#include <u.h>#include <libc.h>#include <aml.h>#include "acpi.h" #define	THINKPAD_HKEY_VERSION		0x0100 enum {	BrightnessUp = 0x04, 	BrightnessDown}; enum { 	FanLowByte = 0x84,	FanHighByte = 0x85}; #define STATUSLEN 50 /* ACPI thinkpad driver */int acpitp_match(char *id){	return (id && (!strcmp(id, "IBM0068") || !strcmp(id, "LEN0068")));} static voidtp_cmos(struct acpidev *dev, uchar cmd){	void *dot, *m, *p; 	dot = dev->node;	if((m = amlwalk(dot, "\\UCMS")) == 0)		return;	amleval(m, "i", cmd, &p);} static void control(struct acpidev *dev, char *data, u32int len, char *err){	if(!strncmp(data, "brighter", len-1)) {		tp_cmos(dev, BrightnessUp);		goto success;	}	if(!strncmp(data, "dimmer", len-1)) {		tp_cmos(dev, BrightnessDown);		goto success;	}	snprint(err, ERRMAX, "bad value");	return;success:	err[0] = '\0';	return;} static char *status(struct acpidev *, File *){	uvlong hi, lo;	char *buf; 	if((buf = calloc(1, STATUSLEN)) == 0)		sysfatal("%r"); 	amlio(EbctlSpace, 'R', &lo, 1, FanLowByte);	amlio(EbctlSpace, 'R', &hi, 1, FanHighByte);	snprint(buf, STATUSLEN, "Fan RPM: %ulld\n", (hi << 8) | lo);	return buf;} int acpitp_attach(struct acpidev *dev){	void *m, *dot, *p; 	dot = dev->node;	if((m = amlwalk(dot, "MHKV")) == 0)		return 0; 	if(amleval(m, "", &p) < 0)		return 0; 	if(amlint(p) != THINKPAD_HKEY_VERSION)			return 0;	dev->control = control;	dev->status = status;	return 1;}