Commit 83ddaaab authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

greybus: Greybus SD/MMC host driver 

Need to add specifics, but this should be enough to hook up to the mmc
framework.
parent 776f136c

drivers/staging/greybus/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ greybus-y := core.o 


obj-m += greybus.o

obj-m += i2c-gb.o

obj-m += sdio-gb.o



KERNELVER		?= $(shell uname -r)

KERNELDIR 		?= /lib/modules/$(KERNELVER)/build

drivers/staging/greybus/sdio-gb.c

0 → 100644
+88 −0
Original line number Diff line number Diff line 
/*

 * SD/MMC Greybus driver.

 *

 * Copyright 2014 Google Inc.

 *

 * Released under the GPLv2 only.

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/mmc/host.h>

#include "greybus.h"



struct sd_gb_host {

	struct mmc_host	*mmc;

	struct mmc_request *mrq;

	// FIXME - some lock?

};



static const struct greybus_device_id id_table[] = {

	{ GREYBUS_DEVICE(0x43, 0x43) },	/* make shit up */

	{ },	/* terminating NULL entry */

};



static void gb_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)

{

	// FIXME - do something here...

}



static void gb_sd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)

{

	// FIXME - do something here...

}



static int gb_sd_get_ro(struct mmc_host *mmc)

{

	// FIXME - do something here...

	return 0;

}



static const struct mmc_host_ops gb_sd_ops = {

	.request	= gb_sd_request,

	.set_ios	= gb_sd_set_ios,

	.get_ro		= gb_sd_get_ro,

};



static int sd_gb_probe(struct greybus_device *gdev, const struct greybus_device_id *id)

{

	struct mmc_host *mmc;

	struct sd_gb_host *host;



	mmc = mmc_alloc_host(sizeof(struct sd_gb_host), &gdev->dev);

	if (!mmc)

		return -ENOMEM;



	host = mmc_priv(mmc);

	host->mmc = mmc;



	mmc->ops = &gb_sd_ops;

	// FIXME - set up size limits we can handle.



	greybus_set_drvdata(gdev, host);

	return 0;

}



static void sd_gb_disconnect(struct greybus_device *gdev)

{

	struct mmc_host *mmc;

	struct sd_gb_host *host;



	host = greybus_get_drvdata(gdev);

	mmc = host->mmc;



	mmc_remove_host(mmc);

	mmc_free_host(mmc);

}



static struct greybus_driver sd_gb_driver = {

	.probe =	sd_gb_probe,

	.disconnect =	sd_gb_disconnect,

	.id_table =	id_table,

};



module_greybus_driver(sd_gb_driver);

MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Greybus SD/MMC Host driver");

MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");