| 1 | /* $NetBSD: emdtv_ir.c,v 1.2 2016/04/23 10:15:31 skrll Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2008 Jared D. McNeill <jmcneill@invisible.ca> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: emdtv_ir.c,v 1.2 2016/04/23 10:15:31 skrll Exp $" ); |
| 31 | |
| 32 | #include <sys/select.h> |
| 33 | #include <sys/param.h> |
| 34 | #include <sys/systm.h> |
| 35 | #include <sys/device.h> |
| 36 | #include <sys/conf.h> |
| 37 | #include <sys/bus.h> |
| 38 | |
| 39 | #include <dev/usb/usb.h> |
| 40 | #include <dev/usb/usbdi.h> |
| 41 | #include <dev/usb/usbdi_util.h> |
| 42 | #include <dev/usb/usbdivar.h> |
| 43 | #include <dev/usb/usbdevs.h> |
| 44 | |
| 45 | #include <dev/usb/emdtvvar.h> |
| 46 | #include <dev/usb/emdtvreg.h> |
| 47 | |
| 48 | #include <dev/ir/ir.h> |
| 49 | #include <dev/ir/cirio.h> |
| 50 | #include <dev/ir/cirvar.h> |
| 51 | |
| 52 | static void emdtv_ir_intr(struct usbd_xfer *, void *, |
| 53 | usbd_status); |
| 54 | static void emdtv_ir_worker(struct work *, void *); |
| 55 | |
| 56 | static int emdtv_ir_open(void *, int, int, struct proc *); |
| 57 | static int emdtv_ir_close(void *, int, int, struct proc *); |
| 58 | static int emdtv_ir_read(void *, struct uio *, int); |
| 59 | static int emdtv_ir_write(void *, struct uio *, int); |
| 60 | static int emdtv_ir_setparams(void *, struct cir_params *); |
| 61 | |
| 62 | static const struct cir_methods emdtv_ir_methods = { |
| 63 | .im_open = emdtv_ir_open, |
| 64 | .im_close = emdtv_ir_close, |
| 65 | .im_read = emdtv_ir_read, |
| 66 | .im_write = emdtv_ir_write, |
| 67 | .im_setparams = emdtv_ir_setparams, |
| 68 | }; |
| 69 | |
| 70 | void |
| 71 | emdtv_ir_attach(struct emdtv_softc *sc) |
| 72 | { |
| 73 | struct ir_attach_args ia; |
| 74 | usb_endpoint_descriptor_t *ed; |
| 75 | usbd_status status; |
| 76 | int err; |
| 77 | |
| 78 | ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 0); |
| 79 | if (ed == NULL) |
| 80 | return; |
| 81 | |
| 82 | status = usbd_open_pipe_intr(sc->sc_iface, ed->bEndpointAddress, |
| 83 | USBD_EXCLUSIVE_USE, &sc->sc_intr_pipe, sc, &sc->sc_intr_buf, 1, |
| 84 | emdtv_ir_intr, USBD_DEFAULT_INTERVAL); |
| 85 | if (status != USBD_NORMAL_COMPLETION) { |
| 86 | aprint_error_dev(sc->sc_dev, "couldn't open intr pipe: %s\n" , |
| 87 | usbd_errstr(status)); |
| 88 | return; |
| 89 | } |
| 90 | |
| 91 | mutex_init(&sc->sc_ir_mutex, MUTEX_DEFAULT, IPL_VM); |
| 92 | |
| 93 | err = workqueue_create(&sc->sc_ir_wq, "emdtvir" , |
| 94 | emdtv_ir_worker, sc, PRI_NONE, IPL_VM, 0); |
| 95 | if (err) |
| 96 | aprint_error_dev(sc->sc_dev, "couldn't create workqueue: %d\n" , |
| 97 | err); |
| 98 | |
| 99 | ia.ia_type = IR_TYPE_CIR; |
| 100 | ia.ia_methods = &emdtv_ir_methods; |
| 101 | ia.ia_handle = sc; |
| 102 | |
| 103 | sc->sc_cirdev = |
| 104 | config_found_ia(sc->sc_dev, "irbus" , &ia, ir_print); |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | emdtv_ir_detach(struct emdtv_softc *sc, int flags) |
| 109 | { |
| 110 | if (sc->sc_ir_wq != NULL) |
| 111 | workqueue_destroy(sc->sc_ir_wq); |
| 112 | |
| 113 | if (sc->sc_intr_pipe != NULL) { |
| 114 | usbd_abort_pipe(sc->sc_intr_pipe); |
| 115 | usbd_close_pipe(sc->sc_intr_pipe); |
| 116 | sc->sc_intr_pipe = NULL; |
| 117 | } |
| 118 | |
| 119 | mutex_enter(&sc->sc_ir_mutex); |
| 120 | mutex_exit(&sc->sc_ir_mutex); |
| 121 | mutex_destroy(&sc->sc_ir_mutex); |
| 122 | |
| 123 | if (sc->sc_cirdev != NULL) |
| 124 | config_detach(sc->sc_cirdev, flags); |
| 125 | } |
| 126 | |
| 127 | static void |
| 128 | emdtv_ir_intr(struct usbd_xfer *xfer, void * priv, |
| 129 | usbd_status status) |
| 130 | { |
| 131 | struct emdtv_softc *sc = priv; |
| 132 | uint32_t len; |
| 133 | |
| 134 | usbd_get_xfer_status(xfer, NULL, NULL, &len, NULL); |
| 135 | if (status == USBD_CANCELLED) |
| 136 | return; |
| 137 | |
| 138 | if (sc->sc_ir_wq) |
| 139 | workqueue_enqueue(sc->sc_ir_wq, &sc->sc_ir_work, NULL); |
| 140 | } |
| 141 | |
| 142 | static void |
| 143 | emdtv_ir_worker(struct work *wk, void *opaque) |
| 144 | { |
| 145 | struct emdtv_softc *sc = opaque; |
| 146 | struct cir_softc *csc; |
| 147 | uint8_t evt[3]; |
| 148 | int pos; |
| 149 | |
| 150 | if (sc->sc_cirdev == NULL || sc->sc_dying == true || |
| 151 | sc->sc_ir_open == false) |
| 152 | return; |
| 153 | |
| 154 | emdtv_read_multi_1(sc, UR_GET_STATUS, EM28XX_REG_IR, evt, sizeof(evt)); |
| 155 | |
| 156 | csc = device_private(sc->sc_cirdev); |
| 157 | |
| 158 | mutex_enter(&sc->sc_ir_mutex); |
| 159 | pos = (sc->sc_ir_ptr + sc->sc_ir_cnt) % EMDTV_CIR_BUFLEN; |
| 160 | memcpy(&sc->sc_ir_queue[pos], evt, sizeof(evt)); |
| 161 | if (sc->sc_ir_cnt < EMDTV_CIR_BUFLEN - 1) { |
| 162 | ++sc->sc_ir_cnt; |
| 163 | ++csc->sc_rdframes; |
| 164 | } |
| 165 | selnotify(&csc->sc_rdsel, 0, 1); |
| 166 | mutex_exit(&sc->sc_ir_mutex); |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * cir(4) |
| 171 | */ |
| 172 | static int |
| 173 | emdtv_ir_open(void *opaque, int flag, int mode, struct proc *p) |
| 174 | { |
| 175 | struct emdtv_softc *sc = opaque; |
| 176 | |
| 177 | if (sc->sc_ir_open == true) |
| 178 | return EBUSY; |
| 179 | |
| 180 | sc->sc_ir_cnt = 0; |
| 181 | sc->sc_ir_ptr = EMDTV_CIR_BUFLEN - 1; |
| 182 | sc->sc_ir_open = true; |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | emdtv_ir_close(void *opaque, int flag, int mode, struct proc *p) |
| 189 | { |
| 190 | struct emdtv_softc *sc = opaque; |
| 191 | |
| 192 | sc->sc_ir_open = false; |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static int |
| 198 | emdtv_ir_read(void *opaque, struct uio *uio, int flag) |
| 199 | { |
| 200 | struct emdtv_softc *sc = opaque; |
| 201 | struct cir_softc *csc; |
| 202 | int error = 0; |
| 203 | |
| 204 | if (uio->uio_resid != 3) /* 3 byte protocol */ |
| 205 | return EINVAL; |
| 206 | |
| 207 | if (sc->sc_dying) |
| 208 | return EIO; |
| 209 | |
| 210 | csc = device_private(sc->sc_cirdev); |
| 211 | |
| 212 | mutex_enter(&sc->sc_ir_mutex); |
| 213 | if (sc->sc_ir_cnt == 0) |
| 214 | goto out; |
| 215 | |
| 216 | error = uiomove(&sc->sc_ir_queue[sc->sc_ir_ptr], 3, uio); |
| 217 | sc->sc_ir_ptr++; |
| 218 | if (sc->sc_ir_ptr == EMDTV_CIR_BUFLEN) |
| 219 | sc->sc_ir_ptr = 0; |
| 220 | --sc->sc_ir_cnt; |
| 221 | --csc->sc_rdframes; |
| 222 | KASSERT(sc->sc_ir_cnt >= 0); |
| 223 | |
| 224 | out: |
| 225 | mutex_exit(&sc->sc_ir_mutex); |
| 226 | return error; |
| 227 | } |
| 228 | |
| 229 | static int |
| 230 | emdtv_ir_write(void *opaque, struct uio *uio, int flag) |
| 231 | { |
| 232 | return EINVAL; |
| 233 | } |
| 234 | |
| 235 | static int |
| 236 | emdtv_ir_setparams(void *opaque, struct cir_params *cp) |
| 237 | { |
| 238 | return 0; |
| 239 | } |
| 240 | |