Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6
[linux-2.6] / arch / powerpc / platforms / pseries / firmware.c
1 /*
2  *  pSeries firmware setup code.
3  *
4  *  Portions from arch/powerpc/platforms/pseries/setup.c:
5  *   Copyright (C) 1995  Linus Torvalds
6  *   Adapted from 'alpha' version by Gary Thomas
7  *   Modified by Cort Dougan (cort@cs.nmt.edu)
8  *   Modified by PPC64 Team, IBM Corp
9  *
10  *  Portions from arch/powerpc/kernel/firmware.c
11  *   Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
12  *   Modifications for ppc64:
13  *    Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
14  *    Copyright (C) 2005 Stephen Rothwell, IBM Corporation
15  *
16  *  Copyright 2006 IBM Corporation.
17  *
18  * This program is free software; you can redistribute it and/or
19  * modify it under the terms of the GNU General Public License
20  * as published by the Free Software Foundation; either version
21  * 2 of the License, or (at your option) any later version.
22  */
23
24 #undef DEBUG
25
26 #include <asm/firmware.h>
27 #include <asm/prom.h>
28
29 #ifdef DEBUG
30 #define DBG(fmt...) udbg_printf(fmt)
31 #else
32 #define DBG(fmt...)
33 #endif
34
35 typedef struct {
36     unsigned long val;
37     char * name;
38 } firmware_feature_t;
39
40 static __initdata firmware_feature_t
41 firmware_features_table[FIRMWARE_MAX_FEATURES] = {
42         {FW_FEATURE_PFT,                "hcall-pft"},
43         {FW_FEATURE_TCE,                "hcall-tce"},
44         {FW_FEATURE_SPRG0,              "hcall-sprg0"},
45         {FW_FEATURE_DABR,               "hcall-dabr"},
46         {FW_FEATURE_COPY,               "hcall-copy"},
47         {FW_FEATURE_ASR,                "hcall-asr"},
48         {FW_FEATURE_DEBUG,              "hcall-debug"},
49         {FW_FEATURE_PERF,               "hcall-perf"},
50         {FW_FEATURE_DUMP,               "hcall-dump"},
51         {FW_FEATURE_INTERRUPT,          "hcall-interrupt"},
52         {FW_FEATURE_MIGRATE,            "hcall-migrate"},
53         {FW_FEATURE_PERFMON,            "hcall-perfmon"},
54         {FW_FEATURE_CRQ,                "hcall-crq"},
55         {FW_FEATURE_VIO,                "hcall-vio"},
56         {FW_FEATURE_RDMA,               "hcall-rdma"},
57         {FW_FEATURE_LLAN,               "hcall-lLAN"},
58         {FW_FEATURE_BULK,               "hcall-bulk"},
59         {FW_FEATURE_XDABR,              "hcall-xdabr"},
60         {FW_FEATURE_MULTITCE,           "hcall-multi-tce"},
61         {FW_FEATURE_SPLPAR,             "hcall-splpar"},
62         {FW_FEATURE_BULK_REMOVE,        "hcall-bulk"},
63 };
64
65 /* Build up the firmware features bitmask using the contents of
66  * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
67  * be moved into prom.c prom_init().
68  */
69 void __init fw_feature_init(void)
70 {
71         struct device_node *dn;
72         const char *hypertas, *s;
73         int len, i;
74
75         DBG(" -> fw_feature_init()\n");
76
77         dn = of_find_node_by_path("/rtas");
78         if (dn == NULL) {
79                 printk(KERN_ERR "WARNING! Cannot find RTAS in device-tree!\n");
80                 goto out;
81         }
82
83         hypertas = of_get_property(dn, "ibm,hypertas-functions", &len);
84         if (hypertas == NULL)
85                 goto out;
86
87         for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
88                 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
89                         /* check value against table of strings */
90                         if (!firmware_features_table[i].name ||
91                             strcmp(firmware_features_table[i].name, s))
92                                 continue;
93
94                         /* we have a match */
95                         powerpc_firmware_features |=
96                                 firmware_features_table[i].val;
97                         break;
98                 }
99         }
100
101 out:
102         of_node_put(dn);
103         DBG(" <- fw_feature_init()\n");
104 }