/*- * Copyright (c) 2011 * Ben Gray . * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define OMAP4_STD_FUSE_DIE_ID_0 0x2200 #define OMAP4_ID_CODE 0x2204 #define OMAP4_STD_FUSE_DIE_ID_1 0x2208 #define OMAP4_STD_FUSE_DIE_ID_2 0x220C #define OMAP4_STD_FUSE_DIE_ID_3 0x2210 #define OMAP4_STD_FUSE_PROD_ID_0 0x2214 #define OMAP4_STD_FUSE_PROD_ID_1 0x2218 #define OMAP3_ID_CODE 0xA204 static uint32_t chip_revision = 0xffffffff; /** * ti_revision - Returns the revision number of the device * * Simply returns an identifier for the revision of the chip we are running * on. * * RETURNS * A 32-bit identifier for the current chip */ uint32_t ti_revision(void) { return chip_revision; } /** * omap4_get_revision - determines omap4 revision * * Reads the registers to determine the revision of the chip we are currently * running on. Stores the information in global variables. * * */ static void omap4_get_revision(void) { uint32_t id_code; uint32_t revision; uint32_t hawkeye; bus_space_handle_t bsh; /* The chip revsion is read from the device identification registers and * the JTAG (?) tap registers, which are located in address 0x4A00_2200 to * 0x4A00_2218. This is part of the L4_CORE memory range and should have * been mapped in by the machdep.c code. * * STD_FUSE_DIE_ID_0 0x4A00 2200 * ID_CODE 0x4A00 2204 (this is the only one we need) * STD_FUSE_DIE_ID_1 0x4A00 2208 * STD_FUSE_DIE_ID_2 0x4A00 220C * STD_FUSE_DIE_ID_3 0x4A00 2210 * STD_FUSE_PROD_ID_0 0x4A00 2214 * STD_FUSE_PROD_ID_1 0x4A00 2218 */ /* FIXME Should we map somewhere else? */ bus_space_map(fdtbus_bs_tag,OMAP44XX_L4_CORE_HWBASE, 0x4000, 0, &bsh); id_code = bus_space_read_4(fdtbus_bs_tag, bsh, OMAP4_ID_CODE); bus_space_unmap(fdtbus_bs_tag, bsh, 0x4000); hawkeye = ((id_code >> 12) & 0xffff); revision = ((id_code >> 28) & 0xf); /* Apparently according to the linux code there were some ES2.0 samples that * have the wrong id code and report themselves as ES1.0 silicon. So used * the ARM cpuid to get the correct revision. */ if (revision == 0) { id_code = cpu_ident(); revision = (id_code & 0xf) - 1; } switch (hawkeye) { case 0xB852: switch (revision) { case 0: chip_revision = OMAP4430_REV_ES1_0; break; case 1: chip_revision = OMAP4430_REV_ES2_1; break; default: chip_revision = OMAP4430_REV_UNKNOWN; break; } break; case 0xB95C: switch (revision) { case 3: chip_revision = OMAP4430_REV_ES2_1; break; case 4: chip_revision = OMAP4430_REV_ES2_2; break; case 6: chip_revision = OMAP4430_REV_ES2_3; break; default: chip_revision = OMAP4430_REV_UNKNOWN; break; } break; case 0xB94E: switch (revision) { case 0: chip_revision = OMAP4460_REV_ES1_0; break; case 2: chip_revision = OMAP4460_REV_ES1_1; break; default: chip_revision = OMAP4460_REV_UNKNOWN; break; } break; case 0xB975: switch (revision) { case 0: chip_revision = OMAP4470_REV_ES1_0; break; default: chip_revision = OMAP4470_REV_UNKNOWN; break; } break; default: /* Default to the latest revision if we can't determine type */ chip_revision = OMAP_UNKNOWN_DEV; break; } if (chip_revision != OMAP_UNKNOWN_DEV) { printf("Texas Instruments OMAP%04x Processor, Revision ES%u.%u\n", OMAP_REV_DEVICE(chip_revision), OMAP_REV_MAJOR(chip_revision), OMAP_REV_MINOR(chip_revision)); } else { printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n", hawkeye, revision); } } static void am335x_get_revision(void) { uint32_t dev_feature; char cpu_last_char; bus_space_handle_t bsh; int major; int minor; bus_space_map(fdtbus_bs_tag, AM335X_CONTROL_BASE, AM335X_CONTROL_SIZE, 0, &bsh); chip_revision = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEVICE_ID); dev_feature = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEV_FEATURE); bus_space_unmap(fdtbus_bs_tag, bsh, AM335X_CONTROL_SIZE); switch (dev_feature) { case 0x00FF0382: cpu_last_char='2'; break; case 0x20FF0382: cpu_last_char='4'; break; case 0x00FF0383: cpu_last_char='6'; break; case 0x00FE0383: cpu_last_char='7'; break; case 0x20FF0383: cpu_last_char='8'; break; case 0x20FE0383: cpu_last_char='9'; break; default: cpu_last_char='x'; } switch(AM335X_DEVREV(chip_revision)) { case 0: major = 1; minor = 0; break; case 1: major = 2; minor = 0; break; case 2: major = 2; minor = 1; break; default: major = 0; minor = AM335X_DEVREV(chip_revision); break; } printf("Texas Instruments AM335%c Processor, Revision ES%u.%u\n", cpu_last_char, major, minor); } /** * ti_cpu_ident - attempts to identify the chip we are running on * @dummy: ignored * * This function is called before any of the driver are initialised, however * the basic virt to phys maps have been setup in machdep.c so we can still * access the required registers, we just have to use direct register reads * and writes rather than going through the bus stuff. * * */ static void ti_cpu_ident(void *dummy) { switch(ti_chip()) { case CHIP_OMAP_4: omap4_get_revision(); break; case CHIP_AM335X: am335x_get_revision(); break; default: panic("Unknown chip type, fixme!\n"); } } SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL);