root/drivers/firmware/broadcom/bcm47xx_sprom.c

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DEFINITIONS

This source file includes following definitions.
  1. create_key
  2. get_nvram_var
  3. NVRAM_READ_VAL
  4. nvram_read_leddc
  5. nvram_read_macaddr
  6. nvram_read_alpha2
  7. bcm47xx_sprom_fill_auto
  8. bcm47xx_fill_sprom_path_r4589
  9. bcm47xx_fill_sprom_path_r45
  10. bcm47xx_is_valid_mac
  11. bcm47xx_increase_mac_addr
  12. bcm47xx_fill_sprom_ethernet
  13. bcm47xx_fill_board_data
  14. bcm47xx_fill_sprom
  15. bcm47xx_get_sprom_ssb
  16. bcm47xx_sprom_apply_prefix_alias
  17. bcm47xx_get_sprom_bcma
  18. bcm47xx_sprom_register_fallbacks

   1 /*
   2  *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
   3  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
   4  *  Copyright (C) 2006 Michael Buesch <m@bues.ch>
   5  *  Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
   6  *  Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28 
  29 #include <linux/bcm47xx_nvram.h>
  30 #include <linux/bcma/bcma.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/ssb/ssb.h>
  34 
  35 static void create_key(const char *prefix, const char *postfix,
  36                        const char *name, char *buf, int len)
  37 {
  38         if (prefix && postfix)
  39                 snprintf(buf, len, "%s%s%s", prefix, name, postfix);
  40         else if (prefix)
  41                 snprintf(buf, len, "%s%s", prefix, name);
  42         else if (postfix)
  43                 snprintf(buf, len, "%s%s", name, postfix);
  44         else
  45                 snprintf(buf, len, "%s", name);
  46 }
  47 
  48 static int get_nvram_var(const char *prefix, const char *postfix,
  49                          const char *name, char *buf, int len, bool fallback)
  50 {
  51         char key[40];
  52         int err;
  53 
  54         create_key(prefix, postfix, name, key, sizeof(key));
  55 
  56         err = bcm47xx_nvram_getenv(key, buf, len);
  57         if (fallback && err == -ENOENT && prefix) {
  58                 create_key(NULL, postfix, name, key, sizeof(key));
  59                 err = bcm47xx_nvram_getenv(key, buf, len);
  60         }
  61         return err;
  62 }
  63 
  64 #define NVRAM_READ_VAL(type)                                            \
  65 static void nvram_read_ ## type(const char *prefix,                     \
  66                                 const char *postfix, const char *name,  \
  67                                 type *val, type allset, bool fallback)  \
  68 {                                                                       \
  69         char buf[100];                                                  \
  70         int err;                                                        \
  71         type var;                                                       \
  72                                                                         \
  73         err = get_nvram_var(prefix, postfix, name, buf, sizeof(buf),    \
  74                             fallback);                                  \
  75         if (err < 0)                                                    \
  76                 return;                                                 \
  77         err = kstrto ## type(strim(buf), 0, &var);                      \
  78         if (err) {                                                      \
  79                 pr_warn("can not parse nvram name %s%s%s with value %s got %i\n",       \
  80                         prefix, name, postfix, buf, err);               \
  81                 return;                                                 \
  82         }                                                               \
  83         if (allset && var == allset)                                    \
  84                 return;                                                 \
  85         *val = var;                                                     \
  86 }
  87 
  88 NVRAM_READ_VAL(u8)
  89 NVRAM_READ_VAL(s8)
  90 NVRAM_READ_VAL(u16)
  91 NVRAM_READ_VAL(u32)
  92 
  93 #undef NVRAM_READ_VAL
  94 
  95 static void nvram_read_u32_2(const char *prefix, const char *name,
  96                              u16 *val_lo, u16 *val_hi, bool fallback)
  97 {
  98         char buf[100];
  99         int err;
 100         u32 val;
 101 
 102         err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
 103         if (err < 0)
 104                 return;
 105         err = kstrtou32(strim(buf), 0, &val);
 106         if (err) {
 107                 pr_warn("can not parse nvram name %s%s with value %s got %i\n",
 108                         prefix, name, buf, err);
 109                 return;
 110         }
 111         *val_lo = (val & 0x0000FFFFU);
 112         *val_hi = (val & 0xFFFF0000U) >> 16;
 113 }
 114 
 115 static void nvram_read_leddc(const char *prefix, const char *name,
 116                              u8 *leddc_on_time, u8 *leddc_off_time,
 117                              bool fallback)
 118 {
 119         char buf[100];
 120         int err;
 121         u32 val;
 122 
 123         err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
 124         if (err < 0)
 125                 return;
 126         err = kstrtou32(strim(buf), 0, &val);
 127         if (err) {
 128                 pr_warn("can not parse nvram name %s%s with value %s got %i\n",
 129                         prefix, name, buf, err);
 130                 return;
 131         }
 132 
 133         if (val == 0xffff || val == 0xffffffff)
 134                 return;
 135 
 136         *leddc_on_time = val & 0xff;
 137         *leddc_off_time = (val >> 16) & 0xff;
 138 }
 139 
 140 static void nvram_read_macaddr(const char *prefix, const char *name,
 141                                u8 val[6], bool fallback)
 142 {
 143         char buf[100];
 144         int err;
 145 
 146         err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
 147         if (err < 0)
 148                 return;
 149 
 150         strreplace(buf, '-', ':');
 151         if (!mac_pton(buf, val))
 152                 pr_warn("Can not parse mac address: %s\n", buf);
 153 }
 154 
 155 static void nvram_read_alpha2(const char *prefix, const char *name,
 156                              char val[2], bool fallback)
 157 {
 158         char buf[10];
 159         int err;
 160 
 161         err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
 162         if (err < 0)
 163                 return;
 164         if (buf[0] == '0')
 165                 return;
 166         if (strlen(buf) > 2) {
 167                 pr_warn("alpha2 is too long %s\n", buf);
 168                 return;
 169         }
 170         memcpy(val, buf, 2);
 171 }
 172 
 173 /* This is one-function-only macro, it uses local "sprom" variable! */
 174 #define ENTRY(_revmask, _type, _prefix, _name, _val, _allset, _fallback) \
 175         if (_revmask & BIT(sprom->revision)) \
 176                 nvram_read_ ## _type(_prefix, NULL, _name, &sprom->_val, \
 177                                      _allset, _fallback)
 178 /*
 179  * Special version of filling function that can be safely called for any SPROM
 180  * revision. For every NVRAM to SPROM mapping it contains bitmask of revisions
 181  * for which the mapping is valid.
 182  * It obviously requires some hexadecimal/bitmasks knowledge, but allows
 183  * writing cleaner code (easy revisions handling).
 184  * Note that while SPROM revision 0 was never used, we still keep BIT(0)
 185  * reserved for it, just to keep numbering sane.
 186  */
 187 static void bcm47xx_sprom_fill_auto(struct ssb_sprom *sprom,
 188                                     const char *prefix, bool fallback)
 189 {
 190         const char *pre = prefix;
 191         bool fb = fallback;
 192 
 193         /* Broadcom extracts it for rev 8+ but it was found on 2 and 4 too */
 194         ENTRY(0xfffffffe, u16, pre, "devid", dev_id, 0, fallback);
 195 
 196         ENTRY(0xfffffffe, u16, pre, "boardrev", board_rev, 0, true);
 197         ENTRY(0xfffffffe, u32, pre, "boardflags", boardflags, 0, fb);
 198         ENTRY(0xfffffff0, u32, pre, "boardflags2", boardflags2, 0, fb);
 199         ENTRY(0xfffff800, u32, pre, "boardflags3", boardflags3, 0, fb);
 200         ENTRY(0x00000002, u16, pre, "boardflags", boardflags_lo, 0, fb);
 201         ENTRY(0xfffffffc, u16, pre, "boardtype", board_type, 0, true);
 202         ENTRY(0xfffffffe, u16, pre, "boardnum", board_num, 0, fb);
 203         ENTRY(0x00000002, u8, pre, "cc", country_code, 0, fb);
 204         ENTRY(0xfffffff8, u8, pre, "regrev", regrev, 0, fb);
 205 
 206         ENTRY(0xfffffffe, u8, pre, "ledbh0", gpio0, 0xff, fb);
 207         ENTRY(0xfffffffe, u8, pre, "ledbh1", gpio1, 0xff, fb);
 208         ENTRY(0xfffffffe, u8, pre, "ledbh2", gpio2, 0xff, fb);
 209         ENTRY(0xfffffffe, u8, pre, "ledbh3", gpio3, 0xff, fb);
 210 
 211         ENTRY(0x0000070e, u16, pre, "pa0b0", pa0b0, 0, fb);
 212         ENTRY(0x0000070e, u16, pre, "pa0b1", pa0b1, 0, fb);
 213         ENTRY(0x0000070e, u16, pre, "pa0b2", pa0b2, 0, fb);
 214         ENTRY(0x0000070e, u8, pre, "pa0itssit", itssi_bg, 0, fb);
 215         ENTRY(0x0000070e, u8, pre, "pa0maxpwr", maxpwr_bg, 0, fb);
 216 
 217         ENTRY(0x0000070c, u8, pre, "opo", opo, 0, fb);
 218         ENTRY(0xfffffffe, u8, pre, "aa2g", ant_available_bg, 0, fb);
 219         ENTRY(0xfffffffe, u8, pre, "aa5g", ant_available_a, 0, fb);
 220         ENTRY(0x000007fe, s8, pre, "ag0", antenna_gain.a0, 0, fb);
 221         ENTRY(0x000007fe, s8, pre, "ag1", antenna_gain.a1, 0, fb);
 222         ENTRY(0x000007f0, s8, pre, "ag2", antenna_gain.a2, 0, fb);
 223         ENTRY(0x000007f0, s8, pre, "ag3", antenna_gain.a3, 0, fb);
 224 
 225         ENTRY(0x0000070e, u16, pre, "pa1b0", pa1b0, 0, fb);
 226         ENTRY(0x0000070e, u16, pre, "pa1b1", pa1b1, 0, fb);
 227         ENTRY(0x0000070e, u16, pre, "pa1b2", pa1b2, 0, fb);
 228         ENTRY(0x0000070c, u16, pre, "pa1lob0", pa1lob0, 0, fb);
 229         ENTRY(0x0000070c, u16, pre, "pa1lob1", pa1lob1, 0, fb);
 230         ENTRY(0x0000070c, u16, pre, "pa1lob2", pa1lob2, 0, fb);
 231         ENTRY(0x0000070c, u16, pre, "pa1hib0", pa1hib0, 0, fb);
 232         ENTRY(0x0000070c, u16, pre, "pa1hib1", pa1hib1, 0, fb);
 233         ENTRY(0x0000070c, u16, pre, "pa1hib2", pa1hib2, 0, fb);
 234         ENTRY(0x0000070e, u8, pre, "pa1itssit", itssi_a, 0, fb);
 235         ENTRY(0x0000070e, u8, pre, "pa1maxpwr", maxpwr_a, 0, fb);
 236         ENTRY(0x0000070c, u8, pre, "pa1lomaxpwr", maxpwr_al, 0, fb);
 237         ENTRY(0x0000070c, u8, pre, "pa1himaxpwr", maxpwr_ah, 0, fb);
 238 
 239         ENTRY(0x00000708, u8, pre, "bxa2g", bxa2g, 0, fb);
 240         ENTRY(0x00000708, u8, pre, "rssisav2g", rssisav2g, 0, fb);
 241         ENTRY(0x00000708, u8, pre, "rssismc2g", rssismc2g, 0, fb);
 242         ENTRY(0x00000708, u8, pre, "rssismf2g", rssismf2g, 0, fb);
 243         ENTRY(0x00000708, u8, pre, "bxa5g", bxa5g, 0, fb);
 244         ENTRY(0x00000708, u8, pre, "rssisav5g", rssisav5g, 0, fb);
 245         ENTRY(0x00000708, u8, pre, "rssismc5g", rssismc5g, 0, fb);
 246         ENTRY(0x00000708, u8, pre, "rssismf5g", rssismf5g, 0, fb);
 247         ENTRY(0x00000708, u8, pre, "tri2g", tri2g, 0, fb);
 248         ENTRY(0x00000708, u8, pre, "tri5g", tri5g, 0, fb);
 249         ENTRY(0x00000708, u8, pre, "tri5gl", tri5gl, 0, fb);
 250         ENTRY(0x00000708, u8, pre, "tri5gh", tri5gh, 0, fb);
 251         ENTRY(0x00000708, s8, pre, "rxpo2g", rxpo2g, 0, fb);
 252         ENTRY(0x00000708, s8, pre, "rxpo5g", rxpo5g, 0, fb);
 253         ENTRY(0xfffffff0, u8, pre, "txchain", txchain, 0xf, fb);
 254         ENTRY(0xfffffff0, u8, pre, "rxchain", rxchain, 0xf, fb);
 255         ENTRY(0xfffffff0, u8, pre, "antswitch", antswitch, 0xff, fb);
 256         ENTRY(0x00000700, u8, pre, "tssipos2g", fem.ghz2.tssipos, 0, fb);
 257         ENTRY(0x00000700, u8, pre, "extpagain2g", fem.ghz2.extpa_gain, 0, fb);
 258         ENTRY(0x00000700, u8, pre, "pdetrange2g", fem.ghz2.pdet_range, 0, fb);
 259         ENTRY(0x00000700, u8, pre, "triso2g", fem.ghz2.tr_iso, 0, fb);
 260         ENTRY(0x00000700, u8, pre, "antswctl2g", fem.ghz2.antswlut, 0, fb);
 261         ENTRY(0x00000700, u8, pre, "tssipos5g", fem.ghz5.tssipos, 0, fb);
 262         ENTRY(0x00000700, u8, pre, "extpagain5g", fem.ghz5.extpa_gain, 0, fb);
 263         ENTRY(0x00000700, u8, pre, "pdetrange5g", fem.ghz5.pdet_range, 0, fb);
 264         ENTRY(0x00000700, u8, pre, "triso5g", fem.ghz5.tr_iso, 0, fb);
 265         ENTRY(0x00000700, u8, pre, "antswctl5g", fem.ghz5.antswlut, 0, fb);
 266         ENTRY(0x000000f0, u8, pre, "txpid2ga0", txpid2g[0], 0, fb);
 267         ENTRY(0x000000f0, u8, pre, "txpid2ga1", txpid2g[1], 0, fb);
 268         ENTRY(0x000000f0, u8, pre, "txpid2ga2", txpid2g[2], 0, fb);
 269         ENTRY(0x000000f0, u8, pre, "txpid2ga3", txpid2g[3], 0, fb);
 270         ENTRY(0x000000f0, u8, pre, "txpid5ga0", txpid5g[0], 0, fb);
 271         ENTRY(0x000000f0, u8, pre, "txpid5ga1", txpid5g[1], 0, fb);
 272         ENTRY(0x000000f0, u8, pre, "txpid5ga2", txpid5g[2], 0, fb);
 273         ENTRY(0x000000f0, u8, pre, "txpid5ga3", txpid5g[3], 0, fb);
 274         ENTRY(0x000000f0, u8, pre, "txpid5gla0", txpid5gl[0], 0, fb);
 275         ENTRY(0x000000f0, u8, pre, "txpid5gla1", txpid5gl[1], 0, fb);
 276         ENTRY(0x000000f0, u8, pre, "txpid5gla2", txpid5gl[2], 0, fb);
 277         ENTRY(0x000000f0, u8, pre, "txpid5gla3", txpid5gl[3], 0, fb);
 278         ENTRY(0x000000f0, u8, pre, "txpid5gha0", txpid5gh[0], 0, fb);
 279         ENTRY(0x000000f0, u8, pre, "txpid5gha1", txpid5gh[1], 0, fb);
 280         ENTRY(0x000000f0, u8, pre, "txpid5gha2", txpid5gh[2], 0, fb);
 281         ENTRY(0x000000f0, u8, pre, "txpid5gha3", txpid5gh[3], 0, fb);
 282 
 283         ENTRY(0xffffff00, u8, pre, "tempthresh", tempthresh, 0, fb);
 284         ENTRY(0xffffff00, u8, pre, "tempoffset", tempoffset, 0, fb);
 285         ENTRY(0xffffff00, u16, pre, "rawtempsense", rawtempsense, 0, fb);
 286         ENTRY(0xffffff00, u8, pre, "measpower", measpower, 0, fb);
 287         ENTRY(0xffffff00, u8, pre, "tempsense_slope", tempsense_slope, 0, fb);
 288         ENTRY(0xffffff00, u8, pre, "tempcorrx", tempcorrx, 0, fb);
 289         ENTRY(0xffffff00, u8, pre, "tempsense_option", tempsense_option, 0, fb);
 290         ENTRY(0x00000700, u8, pre, "freqoffset_corr", freqoffset_corr, 0, fb);
 291         ENTRY(0x00000700, u8, pre, "iqcal_swp_dis", iqcal_swp_dis, 0, fb);
 292         ENTRY(0x00000700, u8, pre, "hw_iqcal_en", hw_iqcal_en, 0, fb);
 293         ENTRY(0x00000700, u8, pre, "elna2g", elna2g, 0, fb);
 294         ENTRY(0x00000700, u8, pre, "elna5g", elna5g, 0, fb);
 295         ENTRY(0xffffff00, u8, pre, "phycal_tempdelta", phycal_tempdelta, 0, fb);
 296         ENTRY(0xffffff00, u8, pre, "temps_period", temps_period, 0, fb);
 297         ENTRY(0xffffff00, u8, pre, "temps_hysteresis", temps_hysteresis, 0, fb);
 298         ENTRY(0xffffff00, u8, pre, "measpower1", measpower1, 0, fb);
 299         ENTRY(0xffffff00, u8, pre, "measpower2", measpower2, 0, fb);
 300 
 301         ENTRY(0x000001f0, u16, pre, "cck2gpo", cck2gpo, 0, fb);
 302         ENTRY(0x000001f0, u32, pre, "ofdm2gpo", ofdm2gpo, 0, fb);
 303         ENTRY(0x000001f0, u32, pre, "ofdm5gpo", ofdm5gpo, 0, fb);
 304         ENTRY(0x000001f0, u32, pre, "ofdm5glpo", ofdm5glpo, 0, fb);
 305         ENTRY(0x000001f0, u32, pre, "ofdm5ghpo", ofdm5ghpo, 0, fb);
 306         ENTRY(0x000001f0, u16, pre, "mcs2gpo0", mcs2gpo[0], 0, fb);
 307         ENTRY(0x000001f0, u16, pre, "mcs2gpo1", mcs2gpo[1], 0, fb);
 308         ENTRY(0x000001f0, u16, pre, "mcs2gpo2", mcs2gpo[2], 0, fb);
 309         ENTRY(0x000001f0, u16, pre, "mcs2gpo3", mcs2gpo[3], 0, fb);
 310         ENTRY(0x000001f0, u16, pre, "mcs2gpo4", mcs2gpo[4], 0, fb);
 311         ENTRY(0x000001f0, u16, pre, "mcs2gpo5", mcs2gpo[5], 0, fb);
 312         ENTRY(0x000001f0, u16, pre, "mcs2gpo6", mcs2gpo[6], 0, fb);
 313         ENTRY(0x000001f0, u16, pre, "mcs2gpo7", mcs2gpo[7], 0, fb);
 314         ENTRY(0x000001f0, u16, pre, "mcs5gpo0", mcs5gpo[0], 0, fb);
 315         ENTRY(0x000001f0, u16, pre, "mcs5gpo1", mcs5gpo[1], 0, fb);
 316         ENTRY(0x000001f0, u16, pre, "mcs5gpo2", mcs5gpo[2], 0, fb);
 317         ENTRY(0x000001f0, u16, pre, "mcs5gpo3", mcs5gpo[3], 0, fb);
 318         ENTRY(0x000001f0, u16, pre, "mcs5gpo4", mcs5gpo[4], 0, fb);
 319         ENTRY(0x000001f0, u16, pre, "mcs5gpo5", mcs5gpo[5], 0, fb);
 320         ENTRY(0x000001f0, u16, pre, "mcs5gpo6", mcs5gpo[6], 0, fb);
 321         ENTRY(0x000001f0, u16, pre, "mcs5gpo7", mcs5gpo[7], 0, fb);
 322         ENTRY(0x000001f0, u16, pre, "mcs5glpo0", mcs5glpo[0], 0, fb);
 323         ENTRY(0x000001f0, u16, pre, "mcs5glpo1", mcs5glpo[1], 0, fb);
 324         ENTRY(0x000001f0, u16, pre, "mcs5glpo2", mcs5glpo[2], 0, fb);
 325         ENTRY(0x000001f0, u16, pre, "mcs5glpo3", mcs5glpo[3], 0, fb);
 326         ENTRY(0x000001f0, u16, pre, "mcs5glpo4", mcs5glpo[4], 0, fb);
 327         ENTRY(0x000001f0, u16, pre, "mcs5glpo5", mcs5glpo[5], 0, fb);
 328         ENTRY(0x000001f0, u16, pre, "mcs5glpo6", mcs5glpo[6], 0, fb);
 329         ENTRY(0x000001f0, u16, pre, "mcs5glpo7", mcs5glpo[7], 0, fb);
 330         ENTRY(0x000001f0, u16, pre, "mcs5ghpo0", mcs5ghpo[0], 0, fb);
 331         ENTRY(0x000001f0, u16, pre, "mcs5ghpo1", mcs5ghpo[1], 0, fb);
 332         ENTRY(0x000001f0, u16, pre, "mcs5ghpo2", mcs5ghpo[2], 0, fb);
 333         ENTRY(0x000001f0, u16, pre, "mcs5ghpo3", mcs5ghpo[3], 0, fb);
 334         ENTRY(0x000001f0, u16, pre, "mcs5ghpo4", mcs5ghpo[4], 0, fb);
 335         ENTRY(0x000001f0, u16, pre, "mcs5ghpo5", mcs5ghpo[5], 0, fb);
 336         ENTRY(0x000001f0, u16, pre, "mcs5ghpo6", mcs5ghpo[6], 0, fb);
 337         ENTRY(0x000001f0, u16, pre, "mcs5ghpo7", mcs5ghpo[7], 0, fb);
 338         ENTRY(0x000001f0, u16, pre, "cddpo", cddpo, 0, fb);
 339         ENTRY(0x000001f0, u16, pre, "stbcpo", stbcpo, 0, fb);
 340         ENTRY(0x000001f0, u16, pre, "bw40po", bw40po, 0, fb);
 341         ENTRY(0x000001f0, u16, pre, "bwduppo", bwduppo, 0, fb);
 342 
 343         ENTRY(0xfffffe00, u16, pre, "cckbw202gpo", cckbw202gpo, 0, fb);
 344         ENTRY(0xfffffe00, u16, pre, "cckbw20ul2gpo", cckbw20ul2gpo, 0, fb);
 345         ENTRY(0x00000600, u32, pre, "legofdmbw202gpo", legofdmbw202gpo, 0, fb);
 346         ENTRY(0x00000600, u32, pre, "legofdmbw20ul2gpo", legofdmbw20ul2gpo, 0, fb);
 347         ENTRY(0x00000600, u32, pre, "legofdmbw205glpo", legofdmbw205glpo, 0, fb);
 348         ENTRY(0x00000600, u32, pre, "legofdmbw20ul5glpo", legofdmbw20ul5glpo, 0, fb);
 349         ENTRY(0x00000600, u32, pre, "legofdmbw205gmpo", legofdmbw205gmpo, 0, fb);
 350         ENTRY(0x00000600, u32, pre, "legofdmbw20ul5gmpo", legofdmbw20ul5gmpo, 0, fb);
 351         ENTRY(0x00000600, u32, pre, "legofdmbw205ghpo", legofdmbw205ghpo, 0, fb);
 352         ENTRY(0x00000600, u32, pre, "legofdmbw20ul5ghpo", legofdmbw20ul5ghpo, 0, fb);
 353         ENTRY(0xfffffe00, u32, pre, "mcsbw202gpo", mcsbw202gpo, 0, fb);
 354         ENTRY(0x00000600, u32, pre, "mcsbw20ul2gpo", mcsbw20ul2gpo, 0, fb);
 355         ENTRY(0xfffffe00, u32, pre, "mcsbw402gpo", mcsbw402gpo, 0, fb);
 356         ENTRY(0xfffffe00, u32, pre, "mcsbw205glpo", mcsbw205glpo, 0, fb);
 357         ENTRY(0x00000600, u32, pre, "mcsbw20ul5glpo", mcsbw20ul5glpo, 0, fb);
 358         ENTRY(0xfffffe00, u32, pre, "mcsbw405glpo", mcsbw405glpo, 0, fb);
 359         ENTRY(0xfffffe00, u32, pre, "mcsbw205gmpo", mcsbw205gmpo, 0, fb);
 360         ENTRY(0x00000600, u32, pre, "mcsbw20ul5gmpo", mcsbw20ul5gmpo, 0, fb);
 361         ENTRY(0xfffffe00, u32, pre, "mcsbw405gmpo", mcsbw405gmpo, 0, fb);
 362         ENTRY(0xfffffe00, u32, pre, "mcsbw205ghpo", mcsbw205ghpo, 0, fb);
 363         ENTRY(0x00000600, u32, pre, "mcsbw20ul5ghpo", mcsbw20ul5ghpo, 0, fb);
 364         ENTRY(0xfffffe00, u32, pre, "mcsbw405ghpo", mcsbw405ghpo, 0, fb);
 365         ENTRY(0x00000600, u16, pre, "mcs32po", mcs32po, 0, fb);
 366         ENTRY(0x00000600, u16, pre, "legofdm40duppo", legofdm40duppo, 0, fb);
 367         ENTRY(0x00000700, u8, pre, "pcieingress_war", pcieingress_war, 0, fb);
 368 
 369         /* TODO: rev 11 support */
 370         ENTRY(0x00000700, u8, pre, "rxgainerr2ga0", rxgainerr2ga[0], 0, fb);
 371         ENTRY(0x00000700, u8, pre, "rxgainerr2ga1", rxgainerr2ga[1], 0, fb);
 372         ENTRY(0x00000700, u8, pre, "rxgainerr2ga2", rxgainerr2ga[2], 0, fb);
 373         ENTRY(0x00000700, u8, pre, "rxgainerr5gla0", rxgainerr5gla[0], 0, fb);
 374         ENTRY(0x00000700, u8, pre, "rxgainerr5gla1", rxgainerr5gla[1], 0, fb);
 375         ENTRY(0x00000700, u8, pre, "rxgainerr5gla2", rxgainerr5gla[2], 0, fb);
 376         ENTRY(0x00000700, u8, pre, "rxgainerr5gma0", rxgainerr5gma[0], 0, fb);
 377         ENTRY(0x00000700, u8, pre, "rxgainerr5gma1", rxgainerr5gma[1], 0, fb);
 378         ENTRY(0x00000700, u8, pre, "rxgainerr5gma2", rxgainerr5gma[2], 0, fb);
 379         ENTRY(0x00000700, u8, pre, "rxgainerr5gha0", rxgainerr5gha[0], 0, fb);
 380         ENTRY(0x00000700, u8, pre, "rxgainerr5gha1", rxgainerr5gha[1], 0, fb);
 381         ENTRY(0x00000700, u8, pre, "rxgainerr5gha2", rxgainerr5gha[2], 0, fb);
 382         ENTRY(0x00000700, u8, pre, "rxgainerr5gua0", rxgainerr5gua[0], 0, fb);
 383         ENTRY(0x00000700, u8, pre, "rxgainerr5gua1", rxgainerr5gua[1], 0, fb);
 384         ENTRY(0x00000700, u8, pre, "rxgainerr5gua2", rxgainerr5gua[2], 0, fb);
 385 
 386         ENTRY(0xfffffe00, u8, pre, "sar2g", sar2g, 0, fb);
 387         ENTRY(0xfffffe00, u8, pre, "sar5g", sar5g, 0, fb);
 388 
 389         /* TODO: rev 11 support */
 390         ENTRY(0x00000700, u8, pre, "noiselvl2ga0", noiselvl2ga[0], 0, fb);
 391         ENTRY(0x00000700, u8, pre, "noiselvl2ga1", noiselvl2ga[1], 0, fb);
 392         ENTRY(0x00000700, u8, pre, "noiselvl2ga2", noiselvl2ga[2], 0, fb);
 393         ENTRY(0x00000700, u8, pre, "noiselvl5gla0", noiselvl5gla[0], 0, fb);
 394         ENTRY(0x00000700, u8, pre, "noiselvl5gla1", noiselvl5gla[1], 0, fb);
 395         ENTRY(0x00000700, u8, pre, "noiselvl5gla2", noiselvl5gla[2], 0, fb);
 396         ENTRY(0x00000700, u8, pre, "noiselvl5gma0", noiselvl5gma[0], 0, fb);
 397         ENTRY(0x00000700, u8, pre, "noiselvl5gma1", noiselvl5gma[1], 0, fb);
 398         ENTRY(0x00000700, u8, pre, "noiselvl5gma2", noiselvl5gma[2], 0, fb);
 399         ENTRY(0x00000700, u8, pre, "noiselvl5gha0", noiselvl5gha[0], 0, fb);
 400         ENTRY(0x00000700, u8, pre, "noiselvl5gha1", noiselvl5gha[1], 0, fb);
 401         ENTRY(0x00000700, u8, pre, "noiselvl5gha2", noiselvl5gha[2], 0, fb);
 402         ENTRY(0x00000700, u8, pre, "noiselvl5gua0", noiselvl5gua[0], 0, fb);
 403         ENTRY(0x00000700, u8, pre, "noiselvl5gua1", noiselvl5gua[1], 0, fb);
 404         ENTRY(0x00000700, u8, pre, "noiselvl5gua2", noiselvl5gua[2], 0, fb);
 405 }
 406 #undef ENTRY /* It's specififc, uses local variable, don't use it (again). */
 407 
 408 static void bcm47xx_fill_sprom_path_r4589(struct ssb_sprom *sprom,
 409                                           const char *prefix, bool fallback)
 410 {
 411         char postfix[2];
 412         int i;
 413 
 414         for (i = 0; i < ARRAY_SIZE(sprom->core_pwr_info); i++) {
 415                 struct ssb_sprom_core_pwr_info *pwr_info;
 416 
 417                 pwr_info = &sprom->core_pwr_info[i];
 418 
 419                 snprintf(postfix, sizeof(postfix), "%i", i);
 420                 nvram_read_u8(prefix, postfix, "maxp2ga",
 421                               &pwr_info->maxpwr_2g, 0, fallback);
 422                 nvram_read_u8(prefix, postfix, "itt2ga",
 423                               &pwr_info->itssi_2g, 0, fallback);
 424                 nvram_read_u8(prefix, postfix, "itt5ga",
 425                               &pwr_info->itssi_5g, 0, fallback);
 426                 nvram_read_u16(prefix, postfix, "pa2gw0a",
 427                                &pwr_info->pa_2g[0], 0, fallback);
 428                 nvram_read_u16(prefix, postfix, "pa2gw1a",
 429                                &pwr_info->pa_2g[1], 0, fallback);
 430                 nvram_read_u16(prefix, postfix, "pa2gw2a",
 431                                &pwr_info->pa_2g[2], 0, fallback);
 432                 nvram_read_u8(prefix, postfix, "maxp5ga",
 433                               &pwr_info->maxpwr_5g, 0, fallback);
 434                 nvram_read_u8(prefix, postfix, "maxp5gha",
 435                               &pwr_info->maxpwr_5gh, 0, fallback);
 436                 nvram_read_u8(prefix, postfix, "maxp5gla",
 437                               &pwr_info->maxpwr_5gl, 0, fallback);
 438                 nvram_read_u16(prefix, postfix, "pa5gw0a",
 439                                &pwr_info->pa_5g[0], 0, fallback);
 440                 nvram_read_u16(prefix, postfix, "pa5gw1a",
 441                                &pwr_info->pa_5g[1], 0, fallback);
 442                 nvram_read_u16(prefix, postfix, "pa5gw2a",
 443                                &pwr_info->pa_5g[2], 0, fallback);
 444                 nvram_read_u16(prefix, postfix, "pa5glw0a",
 445                                &pwr_info->pa_5gl[0], 0, fallback);
 446                 nvram_read_u16(prefix, postfix, "pa5glw1a",
 447                                &pwr_info->pa_5gl[1], 0, fallback);
 448                 nvram_read_u16(prefix, postfix, "pa5glw2a",
 449                                &pwr_info->pa_5gl[2], 0, fallback);
 450                 nvram_read_u16(prefix, postfix, "pa5ghw0a",
 451                                &pwr_info->pa_5gh[0], 0, fallback);
 452                 nvram_read_u16(prefix, postfix, "pa5ghw1a",
 453                                &pwr_info->pa_5gh[1], 0, fallback);
 454                 nvram_read_u16(prefix, postfix, "pa5ghw2a",
 455                                &pwr_info->pa_5gh[2], 0, fallback);
 456         }
 457 }
 458 
 459 static void bcm47xx_fill_sprom_path_r45(struct ssb_sprom *sprom,
 460                                         const char *prefix, bool fallback)
 461 {
 462         char postfix[2];
 463         int i;
 464 
 465         for (i = 0; i < ARRAY_SIZE(sprom->core_pwr_info); i++) {
 466                 struct ssb_sprom_core_pwr_info *pwr_info;
 467 
 468                 pwr_info = &sprom->core_pwr_info[i];
 469 
 470                 snprintf(postfix, sizeof(postfix), "%i", i);
 471                 nvram_read_u16(prefix, postfix, "pa2gw3a",
 472                                &pwr_info->pa_2g[3], 0, fallback);
 473                 nvram_read_u16(prefix, postfix, "pa5gw3a",
 474                                &pwr_info->pa_5g[3], 0, fallback);
 475                 nvram_read_u16(prefix, postfix, "pa5glw3a",
 476                                &pwr_info->pa_5gl[3], 0, fallback);
 477                 nvram_read_u16(prefix, postfix, "pa5ghw3a",
 478                                &pwr_info->pa_5gh[3], 0, fallback);
 479         }
 480 }
 481 
 482 static bool bcm47xx_is_valid_mac(u8 *mac)
 483 {
 484         return mac && !(mac[0] == 0x00 && mac[1] == 0x90 && mac[2] == 0x4c);
 485 }
 486 
 487 static int bcm47xx_increase_mac_addr(u8 *mac, u8 num)
 488 {
 489         u8 *oui = mac + ETH_ALEN/2 - 1;
 490         u8 *p = mac + ETH_ALEN - 1;
 491 
 492         do {
 493                 (*p) += num;
 494                 if (*p > num)
 495                         break;
 496                 p--;
 497                 num = 1;
 498         } while (p != oui);
 499 
 500         if (p == oui) {
 501                 pr_err("unable to fetch mac address\n");
 502                 return -ENOENT;
 503         }
 504         return 0;
 505 }
 506 
 507 static int mac_addr_used = 2;
 508 
 509 static void bcm47xx_fill_sprom_ethernet(struct ssb_sprom *sprom,
 510                                         const char *prefix, bool fallback)
 511 {
 512         bool fb = fallback;
 513 
 514         nvram_read_macaddr(prefix, "et0macaddr", sprom->et0mac, fallback);
 515         nvram_read_u8(prefix, NULL, "et0mdcport", &sprom->et0mdcport, 0,
 516                       fallback);
 517         nvram_read_u8(prefix, NULL, "et0phyaddr", &sprom->et0phyaddr, 0,
 518                       fallback);
 519 
 520         nvram_read_macaddr(prefix, "et1macaddr", sprom->et1mac, fallback);
 521         nvram_read_u8(prefix, NULL, "et1mdcport", &sprom->et1mdcport, 0,
 522                       fallback);
 523         nvram_read_u8(prefix, NULL, "et1phyaddr", &sprom->et1phyaddr, 0,
 524                       fallback);
 525 
 526         nvram_read_macaddr(prefix, "et2macaddr", sprom->et2mac, fb);
 527         nvram_read_u8(prefix, NULL, "et2mdcport", &sprom->et2mdcport, 0, fb);
 528         nvram_read_u8(prefix, NULL, "et2phyaddr", &sprom->et2phyaddr, 0, fb);
 529 
 530         nvram_read_macaddr(prefix, "macaddr", sprom->il0mac, fallback);
 531         nvram_read_macaddr(prefix, "il0macaddr", sprom->il0mac, fallback);
 532 
 533         /* The address prefix 00:90:4C is used by Broadcom in their initial
 534          * configuration. When a mac address with the prefix 00:90:4C is used
 535          * all devices from the same series are sharing the same mac address.
 536          * To prevent mac address collisions we replace them with a mac address
 537          * based on the base address.
 538          */
 539         if (!bcm47xx_is_valid_mac(sprom->il0mac)) {
 540                 u8 mac[6];
 541 
 542                 nvram_read_macaddr(NULL, "et0macaddr", mac, false);
 543                 if (bcm47xx_is_valid_mac(mac)) {
 544                         int err = bcm47xx_increase_mac_addr(mac, mac_addr_used);
 545 
 546                         if (!err) {
 547                                 ether_addr_copy(sprom->il0mac, mac);
 548                                 mac_addr_used++;
 549                         }
 550                 }
 551         }
 552 }
 553 
 554 static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix,
 555                                     bool fallback)
 556 {
 557         nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
 558                          &sprom->boardflags_hi, fallback);
 559         nvram_read_u32_2(prefix, "boardflags2", &sprom->boardflags2_lo,
 560                          &sprom->boardflags2_hi, fallback);
 561 }
 562 
 563 void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix,
 564                         bool fallback)
 565 {
 566         bcm47xx_fill_sprom_ethernet(sprom, prefix, fallback);
 567         bcm47xx_fill_board_data(sprom, prefix, fallback);
 568 
 569         nvram_read_u8(prefix, NULL, "sromrev", &sprom->revision, 0, fallback);
 570 
 571         /* Entries requiring custom functions */
 572         nvram_read_alpha2(prefix, "ccode", sprom->alpha2, fallback);
 573         if (sprom->revision >= 3)
 574                 nvram_read_leddc(prefix, "leddc", &sprom->leddc_on_time,
 575                                  &sprom->leddc_off_time, fallback);
 576 
 577         switch (sprom->revision) {
 578         case 4:
 579         case 5:
 580                 bcm47xx_fill_sprom_path_r4589(sprom, prefix, fallback);
 581                 bcm47xx_fill_sprom_path_r45(sprom, prefix, fallback);
 582                 break;
 583         case 8:
 584         case 9:
 585                 bcm47xx_fill_sprom_path_r4589(sprom, prefix, fallback);
 586                 break;
 587         }
 588 
 589         bcm47xx_sprom_fill_auto(sprom, prefix, fallback);
 590 }
 591 
 592 #if IS_BUILTIN(CONFIG_SSB) && IS_ENABLED(CONFIG_SSB_SPROM)
 593 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
 594 {
 595         char prefix[10];
 596 
 597         switch (bus->bustype) {
 598         case SSB_BUSTYPE_SSB:
 599                 bcm47xx_fill_sprom(out, NULL, false);
 600                 return 0;
 601         case SSB_BUSTYPE_PCI:
 602                 memset(out, 0, sizeof(struct ssb_sprom));
 603                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 604                          bus->host_pci->bus->number + 1,
 605                          PCI_SLOT(bus->host_pci->devfn));
 606                 bcm47xx_fill_sprom(out, prefix, false);
 607                 return 0;
 608         default:
 609                 pr_warn("Unable to fill SPROM for given bustype.\n");
 610                 return -EINVAL;
 611         }
 612 }
 613 #endif
 614 
 615 #if IS_BUILTIN(CONFIG_BCMA)
 616 /*
 617  * Having many NVRAM entries for PCI devices led to repeating prefixes like
 618  * pci/1/1/ all the time and wasting flash space. So at some point Broadcom
 619  * decided to introduce prefixes like 0: 1: 2: etc.
 620  * If we find e.g. devpath0=pci/2/1 or devpath0=pci/2/1/ we should use 0:
 621  * instead of pci/2/1/.
 622  */
 623 static void bcm47xx_sprom_apply_prefix_alias(char *prefix, size_t prefix_size)
 624 {
 625         size_t prefix_len = strlen(prefix);
 626         size_t short_len = prefix_len - 1;
 627         char nvram_var[10];
 628         char buf[20];
 629         int i;
 630 
 631         /* Passed prefix has to end with a slash */
 632         if (prefix_len <= 0 || prefix[prefix_len - 1] != '/')
 633                 return;
 634 
 635         for (i = 0; i < 3; i++) {
 636                 if (snprintf(nvram_var, sizeof(nvram_var), "devpath%d", i) <= 0)
 637                         continue;
 638                 if (bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf)) < 0)
 639                         continue;
 640                 if (!strcmp(buf, prefix) ||
 641                     (short_len && strlen(buf) == short_len && !strncmp(buf, prefix, short_len))) {
 642                         snprintf(prefix, prefix_size, "%d:", i);
 643                         return;
 644                 }
 645         }
 646 }
 647 
 648 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 649 {
 650         struct bcma_boardinfo *binfo = &bus->boardinfo;
 651         struct bcma_device *core;
 652         char buf[10];
 653         char *prefix;
 654         bool fallback = false;
 655 
 656         switch (bus->hosttype) {
 657         case BCMA_HOSTTYPE_PCI:
 658                 memset(out, 0, sizeof(struct ssb_sprom));
 659                 /* On BCM47XX all PCI buses share the same domain */
 660                 if (IS_ENABLED(CONFIG_BCM47XX))
 661                         snprintf(buf, sizeof(buf), "pci/%u/%u/",
 662                                  bus->host_pci->bus->number + 1,
 663                                  PCI_SLOT(bus->host_pci->devfn));
 664                 else
 665                         snprintf(buf, sizeof(buf), "pci/%u/%u/",
 666                                  pci_domain_nr(bus->host_pci->bus) + 1,
 667                                  bus->host_pci->bus->number);
 668                 bcm47xx_sprom_apply_prefix_alias(buf, sizeof(buf));
 669                 prefix = buf;
 670                 break;
 671         case BCMA_HOSTTYPE_SOC:
 672                 memset(out, 0, sizeof(struct ssb_sprom));
 673                 core = bcma_find_core(bus, BCMA_CORE_80211);
 674                 if (core) {
 675                         snprintf(buf, sizeof(buf), "sb/%u/",
 676                                  core->core_index);
 677                         prefix = buf;
 678                         fallback = true;
 679                 } else {
 680                         prefix = NULL;
 681                 }
 682                 break;
 683         default:
 684                 pr_warn("Unable to fill SPROM for given bustype.\n");
 685                 return -EINVAL;
 686         }
 687 
 688         nvram_read_u16(prefix, NULL, "boardvendor", &binfo->vendor, 0, true);
 689         if (!binfo->vendor)
 690                 binfo->vendor = SSB_BOARDVENDOR_BCM;
 691         nvram_read_u16(prefix, NULL, "boardtype", &binfo->type, 0, true);
 692 
 693         bcm47xx_fill_sprom(out, prefix, fallback);
 694 
 695         return 0;
 696 }
 697 #endif
 698 
 699 static unsigned int bcm47xx_sprom_registered;
 700 
 701 /*
 702  * On bcm47xx we need to register SPROM fallback handler very early, so we can't
 703  * use anything like platform device / driver for this.
 704  */
 705 int bcm47xx_sprom_register_fallbacks(void)
 706 {
 707         if (bcm47xx_sprom_registered)
 708                 return 0;
 709 
 710 #if IS_BUILTIN(CONFIG_SSB) && IS_ENABLED(CONFIG_SSB_SPROM)
 711         if (ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb))
 712                 pr_warn("Failed to register ssb SPROM handler\n");
 713 #endif
 714 
 715 #if IS_BUILTIN(CONFIG_BCMA)
 716         if (bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma))
 717                 pr_warn("Failed to register bcma SPROM handler\n");
 718 #endif
 719 
 720         bcm47xx_sprom_registered = 1;
 721 
 722         return 0;
 723 }
 724 
 725 fs_initcall(bcm47xx_sprom_register_fallbacks);

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