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Document the process of writing an musb glue layer by taking the Ingenic JZ4740 glue layer as an example, as it seems more simple than most glue layers due to the basic feature set of the JZ4740 USB device controller. Signed-off-by: Apelete Seketeli <apelete@seketeli.net> Signed-off-by: Felipe Balbi <balbi@ti.com>
233 lines
7.1 KiB
Makefile
233 lines
7.1 KiB
Makefile
###
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# This makefile is used to generate the kernel documentation,
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# primarily based on in-line comments in various source files.
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# See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
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# to document the SRC - and how to read it.
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# To add a new book the only step required is to add the book to the
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# list of DOCBOOKS.
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DOCBOOKS := z8530book.xml device-drivers.xml \
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kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
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writing_usb_driver.xml networking.xml \
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kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
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gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
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genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
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80211.xml debugobjects.xml sh.xml regulator.xml \
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alsa-driver-api.xml writing-an-alsa-driver.xml \
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tracepoint.xml drm.xml media_api.xml w1.xml \
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writing_musb_glue_layer.xml
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include Documentation/DocBook/media/Makefile
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###
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# The build process is as follows (targets):
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# (xmldocs) [by docproc]
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# file.tmpl --> file.xml +--> file.ps (psdocs) [by db2ps or xmlto]
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# +--> file.pdf (pdfdocs) [by db2pdf or xmlto]
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# +--> DIR=file (htmldocs) [by xmlto]
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# +--> man/ (mandocs) [by xmlto]
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# for PDF and PS output you can choose between xmlto and docbook-utils tools
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PDF_METHOD = $(prefer-db2x)
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PS_METHOD = $(prefer-db2x)
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###
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# The targets that may be used.
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PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
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targets += $(DOCBOOKS)
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BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
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xmldocs: $(BOOKS)
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sgmldocs: xmldocs
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PS := $(patsubst %.xml, %.ps, $(BOOKS))
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psdocs: $(PS)
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PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
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pdfdocs: $(PDF)
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HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
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htmldocs: $(HTML)
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$(call build_main_index)
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$(call build_images)
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$(call install_media_images)
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MAN := $(patsubst %.xml, %.9, $(BOOKS))
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mandocs: $(MAN)
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$(if $(wildcard $(obj)/man/*.9),gzip -f $(obj)/man/*.9)
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installmandocs: mandocs
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mkdir -p /usr/local/man/man9/
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install $(obj)/man/*.9.gz /usr/local/man/man9/
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###
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#External programs used
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KERNELDOC = $(srctree)/scripts/kernel-doc
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DOCPROC = $(objtree)/scripts/docproc
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XMLTOFLAGS = -m $(srctree)/$(src)/stylesheet.xsl
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XMLTOFLAGS += --skip-validation
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###
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# DOCPROC is used for two purposes:
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# 1) To generate a dependency list for a .tmpl file
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# 2) To preprocess a .tmpl file and call kernel-doc with
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# appropriate parameters.
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# The following rules are used to generate the .xml documentation
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# required to generate the final targets. (ps, pdf, html).
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quiet_cmd_docproc = DOCPROC $@
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cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
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define rule_docproc
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set -e; \
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$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
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$(cmd_$(1)); \
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( \
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echo 'cmd_$@ := $(cmd_$(1))'; \
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echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; \
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) > $(dir $@).$(notdir $@).cmd
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endef
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%.xml: %.tmpl $(KERNELDOC) $(DOCPROC) FORCE
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$(call if_changed_rule,docproc)
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# Tell kbuild to always build the programs
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always := $(hostprogs-y)
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notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
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exit 1
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db2xtemplate = db2TYPE -o $(dir $@) $<
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xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
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# determine which methods are available
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ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
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use-db2x = db2x
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prefer-db2x = db2x
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else
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use-db2x = notfound
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prefer-db2x = $(use-xmlto)
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endif
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ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
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use-xmlto = xmlto
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prefer-xmlto = xmlto
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else
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use-xmlto = notfound
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prefer-xmlto = $(use-db2x)
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endif
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# the commands, generated from the chosen template
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quiet_cmd_db2ps = PS $@
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cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
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%.ps : %.xml
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$(call cmd,db2ps)
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quiet_cmd_db2pdf = PDF $@
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cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
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%.pdf : %.xml
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$(call cmd,db2pdf)
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index = index.html
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main_idx = $(obj)/$(index)
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build_main_index = rm -rf $(main_idx); \
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echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
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echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
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cat $(HTML) >> $(main_idx)
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quiet_cmd_db2html = HTML $@
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cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
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echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
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$(patsubst %.html,%,$(notdir $@))</a><p>' > $@
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%.html: %.xml
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@(which xmlto > /dev/null 2>&1) || \
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(echo "*** You need to install xmlto ***"; \
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exit 1)
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@rm -rf $@ $(patsubst %.html,%,$@)
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$(call cmd,db2html)
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@if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
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cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
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quiet_cmd_db2man = MAN $@
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cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; fi
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%.9 : %.xml
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@(which xmlto > /dev/null 2>&1) || \
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(echo "*** You need to install xmlto ***"; \
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exit 1)
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$(Q)mkdir -p $(obj)/man
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$(call cmd,db2man)
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@touch $@
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###
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# Rules to generate postscripts and PNG images from .fig format files
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quiet_cmd_fig2eps = FIG2EPS $@
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cmd_fig2eps = fig2dev -Leps $< $@
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%.eps: %.fig
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@(which fig2dev > /dev/null 2>&1) || \
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(echo "*** You need to install transfig ***"; \
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exit 1)
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$(call cmd,fig2eps)
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quiet_cmd_fig2png = FIG2PNG $@
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cmd_fig2png = fig2dev -Lpng $< $@
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%.png: %.fig
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@(which fig2dev > /dev/null 2>&1) || \
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(echo "*** You need to install transfig ***"; \
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exit 1)
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$(call cmd,fig2png)
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###
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# Rule to convert a .c file to inline XML documentation
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gen_xml = :
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quiet_gen_xml = echo ' GEN $@'
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silent_gen_xml = :
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%.xml: %.c
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@$($(quiet)gen_xml)
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@( \
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echo "<programlisting>"; \
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expand --tabs=8 < $< | \
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sed -e "s/&/\\&/g" \
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-e "s/</\\</g" \
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-e "s/>/\\>/g"; \
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echo "</programlisting>") > $@
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###
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# Help targets as used by the top-level makefile
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dochelp:
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@echo ' Linux kernel internal documentation in different formats:'
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@echo ' htmldocs - HTML'
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@echo ' pdfdocs - PDF'
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@echo ' psdocs - Postscript'
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@echo ' xmldocs - XML DocBook'
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@echo ' mandocs - man pages'
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@echo ' installmandocs - install man pages generated by mandocs'
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@echo ' cleandocs - clean all generated DocBook files'
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###
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# Temporary files left by various tools
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clean-files := $(DOCBOOKS) \
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$(patsubst %.xml, %.dvi, $(DOCBOOKS)) \
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$(patsubst %.xml, %.aux, $(DOCBOOKS)) \
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$(patsubst %.xml, %.tex, $(DOCBOOKS)) \
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$(patsubst %.xml, %.log, $(DOCBOOKS)) \
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$(patsubst %.xml, %.out, $(DOCBOOKS)) \
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$(patsubst %.xml, %.ps, $(DOCBOOKS)) \
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$(patsubst %.xml, %.pdf, $(DOCBOOKS)) \
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$(patsubst %.xml, %.html, $(DOCBOOKS)) \
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$(patsubst %.xml, %.9, $(DOCBOOKS)) \
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$(index)
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clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
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cleandocs: cleanmediadocs
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$(Q)rm -f $(call objectify, $(clean-files))
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$(Q)rm -rf $(call objectify, $(clean-dirs))
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# Declare the contents of the .PHONY variable as phony. We keep that
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# information in a variable se we can use it in if_changed and friends.
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.PHONY: $(PHONY)
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