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greybus: Greybus SD/MMC host driver

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Need to add specifics, but this should be enough to hook up to the mmc
framework.
This commit is contained in:
Greg Kroah-Hartman 2014-08-11 17:27:22 +08:00
parent 776f136c75
commit 83ddaaab01
2 changed files with 89 additions and 0 deletions
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1
drivers/staging/greybus/Makefile
View File

@ -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

88
drivers/staging/greybus/sdio-gb.c Normal file
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@ -0,0 +1,88 @@
/*
* 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>");