cpufreq: sparc: move cpufreq driver to drivers/cpufreq

This patch moves cpufreq driver of SPARC architecture to drivers/cpufreq.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 0 insertions, 408 deletions

diff --git a/arch/sparc/kernel/us2e_cpufreq.c b/arch/sparc/kernel/us2e_cpufreq.c
deleted file mode 100644
index 306ae462bba6..000000000000
--- a/arch/sparc/kernel/us2e_cpufreq.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/* us2e_cpufreq.c: UltraSPARC-IIe cpu frequency support
- *
- * Copyright (C) 2003 David S. Miller (davem@redhat.com)
- *
- * Many thanks to Dominik Brodowski for fixing up the cpufreq
- * infrastructure in order to make this driver easier to implement.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/cpufreq.h>
-#include <linux/threads.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-
-#include <asm/asi.h>
-#include <asm/timer.h>
-
-static struct cpufreq_driver *cpufreq_us2e_driver;
-
-struct us2e_freq_percpu_info {
-	struct cpufreq_frequency_table table[6];
-};
-
-/* Indexed by cpu number. */
-static struct us2e_freq_percpu_info *us2e_freq_table;
-
-#define HBIRD_MEM_CNTL0_ADDR	0x1fe0000f010UL
-#define HBIRD_ESTAR_MODE_ADDR	0x1fe0000f080UL
-
-/* UltraSPARC-IIe has five dividers: 1, 2, 4, 6, and 8.  These are controlled
- * in the ESTAR mode control register.
- */
-#define ESTAR_MODE_DIV_1	0x0000000000000000UL
-#define ESTAR_MODE_DIV_2	0x0000000000000001UL
-#define ESTAR_MODE_DIV_4	0x0000000000000003UL
-#define ESTAR_MODE_DIV_6	0x0000000000000002UL
-#define ESTAR_MODE_DIV_8	0x0000000000000004UL
-#define ESTAR_MODE_DIV_MASK	0x0000000000000007UL
-
-#define MCTRL0_SREFRESH_ENAB	0x0000000000010000UL
-#define MCTRL0_REFR_COUNT_MASK	0x0000000000007f00UL
-#define MCTRL0_REFR_COUNT_SHIFT	8
-#define MCTRL0_REFR_INTERVAL	7800
-#define MCTRL0_REFR_CLKS_P_CNT	64
-
-static unsigned long read_hbreg(unsigned long addr)
-{
-	unsigned long ret;
-
-	__asm__ __volatile__("ldxa	[%1] %2, %0"
-			     : "=&r" (ret)
-			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
-	return ret;
-}
-
-static void write_hbreg(unsigned long addr, unsigned long val)
-{
-	__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
-			     "membar	#Sync"
-			     : /* no outputs */
-			     : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
-			     : "memory");
-	if (addr == HBIRD_ESTAR_MODE_ADDR) {
-		/* Need to wait 16 clock cycles for the PLL to lock.  */
-		udelay(1);
-	}
-}
-
-static void self_refresh_ctl(int enable)
-{
-	unsigned long mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-
-	if (enable)
-		mctrl |= MCTRL0_SREFRESH_ENAB;
-	else
-		mctrl &= ~MCTRL0_SREFRESH_ENAB;
-	write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
-	(void) read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-}
-
-static void frob_mem_refresh(int cpu_slowing_down,
-			     unsigned long clock_tick,
-			     unsigned long old_divisor, unsigned long divisor)
-{
-	unsigned long old_refr_count, refr_count, mctrl;
-
-	refr_count  = (clock_tick * MCTRL0_REFR_INTERVAL);
-	refr_count /= (MCTRL0_REFR_CLKS_P_CNT * divisor * 1000000000UL);
-
-	mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-	old_refr_count = (mctrl & MCTRL0_REFR_COUNT_MASK)
-		>> MCTRL0_REFR_COUNT_SHIFT;
-
-	mctrl &= ~MCTRL0_REFR_COUNT_MASK;
-	mctrl |= refr_count << MCTRL0_REFR_COUNT_SHIFT;
-	write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
-	mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-
-	if (cpu_slowing_down && !(mctrl & MCTRL0_SREFRESH_ENAB)) {
-		unsigned long usecs;
-
-		/* We have to wait for both refresh counts (old
-		 * and new) to go to zero.
-		 */
-		usecs = (MCTRL0_REFR_CLKS_P_CNT *
-			 (refr_count + old_refr_count) *
-			 1000000UL *
-			 old_divisor) / clock_tick;
-		udelay(usecs + 1UL);
-	}
-}
-
-static void us2e_transition(unsigned long estar, unsigned long new_bits,
-			    unsigned long clock_tick,
-			    unsigned long old_divisor, unsigned long divisor)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-
-	estar &= ~ESTAR_MODE_DIV_MASK;
-
-	/* This is based upon the state transition diagram in the IIe manual.  */
-	if (old_divisor == 2 && divisor == 1) {
-		self_refresh_ctl(0);
-		write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
-		frob_mem_refresh(0, clock_tick, old_divisor, divisor);
-	} else if (old_divisor == 1 && divisor == 2) {
-		frob_mem_refresh(1, clock_tick, old_divisor, divisor);
-		write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
-		self_refresh_ctl(1);
-	} else if (old_divisor == 1 && divisor > 2) {
-		us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
-				1, 2);
-		us2e_transition(estar, new_bits, clock_tick,
-				2, divisor);
-	} else if (old_divisor > 2 && divisor == 1) {
-		us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
-				old_divisor, 2);
-		us2e_transition(estar, new_bits, clock_tick,
-				2, divisor);
-	} else if (old_divisor < divisor) {
-		frob_mem_refresh(0, clock_tick, old_divisor, divisor);
-		write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
-	} else if (old_divisor > divisor) {
-		write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
-		frob_mem_refresh(1, clock_tick, old_divisor, divisor);
-	} else {
-		BUG();
-	}
-
-	local_irq_restore(flags);
-}
-
-static unsigned long index_to_estar_mode(unsigned int index)
-{
-	switch (index) {
-	case 0:
-		return ESTAR_MODE_DIV_1;
-
-	case 1:
-		return ESTAR_MODE_DIV_2;
-
-	case 2:
-		return ESTAR_MODE_DIV_4;
-
-	case 3:
-		return ESTAR_MODE_DIV_6;
-
-	case 4:
-		return ESTAR_MODE_DIV_8;
-
-	default:
-		BUG();
-	}
-}
-
-static unsigned long index_to_divisor(unsigned int index)
-{
-	switch (index) {
-	case 0:
-		return 1;
-
-	case 1:
-		return 2;
-
-	case 2:
-		return 4;
-
-	case 3:
-		return 6;
-
-	case 4:
-		return 8;
-
-	default:
-		BUG();
-	}
-}
-
-static unsigned long estar_to_divisor(unsigned long estar)
-{
-	unsigned long ret;
-
-	switch (estar & ESTAR_MODE_DIV_MASK) {
-	case ESTAR_MODE_DIV_1:
-		ret = 1;
-		break;
-	case ESTAR_MODE_DIV_2:
-		ret = 2;
-		break;
-	case ESTAR_MODE_DIV_4:
-		ret = 4;
-		break;
-	case ESTAR_MODE_DIV_6:
-		ret = 6;
-		break;
-	case ESTAR_MODE_DIV_8:
-		ret = 8;
-		break;
-	default:
-		BUG();
-	}
-
-	return ret;
-}
-
-static unsigned int us2e_freq_get(unsigned int cpu)
-{
-	cpumask_t cpus_allowed;
-	unsigned long clock_tick, estar;
-
-	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
-	set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
-	clock_tick = sparc64_get_clock_tick(cpu) / 1000;
-	estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
-
-	set_cpus_allowed_ptr(current, &cpus_allowed);
-
-	return clock_tick / estar_to_divisor(estar);
-}
-
-static void us2e_set_cpu_divider_index(struct cpufreq_policy *policy,
-		unsigned int index)
-{
-	unsigned int cpu = policy->cpu;
-	unsigned long new_bits, new_freq;
-	unsigned long clock_tick, divisor, old_divisor, estar;
-	cpumask_t cpus_allowed;
-	struct cpufreq_freqs freqs;
-
-	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
-	set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
-	new_freq = clock_tick = sparc64_get_clock_tick(cpu) / 1000;
-	new_bits = index_to_estar_mode(index);
-	divisor = index_to_divisor(index);
-	new_freq /= divisor;
-
-	estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
-
-	old_divisor = estar_to_divisor(estar);
-
-	freqs.old = clock_tick / old_divisor;
-	freqs.new = new_freq;
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
-	if (old_divisor != divisor)
-		us2e_transition(estar, new_bits, clock_tick * 1000,
-				old_divisor, divisor);
-
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
-	set_cpus_allowed_ptr(current, &cpus_allowed);
-}
-
-static int us2e_freq_target(struct cpufreq_policy *policy,
-			  unsigned int target_freq,
-			  unsigned int relation)
-{
-	unsigned int new_index = 0;
-
-	if (cpufreq_frequency_table_target(policy,
-					   &us2e_freq_table[policy->cpu].table[0],
-					   target_freq, relation, &new_index))
-		return -EINVAL;
-
-	us2e_set_cpu_divider_index(policy, new_index);
-
-	return 0;
-}
-
-static int us2e_freq_verify(struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy,
-					      &us2e_freq_table[policy->cpu].table[0]);
-}
-
-static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
-{
-	unsigned int cpu = policy->cpu;
-	unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
-	struct cpufreq_frequency_table *table =
-		&us2e_freq_table[cpu].table[0];
-
-	table[0].index = 0;
-	table[0].frequency = clock_tick / 1;
-	table[1].index = 1;
-	table[1].frequency = clock_tick / 2;
-	table[2].index = 2;
-	table[2].frequency = clock_tick / 4;
-	table[2].index = 3;
-	table[2].frequency = clock_tick / 6;
-	table[2].index = 4;
-	table[2].frequency = clock_tick / 8;
-	table[2].index = 5;
-	table[3].frequency = CPUFREQ_TABLE_END;
-
-	policy->cpuinfo.transition_latency = 0;
-	policy->cur = clock_tick;
-
-	return cpufreq_frequency_table_cpuinfo(policy, table);
-}
-
-static int us2e_freq_cpu_exit(struct cpufreq_policy *policy)
-{
-	if (cpufreq_us2e_driver)
-		us2e_set_cpu_divider_index(policy, 0);
-
-	return 0;
-}
-
-static int __init us2e_freq_init(void)
-{
-	unsigned long manuf, impl, ver;
-	int ret;
-
-	if (tlb_type != spitfire)
-		return -ENODEV;
-
-	__asm__("rdpr %%ver, %0" : "=r" (ver));
-	manuf = ((ver >> 48) & 0xffff);
-	impl  = ((ver >> 32) & 0xffff);
-
-	if (manuf == 0x17 && impl == 0x13) {
-		struct cpufreq_driver *driver;
-
-		ret = -ENOMEM;
-		driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
-		if (!driver)
-			goto err_out;
-
-		us2e_freq_table = kzalloc(
-			(NR_CPUS * sizeof(struct us2e_freq_percpu_info)),
-			GFP_KERNEL);
-		if (!us2e_freq_table)
-			goto err_out;
-
-		driver->init = us2e_freq_cpu_init;
-		driver->verify = us2e_freq_verify;
-		driver->target = us2e_freq_target;
-		driver->get = us2e_freq_get;
-		driver->exit = us2e_freq_cpu_exit;
-		driver->owner = THIS_MODULE,
-		strcpy(driver->name, "UltraSPARC-IIe");
-
-		cpufreq_us2e_driver = driver;
-		ret = cpufreq_register_driver(driver);
-		if (ret)
-			goto err_out;
-
-		return 0;
-
-err_out:
-		if (driver) {
-			kfree(driver);
-			cpufreq_us2e_driver = NULL;
-		}
-		kfree(us2e_freq_table);
-		us2e_freq_table = NULL;
-		return ret;
-	}
-
-	return -ENODEV;
-}
-
-static void __exit us2e_freq_exit(void)
-{
-	if (cpufreq_us2e_driver) {
-		cpufreq_unregister_driver(cpufreq_us2e_driver);
-		kfree(cpufreq_us2e_driver);
-		cpufreq_us2e_driver = NULL;
-		kfree(us2e_freq_table);
-		us2e_freq_table = NULL;
-	}
-}
-
-MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
-MODULE_DESCRIPTION("cpufreq driver for UltraSPARC-IIe");
-MODULE_LICENSE("GPL");
-
-module_init(us2e_freq_init);
-module_exit(us2e_freq_exit);