung-backlight: Can't map the segment at 0xf0000\n");
return -EINVAL;
}
printk(KERN_INFO "Samsung-backlight: checking for SABI support.\n");
/* Try to find the signature "SwSmi@" in memory to find the header */
base = f0000_segment;
for (pos = 0; pos < 0xffff; ++pos) {
char temp = readb(base + pos);
if (temp == test_str[index]) {
if (5 == index++)
break;
}
else {
index = 0;
}
}
if (pos == 0xffff) {
printk(KERN_INFO "Samsung-backlight: SABI is not supported\n");
iounmap(f0000_segment);
return -EINVAL;
}
sabi = (struct sabi_header __iomem *)(base + pos + 1);
printk(KERN_INFO "Samsung-backlight: SABI is supported (%x)\n", pos + 0xf0000 - 6);
if (debug) {
printk(KERN_DEBUG "SABI header:\n");
printk(KERN_DEBUG " SMI Port Number = 0x%04x\n", readw(&sabi->port));
printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n", readb(&sabi->iface_func));
printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n", readb(&sabi->en_mem));
printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n", readb(&sabi->re_mem));
printk(KERN_DEBUG " SABI data offset = 0x%04x\n", readw(&sabi->data_offset));
printk(KERN_DEBUG " SABI data segment = 0x%04x\n", readw(&sabi->data_segment));
printk(KERN_DEBUG " BIOS interface version = 0x%02x\n", readb(&sabi->bios_ifver));
printk(KERN_DEBUG " KBD Launcher string = 0x%02x\n", readb(&sabi->launcher_string));
}
/* Get a pointer to the SABI Interface */
ifaceP = (readw(&sabi->data_segment) & 0x0ffff) << 4;
ifaceP += readw(&sabi->data_offset) & 0x0ffff;
sabi_iface = (struct sabi_interface __iomem *)ioremap(ifaceP, 16);
if (!sabi_iface) {
printk(KERN_ERR "Samsung-backlight: Can't remap %x\n", ifaceP);
iounmap(f0000_segment);
return -EINVAL;
}
if (debug) {
printk(KERN_DEBUG "Samsung-backlight: SABI Interface = %p\n", sabi_iface);
}
}else{
/*
* The Samsung N120, N130, and NC10 use pci device id 0x27ae, while the
* NP-Q45 uses 0x2a02. Odds are we might need to add more to the
* list over time...
*/
int pcidevids[]={0x27ae,0x2a02,0x2a42,0xa011,0};
int i;
for(i=0, pci_device=NULL;pcidevids[i]>0 && pci_device==NULL;++i)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, pcidevids[i], NULL);
if (!pci_device)
return -ENODEV;
parent=&pci_device->dev;
}
/* create a backlight device to talk to this one */
#if LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,34)
backlight_device = backlight_device_register("samsung",
parent,
NULL, &backlight_ops,NULL);
#else
backlight_device = backlight_device_register("samsung",
parent,
NULL, &backlight_ops);
#endif
if (IS_ERR(backlight_device)) {
if(pci_device)
pci_dev_put(pci_device);
return PTR_ERR(backlight_device);
}
backlight_device->props.max_brightness = use_sabi ? SABI_MAX_BRIGHT : MAX_BRIGHT;
backlight_device->props.brightness = read_brightness();
backlight_device->props.power = FB_BLANK_UNBLANK;
backlight_update_status(backlight_device);
return 0;
}
static int get_brightness(struct backlight_device *bd)
{
return read_brightness();
//return bd->props.brightness;
}
