/* $NetBSD: imx31_ahb.c,v 1.11 2026/02/02 06:23:37 skrll Exp $ */ /* * Copyright (c) 2002, 2005 Genetec Corporation. All rights reserved. * Written by Hiroyuki Bessho 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Genetec Corporation. * 4. The name of Genetec Corporation may not be used to endorse or * promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``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 GENETEC CORPORATION * 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. * * * Autoconfiguration support for the Intel PXA2[15]0 application * processor. This code is derived from arm/sa11x0/sa11x0.c */ /*- * Copyright (c) 2001, The NetBSD Foundation, Inc. All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by IWAMOTO Toshihiro and Ichiro FUKUHARA. * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /*- * Copyright (c) 1999 * Shin Takemura and PocketBSD Project. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the PocketBSD project * and its contributors. * 4. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: imx31_ahb.c,v 1.11 2026/02/02 06:23:37 skrll Exp $"); #include "locators.h" #include "avic.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/kernel.h> #include <sys/reboot.h> #include <machine/cpu.h> #include <sys/bus.h> #include <arm/cpufunc.h> #include <arm/mainbus/mainbus.h> #include <machine/intr.h> #include <arm/imx/imx31reg.h> #include <arm/imx/imx31var.h> struct ahb_softc { device_t sc_dev; bus_dma_tag_t sc_dmat; bus_space_tag_t sc_memt; bus_space_handle_t sc_memh; }; /* prototypes */ static int ahb_match(device_t, cfdata_t, void *); static void ahb_attach(device_t, device_t, void *); static int ahb_search(device_t, cfdata_t, const int *, void *); static void ahb_attach_critical(struct ahb_softc *); static int ahbbus_print(void *, const char *); /* attach structures */ CFATTACH_DECL_NEW(ahb, sizeof(struct ahb_softc), ahb_match, ahb_attach, NULL, NULL); static struct ahb_softc *ahb_sc; static int ahb_match(device_t parent, cfdata_t match, void *aux) { return 1; } static void ahb_attach(device_t parent, device_t self, void *aux) { struct ahb_softc *sc = device_private(self); struct ahb_attach_args ahba; ahb_sc = sc; sc->sc_dev = self; sc->sc_memt = &imx_bs_tag; #if NBUS_DMA_GENERIC > 0 sc->sc_dmat = &imx_bus_dma_tag; #else sc->sc_dmat = 0; #endif aprint_normal(": AHB-Lite 2.v6 bus interface\n"); /* * Attach critical devices */ ahb_attach_critical(sc); /* * Attach all other devices */ ahba.ahba_name = "ahb"; ahba.ahba_memt = sc->sc_memt; ahba.ahba_dmat = sc->sc_dmat; config_search(self, &ahba, CFARGS(.search = ahb_search)); } static int ahb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) { struct ahb_attach_args * const ahba = aux; ahba->ahba_addr = cf->cf_loc[AHBCF_ADDR]; ahba->ahba_size = cf->cf_loc[AHBCF_SIZE]; ahba->ahba_intr = cf->cf_loc[AHBCF_INTR]; ahba->ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; if (config_probe(parent, cf, ahba)) config_attach(parent, cf, ahba, ahbbus_print, CFARGS_NONE); return 0; } static int ahb_find(device_t parent, cfdata_t cf, const int *ldesc, void *aux) { struct ahb_attach_args * const ahba = aux; struct ahb_attach_args ahba0; if (strcmp(ahba->ahba_name, "ahb")) return 0; if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT && ahba->ahba_addr != cf->cf_loc[AHBCF_ADDR]) return 0; if (ahba->ahba_size != AHBCF_SIZE_DEFAULT && ahba->ahba_size != cf->cf_loc[AHBCF_SIZE]) return 0; if (ahba->ahba_intr != AHBCF_INTR_DEFAULT && ahba->ahba_intr != cf->cf_loc[AHBCF_INTR]) return 0; if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT && ahba->ahba_irqbase != cf->cf_loc[AHBCF_IRQBASE]) return 0; ahba0 = *ahba; ahba0.ahba_addr = cf->cf_loc[AHBCF_ADDR]; ahba0.ahba_size = cf->cf_loc[AHBCF_SIZE]; ahba0.ahba_intr = cf->cf_loc[AHBCF_INTR]; ahba0.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; return config_match(parent, cf, &ahba0); } #if NAVIC == 0 #error no avic present in config file #endif static const struct { const char *name; bus_addr_t addr; bool required; } critical_devs[] = { { .name = "avic", .addr = INTC_BASE, .required = true }, { .name = "gpio1", .addr = GPIO1_BASE, .required = false }, { .name = "gpio2", .addr = GPIO2_BASE, .required = false }, { .name = "gpio3", .addr = GPIO3_BASE, .required = false }, #if 0 { .name = "dmac", .addr = DMAC_BASE, .required = true }, #endif }; static void ahb_attach_critical(struct ahb_softc *sc) { struct ahb_attach_args ahba; cfdata_t cf; size_t i; for (i = 0; i < __arraycount(critical_devs); i++) { ahba.ahba_name = "ahb"; ahba.ahba_memt = sc->sc_memt; ahba.ahba_dmat = sc->sc_dmat; ahba.ahba_addr = critical_devs[i].addr; ahba.ahba_size = AHBCF_SIZE_DEFAULT; ahba.ahba_intr = AHBCF_INTR_DEFAULT; ahba.ahba_irqbase = AHBCF_IRQBASE_DEFAULT; cf = config_search(sc->sc_dev, &ahba, CFARGS(.submatch = ahb_find)); if (cf == NULL && critical_devs[i].required) panic("ahb_attach_critical: failed to find %s!", critical_devs[i].name); ahba.ahba_addr = cf->cf_loc[AHBCF_ADDR]; ahba.ahba_size = cf->cf_loc[AHBCF_SIZE]; ahba.ahba_intr = cf->cf_loc[AHBCF_INTR]; ahba.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE]; config_attach(sc->sc_dev, cf, &ahba, ahbbus_print, CFARGS_NONE); } } static int ahbbus_print(void *aux, const char *name) { struct ahb_attach_args *ahba = aux; if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT) { aprint_normal(" addr 0x%lx", ahba->ahba_addr); if (ahba->ahba_size > AHBCF_SIZE_DEFAULT) aprint_normal("-0x%lx", ahba->ahba_addr + ahba->ahba_size-1); } if (ahba->ahba_intr != AHBCF_INTR_DEFAULT) aprint_normal(" intr %d", ahba->ahba_intr); if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT) aprint_normal(" irqbase %d", ahba->ahba_irqbase); return (UNCONF); } static inline uint32_t read_clock_counter_xsc1(void) { uint32_t x; __asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (x) ); return x; } static inline uint32_t read_clock_counter_xsc2(void) { uint32_t x; __asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (x) ); return x; }
