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Marek Vasute8de0fa2011-11-26 08:11:32 +01001/*
2 * PXA CPU information display
3 *
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02006 * SPDX-License-Identifier: GPL-2.0+
Marek Vasute8de0fa2011-11-26 08:11:32 +01007 */
8
9#include <common.h>
10#include <asm/io.h>
11#include <errno.h>
12#include <linux/compiler.h>
13
Albert ARIBAUD23ff29b2014-04-15 16:13:49 +020014#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
Lukasz Dalek539e9ff2012-10-03 00:51:06 +020020#define CPU_MASK_PXA_PRODID 0x000003f0
21#define CPU_MASK_PXA_REVID 0x0000000f
Marek Vasute8de0fa2011-11-26 08:11:32 +010022
Lukasz Dalek539e9ff2012-10-03 00:51:06 +020023#define CPU_MASK_PRODREV (CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID)
24
Marek Vasute8de0fa2011-11-26 08:11:32 +010025#define CPU_VALUE_PXA25X 0x100
26#define CPU_VALUE_PXA27X 0x110
27
28static 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
35int 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
42int 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
Marcel Ziswiler901f79e2015-03-04 14:57:31 +010049int 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
Lukasz Dalek539e9ff2012-10-03 00:51:06 +020056uint32_t pxa_get_cpu_revision(void)
57{
58 return pxa_get_cpuid() & CPU_MASK_PRODREV;
59}
60
Marek Vasute8de0fa2011-11-26 08:11:32 +010061#ifdef CONFIG_DISPLAY_CPUINFO
62static 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
90static 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
Marcel Ziswiler901f79e2015-03-04 14:57:31 +0100101 if ((id == 5) || (id == 6) || (id > 8))
Marek Vasute8de0fa2011-11-26 08:11:32 +0100102 return unknown;
103
104 /* Cap the special PXA270 C5 case. */
105 if (id == 7)
106 id = 5;
107
Marcel Ziswiler901f79e2015-03-04 14:57:31 +0100108 /* Cap the special PXA270M A1 case. */
109 if (id == 8)
110 id = 1;
111
Marek Vasute8de0fa2011-11-26 08:11:32 +0100112 return rev[id];
113}
114
115static 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()) {
Marcel Ziswiler901f79e2015-03-04 14:57:31 +0100121 puts("Marvell PXA27x");
122 if (cpu_is_pxa27xm()) puts("M");
123 puts(" rev. ");
Marek Vasute8de0fa2011-11-26 08:11:32 +0100124 puts(pxa27x_get_revision());
125 } else
126 return -EINVAL;
127
128 puts("\n");
129
130 return 0;
131}
132
133int 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