add35ed5b8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
305 lines
8.4 KiB
C
305 lines
8.4 KiB
C
/*-
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* Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Allwinner A10 attachment driver for the USB Enhanced Host Controller.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_bus.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/condvar.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/gpio.h>
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#include <machine/bus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_util.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/controller/ehci.h>
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#include <dev/usb/controller/ehcireg.h>
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#include "gpio_if.h"
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#include "a10_clk.h"
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#define EHCI_HC_DEVSTR "Allwinner Integrated USB 2.0 controller"
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#define SW_USB_PMU_IRQ_ENABLE 0x800
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#define SW_SDRAM_REG_HPCR_USB1 (0x250 + ((1 << 2) * 4))
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#define SW_SDRAM_REG_HPCR_USB2 (0x250 + ((1 << 2) * 5))
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#define SW_SDRAM_BP_HPCR_ACCESS (1 << 0)
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#define SW_ULPI_BYPASS (1 << 0)
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#define SW_AHB_INCRX_ALIGN (1 << 8)
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#define SW_AHB_INCR4 (1 << 9)
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#define SW_AHB_INCR8 (1 << 10)
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#define GPIO_USB1_PWR 230
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#define GPIO_USB2_PWR 227
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#define A10_READ_4(sc, reg) \
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bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg)
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#define A10_WRITE_4(sc, reg, data) \
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bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg, data)
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static device_attach_t a10_ehci_attach;
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static device_detach_t a10_ehci_detach;
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bs_r_1_proto(reversed);
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bs_w_1_proto(reversed);
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static int
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a10_ehci_probe(device_t self)
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{
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if (!ofw_bus_status_okay(self))
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return (ENXIO);
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if (!ofw_bus_is_compatible(self, "allwinner,usb-ehci"))
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return (ENXIO);
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device_set_desc(self, EHCI_HC_DEVSTR);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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a10_ehci_attach(device_t self)
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{
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ehci_softc_t *sc = device_get_softc(self);
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bus_space_handle_t bsh;
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device_t sc_gpio_dev;
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int err;
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int rid;
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uint32_t reg_value = 0;
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/* initialise some bus fields */
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sc->sc_bus.parent = self;
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sc->sc_bus.devices = sc->sc_devices;
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sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
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/* get all DMA memory */
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if (usb_bus_mem_alloc_all(&sc->sc_bus,
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USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
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return (ENOMEM);
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}
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sc->sc_bus.usbrev = USB_REV_2_0;
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rid = 0;
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sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (!sc->sc_io_res) {
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device_printf(self, "Could not map memory\n");
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goto error;
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}
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sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
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sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
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bsh = rman_get_bushandle(sc->sc_io_res);
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sc->sc_io_size = rman_get_size(sc->sc_io_res);
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if (bus_space_subregion(sc->sc_io_tag, bsh, 0x00,
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sc->sc_io_size, &sc->sc_io_hdl) != 0)
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panic("%s: unable to subregion USB host registers",
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device_get_name(self));
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rid = 0;
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sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (sc->sc_irq_res == NULL) {
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device_printf(self, "Could not allocate irq\n");
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goto error;
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}
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sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
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if (!sc->sc_bus.bdev) {
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device_printf(self, "Could not add USB device\n");
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goto error;
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}
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device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
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device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
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sprintf(sc->sc_vendor, "Allwinner");
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/* Get the GPIO device, we need this to give power to USB */
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sc_gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
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if (sc_gpio_dev == NULL) {
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device_printf(self, "Error: failed to get the GPIO device\n");
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goto error;
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}
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err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
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if (err) {
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device_printf(self, "Could not setup irq, %d\n", err);
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sc->sc_intr_hdl = NULL;
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goto error;
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}
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sc->sc_flags |= EHCI_SCFLG_DONTRESET;
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/* Enable clock for USB */
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a10_clk_usb_activate();
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/* Give power to USB */
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GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_OUTPUT);
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GPIO_PIN_SET(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_HIGH);
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/* Give power to USB */
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GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_OUTPUT);
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GPIO_PIN_SET(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_HIGH);
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/* Enable passby */
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reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
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reg_value |= SW_AHB_INCR8; /* AHB INCR8 enable */
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reg_value |= SW_AHB_INCR4; /* AHB burst type INCR4 enable */
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reg_value |= SW_AHB_INCRX_ALIGN; /* AHB INCRX align enable */
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reg_value |= SW_ULPI_BYPASS; /* ULPI bypass enable */
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A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
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/* Configure port */
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reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
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reg_value |= SW_SDRAM_BP_HPCR_ACCESS;
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A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
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err = ehci_init(sc);
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if (!err) {
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err = device_probe_and_attach(sc->sc_bus.bdev);
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}
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if (err) {
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device_printf(self, "USB init failed err=%d\n", err);
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goto error;
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}
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return (0);
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error:
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a10_ehci_detach(self);
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return (ENXIO);
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}
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static int
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a10_ehci_detach(device_t self)
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{
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ehci_softc_t *sc = device_get_softc(self);
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device_t bdev;
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int err;
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uint32_t reg_value = 0;
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if (sc->sc_bus.bdev) {
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bdev = sc->sc_bus.bdev;
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device_detach(bdev);
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device_delete_child(self, bdev);
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}
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/* during module unload there are lots of children leftover */
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device_delete_children(self);
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if (sc->sc_irq_res && sc->sc_intr_hdl) {
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/*
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* only call ehci_detach() after ehci_init()
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*/
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ehci_detach(sc);
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err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
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if (err)
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/* XXX or should we panic? */
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device_printf(self, "Could not tear down irq, %d\n",
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err);
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sc->sc_intr_hdl = NULL;
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}
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if (sc->sc_irq_res) {
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bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
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sc->sc_irq_res = NULL;
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}
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if (sc->sc_io_res) {
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bus_release_resource(self, SYS_RES_MEMORY, 0,
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sc->sc_io_res);
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sc->sc_io_res = NULL;
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}
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usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
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/* Disable configure port */
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reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
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reg_value &= ~SW_SDRAM_BP_HPCR_ACCESS;
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A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
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/* Disable passby */
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reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
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reg_value &= ~SW_AHB_INCR8; /* AHB INCR8 disable */
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reg_value &= ~SW_AHB_INCR4; /* AHB burst type INCR4 disable */
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reg_value &= ~SW_AHB_INCRX_ALIGN; /* AHB INCRX align disable */
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reg_value &= ~SW_ULPI_BYPASS; /* ULPI bypass disable */
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A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
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/* Disable clock for USB */
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a10_clk_usb_deactivate();
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return (0);
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}
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static device_method_t ehci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, a10_ehci_probe),
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DEVMETHOD(device_attach, a10_ehci_attach),
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DEVMETHOD(device_detach, a10_ehci_detach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD_END
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};
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static driver_t ehci_driver = {
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.name = "ehci",
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.methods = ehci_methods,
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.size = sizeof(ehci_softc_t),
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};
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static devclass_t ehci_devclass;
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DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
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MODULE_DEPEND(ehci, usb, 1, 1, 1);
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