#include "speedstep-lib.h"
+#define PFX "speedstep-smi: "
+
/* speedstep system management interface port/command.
*
* These parameters are got from IST-SMI BIOS call.
* of DMA activity going on? */
#define SMI_TRIES 5
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-smi", msg)
+/* DEBUG
+ * Define it if you want verbose debug output, e.g. for bug reporting
+ */
+//#define SPEEDSTEP_DEBUG
+
+#ifdef SPEEDSTEP_DEBUG
+#define dprintk(msg...) printk(msg)
+#else
+#define dprintk(msg...) do { } while(0)
+#endif
/**
* speedstep_smi_ownership
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);
-
__asm__ __volatile__(
"out %%al, (%%dx)\n"
: "=D" (result)
: "a" (command), "b" (function), "c" (0), "d" (smi_port), "D" (0), "S" (magic)
);
- dprintk("result is %x\n", result);
-
return result;
}
*/
static int speedstep_smi_get_freqs (unsigned int *low, unsigned int *high)
{
- u32 command, result = 0, edi, high_mhz, low_mhz;
+ u32 command, result, edi, high_mhz, low_mhz;
u32 state=0;
u32 function = GET_SPEEDSTEP_FREQS;
- if (!(ist_info.event & 0xFFFF)) {
- dprintk("bug #1422 -- can't read freqs from BIOS\n", result);
+ if (!(ist_info.event & 0xFFFF))
return -ENODEV;
- }
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
- dprintk("trying to determine frequencies with command %x at port %x\n", command, smi_port);
-
__asm__ __volatile__("movl $0, %%edi\n"
"out %%al, (%%dx)\n"
: "=a" (result), "=b" (high_mhz), "=c" (low_mhz), "=d" (state), "=D" (edi)
: "a" (command), "b" (function), "c" (state), "d" (smi_port), "S" (0)
);
- 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)
return -EINVAL;
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
- dprintk("trying to determine current setting with command %x at port %x\n", command, smi_port);
-
__asm__ __volatile__("movl $0, %%edi\n"
"out %%al, (%%dx)\n"
: "=a" (result), "=b" (state), "=D" (edi)
: "a" (command), "b" (function), "c" (0), "d" (smi_port), "S" (0)
);
- dprintk("state is %x, result is %x\n", state, result);
-
return (state & 1);
}
-
/**
* speedstep_set_state - set the SpeedStep state
* @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
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);
-
do {
if (retry) {
- dprintk("retry %u, previous result %u, waiting...\n", retry, result);
+ dprintk(KERN_INFO "cpufreq: retry %u, previous result %u\n", retry, result);
mdelay(retry * 50);
}
retry++;
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);
+ dprintk(KERN_INFO "cpufreq: 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 failed with new_state %u and result %u\n", new_state, result);
}
result = speedstep_smi_ownership();
if (result) {
- dprintk("fails in aquiring ownership of a SMI interface.\n");
+ dprintk(KERN_INFO "cpufreq: fails an aquiring ownership of a SMI interface.\n");
return -EINVAL;
}
&speedstep_freqs[SPEEDSTEP_HIGH].frequency);
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");
+ dprintk(KERN_INFO PFX "could not detect low and high frequencies by SMI call.\n");
+ if (!speedstep_processor)
+ speedstep_processor = speedstep_detect_processor();
+
+ if (!speedstep_processor)
+ return -ENODEV;
+
result = speedstep_get_freqs(speedstep_processor,
&speedstep_freqs[SPEEDSTEP_LOW].frequency,
&speedstep_freqs[SPEEDSTEP_HIGH].frequency,
&speedstep_set_state);
if (result) {
- dprintk("could not detect two different speeds -- aborting.\n");
+ dprintk(KERN_INFO PFX "could not detect two different speeds -- aborting.\n");
return result;
} else
- dprintk("workaround worked.\n");
+ dprintk(KERN_INFO PFX "workaround worked.\n");
}
/* get current speed setting */
state = speedstep_get_state();
speed = speedstep_freqs[state].frequency;
- dprintk("currently at %s speed setting - %i MHz\n",
+ dprintk(KERN_INFO "cpufreq: currently at %s speed setting - %i MHz\n",
(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
(speed / 1000));
{
if (cpu)
return -ENODEV;
+ if (!speedstep_processor)
+ speedstep_processor = speedstep_detect_processor();
+ if (!speedstep_processor)
+ return 0;
return speedstep_get_processor_frequency(speedstep_processor);
}
int result = speedstep_smi_ownership();
if (result)
- dprintk("fails in re-aquiring ownership of a SMI interface.\n");
+ dprintk(KERN_INFO "cpufreq: fails an aquiring ownership of a SMI interface.\n");
return result;
}
*/
static int __init speedstep_init(void)
{
- speedstep_processor = speedstep_detect_processor();
-
- switch (speedstep_processor) {
- case SPEEDSTEP_PROCESSOR_PIII_T:
- case SPEEDSTEP_PROCESSOR_PIII_C:
- case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
- break;
- default:
- speedstep_processor = 0;
- }
+ struct cpuinfo_x86 *c = cpu_data;
- if (!speedstep_processor) {
- dprintk ("No supported Intel CPU detected.\n");
+ if (c->x86_vendor != X86_VENDOR_INTEL) {
+ printk (KERN_INFO PFX "No Intel CPU detected.\n");
return -ENODEV;
}
- dprintk("signature:0x%.8lx, command:0x%.8lx, event:0x%.8lx, perf_level:0x%.8lx.\n",
+ dprintk(KERN_DEBUG PFX "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);
git://git.onelab.eu / linux-2.6.git / blobdiff