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drivers/bcma/sprom.c
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/* * Broadcom specific AMBA * SPROM reading * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include <linux/bcma/bcma.h> #include <linux/bcma/bcma_regs.h> #include <linux/pci.h> #include <linux/io.h> #include <linux/dma-mapping.h> #include <linux/slab.h> #define SPOFF(offset) ((offset) / sizeof(u16)) /************************************************** * R/W ops. **************************************************/ |
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static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom) |
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{ int i; for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++) sprom[i] = bcma_read16(bus->drv_cc.core, |
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offset + (i * 2)); |
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} /************************************************** * 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; |
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if (revision != 8 && revision != 9) { |
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pr_err("Unsupported SPROM revision: %d ", revision); return -ENOENT; } return 0; } /************************************************** * SPROM extraction. **************************************************/ static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom) { u16 v; int i; |
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bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV; |
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for (i = 0; i < 3; i++) { v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i]; *(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v); } |
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bus->sprom.board_rev = sprom[SPOFF(SSB_SPROM8_BOARDREV)]; |
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bus->sprom.txpid2g[0] = (sprom[SPOFF(SSB_SPROM4_TXPID2G01)] & SSB_SPROM4_TXPID2G0) >> SSB_SPROM4_TXPID2G0_SHIFT; bus->sprom.txpid2g[1] = (sprom[SPOFF(SSB_SPROM4_TXPID2G01)] & SSB_SPROM4_TXPID2G1) >> SSB_SPROM4_TXPID2G1_SHIFT; bus->sprom.txpid2g[2] = (sprom[SPOFF(SSB_SPROM4_TXPID2G23)] & SSB_SPROM4_TXPID2G2) >> SSB_SPROM4_TXPID2G2_SHIFT; bus->sprom.txpid2g[3] = (sprom[SPOFF(SSB_SPROM4_TXPID2G23)] & SSB_SPROM4_TXPID2G3) >> SSB_SPROM4_TXPID2G3_SHIFT; bus->sprom.txpid5gl[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL01)] & SSB_SPROM4_TXPID5GL0) >> SSB_SPROM4_TXPID5GL0_SHIFT; bus->sprom.txpid5gl[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL01)] & SSB_SPROM4_TXPID5GL1) >> SSB_SPROM4_TXPID5GL1_SHIFT; bus->sprom.txpid5gl[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL23)] & SSB_SPROM4_TXPID5GL2) >> SSB_SPROM4_TXPID5GL2_SHIFT; bus->sprom.txpid5gl[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL23)] & SSB_SPROM4_TXPID5GL3) >> SSB_SPROM4_TXPID5GL3_SHIFT; bus->sprom.txpid5g[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5G01)] & SSB_SPROM4_TXPID5G0) >> SSB_SPROM4_TXPID5G0_SHIFT; bus->sprom.txpid5g[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5G01)] & SSB_SPROM4_TXPID5G1) >> SSB_SPROM4_TXPID5G1_SHIFT; bus->sprom.txpid5g[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5G23)] & SSB_SPROM4_TXPID5G2) >> SSB_SPROM4_TXPID5G2_SHIFT; bus->sprom.txpid5g[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5G23)] & SSB_SPROM4_TXPID5G3) >> SSB_SPROM4_TXPID5G3_SHIFT; bus->sprom.txpid5gh[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH01)] & SSB_SPROM4_TXPID5GH0) >> SSB_SPROM4_TXPID5GH0_SHIFT; bus->sprom.txpid5gh[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH01)] & SSB_SPROM4_TXPID5GH1) >> SSB_SPROM4_TXPID5GH1_SHIFT; bus->sprom.txpid5gh[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH23)] & SSB_SPROM4_TXPID5GH2) >> SSB_SPROM4_TXPID5GH2_SHIFT; bus->sprom.txpid5gh[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH23)] & SSB_SPROM4_TXPID5GH3) >> SSB_SPROM4_TXPID5GH3_SHIFT; |
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bus->sprom.boardflags_lo = sprom[SPOFF(SSB_SPROM8_BFLLO)]; bus->sprom.boardflags_hi = sprom[SPOFF(SSB_SPROM8_BFLHI)]; bus->sprom.boardflags2_lo = sprom[SPOFF(SSB_SPROM8_BFL2LO)]; bus->sprom.boardflags2_hi = sprom[SPOFF(SSB_SPROM8_BFL2HI)]; bus->sprom.country_code = sprom[SPOFF(SSB_SPROM8_CCODE)]; |
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bus->sprom.fem.ghz2.tssipos = (sprom[SPOFF(SSB_SPROM8_FEM2G)] & SSB_SROM8_FEM_TSSIPOS) >> SSB_SROM8_FEM_TSSIPOS_SHIFT; bus->sprom.fem.ghz2.extpa_gain = (sprom[SPOFF(SSB_SPROM8_FEM2G)] & SSB_SROM8_FEM_EXTPA_GAIN) >> SSB_SROM8_FEM_EXTPA_GAIN_SHIFT; bus->sprom.fem.ghz2.pdet_range = (sprom[SPOFF(SSB_SPROM8_FEM2G)] & SSB_SROM8_FEM_PDET_RANGE) >> SSB_SROM8_FEM_PDET_RANGE_SHIFT; bus->sprom.fem.ghz2.tr_iso = (sprom[SPOFF(SSB_SPROM8_FEM2G)] & SSB_SROM8_FEM_TR_ISO) >> SSB_SROM8_FEM_TR_ISO_SHIFT; bus->sprom.fem.ghz2.antswlut = (sprom[SPOFF(SSB_SPROM8_FEM2G)] & SSB_SROM8_FEM_ANTSWLUT) >> SSB_SROM8_FEM_ANTSWLUT_SHIFT; bus->sprom.fem.ghz5.tssipos = (sprom[SPOFF(SSB_SPROM8_FEM5G)] & SSB_SROM8_FEM_TSSIPOS) >> SSB_SROM8_FEM_TSSIPOS_SHIFT; bus->sprom.fem.ghz5.extpa_gain = (sprom[SPOFF(SSB_SPROM8_FEM5G)] & SSB_SROM8_FEM_EXTPA_GAIN) >> SSB_SROM8_FEM_EXTPA_GAIN_SHIFT; bus->sprom.fem.ghz5.pdet_range = (sprom[SPOFF(SSB_SPROM8_FEM5G)] & SSB_SROM8_FEM_PDET_RANGE) >> SSB_SROM8_FEM_PDET_RANGE_SHIFT; bus->sprom.fem.ghz5.tr_iso = (sprom[SPOFF(SSB_SPROM8_FEM5G)] & SSB_SROM8_FEM_TR_ISO) >> SSB_SROM8_FEM_TR_ISO_SHIFT; bus->sprom.fem.ghz5.antswlut = (sprom[SPOFF(SSB_SPROM8_FEM5G)] & SSB_SROM8_FEM_ANTSWLUT) >> SSB_SROM8_FEM_ANTSWLUT_SHIFT; |
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} int bcma_sprom_get(struct bcma_bus *bus) { |
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u16 offset; |
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u16 *sprom; int err = 0; if (!bus->drv_cc.core) return -EOPNOTSUPP; |
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if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM)) return -ENOENT; |
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sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), GFP_KERNEL); if (!sprom) return -ENOMEM; |
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if (bus->chipinfo.id == 0x4331) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false); |
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/* Most cards have SPROM moved by additional offset 0x30 (48 dwords). * According to brcm80211 this applies to cards with PCIe rev >= 6 * TODO: understand this condition and use it */ offset = (bus->chipinfo.id == 0x4331) ? BCMA_CC_SPROM : BCMA_CC_SPROM_PCIE6; bcma_sprom_read(bus, offset, sprom); |
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if (bus->chipinfo.id == 0x4331) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true); |
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err = bcma_sprom_valid(sprom); if (err) goto out; bcma_sprom_extract_r8(bus, sprom); out: kfree(sprom); return err; } |