From: Randy Dunlap Date: Sun, 22 Feb 2009 20:15:45 +0000 (-0800) Subject: docbook: split kernel-api for device-drivers X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=f7f84f38cd916552c175f1f3d09cb6e85c1b29fc;p=linux-2.6-omap-h63xx.git docbook: split kernel-api for device-drivers The kernel-api docbook was much larger than any of the others, so processing it took longer and needed some docbook extras in some cases, so split it into kernel-api (infrastructure etc.) and device drivers/device subsystems. This allows these docbooks to be generated in parallel. (This reduced the docbook processing time on my 4-proc system with make -j4 from about 5min:16sec to about 2min:01sec.) The chapters that were moved from kernel-api to device-drivers are: Driver Basics Device drivers infrastructure Parallel Port Devices Message-based devices Sound Devices 16x50 UART Driver Frame Buffer Library Input Subsystem Serial Peripheral Interface (SPI) I2C and SMBus Subsystem Signed-off-by: Randy Dunlap Acked-by: Sam Ravnborg Signed-off-by: Linus Torvalds --- diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile index dc3154e4927..1462ed86d40 100644 --- a/Documentation/DocBook/Makefile +++ b/Documentation/DocBook/Makefile @@ -6,7 +6,7 @@ # To add a new book the only step required is to add the book to the # list of DOCBOOKS. -DOCBOOKS := z8530book.xml mcabook.xml \ +DOCBOOKS := z8530book.xml mcabook.xml device-drivers.xml \ kernel-hacking.xml kernel-locking.xml deviceiobook.xml \ procfs-guide.xml writing_usb_driver.xml networking.xml \ kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \ diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl new file mode 100644 index 00000000000..94a20fe8fed --- /dev/null +++ b/Documentation/DocBook/device-drivers.tmpl @@ -0,0 +1,418 @@ + + + + + + Linux Device Drivers + + + + This documentation is free software; you can redistribute + it and/or modify it under the terms of the GNU General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later + version. + + + + This program is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied + warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + + + You should have received a copy of the GNU General Public + License along with this program; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, + MA 02111-1307 USA + + + + For more details see the file COPYING in the source + distribution of Linux. + + + + + + + + Driver Basics + Driver Entry and Exit points +!Iinclude/linux/init.h + + + Atomic and pointer manipulation +!Iarch/x86/include/asm/atomic_32.h +!Iarch/x86/include/asm/unaligned.h + + + Delaying, scheduling, and timer routines +!Iinclude/linux/sched.h +!Ekernel/sched.c +!Ekernel/timer.c + + High-resolution timers +!Iinclude/linux/ktime.h +!Iinclude/linux/hrtimer.h +!Ekernel/hrtimer.c + + Workqueues and Kevents +!Ekernel/workqueue.c + + Internal Functions +!Ikernel/exit.c +!Ikernel/signal.c +!Iinclude/linux/kthread.h +!Ekernel/kthread.c + + + Kernel objects manipulation + +!Elib/kobject.c + + + Kernel utility functions +!Iinclude/linux/kernel.h +!Ekernel/printk.c +!Ekernel/panic.c +!Ekernel/sys.c +!Ekernel/rcupdate.c + + + Device Resource Management +!Edrivers/base/devres.c + + + + + + Device drivers infrastructure + Device Drivers Base + +!Edrivers/base/driver.c +!Edrivers/base/core.c +!Edrivers/base/class.c +!Edrivers/base/firmware_class.c +!Edrivers/base/transport_class.c + +!Edrivers/base/sys.c + +!Edrivers/base/platform.c +!Edrivers/base/bus.c + + Device Drivers Power Management +!Edrivers/base/power/main.c + + Device Drivers ACPI Support + +!Edrivers/acpi/scan.c +!Idrivers/acpi/scan.c + + + Device drivers PnP support +!Idrivers/pnp/core.c + +!Edrivers/pnp/card.c +!Idrivers/pnp/driver.c +!Edrivers/pnp/manager.c +!Edrivers/pnp/support.c + + Userspace IO devices +!Edrivers/uio/uio.c +!Iinclude/linux/uio_driver.h + + + + + Parallel Port Devices +!Iinclude/linux/parport.h +!Edrivers/parport/ieee1284.c +!Edrivers/parport/share.c +!Idrivers/parport/daisy.c + + + + Message-based devices + Fusion message devices +!Edrivers/message/fusion/mptbase.c +!Idrivers/message/fusion/mptbase.c +!Edrivers/message/fusion/mptscsih.c +!Idrivers/message/fusion/mptscsih.c +!Idrivers/message/fusion/mptctl.c +!Idrivers/message/fusion/mptspi.c +!Idrivers/message/fusion/mptfc.c +!Idrivers/message/fusion/mptlan.c + + I2O message devices +!Iinclude/linux/i2o.h +!Idrivers/message/i2o/core.h +!Edrivers/message/i2o/iop.c +!Idrivers/message/i2o/iop.c +!Idrivers/message/i2o/config-osm.c +!Edrivers/message/i2o/exec-osm.c +!Idrivers/message/i2o/exec-osm.c +!Idrivers/message/i2o/bus-osm.c +!Edrivers/message/i2o/device.c +!Idrivers/message/i2o/device.c +!Idrivers/message/i2o/driver.c +!Idrivers/message/i2o/pci.c +!Idrivers/message/i2o/i2o_block.c +!Idrivers/message/i2o/i2o_scsi.c +!Idrivers/message/i2o/i2o_proc.c + + + + + Sound Devices +!Iinclude/sound/core.h +!Esound/sound_core.c +!Iinclude/sound/pcm.h +!Esound/core/pcm.c +!Esound/core/device.c +!Esound/core/info.c +!Esound/core/rawmidi.c +!Esound/core/sound.c +!Esound/core/memory.c +!Esound/core/pcm_memory.c +!Esound/core/init.c +!Esound/core/isadma.c +!Esound/core/control.c +!Esound/core/pcm_lib.c +!Esound/core/hwdep.c +!Esound/core/pcm_native.c +!Esound/core/memalloc.c + + + + + 16x50 UART Driver +!Iinclude/linux/serial_core.h +!Edrivers/serial/serial_core.c +!Edrivers/serial/8250.c + + + + Frame Buffer Library + + + The frame buffer drivers depend heavily on four data structures. + These structures are declared in include/linux/fb.h. They are + fb_info, fb_var_screeninfo, fb_fix_screeninfo and fb_monospecs. + The last three can be made available to and from userland. + + + + fb_info defines the current state of a particular video card. + Inside fb_info, there exists a fb_ops structure which is a + collection of needed functions to make fbdev and fbcon work. + fb_info is only visible to the kernel. + + + + fb_var_screeninfo is used to describe the features of a video card + that are user defined. With fb_var_screeninfo, things such as + depth and the resolution may be defined. + + + + The next structure is fb_fix_screeninfo. This defines the + properties of a card that are created when a mode is set and can't + be changed otherwise. A good example of this is the start of the + frame buffer memory. This "locks" the address of the frame buffer + memory, so that it cannot be changed or moved. + + + + The last structure is fb_monospecs. In the old API, there was + little importance for fb_monospecs. This allowed for forbidden things + such as setting a mode of 800x600 on a fix frequency monitor. With + the new API, fb_monospecs prevents such things, and if used + correctly, can prevent a monitor from being cooked. fb_monospecs + will not be useful until kernels 2.5.x. + + + Frame Buffer Memory +!Edrivers/video/fbmem.c + + + Frame Buffer Colormap +!Edrivers/video/fbcmap.c + + + Frame Buffer Video Mode Database +!Idrivers/video/modedb.c +!Edrivers/video/modedb.c + + Frame Buffer Macintosh Video Mode Database +!Edrivers/video/macmodes.c + + Frame Buffer Fonts + + Refer to the file drivers/video/console/fonts.c for more information. + + + + + + + Input Subsystem +!Iinclude/linux/input.h +!Edrivers/input/input.c +!Edrivers/input/ff-core.c +!Edrivers/input/ff-memless.c + + + + Serial Peripheral Interface (SPI) + + SPI is the "Serial Peripheral Interface", widely used with + embedded systems because it is a simple and efficient + interface: basically a multiplexed shift register. + Its three signal wires hold a clock (SCK, often in the range + of 1-20 MHz), a "Master Out, Slave In" (MOSI) data line, and + a "Master In, Slave Out" (MISO) data line. + SPI is a full duplex protocol; for each bit shifted out the + MOSI line (one per clock) another is shifted in on the MISO line. + Those bits are assembled into words of various sizes on the + way to and from system memory. + An additional chipselect line is usually active-low (nCS); + four signals are normally used for each peripheral, plus + sometimes an interrupt. + + + The SPI bus facilities listed here provide a generalized + interface to declare SPI busses and devices, manage them + according to the standard Linux driver model, and perform + input/output operations. + At this time, only "master" side interfaces are supported, + where Linux talks to SPI peripherals and does not implement + such a peripheral itself. + (Interfaces to support implementing SPI slaves would + necessarily look different.) + + + The programming interface is structured around two kinds of driver, + and two kinds of device. + A "Controller Driver" abstracts the controller hardware, which may + be as simple as a set of GPIO pins or as complex as a pair of FIFOs + connected to dual DMA engines on the other side of the SPI shift + register (maximizing throughput). Such drivers bridge between + whatever bus they sit on (often the platform bus) and SPI, and + expose the SPI side of their device as a + struct spi_master. + SPI devices are children of that master, represented as a + struct spi_device and manufactured from + struct spi_board_info descriptors which + are usually provided by board-specific initialization code. + A struct spi_driver is called a + "Protocol Driver", and is bound to a spi_device using normal + driver model calls. + + + The I/O model is a set of queued messages. Protocol drivers + submit one or more struct spi_message + objects, which are processed and completed asynchronously. + (There are synchronous wrappers, however.) Messages are + built from one or more struct spi_transfer + objects, each of which wraps a full duplex SPI transfer. + A variety of protocol tweaking options are needed, because + different chips adopt very different policies for how they + use the bits transferred with SPI. + +!Iinclude/linux/spi/spi.h +!Fdrivers/spi/spi.c spi_register_board_info +!Edrivers/spi/spi.c + + + + I<superscript>2</superscript>C and SMBus Subsystem + + + I2C (or without fancy typography, "I2C") + is an acronym for the "Inter-IC" bus, a simple bus protocol which is + widely used where low data rate communications suffice. + Since it's also a licensed trademark, some vendors use another + name (such as "Two-Wire Interface", TWI) for the same bus. + I2C only needs two signals (SCL for clock, SDA for data), conserving + board real estate and minimizing signal quality issues. + Most I2C devices use seven bit addresses, and bus speeds of up + to 400 kHz; there's a high speed extension (3.4 MHz) that's not yet + found wide use. + I2C is a multi-master bus; open drain signaling is used to + arbitrate between masters, as well as to handshake and to + synchronize clocks from slower clients. + + + + The Linux I2C programming interfaces support only the master + side of bus interactions, not the slave side. + The programming interface is structured around two kinds of driver, + and two kinds of device. + An I2C "Adapter Driver" abstracts the controller hardware; it binds + to a physical device (perhaps a PCI device or platform_device) and + exposes a struct i2c_adapter representing + each I2C bus segment it manages. + On each I2C bus segment will be I2C devices represented by a + struct i2c_client. Those devices will + be bound to a struct i2c_driver, + which should follow the standard Linux driver model. + (At this writing, a legacy model is more widely used.) + There are functions to perform various I2C protocol operations; at + this writing all such functions are usable only from task context. + + + + The System Management Bus (SMBus) is a sibling protocol. Most SMBus + systems are also I2C conformant. The electrical constraints are + tighter for SMBus, and it standardizes particular protocol messages + and idioms. Controllers that support I2C can also support most + SMBus operations, but SMBus controllers don't support all the protocol + options that an I2C controller will. + There are functions to perform various SMBus protocol operations, + either using I2C primitives or by issuing SMBus commands to + i2c_adapter devices which don't support those I2C operations. + + +!Iinclude/linux/i2c.h +!Fdrivers/i2c/i2c-boardinfo.c i2c_register_board_info +!Edrivers/i2c/i2c-core.c + + + diff --git a/Documentation/DocBook/kernel-api.tmpl b/Documentation/DocBook/kernel-api.tmpl index 5818ff75786..bc962cda650 100644 --- a/Documentation/DocBook/kernel-api.tmpl +++ b/Documentation/DocBook/kernel-api.tmpl @@ -38,58 +38,6 @@ - - Driver Basics - Driver Entry and Exit points -!Iinclude/linux/init.h - - - Atomic and pointer manipulation -!Iarch/x86/include/asm/atomic_32.h -!Iarch/x86/include/asm/unaligned.h - - - Delaying, scheduling, and timer routines -!Iinclude/linux/sched.h -!Ekernel/sched.c -!Ekernel/timer.c - - High-resolution timers -!Iinclude/linux/ktime.h -!Iinclude/linux/hrtimer.h -!Ekernel/hrtimer.c - - Workqueues and Kevents -!Ekernel/workqueue.c - - Internal Functions -!Ikernel/exit.c -!Ikernel/signal.c -!Iinclude/linux/kthread.h -!Ekernel/kthread.c - - - Kernel objects manipulation - -!Elib/kobject.c - - - Kernel utility functions -!Iinclude/linux/kernel.h -!Ekernel/printk.c -!Ekernel/panic.c -!Ekernel/sys.c -!Ekernel/rcupdate.c - - - Device Resource Management -!Edrivers/base/devres.c - - - - Data Types Doubly Linked Lists @@ -298,62 +246,6 @@ X!Earch/x86/kernel/mca_32.c !Ikernel/acct.c - - Device drivers infrastructure - Device Drivers Base - -!Edrivers/base/driver.c -!Edrivers/base/core.c -!Edrivers/base/class.c -!Edrivers/base/firmware_class.c -!Edrivers/base/transport_class.c - -!Edrivers/base/sys.c - -!Edrivers/base/platform.c -!Edrivers/base/bus.c - - Device Drivers Power Management -!Edrivers/base/power/main.c - - Device Drivers ACPI Support - -!Edrivers/acpi/scan.c -!Idrivers/acpi/scan.c - - - Device drivers PnP support -!Idrivers/pnp/core.c - -!Edrivers/pnp/card.c -!Idrivers/pnp/driver.c -!Edrivers/pnp/manager.c -!Edrivers/pnp/support.c - - Userspace IO devices -!Edrivers/uio/uio.c -!Iinclude/linux/uio_driver.h - - - Block Devices !Eblock/blk-core.c @@ -381,275 +273,6 @@ X!Edrivers/pnp/system.c !Edrivers/char/misc.c - - Parallel Port Devices -!Iinclude/linux/parport.h -!Edrivers/parport/ieee1284.c -!Edrivers/parport/share.c -!Idrivers/parport/daisy.c - - - - Message-based devices - Fusion message devices -!Edrivers/message/fusion/mptbase.c -!Idrivers/message/fusion/mptbase.c -!Edrivers/message/fusion/mptscsih.c -!Idrivers/message/fusion/mptscsih.c -!Idrivers/message/fusion/mptctl.c -!Idrivers/message/fusion/mptspi.c -!Idrivers/message/fusion/mptfc.c -!Idrivers/message/fusion/mptlan.c - - I2O message devices -!Iinclude/linux/i2o.h -!Idrivers/message/i2o/core.h -!Edrivers/message/i2o/iop.c -!Idrivers/message/i2o/iop.c -!Idrivers/message/i2o/config-osm.c -!Edrivers/message/i2o/exec-osm.c -!Idrivers/message/i2o/exec-osm.c -!Idrivers/message/i2o/bus-osm.c -!Edrivers/message/i2o/device.c -!Idrivers/message/i2o/device.c -!Idrivers/message/i2o/driver.c -!Idrivers/message/i2o/pci.c -!Idrivers/message/i2o/i2o_block.c -!Idrivers/message/i2o/i2o_scsi.c -!Idrivers/message/i2o/i2o_proc.c - - - - - Sound Devices -!Iinclude/sound/core.h -!Esound/sound_core.c -!Iinclude/sound/pcm.h -!Esound/core/pcm.c -!Esound/core/device.c -!Esound/core/info.c -!Esound/core/rawmidi.c -!Esound/core/sound.c -!Esound/core/memory.c -!Esound/core/pcm_memory.c -!Esound/core/init.c -!Esound/core/isadma.c -!Esound/core/control.c -!Esound/core/pcm_lib.c -!Esound/core/hwdep.c -!Esound/core/pcm_native.c -!Esound/core/memalloc.c - - - - - 16x50 UART Driver -!Iinclude/linux/serial_core.h -!Edrivers/serial/serial_core.c -!Edrivers/serial/8250.c - - - - Frame Buffer Library - - - The frame buffer drivers depend heavily on four data structures. - These structures are declared in include/linux/fb.h. They are - fb_info, fb_var_screeninfo, fb_fix_screeninfo and fb_monospecs. - The last three can be made available to and from userland. - - - - fb_info defines the current state of a particular video card. - Inside fb_info, there exists a fb_ops structure which is a - collection of needed functions to make fbdev and fbcon work. - fb_info is only visible to the kernel. - - - - fb_var_screeninfo is used to describe the features of a video card - that are user defined. With fb_var_screeninfo, things such as - depth and the resolution may be defined. - - - - The next structure is fb_fix_screeninfo. This defines the - properties of a card that are created when a mode is set and can't - be changed otherwise. A good example of this is the start of the - frame buffer memory. This "locks" the address of the frame buffer - memory, so that it cannot be changed or moved. - - - - The last structure is fb_monospecs. In the old API, there was - little importance for fb_monospecs. This allowed for forbidden things - such as setting a mode of 800x600 on a fix frequency monitor. With - the new API, fb_monospecs prevents such things, and if used - correctly, can prevent a monitor from being cooked. fb_monospecs - will not be useful until kernels 2.5.x. - - - Frame Buffer Memory -!Edrivers/video/fbmem.c - - - Frame Buffer Colormap -!Edrivers/video/fbcmap.c - - - Frame Buffer Video Mode Database -!Idrivers/video/modedb.c -!Edrivers/video/modedb.c - - Frame Buffer Macintosh Video Mode Database -!Edrivers/video/macmodes.c - - Frame Buffer Fonts - - Refer to the file drivers/video/console/fonts.c for more information. - - - - - - - Input Subsystem -!Iinclude/linux/input.h -!Edrivers/input/input.c -!Edrivers/input/ff-core.c -!Edrivers/input/ff-memless.c - - - - Serial Peripheral Interface (SPI) - - SPI is the "Serial Peripheral Interface", widely used with - embedded systems because it is a simple and efficient - interface: basically a multiplexed shift register. - Its three signal wires hold a clock (SCK, often in the range - of 1-20 MHz), a "Master Out, Slave In" (MOSI) data line, and - a "Master In, Slave Out" (MISO) data line. - SPI is a full duplex protocol; for each bit shifted out the - MOSI line (one per clock) another is shifted in on the MISO line. - Those bits are assembled into words of various sizes on the - way to and from system memory. - An additional chipselect line is usually active-low (nCS); - four signals are normally used for each peripheral, plus - sometimes an interrupt. - - - The SPI bus facilities listed here provide a generalized - interface to declare SPI busses and devices, manage them - according to the standard Linux driver model, and perform - input/output operations. - At this time, only "master" side interfaces are supported, - where Linux talks to SPI peripherals and does not implement - such a peripheral itself. - (Interfaces to support implementing SPI slaves would - necessarily look different.) - - - The programming interface is structured around two kinds of driver, - and two kinds of device. - A "Controller Driver" abstracts the controller hardware, which may - be as simple as a set of GPIO pins or as complex as a pair of FIFOs - connected to dual DMA engines on the other side of the SPI shift - register (maximizing throughput). Such drivers bridge between - whatever bus they sit on (often the platform bus) and SPI, and - expose the SPI side of their device as a - struct spi_master. - SPI devices are children of that master, represented as a - struct spi_device and manufactured from - struct spi_board_info descriptors which - are usually provided by board-specific initialization code. - A struct spi_driver is called a - "Protocol Driver", and is bound to a spi_device using normal - driver model calls. - - - The I/O model is a set of queued messages. Protocol drivers - submit one or more struct spi_message - objects, which are processed and completed asynchronously. - (There are synchronous wrappers, however.) Messages are - built from one or more struct spi_transfer - objects, each of which wraps a full duplex SPI transfer. - A variety of protocol tweaking options are needed, because - different chips adopt very different policies for how they - use the bits transferred with SPI. - -!Iinclude/linux/spi/spi.h -!Fdrivers/spi/spi.c spi_register_board_info -!Edrivers/spi/spi.c - - - - I<superscript>2</superscript>C and SMBus Subsystem - - - I2C (or without fancy typography, "I2C") - is an acronym for the "Inter-IC" bus, a simple bus protocol which is - widely used where low data rate communications suffice. - Since it's also a licensed trademark, some vendors use another - name (such as "Two-Wire Interface", TWI) for the same bus. - I2C only needs two signals (SCL for clock, SDA for data), conserving - board real estate and minimizing signal quality issues. - Most I2C devices use seven bit addresses, and bus speeds of up - to 400 kHz; there's a high speed extension (3.4 MHz) that's not yet - found wide use. - I2C is a multi-master bus; open drain signaling is used to - arbitrate between masters, as well as to handshake and to - synchronize clocks from slower clients. - - - - The Linux I2C programming interfaces support only the master - side of bus interactions, not the slave side. - The programming interface is structured around two kinds of driver, - and two kinds of device. - An I2C "Adapter Driver" abstracts the controller hardware; it binds - to a physical device (perhaps a PCI device or platform_device) and - exposes a struct i2c_adapter representing - each I2C bus segment it manages. - On each I2C bus segment will be I2C devices represented by a - struct i2c_client. Those devices will - be bound to a struct i2c_driver, - which should follow the standard Linux driver model. - (At this writing, a legacy model is more widely used.) - There are functions to perform various I2C protocol operations; at - this writing all such functions are usable only from task context. - - - - The System Management Bus (SMBus) is a sibling protocol. Most SMBus - systems are also I2C conformant. The electrical constraints are - tighter for SMBus, and it standardizes particular protocol messages - and idioms. Controllers that support I2C can also support most - SMBus operations, but SMBus controllers don't support all the protocol - options that an I2C controller will. - There are functions to perform various SMBus protocol operations, - either using I2C primitives or by issuing SMBus commands to - i2c_adapter devices which don't support those I2C operations. - - -!Iinclude/linux/i2c.h -!Fdrivers/i2c/i2c-boardinfo.c i2c_register_board_info -!Edrivers/i2c/i2c-core.c - - Clock Framework