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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 | * | |
44169075 SS |
9 | * Copyright (C) 2009 Texas Instruments |
10 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> | |
11 | * | |
1dbae815 TL |
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 | ||
1dbae815 TL |
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 | 28 | static struct omap_chip_id omap_chip; |
84a34344 LL |
29 | static unsigned int omap_revision; |
30 | ||
8384ce07 | 31 | u32 omap3_features; |
84a34344 LL |
32 | |
33 | unsigned int omap_rev(void) | |
34 | { | |
35 | return omap_revision; | |
36 | } | |
37 | EXPORT_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 | */ | |
46 | int omap_chip_is(struct omap_chip_id oci) | |
47 | { | |
48 | return (oci.oc & omap_chip.oc) ? 1 : 0; | |
49 | } | |
50 | EXPORT_SYMBOL(omap_chip_is); | |
51 | ||
8e25ad96 KH |
52 | int 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 | ||
68 | out: | |
69 | return val; | |
70 | } | |
71 | EXPORT_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 |
84 | struct 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 */ |
91 | static 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 |
100 | static void __iomem *tap_base; |
101 | static u16 tap_prod_id; | |
1dbae815 | 102 | |
5ba02dca | 103 | void __init omap24xx_check_revision(void) |
1dbae815 TL |
104 | { |
105 | int i, j; | |
a8823143 | 106 | u32 idcode, prod_id; |
1dbae815 | 107 | u16 hawkeye; |
a8823143 | 108 | u8 dev_type, rev; |
1dbae815 TL |
109 | |
110 | idcode = read_tap_reg(OMAP_TAP_IDCODE); | |
0e564848 | 111 | prod_id = read_tap_reg(tap_prod_id); |
1dbae815 TL |
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 | ||
1dbae815 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 | ||
165 | void __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 | ||
185 | void __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; |
a8823143 TL |
221 | rev_name = "ES2.1"; |
222 | break; | |
223 | case 3: | |
84a34344 | 224 | omap_revision = OMAP3430_REV_ES3_0; |
a8823143 TL |
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 | ||
238 | out: | |
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 | ||
249 | void __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 |
261 | void __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 |
313 | void __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 | } |