1 /* $NetBSD: pxa2x0_udc.c,v 1.5 2011/07/01 20:32:51 dyoung Exp $ */ 2 /* $OpenBSD: pxa27x_udc.c,v 1.5 2005/03/30 14:24:39 dlg Exp $ */ 3 4 /* 5 * Copyright (c) 2005 David Gwynne <dlg@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/param.h> 21 #include <sys/systm.h> 22 #include <sys/device.h> 23 #include <sys/kernel.h> 24 25 #include <machine/intr.h> 26 #include <sys/bus.h> 27 28 #include <arm/xscale/pxa2x0cpu.h> 29 #include <arm/xscale/pxa2x0reg.h> 30 #include <arm/xscale/pxa2x0var.h> 31 #include <arm/xscale/pxa2x0_gpio.h> 32 33 struct pxaudc_softc { 34 device_t sc_dev; 35 bus_space_tag_t sc_iot; 36 bus_space_handle_t sc_ioh; 37 bus_size_t sc_size; 38 39 void *sc_powerhook; 40 }; 41 42 static int pxaudc_match(device_t, cfdata_t, void *); 43 static void pxaudc_attach(device_t, device_t, void *); 44 static int pxaudc_detach(device_t, int); 45 46 CFATTACH_DECL_NEW(pxaudc, sizeof(struct pxaudc_softc), 47 pxaudc_match, pxaudc_attach, pxaudc_detach, NULL); 48 49 static void pxaudc_power(int, void *); 50 static void pxaudc_enable(struct pxaudc_softc *); 51 52 static int 53 pxaudc_match(device_t parent, cfdata_t cf, void *aux) 54 { 55 struct pxaip_attach_args *pxa = aux; 56 57 if (CPU_IS_PXA270 && strcmp(pxa->pxa_name, cf->cf_name) == 0) { 58 pxa->pxa_size = PXA270_USBDC_SIZE; 59 return 1; 60 } 61 return 0; 62 } 63 64 static void 65 pxaudc_attach(device_t parent, device_t self, void *aux) 66 { 67 struct pxaudc_softc *sc = device_private(self); 68 struct pxaip_attach_args *pxa = (struct pxaip_attach_args *)aux; 69 70 sc->sc_dev = self; 71 sc->sc_iot = pxa->pxa_iot; 72 sc->sc_size = 0; 73 sc->sc_powerhook = NULL; 74 75 aprint_normal(": USB Device Controller\n"); 76 aprint_naive("\n"); 77 78 if (bus_space_map(sc->sc_iot, pxa->pxa_addr, pxa->pxa_size, 0, 79 &sc->sc_ioh)) { 80 aprint_error_dev(self, "couldn't map memory space\n"); 81 return; 82 } 83 sc->sc_size = pxa->pxa_size; 84 85 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_size, 86 BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE); 87 88 pxa2x0_clkman_config(CKEN_USBDC, 1); 89 90 pxaudc_enable(sc); 91 92 sc->sc_powerhook = powerhook_establish(device_xname(self), 93 pxaudc_power, sc); 94 if (sc->sc_powerhook == NULL) { 95 aprint_error_dev(self, "unable to establish powerhook.\n"); 96 } 97 } 98 99 static int 100 pxaudc_detach(device_t self, int flags) 101 { 102 struct pxaudc_softc *sc = device_private(self); 103 104 if (sc->sc_powerhook) 105 powerhook_disestablish(sc->sc_powerhook); 106 107 if (sc->sc_size) { 108 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size); 109 sc->sc_size = 0; 110 } 111 112 return 0; 113 } 114 115 static void 116 pxaudc_power(int why, void *arg) 117 { 118 struct pxaudc_softc *sc = (struct pxaudc_softc *)arg; 119 120 switch (why) { 121 case PWR_RESUME: 122 pxaudc_enable(sc); 123 break; 124 } 125 } 126 127 static void 128 pxaudc_enable(struct pxaudc_softc *sc) 129 { 130 uint32_t hr; 131 132 /* disable the controller */ 133 hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR); 134 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR, 135 hr & ~USBDC_UDCCR_UDE); 136 137 hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1); 138 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1, 139 hr | USBDC_UDCICR1_IERS); 140 141 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 0); 142 hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR); 143 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 144 hr | USBDC_UP2OCR_HXS); 145 hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR); 146 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 147 hr | USBDC_UP2OCR_HXOE); 148 hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR); 149 bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 150 hr | USBDC_UP2OCR_DPPDE|USBDC_UP2OCR_DMPDE); 151 } 152