fb3967b95c
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
169 lines
4 KiB
C
169 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* NXP ISP1301 USB transceiver driver
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*
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* Copyright (C) 2012 Roland Stigge
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*
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* Author: Roland Stigge <stigge@antcom.de>
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/usb/phy.h>
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#include <linux/usb/isp1301.h>
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#define DRV_NAME "isp1301"
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struct isp1301 {
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struct usb_phy phy;
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struct mutex mutex;
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struct i2c_client *client;
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};
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#define phy_to_isp(p) (container_of((p), struct isp1301, phy))
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static const struct i2c_device_id isp1301_id[] = {
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{ "isp1301", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, isp1301_id);
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static const struct of_device_id isp1301_of_match[] = {
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{.compatible = "nxp,isp1301" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, isp1301_of_match);
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static struct i2c_client *isp1301_i2c_client;
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static int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear)
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{
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return i2c_smbus_write_byte_data(isp->client, reg | clear, value);
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}
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static int isp1301_write(struct isp1301 *isp, u8 reg, u8 value)
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{
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return __isp1301_write(isp, reg, value, 0);
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}
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static int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value)
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{
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return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR);
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}
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static int isp1301_phy_init(struct usb_phy *phy)
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{
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struct isp1301 *isp = phy_to_isp(phy);
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/* Disable transparent UART mode first */
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isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN);
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isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG);
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isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
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isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0);
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isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN
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| MC2_SPD_SUSP_CTRL));
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isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0);
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isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
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isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN
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| OTG1_DP_PULLDOWN));
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isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP
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| OTG1_DP_PULLUP));
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/* mask all interrupts */
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isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0);
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isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0);
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isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0);
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return 0;
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}
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static int isp1301_phy_set_vbus(struct usb_phy *phy, int on)
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{
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struct isp1301 *isp = phy_to_isp(phy);
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if (on)
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isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
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else
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isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
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return 0;
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}
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static int isp1301_probe(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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struct isp1301 *isp;
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struct usb_phy *phy;
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isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL);
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if (!isp)
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return -ENOMEM;
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isp->client = client;
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mutex_init(&isp->mutex);
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phy = &isp->phy;
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phy->dev = &client->dev;
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phy->label = DRV_NAME;
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phy->init = isp1301_phy_init;
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phy->set_vbus = isp1301_phy_set_vbus;
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phy->type = USB_PHY_TYPE_USB2;
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i2c_set_clientdata(client, isp);
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usb_add_phy_dev(phy);
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isp1301_i2c_client = client;
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return 0;
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}
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static int isp1301_remove(struct i2c_client *client)
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{
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struct isp1301 *isp = i2c_get_clientdata(client);
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usb_remove_phy(&isp->phy);
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isp1301_i2c_client = NULL;
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return 0;
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}
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static struct i2c_driver isp1301_driver = {
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.driver = {
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.name = DRV_NAME,
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.of_match_table = isp1301_of_match,
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},
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.probe = isp1301_probe,
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.remove = isp1301_remove,
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.id_table = isp1301_id,
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};
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module_i2c_driver(isp1301_driver);
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static int match(struct device *dev, void *data)
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{
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struct device_node *node = (struct device_node *)data;
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return (dev->of_node == node) &&
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(dev->driver == &isp1301_driver.driver);
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}
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struct i2c_client *isp1301_get_client(struct device_node *node)
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{
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if (node) { /* reference of ISP1301 I2C node via DT */
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struct device *dev = bus_find_device(&i2c_bus_type, NULL,
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node, match);
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if (!dev)
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return NULL;
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return to_i2c_client(dev);
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} else { /* non-DT: only one ISP1301 chip supported */
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return isp1301_i2c_client;
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}
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}
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EXPORT_SYMBOL_GPL(isp1301_get_client);
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MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
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MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver");
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MODULE_LICENSE("GPL");
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