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imx51_esdhc.c revision 1.1.2.2 
      1 /*	$NetBSD: imx51_esdhc.c,v 1.1.2.2 2012/04/29 23:04:38 mrg 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 1.1.2.2 2012/04/29 23:04:38 mrg Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/device.h>
     37 #include <sys/systm.h>
     38 #include <sys/bus.h>
     39 #include <sys/pmf.h>
     40 
     41 #include <machine/intr.h>
     42 
     43 #include <dev/sdmmc/sdhcvar.h>
     44 #include <dev/sdmmc/sdmmcvar.h>
     45 
     46 #include <arm/imx/imx51reg.h>
     47 #include <arm/imx/imx51var.h>
     48 #include <arm/imx/imx51_ccmvar.h>
     49 
     50 struct sdhc_axi_softc {
     51 	struct sdhc_softc  sc_sdhc;
     52 	/* we have only one slot */
     53 	struct sdhc_host *sc_hosts[1];
     54 
     55 	void *sc_ih;
     56 };
     57 
     58 static int sdhc_match(device_t, cfdata_t, void *);
     59 static void sdhc_attach(device_t, device_t, void *);
     60 
     61 CFATTACH_DECL_NEW(sdhc_axi, sizeof(struct sdhc_axi_softc),
     62     sdhc_match, sdhc_attach, NULL, NULL);
     63 
     64 static int
     65 sdhc_match(device_t parent, cfdata_t cf, void *aux)
     66 {
     67 
     68 	struct axi_attach_args *aa = aux;
     69 
     70 	switch (aa->aa_addr) {
     71 	case ESDHC1_BASE:
     72 	case ESDHC2_BASE:
     73 		return 1;
     74 	}
     75 
     76 	return 0;
     77 }
     78 
     79 static void
     80 sdhc_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct sdhc_axi_softc *sc = device_private(self);
     83 	struct axi_attach_args *aa = aux;
     84 	bus_space_tag_t iot = aa->aa_iot;
     85 	bus_space_handle_t ioh;
     86 	u_int perclk;
     87 
     88 	sc->sc_sdhc.sc_dev = self;
     89 
     90 	sc->sc_sdhc.sc_dmat = aa->aa_dmat;
     91 
     92 	if (bus_space_map(iot, aa->aa_addr, ESDHC_SIZE, 0, &ioh)) {
     93 		aprint_error_dev(self, "can't map\n");
     94 		return;
     95 	}
     96 
     97 	aprint_normal(": SD/MMC host controller\n");
     98 	aprint_naive("\n");
     99 
    100 
    101 	sc->sc_sdhc.sc_host = sc->sc_hosts;
    102 	/* base clock frequency in kHz */
    103 	perclk = imx51_get_clock(IMX51CLK_PERCLK_ROOT);
    104 	sc->sc_sdhc.sc_clkbase = perclk / 1000;
    105 	sc->sc_sdhc.sc_flags |= SDHC_FLAG_HAVE_DVS |
    106 		SDHC_FLAG_NO_PWR0 |
    107 		SDHC_FLAG_32BIT_ACCESS |
    108 		SDHC_FLAG_ENHANCED;
    109 
    110 	sc->sc_ih = intr_establish(aa->aa_irq, IPL_SDMMC, IST_LEVEL,
    111 	    sdhc_intr, &sc->sc_sdhc);
    112 
    113 	if (sc->sc_ih == NULL) {
    114 		aprint_error_dev(self, "can't establish interrupt\n");
    115 		return;
    116 	}
    117 
    118 	if (sdhc_host_found(&sc->sc_sdhc, iot, ioh, ESDHC_SIZE)) {
    119 		aprint_error_dev(self, "can't initialize host\n");
    120 		return;
    121 	}
    122 
    123 	if (!pmf_device_register1(self, sdhc_suspend, sdhc_resume,
    124 		sdhc_shutdown)) {
    125 		aprint_error_dev(self,
    126 		    "can't establish power hook\n");
    127 	}
    128 }
    129