src/sys/arch/armv7/omap/ammusb.c

   1 /*
   2  * Copyright (c) 2017 Ian Sutton <ian@ce.gl>
   3  * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/param.h>
  28 #include <sys/systm.h>
  29 #include <sys/device.h>
  30 #include <sys/kernel.h>
  31
  32 #include <dev/ofw/openfirm.h>
  33 #include <dev/ofw/fdt.h>
  34
  35 #include <machine/fdt.h>
  36
  37 #include <armv7/omap/prcmvar.h>
  38 #include <armv7/omap/sitara_cm.h>
  39
  40 #include <arm/simplebus/simplebusvar.h>
  41
  42 #define DEVNAME(_s) ((_s)->sc_dev.dv_xname)
  43
  44 #define AMMUSB_DEBUG /* XXX */
  45
  46 #ifdef AMMUSB_DEBUG
  47 int ammusb_debug = 20;
  48 #define DPRINTF(n,s)            do { if ((n) <= ammusb_debug) printf s; } while (0)
  49 #else
  50 #define DPRINTF(n,s)            do {}
  51 #endif
  52
  53 #define HREAD4(sc, reg)                                                 \
  54         (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
  55 #define HWRITE4(sc, reg, val)                                           \
  56         bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
  57 #define HSET4(sc, reg, bits)                                            \
  58         HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
  59 #define HCLR4(sc, reg, bits)                                            \
  60         HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
  61
  62 struct ammusb_softc {
  63         struct device           sc_dev;
  64         bus_space_tag_t         sc_iot;
  65         bus_space_handle_t      sc_ioh;
  66         void                    *sc_ih;
  67 };
  68
  69 /*  core decl */
  70 int  ammusb_match(struct device *, void *, void *);
  71 void ammusb_attach(struct device *, struct device *, void *);
  72 int  ammusb_detach(struct device *, int);
  73 int  ammusb_intr(void *);
  74 void ammusb_reset(struct ammusb_softc *);
  75
  76 /*  debug decl */
  77 void ammusb_preg(uint32_t, char *, struct ammusb_softc *);
  78 void ammusb_dumpregs(struct ammusb_softc *);
  79
  80 /*  core/iomux.c def */
  81 struct cfattach ammusb_ca = {
  82         sizeof (struct ammusb_softc), ammusb_match, ammusb_attach, ammusb_detach
  83 };
  84
  85 struct cfdriver ammusb_cd = {
  86         NULL, "ammusb", DV_DULL
  87 };
  88
  89 int
  90 ammusb_match(struct device *parent, void *v, void *aux)
  91 {
  92         struct fdt_attach_args *faa = aux;
  93 /*      int node;
  94         char name[32];
  95
  96         if (OF_is_compatible(faa->fa_node, "ti,am33xx-usb")) {
  97             printf("!!HIT!!\n");
  98             for (node = OF_child(faa->fa_node); node; node = OF_peer(node)) {
  99
 100             }
 101         }*/
 102         printf("MAYBE: %d\n", faa->fa_node);
 103         return OF_is_compatible(faa->fa_node, "ti,musb-am33xx");
 104 }
 105
 106 void
 107 ammusb_attach(struct device *parent, struct device *self, void *args)
 108 {
 109         struct ammusb_softc     *sc = (struct ammusb_softc *) self;
 110         struct fdt_attach_args *faa = args;
 111
 112         uint32_t rev;
 113
 114         sc->sc_iot = faa->fa_iot;
 115         if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0,
 116             &sc->sc_ioh))
 117                 panic("%s: bus_space_map failed!", __func__);
 118
 119         rev = HREAD4(sc, 0x0);
 120         printf(" rev 0x%08x\n", rev);
 121         printf("%s: phys: 0x%08llx, size: %08llx\n", DEVNAME(sc), faa->fa_reg[0].addr,
 122             faa->fa_reg[0].size);
 123 }
 124
 125 int
 126 ammusb_detach(struct device *self, int flags)
 127 {
 128         return 0; /* XXX */
 129 }
 130
 131 int
 132 ammusb_intr(void * arg)
 133 {
 134         return 0; /* XXX */
 135 }