dwiic_fdt.c revision 1.1.2.2
1 1.1.2.2 pgoyette /* $NetBSD: dwiic_fdt.c,v 1.1.2.2 2018/09/30 01:45:49 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /*- 4 1.1.2.2 pgoyette * Copyright (c) 2017 The NetBSD Foundation, Inc. 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 pgoyette * by Manuel Bouyer. 9 1.1.2.2 pgoyette * 10 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.1.2.2 pgoyette * are met: 13 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.1.2.2 pgoyette * 19 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 pgoyette */ 31 1.1.2.2 pgoyette /* 32 1.1.2.2 pgoyette * Synopsys DesignWare I2C controller, FDT front-end 33 1.1.2.2 pgoyette */ 34 1.1.2.2 pgoyette 35 1.1.2.2 pgoyette #include <sys/cdefs.h> 36 1.1.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: dwiic_fdt.c,v 1.1.2.2 2018/09/30 01:45:49 pgoyette Exp $"); 37 1.1.2.2 pgoyette 38 1.1.2.2 pgoyette #include <sys/param.h> 39 1.1.2.2 pgoyette #include <sys/systm.h> 40 1.1.2.2 pgoyette 41 1.1.2.2 pgoyette #include <dev/fdt/fdtvar.h> 42 1.1.2.2 pgoyette #include <dev/ic/dwiic_var.h> 43 1.1.2.2 pgoyette 44 1.1.2.2 pgoyette static const char * const compatible[] = { 45 1.1.2.2 pgoyette "snps,designware-i2c", 46 1.1.2.2 pgoyette NULL 47 1.1.2.2 pgoyette }; 48 1.1.2.2 pgoyette 49 1.1.2.2 pgoyette struct dwiic_fdt_softc { 50 1.1.2.2 pgoyette struct dwiic_softc sc_dwiic; 51 1.1.2.2 pgoyette }; 52 1.1.2.2 pgoyette 53 1.1.2.2 pgoyette static int dwiic_fdt_match(device_t, cfdata_t, void *); 54 1.1.2.2 pgoyette static void dwiic_fdt_attach(device_t, device_t, void *); 55 1.1.2.2 pgoyette static i2c_tag_t dwiic_fdt_i2c_get_tag(device_t); 56 1.1.2.2 pgoyette 57 1.1.2.2 pgoyette struct fdtbus_i2c_controller_func dwiic_fdt_i2c_funcs = { 58 1.1.2.2 pgoyette .get_tag = dwiic_fdt_i2c_get_tag, 59 1.1.2.2 pgoyette }; 60 1.1.2.2 pgoyette 61 1.1.2.2 pgoyette CFATTACH_DECL_NEW(dwiic_fdt, sizeof(struct dwiic_fdt_softc), 62 1.1.2.2 pgoyette dwiic_fdt_match, dwiic_fdt_attach, dwiic_detach, NULL); 63 1.1.2.2 pgoyette 64 1.1.2.2 pgoyette int 65 1.1.2.2 pgoyette dwiic_fdt_match(device_t parent, cfdata_t match, void *aux) 66 1.1.2.2 pgoyette { 67 1.1.2.2 pgoyette struct fdt_attach_args * const faa = aux; 68 1.1.2.2 pgoyette 69 1.1.2.2 pgoyette return of_match_compatible(faa->faa_phandle, compatible); 70 1.1.2.2 pgoyette } 71 1.1.2.2 pgoyette 72 1.1.2.2 pgoyette void 73 1.1.2.2 pgoyette dwiic_fdt_attach(device_t parent, device_t self, void *aux) 74 1.1.2.2 pgoyette { 75 1.1.2.2 pgoyette struct dwiic_fdt_softc * const sc = device_private(self); 76 1.1.2.2 pgoyette struct fdt_attach_args * const faa = aux; 77 1.1.2.2 pgoyette const int phandle = faa->faa_phandle; 78 1.1.2.2 pgoyette bus_addr_t addr; 79 1.1.2.2 pgoyette bus_size_t size; 80 1.1.2.2 pgoyette char intrstr[128]; 81 1.1.2.2 pgoyette 82 1.1.2.2 pgoyette sc->sc_dwiic.sc_dev = self; 83 1.1.2.2 pgoyette sc->sc_dwiic.sc_power = NULL; 84 1.1.2.2 pgoyette sc->sc_dwiic.sc_type = dwiic_type_generic; 85 1.1.2.2 pgoyette 86 1.1.2.2 pgoyette if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 87 1.1.2.2 pgoyette aprint_error(": couldn't get registers\n"); 88 1.1.2.2 pgoyette return; 89 1.1.2.2 pgoyette } 90 1.1.2.2 pgoyette 91 1.1.2.2 pgoyette sc->sc_dwiic.sc_iot = faa->faa_bst; 92 1.1.2.2 pgoyette if (bus_space_map(sc->sc_dwiic.sc_iot, addr, size, 0, &sc->sc_dwiic.sc_ioh) != 0) { 93 1.1.2.2 pgoyette aprint_error(": couldn't map registers\n"); 94 1.1.2.2 pgoyette return; 95 1.1.2.2 pgoyette } 96 1.1.2.2 pgoyette 97 1.1.2.2 pgoyette aprint_naive(": I2C controller\n"); 98 1.1.2.2 pgoyette aprint_normal(": I2C controller\n"); 99 1.1.2.2 pgoyette 100 1.1.2.2 pgoyette if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 101 1.1.2.2 pgoyette aprint_error_dev(self, "failed to decode interrupt\n"); 102 1.1.2.2 pgoyette return; 103 1.1.2.2 pgoyette } 104 1.1.2.2 pgoyette aprint_normal_dev(self, "interrupting on %s\n", intrstr); 105 1.1.2.2 pgoyette 106 1.1.2.2 pgoyette sc->sc_dwiic.sc_ih = fdtbus_intr_establish(phandle, 0, IPL_VM, 0, 107 1.1.2.2 pgoyette dwiic_intr, &sc->sc_dwiic); 108 1.1.2.2 pgoyette if (sc->sc_dwiic.sc_ih == NULL) { 109 1.1.2.2 pgoyette aprint_error_dev(self, "couldn't establish interrupt\n"); 110 1.1.2.2 pgoyette goto out; 111 1.1.2.2 pgoyette } 112 1.1.2.2 pgoyette 113 1.1.2.2 pgoyette dwiic_attach(&sc->sc_dwiic); 114 1.1.2.2 pgoyette 115 1.1.2.2 pgoyette pmf_device_register(self, dwiic_suspend, dwiic_resume); 116 1.1.2.2 pgoyette 117 1.1.2.2 pgoyette fdtbus_register_i2c_controller(self, phandle, &dwiic_fdt_i2c_funcs); 118 1.1.2.2 pgoyette 119 1.1.2.2 pgoyette fdtbus_attach_i2cbus(self, phandle, &sc->sc_dwiic.sc_i2c_tag, iicbus_print); 120 1.1.2.2 pgoyette 121 1.1.2.2 pgoyette out: 122 1.1.2.2 pgoyette return; 123 1.1.2.2 pgoyette } 124 1.1.2.2 pgoyette 125 1.1.2.2 pgoyette static i2c_tag_t 126 1.1.2.2 pgoyette dwiic_fdt_i2c_get_tag(device_t dev) 127 1.1.2.2 pgoyette { 128 1.1.2.2 pgoyette struct dwiic_fdt_softc * const sc = device_private(dev); 129 1.1.2.2 pgoyette 130 1.1.2.2 pgoyette return &sc->sc_dwiic.sc_i2c_tag; 131 1.1.2.2 pgoyette } 132
Indexes created Wed Oct 15 16:09:53 GMT 2025