FreeBSD/Linux Kernel Cross Reference
sys/arm/freescale/vybrid/vf_ehci.c

     /*-
      * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
      * 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.
     */
    
    /*
     * Vybrid Family Universal Serial Bus (USB) Controller
     * Chapter 44-45, Vybrid Reference Manual, Rev. 5, 07/2013
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.0/sys/arm/freescale/vybrid/vf_ehci.c 294989 2016-01-28 14:11:59Z mmel $");
    
    #include "opt_bus.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/condvar.h>
    #include <sys/rman.h>
    #include <sys/gpio.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_busdma.h>
    #include <dev/usb/usb_process.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 <dev/fdt/fdt_common.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include "gpio_if.h"
    #include "opt_platform.h"
    
    #define ENUTMILEVEL3    (1 << 15)
    #define ENUTMILEVEL2    (1 << 14)
    
    #define GPIO_USB_PWR    134
    
    #define USB_ID          0x000   /* Identification register */
    #define USB_HWGENERAL   0x004   /* Hardware General */
    #define USB_HWHOST      0x008   /* Host Hardware Parameters */
    #define USB_HWDEVICE    0x00C   /* Device Hardware Parameters */
    #define USB_HWTXBUF     0x010   /* TX Buffer Hardware Parameters */
    #define USB_HWRXBUF     0x014   /* RX Buffer Hardware Parameters */
    #define USB_HCSPARAMS   0x104   /* Host Controller Structural Parameters */
    
    #define USBPHY_PWD              0x00    /* PHY Power-Down Register */
    #define USBPHY_PWD_SET          0x04    /* PHY Power-Down Register */
    #define USBPHY_PWD_CLR          0x08    /* PHY Power-Down Register */
    #define USBPHY_PWD_TOG          0x0C    /* PHY Power-Down Register */
    #define USBPHY_TX               0x10    /* PHY Transmitter Control Register */
    #define USBPHY_RX               0x20    /* PHY Receiver Control Register */
    #define USBPHY_RX_SET           0x24    /* PHY Receiver Control Register */
    #define USBPHY_RX_CLR           0x28    /* PHY Receiver Control Register */
    #define USBPHY_RX_TOG           0x2C    /* PHY Receiver Control Register */
    #define USBPHY_CTRL             0x30    /* PHY General Control Register */
    #define USBPHY_CTRL_SET         0x34    /* PHY General Control Register */
    #define USBPHY_CTRL_CLR         0x38    /* PHY General Control Register */
    #define USBPHY_CTRL_TOG         0x3C    /* PHY General Control Register */
    #define USBPHY_STATUS           0x40    /* PHY Status Register */
    #define USBPHY_DEBUG            0x50    /* PHY Debug Register */
    #define USBPHY_DEBUG_SET        0x54    /* PHY Debug Register */
    #define USBPHY_DEBUG_CLR        0x58    /* PHY Debug Register */
    #define USBPHY_DEBUG_TOG        0x5C    /* PHY Debug Register */
    #define USBPHY_DEBUG0_STATUS    0x60    /* UTMI Debug Status Register 0 */
    #define USBPHY_DEBUG1           0x70    /* UTMI Debug Status Register 1 */
    #define USBPHY_DEBUG1_SET       0x74    /* UTMI Debug Status Register 1 */
   #define USBPHY_DEBUG1_CLR       0x78    /* UTMI Debug Status Register 1 */
   #define USBPHY_DEBUG1_TOG       0x7C    /* UTMI Debug Status Register 1 */
   #define USBPHY_VERSION          0x80    /* UTMI RTL Version */
   #define USBPHY_IP               0x90    /* PHY IP Block Register */
   #define USBPHY_IP_SET           0x94    /* PHY IP Block Register */
   #define USBPHY_IP_CLR           0x98    /* PHY IP Block Register */
   #define USBPHY_IP_TOG           0x9C    /* PHY IP Block Register */
   
   #define USBPHY_CTRL_SFTRST      (1U << 31)
   #define USBPHY_CTRL_CLKGATE     (1 << 30)
   #define USBPHY_DEBUG_CLKGATE    (1 << 30)
   
   #define PHY_READ4(_sc, _reg)            \
           bus_space_read_4(_sc->bst_phy, _sc->bsh_phy, _reg)
   #define PHY_WRITE4(_sc, _reg, _val)     \
           bus_space_write_4(_sc->bst_phy, _sc->bsh_phy, _reg, _val)
   
   #define USBC_READ4(_sc, _reg)           \
           bus_space_read_4(_sc->bst_usbc, _sc->bsh_usbc, _reg)
   #define USBC_WRITE4(_sc, _reg, _val)    \
           bus_space_write_4(_sc->bst_usbc, _sc->bsh_usbc, _reg, _val)
   
   /* Forward declarations */
   static int      vybrid_ehci_attach(device_t dev);
   static int      vybrid_ehci_detach(device_t dev);
   static int      vybrid_ehci_probe(device_t dev);
   
   struct vybrid_ehci_softc {
           ehci_softc_t            base;
           device_t                dev;
           struct resource         *res[6];
           bus_space_tag_t         bst_phy;
           bus_space_handle_t      bsh_phy;
           bus_space_tag_t         bst_usbc;
           bus_space_handle_t      bsh_usbc;
   };
   
   static struct resource_spec vybrid_ehci_spec[] = {
           { SYS_RES_MEMORY,       0,      RF_ACTIVE },
           { SYS_RES_MEMORY,       1,      RF_ACTIVE },
           { SYS_RES_MEMORY,       2,      RF_ACTIVE },
           { SYS_RES_IRQ,          0,      RF_ACTIVE },
           { -1, 0 }
   };
   
   static device_method_t ehci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe, vybrid_ehci_probe),
           DEVMETHOD(device_attach, vybrid_ehci_attach),
           DEVMETHOD(device_detach, vybrid_ehci_detach),
           DEVMETHOD(device_suspend, bus_generic_suspend),
           DEVMETHOD(device_resume, bus_generic_resume),
           DEVMETHOD(device_shutdown, bus_generic_shutdown),
   
           /* Bus interface */
           DEVMETHOD(bus_print_child, bus_generic_print_child),
   
           { 0, 0 }
   };
   
   /* kobj_class definition */
   static driver_t ehci_driver = {
           "ehci",
           ehci_methods,
           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);
   
   static void
   vybrid_ehci_post_reset(struct ehci_softc *ehci_softc)
   {
           uint32_t usbmode;
   
           /* Force HOST mode */
           usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_NOLPM);
           usbmode &= ~EHCI_UM_CM;
           usbmode |= EHCI_UM_CM_HOST;
           EOWRITE4(ehci_softc, EHCI_USBMODE_NOLPM, usbmode);
   }
   
   /*
    * Public methods
    */
   static int
   vybrid_ehci_probe(device_t dev)
   {
   
           if (!ofw_bus_status_okay(dev))
                   return (ENXIO);
   
           if (ofw_bus_is_compatible(dev, "fsl,mvf600-usb-ehci") == 0)
                   return (ENXIO);
   
           device_set_desc(dev, "Vybrid Family integrated USB controller");
           return (BUS_PROBE_DEFAULT);
   }
   
   static int
   phy_init(struct vybrid_ehci_softc *esc)
   {
           device_t sc_gpio_dev;
           int reg;
   
           /* Reset phy */
           reg = PHY_READ4(esc, USBPHY_CTRL);
           reg |= (USBPHY_CTRL_SFTRST);
           PHY_WRITE4(esc, USBPHY_CTRL, reg);
   
           /* Minimum reset time */
           DELAY(10000);
   
           reg &= ~(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE);
           PHY_WRITE4(esc, USBPHY_CTRL, reg);
   
           reg = (ENUTMILEVEL2 | ENUTMILEVEL3);
           PHY_WRITE4(esc, USBPHY_CTRL_SET, reg);
   
           /* 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(esc->dev, "Error: failed to get the GPIO dev\n");
                   return (1);
           }
   
           /* Give power to USB */
           GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_OUTPUT);
           GPIO_PIN_SET(sc_gpio_dev, GPIO_USB_PWR, GPIO_PIN_HIGH);
   
           /* Power up PHY */
           PHY_WRITE4(esc, USBPHY_PWD, 0x00);
   
           /* Ungate clocks */
           reg = PHY_READ4(esc, USBPHY_DEBUG);
           reg &= ~(USBPHY_DEBUG_CLKGATE);
           PHY_WRITE4(esc, USBPHY_DEBUG, reg);
   
   #if 0
           printf("USBPHY_CTRL == 0x%08x\n",
               PHY_READ4(esc, USBPHY_CTRL));
           printf("USBPHY_IP == 0x%08x\n",
               PHY_READ4(esc, USBPHY_IP));
           printf("USBPHY_STATUS == 0x%08x\n",
               PHY_READ4(esc, USBPHY_STATUS));
           printf("USBPHY_DEBUG == 0x%08x\n",
               PHY_READ4(esc, USBPHY_DEBUG));
           printf("USBPHY_DEBUG0_STATUS == 0x%08x\n",
               PHY_READ4(esc, USBPHY_DEBUG0_STATUS));
           printf("USBPHY_DEBUG1 == 0x%08x\n",
               PHY_READ4(esc, USBPHY_DEBUG1));
   #endif
   
           return (0);
   }
   
   static int
   vybrid_ehci_attach(device_t dev)
   {
           struct vybrid_ehci_softc *esc;
           ehci_softc_t *sc;
           bus_space_handle_t bsh;
           int err;
           int reg;
   
           esc = device_get_softc(dev);
           esc->dev = dev;
   
           sc = &esc->base;
           sc->sc_bus.parent = dev;
           sc->sc_bus.devices = sc->sc_devices;
           sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
           sc->sc_bus.dma_bits = 32;
   
           if (bus_alloc_resources(dev, vybrid_ehci_spec, esc->res)) {
                   device_printf(dev, "could not allocate resources\n");
                   return (ENXIO);
           }
   
           /* EHCI registers */
           sc->sc_io_tag = rman_get_bustag(esc->res[0]);
           bsh = rman_get_bushandle(esc->res[0]);
           sc->sc_io_size = rman_get_size(esc->res[0]);
   
           esc->bst_usbc = rman_get_bustag(esc->res[1]);
           esc->bsh_usbc = rman_get_bushandle(esc->res[1]);
   
           esc->bst_phy = rman_get_bustag(esc->res[2]);
           esc->bsh_phy = rman_get_bushandle(esc->res[2]);
   
           /* get all DMA memory */
           if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
                   &ehci_iterate_hw_softc))
                   return (ENXIO);
   
   #if 0
           printf("USBx_HCSPARAMS is 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HCSPARAMS));
           printf("USB_ID == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_ID));
           printf("USB_HWGENERAL == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HWGENERAL));
           printf("USB_HWHOST == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HWHOST));
           printf("USB_HWDEVICE == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HWDEVICE));
           printf("USB_HWTXBUF == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HWTXBUF));
           printf("USB_HWRXBUF == 0x%08x\n",
               bus_space_read_4(sc->sc_io_tag, bsh, USB_HWRXBUF));
   #endif
   
           if (phy_init(esc)) {
                   device_printf(dev, "Could not setup PHY\n");
                   return (1);
           }
   
           /*
            * Set handle to USB related registers subregion used by
            * generic EHCI driver.
            */
           err = bus_space_subregion(sc->sc_io_tag, bsh, 0x100,
               sc->sc_io_size, &sc->sc_io_hdl);
           if (err != 0)
                   return (ENXIO);
   
           /* Setup interrupt handler */
           err = bus_setup_intr(dev, esc->res[3], INTR_TYPE_BIO | INTR_MPSAFE,
               NULL, (driver_intr_t *)ehci_interrupt, sc,
               &sc->sc_intr_hdl);
           if (err) {
                   device_printf(dev, "Could not setup irq, "
                       "%d\n", err);
                   return (1);
           }
   
           /* Add USB device */
           sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
           if (!sc->sc_bus.bdev) {
                   device_printf(dev, "Could not add USB device\n");
                   err = bus_teardown_intr(dev, esc->res[5],
                       sc->sc_intr_hdl);
                   if (err)
                           device_printf(dev, "Could not tear down irq,"
                               " %d\n", err);
                   return (1);
           }
           device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
   
           strlcpy(sc->sc_vendor, "Freescale", sizeof(sc->sc_vendor));
   
           /* Set host mode */
           reg = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8);
           reg |= 0x3;
           bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, 0xA8, reg);
   
           /* Set flags  and callbacks*/
           sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
           sc->sc_vendor_post_reset = vybrid_ehci_post_reset;
           sc->sc_vendor_get_port_speed = ehci_get_port_speed_portsc;
   
           err = ehci_init(sc);
           if (!err) {
                   sc->sc_flags |= EHCI_SCFLG_DONEINIT;
                   err = device_probe_and_attach(sc->sc_bus.bdev);
           } else {
                   device_printf(dev, "USB init failed err=%d\n", err);
   
                   device_delete_child(dev, sc->sc_bus.bdev);
                   sc->sc_bus.bdev = NULL;
   
                   err = bus_teardown_intr(dev, esc->res[5],
                       sc->sc_intr_hdl);
                   if (err)
                           device_printf(dev, "Could not tear down irq,"
                               " %d\n", err);
                   return (1);
           }
           return (0);
   }
   
   static int
   vybrid_ehci_detach(device_t dev)
   {
           struct vybrid_ehci_softc *esc;
           ehci_softc_t *sc;
           int err;
   
           esc = device_get_softc(dev);
           sc = &esc->base;
   
           if (sc->sc_flags & EHCI_SCFLG_DONEINIT)
                   return (0);
   
           /*
            * only call ehci_detach() after ehci_init()
            */
           if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
                   ehci_detach(sc);
                   sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
           }
   
           /*
            * Disable interrupts that might have been switched on in
            * ehci_init.
            */
           if (sc->sc_io_tag && sc->sc_io_hdl)
                   bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl,
                       EHCI_USBINTR, 0);
   
           if (esc->res[5] && sc->sc_intr_hdl) {
                   err = bus_teardown_intr(dev, esc->res[5],
                       sc->sc_intr_hdl);
                   if (err) {
                           device_printf(dev, "Could not tear down irq,"
                               " %d\n", err);
                           return (err);
                   }
                   sc->sc_intr_hdl = NULL;
           }
   
           if (sc->sc_bus.bdev) {
                   device_delete_child(dev, sc->sc_bus.bdev);
                   sc->sc_bus.bdev = NULL;
           }
   
           /* During module unload there are lots of children leftover */
           device_delete_children(dev);
   
           bus_release_resources(dev, vybrid_ehci_spec, esc->res);
   
           return (0);
   }

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