159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* NXP ISP1301 USB transceiver driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 Roland Stigge
|
||
|
|
*
|
||
|
|
* Author: Roland Stigge <stigge@antcom.de>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/mutex.h>
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/usb/phy.h>
|
||
|
|
#include <linux/usb/isp1301.h>
|
||
|
|
|
||
|
|
#define DRV_NAME "isp1301"
|
||
|
|
|
||
|
|
struct isp1301 {
|
||
|
|
struct usb_phy phy;
|
||
|
|
struct mutex mutex;
|
||
|
|
|
||
|
|
struct i2c_client *client;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define phy_to_isp(p) (container_of((p), struct isp1301, phy))
|
||
|
|
|
||
|
|
static const struct i2c_device_id isp1301_id[] = {
|
||
|
|
{ "isp1301", 0 },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(i2c, isp1301_id);
|
||
|
|
|
||
|
|
static const struct of_device_id isp1301_of_match[] = {
|
||
|
|
{.compatible = "nxp,isp1301" },
|
||
|
|
{ },
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, isp1301_of_match);
|
||
|
|
|
||
|
|
static struct i2c_client *isp1301_i2c_client;
|
||
|
|
|
||
|
|
static int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear)
|
||
|
|
{
|
||
|
|
return i2c_smbus_write_byte_data(isp->client, reg | clear, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isp1301_write(struct isp1301 *isp, u8 reg, u8 value)
|
||
|
|
{
|
||
|
|
return __isp1301_write(isp, reg, value, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value)
|
||
|
|
{
|
||
|
|
return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isp1301_phy_init(struct usb_phy *phy)
|
||
|
|
{
|
||
|
|
struct isp1301 *isp = phy_to_isp(phy);
|
||
|
|
|
||
|
|
/* Disable transparent UART mode first */
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN);
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG);
|
||
|
|
isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0);
|
||
|
|
isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN
|
||
|
|
| MC2_SPD_SUSP_CTRL));
|
||
|
|
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0);
|
||
|
|
isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
|
||
|
|
isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN
|
||
|
|
| OTG1_DP_PULLDOWN));
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP
|
||
|
|
| OTG1_DP_PULLUP));
|
||
|
|
|
||
|
|
/* mask all interrupts */
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0);
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0);
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isp1301_phy_set_vbus(struct usb_phy *phy, int on)
|
||
|
|
{
|
||
|
|
struct isp1301 *isp = phy_to_isp(phy);
|
||
|
|
|
||
|
|
if (on)
|
||
|
|
isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
|
||
|
|
else
|
||
|
|
isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isp1301_probe(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct isp1301 *isp;
|
||
|
|
struct usb_phy *phy;
|
||
|
|
|
||
|
|
isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL);
|
||
|
|
if (!isp)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
isp->client = client;
|
||
|
|
mutex_init(&isp->mutex);
|
||
|
|
|
||
|
|
phy = &isp->phy;
|
||
|
|
phy->dev = &client->dev;
|
||
|
|
phy->label = DRV_NAME;
|
||
|
|
phy->init = isp1301_phy_init;
|
||
|
|
phy->set_vbus = isp1301_phy_set_vbus;
|
||
|
|
phy->type = USB_PHY_TYPE_USB2;
|
||
|
|
|
||
|
|
i2c_set_clientdata(client, isp);
|
||
|
|
usb_add_phy_dev(phy);
|
||
|
|
|
||
|
|
isp1301_i2c_client = client;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void isp1301_remove(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct isp1301 *isp = i2c_get_clientdata(client);
|
||
|
|
|
||
|
|
usb_remove_phy(&isp->phy);
|
||
|
|
isp1301_i2c_client = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct i2c_driver isp1301_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = DRV_NAME,
|
||
|
|
.of_match_table = isp1301_of_match,
|
||
|
|
},
|
||
|
|
.probe_new = isp1301_probe,
|
||
|
|
.remove = isp1301_remove,
|
||
|
|
.id_table = isp1301_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_i2c_driver(isp1301_driver);
|
||
|
|
|
||
|
|
struct i2c_client *isp1301_get_client(struct device_node *node)
|
||
|
|
{
|
||
|
|
struct i2c_client *client;
|
||
|
|
|
||
|
|
/* reference of ISP1301 I2C node via DT */
|
||
|
|
client = of_find_i2c_device_by_node(node);
|
||
|
|
if (client)
|
||
|
|
return client;
|
||
|
|
|
||
|
|
/* non-DT: only one ISP1301 chip supported */
|
||
|
|
return isp1301_i2c_client;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(isp1301_get_client);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
|
||
|
|
MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver");
|
||
|
|
MODULE_LICENSE("GPL");
|