309 lines
7.6 KiB
C
309 lines
7.6 KiB
C
/*-
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* Copyright (c) 2003 Marcel Moolenaar
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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 <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/cons.h>
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#include <sys/tty.h>
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#include <machine/bus.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_bus.h>
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#include <arm/sa11x0/sa11x0_reg.h>
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#include <arm/sa11x0/uart_dev_sa1110.h>
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#include "uart_if.h"
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#define DEFAULT_RCLK 3686400
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extern int got_mmu;
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/*
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* Low-level UART interface.
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*/
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static int sa1110_probe(struct uart_bas *bas);
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static void sa1110_init(struct uart_bas *bas, int, int, int, int);
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static void sa1110_term(struct uart_bas *bas);
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static void sa1110_putc(struct uart_bas *bas, int);
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static int sa1110_poll(struct uart_bas *bas);
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static int sa1110_getc(struct uart_bas *bas, struct mtx *mtx);
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int did_mmu = 0;
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extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
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struct uart_ops uart_sa1110_ops = {
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.probe = sa1110_probe,
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.init = sa1110_init,
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.term = sa1110_term,
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.putc = sa1110_putc,
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.poll = sa1110_poll,
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.getc = sa1110_getc,
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};
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static int
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sa1110_probe(struct uart_bas *bas)
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{
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return (0);
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}
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static void
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sa1110_addr_change(struct uart_bas *bas)
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{
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bas->bsh = SACOM1_VBASE;
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did_mmu = 1;
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}
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static void
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sa1110_init(struct uart_bas *bas, int baudrate, int databits, int stopbits,
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int parity)
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{
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int brd;
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/* XXX: sigh. */
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if (!did_mmu && got_mmu)
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sa1110_addr_change(bas);
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if (bas->rclk == 0)
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bas->rclk = DEFAULT_RCLK;
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while (uart_getreg(bas, SACOM_SR1) & SR1_TBY);
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uart_setreg(bas, SACOM_CR3, 0);
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brd = SACOMSPEED(baudrate);
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uart_setreg(bas, SACOM_CR1, brd >> 8);
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uart_setreg(bas, SACOM_CR2, brd & 0xff);
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uart_setreg(bas, SACOM_CR3, CR3_RXE | CR3_TXE);
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}
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static void
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sa1110_term(struct uart_bas *bas)
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{
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/* XXX */
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}
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static void
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sa1110_putc(struct uart_bas *bas, int c)
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{
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/* XXX: sigh. */
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if (!did_mmu && got_mmu)
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sa1110_addr_change(bas);
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while (!uart_getreg(bas, SACOM_SR1) & SR1_TNF);
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uart_setreg(bas, SACOM_DR, c);
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}
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static int
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sa1110_poll(struct uart_bas *bas)
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{
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/* XXX: sigh. */
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if (!did_mmu && got_mmu)
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sa1110_addr_change(bas);
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if (!(uart_getreg(bas, SACOM_SR1) & SR1_RNE))
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return (-1);
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return (uart_getreg(bas, SACOM_DR) & 0xff);
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}
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static int
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sa1110_getc(struct uart_bas *bas, struct mtx *mtx)
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{
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int c;
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/* XXX: sigh. */
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if (!did_mmu && got_mmu)
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sa1110_addr_change(bas);
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while (!(uart_getreg(bas, SACOM_SR1) & SR1_RNE)) {
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u_int32_t sr0;
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sr0 = uart_getreg(bas, SACOM_SR0);
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if (ISSET(sr0, SR0_RBB))
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uart_setreg(bas, SACOM_SR0, SR0_RBB);
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if (ISSET(sr0, SR0_REB))
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uart_setreg(bas, SACOM_SR0, SR0_REB);
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}
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c = uart_getreg(bas, SACOM_DR);
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c &= 0xff;
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return (c);
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}
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static int sa1110_bus_probe(struct uart_softc *sc);
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static int sa1110_bus_attach(struct uart_softc *sc);
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static int sa1110_bus_flush(struct uart_softc *, int);
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static int sa1110_bus_getsig(struct uart_softc *);
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static int sa1110_bus_ioctl(struct uart_softc *, int, intptr_t);
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static int sa1110_bus_ipend(struct uart_softc *);
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static int sa1110_bus_param(struct uart_softc *, int, int, int, int);
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static int sa1110_bus_receive(struct uart_softc *);
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static int sa1110_bus_setsig(struct uart_softc *, int);
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static int sa1110_bus_transmit(struct uart_softc *);
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static kobj_method_t sa1110_methods[] = {
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KOBJMETHOD(uart_probe, sa1110_bus_probe),
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KOBJMETHOD(uart_attach, sa1110_bus_attach),
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KOBJMETHOD(uart_flush, sa1110_bus_flush),
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KOBJMETHOD(uart_getsig, sa1110_bus_getsig),
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KOBJMETHOD(uart_ioctl, sa1110_bus_ioctl),
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KOBJMETHOD(uart_ipend, sa1110_bus_ipend),
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KOBJMETHOD(uart_param, sa1110_bus_param),
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KOBJMETHOD(uart_receive, sa1110_bus_receive),
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KOBJMETHOD(uart_setsig, sa1110_bus_setsig),
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KOBJMETHOD(uart_transmit, sa1110_bus_transmit),
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{0, 0 }
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};
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int
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sa1110_bus_probe(struct uart_softc *sc)
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{
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return (0);
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}
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static int
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sa1110_bus_attach(struct uart_softc *sc)
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{
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bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
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sc->sc_txfifosz = 3;
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sc->sc_rxfifosz = 1;
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sc->sc_hwiflow = 0;
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uart_setreg(&sc->sc_bas, SACOM_CR3, CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE);
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return (0);
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}
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static int
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sa1110_bus_transmit(struct uart_softc *sc)
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{
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int i;
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#if 0
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int sr = uart_getreg(&sc->sc_bas, SACOM_SR0);
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while (!(uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_TIE))
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uart_setreg(&sc->sc_bas, SACOM_CR3,
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uart_getreg(&sc->sc_bas, SACOM_CR3) | CR3_TIE);
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#endif
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sc->sc_txbusy = 1;
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uart_setreg(&sc->sc_bas, SACOM_CR3, uart_getreg(&sc->sc_bas, SACOM_CR3)
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| CR3_TIE);
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for (i = 0; i < sc->sc_txdatasz; i++) {
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while (!uart_getreg(&sc->sc_bas, SACOM_SR1) & SR1_TNF);
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uart_setreg(&sc->sc_bas, SACOM_DR, sc->sc_txbuf[i]);
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uart_barrier(&sc->sc_bas);
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}
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#if 0
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sr = uart_getreg(&sc->sc_bas, SACOM_SR0);
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#endif
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return (0);
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}
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static int
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sa1110_bus_setsig(struct uart_softc *sc, int sig)
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{
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return (0);
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}
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static int
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sa1110_bus_receive(struct uart_softc *sc)
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{
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#if 0
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while (!(uart_getreg(&sc->sc_bas, SACOM_SR1) & SR1_RNE)) {
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u_int32_t sr0;
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sr0 = uart_getreg(&sc->sc_bas, SACOM_SR0);
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if (ISSET(sr0, SR0_RBB))
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uart_setreg(&sc->sc_bas, SACOM_SR0, SR0_RBB);
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if (ISSET(sr0, SR0_REB))
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uart_setreg(&sc->sc_bas, SACOM_SR0, SR0_REB);
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}
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#endif
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uart_setreg(&sc->sc_bas, SACOM_CR3, uart_getreg(&sc->sc_bas, SACOM_CR3)
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| CR3_RIE);
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uart_rx_put(sc, uart_getreg(&sc->sc_bas, SACOM_DR));
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return (0);
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}
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static int
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sa1110_bus_param(struct uart_softc *sc, int baudrate, int databits,
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int stopbits, int parity)
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{
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int brd;
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if (baudrate > 0) {
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brd = SACOMSPEED(baudrate);
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uart_setreg(&sc->sc_bas, SACOM_CR1, brd >> 8);
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uart_setreg(&sc->sc_bas, SACOM_CR2, brd & 0xff);
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}
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return (0);
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}
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static int
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sa1110_bus_ipend(struct uart_softc *sc)
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{
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int sr = uart_getreg(&sc->sc_bas, SACOM_SR0);
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int ipend = 0;
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int mask = CR3_RIE | CR3_TIE;
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if (sr & 1) {
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if (uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_TIE)
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ipend |= SER_INT_TXIDLE;
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mask &= ~CR3_TIE;
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}
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if (sr & 4) {
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if (uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_RIE)
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ipend |= SER_INT_RXREADY;
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mask &= ~CR3_RIE;
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}
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uart_setreg(&sc->sc_bas, SACOM_CR3, CR3_RXE | mask);
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return (ipend);
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}
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static int
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sa1110_bus_flush(struct uart_softc *sc, int what)
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{
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return (0);
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}
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static int
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sa1110_bus_getsig(struct uart_softc *sc)
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{
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return (0);
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}
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static int
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sa1110_bus_ioctl(struct uart_softc *sc, int request, intptr_t data)
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{
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return (EINVAL);
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}
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struct uart_class uart_sa1110_class = {
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"sa1110 class",
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sa1110_methods,
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1,
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.uc_range = 8,
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.uc_rclk = 3686400
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};
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