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Commit 5be19a9d authored by Xiaochen Shen's avatar Xiaochen Shen Committed by Greg Kroah-Hartman
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USB: Add Intel Langwell USB Device Controller driver 



Intel Langwell USB Device Controller is a High-Speed USB OTG device
controller in Intel Moorestown platform. It can work in OTG device mode
with Intel Langwell USB OTG transceiver driver as well as device-only
mode. The number of programmable endpoints is different through
controller revision.

NOTE:
This patch is the first version Intel Langwell USB OTG device controller
driver. The bug fixing is on going for some hardware and software
issues.  Intel Langwell USB OTG transceiver driver and EHCI driver
patches will be submitted later.

Supported features:
 - USB OTG protocol support with Intel Langwell USB OTG transceiver
   driver (turn on CONFIG_USB_LANGWELL_OTG)
 - Support control, bulk, interrupt and isochronous endpoints
   (isochronous not tested)
 - PCI D0/D3 power management support
 - Link Power Management (LPM) support

Tested gadget drivers:
 - g_file_storage
 - g_ether
 - g_zero

The passed tests:
 - g_file_storage: USBCV Chapter 9 tests
 - g_file_storage: USBCV MSC tests
 - g_file_storage: from/to host files copying
 - g_ether: ping, ftp and scp files from/to host
 - Hotplug, with and without hubs

Known issues:
 - g_ether: failed part of USBCV chap9 tests
 - LPM support not fully tested

TODO:
 - g_ether: pass all USBCV chap9 tests
 - g_zero: pass usbtest tests
 - Stress tests on different gadget drivers
 - On-chip private SRAM caching support

Signed-off-by: default avatarXiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f9c99bb8

drivers/usb/gadget/Kconfig

+21 −0
Original line number Original line Diff line number Diff line
@@ -474,6 +474,27 @@ config USB_GOKU 
	default USB_GADGET

	default USB_GADGET

	select USB_GADGET_SELECTED

	select USB_GADGET_SELECTED





config USB_GADGET_LANGWELL

	boolean "Intel Langwell USB Device Controller"

	depends on PCI

	select USB_GADGET_DUALSPEED

	help

	   Intel Langwell USB Device Controller is a High-Speed USB

	   On-The-Go device controller.



	   The number of programmable endpoints is different through

	   controller revision.



	   Say "y" to link the driver statically, or "m" to build a

	   dynamically linked module called "langwell_udc" and force all

	   gadget drivers to also be dynamically linked.



config USB_LANGWELL

	tristate

	depends on USB_GADGET_LANGWELL

	default USB_GADGET

	select USB_GADGET_SELECTED







#

#

# LAST -- dummy/emulated controller

# LAST -- dummy/emulated controller

drivers/usb/gadget/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -26,6 +26,7 @@ obj-$(CONFIG_USB_M66592) += m66592-udc.o 
obj-$(CONFIG_USB_FSL_QE)	+= fsl_qe_udc.o

obj-$(CONFIG_USB_FSL_QE)	+= fsl_qe_udc.o

obj-$(CONFIG_USB_CI13XXX)	+= ci13xxx_udc.o

obj-$(CONFIG_USB_CI13XXX)	+= ci13xxx_udc.o

obj-$(CONFIG_USB_S3C_HSOTG)	+= s3c-hsotg.o

obj-$(CONFIG_USB_S3C_HSOTG)	+= s3c-hsotg.o

obj-$(CONFIG_USB_LANGWELL)	+= langwell_udc.o





#

#

# USB gadget drivers

# USB gadget drivers

drivers/usb/gadget/gadget_chips.h

+8 −0
Original line number Original line Diff line number Diff line
@@ -137,6 +137,12 @@ 
#define gadget_is_musbhdrc(g)	0

#define gadget_is_musbhdrc(g)	0

#endif

#endif





#ifdef CONFIG_USB_GADGET_LANGWELL

#define gadget_is_langwell(g)	(!strcmp("langwell_udc", (g)->name))

#else

#define gadget_is_langwell(g)	0

#endif



/* from Montavista kernel (?) */

/* from Montavista kernel (?) */

#ifdef CONFIG_USB_GADGET_MPC8272

#ifdef CONFIG_USB_GADGET_MPC8272

#define gadget_is_mpc8272(g)	!strcmp("mpc8272_udc", (g)->name)

#define gadget_is_mpc8272(g)	!strcmp("mpc8272_udc", (g)->name)
@@ -231,6 +237,8 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget) 
		return 0x22;

		return 0x22;

	else if (gadget_is_ci13xxx(gadget))

	else if (gadget_is_ci13xxx(gadget))

		return 0x23;

		return 0x23;

	else if (gadget_is_langwell(gadget))

		return 0x24;

	return -ENOENT;

	return -ENOENT;

}

}