3 * Ben Gray <ben.r.gray@gmail.com>.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
36 #include <sys/resource.h>
39 #include <sys/mutex.h>
41 #include <machine/bus.h>
42 #include <machine/fdt.h>
43 #include <machine/resource.h>
44 #include <machine/intr.h>
46 #include <arm/ti/tivar.h>
47 #include <arm/ti/ti_cpuid.h>
49 #include <arm/ti/omap4/omap4_reg.h>
50 #include <arm/ti/am335x/am335x_reg.h>
52 #define OMAP4_STD_FUSE_DIE_ID_0 0x2200
53 #define OMAP4_ID_CODE 0x2204
54 #define OMAP4_STD_FUSE_DIE_ID_1 0x2208
55 #define OMAP4_STD_FUSE_DIE_ID_2 0x220C
56 #define OMAP4_STD_FUSE_DIE_ID_3 0x2210
57 #define OMAP4_STD_FUSE_PROD_ID_0 0x2214
58 #define OMAP4_STD_FUSE_PROD_ID_1 0x2218
60 #define OMAP3_ID_CODE 0xA204
62 static uint32_t chip_revision = 0xffffffff;
65 * ti_revision - Returns the revision number of the device
67 * Simply returns an identifier for the revision of the chip we are running
71 * A 32-bit identifier for the current chip
80 * omap4_get_revision - determines omap4 revision
82 * Reads the registers to determine the revision of the chip we are currently
83 * running on. Stores the information in global variables.
88 omap4_get_revision(void)
93 bus_space_handle_t bsh;
95 /* The chip revsion is read from the device identification registers and
96 * the JTAG (?) tap registers, which are located in address 0x4A00_2200 to
97 * 0x4A00_2218. This is part of the L4_CORE memory range and should have
98 * been mapped in by the machdep.c code.
100 * STD_FUSE_DIE_ID_0 0x4A00 2200
101 * ID_CODE 0x4A00 2204 (this is the only one we need)
102 * STD_FUSE_DIE_ID_1 0x4A00 2208
103 * STD_FUSE_DIE_ID_2 0x4A00 220C
104 * STD_FUSE_DIE_ID_3 0x4A00 2210
105 * STD_FUSE_PROD_ID_0 0x4A00 2214
106 * STD_FUSE_PROD_ID_1 0x4A00 2218
108 /* FIXME Should we map somewhere else? */
109 bus_space_map(fdtbus_bs_tag,OMAP44XX_L4_CORE_HWBASE, 0x4000, 0, &bsh);
110 id_code = bus_space_read_4(fdtbus_bs_tag, bsh, OMAP4_ID_CODE);
111 bus_space_unmap(fdtbus_bs_tag, bsh, 0x4000);
113 hawkeye = ((id_code >> 12) & 0xffff);
114 revision = ((id_code >> 28) & 0xf);
116 /* Apparently according to the linux code there were some ES2.0 samples that
117 * have the wrong id code and report themselves as ES1.0 silicon. So used
118 * the ARM cpuid to get the correct revision.
121 id_code = cpu_ident();
122 revision = (id_code & 0xf) - 1;
129 chip_revision = OMAP4430_REV_ES1_0;
132 chip_revision = OMAP4430_REV_ES2_1;
135 chip_revision = OMAP4430_REV_UNKNOWN;
143 chip_revision = OMAP4430_REV_ES2_1;
146 chip_revision = OMAP4430_REV_ES2_2;
149 chip_revision = OMAP4430_REV_ES2_3;
152 chip_revision = OMAP4430_REV_UNKNOWN;
160 chip_revision = OMAP4460_REV_ES1_0;
163 chip_revision = OMAP4460_REV_ES1_1;
166 chip_revision = OMAP4460_REV_UNKNOWN;
174 chip_revision = OMAP4470_REV_ES1_0;
177 chip_revision = OMAP4470_REV_UNKNOWN;
183 /* Default to the latest revision if we can't determine type */
184 chip_revision = OMAP_UNKNOWN_DEV;
187 if (chip_revision != OMAP_UNKNOWN_DEV) {
188 printf("Texas Instruments OMAP%04x Processor, Revision ES%u.%u\n",
189 OMAP_REV_DEVICE(chip_revision), OMAP_REV_MAJOR(chip_revision),
190 OMAP_REV_MINOR(chip_revision));
193 printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n",
199 am335x_get_revision(void)
201 uint32_t dev_feature;
202 uint8_t cpu_last_char;
203 bus_space_handle_t bsh;
205 bus_space_map(fdtbus_bs_tag, AM335X_CONTROL_BASE, AM335X_CONTROL_SIZE, 0, &bsh);
206 chip_revision = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEVICE_ID);
207 dev_feature = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEV_FEATURE);
208 bus_space_unmap(fdtbus_bs_tag, bsh, AM335X_CONTROL_SIZE);
210 switch (dev_feature) {
233 printf("Texas Instruments AM335%c Processor, Revision ES1.%u\n",
234 cpu_last_char, AM335X_DEVREV(chip_revision));
238 * ti_cpu_ident - attempts to identify the chip we are running on
241 * This function is called before any of the driver are initialised, however
242 * the basic virt to phys maps have been setup in machdep.c so we can still
243 * access the required registers, we just have to use direct register reads
244 * and writes rather than going through the bus stuff.
249 ti_cpu_ident(void *dummy)
253 omap4_get_revision();
256 am335x_get_revision();
259 panic("Unknown chip type, fixme!\n");
263 SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL);