source: SVN/rincon/u-boot/cpu/arm926ejs/cpuinfo.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

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Signed-off-by: Tim Harvey <tharvey@…>

File size: 7.0 KB
Line 
1/*
2 * OMAP1 CPU identification code
3 *
4 * Copyright (C) 2004 Nokia Corporation
5 * Written by Tony Lindgren <tony@atomide.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <common.h>
13#include <command.h>
14#include <arm926ejs.h>
15
16#if defined(CONFIG_DISPLAY_CPUINFO) && defined(CONFIG_OMAP)
17
18#define omap_readw(x)           *(volatile unsigned short *)(x)
19#define omap_readl(x)           *(volatile unsigned long *)(x)
20
21#define OMAP_DIE_ID_0           0xfffe1800
22#define OMAP_DIE_ID_1           0xfffe1804
23#define OMAP_PRODUCTION_ID_0    0xfffe2000
24#define OMAP_PRODUCTION_ID_1    0xfffe2004
25#define OMAP32_ID_0             0xfffed400
26#define OMAP32_ID_1             0xfffed404
27
28struct omap_id {
29        u16     jtag_id;        /* Used to determine OMAP type */
30        u8      die_rev;        /* Processor revision */
31        u32     omap_id;        /* OMAP revision */
32        u32     type;           /* Cpu id bits [31:08], cpu class bits [07:00] */
33};
34
35/* Register values to detect the OMAP version */
36static struct omap_id omap_ids[] = {
37        { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
38        { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
39        { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
40        { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
41        { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
42        { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
43        { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
44        { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
45        { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
46        { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
47        { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
48        { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
49        { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
50        { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
51        { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
52        { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
53        { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
54        { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
55        { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
56};
57
58/*
59 * Get OMAP type from PROD_ID.
60 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
61 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
62 * Undocumented register in TEST BLOCK is used as fallback; This seems to
63 * work on 1510, 1610 & 1710. The official way hopefully will work in future
64 * processors.
65 */
66static u16 omap_get_jtag_id(void)
67{
68        u32 prod_id, omap_id;
69
70        prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
71        omap_id = omap_readl(OMAP32_ID_1);
72
73        /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
74        if (((prod_id >> 20) == 0) || (prod_id == omap_id))
75                prod_id = 0;
76        else
77                prod_id &= 0xffff;
78
79        if (prod_id)
80                return prod_id;
81
82        /* Use OMAP32_ID_1 as fallback */
83        prod_id = ((omap_id >> 12) & 0xffff);
84
85        return prod_id;
86}
87
88/*
89 * Get OMAP revision from DIE_REV.
90 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
91 * Undocumented register in the TEST BLOCK is used as fallback.
92 * REVISIT: This does not seem to work on 1510
93 */
94static u8 omap_get_die_rev(void)
95{
96        u32 die_rev;
97
98        die_rev = omap_readl(OMAP_DIE_ID_1);
99
100        /* Check for broken OMAP_DIE_ID on early 1710 */
101        if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
102                die_rev = 0;
103
104        die_rev = (die_rev >> 17) & 0xf;
105        if (die_rev)
106                return die_rev;
107
108        die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
109
110        return die_rev;
111}
112
113static unsigned long dpll1(void)
114{
115        unsigned short pll_ctl_val = omap_readw(DPLL_CTL_REG);
116        unsigned long rate;
117
118        rate = CONFIG_SYS_CLK_FREQ; /* Base xtal rate */
119        if (pll_ctl_val & 0x10) {
120                /* PLL enabled, apply multiplier and divisor */
121                if (pll_ctl_val & 0xf80)
122                        rate *= (pll_ctl_val & 0xf80) >> 7;
123                rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
124        } else {
125                /* PLL disabled, apply bypass divisor */
126                switch (pll_ctl_val & 0xc) {
127                case 0:
128                        break;
129                case 0x4:
130                        rate /= 2;
131                        break;
132                default:
133                        rate /= 4;
134                        break;
135                }
136        }
137
138        return rate;
139}
140
141static unsigned long armcore(void)
142{
143        unsigned short arm_ckctl = omap_readw(ARM_CKCTL);
144
145        return (dpll1() >> ((arm_ckctl & 0x0030) >> 4));
146}
147
148int print_cpuinfo (void)
149{
150        int i;
151        u16 jtag_id;
152        u8 die_rev;
153        u32 omap_id;
154        u8 cpu_type;
155        u32 system_serial_high;
156        u32 system_serial_low;
157        u32 system_rev = 0;
158
159        jtag_id = omap_get_jtag_id();
160        die_rev = omap_get_die_rev();
161        omap_id = omap_readl(OMAP32_ID_0);
162
163#ifdef DEBUG
164        printf("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
165        printf("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
166               omap_readl(OMAP_DIE_ID_1),
167               (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
168        printf("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0));
169        printf("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
170               omap_readl(OMAP_PRODUCTION_ID_1),
171               omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
172        printf("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
173        printf("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
174        printf("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
175#endif
176
177        system_serial_high = omap_readl(OMAP_DIE_ID_0);
178        system_serial_low = omap_readl(OMAP_DIE_ID_1);
179
180        /* First check only the major version in a safe way */
181        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
182                if (jtag_id == (omap_ids[i].jtag_id)) {
183                        system_rev = omap_ids[i].type;
184                        break;
185                }
186        }
187
188        /* Check if we can find the die revision */
189        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
190                if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
191                        system_rev = omap_ids[i].type;
192                        break;
193                }
194        }
195
196        /* Finally check also the omap_id */
197        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
198                if (jtag_id == omap_ids[i].jtag_id
199                    && die_rev == omap_ids[i].die_rev
200                    && omap_id == omap_ids[i].omap_id) {
201                        system_rev = omap_ids[i].type;
202                        break;
203                }
204        }
205
206        /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
207        cpu_type = system_rev >> 24;
208
209        switch (cpu_type) {
210        case 0x07:
211                system_rev |= 0x07;
212                break;
213        case 0x03:
214        case 0x15:
215                system_rev |= 0x15;
216                break;
217        case 0x16:
218        case 0x17:
219                system_rev |= 0x16;
220                break;
221        case 0x24:
222                system_rev |= 0x24;
223                break;
224        default:
225                printf("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
226        }
227
228        printf("CPU:   OMAP%04x", system_rev >> 16);
229        if ((system_rev >> 8) & 0xff)
230                printf("%x", (system_rev >> 8) & 0xff);
231#ifdef DEBUG
232        printf(" revision %i handled as %02xxx id: %08x%08x",
233               die_rev, system_rev & 0xff, system_serial_low, system_serial_high);
234#endif
235        printf(" at %ld.%01ld MHz (DPLL1=%ld.%01ld MHz)\n",
236               armcore() / 1000000, (armcore() / 100000) % 10,
237               dpll1() / 1000000, (dpll1() / 100000) % 10);
238
239        return 0;
240}
241
242#endif /* #if defined(CONFIG_DISPLAY_CPUINFO) && defined(CONFIG_OMAP) */
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