diff options
Diffstat (limited to 'drivers/usb/otg')
| -rw-r--r-- | drivers/usb/otg/Kconfig | 54 | ||||
| -rw-r--r-- | drivers/usb/otg/Makefile | 15 | ||||
| -rw-r--r-- | drivers/usb/otg/gpio_vbus.c | 335 | ||||
| -rw-r--r-- | drivers/usb/otg/isp1301_omap.c | 1683 | ||||
| -rw-r--r-- | drivers/usb/otg/otg.c | 65 | ||||
| -rw-r--r-- | drivers/usb/otg/twl4030-usb.c | 721 |
6 files changed, 0 insertions, 2873 deletions
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig deleted file mode 100644 index ee55b449ffd..00000000000 --- a/drivers/usb/otg/Kconfig +++ /dev/null @@ -1,54 +0,0 @@ -# -# 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" - -config USB_OTG_UTILS - bool - help - Select this to make sure the build includes objects from - the OTG infrastructure directory. - -if USB || USB_GADGET - -# -# 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 deleted file mode 100644 index d73c7cf5e2f..00000000000 --- a/drivers/usb/otg/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -# -# 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 deleted file mode 100644 index 63a6036f04b..00000000000 --- a/drivers/usb/otg/gpio_vbus.c +++ /dev/null @@ -1,335 +0,0 @@ -/* - * 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 deleted file mode 100644 index e0d56ef2bcb..00000000000 --- a/drivers/usb/otg/isp1301_omap.c +++ /dev/null @@ -1,1683 +0,0 @@ -/* - * 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 deleted file mode 100644 index ff318fae7d4..00000000000 --- a/drivers/usb/otg/otg.c +++ /dev/null @@ -1,65 +0,0 @@ -/* - * 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 deleted file mode 100644 index 416e4410be0..00000000000 --- a/drivers/usb/otg/twl4030-usb.c +++ /dev/null @@ -1,721 +0,0 @@ -/* - * 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"); |