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> 17c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi#include <linux/usb/isp1301.h> 188b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 198b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge#define DRV_NAME "isp1301" 208b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 21790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbistruct isp1301 { 22790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct usb_phy phy; 23790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct mutex mutex; 24790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 25790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct i2c_client *client; 26790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi}; 27790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 28c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi#define phy_to_isp(p) (container_of((p), struct isp1301, phy)) 29c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 308b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic const struct i2c_device_id isp1301_id[] = { 318b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge { "isp1301", 0 }, 328b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge { } 338b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge}; 348b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 358b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic struct i2c_client *isp1301_i2c_client; 368b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 37c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbistatic int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear) 38c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi{ 39c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi return i2c_smbus_write_byte_data(isp->client, reg | clear, value); 40c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi} 41c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 42c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbistatic int isp1301_write(struct isp1301 *isp, u8 reg, u8 value) 43c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi{ 44c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi return __isp1301_write(isp, reg, value, 0); 45c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi} 46c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 47c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbistatic int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value) 48c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi{ 49c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR); 50c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi} 51c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 52c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbistatic int isp1301_phy_init(struct usb_phy *phy) 53c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi{ 54c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi struct isp1301 *isp = phy_to_isp(phy); 55c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 56c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi /* Disable transparent UART mode first */ 57c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN); 58c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG); 59c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); 60c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0); 61c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN 62c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi | MC2_SPD_SUSP_CTRL)); 63c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 64c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0); 65c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); 66c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN 67c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi | OTG1_DP_PULLDOWN)); 68c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP 69c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi | OTG1_DP_PULLUP)); 70c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 71c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi /* mask all interrupts */ 72c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0); 73c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0); 74c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0); 75c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 76c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi return 0; 77c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi} 78c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 79c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbistatic int isp1301_phy_set_vbus(struct usb_phy *phy, int on) 80c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi{ 81c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi struct isp1301 *isp = phy_to_isp(phy); 82c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 83c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi if (on) 84c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); 85c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi else 86c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); 87c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 88c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi return 0; 89c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi} 90c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi 918b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int isp1301_probe(struct i2c_client *client, 928b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge const struct i2c_device_id *i2c_id) 938b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 94790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct isp1301 *isp; 95790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct usb_phy *phy; 96790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 97790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL); 98790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi if (!isp) 99790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi return -ENOMEM; 100790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 101790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp->client = client; 102790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi mutex_init(&isp->mutex); 103790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 104790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy = &isp->phy; 1051abd8b3172b701ed626df4ebf09b7fe7f329888aRobert Jarzmik phy->dev = &client->dev; 106790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy->label = DRV_NAME; 107c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi phy->init = isp1301_phy_init; 108c38a4f3f508d47e51c3f28e8946b1482ebf47feeFelipe Balbi phy->set_vbus = isp1301_phy_set_vbus; 109790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi phy->type = USB_PHY_TYPE_USB2; 110790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 111790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi i2c_set_clientdata(client, isp); 112790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi usb_add_phy_dev(phy); 113790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 1148b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge isp1301_i2c_client = client; 115790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 1168b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return 0; 1178b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 1188b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1198b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int isp1301_remove(struct i2c_client *client) 1208b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 121790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi struct isp1301 *isp = i2c_get_clientdata(client); 122790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 123790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi usb_remove_phy(&isp->phy); 124790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi isp1301_i2c_client = NULL; 125790d3a5ab6e36fb06e99339afe35ecdec4d3b2cbFelipe Balbi 1268b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return 0; 1278b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 1288b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1298b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic struct i2c_driver isp1301_driver = { 1308b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .driver = { 1318b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .name = DRV_NAME, 1328b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge }, 1338b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .probe = isp1301_probe, 1348b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .remove = isp1301_remove, 1358b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge .id_table = isp1301_id, 1368b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge}; 1378b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1388b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggemodule_i2c_driver(isp1301_driver); 1398b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1408b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestatic int match(struct device *dev, void *data) 1418b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 1428b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge struct device_node *node = (struct device_node *)data; 1438b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return (dev->of_node == node) && 1448b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge (dev->driver == &isp1301_driver.driver); 1458b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 1468b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1478b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stiggestruct i2c_client *isp1301_get_client(struct device_node *node) 1488b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge{ 1498b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge if (node) { /* reference of ISP1301 I2C node via DT */ 1508b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge struct device *dev = bus_find_device(&i2c_bus_type, NULL, 1518b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge node, match); 1528b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge if (!dev) 1538b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return NULL; 1548b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return to_i2c_client(dev); 1558b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge } else { /* non-DT: only one ISP1301 chip supported */ 1568b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge return isp1301_i2c_client; 1578b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge } 1588b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge} 1598b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeEXPORT_SYMBOL_GPL(isp1301_get_client); 1608b7c3b68104d687a16dbcc803a18c72148fdfdacRoland Stigge 1618b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); 1628b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver"); 1638b7c3b68104d687a16dbcc803a18c72148fdfdacRoland StiggeMODULE_LICENSE("GPL"); 164