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 } 290