IABSD.fr/src/sys/dev/acpi/com_acpi.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : kettenis
  Date : 2020-05-08 11:18:01
  Hash : f09f3dbf
  Message : Move parsing of _CRS into acpi(4) and pass the parsed address and interrupt information in struct acpi_attach_args. ok mpi@

• sys/dev/acpi/com_acpi.c

• /*	$OpenBSD: com_acpi.c,v 1.2 2020/05/08 11:18:01 kettenis Exp $	*/
  /*
   * Copyright (c) 2018 Mark Kettenis
   *
   * 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.
   */
  
  #include <sys/param.h>
  #include <sys/malloc.h>
  #include <sys/systm.h>
  #include <sys/tty.h>
  
  #include <dev/acpi/acpireg.h>
  #include <dev/acpi/acpivar.h>
  #include <dev/acpi/acpidev.h>
  #include <dev/acpi/amltypes.h>
  #include <dev/acpi/dsdt.h>
  
  #undef DEVNAME
  #include <dev/ic/comreg.h>
  #include <dev/ic/comvar.h>
  #include <dev/cons.h>
  
  #define com_usr 31	/* Synopsys DesignWare UART */
  
  struct com_acpi_softc {
  	struct com_softc sc;
  	struct acpi_softc *sc_acpi;
  	struct aml_node *sc_node;
  	void		*sc_ih;
  };
  
  int	com_acpi_match(struct device *, void *, void *);
  void	com_acpi_attach(struct device *, struct device *, void *);
  
  struct cfattach com_acpi_ca = {
  	sizeof(struct com_acpi_softc), com_acpi_match, com_acpi_attach
  };
  
  const char *com_hids[] = {
  	"HISI0031",
  	NULL
  };
  
  int	com_acpi_is_console(struct com_acpi_softc *);
  int	com_acpi_intr_designware(void *);
  
  int
  com_acpi_match(struct device *parent, void *match, void *aux)
  {
  	struct acpi_attach_args *aaa = aux;
  	struct cfdata *cf = match;
  
  	return acpi_matchhids(aaa, com_hids, cf->cf_driver->cd_name);
  }
  
  void
  com_acpi_attach(struct device *parent, struct device *self, void *aux)
  {
  	struct com_acpi_softc *sc = (struct com_acpi_softc *)self;
  	struct acpi_attach_args *aaa = aux;
  	uint32_t freq;
  
  	sc->sc_acpi = (struct acpi_softc *)parent;
  	sc->sc_node = aaa->aaa_node;
  	printf(" %s", sc->sc_node->name);
  
  	if (aaa->aaa_naddr < 1) {
  		printf(": no registers\n");
  		return;
  	}
  
  	if (aaa->aaa_nirq < 1) {
  		printf(": no interrupt\n");
  		return;
  	}
  
  	printf(" addr 0x%llx/0x%llx", aaa->aaa_addr[0], aaa->aaa_size[0]);
  	printf(" irq %d", aaa->aaa_irq[0]);
  
  	freq = acpi_getpropint(sc->sc_node, "clock-frequency", 0);
  
  	sc->sc.sc_iot = aaa->aaa_bst[0];
  	sc->sc.sc_iobase = aaa->aaa_addr[0];
  	sc->sc.sc_uarttype = COM_UART_16550;
  	sc->sc.sc_frequency = freq ? freq : COM_FREQ;
  
  	sc->sc.sc_reg_width = acpi_getpropint(sc->sc_node, "reg-io-width", 4);
  	sc->sc.sc_reg_shift = acpi_getpropint(sc->sc_node, "reg-shift", 2);
  
  	if (com_acpi_is_console(sc)) {
  		SET(sc->sc.sc_hwflags, COM_HW_CONSOLE);
  		SET(sc->sc.sc_swflags, COM_SW_SOFTCAR);
  		comconsfreq = sc->sc.sc_frequency;
  		comconsrate = B115200;
  	}
  
  	if (bus_space_map(sc->sc.sc_iot, aaa->aaa_addr[0], aaa->aaa_size[0],
  	    0, &sc->sc.sc_ioh)) {
  		printf(": can't map registers\n");
  		return;
  	}
  
  	sc->sc_ih = acpi_intr_establish(aaa->aaa_irq[0], aaa->aaa_irq_flags[0],
  	    IPL_TTY, com_acpi_intr_designware, sc, sc->sc.sc_dev.dv_xname);
  	if (sc->sc_ih == NULL) {
  		printf(": can't establish interrupt\n");
  		return;
  	}
  
  	com_attach_subr(&sc->sc);
  }
  
  int
  com_acpi_is_console(struct com_acpi_softc *sc)
  {
  	struct acpi_table_header *hdr;
  	struct acpi_spcr *spcr;
  	struct acpi_gas *base;
  	struct acpi_q *entry;
  
  	SIMPLEQ_FOREACH(entry, &sc->sc_acpi->sc_tables, q_next) {
  		hdr = entry->q_table;
  		if (strncmp(hdr->signature, SPCR_SIG,
  		    sizeof(hdr->signature)) == 0) {
  			spcr = entry->q_table;
  			base = &spcr->base_address;
  			if (base->address_space_id == GAS_SYSTEM_MEMORY &&
  			    base->address == sc->sc.sc_iobase)
  				return 1;
  		}
  	}
  
  	return 0;
  }
  
  int
  com_acpi_intr_designware(void *cookie)
  {
  	struct com_softc *sc = cookie;
  
  	com_read_reg(sc, com_usr);
  
  	return comintr(sc);
  }