gt.c revision 1.12
1 /* $NetBSD: gt.c,v 1.12 2004/08/30 15:05:16 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Soren S. Jorvang. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: gt.c,v 1.12 2004/08/30 15:05:16 drochner Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/ioctl.h> 34 #include <sys/select.h> 35 #include <sys/tty.h> 36 #include <sys/proc.h> 37 #include <sys/user.h> 38 #include <sys/conf.h> 39 #include <sys/file.h> 40 #include <sys/uio.h> 41 #include <sys/kernel.h> 42 #include <sys/syslog.h> 43 #include <sys/types.h> 44 #include <sys/device.h> 45 46 #include <machine/autoconf.h> 47 #include <machine/bus.h> 48 #include <machine/intr.h> 49 50 #include <dev/pci/pcivar.h> 51 52 #include <cobalt/cobalt/clockvar.h> 53 #include <cobalt/dev/gtreg.h> 54 55 #include "pci.h" 56 57 struct gt_softc { 58 struct device sc_dev; 59 60 bus_space_tag_t sc_bst; 61 bus_space_handle_t sc_bsh; 62 struct cobalt_pci_chipset sc_pc; 63 }; 64 65 static int gt_match(struct device *, struct cfdata *, void *); 66 static void gt_attach(struct device *, struct device *, void *); 67 static int gt_print(void *aux, const char *pnp); 68 69 static void gt_timer_init(struct gt_softc *sc); 70 static void gt_timer0_init(void *); 71 static long gt_timer0_read(void *); 72 73 CFATTACH_DECL(gt, sizeof(struct gt_softc), 74 gt_match, gt_attach, NULL, NULL); 75 76 static int 77 gt_match(parent, match, aux) 78 struct device *parent; 79 struct cfdata *match; 80 void *aux; 81 { 82 return 1; 83 } 84 85 #define GT_REG_REGION 0x1000 86 87 static void 88 gt_attach(parent, self, aux) 89 struct device *parent; 90 struct device *self; 91 void *aux; 92 { 93 struct mainbus_attach_args *ma = aux; 94 struct gt_softc *sc = (void *)self; 95 #if NPCI > 0 96 pci_chipset_tag_t pc; 97 struct pcibus_attach_args pba; 98 #endif 99 100 sc->sc_bst = ma->ma_iot; 101 if (bus_space_map(sc->sc_bst, ma->ma_addr, GT_REG_REGION, 102 0, &sc->sc_bsh)) { 103 printf(": unable to map GT64111 registers\n"); 104 return; 105 } 106 107 printf("\n"); 108 109 gt_timer_init(sc); 110 111 bus_space_write_4(sc->sc_bst, sc->sc_bsh, GT_PCI_COMMAND, 112 (bus_space_read_4(sc->sc_bst, sc->sc_bsh, GT_PCI_COMMAND) & 113 ~PCI_SYNCMODE) | PCI_PCLK_HIGH); 114 115 #if NPCI > 0 116 pc = &sc->sc_pc; 117 pc->pc_bst = sc->sc_bst; 118 pc->pc_bsh = sc->sc_bsh; 119 120 pba.pba_dmat = &pci_bus_dma_tag; 121 pba.pba_dmat64 = NULL; 122 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 123 pba.pba_bus = 0; 124 pba.pba_bridgetag = NULL; 125 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED | 126 PCI_FLAGS_MRL_OKAY | /*PCI_FLAGS_MRM_OKAY|*/ PCI_FLAGS_MWI_OKAY; 127 pba.pba_pc = pc; 128 config_found_ia(self, "pcibus", &pba, gt_print); 129 #endif 130 } 131 132 static int 133 gt_print(aux, pnp) 134 void *aux; 135 const char *pnp; 136 { 137 /* XXX */ 138 return 0; 139 } 140 141 static void 142 gt_timer_init(struct gt_softc *sc) 143 { 144 145 /* stop timer0 */ 146 bus_space_write_4(sc->sc_bst, sc->sc_bsh, GT_TIMER_CTRL, 147 bus_space_read_4(sc->sc_bst, sc->sc_bsh, GT_TIMER_CTRL) & ~ENTC0); 148 149 timer_start = gt_timer0_init; 150 timer_read = gt_timer0_read; 151 timer_cookie = sc; 152 } 153 154 #define TIMER0_INIT_VALUE 500000 155 156 static void 157 gt_timer0_init(void *cookie) 158 { 159 struct gt_softc *sc = cookie; 160 161 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 162 GT_TIMER_COUNTER0, TIMER0_INIT_VALUE); 163 /* start timer0 */ 164 bus_space_write_4(sc->sc_bst, sc->sc_bsh, GT_TIMER_CTRL, 165 bus_space_read_4(sc->sc_bst, sc->sc_bsh, GT_TIMER_CTRL) | ENTC0); 166 } 167 168 static long 169 gt_timer0_read(void *cookie) 170 { 171 struct gt_softc *sc = cookie; 172 uint32_t counter0; 173 174 counter0 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, GT_TIMER_COUNTER0); 175 counter0 = TIMER0_INIT_VALUE - counter0; 176 #if 0 177 counter /= 50; 178 #else 179 /* 180 * From pmax/pmax/dec_3min.c: 181 * 1/64 + 1/256 + 1/2048 = 41/2048 = 1/49.9512... 182 */ 183 counter0 = (counter0 >> 6) + (counter0 >> 8) + (counter0 >> 11); 184 #endif 185 return counter0; 186 } 187
Indexes created Mon Sep 29 21:09:56 GMT 2025