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      1 /* $NetBSD: ehci_fdt.c,v 1.8 2021/08/07 16:19:10 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015-2017 Jared McNeill <jmcneill (at) 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * 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/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ehci_fdt.c,v 1.8 2021/08/07 16:19:10 thorpej Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/bus.h>
     34 #include <sys/device.h>
     35 #include <sys/intr.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.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 <dev/fdt/fdtvar.h>
     47 
     48 static int	ehci_fdt_match(device_t, cfdata_t, void *);
     49 static void	ehci_fdt_attach(device_t, device_t, void *);
     50 
     51 CFATTACH_DECL2_NEW(ehci_fdt, sizeof(struct ehci_softc),
     52 	ehci_fdt_match, ehci_fdt_attach, NULL,
     53 	ehci_activate, NULL, ehci_childdet);
     54 
     55 static const struct device_compatible_entry compat_data[] = {
     56 	{ .compat = "generic-ehci" },
     57 	DEVICE_COMPAT_EOL
     58 };
     59 
     60 static int
     61 ehci_fdt_match(device_t parent, cfdata_t cf, void *aux)
     62 {
     63 	struct fdt_attach_args * const faa = aux;
     64 
     65 	return of_compatible_match(faa->faa_phandle, compat_data);
     66 }
     67 
     68 static void
     69 ehci_fdt_attach(device_t parent, device_t self, void *aux)
     70 {
     71 	struct ehci_softc * const sc = device_private(self);
     72 	struct fdt_attach_args * const faa = aux;
     73 	const int phandle = faa->faa_phandle;
     74 	struct fdtbus_reset *rst;
     75 	struct fdtbus_phy *phy;
     76 	struct clk *clk;
     77 	char intrstr[128];
     78 	bus_addr_t addr;
     79 	bus_size_t size;
     80 	int error;
     81 	void *ih;
     82 	u_int n;
     83 
     84 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
     85 		aprint_error(": couldn't get registers\n");
     86 		return;
     87 	}
     88 
     89 	/* Enable clocks */
     90 	for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++)
     91 		if (clk_enable(clk) != 0) {
     92 			aprint_error(": couldn't enable clock #%d\n", n);
     93 			return;
     94 		}
     95 	/* De-assert resets */
     96 	for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++)
     97 		if (fdtbus_reset_deassert(rst) != 0) {
     98 			aprint_error(": couldn't de-assert reset #%d\n", n);
     99 			return;
    100 		}
    101 
    102 	/* Enable optional phy */
    103 	phy = fdtbus_phy_get(phandle, "usb");
    104 	if (phy && fdtbus_phy_enable(phy, true) != 0) {
    105 		aprint_error(": couldn't enable phy\n");
    106 		return;
    107 	}
    108 
    109 	sc->sc_dev = self;
    110 	sc->sc_bus.ub_hcpriv = sc;
    111 	sc->sc_bus.ub_dmatag = faa->faa_dmat;
    112 	sc->sc_bus.ub_revision = USBREV_2_0;
    113 	if (of_hasprop(phandle, "has-transaction-translator"))
    114 		sc->sc_flags |= EHCIF_ETTF;
    115 	else
    116 		sc->sc_ncomp = 1;
    117 	sc->sc_size = size;
    118 	sc->iot = faa->faa_bst;
    119 	if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) {
    120 		aprint_error(": couldn't map registers\n");
    121 		return;
    122 	}
    123 
    124 	aprint_naive("\n");
    125 	aprint_normal(": EHCI\n");
    126 
    127 	/* Disable interrupts */
    128 	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
    129 	EOWRITE4(sc, EHCI_USBINTR, 0);
    130 
    131 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
    132 		aprint_error_dev(self, "failed to decode interrupt\n");
    133 		return;
    134 	}
    135 
    136 	ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, FDT_INTR_MPSAFE,
    137 	    ehci_intr, sc, device_xname(self));
    138 	if (ih == NULL) {
    139 		aprint_error_dev(self, "couldn't establish interrupt on %s\n",
    140 		    intrstr);
    141 		return;
    142 	}
    143 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
    144 
    145 	error = ehci_init(sc);
    146 	if (error) {
    147 		aprint_error_dev(self, "init failed, error = %d\n", error);
    148 		return;
    149 	}
    150 
    151 	pmf_device_register1(self, NULL, NULL, ehci_shutdown);
    152 
    153 	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
    154 }
    155