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 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
19 #include <asm/cputype.h>
21 #include <mach/common.h>
22 #include <mach/control.h>
25 static struct omap_chip_id omap_chip;
28 * omap_chip_is - test whether currently running OMAP matches a chip type
29 * @oc: omap_chip_t to test against
31 * Test whether the currently-running OMAP chip matches the supplied
32 * chip type 'oc'. Returns 1 upon a match; 0 upon failure.
34 int omap_chip_is(struct omap_chip_id oci)
36 return (oci.oc & omap_chip.oc) ? 1 : 0;
38 EXPORT_SYMBOL(omap_chip_is);
44 if (cpu_is_omap24xx()) {
45 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
46 } else if (cpu_is_omap34xx()) {
47 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
49 pr_err("Cannot detect omap type!\n");
53 val &= OMAP2_DEVICETYPE_MASK;
59 EXPORT_SYMBOL(omap_type);
62 /*----------------------------------------------------------------------------*/
64 #define OMAP_TAP_IDCODE 0x0204
65 #define OMAP_TAP_DIE_ID_0 0x0218
66 #define OMAP_TAP_DIE_ID_1 0x021C
67 #define OMAP_TAP_DIE_ID_2 0x0220
68 #define OMAP_TAP_DIE_ID_3 0x0224
70 #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
73 u16 hawkeye; /* Silicon type (Hawkeye id) */
74 u8 dev; /* Device type from production_id reg */
75 u32 type; /* Combined type id copied to system_rev */
78 /* Register values to detect the OMAP version */
79 static struct omap_id omap_ids[] __initdata = {
80 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
81 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
82 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
83 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
84 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
85 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
88 static void __iomem *tap_base;
89 static u16 tap_prod_id;
91 void __init omap24xx_check_revision(void)
98 idcode = read_tap_reg(OMAP_TAP_IDCODE);
99 prod_id = read_tap_reg(tap_prod_id);
100 hawkeye = (idcode >> 12) & 0xffff;
101 rev = (idcode >> 28) & 0x0f;
102 dev_type = (prod_id >> 16) & 0x0f;
104 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
105 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
106 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
107 read_tap_reg(OMAP_TAP_DIE_ID_0));
108 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
109 read_tap_reg(OMAP_TAP_DIE_ID_1),
110 (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
111 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
112 read_tap_reg(OMAP_TAP_DIE_ID_2));
113 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
114 read_tap_reg(OMAP_TAP_DIE_ID_3));
115 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
118 /* Check hawkeye ids */
119 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
120 if (hawkeye == omap_ids[i].hawkeye)
124 if (i == ARRAY_SIZE(omap_ids)) {
125 printk(KERN_ERR "Unknown OMAP CPU id\n");
129 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
130 if (dev_type == omap_ids[j].dev)
134 if (j == ARRAY_SIZE(omap_ids)) {
135 printk(KERN_ERR "Unknown OMAP device type. "
136 "Handling it as OMAP%04x\n",
137 omap_ids[i].type >> 16);
141 pr_info("OMAP%04x", system_rev >> 16);
142 if ((system_rev >> 8) & 0x0f)
143 pr_info("ES%x", (system_rev >> 12) & 0xf);
147 void __init omap34xx_check_revision(void)
152 char *rev_name = "ES1.0";
155 * We cannot access revision registers on ES1.0.
156 * If the processor type is Cortex-A8 and the revision is 0x0
157 * it means its Cortex r0p0 which is 3430 ES1.0.
159 cpuid = read_cpuid(CPUID_ID);
160 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
161 system_rev = OMAP3430_REV_ES1_0;
166 * Detection for 34xx ES2.0 and above can be done with just
167 * hawkeye and rev. See TRM 1.5.2 Device Identification.
168 * Note that rev does not map directly to our defined processor
169 * revision numbers as ES1.0 uses value 0.
171 idcode = read_tap_reg(OMAP_TAP_IDCODE);
172 hawkeye = (idcode >> 12) & 0xffff;
173 rev = (idcode >> 28) & 0xff;
175 if (hawkeye == 0xb7ae) {
178 system_rev = OMAP3430_REV_ES2_0;
182 system_rev = OMAP3430_REV_ES2_1;
186 system_rev = OMAP3430_REV_ES3_0;
190 /* Use the latest known revision as default */
191 system_rev = OMAP3430_REV_ES3_0;
192 rev_name = "Unknown revision\n";
197 pr_info("OMAP%04x %s\n", system_rev >> 16, rev_name);
201 * Try to detect the exact revision of the omap we're running on
203 void __init omap2_check_revision(void)
206 * At this point we have an idea about the processor revision set
207 * earlier with omap2_set_globals_tap().
209 if (cpu_is_omap24xx())
210 omap24xx_check_revision();
211 else if (cpu_is_omap34xx())
212 omap34xx_check_revision();
214 pr_err("OMAP revision unknown, please fix!\n");
217 * OK, now we know the exact revision. Initialize omap_chip bits
218 * for powerdowmain and clockdomain code.
220 if (cpu_is_omap243x()) {
221 /* Currently only supports 2430ES2.1 and 2430-all */
222 omap_chip.oc |= CHIP_IS_OMAP2430;
223 } else if (cpu_is_omap242x()) {
224 /* Currently only supports 2420ES2.1.1 and 2420-all */
225 omap_chip.oc |= CHIP_IS_OMAP2420;
226 } else if (cpu_is_omap343x()) {
227 omap_chip.oc = CHIP_IS_OMAP3430;
228 if (system_rev == OMAP3430_REV_ES1_0)
229 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
230 else if (system_rev > OMAP3430_REV_ES1_0)
231 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
233 pr_err("Uninitialized omap_chip, please fix!\n");
238 * Set up things for map_io and processor detection later on. Gets called
239 * pretty much first thing from board init. For multi-omap, this gets
240 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
241 * detect the exact revision later on in omap2_detect_revision() once map_io
244 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
246 system_rev = omap2_globals->class;
247 tap_base = omap2_globals->tap;
249 if (cpu_is_omap34xx())
250 tap_prod_id = 0x0210;
252 tap_prod_id = 0x0208;