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 * Copyright (C) 2009 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
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.
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
22 #include <asm/cputype.h>
24 #include <mach/common.h>
25 #include <mach/control.h>
28 static struct omap_chip_id omap_chip;
29 static unsigned int omap_revision;
32 unsigned int omap_rev(void)
36 EXPORT_SYMBOL(omap_rev);
39 * omap_chip_is - test whether currently running OMAP matches a chip type
40 * @oc: omap_chip_t to test against
42 * Test whether the currently-running OMAP chip matches the supplied
43 * chip type 'oc'. Returns 1 upon a match; 0 upon failure.
45 int omap_chip_is(struct omap_chip_id oci)
47 return (oci.oc & omap_chip.oc) ? 1 : 0;
49 EXPORT_SYMBOL(omap_chip_is);
51 /*----------------------------------------------------------------------------*/
53 #define OMAP_TAP_IDCODE 0x0204
54 #define OMAP_TAP_DIE_ID_0 0x0218
55 #define OMAP_TAP_DIE_ID_1 0x021C
56 #define OMAP_TAP_DIE_ID_2 0x0220
57 #define OMAP_TAP_DIE_ID_3 0x0224
59 #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
62 u16 hawkeye; /* Silicon type (Hawkeye id) */
63 u8 dev; /* Device type from production_id reg */
64 u32 type; /* Combined type id copied to omap_revision */
67 /* Register values to detect the OMAP version */
68 static struct omap_id omap_ids[] __initdata = {
69 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
70 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
71 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
72 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
73 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
74 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
77 static void __iomem *tap_base;
78 static u16 tap_prod_id;
80 void __init omap24xx_check_revision(void)
87 idcode = read_tap_reg(OMAP_TAP_IDCODE);
88 prod_id = read_tap_reg(tap_prod_id);
89 hawkeye = (idcode >> 12) & 0xffff;
90 rev = (idcode >> 28) & 0x0f;
91 dev_type = (prod_id >> 16) & 0x0f;
93 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
94 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
95 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
96 read_tap_reg(OMAP_TAP_DIE_ID_0));
97 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
98 read_tap_reg(OMAP_TAP_DIE_ID_1),
99 (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
100 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
101 read_tap_reg(OMAP_TAP_DIE_ID_2));
102 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
103 read_tap_reg(OMAP_TAP_DIE_ID_3));
104 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
107 /* Check hawkeye ids */
108 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
109 if (hawkeye == omap_ids[i].hawkeye)
113 if (i == ARRAY_SIZE(omap_ids)) {
114 printk(KERN_ERR "Unknown OMAP CPU id\n");
118 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
119 if (dev_type == omap_ids[j].dev)
123 if (j == ARRAY_SIZE(omap_ids)) {
124 printk(KERN_ERR "Unknown OMAP device type. "
125 "Handling it as OMAP%04x\n",
126 omap_ids[i].type >> 16);
130 pr_info("OMAP%04x", omap_rev() >> 16);
131 if ((omap_rev() >> 8) & 0x0f)
132 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
136 void __init omap34xx_check_revision(void)
141 char *rev_name = "ES1.0";
144 * We cannot access revision registers on ES1.0.
145 * If the processor type is Cortex-A8 and the revision is 0x0
146 * it means its Cortex r0p0 which is 3430 ES1.0.
148 cpuid = read_cpuid(CPUID_ID);
149 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
150 omap_revision = OMAP3430_REV_ES1_0;
155 * Detection for 34xx ES2.0 and above can be done with just
156 * hawkeye and rev. See TRM 1.5.2 Device Identification.
157 * Note that rev does not map directly to our defined processor
158 * revision numbers as ES1.0 uses value 0.
160 idcode = read_tap_reg(OMAP_TAP_IDCODE);
161 hawkeye = (idcode >> 12) & 0xffff;
162 rev = (idcode >> 28) & 0xff;
164 if (hawkeye == 0xb7ae) {
167 omap_revision = OMAP3430_REV_ES2_0;
171 omap_revision = OMAP3430_REV_ES2_1;
175 omap_revision = OMAP3430_REV_ES3_0;
179 omap_revision = OMAP3430_REV_ES3_1;
183 /* Use the latest known revision as default */
184 omap_revision = OMAP3430_REV_ES3_1;
185 rev_name = "Unknown revision\n";
190 pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
194 * Try to detect the exact revision of the omap we're running on
196 void __init omap2_check_revision(void)
199 * At this point we have an idea about the processor revision set
200 * earlier with omap2_set_globals_tap().
202 if (cpu_is_omap24xx())
203 omap24xx_check_revision();
204 else if (cpu_is_omap34xx())
205 omap34xx_check_revision();
206 else if (cpu_is_omap44xx()) {
207 printk(KERN_INFO "FIXME: CPU revision = OMAP4430\n");
210 pr_err("OMAP revision unknown, please fix!\n");
213 * OK, now we know the exact revision. Initialize omap_chip bits
214 * for powerdowmain and clockdomain code.
216 if (cpu_is_omap243x()) {
217 /* Currently only supports 2430ES2.1 and 2430-all */
218 omap_chip.oc |= CHIP_IS_OMAP2430;
219 } else if (cpu_is_omap242x()) {
220 /* Currently only supports 2420ES2.1.1 and 2420-all */
221 omap_chip.oc |= CHIP_IS_OMAP2420;
222 } else if (cpu_is_omap343x()) {
223 omap_chip.oc = CHIP_IS_OMAP3430;
224 if (omap_rev() == OMAP3430_REV_ES1_0)
225 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
226 else if (omap_rev() >= OMAP3430_REV_ES2_0 &&
227 omap_rev() <= OMAP3430_REV_ES2_1)
228 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
229 else if (omap_rev() == OMAP3430_REV_ES3_0)
230 omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
231 else if (omap_rev() == OMAP3430_REV_ES3_1)
232 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
234 pr_err("Uninitialized omap_chip, please fix!\n");
239 * Set up things for map_io and processor detection later on. Gets called
240 * pretty much first thing from board init. For multi-omap, this gets
241 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
242 * detect the exact revision later on in omap2_detect_revision() once map_io
245 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
247 omap_revision = omap2_globals->class;
248 tap_base = omap2_globals->tap;
250 if (cpu_is_omap34xx())
251 tap_prod_id = 0x0210;
253 tap_prod_id = 0x0208;