omap2plus: clockdomain: Trivial fix for build break because of clktrctrl_mask
[pandora-kernel.git] / arch / arm / mach-omap2 / id.c
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  *
9  * Copyright (C) 2009 Texas Instruments
10  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
11  *
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
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/io.h>
21
22 #include <asm/cputype.h>
23
24 #include <plat/common.h>
25 #include <plat/cpu.h>
26
27 #include <mach/id.h>
28
29 #include "control.h"
30
31 static struct omap_chip_id omap_chip;
32 static unsigned int omap_revision;
33
34 u32 omap3_features;
35
36 unsigned int omap_rev(void)
37 {
38         return omap_revision;
39 }
40 EXPORT_SYMBOL(omap_rev);
41
42 /**
43  * omap_chip_is - test whether currently running OMAP matches a chip type
44  * @oc: omap_chip_t to test against
45  *
46  * Test whether the currently-running OMAP chip matches the supplied
47  * chip type 'oc'.  Returns 1 upon a match; 0 upon failure.
48  */
49 int omap_chip_is(struct omap_chip_id oci)
50 {
51         return (oci.oc & omap_chip.oc) ? 1 : 0;
52 }
53 EXPORT_SYMBOL(omap_chip_is);
54
55 int omap_type(void)
56 {
57         u32 val = 0;
58
59         if (cpu_is_omap24xx()) {
60                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
61         } else if (cpu_is_omap34xx()) {
62                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
63         } else if (cpu_is_omap44xx()) {
64                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
65         } else {
66                 pr_err("Cannot detect omap type!\n");
67                 goto out;
68         }
69
70         val &= OMAP2_DEVICETYPE_MASK;
71         val >>= 8;
72
73 out:
74         return val;
75 }
76 EXPORT_SYMBOL(omap_type);
77
78
79 /*----------------------------------------------------------------------------*/
80
81 #define OMAP_TAP_IDCODE         0x0204
82 #define OMAP_TAP_DIE_ID_0       0x0218
83 #define OMAP_TAP_DIE_ID_1       0x021C
84 #define OMAP_TAP_DIE_ID_2       0x0220
85 #define OMAP_TAP_DIE_ID_3       0x0224
86
87 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
88
89 struct omap_id {
90         u16     hawkeye;        /* Silicon type (Hawkeye id) */
91         u8      dev;            /* Device type from production_id reg */
92         u32     type;           /* Combined type id copied to omap_revision */
93 };
94
95 /* Register values to detect the OMAP version */
96 static struct omap_id omap_ids[] __initdata = {
97         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
98         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
99         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
100         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
101         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
102         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
103 };
104
105 static void __iomem *tap_base;
106 static u16 tap_prod_id;
107
108 void omap_get_die_id(struct omap_die_id *odi)
109 {
110         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
111         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
112         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
113         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
114 }
115
116 static void __init omap24xx_check_revision(void)
117 {
118         int i, j;
119         u32 idcode, prod_id;
120         u16 hawkeye;
121         u8  dev_type, rev;
122         struct omap_die_id odi;
123
124         idcode = read_tap_reg(OMAP_TAP_IDCODE);
125         prod_id = read_tap_reg(tap_prod_id);
126         hawkeye = (idcode >> 12) & 0xffff;
127         rev = (idcode >> 28) & 0x0f;
128         dev_type = (prod_id >> 16) & 0x0f;
129         omap_get_die_id(&odi);
130
131         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
132                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
133         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
134         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
135                  odi.id_1, (odi.id_1 >> 28) & 0xf);
136         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
137         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
138         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
139                  prod_id, dev_type);
140
141         /* Check hawkeye ids */
142         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
143                 if (hawkeye == omap_ids[i].hawkeye)
144                         break;
145         }
146
147         if (i == ARRAY_SIZE(omap_ids)) {
148                 printk(KERN_ERR "Unknown OMAP CPU id\n");
149                 return;
150         }
151
152         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
153                 if (dev_type == omap_ids[j].dev)
154                         break;
155         }
156
157         if (j == ARRAY_SIZE(omap_ids)) {
158                 printk(KERN_ERR "Unknown OMAP device type. "
159                                 "Handling it as OMAP%04x\n",
160                                 omap_ids[i].type >> 16);
161                 j = i;
162         }
163
164         pr_info("OMAP%04x", omap_rev() >> 16);
165         if ((omap_rev() >> 8) & 0x0f)
166                 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
167         pr_info("\n");
168 }
169
170 #define OMAP3_CHECK_FEATURE(status,feat)                                \
171         if (((status & OMAP3_ ##feat## _MASK)                           \
172                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
173                 omap3_features |= OMAP3_HAS_ ##feat;                    \
174         }
175
176 static void __init omap3_check_features(void)
177 {
178         u32 status;
179
180         omap3_features = 0;
181
182         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
183
184         OMAP3_CHECK_FEATURE(status, L2CACHE);
185         OMAP3_CHECK_FEATURE(status, IVA);
186         OMAP3_CHECK_FEATURE(status, SGX);
187         OMAP3_CHECK_FEATURE(status, NEON);
188         OMAP3_CHECK_FEATURE(status, ISP);
189         if (cpu_is_omap3630())
190                 omap3_features |= OMAP3_HAS_192MHZ_CLK;
191         if (!cpu_is_omap3505() && !cpu_is_omap3517())
192                 omap3_features |= OMAP3_HAS_IO_WAKEUP;
193
194         /*
195          * TODO: Get additional info (where applicable)
196          *       e.g. Size of L2 cache.
197          */
198 }
199
200 static void __init omap3_check_revision(void)
201 {
202         u32 cpuid, idcode;
203         u16 hawkeye;
204         u8 rev;
205
206         omap_chip.oc = CHIP_IS_OMAP3430;
207
208         /*
209          * We cannot access revision registers on ES1.0.
210          * If the processor type is Cortex-A8 and the revision is 0x0
211          * it means its Cortex r0p0 which is 3430 ES1.0.
212          */
213         cpuid = read_cpuid(CPUID_ID);
214         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
215                 omap_revision = OMAP3430_REV_ES1_0;
216                 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
217                 return;
218         }
219
220         /*
221          * Detection for 34xx ES2.0 and above can be done with just
222          * hawkeye and rev. See TRM 1.5.2 Device Identification.
223          * Note that rev does not map directly to our defined processor
224          * revision numbers as ES1.0 uses value 0.
225          */
226         idcode = read_tap_reg(OMAP_TAP_IDCODE);
227         hawkeye = (idcode >> 12) & 0xffff;
228         rev = (idcode >> 28) & 0xff;
229
230         switch (hawkeye) {
231         case 0xb7ae:
232                 /* Handle 34xx/35xx devices */
233                 switch (rev) {
234                 case 0: /* Take care of early samples */
235                 case 1:
236                         omap_revision = OMAP3430_REV_ES2_0;
237                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
238                         break;
239                 case 2:
240                         omap_revision = OMAP3430_REV_ES2_1;
241                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
242                         break;
243                 case 3:
244                         omap_revision = OMAP3430_REV_ES3_0;
245                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
246                         break;
247                 case 4:
248                         omap_revision = OMAP3430_REV_ES3_1;
249                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
250                         break;
251                 case 7:
252                 /* FALLTHROUGH */
253                 default:
254                         /* Use the latest known revision as default */
255                         omap_revision = OMAP3430_REV_ES3_1_2;
256
257                         /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */
258                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
259                 }
260                 break;
261         case 0xb868:
262                 /* Handle OMAP35xx/AM35xx devices
263                  *
264                  * Set the device to be OMAP3505 here. Actual device
265                  * is identified later based on the features.
266                  *
267                  * REVISIT: AM3505/AM3517 should have their own CHIP_IS
268                  */
269                 omap_revision = OMAP3505_REV(rev);
270                 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
271                 break;
272         case 0xb891:
273                 /* Handle 36xx devices */
274                 omap_chip.oc |= CHIP_IS_OMAP3630ES1;
275
276                 switch(rev) {
277                 case 0: /* Take care of early samples */
278                         omap_revision = OMAP3630_REV_ES1_0;
279                         break;
280                 case 1:
281                         omap_revision = OMAP3630_REV_ES1_1;
282                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_1;
283                         break;
284                 case 2:
285                 default:
286                         omap_revision =  OMAP3630_REV_ES1_2;
287                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
288                 }
289                 break;
290         default:
291                 /* Unknown default to latest silicon rev as default*/
292                 omap_revision =  OMAP3630_REV_ES1_2;
293                 omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
294         }
295 }
296
297 static void __init omap4_check_revision(void)
298 {
299         u32 idcode;
300         u16 hawkeye;
301         u8 rev;
302
303         /*
304          * The IC rev detection is done with hawkeye and rev.
305          * Note that rev does not map directly to defined processor
306          * revision numbers as ES1.0 uses value 0.
307          */
308         idcode = read_tap_reg(OMAP_TAP_IDCODE);
309         hawkeye = (idcode >> 12) & 0xffff;
310         rev = (idcode >> 28) & 0xff;
311
312         /*
313          * Few initial ES2.0 samples IDCODE is same as ES1.0
314          * Use ARM register to detect the correct ES version
315          */
316         if (!rev) {
317                 idcode = read_cpuid(CPUID_ID);
318                 rev = (idcode & 0xf) - 1;
319         }
320
321         switch (hawkeye) {
322         case 0xb852:
323                 switch (rev) {
324                 case 0:
325                         omap_revision = OMAP4430_REV_ES1_0;
326                         omap_chip.oc |= CHIP_IS_OMAP4430ES1;
327                         break;
328                 case 1:
329                         omap_revision = OMAP4430_REV_ES2_0;
330                         omap_chip.oc |= CHIP_IS_OMAP4430ES2;
331                         break;
332                 default:
333                         omap_revision = OMAP4430_REV_ES2_0;
334                         omap_chip.oc |= CHIP_IS_OMAP4430ES2;
335         }
336         break;
337         default:
338                 /* Unknown default to latest silicon rev as default*/
339                 omap_revision = OMAP4430_REV_ES2_0;
340                 omap_chip.oc |= CHIP_IS_OMAP4430ES2;
341         }
342
343         pr_info("OMAP%04x ES%d.0\n",
344                         omap_rev() >> 16, ((omap_rev() >> 12) & 0xf) + 1);
345 }
346
347 #define OMAP3_SHOW_FEATURE(feat)                \
348         if (omap3_has_ ##feat())                \
349                 printk(#feat" ");
350
351 static void __init omap3_cpuinfo(void)
352 {
353         u8 rev = GET_OMAP_REVISION();
354         char cpu_name[16], cpu_rev[16];
355
356         /* OMAP3430 and OMAP3530 are assumed to be same.
357          *
358          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
359          * on available features. Upon detection, update the CPU id
360          * and CPU class bits.
361          */
362         if (cpu_is_omap3630()) {
363                 strcpy(cpu_name, "OMAP3630");
364         } else if (cpu_is_omap3505()) {
365                 /*
366                  * AM35xx devices
367                  */
368                 if (omap3_has_sgx()) {
369                         omap_revision = OMAP3517_REV(rev);
370                         strcpy(cpu_name, "AM3517");
371                 } else {
372                         /* Already set in omap3_check_revision() */
373                         strcpy(cpu_name, "AM3505");
374                 }
375         } else if (omap3_has_iva() && omap3_has_sgx()) {
376                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
377                 strcpy(cpu_name, "OMAP3430/3530");
378         } else if (omap3_has_iva()) {
379                 omap_revision = OMAP3525_REV(rev);
380                 strcpy(cpu_name, "OMAP3525");
381         } else if (omap3_has_sgx()) {
382                 omap_revision = OMAP3515_REV(rev);
383                 strcpy(cpu_name, "OMAP3515");
384         } else {
385                 omap_revision = OMAP3503_REV(rev);
386                 strcpy(cpu_name, "OMAP3503");
387         }
388
389         if (cpu_is_omap3630()) {
390                 switch (rev) {
391                 case OMAP_REVBITS_00:
392                         strcpy(cpu_rev, "1.0");
393                         break;
394                 case OMAP_REVBITS_01:
395                         strcpy(cpu_rev, "1.1");
396                         break;
397                 case OMAP_REVBITS_02:
398                         /* FALLTHROUGH */
399                 default:
400                         /* Use the latest known revision as default */
401                         strcpy(cpu_rev, "1.2");
402                 }
403         } else if (cpu_is_omap3505() || cpu_is_omap3517()) {
404                 switch (rev) {
405                 case OMAP_REVBITS_00:
406                         strcpy(cpu_rev, "1.0");
407                         break;
408                 case OMAP_REVBITS_01:
409                         /* FALLTHROUGH */
410                 default:
411                         /* Use the latest known revision as default */
412                         strcpy(cpu_rev, "1.1");
413                 }
414         } else {
415                 switch (rev) {
416                 case OMAP_REVBITS_00:
417                         strcpy(cpu_rev, "1.0");
418                         break;
419                 case OMAP_REVBITS_01:
420                         strcpy(cpu_rev, "2.0");
421                         break;
422                 case OMAP_REVBITS_02:
423                         strcpy(cpu_rev, "2.1");
424                         break;
425                 case OMAP_REVBITS_03:
426                         strcpy(cpu_rev, "3.0");
427                         break;
428                 case OMAP_REVBITS_04:
429                         strcpy(cpu_rev, "3.1");
430                         break;
431                 case OMAP_REVBITS_05:
432                         /* FALLTHROUGH */
433                 default:
434                         /* Use the latest known revision as default */
435                         strcpy(cpu_rev, "3.1.2");
436                 }
437         }
438
439         /* Print verbose information */
440         pr_info("%s ES%s (", cpu_name, cpu_rev);
441
442         OMAP3_SHOW_FEATURE(l2cache);
443         OMAP3_SHOW_FEATURE(iva);
444         OMAP3_SHOW_FEATURE(sgx);
445         OMAP3_SHOW_FEATURE(neon);
446         OMAP3_SHOW_FEATURE(isp);
447         OMAP3_SHOW_FEATURE(192mhz_clk);
448
449         printk(")\n");
450 }
451
452 /*
453  * Try to detect the exact revision of the omap we're running on
454  */
455 void __init omap2_check_revision(void)
456 {
457         /*
458          * At this point we have an idea about the processor revision set
459          * earlier with omap2_set_globals_tap().
460          */
461         if (cpu_is_omap24xx()) {
462                 omap24xx_check_revision();
463         } else if (cpu_is_omap34xx()) {
464                 omap3_check_revision();
465                 omap3_check_features();
466                 omap3_cpuinfo();
467                 return;
468         } else if (cpu_is_omap44xx()) {
469                 omap4_check_revision();
470                 return;
471         } else {
472                 pr_err("OMAP revision unknown, please fix!\n");
473         }
474
475         /*
476          * OK, now we know the exact revision. Initialize omap_chip bits
477          * for powerdowmain and clockdomain code.
478          */
479         if (cpu_is_omap243x()) {
480                 /* Currently only supports 2430ES2.1 and 2430-all */
481                 omap_chip.oc |= CHIP_IS_OMAP2430;
482                 return;
483         } else if (cpu_is_omap242x()) {
484                 /* Currently only supports 2420ES2.1.1 and 2420-all */
485                 omap_chip.oc |= CHIP_IS_OMAP2420;
486                 return;
487         }
488
489         pr_err("Uninitialized omap_chip, please fix!\n");
490 }
491
492 /*
493  * Set up things for map_io and processor detection later on. Gets called
494  * pretty much first thing from board init. For multi-omap, this gets
495  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
496  * detect the exact revision later on in omap2_detect_revision() once map_io
497  * is done.
498  */
499 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
500 {
501         omap_revision = omap2_globals->class;
502         tap_base = omap2_globals->tap;
503
504         if (cpu_is_omap34xx())
505                 tap_prod_id = 0x0210;
506         else
507                 tap_prod_id = 0x0208;
508 }