netwalker_spi.c revision 1.1.10.2
1 1.1.10.2 tls /* $NetBSD: netwalker_spi.c,v 1.1.10.2 2014/08/20 00:02:55 tls Exp $ */ 2 1.1.10.2 tls 3 1.1.10.2 tls /*- 4 1.1.10.2 tls * Copyright (c) 2009 Genetec Corporation. All rights reserved. 5 1.1.10.2 tls * Written by Hashimoto Kenichi for Genetec Corporation. 6 1.1.10.2 tls * 7 1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 8 1.1.10.2 tls * modification, are permitted provided that the following conditions 9 1.1.10.2 tls * are met: 10 1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 11 1.1.10.2 tls * notice, this list of conditions and the following disclaimer. 12 1.1.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.10.2 tls * notice, this list of conditions and the following disclaimer in the 14 1.1.10.2 tls * documentation and/or other materials provided with the distribution. 15 1.1.10.2 tls * 16 1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 1.1.10.2 tls * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.10.2 tls * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.10.2 tls * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 1.1.10.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.10.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.10.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.10.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.10.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.10.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.10.2 tls * SUCH DAMAGE. 27 1.1.10.2 tls */ 28 1.1.10.2 tls 29 1.1.10.2 tls #include <sys/cdefs.h> 30 1.1.10.2 tls __KERNEL_RCSID(0, "$NetBSD: netwalker_spi.c,v 1.1.10.2 2014/08/20 00:02:55 tls Exp $"); 31 1.1.10.2 tls 32 1.1.10.2 tls #include "opt_imxspi.h" 33 1.1.10.2 tls 34 1.1.10.2 tls #include <sys/param.h> 35 1.1.10.2 tls #include <sys/bus.h> 36 1.1.10.2 tls #include <sys/device.h> 37 1.1.10.2 tls 38 1.1.10.2 tls #include <arm/imx/imx51reg.h> 39 1.1.10.2 tls #include <arm/imx/imx51var.h> 40 1.1.10.2 tls #include <arm/imx/imx51_ccmvar.h> 41 1.1.10.2 tls #include <arm/imx/imx51_ccmreg.h> 42 1.1.10.2 tls #include <arm/imx/imx51_iomuxreg.h> 43 1.1.10.2 tls #include <arm/imx/imxgpiovar.h> 44 1.1.10.2 tls #include <arm/imx/imxspivar.h> 45 1.1.10.2 tls 46 1.1.10.2 tls struct imx51spi_softc { 47 1.1.10.2 tls struct imxspi_softc sc_spi; 48 1.1.10.2 tls struct spi_chipset_tag sc_tag; 49 1.1.10.2 tls }; 50 1.1.10.2 tls 51 1.1.10.2 tls CFATTACH_DECL_NEW(spi_netwalker, sizeof(struct imx51spi_softc), 52 1.1.10.2 tls imxspi_match, imxspi_attach, NULL, NULL); 53 1.1.10.2 tls 54 1.1.10.2 tls static int 55 1.1.10.2 tls imxspi_cs_enable(void *arg, int slave) 56 1.1.10.2 tls { 57 1.1.10.2 tls switch (slave) { 58 1.1.10.2 tls case 0: 59 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 24), 0); 60 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_OUT); 61 1.1.10.2 tls break; 62 1.1.10.2 tls case 1: 63 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 25), 0); 64 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_OUT); 65 1.1.10.2 tls break; 66 1.1.10.2 tls case 2: 67 1.1.10.2 tls gpio_data_write(GPIO_NO(3, 0), 0); 68 1.1.10.2 tls gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_OUT); 69 1.1.10.2 tls break; 70 1.1.10.2 tls } 71 1.1.10.2 tls 72 1.1.10.2 tls return 0; 73 1.1.10.2 tls } 74 1.1.10.2 tls 75 1.1.10.2 tls static int 76 1.1.10.2 tls imxspi_cs_disable(void *arg, int slave) 77 1.1.10.2 tls { 78 1.1.10.2 tls switch (slave) { 79 1.1.10.2 tls case 0: 80 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 24), 1); 81 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN); 82 1.1.10.2 tls break; 83 1.1.10.2 tls case 1: 84 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 25), 1); 85 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN); 86 1.1.10.2 tls break; 87 1.1.10.2 tls case 2: 88 1.1.10.2 tls gpio_data_write(GPIO_NO(3, 0), 1); 89 1.1.10.2 tls gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN); 90 1.1.10.2 tls break; 91 1.1.10.2 tls } 92 1.1.10.2 tls 93 1.1.10.2 tls return 0; 94 1.1.10.2 tls } 95 1.1.10.2 tls 96 1.1.10.2 tls int 97 1.1.10.2 tls imxspi_match(device_t parent, cfdata_t cf, void *aux) 98 1.1.10.2 tls { 99 1.1.10.2 tls if (strcmp(cf->cf_name, "imxspi") == 0) 100 1.1.10.2 tls return 1; 101 1.1.10.2 tls if (cf->cf_unit != 0) 102 1.1.10.2 tls return 1; 103 1.1.10.2 tls 104 1.1.10.2 tls return 0; 105 1.1.10.2 tls } 106 1.1.10.2 tls 107 1.1.10.2 tls void 108 1.1.10.2 tls imxspi_attach(device_t parent, device_t self, void *aux) 109 1.1.10.2 tls { 110 1.1.10.2 tls struct imx51spi_softc *sc = device_private(self); 111 1.1.10.2 tls struct axi_attach_args *aa = aux; 112 1.1.10.2 tls struct imxspi_attach_args saa; 113 1.1.10.2 tls int cf_flags = device_cfdata(self)->cf_flags; 114 1.1.10.2 tls 115 1.1.10.2 tls sc->sc_tag.cookie = sc; 116 1.1.10.2 tls 117 1.1.10.2 tls if (device_cfdata(self)->cf_unit == 0) { 118 1.1.10.2 tls /* CS 0 GPIO setting */ 119 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 24), 1); 120 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN); 121 1.1.10.2 tls 122 1.1.10.2 tls /* CS 1 GPIO setting */ 123 1.1.10.2 tls gpio_data_write(GPIO_NO(4, 25), 1); 124 1.1.10.2 tls gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN); 125 1.1.10.2 tls 126 1.1.10.2 tls /* CS 2 */ 127 1.1.10.2 tls /* OJ6SH-T25 Shutdown */ 128 1.1.10.2 tls gpio_data_write(GPIO_NO(3, 14), 0); 129 1.1.10.2 tls gpio_set_direction(GPIO_NO(3, 14), GPIO_DIR_OUT); 130 1.1.10.2 tls 131 1.1.10.2 tls /* CS 2 GPIO setting */ 132 1.1.10.2 tls gpio_data_write(GPIO_NO(3, 0), 1); 133 1.1.10.2 tls gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN); 134 1.1.10.2 tls 135 1.1.10.2 tls sc->sc_tag.spi_cs_enable = imxspi_cs_enable; 136 1.1.10.2 tls sc->sc_tag.spi_cs_disable = imxspi_cs_disable; 137 1.1.10.2 tls } 138 1.1.10.2 tls 139 1.1.10.2 tls saa.saa_iot = aa->aa_iot; 140 1.1.10.2 tls saa.saa_addr = aa->aa_addr; 141 1.1.10.2 tls saa.saa_size = aa->aa_size; 142 1.1.10.2 tls saa.saa_irq = aa->aa_irq; 143 1.1.10.2 tls saa.saa_enhanced = cf_flags; 144 1.1.10.2 tls 145 1.1.10.2 tls saa.saa_nslaves = IMXSPINSLAVES; 146 1.1.10.2 tls saa.saa_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT); 147 1.1.10.2 tls saa.saa_tag = &sc->sc_tag; 148 1.1.10.2 tls 149 1.1.10.2 tls sc->sc_spi.sc_dev = self; 150 1.1.10.2 tls 151 1.1.10.2 tls imxspi_attach_common(parent, &sc->sc_spi, &saa); 152 1.1.10.2 tls } 153
Indexes created Wed Oct 01 19:09:53 GMT 2025