From 282e735ec5f887e380e4ca31e411c5365c102af1 Mon Sep 17 00:00:00 2001 From: visa Date: Sat, 24 Apr 2021 07:49:11 +0000 Subject: [PATCH] Add cduart(4), a driver for the Cadence UART found on Xilinx Zynq SoCs. Tested on Xilinx Zynq-7000. Input and OK kettenis@ --- share/man/man4/Makefile | 5 +- share/man/man4/cduart.4 | 36 ++ sys/arch/armv7/armv7/platform.c | 4 +- sys/arch/armv7/conf/GENERIC | 5 +- sys/arch/armv7/conf/RAMDISK | 5 +- sys/dev/fdt/cduart.c | 703 ++++++++++++++++++++++++++++++++ sys/dev/fdt/files.fdt | 6 +- 7 files changed, 758 insertions(+), 6 deletions(-) create mode 100644 share/man/man4/cduart.4 create mode 100644 sys/dev/fdt/cduart.c diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index 0edb314e09f..734737cf42c 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -1,4 +1,4 @@ -# $OpenBSD: Makefile,v 1.795 2021/04/24 05:16:27 jsg Exp $ +# $OpenBSD: Makefile,v 1.796 2021/04/24 07:49:11 visa Exp $ MAN= aac.4 abcrtc.4 abl.4 ac97.4 acphy.4 acrtc.4 \ acpi.4 acpiac.4 acpials.4 acpiasus.4 acpibat.4 \ @@ -23,7 +23,8 @@ MAN= aac.4 abcrtc.4 abl.4 ac97.4 acphy.4 acrtc.4 \ bcmtmon.4 bdpmic.4 \ berkwdt.4 bge.4 bgw.4 bio.4 bpe.4 bktr.4 bmtphy.4 bnx.4 bnxt.4 \ boca.4 bpf.4 brgphy.4 bridge.4 brswphy.4 bse.4 bwfm.4 bwi.4 bytgpio.4 \ - cac.4 cas.4 cardbus.4 carp.4 ccp.4 ccpmic.4 cd.4 cdce.4 cfxga.4 \ + cac.4 cas.4 cardbus.4 carp.4 ccp.4 ccpmic.4 cd.4 cdce.4 \ + cduart.4 cfxga.4 \ ch.4 chvgpio.4 ciphy.4 ciss.4 clcs.4 clct.4 cmpci.4 \ com.4 cue.4 cwfg.4 cy.4 cz.4 \ dc.4 dcphy.4 ddb.4 de.4 diskmap.4 divert.4 drm.4 dsxrtc.4 dt.4 \ diff --git a/share/man/man4/cduart.4 b/share/man/man4/cduart.4 new file mode 100644 index 00000000000..9d330d2657a --- /dev/null +++ b/share/man/man4/cduart.4 @@ -0,0 +1,36 @@ +.\" $OpenBSD: cduart.4,v 1.1 2021/04/24 07:49:11 visa Exp $ +.\" +.\" Copyright (c) 2021 Visa Hankala +.\" +.\" Permission to use, copy, modify, and distribute this software for any +.\" purpose with or without fee is hereby granted, provided that the above +.\" copyright notice and this permission notice appear in all copies. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +.\" +.Dd $Mdocdate: April 24 2021 $ +.Dt CDUART 4 +.Os +.Sh NAME +.Nm cduart +.Nd Cadence Universal Asynchronous Receiver/Transmitter +.Sh SYNOPSIS +.Cd "cduart* at fdt?" +.Sh DESCRIPTION +The +.Nm +driver supports the Cadence Universal Asynchronous +Receiver/Transmitter (UART). +.Sh SEE ALSO +.Xr tty 4 +.Sh HISTORY +The +.Nm +driver first appeared in +.Ox 7.0 . diff --git a/sys/arch/armv7/armv7/platform.c b/sys/arch/armv7/armv7/platform.c index 650886e6dfa..19166736a9f 100644 --- a/sys/arch/armv7/armv7/platform.c +++ b/sys/arch/armv7/armv7/platform.c @@ -1,4 +1,4 @@ -/* $OpenBSD: platform.c,v 1.25 2021/03/25 04:12:01 jsg Exp $ */ +/* $OpenBSD: platform.c,v 1.26 2021/04/24 07:49:11 visa Exp $ */ /* * Copyright (c) 2014 Patrick Wildt * @@ -30,6 +30,7 @@ static struct armv7_platform *platform; void agtimer_init(void); +extern void cduart_init_cons(void); extern void exuart_init_cons(void); extern void imxuart_init_cons(void); extern void com_fdt_init_cons(void); @@ -87,6 +88,7 @@ platform_init_cons(void) platform->init_cons(); return; } + cduart_init_cons(); exuart_init_cons(); imxuart_init_cons(); com_fdt_init_cons(); diff --git a/sys/arch/armv7/conf/GENERIC b/sys/arch/armv7/conf/GENERIC index 3bf925a2be7..b0a969af57c 100644 --- a/sys/arch/armv7/conf/GENERIC +++ b/sys/arch/armv7/conf/GENERIC @@ -1,4 +1,4 @@ -# $OpenBSD: GENERIC,v 1.134 2021/02/04 16:25:39 anton Exp $ +# $OpenBSD: GENERIC,v 1.135 2021/04/24 07:49:11 visa Exp $ # # For further information on compiling OpenBSD kernels, see the config(8) # man page. @@ -211,6 +211,9 @@ iic* at rkiic? rktemp* at fdt? dwdog* at fdt? +# Xilinx Zynq-7000 +cduart* at fdt? + # I2C devices abcrtc* at iic? # Abracon x80x RTC axppmic* at iic? # axp209 pmic diff --git a/sys/arch/armv7/conf/RAMDISK b/sys/arch/armv7/conf/RAMDISK index eedd98aeadd..5fd79188455 100644 --- a/sys/arch/armv7/conf/RAMDISK +++ b/sys/arch/armv7/conf/RAMDISK @@ -1,4 +1,4 @@ -# $OpenBSD: RAMDISK,v 1.120 2021/03/11 07:57:18 deraadt Exp $ +# $OpenBSD: RAMDISK,v 1.121 2021/04/24 07:49:11 visa Exp $ machine armv7 arm @@ -196,6 +196,9 @@ rkiic* at fdt? iic* at rkiic? dwdog* at fdt? +# Xilinx Zynq-7000 +cduart* at fdt? + axppmic* at iic? # axp209 pmic crosec* at iic? wskbd* at crosec? mux 1 diff --git a/sys/dev/fdt/cduart.c b/sys/dev/fdt/cduart.c new file mode 100644 index 00000000000..8e28d60aefe --- /dev/null +++ b/sys/dev/fdt/cduart.c @@ -0,0 +1,703 @@ +/* $OpenBSD: cduart.c,v 1.1 2021/04/24 07:49:11 visa Exp $ */ + +/* + * Copyright (c) 2021 Visa Hankala + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * Driver for Cadence UART. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + +#include +#include + +#define CDUART_CR 0x0000 +#define CDUART_CR_STOPBRK (1 << 8) +#define CDUART_CR_STARTBRK (1 << 7) +#define CDUART_CR_TORST (1 << 6) +#define CDUART_CR_TXDIS (1 << 5) +#define CDUART_CR_TXEN (1 << 4) +#define CDUART_CR_RXDIS (1 << 3) +#define CDUART_CR_RXEN (1 << 2) +#define CDUART_CR_TXRST (1 << 1) +#define CDUART_CR_RXRST (1 << 0) +#define CDUART_MR 0x0004 +#define CDUART_MR_CHMODE_MASK (0x3 << 8) +#define CDUART_MR_NBSTOP_MASK (0x3 << 6) +#define CDUART_MR_PAR_MASK (0x7 << 3) +#define CDUART_MR_PAR_NO (0x4 << 3) +#define CDUART_MR_PAR_FORCED1 (0x3 << 3) +#define CDUART_MR_PAR_FORCED0 (0x2 << 3) +#define CDUART_MR_PAR_ODD (0x1 << 3) +#define CDUART_MR_PAR_EVEN (0x0 << 3) +#define CDUART_MR_CHRL_MASK (0x3 << 1) +#define CDUART_MR_CHRL_C6 (0x3 << 1) +#define CDUART_MR_CHRL_C7 (0x2 << 1) +#define CDUART_MR_CHRL_C8 (0x0 << 1) +#define CDUART_MR_CLKSEL (1 << 0) +#define CDUART_IER 0x0008 +#define CDUART_IDR 0x000c +#define CDUART_IMR 0x0010 +#define CDUART_ISR 0x0014 +#define CDUART_ISR_TXOVR (1 << 12) +#define CDUART_ISR_TNFUL (1 << 11) +#define CDUART_ISR_TTRIG (1 << 10) +#define CDUART_IXR_DMS (1 << 9) +#define CDUART_IXR_TOUT (1 << 8) +#define CDUART_IXR_PARITY (1 << 7) +#define CDUART_IXR_FRAMING (1 << 6) +#define CDUART_IXR_RXOVR (1 << 5) +#define CDUART_IXR_TXFULL (1 << 4) +#define CDUART_IXR_TXEMPTY (1 << 3) +#define CDUART_IXR_RXFULL (1 << 2) +#define CDUART_IXR_RXEMPTY (1 << 1) +#define CDUART_IXR_RTRIG (1 << 0) +#define CDUART_RXTOUT 0x001c +#define CDUART_RXWM 0x0020 +#define CDUART_SR 0x002c +#define CDUART_SR_TNFUL (1 << 14) +#define CDUART_SR_TTRIG (1 << 13) +#define CDUART_SR_FLOWDEL (1 << 12) +#define CDUART_SR_TACTIVE (1 << 11) +#define CDUART_SR_RACTIVE (1 << 10) +#define CDUART_SR_TXFULL (1 << 4) +#define CDUART_SR_TXEMPTY (1 << 3) +#define CDUART_SR_RXFULL (1 << 2) +#define CDUART_SR_RXEMPTY (1 << 1) +#define CDUART_SR_RXOVR (1 << 0) +#define CDUART_FIFO 0x0030 + +#define CDUART_SPACE_SIZE 0x0048 + +#define CDUART_FIFOSIZE 64 +#define CDUART_IBUFSIZE 128 + +struct cduart_softc { + struct device sc_dev; + bus_space_tag_t sc_iot; + bus_space_handle_t sc_ioh; + void *sc_ih; + void *sc_si; + + struct tty *sc_tty; + uint8_t sc_cua; + + struct timeout sc_diag_tmo; + int sc_overflows; + int sc_floods; + int sc_errors; + + int sc_ibufs[2][CDUART_IBUFSIZE]; + int *sc_ibuf; + int *sc_ibufend; + int *sc_ibufp; +}; + +int cduart_match(struct device *, void *, void *); +void cduart_attach(struct device *, struct device *, void *); +void cduart_diag(void *); +int cduart_intr(void *); +void cduart_softintr(void *); + +struct tty *cduarttty(dev_t); +struct cduart_softc *cduart_sc(dev_t); + +int cduartparam(struct tty *, struct termios *); +void cduartstart(struct tty *); + +int cduartcnattach(bus_space_tag_t, bus_addr_t, int, tcflag_t); +void cduartcnprobe(struct consdev *); +void cduartcninit(struct consdev *); +int cduartcngetc(dev_t); +void cduartcnputc(dev_t, int); +void cduartcnpollc(dev_t, int); + +cdev_decl(com); +cdev_decl(cduart); + +const struct cfattach cduart_ca = { + sizeof(struct cduart_softc), cduart_match, cduart_attach +}; + +struct cfdriver cduart_cd = { + NULL, "cduart", DV_DULL +}; + +bus_space_tag_t cduartconsiot; +bus_space_handle_t cduartconsioh; +int cduartconsrate; +tcflag_t cduartconscflag; +struct cdevsw cduartdev = cdev_tty_init(3, cduart); + +#define DEVUNIT(x) (minor(x) & 0x7f) +#define DEVCUA(x) (minor(x) & 0x80) + +static inline uint32_t +cduart_read(struct cduart_softc *sc, uint32_t reg) +{ + return bus_space_read_4(sc->sc_iot, sc->sc_ioh, reg); +} + +static inline void +cduart_write(struct cduart_softc *sc, uint32_t reg, uint32_t val) +{ + bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg, val); +} + +void +cduart_init_cons(void) +{ + struct fdt_reg reg; + void *node; + + if ((node = fdt_find_cons("cdns,uart-r1p8")) == NULL && + (node = fdt_find_cons("cdns,uart-r1p12")) == NULL) + return; + if (fdt_get_reg(node, 0, ®) != 0) + return; + + cduartcnattach(fdt_cons_bs_tag, reg.addr, B115200, TTYDEF_CFLAG); +} + +int +cduart_match(struct device *parent, void *match, void *aux) +{ + struct fdt_attach_args *faa = aux; + + return OF_is_compatible(faa->fa_node, "cdns,uart-r1p8") || + OF_is_compatible(faa->fa_node, "cdns,uart-r1p12"); +} + +void +cduart_attach(struct device *parent, struct device *self, void *aux) +{ + struct fdt_attach_args *faa = aux; + struct cduart_softc *sc = (struct cduart_softc *)self; + uint32_t cr, isr; + int maj; + + if (faa->fa_nreg < 1) { + printf(": no registers\n"); + return; + } + + sc->sc_iot = faa->fa_iot; + if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, + faa->fa_reg[0].size, 0, &sc->sc_ioh) != 0) { + printf(": can't map registers\n"); + return; + } + + /* Disable all interrupts. */ + cduart_write(sc, CDUART_IDR, ~0U); + + /* Clear any pending interrupts. */ + isr = cduart_read(sc, CDUART_ISR); + cduart_write(sc, CDUART_ISR, isr); + + sc->sc_ih = fdt_intr_establish_idx(faa->fa_node, 0, IPL_TTY, + cduart_intr, sc, sc->sc_dev.dv_xname); + if (sc->sc_ih == NULL) { + printf(": can't establish interrupt\n"); + goto fail; + } + + timeout_set(&sc->sc_diag_tmo, cduart_diag, sc); + sc->sc_si = softintr_establish(IPL_TTY, cduart_softintr, sc); + if (sc->sc_si == NULL) { + printf(": can't establish soft interrupt\n"); + goto fail; + } + + if (faa->fa_node == stdout_node) { + /* Locate the major number. */ + for (maj = 0; maj < nchrdev; maj++) { + if (cdevsw[maj].d_open == cduartopen) + break; + } + KASSERT(maj < nchrdev); + cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); + printf(": console"); + } + + /* Enable transmitter and receiver. */ + cr = cduart_read(sc, CDUART_CR); + cr &= ~(CDUART_CR_TXDIS | CDUART_CR_RXDIS); + cr |= CDUART_CR_TXEN | CDUART_CR_RXEN; + cduart_write(sc, CDUART_CR, cr); + + printf("\n"); + + return; + +fail: + if (sc->sc_si != NULL) + softintr_disestablish(sc->sc_si); + if (sc->sc_ih != NULL) + fdt_intr_disestablish(sc->sc_ih); + if (sc->sc_ioh != 0) + bus_space_unmap(sc->sc_iot, sc->sc_ioh, CDUART_SPACE_SIZE); +} + +int +cduart_intr(void *arg) +{ + struct cduart_softc *sc = arg; + struct tty *tp = sc->sc_tty; + int *ibufp; + uint32_t isr, sr; + int c, handled = 0; + + if (tp == NULL) + return 0; + + isr = cduart_read(sc, CDUART_ISR); + cduart_write(sc, CDUART_ISR, isr); + + if ((isr & CDUART_IXR_TXEMPTY) && (tp->t_state & TS_BUSY)) { + tp->t_state &= ~TS_BUSY; + (*linesw[tp->t_line].l_start)(tp); + handled = 1; + } + + if (isr & (CDUART_IXR_TOUT | CDUART_IXR_RTRIG)) { + ibufp = sc->sc_ibufp; + for (;;) { + sr = cduart_read(sc, CDUART_SR); + if (sr & CDUART_SR_RXEMPTY) + break; + c = cduart_read(sc, CDUART_FIFO) & 0xff; + + if (ibufp < sc->sc_ibufend) { + *ibufp++ = c; + } else { + sc->sc_floods++; + if (sc->sc_errors++ == 0) + timeout_add_sec(&sc->sc_diag_tmo, 60); + } + } + if (sc->sc_ibufp != ibufp) { + sc->sc_ibufp = ibufp; + softintr_schedule(sc->sc_si); + } + handled = 1; + } + + if (isr & CDUART_IXR_RXOVR) { + sc->sc_overflows++; + if (sc->sc_errors++ == 0) + timeout_add_sec(&sc->sc_diag_tmo, 60); + handled = 1; + } + + return handled; +} + +void +cduart_softintr(void *arg) +{ + struct cduart_softc *sc = arg; + struct tty *tp = sc->sc_tty; + int *ibufend, *ibufp; + int s; + + s = spltty(); + + ibufp = sc->sc_ibuf; + ibufend = sc->sc_ibufp; + + if (ibufp == ibufend) { + splx(s); + return; + } + + sc->sc_ibufp = sc->sc_ibuf = (ibufp == sc->sc_ibufs[0]) ? + sc->sc_ibufs[1] : sc->sc_ibufs[0]; + sc->sc_ibufend = sc->sc_ibuf + CDUART_IBUFSIZE; + + if (tp == NULL || (tp->t_state & TS_ISOPEN) == 0) { + splx(s); + return; + } + + splx(s); + + while (ibufp < ibufend) + (*linesw[tp->t_line].l_rint)(*ibufp++, tp); +} + +void +cduart_diag(void *arg) +{ + struct cduart_softc *sc = arg; + int overflows, floods; + int s; + + s = spltty(); + sc->sc_errors = 0; + overflows = sc->sc_overflows; + sc->sc_overflows = 0; + floods = sc->sc_floods; + sc->sc_floods = 0; + splx(s); + log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf overflow%s\n", + sc->sc_dev.dv_xname, + overflows, overflows == 1 ? "" : "s", + floods, floods == 1 ? "" : "s"); +} + +int +cduartopen(dev_t dev, int flag, int mode, struct proc *p) +{ + struct cduart_softc *sc; + struct tty *tp; + uint32_t sr; + int error, s; + + sc = cduart_sc(dev); + if (sc == NULL) + return ENXIO; + + s = spltty(); + + if (sc->sc_tty == NULL) + sc->sc_tty = ttymalloc(0); + + tp = sc->sc_tty; + tp->t_oproc = cduartstart; + tp->t_param = cduartparam; + tp->t_dev = dev; + if ((tp->t_state & TS_ISOPEN) == 0) { + tp->t_state |= TS_WOPEN | TS_CARR_ON; + ttychars(tp); + tp->t_iflag = TTYDEF_IFLAG; + tp->t_oflag = TTYDEF_OFLAG; + tp->t_cflag = TTYDEF_CFLAG; + tp->t_lflag = TTYDEF_LFLAG; + tp->t_ispeed = B115200; /* XXX */ + tp->t_ospeed = tp->t_ispeed; + ttsetwater(tp); + + sc->sc_ibufp = sc->sc_ibuf = sc->sc_ibufs[0]; + sc->sc_ibufend = sc->sc_ibuf + CDUART_IBUFSIZE; + + cduart_write(sc, CDUART_RXTOUT, 10); + cduart_write(sc, CDUART_RXWM, CDUART_FIFOSIZE / 2); + + /* Clear any pending I/O. */ + for (;;) { + sr = cduart_read(sc, CDUART_SR); + if (sr & CDUART_SR_RXEMPTY) + break; + (void)cduart_read(sc, CDUART_FIFO); + } + + cduart_write(sc, CDUART_IER, + CDUART_IXR_TOUT | CDUART_IXR_RXOVR | CDUART_IXR_RTRIG); + } else if ((tp->t_state & TS_XCLUDE) && suser(p) != 0) { + splx(s); + return EBUSY; + } + + if (DEVCUA(dev)) { + if (tp->t_state & TS_ISOPEN) { + splx(s); + return EBUSY; + } + sc->sc_cua = 1; + } else { + if ((flag & O_NONBLOCK) && sc->sc_cua) { + splx(s); + return EBUSY; + } else { + while (sc->sc_cua) { + tp->t_state |= TS_WOPEN; + error = ttysleep(tp, &tp->t_rawq, + TTIPRI | PCATCH, ttopen); + if (error != 0 && (tp->t_state & TS_WOPEN)) { + tp->t_state &= ~TS_WOPEN; + splx(s); + return error; + } + } + } + } + + splx(s); + + return (*linesw[tp->t_line].l_open)(dev, tp, p); +} + +int +cduartclose(dev_t dev, int flag, int mode, struct proc *p) +{ + struct cduart_softc *sc; + struct tty *tp; + int s; + + sc = cduart_sc(dev); + tp = sc->sc_tty; + + if ((tp->t_state & TS_ISOPEN) == 0) + return 0; + + (*linesw[tp->t_line].l_close)(tp, flag, p); + s = spltty(); + /* Disable interrupts. */ + cduart_write(sc, CDUART_IDR, ~0U); + sc->sc_cua = 0; + splx(s); + ttyclose(tp); + + return 0; +} + +int +cduartread(dev_t dev, struct uio *uio, int flag) +{ + struct tty *tp; + + tp = cduarttty(dev); + if (tp == NULL) + return ENODEV; + + return (*linesw[tp->t_line].l_read)(tp, uio, flag); +} + +int +cduartwrite(dev_t dev, struct uio *uio, int flag) +{ + struct tty *tp; + + tp = cduarttty(dev); + if (tp == NULL) + return ENODEV; + + return (*linesw[tp->t_line].l_write)(tp, uio, flag); +} + +int +cduartioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) +{ + struct cduart_softc *sc; + struct tty *tp; + int error; + + sc = cduart_sc(dev); + if (sc == NULL) + return ENODEV; + + tp = sc->sc_tty; + if (tp == NULL) + return ENXIO; + + error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); + if (error >= 0) + return error; + + error = ttioctl(tp, cmd, data, flag, p); + if (error >= 0) + return error; + + /* XXX */ + switch (cmd) { + case TIOCSBRK: + case TIOCCBRK: + case TIOCSDTR: + case TIOCCDTR: + case TIOCMSET: + case TIOCMBIC: + case TIOCMGET: + case TIOCGFLAGS: + break; + case TIOCSFLAGS: + error = suser(p); + if (error != 0) + return EPERM; + break; + default: + return ENOTTY; + } + + return 0; +} + +int +cduartparam(struct tty *tp, struct termios *t) +{ + return 0; +} + +void +cduartstart(struct tty *tp) +{ + struct cduart_softc *sc; + uint32_t sr; + int s; + + sc = cduart_sc(tp->t_dev); + + s = spltty(); + if (tp->t_state & TS_BUSY) + goto out; + if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) + goto stopped; + ttwakeupwr(tp); + if (tp->t_outq.c_cc == 0) + goto stopped; + tp->t_state |= TS_BUSY; + + cduart_write(sc, CDUART_ISR, CDUART_IXR_TXEMPTY); + + sr = cduart_read(sc, CDUART_SR); + while ((sr & CDUART_SR_TXFULL) == 0 && tp->t_outq.c_cc != 0) { + cduart_write(sc, CDUART_FIFO, getc(&tp->t_outq)); + sr = cduart_read(sc, CDUART_SR); + } + + cduart_write(sc, CDUART_IER, CDUART_IXR_TXEMPTY); +out: + splx(s); + return; +stopped: + cduart_write(sc, CDUART_IDR, CDUART_IXR_TXEMPTY); + splx(s); +} + +int +cduartstop(struct tty *tp, int flag) +{ + return 0; +} + +struct tty * +cduarttty(dev_t dev) +{ + struct cduart_softc *sc; + + sc = cduart_sc(dev); + if (sc == NULL) + return NULL; + + return sc->sc_tty; +} + +struct cduart_softc * +cduart_sc(dev_t dev) +{ + int unit = DEVUNIT(dev); + + if (unit >= cduart_cd.cd_ndevs) + return NULL; + return (struct cduart_softc *)cduart_cd.cd_devs[unit]; +} + +struct consdev cduartcons = { + .cn_probe = NULL, + .cn_init = NULL, + .cn_getc = cduartcngetc, + .cn_putc = cduartcnputc, + .cn_pollc = cduartcnpollc, + .cn_bell = NULL, + .cn_dev = NODEV, + .cn_pri = CN_MIDPRI, +}; + +int +cduartcnattach(bus_space_tag_t iot, bus_addr_t iobase, int rate, + tcflag_t cflag) +{ + bus_space_handle_t ioh; + int maj; + + /* Look for major of com(4) to replace. */ + for (maj = 0; maj < nchrdev; maj++) { + if (cdevsw[maj].d_open == comopen) + break; + } + if (maj == nchrdev) + return ENXIO; + + if (bus_space_map(iot, iobase, CDUART_SPACE_SIZE, 0, &ioh) != 0) + return ENOMEM; + + cn_tab = &cduartcons; + cn_tab->cn_dev = makedev(maj, 0); + cdevsw[maj] = cduartdev; + + cduartconsiot = iot; + cduartconsioh = ioh; + cduartconsrate = rate; + cduartconscflag = cflag; + + return 0; +} + +void +cduartcnprobe(struct consdev *cp) +{ +} + +void +cduartcninit(struct consdev *cp) +{ +} + +int +cduartcngetc(dev_t dev) +{ + int s; + uint8_t c; + + s = splhigh(); + while (bus_space_read_4(cduartconsiot, cduartconsioh, + CDUART_SR) & CDUART_SR_RXEMPTY) + CPU_BUSY_CYCLE(); + c = bus_space_read_4(cduartconsiot, cduartconsioh, CDUART_FIFO); + splx(s); + + return c; +} + +void +cduartcnputc(dev_t dev, int c) +{ + int s; + + s = splhigh(); + while (bus_space_read_4(cduartconsiot, cduartconsioh, + CDUART_SR) & CDUART_SR_TXFULL) + CPU_BUSY_CYCLE(); + bus_space_write_4(cduartconsiot, cduartconsioh, CDUART_FIFO, c); + splx(s); +} + +void +cduartcnpollc(dev_t dev, int on) +{ +} diff --git a/sys/dev/fdt/files.fdt b/sys/dev/fdt/files.fdt index 88d3b3402dc..9a84a2b9456 100644 --- a/sys/dev/fdt/files.fdt +++ b/sys/dev/fdt/files.fdt @@ -1,4 +1,4 @@ -# $OpenBSD: files.fdt,v 1.148 2021/04/24 05:14:45 jsg Exp $ +# $OpenBSD: files.fdt,v 1.149 2021/04/24 07:49:11 visa Exp $ # # Config file and device description for machine-independent FDT code. # Included by ports that need it. @@ -276,6 +276,10 @@ device amlusbphy attach amlusbphy at fdt file dev/fdt/amlusbphy.c amlusbphy +device cduart +attach cduart at fdt +file dev/fdt/cduart.c cduart + device hiclock attach hiclock at fdt file dev/fdt/hiclock.c hiclock -- 2.20.1