imx23_clkctrl.c revision 1.1.10.3
1 1.1.10.2 tls /* $Id: imx23_clkctrl.c,v 1.1.10.3 2017/12/03 11:35:53 jdolecek Exp $ */ 2 1.1.10.2 tls 3 1.1.10.2 tls /* 4 1.1.10.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.1.10.2 tls * All rights reserved. 6 1.1.10.2 tls * 7 1.1.10.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.1.10.2 tls * by Petri Laakso. 9 1.1.10.2 tls * 10 1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 11 1.1.10.2 tls * modification, are permitted provided that the following conditions 12 1.1.10.2 tls * are met: 13 1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.1.10.2 tls * notice, this list of conditions and the following disclaimer. 15 1.1.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.10.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.1.10.2 tls * documentation and/or other materials provided with the distribution. 18 1.1.10.2 tls * 19 1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.10.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.10.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.10.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.10.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.10.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.10.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.10.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.10.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.10.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.10.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.1.10.2 tls */ 31 1.1.10.2 tls 32 1.1.10.2 tls #include <sys/param.h> 33 1.1.10.2 tls #include <sys/types.h> 34 1.1.10.2 tls #include <sys/bus.h> 35 1.1.10.2 tls #include <sys/cdefs.h> 36 1.1.10.2 tls #include <sys/device.h> 37 1.1.10.2 tls #include <sys/errno.h> 38 1.1.10.2 tls 39 1.1.10.2 tls #include <arm/imx/imx23_clkctrlreg.h> 40 1.1.10.2 tls #include <arm/imx/imx23_clkctrlvar.h> 41 1.1.10.2 tls #include <arm/imx/imx23var.h> 42 1.1.10.2 tls 43 1.1.10.2 tls typedef struct clkctrl_softc { 44 1.1.10.2 tls device_t sc_dev; 45 1.1.10.2 tls bus_space_tag_t sc_iot; 46 1.1.10.2 tls bus_space_handle_t sc_hdl; 47 1.1.10.2 tls } *clkctrl_softc_t; 48 1.1.10.2 tls 49 1.1.10.2 tls static int clkctrl_match(device_t, cfdata_t, void *); 50 1.1.10.2 tls static void clkctrl_attach(device_t, device_t, void *); 51 1.1.10.2 tls static int clkctrl_activate(device_t, enum devact); 52 1.1.10.2 tls 53 1.1.10.2 tls static void clkctrl_init(struct clkctrl_softc *); 54 1.1.10.2 tls 55 1.1.10.2 tls static clkctrl_softc_t _sc = NULL; 56 1.1.10.2 tls 57 1.1.10.2 tls CFATTACH_DECL3_NEW(clkctrl, 58 1.1.10.2 tls sizeof(struct clkctrl_softc), 59 1.1.10.2 tls clkctrl_match, 60 1.1.10.2 tls clkctrl_attach, 61 1.1.10.2 tls NULL, 62 1.1.10.2 tls clkctrl_activate, 63 1.1.10.2 tls NULL, 64 1.1.10.2 tls NULL, 65 1.1.10.2 tls 0 66 1.1.10.2 tls ); 67 1.1.10.2 tls 68 1.1.10.2 tls #define CLKCTRL_RD(sc, reg) \ 69 1.1.10.2 tls bus_space_read_4(sc->sc_iot, sc->sc_hdl, (reg)) 70 1.1.10.2 tls #define CLKCTRL_WR(sc, reg, val) \ 71 1.1.10.2 tls bus_space_write_4(sc->sc_iot, sc->sc_hdl, (reg), (val)) 72 1.1.10.2 tls 73 1.1.10.2 tls #define CLKCTRL_SOFT_RST_LOOP 455 /* At least 1 us ... */ 74 1.1.10.2 tls 75 1.1.10.2 tls static int 76 1.1.10.2 tls clkctrl_match(device_t parent, cfdata_t match, void *aux) 77 1.1.10.2 tls { 78 1.1.10.2 tls struct apb_attach_args *aa = aux; 79 1.1.10.2 tls 80 1.1.10.2 tls if ((aa->aa_addr == HW_CLKCTRL_BASE) && 81 1.1.10.2 tls (aa->aa_size == HW_CLKCTRL_SIZE)) 82 1.1.10.2 tls return 1; 83 1.1.10.2 tls 84 1.1.10.2 tls return 0; 85 1.1.10.2 tls } 86 1.1.10.2 tls 87 1.1.10.2 tls static void 88 1.1.10.2 tls clkctrl_attach(device_t parent, device_t self, void *aux) 89 1.1.10.2 tls { 90 1.1.10.2 tls struct clkctrl_softc *sc = device_private(self); 91 1.1.10.2 tls struct apb_attach_args *aa = aux; 92 1.1.10.2 tls static int clkctrl_attached = 0; 93 1.1.10.2 tls 94 1.1.10.2 tls sc->sc_dev = self; 95 1.1.10.2 tls sc->sc_iot = aa->aa_iot; 96 1.1.10.2 tls 97 1.1.10.2 tls if (clkctrl_attached) { 98 1.1.10.2 tls aprint_error_dev(sc->sc_dev, "already attached\n"); 99 1.1.10.2 tls return; 100 1.1.10.2 tls } 101 1.1.10.2 tls 102 1.1.10.2 tls if (bus_space_map(sc->sc_iot, aa->aa_addr, aa->aa_size, 0, 103 1.1.10.2 tls &sc->sc_hdl)) 104 1.1.10.2 tls { 105 1.1.10.2 tls aprint_error_dev(sc->sc_dev, "Unable to map bus space\n"); 106 1.1.10.2 tls return; 107 1.1.10.2 tls } 108 1.1.10.2 tls 109 1.1.10.2 tls 110 1.1.10.2 tls clkctrl_init(sc); 111 1.1.10.2 tls 112 1.1.10.2 tls aprint_normal("\n"); 113 1.1.10.2 tls 114 1.1.10.2 tls clkctrl_attached = 1; 115 1.1.10.2 tls 116 1.1.10.2 tls return; 117 1.1.10.2 tls } 118 1.1.10.2 tls 119 1.1.10.2 tls static int 120 1.1.10.2 tls clkctrl_activate(device_t self, enum devact act) 121 1.1.10.2 tls { 122 1.1.10.2 tls 123 1.1.10.2 tls return EOPNOTSUPP; 124 1.1.10.2 tls } 125 1.1.10.2 tls 126 1.1.10.2 tls static void 127 1.1.10.2 tls clkctrl_init(struct clkctrl_softc *sc) 128 1.1.10.2 tls { 129 1.1.10.2 tls _sc = sc; 130 1.1.10.2 tls return; 131 1.1.10.2 tls } 132 1.1.10.2 tls 133 1.1.10.2 tls /* 134 1.1.10.2 tls * Power up 8-phase PLL outputs for USB PHY 135 1.1.10.2 tls * 136 1.1.10.2 tls */ 137 1.1.10.2 tls void 138 1.1.10.2 tls clkctrl_en_usb(void) 139 1.1.10.2 tls { 140 1.1.10.2 tls struct clkctrl_softc *sc = _sc; 141 1.1.10.2 tls 142 1.1.10.2 tls if (sc == NULL) { 143 1.1.10.2 tls aprint_error("clkctrl is not initalized"); 144 1.1.10.2 tls return; 145 1.1.10.2 tls } 146 1.1.10.2 tls 147 1.1.10.2 tls CLKCTRL_WR(sc, HW_CLKCTRL_PLLCTRL0_SET, 148 1.1.10.2 tls HW_CLKCTRL_PLLCTRL0_EN_USB_CLKS); 149 1.1.10.2 tls 150 1.1.10.2 tls return; 151 1.1.10.2 tls } 152 1.1.10.3 jdolecek 153 1.1.10.3 jdolecek /* 154 1.1.10.3 jdolecek * Enable 24MHz clock for the Digital Filter. 155 1.1.10.3 jdolecek * 156 1.1.10.3 jdolecek */ 157 1.1.10.3 jdolecek void 158 1.1.10.3 jdolecek clkctrl_en_filtclk(void) 159 1.1.10.3 jdolecek { 160 1.1.10.3 jdolecek struct clkctrl_softc *sc = _sc; 161 1.1.10.3 jdolecek 162 1.1.10.3 jdolecek if (sc == NULL) { 163 1.1.10.3 jdolecek aprint_error("clkctrl is not initalized"); 164 1.1.10.3 jdolecek return; 165 1.1.10.3 jdolecek } 166 1.1.10.3 jdolecek 167 1.1.10.3 jdolecek CLKCTRL_WR(sc, HW_CLKCTRL_XTAL_CLR, HW_CLKCTRL_XTAL_FILT_CLK24M_GATE); 168 1.1.10.3 jdolecek 169 1.1.10.3 jdolecek return; 170 1.1.10.3 jdolecek } 171
Indexes created Fri Sep 26 08:10:20 GMT 2025