2 * linux/arch/arm/mach-omap2/id.c
4 * OMAP2 CPU identification code
6 * Copyright (C) 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
18 #include <asm/cputype.h>
21 #include <mach/control.h>
24 #if defined(CONFIG_ARCH_OMAP2420)
25 #define TAP_BASE io_p2v(0x48014000)
26 #elif defined(CONFIG_ARCH_OMAP2430)
27 #define TAP_BASE io_p2v(0x4900A000)
28 #elif defined(CONFIG_ARCH_OMAP34XX)
29 #define TAP_BASE io_p2v(0x4830A000)
32 #define OMAP_TAP_IDCODE 0x0204
33 #if defined(CONFIG_ARCH_OMAP34XX)
34 #define OMAP_TAP_PROD_ID 0x0210
36 #define OMAP_TAP_PROD_ID 0x0208
39 #define OMAP_TAP_DIE_ID_0 0x0218
40 #define OMAP_TAP_DIE_ID_1 0x021C
41 #define OMAP_TAP_DIE_ID_2 0x0220
42 #define OMAP_TAP_DIE_ID_3 0x0224
44 /* system_rev fields for OMAP2 processors:
45 * CPU id bits [31:16],
46 * CPU device type [15:12], (unprg,normal,POP)
47 * CPU revision [11:08]
48 * CPU class bits [07:00]
52 u16 hawkeye
; /* Silicon type (Hawkeye id) */
53 u8 dev
; /* Device type from production_id reg */
54 u32 type
; /* combined type id copied to system_rev */
57 /* Register values to detect the OMAP version */
58 static struct omap_id omap_ids
[] __initdata
= {
59 { .hawkeye
= 0xb5d9, .dev
= 0x0, .type
= 0x24200000 },
60 { .hawkeye
= 0xb5d9, .dev
= 0x1, .type
= 0x24201000 },
61 { .hawkeye
= 0xb5d9, .dev
= 0x2, .type
= 0x24202000 },
62 { .hawkeye
= 0xb5d9, .dev
= 0x4, .type
= 0x24220000 },
63 { .hawkeye
= 0xb5d9, .dev
= 0x8, .type
= 0x24230000 },
64 { .hawkeye
= 0xb68a, .dev
= 0x0, .type
= 0x24300000 },
67 static struct omap_chip_id omap_chip
;
70 * omap_chip_is - test whether currently running OMAP matches a chip type
71 * @oc: omap_chip_t to test against
73 * Test whether the currently-running OMAP chip matches the supplied
74 * chip type 'oc'. Returns 1 upon a match; 0 upon failure.
76 int omap_chip_is(struct omap_chip_id oci
)
78 return (oci
.oc
& omap_chip
.oc
) ? 1 : 0;
80 EXPORT_SYMBOL(omap_chip_is
);
82 static u32 __init
read_tap_reg(int reg
)
84 unsigned int regval
= 0;
87 /* Reading the IDCODE register on 3430 ES1 results in a
88 * data abort as the register is not exposed on the OCP
89 * Hence reading the Cortex Rev
91 cpuid
= read_cpuid(CPUID_ID
);
93 /* If the processor type is Cortex-A8 and the revision is 0x0
94 * it means its Cortex r0p0 which is 3430 ES1
96 if ((((cpuid
>> 4) & 0xFFF) == 0xC08) && ((cpuid
& 0xF) == 0x0)) {
98 case OMAP_TAP_IDCODE
: regval
= 0x0B7AE02F; break;
99 /* Making DevType as 0xF in ES1 to differ from ES2 */
100 case OMAP_TAP_PROD_ID
: regval
= 0x000F00F0; break;
101 case OMAP_TAP_DIE_ID_0
: regval
= 0x01000000; break;
102 case OMAP_TAP_DIE_ID_1
: regval
= 0x1012d687; break;
103 case OMAP_TAP_DIE_ID_2
: regval
= 0x00000000; break;
104 case OMAP_TAP_DIE_ID_3
: regval
= 0x2d2c0000; break;
107 regval
= __raw_readl(TAP_BASE
+ reg
);
114 * _set_system_rev - set the system_rev global based on current OMAP chip type
116 * Set the system_rev global. This is primarily used by the cpu_is_omapxxxx()
119 static void __init
_set_system_rev(u32 type
, u8 rev
)
124 * system_rev encoding is as follows
125 * system_rev & 0xff000000 -> Omap Class (24xx/34xx)
126 * system_rev & 0xfff00000 -> Omap Sub Class (242x/343x)
127 * system_rev & 0xffff0000 -> Omap type (2420/2422/2423/2430/3430)
128 * system_rev & 0x0000f000 -> Silicon revision (ES1, ES2 )
129 * system_rev & 0x00000700 -> Device Type ( EMU/HS/GP/BAD )
130 * system_rev & 0x000000c0 -> IDCODE revision[6:7]
131 * system_rev & 0x0000003f -> sys_boot[0:5]
133 /* Embedding the ES revision info in type field */
135 /* Also add IDCODE revision info only two lower bits */
136 system_rev
|= ((rev
& 0x3) << 6);
138 /* Add in the device type and sys_boot fields (see above) */
139 if (cpu_is_omap24xx()) {
140 i
= OMAP24XX_CONTROL_STATUS
;
141 } else if (cpu_is_omap343x()) {
142 i
= OMAP343X_CONTROL_STATUS
;
144 printk(KERN_ERR
"id: unknown CPU type\n");
147 ctrl_status
= omap_ctrl_readl(i
);
148 system_rev
|= (ctrl_status
& (OMAP2_SYSBOOT_5_MASK
|
149 OMAP2_SYSBOOT_4_MASK
|
150 OMAP2_SYSBOOT_3_MASK
|
151 OMAP2_SYSBOOT_2_MASK
|
152 OMAP2_SYSBOOT_1_MASK
|
153 OMAP2_SYSBOOT_0_MASK
));
154 system_rev
|= (ctrl_status
& OMAP2_DEVICETYPE_MASK
);
159 * _set_omap_chip - set the omap_chip global based on OMAP chip type
161 * Build the omap_chip bits. This variable is used by powerdomain and
162 * clockdomain code to indicate whether structures are applicable for
163 * the current OMAP chip type by ANDing it against a 'platform' bitfield
166 static void __init
_set_omap_chip(void)
168 if (cpu_is_omap343x()) {
170 omap_chip
.oc
= CHIP_IS_OMAP3430
;
171 if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0
))
172 omap_chip
.oc
|= CHIP_IS_OMAP3430ES1
;
173 else if (is_sil_rev_greater_than(OMAP3430_REV_ES1_0
))
174 omap_chip
.oc
|= CHIP_IS_OMAP3430ES2
;
176 } else if (cpu_is_omap243x()) {
178 /* Currently only supports 2430ES2.1 and 2430-all */
179 omap_chip
.oc
|= CHIP_IS_OMAP2430
;
181 } else if (cpu_is_omap242x()) {
183 /* Currently only supports 2420ES2.1.1 and 2420-all */
184 omap_chip
.oc
|= CHIP_IS_OMAP2420
;
188 /* Current CPU not supported by this code. */
189 printk(KERN_WARNING
"OMAP chip type code does not yet support "
197 void __init
omap2_check_revision(void)
206 idcode
= read_tap_reg(OMAP_TAP_IDCODE
);
207 prod_id
= read_tap_reg(OMAP_TAP_PROD_ID
);
208 hawkeye
= (idcode
>> 12) & 0xffff;
209 rev
= (idcode
>> 28) & 0x0f;
210 dev_type
= (prod_id
>> 16) & 0x0f;
212 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
213 idcode
, rev
, hawkeye
, (idcode
>> 1) & 0x7ff);
214 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
215 read_tap_reg(OMAP_TAP_DIE_ID_0
));
216 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
217 read_tap_reg(OMAP_TAP_DIE_ID_1
),
218 (read_tap_reg(OMAP_TAP_DIE_ID_1
) >> 28) & 0xf);
219 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
220 read_tap_reg(OMAP_TAP_DIE_ID_2
));
221 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
222 read_tap_reg(OMAP_TAP_DIE_ID_3
));
223 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
227 * Detection for 34xx ES2.0 and above can be done with just
228 * hawkeye and rev. See TRM 1.5.2 Device Identification.
229 * Note that rev cannot be used directly as ES1.0 uses value 0.
231 if (hawkeye
== 0xb7ae) {
232 system_rev
= 0x34300000 | ((1 + rev
) << 12);
233 pr_info("OMAP%04x ES2.%i\n", system_rev
>> 16, rev
);
238 /* Check hawkeye ids */
239 for (i
= 0; i
< ARRAY_SIZE(omap_ids
); i
++) {
240 if (hawkeye
== omap_ids
[i
].hawkeye
)
244 if (i
== ARRAY_SIZE(omap_ids
)) {
245 printk(KERN_ERR
"Unknown OMAP CPU id\n");
249 for (j
= i
; j
< ARRAY_SIZE(omap_ids
); j
++) {
250 if (dev_type
== omap_ids
[j
].dev
)
254 if (j
== ARRAY_SIZE(omap_ids
)) {
255 printk(KERN_ERR
"Unknown OMAP device type. "
256 "Handling it as OMAP%04x\n",
257 omap_ids
[i
].type
>> 16);
261 _set_system_rev(omap_ids
[j
].type
, rev
);
265 pr_info("OMAP%04x", system_rev
>> 16);
266 if ((system_rev
>> 8) & 0x0f)
267 pr_info("ES%x", (system_rev
>> 12) & 0xf);