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path: root/drivers/serial/serial-uclass.c
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* dm: serial: Allow the UART driver to be dropped from the imageSimon Glass2016-01-12-1/+3
| | | | | | | | | | | In very very space-constrained devices even the full UART driver is too large. In this case the debug UART can still be used in some cases. Add options to enable the UART driver in SPL and U-Boot proper. Enable both options by default. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Thomas Chou <thomas@wytron.com.tw>
* dm: serial: Minor coding style cleanup of some commentsStefan Roese2015-12-10-10/+10
| | | | | | | | | Fix incorrect comment alignments. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: serial: Deal with stdout-path with an aliasSimon Glass2015-11-04-5/+25
| | | | | | | | | | | | Sometimes stdout-path contains a UART alias along with speed, etc. For example: stdout-path = "serial0:115200n8"; Add support for decoding this. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* of: clean up OF_CONTROL ifdef conditionalsMasahiro Yamada2015-08-18-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We have flipped CONFIG_SPL_DISABLE_OF_CONTROL. We have cleansing devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear away the ugly logic in include/fdtdec.h: #ifdef CONFIG_OF_CONTROL # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL) # define OF_CONTROL 0 # else # define OF_CONTROL 1 # endif #else # define OF_CONTROL 0 #endif Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute. It refers to CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for SPL. Also, we no longer have to cancel CONFIG_OF_CONTROL in include/config_uncmd_spl.h and scripts/Makefile.spl. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
* dm: serial: Add a REQUIRE_SERIAL_CONSOLE option for boards with no serial portHans de Goede2015-08-10-3/+17
| | | | | | | | | | | | | | | | | | | | Currently the serial code assumes that there is always at least one serial port (and panics / crashes due to null pointer dereferences when there is none). This makes it impossible to use u-boot on boards where there is no (debug) serial port, because e.g. all uart pins are muxed to another function. This commit adds a CONFIG_REQUIRE_SERIAL_CONSOLE Kconfig option, which defaults to y (preserving existing behavior), which can be set to n on such boards to make them work. This commit only implements this for CONFIG_DM_SERIAL=y configs, as allowing running without a serial port for CONFIG_DM_SERIAL=n configs is non trivial, and is not necessary at this moment. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: serial: Correct logic in serial_find_console_or_panic()Simon Glass2015-08-05-1/+1
| | | | | | | | | | | | | In a final attempt to find a console UART this function uses the first first available serial device. However the check for a valid device is inverted. This code is only executed when there is in fact no serial UART, but at present it can fail to reach the panic_str() call in this case, and start trying to use a non-existent UART. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* sandbox: Move CONFIG_SANDBOX_SERIAL to KconfigSimon Glass2015-06-10-2/+3
| | | | | | Move this over to Kconfig and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: serial: Don't support CONFIG_CONS_INDEX with device treeSimon Glass2015-06-10-32/+37
| | | | | | | | This feature should be deprecated for new boards, and significantly adds to SPL code size. Drop it. Instead, we can use stdout-path in the /chosen node. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add a panic_str() function to reduce code sizeSimon Glass2015-04-23-1/+1
| | | | | | | | The printf() in panic() adds about 1.5KB of code size to SPL when compiled with Thumb-2. Provide a smaller version that does not support printf()-style arguments and use it in two commonly compiled places. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Add dev_get_uclass_priv() to access uclass private dataSimon Glass2015-04-16-2/+2
| | | | | | | | Add a convenience function to access the private data that a uclass stores for each of its devices. Convert over most existing uses for consistency and to provide an example for others. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: serial: remove bogus include <ns16550.h>Masahiro Yamada2015-03-25-2/+0
| | | | | | | | | | | Serial-uclass should be generically implemented without depending a particular hardware. Fortunately, nothing in include/ns16550.h is referenced from drivers/serial/serial-uclass.c, so remove this bogus include. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Tom Rini <trini@konsulko.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: Add support for all targets which requires MANUAL_RELOCMichal Simek2015-02-12-0/+16
| | | | | | | | | | Targets with CONFIG_NEEDS_MANUAL_RELOC do not use REL/RELA relocation (mostly only GOT) where functions aray are not updated. This patch is fixing function pointers for DM core and serial-uclass to ensure that relocated functions are called. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: Add a flag to control sequence numberingSimon Glass2015-01-29-0/+1
| | | | | | | | | | | | | | | | At present we try to use the 'reg' property and device tree aliases to give devices a sequence number. The 'reg' property is often actually a memory address, so the sequence numbers thus-obtained are not useful. It would be better if the devices were just sequentially numbered in that case. In fact neither I2C nor SPI use this feature, so drop it. Some devices need us to look up an alias to number them within the uclass. Add a flag to control this, so it is not done unless it is needed. Adjust the tests to test this new behaviour. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* fdt: remove fdtdec_get_alias_node() functionMasahiro Yamada2014-11-27-1/+1
| | | | | | | | | | The fdt_path_offset() checks an alias too. fdtdec_get_alias_node(blob, "foo") is equivalent to fdt_path_offset(blob, "foo"). Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* Merge git://git.denx.de/u-boot-dmTom Rini2014-11-24-3/+74
|\ | | | | | | | | | | | | Conflicts: drivers/serial/serial-uclass.c Signed-off-by: Tom Rini <trini@ti.com>
| * dm: Allow stdio registration to be droppedSimon Glass2014-11-21-3/+7
| | | | | | | | | | | | | | | | | | Provide a CONFIG_DM_STDIO option to enable registering a serial device with the stdio library. This is seldom useful in SPL, so disable it by default when building for SPL. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com>
| * dm: serial: Support changing the baud rateSimon Glass2014-11-21-0/+67
| | | | | | | | | | | | | | Implement this feature in the uclass so that the baudrate can be changed with 'setenv baudrate <rate>'. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: serial: Move current serial port pointer to global_dataSimon Glass2014-11-21-16/+19
|/ | | | | | | | | | | In general we can't store things in the data section until we have inited SDRAM. Some platforms allow this (e.g. those with SPL) but some don't. Move the pointer to global_data so that it will work on all platforms. Without this fix the serial port will not work prior to relocation with driver model on some platforms. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: serial: consolidate common code moreMasahiro Yamada2014-10-23-38/+41
| | | | | | | | | | | Commit b8893327e9d2 (dm: serial: Put common code into separate functions) consolidated getc() and putc(). This commit does more puts() and tsts(). Also rename locally used functions to _serial_*() for clarification because we have similar functions names here are there in this file. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: serial: remove unnecessary castingMasahiro Yamada2014-10-23-6/+2
| | | | | | | | The type (void *) can be directly passed to a function that takes a specific pointer type. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: serial: fix console putcMasahiro Yamada2014-10-23-3/+3
| | | | | | | | | | Commit b8893327e9d2 (dm: serial: Put common code into separate functions) consolidated getc() correctly, but introduced another bug to putc(); serial_stub_putc() passes sdev->priv to serial_putc_dev(), but serial_putc_dev() uses cur_dev instead of the given argument. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: serial: Support CONFIG_CONS_INDEX if availableSimon Glass2014-10-23-1/+10
| | | | | | | | Try to use this option to select the correct uart for the console. This mimics the behaviour of drivers/serial.c. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com>
* dm: serial: Reset the watchdog while waiting in getc()Simon Glass2014-10-23-0/+5
| | | | | | | | | | | | | We have moved the busy-wait loop out of drivers and into the uclass. This means that we must reset the watchdog when busy-waiting. Note: some drivers may still have a busy-wait even with driver model, as a transition mechanism. Driver model will tolerate this, and is can be cleaned up when all users of the driver use driver model. An example is ns16550. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com>
* dm: serial: Put common code into separate functionsSimon Glass2014-10-22-15/+17
| | | | | | | Avoid duplicating the code which deals with getc() and putc(). It is fairly simple, but may expand later. Signed-off-by: Simon Glass <sjg@chromium.org>
* serial-uclass: Fix compilation errorHans de Goede2014-10-10-1/+1
| | | | Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* stdio: Add force parameter to stdio_deregisterHans de Goede2014-10-06-1/+1
| | | | | | | In some cases we really want to move forward with a deregister, add a force parameter to allow this, and replace the dev with a nulldev in this case. Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* dm: serial: Don't require device tree to configure a consoleSimon Glass2014-09-23-1/+2
| | | | | | Allow serial_find_console_or_panic() to work without a device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add a uclass for serial devicesSimon Glass2014-09-10-0/+213
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>
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