Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * ulpi.c - USB ULPI PHY bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2015 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/ulpi/interface.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/ulpi/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/ulpi/regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/clk/clk-conf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) int ulpi_read(struct ulpi *ulpi, u8 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	return ulpi->ops->read(ulpi->dev.parent, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) EXPORT_SYMBOL_GPL(ulpi_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) int ulpi_write(struct ulpi *ulpi, u8 addr, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	return ulpi->ops->write(ulpi->dev.parent, addr, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) EXPORT_SYMBOL_GPL(ulpi_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static int ulpi_match(struct device *dev, struct device_driver *driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct ulpi_driver *drv = to_ulpi_driver(driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct ulpi *ulpi = to_ulpi_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	const struct ulpi_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	 * Some ULPI devices don't have a vendor id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	 * or provide an id_table so rely on OF match.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (ulpi->id.vendor == 0 || !drv->id_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		return of_driver_match_device(dev, driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	for (id = drv->id_table; id->vendor; id++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		if (id->vendor == ulpi->id.vendor &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		    id->product == ulpi->id.product)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct ulpi *ulpi = to_ulpi_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	ret = of_device_uevent_modalias(dev, env);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (ret != -ENODEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (add_uevent_var(env, "MODALIAS=ulpi:v%04xp%04x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			   ulpi->id.vendor, ulpi->id.product))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int ulpi_probe(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	ret = of_clk_set_defaults(dev->of_node, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return drv->probe(to_ulpi_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) static int ulpi_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	if (drv->remove)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		drv->remove(to_ulpi_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static struct bus_type ulpi_bus = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	.name = "ulpi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	.match = ulpi_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	.uevent = ulpi_uevent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	.probe = ulpi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	.remove = ulpi_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			     char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct ulpi *ulpi = to_ulpi_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	len = of_device_modalias(dev, buf, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (len != -ENODEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return sprintf(buf, "ulpi:v%04xp%04x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		       ulpi->id.vendor, ulpi->id.product);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static DEVICE_ATTR_RO(modalias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static struct attribute *ulpi_dev_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	&dev_attr_modalias.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static struct attribute_group ulpi_dev_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	.attrs = ulpi_dev_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static const struct attribute_group *ulpi_dev_attr_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	&ulpi_dev_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void ulpi_dev_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	of_node_put(dev->of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	kfree(to_ulpi_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static const struct device_type ulpi_dev_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	.name = "ulpi_device",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	.groups = ulpi_dev_attr_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	.release = ulpi_dev_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * ulpi_register_driver - register a driver with the ULPI bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  * @drv: driver being registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  * @module: ends up being THIS_MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  * Registers a driver with the ULPI bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) int __ulpi_register_driver(struct ulpi_driver *drv, struct module *module)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!drv->probe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	drv->driver.owner = module;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	drv->driver.bus = &ulpi_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return driver_register(&drv->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) EXPORT_SYMBOL_GPL(__ulpi_register_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  * ulpi_unregister_driver - unregister a driver with the ULPI bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  * @drv: driver to unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)  * Unregisters a driver with the ULPI bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) void ulpi_unregister_driver(struct ulpi_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	driver_unregister(&drv->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) EXPORT_SYMBOL_GPL(ulpi_unregister_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int ulpi_of_register(struct ulpi *ulpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct device_node *np = NULL, *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	struct device *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	/* Find a ulpi bus underneath the parent or the grandparent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	parent = ulpi->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (parent->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		np = of_get_child_by_name(parent->of_node, "ulpi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	else if (parent->parent && parent->parent->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		np = of_get_child_by_name(parent->parent->of_node, "ulpi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	child = of_get_next_available_child(np, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (!child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	ulpi->dev.of_node = child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int ulpi_read_id(struct ulpi *ulpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	/* Test the interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	ret = ulpi_read(ulpi, ULPI_SCRATCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (ret != 0xaa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	/* Some ULPI devices don't have a vendor id so rely on OF match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (ulpi->id.vendor == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	of_device_request_module(&ulpi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int ulpi_register(struct device *dev, struct ulpi *ulpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	ulpi->dev.parent = dev; /* needed early for ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	ulpi->dev.bus = &ulpi_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	ulpi->dev.type = &ulpi_dev_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ret = ulpi_of_register(ulpi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ret = ulpi_read_id(ulpi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		of_node_put(ulpi->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	ret = device_register(&ulpi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		put_device(&ulpi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		ulpi->id.vendor, ulpi->id.product);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)  * ulpi_register_interface - instantiate new ULPI device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)  * @dev: USB controller's device interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)  * @ops: ULPI register access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)  * Allocates and registers a ULPI device and an interface for it. Called from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)  * the USB controller that provides the ULPI interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct ulpi *ulpi_register_interface(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				     const struct ulpi_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	struct ulpi *ulpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	if (!ulpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	ulpi->ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	ret = ulpi_register(dev, ulpi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		kfree(ulpi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	return ulpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) EXPORT_SYMBOL_GPL(ulpi_register_interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)  * ulpi_unregister_interface - unregister ULPI interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)  * @ulpi: struct ulpi_interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)  * Unregisters a ULPI device and it's interface that was created with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  * ulpi_create_interface().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) void ulpi_unregister_interface(struct ulpi *ulpi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	device_unregister(&ulpi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* -------------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static int __init ulpi_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	return bus_register(&ulpi_bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) subsys_initcall(ulpi_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static void __exit ulpi_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	bus_unregister(&ulpi_bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) module_exit(ulpi_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) MODULE_AUTHOR("Intel Corporation");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) MODULE_DESCRIPTION("USB ULPI PHY bus");