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mvsoc_sdhc.c revision 1.1.4.2 
      1 /*	$NetBSD: mvsoc_sdhc.c,v 1.1.4.2 2017/02/05 13:40:04 skrll Exp $	*/
      2 /*
      3  * Copyright (c) 2016 KIYOHARA Takashi
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: mvsoc_sdhc.c,v 1.1.4.2 2017/02/05 13:40:04 skrll Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/bus.h>
     33 #include <sys/device.h>
     34 #include <sys/errno.h>
     35 #include <sys/malloc.h>
     36 #include <sys/systm.h>
     37 
     38 #include <dev/marvell/marvellreg.h>
     39 #include <dev/marvell/marvellvar.h>
     40 
     41 #include <dev/sdmmc/sdhcreg.h>
     42 #include <dev/sdmmc/sdhcvar.h>
     43 
     44 #define MVSOC_SDHC_SIZE		0x2000
     45 #define MVSOC_SDHC_REG_SIZE	SDHC_CAPABILITIES2
     46 
     47 #define MVSOC_SDHC_MCR0		  0x48
     48 #define MVSOC_SDHC_MCR1		  0x4a
     49 #define MVSOC_SDHC_C1R		  0x6a
     50 #define   SDHC_C1R_CRC16_CHK_EN		(1 << 2)
     51 
     52 static int mvsoc_sdhc_match(device_t, cfdata_t, void *);
     53 static void mvsoc_sdhc_attach(device_t, device_t, void *);
     54 
     55 CFATTACH_DECL_NEW(mvsoc_sdhc, sizeof(struct sdhc_softc),
     56     mvsoc_sdhc_match, mvsoc_sdhc_attach, NULL, NULL);
     57 
     58 static int
     59 mvsoc_sdhc_match(device_t parent, cfdata_t match, void *aux)
     60 {
     61 	struct marvell_attach_args *mva = aux;
     62 
     63 	if (strcmp(mva->mva_name, match->cf_name) != 0)
     64 		return 0;
     65 	mva->mva_size = MVSOC_SDHC_SIZE;
     66 	return 1;
     67 }
     68 
     69 static void
     70 mvsoc_sdhc_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct sdhc_softc *sc = device_private(self);
     73 	struct marvell_attach_args *mva = aux;
     74 	bus_space_handle_t ioh;
     75 	int error;
     76 
     77 	sc->sc_dev = self;
     78 	sc->sc_host = malloc(sizeof(*sc->sc_host), M_DEVBUF, M_WAITOK | M_ZERO);
     79 	sc->sc_dmat = mva->mva_dmat;
     80 	/* Must require the DMA.  This sdhc can't 32bit access to SDHC_DATA. */
     81 	sc->sc_flags = SDHC_FLAG_USE_DMA;
     82 	sc->sc_flags |= SDHC_FLAG_EXTDMA_DMAEN;
     83 	sc->sc_flags |= SDHC_FLAG_NO_AUTO_STOP;
     84 	sc->sc_flags |= SDHC_FLAG_NO_BUSY_INTR;
     85 
     86 	aprint_naive("\n");
     87 	aprint_normal(": SDHC controller\n");
     88 
     89 	if (bus_space_subregion(mva->mva_iot, mva->mva_ioh,
     90 				mva->mva_offset, mva->mva_size, &ioh)) {
     91 		aprint_error_dev(self, "can't map registers\n");
     92 		return;
     93 	}
     94 
     95 	intr_establish(mva->mva_irq, IPL_VM, IST_LEVEL, sdhc_intr, sc);
     96 
     97 	bus_space_write_2(mva->mva_iot, ioh, MVSOC_SDHC_C1R,
     98 	    bus_space_read_2(mva->mva_iot, ioh, MVSOC_SDHC_C1R) |
     99 	    SDHC_C1R_CRC16_CHK_EN);
    100 
    101 	error = sdhc_host_found(sc, mva->mva_iot, ioh, MVSOC_SDHC_REG_SIZE);
    102 	if (error != 0) {
    103 		aprint_error_dev(self, "couldn't initialize host, error %d\n",
    104 		    error);
    105 		return;
    106 	}
    107 }
    108