1 /* $OpenBSD: ucc.c,v 1.37 2022/11/14 00:16:46 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2021 Anton Lindqvist <anton@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/device.h> 22 23 #include <dev/usb/usb.h> 24 #include <dev/usb/usbhid.h> 25 #include <dev/usb/usbdi.h> 26 #include <dev/usb/uhidev.h> 27 28 #include <dev/hid/hidccvar.h> 29 30 struct ucc_softc { 31 struct uhidev sc_hdev; 32 struct hidcc *sc_cc; 33 }; 34 35 int ucc_match(struct device *, void *, void *); 36 void ucc_attach(struct device *, struct device *, void *); 37 int ucc_detach(struct device *, int); 38 void ucc_intr(struct uhidev *, void *, u_int); 39 40 int ucc_enable(void *, int); 41 42 struct cfdriver ucc_cd = { 43 NULL, "ucc", DV_DULL 44 }; 45 46 const struct cfattach ucc_ca = { 47 sizeof(struct ucc_softc), 48 ucc_match, 49 ucc_attach, 50 ucc_detach, 51 }; 52 53 int 54 ucc_match(struct device *parent, void *match, void *aux) 55 { 56 struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; 57 void *desc; 58 int size; 59 60 if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha)) 61 return UMATCH_NONE; 62 63 uhidev_get_report_desc(uha->parent, &desc, &size); 64 if (hid_report_size(desc, size, hid_input, uha->reportid) == 0) 65 return UMATCH_NONE; 66 if (!hidcc_match(desc, size, uha->reportid)) 67 return UMATCH_NONE; 68 69 return UMATCH_IFACECLASS; 70 } 71 72 void 73 ucc_attach(struct device *parent, struct device *self, void *aux) 74 { 75 struct ucc_softc *sc = (struct ucc_softc *)self; 76 struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; 77 void *desc; 78 int repid, size; 79 80 sc->sc_hdev.sc_intr = ucc_intr; 81 sc->sc_hdev.sc_parent = uha->parent; 82 sc->sc_hdev.sc_udev = uha->uaa->device; 83 sc->sc_hdev.sc_report_id = uha->reportid; 84 85 uhidev_get_report_desc(uha->parent, &desc, &size); 86 repid = uha->reportid; 87 sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid); 88 sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid); 89 sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid); 90 91 struct hidcc_attach_arg hca = { 92 .device = &sc->sc_hdev.sc_dev, 93 .audio_cookie = uha->uaa->cookie, 94 .desc = desc, 95 .descsiz = size, 96 .repid = repid, 97 .isize = sc->sc_hdev.sc_isize, 98 .enable = ucc_enable, 99 .arg = self, 100 }; 101 sc->sc_cc = hidcc_attach(&hca); 102 } 103 104 int 105 ucc_detach(struct device *self, int flags) 106 { 107 struct ucc_softc *sc = (struct ucc_softc *)self; 108 int error = 0; 109 110 uhidev_close(&sc->sc_hdev); 111 if (sc->sc_cc != NULL) 112 error = hidcc_detach(sc->sc_cc, flags); 113 return error; 114 } 115 116 void 117 ucc_intr(struct uhidev *addr, void *data, u_int len) 118 { 119 struct ucc_softc *sc = (struct ucc_softc *)addr; 120 121 if (sc->sc_cc != NULL) 122 hidcc_intr(sc->sc_cc, data, len); 123 } 124 125 int 126 ucc_enable(void *v, int on) 127 { 128 struct ucc_softc *sc = (struct ucc_softc *)v; 129 int error = 0; 130 131 if (on) 132 error = uhidev_open(&sc->sc_hdev); 133 else 134 uhidev_close(&sc->sc_hdev); 135 return error; 136 } 137