src/sys/arch/armv7/omap/amusbss.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  * USB subsystem driver for am335x. Derived from FreeBSD version.
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/device.h>
  32 #include <sys/kernel.h>
  33
  34 #include <dev/ofw/openfirm.h>
  35 #include <dev/ofw/fdt.h>
  36
  37 #include <machine/fdt.h>
  38
  39 #include <arm/simplebus/simplebusvar.h>
  40
  41 #include <armv7/omap/prcmvar.h>
  42
  43 #define DEVNAME(_s) ((_s)->sc_dev.dv_xname)
  44
  45 #define AMUSBSS_DEBUG /* XXX */
  46
  47 #ifdef AMUSBSS_DEBUG
  48 int amusbss_debug = 20;
  49 #define DPRINTF(n,s)            do { if ((n) <= amusbss_debug) printf s; } while (0)
  50 #else
  51 #define DPRINTF(n,s)            do {}
  52 #endif
  53
  54 #define HREAD4(sc, reg)                                                 \
  55         (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
  56 #define HWRITE4(sc, reg, val)                                           \
  57         bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
  58 #define HSET4(sc, reg, bits)                                            \
  59         HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
  60 #define HCLR4(sc, reg, bits)                                            \
  61         HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
  62
  63 #define USBSS_REVREG            0x00
  64 #define USBSS_SYSCONFIG         0x10
  65 #define         USBSS_SYSCONFIG_SRESET          1
  66
  67 #define USBCTRL_REV             0x00
  68 #define USBCTRL_CTRL            0x14
  69 #define USBCTRL_STAT            0x18
  70 #define USBCTRL_IRQ_STAT0       0x30
  71 #define         IRQ_STAT0_RXSHIFT       16
  72 #define         IRQ_STAT0_TXSHIFT       0
  73 #define USBCTRL_IRQ_STAT1       0x34
  74 #define         IRQ_STAT1_DRVVBUS       (1 << 8)
  75 #define USBCTRL_INTEN_SET0      0x38
  76 #define USBCTRL_INTEN_SET1      0x3C
  77 #define         USBCTRL_INTEN_USB_ALL   0x1ff
  78 #define         USBCTRL_INTEN_USB_SOF   (1 << 3)
  79 #define USBCTRL_INTEN_CLR0      0x40
  80 #define USBCTRL_INTEN_CLR1      0x44
  81 #define USBCTRL_UTMI            0xE0
  82 #define         USBCTRL_UTMI_FSDATAEXT          (1 << 1)
  83 #define USBCTRL_MODE            0xE8
  84 #define         USBCTRL_MODE_IDDIG              (1 << 8)
  85 #define         USBCTRL_MODE_IDDIGMUX           (1 << 7)
  86
  87 struct amusbss_softc {
  88         struct device           sc_dev;
  89         bus_space_tag_t         sc_iot;
  90         bus_space_handle_t      sc_ioh;
  91 };
  92
  93 /* Needed in attaching ammusb devices via config_search(9) */
  94 extern struct cfattach ammusb_ca;
  95 //extern void simplebus_attach_node(struct device *, int);
  96
  97 /* core decl */
  98 int  amusbss_match(struct device *, void *, void *);
  99 void amusbss_attach(struct device *, struct device *, void *);
 100 int  amusbss_detach(struct device *, int);
 101 void amusbss_reset(struct amusbss_softc *);
 102
 103 /* debug decl */
 104 void amusbss_preg(uint32_t, char *, struct amusbss_softc *);
 105 void amusbss_dumpregs(struct amusbss_softc *);
 106
 107 /*  core/iomux.c defs */
 108 struct cfattach amusbss_ca = {
 109         sizeof (struct amusbss_softc), amusbss_match, amusbss_attach, amusbss_detach
 110 };
 111
 112 struct cfdriver amusbss_cd = {
 113         NULL, "amusbss", DV_DULL
 114 };
 115
 116 int
 117 amusbss_match(struct device *parent, void *v, void *aux)
 118 {
 119         struct fdt_attach_args *faa = aux;
 120         return OF_is_compatible(faa->fa_node, "ti,am33xx-usb");
 121 }
 122
 123 void
 124 amusbss_attach(struct device *parent, struct device *self, void *args)
 125 {
 126         struct amusbss_softc    *sc = (struct amusbss_softc *) self;
 127         struct fdt_attach_args  *faa = args;
 128         int i, node;
 129         uint32_t rev;
 130
 131         sc->sc_iot = faa->fa_iot;
 132         if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0,
 133             &sc->sc_ioh))
 134                 panic("%s: bus_space_map failed!", __func__);
 135
 136         /* Enable device clocks */
 137         prcm_enablemodule(PRCM_USB);
 138
 139         /* Reset USB subsystem, USB0 and USB1 */
 140         HWRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET);
 141         delay(100);
 142         i = 10;
 143         while (HREAD4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET) {
 144             delay(100);
 145             if (i-- == 0) {
 146                 printf(": reset timeout.\n");
 147                 return;
 148             }
 149         }
 150
 151         rev = HREAD4(sc, USBSS_REVREG);
 152         printf(": rev %d.%d\n", rev >> 4 &0xf, rev & 0xf);
 153
 154         /* Walk the OFW tree and attach top-level devices */
 155         for (node = OF_child(faa->fa_node); node > 0; node = OF_peer(node))
 156             simplebus_attach_node(parent, node);
 157 }
 158
 159 int
 160 amusbss_detach(struct device *self, int flags)
 161 {
 162         return 0; /* XXX */
 163 }
 164