| 1 | /* |
| 2 | * Copyright (c) 2017 Ian Sutton <ian@ce.gl> |
| 3 | * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. |
| 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 | #include <sys/rwlock.h> |
| 32 | |
| 33 | #include <machine/intr.h> |
| 34 | |
| 35 | #include <dev/ofw/openfirm.h> |
| 36 | #include <dev/ofw/fdt.h> |
| 37 | #include <machine/fdt.h> |
| 38 | |
| 39 | #include <dev/usb/usb.h> |
| 40 | #include <dev/usb/usbdi.h> |
| 41 | #include <dev/usb/usbdivar.h> |
| 42 | #include <dev/usb/usb_mem.h> |
| 43 | #include <dev/usb/ehcireg.h> |
| 44 | #include <dev/usb/ehcivar.h> |
| 45 | |
| 46 | #include <armv7/omap/prcmvar.h> |
| 47 | #include <armv7/omap/sitara_cm.h> |
| 48 | |
| 49 | #include <arm/simplebus/simplebusvar.h> |
| 50 | |
| 51 | #define DEVNAME(_s) ((_s)->sc_dev.dv_xname) |
| 52 | |
| 53 | #define AMMUSB_DEBUG /* XXX */ |
| 54 | |
| 55 | #ifdef AMMUSB_DEBUG |
| 56 | int ammusb_debug = 20; |
| 57 | #define DPRINTF(n,s) do { if ((n) <= ammusb_debug) printf s; } while (0) |
| 58 | #else |
| 59 | #define DPRINTF(n,s) do {} |
| 60 | #endif |
| 61 | |
| 62 | #define HREAD4(sc, handle, reg) \ |
| 63 | (bus_space_read_4((sc)->sc_iot, (handle), (reg))) |
| 64 | #define HWRITE4(sc, handle, reg, val) \ |
| 65 | bus_space_write_4((sc)->sc_iot, (handle), (reg), (val)) |
| 66 | #define HSET4(sc, handle, reg, bits) \ |
| 67 | HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) | (bits)) |
| 68 | #define HCLR4(sc, handle, reg, bits) \ |
| 69 | HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) & ~(bits)) |
| 70 | |
| 71 | enum OTG_STATE { |
| 72 | OTG_HOST, |
| 73 | OTG_CLIENT, |
| 74 | }; |
| 75 | |
| 76 | struct ammusb_softc { |
| 77 | struct device sc_dev; |
| 78 | bus_space_tag_t sc_iot; |
| 79 | void *sc_ih; |
| 80 | |
| 81 | bus_space_handle_t sc_ioh_ctl; |
| 82 | bus_size_t sc_ios_ctl; |
| 83 | bus_space_handle_t sc_ioh_core; |
| 84 | bus_size_t sc_ios_core; |
| 85 | bus_space_handle_t sc_ioh_phy; |
| 86 | bus_size_t sc_ios_phy; |
| 87 | |
| 88 | char sc_phys[32]; |
| 89 | enum OTG_STATE sc_otg_state; |
| 90 | }; |
| 91 | |
| 92 | /* core decl */ |
| 93 | int ammusb_match(struct device *, void *, void *); |
| 94 | void ammusb_attach(struct device *, struct device *, void *); |
| 95 | int ammusb_detach(struct device *, int); |
| 96 | int ammusb_intr(void *); |
| 97 | void ammusb_reset(struct ammusb_softc *); |
| 98 | |
| 99 | /* debug decl */ |
| 100 | void ammusb_preg(uint32_t, char *, struct ammusb_softc *); |
| 101 | void ammusb_dumpregs(struct ammusb_softc *); |
| 102 | |
| 103 | /* core/iomux.c def */ |
| 104 | struct cfattach ammusb_ca = { |
| 105 | sizeof (struct ammusb_softc), ammusb_match, ammusb_attach, ammusb_detach |
| 106 | }; |
| 107 | |
| 108 | struct cfdriver ammusb_cd = { |
| 109 | NULL, "ammusb", DV_DULL |
| 110 | }; |
| 111 | |
| 112 | int |
| 113 | ammusb_match(struct device *parent, void *v, void *aux) |
| 114 | { |
| 115 | struct fdt_attach_args *faa = aux; |
| 116 | return OF_is_compatible(faa->fa_node, "ti,musb-am33xx"); |
| 117 | } |
| 118 | |
| 119 | void |
| 120 | ammusb_attach(struct device *parent, struct device *self, void *args) |
| 121 | { |
| 122 | struct ammusb_softc *sc = (struct ammusb_softc *) self; |
| 123 | struct fdt_attach_args *faa = args; |
| 124 | |
| 125 | uint32_t rev, phy_reg[2]; |
| 126 | int phy_node; |
| 127 | |
| 128 | phy_node = -1; |
| 129 | |
| 130 | sc->sc_iot = faa->fa_iot; |
| 131 | |
| 132 | /* find our corresponding PHY regs */ |
| 133 | if ((phy_node = OF_getnodebyphandle(0x3c)) == -1) { |
| 134 | printf(": couldn't find PHY\n"); |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | OF_getpropintarray(phy_node, "reg", phy_reg, sizeof(phy_reg)); |
| 139 | |
| 140 | if (bus_space_map(sc->sc_iot, phy_reg[0], phy_reg[1], 0, |
| 141 | &sc->sc_ioh_phy)) |
| 142 | panic("%s: bus_space_map failed!", __func__); |
| 143 | if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0, |
| 144 | &sc->sc_ioh_core)) |
| 145 | panic("%s: bus_space_map failed!", __func__); |
| 146 | if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr, faa->fa_reg[1].size, 0, |
| 147 | &sc->sc_ioh_ctl)) |
| 148 | panic("%s: bus_space_map failed!", __func__); |
| 149 | |
| 150 | /* not the right revision number XXX */ |
| 151 | rev = HREAD4(sc, sc->sc_ioh_ctl, 0x0); |
| 152 | printf(": rev %d.%d\n", rev >> 4 &0xf, rev & 0xf); |
| 153 | |
| 154 | sc->sc_ih = arm_intr_establish_fdt(faa->fa_node, IPL_USB, ehci_intr, |
| 155 | &sc->sc_dev, DEVNAME(sc)); |
| 156 | |
| 157 | /* XXX set OTG state here */ |
| 158 | } |
| 159 | |
| 160 | int |
| 161 | ammusb_detach(struct device *self, int flags) |
| 162 | { |
| 163 | return 0; /* XXX */ |
| 164 | } |
| 165 | |
| 166 | int |
| 167 | ammusb_intr(void * arg) |
| 168 | { |
| 169 | return 0; /* XXX */ |
| 170 | } |