/*
 *  Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 */

#ifndef _ATH_FLASH_H
#define _ATH_FLASH_H

#define ATH_SPI_CE_LOW		0x60000
#define ATH_SPI_CE_HIGH		0x60100

#define ATH_SPI_CD_LOW		0x70000
#define ATH_SPI_CD_HIGH		0x70100

/* commands for 32MB and above */
#define ATH_SPI_CMD_WREAR       0xC5
#define ATH_SPI_CMD_RDEAR       0xC8
#define ATH_SPI_CMD_READ        0x03
#define ATH_SPI_CMD_EN4B        0xB7
#define ATH_SPI_CMD_EX4B        0xE9
#define ATH_SPI_CMD_WRDIS       0x04
#define ATH_SPI_CMD_RD_STATUS_2 0x35
#define ATH_SPI_CMD_RD_STATUS_3 0x15

#define ATH_SPI_SECTOR_SIZE	(1024*64)
#define ATH_SPI_PAGE_SIZE	256

#define ATH_FLASH_MAX_BANKS	1

#define display(_x)	ath_reg_wr_nf(0x18040008, (_x))

/*
 * primitives
 */

#define ath_be_msb(_val, __i) (((_val) & (1 << (7 - __i))) >> (7 - __i))

#define ath_spi_bit_banger(_byte)	do {				\
	int _i;								\
	for(_i = 0; _i < 8; _i++) {					\
		ath_reg_wr_nf(ATH_SPI_WRITE,				\
			ATH_SPI_CE_LOW | ath_be_msb(_byte, _i));	\
		ath_reg_wr_nf(ATH_SPI_WRITE,				\
			ATH_SPI_CE_HIGH | ath_be_msb(_byte, _i));	\
	}								\
} while(0)

#define ath_spi_go()	do {				\
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CE_LOW);	\
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_DIS);	\
} while(0);


#define ath_spi_send_addr(__a)	do {			\
	ath_spi_bit_banger(((__a & 0xff0000) >> 16));	\
	ath_spi_bit_banger(((__a & 0x00ff00) >> 8));	\
	ath_spi_bit_banger(__a & 0x0000ff);		\
} while(0);

#define ath_spi_delay_8()	ath_spi_bit_banger(0)
#define ath_spi_done()		ath_reg_wr(ATH_SPI_FS, 0)

#endif /*_ATH_FLASH_H*/