Commit | Line | Data |
---|---|---|
9c38cf44 PB |
1 | /* |
2 | * Copyright (C) 2013 Imagination Technologies | |
3 | * Author: Paul Burton <paul.burton@imgtec.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | */ | |
10 | ||
11 | #ifndef __MIPS_ASM_MIPS_CPC_H__ | |
12 | #define __MIPS_ASM_MIPS_CPC_H__ | |
13 | ||
14 | #include <linux/io.h> | |
15 | #include <linux/types.h> | |
16 | ||
17 | /* The base address of the CPC registers */ | |
18 | extern void __iomem *mips_cpc_base; | |
19 | ||
20 | /** | |
21 | * mips_cpc_default_phys_base - retrieve the default physical base address of | |
22 | * the CPC | |
23 | * | |
24 | * Returns the default physical base address of the Cluster Power Controller | |
25 | * memory mapped registers. This is platform dependant & must therefore be | |
26 | * implemented per-platform. | |
27 | */ | |
28 | extern phys_t mips_cpc_default_phys_base(void); | |
29 | ||
30 | /** | |
31 | * mips_cpc_phys_base - retrieve the physical base address of the CPC | |
32 | * | |
33 | * This function returns the physical base address of the Cluster Power | |
34 | * Controller memory mapped registers, or 0 if no Cluster Power Controller | |
35 | * is present. It may be overriden by individual platforms which determine | |
36 | * this address in a different way. | |
37 | */ | |
38 | extern phys_t __weak mips_cpc_phys_base(void); | |
39 | ||
40 | /** | |
41 | * mips_cpc_probe - probe for a Cluster Power Controller | |
42 | * | |
43 | * Attempt to detect the presence of a Cluster Power Controller. Returns 0 if | |
44 | * a CPC is successfully detected, else -errno. | |
45 | */ | |
46 | #ifdef CONFIG_MIPS_CPC | |
47 | extern int mips_cpc_probe(void); | |
48 | #else | |
49 | static inline int mips_cpc_probe(void) | |
50 | { | |
51 | return -ENODEV; | |
52 | } | |
53 | #endif | |
54 | ||
55 | /** | |
56 | * mips_cpc_present - determine whether a Cluster Power Controller is present | |
57 | * | |
58 | * Returns true if a CPC is present in the system, else false. | |
59 | */ | |
60 | static inline bool mips_cpc_present(void) | |
61 | { | |
62 | #ifdef CONFIG_MIPS_CPC | |
63 | return mips_cpc_base != NULL; | |
64 | #else | |
65 | return false; | |
66 | #endif | |
67 | } | |
68 | ||
69 | /* Offsets from the CPC base address to various control blocks */ | |
70 | #define MIPS_CPC_GCB_OFS 0x0000 | |
71 | #define MIPS_CPC_CLCB_OFS 0x2000 | |
72 | #define MIPS_CPC_COCB_OFS 0x4000 | |
73 | ||
74 | /* Macros to ease the creation of register access functions */ | |
2ba60250 PB |
75 | #define BUILD_CPC_R_(name, off) \ |
76 | static inline u32 *addr_cpc_##name(void) \ | |
77 | { \ | |
78 | return (u32 *)(mips_cpc_base + (off)); \ | |
79 | } \ | |
80 | \ | |
9c38cf44 PB |
81 | static inline u32 read_cpc_##name(void) \ |
82 | { \ | |
9a1724c7 | 83 | return __raw_readl(mips_cpc_base + (off)); \ |
9c38cf44 PB |
84 | } |
85 | ||
86 | #define BUILD_CPC__W(name, off) \ | |
87 | static inline void write_cpc_##name(u32 value) \ | |
88 | { \ | |
9a1724c7 | 89 | __raw_writel(value, mips_cpc_base + (off)); \ |
9c38cf44 PB |
90 | } |
91 | ||
92 | #define BUILD_CPC_RW(name, off) \ | |
93 | BUILD_CPC_R_(name, off) \ | |
94 | BUILD_CPC__W(name, off) | |
95 | ||
96 | #define BUILD_CPC_Cx_R_(name, off) \ | |
97 | BUILD_CPC_R_(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \ | |
98 | BUILD_CPC_R_(co_##name, MIPS_CPC_COCB_OFS + (off)) | |
99 | ||
100 | #define BUILD_CPC_Cx__W(name, off) \ | |
101 | BUILD_CPC__W(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \ | |
102 | BUILD_CPC__W(co_##name, MIPS_CPC_COCB_OFS + (off)) | |
103 | ||
104 | #define BUILD_CPC_Cx_RW(name, off) \ | |
105 | BUILD_CPC_Cx_R_(name, off) \ | |
106 | BUILD_CPC_Cx__W(name, off) | |
107 | ||
108 | /* GCB register accessor functions */ | |
109 | BUILD_CPC_RW(access, MIPS_CPC_GCB_OFS + 0x00) | |
110 | BUILD_CPC_RW(seqdel, MIPS_CPC_GCB_OFS + 0x08) | |
111 | BUILD_CPC_RW(rail, MIPS_CPC_GCB_OFS + 0x10) | |
112 | BUILD_CPC_RW(resetlen, MIPS_CPC_GCB_OFS + 0x18) | |
113 | BUILD_CPC_R_(revision, MIPS_CPC_GCB_OFS + 0x20) | |
114 | ||
115 | /* Core Local & Core Other accessor functions */ | |
116 | BUILD_CPC_Cx_RW(cmd, 0x00) | |
117 | BUILD_CPC_Cx_RW(stat_conf, 0x08) | |
118 | BUILD_CPC_Cx_RW(other, 0x10) | |
119 | ||
120 | /* CPC_Cx_CMD register fields */ | |
121 | #define CPC_Cx_CMD_SHF 0 | |
122 | #define CPC_Cx_CMD_MSK (_ULCAST_(0xf) << 0) | |
123 | #define CPC_Cx_CMD_CLOCKOFF (_ULCAST_(0x1) << 0) | |
124 | #define CPC_Cx_CMD_PWRDOWN (_ULCAST_(0x2) << 0) | |
125 | #define CPC_Cx_CMD_PWRUP (_ULCAST_(0x3) << 0) | |
126 | #define CPC_Cx_CMD_RESET (_ULCAST_(0x4) << 0) | |
127 | ||
128 | /* CPC_Cx_STAT_CONF register fields */ | |
129 | #define CPC_Cx_STAT_CONF_PWRUPE_SHF 23 | |
130 | #define CPC_Cx_STAT_CONF_PWRUPE_MSK (_ULCAST_(0x1) << 23) | |
131 | #define CPC_Cx_STAT_CONF_SEQSTATE_SHF 19 | |
132 | #define CPC_Cx_STAT_CONF_SEQSTATE_MSK (_ULCAST_(0xf) << 19) | |
133 | #define CPC_Cx_STAT_CONF_SEQSTATE_D0 (_ULCAST_(0x0) << 19) | |
134 | #define CPC_Cx_STAT_CONF_SEQSTATE_U0 (_ULCAST_(0x1) << 19) | |
135 | #define CPC_Cx_STAT_CONF_SEQSTATE_U1 (_ULCAST_(0x2) << 19) | |
136 | #define CPC_Cx_STAT_CONF_SEQSTATE_U2 (_ULCAST_(0x3) << 19) | |
137 | #define CPC_Cx_STAT_CONF_SEQSTATE_U3 (_ULCAST_(0x4) << 19) | |
138 | #define CPC_Cx_STAT_CONF_SEQSTATE_U4 (_ULCAST_(0x5) << 19) | |
139 | #define CPC_Cx_STAT_CONF_SEQSTATE_U5 (_ULCAST_(0x6) << 19) | |
140 | #define CPC_Cx_STAT_CONF_SEQSTATE_U6 (_ULCAST_(0x7) << 19) | |
141 | #define CPC_Cx_STAT_CONF_SEQSTATE_D1 (_ULCAST_(0x8) << 19) | |
142 | #define CPC_Cx_STAT_CONF_SEQSTATE_D3 (_ULCAST_(0x9) << 19) | |
143 | #define CPC_Cx_STAT_CONF_SEQSTATE_D2 (_ULCAST_(0xa) << 19) | |
144 | #define CPC_Cx_STAT_CONF_CLKGAT_IMPL_SHF 17 | |
145 | #define CPC_Cx_STAT_CONF_CLKGAT_IMPL_MSK (_ULCAST_(0x1) << 17) | |
146 | #define CPC_Cx_STAT_CONF_PWRDN_IMPL_SHF 16 | |
147 | #define CPC_Cx_STAT_CONF_PWRDN_IMPL_MSK (_ULCAST_(0x1) << 16) | |
148 | #define CPC_Cx_STAT_CONF_EJTAG_PROBE_SHF 15 | |
149 | #define CPC_Cx_STAT_CONF_EJTAG_PROBE_MSK (_ULCAST_(0x1) << 15) | |
150 | ||
151 | /* CPC_Cx_OTHER register fields */ | |
152 | #define CPC_Cx_OTHER_CORENUM_SHF 16 | |
153 | #define CPC_Cx_OTHER_CORENUM_MSK (_ULCAST_(0xff) << 16) | |
154 | ||
76ae6584 PB |
155 | #ifdef CONFIG_MIPS_CPC |
156 | ||
157 | /** | |
158 | * mips_cpc_lock_other - lock access to another core | |
159 | * core: the other core to be accessed | |
160 | * | |
161 | * Call before operating upon a core via the 'other' register region in | |
162 | * order to prevent the region being moved during access. Must be followed | |
163 | * by a call to mips_cpc_unlock_other. | |
164 | */ | |
165 | extern void mips_cpc_lock_other(unsigned int core); | |
166 | ||
167 | /** | |
168 | * mips_cpc_unlock_other - unlock access to another core | |
169 | * | |
170 | * Call after operating upon another core via the 'other' register region. | |
171 | * Must be called after mips_cpc_lock_other. | |
172 | */ | |
173 | extern void mips_cpc_unlock_other(void); | |
174 | ||
175 | #else /* !CONFIG_MIPS_CPC */ | |
176 | ||
177 | static inline void mips_cpc_lock_other(unsigned int core) { } | |
178 | static inline void mips_cpc_unlock_other(void) { } | |
179 | ||
180 | #endif /* !CONFIG_MIPS_CPC */ | |
181 | ||
9c38cf44 | 182 | #endif /* __MIPS_ASM_MIPS_CPC_H__ */ |