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 	{"9.4", 0x21},
51 	{"9.5", 0x22},
52 	{NULL, 0},
53 };
54 
55 /*
56  * FIXME Not sure if the actual key is defined by Xilinx in the PVR
57  */
58 const struct family_string_key family_string_lookup[] = {
59 	{"virtex2", 0x4},
60 	{"virtex2pro", 0x5},
61 	{"spartan3", 0x6},
62 	{"virtex4", 0x7},
63 	{"virtex5", 0x8},
64 	{"spartan3e", 0x9},
65 	{"spartan3a", 0xa},
66 	{"spartan3an", 0xb},
67 	{"spartan3adsp", 0xc},
68 	{"spartan6", 0xd},
69 	{"virtex6", 0xe},
70 	{"virtex7", 0xf},
71 	/* FIXME There is no key code defined for spartan2 */
72 	{"spartan2", 0xf0},
73 	{"kintex7", 0x10},
74 	{"artix7", 0x11},
75 	{"zynq7000", 0x12},
76 	{"UltraScale Virtex", 0x13},
77 	{"UltraScale Kintex", 0x14},
78 	{NULL, 0},
79 };
80 
81 struct cpuinfo cpuinfo;
82 static struct device_node *cpu;
83 
84 void __init setup_cpuinfo(void)
85 {
86 	cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
87 	if (!cpu)
88 		pr_err("You don't have cpu!!!\n");
89 
90 	pr_info("%s: initialising\n", __func__);
91 
92 	switch (cpu_has_pvr()) {
93 	case 0:
94 		pr_warn("%s: No PVR support. Using static CPU info from FDT\n",
95 			__func__);
96 		set_cpuinfo_static(&cpuinfo, cpu);
97 		break;
98 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
99  * please do not use FULL PVR with MMU */
100 	case 1:
101 		pr_info("%s: Using full CPU PVR support\n",
102 			__func__);
103 		set_cpuinfo_static(&cpuinfo, cpu);
104 		set_cpuinfo_pvr_full(&cpuinfo, cpu);
105 		break;
106 	default:
107 		pr_warn("%s: Unsupported PVR setting\n", __func__);
108 		set_cpuinfo_static(&cpuinfo, cpu);
109 	}
110 
111 	if (cpuinfo.mmu_privins)
112 		pr_warn("%s: Stream instructions enabled"
113 			" - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
114 }
115 
116 void __init setup_cpuinfo_clk(void)
117 {
118 	struct clk *clk;
119 
120 	clk = of_clk_get(cpu, 0);
121 	if (IS_ERR(clk)) {
122 		pr_err("ERROR: CPU CCF input clock not found\n");
123 		/* take timebase-frequency from DTS */
124 		cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
125 	} else {
126 		cpuinfo.cpu_clock_freq = clk_get_rate(clk);
127 	}
128 
129 	if (!cpuinfo.cpu_clock_freq) {
130 		pr_err("ERROR: CPU clock frequency not setup\n");
131 		BUG();
132 	}
133 }
134