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Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/speedstep-ich.c')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-ich.c70
1 files changed, 37 insertions, 33 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index dedc1e98f168..8bbb11adb315 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -39,7 +39,7 @@ static struct pci_dev *speedstep_chipset_dev;
39 39
40/* speedstep_processor 40/* speedstep_processor
41 */ 41 */
42static unsigned int speedstep_processor = 0; 42static unsigned int speedstep_processor;
43 43
44static u32 pmbase; 44static u32 pmbase;
45 45
@@ -54,7 +54,8 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
54}; 54};
55 55
56 56
57#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-ich", msg) 57#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
58 "speedstep-ich", msg)
58 59
59 60
60/** 61/**
@@ -62,7 +63,7 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
62 * 63 *
63 * Returns: -ENODEV if no register could be found 64 * Returns: -ENODEV if no register could be found
64 */ 65 */
65static int speedstep_find_register (void) 66static int speedstep_find_register(void)
66{ 67{
67 if (!speedstep_chipset_dev) 68 if (!speedstep_chipset_dev)
68 return -ENODEV; 69 return -ENODEV;
@@ -90,7 +91,7 @@ static int speedstep_find_register (void)
90 * 91 *
91 * Tries to change the SpeedStep state. 92 * Tries to change the SpeedStep state.
92 */ 93 */
93static void speedstep_set_state (unsigned int state) 94static void speedstep_set_state(unsigned int state)
94{ 95{
95 u8 pm2_blk; 96 u8 pm2_blk;
96 u8 value; 97 u8 value;
@@ -133,11 +134,11 @@ static void speedstep_set_state (unsigned int state)
133 134
134 dprintk("read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value); 135 dprintk("read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value);
135 136
136 if (state == (value & 0x1)) { 137 if (state == (value & 0x1))
137 dprintk("change to %u MHz succeeded\n", (speedstep_get_processor_frequency(speedstep_processor) / 1000)); 138 dprintk("change to %u MHz succeeded\n",
138 } else { 139 speedstep_get_frequency(speedstep_processor) / 1000);
139 printk (KERN_ERR "cpufreq: change failed - I/O error\n"); 140 else
140 } 141 printk(KERN_ERR "cpufreq: change failed - I/O error\n");
141 142
142 return; 143 return;
143} 144}
@@ -149,7 +150,7 @@ static void speedstep_set_state (unsigned int state)
149 * Tries to activate the SpeedStep status and control registers. 150 * Tries to activate the SpeedStep status and control registers.
150 * Returns -EINVAL on an unsupported chipset, and zero on success. 151 * Returns -EINVAL on an unsupported chipset, and zero on success.
151 */ 152 */
152static int speedstep_activate (void) 153static int speedstep_activate(void)
153{ 154{
154 u16 value = 0; 155 u16 value = 0;
155 156
@@ -175,20 +176,18 @@ static int speedstep_activate (void)
175 * functions. Returns the SPEEDSTEP_CHIPSET_-number for the detected 176 * functions. Returns the SPEEDSTEP_CHIPSET_-number for the detected
176 * chipset, or zero on failure. 177 * chipset, or zero on failure.
177 */ 178 */
178static unsigned int speedstep_detect_chipset (void) 179static unsigned int speedstep_detect_chipset(void)
179{ 180{
180 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, 181 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
181 PCI_DEVICE_ID_INTEL_82801DB_12, 182 PCI_DEVICE_ID_INTEL_82801DB_12,
182 PCI_ANY_ID, 183 PCI_ANY_ID, PCI_ANY_ID,
183 PCI_ANY_ID,
184 NULL); 184 NULL);
185 if (speedstep_chipset_dev) 185 if (speedstep_chipset_dev)
186 return 4; /* 4-M */ 186 return 4; /* 4-M */
187 187
188 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, 188 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
189 PCI_DEVICE_ID_INTEL_82801CA_12, 189 PCI_DEVICE_ID_INTEL_82801CA_12,
190 PCI_ANY_ID, 190 PCI_ANY_ID, PCI_ANY_ID,
191 PCI_ANY_ID,
192 NULL); 191 NULL);
193 if (speedstep_chipset_dev) 192 if (speedstep_chipset_dev)
194 return 3; /* 3-M */ 193 return 3; /* 3-M */
@@ -196,8 +195,7 @@ static unsigned int speedstep_detect_chipset (void)
196 195
197 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, 196 speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
198 PCI_DEVICE_ID_INTEL_82801BA_10, 197 PCI_DEVICE_ID_INTEL_82801BA_10,
199 PCI_ANY_ID, 198 PCI_ANY_ID, PCI_ANY_ID,
200 PCI_ANY_ID,
201 NULL); 199 NULL);
202 if (speedstep_chipset_dev) { 200 if (speedstep_chipset_dev) {
203 /* speedstep.c causes lockups on Dell Inspirons 8000 and 201 /* speedstep.c causes lockups on Dell Inspirons 8000 and
@@ -208,8 +206,7 @@ static unsigned int speedstep_detect_chipset (void)
208 206
209 hostbridge = pci_get_subsys(PCI_VENDOR_ID_INTEL, 207 hostbridge = pci_get_subsys(PCI_VENDOR_ID_INTEL,
210 PCI_DEVICE_ID_INTEL_82815_MC, 208 PCI_DEVICE_ID_INTEL_82815_MC,
211 PCI_ANY_ID, 209 PCI_ANY_ID, PCI_ANY_ID,
212 PCI_ANY_ID,
213 NULL); 210 NULL);
214 211
215 if (!hostbridge) 212 if (!hostbridge)
@@ -236,7 +233,7 @@ static unsigned int _speedstep_get(const struct cpumask *cpus)
236 233
237 cpus_allowed = current->cpus_allowed; 234 cpus_allowed = current->cpus_allowed;
238 set_cpus_allowed_ptr(current, cpus); 235 set_cpus_allowed_ptr(current, cpus);
239 speed = speedstep_get_processor_frequency(speedstep_processor); 236 speed = speedstep_get_frequency(speedstep_processor);
240 set_cpus_allowed_ptr(current, &cpus_allowed); 237 set_cpus_allowed_ptr(current, &cpus_allowed);
241 dprintk("detected %u kHz as current frequency\n", speed); 238 dprintk("detected %u kHz as current frequency\n", speed);
242 return speed; 239 return speed;
@@ -251,11 +248,12 @@ static unsigned int speedstep_get(unsigned int cpu)
251 * speedstep_target - set a new CPUFreq policy 248 * speedstep_target - set a new CPUFreq policy
252 * @policy: new policy 249 * @policy: new policy
253 * @target_freq: the target frequency 250 * @target_freq: the target frequency
254 * @relation: how that frequency relates to achieved frequency (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H) 251 * @relation: how that frequency relates to achieved frequency
252 * (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
255 * 253 *
256 * Sets a new CPUFreq policy. 254 * Sets a new CPUFreq policy.
257 */ 255 */
258static int speedstep_target (struct cpufreq_policy *policy, 256static int speedstep_target(struct cpufreq_policy *policy,
259 unsigned int target_freq, 257 unsigned int target_freq,
260 unsigned int relation) 258 unsigned int relation)
261{ 259{
@@ -264,7 +262,8 @@ static int speedstep_target (struct cpufreq_policy *policy,
264 cpumask_t cpus_allowed; 262 cpumask_t cpus_allowed;
265 int i; 263 int i;
266 264
267 if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate)) 265 if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0],
266 target_freq, relation, &newstate))
268 return -EINVAL; 267 return -EINVAL;
269 268
270 freqs.old = _speedstep_get(policy->cpus); 269 freqs.old = _speedstep_get(policy->cpus);
@@ -308,7 +307,7 @@ static int speedstep_target (struct cpufreq_policy *policy,
308 * Limit must be within speedstep_low_freq and speedstep_high_freq, with 307 * Limit must be within speedstep_low_freq and speedstep_high_freq, with
309 * at least one border included. 308 * at least one border included.
310 */ 309 */
311static int speedstep_verify (struct cpufreq_policy *policy) 310static int speedstep_verify(struct cpufreq_policy *policy)
312{ 311{
313 return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]); 312 return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]);
314} 313}
@@ -344,7 +343,8 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
344 return -EIO; 343 return -EIO;
345 344
346 dprintk("currently at %s speed setting - %i MHz\n", 345 dprintk("currently at %s speed setting - %i MHz\n",
347 (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high", 346 (speed == speedstep_freqs[SPEEDSTEP_LOW].frequency)
347 ? "low" : "high",
348 (speed / 1000)); 348 (speed / 1000));
349 349
350 /* cpuinfo and default policy values */ 350 /* cpuinfo and default policy values */
@@ -352,9 +352,9 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
352 352
353 result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs); 353 result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
354 if (result) 354 if (result)
355 return (result); 355 return result;
356 356
357 cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu); 357 cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
358 358
359 return 0; 359 return 0;
360} 360}
@@ -366,7 +366,7 @@ static int speedstep_cpu_exit(struct cpufreq_policy *policy)
366 return 0; 366 return 0;
367} 367}
368 368
369static struct freq_attr* speedstep_attr[] = { 369static struct freq_attr *speedstep_attr[] = {
370 &cpufreq_freq_attr_scaling_available_freqs, 370 &cpufreq_freq_attr_scaling_available_freqs,
371 NULL, 371 NULL,
372}; 372};
@@ -396,13 +396,15 @@ static int __init speedstep_init(void)
396 /* detect processor */ 396 /* detect processor */
397 speedstep_processor = speedstep_detect_processor(); 397 speedstep_processor = speedstep_detect_processor();
398 if (!speedstep_processor) { 398 if (!speedstep_processor) {
399 dprintk("Intel(R) SpeedStep(TM) capable processor not found\n"); 399 dprintk("Intel(R) SpeedStep(TM) capable processor "
400 "not found\n");
400 return -ENODEV; 401 return -ENODEV;
401 } 402 }
402 403
403 /* detect chipset */ 404 /* detect chipset */
404 if (!speedstep_detect_chipset()) { 405 if (!speedstep_detect_chipset()) {
405 dprintk("Intel(R) SpeedStep(TM) for this chipset not (yet) available.\n"); 406 dprintk("Intel(R) SpeedStep(TM) for this chipset not "
407 "(yet) available.\n");
406 return -ENODEV; 408 return -ENODEV;
407 } 409 }
408 410
@@ -431,9 +433,11 @@ static void __exit speedstep_exit(void)
431} 433}
432 434
433 435
434MODULE_AUTHOR ("Dave Jones <davej@redhat.com>, Dominik Brodowski <linux@brodo.de>"); 436MODULE_AUTHOR("Dave Jones <davej@redhat.com>, "
435MODULE_DESCRIPTION ("Speedstep driver for Intel mobile processors on chipsets with ICH-M southbridges."); 437 "Dominik Brodowski <linux@brodo.de>");
436MODULE_LICENSE ("GPL"); 438MODULE_DESCRIPTION("Speedstep driver for Intel mobile processors on chipsets "
439 "with ICH-M southbridges.");
440MODULE_LICENSE("GPL");
437 441
438module_init(speedstep_init); 442module_init(speedstep_init);
439module_exit(speedstep_exit); 443module_exit(speedstep_exit);