/* $NetBSD: imx6_gpc.c,v 1.3.18.1 2023/05/28 10:14:35 martin Exp $ */ /*- * Copyright (c) 2019 Genetec Corporation. All rights reserved. * Written by Hashimoto Kenichi for Genetec Corporation. * * 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: imx6_gpc.c,v 1.3.18.1 2023/05/28 10:14:35 martin Exp $"); #include "opt_fdt.h" #include #include #include #include #include #include struct imxgpc_softc { device_t sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; }; static int imxgpc_match(device_t, struct cfdata *, void *); static void imxgpc_attach(device_t, device_t, void *); static void *imxgpc_establish(device_t, u_int *, int, int, int (*)(void *), void *, const char *); static void imxgpc_disestablish(device_t, void *); static bool imxgpc_intrstr(device_t, u_int *, char *, size_t); struct fdtbus_interrupt_controller_func imxgpc_funcs = { .establish = imxgpc_establish, .disestablish = imxgpc_disestablish, .intrstr = imxgpc_intrstr }; CFATTACH_DECL_NEW(imxgpc, sizeof(struct imxgpc_softc), imxgpc_match, imxgpc_attach, NULL, NULL); static const struct device_compatible_entry compat_data[] = { { .compat = "fsl,imx6q-gpc" }, { .compat = "fsl,imx6sx-gpc" }, DEVICE_COMPAT_EOL }; static int imxgpc_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_compatible_match(faa->faa_phandle, compat_data); } static void imxgpc_attach(device_t parent, device_t self, void *aux) { struct imxgpc_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; bus_addr_t gpc_addr; bus_size_t gpc_size; int error; if (fdtbus_get_reg(phandle, 0, &gpc_addr, &gpc_size) != 0) { aprint_error(": couldn't get gpc registers\n"); return; } sc->sc_dev = self; sc->sc_iot = faa->faa_bst; error = bus_space_map(sc->sc_iot, gpc_addr, gpc_size, 0, &sc->sc_ioh); if (error) { aprint_error(": couldn't map gpc registers: %d\n", error); return; } error = fdtbus_register_interrupt_controller(self, faa->faa_phandle, &imxgpc_funcs); if (error) { aprint_error(": couldn't register with fdtbus: %d\n", error); return; } aprint_naive("\n"); aprint_normal(": General Power Controller\n"); return; } static void * imxgpc_establish(device_t dev, u_int *specifier, int ipl, int flags, int (*func)(void *), void *arg, const char *xname) { /* 1st cell is the interrupt type; 0 is SPI, 1 is PPI */ /* 2nd cell is the interrupt number */ /* 3rd cell is flags */ const u_int type = be32toh(specifier[0]); const u_int intr = be32toh(specifier[1]); const u_int irq = type == 0 ? IRQ_SPI(intr) : IRQ_PPI(intr); const u_int trig = be32toh(specifier[2]) & 0xf; const u_int level = (trig & 0x3) ? IST_EDGE : IST_LEVEL; const u_int mpsafe = (flags & FDT_INTR_MPSAFE) ? IST_MPSAFE : 0; aprint_debug_dev(dev, "intr establish irq %d, level %d\n", irq, level); return intr_establish_xname(irq, ipl, level | mpsafe, func, arg, xname); } static void imxgpc_disestablish(device_t dev, void *ih) { intr_disestablish(ih); } static bool imxgpc_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen) { /* 1st cell is the interrupt type; 0 is SPI, 1 is PPI */ /* 2nd cell is the interrupt number */ /* 3rd cell is flags */ if (!specifier) return false; const u_int type = be32toh(specifier[0]); const u_int intr = be32toh(specifier[1]); const u_int irq = type == 0 ? IRQ_SPI(intr) : IRQ_PPI(intr); snprintf(buf, buflen, "irq %d", irq); return true; }