xref: /openbmc/linux/include/linux/platform_data/brcmfmac.h (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)

/*
 * Copyright (c) 201 Broadcom Corporation
 *
 * 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 _LINUX_BRCMFMAC_PLATFORM_H
#define _LINUX_BRCMFMAC_PLATFORM_H


#define BRCMFMAC_PDATA_NAME		"brcmfmac"

#define BRCMFMAC_COUNTRY_BUF_SZ		4


/*
 * Platform specific driver functions and data. Through the platform specific
 * device data functions and data can be provided to help the brcmfmac driver to
 * operate with the device in combination with the used platform.
 */


/**
 * Note: the brcmfmac can be loaded as module or be statically built-in into
 * the kernel. If built-in then do note that it uses module_init (and
 * module_exit) routines which equal device_initcall. So if you intend to
 * create a module with the platform specific data for the brcmfmac and have
 * it built-in to the kernel then use a higher initcall then device_initcall
 * (see init.h). If this is not done then brcmfmac will load without problems
 * but will not pickup the platform data.
 *
 * When the driver does not "detect" platform driver data then it will continue
 * without reporting anything and just assume there is no data needed. Which is
 * probably true for most platforms.
 */

/**
 * enum brcmf_bus_type - Bus type identifier. Currently SDIO, USB and PCIE are
 *			 supported.
 */
enum brcmf_bus_type {
	BRCMF_BUSTYPE_SDIO,
	BRCMF_BUSTYPE_USB,
	BRCMF_BUSTYPE_PCIE
};


/**
 * struct brcmfmac_sdio_pd - SDIO Device specific platform data.
 *
 * @txglomsz:		SDIO txglom size. Use 0 if default of driver is to be
 *			used.
 * @drive_strength:	is the preferred drive_strength to be used for the SDIO
 *			pins. If 0 then a default value will be used. This is
 *			the target drive strength, the exact drive strength
 *			which will be used depends on the capabilities of the
 *			device.
 * @oob_irq_supported:	does the board have support for OOB interrupts. SDIO
 *			in-band interrupts are relatively slow and for having
 *			less overhead on interrupt processing an out of band
 *			interrupt can be used. If the HW supports this then
 *			enable this by setting this field to true and configure
 *			the oob related fields.
 * @oob_irq_nr,
 * @oob_irq_flags:	the OOB interrupt information. The values are used for
 *			registering the irq using request_irq function.
 * @broken_sg_support:	flag for broken sg list support of SDIO host controller.
 *			Set this to true if the SDIO host controller has higher
 *			align requirement than 32 bytes for each scatterlist
 *			item.
 * @sd_head_align:	alignment requirement for start of data buffer.
 * @sd_sgentry_align:	length alignment requirement for each sg entry.
 * @reset:		This function can get called if the device communication
 *			broke down. This functionality is particularly useful in
 *			case of SDIO type devices. It is possible to reset a
 *			dongle via sdio data interface, but it requires that
 *			this is fully functional. This function is chip/module
 *			specific and this function should return only after the
 *			complete reset has completed.
 */
struct brcmfmac_sdio_pd {
	int		txglomsz;
	unsigned int	drive_strength;
	bool		oob_irq_supported;
	unsigned int	oob_irq_nr;
	unsigned long	oob_irq_flags;
	bool		broken_sg_support;
	unsigned short	sd_head_align;
	unsigned short	sd_sgentry_align;
	void		(*reset)(void);
};

/**
 * struct brcmfmac_pd_cc_entry - Struct for translating user space country code
 *				 (iso3166) to firmware country code and
 *				 revision.
 *
 * @iso3166:	iso3166 alpha 2 country code string.
 * @cc:		firmware country code string.
 * @rev:	firmware country code revision.
 */
struct brcmfmac_pd_cc_entry {
	char	iso3166[BRCMFMAC_COUNTRY_BUF_SZ];
	char	cc[BRCMFMAC_COUNTRY_BUF_SZ];
	s32	rev;
};

/**
 * struct brcmfmac_pd_cc - Struct for translating country codes as set by user
 *			   space to a country code and rev which can be used by
 *			   firmware.
 *
 * @table_size:	number of entries in table (> 0)
 * @table:	array of 1 or more elements with translation information.
 */
struct brcmfmac_pd_cc {
	int				table_size;
	struct brcmfmac_pd_cc_entry	table[];
};

/**
 * struct brcmfmac_pd_device - Device specific platform data. (id/rev/bus_type)
 *			       is the unique identifier of the device.
 *
 * @id:			ID of the device for which this data is. In case of SDIO
 *			or PCIE this is the chipid as identified by chip.c In
 *			case of USB this is the chipid as identified by the
 *			device query.
 * @rev:		chip revision, see id.
 * @bus_type:		The type of bus. Some chipid/rev exist for different bus
 *			types. Each bus type has its own set of settings.
 * @feature_disable:	Bitmask of features to disable (override), See feature.c
 *			in brcmfmac for details.
 * @country_codes:	If available, pointer to struct for translating country
 *			codes.
 * @bus:		Bus specific (union) device settings. Currently only
 *			SDIO.
 */
struct brcmfmac_pd_device {
	unsigned int		id;
	unsigned int		rev;
	enum brcmf_bus_type	bus_type;
	unsigned int		feature_disable;
	struct brcmfmac_pd_cc	*country_codes;
	union {
		struct brcmfmac_sdio_pd sdio;
	} bus;
};

/**
 * struct brcmfmac_platform_data - BRCMFMAC specific platform data.
 *
 * @power_on:	This function is called by the brcmfmac driver when the module
 *		gets loaded. This can be particularly useful for low power
 *		devices. The platform spcific routine may for example decide to
 *		power up the complete device. If there is no use-case for this
 *		function then provide NULL.
 * @power_off:	This function is called by the brcmfmac when the module gets
 *		unloaded. At this point the devices can be powered down or
 *		otherwise be reset. So if an actual power_off is not supported
 *		but reset is supported by the devices then reset the devices
 *		when this function gets called. This can be particularly useful
 *		for low power devices. If there is no use-case for this
 *		function then provide NULL.
 */
struct brcmfmac_platform_data {
	void	(*power_on)(void);
	void	(*power_off)(void);
	char	*fw_alternative_path;
	int	device_count;
	struct brcmfmac_pd_device devices[];
};


#endif /* _LINUX_BRCMFMAC_PLATFORM_H */