if_rtwn_fw.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 #include <sys/firmware.h>
   40 
   41 #include <net/if.h>
   42 #include <net/ethernet.h>
   43 #include <net/if_media.h>
   44 
   45 #include <net80211/ieee80211_var.h>
   46 #include <net80211/ieee80211_radiotap.h>
   47 
   48 #include <dev/rtwn/if_rtwnreg.h>
   49 #include <dev/rtwn/if_rtwnvar.h>
   50 
   51 #include <dev/rtwn/if_rtwn_debug.h>
   52 #include <dev/rtwn/if_rtwn_fw.h>
   53 
   54 #include <dev/rtwn/rtl8192c/r92c_reg.h>
   55 
   56 #ifndef RTWN_WITHOUT_UCODE
   57 static int
   58 rtwn_fw_loadpage(struct rtwn_softc *sc, int page, const uint8_t *buf,
   59     int len)
   60 {
   61         uint32_t reg;
   62         uint16_t off;
   63         int mlen, error;
   64 
   65         reg = rtwn_read_4(sc, R92C_MCUFWDL);
   66         reg = RW(reg, R92C_MCUFWDL_PAGE, page);
   67         rtwn_write_4(sc, R92C_MCUFWDL, reg);
   68 
   69         error = 0;
   70         off = R92C_FW_START_ADDR;
   71         while (len > 0) {
   72                 if (len > R92C_FW_MAX_BLOCK_SIZE)
   73                         mlen = R92C_FW_MAX_BLOCK_SIZE;
   74                 else if (len > 4)
   75                         mlen = 4;
   76                 else
   77                         mlen = 1;
   78                 error = rtwn_fw_write_block(sc, buf, off, mlen);
   79                 if (error != 0)
   80                         break;
   81                 off += mlen;
   82                 buf += mlen;
   83                 len -= mlen;
   84         }
   85 
   86         if (error != 0) {
   87                 RTWN_DPRINTF(sc, RTWN_DEBUG_FIRMWARE,
   88                     "%s: could not load firmware page %d (offset %u)\n",
   89                     __func__, page, off);
   90         }
   91 
   92         return (error);
   93 }
   94 
   95 static int
   96 rtwn_fw_checksum_report(struct rtwn_softc *sc)
   97 {
   98         int ntries;
   99 
  100         for (ntries = 0; ntries < 25; ntries++) {
  101                 if (rtwn_read_4(sc, R92C_MCUFWDL) & R92C_MCUFWDL_CHKSUM_RPT)
  102                         break;
  103                 rtwn_delay(sc, 10000);
  104         }
  105         if (ntries == 25) {
  106                 RTWN_DPRINTF(sc, RTWN_DEBUG_FIRMWARE,
  107                     "timeout waiting for checksum report\n");
  108                 return (ETIMEDOUT);
  109         }
  110 
  111         return (0);
  112 }
  113 
  114 int
  115 rtwn_load_firmware(struct rtwn_softc *sc)
  116 {
  117         const struct firmware *fw;
  118         const struct r92c_fw_hdr *hdr;
  119         const u_char *ptr;
  120         size_t len;
  121         int ntries, error;
  122 
  123         /* Read firmware image from the filesystem. */
  124         RTWN_UNLOCK(sc);
  125         fw = firmware_get(sc->fwname);
  126         RTWN_LOCK(sc);
  127         if (fw == NULL) {
  128                 device_printf(sc->sc_dev,
  129                     "failed loadfirmware of file %s\n", sc->fwname);
  130                 return (ENOENT);
  131         }
  132 
  133         len = fw->datasize;
  134         if (len < sizeof(*hdr) || len > sc->fwsize_limit) {
  135                 device_printf(sc->sc_dev, "wrong firmware size (%zu)\n", len);
  136                 error = EINVAL;
  137                 goto fail;
  138         }
  139         ptr = fw->data;
  140         hdr = (const struct r92c_fw_hdr *)ptr;
  141         /* Check if there is a valid FW header and skip it. */
  142         if ((le16toh(hdr->signature) >> 4) == sc->fwsig) {
  143                 sc->fwver = le16toh(hdr->version);
  144 
  145                 RTWN_DPRINTF(sc, RTWN_DEBUG_FIRMWARE,
  146                     "FW V%u.%u %02u-%02u %02u:%02u\n",
  147                     le16toh(hdr->version), le16toh(hdr->subversion),
  148                     hdr->month, hdr->date, hdr->hour, hdr->minute);
  149                 ptr += sizeof(*hdr);
  150                 len -= sizeof(*hdr);
  151         }
  152 
  153         if (rtwn_read_1(sc, R92C_MCUFWDL) & R92C_MCUFWDL_RAM_DL_SEL) {
  154                 rtwn_write_1(sc, R92C_MCUFWDL, 0);
  155                 rtwn_fw_reset(sc, RTWN_FW_RESET_DOWNLOAD);
  156         }
  157 
  158         /* Enable firmware download. */
  159         rtwn_fw_download_enable(sc, 1);
  160 
  161         error = 0;      /* compiler warning */
  162         for (ntries = 0; ntries < 3; ntries++) {
  163                 const u_char *curr_ptr = ptr;
  164                 const int maxpages = len / R92C_FW_PAGE_SIZE;
  165                 int page;
  166 
  167                 /* Reset the FWDL checksum. */
  168                 rtwn_setbits_1(sc, R92C_MCUFWDL, 0, R92C_MCUFWDL_CHKSUM_RPT);
  169 
  170                 for (page = 0; page < maxpages; page++) {
  171                         error = rtwn_fw_loadpage(sc, page, curr_ptr,
  172                             R92C_FW_PAGE_SIZE);
  173                         if (error != 0)
  174                                 break;
  175                         curr_ptr += R92C_FW_PAGE_SIZE;
  176                 }
  177                 if (page != maxpages)
  178                         continue;
  179 
  180                 if (len % R92C_FW_PAGE_SIZE != 0) {
  181                         error = rtwn_fw_loadpage(sc, page, curr_ptr,
  182                             len % R92C_FW_PAGE_SIZE);
  183                         if (error != 0)
  184                                 continue;
  185                 }
  186 
  187                 /* Wait for checksum report. */
  188                 error = rtwn_fw_checksum_report(sc);
  189                 if (error == 0)
  190                         break;
  191         }
  192         if (ntries == 3) {
  193                 device_printf(sc->sc_dev,
  194                     "%s: failed to upload firmware %s (error %d)\n",
  195                     __func__, sc->fwname, error);
  196                 goto fail;
  197         }
  198 
  199         /* Disable firmware download. */
  200         rtwn_fw_download_enable(sc, 0);
  201 
  202         rtwn_setbits_4(sc, R92C_MCUFWDL, R92C_MCUFWDL_WINTINI_RDY,
  203             R92C_MCUFWDL_RDY);
  204 
  205         rtwn_fw_reset(sc, RTWN_FW_RESET_CHECKSUM);
  206 
  207         /* Wait for firmware readiness. */
  208         for (ntries = 0; ntries < 20; ntries++) {
  209                 if (rtwn_read_4(sc, R92C_MCUFWDL) & R92C_MCUFWDL_WINTINI_RDY)
  210                         break;
  211                 rtwn_delay(sc, 10000);
  212         }
  213         if (ntries == 20) {
  214                 device_printf(sc->sc_dev,
  215                     "timeout waiting for firmware readiness\n");
  216                 error = ETIMEDOUT;
  217                 goto fail;
  218         }
  219 fail:
  220         firmware_put(fw, FIRMWARE_UNLOAD);
  221         return (error);
  222 }
  223 #endif

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/if_rtwn_fw.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/if_rtwn_fw.c