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com_acpi.c revision 1.40
      1  1.40   mlelstv /* $NetBSD: com_acpi.c,v 1.40 2019/03/01 09:21:06 mlelstv Exp $ */
      2   1.1  jmcneill 
      3   1.1  jmcneill /*
      4   1.1  jmcneill  * Copyright (c) 2002 Jared D. McNeill <jmcneill (at) invisible.ca>
      5   1.1  jmcneill  * All rights reserved.
      6   1.1  jmcneill  *
      7   1.1  jmcneill  * Redistribution and use in source and binary forms, with or without
      8   1.1  jmcneill  * modification, are permitted provided that the following conditions
      9   1.1  jmcneill  * are met:
     10   1.1  jmcneill  * 1. Redistributions of source code must retain the above copyright
     11   1.1  jmcneill  *    notice, this list of conditions and the following disclaimer.
     12   1.1  jmcneill  * 2. The name of the author may not be used to endorse or promote products
     13   1.1  jmcneill  *    derived from this software without specific prior written permission.
     14   1.1  jmcneill  *
     15   1.1  jmcneill  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16   1.1  jmcneill  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17   1.1  jmcneill  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18   1.1  jmcneill  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19   1.1  jmcneill  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20   1.1  jmcneill  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21   1.1  jmcneill  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22   1.1  jmcneill  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23   1.1  jmcneill  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24   1.1  jmcneill  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25   1.1  jmcneill  * SUCH DAMAGE.
     26   1.1  jmcneill  */
     27   1.1  jmcneill 
     28   1.1  jmcneill #include <sys/cdefs.h>
     29  1.40   mlelstv __KERNEL_RCSID(0, "$NetBSD: com_acpi.c,v 1.40 2019/03/01 09:21:06 mlelstv Exp $");
     30   1.1  jmcneill 
     31   1.1  jmcneill #include <sys/param.h>
     32  1.31    jruoho #include <sys/device.h>
     33   1.1  jmcneill #include <sys/systm.h>
     34   1.1  jmcneill #include <sys/termios.h>
     35   1.1  jmcneill 
     36   1.1  jmcneill #include <dev/acpi/acpivar.h>
     37  1.37  jmcneill #include <dev/acpi/acpi_intr.h>
     38   1.1  jmcneill 
     39   1.1  jmcneill #include <dev/ic/comvar.h>
     40   1.1  jmcneill 
     41  1.27      cube static int	com_acpi_match(device_t, cfdata_t , void *);
     42  1.27      cube static void	com_acpi_attach(device_t, device_t, void *);
     43   1.1  jmcneill 
     44   1.1  jmcneill struct com_acpi_softc {
     45   1.1  jmcneill 	struct com_softc sc_com;
     46   1.1  jmcneill 	void *sc_ih;
     47   1.1  jmcneill };
     48   1.1  jmcneill 
     49  1.27      cube CFATTACH_DECL_NEW(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match,
     50  1.30    dyoung     com_acpi_attach, NULL, NULL);
     51   1.1  jmcneill 
     52   1.1  jmcneill /*
     53   1.1  jmcneill  * Supported device IDs
     54   1.1  jmcneill  */
     55   1.1  jmcneill 
     56   1.2      matt static const char * const com_acpi_ids[] = {
     57   1.1  jmcneill 	"PNP0500",	/* Standard PC COM port */
     58   1.1  jmcneill 	"PNP0501",	/* 16550A-compatible COM port */
     59   1.1  jmcneill 	"PNP0510",	/* Generic IRDA-compatible device */
     60   1.1  jmcneill 	"PNP0511",	/* Generic IRDA-compatible device */
     61   1.6  jmcneill 	"IBM0071",	/* IBM ThinkPad IRDA device */
     62  1.12   mycroft 	"SMCF010",	/* SMC SuperIO IRDA device */
     63  1.17    rpaulo 	"NSC6001",	/* NSC IRDA device */
     64  1.23  christos 	"FUJ02E6",	/* Fujitsu Serial Pen Tablet */
     65  1.37  jmcneill 	"HISI0031",	/* Hisilicon UART */
     66  1.37  jmcneill 	"8250dw",	/* Designware APB UART */
     67  1.37  jmcneill 	NULL
     68  1.37  jmcneill };
     69  1.37  jmcneill 
     70  1.37  jmcneill /*
     71  1.37  jmcneill  * Subset of supported device IDs of type COM_TYPE_DW_APB
     72  1.37  jmcneill  */
     73  1.37  jmcneill static const char * const com_acpi_dw_ids[] = {
     74  1.37  jmcneill 	"HISI0031",	/* Hisilicon UART */
     75  1.37  jmcneill 	"8250dw",	/* Designware APB UART */
     76   1.1  jmcneill 	NULL
     77   1.1  jmcneill };
     78   1.1  jmcneill 
     79   1.1  jmcneill /*
     80   1.1  jmcneill  * com_acpi_match: autoconf(9) match routine
     81   1.1  jmcneill  */
     82  1.15     kochi static int
     83  1.27      cube com_acpi_match(device_t parent, cfdata_t match, void *aux)
     84   1.1  jmcneill {
     85   1.1  jmcneill 	struct acpi_attach_args *aa = aux;
     86   1.1  jmcneill 
     87   1.1  jmcneill 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     88   1.1  jmcneill 		return 0;
     89   1.1  jmcneill 
     90  1.35     ryoon 	return acpi_match_hid(aa->aa_node->ad_devinfo, com_acpi_ids);
     91   1.1  jmcneill }
     92   1.1  jmcneill 
     93   1.1  jmcneill /*
     94   1.1  jmcneill  * com_acpi_attach: autoconf(9) attach routine
     95   1.1  jmcneill  */
     96  1.15     kochi static void
     97  1.27      cube com_acpi_attach(device_t parent, device_t self, void *aux)
     98   1.1  jmcneill {
     99  1.27      cube 	struct com_acpi_softc *asc = device_private(self);
    100   1.1  jmcneill 	struct com_softc *sc = &asc->sc_com;
    101   1.1  jmcneill 	struct acpi_attach_args *aa = aux;
    102   1.1  jmcneill 	struct acpi_resources res;
    103   1.1  jmcneill 	struct acpi_io *io;
    104  1.29  kiyohara 	struct acpi_mem *mem;
    105   1.1  jmcneill 	struct acpi_irq *irq;
    106  1.29  kiyohara 	bus_space_tag_t iot;
    107  1.19   gdamore 	bus_space_handle_t ioh;
    108  1.29  kiyohara 	bus_addr_t base;
    109  1.29  kiyohara 	bus_size_t size;
    110   1.1  jmcneill 	ACPI_STATUS rv;
    111  1.37  jmcneill 	ACPI_INTEGER clock_freq;
    112   1.1  jmcneill 
    113  1.27      cube 	sc->sc_dev = self;
    114  1.27      cube 
    115   1.1  jmcneill 	/* parse resources */
    116  1.27      cube 	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
    117  1.13     kochi 	    &res, &acpi_resource_parse_ops_default);
    118  1.11   mycroft 	if (ACPI_FAILURE(rv))
    119   1.1  jmcneill 		return;
    120   1.1  jmcneill 
    121   1.1  jmcneill 	/* find our i/o registers */
    122   1.1  jmcneill 	io = acpi_res_io(&res, 0);
    123  1.29  kiyohara 	if (io != NULL) {
    124  1.29  kiyohara 		iot = aa->aa_iot;
    125  1.29  kiyohara 		base = io->ar_base;
    126  1.29  kiyohara 		size = io->ar_length;
    127  1.29  kiyohara 	} else {
    128  1.29  kiyohara 		mem = acpi_res_mem(&res, 0);
    129  1.29  kiyohara 		if (mem != NULL) {
    130  1.29  kiyohara 			iot = aa->aa_memt;
    131  1.29  kiyohara 			base = mem->ar_base;
    132  1.29  kiyohara 			size = mem->ar_length;
    133  1.29  kiyohara 		} else {
    134  1.33   msaitoh 			aprint_error_dev(self, "unable to find i/o register "
    135  1.33   msaitoh 			    "and memory resource\n");
    136  1.29  kiyohara 			goto out;
    137  1.29  kiyohara 		}
    138   1.1  jmcneill 	}
    139   1.1  jmcneill 
    140   1.1  jmcneill 	/* find our IRQ */
    141   1.1  jmcneill 	irq = acpi_res_irq(&res, 0);
    142   1.1  jmcneill 	if (irq == NULL) {
    143  1.27      cube 		aprint_error_dev(self, "unable to find irq resource\n");
    144  1.14     kochi 		goto out;
    145   1.1  jmcneill 	}
    146   1.1  jmcneill 
    147  1.29  kiyohara 	if (!com_is_console(iot, base, &ioh))
    148  1.29  kiyohara 		if (bus_space_map(iot, base, size, 0, &ioh)) {
    149  1.27      cube 			aprint_error_dev(self, "can't map i/o space\n");
    150  1.14     kochi 			goto out;
    151   1.5  jmcneill 		}
    152  1.36   thorpej 	com_init_regs(&sc->sc_regs, iot, ioh, base);
    153   1.1  jmcneill 
    154  1.27      cube 	aprint_normal("%s", device_xname(self));
    155   1.1  jmcneill 
    156  1.37  jmcneill 	if (acpi_match_hid(aa->aa_node->ad_devinfo, com_acpi_dw_ids) != 0) {
    157  1.37  jmcneill 		sc->sc_type = COM_TYPE_DW_APB;
    158  1.37  jmcneill 		SET(sc->sc_hwflags, COM_HW_POLL);	/* XXX */
    159  1.37  jmcneill 	} else {
    160  1.37  jmcneill 		if (com_probe_subr(&sc->sc_regs) == 0) {
    161  1.37  jmcneill 			aprint_error(": com probe failed\n");
    162  1.37  jmcneill 			goto out;
    163  1.37  jmcneill 		}
    164   1.1  jmcneill 	}
    165   1.1  jmcneill 
    166  1.38  christos 	rv = acpi_dsd_integer(aa->aa_node->ad_handle, "clock-frequency",
    167  1.38  christos 	    &clock_freq);
    168  1.37  jmcneill 	if (ACPI_SUCCESS(rv))
    169  1.37  jmcneill 		sc->sc_frequency = clock_freq;
    170  1.37  jmcneill 	else
    171  1.37  jmcneill 		sc->sc_frequency = 115200 * 16;
    172   1.1  jmcneill 
    173   1.1  jmcneill 	com_attach_subr(sc);
    174   1.1  jmcneill 
    175  1.37  jmcneill 	if (!ISSET(sc->sc_hwflags, COM_HW_POLL))
    176  1.38  christos 		asc->sc_ih = acpi_intr_establish(self,
    177  1.40   mlelstv 		    (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
    178  1.37  jmcneill 		    IPL_SERIAL, true, comintr, sc, device_xname(self));
    179  1.25   xtraeme 
    180  1.25   xtraeme 	if (!pmf_device_register(self, NULL, com_resume))
    181  1.25   xtraeme 		aprint_error_dev(self, "couldn't establish a power handler\n");
    182  1.32  pgoyette 	goto cleanup;
    183  1.25   xtraeme 
    184  1.32  pgoyette 	/*
    185  1.32  pgoyette 	 * In case of irq resource or i/o space mapping error, just set
    186  1.32  pgoyette 	 * a NULL power handler.  This may allow us to sleep later on.
    187  1.32  pgoyette 	 */
    188  1.14     kochi  out:
    189  1.32  pgoyette 	if (!pmf_device_register(self, NULL, NULL))
    190  1.32  pgoyette 		aprint_error_dev(self, "couldn't establish a power handler\n");
    191  1.32  pgoyette 
    192  1.32  pgoyette  cleanup:
    193  1.14     kochi 	acpi_resource_cleanup(&res);
    194   1.1  jmcneill }
    195