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path: root/drivers/usb/otg/nop-usb-xceiv.c
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Diffstat (limited to 'drivers/usb/otg/nop-usb-xceiv.c')
-rw-r--r--drivers/usb/otg/nop-usb-xceiv.c294
1 files changed, 0 insertions, 294 deletions
diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
deleted file mode 100644
index 2b10cc969bbb..000000000000
--- a/drivers/usb/otg/nop-usb-xceiv.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * drivers/usb/otg/nop-usb-xceiv.c
- *
- * NOP USB transceiver for all USB transceiver which are either built-in
- * into USB IP or which are mostly autonomous.
- *
- * Copyright (C) 2009 Texas Instruments Inc
- * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Current status:
- * This provides a "nop" transceiver for PHYs which are
- * autonomous such as isp1504, isp1707, etc.
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/nop-usb-xceiv.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/regulator/consumer.h>
-#include <linux/of.h>
-
-struct nop_usb_xceiv {
- struct usb_phy phy;
- struct device *dev;
- struct clk *clk;
- struct regulator *vcc;
- struct regulator *reset;
-};
-
-static struct platform_device *pd;
-
-void usb_nop_xceiv_register(void)
-{
- if (pd)
- return;
- pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
- if (!pd) {
- printk(KERN_ERR "Unable to register usb nop transceiver\n");
- return;
- }
-}
-EXPORT_SYMBOL(usb_nop_xceiv_register);
-
-void usb_nop_xceiv_unregister(void)
-{
- platform_device_unregister(pd);
- pd = NULL;
-}
-EXPORT_SYMBOL(usb_nop_xceiv_unregister);
-
-static int nop_set_suspend(struct usb_phy *x, int suspend)
-{
- return 0;
-}
-
-static int nop_init(struct usb_phy *phy)
-{
- struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
-
- if (!IS_ERR(nop->vcc)) {
- if (regulator_enable(nop->vcc))
- dev_err(phy->dev, "Failed to enable power\n");
- }
-
- if (!IS_ERR(nop->clk))
- clk_enable(nop->clk);
-
- if (!IS_ERR(nop->reset)) {
- /* De-assert RESET */
- if (regulator_enable(nop->reset))
- dev_err(phy->dev, "Failed to de-assert reset\n");
- }
-
- return 0;
-}
-
-static void nop_shutdown(struct usb_phy *phy)
-{
- struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
-
- if (!IS_ERR(nop->reset)) {
- /* Assert RESET */
- if (regulator_disable(nop->reset))
- dev_err(phy->dev, "Failed to assert reset\n");
- }
-
- if (!IS_ERR(nop->clk))
- clk_disable(nop->clk);
-
- if (!IS_ERR(nop->vcc)) {
- if (regulator_disable(nop->vcc))
- dev_err(phy->dev, "Failed to disable power\n");
- }
-}
-
-static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
-{
- if (!otg)
- return -ENODEV;
-
- if (!gadget) {
- otg->gadget = NULL;
- return -ENODEV;
- }
-
- otg->gadget = gadget;
- otg->phy->state = OTG_STATE_B_IDLE;
- return 0;
-}
-
-static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- if (!otg)
- return -ENODEV;
-
- if (!host) {
- otg->host = NULL;
- return -ENODEV;
- }
-
- otg->host = host;
- return 0;
-}
-
-static int nop_usb_xceiv_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct nop_usb_xceiv_platform_data *pdata = pdev->dev.platform_data;
- struct nop_usb_xceiv *nop;
- enum usb_phy_type type = USB_PHY_TYPE_USB2;
- int err;
- u32 clk_rate = 0;
- bool needs_vcc = false;
- bool needs_reset = false;
-
- nop = devm_kzalloc(&pdev->dev, sizeof(*nop), GFP_KERNEL);
- if (!nop)
- return -ENOMEM;
-
- nop->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*nop->phy.otg),
- GFP_KERNEL);
- if (!nop->phy.otg)
- return -ENOMEM;
-
- if (dev->of_node) {
- struct device_node *node = dev->of_node;
-
- if (of_property_read_u32(node, "clock-frequency", &clk_rate))
- clk_rate = 0;
-
- needs_vcc = of_property_read_bool(node, "vcc-supply");
- needs_reset = of_property_read_bool(node, "reset-supply");
-
- } else if (pdata) {
- type = pdata->type;
- clk_rate = pdata->clk_rate;
- needs_vcc = pdata->needs_vcc;
- needs_reset = pdata->needs_reset;
- }
-
- nop->clk = devm_clk_get(&pdev->dev, "main_clk");
- if (IS_ERR(nop->clk)) {
- dev_dbg(&pdev->dev, "Can't get phy clock: %ld\n",
- PTR_ERR(nop->clk));
- }
-
- if (!IS_ERR(nop->clk) && clk_rate) {
- err = clk_set_rate(nop->clk, clk_rate);
- if (err) {
- dev_err(&pdev->dev, "Error setting clock rate\n");
- return err;
- }
- }
-
- if (!IS_ERR(nop->clk)) {
- err = clk_prepare(nop->clk);
- if (err) {
- dev_err(&pdev->dev, "Error preparing clock\n");
- return err;
- }
- }
-
- nop->vcc = devm_regulator_get(&pdev->dev, "vcc");
- if (IS_ERR(nop->vcc)) {
- dev_dbg(&pdev->dev, "Error getting vcc regulator: %ld\n",
- PTR_ERR(nop->vcc));
- if (needs_vcc)
- return -EPROBE_DEFER;
- }
-
- nop->reset = devm_regulator_get(&pdev->dev, "reset");
- if (IS_ERR(nop->reset)) {
- dev_dbg(&pdev->dev, "Error getting reset regulator: %ld\n",
- PTR_ERR(nop->reset));
- if (needs_reset)
- return -EPROBE_DEFER;
- }
-
- nop->dev = &pdev->dev;
- nop->phy.dev = nop->dev;
- nop->phy.label = "nop-xceiv";
- nop->phy.set_suspend = nop_set_suspend;
- nop->phy.init = nop_init;
- nop->phy.shutdown = nop_shutdown;
- nop->phy.state = OTG_STATE_UNDEFINED;
- nop->phy.type = type;
-
- nop->phy.otg->phy = &nop->phy;
- nop->phy.otg->set_host = nop_set_host;
- nop->phy.otg->set_peripheral = nop_set_peripheral;
-
- err = usb_add_phy_dev(&nop->phy);
- if (err) {
- dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
- err);
- goto err_add;
- }
-
- platform_set_drvdata(pdev, nop);
-
- ATOMIC_INIT_NOTIFIER_HEAD(&nop->phy.notifier);
-
- return 0;
-
-err_add:
- if (!IS_ERR(nop->clk))
- clk_unprepare(nop->clk);
- return err;
-}
-
-static int nop_usb_xceiv_remove(struct platform_device *pdev)
-{
- struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
-
- if (!IS_ERR(nop->clk))
- clk_unprepare(nop->clk);
-
- usb_remove_phy(&nop->phy);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id nop_xceiv_dt_ids[] = {
- { .compatible = "usb-nop-xceiv" },
- { }
-};
-
-MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);
-
-static struct platform_driver nop_usb_xceiv_driver = {
- .probe = nop_usb_xceiv_probe,
- .remove = nop_usb_xceiv_remove,
- .driver = {
- .name = "nop_usb_xceiv",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(nop_xceiv_dt_ids),
- },
-};
-
-static int __init nop_usb_xceiv_init(void)
-{
- return platform_driver_register(&nop_usb_xceiv_driver);
-}
-subsys_initcall(nop_usb_xceiv_init);
-
-static void __exit nop_usb_xceiv_exit(void)
-{
- platform_driver_unregister(&nop_usb_xceiv_driver);
-}
-module_exit(nop_usb_xceiv_exit);
-
-MODULE_ALIAS("platform:nop_usb_xceiv");
-MODULE_AUTHOR("Texas Instruments Inc");
-MODULE_DESCRIPTION("NOP USB Transceiver driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 19:32:48 +0000