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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2013-2014 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 Analog components control digital interface (ANADIG)
     * Chapter 11, Vybrid Reference Manual, Rev. 5, 07/2013
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/malloc.h>
    #include <sys/rman.h>
    #include <sys/timeet.h>
    #include <sys/timetc.h>
    #include <sys/watchdog.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <machine/bus.h>
    #include <machine/cpu.h>
    #include <machine/intr.h>
    
    #include <arm/freescale/vybrid/vf_common.h>
    
    #define ANADIG_PLL3_CTRL        0x010   /* PLL3 Control */
    #define ANADIG_PLL7_CTRL        0x020   /* PLL7 Control */
    #define ANADIG_PLL2_CTRL        0x030   /* PLL2 Control */
    #define ANADIG_PLL2_SS          0x040   /* PLL2 Spread Spectrum */
    #define ANADIG_PLL2_NUM         0x050   /* PLL2 Numerator */
    #define ANADIG_PLL2_DENOM       0x060   /* PLL2 Denominator */
    #define ANADIG_PLL4_CTRL        0x070   /* PLL4 Control */
    #define ANADIG_PLL4_NUM         0x080   /* PLL4 Numerator */
    #define ANADIG_PLL4_DENOM       0x090   /* PLL4 Denominator */
    #define ANADIG_PLL6_CTRL        0x0A0   /* PLL6 Control */
    #define ANADIG_PLL6_NUM         0x0B0   /* PLL6 Numerator */
    #define ANADIG_PLL6_DENOM       0x0C0   /* PLL6 Denominator */
    #define ANADIG_PLL5_CTRL        0x0E0   /* PLL5 Control */
    #define ANADIG_PLL3_PFD         0x0F0   /* PLL3 PFD */
    #define ANADIG_PLL2_PFD         0x100   /* PLL2 PFD */
    #define ANADIG_REG_1P1          0x110   /* Regulator 1P1 */
    #define ANADIG_REG_3P0          0x120   /* Regulator 3P0 */
    #define ANADIG_REG_2P5          0x130   /* Regulator 2P5 */
    #define ANADIG_ANA_MISC0        0x150   /* Analog Miscellaneous */
    #define ANADIG_ANA_MISC1        0x160   /* Analog Miscellaneous */
    #define ANADIG_ANADIG_DIGPROG   0x260   /* Digital Program */
    #define ANADIG_PLL1_CTRL        0x270   /* PLL1 Control */
    #define ANADIG_PLL1_SS          0x280   /* PLL1 Spread Spectrum */
    #define ANADIG_PLL1_NUM         0x290   /* PLL1 Numerator */
    #define ANADIG_PLL1_DENOM       0x2A0   /* PLL1 Denominator */
    #define ANADIG_PLL1_PFD         0x2B0   /* PLL1_PFD */
    #define ANADIG_PLL_LOCK         0x2C0   /* PLL Lock */
    
    #define USB_VBUS_DETECT(n)              (0x1A0 + 0x60 * n)
    #define USB_CHRG_DETECT(n)              (0x1B0 + 0x60 * n)
    #define USB_VBUS_DETECT_STATUS(n)       (0x1C0 + 0x60 * n)
    #define USB_CHRG_DETECT_STATUS(n)       (0x1D0 + 0x60 * n)
    #define USB_LOOPBACK(n)                 (0x1E0 + 0x60 * n)
    #define USB_MISC(n)                     (0x1F0 + 0x60 * n)
    
    #define ANADIG_PLL_LOCKED       (1U << 31)
    #define ENABLE_LINREG           (1 << 0)
    #define EN_CLK_TO_UTMI          (1 << 30)
    
    #define CTRL_BYPASS             (1 << 16)
    #define CTRL_PWR                (1 << 12)
    #define CTRL_PLL_EN             (1 << 13)
   #define EN_USB_CLKS             (1 << 6)
   
   #define PLL4_CTRL_DIV_SEL_S     0
   #define PLL4_CTRL_DIV_SEL_M     0x7f
   
   struct anadig_softc {
           struct resource         *res[1];
           bus_space_tag_t         bst;
           bus_space_handle_t      bsh;
   };
   
   struct anadig_softc *anadig_sc;
   
   static struct resource_spec anadig_spec[] = {
           { SYS_RES_MEMORY,       0,      RF_ACTIVE },
           { -1, 0 }
   };
   
   static int
   anadig_probe(device_t dev)
   {
   
           if (!ofw_bus_status_okay(dev))
                   return (ENXIO);
   
           if (!ofw_bus_is_compatible(dev, "fsl,mvf600-anadig"))
                   return (ENXIO);
   
           device_set_desc(dev, "Vybrid Family ANADIG Unit");
           return (BUS_PROBE_DEFAULT);
   }
   
   static int
   enable_pll(struct anadig_softc *sc, int pll_ctrl)
   {
           int reg;
   
           reg = READ4(sc, pll_ctrl);
           reg &= ~(CTRL_BYPASS | CTRL_PWR);
           if (pll_ctrl == ANADIG_PLL3_CTRL || pll_ctrl == ANADIG_PLL7_CTRL) {
                   /* It is USB PLL. Power bit logic is reversed */
                   reg |= (CTRL_PWR | EN_USB_CLKS);
           }
           WRITE4(sc, pll_ctrl, reg);
   
           /* Wait for PLL lock */
           while (!(READ4(sc, pll_ctrl) & ANADIG_PLL_LOCKED))
                   ;
   
           reg = READ4(sc, pll_ctrl);
           reg |= (CTRL_PLL_EN);
           WRITE4(sc, pll_ctrl, reg);
   
           return (0);
   }
   
   uint32_t
   pll4_configure_output(uint32_t mfi, uint32_t mfn, uint32_t mfd)
   {
           struct anadig_softc *sc;
           int reg;
   
           sc = anadig_sc;
   
           /*
            * PLLout = Fsys * (MFI+(MFN/MFD))
            */
   
           reg = READ4(sc, ANADIG_PLL4_CTRL);
           reg &= ~(PLL4_CTRL_DIV_SEL_M << PLL4_CTRL_DIV_SEL_S);
           reg |= (mfi << PLL4_CTRL_DIV_SEL_S);
           WRITE4(sc, ANADIG_PLL4_CTRL, reg);
           WRITE4(sc, ANADIG_PLL4_NUM, mfn);
           WRITE4(sc, ANADIG_PLL4_DENOM, mfd);
   
           return (0);
   }
   
   static int
   anadig_attach(device_t dev)
   {
           struct anadig_softc *sc;
           int reg;
   
           sc = device_get_softc(dev);
   
           if (bus_alloc_resources(dev, anadig_spec, sc->res)) {
                   device_printf(dev, "could not allocate resources\n");
                   return (ENXIO);
           }
   
           /* Memory interface */
           sc->bst = rman_get_bustag(sc->res[0]);
           sc->bsh = rman_get_bushandle(sc->res[0]);
   
           anadig_sc = sc;
   
           /* Enable USB PLLs */
           enable_pll(sc, ANADIG_PLL3_CTRL);
           enable_pll(sc, ANADIG_PLL7_CTRL);
   
           /* Enable other PLLs */
           enable_pll(sc, ANADIG_PLL1_CTRL);
           enable_pll(sc, ANADIG_PLL2_CTRL);
           enable_pll(sc, ANADIG_PLL4_CTRL);
           enable_pll(sc, ANADIG_PLL5_CTRL);
           enable_pll(sc, ANADIG_PLL6_CTRL);
   
           /* Enable USB voltage regulator */
           reg = READ4(sc, ANADIG_REG_3P0);
           reg |= (ENABLE_LINREG);
           WRITE4(sc, ANADIG_REG_3P0, reg);
   
           /* Give clocks to USB */
           reg = READ4(sc, USB_MISC(0));
           reg |= (EN_CLK_TO_UTMI);
           WRITE4(sc, USB_MISC(0), reg);
   
           reg = READ4(sc, USB_MISC(1));
           reg |= (EN_CLK_TO_UTMI);
           WRITE4(sc, USB_MISC(1), reg);
   
   #if 0
           printf("USB_ANALOG_USB_MISC(0) == 0x%08x\n",
               READ4(sc, USB_ANALOG_USB_MISC(0)));
           printf("USB_ANALOG_USB_MISC(1) == 0x%08x\n",
               READ4(sc, USB_ANALOG_USB_MISC(1)));
   #endif
   
           return (0);
   }
   
   static device_method_t anadig_methods[] = {
           DEVMETHOD(device_probe,         anadig_probe),
           DEVMETHOD(device_attach,        anadig_attach),
           { 0, 0 }
   };
   
   static driver_t anadig_driver = {
           "anadig",
           anadig_methods,
           sizeof(struct anadig_softc),
   };
   
   static devclass_t anadig_devclass;
   
   DRIVER_MODULE(anadig, simplebus, anadig_driver, anadig_devclass, 0, 0);

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