FreeBSD/Linux Kernel Cross Reference
sys/arm/allwinner/a10_ehci.c

     /*-
      * Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@freebsd.org>
      * All rights reserved.
      *
      * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     */
    
    /*
     * Allwinner A10 attachment driver for the USB Enhanced Host Controller.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.2/sys/arm/allwinner/a10_ehci.c 278278 2015-02-05 20:03:02Z hselasky $");
    
    #include "opt_bus.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/rman.h>
    #include <sys/condvar.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/gpio.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/ehci.h>
    #include <dev/usb/controller/ehcireg.h>
    
    #include "gpio_if.h"
    
    #include "a10_clk.h"
    
    #define EHCI_HC_DEVSTR                  "Allwinner Integrated USB 2.0 controller"
    
    #define SW_USB_PMU_IRQ_ENABLE           0x800
    
    #define SW_SDRAM_REG_HPCR_USB1          (0x250 + ((1 << 2) * 4))
    #define SW_SDRAM_REG_HPCR_USB2          (0x250 + ((1 << 2) * 5))
    #define SW_SDRAM_BP_HPCR_ACCESS         (1 << 0)
    
    #define SW_ULPI_BYPASS                  (1 << 0)
    #define SW_AHB_INCRX_ALIGN              (1 << 8)
    #define SW_AHB_INCR4                    (1 << 9)
    #define SW_AHB_INCR8                    (1 << 10)
    #define GPIO_USB1_PWR                   230
    #define GPIO_USB2_PWR                   227
    
    #define A10_READ_4(sc, reg)             \
            bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg)
    
    #define A10_WRITE_4(sc, reg, data)      \
            bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg, data)
    
    static device_attach_t a10_ehci_attach;
    static device_detach_t a10_ehci_detach;
    
    bs_r_1_proto(reversed);
    bs_w_1_proto(reversed);
    
    static int
    a10_ehci_probe(device_t self)
    {
    
            if (!ofw_bus_status_okay(self))
                    return (ENXIO);
    
           if (!ofw_bus_is_compatible(self, "allwinner,usb-ehci")) 
                   return (ENXIO);
   
           device_set_desc(self, EHCI_HC_DEVSTR);
   
           return (BUS_PROBE_DEFAULT);
   }
   
   static int
   a10_ehci_attach(device_t self)
   {
           ehci_softc_t *sc = device_get_softc(self);
           bus_space_handle_t bsh;
           device_t sc_gpio_dev;
           int err;
           int rid;
           uint32_t reg_value = 0;
   
           /* initialise some bus fields */
           sc->sc_bus.parent = self;
           sc->sc_bus.devices = sc->sc_devices;
           sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
           sc->sc_bus.dma_bits = 32;
   
           /* get all DMA memory */
           if (usb_bus_mem_alloc_all(&sc->sc_bus,
               USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
                   return (ENOMEM);
           }
   
           sc->sc_bus.usbrev = USB_REV_2_0;
   
           rid = 0;
           sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
           if (!sc->sc_io_res) {
                   device_printf(self, "Could not map memory\n");
                   goto error;
           }
   
           sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
           sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
           bsh = rman_get_bushandle(sc->sc_io_res);
   
           sc->sc_io_size = rman_get_size(sc->sc_io_res);
   
           if (bus_space_subregion(sc->sc_io_tag, bsh, 0x00,
               sc->sc_io_size, &sc->sc_io_hdl) != 0)
                   panic("%s: unable to subregion USB host registers",
                       device_get_name(self));
   
           rid = 0;
           sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
               RF_SHAREABLE | RF_ACTIVE);
           if (sc->sc_irq_res == NULL) {
                   device_printf(self, "Could not allocate irq\n");
                   goto error;
           }
           sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
           if (!sc->sc_bus.bdev) {
                   device_printf(self, "Could not add USB device\n");
                   goto error;
           }
           device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
           device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
   
           sprintf(sc->sc_vendor, "Allwinner");
   
           /* Get the GPIO device, we need this to give power to USB */
           sc_gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
           if (sc_gpio_dev == NULL) {
                   device_printf(self, "Error: failed to get the GPIO device\n");
                   goto error;
           }
   
           err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
               NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
           if (err) {
                   device_printf(self, "Could not setup irq, %d\n", err);
                   sc->sc_intr_hdl = NULL;
                   goto error;
           }
   
           sc->sc_flags |= EHCI_SCFLG_DONTRESET;
   
           /* Enable clock for USB */
           a10_clk_usb_activate();
   
           /* Give power to USB */
           GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_OUTPUT);
           GPIO_PIN_SET(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_HIGH);
   
           /* Give power to USB */
           GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_OUTPUT);
           GPIO_PIN_SET(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_HIGH);
   
           /* Enable passby */
           reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
           reg_value |= SW_AHB_INCR8; /* AHB INCR8 enable */
           reg_value |= SW_AHB_INCR4; /* AHB burst type INCR4 enable */
           reg_value |= SW_AHB_INCRX_ALIGN; /* AHB INCRX align enable */
           reg_value |= SW_ULPI_BYPASS; /* ULPI bypass enable */
           A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
   
           /* Configure port */
           reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
           reg_value |= SW_SDRAM_BP_HPCR_ACCESS;
           A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
   
           err = ehci_init(sc);
           if (!err) {
                   err = device_probe_and_attach(sc->sc_bus.bdev);
           }
           if (err) {
                   device_printf(self, "USB init failed err=%d\n", err);
                   goto error;
           }
           return (0);
   
   error:
           a10_ehci_detach(self);
           return (ENXIO);
   }
   
   static int
   a10_ehci_detach(device_t self)
   {
           ehci_softc_t *sc = device_get_softc(self);
           device_t bdev;
           int err;
           uint32_t reg_value = 0;
   
           if (sc->sc_bus.bdev) {
                   bdev = sc->sc_bus.bdev;
                   device_detach(bdev);
                   device_delete_child(self, bdev);
           }
           /* during module unload there are lots of children leftover */
           device_delete_children(self);
   
           if (sc->sc_irq_res && sc->sc_intr_hdl) {
                   /*
                    * only call ehci_detach() after ehci_init()
                    */
                   ehci_detach(sc);
   
                   err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
   
                   if (err)
                           /* XXX or should we panic? */
                           device_printf(self, "Could not tear down irq, %d\n",
                               err);
                   sc->sc_intr_hdl = NULL;
           }
   
           if (sc->sc_irq_res) {
                   bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
                   sc->sc_irq_res = NULL;
           }
           if (sc->sc_io_res) {
                   bus_release_resource(self, SYS_RES_MEMORY, 0,
                       sc->sc_io_res);
                   sc->sc_io_res = NULL;
           }
           usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
   
           /* Disable configure port */
           reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
           reg_value &= ~SW_SDRAM_BP_HPCR_ACCESS;
           A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
   
           /* Disable passby */
           reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
           reg_value &= ~SW_AHB_INCR8; /* AHB INCR8 disable */
           reg_value &= ~SW_AHB_INCR4; /* AHB burst type INCR4 disable */
           reg_value &= ~SW_AHB_INCRX_ALIGN; /* AHB INCRX align disable */
           reg_value &= ~SW_ULPI_BYPASS; /* ULPI bypass disable */
           A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
   
           /* Disable clock for USB */
           a10_clk_usb_deactivate();
   
           return (0);
   }
   
   static device_method_t ehci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe, a10_ehci_probe),
           DEVMETHOD(device_attach, a10_ehci_attach),
           DEVMETHOD(device_detach, a10_ehci_detach),
           DEVMETHOD(device_suspend, bus_generic_suspend),
           DEVMETHOD(device_resume, bus_generic_resume),
           DEVMETHOD(device_shutdown, bus_generic_shutdown),
   
           DEVMETHOD_END
   };
   
   static driver_t ehci_driver = {
           .name = "ehci",
           .methods = ehci_methods,
           .size = sizeof(ehci_softc_t),
   };
   
   static devclass_t ehci_devclass;
   
   DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
   MODULE_DEPEND(ehci, usb, 1, 1, 1);

Cache object: b5dc3fce072c3659f48941eb85de1f75