/**
* Use device-specific ChipStatus flags to determine the preferred NVRAM
* data source.
*/
static bhnd_nvram_src_t
chipc_nvram_src_chipst(struct chipc_softc *sc)
{
uint8_t nvram_sel;
CHIPC_ASSERT_QUIRK(sc, SPROM_CHECK_CHIPST);
if (CHIPC_QUIRK(sc, SPROM_CHECK_CST_R22)) {
// TODO: On these devices, the official driver code always
// assumes SPROM availability if CHIPC_CST_OTP_SEL is not
// set; we must review against the actual behavior of our
// BCM4312 hardware
nvram_sel = CHIPC_GET_ATTR(sc->cst, CST_SPROM_OTP_SEL_R22);
} else if (CHIPC_QUIRK(sc, SPROM_CHECK_CST_R23)) {
nvram_sel = CHIPC_GET_ATTR(sc->cst, CST_SPROM_OTP_SEL_R23);
} else {
panic("invalid CST OTP/SPROM chipc quirk flags");
}
device_printf(sc->dev, "querying chipst for 0x%x, 0x%x\n", sc->ccid.chip_id, sc->cst);
switch (nvram_sel) {
case CHIPC_CST_DEFCIS_SEL:
return (BHND_NVRAM_SRC_CIS);
case CHIPC_CST_SPROM_SEL:
case CHIPC_CST_OTP_PWRDN:
return (BHND_NVRAM_SRC_SPROM);
case CHIPC_CST_OTP_SEL:
return (BHND_NVRAM_SRC_OTP);
default:
device_printf(sc->dev, "unrecognized OTP/SPROM type 0x%hhx",
nvram_sel);
return (BHND_NVRAM_SRC_NONE);
}
}
/* Read and parse chipc capabilities */
static int
chipc_read_caps(struct chipc_softc *sc, struct chipc_caps *caps)
{
uint32_t cap_reg;
uint32_t cap_ext_reg;
uint32_t regval;
/* Fetch cap registers */
cap_reg = bhnd_bus_read_4(sc->core, CHIPC_CAPABILITIES);
cap_ext_reg = 0;
if (CHIPC_QUIRK(sc, SUPPORTS_CAP_EXT))
cap_ext_reg = bhnd_bus_read_4(sc->core, CHIPC_CAPABILITIES_EXT);
/* Extract values */
caps->num_uarts = CHIPC_GET_BITS(cap_reg, CHIPC_CAP_NUM_UART);
caps->mipseb = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_MIPSEB);
caps->uart_gpio = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_UARTGPIO);
caps->uart_clock = CHIPC_GET_BITS(cap_reg, CHIPC_CAP_UCLKSEL);
caps->extbus_type = CHIPC_GET_BITS(cap_reg, CHIPC_CAP_EXTBUS);
caps->pwr_ctrl = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_PWR_CTL);
caps->jtag_master = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_JTAGP);
caps->pll_type = CHIPC_GET_BITS(cap_reg, CHIPC_CAP_PLL);
caps->backplane_64 = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_BKPLN64);
caps->boot_rom = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_ROM);
caps->pmu = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_PMU);
caps->eci = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_ECI);
caps->sprom = CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_SPROM);
caps->otp_size = CHIPC_GET_BITS(cap_reg, CHIPC_CAP_OTP_SIZE);
caps->seci = CHIPC_GET_FLAG(cap_ext_reg, CHIPC_CAP2_SECI);
caps->gsio = CHIPC_GET_FLAG(cap_ext_reg, CHIPC_CAP2_GSIO);
caps->aob = CHIPC_GET_FLAG(cap_ext_reg, CHIPC_CAP2_AOB);
/* Fetch OTP size for later IPX controller revisions */
if (CHIPC_QUIRK(sc, IPX_OTPL_SIZE)) {
regval = bhnd_bus_read_4(sc->core, CHIPC_OTPLAYOUT);
caps->otp_size = CHIPC_GET_BITS(regval, CHIPC_OTPL_SIZE);
}
/* Determine flash type and parameters */
caps->cfi_width = 0;
switch (CHIPC_GET_BITS(cap_reg, CHIPC_CAP_FLASH)) {
case CHIPC_CAP_SFLASH_ST:
caps->flash_type = CHIPC_SFLASH_ST;
break;
case CHIPC_CAP_SFLASH_AT:
caps->flash_type = CHIPC_SFLASH_AT;
break;
case CHIPC_CAP_NFLASH:
/* unimplemented */
caps->flash_type = CHIPC_NFLASH;
break;
case CHIPC_CAP_PFLASH:
caps->flash_type = CHIPC_PFLASH_CFI;
/* determine cfi width */
regval = bhnd_bus_read_4(sc->core, CHIPC_FLASH_CFG);
if (CHIPC_GET_FLAG(regval, CHIPC_FLASH_CFG_DS))
caps->cfi_width = 2;
else
caps->cfi_width = 1;
break;
case CHIPC_CAP_FLASH_NONE:
caps->flash_type = CHIPC_FLASH_NONE;
break;
}
/* Handle 4706_NFLASH fallback */
if (CHIPC_QUIRK(sc, 4706_NFLASH) &&
CHIPC_GET_FLAG(cap_reg, CHIPC_CAP_4706_NFLASH))
{
caps->flash_type = CHIPC_NFLASH_4706;
}
/* Determine NVRAM source. Must occur after the SPROM/OTP/flash
* capability flags have been populated. */
caps->nvram_src = chipc_find_nvram_src(sc, caps);
/* Determine the SPROM offset within OTP (if any). SPROM-formatted
* data is placed within the OTP general use region. */
caps->sprom_offset = 0;
if (caps->nvram_src == BHND_NVRAM_SRC_OTP) {
CHIPC_ASSERT_QUIRK(sc, OTP_IPX);
/* Bit offset to GUP HW subregion containing SPROM data */
regval = bhnd_bus_read_4(sc->core, CHIPC_OTPLAYOUT);
caps->sprom_offset = CHIPC_GET_BITS(regval, CHIPC_OTPL_GUP);
/* Convert to bytes */
caps->sprom_offset /= 8;
}
return (0);
}