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head/sys/dev/bhnd/cores/chipc/chipc.c
| Show First 20 Lines • Show All 363 Lines • ▼ Show 20 Lines | |||||
| * @param sc chipc driver state. | * @param sc chipc driver state. | ||||
| * @param caps capability flags to be used to derive NVRAM configuration. | * @param caps capability flags to be used to derive NVRAM configuration. | ||||
| */ | */ | ||||
| static bhnd_nvram_src | static bhnd_nvram_src | ||||
| chipc_find_nvram_src(struct chipc_softc *sc, struct chipc_caps *caps) | chipc_find_nvram_src(struct chipc_softc *sc, struct chipc_caps *caps) | ||||
| { | { | ||||
| uint32_t otp_st, srom_ctrl; | uint32_t otp_st, srom_ctrl; | ||||
| /* Very early devices vend SPROM/OTP/CIS (if at all) via the | |||||
| * host bridge interface instead of ChipCommon. */ | |||||
| if (!CHIPC_QUIRK(sc, SUPPORTS_SPROM)) | |||||
| return (BHND_NVRAM_SRC_UNKNOWN); | |||||
| /* | /* | ||||
| * Later chipset revisions standardized the SPROM capability flags and | |||||
| * register interfaces. | |||||
| * | |||||
| * We check for hardware presence in order of precedence. For example, | * We check for hardware presence in order of precedence. For example, | ||||
| * SPROM is is always used in preference to internal OTP if found. | * SPROM is is always used in preference to internal OTP if found. | ||||
| */ | */ | ||||
| if (caps->sprom) { | if (CHIPC_QUIRK(sc, SUPPORTS_SPROM) && caps->sprom) { | ||||
| srom_ctrl = bhnd_bus_read_4(sc->core, CHIPC_SPROM_CTRL); | srom_ctrl = bhnd_bus_read_4(sc->core, CHIPC_SPROM_CTRL); | ||||
| if (srom_ctrl & CHIPC_SRC_PRESENT) | if (srom_ctrl & CHIPC_SRC_PRESENT) | ||||
| return (BHND_NVRAM_SRC_SPROM); | return (BHND_NVRAM_SRC_SPROM); | ||||
| } | } | ||||
| /* Check for programmed OTP H/W subregion (contains SROM data) */ | /* Check for programmed OTP H/W subregion (contains SROM data) */ | ||||
| if (CHIPC_QUIRK(sc, SUPPORTS_OTP) && caps->otp_size > 0) { | if (CHIPC_QUIRK(sc, SUPPORTS_OTP) && caps->otp_size > 0) { | ||||
| /* TODO: need access to HND-OTP device */ | /* TODO: need access to HND-OTP device */ | ||||
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