1 /* $NetBSD: imx51_spi.c,v 1.1 2014/03/22 09:28:08 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 1.1 2014/03/22 09:28:08 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; 47 struct spi_chipset_tag sc_tag; 48 }; 49 50 CFATTACH_DECL_NEW(imx51_spi, sizeof(struct imx51spi_softc), 51 imxspi_match, imxspi_attach, NULL, NULL); 52 53 static int 54 imxspi_cs_enable(void *arg, int slave) 55 { 56 return 0; 57 } 58 59 static int 60 imxspi_cs_disable(void *arg, int slave) 61 { 62 return 0; 63 } 64 65 int 66 imxspi_match(device_t parent, cfdata_t cf, void *aux) 67 { 68 if (strcmp(cf->cf_name, "imxspi") == 0) 69 return 1; 70 71 return 0; 72 } 73 74 void 75 imxspi_attach(device_t parent, device_t self, void *aux) 76 { 77 struct imx51spi_softc *sc = device_private(self); 78 struct axi_attach_args *aa = aux; 79 struct imxspi_attach_args saa; 80 int cf_flags = device_cfdata(self)->cf_flags; 81 82 sc->sc_tag.cookie = sc; 83 sc->sc_tag.spi_cs_enable = imxspi_cs_enable; 84 sc->sc_tag.spi_cs_disable = imxspi_cs_disable; 85 86 saa.saa_iot = aa->aa_iot; 87 saa.saa_addr = aa->aa_addr; 88 saa.saa_size = aa->aa_size; 89 saa.saa_irq = aa->aa_irq; 90 saa.saa_enhanced = cf_flags; 91 92 saa.saa_nslaves = IMXSPINSLAVES; 93 saa.saa_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT); 94 saa.saa_tag = &sc->sc_tag; 95 96 sc->sc_spi.sc_dev = self; 97 98 imxspi_attach_common(parent, &sc->sc_spi, &saa); 99 } 100