![Chanwoo Choi](/assets/img/avatar_default.png)
This patch uses the resource-managed extcon API for extcon_register_notifier() and replaces the deprecated extcon API as following: - extcon_get_cable_state_() -> extcon_get_state() Cc: linux-omap@vger.kernel.org Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
159 lines
4.1 KiB
C
159 lines
4.1 KiB
C
/*
|
|
* OMAP OTG controller driver
|
|
*
|
|
* Based on code from tahvo-usb.c and isp1301_omap.c drivers.
|
|
*
|
|
* Copyright (C) 2005-2006 Nokia Corporation
|
|
* Copyright (C) 2004 Texas Instruments
|
|
* Copyright (C) 2004 David Brownell
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General
|
|
* Public License. See the file "COPYING" in the main directory of this
|
|
* archive for more details.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/err.h>
|
|
#include <linux/extcon.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/platform_data/usb-omap1.h>
|
|
|
|
struct otg_device {
|
|
void __iomem *base;
|
|
bool id;
|
|
bool vbus;
|
|
struct extcon_dev *extcon;
|
|
struct notifier_block vbus_nb;
|
|
struct notifier_block id_nb;
|
|
};
|
|
|
|
#define OMAP_OTG_CTRL 0x0c
|
|
#define OMAP_OTG_ASESSVLD (1 << 20)
|
|
#define OMAP_OTG_BSESSEND (1 << 19)
|
|
#define OMAP_OTG_BSESSVLD (1 << 18)
|
|
#define OMAP_OTG_VBUSVLD (1 << 17)
|
|
#define OMAP_OTG_ID (1 << 16)
|
|
#define OMAP_OTG_XCEIV_OUTPUTS \
|
|
(OMAP_OTG_ASESSVLD | OMAP_OTG_BSESSEND | OMAP_OTG_BSESSVLD | \
|
|
OMAP_OTG_VBUSVLD | OMAP_OTG_ID)
|
|
|
|
static void omap_otg_ctrl(struct otg_device *otg_dev, u32 outputs)
|
|
{
|
|
u32 l;
|
|
|
|
l = readl(otg_dev->base + OMAP_OTG_CTRL);
|
|
l &= ~OMAP_OTG_XCEIV_OUTPUTS;
|
|
l |= outputs;
|
|
writel(l, otg_dev->base + OMAP_OTG_CTRL);
|
|
}
|
|
|
|
static void omap_otg_set_mode(struct otg_device *otg_dev)
|
|
{
|
|
if (!otg_dev->id && otg_dev->vbus)
|
|
/* Set B-session valid. */
|
|
omap_otg_ctrl(otg_dev, OMAP_OTG_ID | OMAP_OTG_BSESSVLD);
|
|
else if (otg_dev->vbus)
|
|
/* Set A-session valid. */
|
|
omap_otg_ctrl(otg_dev, OMAP_OTG_ASESSVLD);
|
|
else if (!otg_dev->id)
|
|
/* Set B-session end to indicate no VBUS. */
|
|
omap_otg_ctrl(otg_dev, OMAP_OTG_ID | OMAP_OTG_BSESSEND);
|
|
}
|
|
|
|
static int omap_otg_id_notifier(struct notifier_block *nb,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct otg_device *otg_dev = container_of(nb, struct otg_device, id_nb);
|
|
|
|
otg_dev->id = event;
|
|
omap_otg_set_mode(otg_dev);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int omap_otg_vbus_notifier(struct notifier_block *nb,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct otg_device *otg_dev = container_of(nb, struct otg_device,
|
|
vbus_nb);
|
|
|
|
otg_dev->vbus = event;
|
|
omap_otg_set_mode(otg_dev);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int omap_otg_probe(struct platform_device *pdev)
|
|
{
|
|
const struct omap_usb_config *config = pdev->dev.platform_data;
|
|
struct otg_device *otg_dev;
|
|
struct extcon_dev *extcon;
|
|
int ret;
|
|
u32 rev;
|
|
|
|
if (!config || !config->extcon)
|
|
return -ENODEV;
|
|
|
|
extcon = extcon_get_extcon_dev(config->extcon);
|
|
if (!extcon)
|
|
return -EPROBE_DEFER;
|
|
|
|
otg_dev = devm_kzalloc(&pdev->dev, sizeof(*otg_dev), GFP_KERNEL);
|
|
if (!otg_dev)
|
|
return -ENOMEM;
|
|
|
|
otg_dev->base = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]);
|
|
if (IS_ERR(otg_dev->base))
|
|
return PTR_ERR(otg_dev->base);
|
|
|
|
otg_dev->extcon = extcon;
|
|
otg_dev->id_nb.notifier_call = omap_otg_id_notifier;
|
|
otg_dev->vbus_nb.notifier_call = omap_otg_vbus_notifier;
|
|
|
|
ret = devm_extcon_register_notifier(&pdev->dev, extcon,
|
|
EXTCON_USB_HOST, &otg_dev->id_nb);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = devm_extcon_register_notifier(&pdev->dev, extcon,
|
|
EXTCON_USB, &otg_dev->vbus_nb);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
otg_dev->id = extcon_get_state(extcon, EXTCON_USB_HOST);
|
|
otg_dev->vbus = extcon_get_state(extcon, EXTCON_USB);
|
|
omap_otg_set_mode(otg_dev);
|
|
|
|
rev = readl(otg_dev->base);
|
|
|
|
dev_info(&pdev->dev,
|
|
"OMAP USB OTG controller rev %d.%d (%s, id=%d, vbus=%d)\n",
|
|
(rev >> 4) & 0xf, rev & 0xf, config->extcon, otg_dev->id,
|
|
otg_dev->vbus);
|
|
|
|
platform_set_drvdata(pdev, otg_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap_otg_driver = {
|
|
.probe = omap_otg_probe,
|
|
.driver = {
|
|
.name = "omap_otg",
|
|
},
|
|
};
|
|
module_platform_driver(omap_otg_driver);
|
|
|
|
MODULE_DESCRIPTION("OMAP USB OTG controller driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
|