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/*
* Copyright (c) 2013 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
/*
* Platform specific driver functions and data. Through the platform specific
* device data functions can be provided to help the brcmfmac driver to
* operate with the device in combination with the used platform.
*
* Use the platform data in the following (similar) way:
*
*
#include <brcmfmac_platform.h>
static void brcmfmac_power_on(void)
{
}
static void brcmfmac_power_off(void)
{
}
static void brcmfmac_reset(void)
{
}
static struct brcmfmac_sdio_platform_data brcmfmac_sdio_pdata = {
.power_on = brcmfmac_power_on,
.power_off = brcmfmac_power_off,
.reset = brcmfmac_reset
};
static struct platform_device brcmfmac_device = {
.name = BRCMFMAC_SDIO_PDATA_NAME,
.id = PLATFORM_DEVID_NONE,
.dev.platform_data = &brcmfmac_sdio_pdata
};
void __init brcmfmac_init_pdata(void)
{
brcmfmac_sdio_pdata.oob_irq_supported = true;
brcmfmac_sdio_pdata.oob_irq_nr = gpio_to_irq(GPIO_BRCMF_SDIO_OOB);
brcmfmac_sdio_pdata.oob_irq_flags = IORESOURCE_IRQ |
IORESOURCE_IRQ_HIGHLEVEL;
platform_device_register(&brcmfmac_device);
}
*
*
* 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.
*
* Explanation of the platform_data fields:
*
* 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
*
* power_on: This function is called by the brcmfmac 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 device can be powered down or otherwise be reset.
* So if an actual power_off is not supported but reset is then reset the device
* when this function gets called. This can be particularly useful for low power
* devices. If there is no use-case for this function (either power-down or
* reset) then provide NULL.
*
* 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.
*/
#define BRCMFMAC_SDIO_PDATA_NAME "brcmfmac_sdio"
struct brcmfmac_sdio_platform_data {
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 (*power_on)(void);
void (*power_off)(void);
void (*reset)(void);
};
#endif /* _LINUX_BRCMFMAC_PLATFORM_H */
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