diff options
Diffstat (limited to 'sys/dev/uart/uart_dev_sab82532.c')
| -rw-r--r-- | sys/dev/uart/uart_dev_sab82532.c | 762 |
1 files changed, 0 insertions, 762 deletions
diff --git a/sys/dev/uart/uart_dev_sab82532.c b/sys/dev/uart/uart_dev_sab82532.c deleted file mode 100644 index 9cf41be5d7ab..000000000000 --- a/sys/dev/uart/uart_dev_sab82532.c +++ /dev/null @@ -1,762 +0,0 @@ -/*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD - * - * 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("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/conf.h> -#include <machine/bus.h> - -#include <dev/uart/uart.h> -#include <dev/uart/uart_cpu.h> -#include <dev/uart/uart_bus.h> - -#include <dev/ic/sab82532.h> - -#include "uart_if.h" - -#define DEFAULT_RCLK 29491200 - -/* - * NOTE: To allow us to read the baudrate divisor from the chip, we - * copy the value written to the write-only BGR register to an unused - * read-write register. We use TCR for that. - */ - -static int -sab82532_delay(struct uart_bas *bas) -{ - int divisor, m, n; - uint8_t bgr, ccr2; - - bgr = uart_getreg(bas, SAB_TCR); - ccr2 = uart_getreg(bas, SAB_CCR2); - n = (bgr & 0x3f) + 1; - m = (bgr >> 6) | ((ccr2 >> 4) & 0xC); - divisor = n * (1<<m); - - /* 1/10th the time to transmit 1 character (estimate). */ - return (16000000 * divisor / bas->rclk); -} - -static int -sab82532_divisor(int rclk, int baudrate) -{ - int act_baud, act_div, divisor; - int error, m, n; - - if (baudrate == 0) - return (0); - - divisor = (rclk / (baudrate << 3) + 1) >> 1; - if (divisor < 2 || divisor >= 1048576) - return (0); - - /* Find the best (N+1,M) pair. */ - for (m = 1; m < 15; m++) { - n = divisor / (1<<m); - if (n < 1 || n > 63) - continue; - act_div = n * (1<<m); - act_baud = rclk / (act_div << 4); - - /* 10 times error in percent: */ - error = ((act_baud - baudrate) * 2000 / baudrate + 1) >> 1; - - /* 3.0% maximum error tolerance: */ - if (error < -30 || error > 30) - continue; - - /* Got it. */ - return ((n - 1) | (m << 6)); - } - - return (0); -} - -static void -sab82532_flush(struct uart_bas *bas, int what) -{ - - if (what & UART_FLUSH_TRANSMITTER) { - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_XRES); - uart_barrier(bas); - } - if (what & UART_FLUSH_RECEIVER) { - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_RRES); - uart_barrier(bas); - } -} - -static int -sab82532_param(struct uart_bas *bas, int baudrate, int databits, int stopbits, - int parity) -{ - int divisor; - uint8_t ccr2, dafo; - - if (databits >= 8) - dafo = SAB_DAFO_CHL_CS8; - else if (databits == 7) - dafo = SAB_DAFO_CHL_CS7; - else if (databits == 6) - dafo = SAB_DAFO_CHL_CS6; - else - dafo = SAB_DAFO_CHL_CS5; - if (stopbits > 1) - dafo |= SAB_DAFO_STOP; - switch (parity) { - case UART_PARITY_EVEN: dafo |= SAB_DAFO_PAR_EVEN; break; - case UART_PARITY_MARK: dafo |= SAB_DAFO_PAR_MARK; break; - case UART_PARITY_NONE: dafo |= SAB_DAFO_PAR_NONE; break; - case UART_PARITY_ODD: dafo |= SAB_DAFO_PAR_ODD; break; - case UART_PARITY_SPACE: dafo |= SAB_DAFO_PAR_SPACE; break; - default: return (EINVAL); - } - - /* Set baudrate. */ - if (baudrate > 0) { - divisor = sab82532_divisor(bas->rclk, baudrate); - if (divisor == 0) - return (EINVAL); - uart_setreg(bas, SAB_BGR, divisor & 0xff); - uart_barrier(bas); - /* Allow reading the (n-1,m) tuple from the chip. */ - uart_setreg(bas, SAB_TCR, divisor & 0xff); - uart_barrier(bas); - ccr2 = uart_getreg(bas, SAB_CCR2); - ccr2 &= ~(SAB_CCR2_BR9 | SAB_CCR2_BR8); - ccr2 |= (divisor >> 2) & (SAB_CCR2_BR9 | SAB_CCR2_BR8); - uart_setreg(bas, SAB_CCR2, ccr2); - uart_barrier(bas); - } - - uart_setreg(bas, SAB_DAFO, dafo); - uart_barrier(bas); - return (0); -} - -/* - * Low-level UART interface. - */ -static int sab82532_probe(struct uart_bas *bas); -static void sab82532_init(struct uart_bas *bas, int, int, int, int); -static void sab82532_term(struct uart_bas *bas); -static void sab82532_putc(struct uart_bas *bas, int); -static int sab82532_rxready(struct uart_bas *bas); -static int sab82532_getc(struct uart_bas *bas, struct mtx *); - -static struct uart_ops uart_sab82532_ops = { - .probe = sab82532_probe, - .init = sab82532_init, - .term = sab82532_term, - .putc = sab82532_putc, - .rxready = sab82532_rxready, - .getc = sab82532_getc, -}; - -static int -sab82532_probe(struct uart_bas *bas) -{ - - return (0); -} - -static void -sab82532_init(struct uart_bas *bas, int baudrate, int databits, int stopbits, - int parity) -{ - uint8_t ccr0, pvr; - - if (bas->rclk == 0) - bas->rclk = DEFAULT_RCLK; - - /* - * Set all pins, except the DTR pins (pin 1 and 2) to be inputs. - * Pin 4 is magical, meaning that I don't know what it does, but - * it too has to be set to output. - */ - uart_setreg(bas, SAB_PCR, - ~(SAB_PVR_DTR_A|SAB_PVR_DTR_B|SAB_PVR_MAGIC)); - uart_barrier(bas); - /* Disable port interrupts. */ - uart_setreg(bas, SAB_PIM, 0xff); - uart_barrier(bas); - /* Interrupts are active low. */ - uart_setreg(bas, SAB_IPC, SAB_IPC_ICPL); - uart_barrier(bas); - /* Set DTR. */ - pvr = uart_getreg(bas, SAB_PVR); - switch (bas->chan) { - case 1: - pvr &= ~SAB_PVR_DTR_A; - break; - case 2: - pvr &= ~SAB_PVR_DTR_B; - break; - } - uart_setreg(bas, SAB_PVR, pvr | SAB_PVR_MAGIC); - uart_barrier(bas); - - /* power down */ - uart_setreg(bas, SAB_CCR0, 0); - uart_barrier(bas); - - /* set basic configuration */ - ccr0 = SAB_CCR0_MCE|SAB_CCR0_SC_NRZ|SAB_CCR0_SM_ASYNC; - uart_setreg(bas, SAB_CCR0, ccr0); - uart_barrier(bas); - uart_setreg(bas, SAB_CCR1, SAB_CCR1_ODS|SAB_CCR1_BCR|SAB_CCR1_CM_7); - uart_barrier(bas); - uart_setreg(bas, SAB_CCR2, SAB_CCR2_BDF|SAB_CCR2_SSEL|SAB_CCR2_TOE); - uart_barrier(bas); - uart_setreg(bas, SAB_CCR3, 0); - uart_barrier(bas); - uart_setreg(bas, SAB_CCR4, SAB_CCR4_MCK4|SAB_CCR4_EBRG|SAB_CCR4_ICD); - uart_barrier(bas); - uart_setreg(bas, SAB_MODE, SAB_MODE_FCTS|SAB_MODE_RTS|SAB_MODE_RAC); - uart_barrier(bas); - uart_setreg(bas, SAB_RFC, SAB_RFC_DPS|SAB_RFC_RFDF| - SAB_RFC_RFTH_32CHAR); - uart_barrier(bas); - - sab82532_param(bas, baudrate, databits, stopbits, parity); - - /* Clear interrupts. */ - uart_setreg(bas, SAB_IMR0, (unsigned char)~SAB_IMR0_TCD); - uart_setreg(bas, SAB_IMR1, 0xff); - uart_barrier(bas); - uart_getreg(bas, SAB_ISR0); - uart_getreg(bas, SAB_ISR1); - uart_barrier(bas); - - sab82532_flush(bas, UART_FLUSH_TRANSMITTER|UART_FLUSH_RECEIVER); - - /* Power up. */ - uart_setreg(bas, SAB_CCR0, ccr0|SAB_CCR0_PU); - uart_barrier(bas); -} - -static void -sab82532_term(struct uart_bas *bas) -{ - uint8_t pvr; - - pvr = uart_getreg(bas, SAB_PVR); - switch (bas->chan) { - case 1: - pvr |= SAB_PVR_DTR_A; - break; - case 2: - pvr |= SAB_PVR_DTR_B; - break; - } - uart_setreg(bas, SAB_PVR, pvr); - uart_barrier(bas); -} - -static void -sab82532_putc(struct uart_bas *bas, int c) -{ - int delay, limit; - - /* 1/10th the time to transmit 1 character (estimate). */ - delay = sab82532_delay(bas); - - limit = 20; - while ((uart_getreg(bas, SAB_STAR) & SAB_STAR_TEC) && --limit) - DELAY(delay); - uart_setreg(bas, SAB_TIC, c); - limit = 20; - while ((uart_getreg(bas, SAB_STAR) & SAB_STAR_TEC) && --limit) - DELAY(delay); -} - -static int -sab82532_rxready(struct uart_bas *bas) -{ - - return ((uart_getreg(bas, SAB_STAR) & SAB_STAR_RFNE) != 0 ? 1 : 0); -} - -static int -sab82532_getc(struct uart_bas *bas, struct mtx *hwmtx) -{ - int c, delay; - - uart_lock(hwmtx); - - /* 1/10th the time to transmit 1 character (estimate). */ - delay = sab82532_delay(bas); - - while (!(uart_getreg(bas, SAB_STAR) & SAB_STAR_RFNE)) { - uart_unlock(hwmtx); - DELAY(delay); - uart_lock(hwmtx); - } - - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_RFRD); - uart_barrier(bas); - - while (!(uart_getreg(bas, SAB_ISR0) & SAB_ISR0_TCD)) - DELAY(delay); - - c = uart_getreg(bas, SAB_RFIFO); - uart_barrier(bas); - - /* Blow away everything left in the FIFO... */ - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_RMC); - uart_barrier(bas); - - uart_unlock(hwmtx); - - return (c); -} - -/* - * High-level UART interface. - */ -struct sab82532_softc { - struct uart_softc base; -}; - -static int sab82532_bus_attach(struct uart_softc *); -static int sab82532_bus_detach(struct uart_softc *); -static int sab82532_bus_flush(struct uart_softc *, int); -static int sab82532_bus_getsig(struct uart_softc *); -static int sab82532_bus_ioctl(struct uart_softc *, int, intptr_t); -static int sab82532_bus_ipend(struct uart_softc *); -static int sab82532_bus_param(struct uart_softc *, int, int, int, int); -static int sab82532_bus_probe(struct uart_softc *); -static int sab82532_bus_receive(struct uart_softc *); -static int sab82532_bus_setsig(struct uart_softc *, int); -static int sab82532_bus_transmit(struct uart_softc *); -static void sab82532_bus_grab(struct uart_softc *); -static void sab82532_bus_ungrab(struct uart_softc *); - -static kobj_method_t sab82532_methods[] = { - KOBJMETHOD(uart_attach, sab82532_bus_attach), - KOBJMETHOD(uart_detach, sab82532_bus_detach), - KOBJMETHOD(uart_flush, sab82532_bus_flush), - KOBJMETHOD(uart_getsig, sab82532_bus_getsig), - KOBJMETHOD(uart_ioctl, sab82532_bus_ioctl), - KOBJMETHOD(uart_ipend, sab82532_bus_ipend), - KOBJMETHOD(uart_param, sab82532_bus_param), - KOBJMETHOD(uart_probe, sab82532_bus_probe), - KOBJMETHOD(uart_receive, sab82532_bus_receive), - KOBJMETHOD(uart_setsig, sab82532_bus_setsig), - KOBJMETHOD(uart_transmit, sab82532_bus_transmit), - KOBJMETHOD(uart_grab, sab82532_bus_grab), - KOBJMETHOD(uart_ungrab, sab82532_bus_ungrab), - { 0, 0 } -}; - -struct uart_class uart_sab82532_class = { - "sab82532", - sab82532_methods, - sizeof(struct sab82532_softc), - .uc_ops = &uart_sab82532_ops, - .uc_range = 64, - .uc_rclk = DEFAULT_RCLK, - .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; \ - } - -static int -sab82532_bus_attach(struct uart_softc *sc) -{ - struct uart_bas *bas; - uint8_t imr0, imr1; - - bas = &sc->sc_bas; - if (sc->sc_sysdev == NULL) - sab82532_init(bas, 9600, 8, 1, UART_PARITY_NONE); - - imr0 = SAB_IMR0_TCD|SAB_IMR0_TIME|SAB_IMR0_CDSC|SAB_IMR0_RFO| - SAB_IMR0_RPF; - uart_setreg(bas, SAB_IMR0, 0xff & ~imr0); - imr1 = SAB_IMR1_BRKT|SAB_IMR1_ALLS|SAB_IMR1_CSC; - uart_setreg(bas, SAB_IMR1, 0xff & ~imr1); - uart_barrier(bas); - - if (sc->sc_sysdev == NULL) - sab82532_bus_setsig(sc, SER_DDTR|SER_DRTS); - (void)sab82532_bus_getsig(sc); - return (0); -} - -static int -sab82532_bus_detach(struct uart_softc *sc) -{ - struct uart_bas *bas; - - bas = &sc->sc_bas; - uart_setreg(bas, SAB_IMR0, 0xff); - uart_setreg(bas, SAB_IMR1, 0xff); - uart_barrier(bas); - uart_getreg(bas, SAB_ISR0); - uart_getreg(bas, SAB_ISR1); - uart_barrier(bas); - uart_setreg(bas, SAB_CCR0, 0); - uart_barrier(bas); - return (0); -} - -static int -sab82532_bus_flush(struct uart_softc *sc, int what) -{ - - uart_lock(sc->sc_hwmtx); - sab82532_flush(&sc->sc_bas, what); - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static int -sab82532_bus_getsig(struct uart_softc *sc) -{ - struct uart_bas *bas; - uint32_t new, old, sig; - uint8_t pvr, star, vstr; - - bas = &sc->sc_bas; - do { - old = sc->sc_hwsig; - sig = old; - uart_lock(sc->sc_hwmtx); - star = uart_getreg(bas, SAB_STAR); - SIGCHG(star & SAB_STAR_CTS, sig, SER_CTS, SER_DCTS); - vstr = uart_getreg(bas, SAB_VSTR); - SIGCHG(vstr & SAB_VSTR_CD, sig, SER_DCD, SER_DDCD); - pvr = ~uart_getreg(bas, SAB_PVR); - switch (bas->chan) { - case 1: - pvr &= SAB_PVR_DSR_A; - break; - case 2: - pvr &= SAB_PVR_DSR_B; - break; - } - SIGCHG(pvr, sig, SER_DSR, SER_DDSR); - uart_unlock(sc->sc_hwmtx); - new = sig & ~SER_MASK_DELTA; - } while (!atomic_cmpset_32(&sc->sc_hwsig, old, new)); - return (sig); -} - -static int -sab82532_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) -{ - struct uart_bas *bas; - uint8_t dafo, mode; - int error; - - bas = &sc->sc_bas; - error = 0; - uart_lock(sc->sc_hwmtx); - switch (request) { - case UART_IOCTL_BREAK: - dafo = uart_getreg(bas, SAB_DAFO); - if (data) - dafo |= SAB_DAFO_XBRK; - else - dafo &= ~SAB_DAFO_XBRK; - uart_setreg(bas, SAB_DAFO, dafo); - uart_barrier(bas); - break; - case UART_IOCTL_IFLOW: - mode = uart_getreg(bas, SAB_MODE); - if (data) { - mode &= ~SAB_MODE_RTS; - mode |= SAB_MODE_FRTS; - } else { - mode |= SAB_MODE_RTS; - mode &= ~SAB_MODE_FRTS; - } - uart_setreg(bas, SAB_MODE, mode); - uart_barrier(bas); - break; - case UART_IOCTL_OFLOW: - mode = uart_getreg(bas, SAB_MODE); - if (data) - mode &= ~SAB_MODE_FCTS; - else - mode |= SAB_MODE_FCTS; - uart_setreg(bas, SAB_MODE, mode); - uart_barrier(bas); - break; - default: - error = EINVAL; - break; - } - uart_unlock(sc->sc_hwmtx); - return (error); -} - -static int -sab82532_bus_ipend(struct uart_softc *sc) -{ - struct uart_bas *bas; - int ipend; - uint8_t isr0, isr1; - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - isr0 = uart_getreg(bas, SAB_ISR0); - isr1 = uart_getreg(bas, SAB_ISR1); - uart_barrier(bas); - if (isr0 & SAB_ISR0_TIME) { - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_RFRD); - uart_barrier(bas); - } - uart_unlock(sc->sc_hwmtx); - - ipend = 0; - if (isr1 & SAB_ISR1_BRKT) - ipend |= SER_INT_BREAK; - if (isr0 & SAB_ISR0_RFO) - ipend |= SER_INT_OVERRUN; - if (isr0 & (SAB_ISR0_TCD|SAB_ISR0_RPF)) - ipend |= SER_INT_RXREADY; - if ((isr0 & SAB_ISR0_CDSC) || (isr1 & SAB_ISR1_CSC)) - ipend |= SER_INT_SIGCHG; - if (isr1 & SAB_ISR1_ALLS) - ipend |= SER_INT_TXIDLE; - - return (ipend); -} - -static int -sab82532_bus_param(struct uart_softc *sc, int baudrate, int databits, - int stopbits, int parity) -{ - struct uart_bas *bas; - int error; - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - error = sab82532_param(bas, baudrate, databits, stopbits, parity); - uart_unlock(sc->sc_hwmtx); - return (error); -} - -static int -sab82532_bus_probe(struct uart_softc *sc) -{ - char buf[80]; - const char *vstr; - int error; - char ch; - - error = sab82532_probe(&sc->sc_bas); - if (error) - return (error); - - sc->sc_rxfifosz = 32; - sc->sc_txfifosz = 32; - - ch = sc->sc_bas.chan - 1 + 'A'; - - switch (uart_getreg(&sc->sc_bas, SAB_VSTR) & SAB_VSTR_VMASK) { - case SAB_VSTR_V_1: - vstr = "v1"; - break; - case SAB_VSTR_V_2: - vstr = "v2"; - break; - case SAB_VSTR_V_32: - vstr = "v3.2"; - sc->sc_hwiflow = 0; /* CTS doesn't work with RFC:RFDF. */ - sc->sc_hwoflow = 1; - break; - default: - vstr = "v4?"; - break; - } - - snprintf(buf, sizeof(buf), "SAB 82532 %s, channel %c", vstr, ch); - device_set_desc_copy(sc->sc_dev, buf); - return (0); -} - -static int -sab82532_bus_receive(struct uart_softc *sc) -{ - struct uart_bas *bas; - int i, rbcl, xc; - uint8_t s; - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - if (uart_getreg(bas, SAB_STAR) & SAB_STAR_RFNE) { - rbcl = uart_getreg(bas, SAB_RBCL) & 31; - if (rbcl == 0) - rbcl = 32; - for (i = 0; i < rbcl; i += 2) { - if (uart_rx_full(sc)) { - sc->sc_rxbuf[sc->sc_rxput] = UART_STAT_OVERRUN; - break; - } - xc = uart_getreg(bas, SAB_RFIFO); - s = uart_getreg(bas, SAB_RFIFO + 1); - if (s & SAB_RSTAT_FE) - xc |= UART_STAT_FRAMERR; - if (s & SAB_RSTAT_PE) - xc |= UART_STAT_PARERR; - uart_rx_put(sc, xc); - } - } - - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_RMC); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static int -sab82532_bus_setsig(struct uart_softc *sc, int sig) -{ - struct uart_bas *bas; - uint32_t new, old; - uint8_t mode, pvr; - - bas = &sc->sc_bas; - do { - old = sc->sc_hwsig; - new = old; - if (sig & SER_DDTR) { - SIGCHG(sig & SER_DTR, new, SER_DTR, - SER_DDTR); - } - if (sig & SER_DRTS) { - SIGCHG(sig & SER_RTS, new, SER_RTS, - SER_DRTS); - } - } while (!atomic_cmpset_32(&sc->sc_hwsig, old, new)); - - uart_lock(sc->sc_hwmtx); - /* Set DTR pin. */ - pvr = uart_getreg(bas, SAB_PVR); - switch (bas->chan) { - case 1: - if (new & SER_DTR) - pvr &= ~SAB_PVR_DTR_A; - else - pvr |= SAB_PVR_DTR_A; - break; - case 2: - if (new & SER_DTR) - pvr &= ~SAB_PVR_DTR_B; - else - pvr |= SAB_PVR_DTR_B; - break; - } - uart_setreg(bas, SAB_PVR, pvr); - - /* Set RTS pin. */ - mode = uart_getreg(bas, SAB_MODE); - if (new & SER_RTS) - mode &= ~SAB_MODE_FRTS; - else - mode |= SAB_MODE_FRTS; - uart_setreg(bas, SAB_MODE, mode); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static int -sab82532_bus_transmit(struct uart_softc *sc) -{ - struct uart_bas *bas; - int i; - - bas = &sc->sc_bas; - uart_lock(sc->sc_hwmtx); - while (!(uart_getreg(bas, SAB_STAR) & SAB_STAR_XFW)) - ; - for (i = 0; i < sc->sc_txdatasz; i++) - uart_setreg(bas, SAB_XFIFO + i, sc->sc_txbuf[i]); - uart_barrier(bas); - while (uart_getreg(bas, SAB_STAR) & SAB_STAR_CEC) - ; - uart_setreg(bas, SAB_CMDR, SAB_CMDR_XF); - sc->sc_txbusy = 1; - uart_unlock(sc->sc_hwmtx); - return (0); -} - -static void -sab82532_bus_grab(struct uart_softc *sc) -{ - struct uart_bas *bas; - uint8_t imr0; - - bas = &sc->sc_bas; - imr0 = SAB_IMR0_TIME|SAB_IMR0_CDSC|SAB_IMR0_RFO; /* No TCD or RPF */ - uart_lock(sc->sc_hwmtx); - uart_setreg(bas, SAB_IMR0, 0xff & ~imr0); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); -} - -static void -sab82532_bus_ungrab(struct uart_softc *sc) -{ - struct uart_bas *bas; - uint8_t imr0; - - bas = &sc->sc_bas; - imr0 = SAB_IMR0_TCD|SAB_IMR0_TIME|SAB_IMR0_CDSC|SAB_IMR0_RFO| - SAB_IMR0_RPF; - uart_lock(sc->sc_hwmtx); - uart_setreg(bas, SAB_IMR0, 0xff & ~imr0); - uart_barrier(bas); - uart_unlock(sc->sc_hwmtx); -} |