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-rw-r--r--drivers/usb/otg/Kconfig54
-rw-r--r--drivers/usb/otg/Makefile15
-rw-r--r--drivers/usb/otg/gpio_vbus.c335
-rw-r--r--drivers/usb/otg/isp1301_omap.c1683
-rw-r--r--drivers/usb/otg/otg.c65
-rw-r--r--drivers/usb/otg/twl4030-usb.c721
6 files changed, 2873 insertions, 0 deletions
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
new file mode 100644
index 00000000000..8e8dbdb9b39
--- /dev/null
+++ b/drivers/usb/otg/Kconfig
@@ -0,0 +1,54 @@
+#
+# USB OTG infrastructure may be needed for peripheral-only, host-only,
+# or OTG-capable configurations when OTG transceivers or controllers
+# are used.
+#
+
+comment "OTG and related infrastructure"
+
+if USB || USB_GADGET
+
+config USB_OTG_UTILS
+ bool
+ help
+ Select this to make sure the build includes objects from
+ the OTG infrastructure directory.
+
+#
+# USB Transceiver Drivers
+#
+config USB_GPIO_VBUS
+ tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
+ depends on GENERIC_GPIO
+ select USB_OTG_UTILS
+ help
+ Provides simple GPIO VBUS sensing for controllers with an
+ internal transceiver via the otg_transceiver interface, and
+ optionally control of a D+ pullup GPIO as well as a VBUS
+ current limit regulator.
+
+config ISP1301_OMAP
+ tristate "Philips ISP1301 with OMAP OTG"
+ depends on I2C && ARCH_OMAP_OTG
+ select USB_OTG_UTILS
+ help
+ If you say yes here you get support for the Philips ISP1301
+ USB-On-The-Go transceiver working with the OMAP OTG controller.
+ The ISP1301 is a full speed USB transceiver which is used in
+ products including H2, H3, and H4 development boards for Texas
+ Instruments OMAP processors.
+
+ This driver can also be built as a module. If so, the module
+ will be called isp1301_omap.
+
+config TWL4030_USB
+ tristate "TWL4030 USB Transceiver Driver"
+ depends on TWL4030_CORE
+ select USB_OTG_UTILS
+ help
+ Enable this to support the USB OTG transceiver on TWL4030
+ family chips (including the TWL5030 and TPS659x0 devices).
+ This transceiver supports high and full speed devices plus,
+ in host mode, low speed.
+
+endif # USB || OTG
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
new file mode 100644
index 00000000000..d73c7cf5e2f
--- /dev/null
+++ b/drivers/usb/otg/Makefile
@@ -0,0 +1,15 @@
+#
+# OTG infrastructure and transceiver drivers
+#
+
+# infrastructure
+obj-$(CONFIG_USB_OTG_UTILS) += otg.o
+
+# transceiver drivers
+obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
+obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
+obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
+
+ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG
+ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG
+
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
new file mode 100644
index 00000000000..63a6036f04b
--- /dev/null
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -0,0 +1,335 @@
+/*
+ * gpio-vbus.c - simple GPIO VBUS sensing driver for B peripheral devices
+ *
+ * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+
+#include <linux/regulator/consumer.h>
+
+#include <linux/usb/gadget.h>
+#include <linux/usb/gpio_vbus.h>
+#include <linux/usb/otg.h>
+
+
+/*
+ * A simple GPIO VBUS sensing driver for B peripheral only devices
+ * with internal transceivers. It can control a D+ pullup GPIO and
+ * a regulator to limit the current drawn from VBUS.
+ *
+ * Needs to be loaded before the UDC driver that will use it.
+ */
+struct gpio_vbus_data {
+ struct otg_transceiver otg;
+ struct device *dev;
+ struct regulator *vbus_draw;
+ int vbus_draw_enabled;
+ unsigned mA;
+};
+
+
+/*
+ * This driver relies on "both edges" triggering. VBUS has 100 msec to
+ * stabilize, so the peripheral controller driver may need to cope with
+ * some bouncing due to current surges (e.g. charging local capacitance)
+ * and contact chatter.
+ *
+ * REVISIT in desperate straits, toggling between rising and falling
+ * edges might be workable.
+ */
+#define VBUS_IRQ_FLAGS \
+ ( IRQF_SAMPLE_RANDOM | IRQF_SHARED \
+ | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING )
+
+
+/* interface to regulator framework */
+static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
+{
+ struct regulator *vbus_draw = gpio_vbus->vbus_draw;
+ int enabled;
+
+ if (!vbus_draw)
+ return;
+
+ enabled = gpio_vbus->vbus_draw_enabled;
+ if (mA) {
+ regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
+ if (!enabled) {
+ regulator_enable(vbus_draw);
+ gpio_vbus->vbus_draw_enabled = 1;
+ }
+ } else {
+ if (enabled) {
+ regulator_disable(vbus_draw);
+ gpio_vbus->vbus_draw_enabled = 0;
+ }
+ }
+ gpio_vbus->mA = mA;
+}
+
+/* VBUS change IRQ handler */
+static irqreturn_t gpio_vbus_irq(int irq, void *data)
+{
+ struct platform_device *pdev = data;
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
+ int gpio, vbus;
+
+ vbus = gpio_get_value(pdata->gpio_vbus);
+ if (pdata->gpio_vbus_inverted)
+ vbus = !vbus;
+
+ dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n",
+ vbus ? "supplied" : "inactive",
+ gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none");
+
+ if (!gpio_vbus->otg.gadget)
+ return IRQ_HANDLED;
+
+ /* Peripheral controllers which manage the pullup themselves won't have
+ * gpio_pullup configured here. If it's configured here, we'll do what
+ * isp1301_omap::b_peripheral() does and enable the pullup here... although
+ * that may complicate usb_gadget_{,dis}connect() support.
+ */
+ gpio = pdata->gpio_pullup;
+ if (vbus) {
+ gpio_vbus->otg.state = OTG_STATE_B_PERIPHERAL;
+ usb_gadget_vbus_connect(gpio_vbus->otg.gadget);
+
+ /* drawing a "unit load" is *always* OK, except for OTG */
+ set_vbus_draw(gpio_vbus, 100);
+
+ /* optionally enable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, !pdata->gpio_pullup_inverted);
+ } else {
+ /* optionally disable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, pdata->gpio_pullup_inverted);
+
+ set_vbus_draw(gpio_vbus, 0);
+
+ usb_gadget_vbus_disconnect(gpio_vbus->otg.gadget);
+ gpio_vbus->otg.state = OTG_STATE_B_IDLE;
+ }
+
+ return IRQ_HANDLED;
+}
+
+/* OTG transceiver interface */
+
+/* bind/unbind the peripheral controller */
+static int gpio_vbus_set_peripheral(struct otg_transceiver *otg,
+ struct usb_gadget *gadget)
+{
+ struct gpio_vbus_data *gpio_vbus;
+ struct gpio_vbus_mach_info *pdata;
+ struct platform_device *pdev;
+ int gpio, irq;
+
+ gpio_vbus = container_of(otg, struct gpio_vbus_data, otg);
+ pdev = to_platform_device(gpio_vbus->dev);
+ pdata = gpio_vbus->dev->platform_data;
+ irq = gpio_to_irq(pdata->gpio_vbus);
+ gpio = pdata->gpio_pullup;
+
+ if (!gadget) {
+ dev_dbg(&pdev->dev, "unregistering gadget '%s'\n",
+ otg->gadget->name);
+
+ /* optionally disable D+ pullup */
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, pdata->gpio_pullup_inverted);
+
+ set_vbus_draw(gpio_vbus, 0);
+
+ usb_gadget_vbus_disconnect(otg->gadget);
+ otg->state = OTG_STATE_UNDEFINED;
+
+ otg->gadget = NULL;
+ return 0;
+ }
+
+ otg->gadget = gadget;
+ dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name);
+
+ /* initialize connection state */
+ gpio_vbus_irq(irq, pdev);
+ return 0;
+}
+
+/* effective for B devices, ignored for A-peripheral */
+static int gpio_vbus_set_power(struct otg_transceiver *otg, unsigned mA)
+{
+ struct gpio_vbus_data *gpio_vbus;
+
+ gpio_vbus = container_of(otg, struct gpio_vbus_data, otg);
+
+ if (otg->state == OTG_STATE_B_PERIPHERAL)
+ set_vbus_draw(gpio_vbus, mA);
+ return 0;
+}
+
+/* for non-OTG B devices: set/clear transceiver suspend mode */
+static int gpio_vbus_set_suspend(struct otg_transceiver *otg, int suspend)
+{
+ struct gpio_vbus_data *gpio_vbus;
+
+ gpio_vbus = container_of(otg, struct gpio_vbus_data, otg);
+
+ /* draw max 0 mA from vbus in suspend mode; or the previously
+ * recorded amount of current if not suspended
+ *
+ * NOTE: high powered configs (mA > 100) may draw up to 2.5 mA
+ * if they're wake-enabled ... we don't handle that yet.
+ */
+ return gpio_vbus_set_power(otg, suspend ? 0 : gpio_vbus->mA);
+}
+
+/* platform driver interface */
+
+static int __init gpio_vbus_probe(struct platform_device *pdev)
+{
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ struct gpio_vbus_data *gpio_vbus;
+ struct resource *res;
+ int err, gpio, irq;
+
+ if (!pdata || !gpio_is_valid(pdata->gpio_vbus))
+ return -EINVAL;
+ gpio = pdata->gpio_vbus;
+
+ gpio_vbus = kzalloc(sizeof(struct gpio_vbus_data), GFP_KERNEL);
+ if (!gpio_vbus)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, gpio_vbus);
+ gpio_vbus->dev = &pdev->dev;
+ gpio_vbus->otg.label = "gpio-vbus";
+ gpio_vbus->otg.state = OTG_STATE_UNDEFINED;
+ gpio_vbus->otg.set_peripheral = gpio_vbus_set_peripheral;
+ gpio_vbus->otg.set_power = gpio_vbus_set_power;
+ gpio_vbus->otg.set_suspend = gpio_vbus_set_suspend;
+
+ err = gpio_request(gpio, "vbus_detect");
+ if (err) {
+ dev_err(&pdev->dev, "can't request vbus gpio %d, err: %d\n",
+ gpio, err);
+ goto err_gpio;
+ }
+ gpio_direction_input(gpio);
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res) {
+ irq = res->start;
+ res->flags &= IRQF_TRIGGER_MASK;
+ res->flags |= IRQF_SAMPLE_RANDOM | IRQF_SHARED;
+ } else
+ irq = gpio_to_irq(gpio);
+
+ /* if data line pullup is in use, initialize it to "not pulling up" */
+ gpio = pdata->gpio_pullup;
+ if (gpio_is_valid(gpio)) {
+ err = gpio_request(gpio, "udc_pullup");
+ if (err) {
+ dev_err(&pdev->dev,
+ "can't request pullup gpio %d, err: %d\n",
+ gpio, err);
+ gpio_free(pdata->gpio_vbus);
+ goto err_gpio;
+ }
+ gpio_direction_output(gpio, pdata->gpio_pullup_inverted);
+ }
+
+ err = request_irq(irq, gpio_vbus_irq, VBUS_IRQ_FLAGS,
+ "vbus_detect", pdev);
+ if (err) {
+ dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
+ irq, err);
+ goto err_irq;
+ }
+
+ /* only active when a gadget is registered */
+ err = otg_set_transceiver(&gpio_vbus->otg);
+ if (err) {
+ dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
+ err);
+ goto err_otg;
+ }
+
+ gpio_vbus->vbus_draw = regulator_get(&pdev->dev, "vbus_draw");
+ if (IS_ERR(gpio_vbus->vbus_draw)) {
+ dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n",
+ PTR_ERR(gpio_vbus->vbus_draw));
+ gpio_vbus->vbus_draw = NULL;
+ }
+
+ return 0;
+err_otg:
+ free_irq(irq, &pdev->dev);
+err_irq:
+ if (gpio_is_valid(pdata->gpio_pullup))
+ gpio_free(pdata->gpio_pullup);
+ gpio_free(pdata->gpio_vbus);
+err_gpio:
+ platform_set_drvdata(pdev, NULL);
+ kfree(gpio_vbus);
+ return err;
+}
+
+static int __exit gpio_vbus_remove(struct platform_device *pdev)
+{
+ struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ int gpio = pdata->gpio_vbus;
+
+ regulator_put(gpio_vbus->vbus_draw);
+
+ otg_set_transceiver(NULL);
+
+ free_irq(gpio_to_irq(gpio), &pdev->dev);
+ if (gpio_is_valid(pdata->gpio_pullup))
+ gpio_free(pdata->gpio_pullup);
+ gpio_free(gpio);
+ platform_set_drvdata(pdev, NULL);
+ kfree(gpio_vbus);
+
+ return 0;
+}
+
+/* NOTE: the gpio-vbus device may *NOT* be hotplugged */
+
+MODULE_ALIAS("platform:gpio-vbus");
+
+static struct platform_driver gpio_vbus_driver = {
+ .driver = {
+ .name = "gpio-vbus",
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(gpio_vbus_remove),
+};
+
+static int __init gpio_vbus_init(void)
+{
+ return platform_driver_probe(&gpio_vbus_driver, gpio_vbus_probe);
+}
+module_init(gpio_vbus_init);
+
+static void __exit gpio_vbus_exit(void)
+{
+ platform_driver_unregister(&gpio_vbus_driver);
+}
+module_exit(gpio_vbus_exit);
+
+MODULE_DESCRIPTION("simple GPIO controlled OTG transceiver driver");
+MODULE_AUTHOR("Philipp Zabel");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/otg/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c
new file mode 100644
index 00000000000..e0d56ef2bcb
--- /dev/null
+++ b/drivers/usb/otg/isp1301_omap.c
@@ -0,0 +1,1683 @@
+/*
+ * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
+ *
+ * Copyright (C) 2004 Texas Instruments
+ * Copyright (C) 2004 David Brownell
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include <mach/usb.h>
+#include <mach/mux.h>
+
+
+#ifndef DEBUG
+#undef VERBOSE
+#endif
+
+
+#define DRIVER_VERSION "24 August 2004"
+#define DRIVER_NAME (isp1301_driver.driver.name)
+
+MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
+MODULE_LICENSE("GPL");
+
+struct isp1301 {
+ struct otg_transceiver otg;
+ struct i2c_client *client;
+ void (*i2c_release)(struct device *dev);
+
+ int irq_type;
+
+ u32 last_otg_ctrl;
+ unsigned working:1;
+
+ struct timer_list timer;
+
+ /* use keventd context to change the state for us */
+ struct work_struct work;
+
+ unsigned long todo;
+# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
+# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
+# define WORK_HOST_RESUME 4 /* resume host */
+# define WORK_TIMER 6 /* timer fired */
+# define WORK_STOP 7 /* don't resubmit */
+};
+
+
+/* bits in OTG_CTRL */
+
+#define OTG_XCEIV_OUTPUTS \
+ (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
+#define OTG_XCEIV_INPUTS \
+ (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
+#define OTG_CTRL_BITS \
+ (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
+ /* and OTG_PULLUP is sometimes written */
+
+#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
+ OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
+ OTG_CTRL_BITS)
+
+
+/*-------------------------------------------------------------------------*/
+
+/* board-specific PM hooks */
+
+#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
+
+#if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
+
+#include <linux/i2c/tps65010.h>
+
+#else
+
+static inline int tps65010_set_vbus_draw(unsigned mA)
+{
+ pr_debug("tps65010: draw %d mA (STUB)\n", mA);
+ return 0;
+}
+
+#endif
+
+static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
+{
+ int status = tps65010_set_vbus_draw(mA);
+ if (status < 0)
+ pr_debug(" VBUS %d mA error %d\n", mA, status);
+}
+
+static void enable_vbus_source(struct isp1301 *isp)
+{
+ /* this board won't supply more than 8mA vbus power.
+ * some boards can switch a 100ma "unit load" (or more).
+ */
+}
+
+
+/* products will deliver OTG messages with LEDs, GUI, etc */
+static inline void notresponding(struct isp1301 *isp)
+{
+ printk(KERN_NOTICE "OTG device not responding.\n");
+}
+
+
+#endif
+
+#if defined(CONFIG_MACH_OMAP_H4)
+
+static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
+{
+ /* H4 controls this by DIP switch S2.4; no soft control.
+ * ON means the charger is always enabled. Leave it OFF
+ * unless the OTG port is used only in B-peripheral mode.
+ */
+}
+
+static void enable_vbus_source(struct isp1301 *isp)
+{
+ /* this board won't supply more than 8mA vbus power.
+ * some boards can switch a 100ma "unit load" (or more).
+ */
+}
+
+
+/* products will deliver OTG messages with LEDs, GUI, etc */
+static inline void notresponding(struct isp1301 *isp)
+{
+ printk(KERN_NOTICE "OTG device not responding.\n");
+}
+
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static struct i2c_driver isp1301_driver;
+
+/* smbus apis are used for portability */
+
+static inline u8
+isp1301_get_u8(struct isp1301 *isp, u8 reg)
+{
+ return i2c_smbus_read_byte_data(isp->client, reg + 0);
+}
+
+static inline int
+isp1301_get_u16(struct isp1301 *isp, u8 reg)
+{
+ return i2c_smbus_read_word_data(isp->client, reg);
+}
+
+static inline int
+isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
+{
+ return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
+}
+
+static inline int
+isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
+{
+ return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* identification */
+#define ISP1301_VENDOR_ID 0x00 /* u16 read */
+#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
+#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
+
+#define I2C_VENDOR_ID_PHILIPS 0x04cc
+#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
+
+/* operational registers */
+#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
+# define MC1_SPEED (1 << 0)
+# define MC1_SUSPEND (1 << 1)
+# define MC1_DAT_SE0 (1 << 2)
+# define MC1_TRANSPARENT (1 << 3)
+# define MC1_BDIS_ACON_EN (1 << 4)
+# define MC1_OE_INT_EN (1 << 5)
+# define MC1_UART_EN (1 << 6)
+# define MC1_MASK 0x7f
+#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
+# define MC2_GLOBAL_PWR_DN (1 << 0)
+# define MC2_SPD_SUSP_CTRL (1 << 1)
+# define MC2_BI_DI (1 << 2)
+# define MC2_TRANSP_BDIR0 (1 << 3)
+# define MC2_TRANSP_BDIR1 (1 << 4)
+# define MC2_AUDIO_EN (1 << 5)
+# define MC2_PSW_EN (1 << 6)
+# define MC2_EN2V7 (1 << 7)
+#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
+# define OTG1_DP_PULLUP (1 << 0)
+# define OTG1_DM_PULLUP (1 << 1)
+# define OTG1_DP_PULLDOWN (1 << 2)
+# define OTG1_DM_PULLDOWN (1 << 3)
+# define OTG1_ID_PULLDOWN (1 << 4)
+# define OTG1_VBUS_DRV (1 << 5)
+# define OTG1_VBUS_DISCHRG (1 << 6)
+# define OTG1_VBUS_CHRG (1 << 7)
+#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
+# define OTG_B_SESS_END (1 << 6)
+# define OTG_B_SESS_VLD (1 << 7)
+
+#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
+#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
+
+#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
+#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
+
+/* same bitfields in all interrupt registers */
+# define INTR_VBUS_VLD (1 << 0)
+# define INTR_SESS_VLD (1 << 1)
+# define INTR_DP_HI (1 << 2)
+# define INTR_ID_GND (1 << 3)
+# define INTR_DM_HI (1 << 4)
+# define INTR_ID_FLOAT (1 << 5)
+# define INTR_BDIS_ACON (1 << 6)
+# define INTR_CR_INT (1 << 7)
+
+/*-------------------------------------------------------------------------*/
+
+static const char *state_string(enum usb_otg_state state)
+{
+ switch (state) {
+ case OTG_STATE_A_IDLE: return "a_idle";
+ case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
+ case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
+ case OTG_STATE_A_HOST: return "a_host";
+ case OTG_STATE_A_SUSPEND: return "a_suspend";
+ case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
+ case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
+ case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
+ case OTG_STATE_B_IDLE: return "b_idle";
+ case OTG_STATE_B_SRP_INIT: return "b_srp_init";
+ case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
+ case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
+ case OTG_STATE_B_HOST: return "b_host";
+ default: return "UNDEFINED";
+ }
+}
+
+static inline const char *state_name(struct isp1301 *isp)
+{
+ return state_string(isp->otg.state);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* NOTE: some of this ISP1301 setup is specific to H2 boards;
+ * not everything is guarded by board-specific checks, or even using
+ * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
+ *
+ * ALSO: this currently doesn't use ISP1301 low-power modes
+ * while OTG is running.
+ */
+
+static void power_down(struct isp1301 *isp)
+{
+ isp->otg.state = OTG_STATE_UNDEFINED;
+
+ // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
+
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+}
+
+static void power_up(struct isp1301 *isp)
+{
+ // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
+
+ /* do this only when cpu is driving transceiver,
+ * so host won't see a low speed device...
+ */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+}
+
+#define NO_HOST_SUSPEND
+
+static int host_suspend(struct isp1301 *isp)
+{
+#ifdef NO_HOST_SUSPEND
+ return 0;
+#else
+ struct device *dev;
+
+ if (!isp->otg.host)
+ return -ENODEV;
+
+ /* Currently ASSUMES only the OTG port matters;
+ * other ports could be active...
+ */
+ dev = isp->otg.host->controller;
+ return dev->driver->suspend(dev, 3, 0);
+#endif
+}
+
+static int host_resume(struct isp1301 *isp)
+{
+#ifdef NO_HOST_SUSPEND
+ return 0;
+#else
+ struct device *dev;
+
+ if (!isp->otg.host)
+ return -ENODEV;
+
+ dev = isp->otg.host->controller;
+ return dev->driver->resume(dev, 0);
+#endif
+}
+
+static int gadget_suspend(struct isp1301 *isp)
+{
+ isp->otg.gadget->b_hnp_enable = 0;
+ isp->otg.gadget->a_hnp_support = 0;
+ isp->otg.gadget->a_alt_hnp_support = 0;
+ return usb_gadget_vbus_disconnect(isp->otg.gadget);
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define TIMER_MINUTES 10
+#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
+
+/* Almost all our I2C messaging comes from a work queue's task context.
+ * NOTE: guaranteeing certain response times might mean we shouldn't
+ * share keventd's work queue; a realtime task might be safest.
+ */
+static void isp1301_defer_work(struct isp1301 *isp, int work)
+{
+ int status;
+
+ if (isp && !test_and_set_bit(work, &isp->todo)) {
+ (void) get_device(&isp->client->dev);
+ status = schedule_work(&isp->work);
+ if (!status && !isp->working)
+ dev_vdbg(&isp->client->dev,
+ "work item %d may be lost\n", work);
+ }
+}
+
+/* called from irq handlers */
+static void a_idle(struct isp1301 *isp, const char *tag)
+{
+ u32 l;
+
+ if (isp->otg.state == OTG_STATE_A_IDLE)
+ return;
+
+ isp->otg.default_a = 1;
+ if (isp->otg.host) {
+ isp->otg.host->is_b_host = 0;
+ host_suspend(isp);
+ }
+ if (isp->otg.gadget) {
+ isp->otg.gadget->is_a_peripheral = 1;
+ gadget_suspend(isp);
+ }
+ isp->otg.state = OTG_STATE_A_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ isp->last_otg_ctrl = l;
+ pr_debug(" --> %s/%s\n", state_name(isp), tag);
+}
+
+/* called from irq handlers */
+static void b_idle(struct isp1301 *isp, const char *tag)
+{
+ u32 l;
+
+ if (isp->otg.state == OTG_STATE_B_IDLE)
+ return;
+
+ isp->otg.default_a = 0;
+ if (isp->otg.host) {
+ isp->otg.host->is_b_host = 1;
+ host_suspend(isp);
+ }
+ if (isp->otg.gadget) {
+ isp->otg.gadget->is_a_peripheral = 0;
+ gadget_suspend(isp);
+ }
+ isp->otg.state = OTG_STATE_B_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ isp->last_otg_ctrl = l;
+ pr_debug(" --> %s/%s\n", state_name(isp), tag);
+}
+
+static void
+dump_regs(struct isp1301 *isp, const char *label)
+{
+#ifdef DEBUG
+ u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
+ u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+ u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
+
+ pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
+ omap_readl(OTG_CTRL), label, state_name(isp),
+ ctrl, status, src);
+ /* mode control and irq enables don't change much */
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_OTG
+
+/*
+ * The OMAP OTG controller handles most of the OTG state transitions.
+ *
+ * We translate isp1301 outputs (mostly voltage comparator status) into
+ * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
+ * flags into isp1301 inputs ... and infer state transitions.
+ */
+
+#ifdef VERBOSE
+
+static void check_state(struct isp1301 *isp, const char *tag)
+{
+ enum usb_otg_state state = OTG_STATE_UNDEFINED;
+ u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
+ unsigned extra = 0;
+
+ switch (fsm) {
+
+ /* default-b */
+ case 0x0:
+ state = OTG_STATE_B_IDLE;
+ break;
+ case 0x3:
+ case 0x7:
+ extra = 1;
+ case 0x1:
+ state = OTG_STATE_B_PERIPHERAL;
+ break;
+ case 0x11:
+ state = OTG_STATE_B_SRP_INIT;
+ break;
+
+ /* extra dual-role default-b states */
+ case 0x12:
+ case 0x13:
+ case 0x16:
+ extra = 1;
+ case 0x17:
+ state = OTG_STATE_B_WAIT_ACON;
+ break;
+ case 0x34:
+ state = OTG_STATE_B_HOST;
+ break;
+
+ /* default-a */
+ case 0x36:
+ state = OTG_STATE_A_IDLE;
+ break;
+ case 0x3c:
+ state = OTG_STATE_A_WAIT_VFALL;
+ break;
+ case 0x7d:
+ state = OTG_STATE_A_VBUS_ERR;
+ break;
+ case 0x9e:
+ case 0x9f:
+ extra = 1;
+ case 0x89:
+ state = OTG_STATE_A_PERIPHERAL;
+ break;
+ case 0xb7:
+ state = OTG_STATE_A_WAIT_VRISE;
+ break;
+ case 0xb8:
+ state = OTG_STATE_A_WAIT_BCON;
+ break;
+ case 0xb9:
+ state = OTG_STATE_A_HOST;
+ break;
+ case 0xba:
+ state = OTG_STATE_A_SUSPEND;
+ break;
+ default:
+ break;
+ }
+ if (isp->otg.state == state && !extra)
+ return;
+ pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
+ state_string(state), fsm, state_name(isp),
+ omap_readl(OTG_CTRL));
+}
+
+#else
+
+static inline void check_state(struct isp1301 *isp, const char *tag) { }
+
+#endif
+
+/* outputs from ISP1301_INTERRUPT_SOURCE */
+static void update_otg1(struct isp1301 *isp, u8 int_src)
+{
+ u32 otg_ctrl;
+
+ otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ otg_ctrl &= ~OTG_XCEIV_INPUTS;
+ otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
+
+ if (int_src & INTR_SESS_VLD)
+ otg_ctrl |= OTG_ASESSVLD;
+ else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
+ a_idle(isp, "vfall");
+ otg_ctrl &= ~OTG_CTRL_BITS;
+ }
+ if (int_src & INTR_VBUS_VLD)
+ otg_ctrl |= OTG_VBUSVLD;
+ if (int_src & INTR_ID_GND) { /* default-A */
+ if (isp->otg.state == OTG_STATE_B_IDLE
+ || isp->otg.state == OTG_STATE_UNDEFINED) {
+ a_idle(isp, "init");
+ return;
+ }
+ } else { /* default-B */
+ otg_ctrl |= OTG_ID;
+ if (isp->otg.state == OTG_STATE_A_IDLE
+ || isp->otg.state == OTG_STATE_UNDEFINED) {
+ b_idle(isp, "init");
+ return;
+ }
+ }
+ omap_writel(otg_ctrl, OTG_CTRL);
+}
+
+/* outputs from ISP1301_OTG_STATUS */
+static void update_otg2(struct isp1301 *isp, u8 otg_status)
+{
+ u32 otg_ctrl;
+
+ otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ otg_ctrl &= ~OTG_XCEIV_INPUTS;
+ otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
+ if (otg_status & OTG_B_SESS_VLD)
+ otg_ctrl |= OTG_BSESSVLD;
+ else if (otg_status & OTG_B_SESS_END)
+ otg_ctrl |= OTG_BSESSEND;
+ omap_writel(otg_ctrl, OTG_CTRL);
+}
+
+/* inputs going to ISP1301 */
+static void otg_update_isp(struct isp1301 *isp)
+{
+ u32 otg_ctrl, otg_change;
+ u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_change = otg_ctrl ^ isp->last_otg_ctrl;
+ isp->last_otg_ctrl = otg_ctrl;
+ otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
+
+ switch (isp->otg.state) {
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_SRP_INIT:
+ if (!(otg_ctrl & OTG_PULLUP)) {
+ // if (otg_ctrl & OTG_B_HNPEN) {
+ if (isp->otg.gadget->b_hnp_enable) {
+ isp->otg.state = OTG_STATE_B_WAIT_ACON;
+ pr_debug(" --> b_wait_acon\n");
+ }
+ goto pulldown;
+ }
+pullup:
+ set |= OTG1_DP_PULLUP;
+ clr |= OTG1_DP_PULLDOWN;
+ break;
+ case OTG_STATE_A_SUSPEND:
+ case OTG_STATE_A_PERIPHERAL:
+ if (otg_ctrl & OTG_PULLUP)
+ goto pullup;
+ /* FALLTHROUGH */
+ // case OTG_STATE_B_WAIT_ACON:
+ default:
+pulldown:
+ set |= OTG1_DP_PULLDOWN;
+ clr |= OTG1_DP_PULLUP;
+ break;
+ }
+
+# define toggle(OTG,ISP) do { \
+ if (otg_ctrl & OTG) set |= ISP; \
+ else clr |= ISP; \
+ } while (0)
+
+ if (!(isp->otg.host))
+ otg_ctrl &= ~OTG_DRV_VBUS;
+
+ switch (isp->otg.state) {
+ case OTG_STATE_A_SUSPEND:
+ if (otg_ctrl & OTG_DRV_VBUS) {
+ set |= OTG1_VBUS_DRV;
+ break;
+ }
+ /* HNP failed for some reason (A_AIDL_BDIS timeout) */
+ notresponding(isp);
+
+ /* FALLTHROUGH */
+ case OTG_STATE_A_VBUS_ERR:
+ isp->otg.state = OTG_STATE_A_WAIT_VFALL;
+ pr_debug(" --> a_wait_vfall\n");
+ /* FALLTHROUGH */
+ case OTG_STATE_A_WAIT_VFALL:
+ /* FIXME usbcore thinks port power is still on ... */
+ clr |= OTG1_VBUS_DRV;
+ break;
+ case OTG_STATE_A_IDLE:
+ if (otg_ctrl & OTG_DRV_VBUS) {
+ isp->otg.state = OTG_STATE_A_WAIT_VRISE;
+ pr_debug(" --> a_wait_vrise\n");
+ }
+ /* FALLTHROUGH */
+ default:
+ toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
+ }
+
+ toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
+ toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
+
+# undef toggle
+
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
+
+ /* HNP switch to host or peripheral; and SRP */
+ if (otg_change & OTG_PULLUP) {
+ u32 l;
+
+ switch (isp->otg.state) {
+ case OTG_STATE_B_IDLE:
+ if (clr & OTG1_DP_PULLUP)
+ break;
+ isp->otg.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+ break;
+ case OTG_STATE_A_SUSPEND:
+ if (clr & OTG1_DP_PULLUP)
+ break;
+ isp->otg.state = OTG_STATE_A_PERIPHERAL;
+ pr_debug(" --> a_peripheral\n");
+ break;
+ default:
+ break;
+ }
+ l = omap_readl(OTG_CTRL);
+ l |= OTG_PULLUP;
+ omap_writel(l, OTG_CTRL);
+ }
+
+ check_state(isp, __func__);
+ dump_regs(isp, "otg->isp1301");
+}
+
+static irqreturn_t omap_otg_irq(int irq, void *_isp)
+{
+ u16 otg_irq = omap_readw(OTG_IRQ_SRC);
+ u32 otg_ctrl;
+ int ret = IRQ_NONE;
+ struct isp1301 *isp = _isp;
+
+ /* update ISP1301 transciever from OTG controller */
+ if (otg_irq & OPRT_CHG) {
+ omap_writew(OPRT_CHG, OTG_IRQ_SRC);
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+ ret = IRQ_HANDLED;
+
+ /* SRP to become b_peripheral failed */
+ } else if (otg_irq & B_SRP_TMROUT) {
+ pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
+ notresponding(isp);
+
+ /* gadget drivers that care should monitor all kinds of
+ * remote wakeup (SRP, normal) using their own timer
+ * to give "check cable and A-device" messages.
+ */
+ if (isp->otg.state == OTG_STATE_B_SRP_INIT)
+ b_idle(isp, "srp_timeout");
+
+ omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* HNP to become b_host failed */
+ } else if (otg_irq & B_HNP_FAIL) {
+ pr_debug("otg: %s B_HNP_FAIL, %06x\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+ notresponding(isp);
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+
+ /* subset of b_peripheral()... */
+ isp->otg.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+
+ omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* detect SRP from B-device ... */
+ } else if (otg_irq & A_SRP_DETECT) {
+ pr_debug("otg: %s SRP_DETECT, %06x\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+
+ isp1301_defer_work(isp, WORK_UPDATE_OTG);
+ switch (isp->otg.state) {
+ case OTG_STATE_A_IDLE:
+ if (!isp->otg.host)
+ break;
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_A_BUSREQ;
+ otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
+ & ~OTG_XCEIV_INPUTS
+ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ break;
+ default:
+ break;
+ }
+
+ omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
+ * we don't track them separately
+ */
+ } else if (otg_irq & A_REQ_TMROUT) {
+ otg_ctrl = omap_readl(OTG_CTRL);
+ pr_info("otg: BCON_TMOUT from %s, %06x\n",
+ state_name(isp), otg_ctrl);
+ notresponding(isp);
+
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->otg.state = OTG_STATE_A_WAIT_VFALL;
+
+ omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* A-supplied voltage fell too low; overcurrent */
+ } else if (otg_irq & A_VBUS_ERR) {
+ otg_ctrl = omap_readl(OTG_CTRL);
+ printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
+ state_name(isp), otg_irq, otg_ctrl);
+
+ otg_ctrl |= OTG_BUSDROP;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->otg.state = OTG_STATE_A_VBUS_ERR;
+
+ omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ /* switch driver; the transciever code activates it,
+ * ungating the udc clock or resuming OHCI.
+ */
+ } else if (otg_irq & DRIVER_SWITCH) {
+ int kick = 0;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
+ state_name(isp),
+ (otg_ctrl & OTG_DRIVER_SEL)
+ ? "gadget" : "host",
+ otg_ctrl);
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+
+ /* role is peripheral */
+ if (otg_ctrl & OTG_DRIVER_SEL) {
+ switch (isp->otg.state) {
+ case OTG_STATE_A_IDLE:
+ b_idle(isp, __func__);
+ break;
+ default:
+ break;
+ }
+ isp1301_defer_work(isp, WORK_UPDATE_ISP);
+
+ /* role is host */
+ } else {
+ if (!(otg_ctrl & OTG_ID)) {
+ otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
+ omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
+ }
+
+ if (isp->otg.host) {
+ switch (isp->otg.state) {
+ case OTG_STATE_B_WAIT_ACON:
+ isp->otg.state = OTG_STATE_B_HOST;
+ pr_debug(" --> b_host\n");
+ kick = 1;
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ isp->otg.state = OTG_STATE_A_HOST;
+ pr_debug(" --> a_host\n");
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ isp->otg.state = OTG_STATE_A_WAIT_BCON;
+ pr_debug(" --> a_wait_bcon\n");
+ break;
+ default:
+ break;
+ }
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ }
+ }
+
+ omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
+ ret = IRQ_HANDLED;
+
+ if (kick)
+ usb_bus_start_enum(isp->otg.host,
+ isp->otg.host->otg_port);
+ }
+
+ check_state(isp, __func__);
+ return ret;
+}
+
+static struct platform_device *otg_dev;
+
+static int otg_init(struct isp1301 *isp)
+{
+ u32 l;
+
+ if (!otg_dev)
+ return -ENODEV;
+
+ dump_regs(isp, __func__);
+ /* some of these values are board-specific... */
+ l = omap_readl(OTG_SYSCON_2);
+ l |= OTG_EN
+ /* for B-device: */
+ | SRP_GPDATA /* 9msec Bdev D+ pulse */
+ | SRP_GPDVBUS /* discharge after VBUS pulse */
+ // | (3 << 24) /* 2msec VBUS pulse */
+ /* for A-device: */
+ | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
+ | SRP_DPW /* detect 167+ns SRP pulses */
+ | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
+ ;
+ omap_writel(l, OTG_SYSCON_2);
+
+ update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
+ update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
+
+ check_state(isp, __func__);
+ pr_debug("otg: %s, %s %06x\n",
+ state_name(isp), __func__, omap_readl(OTG_CTRL));
+
+ omap_writew(DRIVER_SWITCH | OPRT_CHG
+ | B_SRP_TMROUT | B_HNP_FAIL
+ | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
+
+ l = omap_readl(OTG_SYSCON_2);
+ l |= OTG_EN;
+ omap_writel(l, OTG_SYSCON_2);
+
+ return 0;
+}
+
+static int otg_probe(struct platform_device *dev)
+{
+ // struct omap_usb_config *config = dev->platform_data;
+
+ otg_dev = dev;
+ return 0;
+}
+
+static int otg_remove(struct platform_device *dev)
+{
+ otg_dev = NULL;
+ return 0;
+}
+
+static struct platform_driver omap_otg_driver = {
+ .probe = otg_probe,
+ .remove = otg_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "omap_otg",
+ },
+};
+
+static int otg_bind(struct isp1301 *isp)
+{
+ int status;
+
+ if (otg_dev)
+ return -EBUSY;
+
+ status = platform_driver_register(&omap_otg_driver);
+ if (status < 0)
+ return status;
+
+ if (otg_dev)
+ status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
+ IRQF_DISABLED, DRIVER_NAME, isp);
+ else
+ status = -ENODEV;
+
+ if (status < 0)
+ platform_driver_unregister(&omap_otg_driver);
+ return status;
+}
+
+static void otg_unbind(struct isp1301 *isp)
+{
+ if (!otg_dev)
+ return;
+ free_irq(otg_dev->resource[1].start, isp);
+}
+
+#else
+
+/* OTG controller isn't clocked */
+
+#endif /* CONFIG_USB_OTG */
+
+/*-------------------------------------------------------------------------*/
+
+static void b_peripheral(struct isp1301 *isp)
+{
+ u32 l;
+
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+
+ usb_gadget_vbus_connect(isp->otg.gadget);
+
+#ifdef CONFIG_USB_OTG
+ enable_vbus_draw(isp, 8);
+ otg_update_isp(isp);
+#else
+ enable_vbus_draw(isp, 100);
+ /* UDC driver just set OTG_BSESSVLD */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
+ isp->otg.state = OTG_STATE_B_PERIPHERAL;
+ pr_debug(" --> b_peripheral\n");
+ dump_regs(isp, "2periph");
+#endif
+}
+
+static void isp_update_otg(struct isp1301 *isp, u8 stat)
+{
+ u8 isp_stat, isp_bstat;
+ enum usb_otg_state state = isp->otg.state;
+
+ if (stat & INTR_BDIS_ACON)
+ pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
+
+ /* start certain state transitions right away */
+ isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
+ if (isp_stat & INTR_ID_GND) {
+ if (isp->otg.default_a) {
+ switch (state) {
+ case OTG_STATE_B_IDLE:
+ a_idle(isp, "idle");
+ /* FALLTHROUGH */
+ case OTG_STATE_A_IDLE:
+ enable_vbus_source(isp);
+ /* FALLTHROUGH */
+ case OTG_STATE_A_WAIT_VRISE:
+ /* we skip over OTG_STATE_A_WAIT_BCON, since
+ * the HC will transition to A_HOST (or
+ * A_SUSPEND!) without our noticing except
+ * when HNP is used.
+ */
+ if (isp_stat & INTR_VBUS_VLD)
+ isp->otg.state = OTG_STATE_A_HOST;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ if (!(isp_stat & INTR_SESS_VLD))
+ a_idle(isp, "vfell");
+ break;
+ default:
+ if (!(isp_stat & INTR_VBUS_VLD))
+ isp->otg.state = OTG_STATE_A_VBUS_ERR;
+ break;
+ }
+ isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+ } else {
+ switch (state) {
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_HOST:
+ case OTG_STATE_B_WAIT_ACON:
+ usb_gadget_vbus_disconnect(isp->otg.gadget);
+ break;
+ default:
+ break;
+ }
+ if (state != OTG_STATE_A_IDLE)
+ a_idle(isp, "id");
+ if (isp->otg.host && state == OTG_STATE_A_IDLE)
+ isp1301_defer_work(isp, WORK_HOST_RESUME);
+ isp_bstat = 0;
+ }
+ } else {
+ u32 l;
+
+ /* if user unplugged mini-A end of cable,
+ * don't bypass A_WAIT_VFALL.
+ */
+ if (isp->otg.default_a) {
+ switch (state) {
+ default:
+ isp->otg.state = OTG_STATE_A_WAIT_VFALL;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ state = OTG_STATE_A_IDLE;
+ /* khubd may take a while to notice and
+ * handle this disconnect, so don't go
+ * to B_IDLE quite yet.
+ */
+ break;
+ case OTG_STATE_A_IDLE:
+ host_suspend(isp);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_BDIS_ACON_EN);
+ isp->otg.state = OTG_STATE_B_IDLE;
+ l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ l &= ~OTG_CTRL_BITS;
+ omap_writel(l, OTG_CTRL);
+ break;
+ case OTG_STATE_B_IDLE:
+ break;
+ }
+ }
+ isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
+
+ switch (isp->otg.state) {
+ case OTG_STATE_B_PERIPHERAL:
+ case OTG_STATE_B_WAIT_ACON:
+ case OTG_STATE_B_HOST:
+ if (likely(isp_bstat & OTG_B_SESS_VLD))
+ break;
+ enable_vbus_draw(isp, 0);
+#ifndef CONFIG_USB_OTG
+ /* UDC driver will clear OTG_BSESSVLD */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DP_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DP_PULLUP);
+ dump_regs(isp, __func__);
+#endif
+ /* FALLTHROUGH */
+ case OTG_STATE_B_SRP_INIT:
+ b_idle(isp, __func__);
+ l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
+ omap_writel(l, OTG_CTRL);
+ /* FALLTHROUGH */
+ case OTG_STATE_B_IDLE:
+ if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
+#ifdef CONFIG_USB_OTG
+ update_otg1(isp, isp_stat);
+ update_otg2(isp, isp_bstat);
+#endif
+ b_peripheral(isp);
+ } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
+ isp_bstat |= OTG_B_SESS_END;
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ break;
+ default:
+ pr_debug("otg: unsupported b-device %s\n",
+ state_name(isp));
+ break;
+ }
+ }
+
+ if (state != isp->otg.state)
+ pr_debug(" isp, %s -> %s\n",
+ state_string(state), state_name(isp));
+
+#ifdef CONFIG_USB_OTG
+ /* update the OTG controller state to match the isp1301; may
+ * trigger OPRT_CHG irqs for changes going to the isp1301.
+ */
+ update_otg1(isp, isp_stat);
+ update_otg2(isp, isp_bstat);
+ check_state(isp, __func__);
+#endif
+
+ dump_regs(isp, "isp1301->otg");
+}
+
+/*-------------------------------------------------------------------------*/
+
+static u8 isp1301_clear_latch(struct isp1301 *isp)
+{
+ u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
+ return latch;
+}
+
+static void
+isp1301_work(struct work_struct *work)
+{
+ struct isp1301 *isp = container_of(work, struct isp1301, work);
+ int stop;
+
+ /* implicit lock: we're the only task using this device */
+ isp->working = 1;
+ do {
+ stop = test_bit(WORK_STOP, &isp->todo);
+
+#ifdef CONFIG_USB_OTG
+ /* transfer state from otg engine to isp1301 */
+ if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
+ otg_update_isp(isp);
+ put_device(&isp->client->dev);
+ }
+#endif
+ /* transfer state from isp1301 to otg engine */
+ if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
+ u8 stat = isp1301_clear_latch(isp);
+
+ isp_update_otg(isp, stat);
+ put_device(&isp->client->dev);
+ }
+
+ if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
+ u32 otg_ctrl;
+
+ /*
+ * skip A_WAIT_VRISE; hc transitions invisibly
+ * skip A_WAIT_BCON; same.
+ */
+ switch (isp->otg.state) {
+ case OTG_STATE_A_WAIT_BCON:
+ case OTG_STATE_A_WAIT_VRISE:
+ isp->otg.state = OTG_STATE_A_HOST;
+ pr_debug(" --> a_host\n");
+ otg_ctrl = omap_readl(OTG_CTRL);
+ otg_ctrl |= OTG_A_BUSREQ;
+ otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
+ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ isp->otg.state = OTG_STATE_B_HOST;
+ pr_debug(" --> b_host (acon)\n");
+ break;
+ case OTG_STATE_B_HOST:
+ case OTG_STATE_B_IDLE:
+ case OTG_STATE_A_IDLE:
+ break;
+ default:
+ pr_debug(" host resume in %s\n",
+ state_name(isp));
+ }
+ host_resume(isp);
+ // mdelay(10);
+ put_device(&isp->client->dev);
+ }
+
+ if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
+#ifdef VERBOSE
+ dump_regs(isp, "timer");
+ if (!stop)
+ mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
+#endif
+ put_device(&isp->client->dev);
+ }
+
+ if (isp->todo)
+ dev_vdbg(&isp->client->dev,
+ "work done, todo = 0x%lx\n",
+ isp->todo);
+ if (stop) {
+ dev_dbg(&isp->client->dev, "stop\n");
+ break;
+ }
+ } while (isp->todo);
+ isp->working = 0;
+}
+
+static irqreturn_t isp1301_irq(int irq, void *isp)
+{
+ isp1301_defer_work(isp, WORK_UPDATE_OTG);
+ return IRQ_HANDLED;
+}
+
+static void isp1301_timer(unsigned long _isp)
+{
+ isp1301_defer_work((void *)_isp, WORK_TIMER);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void isp1301_release(struct device *dev)
+{
+ struct isp1301 *isp;
+
+ isp = dev_get_drvdata(dev);
+
+ /* FIXME -- not with a "new style" driver, it doesn't!! */
+
+ /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
+ if (isp->i2c_release)
+ isp->i2c_release(dev);
+ kfree (isp);
+}
+
+static struct isp1301 *the_transceiver;
+
+static int __exit isp1301_remove(struct i2c_client *i2c)
+{
+ struct isp1301 *isp;
+
+ isp = i2c_get_clientdata(i2c);
+
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
+ free_irq(i2c->irq, isp);
+#ifdef CONFIG_USB_OTG
+ otg_unbind(isp);
+#endif
+ if (machine_is_omap_h2())
+ gpio_free(2);
+
+ isp->timer.data = 0;
+ set_bit(WORK_STOP, &isp->todo);
+ del_timer_sync(&isp->timer);
+ flush_scheduled_work();
+
+ put_device(&i2c->dev);
+ the_transceiver = NULL;
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* NOTE: three modes are possible here, only one of which
+ * will be standards-conformant on any given system:
+ *
+ * - OTG mode (dual-role), required if there's a Mini-AB connector
+ * - HOST mode, for when there's one or more A (host) connectors
+ * - DEVICE mode, for when there's a B/Mini-B (device) connector
+ *
+ * As a rule, you won't have an isp1301 chip unless it's there to
+ * support the OTG mode. Other modes help testing USB controllers
+ * in isolation from (full) OTG support, or maybe so later board
+ * revisions can help to support those feature.
+ */
+
+#ifdef CONFIG_USB_OTG
+
+static int isp1301_otg_enable(struct isp1301 *isp)
+{
+ power_up(isp);
+ otg_init(isp);
+
+ /* NOTE: since we don't change this, this provides
+ * a few more interrupts than are strictly needed.
+ */
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
+
+ dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
+
+ return 0;
+}
+
+#endif
+
+/* add or disable the host device+driver */
+static int
+isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
+{
+ struct isp1301 *isp = container_of(otg, struct isp1301, otg);
+
+ if (!otg || isp != the_transceiver)
+ return -ENODEV;
+
+ if (!host) {
+ omap_writew(0, OTG_IRQ_EN);
+ power_down(isp);
+ isp->otg.host = NULL;
+ return 0;
+ }
+
+#ifdef CONFIG_USB_OTG
+ isp->otg.host = host;
+ dev_dbg(&isp->client->dev, "registered host\n");
+ host_suspend(isp);
+ if (isp->otg.gadget)
+ return isp1301_otg_enable(isp);
+ return 0;
+
+#elif !defined(CONFIG_USB_GADGET_OMAP)
+ // FIXME update its refcount
+ isp->otg.host = host;
+
+ power_up(isp);
+
+ if (machine_is_omap_h2())
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+
+ dev_info(&isp->client->dev, "A-Host sessions ok\n");
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_ID_GND);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_ID_GND);
+
+ /* If this has a Mini-AB connector, this mode is highly
+ * nonstandard ... but can be handy for testing, especially with
+ * the Mini-A end of an OTG cable. (Or something nonstandard
+ * like MiniB-to-StandardB, maybe built with a gender mender.)
+ */
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
+
+ dump_regs(isp, __func__);
+
+ return 0;
+
+#else
+ dev_dbg(&isp->client->dev, "host sessions not allowed\n");
+ return -EINVAL;
+#endif
+
+}
+
+static int
+isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
+{
+ struct isp1301 *isp = container_of(otg, struct isp1301, otg);
+#ifndef CONFIG_USB_OTG
+ u32 l;
+#endif
+
+ if (!otg || isp != the_transceiver)
+ return -ENODEV;
+
+ if (!gadget) {
+ omap_writew(0, OTG_IRQ_EN);
+ if (!isp->otg.default_a)
+ enable_vbus_draw(isp, 0);
+ usb_gadget_vbus_disconnect(isp->otg.gadget);
+ isp->otg.gadget = NULL;
+ power_down(isp);
+ return 0;
+ }
+
+#ifdef CONFIG_USB_OTG
+ isp->otg.gadget = gadget;
+ dev_dbg(&isp->client->dev, "registered gadget\n");
+ /* gadget driver may be suspended until vbus_connect () */
+ if (isp->otg.host)
+ return isp1301_otg_enable(isp);
+ return 0;
+
+#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
+ isp->otg.gadget = gadget;
+ // FIXME update its refcount
+
+ l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+ l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
+ l |= OTG_ID;
+ omap_writel(l, OTG_CTRL);
+
+ power_up(isp);
+ isp->otg.state = OTG_STATE_B_IDLE;
+
+ if (machine_is_omap_h2() || machine_is_omap_h3())
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
+
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
+ INTR_SESS_VLD);
+ isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
+ INTR_VBUS_VLD);
+ dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
+ dump_regs(isp, __func__);
+
+ /* If this has a Mini-AB connector, this mode is highly
+ * nonstandard ... but can be handy for testing, so long
+ * as you don't plug a Mini-A cable into the jack.
+ */
+ if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
+ b_peripheral(isp);
+
+ return 0;
+
+#else
+ dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
+ return -EINVAL;
+#endif
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int
+isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
+{
+ if (!the_transceiver)
+ return -ENODEV;
+ if (dev->state == OTG_STATE_B_PERIPHERAL)
+ enable_vbus_draw(the_transceiver, mA);
+ return 0;
+}
+
+static int
+isp1301_start_srp(struct otg_transceiver *dev)
+{
+ struct isp1301 *isp = container_of(dev, struct isp1301, otg);
+ u32 otg_ctrl;
+
+ if (!dev || isp != the_transceiver
+ || isp->otg.state != OTG_STATE_B_IDLE)
+ return -ENODEV;
+
+ otg_ctrl = omap_readl(OTG_CTRL);
+ if (!(otg_ctrl & OTG_BSESSEND))
+ return -EINVAL;
+
+ otg_ctrl |= OTG_B_BUSREQ;
+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
+ omap_writel(otg_ctrl, OTG_CTRL);
+ isp->otg.state = OTG_STATE_B_SRP_INIT;
+
+ pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
+ omap_readl(OTG_CTRL));
+#ifdef CONFIG_USB_OTG
+ check_state(isp, __func__);
+#endif
+ return 0;
+}
+
+static int
+isp1301_start_hnp(struct otg_transceiver *dev)
+{
+#ifdef CONFIG_USB_OTG
+ struct isp1301 *isp = container_of(dev, struct isp1301, otg);
+ u32 l;
+
+ if (!dev || isp != the_transceiver)
+ return -ENODEV;
+ if (isp->otg.default_a && (isp->otg.host == NULL
+ || !isp->otg.host->b_hnp_enable))
+ return -ENOTCONN;
+ if (!isp->otg.default_a && (isp->otg.gadget == NULL
+ || !isp->otg.gadget->b_hnp_enable))
+ return -ENOTCONN;
+
+ /* We want hardware to manage most HNP protocol timings.
+ * So do this part as early as possible...
+ */
+ switch (isp->otg.state) {
+ case OTG_STATE_B_HOST:
+ isp->otg.state = OTG_STATE_B_PERIPHERAL;
+ /* caller will suspend next */
+ break;
+ case OTG_STATE_A_HOST:
+#if 0
+ /* autoconnect mode avoids irq latency bugs */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_BDIS_ACON_EN);
+#endif
+ /* caller must suspend then clear A_BUSREQ */
+ usb_gadget_vbus_connect(isp->otg.gadget);
+ l = omap_readl(OTG_CTRL);
+ l |= OTG_A_SETB_HNPEN;
+ omap_writel(l, OTG_CTRL);
+
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ /* initiated by B-Host suspend */
+ break;
+ default:
+ return -EILSEQ;
+ }
+ pr_debug("otg: HNP %s, %06x ...\n",
+ state_name(isp), omap_readl(OTG_CTRL));
+ check_state(isp, __func__);
+ return 0;
+#else
+ /* srp-only */
+ return -EINVAL;
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __init
+isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+ int status;
+ struct isp1301 *isp;
+
+ if (the_transceiver)
+ return 0;
+
+ isp = kzalloc(sizeof *isp, GFP_KERNEL);
+ if (!isp)
+ return 0;
+
+ INIT_WORK(&isp->work, isp1301_work);
+ init_timer(&isp->timer);
+ isp->timer.function = isp1301_timer;
+ isp->timer.data = (unsigned long) isp;
+
+ i2c_set_clientdata(i2c, isp);
+ isp->client = i2c;
+
+ /* verify the chip (shouldn't be necesary) */
+ status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
+ if (status != I2C_VENDOR_ID_PHILIPS) {
+ dev_dbg(&i2c->dev, "not philips id: %d\n", status);
+ goto fail;
+ }
+ status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
+ if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
+ dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
+ goto fail;
+ }
+ isp->i2c_release = i2c->dev.release;
+ i2c->dev.release = isp1301_release;
+
+ /* initial development used chiprev 2.00 */
+ status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
+ dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
+ status >> 8, status & 0xff);
+
+ /* make like power-on reset */
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
+
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
+ isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
+
+ isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
+ OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
+ isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
+ ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
+
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
+ isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
+
+#ifdef CONFIG_USB_OTG
+ status = otg_bind(isp);
+ if (status < 0) {
+ dev_dbg(&i2c->dev, "can't bind OTG\n");
+ goto fail;
+ }
+#endif
+
+ if (machine_is_omap_h2()) {
+ /* full speed signaling by default */
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
+ MC1_SPEED);
+ isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
+ MC2_SPD_SUSP_CTRL);
+
+ /* IRQ wired at M14 */
+ omap_cfg_reg(M14_1510_GPIO2);
+ if (gpio_request(2, "isp1301") == 0)
+ gpio_direction_input(2);
+ isp->irq_type = IRQF_TRIGGER_FALLING;
+ }
+
+ isp->irq_type |= IRQF_SAMPLE_RANDOM;
+ status = request_irq(i2c->irq, isp1301_irq,
+ isp->irq_type, DRIVER_NAME, isp);
+ if (status < 0) {
+ dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
+ i2c->irq, status);
+ goto fail;
+ }
+
+ isp->otg.dev = &i2c->dev;
+ isp->otg.label = DRIVER_NAME;
+
+ isp->otg.set_host = isp1301_set_host,
+ isp->otg.set_peripheral = isp1301_set_peripheral,
+ isp->otg.set_power = isp1301_set_power,
+ isp->otg.start_srp = isp1301_start_srp,
+ isp->otg.start_hnp = isp1301_start_hnp,
+
+ enable_vbus_draw(isp, 0);
+ power_down(isp);
+ the_transceiver = isp;
+
+#ifdef CONFIG_USB_OTG
+ update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
+ update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
+#endif
+
+ dump_regs(isp, __func__);
+
+#ifdef VERBOSE
+ mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
+ dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
+#endif
+
+ status = otg_set_transceiver(&isp->otg);
+ if (status < 0)
+ dev_err(&i2c->dev, "can't register transceiver, %d\n",
+ status);
+
+ return 0;
+
+fail:
+ kfree(isp);
+ return -ENODEV;
+}
+
+static const struct i2c_device_id isp1301_id[] = {
+ { "isp1301_omap", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, isp1301_id);
+
+static struct i2c_driver isp1301_driver = {
+ .driver = {
+ .name = "isp1301_omap",
+ },
+ .probe = isp1301_probe,
+ .remove = __exit_p(isp1301_remove),
+ .id_table = isp1301_id,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int __init isp_init(void)
+{
+ return i2c_add_driver(&isp1301_driver);
+}
+module_init(isp_init);
+
+static void __exit isp_exit(void)
+{
+ if (the_transceiver)
+ otg_set_transceiver(NULL);
+ i2c_del_driver(&isp1301_driver);
+}
+module_exit(isp_exit);
+
diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c
new file mode 100644
index 00000000000..ff318fae7d4
--- /dev/null
+++ b/drivers/usb/otg/otg.c
@@ -0,0 +1,65 @@
+/*
+ * otg.c -- USB OTG utility code
+ *
+ * Copyright (C) 2004 Texas Instruments
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+
+#include <linux/usb/otg.h>
+
+static struct otg_transceiver *xceiv;
+
+/**
+ * otg_get_transceiver - find the (single) OTG transceiver
+ *
+ * Returns the transceiver driver, after getting a refcount to it; or
+ * null if there is no such transceiver. The caller is responsible for
+ * calling otg_put_transceiver() to release that count.
+ *
+ * For use by USB host and peripheral drivers.
+ */
+struct otg_transceiver *otg_get_transceiver(void)
+{
+ if (xceiv)
+ get_device(xceiv->dev);
+ return xceiv;
+}
+EXPORT_SYMBOL(otg_get_transceiver);
+
+/**
+ * otg_put_transceiver - release the (single) OTG transceiver
+ * @x: the transceiver returned by otg_get_transceiver()
+ *
+ * Releases a refcount the caller received from otg_get_transceiver().
+ *
+ * For use by USB host and peripheral drivers.
+ */
+void otg_put_transceiver(struct otg_transceiver *x)
+{
+ put_device(x->dev);
+}
+EXPORT_SYMBOL(otg_put_transceiver);
+
+/**
+ * otg_set_transceiver - declare the (single) OTG transceiver
+ * @x: the USB OTG transceiver to be used; or NULL
+ *
+ * This call is exclusively for use by transceiver drivers, which
+ * coordinate the activities of drivers for host and peripheral
+ * controllers, and in some cases for VBUS current regulation.
+ */
+int otg_set_transceiver(struct otg_transceiver *x)
+{
+ if (xceiv && x)
+ return -EBUSY;
+ xceiv = x;
+ return 0;
+}
+EXPORT_SYMBOL(otg_set_transceiver);
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
new file mode 100644
index 00000000000..416e4410be0
--- /dev/null
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -0,0 +1,721 @@
+/*
+ * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
+ *
+ * Copyright (C) 2004-2007 Texas Instruments
+ * Copyright (C) 2008 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.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:
+ * - HS USB ULPI mode works.
+ * - 3-pin mode support may be added in future.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/usb/otg.h>
+#include <linux/i2c/twl4030.h>
+
+
+/* Register defines */
+
+#define VENDOR_ID_LO 0x00
+#define VENDOR_ID_HI 0x01
+#define PRODUCT_ID_LO 0x02
+#define PRODUCT_ID_HI 0x03
+
+#define FUNC_CTRL 0x04
+#define FUNC_CTRL_SET 0x05
+#define FUNC_CTRL_CLR 0x06
+#define FUNC_CTRL_SUSPENDM (1 << 6)
+#define FUNC_CTRL_RESET (1 << 5)
+#define FUNC_CTRL_OPMODE_MASK (3 << 3) /* bits 3 and 4 */
+#define FUNC_CTRL_OPMODE_NORMAL (0 << 3)
+#define FUNC_CTRL_OPMODE_NONDRIVING (1 << 3)
+#define FUNC_CTRL_OPMODE_DISABLE_BIT_NRZI (2 << 3)
+#define FUNC_CTRL_TERMSELECT (1 << 2)
+#define FUNC_CTRL_XCVRSELECT_MASK (3 << 0) /* bits 0 and 1 */
+#define FUNC_CTRL_XCVRSELECT_HS (0 << 0)
+#define FUNC_CTRL_XCVRSELECT_FS (1 << 0)
+#define FUNC_CTRL_XCVRSELECT_LS (2 << 0)
+#define FUNC_CTRL_XCVRSELECT_FS4LS (3 << 0)
+
+#define IFC_CTRL 0x07
+#define IFC_CTRL_SET 0x08
+#define IFC_CTRL_CLR 0x09
+#define IFC_CTRL_INTERFACE_PROTECT_DISABLE (1 << 7)
+#define IFC_CTRL_AUTORESUME (1 << 4)
+#define IFC_CTRL_CLOCKSUSPENDM (1 << 3)
+#define IFC_CTRL_CARKITMODE (1 << 2)
+#define IFC_CTRL_FSLSSERIALMODE_3PIN (1 << 1)
+
+#define TWL4030_OTG_CTRL 0x0A
+#define TWL4030_OTG_CTRL_SET 0x0B
+#define TWL4030_OTG_CTRL_CLR 0x0C
+#define TWL4030_OTG_CTRL_DRVVBUS (1 << 5)
+#define TWL4030_OTG_CTRL_CHRGVBUS (1 << 4)
+#define TWL4030_OTG_CTRL_DISCHRGVBUS (1 << 3)
+#define TWL4030_OTG_CTRL_DMPULLDOWN (1 << 2)
+#define TWL4030_OTG_CTRL_DPPULLDOWN (1 << 1)
+#define TWL4030_OTG_CTRL_IDPULLUP (1 << 0)
+
+#define USB_INT_EN_RISE 0x0D
+#define USB_INT_EN_RISE_SET 0x0E
+#define USB_INT_EN_RISE_CLR 0x0F
+#define USB_INT_EN_FALL 0x10
+#define USB_INT_EN_FALL_SET 0x11
+#define USB_INT_EN_FALL_CLR 0x12
+#define USB_INT_STS 0x13
+#define USB_INT_LATCH 0x14
+#define USB_INT_IDGND (1 << 4)
+#define USB_INT_SESSEND (1 << 3)
+#define USB_INT_SESSVALID (1 << 2)
+#define USB_INT_VBUSVALID (1 << 1)
+#define USB_INT_HOSTDISCONNECT (1 << 0)
+
+#define CARKIT_CTRL 0x19
+#define CARKIT_CTRL_SET 0x1A
+#define CARKIT_CTRL_CLR 0x1B
+#define CARKIT_CTRL_MICEN (1 << 6)
+#define CARKIT_CTRL_SPKRIGHTEN (1 << 5)
+#define CARKIT_CTRL_SPKLEFTEN (1 << 4)
+#define CARKIT_CTRL_RXDEN (1 << 3)
+#define CARKIT_CTRL_TXDEN (1 << 2)
+#define CARKIT_CTRL_IDGNDDRV (1 << 1)
+#define CARKIT_CTRL_CARKITPWR (1 << 0)
+#define CARKIT_PLS_CTRL 0x22
+#define CARKIT_PLS_CTRL_SET 0x23
+#define CARKIT_PLS_CTRL_CLR 0x24
+#define CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3)
+#define CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2)
+#define CARKIT_PLS_CTRL_RXPLSEN (1 << 1)
+#define CARKIT_PLS_CTRL_TXPLSEN (1 << 0)
+
+#define MCPC_CTRL 0x30
+#define MCPC_CTRL_SET 0x31
+#define MCPC_CTRL_CLR 0x32
+#define MCPC_CTRL_RTSOL (1 << 7)
+#define MCPC_CTRL_EXTSWR (1 << 6)
+#define MCPC_CTRL_EXTSWC (1 << 5)
+#define MCPC_CTRL_VOICESW (1 << 4)
+#define MCPC_CTRL_OUT64K (1 << 3)
+#define MCPC_CTRL_RTSCTSSW (1 << 2)
+#define MCPC_CTRL_HS_UART (1 << 0)
+
+#define MCPC_IO_CTRL 0x33
+#define MCPC_IO_CTRL_SET 0x34
+#define MCPC_IO_CTRL_CLR 0x35
+#define MCPC_IO_CTRL_MICBIASEN (1 << 5)
+#define MCPC_IO_CTRL_CTS_NPU (1 << 4)
+#define MCPC_IO_CTRL_RXD_PU (1 << 3)
+#define MCPC_IO_CTRL_TXDTYP (1 << 2)
+#define MCPC_IO_CTRL_CTSTYP (1 << 1)
+#define MCPC_IO_CTRL_RTSTYP (1 << 0)
+
+#define MCPC_CTRL2 0x36
+#define MCPC_CTRL2_SET 0x37
+#define MCPC_CTRL2_CLR 0x38
+#define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
+
+#define OTHER_FUNC_CTRL 0x80
+#define OTHER_FUNC_CTRL_SET 0x81
+#define OTHER_FUNC_CTRL_CLR 0x82
+#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
+#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
+
+#define OTHER_IFC_CTRL 0x83
+#define OTHER_IFC_CTRL_SET 0x84
+#define OTHER_IFC_CTRL_CLR 0x85
+#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
+#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
+#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
+#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
+#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
+#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
+
+#define OTHER_INT_EN_RISE 0x86
+#define OTHER_INT_EN_RISE_SET 0x87
+#define OTHER_INT_EN_RISE_CLR 0x88
+#define OTHER_INT_EN_FALL 0x89
+#define OTHER_INT_EN_FALL_SET 0x8A
+#define OTHER_INT_EN_FALL_CLR 0x8B
+#define OTHER_INT_STS 0x8C
+#define OTHER_INT_LATCH 0x8D
+#define OTHER_INT_VB_SESS_VLD (1 << 7)
+#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
+#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
+#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
+#define OTHER_INT_MANU (1 << 1)
+#define OTHER_INT_ABNORMAL_STRESS (1 << 0)
+
+#define ID_STATUS 0x96
+#define ID_RES_FLOAT (1 << 4)
+#define ID_RES_440K (1 << 3)
+#define ID_RES_200K (1 << 2)
+#define ID_RES_102K (1 << 1)
+#define ID_RES_GND (1 << 0)
+
+#define POWER_CTRL 0xAC
+#define POWER_CTRL_SET 0xAD
+#define POWER_CTRL_CLR 0xAE
+#define POWER_CTRL_OTG_ENAB (1 << 5)
+
+#define OTHER_IFC_CTRL2 0xAF
+#define OTHER_IFC_CTRL2_SET 0xB0
+#define OTHER_IFC_CTRL2_CLR 0xB1
+#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
+#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
+#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
+
+#define REG_CTRL_EN 0xB2
+#define REG_CTRL_EN_SET 0xB3
+#define REG_CTRL_EN_CLR 0xB4
+#define REG_CTRL_ERROR 0xB5
+#define ULPI_I2C_CONFLICT_INTEN (1 << 0)
+
+#define OTHER_FUNC_CTRL2 0xB8
+#define OTHER_FUNC_CTRL2_SET 0xB9
+#define OTHER_FUNC_CTRL2_CLR 0xBA
+#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
+
+/* following registers do not have separate _clr and _set registers */
+#define VBUS_DEBOUNCE 0xC0
+#define ID_DEBOUNCE 0xC1
+#define VBAT_TIMER 0xD3
+#define PHY_PWR_CTRL 0xFD
+#define PHY_PWR_PHYPWD (1 << 0)
+#define PHY_CLK_CTRL 0xFE
+#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
+#define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
+#define REQ_PHY_DPLL_CLK (1 << 0)
+#define PHY_CLK_CTRL_STS 0xFF
+#define PHY_DPLL_CLK (1 << 0)
+
+/* In module TWL4030_MODULE_PM_MASTER */
+#define PROTECT_KEY 0x0E
+
+/* In module TWL4030_MODULE_PM_RECEIVER */
+#define VUSB_DEDICATED1 0x7D
+#define VUSB_DEDICATED2 0x7E
+#define VUSB1V5_DEV_GRP 0x71
+#define VUSB1V5_TYPE 0x72
+#define VUSB1V5_REMAP 0x73
+#define VUSB1V8_DEV_GRP 0x74
+#define VUSB1V8_TYPE 0x75
+#define VUSB1V8_REMAP 0x76
+#define VUSB3V1_DEV_GRP 0x77
+#define VUSB3V1_TYPE 0x78
+#define VUSB3V1_REMAP 0x79
+
+/* In module TWL4030_MODULE_INTBR */
+#define PMBR1 0x0D
+#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
+
+
+
+enum linkstat {
+ USB_LINK_UNKNOWN = 0,
+ USB_LINK_NONE,
+ USB_LINK_VBUS,
+ USB_LINK_ID,
+};
+
+struct twl4030_usb {
+ struct otg_transceiver otg;
+ struct device *dev;
+
+ /* for vbus reporting with irqs disabled */
+ spinlock_t lock;
+
+ /* pin configuration */
+ enum twl4030_usb_mode usb_mode;
+
+ int irq;
+ u8 linkstat;
+ u8 asleep;
+ bool irq_enabled;
+};
+
+/* internal define on top of container_of */
+#define xceiv_to_twl(x) container_of((x), struct twl4030_usb, otg);
+
+/*-------------------------------------------------------------------------*/
+
+static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
+ u8 module, u8 data, u8 address)
+{
+ u8 check;
+
+ if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
+ (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 1, module, address, check, data);
+
+ /* Failed once: Try again */
+ if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
+ (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 2, module, address, check, data);
+
+ /* Failed again: Return error */
+ return -EBUSY;
+}
+
+#define twl4030_usb_write_verify(twl, address, data) \
+ twl4030_i2c_write_u8_verify(twl, TWL4030_MODULE_USB, (data), (address))
+
+static inline int twl4030_usb_write(struct twl4030_usb *twl,
+ u8 address, u8 data)
+{
+ int ret = 0;
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_USB, data, address);
+ if (ret < 0)
+ dev_dbg(twl->dev,
+ "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
+ return ret;
+}
+
+static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
+{
+ u8 data;
+ int ret = 0;
+
+ ret = twl4030_i2c_read_u8(module, &data, address);
+ if (ret >= 0)
+ ret = data;
+ else
+ dev_dbg(twl->dev,
+ "TWL4030:readb[0x%x,0x%x] Error %d\n",
+ module, address, ret);
+
+ return ret;
+}
+
+static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
+{
+ return twl4030_readb(twl, TWL4030_MODULE_USB, address);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static inline int
+twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, reg + 1, bits);
+}
+
+static inline int
+twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, reg + 2, bits);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
+{
+ int status;
+ int linkstat = USB_LINK_UNKNOWN;
+
+ /* STS_HW_CONDITIONS */
+ status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER, 0x0f);
+ if (status < 0)
+ dev_err(twl->dev, "USB link status err %d\n", status);
+ else if (status & BIT(7))
+ linkstat = USB_LINK_VBUS;
+ else if (status & BIT(2))
+ linkstat = USB_LINK_ID;
+ else
+ linkstat = USB_LINK_NONE;
+
+ dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
+ status, status, linkstat);
+
+ /* REVISIT this assumes host and peripheral controllers
+ * are registered, and that both are active...
+ */
+
+ spin_lock_irq(&twl->lock);
+ twl->linkstat = linkstat;
+ if (linkstat == USB_LINK_ID) {
+ twl->otg.default_a = true;
+ twl->otg.state = OTG_STATE_A_IDLE;
+ } else {
+ twl->otg.default_a = false;
+ twl->otg.state = OTG_STATE_B_IDLE;
+ }
+ spin_unlock_irq(&twl->lock);
+
+ return linkstat;
+}
+
+static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
+{
+ twl->usb_mode = mode;
+
+ switch (mode) {
+ case T2_USB_MODE_ULPI:
+ twl4030_usb_clear_bits(twl, IFC_CTRL, IFC_CTRL_CARKITMODE);
+ twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+ twl4030_usb_clear_bits(twl, FUNC_CTRL,
+ FUNC_CTRL_XCVRSELECT_MASK |
+ FUNC_CTRL_OPMODE_MASK);
+ break;
+ case -1:
+ /* FIXME: power on defaults */
+ break;
+ default:
+ dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
+ mode);
+ break;
+ };
+}
+
+static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
+{
+ unsigned long timeout;
+ int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+
+ if (val >= 0) {
+ if (on) {
+ /* enable DPLL to access PHY registers over I2C */
+ val |= REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+
+ timeout = jiffies + HZ;
+ while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK)
+ && time_before(jiffies, timeout))
+ udelay(10);
+ if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK))
+ dev_err(twl->dev, "Timeout setting T2 HSUSB "
+ "PHY DPLL clock\n");
+ } else {
+ /* let ULPI control the DPLL clock */
+ val &= ~REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+ }
+ }
+}
+
+static void twl4030_phy_power(struct twl4030_usb *twl, int on)
+{
+ u8 pwr;
+
+ pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
+ if (on) {
+ pwr &= ~PHY_PWR_PHYPWD;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+ twl4030_usb_write(twl, PHY_CLK_CTRL,
+ twl4030_usb_read(twl, PHY_CLK_CTRL) |
+ (PHY_CLK_CTRL_CLOCKGATING_EN |
+ PHY_CLK_CTRL_CLK32K_EN));
+ } else {
+ pwr |= PHY_PWR_PHYPWD;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+ }
+}
+
+static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off)
+{
+ if (twl->asleep)
+ return;
+
+ twl4030_phy_power(twl, 0);
+ twl->asleep = 1;
+}
+
+static void twl4030_phy_resume(struct twl4030_usb *twl)
+{
+ if (!twl->asleep)
+ return;
+
+ twl4030_phy_power(twl, 1);
+ twl4030_i2c_access(twl, 1);
+ twl4030_usb_set_mode(twl, twl->usb_mode);
+ if (twl->usb_mode == T2_USB_MODE_ULPI)
+ twl4030_i2c_access(twl, 0);
+ twl->asleep = 0;
+}
+
+static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
+{
+ /* Enable writing to power configuration registers */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
+
+ /* put VUSB3V1 LDO in active state */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
+
+ /* input to VUSB3V1 LDO is from VBAT, not VBUS */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
+
+ /* turn on 3.1V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB3V1_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
+
+ /* turn on 1.5V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V5_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
+
+ /* turn on 1.8V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V8_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
+
+ /* disable access to power configuration registers */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
+}
+
+static ssize_t twl4030_usb_vbus_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct twl4030_usb *twl = dev_get_drvdata(dev);
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&twl->lock, flags);
+ ret = sprintf(buf, "%s\n",
+ (twl->linkstat == USB_LINK_VBUS) ? "on" : "off");
+ spin_unlock_irqrestore(&twl->lock, flags);
+
+ return ret;
+}
+static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
+
+static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
+{
+ struct twl4030_usb *twl = _twl;
+ int status;
+
+#ifdef CONFIG_LOCKDEP
+ /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
+ * we don't want and can't tolerate. Although it might be
+ * friendlier not to borrow this thread context...
+ */
+ local_irq_enable();
+#endif
+
+ status = twl4030_usb_linkstat(twl);
+ if (status != USB_LINK_UNKNOWN) {
+
+ /* FIXME add a set_power() method so that B-devices can
+ * configure the charger appropriately. It's not always
+ * correct to consume VBUS power, and how much current to
+ * consume is a function of the USB configuration chosen
+ * by the host.
+ *
+ * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
+ * its disconnect() sibling, when changing to/from the
+ * USB_LINK_VBUS state. musb_hdrc won't care until it
+ * starts to handle softconnect right.
+ */
+ twl4030charger_usb_en(status == USB_LINK_VBUS);
+
+ if (status == USB_LINK_NONE)
+ twl4030_phy_suspend(twl, 0);
+ else
+ twl4030_phy_resume(twl);
+ }
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+
+ return IRQ_HANDLED;
+}
+
+static int twl4030_set_suspend(struct otg_transceiver *x, int suspend)
+{
+ struct twl4030_usb *twl = xceiv_to_twl(x);
+
+ if (suspend)
+ twl4030_phy_suspend(twl, 1);
+ else
+ twl4030_phy_resume(twl);
+
+ return 0;
+}
+
+static int twl4030_set_peripheral(struct otg_transceiver *x,
+ struct usb_gadget *gadget)
+{
+ struct twl4030_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 twl4030_set_host(struct otg_transceiver *x, struct usb_bus *host)
+{
+ struct twl4030_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 __init twl4030_usb_probe(struct platform_device *pdev)
+{
+ struct twl4030_usb_data *pdata = pdev->dev.platform_data;
+ struct twl4030_usb *twl;
+ int status;
+
+ if (!pdata) {
+ dev_dbg(&pdev->dev, "platform_data not available\n");
+ return -EINVAL;
+ }
+
+ twl = kzalloc(sizeof *twl, GFP_KERNEL);
+ if (!twl)
+ return -ENOMEM;
+
+ twl->dev = &pdev->dev;
+ twl->irq = platform_get_irq(pdev, 0);
+ twl->otg.dev = twl->dev;
+ twl->otg.label = "twl4030";
+ twl->otg.set_host = twl4030_set_host;
+ twl->otg.set_peripheral = twl4030_set_peripheral;
+ twl->otg.set_suspend = twl4030_set_suspend;
+ twl->usb_mode = pdata->usb_mode;
+ twl->asleep = 1;
+
+ /* init spinlock for workqueue */
+ spin_lock_init(&twl->lock);
+
+ twl4030_usb_ldo_init(twl);
+ 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");
+
+ /* Our job is to use irqs and status from the power module
+ * to keep the transceiver disabled when nothing's connected.
+ *
+ * FIXME we actually shouldn't start enabling it until the
+ * USB controller drivers have said they're ready, by calling
+ * set_host() and/or set_peripheral() ... OTG_capable boards
+ * need both handles, otherwise just one suffices.
+ */
+ twl->irq_enabled = true;
+ status = request_irq(twl->irq, twl4030_usb_irq,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "twl4030_usb", twl);
+ if (status < 0) {
+ dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
+ twl->irq, status);
+ kfree(twl);
+ return status;
+ }
+
+ /* The IRQ handler just handles changes from the previous states
+ * of the ID and VBUS pins ... in probe() we must initialize that
+ * previous state. The easy way: fake an IRQ.
+ *
+ * REVISIT: a real IRQ might have happened already, if PREEMPT is
+ * enabled. Else the IRQ may not yet be configured or enabled,
+ * because of scheduling delays.
+ */
+ twl4030_usb_irq(twl->irq, twl);
+
+ dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
+ return 0;
+}
+
+static int __exit twl4030_usb_remove(struct platform_device *pdev)
+{
+ struct twl4030_usb *twl = platform_get_drvdata(pdev);
+ int val;
+
+ free_irq(twl->irq, twl);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+
+ /* set transceiver mode to power on defaults */
+ twl4030_usb_set_mode(twl, -1);
+
+ /* autogate 60MHz ULPI clock,
+ * clear dpll clock request for i2c access,
+ * disable 32KHz
+ */
+ val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+ if (val >= 0) {
+ val |= PHY_CLK_CTRL_CLOCKGATING_EN;
+ val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
+ twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
+ }
+
+ /* disable complete OTG block */
+ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+
+ twl4030_phy_power(twl, 0);
+
+ kfree(twl);
+
+ return 0;
+}
+
+static struct platform_driver twl4030_usb_driver = {
+ .probe = twl4030_usb_probe,
+ .remove = __exit_p(twl4030_usb_remove),
+ .driver = {
+ .name = "twl4030_usb",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init twl4030_usb_init(void)
+{
+ return platform_driver_register(&twl4030_usb_driver);
+}
+subsys_initcall(twl4030_usb_init);
+
+static void __exit twl4030_usb_exit(void)
+{
+ platform_driver_unregister(&twl4030_usb_driver);
+}
+module_exit(twl4030_usb_exit);
+
+MODULE_ALIAS("platform:twl4030_usb");
+MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
+MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 13:24:17 +0000