i386: move kernel/cpu/cpufreq

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 440 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
deleted file mode 100644
index a5b2346faf1f..000000000000
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
+++ /dev/null
@@ -1,440 +0,0 @@
-/*
- * (C) 2001  Dave Jones, Arjan van de ven.
- * (C) 2002 - 2003  Dominik Brodowski <linux@brodo.de>
- *
- *  Licensed under the terms of the GNU GPL License version 2.
- *  Based upon reverse engineered information, and on Intel documentation
- *  for chipsets ICH2-M and ICH3-M.
- *
- *  Many thanks to Ducrot Bruno for finding and fixing the last
- *  "missing link" for ICH2-M/ICH3-M support, and to Thomas Winkler
- *  for extensive testing.
- *
- *  BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous*
- */
-
-
-/*********************************************************************
- *                        SPEEDSTEP - DEFINITIONS                    *
- *********************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-
-#include "speedstep-lib.h"
-
-
-/* speedstep_chipset:
- *   It is necessary to know which chipset is used. As accesses to
- * this device occur at various places in this module, we need a
- * static struct pci_dev * pointing to that device.
- */
-static struct pci_dev *speedstep_chipset_dev;
-
-
-/* speedstep_processor
- */
-static unsigned int speedstep_processor = 0;
-
-static u32 pmbase;
-
-/*
- *   There are only two frequency states for each processor. Values
- * are in kHz for the time being.
- */
-static struct cpufreq_frequency_table speedstep_freqs[] = {
-	{SPEEDSTEP_HIGH,	0},
-	{SPEEDSTEP_LOW,		0},
-	{0,			CPUFREQ_TABLE_END},
-};
-
-
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-ich", msg)
-
-
-/**
- * speedstep_find_register - read the PMBASE address
- *
- * Returns: -ENODEV if no register could be found
- */
-static int speedstep_find_register (void)
-{
-	if (!speedstep_chipset_dev)
-		return -ENODEV;
-
-	/* get PMBASE */
-	pci_read_config_dword(speedstep_chipset_dev, 0x40, &pmbase);
-	if (!(pmbase & 0x01)) {
-		printk(KERN_ERR "speedstep-ich: could not find speedstep register\n");
-		return -ENODEV;
-	}
-
-	pmbase &= 0xFFFFFFFE;
-	if (!pmbase) {
-		printk(KERN_ERR "speedstep-ich: could not find speedstep register\n");
-		return -ENODEV;
-	}
-
-	dprintk("pmbase is 0x%x\n", pmbase);
-	return 0;
-}
-
-/**
- * speedstep_set_state - set the SpeedStep state
- * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
- *
- *   Tries to change the SpeedStep state.
- */
-static void speedstep_set_state (unsigned int state)
-{
-	u8 pm2_blk;
-	u8 value;
-	unsigned long flags;
-
-	if (state > 0x1)
-		return;
-
-	/* Disable IRQs */
-	local_irq_save(flags);
-
-	/* read state */
-	value = inb(pmbase + 0x50);
-
-	dprintk("read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value);
-
-	/* write new state */
-	value &= 0xFE;
-	value |= state;
-
-	dprintk("writing 0x%x to pmbase 0x%x + 0x50\n", value, pmbase);
-
-	/* Disable bus master arbitration */
-	pm2_blk = inb(pmbase + 0x20);
-	pm2_blk |= 0x01;
-	outb(pm2_blk, (pmbase + 0x20));
-
-	/* Actual transition */
-	outb(value, (pmbase + 0x50));
-
-	/* Restore bus master arbitration */
-	pm2_blk &= 0xfe;
-	outb(pm2_blk, (pmbase + 0x20));
-
-	/* check if transition was successful */
-	value = inb(pmbase + 0x50);
-
-	/* Enable IRQs */
-	local_irq_restore(flags);
-
-	dprintk("read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value);
-
-	if (state == (value & 0x1)) {
-		dprintk("change to %u MHz succeeded\n", (speedstep_get_processor_frequency(speedstep_processor) / 1000));
-	} else {
-		printk (KERN_ERR "cpufreq: change failed - I/O error\n");
-	}
-
-	return;
-}
-
-
-/**
- * speedstep_activate - activate SpeedStep control in the chipset
- *
- *   Tries to activate the SpeedStep status and control registers.
- * Returns -EINVAL on an unsupported chipset, and zero on success.
- */
-static int speedstep_activate (void)
-{
-	u16 value = 0;
-
-	if (!speedstep_chipset_dev)
-		return -EINVAL;
-
-	pci_read_config_word(speedstep_chipset_dev, 0x00A0, &value);
-	if (!(value & 0x08)) {
-		value |= 0x08;
-		dprintk("activating SpeedStep (TM) registers\n");
-		pci_write_config_word(speedstep_chipset_dev, 0x00A0, value);
-	}
-
-	return 0;
-}
-
-
-/**
- * speedstep_detect_chipset - detect the Southbridge which contains SpeedStep logic
- *
- *   Detects ICH2-M, ICH3-M and ICH4-M so far. The pci_dev points to
- * the LPC bridge / PM module which contains all power-management
- * functions. Returns the SPEEDSTEP_CHIPSET_-number for the detected
- * chipset, or zero on failure.
- */
-static unsigned int speedstep_detect_chipset (void)
-{
-	speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-			      PCI_DEVICE_ID_INTEL_82801DB_12,
-			      PCI_ANY_ID,
-			      PCI_ANY_ID,
-			      NULL);
-	if (speedstep_chipset_dev)
-		return 4; /* 4-M */
-
-	speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-			      PCI_DEVICE_ID_INTEL_82801CA_12,
-			      PCI_ANY_ID,
-			      PCI_ANY_ID,
-			      NULL);
-	if (speedstep_chipset_dev)
-		return 3; /* 3-M */
-
-
-	speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-			      PCI_DEVICE_ID_INTEL_82801BA_10,
-			      PCI_ANY_ID,
-			      PCI_ANY_ID,
-			      NULL);
-	if (speedstep_chipset_dev) {
-		/* speedstep.c causes lockups on Dell Inspirons 8000 and
-		 * 8100 which use a pretty old revision of the 82815
-		 * host brige. Abort on these systems.
-		 */
-		static struct pci_dev *hostbridge;
-
-		hostbridge  = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-			      PCI_DEVICE_ID_INTEL_82815_MC,
-			      PCI_ANY_ID,
-			      PCI_ANY_ID,
-			      NULL);
-
-		if (!hostbridge)
-			return 2; /* 2-M */
-
-		if (hostbridge->revision < 5) {
-			dprintk("hostbridge does not support speedstep\n");
-			speedstep_chipset_dev = NULL;
-			pci_dev_put(hostbridge);
-			return 0;
-		}
-
-		pci_dev_put(hostbridge);
-		return 2; /* 2-M */
-	}
-
-	return 0;
-}
-
-static unsigned int _speedstep_get(cpumask_t cpus)
-{
-	unsigned int speed;
-	cpumask_t cpus_allowed;
-
-	cpus_allowed = current->cpus_allowed;
-	set_cpus_allowed(current, cpus);
-	speed = speedstep_get_processor_frequency(speedstep_processor);
-	set_cpus_allowed(current, cpus_allowed);
-	dprintk("detected %u kHz as current frequency\n", speed);
-	return speed;
-}
-
-static unsigned int speedstep_get(unsigned int cpu)
-{
-	return _speedstep_get(cpumask_of_cpu(cpu));
-}
-
-/**
- * speedstep_target - set a new CPUFreq policy
- * @policy: new policy
- * @target_freq: the target frequency
- * @relation: how that frequency relates to achieved frequency (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
- *
- * Sets a new CPUFreq policy.
- */
-static int speedstep_target (struct cpufreq_policy *policy,
-			     unsigned int target_freq,
-			     unsigned int relation)
-{
-	unsigned int newstate = 0;
-	struct cpufreq_freqs freqs;
-	cpumask_t cpus_allowed;
-	int i;
-
-	if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
-		return -EINVAL;
-
-	freqs.old = _speedstep_get(policy->cpus);
-	freqs.new = speedstep_freqs[newstate].frequency;
-	freqs.cpu = policy->cpu;
-
-	dprintk("transiting from %u to %u kHz\n", freqs.old, freqs.new);
-
-	/* no transition necessary */
-	if (freqs.old == freqs.new)
-		return 0;
-
-	cpus_allowed = current->cpus_allowed;
-
-	for_each_cpu_mask(i, policy->cpus) {
-		freqs.cpu = i;
-		cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-	}
-
-	/* switch to physical CPU where state is to be changed */
-	set_cpus_allowed(current, policy->cpus);
-
-	speedstep_set_state(newstate);
-
-	/* allow to be run on all CPUs */
-	set_cpus_allowed(current, cpus_allowed);
-
-	for_each_cpu_mask(i, policy->cpus) {
-		freqs.cpu = i;
-		cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-	}
-
-	return 0;
-}
-
-
-/**
- * speedstep_verify - verifies a new CPUFreq policy
- * @policy: new policy
- *
- * Limit must be within speedstep_low_freq and speedstep_high_freq, with
- * at least one border included.
- */
-static int speedstep_verify (struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]);
-}
-
-
-static int speedstep_cpu_init(struct cpufreq_policy *policy)
-{
-	int result = 0;
-	unsigned int speed;
-	cpumask_t cpus_allowed;
-
-	/* only run on CPU to be set, or on its sibling */
-#ifdef CONFIG_SMP
-	policy->cpus = cpu_sibling_map[policy->cpu];
-#endif
-
-	cpus_allowed = current->cpus_allowed;
-	set_cpus_allowed(current, policy->cpus);
-
-	/* detect low and high frequency and transition latency */
-	result = speedstep_get_freqs(speedstep_processor,
-				     &speedstep_freqs[SPEEDSTEP_LOW].frequency,
-				     &speedstep_freqs[SPEEDSTEP_HIGH].frequency,
-				     &policy->cpuinfo.transition_latency,
-				     &speedstep_set_state);
-	set_cpus_allowed(current, cpus_allowed);
-	if (result)
-		return result;
-
-	/* get current speed setting */
-	speed = _speedstep_get(policy->cpus);
-	if (!speed)
-		return -EIO;
-
-	dprintk("currently at %s speed setting - %i MHz\n",
-		(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
-		(speed / 1000));
-
-	/* cpuinfo and default policy values */
-	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-	policy->cur = speed;
-
-	result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
-	if (result)
-		return (result);
-
-        cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
-
-	return 0;
-}
-
-
-static int speedstep_cpu_exit(struct cpufreq_policy *policy)
-{
-	cpufreq_frequency_table_put_attr(policy->cpu);
-	return 0;
-}
-
-static struct freq_attr* speedstep_attr[] = {
-	&cpufreq_freq_attr_scaling_available_freqs,
-	NULL,
-};
-
-
-static struct cpufreq_driver speedstep_driver = {
-	.name	= "speedstep-ich",
-	.verify	= speedstep_verify,
-	.target	= speedstep_target,
-	.init	= speedstep_cpu_init,
-	.exit	= speedstep_cpu_exit,
-	.get	= speedstep_get,
-	.owner	= THIS_MODULE,
-	.attr	= speedstep_attr,
-};
-
-
-/**
- * speedstep_init - initializes the SpeedStep CPUFreq driver
- *
- *   Initializes the SpeedStep support. Returns -ENODEV on unsupported
- * devices, -EINVAL on problems during initiatization, and zero on
- * success.
- */
-static int __init speedstep_init(void)
-{
-	/* detect processor */
-	speedstep_processor = speedstep_detect_processor();
-	if (!speedstep_processor) {
-		dprintk("Intel(R) SpeedStep(TM) capable processor not found\n");
-		return -ENODEV;
-	}
-
-	/* detect chipset */
-	if (!speedstep_detect_chipset()) {
-		dprintk("Intel(R) SpeedStep(TM) for this chipset not (yet) available.\n");
-		return -ENODEV;
-	}
-
-	/* activate speedstep support */
-	if (speedstep_activate()) {
-		pci_dev_put(speedstep_chipset_dev);
-		return -EINVAL;
-	}
-
-	if (speedstep_find_register())
-		return -ENODEV;
-
-	return cpufreq_register_driver(&speedstep_driver);
-}
-
-
-/**
- * speedstep_exit - unregisters SpeedStep support
- *
- *   Unregisters SpeedStep support.
- */
-static void __exit speedstep_exit(void)
-{
-	pci_dev_put(speedstep_chipset_dev);
-	cpufreq_unregister_driver(&speedstep_driver);
-}
-
-
-MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>, Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION ("Speedstep driver for Intel mobile processors on chipsets with ICH-M southbridges.");
-MODULE_LICENSE ("GPL");
-
-module_init(speedstep_init);
-module_exit(speedstep_exit);