1 /* $OpenBSD: omapid.c,v 1.2 2013/11/06 19:03:07 syl Exp $ */ 2 /* 3 * Copyright (c) 2013 Dale Rahn <drahn@dalerahn.com> 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/queue.h> 21 #include <sys/malloc.h> 22 #include <sys/device.h> 23 #include <sys/evcount.h> 24 #include <sys/socket.h> 25 #include <sys/timeout.h> 26 #include <machine/intr.h> 27 #include <machine/bus.h> 28 #include <armv7/armv7/armv7var.h> 29 30 /* registers */ 31 #define O4_ID_SIZE 0x1000 32 #define O4_FUSE_ID0 0x200 33 #define O4_ID_CODE 0x204 34 #define O4_FUSE_ID1 0x208 35 #define O4_FUSE_ID2 0x20C 36 #define O4_FUSE_ID3 0x210 37 #define O4_FUSE_PRODID0 0x214 38 #define O4_FUSE_PRODID1 0x218 39 40 41 struct omapid_softc { 42 struct device sc_dev; 43 bus_space_tag_t sc_iot; 44 bus_space_handle_t sc_ioh; 45 }; 46 47 struct omapid_softc *omapid_sc; 48 49 50 void omapid_attach(struct device *parent, struct device *self, void *args); 51 void omapid_wpending(int flags); 52 53 struct cfattach omapid_ca = { 54 sizeof (struct omapid_softc), NULL, omapid_attach 55 }; 56 57 struct cfdriver omapid_cd = { 58 NULL, "omapid", DV_DULL 59 }; 60 61 void amptimer_set_clockrate(int32_t new_frequency); /* XXX */ 62 63 void 64 omapid_attach(struct device *parent, struct device *self, void *args) 65 { 66 struct armv7_attach_args *aa = args; 67 struct omapid_softc *sc = (struct omapid_softc *) self; 68 uint32_t rev; 69 uint32_t newclockrate = 0; 70 char *board; 71 72 sc->sc_iot = aa->aa_iot; 73 if (bus_space_map(sc->sc_iot, aa->aa_dev->mem[0].addr, 74 aa->aa_dev->mem[0].size, 0, &sc->sc_ioh)) 75 panic("omapid: bus_space_map failed!"); 76 77 omapid_sc = sc; 78 79 board = "unknown"; 80 switch (board_id) { 81 case BOARD_ID_OMAP4_PANDA: 82 rev = bus_space_read_4(sc->sc_iot, sc->sc_ioh, O4_ID_CODE); 83 switch ((rev >> 12) & 0xffff) { 84 case 0xB852: 85 case 0xB95C: 86 board = "omap4430"; 87 newclockrate = 400 * 1000 * 1000; 88 break; 89 case 0xB94E: 90 board = "omap4460"; 91 newclockrate = 350 * 1000 * 1000; 92 break; 93 } 94 break; 95 default: 96 break; 97 } 98 printf(": %s\n", board); 99 if (newclockrate != 0) 100 amptimer_set_clockrate(newclockrate); 101 } 102