Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 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 | * 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. |
| 12 | */ |
| 13 | |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 17 | #include <linux/io.h> |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 18 | |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 19 | #include <asm/cputype.h> |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 20 | |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 21 | #include <mach/common.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 22 | #include <mach/control.h> |
| 23 | #include <mach/cpu.h> |
Syed Mohammed Khasim | 72d0f1c | 2006-12-06 17:14:05 -0800 | [diff] [blame] | 24 | |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 25 | static struct omap_chip_id omap_chip; |
| 26 | |
| 27 | /** |
| 28 | * omap_chip_is - test whether currently running OMAP matches a chip type |
| 29 | * @oc: omap_chip_t to test against |
| 30 | * |
| 31 | * Test whether the currently-running OMAP chip matches the supplied |
| 32 | * chip type 'oc'. Returns 1 upon a match; 0 upon failure. |
| 33 | */ |
| 34 | int omap_chip_is(struct omap_chip_id oci) |
| 35 | { |
| 36 | return (oci.oc & omap_chip.oc) ? 1 : 0; |
| 37 | } |
| 38 | EXPORT_SYMBOL(omap_chip_is); |
| 39 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 40 | /*----------------------------------------------------------------------------*/ |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 41 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 42 | #define OMAP_TAP_IDCODE 0x0204 |
| 43 | #define OMAP_TAP_DIE_ID_0 0x0218 |
| 44 | #define OMAP_TAP_DIE_ID_1 0x021C |
| 45 | #define OMAP_TAP_DIE_ID_2 0x0220 |
| 46 | #define OMAP_TAP_DIE_ID_3 0x0224 |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 47 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 48 | #define read_tap_reg(reg) __raw_readl(tap_base + (reg)) |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 49 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 50 | struct omap_id { |
| 51 | u16 hawkeye; /* Silicon type (Hawkeye id) */ |
| 52 | u8 dev; /* Device type from production_id reg */ |
| 53 | u32 type; /* Combined type id copied to system_rev */ |
| 54 | }; |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 55 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 56 | /* Register values to detect the OMAP version */ |
| 57 | static struct omap_id omap_ids[] __initdata = { |
| 58 | { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 }, |
| 59 | { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 }, |
| 60 | { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 }, |
| 61 | { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 }, |
| 62 | { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 }, |
| 63 | { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 }, |
| 64 | }; |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 65 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 66 | static void __iomem *tap_base; |
| 67 | static u16 tap_prod_id; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 68 | |
Tony Lindgren | 5ba02dc | 2008-12-10 17:36:30 -0800 | [diff] [blame] | 69 | void __init omap24xx_check_revision(void) |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 70 | { |
| 71 | int i, j; |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 72 | u32 idcode, prod_id; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 73 | u16 hawkeye; |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 74 | u8 dev_type, rev; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 75 | |
| 76 | idcode = read_tap_reg(OMAP_TAP_IDCODE); |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 77 | prod_id = read_tap_reg(tap_prod_id); |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 78 | hawkeye = (idcode >> 12) & 0xffff; |
| 79 | rev = (idcode >> 28) & 0x0f; |
| 80 | dev_type = (prod_id >> 16) & 0x0f; |
| 81 | |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 82 | pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n", |
| 83 | idcode, rev, hawkeye, (idcode >> 1) & 0x7ff); |
| 84 | pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", |
| 85 | read_tap_reg(OMAP_TAP_DIE_ID_0)); |
| 86 | pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n", |
| 87 | read_tap_reg(OMAP_TAP_DIE_ID_1), |
| 88 | (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf); |
| 89 | pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", |
| 90 | read_tap_reg(OMAP_TAP_DIE_ID_2)); |
| 91 | pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", |
| 92 | read_tap_reg(OMAP_TAP_DIE_ID_3)); |
| 93 | pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n", |
| 94 | prod_id, dev_type); |
| 95 | |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 96 | /* Check hawkeye ids */ |
| 97 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { |
| 98 | if (hawkeye == omap_ids[i].hawkeye) |
| 99 | break; |
| 100 | } |
| 101 | |
| 102 | if (i == ARRAY_SIZE(omap_ids)) { |
| 103 | printk(KERN_ERR "Unknown OMAP CPU id\n"); |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | for (j = i; j < ARRAY_SIZE(omap_ids); j++) { |
| 108 | if (dev_type == omap_ids[j].dev) |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | if (j == ARRAY_SIZE(omap_ids)) { |
| 113 | printk(KERN_ERR "Unknown OMAP device type. " |
| 114 | "Handling it as OMAP%04x\n", |
| 115 | omap_ids[i].type >> 16); |
| 116 | j = i; |
| 117 | } |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 118 | |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 119 | pr_info("OMAP%04x", system_rev >> 16); |
| 120 | if ((system_rev >> 8) & 0x0f) |
Paul Walmsley | 097c584 | 2008-07-03 12:24:45 +0300 | [diff] [blame] | 121 | pr_info("ES%x", (system_rev >> 12) & 0xf); |
| 122 | pr_info("\n"); |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 123 | } |
| 124 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 125 | void __init omap34xx_check_revision(void) |
| 126 | { |
| 127 | u32 cpuid, idcode; |
| 128 | u16 hawkeye; |
| 129 | u8 rev; |
| 130 | char *rev_name = "ES1.0"; |
| 131 | |
| 132 | /* |
| 133 | * We cannot access revision registers on ES1.0. |
| 134 | * If the processor type is Cortex-A8 and the revision is 0x0 |
| 135 | * it means its Cortex r0p0 which is 3430 ES1.0. |
| 136 | */ |
| 137 | cpuid = read_cpuid(CPUID_ID); |
| 138 | if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) { |
| 139 | system_rev = OMAP3430_REV_ES1_0; |
| 140 | goto out; |
| 141 | } |
| 142 | |
| 143 | /* |
| 144 | * Detection for 34xx ES2.0 and above can be done with just |
| 145 | * hawkeye and rev. See TRM 1.5.2 Device Identification. |
| 146 | * Note that rev does not map directly to our defined processor |
| 147 | * revision numbers as ES1.0 uses value 0. |
| 148 | */ |
| 149 | idcode = read_tap_reg(OMAP_TAP_IDCODE); |
| 150 | hawkeye = (idcode >> 12) & 0xffff; |
| 151 | rev = (idcode >> 28) & 0xff; |
| 152 | |
| 153 | if (hawkeye == 0xb7ae) { |
| 154 | switch (rev) { |
| 155 | case 0: |
| 156 | system_rev = OMAP3430_REV_ES2_0; |
| 157 | rev_name = "ES2.0"; |
| 158 | break; |
| 159 | case 2: |
| 160 | system_rev = OMAP3430_REV_ES2_1; |
| 161 | rev_name = "ES2.1"; |
| 162 | break; |
| 163 | case 3: |
| 164 | system_rev = OMAP3430_REV_ES3_0; |
| 165 | rev_name = "ES3.0"; |
| 166 | break; |
| 167 | default: |
| 168 | /* Use the latest known revision as default */ |
| 169 | system_rev = OMAP3430_REV_ES3_0; |
| 170 | rev_name = "Unknown revision\n"; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | out: |
| 175 | pr_info("OMAP%04x %s\n", system_rev >> 16, rev_name); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Try to detect the exact revision of the omap we're running on |
| 180 | */ |
Tony Lindgren | 5ba02dc | 2008-12-10 17:36:30 -0800 | [diff] [blame] | 181 | void __init omap2_check_revision(void) |
| 182 | { |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 183 | /* |
| 184 | * At this point we have an idea about the processor revision set |
| 185 | * earlier with omap2_set_globals_tap(). |
| 186 | */ |
| 187 | if (cpu_is_omap24xx()) |
| 188 | omap24xx_check_revision(); |
| 189 | else if (cpu_is_omap34xx()) |
| 190 | omap34xx_check_revision(); |
| 191 | else |
| 192 | pr_err("OMAP revision unknown, please fix!\n"); |
| 193 | |
| 194 | /* |
| 195 | * OK, now we know the exact revision. Initialize omap_chip bits |
| 196 | * for powerdowmain and clockdomain code. |
| 197 | */ |
| 198 | if (cpu_is_omap243x()) { |
| 199 | /* Currently only supports 2430ES2.1 and 2430-all */ |
| 200 | omap_chip.oc |= CHIP_IS_OMAP2430; |
| 201 | } else if (cpu_is_omap242x()) { |
| 202 | /* Currently only supports 2420ES2.1.1 and 2420-all */ |
| 203 | omap_chip.oc |= CHIP_IS_OMAP2420; |
| 204 | } else if (cpu_is_omap343x()) { |
| 205 | omap_chip.oc = CHIP_IS_OMAP3430; |
| 206 | if (system_rev == OMAP3430_REV_ES1_0) |
| 207 | omap_chip.oc |= CHIP_IS_OMAP3430ES1; |
| 208 | else if (system_rev > OMAP3430_REV_ES1_0) |
| 209 | omap_chip.oc |= CHIP_IS_OMAP3430ES2; |
| 210 | } else { |
| 211 | pr_err("Uninitialized omap_chip, please fix!\n"); |
| 212 | } |
Tony Lindgren | 5ba02dc | 2008-12-10 17:36:30 -0800 | [diff] [blame] | 213 | } |
| 214 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 215 | /* |
| 216 | * Set up things for map_io and processor detection later on. Gets called |
| 217 | * pretty much first thing from board init. For multi-omap, this gets |
| 218 | * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to |
| 219 | * detect the exact revision later on in omap2_detect_revision() once map_io |
| 220 | * is done. |
| 221 | */ |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 222 | void __init omap2_set_globals_tap(struct omap_globals *omap2_globals) |
| 223 | { |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 224 | system_rev = omap2_globals->class; |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 225 | tap_base = omap2_globals->tap; |
| 226 | |
Tony Lindgren | a882314 | 2008-12-10 17:36:30 -0800 | [diff] [blame^] | 227 | if (cpu_is_omap34xx()) |
Tony Lindgren | 0e56484 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 228 | tap_prod_id = 0x0210; |
| 229 | else |
| 230 | tap_prod_id = 0x0208; |
| 231 | } |