Differential D5881 Diff 40632 sys/dev/usb/controller/musb_otg_allwinner.c

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sys/dev/usb/controller/musb_otg_allwinner.c

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				/*-
				* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
				* Copyright (c) 2018 Andrew Turner <andrew@FreeBSD.org>
				* All rights reserved.
				*
				* This software was developed by SRI International and the University of
				* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
				* ("CTSRD"), as part of the DARPA CRASH research programme.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
				* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
				* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
				* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
				* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
				* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
				* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
				* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
				* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* $FreeBSD$
				*/

				/*
				* Allwinner USB Dual-Role Device (DRD) controller
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/systm.h>
				#include <sys/bus.h>
				#include <sys/rman.h>
				#include <sys/kernel.h>
				#include <sys/condvar.h>
				#include <sys/module.h>
				#include <machine/bus.h>

				#include <dev/ofw/ofw_bus.h>
				#include <dev/ofw/ofw_bus_subr.h>

				#include <dev/usb/usb.h>
				#include <dev/usb/usbdi.h>

				#include <dev/usb/usb_core.h>
				#include <dev/usb/usb_busdma.h>
				#include <dev/usb/usb_process.h>
				#include <dev/usb/usb_util.h>

				#include <dev/usb/usb_controller.h>
				#include <dev/usb/usb_bus.h>
				#include <dev/usb/controller/musb_otg.h>

				#include <dev/extres/clk/clk.h>
				#include <dev/extres/hwreset/hwreset.h>

				#ifdef __arm__
				#include <arm/allwinner/aw_machdep.h>
				#include <arm/allwinner/a10_sramc.h>
				manuUnsubmitted Done Inline Actions s/allwinner_machdep/aw_machdep/ manu: s/allwinner_machdep/aw_machdep/
				#endif

				#define DRD_EP_MAX 5

				#define MUSB2_REG_AWIN_VEND0 0x0043
				#define VEND0_PIO_MODE 0

				#if defined(__arm__)
				#define bs_parent_space(bs) ((bs)->bs_parent)
				typedef bus_space_tag_t awusb_bs_tag;
				#elif defined(__aarch64__)
				#define bs_parent_space(bs) (bs)
				typedef void * awusb_bs_tag;
				#endif

				#define AWUSB_OKAY 0x01
				#define AWUSB_NO_CONFDATA 0x02
				static struct ofw_compat_data compat_data[] = {
				{ "allwinner,sun4i-a10-musb", AWUSB_OKAY },
				{ "allwinner,sun6i-a31-musb", AWUSB_OKAY },
				{ "allwinner,sun8i-a33-musb", AWUSB_OKAY \| AWUSB_NO_CONFDATA },
				{ NULL, 0 }
				};

				static const struct musb_otg_ep_cfg musbotg_ep_allwinner[] = {
				{
				.ep_end = 5,
				.ep_fifosz_shift = 9,
				.ep_fifosz_reg = MUSB2_VAL_FIFOSZ_512,
				},
				{
				.ep_end = -1,
				},
				};

				struct awusbdrd_softc {
				struct musbotg_softc sc;
				struct resource *res[2];
				clk_t clk;
				hwreset_t reset;
				struct bus_space bs;
				int flags;
				};

				static struct resource_spec awusbdrd_spec[] = {
				{ SYS_RES_MEMORY, 0, RF_ACTIVE },
				{ SYS_RES_IRQ, 0, RF_ACTIVE },
				{ -1, 0 }
				};

				#define REMAPFLAG 0x8000
				#define REGDECL(a, b) [(a)] = ((b) \| REMAPFLAG)

				/* Allwinner USB DRD register mappings */
				static const uint16_t awusbdrd_regmap[] = {
				REGDECL(MUSB2_REG_EPFIFO(0), 0x0000),
				REGDECL(MUSB2_REG_EPFIFO(1), 0x0004),
				REGDECL(MUSB2_REG_EPFIFO(2), 0x0008),
				REGDECL(MUSB2_REG_EPFIFO(3), 0x000c),
				REGDECL(MUSB2_REG_EPFIFO(4), 0x0010),
				REGDECL(MUSB2_REG_EPFIFO(5), 0x0014),
				REGDECL(MUSB2_REG_POWER, 0x0040),
				REGDECL(MUSB2_REG_DEVCTL, 0x0041),
				REGDECL(MUSB2_REG_EPINDEX, 0x0042),
				REGDECL(MUSB2_REG_INTTX, 0x0044),
				REGDECL(MUSB2_REG_INTRX, 0x0046),
				REGDECL(MUSB2_REG_INTTXE, 0x0048),
				REGDECL(MUSB2_REG_INTRXE, 0x004a),
				REGDECL(MUSB2_REG_INTUSB, 0x004c),
				REGDECL(MUSB2_REG_INTUSBE, 0x0050),
				REGDECL(MUSB2_REG_FRAME, 0x0054),
				REGDECL(MUSB2_REG_TESTMODE, 0x007c),
				REGDECL(MUSB2_REG_TXMAXP, 0x0080),
				REGDECL(MUSB2_REG_TXCSRL, 0x0082),
				REGDECL(MUSB2_REG_TXCSRH, 0x0083),
				REGDECL(MUSB2_REG_RXMAXP, 0x0084),
				REGDECL(MUSB2_REG_RXCSRL, 0x0086),
				REGDECL(MUSB2_REG_RXCSRH, 0x0087),
				REGDECL(MUSB2_REG_RXCOUNT, 0x0088),
				REGDECL(MUSB2_REG_TXTI, 0x008c),
				REGDECL(MUSB2_REG_TXNAKLIMIT, 0x008d),
				REGDECL(MUSB2_REG_RXNAKLIMIT, 0x008f),
				REGDECL(MUSB2_REG_RXTI, 0x008e),
				REGDECL(MUSB2_REG_TXFIFOSZ, 0x0090),
				REGDECL(MUSB2_REG_TXFIFOADD, 0x0092),
				REGDECL(MUSB2_REG_RXFIFOSZ, 0x0094),
				REGDECL(MUSB2_REG_RXFIFOADD, 0x0096),
				REGDECL(MUSB2_REG_FADDR, 0x0098),
				REGDECL(MUSB2_REG_TXFADDR(0), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(0), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(0), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(0), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(0), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(0), 0x009f),
				REGDECL(MUSB2_REG_TXFADDR(1), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(1), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(1), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(1), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(1), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(1), 0x009f),
				REGDECL(MUSB2_REG_TXFADDR(2), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(2), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(2), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(2), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(2), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(2), 0x009f),
				REGDECL(MUSB2_REG_TXFADDR(3), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(3), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(3), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(3), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(3), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(3), 0x009f),
				REGDECL(MUSB2_REG_TXFADDR(4), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(4), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(4), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(4), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(4), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(4), 0x009f),
				REGDECL(MUSB2_REG_TXFADDR(5), 0x0098),
				REGDECL(MUSB2_REG_TXHADDR(5), 0x009a),
				REGDECL(MUSB2_REG_TXHUBPORT(5), 0x009b),
				REGDECL(MUSB2_REG_RXFADDR(5), 0x009c),
				REGDECL(MUSB2_REG_RXHADDR(5), 0x009e),
				REGDECL(MUSB2_REG_RXHUBPORT(5), 0x009f),
				REGDECL(MUSB2_REG_CONFDATA, 0x00c0),
				};

				static bus_size_t
				awusbdrd_reg(bus_size_t o)
				{
				bus_size_t v;

				KASSERT(o < nitems(awusbdrd_regmap),
				("%s: Invalid register %#lx", __func__, o));
				if (o >= nitems(awusbdrd_regmap))
				return (o);

				v = awusbdrd_regmap[o];

				KASSERT((v & REMAPFLAG) != 0, ("%s: reg %#lx not in regmap",
				__func__, o));

				return (v & ~REMAPFLAG);
				}

				static int
				awusbdrd_filt(bus_size_t o)
				{
				switch (o) {
				case MUSB2_REG_MISC:
				case MUSB2_REG_RXDBDIS:
				case MUSB2_REG_TXDBDIS:
				return (1);
				default:
				return (0);
				}
				}

				static uint8_t
				awusbdrd_bs_r_1(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o)
				{
				const struct bus_space *bs = t;

				switch (o) {
				case MUSB2_REG_HWVERS:
				return (0); /* no known equivalent */
				}

				return (bus_space_read_1(bs_parent_space(bs), h, awusbdrd_reg(o)));
				}

				static uint8_t
				awusbdrd_bs_r_1_noconf(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o)
				{

				/*
				* There is no confdata register on some SoCs, return the same
				* magic value as Linux.
				*/
				if (o == MUSB2_REG_CONFDATA)
				return (0xde);

				return (awusbdrd_bs_r_1(t, h, o));
				}


				static uint16_t
				awusbdrd_bs_r_2(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o)
				{
				const struct bus_space *bs = t;

				return bus_space_read_2(bs_parent_space(bs), h, awusbdrd_reg(o));
				}

				static void
				awusbdrd_bs_w_1(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				uint8_t v)
				{
				const struct bus_space *bs = t;

				if (awusbdrd_filt(o) != 0)
				return;

				bus_space_write_1(bs_parent_space(bs), h, awusbdrd_reg(o), v);
				}

				static void
				awusbdrd_bs_w_2(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				uint16_t v)
				{
				const struct bus_space *bs = t;

				if (awusbdrd_filt(o) != 0)
				return;

				bus_space_write_2(bs_parent_space(bs), h, awusbdrd_reg(o), v);
				}

				static void
				awusbdrd_bs_rm_1(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				uint8_t *d, bus_size_t c)
				{
				const struct bus_space *bs = t;

				bus_space_read_multi_1(bs_parent_space(bs), h, awusbdrd_reg(o), d, c);
				}

				static void
				awusbdrd_bs_rm_4(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				uint32_t *d, bus_size_t c)
				{
				const struct bus_space *bs = t;

				bus_space_read_multi_4(bs_parent_space(bs), h, awusbdrd_reg(o), d, c);
				}

				static void
				awusbdrd_bs_wm_1(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				const uint8_t *d, bus_size_t c)
				{
				const struct bus_space *bs = t;

				if (awusbdrd_filt(o) != 0)
				return;

				bus_space_write_multi_1(bs_parent_space(bs), h, awusbdrd_reg(o), d, c);
				}

				static void
				awusbdrd_bs_wm_4(awusb_bs_tag t, bus_space_handle_t h, bus_size_t o,
				const uint32_t *d, bus_size_t c)
				{
				const struct bus_space *bs = t;

				if (awusbdrd_filt(o) != 0)
				return;

				bus_space_write_multi_4(bs_parent_space(bs), h, awusbdrd_reg(o), d, c);
				}

				static void
				awusbdrd_intr(void *arg)
				{
				struct awusbdrd_softc *sc = arg;
				uint8_t intusb;
				uint16_t inttx, intrx;

				intusb = MUSB2_READ_1(&sc->sc, MUSB2_REG_INTUSB);
				inttx = MUSB2_READ_2(&sc->sc, MUSB2_REG_INTTX);
				intrx = MUSB2_READ_2(&sc->sc, MUSB2_REG_INTRX);
				if (intusb == 0 && inttx == 0 && intrx == 0)
				return;

				if (intusb)
				MUSB2_WRITE_1(&sc->sc, MUSB2_REG_INTUSB, intusb);
				if (inttx)
				MUSB2_WRITE_2(&sc->sc, MUSB2_REG_INTTX, inttx);
				if (intrx)
				MUSB2_WRITE_2(&sc->sc, MUSB2_REG_INTRX, intrx);

				musbotg_interrupt(arg, intrx, inttx, intusb);
				}

				static int
				awusbdrd_probe(device_t dev)
				{
				if (!ofw_bus_status_okay(dev))
				return (ENXIO);

				if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
				return (ENXIO);

				device_set_desc(dev, "Allwinner USB DRD");
				return (BUS_PROBE_DEFAULT);
				}

				static int
				awusbdrd_attach(device_t dev)
				{
				struct awusbdrd_softc *sc;
				int error;

				sc = device_get_softc(dev);
				sc->flags = ofw_bus_search_compatible(dev, compat_data)->ocd_data;

				error = bus_alloc_resources(dev, awusbdrd_spec, sc->res);
				if (error != 0)
				return (error);

				/* AHB gate clock is required */
				error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
				if (error != 0)
				goto fail;

				/* AHB reset is only present on some SoCs */
				(void)hwreset_get_by_ofw_idx(dev, 0, 0, &sc->reset);

				/* Enable clocks */
				error = clk_enable(sc->clk);
				if (error != 0) {
				device_printf(dev, "failed to enable clock: %d\n", error);
				goto fail;
				}
				if (sc->reset != NULL) {
				error = hwreset_deassert(sc->reset);
				if (error != 0) {
				device_printf(dev, "failed to de-assert reset: %d\n",
				error);
				goto fail;
				}
				}

				sc->sc.sc_bus.parent = dev;
				sc->sc.sc_bus.devices = sc->sc.sc_devices;
				sc->sc.sc_bus.devices_max = MUSB2_MAX_DEVICES;
				sc->sc.sc_bus.dma_bits = 32;

				error = usb_bus_mem_alloc_all(&sc->sc.sc_bus, USB_GET_DMA_TAG(dev),
				NULL);
				if (error != 0) {
				error = ENOMEM;
				goto fail;
				}

				#if defined(__arm__)
				sc->bs.bs_parent = rman_get_bustag(sc->res[0]);
				#elif defined(__aarch64__)
				sc->bs.bs_cookie = rman_get_bustag(sc->res[0]);
				#endif

				if ((sc->flags & AWUSB_NO_CONFDATA) == AWUSB_NO_CONFDATA)
				sc->bs.bs_r_1 = awusbdrd_bs_r_1_noconf;
				else
				sc->bs.bs_r_1 = awusbdrd_bs_r_1;
				sc->bs.bs_r_2 = awusbdrd_bs_r_2;
				sc->bs.bs_w_1 = awusbdrd_bs_w_1;
				sc->bs.bs_w_2 = awusbdrd_bs_w_2;
				sc->bs.bs_rm_1 = awusbdrd_bs_rm_1;
				sc->bs.bs_rm_4 = awusbdrd_bs_rm_4;
				sc->bs.bs_wm_1 = awusbdrd_bs_wm_1;
				sc->bs.bs_wm_4 = awusbdrd_bs_wm_4;

				sc->sc.sc_io_tag = &sc->bs;
				sc->sc.sc_io_hdl = rman_get_bushandle(sc->res[0]);
				sc->sc.sc_io_size = rman_get_size(sc->res[0]);

				sc->sc.sc_bus.bdev = device_add_child(dev, "usbus", -1);
				if (sc->sc.sc_bus.bdev == NULL) {
				error = ENXIO;
				goto fail;
				}
				device_set_ivars(sc->sc.sc_bus.bdev, &sc->sc.sc_bus);
				sc->sc.sc_id = 0;
				sc->sc.sc_platform_data = sc;
				sc->sc.sc_mode = MUSB2_HOST_MODE; /* XXX HOST vs DEVICE mode */
				sc->sc.sc_ep_max = DRD_EP_MAX;
				sc->sc.sc_ep_cfg = musbotg_ep_allwinner;

				error = bus_setup_intr(dev, sc->res[1], INTR_MPSAFE \| INTR_TYPE_BIO,
				NULL, awusbdrd_intr, sc, &sc->sc.sc_intr_hdl);
				if (error != 0)
				goto fail;

				/* Enable PIO mode */
				bus_write_1(sc->res[0], MUSB2_REG_AWIN_VEND0, VEND0_PIO_MODE);

				#ifdef __arm__
				/* Map SRAMD area to USB0 (sun4i/sun7i only) */
				switch (allwinner_soc_family()) {
				case ALLWINNERSOC_SUN4I:
				case ALLWINNERSOC_SUN7I:
				a10_map_to_otg();
				break;
				}
				#endif

				error = musbotg_init(&sc->sc);
				if (error != 0)
				goto fail;

				error = device_probe_and_attach(sc->sc.sc_bus.bdev);
				if (error != 0)
				goto fail;

				musbotg_vbus_interrupt(&sc->sc, 1); /* XXX VBUS */

				return (0);

				fail:
				if (sc->reset != NULL)
				hwreset_release(sc->reset);
				if (sc->clk != NULL)
				clk_release(sc->clk);
				bus_release_resources(dev, awusbdrd_spec, sc->res);
				return (error);
				}

				static int
				awusbdrd_detach(device_t dev)
				{
				struct awusbdrd_softc *sc;
				device_t bdev;
				int error;

				sc = device_get_softc(dev);

				if (sc->sc.sc_bus.bdev != NULL) {
				bdev = sc->sc.sc_bus.bdev;
				device_detach(bdev);
				device_delete_child(dev, bdev);
				}

				musbotg_uninit(&sc->sc);
				error = bus_teardown_intr(dev, sc->res[1], sc->sc.sc_intr_hdl);
				if (error != 0)
				return (error);

				usb_bus_mem_free_all(&sc->sc.sc_bus, NULL);

				if (sc->reset != NULL)
				hwreset_release(sc->reset);
				if (sc->clk != NULL)
				clk_release(sc->clk);

				bus_release_resources(dev, awusbdrd_spec, sc->res);

				device_delete_children(dev);

				return (0);
				}

				static device_method_t awusbdrd_methods[] = {
				/* Device interface */
				DEVMETHOD(device_probe, awusbdrd_probe),
				DEVMETHOD(device_attach, awusbdrd_attach),
				DEVMETHOD(device_detach, awusbdrd_detach),
				DEVMETHOD(device_suspend, bus_generic_suspend),
				DEVMETHOD(device_resume, bus_generic_resume),
				DEVMETHOD(device_shutdown, bus_generic_shutdown),

				DEVMETHOD_END
				};

				static driver_t awusbdrd_driver = {
				.name = "musbotg",
				.methods = awusbdrd_methods,
				.size = sizeof(struct awusbdrd_softc),
				};

				static devclass_t awusbdrd_devclass;

				DRIVER_MODULE(musbotg, simplebus, awusbdrd_driver, awusbdrd_devclass, 0, 0);
				MODULE_DEPEND(musbotg, usb, 1, 1, 1);