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56d8b96cbc
few changes to drivers, no kernel config was added. As the SoCs are quite old and the code is unmaintained start the process of removing support by deleting the header file and code that depends on it along with the macro SOC_OMAP3. Other Ti SoCs shouldn't be affected, other than for us to have less code to maintain. Differential Revision: https://reviews.freebsd.org/D936 Reviewed by: rpaulo, loos
266 lines
6.9 KiB
C
266 lines
6.9 KiB
C
/*-
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* Copyright (c) 2011
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* Ben Gray <ben.r.gray@gmail.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <arm/ti/tivar.h>
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#include <arm/ti/ti_cpuid.h>
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#include <arm/ti/omap4/omap4_reg.h>
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#include <arm/ti/am335x/am335x_reg.h>
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#define OMAP4_STD_FUSE_DIE_ID_0 0x2200
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#define OMAP4_ID_CODE 0x2204
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#define OMAP4_STD_FUSE_DIE_ID_1 0x2208
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#define OMAP4_STD_FUSE_DIE_ID_2 0x220C
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#define OMAP4_STD_FUSE_DIE_ID_3 0x2210
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#define OMAP4_STD_FUSE_PROD_ID_0 0x2214
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#define OMAP4_STD_FUSE_PROD_ID_1 0x2218
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#define OMAP3_ID_CODE 0xA204
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static uint32_t chip_revision = 0xffffffff;
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/**
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* ti_revision - Returns the revision number of the device
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*
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* Simply returns an identifier for the revision of the chip we are running
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* on.
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*
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* RETURNS
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* A 32-bit identifier for the current chip
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*/
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uint32_t
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ti_revision(void)
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{
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return chip_revision;
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}
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/**
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* omap4_get_revision - determines omap4 revision
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*
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* Reads the registers to determine the revision of the chip we are currently
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* running on. Stores the information in global variables.
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*
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*
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*/
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static void
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omap4_get_revision(void)
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{
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uint32_t id_code;
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uint32_t revision;
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uint32_t hawkeye;
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bus_space_handle_t bsh;
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/* The chip revsion is read from the device identification registers and
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* the JTAG (?) tap registers, which are located in address 0x4A00_2200 to
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* 0x4A00_2218. This is part of the L4_CORE memory range and should have
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* been mapped in by the machdep.c code.
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*
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* STD_FUSE_DIE_ID_0 0x4A00 2200
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* ID_CODE 0x4A00 2204 (this is the only one we need)
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* STD_FUSE_DIE_ID_1 0x4A00 2208
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* STD_FUSE_DIE_ID_2 0x4A00 220C
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* STD_FUSE_DIE_ID_3 0x4A00 2210
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* STD_FUSE_PROD_ID_0 0x4A00 2214
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* STD_FUSE_PROD_ID_1 0x4A00 2218
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*/
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/* FIXME Should we map somewhere else? */
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bus_space_map(fdtbus_bs_tag,OMAP44XX_L4_CORE_HWBASE, 0x4000, 0, &bsh);
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id_code = bus_space_read_4(fdtbus_bs_tag, bsh, OMAP4_ID_CODE);
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bus_space_unmap(fdtbus_bs_tag, bsh, 0x4000);
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hawkeye = ((id_code >> 12) & 0xffff);
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revision = ((id_code >> 28) & 0xf);
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/* Apparently according to the linux code there were some ES2.0 samples that
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* have the wrong id code and report themselves as ES1.0 silicon. So used
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* the ARM cpuid to get the correct revision.
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*/
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if (revision == 0) {
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id_code = cpufunc_id();
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revision = (id_code & 0xf) - 1;
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}
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switch (hawkeye) {
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case 0xB852:
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switch (revision) {
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case 0:
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chip_revision = OMAP4430_REV_ES1_0;
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break;
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case 1:
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chip_revision = OMAP4430_REV_ES2_1;
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break;
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default:
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chip_revision = OMAP4430_REV_UNKNOWN;
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break;
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}
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break;
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case 0xB95C:
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switch (revision) {
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case 3:
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chip_revision = OMAP4430_REV_ES2_1;
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break;
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case 4:
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chip_revision = OMAP4430_REV_ES2_2;
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break;
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case 6:
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chip_revision = OMAP4430_REV_ES2_3;
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break;
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default:
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chip_revision = OMAP4430_REV_UNKNOWN;
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break;
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}
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break;
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case 0xB94E:
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switch (revision) {
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case 0:
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chip_revision = OMAP4460_REV_ES1_0;
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break;
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case 2:
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chip_revision = OMAP4460_REV_ES1_1;
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break;
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default:
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chip_revision = OMAP4460_REV_UNKNOWN;
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break;
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}
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break;
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case 0xB975:
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switch (revision) {
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case 0:
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chip_revision = OMAP4470_REV_ES1_0;
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break;
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default:
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chip_revision = OMAP4470_REV_UNKNOWN;
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break;
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}
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break;
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default:
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/* Default to the latest revision if we can't determine type */
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chip_revision = OMAP_UNKNOWN_DEV;
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break;
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}
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if (chip_revision != OMAP_UNKNOWN_DEV) {
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printf("Texas Instruments OMAP%04x Processor, Revision ES%u.%u\n",
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OMAP_REV_DEVICE(chip_revision), OMAP_REV_MAJOR(chip_revision),
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OMAP_REV_MINOR(chip_revision));
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}
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else {
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printf("Texas Instruments unknown OMAP chip: %04x, rev %d\n",
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hawkeye, revision);
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}
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}
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static void
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am335x_get_revision(void)
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{
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uint32_t dev_feature;
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uint8_t cpu_last_char;
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bus_space_handle_t bsh;
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bus_space_map(fdtbus_bs_tag, AM335X_CONTROL_BASE, AM335X_CONTROL_SIZE, 0, &bsh);
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chip_revision = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEVICE_ID);
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dev_feature = bus_space_read_4(fdtbus_bs_tag, bsh, AM335X_CONTROL_DEV_FEATURE);
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bus_space_unmap(fdtbus_bs_tag, bsh, AM335X_CONTROL_SIZE);
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switch (dev_feature) {
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case 0x00FF0382:
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cpu_last_char='2';
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break;
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case 0x20FF0382:
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cpu_last_char='4';
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break;
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case 0x00FF0383:
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cpu_last_char='6';
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break;
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case 0x00FE0383:
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cpu_last_char='7';
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break;
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case 0x20FF0383:
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cpu_last_char='8';
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break;
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case 0x20FE0383:
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cpu_last_char='9';
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break;
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default:
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cpu_last_char='x';
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}
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printf("Texas Instruments AM335%c Processor, Revision ES1.%u\n",
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cpu_last_char, AM335X_DEVREV(chip_revision));
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}
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/**
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* ti_cpu_ident - attempts to identify the chip we are running on
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* @dummy: ignored
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*
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* This function is called before any of the driver are initialised, however
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* the basic virt to phys maps have been setup in machdep.c so we can still
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* access the required registers, we just have to use direct register reads
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* and writes rather than going through the bus stuff.
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*
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*
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*/
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static void
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ti_cpu_ident(void *dummy)
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{
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switch(ti_chip()) {
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case CHIP_OMAP_4:
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omap4_get_revision();
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break;
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case CHIP_AM335X:
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am335x_get_revision();
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break;
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default:
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panic("Unknown chip type, fixme!\n");
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}
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}
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SYSINIT(ti_cpu_ident, SI_SUB_CPU, SI_ORDER_SECOND, ti_cpu_ident, NULL);
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