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/cpu.h> 45 #include <machine/fdt.h> 46 #include <machine/resource.h> 47 #include <machine/intr.h> 48 49 #include <dev/fdt/simplebus.h> 50 #include <dev/fdt/fdt_common.h> 51 #include <dev/ofw/ofw_bus_subr.h> 52 53 #include <arm/ti/tivar.h> 54 #include <arm/ti/ti_cpuid.h> 55 56 #include <arm/ti/omap4/omap4_reg.h> 57 #include <arm/ti/am335x/am335x_reg.h> 58 59 #define OMAP4_STD_FUSE_DIE_ID_0 0x2200 60 #define OMAP4_ID_CODE 0x2204 61 #define OMAP4_STD_FUSE_DIE_ID_1 0x2208 62 #define OMAP4_STD_FUSE_DIE_ID_2 0x220C 63 #define OMAP4_STD_FUSE_DIE_ID_3 0x2210 64 #define OMAP4_STD_FUSE_PROD_ID_0 0x2214 65 #define OMAP4_STD_FUSE_PROD_ID_1 0x2218 66 67 #define OMAP3_ID_CODE 0xA204 68 69 static uint32_t chip_revision = 0xffffffff; 70 71 /** 72 * ti_revision - Returns the revision number of the device 73 * 74 * Simply returns an identifier for the revision of the chip we are running 75 * on. 76 * 77 * RETURNS 78 * A 32-bit identifier for the current chip 79 */ 80 uint32_t 81 ti_revision(void) 82 { 83 return chip_revision; 84 } 85 86 /** 87 * omap4_get_revision - determines omap4 revision 88 * 89 * Reads the registers to determine the revision of the chip we are currently 90 * running on. Stores the information in global variables. 91 * 92 * 93 */ 94 static void 95 omap4_get_revision(void) 96 { 97 uint32_t id_code; 98 uint32_t revision; 99 uint32_t hawkeye; 100 bus_space_handle_t bsh; 101 102 /* The chip revsion is read from the device identification registers and 103 * the JTAG (?) tap registers, which are located in address 0x4A00_2200 to 104 * 0x4A00_2218. This is part of the L4_CORE memory range and should have 105 * been mapped in by the machdep.c code. 106 * 107 * STD_FUSE_DIE_ID_0 0x4A00 2200 108 * ID_CODE 0x4A00 2204 (this is the only one we need) 109 * STD_FUSE_DIE_ID_1 0x4A00 2208 110 * STD_FUSE_DIE_ID_2 0x4A00 220C 111 * STD_FUSE_DIE_ID_3 0x4A00 2210 112 * STD_FUSE_PROD_ID_0 0x4A00 2214 113 * STD_FUSE_PROD_ID_1 0x4A00 2218 114 */ 115 /* FIXME Should we map somewhere else? */ 116 bus_space_map(fdtbus_bs_tag,OMAP44XX_L4_CORE_HWBASE, 0x4000, 0, &bsh); 117 id_code = bus_space_read_4(fdtbus_bs_tag, bsh, OMAP4_ID_CODE); 118 bus_space_unmap(fdtbus_bs_tag, bsh, 0x4000); 119 120 hawkeye = ((id_code >> 12) & 0xffff); 121 revision = ((id_code >> 28) & 0xf); 122 123 /* Apparently according to the linux code there were some ES2.0 samples that 124 * have the wrong id code and report themselves as ES1.0 silicon. So used 125 * the ARM cpuid to get the correct revision. 126 */ 127 if (revision == 0) { 128 id_code = cp15_midr_get(); 129 revision = (id_code & 0xf) - 1; 130 } 131 132 switch (hawkeye) { 133 case 0xB852: 134 switch (revision) { 135 case 0: 136 chip_revision = OMAP4430_REV_ES1_0; 137 break; 138 case 1: 139 chip_revision = OMAP4430_REV_ES2_1; 140 break; 141 default: 142 chip_revision = OMAP4430_REV_UNKNOWN; 143 break; 144 } 145 break; 146 147 case 0xB95C: 148 switch (revision) { 149 case 3: 150 chip_revision = OMAP4430_REV_ES2_1; 151 break; 152 case 4: 153 chip_revision = OMAP4430_REV_ES2_2; 154 break; 155 case 6: 156 chip_revision = OMAP4430_REV_ES2_3; 157 break; 158 default: 159 chip_revision = OMAP4430_REV_UNKNOWN; 160 break; 161 } 162 break; 163 164 case 0xB94E: 165 switch (revision) { 166 case 0: 167 chip_revision = OMAP4460_REV_ES1_0; 168 break; 169 case 2: 170 chip_revision = OMAP4460_REV_ES1_1; 171 break; 172 default: 173 chip_revision = OMAP4460_REV_UNKNOWN; 174 break; 175 } 176 break; 177 178 case 0xB975: 179 switch (revision) { 180 case 0: 181 chip_revision = OMAP4470_REV_ES1_0; 182 break; 183 default: 184 chip_revision = OMAP4470_REV_UNKNOWN; 185 break; 186 } 187 break; 188 189 default: 190 /* Default to the latest revision if we can't determine type */ 191 chip_revision = OMAP_UNKNOWN_DEV; 192 break; 193 } 194 if (chip_revision != OMAP_UNKNOWN_DEV) { 195 printf("Texas Instruments OMAP%04x Processor, Revision ES%u.%u\n", 196 OMAP_REV_DEVICE(chip_revision), OMAP_REV_MAJOR(chip_revision), 197 OMAP_REV_MINOR(chip_revision)); 198 } 199 else { 200 printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n", 201 hawkeye, revision); 202 } 203 } 204 205 static void 206 am335x_get_revision(void) 207 { 208 uint32_t dev_feature; 209 char cpu_last_char; 210 bus_space_handle_t bsh; 211 int major; 212 int minor; 213 214 bus_space_map(fdtbus_bs_tag, AM335X_CONTROL_BASE, AM335X_CONTROL_SIZE, 0, &bsh); 215 chip_revision = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEVICE_ID); 216 dev_feature = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEV_FEATURE); 217 bus_space_unmap(fdtbus_bs_tag, bsh, AM335X_CONTROL_SIZE); 218 219 switch (dev_feature) { 220 case 0x00FF0382: 221 cpu_last_char='2'; 222 break; 223 case 0x20FF0382: 224 cpu_last_char='4'; 225 break; 226 case 0x00FF0383: 227 cpu_last_char='6'; 228 break; 229 case 0x00FE0383: 230 cpu_last_char='7'; 231 break; 232 case 0x20FF0383: 233 cpu_last_char='8'; 234 break; 235 case 0x20FE0383: 236 cpu_last_char='9'; 237 break; 238 default: 239 cpu_last_char='x'; 240 } 241 242 switch(AM335X_DEVREV(chip_revision)) { 243 case 0: 244 major = 1; 245 minor = 0; 246 break; 247 case 1: 248 major = 2; 249 minor = 0; 250 break; 251 case 2: 252 major = 2; 253 minor = 1; 254 break; 255 default: 256 major = 0; 257 minor = AM335X_DEVREV(chip_revision); 258 break; 259 } 260 printf("Texas Instruments AM335%c Processor, Revision ES%u.%u\n", 261 cpu_last_char, major, minor); 262 } 263 264 /** 265 * ti_cpu_ident - attempts to identify the chip we are running on 266 * @dummy: ignored 267 * 268 * This function is called before any of the driver are initialised, however 269 * the basic virt to phys maps have been setup in machdep.c so we can still 270 * access the required registers, we just have to use direct register reads 271 * and writes rather than going through the bus stuff. 272 * 273 * 274 */ 275 static void 276 ti_cpu_ident(void *dummy) 277 { 278 if (!ti_soc_is_supported()) 279 return; 280 switch(ti_chip()) { 281 case CHIP_OMAP_4: 282 omap4_get_revision(); 283 break; 284 case CHIP_AM335X: 285 am335x_get_revision(); 286 break; 287 default: 288 panic("Unknown chip type, fixme!\n"); 289 } 290 } 291 292 SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL); 293