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      1 /*	$NetBSD: imx51_esdhc.c,v 1.4 2018/06/06 01:49:07 maya Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012  Genetec Corporation.  All rights reserved.
      5  * Written by Hiroyuki Bessho 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
     13  *    copyright notice, this list of conditions and the following
     14  *    disclaimer in the documentation and/or other materials provided
     15  *    with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
     18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
     20  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS
     21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
     24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     27  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: imx51_esdhc.c,v 1.4 2018/06/06 01:49:07 maya Exp $");
     34 
     35 #include "opt_imx.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/device.h>
     39 #include <sys/systm.h>
     40 #include <sys/bus.h>
     41 #include <sys/pmf.h>
     42 
     43 #include <machine/intr.h>
     44 
     45 #include <dev/sdmmc/sdhcvar.h>
     46 #include <dev/sdmmc/sdmmcvar.h>
     47 
     48 #include <arm/imx/imx51reg.h>
     49 #include <arm/imx/imx51var.h>
     50 #include <arm/imx/imx51_ccmvar.h>
     51 
     52 struct sdhc_axi_softc {
     53 	struct sdhc_softc  sc_sdhc;
     54 	/* we have only one slot */
     55 	struct sdhc_host *sc_hosts[1];
     56 
     57 	void *sc_ih;
     58 };
     59 
     60 static int sdhc_match(device_t, cfdata_t, void *);
     61 static void sdhc_attach(device_t, device_t, void *);
     62 
     63 CFATTACH_DECL_NEW(sdhc_axi, sizeof(struct sdhc_axi_softc),
     64     sdhc_match, sdhc_attach, NULL, NULL);
     65 
     66 static int
     67 sdhc_match(device_t parent, cfdata_t cf, void *aux)
     68 {
     69 
     70 	struct axi_attach_args *aa = aux;
     71 
     72 	switch (aa->aa_addr) {
     73 	case ESDHC1_BASE:
     74 	case ESDHC2_BASE:
     75 	case ESDHC3_BASE:
     76 	case ESDHC4_BASE:
     77 		return 1;
     78 	}
     79 
     80 	return 0;
     81 }
     82 
     83 static void
     84 sdhc_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct sdhc_axi_softc *sc = device_private(self);
     87 	struct axi_attach_args *aa = aux;
     88 	bus_space_tag_t iot = aa->aa_iot;
     89 	bus_space_handle_t ioh;
     90 	u_int perclk = 0;
     91 
     92 	sc->sc_sdhc.sc_dev = self;
     93 
     94 	sc->sc_sdhc.sc_dmat = aa->aa_dmat;
     95 
     96 	if (bus_space_map(iot, aa->aa_addr, ESDHC_SIZE, 0, &ioh)) {
     97 		aprint_error_dev(self, "can't map\n");
     98 		return;
     99 	}
    100 
    101 	aprint_normal(": SD/MMC host controller\n");
    102 	aprint_naive("\n");
    103 	sc->sc_sdhc.sc_host = sc->sc_hosts;
    104 	/* base clock frequency in kHz */
    105 	switch (aa->aa_addr) {
    106 	case ESDHC1_BASE:
    107 		perclk = imx51_get_clock(IMX51CLK_ESDHC1_CLK_ROOT);
    108 		break;
    109 	case ESDHC2_BASE:
    110 		perclk = imx51_get_clock(IMX51CLK_ESDHC2_CLK_ROOT);
    111 		break;
    112 	case ESDHC3_BASE:
    113 		perclk = imx51_get_clock(IMX51CLK_ESDHC3_CLK_ROOT);
    114 		break;
    115 	case ESDHC4_BASE:
    116 		perclk = imx51_get_clock(IMX51CLK_ESDHC4_CLK_ROOT);
    117 		break;
    118 	}
    119 	sc->sc_sdhc.sc_clkbase = perclk / 1000;
    120 	sc->sc_sdhc.sc_flags |= SDHC_FLAG_USE_DMA;
    121 	sc->sc_sdhc.sc_flags |= SDHC_FLAG_HAVE_DVS |
    122 		SDHC_FLAG_NO_PWR0 |
    123 		SDHC_FLAG_32BIT_ACCESS |
    124 		SDHC_FLAG_ENHANCED;
    125 
    126 	sc->sc_ih = intr_establish(aa->aa_irq, IPL_SDMMC, IST_LEVEL,
    127 	    sdhc_intr, &sc->sc_sdhc);
    128 
    129 	if (sc->sc_ih == NULL) {
    130 		aprint_error_dev(self, "can't establish interrupt\n");
    131 		return;
    132 	}
    133 
    134 	if (sdhc_host_found(&sc->sc_sdhc, iot, ioh, ESDHC_SIZE)) {
    135 		aprint_error_dev(self, "can't initialize host\n");
    136 		return;
    137 	}
    138 
    139 	if (!pmf_device_register1(self, sdhc_suspend, sdhc_resume,
    140 		sdhc_shutdown)) {
    141 		aprint_error_dev(self,
    142 		    "can't establish power hook\n");
    143 	}
    144 }
    145