phy-isp1301.c revision 790d3a5ab6e36fb06e99339afe35ecdec4d3b2cb
18b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge/* 28b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * NXP ISP1301 USB transceiver driver 38b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * 48b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * Copyright (C) 2012 Roland Stigge 58b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * 68b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * Author: Roland Stigge <stigge@antcom.de> 78b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * 88b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * This program is free software; you can redistribute it and/or modify 98b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * it under the terms of the GNU General Public License version 2 as 108b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge * published by the Free Software Foundation. 118b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge */ 128b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 138b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge#include <linux/module.h> 14790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi#include <linux/mutex.h> 158b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge#include <linux/i2c.h> 16790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi#include <linux/usb/phy.h> 178b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 188b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge#define DRV_NAME "isp1301" 198b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 20790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbistruct isp1301 { 21790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct usb_phy phy; 22790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct mutex mutex; 23790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 24790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct i2c_client *client; 25790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi}; 26790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 278b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic const struct i2c_device_id isp1301_id[] = { 288b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge { "isp1301", 0 }, 298b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge { } 308b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge}; 318b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 328b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic struct i2c_client *isp1301_i2c_client; 338b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 348b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int isp1301_probe(struct i2c_client *client, 358b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge const struct i2c_device_id *i2c_id) 368b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 37790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct isp1301 *isp; 38790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct usb_phy *phy; 39790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 40790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL); 41790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi if (!isp) 42790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi return -ENOMEM; 43790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 44790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp->client = client; 45790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi mutex_init(&isp->mutex); 46790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 47790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy = &isp->phy; 48790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy->label = DRV_NAME; 49790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy->type = USB_PHY_TYPE_USB2; 50790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 51790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi i2c_set_clientdata(client, isp); 52790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi usb_add_phy_dev(phy); 53790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 548b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge isp1301_i2c_client = client; 55790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 568b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return 0; 578b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 588b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 598b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int isp1301_remove(struct i2c_client *client) 608b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 61790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct isp1301 *isp = i2c_get_clientdata(client); 62790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 63790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi usb_remove_phy(&isp->phy); 64790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp1301_i2c_client = NULL; 65790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 668b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return 0; 678b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 688b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 698b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic struct i2c_driver isp1301_driver = { 708b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .driver = { 718b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .name = DRV_NAME, 728b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge }, 738b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .probe = isp1301_probe, 748b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .remove = isp1301_remove, 758b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .id_table = isp1301_id, 768b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge}; 778b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 788b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggemodule_i2c_driver(isp1301_driver); 798b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 808b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int match(struct device *dev, void *data) 818b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 828b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge struct device_node *node = (struct device_node *)data; 838b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return (dev->of_node == node) && 848b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge (dev->driver == &isp1301_driver.driver); 858b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 868b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 878b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestruct i2c_client *isp1301_get_client(struct device_node *node) 888b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 898b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge if (node) { /* reference of ISP1301 I2C node via DT */ 908b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge struct device *dev = bus_find_device(&i2c_bus_type, NULL, 918b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge node, match); 928b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge if (!dev) 938b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return NULL; 948b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return to_i2c_client(dev); 958b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge } else { /* non-DT: only one ISP1301 chip supported */ 968b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return isp1301_i2c_client; 978b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge } 988b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 998b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeEXPORT_SYMBOL_GPL(isp1301_get_client); 1008b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1018b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); 1028b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver"); 1038b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_LICENSE("GPL"); 104