1 /*
2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3  * Copyright (C) 2007-2009 PetaLogix
4  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License. See the file "COPYING" in the main directory of this archive
8  * for more details.
9  */
10 
11 #include <linux/clk.h>
12 #include <linux/init.h>
13 #include <asm/cpuinfo.h>
14 #include <asm/pvr.h>
15 
16 const struct cpu_ver_key cpu_ver_lookup[] = {
17 	/* These key value are as per MBV field in PVR0 */
18 	{"5.00.a", 0x01},
19 	{"5.00.b", 0x02},
20 	{"5.00.c", 0x03},
21 	{"6.00.a", 0x04},
22 	{"6.00.b", 0x06},
23 	{"7.00.a", 0x05},
24 	{"7.00.b", 0x07},
25 	{"7.10.a", 0x08},
26 	{"7.10.b", 0x09},
27 	{"7.10.c", 0x0a},
28 	{"7.10.d", 0x0b},
29 	{"7.20.a", 0x0c},
30 	{"7.20.b", 0x0d},
31 	{"7.20.c", 0x0e},
32 	{"7.20.d", 0x0f},
33 	{"7.30.a", 0x10},
34 	{"7.30.b", 0x11},
35 	{"8.00.a", 0x12},
36 	{"8.00.b", 0x13},
37 	{"8.10.a", 0x14},
38 	{"8.20.a", 0x15},
39 	{"8.20.b", 0x16},
40 	{"8.30.a", 0x17},
41 	{"8.40.a", 0x18},
42 	{"8.40.b", 0x19},
43 	{"8.50.a", 0x1a},
44 	{"8.50.b", 0x1c},
45 	{"8.50.c", 0x1e},
46 	{"9.0", 0x1b},
47 	{"9.1", 0x1d},
48 	{"9.2", 0x1f},
49 	{"9.3", 0x20},
50 	{NULL, 0},
51 };
52 
53 /*
54  * FIXME Not sure if the actual key is defined by Xilinx in the PVR
55  */
56 const struct family_string_key family_string_lookup[] = {
57 	{"virtex2", 0x4},
58 	{"virtex2pro", 0x5},
59 	{"spartan3", 0x6},
60 	{"virtex4", 0x7},
61 	{"virtex5", 0x8},
62 	{"spartan3e", 0x9},
63 	{"spartan3a", 0xa},
64 	{"spartan3an", 0xb},
65 	{"spartan3adsp", 0xc},
66 	{"spartan6", 0xd},
67 	{"virtex6", 0xe},
68 	{"virtex7", 0xf},
69 	/* FIXME There is no key code defined for spartan2 */
70 	{"spartan2", 0xf0},
71 	{"kintex7", 0x10},
72 	{"artix7", 0x11},
73 	{"zynq7000", 0x12},
74 	{"UltraScale Virtex", 0x13},
75 	{"UltraScale Kintex", 0x14},
76 	{NULL, 0},
77 };
78 
79 struct cpuinfo cpuinfo;
80 static struct device_node *cpu;
81 
82 void __init setup_cpuinfo(void)
83 {
84 	cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
85 	if (!cpu)
86 		pr_err("You don't have cpu!!!\n");
87 
88 	pr_info("%s: initialising\n", __func__);
89 
90 	switch (cpu_has_pvr()) {
91 	case 0:
92 		pr_warn("%s: No PVR support. Using static CPU info from FDT\n",
93 			__func__);
94 		set_cpuinfo_static(&cpuinfo, cpu);
95 		break;
96 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
97  * please do not use FULL PVR with MMU */
98 	case 1:
99 		pr_info("%s: Using full CPU PVR support\n",
100 			__func__);
101 		set_cpuinfo_static(&cpuinfo, cpu);
102 		set_cpuinfo_pvr_full(&cpuinfo, cpu);
103 		break;
104 	default:
105 		pr_warn("%s: Unsupported PVR setting\n", __func__);
106 		set_cpuinfo_static(&cpuinfo, cpu);
107 	}
108 
109 	if (cpuinfo.mmu_privins)
110 		pr_warn("%s: Stream instructions enabled"
111 			" - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
112 }
113 
114 void __init setup_cpuinfo_clk(void)
115 {
116 	struct clk *clk;
117 
118 	clk = of_clk_get(cpu, 0);
119 	if (IS_ERR(clk)) {
120 		pr_err("ERROR: CPU CCF input clock not found\n");
121 		/* take timebase-frequency from DTS */
122 		cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
123 	} else {
124 		cpuinfo.cpu_clock_freq = clk_get_rate(clk);
125 	}
126 
127 	if (!cpuinfo.cpu_clock_freq) {
128 		pr_err("ERROR: CPU clock frequency not setup\n");
129 		BUG();
130 	}
131 }
132