a37x0_periph_clk_driver.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2021 Semihalf.
    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 AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, 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 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/bus.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/mutex.h>
   36 #include <sys/rman.h>
   37 #include <machine/bus.h>
   38 
   39 #include <dev/fdt/simplebus.h>
   40 
   41 #include <dev/extres/clk/clk.h>
   42 #include <dev/extres/clk/clk_fixed.h>
   43 
   44 #include <dev/ofw/ofw_bus.h>
   45 #include <dev/ofw/ofw_bus_subr.h>
   46 
   47 #include "clkdev_if.h"
   48 #include "periph.h"
   49 
   50 #define TBG_COUNT 4
   51 #define XTAL_OFW_INDEX 4
   52 
   53 static struct resource_spec a37x0_periph_clk_spec[] = {
   54         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   55         { -1, 0 }
   56 };
   57 
   58 int
   59 a37x0_periph_clk_attach(device_t dev)
   60 {
   61         struct a37x0_periph_clknode_def *dev_defs;
   62         struct a37x0_periph_clk_softc *sc;
   63         const char *tbg_clocks[5];
   64         const char *xtal_clock;
   65         phandle_t node;
   66         int error, i;
   67         clk_t clock;
   68 
   69         sc = device_get_softc(dev);
   70         node = ofw_bus_get_node(dev);
   71         sc->dev = dev;
   72 
   73         mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
   74 
   75         if (bus_alloc_resources(dev, a37x0_periph_clk_spec, &sc->res) != 0) {
   76                 device_printf(dev, "Cannot allocate resources\n");
   77                 return (ENXIO);
   78         }
   79 
   80         sc->clkdom = clkdom_create(dev);
   81         if (sc->clkdom == NULL) {
   82                 device_printf(dev, "Cannot create clock domain\n");
   83                 return (ENXIO);
   84         }
   85 
   86         for (i = 0; i < TBG_COUNT; i++){
   87                 error = clk_get_by_ofw_index(dev, node, i, &clock);
   88                 if (error)
   89                         goto fail;
   90                 tbg_clocks[i] = clk_get_name(clock);
   91         }
   92 
   93         error = clk_get_by_ofw_index(dev, node, XTAL_OFW_INDEX, &clock);
   94         if (error)
   95                 goto fail;
   96         xtal_clock = clk_get_name(clock);
   97 
   98         dev_defs = sc->devices;
   99 
  100         for (i = 0; i< sc->device_count; i++) {
  101                 dev_defs[i].common_def.tbgs = tbg_clocks;
  102                 dev_defs[i].common_def.xtal = xtal_clock;
  103                 dev_defs[i].common_def.tbg_cnt = TBG_COUNT;
  104                 switch (dev_defs[i].type) {
  105                 case CLK_FULL_DD:
  106                         error = a37x0_periph_d_register_full_clk_dd(
  107                             sc->clkdom, &dev_defs[i]);
  108                         if (error)
  109                                 goto fail;
  110                         break;
  111 
  112                 case CLK_FULL:
  113                         error = a37x0_periph_d_register_full_clk(
  114                             sc->clkdom, &dev_defs[i]);
  115                         if (error)
  116                                 goto fail;
  117                         break;
  118 
  119                 case CLK_GATE:
  120                         error = a37x0_periph_gate_register_gate(
  121                             sc->clkdom, &dev_defs[i]);
  122                         if (error)
  123                                 goto fail;
  124                         break;
  125 
  126                 case CLK_MUX_GATE:
  127                         error = a37x0_periph_register_mux_gate(
  128                            sc->clkdom, &dev_defs[i]);
  129                         if (error)
  130                                 goto fail;
  131                         break;
  132 
  133                 case CLK_FIXED:
  134                         error = a37x0_periph_fixed_register_fixed(
  135                            sc->clkdom, &dev_defs[i]);
  136                         if (error)
  137                                 goto fail;
  138                         break;
  139 
  140                 case CLK_CPU:
  141                         error = a37x0_periph_d_register_periph_cpu(
  142                            sc->clkdom, &dev_defs[i]);
  143                         if (error)
  144                                 goto fail;
  145                         break;
  146 
  147                 case CLK_MDD:
  148                         error = a37x0_periph_d_register_mdd(
  149                             sc->clkdom, &dev_defs[i]);
  150                         if (error)
  151                                 goto fail;
  152                         break;
  153 
  154                 case CLK_MUX_GATE_FIXED:
  155                         error = a37x0_periph_register_mux_gate_fixed(
  156                             sc->clkdom, &dev_defs[i]);
  157                         if (error)
  158                                 goto fail;
  159                         break;
  160 
  161                 default:
  162                         return (ENXIO);
  163                 }
  164         }
  165 
  166         error = clkdom_finit(sc->clkdom);
  167         if (error)
  168                 goto fail;
  169 
  170         if (bootverbose)
  171                 clkdom_dump(sc->clkdom);
  172 
  173         return (0);
  174 
  175 fail:
  176         bus_release_resources(dev, a37x0_periph_clk_spec, &sc->res);
  177 
  178         return (error);
  179 
  180 }
  181 
  182 int
  183 a37x0_periph_clk_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
  184 {
  185         struct a37x0_periph_clk_softc *sc;
  186 
  187         sc = device_get_softc(dev);
  188         *val = bus_read_4(sc->res, addr);
  189 
  190         return (0);
  191 }
  192 
  193 void
  194 a37x0_periph_clk_device_lock(device_t dev)
  195 {
  196         struct a37x0_periph_clk_softc *sc;
  197 
  198         sc = device_get_softc(dev);
  199         mtx_lock(&sc->mtx);
  200 }
  201 
  202 void
  203 a37x0_periph_clk_device_unlock(device_t dev)
  204 {
  205         struct a37x0_periph_clk_softc *sc;
  206 
  207         sc = device_get_softc(dev);
  208         mtx_unlock(&sc->mtx);
  209 }
  210 
  211 int
  212 a37x0_periph_clk_detach(device_t dev)
  213 {
  214 
  215         return (EBUSY);
  216 }

Cache object: faebe16a81d04df7ea1cef9241f315ef

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FreeBSD/Linux Kernel Cross Reference sys/arm/mv/clk/a37x0_periph_clk_driver.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/mv/clk/a37x0_periph_clk_driver.c