From patchwork Fri Dec 10 12:28:20 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kalliguddi, Hema" X-Patchwork-Id: 398202 X-Patchwork-Delegate: me@felipebalbi.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oBACSeea022840 for ; Fri, 10 Dec 2010 12:28:40 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755764Ab0LJM2g (ORCPT ); Fri, 10 Dec 2010 07:28:36 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:56371 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755656Ab0LJM2e (ORCPT ); Fri, 10 Dec 2010 07:28:34 -0500 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id oBACSNVJ023160 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 10 Dec 2010 06:28:25 -0600 Received: from localhost.localdomain (localhost [127.0.0.1]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id oBACSMqu025943; Fri, 10 Dec 2010 17:58:22 +0530 (IST) From: Hema HK To: linux-usb@vger.kernel.org, linux-omap@vger.kernel.org Cc: Hema HK , Felipe Balbi , Tony Lindgren , David Brownell Subject: [PATCH 2/8 V3] usb: otg: Adding twl6030-usb transceiver driver for OMAP4430 Date: Fri, 10 Dec 2010 17:58:20 +0530 Message-Id: <1291984100-14824-1-git-send-email-hemahk@ti.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Fri, 10 Dec 2010 12:28:40 +0000 (UTC) Index: usb/arch/arm/mach-omap2/omap_phy_internal.c =================================================================== --- /dev/null +++ usb/arch/arm/mach-omap2/omap_phy_internal.c @@ -0,0 +1,149 @@ +/* + * This file configures the internal USB PHY in OMAP4430. Used + * with TWL6030 transceiver and MUSB on OMAP4430. + * + * 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 + * + * 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 +#include +#include +#include +#include +#include + +#include + +/* OMAP control module register for UTMI PHY */ +#define CONTROL_DEV_CONF 0x300 +#define PHY_PD 0x1 + +#define USBOTGHS_CONTROL 0x33c +#define AVALID BIT(0) +#define BVALID BIT(1) +#define VBUSVALID BIT(2) +#define SESSEND BIT(3) +#define IDDIG BIT(4) + +static struct clk *phyclk, *clk48m, *clk32k; +static void __iomem *ctrl_base; + +int omap4430_phy_init(struct device *dev) +{ + ctrl_base = ioremap(OMAP443X_SCM_BASE, SZ_1K); + if (!ctrl_base) { + dev_err(dev, "control module ioremap failed\n"); + return -ENOMEM; + } + /* Power down the phy */ + __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF); + phyclk = clk_get(dev, "ocp2scp_usb_phy_ick"); + + if (IS_ERR(phyclk)) { + dev_err(dev, "cannot clk_get ocp2scp_usb_phy_ick\n"); + iounmap(ctrl_base); + return PTR_ERR(phyclk); + } + + clk48m = clk_get(dev, "ocp2scp_usb_phy_phy_48m"); + if (IS_ERR(clk48m)) { + dev_err(dev, "cannot clk_get ocp2scp_usb_phy_phy_48m\n"); + clk_put(phyclk); + iounmap(ctrl_base); + return PTR_ERR(clk48m); + } + + clk32k = clk_get(dev, "usb_phy_cm_clk32k"); + if (IS_ERR(clk32k)) { + dev_err(dev, "cannot clk_get usb_phy_cm_clk32k\n"); + clk_put(phyclk); + clk_put(clk48m); + iounmap(ctrl_base); + return PTR_ERR(clk32k); + } + return 0; +} + +int omap4430_phy_set_clk(struct device *dev, int on) +{ + static int state; + + if (on && !state) { + /* Enable the phy clocks */ + clk_enable(phyclk); + clk_enable(clk48m); + clk_enable(clk32k); + state = 1; + } else if (state) { + /* Disable the phy clocks */ + clk_disable(phyclk); + clk_disable(clk48m); + clk_disable(clk32k); + state = 0; + } + return 0; +} + +int omap4430_phy_power(struct device *dev, int ID, int on) +{ + if (on) { + /* enabled the clocks */ + omap4430_phy_set_clk(dev, 1); + /* power on the phy */ + if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) { + __raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF); + mdelay(200); + } + if (ID) + /* enable VBUS valid, IDDIG groung */ + __raw_writel(AVALID | VBUSVALID, ctrl_base + + USBOTGHS_CONTROL); + else + /* + * Enable VBUS Valid, AValid and IDDIG + * high impedence + */ + __raw_writel(IDDIG | AVALID | VBUSVALID, + ctrl_base + USBOTGHS_CONTROL); + } else { + /* Enable session END and IDIG to high impedence. */ + __raw_writel(SESSEND | IDDIG, ctrl_base + + USBOTGHS_CONTROL); + /* Disable the clocks */ + omap4430_phy_set_clk(dev, 0); + /* Power down the phy */ + __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF); + } + + return 0; +} + +int omap4430_phy_exit(struct device *dev) +{ + if (ctrl_base) + iounmap(ctrl_base); + if (phyclk) + clk_put(phyclk); + if (clk48m) + clk_put(clk48m); + if (clk32k) + clk_put(clk32k); + + return 0; +} Index: usb/arch/arm/plat-omap/include/plat/usb.h =================================================================== --- usb.orig/arch/arm/plat-omap/include/plat/usb.h +++ usb/arch/arm/plat-omap/include/plat/usb.h @@ -84,6 +84,11 @@ extern void usb_ehci_init(const struct e extern void usb_ohci_init(const struct ohci_hcd_omap_platform_data *pdata); +extern int omap4430_phy_power(struct device *dev, int ID, int on); +extern int omap4430_phy_set_clk(struct device *dev, int on); +extern int omap4430_phy_init(struct device *dev); +extern int omap4430_phy_exit(struct device *dev); + #endif Index: usb/drivers/usb/otg/twl6030-usb.c =================================================================== --- /dev/null +++ usb/drivers/usb/otg/twl6030-usb.c @@ -0,0 +1,493 @@ +/* + * 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 + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* 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; + + int irq1; + int irq2; + u8 linkstat; + u8 asleep; + bool irq_enabled; +}; + +#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_set_phy_clk(struct otg_transceiver *x, int on) +{ + 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_set_clock(twl->dev, on); + + return 0; +} + +static int twl6030_phy_init(struct otg_transceiver *x) +{ + u8 hw_state; + struct twl6030_usb *twl; + struct device *dev; + struct twl4030_usb_data *pdata; + + twl = xceiv_to_twl(x); + dev = twl->dev; + pdata = dev->platform_data; + + regulator_enable(twl->usb3v3); + + hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS); + + if (hw_state & STS_USB_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); + regulator_disable(twl->usb3v3); +} + +static int twl6030_usb_ldo_init(struct twl6030_usb *twl) +{ + + /* 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, "vusb"); + if (IS_ERR(twl->usb3v3)) + return -ENODEV; + + regulator_enable(twl->usb3v3); + + /* Program the VUSB_CFG_TRANS for ACTIVE state. */ + twl6030_writeb(twl, TWL_MODULE_PM_RECEIVER, 0x3F, + VUSB_CFG_TRANS); + + /* Program the VUSB_CFG_STATE register to ON on all groups. */ + twl6030_writeb(twl, TWL_MODULE_PM_RECEIVER, 0xE1, + VUSB_CFG_STATE); + + /* 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) { + status = USB_EVENT_VBUS; + twl->otg.default_a = false; + twl->otg.state = OTG_STATE_B_IDLE; + } else { + status = USB_EVENT_NONE; + } + if (status >= 0) { + twl->linkstat = status; + blocking_notifier_call_chain(&twl->otg.notifier, + status, twl->otg.gadget); + } + } + 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) { + + 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; + blocking_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); + twl->linkstat = 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 int twl6030_set_vbus(struct otg_transceiver *x, bool enabled) +{ + struct twl6030_usb *twl = xceiv_to_twl(x); + + /* + * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1 + * register. This enables boost mode. + */ + if (enabled) + twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40, + CHARGERUSB_CTRL1); + else + twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00, + CHARGERUSB_CTRL1); + 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->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; + + /* 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"); + + BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier); + + 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; + } + + pdata->phy_init(dev); + 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); + 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 "); +MODULE_DESCRIPTION("TWL6030 USB transceiver driver"); +MODULE_LICENSE("GPL");