fdt_dai.c revision 1.1.2.2
1 1.1.2.2 pgoyette /* $NetBSD: fdt_dai.c,v 1.1.2.2 2018/05/21 04:36:05 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /*- 4 1.1.2.2 pgoyette * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca> 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.1.2.2 pgoyette * are met: 10 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.1.2.2 pgoyette * 16 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 pgoyette * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 pgoyette * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 pgoyette * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 pgoyette * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.1.2.2 pgoyette * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.1.2.2 pgoyette * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.1.2.2 pgoyette * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.1.2.2 pgoyette * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 pgoyette * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 pgoyette * SUCH DAMAGE. 27 1.1.2.2 pgoyette */ 28 1.1.2.2 pgoyette 29 1.1.2.2 pgoyette #include <sys/cdefs.h> 30 1.1.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: fdt_dai.c,v 1.1.2.2 2018/05/21 04:36:05 pgoyette Exp $"); 31 1.1.2.2 pgoyette 32 1.1.2.2 pgoyette #include <sys/param.h> 33 1.1.2.2 pgoyette #include <sys/bus.h> 34 1.1.2.2 pgoyette #include <sys/kmem.h> 35 1.1.2.2 pgoyette 36 1.1.2.2 pgoyette #include <libfdt.h> 37 1.1.2.2 pgoyette #include <dev/fdt/fdtvar.h> 38 1.1.2.2 pgoyette 39 1.1.2.2 pgoyette #include <dev/audio_dai.h> 40 1.1.2.2 pgoyette 41 1.1.2.2 pgoyette struct fdtbus_dai_controller { 42 1.1.2.2 pgoyette device_t dc_dev; 43 1.1.2.2 pgoyette int dc_phandle; 44 1.1.2.2 pgoyette const struct fdtbus_dai_controller_func *dc_funcs; 45 1.1.2.2 pgoyette 46 1.1.2.2 pgoyette struct fdtbus_dai_controller *dc_next; 47 1.1.2.2 pgoyette }; 48 1.1.2.2 pgoyette 49 1.1.2.2 pgoyette static struct fdtbus_dai_controller *fdtbus_dc = NULL; 50 1.1.2.2 pgoyette 51 1.1.2.2 pgoyette int 52 1.1.2.2 pgoyette fdtbus_register_dai_controller(device_t dev, int phandle, 53 1.1.2.2 pgoyette const struct fdtbus_dai_controller_func *funcs) 54 1.1.2.2 pgoyette { 55 1.1.2.2 pgoyette struct fdtbus_dai_controller *dc; 56 1.1.2.2 pgoyette 57 1.1.2.2 pgoyette dc = kmem_alloc(sizeof(*dc), KM_SLEEP); 58 1.1.2.2 pgoyette dc->dc_dev = dev; 59 1.1.2.2 pgoyette dc->dc_phandle = phandle; 60 1.1.2.2 pgoyette dc->dc_funcs = funcs; 61 1.1.2.2 pgoyette 62 1.1.2.2 pgoyette dc->dc_next = fdtbus_dc; 63 1.1.2.2 pgoyette fdtbus_dc = dc; 64 1.1.2.2 pgoyette 65 1.1.2.2 pgoyette return 0; 66 1.1.2.2 pgoyette } 67 1.1.2.2 pgoyette 68 1.1.2.2 pgoyette static struct fdtbus_dai_controller * 69 1.1.2.2 pgoyette fdtbus_get_dai_controller(int phandle) 70 1.1.2.2 pgoyette { 71 1.1.2.2 pgoyette struct fdtbus_dai_controller *dc; 72 1.1.2.2 pgoyette 73 1.1.2.2 pgoyette for (dc = fdtbus_dc; dc; dc = dc->dc_next) { 74 1.1.2.2 pgoyette if (dc->dc_phandle == phandle) { 75 1.1.2.2 pgoyette return dc; 76 1.1.2.2 pgoyette } 77 1.1.2.2 pgoyette } 78 1.1.2.2 pgoyette 79 1.1.2.2 pgoyette return NULL; 80 1.1.2.2 pgoyette } 81 1.1.2.2 pgoyette 82 1.1.2.2 pgoyette audio_dai_tag_t 83 1.1.2.2 pgoyette fdtbus_dai_acquire(int phandle, const char *prop) 84 1.1.2.2 pgoyette { 85 1.1.2.2 pgoyette return fdtbus_dai_acquire_index(phandle, prop, 0); 86 1.1.2.2 pgoyette } 87 1.1.2.2 pgoyette 88 1.1.2.2 pgoyette audio_dai_tag_t 89 1.1.2.2 pgoyette fdtbus_dai_acquire_index(int phandle, const char *prop, int index) 90 1.1.2.2 pgoyette { 91 1.1.2.2 pgoyette struct fdtbus_dai_controller *dc; 92 1.1.2.2 pgoyette const uint32_t *dais, *p; 93 1.1.2.2 pgoyette u_int n, dai_cells; 94 1.1.2.2 pgoyette int len, resid; 95 1.1.2.2 pgoyette 96 1.1.2.2 pgoyette dais = fdtbus_get_prop(phandle, prop, &len); 97 1.1.2.2 pgoyette if (dais == NULL) 98 1.1.2.2 pgoyette return NULL; 99 1.1.2.2 pgoyette 100 1.1.2.2 pgoyette p = dais; 101 1.1.2.2 pgoyette for (n = 0, resid = len; resid > 0; n++) { 102 1.1.2.2 pgoyette const int dc_phandle = 103 1.1.2.2 pgoyette fdtbus_get_phandle_from_native(be32toh(p[0])); 104 1.1.2.2 pgoyette if (of_getprop_uint32(dc_phandle, "#sound-dai-cells", &dai_cells)) 105 1.1.2.2 pgoyette dai_cells = 0; 106 1.1.2.2 pgoyette if (n == index) { 107 1.1.2.2 pgoyette dc = fdtbus_get_dai_controller(dc_phandle); 108 1.1.2.2 pgoyette if (dc == NULL) 109 1.1.2.2 pgoyette return NULL; 110 1.1.2.2 pgoyette return dc->dc_funcs->get_tag(dc->dc_dev, 111 1.1.2.2 pgoyette &p[0], (dai_cells + 1) * 4); 112 1.1.2.2 pgoyette } 113 1.1.2.2 pgoyette resid -= (dai_cells + 1) * 4; 114 1.1.2.2 pgoyette p += dai_cells + 1; 115 1.1.2.2 pgoyette } 116 1.1.2.2 pgoyette 117 1.1.2.2 pgoyette return NULL; 118 1.1.2.2 pgoyette } 119
Indexes created Fri Oct 03 02:09:57 GMT 2025