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);
55 if (cpu_is_omap24xx())
56 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
57 else if (cpu_is_omap34xx())
58 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
60 pr_err("Cannot detect omap type!\n");
64 val &= OMAP2_DEVICETYPE_MASK;
70 EXPORT_SYMBOL(omap_type);
73 /*----------------------------------------------------------------------------*/
75 #define OMAP_TAP_IDCODE 0x0204
76 #define OMAP_TAP_DIE_ID_0 0x0218
77 #define OMAP_TAP_DIE_ID_1 0x021C
78 #define OMAP_TAP_DIE_ID_2 0x0220
79 #define OMAP_TAP_DIE_ID_3 0x0224
81 #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
84 u16 hawkeye; /* Silicon type (Hawkeye id) */
85 u8 dev; /* Device type from production_id reg */
86 u32 type; /* Combined type id copied to omap_revision */
89 /* Register values to detect the OMAP version */
90 static struct omap_id omap_ids[] __initdata = {
91 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
92 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
93 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
94 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
95 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
96 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
99 static void __iomem *tap_base;
100 static u16 tap_prod_id;
102 void __init omap24xx_check_revision(void)
109 idcode = read_tap_reg(OMAP_TAP_IDCODE);
110 prod_id = read_tap_reg(tap_prod_id);
111 hawkeye = (idcode >> 12) & 0xffff;
112 rev = (idcode >> 28) & 0x0f;
113 dev_type = (prod_id >> 16) & 0x0f;
115 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
116 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
117 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
118 read_tap_reg(OMAP_TAP_DIE_ID_0));
119 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
120 read_tap_reg(OMAP_TAP_DIE_ID_1),
121 (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
122 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
123 read_tap_reg(OMAP_TAP_DIE_ID_2));
124 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
125 read_tap_reg(OMAP_TAP_DIE_ID_3));
126 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
129 /* Check hawkeye ids */
130 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
131 if (hawkeye == omap_ids[i].hawkeye)
135 if (i == ARRAY_SIZE(omap_ids)) {
136 printk(KERN_ERR "Unknown OMAP CPU id\n");
140 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
141 if (dev_type == omap_ids[j].dev)
145 if (j == ARRAY_SIZE(omap_ids)) {
146 printk(KERN_ERR "Unknown OMAP device type. "
147 "Handling it as OMAP%04x\n",
148 omap_ids[i].type >> 16);
152 pr_info("OMAP%04x", omap_rev() >> 16);
153 if ((omap_rev() >> 8) & 0x0f)
154 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
158 void __init omap34xx_check_revision(void)
163 char *rev_name = "ES1.0";
166 * We cannot access revision registers on ES1.0.
167 * If the processor type is Cortex-A8 and the revision is 0x0
168 * it means its Cortex r0p0 which is 3430 ES1.0.
170 cpuid = read_cpuid(CPUID_ID);
171 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
172 omap_revision = OMAP3430_REV_ES1_0;
177 * Detection for 34xx ES2.0 and above can be done with just
178 * hawkeye and rev. See TRM 1.5.2 Device Identification.
179 * Note that rev does not map directly to our defined processor
180 * revision numbers as ES1.0 uses value 0.
182 idcode = read_tap_reg(OMAP_TAP_IDCODE);
183 hawkeye = (idcode >> 12) & 0xffff;
184 rev = (idcode >> 28) & 0xff;
186 if (hawkeye == 0xb7ae) {
189 omap_revision = OMAP3430_REV_ES2_0;
193 omap_revision = OMAP3430_REV_ES2_1;
197 omap_revision = OMAP3430_REV_ES3_0;
201 omap_revision = OMAP3430_REV_ES3_1;
205 /* Use the latest known revision as default */
206 omap_revision = OMAP3430_REV_ES3_1;
207 rev_name = "Unknown revision\n";
212 pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
216 * Try to detect the exact revision of the omap we're running on
218 void __init omap2_check_revision(void)
221 * At this point we have an idea about the processor revision set
222 * earlier with omap2_set_globals_tap().
224 if (cpu_is_omap24xx())
225 omap24xx_check_revision();
226 else if (cpu_is_omap34xx())
227 omap34xx_check_revision();
228 else if (cpu_is_omap44xx()) {
229 printk(KERN_INFO "FIXME: CPU revision = OMAP4430\n");
232 pr_err("OMAP revision unknown, please fix!\n");
235 * OK, now we know the exact revision. Initialize omap_chip bits
236 * for powerdowmain and clockdomain code.
238 if (cpu_is_omap243x()) {
239 /* Currently only supports 2430ES2.1 and 2430-all */
240 omap_chip.oc |= CHIP_IS_OMAP2430;
241 } else if (cpu_is_omap242x()) {
242 /* Currently only supports 2420ES2.1.1 and 2420-all */
243 omap_chip.oc |= CHIP_IS_OMAP2420;
244 } else if (cpu_is_omap343x()) {
245 omap_chip.oc = CHIP_IS_OMAP3430;
246 if (omap_rev() == OMAP3430_REV_ES1_0)
247 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
248 else if (omap_rev() >= OMAP3430_REV_ES2_0 &&
249 omap_rev() <= OMAP3430_REV_ES2_1)
250 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
251 else if (omap_rev() == OMAP3430_REV_ES3_0)
252 omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
253 else if (omap_rev() == OMAP3430_REV_ES3_1)
254 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
256 pr_err("Uninitialized omap_chip, please fix!\n");
261 * Set up things for map_io and processor detection later on. Gets called
262 * pretty much first thing from board init. For multi-omap, this gets
263 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
264 * detect the exact revision later on in omap2_detect_revision() once map_io
267 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
269 omap_revision = omap2_globals->class;
270 tap_base = omap2_globals->tap;
272 if (cpu_is_omap34xx())
273 tap_prod_id = 0x0210;
275 tap_prod_id = 0x0208;