diff options
Diffstat (limited to 'Documentation/arm/Samsung-S3C24XX')
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt | 58 | ||||
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/GPIO.txt | 122 | ||||
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/H1940.txt | 40 | ||||
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/Overview.txt | 156 | ||||
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/SMDK2440.txt | 56 | ||||
| -rw-r--r-- | Documentation/arm/Samsung-S3C24XX/Suspend.txt | 106 |
6 files changed, 538 insertions, 0 deletions
diff --git a/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt b/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt new file mode 100644 index 000000000000..000e3d7a78b2 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt @@ -0,0 +1,58 @@ + Simtec Electronics EB2410ITX (BAST) + =================================== + + http://www.simtec.co.uk/products/EB2410ITX/ + +Introduction +------------ + + The EB2410ITX is a S3C2410 based development board with a variety of + peripherals and expansion connectors. This board is also known by + the shortened name of Bast. + + +Configuration +------------- + + To set the default configuration, use `make bast_defconfig` which + supports the commonly used features of this board. + + +Support +------- + + Official support information can be found on the Simtec Electronics + website, at the product page http://www.simtec.co.uk/products/EB2410ITX/ + + Useful links: + + - Resources Page http://www.simtec.co.uk/products/EB2410ITX/resources.html + + - Board FAQ at http://www.simtec.co.uk/products/EB2410ITX/faq.html + + - Bootloader info http://www.simtec.co.uk/products/SWABLE/resources.html + and FAQ http://www.simtec.co.uk/products/SWABLE/faq.html + + +MTD +--- + + The NAND and NOR support has been merged from the linux-mtd project. + Any prolbems, see http://www.linux-mtd.infradead.org/ for more + information or up-to-date versions of linux-mtd. + + +IDE +--- + + Both onboard IDE ports are supported, however there is no support for + changing speed of devices, PIO Mode 4 capable drives should be used. + + +Maintainers +----------- + + This board is maintained by Simtec Electronics. + + +(c) 2004 Ben Dooks, Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/GPIO.txt b/Documentation/arm/Samsung-S3C24XX/GPIO.txt new file mode 100644 index 000000000000..0822764ec270 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/GPIO.txt @@ -0,0 +1,122 @@ + S3C2410 GPIO Control + ==================== + +Introduction +------------ + + The s3c2410 kernel provides an interface to configure and + manipulate the state of the GPIO pins, and find out other + information about them. + + There are a number of conditions attached to the configuration + of the s3c2410 GPIO system, please read the Samsung provided + data-sheet/users manual to find out the complete list. + + +Headers +------- + + See include/asm-arm/arch-s3c2410/regs-gpio.h for the list + of GPIO pins, and the configuration values for them. This + is included by using #include <asm/arch/regs-gpio.h> + + The GPIO management functions are defined in the hardware + header include/asm-arm/arch-s3c2410/hardware.h which can be + included by #include <asm/arch/hardware.h> + + A useful ammount of documentation can be found in the hardware + header on how the GPIO functions (and others) work. + + Whilst a number of these functions do make some checks on what + is passed to them, for speed of use, they may not always ensure + that the user supplied data to them is correct. + + +PIN Numbers +----------- + + Each pin has an unique number associated with it in regs-gpio.h, + eg S3C2410_GPA0 or S3C2410_GPF1. These defines are used to tell + the GPIO functions which pin is to be used. + + +Configuring a pin +----------------- + + The following function allows the configuration of a given pin to + be changed. + + void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function); + + Eg: + + s3c2410_gpio_cfgpin(S3C2410_GPA0, S3C2410_GPA0_ADDR0); + s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1); + + which would turn GPA0 into the lowest Address line A0, and set + GPE8 to be connected to the SDIO/MMC controller's SDDAT1 line. + + +Reading the current configuration +--------------------------------- + + The current configuration of a pin can be read by using: + + s3c2410_gpio_getcfg(unsigned int pin); + + The return value will be from the same set of values which can be + passed to s3c2410_gpio_cfgpin(). + + +Configuring a pull-up resistor +------------------------------ + + A large proportion of the GPIO pins on the S3C2410 can have weak + pull-up resistors enabled. This can be configured by the following + function: + + void s3c2410_gpio_pullup(unsigned int pin, unsigned int to); + + Where the to value is zero to set the pull-up off, and 1 to enable + the specified pull-up. Any other values are currently undefined. + + +Getting the state of a PIN +-------------------------- + + The state of a pin can be read by using the function: + + unsigned int s3c2410_gpio_getpin(unsigned int pin); + + This will return either zero or non-zero. Do not count on this + function returning 1 if the pin is set. + + +Setting the state of a PIN +-------------------------- + + The value an pin is outputing can be modified by using the following: + + void s3c2410_gpio_setpin(unsigned int pin, unsigned int to); + + Which sets the given pin to the value. Use 0 to write 0, and 1 to + set the output to 1. + + +Getting the IRQ number associated with a PIN +-------------------------------------------- + + The following function can map the given pin number to an IRQ + number to pass to the IRQ system. + + int s3c2410_gpio_getirq(unsigned int pin); + + Note, not all pins have an IRQ. + + +Authour +------- + + +Ben Dooks, 03 October 2004 +(c) 2004 Ben Dooks, Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/H1940.txt b/Documentation/arm/Samsung-S3C24XX/H1940.txt new file mode 100644 index 000000000000..d6b1de92b111 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/H1940.txt @@ -0,0 +1,40 @@ + HP IPAQ H1940 + ============= + +http://www.handhelds.org/projects/h1940.html + +Introduction +------------ + + The HP H1940 is a S3C2410 based handheld device, with + bluetooth connectivity. + + +Support +------- + + A variety of information is available + + handhelds.org project page: + + http://www.handhelds.org/projects/h1940.html + + handhelds.org wiki page: + + http://handhelds.org/moin/moin.cgi/HpIpaqH1940 + + Herbert Pötzl pages: + + http://vserver.13thfloor.at/H1940/ + + +Maintainers +----------- + + This project is being maintained and developed by a variety + of people, including Ben Dooks, Arnaud Patard, and Herbert Pötzl. + + Thanks to the many others who have also provided support. + + +(c) 2005 Ben Dooks
\ No newline at end of file diff --git a/Documentation/arm/Samsung-S3C24XX/Overview.txt b/Documentation/arm/Samsung-S3C24XX/Overview.txt new file mode 100644 index 000000000000..3af4d29a8938 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/Overview.txt @@ -0,0 +1,156 @@ + S3C24XX ARM Linux Overview + ========================== + + + +Introduction +------------ + + The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported + by the 's3c2410' architecture of ARM Linux. Currently the S3C2410 and + the S3C2440 are supported CPUs. + + +Configuration +------------- + + A generic S3C2410 configuration is provided, and can be used as the + default by `make s3c2410_defconfig`. This configuration has support + for all the machines, and the commonly used features on them. + + Certain machines may have their own default configurations as well, + please check the machine specific documentation. + + +Machines +-------- + + The currently supported machines are as follows: + + Simtec Electronics EB2410ITX (BAST) + + A general purpose development board, see EB2410ITX.txt for further + details + + Samsung SMDK2410 + + Samsung's own development board, geared for PDA work. + + Samsung/Meritech SMDK2440 + + The S3C2440 compatible version of the SMDK2440 + + Thorcom VR1000 + + Custom embedded board + + HP IPAQ 1940 + + Handheld (IPAQ), available in several varieties + + HP iPAQ rx3715 + + S3C2440 based IPAQ, with a number of variations depending on + features shipped. + + Acer N30 + + A S3C2410 based PDA from Acer. There is a Wiki page at + http://handhelds.org/moin/moin.cgi/AcerN30Documentation . + + +Adding New Machines +------------------- + + The archicture has been designed to support as many machines as can + be configured for it in one kernel build, and any future additions + should keep this in mind before altering items outside of their own + machine files. + + Machine definitions should be kept in linux/arch/arm/mach-s3c2410, + and there are a number of examples that can be looked at. + + Read the kernel patch submission policies as well as the + Documentation/arm directory before submitting patches. The + ARM kernel series is managed by Russell King, and has a patch system + located at http://www.arm.linux.org.uk/developer/patches/ + as well as mailing lists that can be found from the same site. + + As a courtesy, please notify <ben-linux@fluff.org> of any new + machines or other modifications. + + Any large scale modifications, or new drivers should be discussed + on the ARM kernel mailing list (linux-arm-kernel) before being + attempted. + + +NAND +---- + + The current kernels now have support for the s3c2410 NAND + controller. If there are any problems the latest linux-mtd + CVS can be found from http://www.linux-mtd.infradead.org/ + + +Serial +------ + + The s3c2410 serial driver provides support for the internal + serial ports. These devices appear as /dev/ttySAC0 through 3. + + To create device nodes for these, use the following commands + + mknod ttySAC0 c 204 64 + mknod ttySAC1 c 204 65 + mknod ttySAC2 c 204 66 + + +GPIO +---- + + The core contains support for manipulating the GPIO, see the + documentation in GPIO.txt in the same directory as this file. + + +Clock Management +---------------- + + The core provides the interface defined in the header file + include/asm-arm/hardware/clock.h, to allow control over the + various clock units + + +Port Contributors +----------------- + + Ben Dooks (BJD) + Vincent Sanders + Herbert Potzl + Arnaud Patard (RTP) + Roc Wu + Klaus Fetscher + Dimitry Andric + Shannon Holland + Guillaume Gourat (NexVision) + Christer Weinigel (wingel) (Acer N30) + Lucas Correia Villa Real (S3C2400 port) + + +Document Changes +---------------- + + 05 Sep 2004 - BJD - Added Document Changes section + 05 Sep 2004 - BJD - Added Klaus Fetscher to list of contributors + 25 Oct 2004 - BJD - Added Dimitry Andric to list of contributors + 25 Oct 2004 - BJD - Updated the MTD from the 2.6.9 merge + 21 Jan 2005 - BJD - Added rx3715, added Shannon to contributors + 10 Feb 2005 - BJD - Added Guillaume Gourat to contributors + 02 Mar 2005 - BJD - Added SMDK2440 to list of machines + 06 Mar 2005 - BJD - Added Christer Weinigel + 08 Mar 2005 - BJD - Added LCVR to list of people, updated introduction + 08 Mar 2005 - BJD - Added section on adding machines + +Document Author +--------------- + +Ben Dooks, (c) 2004-2005 Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/SMDK2440.txt b/Documentation/arm/Samsung-S3C24XX/SMDK2440.txt new file mode 100644 index 000000000000..32e1eae6a25f --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/SMDK2440.txt @@ -0,0 +1,56 @@ + Samsung/Meritech SMDK2440 + ========================= + +Introduction +------------ + + The SMDK2440 is a two part evaluation board for the Samsung S3C2440 + processor. It includes support for LCD, SmartMedia, Audio, SD and + 10MBit Ethernet, and expansion headers for various signals, including + the camera and unused GPIO. + + +Configuration +------------- + + To set the default configuration, use `make smdk2440_defconfig` which + will configure the common features of this board, or use + `make s3c2410_config` to include support for all s3c2410/s3c2440 machines + + +Support +------- + + Ben Dooks' SMDK2440 site at http://www.fluff.org/ben/smdk2440/ which + includes linux based USB download tools. + + Some of the h1940 patches that can be found from the H1940 project + site at http://www.handhelds.org/projects/h1940.html can also be + applied to this board. + + +Peripherals +----------- + + There is no current support for any of the extra peripherals on the + base-board itself. + + +MTD +--- + + The NAND flash should be supported by the in kernel MTD NAND support, + NOR flash will be added later. + + +Maintainers +----------- + + This board is being maintained by Ben Dooks, for more info, see + http://www.fluff.org/ben/smdk2440/ + + Many thanks to Dimitry Andric of TomTom for the loan of the SMDK2440, + and to Simtec Electronics for allowing me time to work on this. + + +(c) 2004 Ben Dooks
\ No newline at end of file diff --git a/Documentation/arm/Samsung-S3C24XX/Suspend.txt b/Documentation/arm/Samsung-S3C24XX/Suspend.txt new file mode 100644 index 000000000000..e12bc3284a27 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/Suspend.txt @@ -0,0 +1,106 @@ + S3C24XX Suspend Support + ======================= + + +Introduction +------------ + + The S3C2410 supports a low-power suspend mode, where the SDRAM is kept + in Self-Refresh mode, and all but the essential peripheral blocks are + powered down. For more information on how this works, please look + at the S3C2410 datasheets from Samsung. + + +Requirements +------------ + + 1) A bootloader that can support the necessary resume operation + + 2) Support for at least 1 source for resume + + 3) CONFIG_PM enabled in the kernel + + 4) Any peripherals that are going to be powered down at the same + time require suspend/resume support. + + +Resuming +-------- + + The S3C2410 user manual defines the process of sending the CPU to + sleep and how it resumes. The default behaviour of the Linux code + is to set the GSTATUS3 register to the physical address of the + code to resume Linux operation. + + GSTATUS4 is currently left alone by the sleep code, and is free to + use for any other purposes (for example, the EB2410ITX uses this to + save memory configuration in). + + +Machine Support +--------------- + + The machine specific functions must call the s3c2410_pm_init() function + to say that its bootloader is capable of resuming. This can be as + simple as adding the following to the machine's definition: + + INITMACHINE(s3c2410_pm_init) + + A board can do its own setup before calling s3c2410_pm_init, if it + needs to setup anything else for power management support. + + There is currently no support for over-riding the default method of + saving the resume address, if your board requires it, then contact + the maintainer and discuss what is required. + + Note, the original method of adding an late_initcall() is wrong, + and will end up initialising all compiled machines' pm init! + + +Debugging +--------- + + There are several important things to remember when using PM suspend: + + 1) The uart drivers will disable the clocks to the UART blocks when + suspending, which means that use of printascii() or similar direct + access to the UARTs will cause the debug to stop. + + 2) Whilst the pm code itself will attempt to re-enable the UART clocks, + care should be taken that any external clock sources that the UARTs + rely on are still enabled at that point. + + +Configuration +------------- + + The S3C2410 specific configuration in `System Type` defines various + aspects of how the S3C2410 suspend and resume support is configured + + `S3C2410 PM Suspend debug` + + This option prints messages to the serial console before and after + the actual suspend, giving detailed information on what is + happening + + + `S3C2410 PM Suspend Memory CRC` + + Allows the entire memory to be checksummed before and after the + suspend to see if there has been any corruption of the contents. + + This support requires the CRC32 function to be enabled. + + + `S3C2410 PM Suspend CRC Chunksize (KiB)` + + Defines the size of memory each CRC chunk covers. A smaller value + will mean that the CRC data block will take more memory, but will + identify any faults with better precision + + +Document Author +--------------- + +Ben Dooks, (c) 2004 Simtec Electronics + |