FreeBSD/Linux Kernel Cross Reference
sys/dev/ahci/ahci_mv_fdt.c

     /*
      * Copyright (c) 2017 Semihalf.
      * Copyright (c) 2017 Stormshield.
      * 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/stdint.h>
    #include <sys/stddef.h>
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/module.h>
    #include <sys/sysctl.h>
    #include <sys/rman.h>
    #include <sys/unistd.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <dev/ahci/ahci.h>
    
    #define         AHCI_VENDOR_SPECIFIC_0_ADDR     0xa0
    #define         AHCI_VENDOR_SPECIFIC_0_DATA     0xa4
    
    #define         AHCI_HC_DEVSTR          "Marvell AHCI Controller"
    #define         AHCI_HC_VENDOR          "Marvell"
    
    static device_attach_t ahci_mv_fdt_attach;
    
    static struct ofw_compat_data compatible_data[] = {
            {"marvell,armada-380-ahci",     true},
            {NULL,                          false}
    };
    
    static void
    ahci_mv_regret_config(struct ahci_controller *ctlr)
    {
    
            /*
             * Enable the regret bit to allow the SATA unit to regret
             * a request that didn't receive an acknowledge
             * and a avoid deadlock
             */
            ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_ADDR, 0x4);
            ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_DATA, 0x80);
    }
    
    static int
    ahci_mv_fdt_probe(device_t dev)
    {
    
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_search_compatible(dev, compatible_data)->ocd_data)
                    return (ENXIO);
    
            device_set_desc(dev, AHCI_HC_DEVSTR);
    
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    ahci_mv_fdt_attach(device_t dev)
    {
            struct ahci_controller *ctlr;
            int rc;
    
            ctlr = device_get_softc(dev);
            ctlr->dev = dev;
            ctlr->r_rid = 0;
           ctlr->quirks = AHCI_Q_2CH;
           ctlr->numirqs = 1;
   
           if (ofw_bus_is_compatible(dev, "marvell,armada-380-ahci"))
                   ctlr->quirks |= AHCI_Q_MRVL_SR_DEL;
   
           /* Allocate memory for controller */
           ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
               &ctlr->r_rid, RF_ACTIVE | RF_SHAREABLE);
           if (ctlr->r_mem == NULL) {
                   device_printf(dev, "Failed to alloc memory for controller\n");
                   return (ENOMEM);
           }
   
           /* Reset controller */
           rc = ahci_ctlr_reset(dev);
           if (rc != 0) {
                   device_printf(dev, "Failed to reset controller\n");
                   bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
                   return (ENXIO);
           }
   
           ahci_mv_regret_config(ctlr);
   
           rc = ahci_attach(dev);
           if (rc != 0) {
                   device_printf(dev, "Failed to initialize AHCI, with error %d\n", rc);
                   return (ENXIO);
           }
   
           return (0);
   }
   
   static device_method_t ahci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,                 ahci_mv_fdt_probe),
           DEVMETHOD(device_attach,                ahci_mv_fdt_attach),
           DEVMETHOD(device_detach,                ahci_detach),
           DEVMETHOD(bus_alloc_resource,           ahci_alloc_resource),
           DEVMETHOD(bus_release_resource,         ahci_release_resource),
           DEVMETHOD(bus_setup_intr,               ahci_setup_intr),
           DEVMETHOD(bus_teardown_intr,            ahci_teardown_intr),
           DEVMETHOD(bus_print_child,              ahci_print_child),
           DEVMETHOD(bus_child_location_str,       ahci_child_location_str),
           DEVMETHOD(bus_get_dma_tag,              ahci_get_dma_tag),
           DEVMETHOD_END
   };
   
   static driver_t ahci_driver = {
           "ahci",
           ahci_methods,
           sizeof(struct ahci_controller)
   };
   
   DRIVER_MODULE(ahci_mv, simplebus, ahci_driver, ahci_devclass, NULL, NULL);
   DRIVER_MODULE(ahci_mv, ofwbus, ahci_driver, ahci_devclass, NULL, NULL);

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