r92c_llt.c

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    1 /*      $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
    5  * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
    6  * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
    7  *
    8  * Permission to use, copy, modify, and distribute this software for any
    9  * purpose with or without fee is hereby granted, provided that the above
   10  * copyright notice and this permission notice appear in all copies.
   11  *
   12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   19  */
   20 
   21 #include <sys/cdefs.h>
   22 __FBSDID("$FreeBSD$");
   23 
   24 #include "opt_wlan.h"
   25 
   26 #include <sys/param.h>
   27 #include <sys/lock.h>
   28 #include <sys/mutex.h>
   29 #include <sys/mbuf.h>
   30 #include <sys/kernel.h>
   31 #include <sys/socket.h>
   32 #include <sys/systm.h>
   33 #include <sys/malloc.h>
   34 #include <sys/queue.h>
   35 #include <sys/taskqueue.h>
   36 #include <sys/bus.h>
   37 #include <sys/endian.h>
   38 #include <sys/linker.h>
   39 
   40 #include <net/if.h>
   41 #include <net/ethernet.h>
   42 #include <net/if_media.h>
   43 
   44 #include <net80211/ieee80211_var.h>
   45 #include <net80211/ieee80211_radiotap.h>
   46 
   47 #include <dev/rtwn/if_rtwnreg.h>
   48 #include <dev/rtwn/if_rtwnvar.h>
   49 
   50 #include <dev/rtwn/rtl8192c/r92c.h>
   51 #include <dev/rtwn/rtl8192c/r92c_reg.h>
   52 #include <dev/rtwn/rtl8192c/r92c_var.h>
   53 
   54 int
   55 r92c_llt_write(struct rtwn_softc *sc, uint32_t addr, uint32_t data)
   56 {
   57         int ntries, error;
   58 
   59         error = rtwn_write_4(sc, R92C_LLT_INIT,
   60             SM(R92C_LLT_INIT_OP, R92C_LLT_INIT_OP_WRITE) |
   61             SM(R92C_LLT_INIT_ADDR, addr) |
   62             SM(R92C_LLT_INIT_DATA, data));
   63         if (error != 0)
   64                 return (error);
   65         /* Wait for write operation to complete. */
   66         for (ntries = 0; ntries < 20; ntries++) {
   67                 if (MS(rtwn_read_4(sc, R92C_LLT_INIT), R92C_LLT_INIT_OP) ==
   68                     R92C_LLT_INIT_OP_NO_ACTIVE)
   69                         return (0);
   70                 rtwn_delay(sc, 10);
   71         }
   72         return (ETIMEDOUT);
   73 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/rtl8192c/r92c_llt.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/rtl8192c/r92c_llt.c