718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 Ian Lepore
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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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*
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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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_platform.h"
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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/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/ti_hwmods.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_cpu.h>
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#include <dev/uart/uart_cpu_fdt.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_dev_ns8250.h>
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#include "uart_if.h"
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/*
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* High-level UART interface.
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*/
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struct ti8250_softc {
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struct ns8250_softc ns8250_base;
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/*uint32_t mystuff;*/
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};
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#define MDR1_REG 8
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#define MDR1_MODE_UART 0
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#define MDR1_MODE_DISABLE 7
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#define SYSCC_REG 15
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#define SYSCC_SOFTRESET (1 << 1)
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#define SYSS_REG 16
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#define SYSS_STATUS_RESETDONE (1 << 0)
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static int
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ti8250_bus_probe(struct uart_softc *sc)
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{
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int status;
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clk_ident_t clkid;
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/* Enable clocks for this device. We can't continue if that fails. */
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clkid = ti_hwmods_get_clock(sc->sc_dev);
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if (clkid == INVALID_CLK_IDENT) {
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device_printf(sc->sc_dev,
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"failed to get clock based on hwmods\n");
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clkid = UART1_CLK + device_get_unit(sc->sc_dev);
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}
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if ((status = ti_prcm_clk_enable(clkid)) != 0)
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return (status);
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/*
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* Set the hardware to disabled mode, do a full device reset, then set
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* it to uart mode. Most devices will be reset-and-disabled already,
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* but you never know what a bootloader might have done.
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*/
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uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_DISABLE);
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uart_setreg(&sc->sc_bas, SYSCC_REG, SYSCC_SOFTRESET);
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while (uart_getreg(&sc->sc_bas, SYSS_REG) & SYSS_STATUS_RESETDONE)
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continue;
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uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_UART);
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status = ns8250_bus_probe(sc);
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if (status == 0)
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device_set_desc(sc->sc_dev, "TI UART (16550 compatible)");
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return (status);
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}
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static kobj_method_t ti8250_methods[] = {
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KOBJMETHOD(uart_probe, ti8250_bus_probe),
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KOBJMETHOD(uart_attach, ns8250_bus_attach),
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KOBJMETHOD(uart_detach, ns8250_bus_detach),
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KOBJMETHOD(uart_flush, ns8250_bus_flush),
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KOBJMETHOD(uart_getsig, ns8250_bus_getsig),
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KOBJMETHOD(uart_ioctl, ns8250_bus_ioctl),
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KOBJMETHOD(uart_ipend, ns8250_bus_ipend),
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KOBJMETHOD(uart_param, ns8250_bus_param),
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KOBJMETHOD(uart_receive, ns8250_bus_receive),
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KOBJMETHOD(uart_setsig, ns8250_bus_setsig),
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KOBJMETHOD(uart_transmit, ns8250_bus_transmit),
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KOBJMETHOD_END
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};
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static struct uart_class uart_ti8250_class = {
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"ti8250",
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ti8250_methods,
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sizeof(struct ti8250_softc),
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.uc_ops = &uart_ns8250_ops,
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.uc_range = 0x88,
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.uc_rclk = 48000000,
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.uc_rshift = 2
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};
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static struct ofw_compat_data compat_data[] = {
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{"ti,ns16550", (uintptr_t)&uart_ti8250_class},
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{"ti,omap3-uart", (uintptr_t)&uart_ti8250_class},
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{"ti,omap4-uart", (uintptr_t)&uart_ti8250_class},
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{NULL, (uintptr_t)NULL},
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};
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UART_FDT_CLASS_AND_DEVICE(compat_data);
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