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Rabin Vincentabf12d72010-12-08 11:07:59 +05301/*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
5 * License terms: GNU General Public License (GPL) version 2
6 */
7
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/io.h>
11
12#include <asm/cputype.h>
13#include <asm/tlbflush.h>
14#include <asm/cacheflush.h>
15#include <asm/mach/map.h>
16
Arnd Bergmanne657bcf2013-03-21 22:51:12 +010017#include "setup.h"
Rabin Vincentabf12d72010-12-08 11:07:59 +053018
Linus Walleij174e7792013-03-19 15:41:55 +010019#include "db8500-regs.h"
Linus Walleij7a4f2602012-09-19 19:31:19 +020020#include "id.h"
21
Rabin Vincentabf12d72010-12-08 11:07:59 +053022struct dbx500_asic_id dbx500_id;
23
Arnd Bergmann080e0432013-05-31 22:47:04 +020024static unsigned int __init ux500_read_asicid(phys_addr_t addr)
Rabin Vincentabf12d72010-12-08 11:07:59 +053025{
26 phys_addr_t base = addr & ~0xfff;
27 struct map_desc desc = {
Arnd Bergmann080e0432013-05-31 22:47:04 +020028 .virtual = (unsigned long)UX500_VIRT_ROM,
Rabin Vincentabf12d72010-12-08 11:07:59 +053029 .pfn = __phys_to_pfn(base),
30 .length = SZ_16K,
31 .type = MT_DEVICE,
32 };
33
34 iotable_init(&desc, 1);
35
36 /* As in devicemaps_init() */
37 local_flush_tlb_all();
38 flush_cache_all();
39
Arnd Bergmann080e0432013-05-31 22:47:04 +020040 return readl(UX500_VIRT_ROM + (addr & 0xfff));
Rabin Vincentabf12d72010-12-08 11:07:59 +053041}
42
43static void ux500_print_soc_info(unsigned int asicid)
44{
45 unsigned int rev = dbx500_revision();
46
47 pr_info("DB%4x ", dbx500_partnumber());
48
49 if (rev == 0x01)
50 pr_cont("Early Drop");
51 else if (rev >= 0xA0)
52 pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf);
53 else
54 pr_cont("Unknown");
55
56 pr_cont(" [%#010x]\n", asicid);
57}
58
59static unsigned int partnumber(unsigned int asicid)
60{
61 return (asicid >> 8) & 0xffff;
62}
63
64/*
65 * SOC MIDR ASICID ADDRESS ASICID VALUE
66 * DB8500ed 0x410fc090 0x9001FFF4 0x00850001
67 * DB8500v1 0x411fc091 0x9001FFF4 0x008500A0
68 * DB8500v1.1 0x411fc091 0x9001FFF4 0x008500A1
69 * DB8500v2 0x412fc091 0x9001DBF4 0x008500B0
Rabin Vincent41c34ae2011-12-15 11:08:22 +010070 * DB8520v2.2 0x412fc091 0x9001DBF4 0x008500B2
Rabin Vincentabf12d72010-12-08 11:07:59 +053071 * DB5500v1 0x412fc091 0x9001FFF4 0x005500A0
Linus Walleijbc71c092012-01-23 11:54:44 +010072 * DB9540 0x413fc090 0xFFFFDBF4 0x009540xx
Rabin Vincentabf12d72010-12-08 11:07:59 +053073 */
74
75void __init ux500_map_io(void)
76{
77 unsigned int cpuid = read_cpuid_id();
78 unsigned int asicid = 0;
79 phys_addr_t addr = 0;
80
81 switch (cpuid) {
82 case 0x410fc090: /* DB8500ed */
83 case 0x411fc091: /* DB8500v1 */
84 addr = 0x9001FFF4;
85 break;
86
Rabin Vincent41c34ae2011-12-15 11:08:22 +010087 case 0x412fc091: /* DB8520 / DB8500v2 / DB5500v1 */
Rabin Vincentabf12d72010-12-08 11:07:59 +053088 asicid = ux500_read_asicid(0x9001DBF4);
Rabin Vincent41c34ae2011-12-15 11:08:22 +010089 if (partnumber(asicid) == 0x8500 ||
90 partnumber(asicid) == 0x8520)
Rabin Vincentabf12d72010-12-08 11:07:59 +053091 /* DB8500v2 */
92 break;
93
94 /* DB5500v1 */
95 addr = 0x9001FFF4;
96 break;
Linus Walleijbc71c092012-01-23 11:54:44 +010097
98 case 0x413fc090: /* DB9540 */
99 addr = 0xFFFFDBF4;
100 break;
Rabin Vincentabf12d72010-12-08 11:07:59 +0530101 }
102
103 if (addr)
104 asicid = ux500_read_asicid(addr);
105
106 if (!asicid) {
107 pr_err("Unable to identify SoC\n");
108 ux500_unknown_soc();
109 }
110
111 dbx500_id.process = asicid >> 24;
112 dbx500_id.partnumber = partnumber(asicid);
113 dbx500_id.revision = asicid & 0xff;
114
115 ux500_print_soc_info(asicid);
116}