sni_gpio.c revision 1.2
1 /* $NetBSD: sni_gpio.c,v 1.2 2020/03/19 20:53:53 nisimura Exp $ */ 2 3 /*- 4 * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Socionext SC2A11 SynQuacer GPIO driver 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: sni_gpio.c,v 1.2 2020/03/19 20:53:53 nisimura Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/device.h> 41 #include <sys/systm.h> 42 #include <sys/gpio.h> 43 #include <sys/kernel.h> 44 #include <sys/systm.h> 45 46 #include <machine/endian.h> 47 #include <sys/bus.h> 48 #include <sys/intr.h> 49 50 #include <dev/gpio/gpiovar.h> 51 #include <dev/fdt/fdtvar.h> 52 #include <dev/acpi/acpireg.h> 53 #include <dev/acpi/acpivar.h> 54 #include <dev/acpi/acpi_intr.h> 55 56 static int snigpio_fdt_match(device_t, struct cfdata *, void *); 57 static void snigpio_fdt_attach(device_t, device_t, void *); 58 static int snigpio_acpi_match(device_t, struct cfdata *, void *); 59 static void snigpio_acpi_attach(device_t, device_t, void *); 60 61 struct snigpio_softc { 62 device_t sc_dev; 63 bus_space_tag_t sc_iot; 64 bus_space_handle_t sc_ioh; 65 bus_addr_t sc_iob; 66 bus_size_t sc_ios; 67 kmutex_t sc_lock; 68 struct gpio_chipset_tag sc_gpio_gc; 69 gpio_pin_t sc_gpio_pins[32]; 70 int sc_maxpins; 71 int sc_phandle; 72 }; 73 74 CFATTACH_DECL_NEW(snigpio_fdt, sizeof(struct snigpio_softc), 75 snigpio_fdt_match, snigpio_fdt_attach, NULL, NULL); 76 77 CFATTACH_DECL_NEW(snigpio_acpi, sizeof(struct snigpio_softc), 78 snigpio_acpi_match, snigpio_acpi_attach, NULL, NULL); 79 80 static void snigpio_attach_i(struct snigpio_softc *); 81 82 static int 83 snigpio_fdt_match(device_t parent, struct cfdata *match, void *aux) 84 { 85 static const char * compatible[] = { 86 "socionext,synquacer-gpio", 87 "fujitsu,mb86s70-gpio", 88 NULL 89 }; 90 struct fdt_attach_args * const faa = aux; 91 92 return of_match_compatible(faa->faa_phandle, compatible); 93 } 94 95 static void 96 snigpio_fdt_attach(device_t parent, device_t self, void *aux) 97 { 98 struct snigpio_softc * const sc = device_private(self); 99 struct fdt_attach_args * const faa = aux; 100 prop_dictionary_t dict = device_properties(self); 101 const int phandle = faa->faa_phandle; 102 bus_space_handle_t ioh; 103 bus_addr_t addr; 104 bus_size_t size; 105 _Bool disable; 106 int error; 107 108 prop_dictionary_get_bool(dict, "disable", &disable); 109 if (disable) { 110 aprint_naive(": disabled\n"); 111 aprint_normal(": disabled\n"); 112 return; 113 } 114 error = fdtbus_get_reg(phandle, 0, &addr, &size); 115 if (error) { 116 aprint_error(": couldn't get registers\n"); 117 return; 118 } 119 error = bus_space_map(faa->faa_bst, addr, size, 0, &ioh); 120 if (error) { 121 aprint_error(": unable to map device\n"); 122 return; 123 } 124 125 sc->sc_dev = self; 126 sc->sc_phandle = phandle; 127 sc->sc_iot = faa->faa_bst; 128 sc->sc_ioh = ioh; 129 sc->sc_iob = addr; 130 sc->sc_ios = size; 131 132 snigpio_attach_i(sc); 133 134 return; 135 } 136 137 static int 138 snigpio_acpi_match(device_t parent, struct cfdata *match, void *aux) 139 { 140 static const char * compatible[] = { 141 "SCX0007", 142 NULL 143 }; 144 struct acpi_attach_args *aa = aux; 145 146 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 147 return 0; 148 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible); 149 } 150 151 static void 152 snigpio_acpi_attach(device_t parent, device_t self, void *aux) 153 { 154 struct snigpio_softc * const sc = device_private(self); 155 struct acpi_attach_args *aa = aux; 156 bus_space_handle_t ioh; 157 struct acpi_resources res; 158 struct acpi_mem *mem; 159 struct acpi_irq *irq; 160 ACPI_STATUS rv; 161 162 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 163 &res, &acpi_resource_parse_ops_default); 164 if (ACPI_FAILURE(rv)) 165 return; 166 167 mem = acpi_res_mem(&res, 0); 168 irq = acpi_res_irq(&res, 0); 169 if (mem == NULL || irq == NULL) { 170 aprint_error(": incomplete resources\n"); 171 return; 172 } 173 if (mem->ar_length == 0) { 174 aprint_error(": zero length memory resource\n"); 175 return; 176 } 177 if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, 178 &ioh)) { 179 aprint_error(": couldn't map registers\n"); 180 return; 181 } 182 183 sc->sc_dev = self; 184 sc->sc_iot = aa->aa_memt; 185 sc->sc_ioh = ioh; 186 sc->sc_ios = mem->ar_length; 187 188 snigpio_attach_i(sc); 189 } 190 191 static void 192 snigpio_attach_i(struct snigpio_softc *sc) 193 { 194 struct gpiobus_attach_args gba; 195 196 aprint_naive(": GPIO controller\n"); 197 aprint_normal(": GPIO controller\n"); 198 199 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 200 sc->sc_maxpins = 32; 201 202 /* create controller tag */ 203 sc->sc_gpio_gc.gp_cookie = sc; 204 sc->sc_gpio_gc.gp_pin_read = NULL; /* AAA */ 205 sc->sc_gpio_gc.gp_pin_write = NULL; /* AAA */ 206 sc->sc_gpio_gc.gp_pin_ctl = NULL; /* AAA */ 207 sc->sc_gpio_gc.gp_intr_establish = NULL; /* AAA */ 208 sc->sc_gpio_gc.gp_intr_disestablish = NULL; /* AAA */ 209 sc->sc_gpio_gc.gp_intr_str = NULL; /* AAA */ 210 211 gba.gba_gc = &sc->sc_gpio_gc; 212 gba.gba_pins = &sc->sc_gpio_pins[0]; 213 gba.gba_npins = sc->sc_maxpins; 214 215 (void) config_found_ia(sc->sc_dev, "gpiobus", &gba, gpiobus_print); 216 } 217
Indexes created Tue Sep 30 06:09:59 GMT 2025