discovery.c

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    1 /*-
    2  * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
    3  * All rights reserved.
    4  *
    5  * Developed by Semihalf.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of MARVELL nor the names of contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 
   39 #include <machine/bus.h>
   40 #include <machine/fdt.h>
   41 
   42 #include <arm/mv/mvreg.h>
   43 #include <arm/mv/mvvar.h>
   44 #include <arm/mv/mvwin.h>
   45 
   46 struct resource_spec mv_gpio_res[] = {
   47         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   48         { SYS_RES_IRQ,          0,      RF_ACTIVE },
   49         { SYS_RES_IRQ,          1,      RF_ACTIVE },
   50         { SYS_RES_IRQ,          2,      RF_ACTIVE },
   51         { SYS_RES_IRQ,          3,      RF_ACTIVE },
   52         { -1, 0 }
   53 };
   54 
   55 const struct decode_win idma_win_tbl[] = {
   56         { 0 },
   57 };
   58 const struct decode_win *idma_wins = idma_win_tbl;
   59 int idma_wins_no = 0;
   60 
   61 const struct decode_win xor_win_tbl[] = {
   62         { 0 },
   63 };
   64 const struct decode_win *xor_wins = xor_win_tbl;
   65 int xor_wins_no = 0;
   66 
   67 uint32_t
   68 get_tclk(void)
   69 {
   70         uint32_t sar;
   71 
   72         /*
   73          * On Discovery TCLK is can be configured to 166 MHz or 200 MHz.
   74          * Current setting is read from Sample At Reset register.
   75          */
   76         sar = bus_space_read_4(fdtbus_bs_tag, MV_MPP_BASE, SAMPLE_AT_RESET_HI);
   77         sar = (sar & TCLK_MASK) >> TCLK_SHIFT;
   78 
   79         switch (sar) {
   80         case 0:
   81                 return (TCLK_166MHZ);
   82         case 1:
   83                 return (TCLK_200MHZ);
   84         default:
   85                 panic("Unknown TCLK settings!");
   86         }
   87 }

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FreeBSD/Linux Kernel Cross Reference sys/arm/mv/discovery/discovery.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/mv/discovery/discovery.c