#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/cpumask.h>
+#include <linux/timex.h>
#include <asm/processor.h>
#include <asm/msr.h>
-#include <asm/timex.h>
#include "speedstep-lib.h"
#define PFX "p4-clockmod: "
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "p4-clockmod", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
+ "p4-clockmod", msg)
/*
* Duty Cycle (3bits), note DC_DISABLE is not specified in
{
u32 l, h;
- if (!cpu_online(cpu) || (newstate > DC_DISABLE) || (newstate == DC_RESV))
+ if (!cpu_online(cpu) ||
+ (newstate > DC_DISABLE) || (newstate == DC_RESV))
return -EINVAL;
rdmsr_on_cpu(cpu, MSR_IA32_THERM_STATUS, &l, &h);
if (l & 0x01)
dprintk("CPU#%d currently thermal throttled\n", cpu);
- if (has_N44_O17_errata[cpu] && (newstate == DC_25PT || newstate == DC_DFLT))
+ if (has_N44_O17_errata[cpu] &&
+ (newstate == DC_25PT || newstate == DC_DFLT))
newstate = DC_38PT;
rdmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, &l, &h);
struct cpufreq_freqs freqs;
int i;
- if (cpufreq_frequency_table_target(policy, &p4clockmod_table[0], target_freq, relation, &newstate))
+ if (cpufreq_frequency_table_target(policy, &p4clockmod_table[0],
+ target_freq, relation, &newstate))
return -EINVAL;
freqs.old = cpufreq_p4_get(policy->cpu);
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
}
- /* run on each logical CPU, see section 13.15.3 of IA32 Intel Architecture Software
+ /* run on each logical CPU,
+ * see section 13.15.3 of IA32 Intel Architecture Software
* Developer's Manual, Volume 3
*/
for_each_cpu(i, policy->cpus)
{
if (c->x86 == 0x06) {
if (cpu_has(c, X86_FEATURE_EST))
- printk(KERN_WARNING PFX "Warning: EST-capable CPU detected. "
- "The acpi-cpufreq module offers voltage scaling"
- " in addition of frequency scaling. You should use "
- "that instead of p4-clockmod, if possible.\n");
+ printk(KERN_WARNING PFX "Warning: EST-capable CPU "
+ "detected. The acpi-cpufreq module offers "
+ "voltage scaling in addition of frequency "
+ "scaling. You should use that instead of "
+ "p4-clockmod, if possible.\n");
switch (c->x86_model) {
case 0x0E: /* Core */
case 0x0F: /* Core Duo */
case 0x16: /* Celeron Core */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PCORE);
+ return speedstep_get_frequency(SPEEDSTEP_CPU_PCORE);
case 0x0D: /* Pentium M (Dothan) */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
/* fall through */
case 0x09: /* Pentium M (Banias) */
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PM);
+ return speedstep_get_frequency(SPEEDSTEP_CPU_PM);
}
}
if (c->x86 != 0xF) {
if (!cpu_has(c, X86_FEATURE_EST))
- printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. "
- "Please send an e-mail to <cpufreq@vger.kernel.org>\n");
+ printk(KERN_WARNING PFX "Unknown CPU. "
+ "Please send an e-mail to "
+ "<cpufreq@vger.kernel.org>\n");
return 0;
}
* throttling is active or not. */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
- if (speedstep_detect_processor() == SPEEDSTEP_PROCESSOR_P4M) {
+ if (speedstep_detect_processor() == SPEEDSTEP_CPU_P4M) {
printk(KERN_WARNING PFX "Warning: Pentium 4-M detected. "
"The speedstep-ich or acpi cpufreq modules offer "
"voltage scaling in addition of frequency scaling. "
"You should use either one instead of p4-clockmod, "
"if possible.\n");
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_P4M);
+ return speedstep_get_frequency(SPEEDSTEP_CPU_P4M);
}
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_P4D);
+ return speedstep_get_frequency(SPEEDSTEP_CPU_P4D);
}
return -EINVAL;
/* table init */
- for (i=1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {
- if ((i<2) && (has_N44_O17_errata[policy->cpu]))
+ for (i = 1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ if ((i < 2) && (has_N44_O17_errata[policy->cpu]))
p4clockmod_table[i].frequency = CPUFREQ_ENTRY_INVALID;
else
p4clockmod_table[i].frequency = (stock_freq * i)/8;
l = DC_DISABLE;
if (l != DC_DISABLE)
- return (stock_freq * l / 8);
+ return stock_freq * l / 8;
return stock_freq;
}
-static struct freq_attr* p4clockmod_attr[] = {
+static struct freq_attr *p4clockmod_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
ret = cpufreq_register_driver(&p4clockmod_driver);
if (!ret)
- printk(KERN_INFO PFX "P4/Xeon(TM) CPU On-Demand Clock Modulation available\n");
+ printk(KERN_INFO PFX "P4/Xeon(TM) CPU On-Demand Clock "
+ "Modulation available\n");
- return (ret);
+ return ret;
}
}
-MODULE_AUTHOR ("Zwane Mwaikambo <zwane@commfireservices.com>");
-MODULE_DESCRIPTION ("cpufreq driver for Pentium(TM) 4/Xeon(TM)");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("Zwane Mwaikambo <zwane@commfireservices.com>");
+MODULE_DESCRIPTION("cpufreq driver for Pentium(TM) 4/Xeon(TM)");
+MODULE_LICENSE("GPL");
late_initcall(cpufreq_p4_init);
module_exit(cpufreq_p4_exit);
/* speedstep_processor
*/
-static unsigned int speedstep_processor = 0;
+static unsigned int speedstep_processor;
static u32 pmbase;
};
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-ich", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
+ "speedstep-ich", msg)
/**
*
* Returns: -ENODEV if no register could be found
*/
-static int speedstep_find_register (void)
+static int speedstep_find_register(void)
{
if (!speedstep_chipset_dev)
return -ENODEV;
*
* Tries to change the SpeedStep state.
*/
-static void speedstep_set_state (unsigned int state)
+static void speedstep_set_state(unsigned int state)
{
u8 pm2_blk;
u8 value;
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");
- }
+ if (state == (value & 0x1))
+ dprintk("change to %u MHz succeeded\n",
+ speedstep_get_frequency(speedstep_processor) / 1000);
+ else
+ printk(KERN_ERR "cpufreq: change failed - I/O error\n");
return;
}
* Tries to activate the SpeedStep status and control registers.
* Returns -EINVAL on an unsupported chipset, and zero on success.
*/
-static int speedstep_activate (void)
+static int speedstep_activate(void)
{
u16 value = 0;
* functions. Returns the SPEEDSTEP_CHIPSET_-number for the detected
* chipset, or zero on failure.
*/
-static unsigned int speedstep_detect_chipset (void)
+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,
+ 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,
+ 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,
+ PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (speedstep_chipset_dev) {
/* speedstep.c causes lockups on Dell Inspirons 8000 and
hostbridge = pci_get_subsys(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82815_MC,
- PCI_ANY_ID,
- PCI_ANY_ID,
+ PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (!hostbridge)
cpus_allowed = current->cpus_allowed;
set_cpus_allowed_ptr(current, cpus);
- speed = speedstep_get_processor_frequency(speedstep_processor);
+ speed = speedstep_get_frequency(speedstep_processor);
set_cpus_allowed_ptr(current, &cpus_allowed);
dprintk("detected %u kHz as current frequency\n", speed);
return speed;
* 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)
+ * @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,
+static int speedstep_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
cpumask_t cpus_allowed;
int i;
- if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
+ if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0],
+ target_freq, relation, &newstate))
return -EINVAL;
freqs.old = _speedstep_get(policy->cpus);
* 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)
+static int speedstep_verify(struct cpufreq_policy *policy)
{
return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]);
}
return -EIO;
dprintk("currently at %s speed setting - %i MHz\n",
- (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
+ (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency)
+ ? "low" : "high",
(speed / 1000));
/* cpuinfo and default policy values */
result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
if (result)
- return (result);
+ return result;
- cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
+ cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
return 0;
}
return 0;
}
-static struct freq_attr* speedstep_attr[] = {
+static struct freq_attr *speedstep_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
/* detect processor */
speedstep_processor = speedstep_detect_processor();
if (!speedstep_processor) {
- dprintk("Intel(R) SpeedStep(TM) capable processor not found\n");
+ 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");
+ dprintk("Intel(R) SpeedStep(TM) for this chipset not "
+ "(yet) available.\n");
return -ENODEV;
}
}
-MODULE_AUTHOR ("Dave Jones <davej@redhat.com>, Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION ("Speedstep driver for Intel mobile processors on chipsets with ICH-M southbridges.");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("Dave Jones <davej@redhat.com>, "
+ "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);
#include <asm/msr.h>
#include "speedstep-lib.h"
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-lib", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
+ "speedstep-lib", msg)
+
+#define PFX "speedstep-lib: "
#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
-static int relaxed_check = 0;
+static int relaxed_check;
#else
#define relaxed_check 0
#endif
* GET PROCESSOR CORE SPEED IN KHZ *
*********************************************************************/
-static unsigned int pentium3_get_frequency (unsigned int processor)
+static unsigned int pentium3_get_frequency(unsigned int processor)
{
- /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
+ /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
struct {
unsigned int ratio; /* Frequency Multiplier (x10) */
u8 bitmap; /* power on configuration bits
[27, 25:22] (in MSR 0x2a) */
- } msr_decode_mult [] = {
+ } msr_decode_mult[] = {
{ 30, 0x01 },
{ 35, 0x05 },
{ 40, 0x02 },
{ 85, 0x26 },
{ 90, 0x20 },
{ 100, 0x2b },
- { 0, 0xff } /* error or unknown value */
+ { 0, 0xff } /* error or unknown value */
};
/* PIII(-M) FSB settings: see table b1-b of 24547206.pdf */
unsigned int value; /* Front Side Bus speed in MHz */
u8 bitmap; /* power on configuration bits [18: 19]
(in MSR 0x2a) */
- } msr_decode_fsb [] = {
+ } msr_decode_fsb[] = {
{ 66, 0x0 },
{ 100, 0x2 },
{ 133, 0x1 },
}
/* decode the multiplier */
- if (processor == SPEEDSTEP_PROCESSOR_PIII_C_EARLY) {
+ if (processor == SPEEDSTEP_CPU_PIII_C_EARLY) {
dprintk("workaround for early PIIIs\n");
msr_lo &= 0x03c00000;
} else
j++;
}
- dprintk("speed is %u\n", (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
+ dprintk("speed is %u\n",
+ (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
- return (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100);
+ return msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100;
}
/* see table B-2 of 24547212.pdf */
if (msr_lo & 0x00040000) {
- printk(KERN_DEBUG "speedstep-lib: PM - invalid FSB: 0x%x 0x%x\n", msr_lo, msr_tmp);
+ printk(KERN_DEBUG PFX "PM - invalid FSB: 0x%x 0x%x\n",
+ msr_lo, msr_tmp);
return 0;
}
msr_tmp = (msr_lo >> 22) & 0x1f;
- dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * 100 * 1000));
+ dprintk("bits 22-26 are 0x%x, speed is %u\n",
+ msr_tmp, (msr_tmp * 100 * 1000));
- return (msr_tmp * 100 * 1000);
+ return msr_tmp * 100 * 1000;
}
static unsigned int pentium_core_get_frequency(void)
{
u32 fsb = 0;
u32 msr_lo, msr_tmp;
+ int ret;
rdmsr(MSR_FSB_FREQ, msr_lo, msr_tmp);
/* see table B-2 of 25366920.pdf */
}
rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
- dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp);
+ dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n",
+ msr_lo, msr_tmp);
msr_tmp = (msr_lo >> 22) & 0x1f;
- dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * fsb));
+ dprintk("bits 22-26 are 0x%x, speed is %u\n",
+ msr_tmp, (msr_tmp * fsb));
- return (msr_tmp * fsb);
+ ret = (msr_tmp * fsb);
+ return ret;
}
struct cpuinfo_x86 *c = &boot_cpu_data;
u32 msr_lo, msr_hi, mult;
unsigned int fsb = 0;
+ unsigned int ret;
rdmsr(0x2c, msr_lo, msr_hi);
}
if (!fsb)
- printk(KERN_DEBUG "speedstep-lib: couldn't detect FSB speed. Please send an e-mail to <linux@brodo.de>\n");
+ printk(KERN_DEBUG PFX "couldn't detect FSB speed. "
+ "Please send an e-mail to <linux@brodo.de>\n");
/* Multiplier. */
mult = msr_lo >> 24;
- dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n", fsb, mult, (fsb * mult));
+ dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n",
+ fsb, mult, (fsb * mult));
- return (fsb * mult);
+ ret = (fsb * mult);
+ return ret;
}
-unsigned int speedstep_get_processor_frequency(unsigned int processor)
+unsigned int speedstep_get_frequency(unsigned int processor)
{
switch (processor) {
- case SPEEDSTEP_PROCESSOR_PCORE:
+ case SPEEDSTEP_CPU_PCORE:
return pentium_core_get_frequency();
- case SPEEDSTEP_PROCESSOR_PM:
+ case SPEEDSTEP_CPU_PM:
return pentiumM_get_frequency();
- case SPEEDSTEP_PROCESSOR_P4D:
- case SPEEDSTEP_PROCESSOR_P4M:
+ case SPEEDSTEP_CPU_P4D:
+ case SPEEDSTEP_CPU_P4M:
return pentium4_get_frequency();
- case SPEEDSTEP_PROCESSOR_PIII_T:
- case SPEEDSTEP_PROCESSOR_PIII_C:
- case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
+ case SPEEDSTEP_CPU_PIII_T:
+ case SPEEDSTEP_CPU_PIII_C:
+ case SPEEDSTEP_CPU_PIII_C_EARLY:
return pentium3_get_frequency(processor);
default:
return 0;
};
return 0;
}
-EXPORT_SYMBOL_GPL(speedstep_get_processor_frequency);
+EXPORT_SYMBOL_GPL(speedstep_get_frequency);
/*********************************************************************
* DETECT SPEEDSTEP-CAPABLE PROCESSOR *
*********************************************************************/
-unsigned int speedstep_detect_processor (void)
+unsigned int speedstep_detect_processor(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
u32 ebx, msr_lo, msr_hi;
* sample has ebx = 0x0f, production has 0x0e.
*/
if ((ebx == 0x0e) || (ebx == 0x0f))
- return SPEEDSTEP_PROCESSOR_P4M;
+ return SPEEDSTEP_CPU_P4M;
break;
case 7:
/*
* samples are only of B-stepping...
*/
if (ebx == 0x0e)
- return SPEEDSTEP_PROCESSOR_P4M;
+ return SPEEDSTEP_CPU_P4M;
break;
case 9:
/*
* M-P4-Ms may have either ebx=0xe or 0xf [see above]
* M-P4/533 have either ebx=0xe or 0xf. [25317607.pdf]
* also, M-P4M HTs have ebx=0x8, too
- * For now, they are distinguished by the model_id string
+ * For now, they are distinguished by the model_id
+ * string
*/
- if ((ebx == 0x0e) || (strstr(c->x86_model_id,"Mobile Intel(R) Pentium(R) 4") != NULL))
- return SPEEDSTEP_PROCESSOR_P4M;
+ if ((ebx == 0x0e) ||
+ (strstr(c->x86_model_id,
+ "Mobile Intel(R) Pentium(R) 4") != NULL))
+ return SPEEDSTEP_CPU_P4M;
break;
default:
break;
switch (c->x86_model) {
case 0x0B: /* Intel PIII [Tualatin] */
- /* cpuid_ebx(1) is 0x04 for desktop PIII, 0x06 for mobile PIII-M */
+ /* cpuid_ebx(1) is 0x04 for desktop PIII,
+ * 0x06 for mobile PIII-M */
ebx = cpuid_ebx(0x00000001);
dprintk("ebx is %x\n", ebx);
/* So far all PIII-M processors support SpeedStep. See
* Intel's 24540640.pdf of June 2003
*/
- return SPEEDSTEP_PROCESSOR_PIII_T;
+ return SPEEDSTEP_CPU_PIII_T;
case 0x08: /* Intel PIII [Coppermine] */
/* all mobile PIII Coppermines have FSB 100 MHz
* ==> sort out a few desktop PIIIs. */
rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_hi);
- dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n", msr_lo, msr_hi);
+ dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n",
+ msr_lo, msr_hi);
msr_lo &= 0x00c0000;
if (msr_lo != 0x0080000)
return 0;
* bit 56 or 57 is set
*/
rdmsr(MSR_IA32_PLATFORM_ID, msr_lo, msr_hi);
- dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n", msr_lo, msr_hi);
- if ((msr_hi & (1<<18)) && (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
+ dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n",
+ msr_lo, msr_hi);
+ if ((msr_hi & (1<<18)) &&
+ (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
if (c->x86_mask == 0x01) {
dprintk("early PIII version\n");
- return SPEEDSTEP_PROCESSOR_PIII_C_EARLY;
+ return SPEEDSTEP_CPU_PIII_C_EARLY;
} else
- return SPEEDSTEP_PROCESSOR_PIII_C;
+ return SPEEDSTEP_CPU_PIII_C;
}
default:
dprintk("trying to determine both speeds\n");
/* get current speed */
- prev_speed = speedstep_get_processor_frequency(processor);
+ prev_speed = speedstep_get_frequency(processor);
if (!prev_speed)
return -EIO;
/* switch to low state */
set_state(SPEEDSTEP_LOW);
- *low_speed = speedstep_get_processor_frequency(processor);
+ *low_speed = speedstep_get_frequency(processor);
if (!*low_speed) {
ret = -EIO;
goto out;
if (transition_latency)
do_gettimeofday(&tv2);
- *high_speed = speedstep_get_processor_frequency(processor);
+ *high_speed = speedstep_get_frequency(processor);
if (!*high_speed) {
ret = -EIO;
goto out;
/* check if the latency measurement is too high or too low
* and set it to a safe value (500uSec) in that case
*/
- if (*transition_latency > 10000000 || *transition_latency < 50000) {
- printk (KERN_WARNING "speedstep: frequency transition measured seems out of "
- "range (%u nSec), falling back to a safe one of %u nSec.\n",
+ if (*transition_latency > 10000000 ||
+ *transition_latency < 50000) {
+ printk(KERN_WARNING PFX "frequency transition "
+ "measured seems out of range (%u "
+ "nSec), falling back to a safe one of"
+ "%u nSec.\n",
*transition_latency, 500000);
*transition_latency = 500000;
}
out:
local_irq_restore(flags);
- return (ret);
+ return ret;
}
EXPORT_SYMBOL_GPL(speedstep_get_freqs);
#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
module_param(relaxed_check, int, 0444);
-MODULE_PARM_DESC(relaxed_check, "Don't do all checks for speedstep capability.");
+MODULE_PARM_DESC(relaxed_check,
+ "Don't do all checks for speedstep capability.");
#endif
-MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION ("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
+MODULE_LICENSE("GPL");
/* processors */
-#define SPEEDSTEP_PROCESSOR_PIII_C_EARLY 0x00000001 /* Coppermine core */
-#define SPEEDSTEP_PROCESSOR_PIII_C 0x00000002 /* Coppermine core */
-#define SPEEDSTEP_PROCESSOR_PIII_T 0x00000003 /* Tualatin core */
-#define SPEEDSTEP_PROCESSOR_P4M 0x00000004 /* P4-M */
+#define SPEEDSTEP_CPU_PIII_C_EARLY 0x00000001 /* Coppermine core */
+#define SPEEDSTEP_CPU_PIII_C 0x00000002 /* Coppermine core */
+#define SPEEDSTEP_CPU_PIII_T 0x00000003 /* Tualatin core */
+#define SPEEDSTEP_CPU_P4M 0x00000004 /* P4-M */
/* the following processors are not speedstep-capable and are not auto-detected
* in speedstep_detect_processor(). However, their speed can be detected using
- * the speedstep_get_processor_frequency() call. */
-#define SPEEDSTEP_PROCESSOR_PM 0xFFFFFF03 /* Pentium M */
-#define SPEEDSTEP_PROCESSOR_P4D 0xFFFFFF04 /* desktop P4 */
-#define SPEEDSTEP_PROCESSOR_PCORE 0xFFFFFF05 /* Core */
+ * the speedstep_get_frequency() call. */
+#define SPEEDSTEP_CPU_PM 0xFFFFFF03 /* Pentium M */
+#define SPEEDSTEP_CPU_P4D 0xFFFFFF04 /* desktop P4 */
+#define SPEEDSTEP_CPU_PCORE 0xFFFFFF05 /* Core */
/* speedstep states -- only two of them */
extern unsigned int speedstep_detect_processor (void);
/* detect the current speed (in khz) of the processor */
-extern unsigned int speedstep_get_processor_frequency(unsigned int processor);
+extern unsigned int speedstep_get_frequency(unsigned int processor);
/* detect the low and high speeds of the processor. The callback
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/io.h>
#include <asm/ist.h>
-#include <asm/io.h>
#include "speedstep-lib.h"
* If user gives it, these are used.
*
*/
-static int smi_port = 0;
-static int smi_cmd = 0;
-static unsigned int smi_sig = 0;
+static int smi_port;
+static int smi_cmd;
+static unsigned int smi_sig;
/* info about the processor */
-static unsigned int speedstep_processor = 0;
+static unsigned int speedstep_processor;
/*
* There are only two frequency states for each processor. Values
* of DMA activity going on? */
#define SMI_TRIES 5
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-smi", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
+ "speedstep-smi", msg)
/**
* speedstep_smi_ownership
*/
-static int speedstep_smi_ownership (void)
+static int speedstep_smi_ownership(void)
{
u32 command, result, magic, dummy;
u32 function = GET_SPEEDSTEP_OWNER;
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
magic = virt_to_phys(magic_data);
- dprintk("trying to obtain ownership with command %x at port %x\n", command, smi_port);
+ dprintk("trying to obtain ownership with command %x at port %x\n",
+ command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp\n"
- : "=D" (result), "=a" (dummy), "=b" (dummy), "=c" (dummy), "=d" (dummy),
- "=S" (dummy)
+ : "=D" (result),
+ "=a" (dummy), "=b" (dummy), "=c" (dummy), "=d" (dummy),
+ "=S" (dummy)
: "a" (command), "b" (function), "c" (0), "d" (smi_port),
- "D" (0), "S" (magic)
+ "D" (0), "S" (magic)
: "memory"
);
* even hangs [cf. bugme.osdl.org # 1422] on earlier systems. Empirical testing
* shows that the latter occurs if !(ist_info.event & 0xFFFF).
*/
-static int speedstep_smi_get_freqs (unsigned int *low, unsigned int *high)
+static int speedstep_smi_get_freqs(unsigned int *low, unsigned int *high)
{
u32 command, result = 0, edi, high_mhz, low_mhz, dummy;
- u32 state=0;
+ u32 state = 0;
u32 function = GET_SPEEDSTEP_FREQS;
if (!(ist_info.event & 0xFFFF)) {
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
- dprintk("trying to determine frequencies with command %x at port %x\n", command, smi_port);
+ dprintk("trying to determine frequencies with command %x at port %x\n",
+ command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp"
- : "=a" (result), "=b" (high_mhz), "=c" (low_mhz), "=d" (state), "=D" (edi), "=S" (dummy)
- : "a" (command), "b" (function), "c" (state), "d" (smi_port), "S" (0), "D" (0)
+ : "=a" (result),
+ "=b" (high_mhz),
+ "=c" (low_mhz),
+ "=d" (state), "=D" (edi), "=S" (dummy)
+ : "a" (command),
+ "b" (function),
+ "c" (state),
+ "d" (smi_port), "S" (0), "D" (0)
);
- dprintk("result %x, low_freq %u, high_freq %u\n", result, low_mhz, high_mhz);
+ dprintk("result %x, low_freq %u, high_freq %u\n",
+ result, low_mhz, high_mhz);
/* abort if results are obviously incorrect... */
if ((high_mhz + low_mhz) < 600)
* @state: processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
*
*/
-static int speedstep_get_state (void)
+static int speedstep_get_state(void)
{
- u32 function=GET_SPEEDSTEP_STATE;
+ u32 function = GET_SPEEDSTEP_STATE;
u32 result, state, edi, command, dummy;
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
- dprintk("trying to determine current setting with command %x at port %x\n", command, smi_port);
+ dprintk("trying to determine current setting with command %x "
+ "at port %x\n", command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp\n"
- : "=a" (result), "=b" (state), "=D" (edi), "=c" (dummy), "=d" (dummy), "=S" (dummy)
- : "a" (command), "b" (function), "c" (0), "d" (smi_port), "S" (0), "D" (0)
+ : "=a" (result),
+ "=b" (state), "=D" (edi),
+ "=c" (dummy), "=d" (dummy), "=S" (dummy)
+ : "a" (command), "b" (function), "c" (0),
+ "d" (smi_port), "S" (0), "D" (0)
);
dprintk("state is %x, result is %x\n", state, result);
- return (state & 1);
+ return state & 1;
}
* @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
*
*/
-static void speedstep_set_state (unsigned int state)
+static void speedstep_set_state(unsigned int state)
{
unsigned int result = 0, command, new_state, dummy;
unsigned long flags;
- unsigned int function=SET_SPEEDSTEP_STATE;
+ unsigned int function = SET_SPEEDSTEP_STATE;
unsigned int retry = 0;
if (state > 0x1)
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
- dprintk("trying to set frequency to state %u with command %x at port %x\n", state, command, smi_port);
+ dprintk("trying to set frequency to state %u "
+ "with command %x at port %x\n",
+ state, command, smi_port);
do {
if (retry) {
- dprintk("retry %u, previous result %u, waiting...\n", retry, result);
+ dprintk("retry %u, previous result %u, waiting...\n",
+ retry, result);
mdelay(retry * 50);
}
retry++;
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp"
- : "=b" (new_state), "=D" (result), "=c" (dummy), "=a" (dummy),
- "=d" (dummy), "=S" (dummy)
- : "a" (command), "b" (function), "c" (state), "d" (smi_port), "S" (0), "D" (0)
+ : "=b" (new_state), "=D" (result),
+ "=c" (dummy), "=a" (dummy),
+ "=d" (dummy), "=S" (dummy)
+ : "a" (command), "b" (function), "c" (state),
+ "d" (smi_port), "S" (0), "D" (0)
);
} while ((new_state != state) && (retry <= SMI_TRIES));
/* enable IRQs */
local_irq_restore(flags);
- if (new_state == state) {
- dprintk("change to %u MHz succeeded after %u tries with result %u\n", (speedstep_freqs[new_state].frequency / 1000), retry, result);
- } else {
- printk(KERN_ERR "cpufreq: change to state %u failed with new_state %u and result %u\n", state, new_state, result);
- }
+ if (new_state == state)
+ dprintk("change to %u MHz succeeded after %u tries "
+ "with result %u\n",
+ (speedstep_freqs[new_state].frequency / 1000),
+ retry, result);
+ else
+ printk(KERN_ERR "cpufreq: change to state %u "
+ "failed with new_state %u and result %u\n",
+ state, new_state, result);
return;
}
*
* Sets a new CPUFreq policy/freq.
*/
-static int speedstep_target (struct cpufreq_policy *policy,
+static int speedstep_target(struct cpufreq_policy *policy,
unsigned int target_freq, unsigned int relation)
{
unsigned int newstate = 0;
struct cpufreq_freqs freqs;
- if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
+ if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0],
+ target_freq, relation, &newstate))
return -EINVAL;
freqs.old = speedstep_freqs[speedstep_get_state()].frequency;
* 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)
+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;
- unsigned int speed,state;
+ unsigned int speed, state;
+ unsigned int *low, *high;
/* capability check */
if (policy->cpu != 0)
}
/* detect low and high frequency */
- result = speedstep_smi_get_freqs(&speedstep_freqs[SPEEDSTEP_LOW].frequency,
- &speedstep_freqs[SPEEDSTEP_HIGH].frequency);
+ low = &speedstep_freqs[SPEEDSTEP_LOW].frequency;
+ high = &speedstep_freqs[SPEEDSTEP_HIGH].frequency;
+
+ result = speedstep_smi_get_freqs(low, high);
if (result) {
- /* fall back to speedstep_lib.c dection mechanism: try both states out */
- dprintk("could not detect low and high frequencies by SMI call.\n");
+ /* fall back to speedstep_lib.c dection mechanism:
+ * try both states out */
+ dprintk("could not detect low and high frequencies "
+ "by SMI call.\n");
result = speedstep_get_freqs(speedstep_processor,
- &speedstep_freqs[SPEEDSTEP_LOW].frequency,
- &speedstep_freqs[SPEEDSTEP_HIGH].frequency,
+ low, high,
NULL,
&speedstep_set_state);
if (result) {
- dprintk("could not detect two different speeds -- aborting.\n");
+ dprintk("could not detect two different speeds"
+ " -- aborting.\n");
return result;
} else
dprintk("workaround worked.\n");
speed = speedstep_freqs[state].frequency;
dprintk("currently at %s speed setting - %i MHz\n",
- (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
+ (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency)
+ ? "low" : "high",
(speed / 1000));
/* cpuinfo and default policy values */
result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
if (result)
- return (result);
+ return result;
cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
{
if (cpu)
return -ENODEV;
- return speedstep_get_processor_frequency(speedstep_processor);
+ return speedstep_get_frequency(speedstep_processor);
}
return result;
}
-static struct freq_attr* speedstep_attr[] = {
+static struct freq_attr *speedstep_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
speedstep_processor = speedstep_detect_processor();
switch (speedstep_processor) {
- case SPEEDSTEP_PROCESSOR_PIII_T:
- case SPEEDSTEP_PROCESSOR_PIII_C:
- case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
+ case SPEEDSTEP_CPU_PIII_T:
+ case SPEEDSTEP_CPU_PIII_C:
+ case SPEEDSTEP_CPU_PIII_C_EARLY:
break;
default:
speedstep_processor = 0;
}
if (!speedstep_processor) {
- dprintk ("No supported Intel CPU detected.\n");
+ dprintk("No supported Intel CPU detected.\n");
return -ENODEV;
}
- dprintk("signature:0x%.8lx, command:0x%.8lx, event:0x%.8lx, perf_level:0x%.8lx.\n",
- ist_info.signature, ist_info.command, ist_info.event, ist_info.perf_level);
+ dprintk("signature:0x%.8lx, command:0x%.8lx, "
+ "event:0x%.8lx, perf_level:0x%.8lx.\n",
+ ist_info.signature, ist_info.command,
+ ist_info.event, ist_info.perf_level);
/* Error if no IST-SMI BIOS or no PARM
sig= 'ISGE' aka 'Intel Speedstep Gate E' */
cpufreq_unregister_driver(&speedstep_driver);
}
-module_param(smi_port, int, 0444);
-module_param(smi_cmd, int, 0444);
-module_param(smi_sig, uint, 0444);
+module_param(smi_port, int, 0444);
+module_param(smi_cmd, int, 0444);
+module_param(smi_sig, uint, 0444);
-MODULE_PARM_DESC(smi_port, "Override the BIOS-given IST port with this value -- Intel's default setting is 0xb2");
-MODULE_PARM_DESC(smi_cmd, "Override the BIOS-given IST command with this value -- Intel's default setting is 0x82");
-MODULE_PARM_DESC(smi_sig, "Set to 1 to fake the IST signature when using the SMI interface.");
+MODULE_PARM_DESC(smi_port, "Override the BIOS-given IST port with this value "
+ "-- Intel's default setting is 0xb2");
+MODULE_PARM_DESC(smi_cmd, "Override the BIOS-given IST command with this value "
+ "-- Intel's default setting is 0x82");
+MODULE_PARM_DESC(smi_sig, "Set to 1 to fake the IST signature when using the "
+ "SMI interface.");
-MODULE_AUTHOR ("Hiroshi Miura");
-MODULE_DESCRIPTION ("Speedstep driver for IST applet SMI interface.");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("Hiroshi Miura");
+MODULE_DESCRIPTION("Speedstep driver for IST applet SMI interface.");
+MODULE_LICENSE("GPL");
module_init(speedstep_init);
module_exit(speedstep_exit);
projects / kernel.git / commitdiff