drivers/bcma/sprom.c

   1 /*
   2  * Broadcom specific AMBA
   3  * SPROM reading
   4  *
   5  * Licensed under the GNU/GPL. See COPYING for details.
   6  */
   7
   8 #include "bcma_private.h"
   9
  10 #include <linux/bcma/bcma.h>
  11 #include <linux/bcma/bcma_regs.h>
  12 #include <linux/pci.h>
  13 #include <linux/io.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/slab.h>
  16
  17 /**************************************************
  18  * R/W ops.
  19  **************************************************/
  20
  21 static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom)
  22 {
  23         int i;
  24         for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++)
  25                 sprom[i] = bcma_read16(bus->drv_cc.core,
  26                                        offset + (i * 2));
  27 }
  28
  29 /**************************************************
  30  * Validation.
  31  **************************************************/
  32
  33 static inline u8 bcma_crc8(u8 crc, u8 data)
  34 {
  35         /* Polynomial:   x^8 + x^7 + x^6 + x^4 + x^2 + 1   */
  36         static const u8 t[] = {
  37                 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
  38                 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
  39                 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
  40                 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
  41                 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
  42                 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
  43                 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
  44                 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
  45                 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
  46                 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
  47                 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
  48                 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
  49                 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
  50                 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
  51                 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
  52                 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
  53                 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
  54                 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
  55                 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
  56                 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
  57                 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
  58                 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
  59                 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
  60                 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
  61                 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
  62                 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
  63                 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
  64                 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
  65                 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
  66                 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
  67                 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
  68                 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
  69         };
  70         return t[crc ^ data];
  71 }
  72
  73 static u8 bcma_sprom_crc(const u16 *sprom)
  74 {
  75         int word;
  76         u8 crc = 0xFF;
  77
  78         for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) {
  79                 crc = bcma_crc8(crc, sprom[word] & 0x00FF);
  80                 crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);
  81         }
  82         crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF);
  83         crc ^= 0xFF;
  84
  85         return crc;
  86 }
  87
  88 static int bcma_sprom_check_crc(const u16 *sprom)
  89 {
  90         u8 crc;
  91         u8 expected_crc;
  92         u16 tmp;
  93
  94         crc = bcma_sprom_crc(sprom);
  95         tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC;
  96         expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
  97         if (crc != expected_crc)
  98                 return -EPROTO;
  99
 100         return 0;
 101 }
 102
 103 static int bcma_sprom_valid(const u16 *sprom)
 104 {
 105         u16 revision;
 106         int err;
 107
 108         err = bcma_sprom_check_crc(sprom);
 109         if (err)
 110                 return err;
 111
 112         revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV;
 113         if (revision != 8 && revision != 9) {
 114                 pr_err("Unsupported SPROM revision: %d\n", revision);
 115                 return -ENOENT;
 116         }
 117
 118         return 0;
 119 }
 120
 121 /**************************************************
 122  * SPROM extraction.
 123  **************************************************/
 124
 125 #define SPOFF(offset)   ((offset) / sizeof(u16))
 126
 127 #define SPEX(_field, _offset, _mask, _shift)    \
 128         bus->sprom._field = ((sprom[SPOFF(_offset)] & (_mask)) >> (_shift))
 129
 130 static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)
 131 {
 132         u16 v, o;
 133         int i;
 134         u16 pwr_info_offset[] = {
 135                 SSB_SROM8_PWR_INFO_CORE0, SSB_SROM8_PWR_INFO_CORE1,
 136                 SSB_SROM8_PWR_INFO_CORE2, SSB_SROM8_PWR_INFO_CORE3
 137         };
 138         BUILD_BUG_ON(ARRAY_SIZE(pwr_info_offset) !=
 139                         ARRAY_SIZE(bus->sprom.core_pwr_info));
 140
 141         bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] &
 142                 SSB_SPROM_REVISION_REV;
 143
 144         for (i = 0; i < 3; i++) {
 145                 v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i];
 146                 *(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v);
 147         }
 148
 149         SPEX(board_rev, SSB_SPROM8_BOARDREV, ~0, 0);
 150
 151         SPEX(txpid2g[0], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G0,
 152              SSB_SPROM4_TXPID2G0_SHIFT);
 153         SPEX(txpid2g[1], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G1,
 154              SSB_SPROM4_TXPID2G1_SHIFT);
 155         SPEX(txpid2g[2], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G2,
 156              SSB_SPROM4_TXPID2G2_SHIFT);
 157         SPEX(txpid2g[3], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G3,
 158              SSB_SPROM4_TXPID2G3_SHIFT);
 159
 160         SPEX(txpid5gl[0], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL0,
 161              SSB_SPROM4_TXPID5GL0_SHIFT);
 162         SPEX(txpid5gl[1], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL1,
 163              SSB_SPROM4_TXPID5GL1_SHIFT);
 164         SPEX(txpid5gl[2], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL2,
 165              SSB_SPROM4_TXPID5GL2_SHIFT);
 166         SPEX(txpid5gl[3], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL3,
 167              SSB_SPROM4_TXPID5GL3_SHIFT);
 168
 169         SPEX(txpid5g[0], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G0,
 170              SSB_SPROM4_TXPID5G0_SHIFT);
 171         SPEX(txpid5g[1], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G1,
 172              SSB_SPROM4_TXPID5G1_SHIFT);
 173         SPEX(txpid5g[2], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G2,
 174              SSB_SPROM4_TXPID5G2_SHIFT);
 175         SPEX(txpid5g[3], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G3,
 176              SSB_SPROM4_TXPID5G3_SHIFT);
 177
 178         SPEX(txpid5gh[0], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH0,
 179              SSB_SPROM4_TXPID5GH0_SHIFT);
 180         SPEX(txpid5gh[1], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH1,
 181              SSB_SPROM4_TXPID5GH1_SHIFT);
 182         SPEX(txpid5gh[2], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH2,
 183              SSB_SPROM4_TXPID5GH2_SHIFT);
 184         SPEX(txpid5gh[3], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH3,
 185              SSB_SPROM4_TXPID5GH3_SHIFT);
 186
 187         SPEX(boardflags_lo, SSB_SPROM8_BFLLO, ~0, 0);
 188         SPEX(boardflags_hi, SSB_SPROM8_BFLHI, ~0, 0);
 189         SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, ~0, 0);
 190         SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, ~0, 0);
 191
 192         SPEX(country_code, SSB_SPROM8_CCODE, ~0, 0);
 193
 194         /* Extract cores power info info */
 195         for (i = 0; i < ARRAY_SIZE(pwr_info_offset); i++) {
 196                 o = pwr_info_offset[i];
 197                 SPEX(core_pwr_info[i].itssi_2g, o + SSB_SROM8_2G_MAXP_ITSSI,
 198                         SSB_SPROM8_2G_ITSSI, SSB_SPROM8_2G_ITSSI_SHIFT);
 199                 SPEX(core_pwr_info[i].maxpwr_2g, o + SSB_SROM8_2G_MAXP_ITSSI,
 200                         SSB_SPROM8_2G_MAXP, 0);
 201
 202                 SPEX(core_pwr_info[i].pa_2g[0], o + SSB_SROM8_2G_PA_0, ~0, 0);
 203                 SPEX(core_pwr_info[i].pa_2g[1], o + SSB_SROM8_2G_PA_1, ~0, 0);
 204                 SPEX(core_pwr_info[i].pa_2g[2], o + SSB_SROM8_2G_PA_2, ~0, 0);
 205
 206                 SPEX(core_pwr_info[i].itssi_5g, o + SSB_SROM8_5G_MAXP_ITSSI,
 207                         SSB_SPROM8_5G_ITSSI, SSB_SPROM8_5G_ITSSI_SHIFT);
 208                 SPEX(core_pwr_info[i].maxpwr_5g, o + SSB_SROM8_5G_MAXP_ITSSI,
 209                         SSB_SPROM8_5G_MAXP, 0);
 210                 SPEX(core_pwr_info[i].maxpwr_5gh, o + SSB_SPROM8_5GHL_MAXP,
 211                         SSB_SPROM8_5GH_MAXP, 0);
 212                 SPEX(core_pwr_info[i].maxpwr_5gl, o + SSB_SPROM8_5GHL_MAXP,
 213                         SSB_SPROM8_5GL_MAXP, SSB_SPROM8_5GL_MAXP_SHIFT);
 214
 215                 SPEX(core_pwr_info[i].pa_5gl[0], o + SSB_SROM8_5GL_PA_0, ~0, 0);
 216                 SPEX(core_pwr_info[i].pa_5gl[1], o + SSB_SROM8_5GL_PA_1, ~0, 0);
 217                 SPEX(core_pwr_info[i].pa_5gl[2], o + SSB_SROM8_5GL_PA_2, ~0, 0);
 218                 SPEX(core_pwr_info[i].pa_5g[0], o + SSB_SROM8_5G_PA_0, ~0, 0);
 219                 SPEX(core_pwr_info[i].pa_5g[1], o + SSB_SROM8_5G_PA_1, ~0, 0);
 220                 SPEX(core_pwr_info[i].pa_5g[2], o + SSB_SROM8_5G_PA_2, ~0, 0);
 221                 SPEX(core_pwr_info[i].pa_5gh[0], o + SSB_SROM8_5GH_PA_0, ~0, 0);
 222                 SPEX(core_pwr_info[i].pa_5gh[1], o + SSB_SROM8_5GH_PA_1, ~0, 0);
 223                 SPEX(core_pwr_info[i].pa_5gh[2], o + SSB_SROM8_5GH_PA_2, ~0, 0);
 224         }
 225
 226         SPEX(fem.ghz2.tssipos, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TSSIPOS,
 227              SSB_SROM8_FEM_TSSIPOS_SHIFT);
 228         SPEX(fem.ghz2.extpa_gain, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_EXTPA_GAIN,
 229              SSB_SROM8_FEM_EXTPA_GAIN_SHIFT);
 230         SPEX(fem.ghz2.pdet_range, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_PDET_RANGE,
 231              SSB_SROM8_FEM_PDET_RANGE_SHIFT);
 232         SPEX(fem.ghz2.tr_iso, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TR_ISO,
 233              SSB_SROM8_FEM_TR_ISO_SHIFT);
 234         SPEX(fem.ghz2.antswlut, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_ANTSWLUT,
 235              SSB_SROM8_FEM_ANTSWLUT_SHIFT);
 236
 237         SPEX(fem.ghz5.tssipos, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TSSIPOS,
 238              SSB_SROM8_FEM_TSSIPOS_SHIFT);
 239         SPEX(fem.ghz5.extpa_gain, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_EXTPA_GAIN,
 240              SSB_SROM8_FEM_EXTPA_GAIN_SHIFT);
 241         SPEX(fem.ghz5.pdet_range, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_PDET_RANGE,
 242              SSB_SROM8_FEM_PDET_RANGE_SHIFT);
 243         SPEX(fem.ghz5.tr_iso, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TR_ISO,
 244              SSB_SROM8_FEM_TR_ISO_SHIFT);
 245         SPEX(fem.ghz5.antswlut, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_ANTSWLUT,
 246              SSB_SROM8_FEM_ANTSWLUT_SHIFT);
 247 }
 248
 249 int bcma_sprom_get(struct bcma_bus *bus)
 250 {
 251         u16 offset;
 252         u16 *sprom;
 253         int err = 0;
 254
 255         if (!bus->drv_cc.core)
 256                 return -EOPNOTSUPP;
 257
 258         if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM))
 259                 return -ENOENT;
 260
 261         sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
 262                         GFP_KERNEL);
 263         if (!sprom)
 264                 return -ENOMEM;
 265
 266         if (bus->chipinfo.id == 0x4331)
 267                 bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);
 268
 269         /* Most cards have SPROM moved by additional offset 0x30 (48 dwords).
 270          * According to brcm80211 this applies to cards with PCIe rev >= 6
 271          * TODO: understand this condition and use it */
 272         offset = (bus->chipinfo.id == 0x4331) ? BCMA_CC_SPROM :
 273                 BCMA_CC_SPROM_PCIE6;
 274         pr_debug("SPROM offset 0x%x\n", offset);
 275         bcma_sprom_read(bus, offset, sprom);
 276
 277         if (bus->chipinfo.id == 0x4331)
 278                 bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);
 279
 280         err = bcma_sprom_valid(sprom);
 281         if (err)
 282                 goto out;
 283
 284         bcma_sprom_extract_r8(bus, sprom);
 285
 286 out:
 287         kfree(sprom);
 288         return err;
 289 }