ccu_de2.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2018 Emmanuel Vadot <manu@freebsd.org>
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/bus.h>
   36 #include <sys/rman.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <machine/bus.h>
   40 
   41 #include <dev/fdt/simplebus.h>
   42 
   43 #include <dev/ofw/ofw_bus.h>
   44 #include <dev/ofw/ofw_bus_subr.h>
   45 
   46 #ifdef __aarch64__
   47 #include "opt_soc.h"
   48 #endif
   49 
   50 #include <dev/extres/clk/clk_div.h>
   51 #include <dev/extres/clk/clk_fixed.h>
   52 #include <dev/extres/clk/clk_mux.h>
   53 
   54 #include <dev/extres/hwreset/hwreset.h>
   55 
   56 #include <arm/allwinner/clkng/aw_ccung.h>
   57 
   58 #include <dt-bindings/clock/sun8i-de2.h>
   59 #include <dt-bindings/reset/sun8i-de2.h>
   60 
   61 enum CCU_DE2 {
   62         H3_CCU = 1,
   63         A64_CCU,
   64 };
   65 
   66 /* Non exported clocks */
   67 #define CLK_MIXER0_DIV  3
   68 #define CLK_MIXER1_DIV  4
   69 #define CLK_WB_DIV      5
   70 
   71 static struct aw_ccung_reset h3_de2_ccu_resets[] = {
   72         CCU_RESET(RST_MIXER0, 0x08, 0)
   73         CCU_RESET(RST_WB, 0x08, 2)
   74 };
   75 
   76 static struct aw_ccung_reset a64_de2_ccu_resets[] = {
   77         CCU_RESET(RST_MIXER0, 0x08, 0)
   78         CCU_RESET(RST_MIXER1, 0x08, 1)
   79         CCU_RESET(RST_WB, 0x08, 2)
   80 };
   81 
   82 static struct aw_ccung_gate h3_de2_ccu_gates[] = {
   83         CCU_GATE(CLK_BUS_MIXER0, "mixer0", "mixer0-div", 0x00, 0)
   84         CCU_GATE(CLK_BUS_WB, "wb", "wb-div", 0x00, 2)
   85 
   86         CCU_GATE(CLK_MIXER0, "bus-mixer0", "bus-de", 0x04, 0)
   87         CCU_GATE(CLK_WB, "bus-wb", "bus-de", 0x04, 2)
   88 };
   89 
   90 static struct aw_ccung_gate a64_de2_ccu_gates[] = {
   91         CCU_GATE(CLK_BUS_MIXER0, "mixer0", "mixer0-div", 0x00, 0)
   92         CCU_GATE(CLK_BUS_MIXER1, "mixer1", "mixer1-div", 0x00, 1)
   93         CCU_GATE(CLK_BUS_WB, "wb", "wb-div", 0x00, 2)
   94 
   95         CCU_GATE(CLK_MIXER0, "bus-mixer0", "bus-de", 0x04, 0)
   96         CCU_GATE(CLK_MIXER1, "bus-mixer1", "bus-de", 0x04, 1)
   97         CCU_GATE(CLK_WB, "bus-wb", "bus-de", 0x04, 2)
   98 };
   99 
  100 static const char *div_parents[] = {"de"};
  101 
  102 NM_CLK(mixer0_div_clk,
  103     CLK_MIXER0_DIV,                     /* id */
  104     "mixer0-div", div_parents,          /* names, parents */
  105     0x0C,                               /* offset */
  106     0, 0, 1, AW_CLK_FACTOR_FIXED,       /* N factor (fake)*/
  107     0, 4, 0, 0,                         /* M flags */
  108     0, 0,                               /* mux */
  109     0,                                  /* gate */
  110     AW_CLK_SCALE_CHANGE);       /* flags */
  111 
  112 NM_CLK(mixer1_div_clk,
  113     CLK_MIXER1_DIV,                     /* id */
  114     "mixer1-div", div_parents,          /* names, parents */
  115     0x0C,                               /* offset */
  116     0, 0, 1, AW_CLK_FACTOR_FIXED,       /* N factor (fake)*/
  117     4, 4, 0, 0,                         /* M flags */
  118     0, 0,                               /* mux */
  119     0,                                  /* gate */
  120     AW_CLK_SCALE_CHANGE);               /* flags */
  121 
  122 NM_CLK(wb_div_clk,
  123     CLK_WB_DIV,                         /* id */
  124     "wb-div", div_parents,              /* names, parents */
  125     0x0C,                               /* offset */
  126     0, 0, 1, AW_CLK_FACTOR_FIXED,       /* N factor (fake)*/
  127     8, 4, 0, 0,                         /* M flags */
  128     0, 0,                               /* mux */
  129     0,                                  /* gate */
  130     AW_CLK_SCALE_CHANGE);               /* flags */
  131 
  132 static struct aw_ccung_clk h3_de2_ccu_clks[] = {
  133         { .type = AW_CLK_NM, .clk.nm = &mixer0_div_clk},
  134         { .type = AW_CLK_NM, .clk.nm = &wb_div_clk},
  135 };
  136 
  137 static struct aw_ccung_clk a64_de2_ccu_clks[] = {
  138         { .type = AW_CLK_NM, .clk.nm = &mixer0_div_clk},
  139         { .type = AW_CLK_NM, .clk.nm = &mixer1_div_clk},
  140         { .type = AW_CLK_NM, .clk.nm = &wb_div_clk},
  141 };
  142 
  143 static struct ofw_compat_data compat_data[] = {
  144         {"allwinner,sun8i-h3-de2-clk", H3_CCU},
  145         {"allwinner,sun50i-a64-de2-clk", A64_CCU},
  146         {NULL,             0}
  147 };
  148 
  149 static int
  150 ccu_de2_probe(device_t dev)
  151 {
  152 
  153         if (!ofw_bus_status_okay(dev))
  154                 return (ENXIO);
  155 
  156         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
  157                 return (ENXIO);
  158 
  159         device_set_desc(dev, "Allwinner DE2 Clock Control Unit");
  160         return (BUS_PROBE_DEFAULT);
  161 }
  162 
  163 static int
  164 ccu_de2_attach(device_t dev)
  165 {
  166         struct aw_ccung_softc *sc;
  167         phandle_t node;
  168         clk_t mod, bus;
  169         hwreset_t rst_de;
  170         enum CCU_DE2 type;
  171 
  172         sc = device_get_softc(dev);
  173         node = ofw_bus_get_node(dev);
  174 
  175         type = (enum CCU_DE2)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
  176 
  177         switch (type) {
  178         case H3_CCU:
  179                 sc->resets = h3_de2_ccu_resets;
  180                 sc->nresets = nitems(h3_de2_ccu_resets);
  181                 sc->gates = h3_de2_ccu_gates;
  182                 sc->ngates = nitems(h3_de2_ccu_gates);
  183                 sc->clks = h3_de2_ccu_clks;
  184                 sc->nclks = nitems(h3_de2_ccu_clks);
  185                 break;
  186         case A64_CCU:
  187                 sc->resets = a64_de2_ccu_resets;
  188                 sc->nresets = nitems(a64_de2_ccu_resets);
  189                 sc->gates = a64_de2_ccu_gates;
  190                 sc->ngates = nitems(a64_de2_ccu_gates);
  191                 sc->clks = a64_de2_ccu_clks;
  192                 sc->nclks = nitems(a64_de2_ccu_clks);
  193                 break;
  194         }
  195 
  196         if (hwreset_get_by_ofw_idx(dev, node, 0, &rst_de) != 0) {
  197                 device_printf(dev, "Cannot get de reset\n");
  198                 return (ENXIO);
  199         }
  200         if (hwreset_deassert(rst_de) != 0) {
  201                 device_printf(dev, "Cannot de-assert de reset\n");
  202                 return (ENXIO);
  203         }
  204 
  205         if (clk_get_by_ofw_name(dev, node, "mod", &mod) != 0) {
  206                 device_printf(dev, "Cannot get mod clock\n");
  207                 return (ENXIO);
  208         }
  209         if (clk_enable(mod) != 0) {
  210                 device_printf(dev, "Cannot enable mod clock\n");
  211                 return (ENXIO);
  212         }
  213 
  214         if (clk_get_by_ofw_name(dev, node, "bus", &bus) != 0) {
  215                 device_printf(dev, "Cannot get bus clock\n");
  216                 return (ENXIO);
  217         }
  218         if (clk_enable(bus) != 0) {
  219                 device_printf(dev, "Cannot enable bus clock\n");
  220                 return (ENXIO);
  221         }
  222 
  223         return (aw_ccung_attach(dev));
  224 }
  225 
  226 static device_method_t ccu_de2_methods[] = {
  227         /* Device interface */
  228         DEVMETHOD(device_probe,         ccu_de2_probe),
  229         DEVMETHOD(device_attach,        ccu_de2_attach),
  230 
  231         DEVMETHOD_END
  232 };
  233 
  234 DEFINE_CLASS_1(ccu_de2, ccu_de2_driver, ccu_de2_methods,
  235   sizeof(struct aw_ccung_softc), aw_ccung_driver);
  236 
  237 EARLY_DRIVER_MODULE(ccu_de2, simplebus, ccu_de2_driver, 0, 0,
  238     BUS_PASS_RESOURCE + BUS_PASS_ORDER_LAST);

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FreeBSD/Linux Kernel Cross Reference sys/arm/allwinner/clkng/ccu_de2.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/allwinner/clkng/ccu_de2.c