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