/* $NetBSD: com_aubus.c,v 1.9 2019/01/11 23:10:40 thorpej Exp $ */ /* * Copyright 2001 Wasabi Systems, Inc. * All rights reserved. * * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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 __KERNEL_RCSID(0, "$NetBSD: com_aubus.c,v 1.9 2019/01/11 23:10:40 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include struct com_aubus_softc { struct com_softc sc_com; int sc_irq; void *sc_ih; }; static int com_aubus_probe(device_t, cfdata_t , void *); static void com_aubus_attach(device_t, device_t, void *); static int com_aubus_enable(struct com_softc *); static void com_aubus_disable(struct com_softc *); static void com_aubus_init_regs(struct com_regs *, bus_space_tag_t, bus_space_handle_t, bus_addr_t); CFATTACH_DECL_NEW(com_aubus, sizeof(struct com_aubus_softc), com_aubus_probe, com_aubus_attach, NULL, NULL); #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ int com_aubus_probe(device_t parent, cfdata_t cf, void *aux) { struct aubus_attach_args *aa = aux; /* match only aucom devices */ if (strcmp(aa->aa_name, cf->cf_name) == 0) return (1); return (0); } void com_aubus_attach(device_t parent, device_t self, void *aux) { struct com_aubus_softc *asc = device_private(self); struct com_softc *sc = &asc->sc_com; struct aubus_attach_args *aa = aux; bus_space_handle_t bsh; int addr = aa->aa_addr; sc->sc_dev = self; asc->sc_irq = aa->aa_irq[0]; if (com_is_console(aa->aa_st, addr, &bsh) == 0 && bus_space_map(aa->aa_st, addr, AUCOM_NPORTS, 0, &sc->sc_regs.cr_ioh) != 0) { aprint_error(": can't map i/o space\n"); return; } com_aubus_init_regs(&sc->sc_regs, aa->aa_st, bsh, addr); /* * The input to the clock divider is the internal pbus clock (1/4 the * processor frequency). The actual baud rate of the interface will * be pbus_freq / CLKDIV. */ sc->sc_frequency = curcpu()->ci_cpu_freq / 4; sc->sc_hwflags = COM_HW_NO_TXPRELOAD; sc->sc_type = COM_TYPE_AU1x00; sc->enable = com_aubus_enable; sc->disable = com_aubus_disable; /* Enable UART so we can access it. */ com_aubus_enable(sc); sc->enabled = 1; /* Attach MI com driver. */ com_attach_subr(sc); /* Disable UART if it's not the console. (XXX kgdb?) */ if (!ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { com_aubus_disable(sc); sc->enabled = 0; } } int com_aubus_enable(struct com_softc *sc) { struct com_aubus_softc *asc = (void *)sc; /* XXX mi prototype */ /* Ignore requests to enable an already enabled console. */ if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE) && (asc->sc_ih != NULL)) return (0); /* Enable the UART module. */ bus_space_write_1(sc->sc_regs.cr_iot, sc->sc_regs.cr_ioh, AUCOM_MODCTL, UMC_ME | UMC_CE); /* Establish the interrupt. */ asc->sc_ih = au_intr_establish(asc->sc_irq, 0, IPL_SERIAL, IST_LEVEL, comintr, sc); if (asc->sc_ih == NULL) { aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n"); return (1); } return (0); } void com_aubus_disable(struct com_softc *sc) { struct com_aubus_softc *asc = (void *)sc; /* XXX mi prototype */ /* Ignore requests to disable the console. */ if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) return; /* Disestablish the interrupt. */ au_intr_disestablish(asc->sc_ih); /* Disable the UART module. */ bus_space_write_1(sc->sc_regs.cr_iot, sc->sc_regs.cr_ioh, AUCOM_MODCTL, 0); } static const bus_size_t com_aubus_regmap[COM_REGMAP_NENTRIES] = { [COM_REG_RXDATA] = AUCOM_RXDATA, [COM_REG_TXDATA] = AUCOM_TXDATA, [COM_REG_DLBL] = AUCOM_DLB, [COM_REG_DLBH] = AUCOM_DLB, [COM_REG_IER] = AUCOM_IER, [COM_REG_IIR] = AUCOM_IIR, [COM_REG_FIFO] = AUCOM_FIFO, [COM_REG_TCR] = AUCOM_FIFO, [COM_REG_LCR] = AUCOM_LCTL, [COM_REG_MCR] = AUCOM_MCR, [COM_REG_LSR] = AUCOM_LSR, [COM_REG_MSR] = AUCOM_MSR, }; void com_aubus_init_regs(struct com_regs *regsp, bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr) { com_init_regs(regsp, bst, bsh, addr); memcpy(regsp->cr_map, com_aubus_regmap, sizeof(regsp->cr_map)); regsp->cr_nports = AUCOM_NPORTS; } int com_aubus_cnattach(bus_addr_t addr, int baud) { struct com_regs regs; uint32_t sysfreq; com_aubus_init_regs(®s, aubus_st, (bus_space_handle_t)0/*XXX*/, addr); sysfreq = curcpu()->ci_cpu_freq / 4; return comcnattach1(®s, baud, sysfreq, COM_TYPE_AU1x00, CONMODE); }