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5655108a CN |
1 | /* |
2 | * sys_info.c | |
3 | * | |
4 | * System information functions | |
5 | * | |
6 | * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ | |
7 | * | |
8 | * Derived from Beagle Board and 3430 SDP code by | |
9 | * Richard Woodruff <r-woodruff2@ti.com> | |
10 | * Syed Mohammed Khasim <khasim@ti.com> | |
11 | * | |
1a459660 | 12 | * SPDX-License-Identifier: GPL-2.0+ |
5655108a CN |
13 | */ |
14 | ||
15 | #include <common.h> | |
16 | #include <asm/io.h> | |
17 | #include <asm/arch/sys_proto.h> | |
18 | #include <asm/arch/cpu.h> | |
19 | #include <asm/arch/clock.h> | |
9721027a | 20 | #include <power/tps65910.h> |
52d84869 | 21 | #include <linux/compiler.h> |
5655108a CN |
22 | |
23 | struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE; | |
24 | ||
25 | /** | |
26 | * get_cpu_rev(void) - extract rev info | |
27 | */ | |
28 | u32 get_cpu_rev(void) | |
29 | { | |
30 | u32 id; | |
31 | u32 rev; | |
32 | ||
33 | id = readl(DEVICE_ID); | |
34 | rev = (id >> 28) & 0xff; | |
35 | ||
36 | return rev; | |
37 | } | |
38 | ||
39 | /** | |
40 | * get_cpu_type(void) - extract cpu info | |
41 | */ | |
42 | u32 get_cpu_type(void) | |
43 | { | |
44 | u32 id = 0; | |
45 | u32 partnum; | |
46 | ||
47 | id = readl(DEVICE_ID); | |
48 | partnum = (id >> 12) & 0xffff; | |
49 | ||
50 | return partnum; | |
51 | } | |
52 | ||
5655108a CN |
53 | /** |
54 | * get_device_type(): tell if GP/HS/EMU/TST | |
55 | */ | |
56 | u32 get_device_type(void) | |
57 | { | |
58 | int mode; | |
59 | mode = readl(&cstat->statusreg) & (DEVICE_MASK); | |
60 | return mode >>= 8; | |
61 | } | |
62 | ||
63 | /** | |
64 | * get_sysboot_value(void) - return SYS_BOOT[4:0] | |
65 | */ | |
66 | u32 get_sysboot_value(void) | |
67 | { | |
63a7578e | 68 | return readl(&cstat->statusreg) & SYSBOOT_MASK; |
5655108a CN |
69 | } |
70 | ||
71 | #ifdef CONFIG_DISPLAY_CPUINFO | |
21254713 SA |
72 | static char *cpu_revs[] = { |
73 | "1.0", | |
74 | "2.0", | |
75 | "2.1"}; | |
76 | ||
77 | ||
78 | static char *dev_types[] = { | |
79 | "TST", | |
80 | "EMU", | |
81 | "HS", | |
82 | "GP"}; | |
83 | ||
5655108a CN |
84 | /** |
85 | * Print CPU information | |
86 | */ | |
87 | int print_cpuinfo(void) | |
88 | { | |
21254713 | 89 | char *cpu_s, *sec_s, *rev_s; |
5655108a CN |
90 | |
91 | switch (get_cpu_type()) { | |
92 | case AM335X: | |
93 | cpu_s = "AM335X"; | |
94 | break; | |
8b029f22 MP |
95 | case TI81XX: |
96 | cpu_s = "TI81XX"; | |
97 | break; | |
1f957708 LV |
98 | case AM437X: |
99 | cpu_s = "AM437X"; | |
100 | break; | |
5655108a | 101 | default: |
21254713 | 102 | cpu_s = "Unknown CPU type"; |
5655108a CN |
103 | break; |
104 | } | |
105 | ||
21254713 SA |
106 | if (get_cpu_rev() < ARRAY_SIZE(cpu_revs)) |
107 | rev_s = cpu_revs[get_cpu_rev()]; | |
108 | else | |
109 | rev_s = "?"; | |
110 | ||
111 | if (get_device_type() < ARRAY_SIZE(dev_types)) | |
112 | sec_s = dev_types[get_device_type()]; | |
113 | else | |
5655108a | 114 | sec_s = "?"; |
5655108a | 115 | |
1f957708 | 116 | printf("CPU : %s-%s rev %s\n", cpu_s, sec_s, rev_s); |
5655108a CN |
117 | |
118 | return 0; | |
119 | } | |
120 | #endif /* CONFIG_DISPLAY_CPUINFO */ | |
9721027a TR |
121 | |
122 | #ifdef CONFIG_AM33XX | |
123 | int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev) | |
124 | { | |
125 | int sil_rev; | |
126 | ||
127 | sil_rev = readl(&cdev->deviceid) >> 28; | |
128 | ||
129 | if (sil_rev == 1) | |
130 | /* PG 2.0, efuse may not be set. */ | |
131 | return MPUPLL_M_800; | |
132 | else if (sil_rev >= 2) { | |
133 | /* Check what the efuse says our max speed is. */ | |
134 | int efuse_arm_mpu_max_freq; | |
135 | efuse_arm_mpu_max_freq = readl(&cdev->efuse_sma); | |
136 | switch ((efuse_arm_mpu_max_freq & DEVICE_ID_MASK)) { | |
137 | case AM335X_ZCZ_1000: | |
138 | return MPUPLL_M_1000; | |
139 | case AM335X_ZCZ_800: | |
140 | return MPUPLL_M_800; | |
141 | case AM335X_ZCZ_720: | |
142 | return MPUPLL_M_720; | |
143 | case AM335X_ZCZ_600: | |
144 | case AM335X_ZCE_600: | |
145 | return MPUPLL_M_600; | |
146 | case AM335X_ZCZ_300: | |
147 | case AM335X_ZCE_300: | |
148 | return MPUPLL_M_300; | |
149 | } | |
150 | } | |
151 | ||
152 | /* PG 1.0 or otherwise unknown, use the PG1.0 max */ | |
153 | return MPUPLL_M_720; | |
154 | } | |
155 | ||
156 | int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency) | |
157 | { | |
158 | /* For PG2.1 and later, we have one set of values. */ | |
159 | if (sil_rev >= 2) { | |
160 | switch (frequency) { | |
161 | case MPUPLL_M_1000: | |
162 | return TPS65910_OP_REG_SEL_1_3_2_5; | |
163 | case MPUPLL_M_800: | |
164 | return TPS65910_OP_REG_SEL_1_2_6; | |
165 | case MPUPLL_M_720: | |
166 | return TPS65910_OP_REG_SEL_1_2_0; | |
167 | case MPUPLL_M_600: | |
168 | case MPUPLL_M_300: | |
169 | return TPS65910_OP_REG_SEL_1_1_3; | |
170 | } | |
171 | } | |
172 | ||
173 | /* Default to PG1.0/PG2.0 values. */ | |
174 | return TPS65910_OP_REG_SEL_1_1_3; | |
175 | } | |
176 | #endif |