1 /* $OpenBSD: imxgpc.c,v 1.5 2019/04/01 08:40:37 patrick Exp $ */ 2 /* 3 * Copyright (c) 2016 Mark Kettenis 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/systm.h> 20 #include <sys/device.h> 21 #include <sys/malloc.h> 22 23 #if defined(__arm64__) 24 #include <machine/cpufunc.h> 25 #endif 26 #include <machine/fdt.h> 27 28 #include <dev/ofw/openfirm.h> 29 #include <dev/ofw/ofw_power.h> 30 31 #define FSL_SIP_GPC 0xc2000000 32 #define FSL_SIP_CONFIG_GPC_PM_DOMAIN 0x03 33 34 struct imxgpc_softc { 35 struct device sc_dev; 36 struct interrupt_controller sc_ic; 37 38 int sc_npd; 39 struct power_domain_device *sc_pd; 40 }; 41 42 int imxgpc_match(struct device *, void *, void *); 43 void imxgpc_attach(struct device *, struct device *, void *); 44 void imxgpc_enable(void *, uint32_t *, int); 45 46 struct cfattach imxgpc_ca = { 47 sizeof(struct imxgpc_softc), imxgpc_match, imxgpc_attach 48 }; 49 50 struct cfdriver imxgpc_cd = { 51 NULL, "imxgpc", DV_DULL 52 }; 53 54 int 55 imxgpc_match(struct device *parent, void *match, void *aux) 56 { 57 struct fdt_attach_args *faa = aux; 58 59 return (OF_is_compatible(faa->fa_node, "fsl,imx6q-gpc") || 60 OF_is_compatible(faa->fa_node, "fsl,imx7d-gpc") || 61 OF_is_compatible(faa->fa_node, "fsl,imx8mq-gpc")); 62 } 63 64 void 65 imxgpc_attach(struct device *parent, struct device *self, void *aux) 66 { 67 struct fdt_attach_args *faa = aux; 68 struct imxgpc_softc *sc = (struct imxgpc_softc *)self; 69 int i, node, list; 70 71 sc->sc_ic.ic_node = faa->fa_node; 72 sc->sc_ic.ic_cookie = &sc->sc_ic; 73 sc->sc_ic.ic_establish = fdt_intr_parent_establish; 74 sc->sc_ic.ic_disestablish = fdt_intr_parent_disestablish; 75 fdt_intr_register(&sc->sc_ic); 76 77 printf("\n"); 78 79 if (OF_is_compatible(faa->fa_node, "fsl,imx8mq-gpc")) { 80 list = OF_child(faa->fa_node); 81 if (!list) 82 return; 83 for (node = OF_child(list); node; node = OF_peer(node)) 84 sc->sc_npd++; 85 if (!sc->sc_npd) 86 return; 87 sc->sc_pd = mallocarray(sc->sc_npd, sizeof(*sc->sc_pd), 88 M_DEVBUF, M_WAITOK); 89 for (node = OF_child(list), i = 0; node; 90 node = OF_peer(node), i++){ 91 sc->sc_pd[i].pd_node = node; 92 sc->sc_pd[i].pd_cookie = &sc->sc_pd[i]; 93 sc->sc_pd[i].pd_enable = imxgpc_enable; 94 power_domain_register(&sc->sc_pd[i]); 95 } 96 } 97 } 98 99 void 100 imxgpc_enable(void *cookie, uint32_t *cells, int on) 101 { 102 #if defined(__arm64__) 103 struct power_domain_device *pd = cookie; 104 int domain; 105 106 domain = OF_getpropint(pd->pd_node, "reg", 0); 107 108 /* Set up power domain */ 109 smc_call(FSL_SIP_GPC, FSL_SIP_CONFIG_GPC_PM_DOMAIN, 110 domain, on); 111 #endif 112 } 113