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authorViresh Kumar <viresh.kumar@linaro.org>2013-04-04 18:24:25 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-07 13:44:39 +0200
commit7fb6a53db58c729ff470095371f431b6d66c527b (patch)
tree57379088a169748c4335cbce7c5b76ab616d8392 /arch
parent7a4b35082c0f6997cb32b67a9cde169ec8e64706 (diff)
cpufreq: powerpc: move cpufreq driver to drivers/cpufreq
Move cpufreq driver of powerpc platform to drivers/cpufreq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/Kconfig31
-rw-r--r--arch/powerpc/platforms/pasemi/Makefile1
-rw-r--r--arch/powerpc/platforms/pasemi/cpufreq.c331
-rw-r--r--arch/powerpc/platforms/powermac/Makefile2
-rw-r--r--arch/powerpc/platforms/powermac/cpufreq_32.c721
-rw-r--r--arch/powerpc/platforms/powermac/cpufreq_64.c746
6 files changed, 0 insertions, 1832 deletions
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index b62aab3e22e..e17cdfc5ba4 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -193,37 +193,6 @@ config PPC_IO_WORKAROUNDS
source "drivers/cpufreq/Kconfig"
-menu "CPU Frequency drivers"
- depends on CPU_FREQ
-
-config CPU_FREQ_PMAC
- bool "Support for Apple PowerBooks"
- depends on ADB_PMU && PPC32
- select CPU_FREQ_TABLE
- help
- This adds support for frequency switching on Apple PowerBooks,
- this currently includes some models of iBook & Titanium
- PowerBook.
-
-config CPU_FREQ_PMAC64
- bool "Support for some Apple G5s"
- depends on PPC_PMAC && PPC64
- select CPU_FREQ_TABLE
- help
- This adds support for frequency switching on Apple iMac G5,
- and some of the more recent desktop G5 machines as well.
-
-config PPC_PASEMI_CPUFREQ
- bool "Support for PA Semi PWRficient"
- depends on PPC_PASEMI
- default y
- select CPU_FREQ_TABLE
- help
- This adds the support for frequency switching on PA Semi
- PWRficient processors.
-
-endmenu
-
menu "CPUIdle driver"
source "drivers/cpuidle/Kconfig"
diff --git a/arch/powerpc/platforms/pasemi/Makefile b/arch/powerpc/platforms/pasemi/Makefile
index ce6d789e074..8e8d4cae5eb 100644
--- a/arch/powerpc/platforms/pasemi/Makefile
+++ b/arch/powerpc/platforms/pasemi/Makefile
@@ -1,3 +1,2 @@
obj-y += setup.o pci.o time.o idle.o powersave.o iommu.o dma_lib.o misc.o
obj-$(CONFIG_PPC_PASEMI_MDIO) += gpio_mdio.o
-obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += cpufreq.o
diff --git a/arch/powerpc/platforms/pasemi/cpufreq.c b/arch/powerpc/platforms/pasemi/cpufreq.c
deleted file mode 100644
index b704da40406..00000000000
--- a/arch/powerpc/platforms/pasemi/cpufreq.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Copyright (C) 2007 PA Semi, Inc
- *
- * Authors: Egor Martovetsky <egor@pasemi.com>
- * Olof Johansson <olof@lixom.net>
- *
- * Maintained by: Olof Johansson <olof@lixom.net>
- *
- * Based on arch/powerpc/platforms/cell/cbe_cpufreq.c:
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/cpufreq.h>
-#include <linux/timer.h>
-#include <linux/module.h>
-
-#include <asm/hw_irq.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/time.h>
-#include <asm/smp.h>
-
-#define SDCASR_REG 0x0100
-#define SDCASR_REG_STRIDE 0x1000
-#define SDCPWR_CFGA0_REG 0x0100
-#define SDCPWR_PWST0_REG 0x0000
-#define SDCPWR_GIZTIME_REG 0x0440
-
-/* SDCPWR_GIZTIME_REG fields */
-#define SDCPWR_GIZTIME_GR 0x80000000
-#define SDCPWR_GIZTIME_LONGLOCK 0x000000ff
-
-/* Offset of ASR registers from SDC base */
-#define SDCASR_OFFSET 0x120000
-
-static void __iomem *sdcpwr_mapbase;
-static void __iomem *sdcasr_mapbase;
-
-static DEFINE_MUTEX(pas_switch_mutex);
-
-/* Current astate, is used when waking up from power savings on
- * one core, in case the other core has switched states during
- * the idle time.
- */
-static int current_astate;
-
-/* We support 5(A0-A4) power states excluding turbo(A5-A6) modes */
-static struct cpufreq_frequency_table pas_freqs[] = {
- {0, 0},
- {1, 0},
- {2, 0},
- {3, 0},
- {4, 0},
- {0, CPUFREQ_TABLE_END},
-};
-
-static struct freq_attr *pas_cpu_freqs_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-/*
- * hardware specific functions
- */
-
-static int get_astate_freq(int astate)
-{
- u32 ret;
- ret = in_le32(sdcpwr_mapbase + SDCPWR_CFGA0_REG + (astate * 0x10));
-
- return ret & 0x3f;
-}
-
-static int get_cur_astate(int cpu)
-{
- u32 ret;
-
- ret = in_le32(sdcpwr_mapbase + SDCPWR_PWST0_REG);
- ret = (ret >> (cpu * 4)) & 0x7;
-
- return ret;
-}
-
-static int get_gizmo_latency(void)
-{
- u32 giztime, ret;
-
- giztime = in_le32(sdcpwr_mapbase + SDCPWR_GIZTIME_REG);
-
- /* just provide the upper bound */
- if (giztime & SDCPWR_GIZTIME_GR)
- ret = (giztime & SDCPWR_GIZTIME_LONGLOCK) * 128000;
- else
- ret = (giztime & SDCPWR_GIZTIME_LONGLOCK) * 1000;
-
- return ret;
-}
-
-static void set_astate(int cpu, unsigned int astate)
-{
- unsigned long flags;
-
- /* Return if called before init has run */
- if (unlikely(!sdcasr_mapbase))
- return;
-
- local_irq_save(flags);
-
- out_le32(sdcasr_mapbase + SDCASR_REG + SDCASR_REG_STRIDE*cpu, astate);
-
- local_irq_restore(flags);
-}
-
-int check_astate(void)
-{
- return get_cur_astate(hard_smp_processor_id());
-}
-
-void restore_astate(int cpu)
-{
- set_astate(cpu, current_astate);
-}
-
-/*
- * cpufreq functions
- */
-
-static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- const u32 *max_freqp;
- u32 max_freq;
- int i, cur_astate;
- struct resource res;
- struct device_node *cpu, *dn;
- int err = -ENODEV;
-
- cpu = of_get_cpu_node(policy->cpu, NULL);
-
- if (!cpu)
- goto out;
-
- dn = of_find_compatible_node(NULL, NULL, "1682m-sdc");
- if (!dn)
- dn = of_find_compatible_node(NULL, NULL,
- "pasemi,pwrficient-sdc");
- if (!dn)
- goto out;
- err = of_address_to_resource(dn, 0, &res);
- of_node_put(dn);
- if (err)
- goto out;
- sdcasr_mapbase = ioremap(res.start + SDCASR_OFFSET, 0x2000);
- if (!sdcasr_mapbase) {
- err = -EINVAL;
- goto out;
- }
-
- dn = of_find_compatible_node(NULL, NULL, "1682m-gizmo");
- if (!dn)
- dn = of_find_compatible_node(NULL, NULL,
- "pasemi,pwrficient-gizmo");
- if (!dn) {
- err = -ENODEV;
- goto out_unmap_sdcasr;
- }
- err = of_address_to_resource(dn, 0, &res);
- of_node_put(dn);
- if (err)
- goto out_unmap_sdcasr;
- sdcpwr_mapbase = ioremap(res.start, 0x1000);
- if (!sdcpwr_mapbase) {
- err = -EINVAL;
- goto out_unmap_sdcasr;
- }
-
- pr_debug("init cpufreq on CPU %d\n", policy->cpu);
-
- max_freqp = of_get_property(cpu, "clock-frequency", NULL);
- if (!max_freqp) {
- err = -EINVAL;
- goto out_unmap_sdcpwr;
- }
-
- /* we need the freq in kHz */
- max_freq = *max_freqp / 1000;
-
- pr_debug("max clock-frequency is at %u kHz\n", max_freq);
- pr_debug("initializing frequency table\n");
-
- /* initialize frequency table */
- for (i=0; pas_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
- pas_freqs[i].frequency =
- get_astate_freq(pas_freqs[i].driver_data) * 100000;
- pr_debug("%d: %d\n", i, pas_freqs[i].frequency);
- }
-
- policy->cpuinfo.transition_latency = get_gizmo_latency();
-
- cur_astate = get_cur_astate(policy->cpu);
- pr_debug("current astate is at %d\n",cur_astate);
-
- policy->cur = pas_freqs[cur_astate].frequency;
- cpumask_copy(policy->cpus, cpu_online_mask);
-
- ppc_proc_freq = policy->cur * 1000ul;
-
- cpufreq_frequency_table_get_attr(pas_freqs, policy->cpu);
-
- /* this ensures that policy->cpuinfo_min and policy->cpuinfo_max
- * are set correctly
- */
- return cpufreq_frequency_table_cpuinfo(policy, pas_freqs);
-
-out_unmap_sdcpwr:
- iounmap(sdcpwr_mapbase);
-
-out_unmap_sdcasr:
- iounmap(sdcasr_mapbase);
-out:
- return err;
-}
-
-static int pas_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- /*
- * We don't support CPU hotplug. Don't unmap after the system
- * has already made it to a running state.
- */
- if (system_state != SYSTEM_BOOTING)
- return 0;
-
- if (sdcasr_mapbase)
- iounmap(sdcasr_mapbase);
- if (sdcpwr_mapbase)
- iounmap(sdcpwr_mapbase);
-
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-static int pas_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, pas_freqs);
-}
-
-static int pas_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- struct cpufreq_freqs freqs;
- int pas_astate_new;
- int i;
-
- cpufreq_frequency_table_target(policy,
- pas_freqs,
- target_freq,
- relation,
- &pas_astate_new);
-
- freqs.old = policy->cur;
- freqs.new = pas_freqs[pas_astate_new].frequency;
-
- mutex_lock(&pas_switch_mutex);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- pr_debug("setting frequency for cpu %d to %d kHz, 1/%d of max frequency\n",
- policy->cpu,
- pas_freqs[pas_astate_new].frequency,
- pas_freqs[pas_astate_new].driver_data);
-
- current_astate = pas_astate_new;
-
- for_each_online_cpu(i)
- set_astate(i, pas_astate_new);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- mutex_unlock(&pas_switch_mutex);
-
- ppc_proc_freq = freqs.new * 1000ul;
- return 0;
-}
-
-static struct cpufreq_driver pas_cpufreq_driver = {
- .name = "pas-cpufreq",
- .owner = THIS_MODULE,
- .flags = CPUFREQ_CONST_LOOPS,
- .init = pas_cpufreq_cpu_init,
- .exit = pas_cpufreq_cpu_exit,
- .verify = pas_cpufreq_verify,
- .target = pas_cpufreq_target,
- .attr = pas_cpu_freqs_attr,
-};
-
-/*
- * module init and destoy
- */
-
-static int __init pas_cpufreq_init(void)
-{
- if (!of_machine_is_compatible("PA6T-1682M") &&
- !of_machine_is_compatible("pasemi,pwrficient"))
- return -ENODEV;
-
- return cpufreq_register_driver(&pas_cpufreq_driver);
-}
-
-static void __exit pas_cpufreq_exit(void)
-{
- cpufreq_unregister_driver(&pas_cpufreq_driver);
-}
-
-module_init(pas_cpufreq_init);
-module_exit(pas_cpufreq_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>, Olof Johansson <olof@lixom.net>");
diff --git a/arch/powerpc/platforms/powermac/Makefile b/arch/powerpc/platforms/powermac/Makefile
index ea47df66fee..52c6ce1cc98 100644
--- a/arch/powerpc/platforms/powermac/Makefile
+++ b/arch/powerpc/platforms/powermac/Makefile
@@ -9,8 +9,6 @@ obj-y += pic.o setup.o time.o feature.o pci.o \
sleep.o low_i2c.o cache.o pfunc_core.o \
pfunc_base.o udbg_scc.o udbg_adb.o
obj-$(CONFIG_PMAC_BACKLIGHT) += backlight.o
-obj-$(CONFIG_CPU_FREQ_PMAC) += cpufreq_32.o
-obj-$(CONFIG_CPU_FREQ_PMAC64) += cpufreq_64.o
# CONFIG_NVRAM is an arch. independent tristate symbol, for pmac32 we really
# need this to be a bool. Cheat here and pretend CONFIG_NVRAM=m is really
# CONFIG_NVRAM=y
diff --git a/arch/powerpc/platforms/powermac/cpufreq_32.c b/arch/powerpc/platforms/powermac/cpufreq_32.c
deleted file mode 100644
index 3104fad8248..00000000000
--- a/arch/powerpc/platforms/powermac/cpufreq_32.c
+++ /dev/null
@@ -1,721 +0,0 @@
-/*
- * Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>
- * Copyright (C) 2004 John Steele Scott <toojays@toojays.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * TODO: Need a big cleanup here. Basically, we need to have different
- * cpufreq_driver structures for the different type of HW instead of the
- * current mess. We also need to better deal with the detection of the
- * type of machine.
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/adb.h>
-#include <linux/pmu.h>
-#include <linux/cpufreq.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/hardirq.h>
-#include <asm/prom.h>
-#include <asm/machdep.h>
-#include <asm/irq.h>
-#include <asm/pmac_feature.h>
-#include <asm/mmu_context.h>
-#include <asm/sections.h>
-#include <asm/cputable.h>
-#include <asm/time.h>
-#include <asm/mpic.h>
-#include <asm/keylargo.h>
-#include <asm/switch_to.h>
-
-/* WARNING !!! This will cause calibrate_delay() to be called,
- * but this is an __init function ! So you MUST go edit
- * init/main.c to make it non-init before enabling DEBUG_FREQ
- */
-#undef DEBUG_FREQ
-
-extern void low_choose_7447a_dfs(int dfs);
-extern void low_choose_750fx_pll(int pll);
-extern void low_sleep_handler(void);
-
-/*
- * Currently, PowerMac cpufreq supports only high & low frequencies
- * that are set by the firmware
- */
-static unsigned int low_freq;
-static unsigned int hi_freq;
-static unsigned int cur_freq;
-static unsigned int sleep_freq;
-static unsigned long transition_latency;
-
-/*
- * Different models uses different mechanisms to switch the frequency
- */
-static int (*set_speed_proc)(int low_speed);
-static unsigned int (*get_speed_proc)(void);
-
-/*
- * Some definitions used by the various speedprocs
- */
-static u32 voltage_gpio;
-static u32 frequency_gpio;
-static u32 slew_done_gpio;
-static int no_schedule;
-static int has_cpu_l2lve;
-static int is_pmu_based;
-
-/* There are only two frequency states for each processor. Values
- * are in kHz for the time being.
- */
-#define CPUFREQ_HIGH 0
-#define CPUFREQ_LOW 1
-
-static struct cpufreq_frequency_table pmac_cpu_freqs[] = {
- {CPUFREQ_HIGH, 0},
- {CPUFREQ_LOW, 0},
- {0, CPUFREQ_TABLE_END},
-};
-
-static struct freq_attr* pmac_cpu_freqs_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static inline void local_delay(unsigned long ms)
-{
- if (no_schedule)
- mdelay(ms);
- else
- msleep(ms);
-}
-
-#ifdef DEBUG_FREQ
-static inline void debug_calc_bogomips(void)
-{
- /* This will cause a recalc of bogomips and display the
- * result. We backup/restore the value to avoid affecting the
- * core cpufreq framework's own calculation.
- */
- unsigned long save_lpj = loops_per_jiffy;
- calibrate_delay();
- loops_per_jiffy = save_lpj;
-}
-#endif /* DEBUG_FREQ */
-
-/* Switch CPU speed under 750FX CPU control
- */
-static int cpu_750fx_cpu_speed(int low_speed)
-{
- u32 hid2;
-
- if (low_speed == 0) {
- /* ramping up, set voltage first */
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x05);
- /* Make sure we sleep for at least 1ms */
- local_delay(10);
-
- /* tweak L2 for high voltage */
- if (has_cpu_l2lve) {
- hid2 = mfspr(SPRN_HID2);
- hid2 &= ~0x2000;
- mtspr(SPRN_HID2, hid2);
- }
- }
-#ifdef CONFIG_6xx
- low_choose_750fx_pll(low_speed);
-#endif
- if (low_speed == 1) {
- /* tweak L2 for low voltage */
- if (has_cpu_l2lve) {
- hid2 = mfspr(SPRN_HID2);
- hid2 |= 0x2000;
- mtspr(SPRN_HID2, hid2);
- }
-
- /* ramping down, set voltage last */
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x04);
- local_delay(10);
- }
-
- return 0;
-}
-
-static unsigned int cpu_750fx_get_cpu_speed(void)
-{
- if (mfspr(SPRN_HID1) & HID1_PS)
- return low_freq;
- else
- return hi_freq;
-}
-
-/* Switch CPU speed using DFS */
-static int dfs_set_cpu_speed(int low_speed)
-{
- if (low_speed == 0) {
- /* ramping up, set voltage first */
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x05);
- /* Make sure we sleep for at least 1ms */
- local_delay(1);
- }
-
- /* set frequency */
-#ifdef CONFIG_6xx
- low_choose_7447a_dfs(low_speed);
-#endif
- udelay(100);
-
- if (low_speed == 1) {
- /* ramping down, set voltage last */
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x04);
- local_delay(1);
- }
-
- return 0;
-}
-
-static unsigned int dfs_get_cpu_speed(void)
-{
- if (mfspr(SPRN_HID1) & HID1_DFS)
- return low_freq;
- else
- return hi_freq;
-}
-
-
-/* Switch CPU speed using slewing GPIOs
- */
-static int gpios_set_cpu_speed(int low_speed)
-{
- int gpio, timeout = 0;
-
- /* If ramping up, set voltage first */
- if (low_speed == 0) {
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x05);
- /* Delay is way too big but it's ok, we schedule */
- local_delay(10);
- }
-
- /* Set frequency */
- gpio = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, frequency_gpio, 0);
- if (low_speed == ((gpio & 0x01) == 0))
- goto skip;
-
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, frequency_gpio,
- low_speed ? 0x04 : 0x05);
- udelay(200);
- do {
- if (++timeout > 100)
- break;
- local_delay(1);
- gpio = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, slew_done_gpio, 0);
- } while((gpio & 0x02) == 0);
- skip:
- /* If ramping down, set voltage last */
- if (low_speed == 1) {
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, voltage_gpio, 0x04);
- /* Delay is way too big but it's ok, we schedule */
- local_delay(10);
- }
-
-#ifdef DEBUG_FREQ
- debug_calc_bogomips();
-#endif
-
- return 0;
-}
-
-/* Switch CPU speed under PMU control
- */
-static int pmu_set_cpu_speed(int low_speed)
-{
- struct adb_request req;
- unsigned long save_l2cr;
- unsigned long save_l3cr;
- unsigned int pic_prio;
- unsigned long flags;
-
- preempt_disable();
-
-#ifdef DEBUG_FREQ
- printk(KERN_DEBUG "HID1, before: %x\n", mfspr(SPRN_HID1));
-#endif
- pmu_suspend();
-
- /* Disable all interrupt sources on openpic */
- pic_prio = mpic_cpu_get_priority();
- mpic_cpu_set_priority(0xf);
-
- /* Make sure the decrementer won't interrupt us */
- asm volatile("mtdec %0" : : "r" (0x7fffffff));
- /* Make sure any pending DEC interrupt occurring while we did
- * the above didn't re-enable the DEC */
- mb();
- asm volatile("mtdec %0" : : "r" (0x7fffffff));
-
- /* We can now disable MSR_EE */
- local_irq_save(flags);
-
- /* Giveup the FPU & vec */
- enable_kernel_fp();
-
-#ifdef CONFIG_ALTIVEC
- if (cpu_has_feature(CPU_FTR_ALTIVEC))
- enable_kernel_altivec();
-#endif /* CONFIG_ALTIVEC */
-
- /* Save & disable L2 and L3 caches */
- save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
- save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
-
- /* Send the new speed command. My assumption is that this command
- * will cause PLL_CFG[0..3] to be changed next time CPU goes to sleep
- */
- pmu_request(&req, NULL, 6, PMU_CPU_SPEED, 'W', 'O', 'O', 'F', low_speed);
- while (!req.complete)
- pmu_poll();
-
- /* Prepare the northbridge for the speed transition */
- pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,1,1);
-
- /* Call low level code to backup CPU state and recover from
- * hardware reset
- */
- low_sleep_handler();
-
- /* Restore the northbridge */
- pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,1,0);
-
- /* Restore L2 cache */
- if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
- _set_L2CR(save_l2cr);
- /* Restore L3 cache */
- if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
- _set_L3CR(save_l3cr);
-
- /* Restore userland MMU context */
- switch_mmu_context(NULL, current->active_mm);
-
-#ifdef DEBUG_FREQ
- printk(KERN_DEBUG "HID1, after: %x\n", mfspr(SPRN_HID1));
-#endif
-
- /* Restore low level PMU operations */
- pmu_unlock();
-
- /*
- * Restore decrementer; we'll take a decrementer interrupt
- * as soon as interrupts are re-enabled and the generic
- * clockevents code will reprogram it with the right value.
- */
- set_dec(1);
-
- /* Restore interrupts */
- mpic_cpu_set_priority(pic_prio);
-
- /* Let interrupts flow again ... */
- local_irq_restore(flags);
-
-#ifdef DEBUG_FREQ
- debug_calc_bogomips();
-#endif
-
- pmu_resume();
-
- preempt_enable();
-
- return 0;
-}
-
-static int do_set_cpu_speed(struct cpufreq_policy *policy, int speed_mode,
- int notify)
-{
- struct cpufreq_freqs freqs;
- unsigned long l3cr;
- static unsigned long prev_l3cr;
-
- freqs.old = cur_freq;
- freqs.new = (speed_mode == CPUFREQ_HIGH) ? hi_freq : low_freq;
-
- if (freqs.old == freqs.new)
- return 0;
-
- if (notify)
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- if (speed_mode == CPUFREQ_LOW &&
- cpu_has_feature(CPU_FTR_L3CR)) {
- l3cr = _get_L3CR();
- if (l3cr & L3CR_L3E) {
- prev_l3cr = l3cr;
- _set_L3CR(0);
- }
- }
- set_speed_proc(speed_mode == CPUFREQ_LOW);
- if (speed_mode == CPUFREQ_HIGH &&
- cpu_has_feature(CPU_FTR_L3CR)) {
- l3cr = _get_L3CR();
- if ((prev_l3cr & L3CR_L3E) && l3cr != prev_l3cr)
- _set_L3CR(prev_l3cr);
- }
- if (notify)
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- cur_freq = (speed_mode == CPUFREQ_HIGH) ? hi_freq : low_freq;
-
- return 0;
-}
-
-static unsigned int pmac_cpufreq_get_speed(unsigned int cpu)
-{
- return cur_freq;
-}
-
-static int pmac_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, pmac_cpu_freqs);
-}
-
-static int pmac_cpufreq_target( struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int newstate = 0;
- int rc;
-
- if (cpufreq_frequency_table_target(policy, pmac_cpu_freqs,
- target_freq, relation, &newstate))
- return -EINVAL;
-
- rc = do_set_cpu_speed(policy, newstate, 1);
-
- ppc_proc_freq = cur_freq * 1000ul;
- return rc;
-}
-
-static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- if (policy->cpu != 0)
- return -ENODEV;
-
- policy->cpuinfo.transition_latency = transition_latency;
- policy->cur = cur_freq;
-
- cpufreq_frequency_table_get_attr(pmac_cpu_freqs, policy->cpu);
- return cpufreq_frequency_table_cpuinfo(policy, pmac_cpu_freqs);
-}
-
-static u32 read_gpio(struct device_node *np)
-{
- const u32 *reg = of_get_property(np, "reg", NULL);
- u32 offset;
-
- if (reg == NULL)
- return 0;
- /* That works for all keylargos but shall be fixed properly
- * some day... The problem is that it seems we can't rely
- * on the "reg" property of the GPIO nodes, they are either
- * relative to the base of KeyLargo or to the base of the
- * GPIO space, and the device-tree doesn't help.
- */
- offset = *reg;
- if (offset < KEYLARGO_GPIO_LEVELS0)
- offset += KEYLARGO_GPIO_LEVELS0;
- return offset;
-}
-
-static int pmac_cpufreq_suspend(struct cpufreq_policy *policy)
-{
- /* Ok, this could be made a bit smarter, but let's be robust for now. We
- * always force a speed change to high speed before sleep, to make sure
- * we have appropriate voltage and/or bus speed for the wakeup process,
- * and to make sure our loops_per_jiffies are "good enough", that is will
- * not cause too short delays if we sleep in low speed and wake in high
- * speed..
- */
- no_schedule = 1;
- sleep_freq = cur_freq;
- if (cur_freq == low_freq && !is_pmu_based)
- do_set_cpu_speed(policy, CPUFREQ_HIGH, 0);
- return 0;
-}
-
-static int pmac_cpufreq_resume(struct cpufreq_policy *policy)
-{
- /* If we resume, first check if we have a get() function */
- if (get_speed_proc)
- cur_freq = get_speed_proc();
- else
- cur_freq = 0;
-
- /* We don't, hrm... we don't really know our speed here, best
- * is that we force a switch to whatever it was, which is
- * probably high speed due to our suspend() routine
- */
- do_set_cpu_speed(policy, sleep_freq == low_freq ?
- CPUFREQ_LOW : CPUFREQ_HIGH, 0);
-
- ppc_proc_freq = cur_freq * 1000ul;
-
- no_schedule = 0;
- return 0;
-}
-
-static struct cpufreq_driver pmac_cpufreq_driver = {
- .verify = pmac_cpufreq_verify,
- .target = pmac_cpufreq_target,
- .get = pmac_cpufreq_get_speed,
- .init = pmac_cpufreq_cpu_init,
- .suspend = pmac_cpufreq_suspend,
- .resume = pmac_cpufreq_resume,
- .flags = CPUFREQ_PM_NO_WARN,
- .attr = pmac_cpu_freqs_attr,
- .name = "powermac",
- .owner = THIS_MODULE,
-};
-
-
-static int pmac_cpufreq_init_MacRISC3(struct device_node *cpunode)
-{
- struct device_node *volt_gpio_np = of_find_node_by_name(NULL,
- "voltage-gpio");
- struct device_node *freq_gpio_np = of_find_node_by_name(NULL,
- "frequency-gpio");
- struct device_node *slew_done_gpio_np = of_find_node_by_name(NULL,
- "slewing-done");
- const u32 *value;
-
- /*
- * Check to see if it's GPIO driven or PMU only
- *
- * The way we extract the GPIO address is slightly hackish, but it
- * works well enough for now. We need to abstract the whole GPIO
- * stuff sooner or later anyway
- */
-
- if (volt_gpio_np)
- voltage_gpio = read_gpio(volt_gpio_np);
- if (freq_gpio_np)
- frequency_gpio = read_gpio(freq_gpio_np);
- if (slew_done_gpio_np)
- slew_done_gpio = read_gpio(slew_done_gpio_np);
-
- /* If we use the frequency GPIOs, calculate the min/max speeds based
- * on the bus frequencies
- */
- if (frequency_gpio && slew_done_gpio) {
- int lenp, rc;
- const u32 *freqs, *ratio;
-
- freqs = of_get_property(cpunode, "bus-frequencies", &lenp);
- lenp /= sizeof(u32);
- if (freqs == NULL || lenp != 2) {
- printk(KERN_ERR "cpufreq: bus-frequencies incorrect or missing\n");
- return 1;
- }
- ratio = of_get_property(cpunode, "processor-to-bus-ratio*2",
- NULL);
- if (ratio == NULL) {
- printk(KERN_ERR "cpufreq: processor-to-bus-ratio*2 missing\n");
- return 1;
- }
-
- /* Get the min/max bus frequencies */
- low_freq = min(freqs[0], freqs[1]);
- hi_freq = max(freqs[0], freqs[1]);
-
- /* Grrrr.. It _seems_ that the device-tree is lying on the low bus
- * frequency, it claims it to be around 84Mhz on some models while
- * it appears to be approx. 101Mhz on all. Let's hack around here...
- * fortunately, we don't need to be too precise
- */
- if (low_freq < 98000000)
- low_freq = 101000000;
-
- /* Convert those to CPU core clocks */
- low_freq = (low_freq * (*ratio)) / 2000;
- hi_freq = (hi_freq * (*ratio)) / 2000;
-
- /* Now we get the frequencies, we read the GPIO to see what is out current
- * speed
- */
- rc = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, frequency_gpio, 0);
- cur_freq = (rc & 0x01) ? hi_freq : low_freq;
-
- set_speed_proc = gpios_set_cpu_speed;
- return 1;
- }
-
- /* If we use the PMU, look for the min & max frequencies in the
- * device-tree
- */
- value = of_get_property(cpunode, "min-clock-frequency", NULL);
- if (!value)
- return 1;
- low_freq = (*value) / 1000;
- /* The PowerBook G4 12" (PowerBook6,1) has an error in the device-tree
- * here */
- if (low_freq < 100000)
- low_freq *= 10;
-
- value = of_get_property(cpunode, "max-clock-frequency", NULL);
- if (!value)
- return 1;
- hi_freq = (*value) / 1000;
- set_speed_proc = pmu_set_cpu_speed;
- is_pmu_based = 1;
-
- return 0;
-}
-
-static int pmac_cpufreq_init_7447A(struct device_node *cpunode)
-{
- struct device_node *volt_gpio_np;
-
- if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
- return 1;
-
- volt_gpio_np = of_find_node_by_name(NULL, "cpu-vcore-select");
- if (volt_gpio_np)
- voltage_gpio = read_gpio(volt_gpio_np);
- if (!voltage_gpio){
- printk(KERN_ERR "cpufreq: missing cpu-vcore-select gpio\n");
- return 1;
- }
-
- /* OF only reports the high frequency */
- hi_freq = cur_freq;
- low_freq = cur_freq/2;
-
- /* Read actual frequency from CPU */
- cur_freq = dfs_get_cpu_speed();
- set_speed_proc = dfs_set_cpu_speed;
- get_speed_proc = dfs_get_cpu_speed;
-
- return 0;
-}
-
-static int pmac_cpufreq_init_750FX(struct device_node *cpunode)
-{
- struct device_node *volt_gpio_np;
- u32 pvr;
- const u32 *value;
-
- if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
- return 1;
-
- hi_freq = cur_freq;
- value = of_get_property(cpunode, "reduced-clock-frequency", NULL);
- if (!value)
- return 1;
- low_freq = (*value) / 1000;
-
- volt_gpio_np = of_find_node_by_name(NULL, "cpu-vcore-select");
- if (volt_gpio_np)
- voltage_gpio = read_gpio(volt_gpio_np);
-
- pvr = mfspr(SPRN_PVR);
- has_cpu_l2lve = !((pvr & 0xf00) == 0x100);
-
- set_speed_proc = cpu_750fx_cpu_speed;
- get_speed_proc = cpu_750fx_get_cpu_speed;
- cur_freq = cpu_750fx_get_cpu_speed();
-
- return 0;
-}
-
-/* Currently, we support the following machines:
- *
- * - Titanium PowerBook 1Ghz (PMU based, 667Mhz & 1Ghz)
- * - Titanium PowerBook 800 (PMU based, 667Mhz & 800Mhz)
- * - Titanium PowerBook 400 (PMU based, 300Mhz & 400Mhz)
- * - Titanium PowerBook 500 (PMU based, 300Mhz & 500Mhz)
- * - iBook2 500/600 (PMU based, 400Mhz & 500/600Mhz)
- * - iBook2 700 (CPU based, 400Mhz & 700Mhz, support low voltage)
- * - Recent MacRISC3 laptops
- * - All new machines with 7447A CPUs
- */
-static int __init pmac_cpufreq_setup(void)
-{
- struct device_node *cpunode;
- const u32 *value;
-
- if (strstr(cmd_line, "nocpufreq"))
- return 0;
-
- /* Assume only one CPU */
- cpunode = of_find_node_by_type(NULL, "cpu");
- if (!cpunode)
- goto out;
-
- /* Get current cpu clock freq */
- value = of_get_property(cpunode, "clock-frequency", NULL);
- if (!value)
- goto out;
- cur_freq = (*value) / 1000;
- transition_latency = CPUFREQ_ETERNAL;
-
- /* Check for 7447A based MacRISC3 */
- if (of_machine_is_compatible("MacRISC3") &&
- of_get_property(cpunode, "dynamic-power-step", NULL) &&
- PVR_VER(mfspr(SPRN_PVR)) == 0x8003) {
- pmac_cpufreq_init_7447A(cpunode);
- transition_latency = 8000000;
- /* Check for other MacRISC3 machines */
- } else if (of_machine_is_compatible("PowerBook3,4") ||
- of_machine_is_compatible("PowerBook3,5") ||
- of_machine_is_compatible("MacRISC3")) {
- pmac_cpufreq_init_MacRISC3(cpunode);
- /* Else check for iBook2 500/600 */
- } else if (of_machine_is_compatible("PowerBook4,1")) {
- hi_freq = cur_freq;
- low_freq = 400000;
- set_speed_proc = pmu_set_cpu_speed;
- is_pmu_based = 1;
- }
- /* Else check for TiPb 550 */
- else if (of_machine_is_compatible("PowerBook3,3") && cur_freq == 550000) {
- hi_freq = cur_freq;
- low_freq = 500000;
- set_speed_proc = pmu_set_cpu_speed;
- is_pmu_based = 1;
- }
- /* Else check for TiPb 400 & 500 */
- else if (of_machine_is_compatible("PowerBook3,2")) {
- /* We only know about the 400 MHz and the 500Mhz model
- * they both have 300 MHz as low frequency
- */
- if (cur_freq < 350000 || cur_freq > 550000)
- goto out;
- hi_freq = cur_freq;
- low_freq = 300000;
- set_speed_proc = pmu_set_cpu_speed;
- is_pmu_based = 1;
- }
- /* Else check for 750FX */
- else if (PVR_VER(mfspr(SPRN_PVR)) == 0x7000)
- pmac_cpufreq_init_750FX(cpunode);
-out:
- of_node_put(cpunode);
- if (set_speed_proc == NULL)
- return -ENODEV;
-
- pmac_cpu_freqs[CPUFREQ_LOW].frequency = low_freq;
- pmac_cpu_freqs[CPUFREQ_HIGH].frequency = hi_freq;
- ppc_proc_freq = cur_freq * 1000ul;
-
- printk(KERN_INFO "Registering PowerMac CPU frequency driver\n");
- printk(KERN_INFO "Low: %d Mhz, High: %d Mhz, Boot: %d Mhz\n",
- low_freq/1000, hi_freq/1000, cur_freq/1000);
-
- return cpufreq_register_driver(&pmac_cpufreq_driver);
-}
-
-module_init(pmac_cpufreq_setup);
-
diff --git a/arch/powerpc/platforms/powermac/cpufreq_64.c b/arch/powerpc/platforms/powermac/cpufreq_64.c
deleted file mode 100644
index 7ba423431cf..00000000000
--- a/arch/powerpc/platforms/powermac/cpufreq_64.c
+++ /dev/null
@@ -1,746 +0,0 @@
-/*
- * Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>
- * and Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This driver adds basic cpufreq support for SMU & 970FX based G5 Macs,
- * that is iMac G5 and latest single CPU desktop.
- */
-
-#undef DEBUG
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/cpufreq.h>
-#include <linux/init.h>
-#include <linux/completion.h>
-#include <linux/mutex.h>
-#include <asm/prom.h>
-#include <asm/machdep.h>
-#include <asm/irq.h>
-#include <asm/sections.h>
-#include <asm/cputable.h>
-#include <asm/time.h>
-#include <asm/smu.h>
-#include <asm/pmac_pfunc.h>
-
-#define DBG(fmt...) pr_debug(fmt)
-
-/* see 970FX user manual */
-
-#define SCOM_PCR 0x0aa001 /* PCR scom addr */
-
-#define PCR_HILO_SELECT 0x80000000U /* 1 = PCR, 0 = PCRH */
-#define PCR_SPEED_FULL 0x00000000U /* 1:1 speed value */
-#define PCR_SPEED_HALF 0x00020000U /* 1:2 speed value */
-#define PCR_SPEED_QUARTER 0x00040000U /* 1:4 speed value */
-#define PCR_SPEED_MASK 0x000e0000U /* speed mask */
-#define PCR_SPEED_SHIFT 17
-#define PCR_FREQ_REQ_VALID 0x00010000U /* freq request valid */
-#define PCR_VOLT_REQ_VALID 0x00008000U /* volt request valid */
-#define PCR_TARGET_TIME_MASK 0x00006000U /* target time */
-#define PCR_STATLAT_MASK 0x00001f00U /* STATLAT value */
-#define PCR_SNOOPLAT_MASK 0x000000f0U /* SNOOPLAT value */
-#define PCR_SNOOPACC_MASK 0x0000000fU /* SNOOPACC value */
-
-#define SCOM_PSR 0x408001 /* PSR scom addr */
-/* warning: PSR is a 64 bits register */
-#define PSR_CMD_RECEIVED 0x2000000000000000U /* command received */
-#define PSR_CMD_COMPLETED 0x1000000000000000U /* command completed */
-#define PSR_CUR_SPEED_MASK 0x0300000000000000U /* current speed */
-#define PSR_CUR_SPEED_SHIFT (56)
-
-/*
- * The G5 only supports two frequencies (Quarter speed is not supported)
- */
-#define CPUFREQ_HIGH 0
-#define CPUFREQ_LOW 1
-
-static struct cpufreq_frequency_table g5_cpu_freqs[] = {
- {CPUFREQ_HIGH, 0},
- {CPUFREQ_LOW, 0},
- {0, CPUFREQ_TABLE_END},
-};
-
-static struct freq_attr* g5_cpu_freqs_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-/* Power mode data is an array of the 32 bits PCR values to use for
- * the various frequencies, retrieved from the device-tree
- */
-static int g5_pmode_cur;
-
-static void (*g5_switch_volt)(int speed_mode);
-static int (*g5_switch_freq)(int speed_mode);
-static int (*g5_query_freq)(void);
-
-static DEFINE_MUTEX(g5_switch_mutex);
-
-static unsigned long transition_latency;
-
-#ifdef CONFIG_PMAC_SMU
-
-static const u32 *g5_pmode_data;
-static int g5_pmode_max;
-
-static struct smu_sdbp_fvt *g5_fvt_table; /* table of op. points */
-static int g5_fvt_count; /* number of op. points */
-static int g5_fvt_cur; /* current op. point */
-
-/*
- * SMU based voltage switching for Neo2 platforms
- */
-
-static void g5_smu_switch_volt(int speed_mode)
-{
- struct smu_simple_cmd cmd;
-
- DECLARE_COMPLETION_ONSTACK(comp);
- smu_queue_simple(&cmd, SMU_CMD_POWER_COMMAND, 8, smu_done_complete,
- &comp, 'V', 'S', 'L', 'E', 'W',
- 0xff, g5_fvt_cur+1, speed_mode);
- wait_for_completion(&comp);
-}
-
-/*
- * Platform function based voltage/vdnap switching for Neo2
- */
-
-static struct pmf_function *pfunc_set_vdnap0;
-static struct pmf_function *pfunc_vdnap0_complete;
-
-static void g5_vdnap_switch_volt(int speed_mode)
-{
- struct pmf_args args;
- u32 slew, done = 0;
- unsigned long timeout;
-
- slew = (speed_mode == CPUFREQ_LOW) ? 1 : 0;
- args.count = 1;
- args.u[0].p = &slew;
-
- pmf_call_one(pfunc_set_vdnap0, &args);
-
- /* It's an irq GPIO so we should be able to just block here,
- * I'll do that later after I've properly tested the IRQ code for
- * platform functions
- */
- timeout = jiffies + HZ/10;
- while(!time_after(jiffies, timeout)) {
- args.count = 1;
- args.u[0].p = &done;
- pmf_call_one(pfunc_vdnap0_complete, &args);
- if (done)
- break;
- msleep(1);
- }
- if (done == 0)
- printk(KERN_WARNING "cpufreq: Timeout in clock slewing !\n");
-}
-
-
-/*
- * SCOM based frequency switching for 970FX rev3
- */
-static int g5_scom_switch_freq(int speed_mode)
-{
- unsigned long flags;
- int to;
-
- /* If frequency is going up, first ramp up the voltage */
- if (speed_mode < g5_pmode_cur)
- g5_switch_volt(speed_mode);
-
- local_irq_save(flags);
-
- /* Clear PCR high */
- scom970_write(SCOM_PCR, 0);
- /* Clear PCR low */
- scom970_write(SCOM_PCR, PCR_HILO_SELECT | 0);
- /* Set PCR low */
- scom970_write(SCOM_PCR, PCR_HILO_SELECT |
- g5_pmode_data[speed_mode]);
-
- /* Wait for completion */
- for (to = 0; to < 10; to++) {
- unsigned long psr = scom970_read(SCOM_PSR);
-
- if ((psr & PSR_CMD_RECEIVED) == 0 &&
- (((psr >> PSR_CUR_SPEED_SHIFT) ^
- (g5_pmode_data[speed_mode] >> PCR_SPEED_SHIFT)) & 0x3)
- == 0)
- break;
- if (psr & PSR_CMD_COMPLETED)
- break;
- udelay(100);
- }
-
- local_irq_restore(flags);
-
- /* If frequency is going down, last ramp the voltage */
- if (speed_mode > g5_pmode_cur)
- g5_switch_volt(speed_mode);
-
- g5_pmode_cur = speed_mode;
- ppc_proc_freq = g5_cpu_freqs[speed_mode].frequency * 1000ul;
-
- return 0;
-}
-
-static int g5_scom_query_freq(void)
-{
- unsigned long psr = scom970_read(SCOM_PSR);
- int i;
-
- for (i = 0; i <= g5_pmode_max; i++)
- if ((((psr >> PSR_CUR_SPEED_SHIFT) ^
- (g5_pmode_data[i] >> PCR_SPEED_SHIFT)) & 0x3) == 0)
- break;
- return i;
-}
-
-/*
- * Fake voltage switching for platforms with missing support
- */
-
-static void g5_dummy_switch_volt(int speed_mode)
-{
-}
-
-#endif /* CONFIG_PMAC_SMU */
-
-/*
- * Platform function based voltage switching for PowerMac7,2 & 7,3
- */
-
-static struct pmf_function *pfunc_cpu0_volt_high;
-static struct pmf_function *pfunc_cpu0_volt_low;
-static struct pmf_function *pfunc_cpu1_volt_high;
-static struct pmf_function *pfunc_cpu1_volt_low;
-
-static void g5_pfunc_switch_volt(int speed_mode)
-{
- if (speed_mode == CPUFREQ_HIGH) {
- if (pfunc_cpu0_volt_high)
- pmf_call_one(pfunc_cpu0_volt_high, NULL);
- if (pfunc_cpu1_volt_high)
- pmf_call_one(pfunc_cpu1_volt_high, NULL);
- } else {
- if (pfunc_cpu0_volt_low)
- pmf_call_one(pfunc_cpu0_volt_low, NULL);
- if (pfunc_cpu1_volt_low)
- pmf_call_one(pfunc_cpu1_volt_low, NULL);
- }
- msleep(10); /* should be faster , to fix */
-}
-
-/*
- * Platform function based frequency switching for PowerMac7,2 & 7,3
- */
-
-static struct pmf_function *pfunc_cpu_setfreq_high;
-static struct pmf_function *pfunc_cpu_setfreq_low;
-static struct pmf_function *pfunc_cpu_getfreq;
-static struct pmf_function *pfunc_slewing_done;
-
-static int g5_pfunc_switch_freq(int speed_mode)
-{
- struct pmf_args args;
- u32 done = 0;
- unsigned long timeout;
- int rc;
-
- DBG("g5_pfunc_switch_freq(%d)\n", speed_mode);
-
- /* If frequency is going up, first ramp up the voltage */
- if (speed_mode < g5_pmode_cur)
- g5_switch_volt(speed_mode);
-
- /* Do it */
- if (speed_mode == CPUFREQ_HIGH)
- rc = pmf_call_one(pfunc_cpu_setfreq_high, NULL);
- else
- rc = pmf_call_one(pfunc_cpu_setfreq_low, NULL);
-
- if (rc)
- printk(KERN_WARNING "cpufreq: pfunc switch error %d\n", rc);
-
- /* It's an irq GPIO so we should be able to just block here,
- * I'll do that later after I've properly tested the IRQ code for
- * platform functions
- */
- timeout = jiffies + HZ/10;
- while(!time_after(jiffies, timeout)) {
- args.count = 1;
- args.u[0].p = &done;
- pmf_call_one(pfunc_slewing_done, &args);
- if (done)
- break;
- msleep(1);
- }
- if (done == 0)
- printk(KERN_WARNING "cpufreq: Timeout in clock slewing !\n");
-
- /* If frequency is going down, last ramp the voltage */
- if (speed_mode > g5_pmode_cur)
- g5_switch_volt(speed_mode);
-
- g5_pmode_cur = speed_mode;
- ppc_proc_freq = g5_cpu_freqs[speed_mode].frequency * 1000ul;
-
- return 0;
-}
-
-static int g5_pfunc_query_freq(void)
-{
- struct pmf_args args;
- u32 val = 0;
-
- args.count = 1;
- args.u[0].p = &val;
- pmf_call_one(pfunc_cpu_getfreq, &args);
- return val ? CPUFREQ_HIGH : CPUFREQ_LOW;
-}
-
-
-/*
- * Common interface to the cpufreq core
- */
-
-static int g5_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, g5_cpu_freqs);
-}
-
-static int g5_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq, unsigned int relation)
-{
- unsigned int newstate = 0;
- struct cpufreq_freqs freqs;
- int rc;
-
- if (cpufreq_frequency_table_target(policy, g5_cpu_freqs,
- target_freq, relation, &newstate))
- return -EINVAL;
-
- if (g5_pmode_cur == newstate)
- return 0;
-
- mutex_lock(&g5_switch_mutex);
-
- freqs.old = g5_cpu_freqs[g5_pmode_cur].frequency;
- freqs.new = g5_cpu_freqs[newstate].frequency;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- rc = g5_switch_freq(newstate);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- mutex_unlock(&g5_switch_mutex);
-
- return rc;
-}
-
-static unsigned int g5_cpufreq_get_speed(unsigned int cpu)
-{
- return g5_cpu_freqs[g5_pmode_cur].frequency;
-}
-
-static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- policy->cpuinfo.transition_latency = transition_latency;
- policy->cur = g5_cpu_freqs[g5_query_freq()].frequency;
- /* secondary CPUs are tied to the primary one by the
- * cpufreq core if in the secondary policy we tell it that
- * it actually must be one policy together with all others. */
- cpumask_copy(policy->cpus, cpu_online_mask);
- cpufreq_frequency_table_get_attr(g5_cpu_freqs, policy->cpu);
-
- return cpufreq_frequency_table_cpuinfo(policy,
- g5_cpu_freqs);
-}
-
-
-static struct cpufreq_driver g5_cpufreq_driver = {
- .name = "powermac",
- .owner = THIS_MODULE,
- .flags = CPUFREQ_CONST_LOOPS,
- .init = g5_cpufreq_cpu_init,
- .verify = g5_cpufreq_verify,
- .target = g5_cpufreq_target,
- .get = g5_cpufreq_get_speed,
- .attr = g5_cpu_freqs_attr,
-};
-
-
-#ifdef CONFIG_PMAC_SMU
-
-static int __init g5_neo2_cpufreq_init(struct device_node *cpus)
-{
- struct device_node *cpunode;
- unsigned int psize, ssize;
- unsigned long max_freq;
- char *freq_method, *volt_method;
- const u32 *valp;
- u32 pvr_hi;
- int use_volts_vdnap = 0;
- int use_volts_smu = 0;
- int rc = -ENODEV;
-
- /* Check supported platforms */
- if (of_machine_is_compatible("PowerMac8,1") ||
- of_machine_is_compatible("PowerMac8,2") ||
- of_machine_is_compatible("PowerMac9,1"))
- use_volts_smu = 1;
- else if (of_machine_is_compatible("PowerMac11,2"))
- use_volts_vdnap = 1;
- else
- return -ENODEV;
-
- /* Get first CPU node */
- for (cpunode = NULL;
- (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) {
- const u32 *reg = of_get_property(cpunode, "reg", NULL);
- if (reg == NULL || (*reg) != 0)
- continue;
- if (!strcmp(cpunode->type, "cpu"))
- break;
- }
- if (cpunode == NULL) {
- printk(KERN_ERR "cpufreq: Can't find any CPU 0 node\n");
- return -ENODEV;
- }
-
- /* Check 970FX for now */
- valp = of_get_property(cpunode, "cpu-version", NULL);
- if (!valp) {
- DBG("No cpu-version property !\n");
- goto bail_noprops;
- }
- pvr_hi = (*valp) >> 16;
- if (pvr_hi != 0x3c && pvr_hi != 0x44) {
- printk(KERN_ERR "cpufreq: Unsupported CPU version\n");
- goto bail_noprops;
- }
-
- /* Look for the powertune data in the device-tree */
- g5_pmode_data = of_get_property(cpunode, "power-mode-data",&psize);
- if (!g5_pmode_data) {
- DBG("No power-mode-data !\n");
- goto bail_noprops;
- }
- g5_pmode_max = psize / sizeof(u32) - 1;
-
- if (use_volts_smu) {
- const struct smu_sdbp_header *shdr;
-
- /* Look for the FVT table */
- shdr = smu_get_sdb_partition(SMU_SDB_FVT_ID, NULL);
- if (!shdr)
- goto bail_noprops;
- g5_fvt_table = (struct smu_sdbp_fvt *)&shdr[1];
- ssize = (shdr->len * sizeof(u32)) -
- sizeof(struct smu_sdbp_header);
- g5_fvt_count = ssize / sizeof(struct smu_sdbp_fvt);
- g5_fvt_cur = 0;
-
- /* Sanity checking */
- if (g5_fvt_count < 1 || g5_pmode_max < 1)
- goto bail_noprops;
-
- g5_switch_volt = g5_smu_switch_volt;
- volt_method = "SMU";
- } else if (use_volts_vdnap) {
- struct device_node *root;
-
- root = of_find_node_by_path("/");
- if (root == NULL) {
- printk(KERN_ERR "cpufreq: Can't find root of "
- "device tree\n");
- goto bail_noprops;
- }
- pfunc_set_vdnap0 = pmf_find_function(root, "set-vdnap0");
- pfunc_vdnap0_complete =
- pmf_find_function(root, "slewing-done");
- if (pfunc_set_vdnap0 == NULL ||
- pfunc_vdnap0_complete == NULL) {
- printk(KERN_ERR "cpufreq: Can't find required "
- "platform function\n");
- goto bail_noprops;
- }
-
- g5_switch_volt = g5_vdnap_switch_volt;
- volt_method = "GPIO";
- } else {
- g5_switch_volt = g5_dummy_switch_volt;
- volt_method = "none";
- }
-
- /*
- * From what I see, clock-frequency is always the maximal frequency.
- * The current driver can not slew sysclk yet, so we really only deal
- * with powertune steps for now. We also only implement full freq and
- * half freq in this version. So far, I haven't yet seen a machine
- * supporting anything else.
- */
- valp = of_get_property(cpunode, "clock-frequency", NULL);
- if (!valp)
- return -ENODEV;
- max_freq = (*valp)/1000;
- g5_cpu_freqs[0].frequency = max_freq;
- g5_cpu_freqs[1].frequency = max_freq/2;
-
- /* Set callbacks */
- transition_latency = 12000;
- g5_switch_freq = g5_scom_switch_freq;
- g5_query_freq = g5_scom_query_freq;
- freq_method = "SCOM";
-
- /* Force apply current frequency to make sure everything is in
- * sync (voltage is right for example). Firmware may leave us with
- * a strange setting ...
- */
- g5_switch_volt(CPUFREQ_HIGH);
- msleep(10);
- g5_pmode_cur = -1;
- g5_switch_freq(g5_query_freq());
-
- printk(KERN_INFO "Registering G5 CPU frequency driver\n");
- printk(KERN_INFO "Frequency method: %s, Voltage method: %s\n",
- freq_method, volt_method);
- printk(KERN_INFO "Low: %d Mhz, High: %d Mhz, Cur: %d MHz\n",
- g5_cpu_freqs[1].frequency/1000,
- g5_cpu_freqs[0].frequency/1000,
- g5_cpu_freqs[g5_pmode_cur].frequency/1000);
-
- rc = cpufreq_register_driver(&g5_cpufreq_driver);
-
- /* We keep the CPU node on hold... hopefully, Apple G5 don't have
- * hotplug CPU with a dynamic device-tree ...
- */
- return rc;
-
- bail_noprops:
- of_node_put(cpunode);
-
- return rc;
-}
-
-#endif /* CONFIG_PMAC_SMU */
-
-
-static int __init g5_pm72_cpufreq_init(struct device_node *cpus)
-{
- struct device_node *cpuid = NULL, *hwclock = NULL, *cpunode = NULL;
- const u8 *eeprom = NULL;
- const u32 *valp;
- u64 max_freq, min_freq, ih, il;
- int has_volt = 1, rc = 0;
-
- DBG("cpufreq: Initializing for PowerMac7,2, PowerMac7,3 and"
- " RackMac3,1...\n");
-
- /* Get first CPU node */
- for (cpunode = NULL;
- (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) {
- if (!strcmp(cpunode->type, "cpu"))
- break;
- }
- if (cpunode == NULL) {
- printk(KERN_ERR "cpufreq: Can't find any CPU node\n");
- return -ENODEV;
- }
-
- /* Lookup the cpuid eeprom node */
- cpuid = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/cpuid@a0");
- if (cpuid != NULL)
- eeprom = of_get_property(cpuid, "cpuid", NULL);
- if (eeprom == NULL) {
- printk(KERN_ERR "cpufreq: Can't find cpuid EEPROM !\n");
- rc = -ENODEV;
- goto bail;
- }
-
- /* Lookup the i2c hwclock */
- for (hwclock = NULL;
- (hwclock = of_find_node_by_name(hwclock, "i2c-hwclock")) != NULL;){
- const char *loc = of_get_property(hwclock,
- "hwctrl-location", NULL);
- if (loc == NULL)
- continue;
- if (strcmp(loc, "CPU CLOCK"))
- continue;
- if (!of_get_property(hwclock, "platform-get-frequency", NULL))
- continue;
- break;
- }
- if (hwclock == NULL) {
- printk(KERN_ERR "cpufreq: Can't find i2c clock chip !\n");
- rc = -ENODEV;
- goto bail;
- }
-
- DBG("cpufreq: i2c clock chip found: %s\n", hwclock->full_name);
-
- /* Now get all the platform functions */
- pfunc_cpu_getfreq =
- pmf_find_function(hwclock, "get-frequency");
- pfunc_cpu_setfreq_high =
- pmf_find_function(hwclock, "set-frequency-high");
- pfunc_cpu_setfreq_low =
- pmf_find_function(hwclock, "set-frequency-low");
- pfunc_slewing_done =
- pmf_find_function(hwclock, "slewing-done");
- pfunc_cpu0_volt_high =
- pmf_find_function(hwclock, "set-voltage-high-0");
- pfunc_cpu0_volt_low =
- pmf_find_function(hwclock, "set-voltage-low-0");
- pfunc_cpu1_volt_high =
- pmf_find_function(hwclock, "set-voltage-high-1");
- pfunc_cpu1_volt_low =
- pmf_find_function(hwclock, "set-voltage-low-1");
-
- /* Check we have minimum requirements */
- if (pfunc_cpu_getfreq == NULL || pfunc_cpu_setfreq_high == NULL ||
- pfunc_cpu_setfreq_low == NULL || pfunc_slewing_done == NULL) {
- printk(KERN_ERR "cpufreq: Can't find platform functions !\n");
- rc = -ENODEV;
- goto bail;
- }
-
- /* Check that we have complete sets */
- if (pfunc_cpu0_volt_high == NULL || pfunc_cpu0_volt_low == NULL) {
- pmf_put_function(pfunc_cpu0_volt_high);
- pmf_put_function(pfunc_cpu0_volt_low);
- pfunc_cpu0_volt_high = pfunc_cpu0_volt_low = NULL;
- has_volt = 0;
- }
- if (!has_volt ||
- pfunc_cpu1_volt_high == NULL || pfunc_cpu1_volt_low == NULL) {
- pmf_put_function(pfunc_cpu1_volt_high);
- pmf_put_function(pfunc_cpu1_volt_low);
- pfunc_cpu1_volt_high = pfunc_cpu1_volt_low = NULL;
- }
-
- /* Note: The device tree also contains a "platform-set-values"
- * function for which I haven't quite figured out the usage. It
- * might have to be called on init and/or wakeup, I'm not too sure
- * but things seem to work fine without it so far ...
- */
-
- /* Get max frequency from device-tree */
- valp = of_get_property(cpunode, "clock-frequency", NULL);
- if (!valp) {
- printk(KERN_ERR "cpufreq: Can't find CPU frequency !\n");
- rc = -ENODEV;
- goto bail;
- }
-
- max_freq = (*valp)/1000;
-
- /* Now calculate reduced frequency by using the cpuid input freq
- * ratio. This requires 64 bits math unless we are willing to lose
- * some precision
- */
- ih = *((u32 *)(eeprom + 0x10));
- il = *((u32 *)(eeprom + 0x20));
-
- /* Check for machines with no useful settings */
- if (il == ih) {
- printk(KERN_WARNING "cpufreq: No low frequency mode available"
- " on this model !\n");
- rc = -ENODEV;
- goto bail;
- }
-
- min_freq = 0;
- if (ih != 0 && il != 0)
- min_freq = (max_freq * il) / ih;
-
- /* Sanity check */
- if (min_freq >= max_freq || min_freq < 1000) {
- printk(KERN_ERR "cpufreq: Can't calculate low frequency !\n");
- rc = -ENXIO;
- goto bail;
- }
- g5_cpu_freqs[0].frequency = max_freq;
- g5_cpu_freqs[1].frequency = min_freq;
-
- /* Set callbacks */
- transition_latency = CPUFREQ_ETERNAL;
- g5_switch_volt = g5_pfunc_switch_volt;
- g5_switch_freq = g5_pfunc_switch_freq;
- g5_query_freq = g5_pfunc_query_freq;
-
- /* Force apply current frequency to make sure everything is in
- * sync (voltage is right for example). Firmware may leave us with
- * a strange setting ...
- */
- g5_switch_volt(CPUFREQ_HIGH);
- msleep(10);
- g5_pmode_cur = -1;
- g5_switch_freq(g5_query_freq());
-
- printk(KERN_INFO "Registering G5 CPU frequency driver\n");
- printk(KERN_INFO "Frequency method: i2c/pfunc, "
- "Voltage method: %s\n", has_volt ? "i2c/pfunc" : "none");
- printk(KERN_INFO "Low: %d Mhz, High: %d Mhz, Cur: %d MHz\n",
- g5_cpu_freqs[1].frequency/1000,
- g5_cpu_freqs[0].frequency/1000,
- g5_cpu_freqs[g5_pmode_cur].frequency/1000);
-
- rc = cpufreq_register_driver(&g5_cpufreq_driver);
- bail:
- if (rc != 0) {
- pmf_put_function(pfunc_cpu_getfreq);
- pmf_put_function(pfunc_cpu_setfreq_high);
- pmf_put_function(pfunc_cpu_setfreq_low);
- pmf_put_function(pfunc_slewing_done);
- pmf_put_function(pfunc_cpu0_volt_high);
- pmf_put_function(pfunc_cpu0_volt_low);
- pmf_put_function(pfunc_cpu1_volt_high);
- pmf_put_function(pfunc_cpu1_volt_low);
- }
- of_node_put(hwclock);
- of_node_put(cpuid);
- of_node_put(cpunode);
-
- return rc;
-}
-
-static int __init g5_cpufreq_init(void)
-{
- struct device_node *cpus;
- int rc = 0;
-
- cpus = of_find_node_by_path("/cpus");
- if (cpus == NULL) {
- DBG("No /cpus node !\n");
- return -ENODEV;
- }
-
- if (of_machine_is_compatible("PowerMac7,2") ||
- of_machine_is_compatible("PowerMac7,3") ||
- of_machine_is_compatible("RackMac3,1"))
- rc = g5_pm72_cpufreq_init(cpus);
-#ifdef CONFIG_PMAC_SMU
- else
- rc = g5_neo2_cpufreq_init(cpus);
-#endif /* CONFIG_PMAC_SMU */
-
- of_node_put(cpus);
- return rc;
-}
-
-module_init(g5_cpufreq_init);
-
-
-MODULE_LICENSE("GPL");