USB: Add MUSB and TUSB support

This patch adds support for MUSB and TUSB controllers
integrated into omap2430 and davinci. It also adds support
for external tusb6010 controller.

Cc: David Brownell <[email protected]>
Cc: Tony Lindgren <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

MAINTAINERS

@@ -2928,6 +2928,12 @@ M:	[email protected]
 L:	[email protected]
 S:	Maintained
 
+MUSB MULTIPOINT HIGH SPEED DUAL-ROLE CONTROLLER
+P:     Felipe Balbi
+M:     [email protected]
+L:     [email protected]
+S:     Maintained
+
 MYRICOM MYRI-10G 10GbE DRIVER (MYRI10GE)
 P:	Andrew Gallatin
 M:	[email protected]

drivers/Makefile

@@ -57,6 +57,7 @@ obj-$(CONFIG_ATA_OVER_ETH)	+= block/aoe/
 obj-$(CONFIG_PARIDE) 		+= block/paride/
 obj-$(CONFIG_TC)		+= tc/
 obj-$(CONFIG_USB)		+= usb/
+obj-$(CONFIG_USB_MUSB_HDRC)	+= usb/musb/
 obj-$(CONFIG_PCI)		+= usb/
 obj-$(CONFIG_USB_GADGET)	+= usb/gadget/
 obj-$(CONFIG_SERIO)		+= input/serio/

drivers/usb/Kconfig

@@ -99,6 +99,8 @@ source "drivers/usb/mon/Kconfig"
 
 source "drivers/usb/host/Kconfig"
 
+source "drivers/usb/musb/Kconfig"
+
 source "drivers/usb/class/Kconfig"
 
 source "drivers/usb/storage/Kconfig"

drivers/usb/gadget/Kconfig

@@ -284,6 +284,16 @@ config USB_LH7A40X
 	default USB_GADGET
 	select USB_GADGET_SELECTED
 
+# built in ../musb along with host support
+config USB_GADGET_MUSB_HDRC
+	boolean "Inventra HDRC USB Peripheral (TI, ...)"
+	depends on USB_MUSB_HDRC && (USB_MUSB_PERIPHERAL || USB_MUSB_OTG)
+	select USB_GADGET_DUALSPEED
+	select USB_GADGET_SELECTED
+	help
+	  This OTG-capable silicon IP is used in dual designs including
+	  the TI DaVinci, OMAP 243x, OMAP 343x, and TUSB 6010.
+
 config USB_GADGET_OMAP
 	boolean "OMAP USB Device Controller"
 	depends on ARCH_OMAP

drivers/usb/musb/Kconfig

@@ -0,0 +1,176 @@
+#
+# USB Dual Role (OTG-ready) Controller Drivers
+# for silicon based on Mentor Graphics INVENTRA designs
+#
+
+comment "Enable Host or Gadget support to see Inventra options"
+	depends on !USB && USB_GADGET=n
+
+# (M)HDRC = (Multipoint) Highspeed Dual-Role Controller
+config USB_MUSB_HDRC
+	depends on (USB || USB_GADGET) && HAVE_CLK
+	select TWL4030_USB if MACH_OMAP_3430SDP
+	tristate 'Inventra Highspeed Dual Role Controller (TI, ...)'
+	help
+	  Say Y here if your system has a dual role high speed USB
+	  controller based on the Mentor Graphics silicon IP.  Then
+	  configure options to match your silicon and the board
+	  it's being used with, including the USB peripheral role,
+	  or the USB host role, or both.
+
+	  Texas Instruments parts using this IP include DaVinci 644x,
+	  OMAP 243x, OMAP 343x, and TUSB 6010.
+
+	  If you do not know what this is, please say N.
+
+	  To compile this driver as a module, choose M here; the
+	  module will be called "musb_hdrc".
+
+config USB_MUSB_SOC
+	boolean
+	depends on USB_MUSB_HDRC
+	default y if ARCH_DAVINCI
+	default y if ARCH_OMAP2430
+	default y if ARCH_OMAP34XX
+	help
+	  Use a static <asm/arch/hdrc_cnf.h> file to describe how the
+	  controller is configured (endpoints, mechanisms, etc) on the
+	  current iteration of a given system-on-chip.
+
+comment "DaVinci 644x USB support"
+	depends on USB_MUSB_HDRC && ARCH_DAVINCI
+
+comment "OMAP 243x high speed USB support"
+	depends on USB_MUSB_HDRC && ARCH_OMAP2430
+
+comment "OMAP 343x high speed USB support"
+	depends on USB_MUSB_HDRC && ARCH_OMAP34XX
+
+config USB_TUSB6010
+	boolean "TUSB 6010 support"
+	depends on USB_MUSB_HDRC && !USB_MUSB_SOC
+	default y
+	help
+	  The TUSB 6010 chip, from Texas Instruments, connects a discrete
+	  HDRC core using a 16-bit parallel bus (NOR flash style) or VLYNQ
+	  (a high speed serial link).  It can use system-specific external
+	  DMA controllers.
+
+choice
+	prompt "Driver Mode"
+	depends on USB_MUSB_HDRC
+	help
+	  Dual-Role devices can support both host and peripheral roles,
+	  as well as a the special "OTG Device" role which can switch
+	  between both roles as needed.
+
+# use USB_MUSB_HDRC_HCD not USB_MUSB_HOST to #ifdef host side support;
+# OTG needs both roles, not just USB_MUSB_HOST.
+config USB_MUSB_HOST
+	depends on USB
+	bool "USB Host"
+	help
+	  Say Y here if your system supports the USB host role.
+	  If it has a USB "A" (rectangular), "Mini-A" (uncommon),
+	  or "Mini-AB" connector, it supports the host role.
+	  (With a "Mini-AB" connector, you should enable USB OTG.)
+
+# use USB_GADGET_MUSB_HDRC not USB_MUSB_PERIPHERAL to #ifdef peripheral
+# side support ... OTG needs both roles
+config USB_MUSB_PERIPHERAL
+	depends on USB_GADGET
+	bool "USB Peripheral (gadget stack)"
+	select USB_GADGET_MUSB_HDRC
+	help
+	  Say Y here if your system supports the USB peripheral role.
+	  If it has a USB "B" (squarish), "Mini-B", or "Mini-AB"
+	  connector, it supports the peripheral role.
+	  (With a "Mini-AB" connector, you should enable USB OTG.)
+
+config USB_MUSB_OTG
+	depends on USB && USB_GADGET && PM && EXPERIMENTAL
+	bool "Both host and peripheral:  USB OTG (On The Go) Device"
+	select USB_GADGET_MUSB_HDRC
+	select USB_OTG
+	help
+	   The most notable feature of USB OTG is support for a
+	   "Dual-Role" device, which can act as either a device
+	   or a host.  The initial role choice can be changed
+	   later, when two dual-role devices talk to each other.
+
+	   At this writing, the OTG support in this driver is incomplete,
+	   omitting the mandatory HNP or SRP protocols.  However, some
+	   of the cable based role switching works.  (That is, grounding
+	   the ID pin switches the controller to host mode, while leaving
+	   it floating leaves it in peripheral mode.)
+
+	   Select this if your system has a Mini-AB connector, or
+	   to simplify certain kinds of configuration.
+
+	   To implement your OTG Targeted Peripherals List (TPL), enable
+	   USB_OTG_WHITELIST and update "drivers/usb/core/otg_whitelist.h"
+	   to match your requirements.
+
+endchoice
+
+# enable peripheral support (including with OTG)
+config USB_GADGET_MUSB_HDRC
+	bool
+	depends on USB_MUSB_HDRC && (USB_MUSB_PERIPHERAL || USB_MUSB_OTG)
+#	default y
+#	select USB_GADGET_DUALSPEED
+#	select USB_GADGET_SELECTED
+
+# enables host support (including with OTG)
+config USB_MUSB_HDRC_HCD
+	bool
+	depends on USB_MUSB_HDRC && (USB_MUSB_HOST || USB_MUSB_OTG)
+	select USB_OTG if USB_GADGET_MUSB_HDRC
+	default y
+
+
+config MUSB_PIO_ONLY
+	bool 'Disable DMA (always use PIO)'
+	depends on USB_MUSB_HDRC
+	default y if USB_TUSB6010
+	help
+	  All data is copied between memory and FIFO by the CPU.
+	  DMA controllers are ignored.
+
+	  Do not select 'n' here unless DMA support for your SOC or board
+	  is unavailable (or unstable).  When DMA is enabled at compile time,
+	  you can still disable it at run time using the "use_dma=n" module
+	  parameter.
+
+config USB_INVENTRA_DMA
+	bool
+	depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
+	default ARCH_OMAP2430 || ARCH_OMAP34XX
+	help
+	  Enable DMA transfers using Mentor's engine.
+
+config USB_TI_CPPI_DMA
+	bool
+	depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
+	default ARCH_DAVINCI
+	help
+	  Enable DMA transfers when TI CPPI DMA is available.
+
+config USB_TUSB_OMAP_DMA
+	bool
+	depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
+	depends on USB_TUSB6010
+	depends on ARCH_OMAP
+	default y
+	help
+	  Enable DMA transfers on TUSB 6010 when OMAP DMA is available.
+
+config	USB_MUSB_LOGLEVEL
+	depends on USB_MUSB_HDRC
+	int  'Logging Level (0 - none / 3 - annoying / ... )'
+	default 0
+	help
+	  Set the logging level. 0 disables the debugging altogether,
+	  although when USB_DEBUG is set the value is at least 1.
+	  Starting at level 3, per-transfer (urb, usb_request, packet,
+	  or dma transfer) tracing may kick in.

drivers/usb/musb/Makefile

@@ -0,0 +1,86 @@
+#
+# for USB OTG silicon based on Mentor Graphics INVENTRA designs
+#
+
+musb_hdrc-objs := musb_core.o
+
+obj-$(CONFIG_USB_MUSB_HDRC)	+= musb_hdrc.o
+
+ifeq ($(CONFIG_ARCH_DAVINCI),y)
+	musb_hdrc-objs	+= davinci.o
+endif
+
+ifeq ($(CONFIG_USB_TUSB6010),y)
+	musb_hdrc-objs	+= tusb6010.o
+endif
+
+ifeq ($(CONFIG_ARCH_OMAP2430),y)
+	musb_hdrc-objs	+= omap2430.o
+endif
+
+ifeq ($(CONFIG_ARCH_OMAP3430),y)
+	musb_hdrc-objs	+= omap2430.o
+endif
+
+ifeq ($(CONFIG_USB_GADGET_MUSB_HDRC),y)
+	musb_hdrc-objs		+= musb_gadget_ep0.o musb_gadget.o
+endif
+
+ifeq ($(CONFIG_USB_MUSB_HDRC_HCD),y)
+	musb_hdrc-objs		+= musb_virthub.o musb_host.o
+endif
+
+# the kconfig must guarantee that only one of the
+# possible I/O schemes will be enabled at a time ...
+# PIO only, or DMA (several potential schemes).
+# though PIO is always there to back up DMA, and for ep0
+
+ifneq ($(CONFIG_MUSB_PIO_ONLY),y)
+
+  ifeq ($(CONFIG_USB_INVENTRA_DMA),y)
+    musb_hdrc-objs		+= musbhsdma.o
+
+  else
+    ifeq ($(CONFIG_USB_TI_CPPI_DMA),y)
+      musb_hdrc-objs		+= cppi_dma.o
+
+    else
+      ifeq ($(CONFIG_USB_TUSB_OMAP_DMA),y)
+        musb_hdrc-objs		+= tusb6010_omap.o
+
+      endif
+    endif
+  endif
+endif
+
+
+################################################################################
+
+# FIXME remove all these extra "-DMUSB_* things, stick to CONFIG_*
+
+ifeq ($(CONFIG_USB_INVENTRA_MUSB_HAS_AHB_ID),y)
+	EXTRA_CFLAGS += -DMUSB_AHB_ID
+endif
+
+# Debugging
+
+MUSB_DEBUG:=$(CONFIG_USB_MUSB_LOGLEVEL)
+
+ifeq ("$(strip $(MUSB_DEBUG))","")
+    ifdef CONFIG_USB_DEBUG
+	MUSB_DEBUG:=1
+    else
+	MUSB_DEBUG:=0
+    endif
+endif
+
+ifneq ($(MUSB_DEBUG),0)
+    EXTRA_CFLAGS += -DDEBUG
+
+    ifeq ($(CONFIG_PROC_FS),y)
+	musb_hdrc-objs		+= musb_procfs.o
+    endif
+
+endif
+
+EXTRA_CFLAGS += -DMUSB_DEBUG=$(MUSB_DEBUG)