1 /* $NetBSD: netwalker_spi.c,v 1.1 2014/03/29 12:00:27 hkenken Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 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: netwalker_spi.c,v 1.1 2014/03/29 12:00:27 hkenken Exp $"); 31 32 #include "opt_imxspi.h" 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/device.h> 37 38 #include <arm/imx/imx51reg.h> 39 #include <arm/imx/imx51var.h> 40 #include <arm/imx/imx51_ccmvar.h> 41 #include <arm/imx/imx51_ccmreg.h> 42 #include <arm/imx/imx51_iomuxreg.h> 43 #include <arm/imx/imxgpiovar.h> 44 #include <arm/imx/imxspivar.h> 45 46 struct imx51spi_softc { 47 struct imxspi_softc sc_spi; 48 struct spi_chipset_tag sc_tag; 49 }; 50 51 CFATTACH_DECL_NEW(spi_netwalker, sizeof(struct imx51spi_softc), 52 imxspi_match, imxspi_attach, NULL, NULL); 53 54 static int 55 imxspi_cs_enable(void *arg, int slave) 56 { 57 switch (slave) { 58 case 0: 59 gpio_data_write(GPIO_NO(4, 24), 0); 60 gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_OUT); 61 break; 62 case 1: 63 gpio_data_write(GPIO_NO(4, 25), 0); 64 gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_OUT); 65 break; 66 case 2: 67 gpio_data_write(GPIO_NO(3, 0), 0); 68 gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_OUT); 69 break; 70 } 71 72 return 0; 73 } 74 75 static int 76 imxspi_cs_disable(void *arg, int slave) 77 { 78 switch (slave) { 79 case 0: 80 gpio_data_write(GPIO_NO(4, 24), 1); 81 gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN); 82 break; 83 case 1: 84 gpio_data_write(GPIO_NO(4, 25), 1); 85 gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN); 86 break; 87 case 2: 88 gpio_data_write(GPIO_NO(3, 0), 1); 89 gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN); 90 break; 91 } 92 93 return 0; 94 } 95 96 int 97 imxspi_match(device_t parent, cfdata_t cf, void *aux) 98 { 99 if (strcmp(cf->cf_name, "imxspi") == 0) 100 return 1; 101 if (cf->cf_unit != 0) 102 return 1; 103 104 return 0; 105 } 106 107 void 108 imxspi_attach(device_t parent, device_t self, void *aux) 109 { 110 struct imx51spi_softc *sc = device_private(self); 111 struct axi_attach_args *aa = aux; 112 struct imxspi_attach_args saa; 113 int cf_flags = device_cfdata(self)->cf_flags; 114 115 sc->sc_tag.cookie = sc; 116 117 if (device_cfdata(self)->cf_unit == 0) { 118 /* CS 0 GPIO setting */ 119 gpio_data_write(GPIO_NO(4, 24), 1); 120 gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN); 121 122 /* CS 1 GPIO setting */ 123 gpio_data_write(GPIO_NO(4, 25), 1); 124 gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN); 125 126 /* CS 2 */ 127 /* OJ6SH-T25 Shutdown */ 128 gpio_data_write(GPIO_NO(3, 14), 0); 129 gpio_set_direction(GPIO_NO(3, 14), GPIO_DIR_OUT); 130 131 /* CS 2 GPIO setting */ 132 gpio_data_write(GPIO_NO(3, 0), 1); 133 gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN); 134 135 sc->sc_tag.spi_cs_enable = imxspi_cs_enable; 136 sc->sc_tag.spi_cs_disable = imxspi_cs_disable; 137 } 138 139 saa.saa_iot = aa->aa_iot; 140 saa.saa_addr = aa->aa_addr; 141 saa.saa_size = aa->aa_size; 142 saa.saa_irq = aa->aa_irq; 143 saa.saa_enhanced = cf_flags; 144 145 saa.saa_nslaves = IMXSPINSLAVES; 146 saa.saa_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT); 147 saa.saa_tag = &sc->sc_tag; 148 149 sc->sc_spi.sc_dev = self; 150 151 imxspi_attach_common(parent, &sc->sc_spi, &saa); 152 } 153