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      1 /* $NetBSD: ti_ehci.c,v 1.5 2021/08/07 16:18:46 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015-2019 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: ti_ehci.c,v 1.5 2021/08/07 16:18:46 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 #define	TI_EHCI_NPORTS	3
     49 
     50 static int	ti_ehci_match(device_t, cfdata_t, void *);
     51 static void	ti_ehci_attach(device_t, device_t, void *);
     52 
     53 CFATTACH_DECL2_NEW(ti_ehci, sizeof(struct ehci_softc),
     54 	ti_ehci_match, ti_ehci_attach, NULL,
     55 	ehci_activate, NULL, ehci_childdet);
     56 
     57 static const struct device_compatible_entry compat_data[] = {
     58 	{ .compat = "ti,ehci-omap" },
     59 	DEVICE_COMPAT_EOL
     60 };
     61 
     62 static int
     63 ti_ehci_match(device_t parent, cfdata_t cf, void *aux)
     64 {
     65 	struct fdt_attach_args * const faa = aux;
     66 
     67 	return of_compatible_match(faa->faa_phandle, compat_data);
     68 }
     69 
     70 static void
     71 ti_ehci_attach(device_t parent, device_t self, void *aux)
     72 {
     73 	struct ehci_softc * const sc = device_private(self);
     74 	struct fdt_attach_args * const faa = aux;
     75 	const int phandle = faa->faa_phandle;
     76 	struct fdtbus_reset *rst;
     77 	struct fdtbus_phy *phy;
     78 	struct clk *clk;
     79 	char intrstr[128];
     80 	bus_addr_t addr;
     81 	bus_size_t size;
     82 	int error;
     83 	void *ih;
     84 	u_int n;
     85 
     86 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
     87 		aprint_error(": couldn't get registers\n");
     88 		return;
     89 	}
     90 
     91 	/* Enable clocks */
     92 	for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++)
     93 		if (clk_enable(clk) != 0) {
     94 			aprint_error(": couldn't enable clock #%d\n", n);
     95 			return;
     96 		}
     97 	/* De-assert resets */
     98 	for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++)
     99 		if (fdtbus_reset_deassert(rst) != 0) {
    100 			aprint_error(": couldn't de-assert reset #%d\n", n);
    101 			return;
    102 		}
    103 
    104 	sc->sc_dev = self;
    105 	sc->sc_bus.ub_hcpriv = sc;
    106 	sc->sc_bus.ub_dmatag = faa->faa_dmat;
    107 	sc->sc_bus.ub_revision = USBREV_2_0;
    108 	if (of_hasprop(phandle, "has-transaction-translator"))
    109 		sc->sc_flags |= EHCIF_ETTF;
    110 	else
    111 		sc->sc_ncomp = 1;
    112 	sc->sc_size = size;
    113 	sc->iot = faa->faa_bst;
    114 	if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) {
    115 		aprint_error(": couldn't map registers\n");
    116 		return;
    117 	}
    118 
    119 	aprint_naive("\n");
    120 	aprint_normal(": EHCI\n");
    121 
    122 	/* Enable PHYs */
    123 	for (n = 0; n < TI_EHCI_NPORTS; n++) {
    124 		phy = fdtbus_phy_get_index(phandle, n);
    125 		if (phy && fdtbus_phy_enable(phy, true) != 0) {
    126 			aprint_error(": couldn't enable phy\n");
    127 			return;
    128 		}
    129 	}
    130 
    131 	/* Disable interrupts */
    132 	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
    133 	EOWRITE4(sc, EHCI_USBINTR, 0);
    134 
    135 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
    136 		aprint_error_dev(self, "failed to decode interrupt\n");
    137 		return;
    138 	}
    139 
    140 	ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, FDT_INTR_MPSAFE,
    141 	    ehci_intr, sc, device_xname(self));
    142 	if (ih == NULL) {
    143 		aprint_error_dev(self, "couldn't establish interrupt on %s\n",
    144 		    intrstr);
    145 		return;
    146 	}
    147 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
    148 
    149 	error = ehci_init(sc);
    150 	if (error) {
    151 		aprint_error_dev(self, "init failed, error = %d\n", error);
    152 		return;
    153 	}
    154 
    155 	pmf_device_register1(self, NULL, NULL, ehci_shutdown);
    156 
    157 	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
    158 }
    159