/* $NetBSD: amps.c,v 1.24 2025/01/02 16:09:32 andvar Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Mark Brinicombe of Causality Limited. * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. * * Card driver and probe and attach functions to use generic 16550 com * driver for the Atomwide multiport serial podule */ /* * Thanks to Martin Coulson, Atomwide, for providing the hardware */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: amps.c,v 1.24 2025/01/02 16:09:32 andvar Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/ioctl.h> #include <sys/select.h> #include <sys/tty.h> #include <sys/proc.h> #include <sys/conf.h> #include <sys/file.h> #include <sys/uio.h> #include <sys/kernel.h> #include <sys/syslog.h> #include <sys/types.h> #include <sys/device.h> #include <sys/bus.h> #include <machine/intr.h> #include <machine/io.h> #include <acorn32/podulebus/podulebus.h> #include <acorn32/podulebus/ampsreg.h> #include <dev/ic/comreg.h> #include <dev/ic/comvar.h> #include <dev/podulebus/podules.h> #include "locators.h" /* * Atomwide Multi-port serial podule device. * * This probes and attaches the top level multi-port serial device to the * podulebus. It then configures the child com devices. */ /* * Atomwide Multi-port serial card softc structure. * * Contains the device node, podule information and global information * required by the driver such as the card version and the interrupt mask. */ struct amps_softc { device_t sc_dev; /* device node */ podule_t *sc_podule; /* Our podule info */ int sc_podule_number; /* Our podule number */ bus_space_tag_t sc_iot; /* Bus tag */ }; int amps_probe(device_t, cfdata_t, void *); void amps_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(amps, sizeof(struct amps_softc), amps_probe, amps_attach, NULL, NULL); int amps_print(void *, const char *); void amps_shutdown(void *); /* * Attach arguments for child devices. * Pass the podule details, the parent softc and the channel */ struct amps_attach_args { bus_space_tag_t aa_iot; /* bus space tag */ unsigned int aa_base; /* base address for port */ int aa_port; /* serial port number */ podulebus_intr_handle_t aa_irq; /* IRQ number */ }; /* * Define prototypes for custom bus space functions. */ /* Print function used during child config */ int amps_print(void *aux, const char *name) { struct amps_attach_args *aa = aux; if (!name) aprint_normal(", port %d", aa->aa_port); return(QUIET); } /* * Card probe function * * Just match the manufacturer and podule ID's */ int amps_probe(device_t parent, cfdata_t cf, void *aux) { struct podule_attach_args *pa = aux; return (pa->pa_product == PODULE_ATOMWIDE_SERIAL); } /* * Card attach function * * Identify the card version and configure any children. * Install a shutdown handler to kill interrupts on shutdown */ void amps_attach(device_t parent, device_t self, void *aux) { struct amps_softc *sc = device_private(self); struct podule_attach_args *pa = aux; struct amps_attach_args aa; /* Note the podule number and validate */ if (pa->pa_podule_number == -1) panic("Podule has disappeared !"); sc->sc_dev = self; sc->sc_podule_number = pa->pa_podule_number; sc->sc_podule = pa->pa_podule; podules[sc->sc_podule_number].attached = 1; sc->sc_iot = pa->pa_iot; /* Install a clean up handler to make sure IRQ's are disabled */ /* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL) panic("%s: Cannot install shutdown handler", device_xname(self));*/ /* Set the interrupt info for this podule */ /* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */ /* sc->sc_podule->irq_mask = ;*/ printf("\n"); /* Configure the children */ aa.aa_iot = sc->sc_iot; aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET; aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING; aa.aa_irq = pa->pa_podule->interrupt; for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) { aa.aa_base -= AMPS_PORT_SPACING; config_found(self, &aa, amps_print, CFARGS_NONE); } } /* * Card shutdown function * * Called via do_shutdown_hooks() during kernel shutdown. * Clear the cards's interrupt mask to stop any podule interrupts. */ /*void amps_shutdown(void *arg) { }*/ /* * Atomwide Multi-Port Serial probe and attach code for the com device. * * This provides a different pair of probe and attach functions * for attaching the com device (dev/ic/com.c) to the Atomwide serial card. */ struct com_amps_softc { struct com_softc sc_com; /* real "com" softc */ void *sc_ih; /* interrupt handler */ struct evcnt sc_intrcnt; /* interrupt count */ }; /* Prototypes for functions */ static int com_amps_probe (device_t, cfdata_t , void *); static void com_amps_attach (device_t, device_t, void *); /* device attach structure */ CFATTACH_DECL_NEW(com_amps, sizeof(struct com_amps_softc), com_amps_probe, com_amps_attach, NULL, NULL); /* * Controller probe function * * Map all the required I/O space for this channel, make sure interrupts * are disabled and probe the bus. */ int com_amps_probe(device_t parent, cfdata_t cf, void *aux) { bus_space_tag_t iot; bus_space_handle_t ioh; int iobase; int rv = 1; struct amps_attach_args *aa = aux; iot = aa->aa_iot; iobase = aa->aa_base; /* if it's in use as console, it's there. */ if (!com_is_console(iot, iobase, 0)) { if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { return 0; } /* * We don't use the generic comprobe1() function as it * is not good enough to identify which ports are present. * * Instead test for the presence of the scratch register */ bus_space_write_1(iot, ioh, com_scratch, 0x55); bus_space_write_1(iot, ioh, com_ier, 0); (void)bus_space_read_1(iot, ioh, com_data); if (bus_space_read_1(iot, ioh, com_scratch) != 0x55) rv = 0; bus_space_write_1(iot, ioh, com_scratch, 0xaa); bus_space_write_1(iot, ioh, com_ier, 0); (void)bus_space_read_1(iot, ioh, com_data); if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa) rv = 0; bus_space_unmap(iot, ioh, COM_NPORTS); } return (rv); } /* * Controller attach function * * Map all the required I/O space for this port and attach the driver * The generic attach will probe and attach any device. * Install an interrupt handler and we are ready to rock. */ void com_amps_attach(device_t parent, device_t self, void *aux) { struct com_amps_softc *asc = device_private(self); struct com_softc *sc = &asc->sc_com; u_int iobase; bus_space_tag_t iot; bus_space_handle_t ioh; struct amps_attach_args *aa = aux; sc->sc_dev = self; iot = aa->aa_iot; iobase = aa->aa_base; if (!com_is_console(iot, iobase, &ioh) && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) panic("comattach: io mapping failed"); com_init_regs(&sc->sc_regs, iot, ioh, iobase); sc->sc_frequency = AMPS_FREQ; com_attach_subr(sc); evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, device_xname(self), "intr"); asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr, sc, &asc->sc_intrcnt); }
