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      1 /*	$NetBSD: bcm2835_dwctwo.c,v 1.12 2021/08/07 16:18:43 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nick Hudson
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: bcm2835_dwctwo.c,v 1.12 2021/08/07 16:18:43 thorpej Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 #include <sys/mutex.h>
     39 #include <sys/bus.h>
     40 #include <sys/workqueue.h>
     41 
     42 #include <arm/broadcom/bcm2835reg.h>
     43 
     44 #include <dev/fdt/fdtvar.h>
     45 
     46 #include <dev/usb/usb.h>
     47 #include <dev/usb/usbdi.h>
     48 #include <dev/usb/usbdivar.h>
     49 #include <dev/usb/usb_mem.h>
     50 
     51 #include <dwc2/dwc2var.h>
     52 
     53 #include <dwc2/dwc2.h>
     54 #include "dwc2_core.h"
     55 
     56 struct bcmdwc2_softc {
     57 	struct dwc2_softc	sc_dwc2;
     58 
     59 	void			*sc_ih;
     60 	int			sc_phandle;
     61 };
     62 
     63 static struct dwc2_core_params bcmdwc2_params = {
     64 	.otg_cap			= 0,	/* HNP/SRP capable */
     65 	.otg_ver			= 0,	/* 1.3 */
     66 	.dma_enable			= 1,
     67 	.dma_desc_enable		= 0,
     68 	.speed				= 0,	/* High Speed */
     69 	.enable_dynamic_fifo		= 1,
     70 	.en_multiple_tx_fifo		= 1,
     71 	.host_rx_fifo_size		= 774,	/* 774 DWORDs */
     72 	.host_nperio_tx_fifo_size	= 256,	/* 256 DWORDs */
     73 	.host_perio_tx_fifo_size	= 512,	/* 512 DWORDs */
     74 	.max_transfer_size		= 65535,
     75 	.max_packet_count		= 511,
     76 	.host_channels			= 8,
     77 	.phy_type			= 1,	/* UTMI */
     78 	.phy_utmi_width			= 8,	/* 8 bits */
     79 	.phy_ulpi_ddr			= 0,	/* Single */
     80 	.phy_ulpi_ext_vbus		= 0,
     81 	.i2c_enable			= 0,
     82 	.ulpi_fs_ls			= 0,
     83 	.host_support_fs_ls_low_power	= 0,
     84 	.host_ls_low_power_phy_clk	= 0,	/* 48 MHz */
     85 	.ts_dline			= 0,
     86 	.reload_ctl			= 0,
     87 	.ahbcfg				= 0x10,
     88 	.uframe_sched			= 1,
     89 	.external_id_pin_ctl		= -1,
     90 	.hibernation			= -1,
     91 };
     92 
     93 static int bcmdwc2_match(device_t, struct cfdata *, void *);
     94 static void bcmdwc2_attach(device_t, device_t, void *);
     95 static void bcmdwc2_deferred(device_t);
     96 
     97 CFATTACH_DECL_NEW(bcmdwctwo, sizeof(struct bcmdwc2_softc),
     98     bcmdwc2_match, bcmdwc2_attach, NULL, NULL);
     99 
    100 static const struct device_compatible_entry compat_data[] = {
    101 	{ .compat = "brcm,bcm2708-usb" },
    102 	{ .compat = "brcm,bcm2835-usb" },
    103 	DEVICE_COMPAT_EOL
    104 };
    105 
    106 /* ARGSUSED */
    107 static int
    108 bcmdwc2_match(device_t parent, struct cfdata *match, void *aux)
    109 {
    110 	struct fdt_attach_args * const faa = aux;
    111 
    112 	return of_compatible_match(faa->faa_phandle, compat_data);
    113 }
    114 
    115 /* ARGSUSED */
    116 static void
    117 bcmdwc2_attach(device_t parent, device_t self, void *aux)
    118 {
    119 	struct bcmdwc2_softc *sc = device_private(self);
    120 	struct fdt_attach_args * const faa = aux;
    121 	const int phandle = faa->faa_phandle;
    122 	bus_addr_t addr;
    123 	bus_size_t size;
    124 	int error;
    125 
    126 	aprint_naive(": USB controller\n");
    127 	aprint_normal(": USB controller\n");
    128 
    129 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
    130 		aprint_error(": couldn't get registers\n");
    131 		return;
    132 	}
    133 
    134 	sc->sc_phandle = phandle;
    135 	sc->sc_dwc2.sc_dev = self;
    136 	sc->sc_dwc2.sc_iot = faa->faa_bst;
    137 	sc->sc_dwc2.sc_bus.ub_dmatag = faa->faa_dmat;
    138 	sc->sc_dwc2.sc_params = &bcmdwc2_params;
    139 
    140 	error = bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_dwc2.sc_ioh);
    141 	if (error) {
    142 		aprint_error(": couldn't map device\n");
    143 		return;
    144 	}
    145 
    146 	char intrstr[128];
    147 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
    148 		aprint_error(": failed to decode interrupt\n");
    149 		return;
    150 	}
    151 
    152 	sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_VM, FDT_INTR_MPSAFE,
    153 	    dwc2_intr, &sc->sc_dwc2, device_xname(self));
    154 
    155 	if (sc->sc_ih == NULL) {
    156 		aprint_error_dev(self, "failed to establish interrupt %s\n",
    157 		    intrstr);
    158 		goto fail;
    159 	}
    160 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
    161 	config_interrupts(self, bcmdwc2_deferred);
    162 
    163 	return;
    164 
    165 fail:
    166 	if (sc->sc_ih) {
    167 		fdtbus_intr_disestablish(sc->sc_phandle, sc->sc_ih);
    168 		sc->sc_ih = NULL;
    169 	}
    170 	bus_space_unmap(sc->sc_dwc2.sc_iot, sc->sc_dwc2.sc_ioh, size);
    171 }
    172 
    173 static void
    174 bcmdwc2_deferred(device_t self)
    175 {
    176 	struct bcmdwc2_softc *sc = device_private(self);
    177 	int error;
    178 
    179 	error = dwc2_init(&sc->sc_dwc2);
    180 	if (error != 0) {
    181 		aprint_error_dev(self, "couldn't initialize host, error=%d\n",
    182 		    error);
    183 		return;
    184 	}
    185 	sc->sc_dwc2.sc_child = config_found(sc->sc_dwc2.sc_dev,
    186 	    &sc->sc_dwc2.sc_bus, usbctlprint, CFARGS_NONE);
    187 }
    188