exynos_pinctrl.c revision 1.9.10.1
1 /* $NetBSD: exynos_pinctrl.c,v 1.9.10.1 2017/07/18 19:13:08 snj Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Marty Fouts 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 #include "opt_exynos.h" 33 #include "opt_arm_debug.h" 34 #include "gpio.h" 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(1, "$NetBSD: exynos_pinctrl.c,v 1.9.10.1 2017/07/18 19:13:08 snj Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/bus.h> 41 #include <sys/device.h> 42 #include <sys/intr.h> 43 #include <sys/systm.h> 44 #include <sys/kmem.h> 45 #include <sys/gpio.h> 46 47 #include <dev/gpio/gpiovar.h> 48 49 #include <arm/samsung/exynos_reg.h> 50 #include <arm/samsung/exynos_var.h> 51 #include <arm/samsung/exynos_intr.h> 52 #include <arm/samsung/exynos_pinctrl.h> 53 54 #include <dev/fdt/fdtvar.h> 55 56 struct exynos_pinctrl_config { 57 int pc_phandle; 58 struct exynos_gpio_pin_cfg pc_pincfg; 59 struct exynos_pinctrl_softc *pc_sc; 60 }; 61 62 static int exynos_pinctrl_match(device_t, cfdata_t, void *); 63 static void exynos_pinctrl_attach(device_t, device_t, void *); 64 65 static int exynos_pinctrl_set_cfg(device_t, const void *, size_t); 66 static void exynos_parse_config(int, struct exynos_gpio_pin_cfg *); 67 68 static struct fdtbus_pinctrl_controller_func exynos_pinctrl_controller_func = { 69 .set_config = exynos_pinctrl_set_cfg 70 }; 71 72 CFATTACH_DECL_NEW(exynos_pinctrl, sizeof(struct exynos_pinctrl_softc), 73 exynos_pinctrl_match, exynos_pinctrl_attach, NULL, NULL); 74 75 static int 76 exynos_pinctrl_match(device_t parent, cfdata_t cf, void *aux) 77 { 78 const char * const compatible[] = { "samsung,exynos5420-pinctrl", 79 NULL }; 80 struct fdt_attach_args * const faa = aux; 81 return of_match_compatible(faa->faa_phandle, compatible); 82 } 83 84 static bool 85 is_pinctrl(int phandle) 86 { 87 int len = OF_getproplen(phandle, "samsung,pins"); 88 return len > 0; 89 } 90 91 static void 92 exynos_pinctrl_attach(device_t parent, device_t self, void *aux) 93 { 94 struct exynos_pinctrl_softc * const sc 95 = kmem_zalloc(sizeof(*sc), KM_SLEEP); 96 struct fdt_attach_args * const faa = aux; 97 bus_addr_t addr; 98 bus_size_t size; 99 int error; 100 int child; 101 102 if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) { 103 aprint_error(": couldn't get registers\n"); 104 return; 105 } 106 107 aprint_normal(" pinctl @ 0x%08x ", (uint)addr); 108 sc->sc_dev = self; 109 sc->sc_bst = faa->faa_bst; 110 error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 111 if (error) { 112 aprint_error(": couldn't map %#llx: %d", 113 (uint64_t)addr, error); 114 return; 115 } 116 117 aprint_naive("\n"); 118 aprint_normal("\n"); 119 120 for (child = OF_child(faa->faa_phandle); child; 121 child = OF_peer(child)) { 122 123 if (of_getprop_bool(child, "gpio-controller")) { 124 exynos_gpio_bank_config(sc, faa, child); 125 } 126 127 if (is_pinctrl(child)) { 128 fdtbus_register_pinctrl_config(self, child, 129 &exynos_pinctrl_controller_func); 130 } 131 } 132 133 fdtbus_pinctrl_configure(); 134 } 135 136 static void 137 exynos_parse_config(int phandle, struct exynos_gpio_pin_cfg *gc) 138 { 139 of_getprop_uint32(phandle, "samsung,pin-function", &gc->cfg); 140 of_getprop_uint32(phandle, "samsung,pin-pud", &gc->pud); 141 of_getprop_uint32(phandle, "samsung,pin-drv", &gc->drv); 142 of_getprop_uint32(phandle, "samsung,pin-conpwd", &gc->conpwd); 143 of_getprop_uint32(phandle, "samsung,pin-pudpwd", &gc->pudpwd); 144 } 145 146 static int 147 exynos_do_config(struct exynos_pinctrl_config *pc) 148 { 149 struct exynos_gpio_pin_cfg *gc = &pc->pc_pincfg; 150 struct exynos_gpio_bank *bank; 151 const char *pins; 152 153 int pins_len = OF_getproplen(pc->pc_phandle, "samsung,pins"); 154 if (pins_len <= 0) 155 return -1; 156 157 for (pins = fdtbus_get_string(pc->pc_phandle, "samsung,pins"); 158 pins_len > 0; 159 pins_len -= strlen(pins) + 1, pins += strlen(pins) + 1) { 160 bank = exynos_gpio_bank_lookup(pins); 161 if (bank == NULL) { 162 aprint_error_dev(pc->pc_sc->sc_dev, 163 "unknown pin name '%s'\n", pins); 164 continue; 165 } 166 exynos_gpio_pin_ctl_write(bank, gc); 167 } 168 169 return 0; 170 } 171 172 static int 173 exynos_pinctrl_set_cfg(device_t dev, const void *data, size_t len) 174 { 175 struct exynos_pinctrl_config pc; 176 177 if (len != 4) 178 return -1; 179 180 pc.pc_phandle = fdtbus_get_phandle_from_native(be32dec(data)); 181 pc.pc_sc = device_private(dev); 182 exynos_parse_config(pc.pc_phandle, &pc.pc_pincfg); 183 184 return exynos_do_config(&pc); 185 } 186
Indexes created Sat Oct 25 16:10:12 GMT 2025