Commit Graph

23 Commits

Author SHA1 Message Date
Damien George
797c2e8fc2 stm32/storage: Make start/len args of pyb.Flash keyword only.
To allow the future possibility of initial positional args, like flash id.
2019-11-26 21:35:00 +11:00
Damien George
d8057c325a stm32/storage: Change storage_read/write_blocks to return int type.
And return -MP_EIO if calling storage_read_block/storage_write_block fails.
This lines up with the return type and value (negative for error) of the
calls to MICROPY_HW_BDEV_READBLOCKS (and WRITEBLOCKS, and BDEV2 versions).
2019-11-26 00:08:57 +11:00
Damien George
7897f5d9be stm32/main: Auto detect block device used for main filesystem. 2019-11-26 00:07:09 +11:00
Damien George
c169094f61 stm32/storage: Make pyb.Flash configurable, and support ext block proto.
The pyb.Flash() class can now be used to construct objects which reference
sections of the flash storage, starting at a certain offset and going for a
certain length.  Such objects also support the extended block protocol.
The signature for the constructor is: pyb.Flash(start=-1, len=-1).
2019-11-26 00:07:09 +11:00
Damien George
7723dac337 stm32: Generalise flash mounting code so it supports arbitrary FS.
This commit refactors and generalises the boot-mount routine on stm32 so
that it can mount filesystems of arbitrary type.  That is, it no longer
assumes that the filesystem is FAT.  It does this by using mp_vfs_mount()
which does auto-detection of the filesystem type.
2019-11-25 18:10:58 +11:00
Damien George
cfe1c5abf8 extmod/vfs: Rename BP_IOCTL_xxx constants to MP_BLOCKDEV_IOCTL_xxx.
Also rename SEC_COUNT to BLOCK_COUNT and SEC_SIZE to BLOCK_SIZE.
2019-10-29 14:17:29 +11:00
Damien George
9aabb6c01b extmod: Factor out block-device struct to make independent of fatfs. 2019-10-29 12:12:37 +11:00
Damien George
1bcf4afb10 stm32/systick: Make periodic systick callbacks use a cyclic func table.
Instead of checking each callback (currently storage and dma) explicitly
for each SysTick IRQ, use a simple circular function table indexed by the
lower bits of the millisecond tick counter.  This allows callbacks to be
easily enabled/disabled at runtime, and scales well to a large number of
callbacks.
2019-02-08 01:20:13 +11:00
Damien George
0941a467e7 stm32: Change flash IRQ priority from 2 to 6 to prevent preemption.
The flash-IRQ handler is used to flush the storage cache, ie write
outstanding block data from RAM to flash.  This is triggered by a timeout,
or by a direct call to flush all storage caches.

Prior to this commit, a timeout could trigger the cache flushing to occur
during the execution of a read/write to external SPI flash storage.  In
such a case the storage subsystem would break down.

SPI storage transfers are already protected against USB IRQs, so by
changing the priority of the flash IRQ to that of the USB IRQ (what is
done in this commit) the SPI transfers can be protected against any
timeouts triggering a cache flush (the cache flush would be postponed until
after the transfer finished, but note that in the case of SPI writes the
timeout is rescheduled after the transfer finishes).

The handling of internal flash sync'ing needs to be changed to directly
call flash_bdev_irq_handler() sync may be called with the IRQ priority
already raised (eg when called from a USB MSC IRQ handler).
2018-09-12 15:46:04 +10:00
Damien George
e1ae9939ac stm32: Support compiling with object representation D.
With this and previous patches the stm32 port can now be compiled using
object representation D (nan boxing).  Note that native code and frozen mpy
files with float constants are currently not supported with this object
representation.
2018-07-08 23:25:11 +10:00
Damien George
f497723802 stm32: Allow to have no storage support if there are no block devices.
If no block devices are defined by a board then storage support will be
disabled.  This means there is no filesystem provided by either the
internal flash or external SPI flash.  But the VFS system can still be
enabled and filesystems provided on external devices like an SD card.
2018-05-28 21:45:46 +10:00
Damien George
a03e6c1e05 stm32/irq: Define IRQ priorities directly as encoded hardware values.
For a given IRQn (eg UART) there's no need to carry around both a PRI and
SUBPRI value (eg IRQ_PRI_UART, IRQ_SUBPRI_UART).  Instead, the IRQ_PRI_UART
value has been changed in this patch to be the encoded hardware value,
using NVIC_EncodePriority.  This way the NVIC_SetPriority function can be
used directly, instead of going through HAL_NVIC_SetPriority which must do
extra processing to encode the PRI+SUBPRI.

For a priority grouping of 4 (4 bits for preempt priority, 0 bits for the
sub-priority), which is used in the stm32 port, the IRQ_PRI_xxx constants
remain unchanged in their value.

This patch also "fixes" the use of raise_irq_pri() which should be passed
the encoded value (but as mentioned above the unencoded value is the same
as the encoded value for priority grouping 4, so there was no bug from this
error).
2018-05-02 14:41:02 +10:00
Damien George
0d5bccad11 stm32/storage: Provide support for a second block device. 2018-03-10 01:03:27 +11:00
Damien George
626d6c9756 stm32/storage: Introduce MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE cfg.
This config variable controls whether to support storage on the internal
flash of the MCU.  It is enabled by default and should be explicitly
disabled by boards that don't want internal flash storage.
2018-03-10 00:59:43 +11:00
Damien George
d1c4bd69df stm32/storage: Remove all SPI-flash bdev cfg, to be provided per board.
If a board wants to use SPI flash for storage then it must now provide the
configuration itself, using the MICROPY_HW_BDEV_xxx macros.
2018-03-10 00:59:43 +11:00
Damien George
1803e8ef22 stm32/storage: Make spi_bdev interface take a data pointer as first arg.
This allows a board to have multiple instances of the SPI block device.
2018-03-10 00:59:43 +11:00
Damien George
1e4caf0b1e stm32/storage: Merge all misc block-dev funcs into a single ioctl func.
It makes it cleaner, and simpler to support multiple different block
devices.  It also allows to easily extend a given block device with new
ioctl operations.
2018-03-10 00:59:43 +11:00
Damien George
8bd0a51ca9 stm32/spibdev: Convert to use multiple block read/write interface.
The spiflash driver now supports read/write of multiple blocks at a time.
2018-03-03 00:13:15 +11:00
Damien George
861080aa3d stm32/storage: Add option for bdev to supply readblock/writeblocks.
If the underlying block device supports it, it's more efficient to
read/write multiple blocks at once.
2018-03-02 23:57:53 +11:00
Damien George
a0dfc38641 stm32/spibdev: Update to work with new spiflash driver. 2018-03-02 23:55:40 +11:00
Damien George
fa13e0d35b stm32: Factor out flash and SPI block-device code to separate files.
Prior to this patch, storage.c was a combination of code that handled
either internal flash or external SPI flash and exposed one of them as a
block device for the local storage.  It was also exposed to the USB MSC.

This patch splits out the flash and SPI code to separate files, which each
provide a general block-device interface (at the C level).  Then storage.c
just picks one of them to use as the local storage medium.  The aim of this
factoring is to allow to add new block devices in the future and allow for
easier configurability.
2018-02-13 22:21:46 +11:00
Tobias Badertscher
bd71b3252a stm32/boards: Add new board B_L475E_IOT01A based on STM32L475. 2017-09-10 16:02:39 +10:00
Damien George
01dd7804b8 ports: Make new ports/ sub-directory and move all ports there.
This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.
2017-09-06 13:40:51 +10:00