csamidi.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3 
    4  * Copyright (c) 2015-2018 Tai-hwa Liang <avatar@FreeBSD.org>
    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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/types.h>
   31 #include <sys/bus.h>
   32 #include <machine/bus.h>
   33 #include <sys/rman.h>
   34 #include <sys/systm.h>
   35 #include <sys/kobj.h>
   36 #include <sys/lock.h>
   37 #include <sys/mutex.h>
   38 
   39 #ifdef HAVE_KERNEL_OPTION_HEADERS
   40 #include "opt_snd.h"
   41 #endif
   42 
   43 #include <dev/pci/pcireg.h>
   44 #include <dev/pci/pcivar.h>
   45 
   46 #include <dev/sound/chip.h>
   47 #include <dev/sound/pcm/sound.h>
   48 
   49 #include <dev/sound/midi/midi.h>
   50 #include <dev/sound/midi/mpu401.h>
   51 
   52 #include <dev/sound/pci/csareg.h>
   53 #include <dev/sound/pci/csavar.h>
   54 
   55 #include "mpufoi_if.h"
   56 
   57 SND_DECLARE_FILE("$FreeBSD$");
   58 
   59 /* pulled from mpu401.c */
   60 #define MPU_DATAPORT    0
   61 #define MPU_CMDPORT     1
   62 #define MPU_STATPORT    1
   63 #define MPU_RESET       0xff
   64 #define MPU_UART        0x3f
   65 #define MPU_ACK         0xfe
   66 #define MPU_STATMASK    0xc0
   67 #define MPU_OUTPUTBUSY  0x40
   68 #define MPU_INPUTBUSY   0x80
   69 
   70 /* device private data */
   71 struct csa_midi_softc {
   72         /* hardware resources */
   73         int             io_rid;         /* io rid */
   74         struct resource *io;            /* io */
   75 
   76         struct mtx      mtx;
   77         device_t        dev;
   78         struct mpu401   *mpu;
   79         mpu401_intr_t   *mpu_intr;
   80         int             mflags;         /* MIDI flags */
   81 };
   82 
   83 static struct kobj_class csamidi_mpu_class;
   84 
   85 static u_int32_t
   86 csamidi_readio(struct csa_midi_softc *scp, u_long offset)
   87 {
   88         if (offset < BA0_AC97_RESET)
   89                 return bus_space_read_4(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), offset) & 0xffffffff;
   90         else
   91                 return (0);
   92 }
   93 
   94 static void
   95 csamidi_writeio(struct csa_midi_softc *scp, u_long offset, u_int32_t data)
   96 {
   97         if (offset < BA0_AC97_RESET)
   98                 bus_space_write_4(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), offset, data);
   99 }
  100 
  101 static void
  102 csamidi_midi_intr(void *arg)
  103 {
  104         struct csa_midi_softc *scp = (struct csa_midi_softc *)arg;
  105 
  106         if (scp->mpu_intr)
  107                 (scp->mpu_intr)(scp->mpu);
  108 }
  109 
  110 static unsigned char
  111 csamidi_mread(struct mpu401 *arg __unused, void *cookie, int reg)
  112 {
  113         struct csa_midi_softc *scp = cookie;
  114         unsigned int rc;
  115         unsigned int uart_stat;
  116 
  117         rc = 0;
  118         /* hacks to convert hardware status to MPU compatible ones */
  119         switch (reg) {
  120         case MPU_STATPORT:
  121                 uart_stat = csamidi_readio(scp, BA0_MIDSR);
  122                 if (uart_stat & MIDSR_TBF)
  123                         rc |= MPU_OUTPUTBUSY;   /* Tx buffer full */
  124                 if (uart_stat & MIDSR_RBE)
  125                         rc |= MPU_INPUTBUSY;
  126                 break;
  127         case MPU_DATAPORT:
  128                 rc = csamidi_readio(scp, BA0_MIDRP);
  129                 break;
  130         default:
  131                 printf("csamidi_mread: unknown register %d\n", reg);
  132                 break;
  133         }
  134         return (rc);
  135 }
  136 
  137 static void
  138 csamidi_mwrite(struct mpu401 *arg __unused, void *cookie, int reg, unsigned char b)
  139 {
  140         struct csa_midi_softc *scp = cookie;
  141         unsigned int val;
  142 
  143         switch (reg) {
  144         case MPU_CMDPORT:
  145                 switch (b)
  146                 {
  147                 case MPU_RESET:
  148                         /* preserve current operation mode */
  149                         val = csamidi_readio(scp, BA0_MIDCR);
  150                         /* reset the MIDI port */
  151                         csamidi_writeio(scp, BA0_MIDCR, MIDCR_MRST);
  152                         csamidi_writeio(scp, BA0_MIDCR, MIDCR_MLB);
  153                         csamidi_writeio(scp, BA0_MIDCR, 0x00);
  154                         /* restore previous operation mode */
  155                         csamidi_writeio(scp, BA0_MIDCR, val);
  156                         break;
  157                 case MPU_UART:
  158                         /* switch to UART mode, no-op */
  159                 default:
  160                         break;
  161                 }
  162                 break;
  163         case MPU_DATAPORT:
  164                 /* put the MIDI databyte in the write port */
  165                 csamidi_writeio(scp, BA0_MIDWP, b);
  166                 break;
  167         default:
  168                 printf("csamidi_mwrite: unknown register %d\n", reg);
  169                 break;
  170         }
  171 }
  172 
  173 static int
  174 csamidi_muninit(struct mpu401 *arg __unused, void *cookie)
  175 {
  176         struct csa_midi_softc *scp = cookie;
  177 
  178         mtx_lock(&scp->mtx);
  179         scp->mpu_intr = NULL;
  180         mtx_unlock(&scp->mtx);
  181 
  182         return (0);
  183 }
  184 
  185 static int
  186 midicsa_probe(device_t dev)
  187 {
  188         struct sndcard_func *func;
  189 
  190         /* The parent device has already been probed. */
  191 
  192         func = device_get_ivars(dev);
  193         if (func == NULL || func->func != SCF_MIDI)
  194                 return (ENXIO);
  195 
  196         device_set_desc(dev, "CS461x MIDI");
  197         return (0);
  198 }
  199 
  200 static int
  201 midicsa_attach(device_t dev)
  202 {
  203         struct csa_midi_softc *scp;
  204         int rc = ENXIO;
  205 
  206         scp = device_get_softc(dev);
  207 
  208         bzero(scp, sizeof(struct csa_midi_softc));
  209         scp->dev = dev;
  210 
  211         /* allocate the required resources */
  212         scp->io_rid = PCIR_BAR(0);
  213         scp->io = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  214             &scp->io_rid, RF_ACTIVE);
  215         if (scp->io == NULL)
  216                 goto err0;
  217 
  218         /* init the fake MPU401 interface. */
  219         scp->mpu = mpu401_init(&csamidi_mpu_class, scp, csamidi_midi_intr,
  220             &scp->mpu_intr);
  221         if (scp->mpu == NULL) {
  222                 rc = ENOMEM;
  223                 goto err1;
  224         }
  225 
  226         mtx_init(&scp->mtx, device_get_nameunit(dev), "csamidi softc",
  227             MTX_DEF);
  228 
  229         /* reset the MIDI port */
  230         csamidi_writeio(scp, BA0_MIDCR, MIDCR_MRST);
  231         /* MIDI transmit enable, no interrupt */
  232         csamidi_writeio(scp, BA0_MIDCR, MIDCR_TXE | MIDCR_RXE);
  233         csamidi_writeio(scp, BA0_HICR, HICR_IEV | HICR_CHGM);
  234 
  235         return (0);
  236 err1:
  237         bus_release_resource(dev, SYS_RES_MEMORY, scp->io_rid, scp->io);
  238         scp->io = NULL;
  239 err0:
  240         return (rc);
  241 }
  242 
  243 static int
  244 midicsa_detach(device_t dev)
  245 {
  246         struct csa_midi_softc *scp;
  247         int rc = 0;
  248 
  249         scp = device_get_softc(dev);
  250         rc = mpu401_uninit(scp->mpu);
  251         if (rc)
  252                 return (rc);
  253         if (scp->io != NULL) {
  254                 bus_release_resource(dev, SYS_RES_MEMORY, scp->io_rid,
  255                     scp->io);
  256                 scp->io = NULL;
  257         }
  258         mtx_destroy(&scp->mtx);
  259         return (rc);
  260 }
  261 
  262 static kobj_method_t csamidi_mpu_methods[] = {
  263         KOBJMETHOD(mpufoi_read, csamidi_mread),
  264         KOBJMETHOD(mpufoi_write, csamidi_mwrite),
  265         KOBJMETHOD(mpufoi_uninit, csamidi_muninit),
  266         KOBJMETHOD_END
  267 };
  268 
  269 static DEFINE_CLASS(csamidi_mpu, csamidi_mpu_methods, 0);
  270 
  271 static device_method_t midicsa_methods[] = {
  272         DEVMETHOD(device_probe, midicsa_probe),
  273         DEVMETHOD(device_attach, midicsa_attach),
  274         DEVMETHOD(device_detach, midicsa_detach),
  275 
  276         DEVMETHOD_END
  277 };
  278 
  279 static driver_t midicsa_driver = {
  280         "midi",
  281         midicsa_methods,
  282         sizeof(struct csa_midi_softc),
  283 };
  284 DRIVER_MODULE(snd_csa_midi, csa, midicsa_driver, 0, 0);
  285 MODULE_DEPEND(snd_csa_midi, snd_csa, 1, 1, 1);
  286 MODULE_DEPEND(snd_csa_midi, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  287 MODULE_VERSION(snd_csa_midi, 1);

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FreeBSD/Linux Kernel Cross Reference sys/dev/sound/pci/csamidi.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pci/csamidi.c