1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 5 * Ben Gray <ben.r.gray@gmail.com>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/resource.h> 39 #include <sys/rman.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 43 #include <machine/bus.h> 44 #include <machine/fdt.h> 45 #include <machine/resource.h> 46 #include <machine/intr.h> 47 48 #include <dev/fdt/simplebus.h> 49 #include <dev/fdt/fdt_common.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 52 #include <arm/ti/tivar.h> 53 #include <arm/ti/ti_cpuid.h> 54 55 #include <arm/ti/omap4/omap4_reg.h> 56 #include <arm/ti/am335x/am335x_reg.h> 57 58 #define OMAP4_STD_FUSE_DIE_ID_0 0x2200 59 #define OMAP4_ID_CODE 0x2204 60 #define OMAP4_STD_FUSE_DIE_ID_1 0x2208 61 #define OMAP4_STD_FUSE_DIE_ID_2 0x220C 62 #define OMAP4_STD_FUSE_DIE_ID_3 0x2210 63 #define OMAP4_STD_FUSE_PROD_ID_0 0x2214 64 #define OMAP4_STD_FUSE_PROD_ID_1 0x2218 65 66 #define OMAP3_ID_CODE 0xA204 67 68 static uint32_t chip_revision = 0xffffffff; 69 70 /** 71 * ti_revision - Returns the revision number of the device 72 * 73 * Simply returns an identifier for the revision of the chip we are running 74 * on. 75 * 76 * RETURNS 77 * A 32-bit identifier for the current chip 78 */ 79 uint32_t 80 ti_revision(void) 81 { 82 return chip_revision; 83 } 84 85 /** 86 * omap4_get_revision - determines omap4 revision 87 * 88 * Reads the registers to determine the revision of the chip we are currently 89 * running on. Stores the information in global variables. 90 * 91 * 92 */ 93 static void 94 omap4_get_revision(void) 95 { 96 uint32_t id_code; 97 uint32_t revision; 98 uint32_t hawkeye; 99 bus_space_handle_t bsh; 100 101 /* The chip revsion is read from the device identification registers and 102 * the JTAG (?) tap registers, which are located in address 0x4A00_2200 to 103 * 0x4A00_2218. This is part of the L4_CORE memory range and should have 104 * been mapped in by the machdep.c code. 105 * 106 * STD_FUSE_DIE_ID_0 0x4A00 2200 107 * ID_CODE 0x4A00 2204 (this is the only one we need) 108 * STD_FUSE_DIE_ID_1 0x4A00 2208 109 * STD_FUSE_DIE_ID_2 0x4A00 220C 110 * STD_FUSE_DIE_ID_3 0x4A00 2210 111 * STD_FUSE_PROD_ID_0 0x4A00 2214 112 * STD_FUSE_PROD_ID_1 0x4A00 2218 113 */ 114 /* FIXME Should we map somewhere else? */ 115 bus_space_map(fdtbus_bs_tag,OMAP44XX_L4_CORE_HWBASE, 0x4000, 0, &bsh); 116 id_code = bus_space_read_4(fdtbus_bs_tag, bsh, OMAP4_ID_CODE); 117 bus_space_unmap(fdtbus_bs_tag, bsh, 0x4000); 118 119 hawkeye = ((id_code >> 12) & 0xffff); 120 revision = ((id_code >> 28) & 0xf); 121 122 /* Apparently according to the linux code there were some ES2.0 samples that 123 * have the wrong id code and report themselves as ES1.0 silicon. So used 124 * the ARM cpuid to get the correct revision. 125 */ 126 if (revision == 0) { 127 id_code = cpu_ident(); 128 revision = (id_code & 0xf) - 1; 129 } 130 131 switch (hawkeye) { 132 case 0xB852: 133 switch (revision) { 134 case 0: 135 chip_revision = OMAP4430_REV_ES1_0; 136 break; 137 case 1: 138 chip_revision = OMAP4430_REV_ES2_1; 139 break; 140 default: 141 chip_revision = OMAP4430_REV_UNKNOWN; 142 break; 143 } 144 break; 145 146 case 0xB95C: 147 switch (revision) { 148 case 3: 149 chip_revision = OMAP4430_REV_ES2_1; 150 break; 151 case 4: 152 chip_revision = OMAP4430_REV_ES2_2; 153 break; 154 case 6: 155 chip_revision = OMAP4430_REV_ES2_3; 156 break; 157 default: 158 chip_revision = OMAP4430_REV_UNKNOWN; 159 break; 160 } 161 break; 162 163 case 0xB94E: 164 switch (revision) { 165 case 0: 166 chip_revision = OMAP4460_REV_ES1_0; 167 break; 168 case 2: 169 chip_revision = OMAP4460_REV_ES1_1; 170 break; 171 default: 172 chip_revision = OMAP4460_REV_UNKNOWN; 173 break; 174 } 175 break; 176 177 case 0xB975: 178 switch (revision) { 179 case 0: 180 chip_revision = OMAP4470_REV_ES1_0; 181 break; 182 default: 183 chip_revision = OMAP4470_REV_UNKNOWN; 184 break; 185 } 186 break; 187 188 default: 189 /* Default to the latest revision if we can't determine type */ 190 chip_revision = OMAP_UNKNOWN_DEV; 191 break; 192 } 193 if (chip_revision != OMAP_UNKNOWN_DEV) { 194 printf("Texas Instruments OMAP%04x Processor, Revision ES%u.%u\n", 195 OMAP_REV_DEVICE(chip_revision), OMAP_REV_MAJOR(chip_revision), 196 OMAP_REV_MINOR(chip_revision)); 197 } 198 else { 199 printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n", 200 hawkeye, revision); 201 } 202 } 203 204 static void 205 am335x_get_revision(void) 206 { 207 uint32_t dev_feature; 208 char cpu_last_char; 209 bus_space_handle_t bsh; 210 int major; 211 int minor; 212 213 bus_space_map(fdtbus_bs_tag, AM335X_CONTROL_BASE, AM335X_CONTROL_SIZE, 0, &bsh); 214 chip_revision = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEVICE_ID); 215 dev_feature = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEV_FEATURE); 216 bus_space_unmap(fdtbus_bs_tag, bsh, AM335X_CONTROL_SIZE); 217 218 switch (dev_feature) { 219 case 0x00FF0382: 220 cpu_last_char='2'; 221 break; 222 case 0x20FF0382: 223 cpu_last_char='4'; 224 break; 225 case 0x00FF0383: 226 cpu_last_char='6'; 227 break; 228 case 0x00FE0383: 229 cpu_last_char='7'; 230 break; 231 case 0x20FF0383: 232 cpu_last_char='8'; 233 break; 234 case 0x20FE0383: 235 cpu_last_char='9'; 236 break; 237 default: 238 cpu_last_char='x'; 239 } 240 241 switch(AM335X_DEVREV(chip_revision)) { 242 case 0: 243 major = 1; 244 minor = 0; 245 break; 246 case 1: 247 major = 2; 248 minor = 0; 249 break; 250 case 2: 251 major = 2; 252 minor = 1; 253 break; 254 default: 255 major = 0; 256 minor = AM335X_DEVREV(chip_revision); 257 break; 258 } 259 printf("Texas Instruments AM335%c Processor, Revision ES%u.%u\n", 260 cpu_last_char, major, minor); 261 } 262 263 /** 264 * ti_cpu_ident - attempts to identify the chip we are running on 265 * @dummy: ignored 266 * 267 * This function is called before any of the driver are initialised, however 268 * the basic virt to phys maps have been setup in machdep.c so we can still 269 * access the required registers, we just have to use direct register reads 270 * and writes rather than going through the bus stuff. 271 * 272 * 273 */ 274 static void 275 ti_cpu_ident(void *dummy) 276 { 277 if (!ti_soc_is_supported()) 278 return; 279 switch(ti_chip()) { 280 case CHIP_OMAP_4: 281 omap4_get_revision(); 282 break; 283 case CHIP_AM335X: 284 am335x_get_revision(); 285 break; 286 default: 287 panic("Unknown chip type, fixme!\n"); 288 } 289 } 290 291 SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL); 292