/* $NetBSD: pinctrl_single.c,v 1.1.2.2 2019/11/27 13:46:45 martin Exp $ */ /*- * Copyright (c) 2019 Jared McNeill * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: pinctrl_single.c,v 1.1.2.2 2019/11/27 13:46:45 martin Exp $"); #include #include #include #include #include #include #define PINCTRL_FLAG_PINCONF __BIT(0) /* supports generic pinconf */ struct pinctrl_single_config { uint32_t flags; }; static const struct pinctrl_single_config pinctrl_config = { }; static const struct pinctrl_single_config pinconf_config = { .flags = PINCTRL_FLAG_PINCONF }; static const struct of_compat_data compat_data[] = { { "pinctrl-single", (uintptr_t)&pinctrl_config }, { "pinconf-single", (uintptr_t)&pinconf_config }, { NULL } }; struct pinctrl_single_softc { device_t sc_dev; int sc_phandle; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; uint32_t sc_flags; u_int sc_regwidth; u_int sc_funcmask; }; static void pinctrl_single_pins_write(struct pinctrl_single_softc *sc, u_int off, u_int val) { union { uint32_t reg32; uint16_t reg16; uint8_t reg8; } u; aprint_debug_dev(sc->sc_dev, "writing %#x with %#x\n", off, val); switch (sc->sc_regwidth) { case 8: u.reg8 = bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); u.reg8 &= ~sc->sc_funcmask; u.reg8 |= val; bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, u.reg8); break; case 16: u.reg16 = bus_space_read_2(sc->sc_bst, sc->sc_bsh, off); u.reg16 &= ~sc->sc_funcmask; u.reg16 |= val; bus_space_write_2(sc->sc_bst, sc->sc_bsh, off, u.reg16); break; case 32: u.reg32 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off); u.reg32 &= ~sc->sc_funcmask; u.reg32 |= val; bus_space_write_4(sc->sc_bst, sc->sc_bsh, off, u.reg32); break; default: device_printf(sc->sc_dev, "%s: unsupported reg width %d\n", __func__, sc->sc_regwidth); break; } } static int pinctrl_single_pins_set_config(device_t dev, const void *data, size_t len) { struct pinctrl_single_softc * const sc = device_private(dev); const u_int *pins; int pinslen; if (len != 4) return -1; const int phandle = fdtbus_get_phandle_from_native(be32dec(data)); pins = fdtbus_get_prop(phandle, "pinctrl-single,pins", &pinslen); if (pins == NULL) return -1; while (pinslen >= 8) { const int off = be32toh(pins[0]); const int val = be32toh(pins[1]); pinctrl_single_pins_write(sc, off, val); pins += 2; pinslen -= 8; } return 0; } static struct fdtbus_pinctrl_controller_func pinctrl_single_pins_funcs = { .set_config = pinctrl_single_pins_set_config, }; static int pinctrl_single_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compat_data(faa->faa_phandle, compat_data); } static void pinctrl_single_attach(device_t parent, device_t self, void *aux) { struct pinctrl_single_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; const struct pinctrl_single_config *conf; bus_addr_t addr; bus_size_t size; int child; if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get registers\n"); return; } conf = (const void *)of_search_compatible(phandle, compat_data)->data; sc->sc_dev = self; sc->sc_phandle = phandle; sc->sc_bst = faa->faa_bst; if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { aprint_error(": couldn't map registers\n"); return; } sc->sc_flags = conf->flags; if (of_getprop_uint32(phandle, "pinctrl-single,register-width", &sc->sc_regwidth) != 0) { aprint_error(": missing 'pinctrl-single,register-width' property\n"); return; } if (of_getprop_uint32(phandle, "pinctrl-single,function-mask", &sc->sc_funcmask) != 0) { aprint_error(": missing 'pinctrl-single,function-mask' property\n"); return; } switch (sc->sc_regwidth) { case 8: case 16: case 32: break; default: aprint_error(": register width %d not supported\n", sc->sc_regwidth); return; } aprint_naive("\n"); aprint_normal("\n"); for (child = OF_child(phandle); child; child = OF_peer(child)) { if (of_hasprop(child, "pinctrl-single,pins")) fdtbus_register_pinctrl_config(self, child, &pinctrl_single_pins_funcs); } fdtbus_pinctrl_set_config(phandle, "default"); } CFATTACH_DECL_NEW(pinctrl_single, sizeof(struct pinctrl_single_softc), pinctrl_single_match, pinctrl_single_attach, NULL, NULL);