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path: root/drivers/usb/otg/twl6030-usb.c
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Diffstat (limited to 'drivers/usb/otg/twl6030-usb.c')
-rw-r--r--drivers/usb/otg/twl6030-usb.c528
1 files changed, 0 insertions, 528 deletions
diff --git a/drivers/usb/otg/twl6030-usb.c b/drivers/usb/otg/twl6030-usb.c
deleted file mode 100644
index ed2b26cfe81..00000000000
--- a/drivers/usb/otg/twl6030-usb.c
+++ /dev/null
@@ -1,528 +0,0 @@
-/*
- * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
- *
- * Copyright (C) 2010 Texas Instruments Incorporated - http://www.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.
- *
- * Author: Hema HK <hemahk@ti.com>
- *
- * 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/usb/otg.h>
-#include <linux/i2c/twl.h>
-#include <linux/regulator/consumer.h>
-#include <linux/err.h>
-#include <linux/notifier.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-/* usb register definitions */
-#define USB_VENDOR_ID_LSB 0x00
-#define USB_VENDOR_ID_MSB 0x01
-#define USB_PRODUCT_ID_LSB 0x02
-#define USB_PRODUCT_ID_MSB 0x03
-#define USB_VBUS_CTRL_SET 0x04
-#define USB_VBUS_CTRL_CLR 0x05
-#define USB_ID_CTRL_SET 0x06
-#define USB_ID_CTRL_CLR 0x07
-#define USB_VBUS_INT_SRC 0x08
-#define USB_VBUS_INT_LATCH_SET 0x09
-#define USB_VBUS_INT_LATCH_CLR 0x0A
-#define USB_VBUS_INT_EN_LO_SET 0x0B
-#define USB_VBUS_INT_EN_LO_CLR 0x0C
-#define USB_VBUS_INT_EN_HI_SET 0x0D
-#define USB_VBUS_INT_EN_HI_CLR 0x0E
-#define USB_ID_INT_SRC 0x0F
-#define USB_ID_INT_LATCH_SET 0x10
-#define USB_ID_INT_LATCH_CLR 0x11
-
-#define USB_ID_INT_EN_LO_SET 0x12
-#define USB_ID_INT_EN_LO_CLR 0x13
-#define USB_ID_INT_EN_HI_SET 0x14
-#define USB_ID_INT_EN_HI_CLR 0x15
-#define USB_OTG_ADP_CTRL 0x16
-#define USB_OTG_ADP_HIGH 0x17
-#define USB_OTG_ADP_LOW 0x18
-#define USB_OTG_ADP_RISE 0x19
-#define USB_OTG_REVISION 0x1A
-
-/* to be moved to LDO */
-#define TWL6030_MISC2 0xE5
-#define TWL6030_CFG_LDO_PD2 0xF5
-#define TWL6030_BACKUP_REG 0xFA
-
-#define STS_HW_CONDITIONS 0x21
-
-/* In module TWL6030_MODULE_PM_MASTER */
-#define STS_HW_CONDITIONS 0x21
-#define STS_USB_ID BIT(2)
-
-/* In module TWL6030_MODULE_PM_RECEIVER */
-#define VUSB_CFG_TRANS 0x71
-#define VUSB_CFG_STATE 0x72
-#define VUSB_CFG_VOLTAGE 0x73
-
-/* in module TWL6030_MODULE_MAIN_CHARGE */
-
-#define CHARGERUSB_CTRL1 0x8
-
-#define CONTROLLER_STAT1 0x03
-#define VBUS_DET BIT(2)
-
-struct twl6030_usb {
- struct otg_transceiver otg;
- struct device *dev;
-
- /* for vbus reporting with irqs disabled */
- spinlock_t lock;
-
- struct regulator *usb3v3;
-
- /* used to set vbus, in atomic path */
- struct work_struct set_vbus_work;
-
- int irq1;
- int irq2;
- u8 linkstat;
- u8 asleep;
- bool irq_enabled;
- bool vbus_enable;
- unsigned long features;
-};
-
-#define xceiv_to_twl(x) container_of((x), struct twl6030_usb, otg)
-
-/*-------------------------------------------------------------------------*/
-
-static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
- u8 data, u8 address)
-{
- int ret = 0;
-
- ret = twl_i2c_write_u8(module, data, address);
- if (ret < 0)
- dev_err(twl->dev,
- "Write[0x%x] Error %d\n", address, ret);
- return ret;
-}
-
-static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
-{
- u8 data, ret = 0;
-
- ret = twl_i2c_read_u8(module, &data, address);
- if (ret >= 0)
- ret = data;
- else
- dev_err(twl->dev,
- "readb[0x%x,0x%x] Error %d\n",
- module, address, ret);
- return ret;
-}
-
-static int twl6030_phy_init(struct otg_transceiver *x)
-{
- struct twl6030_usb *twl;
- struct device *dev;
- struct twl4030_usb_data *pdata;
-
- twl = xceiv_to_twl(x);
- dev = twl->dev;
- pdata = dev->platform_data;
-
- if (twl->linkstat == USB_EVENT_ID)
- pdata->phy_power(twl->dev, 1, 1);
- else
- pdata->phy_power(twl->dev, 0, 1);
-
- return 0;
-}
-
-static void twl6030_phy_shutdown(struct otg_transceiver *x)
-{
- struct twl6030_usb *twl;
- struct device *dev;
- struct twl4030_usb_data *pdata;
-
- twl = xceiv_to_twl(x);
- dev = twl->dev;
- pdata = dev->platform_data;
- pdata->phy_power(twl->dev, 0, 0);
-}
-
-static int twl6030_phy_suspend(struct otg_transceiver *x, int suspend)
-{
- struct twl6030_usb *twl = xceiv_to_twl(x);
- struct device *dev = twl->dev;
- struct twl4030_usb_data *pdata = dev->platform_data;
-
- pdata->phy_suspend(dev, suspend);
-
- return 0;
-}
-
-static int twl6030_start_srp(struct otg_transceiver *x)
-{
- struct twl6030_usb *twl = xceiv_to_twl(x);
-
- twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
- twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
-
- mdelay(100);
- twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
-
- return 0;
-}
-
-static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
-{
- char *regulator_name;
-
- if (twl->features & TWL6025_SUBCLASS)
- regulator_name = "ldousb";
- else
- regulator_name = "vusb";
-
- /* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);
-
- /* Program CFG_LDO_PD2 register and set VUSB bit */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2);
-
- /* Program MISC2 register and set bit VUSB_IN_VBAT */
- twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);
-
- twl->usb3v3 = regulator_get(twl->dev, regulator_name);
- if (IS_ERR(twl->usb3v3))
- return -ENODEV;
-
- /* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
- twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
-
- /*
- * Program the USB_ID_CTRL_SET register to enable GND drive
- * and the ID comparators
- */
- twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
-
- return 0;
-}
-
-static ssize_t twl6030_usb_vbus_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct twl6030_usb *twl = dev_get_drvdata(dev);
- unsigned long flags;
- int ret = -EINVAL;
-
- spin_lock_irqsave(&twl->lock, flags);
-
- switch (twl->linkstat) {
- case USB_EVENT_VBUS:
- ret = snprintf(buf, PAGE_SIZE, "vbus\n");
- break;
- case USB_EVENT_ID:
- ret = snprintf(buf, PAGE_SIZE, "id\n");
- break;
- case USB_EVENT_NONE:
- ret = snprintf(buf, PAGE_SIZE, "none\n");
- break;
- default:
- ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
- }
- spin_unlock_irqrestore(&twl->lock, flags);
-
- return ret;
-}
-static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
-
-static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
-{
- struct twl6030_usb *twl = _twl;
- int status;
- u8 vbus_state, hw_state;
-
- hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
-
- vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
- CONTROLLER_STAT1);
- if (!(hw_state & STS_USB_ID)) {
- if (vbus_state & VBUS_DET) {
- regulator_enable(twl->usb3v3);
- twl->asleep = 1;
- status = USB_EVENT_VBUS;
- twl->otg.default_a = false;
- twl->otg.state = OTG_STATE_B_IDLE;
- twl->linkstat = status;
- twl->otg.last_event = status;
- atomic_notifier_call_chain(&twl->otg.notifier,
- status, twl->otg.gadget);
- } else {
- status = USB_EVENT_NONE;
- twl->linkstat = status;
- twl->otg.last_event = status;
- atomic_notifier_call_chain(&twl->otg.notifier,
- status, twl->otg.gadget);
- if (twl->asleep) {
- regulator_disable(twl->usb3v3);
- twl->asleep = 0;
- }
- }
- }
- sysfs_notify(&twl->dev->kobj, NULL, "vbus");
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
-{
- struct twl6030_usb *twl = _twl;
- int status = USB_EVENT_NONE;
- u8 hw_state;
-
- hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
-
- if (hw_state & STS_USB_ID) {
-
- regulator_enable(twl->usb3v3);
- twl->asleep = 1;
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR, 0x1);
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
- 0x10);
- status = USB_EVENT_ID;
- twl->otg.default_a = true;
- twl->otg.state = OTG_STATE_A_IDLE;
- twl->linkstat = status;
- twl->otg.last_event = status;
- atomic_notifier_call_chain(&twl->otg.notifier, status,
- twl->otg.gadget);
- } else {
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR,
- 0x10);
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
- 0x1);
- }
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_LATCH_CLR, status);
-
- return IRQ_HANDLED;
-}
-
-static int twl6030_set_peripheral(struct otg_transceiver *x,
- struct usb_gadget *gadget)
-{
- struct twl6030_usb *twl;
-
- if (!x)
- return -ENODEV;
-
- twl = xceiv_to_twl(x);
- twl->otg.gadget = gadget;
- if (!gadget)
- twl->otg.state = OTG_STATE_UNDEFINED;
-
- return 0;
-}
-
-static int twl6030_enable_irq(struct otg_transceiver *x)
-{
- struct twl6030_usb *twl = xceiv_to_twl(x);
-
- twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET, 0x1);
- twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
- twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
-
- twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
- REG_INT_MSK_LINE_C);
- twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
- REG_INT_MSK_STS_C);
- twl6030_usb_irq(twl->irq2, twl);
- twl6030_usbotg_irq(twl->irq1, twl);
-
- return 0;
-}
-
-static void otg_set_vbus_work(struct work_struct *data)
-{
- struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
- set_vbus_work);
-
- /*
- * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
- * register. This enables boost mode.
- */
-
- if (twl->vbus_enable)
- twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
- CHARGERUSB_CTRL1);
- else
- twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
- CHARGERUSB_CTRL1);
-}
-
-static int twl6030_set_vbus(struct otg_transceiver *x, bool enabled)
-{
- struct twl6030_usb *twl = xceiv_to_twl(x);
-
- twl->vbus_enable = enabled;
- schedule_work(&twl->set_vbus_work);
-
- return 0;
-}
-
-static int twl6030_set_host(struct otg_transceiver *x, struct usb_bus *host)
-{
- struct twl6030_usb *twl;
-
- if (!x)
- return -ENODEV;
-
- twl = xceiv_to_twl(x);
- twl->otg.host = host;
- if (!host)
- twl->otg.state = OTG_STATE_UNDEFINED;
- return 0;
-}
-
-static int __devinit twl6030_usb_probe(struct platform_device *pdev)
-{
- struct twl6030_usb *twl;
- int status, err;
- struct twl4030_usb_data *pdata;
- struct device *dev = &pdev->dev;
- pdata = dev->platform_data;
-
- twl = kzalloc(sizeof *twl, GFP_KERNEL);
- if (!twl)
- return -ENOMEM;
-
- twl->dev = &pdev->dev;
- twl->irq1 = platform_get_irq(pdev, 0);
- twl->irq2 = platform_get_irq(pdev, 1);
- twl->features = pdata->features;
- twl->otg.dev = twl->dev;
- twl->otg.label = "twl6030";
- twl->otg.set_host = twl6030_set_host;
- twl->otg.set_peripheral = twl6030_set_peripheral;
- twl->otg.set_vbus = twl6030_set_vbus;
- twl->otg.init = twl6030_phy_init;
- twl->otg.shutdown = twl6030_phy_shutdown;
- twl->otg.set_suspend = twl6030_phy_suspend;
- twl->otg.start_srp = twl6030_start_srp;
-
- /* init spinlock for workqueue */
- spin_lock_init(&twl->lock);
-
- err = twl6030_usb_ldo_init(twl);
- if (err) {
- dev_err(&pdev->dev, "ldo init failed\n");
- kfree(twl);
- return err;
- }
- otg_set_transceiver(&twl->otg);
-
- platform_set_drvdata(pdev, twl);
- if (device_create_file(&pdev->dev, &dev_attr_vbus))
- dev_warn(&pdev->dev, "could not create sysfs file\n");
-
- ATOMIC_INIT_NOTIFIER_HEAD(&twl->otg.notifier);
-
- INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
-
- twl->irq_enabled = true;
- status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
- "twl6030_usb", twl);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
- twl->irq1, status);
- device_remove_file(twl->dev, &dev_attr_vbus);
- kfree(twl);
- return status;
- }
-
- status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
- "twl6030_usb", twl);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
- twl->irq2, status);
- free_irq(twl->irq1, twl);
- device_remove_file(twl->dev, &dev_attr_vbus);
- kfree(twl);
- return status;
- }
-
- twl->asleep = 0;
- pdata->phy_init(dev);
- twl6030_phy_suspend(&twl->otg, 0);
- twl6030_enable_irq(&twl->otg);
- dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
-
- return 0;
-}
-
-static int __exit twl6030_usb_remove(struct platform_device *pdev)
-{
- struct twl6030_usb *twl = platform_get_drvdata(pdev);
-
- struct twl4030_usb_data *pdata;
- struct device *dev = &pdev->dev;
- pdata = dev->platform_data;
-
- twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
- REG_INT_MSK_LINE_C);
- twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
- REG_INT_MSK_STS_C);
- free_irq(twl->irq1, twl);
- free_irq(twl->irq2, twl);
- regulator_put(twl->usb3v3);
- pdata->phy_exit(twl->dev);
- device_remove_file(twl->dev, &dev_attr_vbus);
- cancel_work_sync(&twl->set_vbus_work);
- kfree(twl);
-
- return 0;
-}
-
-static struct platform_driver twl6030_usb_driver = {
- .probe = twl6030_usb_probe,
- .remove = __exit_p(twl6030_usb_remove),
- .driver = {
- .name = "twl6030_usb",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init twl6030_usb_init(void)
-{
- return platform_driver_register(&twl6030_usb_driver);
-}
-subsys_initcall(twl6030_usb_init);
-
-static void __exit twl6030_usb_exit(void)
-{
- platform_driver_unregister(&twl6030_usb_driver);
-}
-module_exit(twl6030_usb_exit);
-
-MODULE_ALIAS("platform:twl6030_usb");
-MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
-MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 08:34:54 +0000