diff options
Diffstat (limited to 'sys/mips/rt305x/uart_dev_rt305x.c')
| -rw-r--r-- | sys/mips/rt305x/uart_dev_rt305x.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/sys/mips/rt305x/uart_dev_rt305x.c b/sys/mips/rt305x/uart_dev_rt305x.c deleted file mode 100644 index e52c4e47e461..000000000000 --- a/sys/mips/rt305x/uart_dev_rt305x.c +++ /dev/null @@ -1,535 +0,0 @@ -/* $NetBSD: uart.c,v 1.2 2007/03/23 20:05:47 dogcow Exp $ */ - -/*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD - * - * Copyright (c) 2010 Aleksandr Rybalko. - * Copyright (c) 2007 Ruslan Ermilov and Vsevolod Lobko. - * Copyright (c) 2007 Oleksandr Tymoshenko. - * 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 AUTHORS ``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 AUTHORS - * 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("$FreeBSD$"); - -#include "opt_ddb.h" - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/conf.h> -#include <sys/kdb.h> -#include <sys/reboot.h> -#include <sys/sysctl.h> -#include <sys/kernel.h> -#include <machine/bus.h> - -#include <dev/uart/uart.h> -#include <dev/uart/uart_cpu.h> -#include <dev/uart/uart_bus.h> - -#include <mips/rt305x/uart_dev_rt305x.h> -#include <mips/rt305x/rt305xreg.h> - -#include "uart_if.h" -/* - * Low-level UART interface. - */ -static int rt305x_uart_probe(struct uart_bas *bas); -static void rt305x_uart_init(struct uart_bas *bas, int, int, int, int); -static void rt305x_uart_term(struct uart_bas *bas); -static void rt305x_uart_putc(struct uart_bas *bas, int); -static int rt305x_uart_rxready(struct uart_bas *bas); -static int rt305x_uart_getc(struct uart_bas *bas, struct mtx *); - -static struct uart_ops uart_rt305x_uart_ops = { - .probe = rt305x_uart_probe, - .init = rt305x_uart_init, - .term = rt305x_uart_term, - .putc = rt305x_uart_putc, - .rxready = rt305x_uart_rxready, - .getc = rt305x_uart_getc, -}; - -static int uart_output = 1; -SYSCTL_INT(_kern, OID_AUTO, uart_output, CTLFLAG_RWTUN, - &uart_output, 0, "UART output enabled."); - -static int -rt305x_uart_probe(struct uart_bas *bas) -{ - - return (0); -} - -static void -rt305x_uart_init(struct uart_bas *bas, int baudrate, int databits, - int stopbits, int parity) -{ -#ifdef notyet - /* CLKDIV = 384000000/ 3/ 16/ br */ - /* for 384MHz CLKDIV = 8000000 / baudrate; */ - switch (databits) { - case 5: - databits = UART_LCR_5B; - break; - case 6: - databits = UART_LCR_6B; - break; - case 7: - databits = UART_LCR_7B; - break; - case 8: - databits = UART_LCR_8B; - break; - default: - /* Unsupported */ - return; - } - switch (parity) { - case UART_PARITY_EVEN: parity = (UART_LCR_PEN|UART_LCR_EVEN); break; - case UART_PARITY_NONE: parity = (UART_LCR_PEN); break; - case UART_PARITY_ODD: parity = 0; break; - /* Unsupported */ - default: return; - } - uart_setreg(bas, UART_CDDL_REG, 8000000/baudrate); - uart_barrier(bas); - uart_setreg(bas, UART_LCR_REG, databits | (stopbits==1?0:4) | parity); - uart_barrier(bas); -#endif -} - -static void -rt305x_uart_term(struct uart_bas *bas) -{ - uart_setreg(bas, UART_MCR_REG, 0); - uart_barrier(bas); -} - -static void -rt305x_uart_putc(struct uart_bas *bas, int c) -{ - char chr; - if (!uart_output) return; - chr = c; - while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE)); - uart_setreg(bas, UART_TX_REG, c); - uart_barrier(bas); - while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE)); -} - -static int -rt305x_uart_rxready(struct uart_bas *bas) -{ -#ifdef notyet - if (uart_getreg(bas, UART_LSR_REG) & UART_LSR_DR) - return (1); - - return (0); -#else - return (1); -#endif -} - -static int -rt305x_uart_getc(struct uart_bas *bas, struct mtx *hwmtx) -{ - int c; - - uart_lock(hwmtx); - - while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_DR)) { - uart_unlock(hwmtx); - DELAY(10); - uart_lock(hwmtx); - } - - c = uart_getreg(bas, UART_RX_REG); - - uart_unlock(hwmtx); - - return (c); -} - -/* - * High-level UART interface. - */ -struct rt305x_uart_softc { - struct uart_softc base; -}; - -static int rt305x_uart_bus_attach(struct uart_softc *); -static int rt305x_uart_bus_detach(struct uart_softc *); -static int rt305x_uart_bus_flush(struct uart_softc *, int); -static int rt305x_uart_bus_getsig(struct uart_softc *); -static int rt305x_uart_bus_ioctl(struct uart_softc *, int, intptr_t); -static int rt305x_uart_bus_ipend(struct uart_softc *); -static int rt305x_uart_bus_param(struct uart_softc *, int, int, int, int); -static int rt305x_uart_bus_probe(struct uart_softc *); -static int rt305x_uart_bus_receive(struct uart_softc *); -static int rt305x_uart_bus_setsig(struct uart_softc *, int); -static int rt305x_uart_bus_transmit(struct uart_softc *); -static void rt305x_uart_bus_grab(struct uart_softc *); -static void rt305x_uart_bus_ungrab(struct uart_softc *); - -static kobj_method_t rt305x_uart_methods[] = { - KOBJMETHOD(uart_attach, rt305x_uart_bus_attach), - KOBJMETHOD(uart_detach, rt305x_uart_bus_detach), - KOBJMETHOD(uart_flush, rt305x_uart_bus_flush), - KOBJMETHOD(uart_getsig, rt305x_uart_bus_getsig), - KOBJMETHOD(uart_ioctl, rt305x_uart_bus_ioctl), - KOBJMETHOD(uart_ipend, rt305x_uart_bus_ipend), - KOBJMETHOD(uart_param, rt305x_uart_bus_param), - KOBJMETHOD(uart_probe, rt305x_uart_bus_probe), - KOBJMETHOD(uart_receive, rt305x_uart_bus_receive), - KOBJMETHOD(uart_setsig, rt305x_uart_bus_setsig), - KOBJMETHOD(uart_transmit, rt305x_uart_bus_transmit), - KOBJMETHOD(uart_grab, rt305x_uart_bus_grab), - KOBJMETHOD(uart_ungrab, rt305x_uart_bus_ungrab), - { 0, 0 } -}; - -struct uart_class uart_rt305x_uart_class = { - "rt305x", - rt305x_uart_methods, - sizeof(struct rt305x_uart_softc), - .uc_ops = &uart_rt305x_uart_ops, - .uc_range = 1, /* use hinted range */ - .uc_rclk = SYSTEM_CLOCK, - .uc_rshift = 0 -}; - -#define SIGCHG(c, i, s, d) \ - if (c) { \ - i |= (i & s) ? s : s | d; \ - } else { \ - i = (i & s) ? (i & ~s) | d : i; \ - } - -/* - * Disable TX interrupt. uart should be locked - */ -static __inline void -rt305x_uart_disable_txintr(struct uart_softc *sc) -{ - struct uart_bas *bas = &sc->sc_bas; - uint8_t cr; - - cr = uart_getreg(bas, UART_IER_REG); - cr &= ~UART_IER_ETBEI; - uart_setreg(bas, UART_IER_REG, cr); - uart_barrier(bas); -} - -/* - * Enable TX interrupt. uart should be locked - */ -static __inline void -rt305x_uart_enable_txintr(struct uart_softc *sc) -{ - struct uart_bas *bas = &sc->sc_bas; - uint8_t cr; - - cr = uart_getreg(bas, UART_IER_REG); - cr |= UART_IER_ETBEI; - uart_setreg(bas, UART_IER_REG, cr); - uart_barrier(bas); -} - -static int -rt305x_uart_bus_attach(struct uart_softc *sc) -{ - struct uart_bas *bas; - struct uart_devinfo *di; - - bas = &sc->sc_bas; - if (sc->sc_sysdev != NULL) { - di = sc->sc_sysdev; - rt305x_uart_init(bas, di->baudrate, di->databits, di->stopbits, - di->parity); - } else { - rt305x_uart_init(bas, 115200, 8, 1, 0); - } - - (void)rt305x_uart_bus_getsig(sc); - - /* Enable FIFO */ - uart_setreg(bas, UART_FCR_REG, - uart_getreg(bas, UART_FCR_REG) | - UART_FCR_FIFOEN | UART_FCR_TXTGR_1 | UART_FCR_RXTGR_1); - uart_barrier(bas); - /* Enable interrupts */ - uart_setreg(bas, UART_IER_REG, - UART_IER_EDSSI | UART_IER_ELSI | UART_IER_ERBFI); - uart_barrier(bas); - - return (0); -} - -static int -rt305x_uart_bus_detach(struct uart_softc *sc) -{ - - return (0); -} - -static int -rt305x_uart_bus_flush(struct uart_softc *sc, int what) -{ - struct uart_bas *bas = &sc->sc_bas; - uint32_t fcr = uart_getreg(bas, UART_FCR_REG); - if (what & UART_FLUSH_TRANSMITTER) { - uart_setreg(bas, UART_FCR_REG, fcr|UART_FCR_TXRST); - uart_barrier(bas); - } - if (what & UART_FLUSH_RECEIVER) { - uart_setreg(bas, UART_FCR_REG, fcr|UART_FCR_RXRST); - uart_barrier(bas); - } - uart_setreg(bas, UART_FCR_REG, fcr); - uart_barrier(bas); - return (0); -} - -static int -rt305x_uart_bus_getsig(struct uart_softc *sc) -{ - uint32_t new, old, sig; - uint8_t bes; - - do { - old = sc->sc_hwsig; - sig = old; - uart_lock(sc->sc_hwmtx); - bes = uart_getreg(&sc->sc_bas, UART_MSR_REG); - uart_unlock(sc->sc_hwmtx); - /* XXX: chip can show delta */ - SIGCHG(bes & UART_MSR_CTS, sig, SER_CTS, SER_DCTS); - SIGCHG(bes & UART_MSR_DCD, sig, SER_DCD, SER_DDCD); - SIGCHG(bes & UART_MSR_DSR, sig, SER_DSR, SER_DDSR); - new = sig & ~SER_MASK_DELTA; - } while (!atomic_cmpset_32(&sc->sc_hwsig, old, new)); - - return (sig); -} - -static int -rt305x_uart_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) -{ - struct uart_bas *bas; - int baudrate, divisor, error; - - bas = &sc->sc_bas; - error = 0; - uart_lock(sc->sc_hwmtx); - switch (request) { - case UART_IOCTL_BREAK: - /* TODO: Send BREAK */ - break; - case UART_IOCTL_BAUD: - divisor = uart_getreg(bas, UART_CDDL_REG); - baudrate = bas->rclk / (divisor * 16); - *(int*)data = baudrate; - break; - default: - error = EINVAL; - break; - } - uart_unlock(sc->sc_hwmtx); - return (error); -} - -static int -rt305x_uart_bus_ipend(struct uart_softc *sc) -{ - struct uart_bas *bas; - int ipend; - uint8_t iir, lsr, msr; - - bas = &sc->sc_bas; - ipend = 0; - - uart_lock(sc->sc_hwmtx); - iir = uart_getreg(&sc->sc_bas, UART_IIR_REG); - lsr = uart_getreg(&sc->sc_bas, UART_LSR_REG); - uart_setreg(&sc->sc_bas, UART_LSR_REG, lsr); - msr = uart_getreg(&sc->sc_bas, UART_MSR_REG); - uart_setreg(&sc->sc_bas, UART_MSR_REG, msr); - if (iir & UART_IIR_INTP) { - uart_unlock(sc->sc_hwmtx); - return (0); - } - - - switch ((iir >> 1) & 0x07) { - case UART_IIR_ID_THRE: - ipend |= SER_INT_TXIDLE; - break; - case UART_IIR_ID_DR2: - rt305x_uart_bus_flush(sc, UART_FLUSH_RECEIVER); - /* passthrough */ - case UART_IIR_ID_DR: - ipend |= SER_INT_RXREADY; - break; - case UART_IIR_ID_MST: - case UART_IIR_ID_LINESTATUS: - ipend |= SER_INT_SIGCHG; - if (lsr & UART_LSR_BI) - { - ipend |= SER_INT_BREAK; -#ifdef KDB - breakpoint(); -#endif - } - if (lsr & UART_LSR_OE) - ipend |= SER_INT_OVERRUN; - break; - default: - /* XXX: maybe return error here */ - break; - } - - uart_unlock(sc->sc_hwmtx); - - return (ipend); -} - -static int -rt305x_uart_bus_param(struct uart_softc *sc, int baudrate, int databits, - int stopbits, int parity) -{ - uart_lock(sc->sc_hwmtx); - rt305x_uart_init(&sc->sc_bas, baudrate, databits, stopbits, parity); - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static int -rt305x_uart_bus_probe(struct uart_softc *sc) -{ - char buf[80]; - int error; - - error = rt305x_uart_probe(&sc->sc_bas); - if (error) - return (error); - - sc->sc_rxfifosz = 16; - sc->sc_txfifosz = 16; - - snprintf(buf, sizeof(buf), "rt305x_uart"); - device_set_desc_copy(sc->sc_dev, buf); - - return (0); -} - -static int -rt305x_uart_bus_receive(struct uart_softc *sc) -{ - struct uart_bas *bas; - int xc; - uint8_t lsr; - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - lsr = uart_getreg(bas, UART_LSR_REG); - while ((lsr & UART_LSR_DR)) { - if (uart_rx_full(sc)) { - sc->sc_rxbuf[sc->sc_rxput] = UART_STAT_OVERRUN; - break; - } - xc = 0; - xc = uart_getreg(bas, UART_RX_REG); - if (lsr & UART_LSR_FE) - xc |= UART_STAT_FRAMERR; - if (lsr & UART_LSR_PE) - xc |= UART_STAT_PARERR; - if (lsr & UART_LSR_OE) - xc |= UART_STAT_OVERRUN; - uart_barrier(bas); - uart_rx_put(sc, xc); - lsr = uart_getreg(bas, UART_LSR_REG); - } - - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static int -rt305x_uart_bus_setsig(struct uart_softc *sc, int sig) -{ - - /* TODO: implement (?) */ - return (0); -} - -static int -rt305x_uart_bus_transmit(struct uart_softc *sc) -{ - struct uart_bas *bas = &sc->sc_bas; - int i; - - if (!uart_output) return (0); - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - while ((uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE) == 0) - ; - rt305x_uart_enable_txintr(sc); - for (i = 0; i < sc->sc_txdatasz; i++) { - uart_setreg(bas, UART_TX_REG, sc->sc_txbuf[i]); - uart_barrier(bas); - } - sc->sc_txbusy = 1; - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static void -rt305x_uart_bus_grab(struct uart_softc *sc) -{ - struct uart_bas *bas = &sc->sc_bas; - - /* disable interrupts -- XXX not sure which one is RX, so kill them all */ - uart_lock(sc->sc_hwmtx); - uart_setreg(bas, UART_IER_REG, 0); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); -} - -static void -rt305x_uart_bus_ungrab(struct uart_softc *sc) -{ - struct uart_bas *bas = &sc->sc_bas; - - /* Enable interrupts */ - uart_lock(sc->sc_hwmtx); - uart_setreg(bas, UART_IER_REG, - UART_IER_EDSSI | UART_IER_ELSI | UART_IER_ERBFI); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); -} |