aa449e1efb
Synopsis 28nm PHY has two different circuits for detecting changes on ID line. ID_DIG is designed for detecting ID_float vs ID_gnd. ID_ACA is designed for detecting RID_A, RID_B, RID_C states. These are mutually exclusive and enabling both circuits has undefined behavior. Enable ID_ACA upon VBUS high or ID_gnd events to detect further ACA states. ACA ID_GND threshold range is overlapped with OTG ID_FLOAT threshold range. Hence PHY ID_DIG circuit can not be used for detecting ACA ID_GND. Use PMIC ID circuit for detecting both OTG and ACA ID_GND. Link controller can not generate PHY_ALT interrupt in host mode. But the corresponding PHY register reflects the actual ID state. Hence implement polling to read PHY register to detect ID_GND --> ID_A, ID_A --> ID_B transitions. That means low power mode can not be allowed in host mode. Also disallow suspending the device attached on the root hub. Otherwise PHY is put into suspend state automatically upon setting SUSP bit in PORTSC register. Link controller can not generate asynchronous interrupt for ID_ACA changes in low power mode. Hence disallow low power mode in ID_B and ID_C states. USB_MSM_ACA is not selected by default. If it selected, ACA states can be detected and low power mode is not allowed in host mode. Writing "enable" to <debugfs>/msm_otg/aca enables ACA irrespective of USB_MSM_ACA selection. This is meant for debugging only. Change-Id: I51e80d803a583c5bdffc8111696943c04958f604 Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
189 lines
6.2 KiB
Plaintext
189 lines
6.2 KiB
Plaintext
#
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# USB OTG infrastructure may be needed for peripheral-only, host-only,
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# or OTG-capable configurations when OTG transceivers or controllers
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# are used.
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#
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comment "OTG and related infrastructure"
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config USB_OTG_UTILS
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bool
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help
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Select this to make sure the build includes objects from
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the OTG infrastructure directory.
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config USB_OTG_WAKELOCK
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bool "Hold a wakelock when USB connected"
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depends on WAKELOCK
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select USB_OTG_UTILS
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help
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Select this to automatically hold a wakelock when USB is
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connected, preventing suspend.
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if USB || USB_GADGET
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#
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# USB Transceiver Drivers
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#
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config USB_GPIO_VBUS
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tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
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depends on GENERIC_GPIO
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select USB_OTG_UTILS
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help
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Provides simple GPIO VBUS sensing for controllers with an
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internal transceiver via the otg_transceiver interface, and
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optionally control of a D+ pullup GPIO as well as a VBUS
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current limit regulator.
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config ISP1301_OMAP
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tristate "Philips ISP1301 with OMAP OTG"
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depends on I2C && ARCH_OMAP_OTG
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select USB_OTG_UTILS
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help
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If you say yes here you get support for the Philips ISP1301
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USB-On-The-Go transceiver working with the OMAP OTG controller.
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The ISP1301 is a full speed USB transceiver which is used in
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products including H2, H3, and H4 development boards for Texas
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Instruments OMAP processors.
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This driver can also be built as a module. If so, the module
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will be called isp1301_omap.
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config USB_ULPI
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bool "Generic ULPI Transceiver Driver"
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depends on ARM
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select USB_OTG_UTILS
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help
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Enable this to support ULPI connected USB OTG transceivers which
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are likely found on embedded boards.
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config USB_ULPI_VIEWPORT
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bool
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depends on USB_ULPI
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help
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Provides read/write operations to the ULPI phy register set for
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controllers with a viewport register (e.g. Chipidea/ARC controllers).
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config TWL4030_USB
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tristate "TWL4030 USB Transceiver Driver"
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depends on TWL4030_CORE && REGULATOR_TWL4030
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select USB_OTG_UTILS
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help
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Enable this to support the USB OTG transceiver on TWL4030
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family chips (including the TWL5030 and TPS659x0 devices).
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This transceiver supports high and full speed devices plus,
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in host mode, low speed.
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config USB_MSM_OTG_72K
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bool "OTG support for Legcay Qualcomm on-chip USB controller"
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depends on ARCH_MSM
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select USB_OTG_UTILS
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default USB_MSM_72K
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help
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Enable this to support the USB OTG transceiver on MSM chips. It
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handles PHY initialization, clock management, low power mode and
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workarounds required after resetting the hardware. This driver is
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required for even peripheral only or host only mode configuration.
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Supports SRP and HNP when both gadget and Host are selected.
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config MSM_OTG_ENABLE_A_WAIT_BCON_TIMEOUT
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bool "Enable A-device timeout for B-device connection"
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depends on USB_MSM_OTG_72K
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default n
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help
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OTG specification allows A-device to turn off VBUS if B-device
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fails to signal connect event before TA_WAIT_BCON (1.1 - 30 sec).
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SRP detection is enabled and hardware is put into low power mode
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upon this timeout.
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If you say yes, VBUS will be turned off if B-device does not signal
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connect in 30 sec. Otherwise VBUS is not turned off when Micro-A
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cable is connected. But hardware is put into LPM. Say no if leakage
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currents in your system are minimum.
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config TWL6030_USB
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tristate "TWL6030 USB Transceiver Driver"
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depends on TWL4030_CORE
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select USB_OTG_UTILS
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help
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Enable this to support the USB OTG transceiver on TWL6030
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family chips. This TWL6030 transceiver has the VBUS and ID GND
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and OTG SRP events capabilities. For all other transceiver functionality
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UTMI PHY is embedded in OMAP4430. The internal PHY configurations APIs
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are hooked to this driver through platform_data structure.
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The definition of internal PHY APIs are in the mach-omap2 layer.
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config NOP_USB_XCEIV
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tristate "NOP USB Transceiver Driver"
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select USB_OTG_UTILS
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help
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this driver is to be used by all the usb transceiver which are either
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built-in with usb ip or which are autonomous and doesn't require any
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phy programming such as ISP1x04 etc.
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config USB_LANGWELL_OTG
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tristate "Intel Langwell USB OTG dual-role support"
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depends on USB && PCI && INTEL_SCU_IPC
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select USB_OTG
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select USB_OTG_UTILS
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help
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Say Y here if you want to build Intel Langwell USB OTG
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transciever driver in kernel. This driver implements role
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switch between EHCI host driver and Langwell USB OTG
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client driver.
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To compile this driver as a module, choose M here: the
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module will be called langwell_otg.
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config USB_MSM_OTG
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tristate "OTG support for Qualcomm on-chip USB controller"
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depends on (USB || USB_GADGET) && ARCH_MSM
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select USB_OTG_UTILS
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help
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Enable this to support the USB OTG transceiver on MSM chips. It
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handles PHY initialization, clock management, and workarounds
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required after resetting the hardware and power management.
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This driver is required even for peripheral only or host only
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mode configurations.
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This driver is not supported on boards like trout which
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has an external PHY.
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config USB_MSM_ACA
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bool "Support for Accessory Charger Adapter (ACA)"
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depends on (USB_MSM_OTG || USB_MSM_OTG_72K) && ARCH_MSM
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default n
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help
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Accesory Charger Adapter is a charger specified in USB Battery
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Charging Specification(1.1). It enables OTG devices to charge
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while operating as a host or peripheral at the same time.
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config USB_MSM_STANDARD_ACA
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bool "Support for Standard ACA"
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depends on USB_MSM_ACA
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default USB_MSM_OTG_72K
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help
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A Standard ACA has a Standard-A receptacle on the Accessory Port,
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and can only be attached to a B-device. RID_A and RID_GND states
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are only possible with Standard ACA. Select this feature if the
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board is intended to support only Standard ACA.
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config AB8500_USB
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tristate "AB8500 USB Transceiver Driver"
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depends on AB8500_CORE
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select USB_OTG_UTILS
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help
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Enable this to support the USB OTG transceiver in AB8500 chip.
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This transceiver supports high and full speed devices plus,
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in host mode, low speed.
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config FSL_USB2_OTG
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bool "Freescale USB OTG Transceiver Driver"
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depends on USB_EHCI_FSL && USB_GADGET_FSL_USB2
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select USB_OTG
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select USB_OTG_UTILS
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help
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Enable this to support Freescale USB OTG transceiver.
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endif # USB || OTG
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