usbs_sa11x0.cdl

Sa11的USB驱动

# ====================================================================
#
#      usbs_sa11x0.cdl
#
#      SA11X0 USB support.
#
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# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      bartv
# Original data:  bartv
# Contributors:
# Date:           2000-10-04
#
#####DESCRIPTIONEND####
# ====================================================================

cdl_package CYGPKG_DEVS_USB_SA11X0 {
    display     "SA11X0 USB Device Driver"
    include_dir "cyg/io/usb"
    parent      CYGPKG_USB
    implements  CYGHWR_IO_USB_SLAVE
    doc         ref/devs-usb-sa11x0.html

    # Make sure that we are running on the right hardware.
    requires CYGPKG_HAL_ARM
    requires CYGPKG_HAL_ARM_SA11X0

    
    description "
        The on-chip serial port 0 on the SA11X0 implements a USB
        device controller, facilitating the use of this processor
        in USB peripherals. This package provides a suitable eCos
        device driver."


    cdl_option CYGFUN_DEVS_USB_SA11X0_EP0 {
	display       "Support the control endpoint 0"
	default_value CYGINT_IO_USB_SLAVE_CLIENTS
	# And the USB support packages
	requires      CYGPKG_IO_USB CYGPKG_IO_USB_SLAVE
	compile       usbs_sa11x0.c
	compile       -library=libextras.a usbs_sa11x0_data.cxx
	description "
	    Enable support for endpoint 0. If this support is disabled
	    then the entire USB port is unusable."
    }
    
    cdl_option CYGVAR_DEVS_USB_SA11X0_EP0_DEVTAB_ENTRY {
	display       "Provide a devtab entry for endpoint 0"
	default_value CYGGLO_IO_USB_SLAVE_PROVIDE_DEVTAB_ENTRIES
	requires      CYGPKG_IO
	description "
	    If endpoint 0 will only be accessed via the low-level
	    USB-specific calls then there is no need for an entry
 	    in the device table, saving some memory. If the
	    application intends to access the endpoint by means
	    of open and ioctl calls then a devtab entry is needed.
	"
    }
    
    cdl_component CYGPKG_DEVS_USB_SA11X0_EP1 {
	display       "Support endpoint 1, used for host->slave communications"
	implements    CYGHWR_IO_USB_SLAVE_OUT_ENDPOINTS
	requires      CYGFUN_DEVS_USB_SA11X0_EP0
	default_value CYGFUN_DEVS_USB_SA11X0_EP0
	description "
            In the SA11X0 USB implementation endpoint 1 can only be
            used for host->slave communication. If the intended application
	    only involves slave->host transfers then the support for
	    endpoint 1 can be disabled. Note that this does not affect
	    control messages which always go via endpoint 0."

	cdl_option CYGNUM_DEVS_USB_SA11X0_EP1_DMA_CHANNEL {
	    display       "Control DMA usage for endpoint 1"
	    flavor        booldata
	    legal_values  0 to 5
	    default_value 4
	    description "
	        In the SA11X0 USB implementation endpoint 1 only has
	        a 20-byte fifo. If the application only involves
	        small transfers then this may prove sufficient, but
	        for larger transfers the use of a DMA engine is
	        mandated. This configuration option allows the
	        use of DMA engine to be disabled or enabled, and the
	        specific DMA channel to be selected. The SA11X0
	        supports 6 DMA channels numbered 0 to 5. If DMA
	        is enabled for endpoint 1 then the selected channel
	        cannot be used by any other code."
	}

	cdl_option CYGVAR_DEVS_USB_SA11X0_EP1_DEVTAB_ENTRY {
	    display       "Provide a devtab entry for endpoint 1"
	    default_value CYGGLO_IO_USB_SLAVE_PROVIDE_DEVTAB_ENTRIES
            requires      CYGPKG_IO 
	    description "
	        If endpoint 1 will only be accessed via the low-level
	        USB-specific calls then there is no need for an entry
 	        in the device table, saving some memory. If the
	        application intends to access the endpoint by means
	        of open and read calls then a devtab entry is needed.
	    "
	}
    }

    cdl_component CYGPKG_DEVS_USB_SA11X0_EP2 {
	display       "Support endpoint 2, used for slave->host communications"
	implements CYGHWR_IO_USB_SLAVE_IN_ENDPOINTS
	requires      CYGFUN_DEVS_USB_SA11X0_EP0
	default_value CYGFUN_DEVS_USB_SA11X0_EP0
	description "
            In the SA11X0 USB implementation endpoint 2 can only be
            used for slave->host communication. If the intended application
	    only involves host->slave transfers then the support for
	    endpoint 2 can be disabled. Note that this does not affect
	    control messages which always go via endpoint 0."

	cdl_option CYGNUM_DEVS_USB_SA11X0_EP2_DMA_CHANNEL {
	    display       "Control DMA usage for endpoint 2"
	    flavor        booldata
	    legal_values  0 to 5
	    default_value 5
	    description "
	        In the SA11X0 USB implementation endpoint 2 only has
	        a 16-byte fifo. If the application only involves
	        small transfers then this may prove sufficient, but
	        for larger transfers the use of a DMA engine is
	        mandated. This configuration option allows the
	        use of DMA engine to be disabled or enabled, and the
	        specific DMA channel to be selected. The SA11X0
	        supports 6 DMA channels numbered 0 to 5. If DMA
	        is enabled for endpoint 2 then the selected channel
	        cannot be used by any other code."
	}
	
	cdl_option CYGVAR_DEVS_USB_SA11X0_EP2_DEVTAB_ENTRY {
	    display       "Provide a devtab entry for endpoint 2"
	    default_value CYGGLO_IO_USB_SLAVE_PROVIDE_DEVTAB_ENTRIES
            requires      CYGPKG_IO
	    description "
	        If endpoint 2 will only be accessed via the low-level
	        USB-specific calls then there is no need for an entry
 	        in the device table, saving some memory. If the
	        application intends to access the endpoint by means
	        of open and write calls then a devtab entry is needed.
	    "
	}
    }

    cdl_option CYGDAT_DEVS_USB_SA11X0_DEVTAB_BASENAME {
	display       "Base name for devtab entries"
	flavor        data
	active_if     { CYGVAR_DEVS_USB_SA11X0_EP0_DEVTAB_ENTRY ||
	                CYGVAR_DEVS_USB_SA11X0_EP1_DEVTAB_ENTRY ||
	                CYGVAR_DEVS_USB_SA11X0_EP2_DEVTAB_ENTRY
        }
	default_value { "\"/dev/usbs\"" }
	description "
            If the SA11X0 USB device driver package provides devtab
	    entries for any of the endpoints then this option gives
            control over the names of these entries. By default the
	    endpoints will be called \"/dev/usbs0c\", \"/dev/usbs1r\"
	    and \"/dev/usbs2w\" (assuming all three endpoints are
	    enabled. The common part \"/dev/usbs\" is determined
	    by this configuration option. It may be necessary to
	    change this if there are multiple USB slave-side
	    devices on the target hardware to prevent a name clash.
	"
    }
}