2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 * Ben Gray <ben.r.gray@gmail.com>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
38 #include <sys/resource.h>
41 #include <sys/mutex.h>
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>
49 #include <dev/fdt/simplebus.h>
50 #include <dev/fdt/fdt_common.h>
51 #include <dev/ofw/ofw_bus_subr.h>
53 #include <arm/ti/tivar.h>
54 #include <arm/ti/ti_cpuid.h>
56 #include <arm/ti/omap4/omap4_reg.h>
57 #include <arm/ti/am335x/am335x_reg.h>
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
67 #define OMAP3_ID_CODE 0xA204
69 static uint32_t chip_revision = 0xffffffff;
72 * ti_revision - Returns the revision number of the device
74 * Simply returns an identifier for the revision of the chip we are running
78 * A 32-bit identifier for the current chip
87 * omap4_get_revision - determines omap4 revision
89 * Reads the registers to determine the revision of the chip we are currently
90 * running on. Stores the information in global variables.
95 omap4_get_revision(void)
100 bus_space_handle_t bsh;
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.
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
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);
120 hawkeye = ((id_code >> 12) & 0xffff);
121 revision = ((id_code >> 28) & 0xf);
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.
128 id_code = cp15_midr_get();
129 revision = (id_code & 0xf) - 1;
136 chip_revision = OMAP4430_REV_ES1_0;
139 chip_revision = OMAP4430_REV_ES2_1;
142 chip_revision = OMAP4430_REV_UNKNOWN;
150 chip_revision = OMAP4430_REV_ES2_1;
153 chip_revision = OMAP4430_REV_ES2_2;
156 chip_revision = OMAP4430_REV_ES2_3;
159 chip_revision = OMAP4430_REV_UNKNOWN;
167 chip_revision = OMAP4460_REV_ES1_0;
170 chip_revision = OMAP4460_REV_ES1_1;
173 chip_revision = OMAP4460_REV_UNKNOWN;
181 chip_revision = OMAP4470_REV_ES1_0;
184 chip_revision = OMAP4470_REV_UNKNOWN;
190 /* Default to the latest revision if we can't determine type */
191 chip_revision = OMAP_UNKNOWN_DEV;
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));
200 printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n",
206 am335x_get_revision(void)
208 uint32_t dev_feature;
210 bus_space_handle_t bsh;
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);
219 switch (dev_feature) {
242 switch(AM335X_DEVREV(chip_revision)) {
257 minor = AM335X_DEVREV(chip_revision);
260 printf("Texas Instruments AM335%c Processor, Revision ES%u.%u\n",
261 cpu_last_char, major, minor);
265 * ti_cpu_ident - attempts to identify the chip we are running on
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.
276 ti_cpu_ident(void *dummy)
278 if (!ti_soc_is_supported())
282 omap4_get_revision();
285 am335x_get_revision();
288 panic("Unknown chip type, fixme!\n");
292 SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL);