include/atheros.h - uboot/windcharger - Git at Google

 /*
  * vim: tabstop=8 : noexpandtab
  */

 /*
  * Copyright (c) 2013 Qualcomm Atheros, Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #ifndef _ATHEROS_H
 #define _ATHEROS_H

 /*
  * Set everything to zero. The corresponding header will
  * undef and re-define the appropriate ones
  */
 #define is_ar7100()	(0)

 #define is_ar7240()	(0)
 #define is_ar7241()	(0)
 #define is_ar7242()	(0)

 #define is_ar9330()	(0)
 #define is_ar933x()	(0)
 #define is_hornet()	(0)

 #define is_ar934x()	(0)
 #define is_wasp()	(0)

 #define is_qca955x()	(0)
 #define is_sco()	(0)

 #define is_qca953x()	(0)
 #define is_hb()		(0)

 #define is_qca956x()	(0)

 #define ATH_CONSOLE_BAUD	115200

 #define AR7240_REV_1_2		0xc2

 #ifdef CONFIG_ATH_EMULATION
 #define is_emu()	(1)
 #else
 #define is_emu()	(0)
 #endif

 #ifdef CONFIG_F1E_PHY
 #define is_f1e()	1
 #else
 #define is_f1e()	0
 #endif
 #ifdef CONFIG_F2E_PHY
 #define is_f2e()	1
 #else
 #define is_f2e()	0
 #endif
 #ifdef CONFIG_ATHRS16_PHY
 #define is_s16()	1
 #else
 #define is_s16()	0
 #endif

 #ifdef CONFIG_ATHRS17_PHY
 #define is_s17()        1
 #else
 #define is_s17()        0
 #endif

 #ifdef CONFIG_ATHR_8033_PHY
 #define is_ar8033() 1
 #else
 #define is_ar8033() 0
 #endif

 #ifdef CONFIG_VIR_PHY
 #define is_vir_phy()	1
 #else
 #define is_vir_phy() 	0
 #endif

 #ifdef CFG_ATHRS27_PHY
 #define is_s27()        1
 #else
 #define is_s27()        0
 #endif

 #define ath_arch_init_irq() /* nothing */

 #ifndef __ASSEMBLY__

 int ath_uart_freq(void);

 typedef unsigned int ath_reg_t;

 #ifdef COMPRESSED_UBOOT
 #	define prmsg(...)
 #else
 #	define prmsg	printf
 #endif

 #endif /* __ASSEMBLY__ */

 #define ath_reg_rd(_phys)	(*(volatile ath_reg_t *)KSEG1ADDR(_phys))

 #define ath_reg_wr_nf(_phys, _val) \
 	((*(volatile ath_reg_t *)KSEG1ADDR(_phys)) = (_val))

 #define ath_reg_wr(_phys, _val) do {	\
 	ath_reg_wr_nf(_phys, _val);	\
 	ath_reg_rd(_phys);		\
 } while(0)

 #define ath_reg_rmw_set(_reg, _mask)	do {			\
 	ath_reg_wr((_reg), (ath_reg_rd((_reg)) | (_mask)));	\
 	ath_reg_rd((_reg));					\
 } while(0)

 #define ath_reg_rmw_clear(_reg, _mask) do {			\
 	ath_reg_wr((_reg), (ath_reg_rd((_reg)) & ~(_mask)));	\
 	ath_reg_rd((_reg));					\
 } while(0)

 #define ath_uart_rd(y)		ath_reg_rd((ATH_UART_BASE+y))
 #define ath_uart_wr(x, z)	ath_reg_wr((ATH_UART_BASE+x), z)

 #define REG_OFFSET		4

 #define OFS_RCV_BUFFER		(0 * REG_OFFSET)
 #define OFS_TRANS_HOLD		(0 * REG_OFFSET)
 #define OFS_SEND_BUFFER		(0 * REG_OFFSET)
 #define OFS_INTR_ENABLE		(1 * REG_OFFSET)
 #define OFS_INTR_ID		(2 * REG_OFFSET)
 #define OFS_DATA_FORMAT		(3 * REG_OFFSET)
 #define OFS_LINE_CONTROL	(3 * REG_OFFSET)
 #define OFS_MODEM_CONTROL	(4 * REG_OFFSET)
 #define OFS_RS232_OUTPUT	(4 * REG_OFFSET)
 #define OFS_LINE_STATUS		(5 * REG_OFFSET)
 #define OFS_MODEM_STATUS	(6 * REG_OFFSET)
 #define OFS_RS232_INPUT		(6 * REG_OFFSET)
 #define OFS_SCRATCH_PAD		(7 * REG_OFFSET)

 #define OFS_DIVISOR_LSB		(0 * REG_OFFSET)
 #define OFS_DIVISOR_MSB		(1 * REG_OFFSET)

 /*
  * PLL Config for different CPU/DDR/AHB frequencies
  */
 #define CFG_PLL_720_600_200	0x01
 #define CFG_PLL_720_680_240	0x02
 #define CFG_PLL_720_600_240	0x03
 #define CFG_PLL_680_680_226	0x04
 #define CFG_PLL_720_600_300	0x05
 #define CFG_PLL_400_400_200	0x06
 #define CFG_PLL_560_450_220	0x07
 #define CFG_PLL_550_400_200	0x08
 #define CFG_PLL_550_600_200	0x09
 #define CFG_PLL_600_600_200	0x0a
 #define CFG_PLL_750_400_250	0x0b
 #define CFG_PLL_800_400_266	0x0c
 #define CFG_PLL_750_667_250	0x0d
 #define CFG_PLL_800_600_266	0x0e
 #define CFG_PLL_800_667_266	0x0f
 #define CFG_PLL_810_700_270	0x10
 #define CFG_PLL_810_666_270	0x11
 #define CFG_PLL_775_650_258	0x12
 #define CFG_PLL_650_400_200	0x13
 #define CFG_PLL_650_600_200	0x14

 #define UBOOT_SIZE                      (256 * 1024)
 #define PLL_FLASH_ADDR                  (CFG_FLASH_BASE + UBOOT_SIZE)
 #define PLL_CONFIG_VAL_F                (PLL_FLASH_ADDR + CFG_FLASH_SECTOR_SIZE - 0x20)
 #define PLL_MAGIC                        0xaabbccdd
 #define SRIF_PLL_CONFIG_VAL_F           (PLL_CONFIG_VAL_F - 12)
 #define SRIF_PLL_MAGIC                  0x73726966 /* srif */

 #include <config.h>

 #if defined(CONFIG_MACH_AR724x)
 #	include <724x.h>
 #elif defined(CONFIG_MACH_AR933x)
 #	include <933x.h>
 #elif defined(CONFIG_MACH_AR934x)
 #	include <934x.h>
 #elif defined(CONFIG_MACH_QCA955x)
 #	include <955x.h>
 #elif defined(CONFIG_MACH_QCA953x)
 #	include <953x.h>
 #elif defined(CONFIG_MACH_QCA956x)
 #	include <956x.h>
 #else
 #	error "Building U-Boot for unknown device"
 #endif

 #ifndef __ASSEMBLY__

 #define ATH_MEM_SDRAM		1
 #define ATH_MEM_DDR1		2
 #define ATH_MEM_DDR2		3
 /*
  * GPIO Access & Control
  */
 void ath_gpio_init(void);
 void ath_gpio_down(void);
 void ath_gpio_up(void);

 void ath_gpio_irq_init(int);
 /*
  * GPIO Helper Functions
  */
 void ath_gpio_enable_slic(void);

 /* enable UART block, takes away GPIO 10 and 9 */
 void ath_gpio_enable_uart(void);

 /* enable STEREO block, takes away GPIO 11,8,7, and 6 */
 void ath_gpio_enable_stereo(void);

 /* allow CS0/CS1 to be controlled via SPI register, takes away GPIO0/GPIO1 */
 void ath_gpio_enable_spi_cs1_cs0(void);

 /* allow GPIO0/GPIO1 to be used as SCL/SDA for software based i2c */
 void ath_gpio_enable_i2c_on_gpio_0_1(void);

 /*
  * GPIO General Functions
  */
 void ath_gpio_drive_low(unsigned int mask);
 void ath_gpio_drive_high(unsigned int mask);

 unsigned int ath_gpio_float_high_test(unsigned int mask);

 /* Functions to access SPI through software. Example:
  *
  * ath_spi_down(); ---------------------- disable others from accessing SPI bus taking semaphore
  * ath_spi_enable_soft_access(); -------- disable HW control of SPI
  *
  * <board specific chip select routine>
  *
  * <read/write SPI using using custom routine or general purposeflash routines
  * Custom routine may use:
  *
  *	ath_spi_raw_output_u8(unsigned char)
  *	ath_spi_raw_output_u32(unsigned int)
  *	ath_spi_raw_input_u32()
  *
  * General purpose flash routines:
  *	ath_spi_flash_read_page(unsigned int addr, unsigned char *data, int len);
  *	ath_spi_flash_write_page(unsigned int addr, unsigned char *data, int len);
  *	ath_spi_flash_sector_erase(unsigned int addr);
  * >
  *
  * <board specific chip deselect routine>
  *
  * ath_spi_disable_soft_acess(); ------- enable HW control of SPI bus
  * ath_spi_up(); ----------------------- enable others to access SPI bus releasing semaphore
  */
 void ath_spi_init(void);
 void ath_spi_down(void);
 void ath_spi_up(void);

 static inline void
 ath_spi_enable_soft_access(void)
 {
 	ath_reg_wr_nf(ATH_SPI_FS, 1);
 }

 static inline void
 ath_spi_disable_soft_access(void)
 {
 	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_DIS);
 	ath_reg_wr_nf(ATH_SPI_FS, 0);
 }

 void ath_spi_raw_output_u8(unsigned char val);
 void ath_spi_raw_output_u32(unsigned int val);
 unsigned int ath_spi_raw_input_u8(void);
 unsigned int ath_spi_raw_input_u32(void);

 void ath_spi_flash_read_page(unsigned int addr, unsigned char *data, int len);
 void ath_spi_flash_write_page(unsigned int addr, unsigned char *data, int len);
 void ath_spi_flash_sector_erase(unsigned int addr);

 /*
  * Allow access to cs0-2 when GPIO Function enables cs0-2 through SPI register.
  */
 static inline void
 ath_spi_enable_cs0(void)
 {
 	unsigned int cs;
 	ath_spi_down();
 	ath_spi_enable_soft_access();
 	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
 	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_0 | cs);
 }

 static inline void
 ath_spi_enable_cs1(void)
 {
 	unsigned int cs;
 #if defined(CONFIG_MACH_AR934x)	|| \
     defined(CONFIG_MACH_QCA955x)
 	ath_spi_down();
 	ath_spi_init();
 	ath_spi_enable_soft_access();
 	cs = ath_reg_rd(ATH_SPI_WRITE) & ATH_SPI_CS_DIS;
 	ath_reg_wr_nf(ATH_SPI_WRITE, cs | ATH_SPI_CLK_HIGH);
 	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
 	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 | cs | ATH_SPI_CLK_HIGH);
 	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 | cs);
 #else
 	ath_spi_down();
 	ath_spi_enable_soft_access();
 	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
 	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 | cs);
 #endif
 }

 static inline void
 ath_spi_disable_cs(void)
 {
 	unsigned int cs = ath_reg_rd(ATH_SPI_WRITE) | ATH_SPI_CS_DIS;
 	ath_reg_wr_nf(ATH_SPI_WRITE, cs);
 	ath_spi_disable_soft_access();
 	ath_spi_up();
 }

 /*
  * Example usage to access BOOT flash
  */
 static inline void
 ath_spi_flash_cs0_sector_erase(unsigned int addr)
 {
 	ath_spi_enable_cs0();
 	ath_spi_flash_sector_erase(addr);
 	ath_spi_disable_cs();
 }

 static inline void
 ath_spi_flash_cs0_write_page(unsigned int addr, unsigned char *data, int len)
 {
 	ath_spi_enable_cs0();
 	ath_spi_flash_write_page(addr, data, len);
 	ath_spi_disable_cs();
 }

 #endif /* __ASSEMBLY__ */


 #endif /* _ATHEROS_H */
	/*
	* vim: tabstop=8 : noexpandtab
	*/

	/*
	* Copyright (c) 2013 Qualcomm Atheros, Inc.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#ifndef _ATHEROS_H
	#define _ATHEROS_H

	/*
	* Set everything to zero. The corresponding header will
	* undef and re-define the appropriate ones
	*/
	#define is_ar7100() (0)

	#define is_ar7240() (0)
	#define is_ar7241() (0)
	#define is_ar7242() (0)

	#define is_ar9330() (0)
	#define is_ar933x() (0)
	#define is_hornet() (0)

	#define is_ar934x() (0)
	#define is_wasp() (0)

	#define is_qca955x() (0)
	#define is_sco() (0)

	#define is_qca953x() (0)
	#define is_hb() (0)

	#define is_qca956x() (0)

	#define ATH_CONSOLE_BAUD 115200

	#define AR7240_REV_1_2 0xc2

	#ifdef CONFIG_ATH_EMULATION
	#define is_emu() (1)
	#else
	#define is_emu() (0)
	#endif

	#ifdef CONFIG_F1E_PHY
	#define is_f1e() 1
	#else
	#define is_f1e() 0
	#endif
	#ifdef CONFIG_F2E_PHY
	#define is_f2e() 1
	#else
	#define is_f2e() 0
	#endif
	#ifdef CONFIG_ATHRS16_PHY
	#define is_s16() 1
	#else
	#define is_s16() 0
	#endif

	#ifdef CONFIG_ATHRS17_PHY
	#define is_s17() 1
	#else
	#define is_s17() 0
	#endif

	#ifdef CONFIG_ATHR_8033_PHY
	#define is_ar8033() 1
	#else
	#define is_ar8033() 0
	#endif

	#ifdef CONFIG_VIR_PHY
	#define is_vir_phy() 1
	#else
	#define is_vir_phy() 0
	#endif

	#ifdef CFG_ATHRS27_PHY
	#define is_s27() 1
	#else
	#define is_s27() 0
	#endif

	#define ath_arch_init_irq() /* nothing */

	#ifndef __ASSEMBLY__

	int ath_uart_freq(void);

	typedef unsigned int ath_reg_t;

	#ifdef COMPRESSED_UBOOT
	# define prmsg(...)
	#else
	# define prmsg printf
	#endif

	#endif /* __ASSEMBLY__ */

	#define ath_reg_rd(_phys) ((volatile ath_reg_t )KSEG1ADDR(_phys))

	#define ath_reg_wr_nf(_phys, _val) \
	(((volatile ath_reg_t )KSEG1ADDR(_phys)) = (_val))

	#define ath_reg_wr(_phys, _val) do { \
	ath_reg_wr_nf(_phys, _val); \
	ath_reg_rd(_phys); \
	} while(0)

	#define ath_reg_rmw_set(_reg, _mask) do { \
	ath_reg_wr((_reg), (ath_reg_rd((_reg)) \| (_mask))); \
	ath_reg_rd((_reg)); \
	} while(0)

	#define ath_reg_rmw_clear(_reg, _mask) do { \
	ath_reg_wr((_reg), (ath_reg_rd((_reg)) & ~(_mask))); \
	ath_reg_rd((_reg)); \
	} while(0)

	#define ath_uart_rd(y) ath_reg_rd((ATH_UART_BASE+y))
	#define ath_uart_wr(x, z) ath_reg_wr((ATH_UART_BASE+x), z)

	#define REG_OFFSET 4

	#define OFS_RCV_BUFFER (0 * REG_OFFSET)
	#define OFS_TRANS_HOLD (0 * REG_OFFSET)
	#define OFS_SEND_BUFFER (0 * REG_OFFSET)
	#define OFS_INTR_ENABLE (1 * REG_OFFSET)
	#define OFS_INTR_ID (2 * REG_OFFSET)
	#define OFS_DATA_FORMAT (3 * REG_OFFSET)
	#define OFS_LINE_CONTROL (3 * REG_OFFSET)
	#define OFS_MODEM_CONTROL (4 * REG_OFFSET)
	#define OFS_RS232_OUTPUT (4 * REG_OFFSET)
	#define OFS_LINE_STATUS (5 * REG_OFFSET)
	#define OFS_MODEM_STATUS (6 * REG_OFFSET)
	#define OFS_RS232_INPUT (6 * REG_OFFSET)
	#define OFS_SCRATCH_PAD (7 * REG_OFFSET)

	#define OFS_DIVISOR_LSB (0 * REG_OFFSET)
	#define OFS_DIVISOR_MSB (1 * REG_OFFSET)

	/*
	* PLL Config for different CPU/DDR/AHB frequencies
	*/
	#define CFG_PLL_720_600_200 0x01
	#define CFG_PLL_720_680_240 0x02
	#define CFG_PLL_720_600_240 0x03
	#define CFG_PLL_680_680_226 0x04
	#define CFG_PLL_720_600_300 0x05
	#define CFG_PLL_400_400_200 0x06
	#define CFG_PLL_560_450_220 0x07
	#define CFG_PLL_550_400_200 0x08
	#define CFG_PLL_550_600_200 0x09
	#define CFG_PLL_600_600_200 0x0a
	#define CFG_PLL_750_400_250 0x0b
	#define CFG_PLL_800_400_266 0x0c
	#define CFG_PLL_750_667_250 0x0d
	#define CFG_PLL_800_600_266 0x0e
	#define CFG_PLL_800_667_266 0x0f
	#define CFG_PLL_810_700_270 0x10
	#define CFG_PLL_810_666_270 0x11
	#define CFG_PLL_775_650_258 0x12
	#define CFG_PLL_650_400_200 0x13
	#define CFG_PLL_650_600_200 0x14

	#define UBOOT_SIZE (256 * 1024)
	#define PLL_FLASH_ADDR (CFG_FLASH_BASE + UBOOT_SIZE)
	#define PLL_CONFIG_VAL_F (PLL_FLASH_ADDR + CFG_FLASH_SECTOR_SIZE - 0x20)
	#define PLL_MAGIC 0xaabbccdd
	#define SRIF_PLL_CONFIG_VAL_F (PLL_CONFIG_VAL_F - 12)
	#define SRIF_PLL_MAGIC 0x73726966 /* srif */

	#include <config.h>

	#if defined(CONFIG_MACH_AR724x)
	# include <724x.h>
	#elif defined(CONFIG_MACH_AR933x)
	# include <933x.h>
	#elif defined(CONFIG_MACH_AR934x)
	# include <934x.h>
	#elif defined(CONFIG_MACH_QCA955x)
	# include <955x.h>
	#elif defined(CONFIG_MACH_QCA953x)
	# include <953x.h>
	#elif defined(CONFIG_MACH_QCA956x)
	# include <956x.h>
	#else
	# error "Building U-Boot for unknown device"
	#endif

	#ifndef __ASSEMBLY__

	#define ATH_MEM_SDRAM 1
	#define ATH_MEM_DDR1 2
	#define ATH_MEM_DDR2 3
	/*
	* GPIO Access & Control
	*/
	void ath_gpio_init(void);
	void ath_gpio_down(void);
	void ath_gpio_up(void);

	void ath_gpio_irq_init(int);
	/*
	* GPIO Helper Functions
	*/
	void ath_gpio_enable_slic(void);

	/* enable UART block, takes away GPIO 10 and 9 */
	void ath_gpio_enable_uart(void);

	/* enable STEREO block, takes away GPIO 11,8,7, and 6 */
	void ath_gpio_enable_stereo(void);

	/* allow CS0/CS1 to be controlled via SPI register, takes away GPIO0/GPIO1 */
	void ath_gpio_enable_spi_cs1_cs0(void);

	/* allow GPIO0/GPIO1 to be used as SCL/SDA for software based i2c */
	void ath_gpio_enable_i2c_on_gpio_0_1(void);

	/*
	* GPIO General Functions
	*/
	void ath_gpio_drive_low(unsigned int mask);
	void ath_gpio_drive_high(unsigned int mask);

	unsigned int ath_gpio_float_high_test(unsigned int mask);

	/* Functions to access SPI through software. Example:
	*
	* ath_spi_down(); ---------------------- disable others from accessing SPI bus taking semaphore
	* ath_spi_enable_soft_access(); -------- disable HW control of SPI
	*
	* <board specific chip select routine>
	*
	* <read/write SPI using using custom routine or general purposeflash routines
	* Custom routine may use:
	*
	* ath_spi_raw_output_u8(unsigned char)
	* ath_spi_raw_output_u32(unsigned int)
	* ath_spi_raw_input_u32()
	*
	* General purpose flash routines:
	* ath_spi_flash_read_page(unsigned int addr, unsigned char *data, int len);
	* ath_spi_flash_write_page(unsigned int addr, unsigned char *data, int len);
	* ath_spi_flash_sector_erase(unsigned int addr);
	* >
	*
	* <board specific chip deselect routine>
	*
	* ath_spi_disable_soft_acess(); ------- enable HW control of SPI bus
	* ath_spi_up(); ----------------------- enable others to access SPI bus releasing semaphore
	*/
	void ath_spi_init(void);
	void ath_spi_down(void);
	void ath_spi_up(void);

	static inline void
	ath_spi_enable_soft_access(void)
	{
	ath_reg_wr_nf(ATH_SPI_FS, 1);
	}

	static inline void
	ath_spi_disable_soft_access(void)
	{
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_DIS);
	ath_reg_wr_nf(ATH_SPI_FS, 0);
	}

	void ath_spi_raw_output_u8(unsigned char val);
	void ath_spi_raw_output_u32(unsigned int val);
	unsigned int ath_spi_raw_input_u8(void);
	unsigned int ath_spi_raw_input_u32(void);

	void ath_spi_flash_read_page(unsigned int addr, unsigned char *data, int len);
	void ath_spi_flash_write_page(unsigned int addr, unsigned char *data, int len);
	void ath_spi_flash_sector_erase(unsigned int addr);

	/*
	* Allow access to cs0-2 when GPIO Function enables cs0-2 through SPI register.
	*/
	static inline void
	ath_spi_enable_cs0(void)
	{
	unsigned int cs;
	ath_spi_down();
	ath_spi_enable_soft_access();
	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_0 \| cs);
	}

	static inline void
	ath_spi_enable_cs1(void)
	{
	unsigned int cs;
	#if defined(CONFIG_MACH_AR934x) \|\| \
	defined(CONFIG_MACH_QCA955x)
	ath_spi_down();
	ath_spi_init();
	ath_spi_enable_soft_access();
	cs = ath_reg_rd(ATH_SPI_WRITE) & ATH_SPI_CS_DIS;
	ath_reg_wr_nf(ATH_SPI_WRITE, cs \| ATH_SPI_CLK_HIGH);
	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 \| cs \| ATH_SPI_CLK_HIGH);
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 \| cs);
	#else
	ath_spi_down();
	ath_spi_enable_soft_access();
	cs = ath_reg_rd(ATH_SPI_WRITE) & ~ATH_SPI_CS_DIS;
	ath_reg_wr_nf(ATH_SPI_WRITE, ATH_SPI_CS_ENABLE_1 \| cs);
	#endif
	}

	static inline void
	ath_spi_disable_cs(void)
	{
	unsigned int cs = ath_reg_rd(ATH_SPI_WRITE) \| ATH_SPI_CS_DIS;
	ath_reg_wr_nf(ATH_SPI_WRITE, cs);
	ath_spi_disable_soft_access();
	ath_spi_up();
	}

	/*
	* Example usage to access BOOT flash
	*/
	static inline void
	ath_spi_flash_cs0_sector_erase(unsigned int addr)
	{
	ath_spi_enable_cs0();
	ath_spi_flash_sector_erase(addr);
	ath_spi_disable_cs();
	}

	static inline void
	ath_spi_flash_cs0_write_page(unsigned int addr, unsigned char *data, int len)
	{
	ath_spi_enable_cs0();
	ath_spi_flash_write_page(addr, data, len);
	ath_spi_disable_cs();
	}

	#endif /* __ASSEMBLY__ */


	#endif /* _ATHEROS_H */