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/*
* cpcap_usb - CPCAP USB transceiver, talking to OMAP OTG controller
*
* Copyright (C) 2004-2007 Texas Instruments
* Copyright (C) 2008 Nokia Corporation
* Copyright (C) 2009 Google, Inc.
* Contact: Erik Gilling <konkers@android.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Based on twl4030-usb.c
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include <linux/spi/cpcap.h>
#include <linux/spi/cpcap-regbits.h>
enum linkstat {
USB_LINK_UNKNOWN = 0,
USB_LINK_NONE,
USB_LINK_VBUS,
USB_LINK_ID,
};
struct cpcap_usb {
//struct otg_transceiver otg;
struct usb_phy phy;
struct device *dev;
struct cpcap_device *cpcap;
/* for vbus reporting with irqs disabled */
spinlock_t lock;
int irq;
u8 linkstat;
u8 asleep;
bool irq_enabled;
};
static int cpcap_set_suspend(struct usb_phy *x, int suspend)
{
return 0;
}
static int cpcap_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
{
struct usb_phy *phy = otg->phy;
otg->gadget = gadget;
if (!gadget)
phy->state = OTG_STATE_UNDEFINED;
return 0;
}
static int cpcap_set_host(struct usb_otg *otg, struct usb_bus *host)
{
struct usb_phy *phy = otg->phy;
otg->host = host;
if (!host)
phy->state = OTG_STATE_UNDEFINED;
return 0;
}
static int cpcap_usb_setup(struct cpcap_usb *cpcap)
{
unsigned short mask;
unsigned short value;
int r;
r = cpcap_regacc_read(cpcap->cpcap, CPCAP_REG_INTS2, &value);
if (value & CPCAP_BIT_SE1_S)
mask = CPCAP_BIT_VBUSEN_SPI | CPCAP_BIT_VBUSPU_SPI |
CPCAP_BIT_SUSPEND_SPI | CPCAP_BIT_ULPI_SPI_SEL;
else
mask = CPCAP_BIT_VBUSEN_SPI | CPCAP_BIT_VBUSPU_SPI |
CPCAP_BIT_DMPD_SPI | CPCAP_BIT_DPPD_SPI |
CPCAP_BIT_SUSPEND_SPI | CPCAP_BIT_PU_SPI |
CPCAP_BIT_ULPI_SPI_SEL;
r = cpcap_regacc_write(cpcap->cpcap, CPCAP_REG_USBC3, 0x0, mask);
if (r < 0) {
dev_err(cpcap->dev,
"Can't disable SPI control of CPCAP transceiver\n");
return r;
}
return 0;
}
static int cpcap_usb_set_vbus(struct usb_otg *otg, bool enabled)
{
return 0;
}
static int cpcap_usb_start_srp(struct usb_otg *otg)
{
return 0;
}
static int cpcap_usb_probe(struct platform_device *pdev)
{
struct cpcap_usb *cpcap;
struct usb_otg *otg;
int err;
cpcap = devm_kzalloc(&pdev->dev, sizeof(*cpcap), GFP_KERNEL);
if (!cpcap) {
dev_err(&pdev->dev, "unable to allocate memory for cpcap PHY\n");
return -ENOMEM;
}
otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
if (!otg) {
dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
return -ENOMEM;
}
cpcap->dev = &pdev->dev;
cpcap->phy.dev = cpcap->dev;
cpcap->phy.label = "cpcap";
cpcap->phy.set_suspend = cpcap_set_suspend;
cpcap->phy.otg = otg;
cpcap->phy.type = USB_PHY_TYPE_USB2;
cpcap->asleep = 1;
cpcap->cpcap = pdev->dev.platform_data;
otg->set_host = cpcap_set_host;
otg->set_peripheral = cpcap_set_peripheral;
otg->set_vbus = cpcap_usb_set_vbus;
otg->start_srp = cpcap_usb_start_srp;
otg->phy = &cpcap->phy;
spin_lock_init(&cpcap->lock);
usb_add_phy_dev(&cpcap->phy);
platform_set_drvdata(pdev, cpcap);
err = cpcap_usb_setup(cpcap);
if (err < 0)
goto err0;
return 0;
err0:
usb_remove_phy(&cpcap->phy);
devm_kfree(&pdev->dev,cpcap);
devm_kfree(&pdev->dev,otg);
return err;
}
static int cpcap_usb_remove(struct platform_device *pdev)
{
struct cpcap_usb *cpcap = platform_get_drvdata(pdev);
devm_kfree(&pdev->dev,cpcap);
return 0;
}
static struct platform_driver cpcap_usb_driver = {
.probe = cpcap_usb_probe,
.remove = (cpcap_usb_remove),
.driver = {
.name = "cpcap_usb",
.owner = THIS_MODULE,
},
};
static int __init cpcap_usb_init(void)
{
return cpcap_driver_register(&cpcap_usb_driver);
}
subsys_initcall(cpcap_usb_init);
static void __exit cpcap_usb_exit(void)
{
platform_driver_unregister(&cpcap_usb_driver);
}
module_exit(cpcap_usb_exit);
MODULE_ALIAS("platform:cpcap_usb");
MODULE_DESCRIPTION("CPCAP USB transceiver driver");
MODULE_LICENSE("GPL");
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