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      1 /*	$NetBSD: imx51_spi.c,v 1.3 2019/09/27 02:59:21 hkenken Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014  Genetec Corporation.  All rights reserved.
      5  * Written by Hashimoto Kenichi for Genetec Corporation.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: imx51_spi.c,v 1.3 2019/09/27 02:59:21 hkenken Exp $");
     31 
     32 #include "locators.h"
     33 #include "opt_imx.h"
     34 #include "opt_imxspi.h"
     35 
     36 #include <sys/param.h>
     37 #include <sys/bus.h>
     38 #include <sys/device.h>
     39 
     40 #include <arm/imx/imxspivar.h>
     41 #include <arm/imx/imx51reg.h>
     42 #include <arm/imx/imx51var.h>
     43 #include <arm/imx/imx51_ccmvar.h>
     44 
     45 struct imx51spi_softc {
     46 	struct imxspi_softc sc_spi; /* Must be first */
     47 
     48 	struct spi_chipset_tag sc_tag;
     49 };
     50 
     51 CFATTACH_DECL_NEW(imx51_spi, sizeof(struct imx51spi_softc),
     52     imxspi_match, imxspi_attach, NULL, NULL);
     53 
     54 static int
     55 imxspi_cs_enable(void *arg, int slave)
     56 {
     57 	return 0;
     58 }
     59 
     60 static int
     61 imxspi_cs_disable(void *arg, int slave)
     62 {
     63 	return 0;
     64 }
     65 
     66 int
     67 imxspi_match(device_t parent, cfdata_t cf, void *aux)
     68 {
     69 	if (strcmp(cf->cf_name, "imxspi") == 0)
     70 		return 1;
     71 
     72 	return 0;
     73 }
     74 
     75 void
     76 imxspi_attach(device_t parent, device_t self, void *aux)
     77 {
     78 	struct imx51spi_softc *isc = device_private(self);
     79 	struct imxspi_softc *sc = &isc->sc_spi;
     80 	struct axi_attach_args *aa = aux;
     81 	struct imxspi_attach_args saa;
     82 	int cf_flags = device_cfdata(self)->cf_flags;
     83 	bus_addr_t addr;
     84 	bus_size_t size;
     85 	int error;
     86 
     87 	addr = aa->aa_addr;
     88 	size = aa->aa_size;
     89 	if (size <= 0)
     90 		size = SPI_SIZE;
     91 
     92 	sc->sc_tag.cookie = sc;
     93 	sc->sc_tag.spi_cs_enable = imxspi_cs_enable;
     94 	sc->sc_tag.spi_cs_disable = imxspi_cs_disable;
     95 
     96 	sc->sc_iot = aa->aa_iot;
     97 	sc->sc_enhanced = cf_flags;
     98 	if (sc->sc_enhanced)
     99 		sc->sc_type = IMX51_ECSPI;
    100 	else
    101 		sc->sc_type = IMX35_CSPI;
    102 
    103 	sc->sc_nslaves = IMXSPINSLAVES;
    104 	sc->sc_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT);
    105 	sc->sc_tag = &sc->sc_tag;
    106 
    107 	if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh)) {
    108 		aprint_error_dev(sc->sc_dev, "couldn't map registers\n");
    109 		return;
    110 	}
    111 
    112 	/* enable device interrupts */
    113 	sc->sc_ih = intr_establish(aa->aa_irq, IPL_BIO, IST_LEVEL,
    114 	    imxspi_intr, sc);
    115 
    116 	imxspi_attach_common(self);
    117 }
    118