1 /* $NetBSD: aaci_fdt.c,v 1.1 2017/06/08 10:03:59 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: aaci_fdt.c,v 1.1 2017/06/08 10:03:59 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 38 #include <dev/fdt/fdtvar.h> 39 40 #include <dev/ic/pl041var.h> 41 42 static int aaci_fdt_match(device_t, cfdata_t, void *); 43 static void aaci_fdt_attach(device_t, device_t, void *); 44 45 static const char * const compatible[] = { 46 "arm,pl041", 47 NULL 48 }; 49 50 CFATTACH_DECL_NEW(aaci_fdt, sizeof(struct aaci_softc), 51 aaci_fdt_match, aaci_fdt_attach, NULL, NULL); 52 53 static int 54 aaci_fdt_match(device_t parent, cfdata_t cf, void *aux) 55 { 56 struct fdt_attach_args * const faa = aux; 57 58 return of_compatible(faa->faa_phandle, compatible) >= 0; 59 } 60 61 static void 62 aaci_fdt_attach(device_t parent, device_t self, void *aux) 63 { 64 struct aaci_softc * const sc = device_private(self); 65 struct fdt_attach_args * const faa = aux; 66 const int phandle = faa->faa_phandle; 67 char intrstr[128]; 68 struct clk *clk; 69 bus_addr_t addr; 70 bus_size_t size; 71 void *ih; 72 73 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 74 aprint_error(": missing 'reg' property\n"); 75 return; 76 } 77 78 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 79 aprint_error_dev(self, "failed to decode interrupt\n"); 80 return; 81 } 82 83 for (int i = 0; (clk = fdtbus_clock_get_index(phandle, i)); i++) 84 if (clk_enable(clk) != 0) { 85 aprint_error(": couldn't enable clock #%d\n", i); 86 return; 87 } 88 89 sc->sc_dev = self; 90 sc->sc_bst = faa->faa_bst; 91 if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) { 92 aprint_error(": couldn't map device\n"); 93 return; 94 } 95 96 ih = fdtbus_intr_establish(phandle, 0, IPL_AUDIO, FDT_INTR_MPSAFE, 97 aaci_intr, sc); 98 if (ih == NULL) { 99 aprint_error_dev(self, "couldn't install interrupt handler\n"); 100 return; 101 } 102 103 aaci_attach(sc); 104 105 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 106 } 107