/* * Broadcom specific AMBA * SPROM reading * * Copyright 2011, 2012, Hauke Mehrtens * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include #include #include #include #include #include static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out); /** * bcma_arch_register_fallback_sprom - Registers a method providing a * fallback SPROM if no SPROM is found. * * @sprom_callback: The callback function. * * With this function the architecture implementation may register a * callback handler which fills the SPROM data structure. The fallback is * used for PCI based BCMA devices, where no valid SPROM can be found * in the shadow registers and to provide the SPROM for SoCs where BCMA is * to controll the system bus. * * This function is useful for weird architectures that have a half-assed * BCMA device hardwired to their PCI bus. * * This function is available for architecture code, only. So it is not * exported. */ int bcma_arch_register_fallback_sprom(int (*sprom_callback)(struct bcma_bus *bus, struct ssb_sprom *out)) { if (get_fallback_sprom) return -EEXIST; get_fallback_sprom = sprom_callback; return 0; } static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus, struct ssb_sprom *out) { int err; if (!get_fallback_sprom) { err = -ENOENT; goto fail; } err = get_fallback_sprom(bus, out); if (err) goto fail; pr_debug("Using SPROM revision %d provided by" " platform.\n", bus->sprom.revision); return 0; fail: pr_warn("Using fallback SPROM failed (err %d)\n", err); return err; } /************************************************** * R/W ops. **************************************************/ static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom) { int i; for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++) sprom[i] = bcma_read16(bus->drv_cc.core, offset + (i * 2)); } /************************************************** * Validation. **************************************************/ static inline u8 bcma_crc8(u8 crc, u8 data) { /* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */ static const u8 t[] = { 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B, 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21, 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF, 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5, 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14, 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E, 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80, 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA, 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95, 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF, 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01, 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B, 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA, 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0, 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E, 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34, 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0, 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A, 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54, 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E, 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF, 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5, 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B, 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61, 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E, 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74, 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA, 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0, 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41, 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B, 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5, 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F, }; return t[crc ^ data]; } static u8 bcma_sprom_crc(const u16 *sprom) { int word; u8 crc = 0xFF; for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) { crc = bcma_crc8(crc, sprom[word] & 0x00FF); crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8); } crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF); crc ^= 0xFF; return crc; } static int bcma_sprom_check_crc(const u16 *sprom) { u8 crc; u8 expected_crc; u16 tmp; crc = bcma_sprom_crc(sprom); tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC; expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT; if (crc != expected_crc) return -EPROTO; return 0; } static int bcma_sprom_valid(const u16 *sprom) { u16 revision; int err; err = bcma_sprom_check_crc(sprom); if (err) return err; revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV; if (revision != 8 && revision != 9) { pr_err("Unsupported SPROM revision: %d\n", revision); return -ENOENT; } return 0; } /************************************************** * SPROM extraction. **************************************************/ #define SPOFF(offset) ((offset) / sizeof(u16)) #define SPEX(_field, _offset, _mask, _shift) \ bus->sprom._field = ((sprom[SPOFF(_offset)] & (_mask)) >> (_shift)) static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom) { u16 v, o; int i; u16 pwr_info_offset[] = { SSB_SROM8_PWR_INFO_CORE0, SSB_SROM8_PWR_INFO_CORE1, SSB_SROM8_PWR_INFO_CORE2, SSB_SROM8_PWR_INFO_CORE3 }; BUILD_BUG_ON(ARRAY_SIZE(pwr_info_offset) != ARRAY_SIZE(bus->sprom.core_pwr_info)); bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV; for (i = 0; i < 3; i++) { v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i]; *(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v); } SPEX(board_rev, SSB_SPROM8_BOARDREV, ~0, 0); SPEX(txpid2g[0], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G0, SSB_SPROM4_TXPID2G0_SHIFT); SPEX(txpid2g[1], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G1, SSB_SPROM4_TXPID2G1_SHIFT); SPEX(txpid2g[2], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G2, SSB_SPROM4_TXPID2G2_SHIFT); SPEX(txpid2g[3], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G3, SSB_SPROM4_TXPID2G3_SHIFT); SPEX(txpid5gl[0], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL0, SSB_SPROM4_TXPID5GL0_SHIFT); SPEX(txpid5gl[1], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL1, SSB_SPROM4_TXPID5GL1_SHIFT); SPEX(txpid5gl[2], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL2, SSB_SPROM4_TXPID5GL2_SHIFT); SPEX(txpid5gl[3], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL3, SSB_SPROM4_TXPID5GL3_SHIFT); SPEX(txpid5g[0], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G0, SSB_SPROM4_TXPID5G0_SHIFT); SPEX(txpid5g[1], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G1, SSB_SPROM4_TXPID5G1_SHIFT); SPEX(txpid5g[2], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G2, SSB_SPROM4_TXPID5G2_SHIFT); SPEX(txpid5g[3], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G3, SSB_SPROM4_TXPID5G3_SHIFT); SPEX(txpid5gh[0], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH0, SSB_SPROM4_TXPID5GH0_SHIFT); SPEX(txpid5gh[1], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH1, SSB_SPROM4_TXPID5GH1_SHIFT); SPEX(txpid5gh[2], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH2, SSB_SPROM4_TXPID5GH2_SHIFT); SPEX(txpid5gh[3], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH3, SSB_SPROM4_TXPID5GH3_SHIFT); SPEX(boardflags_lo, SSB_SPROM8_BFLLO, ~0, 0); SPEX(boardflags_hi, SSB_SPROM8_BFLHI, ~0, 0); SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, ~0, 0); SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, ~0, 0); SPEX(country_code, SSB_SPROM8_CCODE, ~0, 0); /* Extract cores power info info */ for (i = 0; i < ARRAY_SIZE(pwr_info_offset); i++) { o = pwr_info_offset[i]; SPEX(core_pwr_info[i].itssi_2g, o + SSB_SROM8_2G_MAXP_ITSSI, SSB_SPROM8_2G_ITSSI, SSB_SPROM8_2G_ITSSI_SHIFT); SPEX(core_pwr_info[i].maxpwr_2g, o + SSB_SROM8_2G_MAXP_ITSSI, SSB_SPROM8_2G_MAXP, 0); SPEX(core_pwr_info[i].pa_2g[0], o + SSB_SROM8_2G_PA_0, ~0, 0); SPEX(core_pwr_info[i].pa_2g[1], o + SSB_SROM8_2G_PA_1, ~0, 0); SPEX(core_pwr_info[i].pa_2g[2], o + SSB_SROM8_2G_PA_2, ~0, 0); SPEX(core_pwr_info[i].itssi_5g, o + SSB_SROM8_5G_MAXP_ITSSI, SSB_SPROM8_5G_ITSSI, SSB_SPROM8_5G_ITSSI_SHIFT); SPEX(core_pwr_info[i].maxpwr_5g, o + SSB_SROM8_5G_MAXP_ITSSI, SSB_SPROM8_5G_MAXP, 0); SPEX(core_pwr_info[i].maxpwr_5gh, o + SSB_SPROM8_5GHL_MAXP, SSB_SPROM8_5GH_MAXP, 0); SPEX(core_pwr_info[i].maxpwr_5gl, o + SSB_SPROM8_5GHL_MAXP, SSB_SPROM8_5GL_MAXP, SSB_SPROM8_5GL_MAXP_SHIFT); SPEX(core_pwr_info[i].pa_5gl[0], o + SSB_SROM8_5GL_PA_0, ~0, 0); SPEX(core_pwr_info[i].pa_5gl[1], o + SSB_SROM8_5GL_PA_1, ~0, 0); SPEX(core_pwr_info[i].pa_5gl[2], o + SSB_SROM8_5GL_PA_2, ~0, 0); SPEX(core_pwr_info[i].pa_5g[0], o + SSB_SROM8_5G_PA_0, ~0, 0); SPEX(core_pwr_info[i].pa_5g[1], o + SSB_SROM8_5G_PA_1, ~0, 0); SPEX(core_pwr_info[i].pa_5g[2], o + SSB_SROM8_5G_PA_2, ~0, 0); SPEX(core_pwr_info[i].pa_5gh[0], o + SSB_SROM8_5GH_PA_0, ~0, 0); SPEX(core_pwr_info[i].pa_5gh[1], o + SSB_SROM8_5GH_PA_1, ~0, 0); SPEX(core_pwr_info[i].pa_5gh[2], o + SSB_SROM8_5GH_PA_2, ~0, 0); } SPEX(fem.ghz2.tssipos, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TSSIPOS, SSB_SROM8_FEM_TSSIPOS_SHIFT); SPEX(fem.ghz2.extpa_gain, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_EXTPA_GAIN, SSB_SROM8_FEM_EXTPA_GAIN_SHIFT); SPEX(fem.ghz2.pdet_range, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_PDET_RANGE, SSB_SROM8_FEM_PDET_RANGE_SHIFT); SPEX(fem.ghz2.tr_iso, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TR_ISO, SSB_SROM8_FEM_TR_ISO_SHIFT); SPEX(fem.ghz2.antswlut, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_ANTSWLUT, SSB_SROM8_FEM_ANTSWLUT_SHIFT); SPEX(fem.ghz5.tssipos, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TSSIPOS, SSB_SROM8_FEM_TSSIPOS_SHIFT); SPEX(fem.ghz5.extpa_gain, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_EXTPA_GAIN, SSB_SROM8_FEM_EXTPA_GAIN_SHIFT); SPEX(fem.ghz5.pdet_range, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_PDET_RANGE, SSB_SROM8_FEM_PDET_RANGE_SHIFT); SPEX(fem.ghz5.tr_iso, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TR_ISO, SSB_SROM8_FEM_TR_ISO_SHIFT); SPEX(fem.ghz5.antswlut, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_ANTSWLUT, SSB_SROM8_FEM_ANTSWLUT_SHIFT); } /* * Indicates the presence of external SPROM. */ static bool bcma_sprom_ext_available(struct bcma_bus *bus) { u32 chip_status; u32 srom_control; u32 present_mask; if (bus->drv_cc.core->id.rev >= 31) { if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM)) return false; srom_control = bcma_read32(bus->drv_cc.core, BCMA_CC_SROM_CONTROL); return srom_control & BCMA_CC_SROM_CONTROL_PRESENT; } /* older chipcommon revisions use chip status register */ chip_status = bcma_read32(bus->drv_cc.core, BCMA_CC_CHIPSTAT); switch (bus->chipinfo.id) { case 0x4313: present_mask = BCMA_CC_CHIPST_4313_SPROM_PRESENT; break; case 0x4331: present_mask = BCMA_CC_CHIPST_4331_SPROM_PRESENT; break; default: return true; } return chip_status & present_mask; } /* * Indicates that on-chip OTP memory is present and enabled. */ static bool bcma_sprom_onchip_available(struct bcma_bus *bus) { u32 chip_status; u32 otpsize = 0; bool present; chip_status = bcma_read32(bus->drv_cc.core, BCMA_CC_CHIPSTAT); switch (bus->chipinfo.id) { case 0x4313: present = chip_status & BCMA_CC_CHIPST_4313_OTP_PRESENT; break; case 0x4331: present = chip_status & BCMA_CC_CHIPST_4331_OTP_PRESENT; break; case 43224: case 43225: /* for these chips OTP is always available */ present = true; break; default: present = false; break; } if (present) { otpsize = bus->drv_cc.capabilities & BCMA_CC_CAP_OTPS; otpsize >>= BCMA_CC_CAP_OTPS_SHIFT; } return otpsize != 0; } /* * Verify OTP is filled and determine the byte * offset where SPROM data is located. * * On error, returns 0; byte offset otherwise. */ static int bcma_sprom_onchip_offset(struct bcma_bus *bus) { struct bcma_device *cc = bus->drv_cc.core; u32 offset; /* verify OTP status */ if ((bcma_read32(cc, BCMA_CC_OTPS) & BCMA_CC_OTPS_GU_PROG_HW) == 0) return 0; /* obtain bit offset from otplayout register */ offset = (bcma_read32(cc, BCMA_CC_OTPL) & BCMA_CC_OTPL_GURGN_OFFSET); return BCMA_CC_SPROM + (offset >> 3); } int bcma_sprom_get(struct bcma_bus *bus) { u16 offset = BCMA_CC_SPROM; u16 *sprom; int err = 0; if (!bus->drv_cc.core) return -EOPNOTSUPP; if (!bcma_sprom_ext_available(bus)) { bool sprom_onchip; /* * External SPROM takes precedence so check * on-chip OTP only when no external SPROM * is present. */ sprom_onchip = bcma_sprom_onchip_available(bus); if (sprom_onchip) { /* determine offset */ offset = bcma_sprom_onchip_offset(bus); } if (!offset || !sprom_onchip) { /* * Maybe there is no SPROM on the device? * Now we ask the arch code if there is some sprom * available for this device in some other storage. */ err = bcma_fill_sprom_with_fallback(bus, &bus->sprom); return err; } } sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), GFP_KERNEL); if (!sprom) return -ENOMEM; if (bus->chipinfo.id == 0x4331) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false); pr_debug("SPROM offset 0x%x\n", offset); bcma_sprom_read(bus, offset, sprom); if (bus->chipinfo.id == 0x4331) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true); err = bcma_sprom_valid(sprom); if (err) goto out; bcma_sprom_extract_r8(bus, sprom); out: kfree(sprom); return err; }