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path: root/src/soc/rockchip/common/spi.c
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2017-05-24soc/rockchip: Move spi driver to use spi_bus_mapFurquan Shaikh
This is in preparation to get rid of the strong spi_setup_slave implemented by different platforms. BUG=b:38430839 Change-Id: I66b1b9635ece2381f62f2a9d6f5744d639d59163 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/19771 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
2017-05-05drivers/spi: Re-factor spi_crop_chunkFurquan Shaikh
spi_crop_chunk is a property of the SPI controller since it depends upon the maximum transfer size that is supported by the controller. Also, it is possible to implement this within spi-generic layer by obtaining following parameters from the controller: 1. max_xfer_size: Maximum transfer size supported by the controller (Size of 0 indicates invalid size, and unlimited transfer size is indicated by UINT32_MAX.) 2. deduct_cmd_len: Whether cmd_len needs to be deducted from the max_xfer_size to determine max data size that can be transferred. (This is used by the amd boards.) Change-Id: I81c199413f879c664682088e93bfa3f91c6a46e5 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/19386 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Tested-by: coreboot org <coreboot.org@gmail.com>
2016-12-05spi: Define and use spi_ctrlr structureFurquan Shaikh
1. Define a new structure spi_ctrlr that allows platforms to define callbacks for spi operations (claim bus, release bus, transfer). 2. Add a new member (pointer to spi_ctrlr structure) in spi_slave structure which will be initialized by call to spi_setup_slave. 3. Define spi_claim_bus, spi_release_bus and spi_xfer in spi-generic.c which will make appropriate calls to ctrlr functions. BUG=chrome-os-partner:59832 BRANCH=None TEST=Compiles successfully Change-Id: Icb2326e3aab1e8f4bef53f553f82b3836358c55e Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17684 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-12-05spi: Pass pointer to spi_slave structure in spi_setup_slaveFurquan Shaikh
For spi_setup_slave, instead of making the platform driver return a pointer to spi_slave structure, pass in a structure pointer that can be filled in by the driver as required. This removes the need for platform drivers to maintain a slave structure in data/CAR section. BUG=chrome-os-partner:59832 BRANCH=None TEST=Compiles successfully Change-Id: Ia15a4f88ef4dcfdf616bb1c22261e7cb642a7573 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17683 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-12-05spi: Fix parameter types for spi functionsFurquan Shaikh
1. Use size_t instead of unsigned int for bytes_out and bytes_in. 2. Use const attribute for spi_slave structure passed into xfer, claim bus and release bus functions. BUG=chrome-os-partner:59832 BRANCH=None TEST=Compiles successfully Change-Id: Ie70b3520b51c42d750f907892545510c6058f85a Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17682 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-11-22spi: Clean up SPI flash driver interfaceFurquan Shaikh
RW flag was added to spi_slave structure to get around a requirement on some AMD flash controllers that need to group together all spi volatile operations (write/erase). This rw flag is not a property or attribute of the SPI slave or controller. Thus, instead of saving it in spi_slave structure, clean up the SPI flash driver interface. This allows chipsets/mainboards (that require volatile operations to be grouped) to indicate beginning and end of such grouped operations. New user APIs are added to allow users to perform probe, read, write, erase, volatile group begin and end operations. Callbacks defined in spi_flash structure are expected to be used only by the SPI flash driver. Any chipset that requires grouping of volatile operations can select the newly added Kconfig option SPI_FLASH_HAS_VOLATILE_GROUP and define callbacks for chipset_volatile_group_{begin,end}. spi_claim_bus/spi_release_bus calls have been removed from the SPI flash chip drivers which end up calling do_spi_flash_cmd since it already has required calls for claiming and releasing SPI bus before performing a read/write operation. BUG=None BRANCH=None TEST=Compiles successfully. Change-Id: Idfc052e82ec15b6c9fa874cee7a61bd06e923fbf Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17462 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-10-06rockchip: spi: Add support for 16-bit APB readsSimon Glass
With a SPI clock above about 24MHz the APB cannot keep up when doing individual byte transfers. Adjust the driver to use 16-bit reads when it can, to remove this bottleneck. Any transaction which involves writing bytes still uses 8-bit transfers, to simplify the code. These are the transfers that are not time-critical since they tend to be small. The case that really matters is reading from SPI flash. In general we can use 16-bit reads anytime we are transferring an even number of bytes. If the code detects an odd number of bytes, it tries to perform the operation in two steps: once in 16-bit mode with an even number of bytes, and once in 8-bit mode for the final byte. This allow us to use 16-bit reads even if asked to transfer (for example) 0xf423 bytes. The limit on in_now and out_now is adjusted to 0xfffe to avoid an extra transfer when transferring ~>=64KB. CQ-DEPEND=CL:383232 BUG=chrome-os-partner:56556 BRANCH=none TEST=boot on gru and see that things still work correctly. I tested (with extra debugging) that the 16-bit case is being picked when it should be. Change-Id: If5effae9a84e4de06537fd594bedf7f01d6a9c88 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: ec250b4931c7d99cc014e32ab597fca948299d08 Original-Change-Id: Idc5b7e5d82cdbdc1e8fe8b2d6da819edf2d5570c Original-Signed-off-by: Simon Glass <sjg@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/381312 Original-Commit-Ready: Julius Werner <jwerner@chromium.org> Original-Tested-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/16712 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
2016-10-04rockchip: spi: Set rxd sample delay when using high speedSimon Glass
At higher SPI bus speeds the SPI RX value is not available in time for sampling at the normal time. Add a delay to ensure that we read the correct data. The value of 40ns is chosen arbitrarily. In my testing I can use a sample delay of 1 even at 24MHz. But since it is not necessary, I have left that case alone. It kicks in at 25MHz and up. BUG=chrome-os-partner:56556 BRANCH=none TEST=boot on gru and see no change at current speed Change-Id: I3ef335d9a532eaef1e76034bd02e185acf11176a Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: e9b620c47fc3e39211487507fadb8657afdebee7 Original-Change-Id: I65d66d752cbbbee4d02f475de23a52069a0e9782 Original-Signed-off-by: Simon Glass <sjg@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/381311 Original-Commit-Ready: Julius Werner <jwerner@chromium.org> Original-Tested-by: Simon Glass <sjg@google.com> Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/16707 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2016-09-20rockchip: spi: Improve SPI read efficiencySimon Glass
The SPI driver is quite slow at reading data. For example, with a 24MHz clock on gru it achieves a read speed of only 13.9Mbps. We can correct this by reading the status registers once, then reading as many bytes as are available before checking the status registers again. It seems likely that a status register read requires synchronizing with the SPI FIFO clock domain, which takes a while. BUG=chrome-os-partner:56556 BRANCH=none TEST=run on gru and see the speed increase from 13.920 Mbps to 24.712 Mbps Change-Id: I24aed0c9c6c5445634c4e056922afaee4e9a7b33 Signed-off-by: Martin Roth <martinroth@chromium.org> Original-Commit-Id: 49c2fc20d7d7d703763e9b0a6f68313a349a84b9 Original-Change-Id: I42745f01f0fe069f6ae26d866004d36bb257e6b2 Original-Signed-off-by: Simon Glass <sjg@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/376945 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/16582 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2016-05-09rockchip/spi: Allow SPI buses > 2Patrick Georgi
If SPI_BASEx is defined (for 2 < x <= 5), allow selecting it. Since the bus number translates into an offset into an array, require that all earlier buses are defined, too. Also assert() that the array is properly sized instead of blindly exceeding its bounds when called with a too big bus number. TEST=initializing bus 5 doesn't trap anymore on kevin BRANCH=none BUG=none Change-Id: I69f8ebe10854976608197a13d223ee8a555a9545 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: c4af2a4ad4d6eea551653ca300ea6d04f1280919 Original-Change-Id: I27724d64d822ed0ec824a69ed611140bfbe08f5a Original-Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Original-Reviewed-on: https://chromium-review.googlesource.com/341034 Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org> Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org> Reviewed-on: https://review.coreboot.org/14723 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2016-04-13rockchip/common: do not retrieve register pointer twiceVadim Bendebury
The driver interface function derives the driver specific pointer from the API provided handle, no need to use the handle in the local functions. BRANCH=none BUG=none TEST=SPI interface with the flash ROM is still working properly. Change-Id: I7725b658365473c733698ca050e780d1dd5072d9 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: a2b42779785623bd1234ab2dfb0b4db76c890fc7 Original-Change-Id: I9d657dc23540e9eac52d2dbfc551ed32b7fa98f0 Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/338090 Original-Reviewed-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: https://review.coreboot.org/14318 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
2016-04-07rockchip: refactor to sharing code among similar SOCsVadim Bendebury
Upcoming designs are based on similar SOCs, this patch moves code which can be reused into a common directory under soc/rockchip. Changing spi.h to include stdder.h, as this is were check_member() is defined, this becomes necessary later when the new SOC code is added. Renaming UART driver private functions not to be bound to any particular SOC. BUG=none BRANCH=none TEST=the refactored code works fine on the new platform (with the rest of the patches applied). Change-Id: I39a505aecda8849daa58a8eca0e44a5243664423 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: f63f2582042ac115481207ddf329ea2e3260e55e Original-Change-Id: I3a1139305354d460492b25a45f3da315a9a0b49e Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/335408 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: https://review.coreboot.org/14235 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
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