This patch moves cpufreq driver of powerpc platforms/cell to drivers/cpufreq.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
default m
depends on CBE_RAS && SPU_BASE
-config CBE_CPUFREQ
- tristate "CBE frequency scaling"
- depends on CBE_RAS && CPU_FREQ
- default m
- help
- This adds the cpufreq driver for Cell BE processors.
- For details, take a look at <file:Documentation/cpu-freq/>.
- If you don't have such processor, say N
-
-config CBE_CPUFREQ_PMI_ENABLE
- bool "CBE frequency scaling using PMI interface"
- depends on CBE_CPUFREQ
- default n
- help
- Select this, if you want to use the PMI interface
- to switch frequencies. Using PMI, the
- processor will not only be able to run at lower speed,
- but also at lower core voltage.
-
-config CBE_CPUFREQ_PMI
- tristate
- depends on CBE_CPUFREQ_PMI_ENABLE
- default CBE_CPUFREQ
-
config PPC_PMI
tristate
default y
- depends on CBE_CPUFREQ_PMI || PPC_IBM_CELL_POWERBUTTON
+ depends on CPU_FREQ_CBE_PMI || PPC_IBM_CELL_POWERBUTTON
help
PMI (Platform Management Interrupt) is a way to
communicate with the BMC (Baseboard Management Controller).
obj-$(CONFIG_CBE_RAS) += ras.o
obj-$(CONFIG_CBE_THERM) += cbe_thermal.o
-obj-$(CONFIG_CBE_CPUFREQ_PMI) += cbe_cpufreq_pmi.o
-obj-$(CONFIG_CBE_CPUFREQ) += cbe-cpufreq.o
-cbe-cpufreq-y += cbe_cpufreq_pervasive.o cbe_cpufreq.o
obj-$(CONFIG_CBE_CPUFREQ_SPU_GOVERNOR) += cpufreq_spudemand.o
obj-$(CONFIG_PPC_IBM_CELL_POWERBUTTON) += cbe_powerbutton.o
+++ /dev/null
-/*
- * cpufreq driver for the cell processor
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
- *
- * Author: Christian Krafft <krafft@de.ibm.com>
- *
- * 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/module.h>
-#include <linux/of_platform.h>
-
-#include <asm/machdep.h>
-#include <asm/prom.h>
-#include <asm/cell-regs.h>
-#include "cbe_cpufreq.h"
-
-static DEFINE_MUTEX(cbe_switch_mutex);
-
-
-/* the CBE supports an 8 step frequency scaling */
-static struct cpufreq_frequency_table cbe_freqs[] = {
- {1, 0},
- {2, 0},
- {3, 0},
- {4, 0},
- {5, 0},
- {6, 0},
- {8, 0},
- {10, 0},
- {0, CPUFREQ_TABLE_END},
-};
-
-/*
- * hardware specific functions
- */
-
-static int set_pmode(unsigned int cpu, unsigned int slow_mode)
-{
- int rc;
-
- if (cbe_cpufreq_has_pmi)
- rc = cbe_cpufreq_set_pmode_pmi(cpu, slow_mode);
- else
- rc = cbe_cpufreq_set_pmode(cpu, slow_mode);
-
- pr_debug("register contains slow mode %d\n", cbe_cpufreq_get_pmode(cpu));
-
- return rc;
-}
-
-/*
- * cpufreq functions
- */
-
-static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- const u32 *max_freqp;
- u32 max_freq;
- int i, cur_pmode;
- struct device_node *cpu;
-
- cpu = of_get_cpu_node(policy->cpu, NULL);
-
- if (!cpu)
- return -ENODEV;
-
- pr_debug("init cpufreq on CPU %d\n", policy->cpu);
-
- /*
- * Let's check we can actually get to the CELL regs
- */
- if (!cbe_get_cpu_pmd_regs(policy->cpu) ||
- !cbe_get_cpu_mic_tm_regs(policy->cpu)) {
- pr_info("invalid CBE regs pointers for cpufreq\n");
- return -EINVAL;
- }
-
- max_freqp = of_get_property(cpu, "clock-frequency", NULL);
-
- of_node_put(cpu);
-
- if (!max_freqp)
- return -EINVAL;
-
- /* 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; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
- cbe_freqs[i].frequency = max_freq / cbe_freqs[i].index;
- pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
- }
-
- /* if DEBUG is enabled set_pmode() measures the latency
- * of a transition */
- policy->cpuinfo.transition_latency = 25000;
-
- cur_pmode = cbe_cpufreq_get_pmode(policy->cpu);
- pr_debug("current pmode is at %d\n",cur_pmode);
-
- policy->cur = cbe_freqs[cur_pmode].frequency;
-
-#ifdef CONFIG_SMP
- cpumask_copy(policy->cpus, cpu_sibling_mask(policy->cpu));
-#endif
-
- cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu);
-
- /* this ensures that policy->cpuinfo_min
- * and policy->cpuinfo_max are set correctly */
- return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs);
-}
-
-static int cbe_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-static int cbe_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, cbe_freqs);
-}
-
-static int cbe_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- int rc;
- struct cpufreq_freqs freqs;
- unsigned int cbe_pmode_new;
-
- cpufreq_frequency_table_target(policy,
- cbe_freqs,
- target_freq,
- relation,
- &cbe_pmode_new);
-
- freqs.old = policy->cur;
- freqs.new = cbe_freqs[cbe_pmode_new].frequency;
-
- mutex_lock(&cbe_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,
- cbe_freqs[cbe_pmode_new].frequency,
- cbe_freqs[cbe_pmode_new].index);
-
- rc = set_pmode(policy->cpu, cbe_pmode_new);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- mutex_unlock(&cbe_switch_mutex);
-
- return rc;
-}
-
-static struct cpufreq_driver cbe_cpufreq_driver = {
- .verify = cbe_cpufreq_verify,
- .target = cbe_cpufreq_target,
- .init = cbe_cpufreq_cpu_init,
- .exit = cbe_cpufreq_cpu_exit,
- .name = "cbe-cpufreq",
- .owner = THIS_MODULE,
- .flags = CPUFREQ_CONST_LOOPS,
-};
-
-/*
- * module init and destoy
- */
-
-static int __init cbe_cpufreq_init(void)
-{
- if (!machine_is(cell))
- return -ENODEV;
-
- return cpufreq_register_driver(&cbe_cpufreq_driver);
-}
-
-static void __exit cbe_cpufreq_exit(void)
-{
- cpufreq_unregister_driver(&cbe_cpufreq_driver);
-}
-
-module_init(cbe_cpufreq_init);
-module_exit(cbe_cpufreq_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
+++ /dev/null
-/*
- * cbe_cpufreq.h
- *
- * This file contains the definitions used by the cbe_cpufreq driver.
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
- *
- * Author: Christian Krafft <krafft@de.ibm.com>
- *
- */
-
-#include <linux/cpufreq.h>
-#include <linux/types.h>
-
-int cbe_cpufreq_set_pmode(int cpu, unsigned int pmode);
-int cbe_cpufreq_get_pmode(int cpu);
-
-int cbe_cpufreq_set_pmode_pmi(int cpu, unsigned int pmode);
-
-#if defined(CONFIG_CBE_CPUFREQ_PMI) || defined(CONFIG_CBE_CPUFREQ_PMI_MODULE)
-extern bool cbe_cpufreq_has_pmi;
-#else
-#define cbe_cpufreq_has_pmi (0)
-#endif
+++ /dev/null
-/*
- * pervasive backend for the cbe_cpufreq driver
- *
- * This driver makes use of the pervasive unit to
- * engage the desired frequency.
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
- *
- * Author: Christian Krafft <krafft@de.ibm.com>
- *
- * 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/io.h>
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <asm/machdep.h>
-#include <asm/hw_irq.h>
-#include <asm/cell-regs.h>
-
-#include "cbe_cpufreq.h"
-
-/* to write to MIC register */
-static u64 MIC_Slow_Fast_Timer_table[] = {
- [0 ... 7] = 0x007fc00000000000ull,
-};
-
-/* more values for the MIC */
-static u64 MIC_Slow_Next_Timer_table[] = {
- 0x0000240000000000ull,
- 0x0000268000000000ull,
- 0x000029C000000000ull,
- 0x00002D0000000000ull,
- 0x0000300000000000ull,
- 0x0000334000000000ull,
- 0x000039C000000000ull,
- 0x00003FC000000000ull,
-};
-
-
-int cbe_cpufreq_set_pmode(int cpu, unsigned int pmode)
-{
- struct cbe_pmd_regs __iomem *pmd_regs;
- struct cbe_mic_tm_regs __iomem *mic_tm_regs;
- unsigned long flags;
- u64 value;
-#ifdef DEBUG
- long time;
-#endif
-
- local_irq_save(flags);
-
- mic_tm_regs = cbe_get_cpu_mic_tm_regs(cpu);
- pmd_regs = cbe_get_cpu_pmd_regs(cpu);
-
-#ifdef DEBUG
- time = jiffies;
-#endif
-
- out_be64(&mic_tm_regs->slow_fast_timer_0, MIC_Slow_Fast_Timer_table[pmode]);
- out_be64(&mic_tm_regs->slow_fast_timer_1, MIC_Slow_Fast_Timer_table[pmode]);
-
- out_be64(&mic_tm_regs->slow_next_timer_0, MIC_Slow_Next_Timer_table[pmode]);
- out_be64(&mic_tm_regs->slow_next_timer_1, MIC_Slow_Next_Timer_table[pmode]);
-
- value = in_be64(&pmd_regs->pmcr);
- /* set bits to zero */
- value &= 0xFFFFFFFFFFFFFFF8ull;
- /* set bits to next pmode */
- value |= pmode;
-
- out_be64(&pmd_regs->pmcr, value);
-
-#ifdef DEBUG
- /* wait until new pmode appears in status register */
- value = in_be64(&pmd_regs->pmsr) & 0x07;
- while (value != pmode) {
- cpu_relax();
- value = in_be64(&pmd_regs->pmsr) & 0x07;
- }
-
- time = jiffies - time;
- time = jiffies_to_msecs(time);
- pr_debug("had to wait %lu ms for a transition using " \
- "pervasive unit\n", time);
-#endif
- local_irq_restore(flags);
-
- return 0;
-}
-
-
-int cbe_cpufreq_get_pmode(int cpu)
-{
- int ret;
- struct cbe_pmd_regs __iomem *pmd_regs;
-
- pmd_regs = cbe_get_cpu_pmd_regs(cpu);
- ret = in_be64(&pmd_regs->pmsr) & 0x07;
-
- return ret;
-}
-
+++ /dev/null
-/*
- * pmi backend for the cbe_cpufreq driver
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
- *
- * Author: Christian Krafft <krafft@de.ibm.com>
- *
- * 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/kernel.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/module.h>
-#include <linux/of_platform.h>
-
-#include <asm/processor.h>
-#include <asm/prom.h>
-#include <asm/pmi.h>
-#include <asm/cell-regs.h>
-
-#ifdef DEBUG
-#include <asm/time.h>
-#endif
-
-#include "cbe_cpufreq.h"
-
-static u8 pmi_slow_mode_limit[MAX_CBE];
-
-bool cbe_cpufreq_has_pmi = false;
-EXPORT_SYMBOL_GPL(cbe_cpufreq_has_pmi);
-
-/*
- * hardware specific functions
- */
-
-int cbe_cpufreq_set_pmode_pmi(int cpu, unsigned int pmode)
-{
- int ret;
- pmi_message_t pmi_msg;
-#ifdef DEBUG
- long time;
-#endif
- pmi_msg.type = PMI_TYPE_FREQ_CHANGE;
- pmi_msg.data1 = cbe_cpu_to_node(cpu);
- pmi_msg.data2 = pmode;
-
-#ifdef DEBUG
- time = jiffies;
-#endif
- pmi_send_message(pmi_msg);
-
-#ifdef DEBUG
- time = jiffies - time;
- time = jiffies_to_msecs(time);
- pr_debug("had to wait %lu ms for a transition using " \
- "PMI\n", time);
-#endif
- ret = pmi_msg.data2;
- pr_debug("PMI returned slow mode %d\n", ret);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(cbe_cpufreq_set_pmode_pmi);
-
-
-static void cbe_cpufreq_handle_pmi(pmi_message_t pmi_msg)
-{
- u8 node, slow_mode;
-
- BUG_ON(pmi_msg.type != PMI_TYPE_FREQ_CHANGE);
-
- node = pmi_msg.data1;
- slow_mode = pmi_msg.data2;
-
- pmi_slow_mode_limit[node] = slow_mode;
-
- pr_debug("cbe_handle_pmi: node: %d max_freq: %d\n", node, slow_mode);
-}
-
-static int pmi_notifier(struct notifier_block *nb,
- unsigned long event, void *data)
-{
- struct cpufreq_policy *policy = data;
- struct cpufreq_frequency_table *cbe_freqs;
- u8 node;
-
- /* Should this really be called for CPUFREQ_ADJUST, CPUFREQ_INCOMPATIBLE
- * and CPUFREQ_NOTIFY policy events?)
- */
- if (event == CPUFREQ_START)
- return 0;
-
- cbe_freqs = cpufreq_frequency_get_table(policy->cpu);
- node = cbe_cpu_to_node(policy->cpu);
-
- pr_debug("got notified, event=%lu, node=%u\n", event, node);
-
- if (pmi_slow_mode_limit[node] != 0) {
- pr_debug("limiting node %d to slow mode %d\n",
- node, pmi_slow_mode_limit[node]);
-
- cpufreq_verify_within_limits(policy, 0,
-
- cbe_freqs[pmi_slow_mode_limit[node]].frequency);
- }
-
- return 0;
-}
-
-static struct notifier_block pmi_notifier_block = {
- .notifier_call = pmi_notifier,
-};
-
-static struct pmi_handler cbe_pmi_handler = {
- .type = PMI_TYPE_FREQ_CHANGE,
- .handle_pmi_message = cbe_cpufreq_handle_pmi,
-};
-
-
-
-static int __init cbe_cpufreq_pmi_init(void)
-{
- cbe_cpufreq_has_pmi = pmi_register_handler(&cbe_pmi_handler) == 0;
-
- if (!cbe_cpufreq_has_pmi)
- return -ENODEV;
-
- cpufreq_register_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER);
-
- return 0;
-}
-
-static void __exit cbe_cpufreq_pmi_exit(void)
-{
- cpufreq_unregister_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER);
- pmi_unregister_handler(&cbe_pmi_handler);
-}
-
-module_init(cbe_cpufreq_pmi_init);
-module_exit(cbe_cpufreq_pmi_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
+config CPU_FREQ_CBE
+ tristate "CBE frequency scaling"
+ depends on CBE_RAS && PPC_CELL
+ default m
+ help
+ This adds the cpufreq driver for Cell BE processors.
+ For details, take a look at <file:Documentation/cpu-freq/>.
+ If you don't have such processor, say N
+
+config CPU_FREQ_CBE_PMI
+ bool "CBE frequency scaling using PMI interface"
+ depends on CPU_FREQ_CBE
+ default n
+ help
+ Select this, if you want to use the PMI interface to switch
+ frequencies. Using PMI, the processor will not only be able to run at
+ lower speed, but also at lower core voltage.
+
config CPU_FREQ_MAPLE
bool "Support for Maple 970FX Evaluation Board"
depends on PPC_MAPLE
##################################################################################
# PowerPC platform drivers
+obj-$(CONFIG_CPU_FREQ_CBE) += ppc-cbe-cpufreq.o
+ppc-cbe-cpufreq-y += ppc_cbe_cpufreq_pervasive.o ppc_cbe_cpufreq.o
+obj-$(CONFIG_CPU_FREQ_CBE_PMI) += ppc_cbe_cpufreq_pmi.o
obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o
##################################################################################
--- /dev/null
+/*
+ * cpufreq driver for the cell processor
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
+ *
+ * Author: Christian Krafft <krafft@de.ibm.com>
+ *
+ * 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/module.h>
+#include <linux/of_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/cell-regs.h>
+
+#include "ppc_cbe_cpufreq.h"
+
+static DEFINE_MUTEX(cbe_switch_mutex);
+
+
+/* the CBE supports an 8 step frequency scaling */
+static struct cpufreq_frequency_table cbe_freqs[] = {
+ {1, 0},
+ {2, 0},
+ {3, 0},
+ {4, 0},
+ {5, 0},
+ {6, 0},
+ {8, 0},
+ {10, 0},
+ {0, CPUFREQ_TABLE_END},
+};
+
+/*
+ * hardware specific functions
+ */
+
+static int set_pmode(unsigned int cpu, unsigned int slow_mode)
+{
+ int rc;
+
+ if (cbe_cpufreq_has_pmi)
+ rc = cbe_cpufreq_set_pmode_pmi(cpu, slow_mode);
+ else
+ rc = cbe_cpufreq_set_pmode(cpu, slow_mode);
+
+ pr_debug("register contains slow mode %d\n", cbe_cpufreq_get_pmode(cpu));
+
+ return rc;
+}
+
+/*
+ * cpufreq functions
+ */
+
+static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+ const u32 *max_freqp;
+ u32 max_freq;
+ int i, cur_pmode;
+ struct device_node *cpu;
+
+ cpu = of_get_cpu_node(policy->cpu, NULL);
+
+ if (!cpu)
+ return -ENODEV;
+
+ pr_debug("init cpufreq on CPU %d\n", policy->cpu);
+
+ /*
+ * Let's check we can actually get to the CELL regs
+ */
+ if (!cbe_get_cpu_pmd_regs(policy->cpu) ||
+ !cbe_get_cpu_mic_tm_regs(policy->cpu)) {
+ pr_info("invalid CBE regs pointers for cpufreq\n");
+ return -EINVAL;
+ }
+
+ max_freqp = of_get_property(cpu, "clock-frequency", NULL);
+
+ of_node_put(cpu);
+
+ if (!max_freqp)
+ return -EINVAL;
+
+ /* 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; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
+ cbe_freqs[i].frequency = max_freq / cbe_freqs[i].index;
+ pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
+ }
+
+ /* if DEBUG is enabled set_pmode() measures the latency
+ * of a transition */
+ policy->cpuinfo.transition_latency = 25000;
+
+ cur_pmode = cbe_cpufreq_get_pmode(policy->cpu);
+ pr_debug("current pmode is at %d\n",cur_pmode);
+
+ policy->cur = cbe_freqs[cur_pmode].frequency;
+
+#ifdef CONFIG_SMP
+ cpumask_copy(policy->cpus, cpu_sibling_mask(policy->cpu));
+#endif
+
+ cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu);
+
+ /* this ensures that policy->cpuinfo_min
+ * and policy->cpuinfo_max are set correctly */
+ return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs);
+}
+
+static int cbe_cpufreq_cpu_exit(struct cpufreq_policy *policy)
+{
+ cpufreq_frequency_table_put_attr(policy->cpu);
+ return 0;
+}
+
+static int cbe_cpufreq_verify(struct cpufreq_policy *policy)
+{
+ return cpufreq_frequency_table_verify(policy, cbe_freqs);
+}
+
+static int cbe_cpufreq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ int rc;
+ struct cpufreq_freqs freqs;
+ unsigned int cbe_pmode_new;
+
+ cpufreq_frequency_table_target(policy,
+ cbe_freqs,
+ target_freq,
+ relation,
+ &cbe_pmode_new);
+
+ freqs.old = policy->cur;
+ freqs.new = cbe_freqs[cbe_pmode_new].frequency;
+
+ mutex_lock(&cbe_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,
+ cbe_freqs[cbe_pmode_new].frequency,
+ cbe_freqs[cbe_pmode_new].index);
+
+ rc = set_pmode(policy->cpu, cbe_pmode_new);
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ mutex_unlock(&cbe_switch_mutex);
+
+ return rc;
+}
+
+static struct cpufreq_driver cbe_cpufreq_driver = {
+ .verify = cbe_cpufreq_verify,
+ .target = cbe_cpufreq_target,
+ .init = cbe_cpufreq_cpu_init,
+ .exit = cbe_cpufreq_cpu_exit,
+ .name = "cbe-cpufreq",
+ .owner = THIS_MODULE,
+ .flags = CPUFREQ_CONST_LOOPS,
+};
+
+/*
+ * module init and destoy
+ */
+
+static int __init cbe_cpufreq_init(void)
+{
+ if (!machine_is(cell))
+ return -ENODEV;
+
+ return cpufreq_register_driver(&cbe_cpufreq_driver);
+}
+
+static void __exit cbe_cpufreq_exit(void)
+{
+ cpufreq_unregister_driver(&cbe_cpufreq_driver);
+}
+
+module_init(cbe_cpufreq_init);
+module_exit(cbe_cpufreq_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
--- /dev/null
+/*
+ * ppc_cbe_cpufreq.h
+ *
+ * This file contains the definitions used by the cbe_cpufreq driver.
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
+ *
+ * Author: Christian Krafft <krafft@de.ibm.com>
+ *
+ */
+
+#include <linux/cpufreq.h>
+#include <linux/types.h>
+
+int cbe_cpufreq_set_pmode(int cpu, unsigned int pmode);
+int cbe_cpufreq_get_pmode(int cpu);
+
+int cbe_cpufreq_set_pmode_pmi(int cpu, unsigned int pmode);
+
+#if defined(CONFIG_CPU_FREQ_CBE_PMI) || defined(CONFIG_CPU_FREQ_CBE_PMI_MODULE)
+extern bool cbe_cpufreq_has_pmi;
+#else
+#define cbe_cpufreq_has_pmi (0)
+#endif
--- /dev/null
+/*
+ * pervasive backend for the cbe_cpufreq driver
+ *
+ * This driver makes use of the pervasive unit to
+ * engage the desired frequency.
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
+ *
+ * Author: Christian Krafft <krafft@de.ibm.com>
+ *
+ * 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/io.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <asm/machdep.h>
+#include <asm/hw_irq.h>
+#include <asm/cell-regs.h>
+
+#include "ppc_cbe_cpufreq.h"
+
+/* to write to MIC register */
+static u64 MIC_Slow_Fast_Timer_table[] = {
+ [0 ... 7] = 0x007fc00000000000ull,
+};
+
+/* more values for the MIC */
+static u64 MIC_Slow_Next_Timer_table[] = {
+ 0x0000240000000000ull,
+ 0x0000268000000000ull,
+ 0x000029C000000000ull,
+ 0x00002D0000000000ull,
+ 0x0000300000000000ull,
+ 0x0000334000000000ull,
+ 0x000039C000000000ull,
+ 0x00003FC000000000ull,
+};
+
+
+int cbe_cpufreq_set_pmode(int cpu, unsigned int pmode)
+{
+ struct cbe_pmd_regs __iomem *pmd_regs;
+ struct cbe_mic_tm_regs __iomem *mic_tm_regs;
+ unsigned long flags;
+ u64 value;
+#ifdef DEBUG
+ long time;
+#endif
+
+ local_irq_save(flags);
+
+ mic_tm_regs = cbe_get_cpu_mic_tm_regs(cpu);
+ pmd_regs = cbe_get_cpu_pmd_regs(cpu);
+
+#ifdef DEBUG
+ time = jiffies;
+#endif
+
+ out_be64(&mic_tm_regs->slow_fast_timer_0, MIC_Slow_Fast_Timer_table[pmode]);
+ out_be64(&mic_tm_regs->slow_fast_timer_1, MIC_Slow_Fast_Timer_table[pmode]);
+
+ out_be64(&mic_tm_regs->slow_next_timer_0, MIC_Slow_Next_Timer_table[pmode]);
+ out_be64(&mic_tm_regs->slow_next_timer_1, MIC_Slow_Next_Timer_table[pmode]);
+
+ value = in_be64(&pmd_regs->pmcr);
+ /* set bits to zero */
+ value &= 0xFFFFFFFFFFFFFFF8ull;
+ /* set bits to next pmode */
+ value |= pmode;
+
+ out_be64(&pmd_regs->pmcr, value);
+
+#ifdef DEBUG
+ /* wait until new pmode appears in status register */
+ value = in_be64(&pmd_regs->pmsr) & 0x07;
+ while (value != pmode) {
+ cpu_relax();
+ value = in_be64(&pmd_regs->pmsr) & 0x07;
+ }
+
+ time = jiffies - time;
+ time = jiffies_to_msecs(time);
+ pr_debug("had to wait %lu ms for a transition using " \
+ "pervasive unit\n", time);
+#endif
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+
+int cbe_cpufreq_get_pmode(int cpu)
+{
+ int ret;
+ struct cbe_pmd_regs __iomem *pmd_regs;
+
+ pmd_regs = cbe_get_cpu_pmd_regs(cpu);
+ ret = in_be64(&pmd_regs->pmsr) & 0x07;
+
+ return ret;
+}
+
--- /dev/null
+/*
+ * pmi backend for the cbe_cpufreq driver
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007
+ *
+ * Author: Christian Krafft <krafft@de.ibm.com>
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+
+#include <asm/processor.h>
+#include <asm/prom.h>
+#include <asm/pmi.h>
+#include <asm/cell-regs.h>
+
+#ifdef DEBUG
+#include <asm/time.h>
+#endif
+
+#include "ppc_cbe_cpufreq.h"
+
+static u8 pmi_slow_mode_limit[MAX_CBE];
+
+bool cbe_cpufreq_has_pmi = false;
+EXPORT_SYMBOL_GPL(cbe_cpufreq_has_pmi);
+
+/*
+ * hardware specific functions
+ */
+
+int cbe_cpufreq_set_pmode_pmi(int cpu, unsigned int pmode)
+{
+ int ret;
+ pmi_message_t pmi_msg;
+#ifdef DEBUG
+ long time;
+#endif
+ pmi_msg.type = PMI_TYPE_FREQ_CHANGE;
+ pmi_msg.data1 = cbe_cpu_to_node(cpu);
+ pmi_msg.data2 = pmode;
+
+#ifdef DEBUG
+ time = jiffies;
+#endif
+ pmi_send_message(pmi_msg);
+
+#ifdef DEBUG
+ time = jiffies - time;
+ time = jiffies_to_msecs(time);
+ pr_debug("had to wait %lu ms for a transition using " \
+ "PMI\n", time);
+#endif
+ ret = pmi_msg.data2;
+ pr_debug("PMI returned slow mode %d\n", ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cbe_cpufreq_set_pmode_pmi);
+
+
+static void cbe_cpufreq_handle_pmi(pmi_message_t pmi_msg)
+{
+ u8 node, slow_mode;
+
+ BUG_ON(pmi_msg.type != PMI_TYPE_FREQ_CHANGE);
+
+ node = pmi_msg.data1;
+ slow_mode = pmi_msg.data2;
+
+ pmi_slow_mode_limit[node] = slow_mode;
+
+ pr_debug("cbe_handle_pmi: node: %d max_freq: %d\n", node, slow_mode);
+}
+
+static int pmi_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct cpufreq_policy *policy = data;
+ struct cpufreq_frequency_table *cbe_freqs;
+ u8 node;
+
+ /* Should this really be called for CPUFREQ_ADJUST, CPUFREQ_INCOMPATIBLE
+ * and CPUFREQ_NOTIFY policy events?)
+ */
+ if (event == CPUFREQ_START)
+ return 0;
+
+ cbe_freqs = cpufreq_frequency_get_table(policy->cpu);
+ node = cbe_cpu_to_node(policy->cpu);
+
+ pr_debug("got notified, event=%lu, node=%u\n", event, node);
+
+ if (pmi_slow_mode_limit[node] != 0) {
+ pr_debug("limiting node %d to slow mode %d\n",
+ node, pmi_slow_mode_limit[node]);
+
+ cpufreq_verify_within_limits(policy, 0,
+
+ cbe_freqs[pmi_slow_mode_limit[node]].frequency);
+ }
+
+ return 0;
+}
+
+static struct notifier_block pmi_notifier_block = {
+ .notifier_call = pmi_notifier,
+};
+
+static struct pmi_handler cbe_pmi_handler = {
+ .type = PMI_TYPE_FREQ_CHANGE,
+ .handle_pmi_message = cbe_cpufreq_handle_pmi,
+};
+
+
+
+static int __init cbe_cpufreq_pmi_init(void)
+{
+ cbe_cpufreq_has_pmi = pmi_register_handler(&cbe_pmi_handler) == 0;
+
+ if (!cbe_cpufreq_has_pmi)
+ return -ENODEV;
+
+ cpufreq_register_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER);
+
+ return 0;
+}
+
+static void __exit cbe_cpufreq_pmi_exit(void)
+{
+ cpufreq_unregister_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER);
+ pmi_unregister_handler(&cbe_pmi_handler);
+}
+
+module_init(cbe_cpufreq_pmi_init);
+module_exit(cbe_cpufreq_pmi_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff