omap3: Runtime detection of Si features
[deliverable/linux.git] / arch / arm / mach-omap2 / id.c
CommitLineData
1dbae815
TL
1/*
2 * linux/arch/arm/mach-omap2/id.c
3 *
4 * OMAP2 CPU identification code
5 *
6 * Copyright (C) 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
8 *
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9 * Copyright (C) 2009 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
11 *
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12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
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17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
fced80c7 20#include <linux/io.h>
1dbae815 21
0ba8b9b2 22#include <asm/cputype.h>
1dbae815 23
ce491cf8
TL
24#include <plat/common.h>
25#include <plat/control.h>
26#include <plat/cpu.h>
72d0f1c3 27
097c584c 28static struct omap_chip_id omap_chip;
84a34344
LL
29static unsigned int omap_revision;
30
8384ce07 31u32 omap3_features;
84a34344
LL
32
33unsigned int omap_rev(void)
34{
35 return omap_revision;
36}
37EXPORT_SYMBOL(omap_rev);
097c584c
PW
38
39/**
40 * omap_chip_is - test whether currently running OMAP matches a chip type
41 * @oc: omap_chip_t to test against
42 *
43 * Test whether the currently-running OMAP chip matches the supplied
44 * chip type 'oc'. Returns 1 upon a match; 0 upon failure.
45 */
46int omap_chip_is(struct omap_chip_id oci)
47{
48 return (oci.oc & omap_chip.oc) ? 1 : 0;
49}
50EXPORT_SYMBOL(omap_chip_is);
51
8e25ad96
KH
52int omap_type(void)
53{
54 u32 val = 0;
55
56 if (cpu_is_omap24xx())
57 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
58 else if (cpu_is_omap34xx())
59 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
60 else {
61 pr_err("Cannot detect omap type!\n");
62 goto out;
63 }
64
65 val &= OMAP2_DEVICETYPE_MASK;
66 val >>= 8;
67
68out:
69 return val;
70}
71EXPORT_SYMBOL(omap_type);
72
73
a8823143 74/*----------------------------------------------------------------------------*/
097c584c 75
a8823143
TL
76#define OMAP_TAP_IDCODE 0x0204
77#define OMAP_TAP_DIE_ID_0 0x0218
78#define OMAP_TAP_DIE_ID_1 0x021C
79#define OMAP_TAP_DIE_ID_2 0x0220
80#define OMAP_TAP_DIE_ID_3 0x0224
097c584c 81
a8823143 82#define read_tap_reg(reg) __raw_readl(tap_base + (reg))
097c584c 83
a8823143
TL
84struct omap_id {
85 u16 hawkeye; /* Silicon type (Hawkeye id) */
86 u8 dev; /* Device type from production_id reg */
84a34344 87 u32 type; /* Combined type id copied to omap_revision */
a8823143 88};
097c584c 89
a8823143
TL
90/* Register values to detect the OMAP version */
91static struct omap_id omap_ids[] __initdata = {
92 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
93 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
94 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
95 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
96 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
97 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
98};
097c584c 99
a8823143
TL
100static void __iomem *tap_base;
101static u16 tap_prod_id;
1dbae815 102
5ba02dca 103void __init omap24xx_check_revision(void)
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TL
104{
105 int i, j;
a8823143 106 u32 idcode, prod_id;
1dbae815 107 u16 hawkeye;
a8823143 108 u8 dev_type, rev;
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TL
109
110 idcode = read_tap_reg(OMAP_TAP_IDCODE);
0e564848 111 prod_id = read_tap_reg(tap_prod_id);
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112 hawkeye = (idcode >> 12) & 0xffff;
113 rev = (idcode >> 28) & 0x0f;
114 dev_type = (prod_id >> 16) & 0x0f;
115
097c584c
PW
116 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
117 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
118 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
119 read_tap_reg(OMAP_TAP_DIE_ID_0));
120 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
121 read_tap_reg(OMAP_TAP_DIE_ID_1),
122 (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
123 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
124 read_tap_reg(OMAP_TAP_DIE_ID_2));
125 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
126 read_tap_reg(OMAP_TAP_DIE_ID_3));
127 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
128 prod_id, dev_type);
129
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TL
130 /* Check hawkeye ids */
131 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
132 if (hawkeye == omap_ids[i].hawkeye)
133 break;
134 }
135
136 if (i == ARRAY_SIZE(omap_ids)) {
137 printk(KERN_ERR "Unknown OMAP CPU id\n");
138 return;
139 }
140
141 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
142 if (dev_type == omap_ids[j].dev)
143 break;
144 }
145
146 if (j == ARRAY_SIZE(omap_ids)) {
147 printk(KERN_ERR "Unknown OMAP device type. "
148 "Handling it as OMAP%04x\n",
149 omap_ids[i].type >> 16);
150 j = i;
151 }
1dbae815 152
84a34344
LL
153 pr_info("OMAP%04x", omap_rev() >> 16);
154 if ((omap_rev() >> 8) & 0x0f)
155 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
097c584c 156 pr_info("\n");
a8823143
TL
157}
158
8384ce07
SP
159#define OMAP3_CHECK_FEATURE(status,feat) \
160 if (((status & OMAP3_ ##feat## _MASK) \
161 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \
162 omap3_features |= OMAP3_HAS_ ##feat; \
163 }
164
165void __init omap3_check_features(void)
166{
167 u32 status;
168
169 omap3_features = 0;
170
171 status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
172
173 OMAP3_CHECK_FEATURE(status, L2CACHE);
174 OMAP3_CHECK_FEATURE(status, IVA);
175 OMAP3_CHECK_FEATURE(status, SGX);
176 OMAP3_CHECK_FEATURE(status, NEON);
177 OMAP3_CHECK_FEATURE(status, ISP);
178
179 /*
180 * TODO: Get additional info (where applicable)
181 * e.g. Size of L2 cache.
182 */
183}
184
185void __init omap3_check_revision(void)
a8823143
TL
186{
187 u32 cpuid, idcode;
188 u16 hawkeye;
189 u8 rev;
190 char *rev_name = "ES1.0";
191
192 /*
193 * We cannot access revision registers on ES1.0.
194 * If the processor type is Cortex-A8 and the revision is 0x0
195 * it means its Cortex r0p0 which is 3430 ES1.0.
196 */
197 cpuid = read_cpuid(CPUID_ID);
198 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
84a34344 199 omap_revision = OMAP3430_REV_ES1_0;
a8823143
TL
200 goto out;
201 }
202
203 /*
204 * Detection for 34xx ES2.0 and above can be done with just
205 * hawkeye and rev. See TRM 1.5.2 Device Identification.
206 * Note that rev does not map directly to our defined processor
207 * revision numbers as ES1.0 uses value 0.
208 */
209 idcode = read_tap_reg(OMAP_TAP_IDCODE);
210 hawkeye = (idcode >> 12) & 0xffff;
211 rev = (idcode >> 28) & 0xff;
097c584c 212
a8823143
TL
213 if (hawkeye == 0xb7ae) {
214 switch (rev) {
215 case 0:
84a34344 216 omap_revision = OMAP3430_REV_ES2_0;
a8823143
TL
217 rev_name = "ES2.0";
218 break;
219 case 2:
84a34344 220 omap_revision = OMAP3430_REV_ES2_1;
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TL
221 rev_name = "ES2.1";
222 break;
223 case 3:
84a34344 224 omap_revision = OMAP3430_REV_ES3_0;
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225 rev_name = "ES3.0";
226 break;
187e688d
TL
227 case 4:
228 omap_revision = OMAP3430_REV_ES3_1;
229 rev_name = "ES3.1";
230 break;
a8823143
TL
231 default:
232 /* Use the latest known revision as default */
187e688d 233 omap_revision = OMAP3430_REV_ES3_1;
a8823143
TL
234 rev_name = "Unknown revision\n";
235 }
236 }
237
238out:
84a34344 239 pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
1dbae815
TL
240}
241
8384ce07
SP
242#define OMAP3_SHOW_FEATURE(feat) \
243 if (omap3_has_ ##feat()) { \
244 pr_info (" - "#feat" : Y"); \
245 } else { \
246 pr_info (" - "#feat" : N"); \
247 }
248
249void __init omap3_cpuinfo(void)
250{
251 OMAP3_SHOW_FEATURE(l2cache);
252 OMAP3_SHOW_FEATURE(iva);
253 OMAP3_SHOW_FEATURE(sgx);
254 OMAP3_SHOW_FEATURE(neon);
255 OMAP3_SHOW_FEATURE(isp);
256}
257
a8823143
TL
258/*
259 * Try to detect the exact revision of the omap we're running on
260 */
5ba02dca
TL
261void __init omap2_check_revision(void)
262{
a8823143
TL
263 /*
264 * At this point we have an idea about the processor revision set
265 * earlier with omap2_set_globals_tap().
266 */
267 if (cpu_is_omap24xx())
268 omap24xx_check_revision();
8384ce07
SP
269 else if (cpu_is_omap34xx()) {
270 omap3_check_features();
271 omap3_check_revision();
272 omap3_cpuinfo();
273 }
44169075
SS
274 else if (cpu_is_omap44xx()) {
275 printk(KERN_INFO "FIXME: CPU revision = OMAP4430\n");
276 return;
277 } else
a8823143
TL
278 pr_err("OMAP revision unknown, please fix!\n");
279
280 /*
281 * OK, now we know the exact revision. Initialize omap_chip bits
282 * for powerdowmain and clockdomain code.
283 */
284 if (cpu_is_omap243x()) {
285 /* Currently only supports 2430ES2.1 and 2430-all */
286 omap_chip.oc |= CHIP_IS_OMAP2430;
287 } else if (cpu_is_omap242x()) {
288 /* Currently only supports 2420ES2.1.1 and 2420-all */
289 omap_chip.oc |= CHIP_IS_OMAP2420;
290 } else if (cpu_is_omap343x()) {
291 omap_chip.oc = CHIP_IS_OMAP3430;
84a34344 292 if (omap_rev() == OMAP3430_REV_ES1_0)
a8823143 293 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
d41ad520
PW
294 else if (omap_rev() >= OMAP3430_REV_ES2_0 &&
295 omap_rev() <= OMAP3430_REV_ES2_1)
a8823143 296 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
d41ad520
PW
297 else if (omap_rev() == OMAP3430_REV_ES3_0)
298 omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
299 else if (omap_rev() == OMAP3430_REV_ES3_1)
300 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
a8823143
TL
301 } else {
302 pr_err("Uninitialized omap_chip, please fix!\n");
303 }
5ba02dca
TL
304}
305
a8823143
TL
306/*
307 * Set up things for map_io and processor detection later on. Gets called
308 * pretty much first thing from board init. For multi-omap, this gets
309 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
310 * detect the exact revision later on in omap2_detect_revision() once map_io
311 * is done.
312 */
0e564848
TL
313void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
314{
84a34344 315 omap_revision = omap2_globals->class;
0e564848
TL
316 tap_base = omap2_globals->tap;
317
a8823143 318 if (cpu_is_omap34xx())
0e564848
TL
319 tap_prod_id = 0x0210;
320 else
321 tap_prod_id = 0x0208;
322}
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