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linux
1/* OLPC machine specific definitions */
2
3#ifndef ASM_OLPC_H_
4#define ASM_OLPC_H_
5
6#include <asm/geode.h>
7
8struct olpc_platform_t {
9 int flags;
10 uint32_t boardrev;
11 int ecver;
12};
13
14#define OLPC_F_PRESENT 0x01
15#define OLPC_F_DCON 0x02
16#define OLPC_F_VSA 0x04
17
18#ifdef CONFIG_OLPC
19
20extern struct olpc_platform_t olpc_platform_info;
21
22/*
23 * OLPC board IDs contain the major build number within the mask 0x0ff0,
24 * and the minor build number withing 0x000f. Pre-builds have a minor
25 * number less than 8, and normal builds start at 8. For example, 0x0B10
26 * is a PreB1, and 0x0C18 is a C1.
27 */
28
29static inline uint32_t olpc_board(uint8_t id)
30{
31 return (id << 4) | 0x8;
32}
33
34static inline uint32_t olpc_board_pre(uint8_t id)
35{
36 return id << 4;
37}
38
39static inline int machine_is_olpc(void)
40{
41 return (olpc_platform_info.flags & OLPC_F_PRESENT) ? 1 : 0;
42}
43
44/*
45 * The DCON is OLPC's Display Controller. It has a number of unique
46 * features that we might want to take advantage of..
47 */
48static inline int olpc_has_dcon(void)
49{
50 return (olpc_platform_info.flags & OLPC_F_DCON) ? 1 : 0;
51}
52
53/*
54 * The VSA is software from AMD that typical Geode bioses will include.
55 * It is used to emulate the PCI bus, VGA, etc. OLPC's Open Firmware does
56 * not include the VSA; instead, PCI is emulated by the kernel.
57 *
58 * The VSA is described further in arch/x86/pci/olpc.c.
59 */
60static inline int olpc_has_vsa(void)
61{
62 return (olpc_platform_info.flags & OLPC_F_VSA) ? 1 : 0;
63}
64
65/*
66 * The "Mass Production" version of OLPC's XO is identified as being model
67 * C2. During the prototype phase, the following models (in chronological
68 * order) were created: A1, B1, B2, B3, B4, C1. The A1 through B2 models
69 * were based on Geode GX CPUs, and models after that were based upon
70 * Geode LX CPUs. There were also some hand-assembled models floating
71 * around, referred to as PreB1, PreB2, etc.
72 */
73static inline int olpc_board_at_least(uint32_t rev)
74{
75 return olpc_platform_info.boardrev >= rev;
76}
77
78#else
79
80static inline int machine_is_olpc(void)
81{
82 return 0;
83}
84
85static inline int olpc_has_dcon(void)
86{
87 return 0;
88}
89
90static inline int olpc_has_vsa(void)
91{
92 return 0;
93}
94
95#endif
96
97/* EC related functions */
98
99extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
100 unsigned char *outbuf, size_t outlen);
101
102extern int olpc_ec_mask_set(uint8_t bits);
103extern int olpc_ec_mask_unset(uint8_t bits);
104
105/* EC commands */
106
107#define EC_FIRMWARE_REV 0x08
108
109/* SCI source values */
110
111#define EC_SCI_SRC_EMPTY 0x00
112#define EC_SCI_SRC_GAME 0x01
113#define EC_SCI_SRC_BATTERY 0x02
114#define EC_SCI_SRC_BATSOC 0x04
115#define EC_SCI_SRC_BATERR 0x08
116#define EC_SCI_SRC_EBOOK 0x10
117#define EC_SCI_SRC_WLAN 0x20
118#define EC_SCI_SRC_ACPWR 0x40
119#define EC_SCI_SRC_ALL 0x7F
120
121/* GPIO assignments */
122
123#define OLPC_GPIO_MIC_AC geode_gpio(1)
124#define OLPC_GPIO_DCON_IRQ geode_gpio(7)
125#define OLPC_GPIO_THRM_ALRM geode_gpio(10)
126#define OLPC_GPIO_SMB_CLK geode_gpio(14)
127#define OLPC_GPIO_SMB_DATA geode_gpio(15)
128#define OLPC_GPIO_WORKAUX geode_gpio(24)
129#define OLPC_GPIO_LID geode_gpio(26)
130#define OLPC_GPIO_ECSCI geode_gpio(27)
131
132#endif