/* pmc - Driver implementation for power management functions * of Power Management Controller (PMC) on SPARCstation-Voyager. * * Copyright (c) 2002 Eric Brower (ebrower@usa.net) */#include <linux/kernel.h>#include <linux/fs.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/miscdevice.h>#include <linux/pm.h>#include <asm/io.h>#include <asm/sbus.h>#include <asm/oplib.h>#include <asm/uaccess.h>#include <asm/auxio.h>/* Debug * * #define PMC_DEBUG_LED * #define PMC_NO_IDLE */#define PMC_MINOR	MISC_DYNAMIC_MINOR#define PMC_OBPNAME	"SUNW,pmc"#define PMC_DEVNAME "pmc"#define PMC_IDLE_REG	0x00#define PMC_IDLE_ON		0x01volatile static u8 *regs; static int pmc_regsize;#define pmc_readb(offs)			(sbus_readb(regs+offs))#define pmc_writeb(val, offs) 	(sbus_writeb(val, regs+offs))/*  * CPU idle callback function * See .../arch/sparc/kernel/process.c */void pmc_swift_idle(void){#ifdef PMC_DEBUG_LED	set_auxio(0x00, AUXIO_LED); #endif	pmc_writeb(pmc_readb(PMC_IDLE_REG) | PMC_IDLE_ON, PMC_IDLE_REG);#ifdef PMC_DEBUG_LED	set_auxio(AUXIO_LED, 0x00); #endif} static inline void pmc_free(void){	sbus_iounmap((unsigned long)regs, pmc_regsize);}static int __init pmc_probe(void){	struct sbus_bus *sbus = NULL;	struct sbus_dev *sdev = NULL;	for_each_sbus(sbus) {		for_each_sbusdev(sdev, sbus) {			if (!strcmp(sdev->prom_name, PMC_OBPNAME)) {				goto sbus_done;			}		}	}sbus_done:	if (!sdev) {		return -ENODEV;	}	pmc_regsize = sdev->reg_addrs[0].reg_size;	regs = (u8*) sbus_ioremap(&sdev->resource[0], 0, 				   pmc_regsize, PMC_OBPNAME);	if(NULL == regs) {		printk(KERN_ERR "%s: unable to map registers\n", PMC_DEVNAME);		return -ENODEV;	}#ifndef PMC_NO_IDLE	/* Assign power management IDLE handler */	pm_idle = pmc_swift_idle;	#endif	printk(KERN_INFO "%s: power management initialized\n", PMC_DEVNAME);	return 0;}/* This driver is not critical to the boot process * and is easiest to ioremap when SBus is already * initialized, so we install ourselves thusly: */__initcall(pmc_probe);