1 /* $NetBSD: imx51_esdhc.c,v 1.1 2012/04/19 09:53:53 bsh 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 2012/04/19 09:53:53 bsh 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