1 /* $NetBSD: fdt_mmc_pwrseq.c,v 1.1 2017/10/22 13:56:49 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: fdt_mmc_pwrseq.c,v 1.1 2017/10/22 13:56:49 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/kmem.h> 35 36 #include <libfdt.h> 37 #include <dev/fdt/fdtvar.h> 38 39 struct fdtbus_mmc_pwrseq { 40 device_t mps_dev; 41 int mps_phandle; 42 const struct fdtbus_mmc_pwrseq_func *mps_funcs; 43 44 struct fdtbus_mmc_pwrseq *mps_next; 45 }; 46 47 static struct fdtbus_mmc_pwrseq *fdtbus_mps = NULL; 48 49 int 50 fdtbus_register_mmc_pwrseq(device_t dev, int phandle, 51 const struct fdtbus_mmc_pwrseq_func *funcs) 52 { 53 struct fdtbus_mmc_pwrseq *mps; 54 55 mps = kmem_alloc(sizeof(*mps), KM_SLEEP); 56 mps->mps_dev = dev; 57 mps->mps_phandle = phandle; 58 mps->mps_funcs = funcs; 59 60 mps->mps_next = fdtbus_mps; 61 fdtbus_mps = mps; 62 63 return 0; 64 } 65 66 static struct fdtbus_mmc_pwrseq * 67 fdtbus_get_mmc_pwrseq(int phandle) 68 { 69 struct fdtbus_mmc_pwrseq *mps; 70 71 for (mps = fdtbus_mps; mps; mps = mps->mps_next) { 72 if (mps->mps_phandle == phandle) { 73 return mps; 74 } 75 } 76 77 return NULL; 78 } 79 80 struct fdtbus_mmc_pwrseq * 81 fdtbus_mmc_pwrseq_get(int phandle) 82 { 83 const u_int *p; 84 int mps_phandle; 85 86 p = fdtbus_get_prop(phandle, "mmc-pwrseq", NULL); 87 if (p == NULL) 88 return NULL; 89 90 mps_phandle = fdtbus_get_phandle_from_native(be32toh(p[0])); 91 return fdtbus_get_mmc_pwrseq(mps_phandle); 92 } 93 94 void 95 fdtbus_mmc_pwrseq_pre_power_on(struct fdtbus_mmc_pwrseq *mps) 96 { 97 if (mps->mps_funcs->pre_power_on) 98 mps->mps_funcs->pre_power_on(mps->mps_dev); 99 } 100 101 void 102 fdtbus_mmc_pwrseq_post_power_on(struct fdtbus_mmc_pwrseq *mps) 103 { 104 if (mps->mps_funcs->post_power_on) 105 mps->mps_funcs->post_power_on(mps->mps_dev); 106 } 107 108 void 109 fdtbus_mmc_pwrseq_power_off(struct fdtbus_mmc_pwrseq *mps) 110 { 111 if (mps->mps_funcs->power_off) 112 mps->mps_funcs->power_off(mps->mps_dev); 113 } 114 115 void 116 fdtbus_mmc_pwrseq_reset(struct fdtbus_mmc_pwrseq *mps) 117 { 118 if (mps->mps_funcs->reset) 119 mps->mps_funcs->reset(mps->mps_dev); 120 } 121