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* dm: serial: use Driver Model for UniPhier serial driverMasahiro Yamada2014-10-23-0/+18
| | | | | | | | | | | | | | | | | This commit converts UniPhier on-chip serial driver to driver model. Since UniPhier SoCs do not have Device Tree support, some board files should be added under arch/arm/cpu/armv7/uniphier/ph1-*/ directories. (Device Tree support for UniPhier platform is still under way.) Now the base address and master clock frequency are passed from platform data, so CONFIG_SYS_UNIPHIER_SERIAL_BASE* and CONFIG_SYS_UNIPHIER_UART_CLK should be removed. Tested on UniPhier PH1-LD4 ref board. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: move platform data headers to include/dm/platform_dataMasahiro Yamada2014-10-23-0/+41
| | | | | | | | | | | | | | | | | | The platform_data definitions are generally referenced from both drivers and board files. That is why header files defining platform_data sturectures are placed in "include" directory, but our top level "include" directory is already too cluttered. Let's collect platform_data definitions under the directory "include/dm/platform_data" like Linux gathers ones around under "include/linux/platform_data". This commit moves two header files: include/serial_mxc.h -> include/dm/platform_data/serial_mxc.h include/serial_pl01x.h -> include/dm/platform_data/serial_pl01x.h Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* test: dm: Support memory leak checking as a core featureSimon Glass2014-10-23-0/+23
| | | | | | | | Check the state of the malloc() heap before each test is run, so that tests can verify that all is well at the end. Provide helper functions to mark the heap and to check that it returns to its initial state. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Add support for simple-busSimon Glass2014-10-22-0/+1
| | | | | | | Add a driver for the simple-bus nodes, which allows devices within these nodes to be bound. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Allow a list of devices to be declared in one stepSimon Glass2014-10-22-0/+4
| | | | | | | The U_BOOT_DEVICE macro allows the declaration of a single U-Boot device. Add an equivalent macro to declare an array of devices, for convenience. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: cros_ec: Add support for driver modelSimon Glass2014-10-22-0/+1
| | | | | | | | Add support for driver model if enabled. This involves minimal changes to the code, mostly just plumbing around the edges. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: sf: Add a uclass for SPI flashSimon Glass2014-10-22-0/+1
| | | | | | | | | | | Add a driver model uclass for SPI flash which supports the common operations (read, write, erase). Since we must keep support for the non-dm interface, some modification of the spi_flash header is required. CONFIG_DM_SPI_FLASH is used to enable driver model for SPI flash. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: sandbox: Add a SPI emulation uclassSimon Glass2014-10-22-0/+1
| | | | | | | | | | | | | | | | | U-Boot includes a SPI emulation driver already but it is not explicit, and is hidden in the SPI flash code. Conceptually with sandbox's SPI implementation we have a layer which creates SPI bus transitions and a layer which interprets them, currently only for SPI flash. The latter is actually an emulation, and it should be possible to add more than one emulation - not just SPI flash. Add a SPI emulation uclass so that other emulations can be plugged in to support different types of emulated devices on difference buses/chip selects. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: spi: Add a uclass for SPISimon Glass2014-10-22-0/+2
| | | | | | | | | | | | | | | | Add a uclass which provides access to SPI buses and includes operations required by SPI. For a time driver model will need to co-exist with the legacy SPI interface so some parts of the header file are changed depending on which is in use. The exports are adjusted also since some functions are not available with driver model. Boards must define CONFIG_DM_SPI to use driver model for SPI. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> (Discussed some follow-up comments which will address in future add-ons)
* dm: core: Add a clarifying comment on struct udevice's seq memberSimon Glass2014-10-22-1/+2
| | | | | | | The sequence number is unique within the uclass, so state this clearly. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: core: Allow parents to pass data to children during probeSimon Glass2014-10-22-0/+17
| | | | | | | | | | | Buses sometimes want to pass data to their children when they are probed. For example, a SPI bus may want to tell the slave device about the chip select it is connected to. Add a new function to permit the parent data to be supplied to the child. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: core: Add functions for iterating through device childrenSimon Glass2014-10-22-0/+18
| | | | | | | | Buses need to iterate through their children in some situations. Add a few functions to make this easy. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: add of_match_ptr() macroMasahiro Yamada2014-10-22-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver model supports two ways for passing device parameters; Device Tree and platform_data (board file). Each driver should generally support both of them because some popular IPs are used on various platforms. Assume the following scenario: - The driver Foo is used on SoC Bar and SoC Baz - The SoC Bar uses Device Tree control (CONFIG_OF_CONTROL=y) - The SoC Baz does not support Device Tree; uses a board file In this situation, the device driver Foo should work with/without the device tree control. The driver should have .of_match and .ofdata_to_platdata members for SoC Bar, while they are meaningless for SoC Baz; therefore those device-tree control code should go inside #ifdef CONFIG_OF_CONTROL. The driver code will be like this: #ifdef CONFIG_OF_CONTROL static const struct udevice_id foo_of_match = { { .compatible = "foo_driver" }, {}, } static int foo_ofdata_to_platdata(struct udevice *dev) { ... } #endif U_BOOT_DRIVER(foo_driver) = { ... .of_match = of_match_ptr(foo_of_match), .ofdata_to_platdata = of_match_ptr(foo_ofdata_to_platdata), ... } This idea has been borrowed from Linux. (In Linux, this macro is defined in include/linux/of.h) Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: fix include guardMasahiro Yamada2014-10-22-0/+1
| | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: include <linker_lists.h> from platdata.h and uclass.hMasahiro Yamada2014-10-22-0/+3
| | | | | | | | | The header files include/dm/platdata.h and include/dm/uclass.h use ll_entry_declare(); therefore they depend on include/linker_lists.h. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: fix commentsMasahiro Yamada2014-10-22-3/+3
| | | | | | | | | The struct udevice stands for a device, not a driver. The driver_info.name is a driver's name, which is referenced to bind devices. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: Add a uclass for serial devicesSimon Glass2014-09-10-0/+1
| | | | | | | | Serial devices support simple byte input/output and a few operations to find out whether data is available. Add a basic uclass for serial devices to be used by drivers that are converted to driver model. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Adjust lists_bind_fdt() to return the bound deviceSimon Glass2014-09-10-1/+5
| | | | | | | Allow the caller to find out the device that was bound in response to this call. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add dm_scan_other() to locate board-specific devicesSimon Glass2014-07-23-0/+13
| | | | | | | | Some boards will have devices which are not in the device tree and do not have platform data. They may be programnatically created, for example. Add a hook which boards can use to bind those devices early in boot. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add child_pre_probe() and child_post_remove() methodsSimon Glass2014-07-23-0/+10
| | | | | | | | | | | Some devices (particularly bus devices) must track their children, knowing when a new child is added so that it can be set up for communication on the bus. Add a child_pre_probe() method to provide this feature, and a corresponding child_post_remove() method. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Introduce per-child data for devicesSimon Glass2014-07-23-0/+29
| | | | | | | | | | | | | Some device types can have child devices and want to store information about them. For example a USB flash stick attached to a USB host controller would likely use this space. The controller can hold information about the USB state of each of its children. The data is stored attached to the child device in the 'parent_priv' member. It can be auto-allocated by dm when the child is probed. To do this, add a per_child_auto_alloc_size value to the parent driver. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add functions to access a device's childrenSimon Glass2014-07-23-0/+58
| | | | | | | | | | | | | | | | | Devices can have childen that can be addressed by a simple index, the sequence number or a device tree offset. Add functions to access a child in each of these ways. The index is typically used as a fallback when the sequence number is not available. For example we may use a serial UART with sequence number 0 as the console, but if no UART has sequence number 0, then we can fall back to just using the first UART (index 0). The device tree offset function is useful for buses, where they want to locate one of their children. The device tree can be scanned to find the offset of each child, and that offset can then find the device. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Provide a function to scan child FDT nodesSimon Glass2014-07-23-0/+26
| | | | | | | | | | | | | | At present only root nodes in the device tree are scanned for devices. But some devices can have children. For example a SPI bus may have several children for each of its chip selects. Add a function which scans subnodes and binds devices for each one. This can be used for the root node scan also, so change it. A device can call this function in its bind() or probe() methods to bind its children. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Tidy up some header file commentsSimon Glass2014-07-23-6/+13
| | | | | | Fix up the style of a few comments and add/clarify a few others. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow a device to be found by its FDT offsetSimon Glass2014-07-23-0/+16
| | | | | | | | Each device that was bound from a device tree has an node that caused it to be bound. Add functions that find and return a device based on a device tree offset. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Introduce device sequence numberingSimon Glass2014-07-23-0/+83
| | | | | | | | | | | | | | | | | | | | | | | | | In U-Boot it is pretty common to number devices from 0 and access them on the command line using this numbering. While it may come to pass that we will move away from this numbering, the possibility seems remote at present. Given that devices within a uclass will have an implied numbering, it makes sense to build this into driver model as a core feature. The cost is fairly small in terms of code and data space. With each uclass having numbered devices we can ask for SPI port 0 or serial port 1 and receive a single device. Devices typically request a sequence number using aliases in the device tree. These are resolved when the device is probed, to deal with conflicts. Sequence numbers need not be sequential and holes are permitted. At present there is no support for sequence numbers using static platform data. It could easily be added to 'struct driver_info' if needed, but it seems better to add features as we find a use for them, and the use of -1 to mean 'no sequence' makes the default value somewhat painful. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Support driver model prior to relocationSimon Glass2014-07-23-0/+13
| | | | | | | Initialise devices marked 'pre-reloc' and make them available prior to relocation. Note that this requires pre-reloc malloc() to be available. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow drivers to be marked 'before relocation'Simon Glass2014-07-23-5/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | Driver model currently only operates after relocation is complete. In this state U-Boot typically has a small amount of memory available. In adding support for driver model prior to relocation we must try to use as little memory as possible. In addition, on some machines the memory has not be inited and/or the CPU is not running at full speed or the data cache is off. These can reduce execution performance, so the less initialisation that is done before relocation the better. An immediately-obvious improvement is to only initialise drivers which are actually going to be used before relocation. On many boards the only such driver is a serial UART, so this provides a very large potential benefit. Allow drivers to mark themselves as 'pre-reloc' which means that they will be initialised prior to relocation. This can be done either with a driver flag or with a 'dm,pre-reloc' device tree property. To support this, the various dm scanning function now take a 'pre_reloc_only' parameter which indicates that only drivers marked pre-reloc should be bound. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Provide a way to shut down driver modelSimon Glass2014-07-23-0/+8
| | | | | | | Add a new method which removes and unbinds all drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* dm: Tidy up four minor code nitsSimon Glass2014-06-20-6/+28
| | | | | | | | | | | | There is a spelling mistake and two functions are missing comments altogether. Also the flags declaration is correct, but doesn't follow style. Finally, the uclass_get_device() function has some errors in its documentation. Fix these problems. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* dm: Cast away the const-ness of the global_data pointerSimon Glass2014-06-20-0/+4
| | | | | | | In a very few cases we need to adjust the driver model root device, such as when setting it up at initialisation. Add a macro to make this easier. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Rename struct device_id to udevice_idSimon Glass2014-06-20-3/+3
| | | | | | | It is best to avoid having any occurence of 'struct device' in driver model, so rename to achieve this. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: rename device struct to udeviceHeiko Schocher2014-05-27-42/+42
| | | | | | | | | | | | using UBI and DM together leads in compiler error, as both define a "struct device", so rename "struct device" in include/dm/device.h to "struct udevice", as we use linux code (MTD/UBI/UBIFS some USB code,...) and cannot change the linux "struct device" Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Marek Vasut <marex@denx.de>
* dm: Add basic testsSimon Glass2014-03-04-0/+262
| | | | | | | | | | | | | | | | | | | | Add some tests of driver model functionality. Coverage includes: - basic init - binding of drivers to devices using platform_data - automatic probing of devices when referenced - availability of platform data to devices - lifecycle from bind to probe to remove to unbind - renumbering within a uclass when devices are probed/removed - calling driver-defined operations - deactivation of drivers when removed - memory leak across creation and destruction of drivers/uclasses - uclass init/destroy methods - automatic probe/remove of children/parents when needed This function is enabled for sandbox, using CONFIG_DM_TEST. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add base driver model supportSimon Glass2014-03-04-0/+644
Add driver model functionality for generic board. This includes data structures and base code for registering devices and uclasses (groups of devices with the same purpose, e.g. all I2C ports will be in the same uclass). The feature is enabled with CONFIG_DM. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
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