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 	{"9.0", 0x1b},
45 	{"9.1", 0x1d},
46 	{NULL, 0},
47 };
48 
49 /*
50  * FIXME Not sure if the actual key is defined by Xilinx in the PVR
51  */
52 const struct family_string_key family_string_lookup[] = {
53 	{"virtex2", 0x4},
54 	{"virtex2pro", 0x5},
55 	{"spartan3", 0x6},
56 	{"virtex4", 0x7},
57 	{"virtex5", 0x8},
58 	{"spartan3e", 0x9},
59 	{"spartan3a", 0xa},
60 	{"spartan3an", 0xb},
61 	{"spartan3adsp", 0xc},
62 	{"spartan6", 0xd},
63 	{"virtex6", 0xe},
64 	/* FIXME There is no key code defined for spartan2 */
65 	{"spartan2", 0xf0},
66 	{"kintex7", 0x10},
67 	{"artix7", 0x11},
68 	{"zynq7000", 0x12},
69 	{NULL, 0},
70 };
71 
72 struct cpuinfo cpuinfo;
73 static struct device_node *cpu;
74 
75 void __init setup_cpuinfo(void)
76 {
77 	cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
78 	if (!cpu)
79 		pr_err("You don't have cpu!!!\n");
80 
81 	pr_info("%s: initialising\n", __func__);
82 
83 	switch (cpu_has_pvr()) {
84 	case 0:
85 		pr_warn("%s: No PVR support. Using static CPU info from FDT\n",
86 			__func__);
87 		set_cpuinfo_static(&cpuinfo, cpu);
88 		break;
89 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
90  * please do not use FULL PVR with MMU */
91 	case 1:
92 		pr_info("%s: Using full CPU PVR support\n",
93 			__func__);
94 		set_cpuinfo_static(&cpuinfo, cpu);
95 		set_cpuinfo_pvr_full(&cpuinfo, cpu);
96 		break;
97 	default:
98 		pr_warn("%s: Unsupported PVR setting\n", __func__);
99 		set_cpuinfo_static(&cpuinfo, cpu);
100 	}
101 
102 	if (cpuinfo.mmu_privins)
103 		pr_warn("%s: Stream instructions enabled"
104 			" - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
105 }
106 
107 void __init setup_cpuinfo_clk(void)
108 {
109 	struct clk *clk;
110 
111 	clk = of_clk_get(cpu, 0);
112 	if (IS_ERR(clk)) {
113 		pr_err("ERROR: CPU CCF input clock not found\n");
114 		/* take timebase-frequency from DTS */
115 		cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
116 	} else {
117 		cpuinfo.cpu_clock_freq = clk_get_rate(clk);
118 	}
119 
120 	if (!cpuinfo.cpu_clock_freq) {
121 		pr_err("ERROR: CPU clock frequency not setup\n");
122 		BUG();
123 	}
124 }
125