drivers/bcma/sprom.c - third_party/kernel - Git at Google


            
            /*

            
             * Broadcom specific AMBA

            
             * SPROM reading

            
             *

            
             * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>

            
             *

            
             * 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>


            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 control 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,

            
            		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, size_t words)

            
            {

            
            	int word;

            
            	u8 crc = 0xFF;


            	for (word = 0; word < words - 1; word++) {

            
            		crc = bcma_crc8(crc, sprom[word] & 0x00FF);

            
            		crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);

            
            	}

            
            	crc = bcma_crc8(crc, sprom[words - 1] & 0x00FF);

            
            	crc ^= 0xFF;


            	return crc;

            
            }


            static int bcma_sprom_check_crc(const u16 *sprom, size_t words)

            
            {

            
            	u8 crc;

            
            	u8 expected_crc;

            
            	u16 tmp;


            	crc = bcma_sprom_crc(sprom, words);

            
            	tmp = sprom[words - 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(struct bcma_bus *bus, const u16 *sprom,

            
            			    size_t words)

            
            {

            
            	u16 revision;

            
            	int err;


            	err = bcma_sprom_check_crc(sprom, words);

            
            	if (err)

            
            		return err;


            	revision = sprom[words - 1] & SSB_SPROM_REVISION_REV;

            
            	if (revision < 8 || revision > 11) {

            
            		pr_err("Unsupported SPROM revision: %d\n", revision);

            
            		return -ENOENT;

            
            	}


            	bus->sprom.revision = revision;

            
            	bcma_debug(bus, "Found SPROM revision %d\n", revision);


            	return 0;

            
            }


            /**************************************************

            
             * SPROM extraction.

            
             **************************************************/


            #define SPOFF(offset)	((offset) / sizeof(u16))


            #define SPEX(_field, _offset, _mask, _shift)	\

            
            	bus->sprom._field = ((sprom[SPOFF(_offset)] & (_mask)) >> (_shift))


            #define SPEX32(_field, _offset, _mask, _shift)	\

            
            	bus->sprom._field = ((((u32)sprom[SPOFF((_offset)+2)] << 16 | \

            
            				sprom[SPOFF(_offset)]) & (_mask)) >> (_shift))


            #define SPEX_ARRAY8(_field, _offset, _mask, _shift)	\

            
            	do {	\

            
            		SPEX(_field[0], _offset +  0, _mask, _shift);	\

            
            		SPEX(_field[1], _offset +  2, _mask, _shift);	\

            
            		SPEX(_field[2], _offset +  4, _mask, _shift);	\

            
            		SPEX(_field[3], _offset +  6, _mask, _shift);	\

            
            		SPEX(_field[4], _offset +  8, _mask, _shift);	\

            
            		SPEX(_field[5], _offset + 10, _mask, _shift);	\

            
            		SPEX(_field[6], _offset + 12, _mask, _shift);	\

            
            		SPEX(_field[7], _offset + 14, _mask, _shift);	\

            
            	} while (0)


            static s8 sprom_extract_antgain(const u16 *in, u16 offset, u16 mask, u16 shift)

            
            {

            
            	u16 v;

            
            	u8 gain;


            	v = in[SPOFF(offset)];

            
            	gain = (v & mask) >> shift;

            
            	if (gain == 0xFF) {

            
            		gain = 8; /* If unset use 2dBm */

            
            	} else {

            
            		/* Q5.2 Fractional part is stored in 0xC0 */

            
            		gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);

            
            	}


            	return (s8)gain;

            
            }


            static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)

            
            {

            
            	u16 v, o;

            
            	int i;

            
            	static const 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));


            	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(board_type, SSB_SPROM1_SPID, ~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(alpha2[0], SSB_SPROM8_CCODE, 0xff00, 8);

            
            	SPEX(alpha2[1], SSB_SPROM8_CCODE, 0x00ff, 0);


            	/* Extract core's power 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);


            	SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,

            
            	     SSB_SPROM8_ANTAVAIL_A_SHIFT);

            
            	SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,

            
            	     SSB_SPROM8_ANTAVAIL_BG_SHIFT);

            
            	SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);

            
            	SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,

            
            	     SSB_SPROM8_ITSSI_BG_SHIFT);

            
            	SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);

            
            	SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,

            
            	     SSB_SPROM8_ITSSI_A_SHIFT);

            
            	SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);

            
            	SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,

            
            	     SSB_SPROM8_MAXP_AL_SHIFT);

            
            	SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);

            
            	SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,

            
            	     SSB_SPROM8_GPIOA_P1_SHIFT);

            
            	SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);

            
            	SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,

            
            	     SSB_SPROM8_GPIOB_P3_SHIFT);

            
            	SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);

            
            	SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,

            
            	     SSB_SPROM8_TRI5G_SHIFT);

            
            	SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);

            
            	SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,

            
            	     SSB_SPROM8_TRI5GH_SHIFT);

            
            	SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G,

            
            	     SSB_SPROM8_RXPO2G_SHIFT);

            
            	SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,

            
            	     SSB_SPROM8_RXPO5G_SHIFT);

            
            	SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);

            
            	SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,

            
            	     SSB_SPROM8_RSSISMC2G_SHIFT);

            
            	SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,

            
            	     SSB_SPROM8_RSSISAV2G_SHIFT);

            
            	SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,

            
            	     SSB_SPROM8_BXA2G_SHIFT);

            
            	SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);

            
            	SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,

            
            	     SSB_SPROM8_RSSISMC5G_SHIFT);

            
            	SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,

            
            	     SSB_SPROM8_RSSISAV5G_SHIFT);

            
            	SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,

            
            	     SSB_SPROM8_BXA5G_SHIFT);


            	SPEX(pa0b0, SSB_SPROM8_PA0B0, ~0, 0);

            
            	SPEX(pa0b1, SSB_SPROM8_PA0B1, ~0, 0);

            
            	SPEX(pa0b2, SSB_SPROM8_PA0B2, ~0, 0);

            
            	SPEX(pa1b0, SSB_SPROM8_PA1B0, ~0, 0);

            
            	SPEX(pa1b1, SSB_SPROM8_PA1B1, ~0, 0);

            
            	SPEX(pa1b2, SSB_SPROM8_PA1B2, ~0, 0);

            
            	SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, ~0, 0);

            
            	SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, ~0, 0);

            
            	SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, ~0, 0);

            
            	SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, ~0, 0);

            
            	SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, ~0, 0);

            
            	SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, ~0, 0);

            
            	SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, ~0, 0);

            
            	SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, ~0, 0);

            
            	SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, ~0, 0);

            
            	SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, ~0, 0);

            
            	SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, ~0, 0);


            	/* Extract the antenna gain values. */

            
            	bus->sprom.antenna_gain.a0 = sprom_extract_antgain(sprom,

            
            							   SSB_SPROM8_AGAIN01,

            
            							   SSB_SPROM8_AGAIN0,

            
            							   SSB_SPROM8_AGAIN0_SHIFT);

            
            	bus->sprom.antenna_gain.a1 = sprom_extract_antgain(sprom,

            
            							   SSB_SPROM8_AGAIN01,

            
            							   SSB_SPROM8_AGAIN1,

            
            							   SSB_SPROM8_AGAIN1_SHIFT);

            
            	bus->sprom.antenna_gain.a2 = sprom_extract_antgain(sprom,

            
            							   SSB_SPROM8_AGAIN23,

            
            							   SSB_SPROM8_AGAIN2,

            
            							   SSB_SPROM8_AGAIN2_SHIFT);

            
            	bus->sprom.antenna_gain.a3 = sprom_extract_antgain(sprom,

            
            							   SSB_SPROM8_AGAIN23,

            
            							   SSB_SPROM8_AGAIN3,

            
            							   SSB_SPROM8_AGAIN3_SHIFT);


            	SPEX(leddc_on_time, SSB_SPROM8_LEDDC, SSB_SPROM8_LEDDC_ON,

            
            	     SSB_SPROM8_LEDDC_ON_SHIFT);

            
            	SPEX(leddc_off_time, SSB_SPROM8_LEDDC, SSB_SPROM8_LEDDC_OFF,

            
            	     SSB_SPROM8_LEDDC_OFF_SHIFT);


            	SPEX(txchain, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_TXCHAIN,

            
            	     SSB_SPROM8_TXRXC_TXCHAIN_SHIFT);

            
            	SPEX(rxchain, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_RXCHAIN,

            
            	     SSB_SPROM8_TXRXC_RXCHAIN_SHIFT);

            
            	SPEX(antswitch, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_SWITCH,

            
            	     SSB_SPROM8_TXRXC_SWITCH_SHIFT);


            	SPEX(opo, SSB_SPROM8_OFDM2GPO, 0x00ff, 0);


            	SPEX_ARRAY8(mcs2gpo, SSB_SPROM8_2G_MCSPO, ~0, 0);

            
            	SPEX_ARRAY8(mcs5gpo, SSB_SPROM8_5G_MCSPO, ~0, 0);

            
            	SPEX_ARRAY8(mcs5glpo, SSB_SPROM8_5GL_MCSPO, ~0, 0);

            
            	SPEX_ARRAY8(mcs5ghpo, SSB_SPROM8_5GH_MCSPO, ~0, 0);


            	SPEX(rawtempsense, SSB_SPROM8_RAWTS, SSB_SPROM8_RAWTS_RAWTEMP,

            
            	     SSB_SPROM8_RAWTS_RAWTEMP_SHIFT);

            
            	SPEX(measpower, SSB_SPROM8_RAWTS, SSB_SPROM8_RAWTS_MEASPOWER,

            
            	     SSB_SPROM8_RAWTS_MEASPOWER_SHIFT);

            
            	SPEX(tempsense_slope, SSB_SPROM8_OPT_CORRX,

            
            	     SSB_SPROM8_OPT_CORRX_TEMP_SLOPE,

            
            	     SSB_SPROM8_OPT_CORRX_TEMP_SLOPE_SHIFT);

            
            	SPEX(tempcorrx, SSB_SPROM8_OPT_CORRX, SSB_SPROM8_OPT_CORRX_TEMPCORRX,

            
            	     SSB_SPROM8_OPT_CORRX_TEMPCORRX_SHIFT);

            
            	SPEX(tempsense_option, SSB_SPROM8_OPT_CORRX,

            
            	     SSB_SPROM8_OPT_CORRX_TEMP_OPTION,

            
            	     SSB_SPROM8_OPT_CORRX_TEMP_OPTION_SHIFT);

            
            	SPEX(freqoffset_corr, SSB_SPROM8_HWIQ_IQSWP,

            
            	     SSB_SPROM8_HWIQ_IQSWP_FREQ_CORR,

            
            	     SSB_SPROM8_HWIQ_IQSWP_FREQ_CORR_SHIFT);

            
            	SPEX(iqcal_swp_dis, SSB_SPROM8_HWIQ_IQSWP,

            
            	     SSB_SPROM8_HWIQ_IQSWP_IQCAL_SWP,

            
            	     SSB_SPROM8_HWIQ_IQSWP_IQCAL_SWP_SHIFT);

            
            	SPEX(hw_iqcal_en, SSB_SPROM8_HWIQ_IQSWP, SSB_SPROM8_HWIQ_IQSWP_HW_IQCAL,

            
            	     SSB_SPROM8_HWIQ_IQSWP_HW_IQCAL_SHIFT);


            	SPEX(bw40po, SSB_SPROM8_BW40PO, ~0, 0);

            
            	SPEX(cddpo, SSB_SPROM8_CDDPO, ~0, 0);

            
            	SPEX(stbcpo, SSB_SPROM8_STBCPO, ~0, 0);

            
            	SPEX(bwduppo, SSB_SPROM8_BWDUPPO, ~0, 0);


            	SPEX(tempthresh, SSB_SPROM8_THERMAL, SSB_SPROM8_THERMAL_TRESH,

            
            	     SSB_SPROM8_THERMAL_TRESH_SHIFT);

            
            	SPEX(tempoffset, SSB_SPROM8_THERMAL, SSB_SPROM8_THERMAL_OFFSET,

            
            	     SSB_SPROM8_THERMAL_OFFSET_SHIFT);

            
            	SPEX(phycal_tempdelta, SSB_SPROM8_TEMPDELTA,

            
            	     SSB_SPROM8_TEMPDELTA_PHYCAL,

            
            	     SSB_SPROM8_TEMPDELTA_PHYCAL_SHIFT);

            
            	SPEX(temps_period, SSB_SPROM8_TEMPDELTA, SSB_SPROM8_TEMPDELTA_PERIOD,

            
            	     SSB_SPROM8_TEMPDELTA_PERIOD_SHIFT);

            
            	SPEX(temps_hysteresis, SSB_SPROM8_TEMPDELTA,

            
            	     SSB_SPROM8_TEMPDELTA_HYSTERESIS,

            
            	     SSB_SPROM8_TEMPDELTA_HYSTERESIS_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 BCMA_CHIP_ID_BCM4313:

            
            		present_mask = BCMA_CC_CHIPST_4313_SPROM_PRESENT;

            
            		break;


            	case BCMA_CHIP_ID_BCM4331:

            
            		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 BCMA_CHIP_ID_BCM4313:

            
            		present = chip_status & BCMA_CC_CHIPST_4313_OTP_PRESENT;

            
            		break;


            	case BCMA_CHIP_ID_BCM4331:

            
            		present = chip_status & BCMA_CC_CHIPST_4331_OTP_PRESENT;

            
            		break;

            
            	case BCMA_CHIP_ID_BCM43142:

            
            	case BCMA_CHIP_ID_BCM43224:

            
            	case BCMA_CHIP_ID_BCM43225:

            
            		/* for these chips OTP is always available */

            
            		present = true;

            
            		break;

            
            	case BCMA_CHIP_ID_BCM43131:

            
            	case BCMA_CHIP_ID_BCM43217:

            
            	case BCMA_CHIP_ID_BCM43227:

            
            	case BCMA_CHIP_ID_BCM43228:

            
            	case BCMA_CHIP_ID_BCM43428:

            
            		present = chip_status & BCMA_CC_CHIPST_43228_OTP_PRESENT;

            
            		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;

            
            	static const size_t sprom_sizes[] = {

            
            		SSB_SPROMSIZE_WORDS_R4,

            
            		SSB_SPROMSIZE_WORDS_R10,

            
            		SSB_SPROMSIZE_WORDS_R11,

            
            	};

            
            	int i, 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;

            
            		}

            
            	}


            	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 ||

            
            	    bus->chipinfo.id == BCMA_CHIP_ID_BCM43431)

            
            		bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);


            	bcma_debug(bus, "SPROM offset 0x%x\n", offset);

            
            	for (i = 0; i < ARRAY_SIZE(sprom_sizes); i++) {

            
            		size_t words = sprom_sizes[i];


            		sprom = kcalloc(words, sizeof(u16), GFP_KERNEL);

            
            		if (!sprom)

            
            			return -ENOMEM;


            		bcma_sprom_read(bus, offset, sprom, words);

            
            		err = bcma_sprom_valid(bus, sprom, words);

            
            		if (!err)

            
            			break;


            		kfree(sprom);

            
            	}


            	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 ||

            
            	    bus->chipinfo.id == BCMA_CHIP_ID_BCM43431)

            
            		bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);


            	if (err) {

            
            		bcma_warn(bus, "Invalid SPROM read from the PCIe card, trying to use fallback SPROM\n");

            
            		err = bcma_fill_sprom_with_fallback(bus, &bus->sprom);

            
            	} else {

            
            		bcma_sprom_extract_r8(bus, sprom);

            
            		kfree(sprom);

            
            	}


            	return err;

            
            }
	/*
	* Broadcom specific AMBA
	* SPROM reading
	*
	* Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
	*
	* 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>

	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 control 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,
	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, size_t words)
	{
	int word;
	u8 crc = 0xFF;

	for (word = 0; word < words - 1; word++) {
	crc = bcma_crc8(crc, sprom[word] & 0x00FF);
	crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);
	}
	crc = bcma_crc8(crc, sprom[words - 1] & 0x00FF);
	crc ^= 0xFF;

	return crc;
	}

	static int bcma_sprom_check_crc(const u16 *sprom, size_t words)
	{
	u8 crc;
	u8 expected_crc;
	u16 tmp;

	crc = bcma_sprom_crc(sprom, words);
	tmp = sprom[words - 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(struct bcma_bus bus, const u16 sprom,
	size_t words)
	{
	u16 revision;
	int err;

	err = bcma_sprom_check_crc(sprom, words);
	if (err)
	return err;

	revision = sprom[words - 1] & SSB_SPROM_REVISION_REV;
	if (revision < 8 \|\| revision > 11) {
	pr_err("Unsupported SPROM revision: %d\n", revision);
	return -ENOENT;
	}

	bus->sprom.revision = revision;
	bcma_debug(bus, "Found SPROM revision %d\n", revision);

	return 0;
	}

	/**************************************************
	* SPROM extraction.
	**************************************************/

	#define SPOFF(offset) ((offset) / sizeof(u16))

	#define SPEX(_field, _offset, _mask, _shift) \
	bus->sprom._field = ((sprom[SPOFF(_offset)] & (_mask)) >> (_shift))

	#define SPEX32(_field, _offset, _mask, _shift) \
	bus->sprom._field = ((((u32)sprom[SPOFF((_offset)+2)] << 16 \| \
	sprom[SPOFF(_offset)]) & (_mask)) >> (_shift))

	#define SPEX_ARRAY8(_field, _offset, _mask, _shift) \
	do { \
	SPEX(_field[0], _offset + 0, _mask, _shift); \
	SPEX(_field[1], _offset + 2, _mask, _shift); \
	SPEX(_field[2], _offset + 4, _mask, _shift); \
	SPEX(_field[3], _offset + 6, _mask, _shift); \
	SPEX(_field[4], _offset + 8, _mask, _shift); \
	SPEX(_field[5], _offset + 10, _mask, _shift); \
	SPEX(_field[6], _offset + 12, _mask, _shift); \
	SPEX(_field[7], _offset + 14, _mask, _shift); \
	} while (0)

	static s8 sprom_extract_antgain(const u16 *in, u16 offset, u16 mask, u16 shift)
	{
	u16 v;
	u8 gain;

	v = in[SPOFF(offset)];
	gain = (v & mask) >> shift;
	if (gain == 0xFF) {
	gain = 8; /* If unset use 2dBm */
	} else {
	/* Q5.2 Fractional part is stored in 0xC0 */
	gain = ((gain & 0xC0) >> 6) \| ((gain & 0x3F) << 2);
	}

	return (s8)gain;
	}

	static void bcma_sprom_extract_r8(struct bcma_bus bus, const u16 sprom)
	{
	u16 v, o;
	int i;
	static const 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));

	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(board_type, SSB_SPROM1_SPID, ~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(alpha2[0], SSB_SPROM8_CCODE, 0xff00, 8);
	SPEX(alpha2[1], SSB_SPROM8_CCODE, 0x00ff, 0);

	/* Extract core's power 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);

	SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
	SSB_SPROM8_ANTAVAIL_A_SHIFT);
	SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
	SSB_SPROM8_ANTAVAIL_BG_SHIFT);
	SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
	SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
	SSB_SPROM8_ITSSI_BG_SHIFT);
	SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
	SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
	SSB_SPROM8_ITSSI_A_SHIFT);
	SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
	SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
	SSB_SPROM8_MAXP_AL_SHIFT);
	SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
	SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
	SSB_SPROM8_GPIOA_P1_SHIFT);
	SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
	SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
	SSB_SPROM8_GPIOB_P3_SHIFT);
	SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
	SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
	SSB_SPROM8_TRI5G_SHIFT);
	SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
	SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
	SSB_SPROM8_TRI5GH_SHIFT);
	SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G,
	SSB_SPROM8_RXPO2G_SHIFT);
	SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
	SSB_SPROM8_RXPO5G_SHIFT);
	SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
	SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
	SSB_SPROM8_RSSISMC2G_SHIFT);
	SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
	SSB_SPROM8_RSSISAV2G_SHIFT);
	SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
	SSB_SPROM8_BXA2G_SHIFT);
	SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
	SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
	SSB_SPROM8_RSSISMC5G_SHIFT);
	SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
	SSB_SPROM8_RSSISAV5G_SHIFT);
	SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
	SSB_SPROM8_BXA5G_SHIFT);

	SPEX(pa0b0, SSB_SPROM8_PA0B0, ~0, 0);
	SPEX(pa0b1, SSB_SPROM8_PA0B1, ~0, 0);
	SPEX(pa0b2, SSB_SPROM8_PA0B2, ~0, 0);
	SPEX(pa1b0, SSB_SPROM8_PA1B0, ~0, 0);
	SPEX(pa1b1, SSB_SPROM8_PA1B1, ~0, 0);
	SPEX(pa1b2, SSB_SPROM8_PA1B2, ~0, 0);
	SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, ~0, 0);
	SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, ~0, 0);
	SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, ~0, 0);
	SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, ~0, 0);
	SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, ~0, 0);
	SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, ~0, 0);
	SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, ~0, 0);
	SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, ~0, 0);
	SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, ~0, 0);
	SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, ~0, 0);
	SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, ~0, 0);

	/* Extract the antenna gain values. */
	bus->sprom.antenna_gain.a0 = sprom_extract_antgain(sprom,
	SSB_SPROM8_AGAIN01,
	SSB_SPROM8_AGAIN0,
	SSB_SPROM8_AGAIN0_SHIFT);
	bus->sprom.antenna_gain.a1 = sprom_extract_antgain(sprom,
	SSB_SPROM8_AGAIN01,
	SSB_SPROM8_AGAIN1,
	SSB_SPROM8_AGAIN1_SHIFT);
	bus->sprom.antenna_gain.a2 = sprom_extract_antgain(sprom,
	SSB_SPROM8_AGAIN23,
	SSB_SPROM8_AGAIN2,
	SSB_SPROM8_AGAIN2_SHIFT);
	bus->sprom.antenna_gain.a3 = sprom_extract_antgain(sprom,
	SSB_SPROM8_AGAIN23,
	SSB_SPROM8_AGAIN3,
	SSB_SPROM8_AGAIN3_SHIFT);

	SPEX(leddc_on_time, SSB_SPROM8_LEDDC, SSB_SPROM8_LEDDC_ON,
	SSB_SPROM8_LEDDC_ON_SHIFT);
	SPEX(leddc_off_time, SSB_SPROM8_LEDDC, SSB_SPROM8_LEDDC_OFF,
	SSB_SPROM8_LEDDC_OFF_SHIFT);

	SPEX(txchain, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_TXCHAIN,
	SSB_SPROM8_TXRXC_TXCHAIN_SHIFT);
	SPEX(rxchain, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_RXCHAIN,
	SSB_SPROM8_TXRXC_RXCHAIN_SHIFT);
	SPEX(antswitch, SSB_SPROM8_TXRXC, SSB_SPROM8_TXRXC_SWITCH,
	SSB_SPROM8_TXRXC_SWITCH_SHIFT);

	SPEX(opo, SSB_SPROM8_OFDM2GPO, 0x00ff, 0);

	SPEX_ARRAY8(mcs2gpo, SSB_SPROM8_2G_MCSPO, ~0, 0);
	SPEX_ARRAY8(mcs5gpo, SSB_SPROM8_5G_MCSPO, ~0, 0);
	SPEX_ARRAY8(mcs5glpo, SSB_SPROM8_5GL_MCSPO, ~0, 0);
	SPEX_ARRAY8(mcs5ghpo, SSB_SPROM8_5GH_MCSPO, ~0, 0);

	SPEX(rawtempsense, SSB_SPROM8_RAWTS, SSB_SPROM8_RAWTS_RAWTEMP,
	SSB_SPROM8_RAWTS_RAWTEMP_SHIFT);
	SPEX(measpower, SSB_SPROM8_RAWTS, SSB_SPROM8_RAWTS_MEASPOWER,
	SSB_SPROM8_RAWTS_MEASPOWER_SHIFT);
	SPEX(tempsense_slope, SSB_SPROM8_OPT_CORRX,
	SSB_SPROM8_OPT_CORRX_TEMP_SLOPE,
	SSB_SPROM8_OPT_CORRX_TEMP_SLOPE_SHIFT);
	SPEX(tempcorrx, SSB_SPROM8_OPT_CORRX, SSB_SPROM8_OPT_CORRX_TEMPCORRX,
	SSB_SPROM8_OPT_CORRX_TEMPCORRX_SHIFT);
	SPEX(tempsense_option, SSB_SPROM8_OPT_CORRX,
	SSB_SPROM8_OPT_CORRX_TEMP_OPTION,
	SSB_SPROM8_OPT_CORRX_TEMP_OPTION_SHIFT);
	SPEX(freqoffset_corr, SSB_SPROM8_HWIQ_IQSWP,
	SSB_SPROM8_HWIQ_IQSWP_FREQ_CORR,
	SSB_SPROM8_HWIQ_IQSWP_FREQ_CORR_SHIFT);
	SPEX(iqcal_swp_dis, SSB_SPROM8_HWIQ_IQSWP,
	SSB_SPROM8_HWIQ_IQSWP_IQCAL_SWP,
	SSB_SPROM8_HWIQ_IQSWP_IQCAL_SWP_SHIFT);
	SPEX(hw_iqcal_en, SSB_SPROM8_HWIQ_IQSWP, SSB_SPROM8_HWIQ_IQSWP_HW_IQCAL,
	SSB_SPROM8_HWIQ_IQSWP_HW_IQCAL_SHIFT);

	SPEX(bw40po, SSB_SPROM8_BW40PO, ~0, 0);
	SPEX(cddpo, SSB_SPROM8_CDDPO, ~0, 0);
	SPEX(stbcpo, SSB_SPROM8_STBCPO, ~0, 0);
	SPEX(bwduppo, SSB_SPROM8_BWDUPPO, ~0, 0);

	SPEX(tempthresh, SSB_SPROM8_THERMAL, SSB_SPROM8_THERMAL_TRESH,
	SSB_SPROM8_THERMAL_TRESH_SHIFT);
	SPEX(tempoffset, SSB_SPROM8_THERMAL, SSB_SPROM8_THERMAL_OFFSET,
	SSB_SPROM8_THERMAL_OFFSET_SHIFT);
	SPEX(phycal_tempdelta, SSB_SPROM8_TEMPDELTA,
	SSB_SPROM8_TEMPDELTA_PHYCAL,
	SSB_SPROM8_TEMPDELTA_PHYCAL_SHIFT);
	SPEX(temps_period, SSB_SPROM8_TEMPDELTA, SSB_SPROM8_TEMPDELTA_PERIOD,
	SSB_SPROM8_TEMPDELTA_PERIOD_SHIFT);
	SPEX(temps_hysteresis, SSB_SPROM8_TEMPDELTA,
	SSB_SPROM8_TEMPDELTA_HYSTERESIS,
	SSB_SPROM8_TEMPDELTA_HYSTERESIS_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 BCMA_CHIP_ID_BCM4313:
	present_mask = BCMA_CC_CHIPST_4313_SPROM_PRESENT;
	break;

	case BCMA_CHIP_ID_BCM4331:
	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 BCMA_CHIP_ID_BCM4313:
	present = chip_status & BCMA_CC_CHIPST_4313_OTP_PRESENT;
	break;

	case BCMA_CHIP_ID_BCM4331:
	present = chip_status & BCMA_CC_CHIPST_4331_OTP_PRESENT;
	break;
	case BCMA_CHIP_ID_BCM43142:
	case BCMA_CHIP_ID_BCM43224:
	case BCMA_CHIP_ID_BCM43225:
	/* for these chips OTP is always available */
	present = true;
	break;
	case BCMA_CHIP_ID_BCM43131:
	case BCMA_CHIP_ID_BCM43217:
	case BCMA_CHIP_ID_BCM43227:
	case BCMA_CHIP_ID_BCM43228:
	case BCMA_CHIP_ID_BCM43428:
	present = chip_status & BCMA_CC_CHIPST_43228_OTP_PRESENT;
	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;
	static const size_t sprom_sizes[] = {
	SSB_SPROMSIZE_WORDS_R4,
	SSB_SPROMSIZE_WORDS_R10,
	SSB_SPROMSIZE_WORDS_R11,
	};
	int i, 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;
	}
	}

	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 \|\|
	bus->chipinfo.id == BCMA_CHIP_ID_BCM43431)
	bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);

	bcma_debug(bus, "SPROM offset 0x%x\n", offset);
	for (i = 0; i < ARRAY_SIZE(sprom_sizes); i++) {
	size_t words = sprom_sizes[i];

	sprom = kcalloc(words, sizeof(u16), GFP_KERNEL);
	if (!sprom)
	return -ENOMEM;

	bcma_sprom_read(bus, offset, sprom, words);
	err = bcma_sprom_valid(bus, sprom, words);
	if (!err)
	break;

	kfree(sprom);
	}

	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 \|\|
	bus->chipinfo.id == BCMA_CHIP_ID_BCM43431)
	bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);

	if (err) {
	bcma_warn(bus, "Invalid SPROM read from the PCIe card, trying to use fallback SPROM\n");
	err = bcma_fill_sprom_with_fallback(bus, &bus->sprom);
	} else {
	bcma_sprom_extract_r8(bus, sprom);
	kfree(sprom);
	}

	return err;
	}