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Commit | Line | Data |
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e8de0fa8 MV |
1 | /* |
2 | * PXA CPU information display | |
3 | * | |
4 | * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> | |
5 | * | |
1a459660 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
e8de0fa8 MV |
7 | */ |
8 | ||
9 | #include <common.h> | |
10 | #include <asm/io.h> | |
11 | #include <errno.h> | |
12 | #include <linux/compiler.h> | |
13 | ||
23ff29bc AA |
14 | #ifdef CONFIG_CPU_PXA25X |
15 | #if ((CONFIG_SYS_INIT_SP_ADDR) != 0xfffff800) | |
16 | #error "Init SP address must be set to 0xfffff800 for PXA250" | |
17 | #endif | |
18 | #endif | |
19 | ||
539e9ffd LD |
20 | #define CPU_MASK_PXA_PRODID 0x000003f0 |
21 | #define CPU_MASK_PXA_REVID 0x0000000f | |
22 | ||
23 | #define CPU_MASK_PRODREV (CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID) | |
e8de0fa8 | 24 | |
e8de0fa8 MV |
25 | #define CPU_VALUE_PXA25X 0x100 |
26 | #define CPU_VALUE_PXA27X 0x110 | |
27 | ||
28 | static uint32_t pxa_get_cpuid(void) | |
29 | { | |
30 | uint32_t cpuid; | |
31 | asm volatile("mrc p15, 0, %0, c0, c0, 0" : "=r"(cpuid)); | |
32 | return cpuid; | |
33 | } | |
34 | ||
35 | int cpu_is_pxa25x(void) | |
36 | { | |
37 | uint32_t id = pxa_get_cpuid(); | |
38 | id &= CPU_MASK_PXA_PRODID; | |
39 | return id == CPU_VALUE_PXA25X; | |
40 | } | |
41 | ||
42 | int cpu_is_pxa27x(void) | |
43 | { | |
44 | uint32_t id = pxa_get_cpuid(); | |
45 | id &= CPU_MASK_PXA_PRODID; | |
46 | return id == CPU_VALUE_PXA27X; | |
47 | } | |
48 | ||
901f79e4 MZ |
49 | int cpu_is_pxa27xm(void) |
50 | { | |
51 | uint32_t id = pxa_get_cpuid(); | |
52 | return ((id & CPU_MASK_PXA_PRODID) == CPU_VALUE_PXA27X) && | |
53 | ((id & CPU_MASK_PXA_REVID) == 8); | |
54 | } | |
55 | ||
539e9ffd LD |
56 | uint32_t pxa_get_cpu_revision(void) |
57 | { | |
58 | return pxa_get_cpuid() & CPU_MASK_PRODREV; | |
59 | } | |
60 | ||
e8de0fa8 MV |
61 | #ifdef CONFIG_DISPLAY_CPUINFO |
62 | static const char *pxa25x_get_revision(void) | |
63 | { | |
64 | static __maybe_unused const char * const revs_25x[] = { "A0" }; | |
65 | static __maybe_unused const char * const revs_26x[] = { | |
66 | "A0", "B0", "B1" | |
67 | }; | |
68 | static const char *unknown = "Unknown"; | |
69 | uint32_t id; | |
70 | ||
71 | if (!cpu_is_pxa25x()) | |
72 | return unknown; | |
73 | ||
74 | id = pxa_get_cpuid() & CPU_MASK_PXA_REVID; | |
75 | ||
76 | /* PXA26x is a sick special case as it can't be told apart from PXA25x :-( */ | |
77 | #ifdef CONFIG_CPU_PXA26X | |
78 | switch (id) { | |
79 | case 3: return revs_26x[0]; | |
80 | case 5: return revs_26x[1]; | |
81 | case 6: return revs_26x[2]; | |
82 | } | |
83 | #else | |
84 | if (id == 6) | |
85 | return revs_25x[0]; | |
86 | #endif | |
87 | return unknown; | |
88 | } | |
89 | ||
90 | static const char *pxa27x_get_revision(void) | |
91 | { | |
92 | static const char *const rev[] = { "A0", "A1", "B0", "B1", "C0", "C5" }; | |
93 | static const char *unknown = "Unknown"; | |
94 | uint32_t id; | |
95 | ||
96 | if (!cpu_is_pxa27x()) | |
97 | return unknown; | |
98 | ||
99 | id = pxa_get_cpuid() & CPU_MASK_PXA_REVID; | |
100 | ||
901f79e4 | 101 | if ((id == 5) || (id == 6) || (id > 8)) |
e8de0fa8 MV |
102 | return unknown; |
103 | ||
104 | /* Cap the special PXA270 C5 case. */ | |
105 | if (id == 7) | |
106 | id = 5; | |
107 | ||
901f79e4 MZ |
108 | /* Cap the special PXA270M A1 case. */ |
109 | if (id == 8) | |
110 | id = 1; | |
111 | ||
e8de0fa8 MV |
112 | return rev[id]; |
113 | } | |
114 | ||
115 | static int print_cpuinfo_pxa2xx(void) | |
116 | { | |
117 | if (cpu_is_pxa25x()) { | |
118 | puts("Marvell PXA25x rev. "); | |
119 | puts(pxa25x_get_revision()); | |
120 | } else if (cpu_is_pxa27x()) { | |
901f79e4 MZ |
121 | puts("Marvell PXA27x"); |
122 | if (cpu_is_pxa27xm()) puts("M"); | |
123 | puts(" rev. "); | |
e8de0fa8 MV |
124 | puts(pxa27x_get_revision()); |
125 | } else | |
126 | return -EINVAL; | |
127 | ||
128 | puts("\n"); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | int print_cpuinfo(void) | |
134 | { | |
135 | int ret; | |
136 | ||
137 | puts("CPU: "); | |
138 | ||
139 | ret = print_cpuinfo_pxa2xx(); | |
140 | if (!ret) | |
141 | return ret; | |
142 | ||
143 | return ret; | |
144 | } | |
145 | #endif |