1 /* $NetBSD: plmmc_fdt.c,v 1.1 2017/06/02 11:04:01 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: plmmc_fdt.c,v 1.1 2017/06/02 11:04:01 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/pl181reg.h> 41 #include <dev/ic/pl181var.h> 42 43 static int plmmc_fdt_match(device_t, cfdata_t, void *); 44 static void plmmc_fdt_attach(device_t, device_t, void *); 45 46 static const char * const compatible[] = { 47 "arm,pl180", 48 "arm,pl181", 49 NULL 50 }; 51 52 CFATTACH_DECL_NEW(plmmc_fdt, sizeof(struct plmmc_softc), 53 plmmc_fdt_match, plmmc_fdt_attach, NULL, NULL); 54 55 static int 56 plmmc_fdt_match(device_t parent, cfdata_t cf, void *aux) 57 { 58 struct fdt_attach_args * const faa = aux; 59 60 return of_compatible(faa->faa_phandle, compatible) >= 0; 61 } 62 63 static void 64 plmmc_fdt_attach(device_t parent, device_t self, void *aux) 65 { 66 struct plmmc_softc * const sc = device_private(self); 67 struct fdt_attach_args * const faa = aux; 68 const int phandle = faa->faa_phandle; 69 struct clk *clk; 70 bus_addr_t addr; 71 bus_size_t size; 72 void *ih; 73 74 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 75 aprint_error(": missing 'reg' property\n"); 76 return; 77 } 78 79 clk = fdtbus_clock_get_index(phandle, 0); 80 if (clk == NULL) { 81 aprint_error(": couldn't get clock\n"); 82 return; 83 } 84 85 if (clk_enable(clk) != 0) { 86 aprint_error(": couldn't enable clock\n"); 87 return; 88 } 89 90 sc->sc_dev = self; 91 sc->sc_clock_freq = clk_get_rate(clk); 92 of_getprop_uint32(phandle, "max-frequency", &sc->sc_max_freq); 93 sc->sc_bst = faa->faa_bst; 94 if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) { 95 aprint_error(": couldn't map device\n"); 96 return; 97 } 98 99 aprint_naive("\n"); 100 aprint_normal("\n"); 101 102 ih = fdtbus_intr_establish(phandle, 0, IPL_BIO, 0, plmmc_intr, sc); 103 if (ih == NULL) { 104 aprint_error_dev(self, "couldn't install interrupt handler\n"); 105 return; 106 } 107 108 plmmc_init(sc); 109 } 110