[PATCH] hwmon: hwmon vs i2c, second round (07/11)

[linux-2.6-omap-h63xx.git] / drivers / hwmon / hwmon-vid.c

diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c
new file mode 100644 (file)
index 0000000..ce475c9
--- /dev/null
+++ b/drivers/hwmon/hwmon-vid.c
@@ -0,0 +1,103 @@
+/*
+    hwmon-vid.c - VID/VRM/VRD voltage conversions
+
+    Copyright (c) 2004 Rudolf Marek <r.marek@sh.cvut.cz>
+
+    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 of the License, 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/hwmon-vid.h>
+
+struct vrm_model {
+       u8 vendor;
+       u8 eff_family;
+       u8 eff_model;
+       int vrm_type;
+};
+
+#define ANY 0xFF
+
+#ifdef CONFIG_X86
+
+static struct vrm_model vrm_models[] = {
+       {X86_VENDOR_AMD, 0x6, ANY, 90},         /* Athlon Duron etc */
+       {X86_VENDOR_AMD, 0xF, ANY, 24},         /* Athlon 64, Opteron */
+       {X86_VENDOR_INTEL, 0x6, 0x9, 85},       /* 0.13um too */
+       {X86_VENDOR_INTEL, 0x6, 0xB, 85},       /* 0xB Tualatin */
+       {X86_VENDOR_INTEL, 0x6, ANY, 82},       /* any P6 */
+       {X86_VENDOR_INTEL, 0x7, ANY, 0},        /* Itanium */
+       {X86_VENDOR_INTEL, 0xF, 0x3, 100},      /* P4 Prescott */
+       {X86_VENDOR_INTEL, 0xF, ANY, 90},       /* P4 before Prescott */
+       {X86_VENDOR_INTEL, 0x10,ANY, 0},        /* Itanium 2 */
+       {X86_VENDOR_UNKNOWN, ANY, ANY, 0}       /* stop here */
+       };
+
+static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor)
+{
+       int i = 0;
+
+       while (vrm_models[i].vendor!=X86_VENDOR_UNKNOWN) {
+               if (vrm_models[i].vendor==vendor)
+                       if ((vrm_models[i].eff_family==eff_family)&& \
+                       ((vrm_models[i].eff_model==eff_model)|| \
+                       (vrm_models[i].eff_model==ANY)))
+                               return vrm_models[i].vrm_type;
+               i++;
+       }
+
+       return 0;
+}
+
+int vid_which_vrm(void)
+{
+       struct cpuinfo_x86 *c = cpu_data;
+       u32 eax;
+       u8 eff_family, eff_model;
+       int vrm_ret;
+
+       if (c->x86 < 6) return 0;       /* any CPU with familly lower than 6
+                                       dont have VID and/or CPUID */
+       eax = cpuid_eax(1);
+       eff_family = ((eax & 0x00000F00)>>8);
+       eff_model  = ((eax & 0x000000F0)>>4);
+       if (eff_family == 0xF) {        /* use extended model & family */
+               eff_family += ((eax & 0x00F00000)>>20);
+               eff_model += ((eax & 0x000F0000)>>16)<<4;
+       }
+       vrm_ret = find_vrm(eff_family,eff_model,c->x86_vendor);
+       if (vrm_ret == 0)
+               printk(KERN_INFO "hwmon-vid: Unknown VRM version of your"
+               " x86 CPU\n");
+       return vrm_ret;
+}
+
+/* and now for something completely different for Non-x86 world*/
+#else
+int vid_which_vrm(void)
+{
+       printk(KERN_INFO "hwmon-vid: Unknown VRM version of your CPU\n");
+       return 0;
+}
+#endif
+
+EXPORT_SYMBOL(vid_which_vrm);
+
+MODULE_AUTHOR("Rudolf Marek <r.marek@sh.cvut.cz>");
+
+MODULE_DESCRIPTION("hwmon-vid driver");
+MODULE_LICENSE("GPL");