Current Path : /sys/arm/sa11x0/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/arm/sa11x0/uart_dev_sa1110.c |
/*- * Copyright (c) 2003 Marcel Moolenaar * 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 THE AUTHOR ``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 THE AUTHOR 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 <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/arm/sa11x0/uart_dev_sa1110.c 172152 2007-09-12 18:28:09Z cognet $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/conf.h> #include <sys/cons.h> #include <sys/tty.h> #include <machine/bus.h> #include <dev/uart/uart.h> #include <dev/uart/uart_cpu.h> #include <dev/uart/uart_bus.h> #include <arm/sa11x0/sa11x0_reg.h> #include <arm/sa11x0/uart_dev_sa1110.h> #include "uart_if.h" #define DEFAULT_RCLK 3686400 /* * Low-level UART interface. */ static int sa1110_probe(struct uart_bas *bas); static void sa1110_init(struct uart_bas *bas, int, int, int, int); static void sa1110_term(struct uart_bas *bas); static void sa1110_putc(struct uart_bas *bas, int); static int sa1110_rxready(struct uart_bas *bas); static int sa1110_getc(struct uart_bas *bas, struct mtx *mtx); extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs; static struct uart_ops uart_sa1110_ops = { .probe = sa1110_probe, .init = sa1110_init, .term = sa1110_term, .putc = sa1110_putc, .rxready = sa1110_rxready, .getc = sa1110_getc, }; static int sa1110_probe(struct uart_bas *bas) { return (0); } static void sa1110_init(struct uart_bas *bas, int baudrate, int databits, int stopbits, int parity) { int brd; if (bas->rclk == 0) bas->rclk = DEFAULT_RCLK; while (uart_getreg(bas, SACOM_SR1) & SR1_TBY); uart_setreg(bas, SACOM_CR3, 0); brd = SACOMSPEED(baudrate); uart_setreg(bas, SACOM_CR1, brd >> 8); uart_setreg(bas, SACOM_CR2, brd & 0xff); uart_setreg(bas, SACOM_CR3, CR3_RXE | CR3_TXE); } static void sa1110_term(struct uart_bas *bas) { /* XXX */ } static void sa1110_putc(struct uart_bas *bas, int c) { while (!(uart_getreg(bas, SACOM_SR1) & SR1_TNF)); uart_setreg(bas, SACOM_DR, c); } static int sa1110_rxready(struct uart_bas *bas) { return ((uart_getreg(bas, SACOM_SR1) & SR1_RNE) != 0 ? 1 : 0); } static int sa1110_getc(struct uart_bas *bas, struct mtx *mtx) { int c; while (!(uart_getreg(bas, SACOM_SR1) & SR1_RNE)) { u_int32_t sr0; sr0 = uart_getreg(bas, SACOM_SR0); if (ISSET(sr0, SR0_RBB)) uart_setreg(bas, SACOM_SR0, SR0_RBB); if (ISSET(sr0, SR0_REB)) uart_setreg(bas, SACOM_SR0, SR0_REB); } c = uart_getreg(bas, SACOM_DR); c &= 0xff; return (c); } static int sa1110_bus_probe(struct uart_softc *sc); static int sa1110_bus_attach(struct uart_softc *sc); static int sa1110_bus_flush(struct uart_softc *, int); static int sa1110_bus_getsig(struct uart_softc *); static int sa1110_bus_ioctl(struct uart_softc *, int, intptr_t); static int sa1110_bus_ipend(struct uart_softc *); static int sa1110_bus_param(struct uart_softc *, int, int, int, int); static int sa1110_bus_receive(struct uart_softc *); static int sa1110_bus_setsig(struct uart_softc *, int); static int sa1110_bus_transmit(struct uart_softc *); static kobj_method_t sa1110_methods[] = { KOBJMETHOD(uart_probe, sa1110_bus_probe), KOBJMETHOD(uart_attach, sa1110_bus_attach), KOBJMETHOD(uart_flush, sa1110_bus_flush), KOBJMETHOD(uart_getsig, sa1110_bus_getsig), KOBJMETHOD(uart_ioctl, sa1110_bus_ioctl), KOBJMETHOD(uart_ipend, sa1110_bus_ipend), KOBJMETHOD(uart_param, sa1110_bus_param), KOBJMETHOD(uart_receive, sa1110_bus_receive), KOBJMETHOD(uart_setsig, sa1110_bus_setsig), KOBJMETHOD(uart_transmit, sa1110_bus_transmit), {0, 0 } }; int sa1110_bus_probe(struct uart_softc *sc) { return (0); } static int sa1110_bus_attach(struct uart_softc *sc) { bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas)); sc->sc_txfifosz = 3; sc->sc_rxfifosz = 1; sc->sc_hwiflow = 0; uart_setreg(&sc->sc_bas, SACOM_CR3, CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE); return (0); } static int sa1110_bus_transmit(struct uart_softc *sc) { int i; #if 0 int sr = uart_getreg(&sc->sc_bas, SACOM_SR0); while (!(uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_TIE)) uart_setreg(&sc->sc_bas, SACOM_CR3, uart_getreg(&sc->sc_bas, SACOM_CR3) | CR3_TIE); #endif sc->sc_txbusy = 1; uart_setreg(&sc->sc_bas, SACOM_CR3, uart_getreg(&sc->sc_bas, SACOM_CR3) | CR3_TIE); for (i = 0; i < sc->sc_txdatasz; i++) { while (!(uart_getreg(&sc->sc_bas, SACOM_SR1) & SR1_TNF)); uart_setreg(&sc->sc_bas, SACOM_DR, sc->sc_txbuf[i]); uart_barrier(&sc->sc_bas); } #if 0 sr = uart_getreg(&sc->sc_bas, SACOM_SR0); #endif return (0); } static int sa1110_bus_setsig(struct uart_softc *sc, int sig) { return (0); } static int sa1110_bus_receive(struct uart_softc *sc) { #if 0 while (!(uart_getreg(&sc->sc_bas, SACOM_SR1) & SR1_RNE)) { u_int32_t sr0; sr0 = uart_getreg(&sc->sc_bas, SACOM_SR0); if (ISSET(sr0, SR0_RBB)) uart_setreg(&sc->sc_bas, SACOM_SR0, SR0_RBB); if (ISSET(sr0, SR0_REB)) uart_setreg(&sc->sc_bas, SACOM_SR0, SR0_REB); } #endif uart_setreg(&sc->sc_bas, SACOM_CR3, uart_getreg(&sc->sc_bas, SACOM_CR3) | CR3_RIE); uart_rx_put(sc, uart_getreg(&sc->sc_bas, SACOM_DR)); return (0); } static int sa1110_bus_param(struct uart_softc *sc, int baudrate, int databits, int stopbits, int parity) { int brd; if (baudrate > 0) { brd = SACOMSPEED(baudrate); uart_setreg(&sc->sc_bas, SACOM_CR1, brd >> 8); uart_setreg(&sc->sc_bas, SACOM_CR2, brd & 0xff); } return (0); } static int sa1110_bus_ipend(struct uart_softc *sc) { int sr = uart_getreg(&sc->sc_bas, SACOM_SR0); int ipend = 0; int mask = CR3_RIE | CR3_TIE; if (sr & 1) { if (uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_TIE) ipend |= SER_INT_TXIDLE; mask &= ~CR3_TIE; } if (sr & 4) { if (uart_getreg(&sc->sc_bas, SACOM_CR3) & CR3_RIE) ipend |= SER_INT_RXREADY; mask &= ~CR3_RIE; } uart_setreg(&sc->sc_bas, SACOM_CR3, CR3_RXE | mask); return (ipend); } static int sa1110_bus_flush(struct uart_softc *sc, int what) { return (0); } static int sa1110_bus_getsig(struct uart_softc *sc) { return (0); } static int sa1110_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) { return (EINVAL); } struct uart_class uart_sa1110_class = { "sa1110", sa1110_methods, 1, .uc_ops = &uart_sa1110_ops, .uc_range = 8, .uc_rclk = 3686400 };