linux-imx
Public
Source
committed 3c313161353x
bcma_warn(bus, "Invalid SPROM read from the PCIe card, trying to use fallback SPROM\n");/* * Broadcom specific AMBA * SPROM reading * * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de> * * Licensed under the GNU/GPL. See COPYING for details. */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; bcma_debug(bus, "Using SPROM revision %d provided by platform.\n", bus->sprom.revision); return 0;fail: bcma_warn(bus, "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, size_t words){ int i; for (i = 0; i < words; 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,