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
16const 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 */
56const 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
79struct cpuinfo cpuinfo;
80static struct device_node *cpu;
81
82void __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
114void __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