| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
Since the beginning of this driver which was initially for the MPC8379
and MPC8536 SoCs, there is this spurious 1ms delay. According to the
comment it should actually be only 8 clock cycles. Esp. during EFI block
transfers, this 1ms add up to a significant delay and slows down EFI
boot.
I couldn't find any mention in the MPC8536 that there should be a delay
of 8 clock cycles between commands. The SD card specification mentions that
the clock has to be left enabled for 8 cycles after a command or
response. But I don't see how this delay will help with this.
Go ahead and just remove it. If there will ever be any regression we can
introduce a compile time flag, but for now I'd like to keep it simple.
In the split off imx driver this delay was also removed in commit
9098682200e6 ("mmc: fsl_esdhc_imx: remove the 1ms delay before sending
command").
Signed-off-by: Michael Walle <michael@walle.cc>
|
|
HS400_ES is missed when down grade to HS mode during
device_remove the mmc device
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
When send_status is false or wait_dat0 is not supported, the switch
function should not send CMD13 but directly return.
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Add support for enumerating MMC card in a given mode using mmc rescan and
mmc dev commands. The speed mode is provided as the last argument in these
commands and is indicated using the index from enum bus_mode in
include/mmc.h. A speed mode can be set only if it has already been enabled
in the device tree.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
This reverts commit 17ea3c862865c0d704646f67dbf8412f9ff54f59.
In eMMC specification, for the response-with-busy(R1b, R5b)
command, the DAT0 will driven to LOW as BUSY status, and in
sdhci specification, the transfer complete bit should be wait
for BUSY status de-assert.
All response-with-busy commands don't contain data, the data
judgement is no need.
Signed-off-by: Yuezhang.Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
https://gitlab.denx.de/u-boot/custodians/u-boot-microblaze
Xilinx changes for v2021.10-rc3
xilinx:
- Disable CONFIG_ARCH_FIXUP_FDT_MEMORY
- Print information about cpu via soc drivers and enable DISPLAY_CPUINFO
- Wire infrastructure for DTB_RESELECT and MULTI_DTB_FIT
zynq:
- Wire single QSPI
- Use power-source instead of io-standard properties
- Enable nor on zc770-xm012
zynqmp:
- Change handling around multi_boot()
- Setup offset for u-boot.itb in spi
- Generate run time dfu_alt_info for capsule update
- Use explicit values for enums (zynqmp_firmware.h)
- Enable RTC/SHA1/BUTTON/BUTTON_GPIO command
- Disable WDT driver by default
- Bind usb/scsi via preboot because of EFI
- DT updates/fixes
- Add soc driver
- Fix SPL SPI boot mode
versal:
- Add soc driver
sdhci:
- Update tap delay programming for zynq_sdhci driver
cmd:
- Fix RTC uclass handling in date command
- Update pwm help message
- Update reset help message
watchdog:
- Fix wwdt compilation
rtc:
- Deal with seq alias in rtc uclass
- Add zynqmp RTC driver
fdt:
- Add kernel-doc for fdt_fixup_memory_banks()
|
|
Since set_control_reg is available in sdhci.c, use it and remove
arasan_sdhci_set_control_reg().
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
As per SD spec when SD host controller is reset, it takes 1000msec
to detect the card state. In case, if we enable the sd bus voltage &
card detect state is not stable, then host controller will disable
the sd bus voltage.
In case of warm/subsystem reboot, due to unstable card detect state
host controller is disabling the sd bus voltage to sd card causing
sd card timeout error. So we wait for a maximum of 1000msec to get
the card detect state stable before we enable the sd bus voltage.
This current fix is workaround for now, this needs to be analysed
further. Zynqmp platform should behave the same as Versal, but we
did not encounter this issue as of now. So we are fixing it for
Versal only.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
Move tapdelay function calls to zynq_sdhci.c and make them static
inline. zynqmp_tap_delay.h has function prototypes for the functions
defined in tap_delays.c, which will not be needed anymore.
Remove tap_delays.c and zynqmp_tap_delay.h files.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Currently xilinx sdhci driver is using zynqmp_mmio_write() to set
tapdelay values and DLL resets. Continue to use this for SPL and mini
U-Boot where U-Boot will be executed at EL3 level.
Use firmware call xilinx_pm_request() using appropriate arguments to
set input/output tapdelays and also for DLL resets in regular flow(EL2).
Host driver should explicitly request DLL reset before ITAP (assert DLL)
and after OTAP (release DLL) to avoid issues in some cases. Also handle
error return where possible.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
This patch adds support for the RK3568 platform to this driver.
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
|
|
Add clock, phy and other configuration, it is convenient to support
new controller. Here a short summary of the changes:
- Add mmc_of_parse to parse dts config.
- Remove OF_PLATDATA related code.
- Reorder header inclusion.
- Add phy ops.
- add ops set_ios_post to modify the parameters of phy when the
clock changes.
- Add execute tuning api for hs200 tuning.
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
|
|
i.MX8ULP reuse same SDHC IP as i.MX8M, so follow i.MX8M code logic.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
|
|
set_delay() has return type as void. If there are any errors while
setting tapdelay's it won't be able to return them.
Change the prototype of set_delay() in sdhci_ops structure and return
the errors from wherever it is called.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
Change return type of arasan_sdhci_set_tapdelay() to int, to facilitate
returning errors. Get return values from input and output set clock phase
functions inside arasan_sdhci_set_tapdelay() and return those errors.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
For the eMMC on ST-Ericsson Ux500v2 we need slightly different
configuration values. Use the existing switch statement to match
the peripheral ID of Ux500v2 (0x10480180) and override the necessary
values to make the eMMC work on devices with ST-Ericsson Ux500.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> on stm32f769-disco
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Simplify the code a bit by using the common mmc_of_parse() function
instead of duplicating the device tree parsing code. We can still get
a default value for cfg->f_max by assigning it before calling
mmc_of_parse().
Another advantage of this refactoring is that we parse more properties
now, e.g. "non-removable" can be used to disable CD entirely.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> on stm32f769-disco
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Simplify the code a bit by using dev_read_addr_ptr() instead of
dev_read_addr(). This avoids having to cast explicitly to void*.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> on stm32f769-disco
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
The arm,primecell compatible is used for lots of different types
of devices, e.g. I2C, SPI, coresight, ... We really should not bind
the MMC driver to all of them.
Looking through the device trees in U-Boot there seems to be always
a second compatible string for the pl180 device, either arm,pl180
(already listed) or arm,pl18x. Add the "arm,pl18x" compatible to the
list but remove the generic "arm,primecell".
Note that on Linux these compatibles cannot be found in drivers
because AMBA/primecell devices are matched based on their peripheral ID
instead of the compatible.
This fixes the following error messages when booting the ST-Ericsson
U8500 "stemmy" board with the arm_pl180_mmci driver enabled:
MMC: ptm@801ae000 - probe failed: -38
ptm@801af000 - probe failed: -38
funnel@801a6000 - probe failed: -38
tpiu@80190000 - probe failed: -38
etb@801a4000 - probe failed: -38
Cc: Patrice Chotard <patrice.chotard@st.com>
Fixes: 6f41d1a17e20 ("mmc: arm_pl180_mmci: Sync compatible with kernel")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> on stm32f769-disco
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Fix mmc_rpmb_route_frames() implementation to comply with most MMC
drivers that expect some alignment of MMC data frames in memory.
When called from drivers/tee/optee/rpmb.c, the address passed is not
aligned properly. OP-TEE OS inserts a 6-byte header before a raw RPMB
frame which makes RPMB data buffer not 32bit aligned. To prevent breaking
ABI with OPTEE-OS RPC memrefs, allocate a temporary buffer to copy the
data into an aligned memory.
Many RPMB drivers implicitly expect 32bit alignment of the eMMC frame
including arm_pl180_mmci.c, sandbox_mmc.c and stm32_sdmmc2.c
Signed-off-by: Timothée Cercueil <timothee.cercueil@st.com>
Signed-off-by: Timothée Cercueil <litchi.pi@protonmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
https://source.denx.de/u-boot/custodians/u-boot-ti
- Add MMC High speed modes for AM64 and J7200
- Add Sierra/Torrent SERDES driver
- Minor clean-ups for R5F boot from SPL
|
|
Rename these options so that CONFIG_IS_ENABLED can be used with them.
Signed-off-by: Simon Glass <sjg@chromium.org>
|
|
Read the strobe select value from the device tree property ti,strobe-sel,
required for HS400 speed mode
Fixes: a20008eabd95 ("mmc: am654_sdhci: Add Support for configuring PHY in J721e")
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20210525093826.10390-2-a-govindraju@ti.com
|
|
Enable HS400 speed mode by writing to HOST_CONTROL2 register.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20210405144428.12159-1-a-govindraju@ti.com
|
|
All these variables/structure are local and should be static.
Issues are reported by sparse:
drivers/mmc/zynq_sdhci.c:49:11: warning: symbol 'zynqmp_iclk_phases' was not declared. Should it be static?
drivers/mmc/zynq_sdhci.c:50:11: warning: symbol 'zynqmp_oclk_phases' was not declared. Should it be static?
drivers/mmc/zynq_sdhci.c:53:11: warning: symbol 'versal_iclk_phases' was not declared. Should it be static?
drivers/mmc/zynq_sdhci.c:54:11: warning: symbol 'versal_oclk_phases' was not declared. Should it be static?
drivers/mmc/zynq_sdhci.c:546:24: warning: symbol 'arasan_ops' was not declared. Should it be static?
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Fix these kernel doc warnings:
drivers/mmc/zynq_sdhci.c:181: warning: contents before sections
drivers/mmc/zynq_sdhci.c:236: warning: contents before sections
drivers/mmc/zynq_sdhci.c:291: warning: contents before sections
drivers/mmc/zynq_sdhci.c:297: warning: Function parameter or member 'degrees' not described in 'sdhci_versal_sdcardclk_set_phase'
drivers/mmc/zynq_sdhci.c:354: warning: contents before sections
drivers/mmc/zynq_sdhci.c:360: warning: Function parameter or member 'degrees' not described in 'sdhci_versal_sampleclk_set_phase'
drivers/mmc/zynq_sdhci.c:467: warning: contents before sections
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Split arasan_zynqmp_set_tapdelay() to handle input and output tapdelays
separately. This is required to handle zero values for ITAP and OTAP
values. If we dont split, we will have to remove the if() in the
function, which makes ITAP values to be overwritten when OTAP values are
called to set and vice-versa.
Restrict tap_delay value calculated to max allowed 8 bits for ITAP and 6
bits for OTAP for ZynqMP.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
Restrict tap_delay value to the allowed size(8bits for itap and 6 bits
for otap) before writing to the tap delay register.
Clear ITAP and OTAP delay bits before updating with the new tap value
for Versal platform.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
Allow configuring ITAP and OTAP values with zero to avoid failures in
some cases (one of them is SD boot mode). Legacy, SDR12 modes require
to program the ITAP and OTAP values as zero, whereas for SDR50 and SDR104
modes ITAP value is zero.
In SD boot mode firmware configures the SD ITAP and OTAP values and
in this case u-boot has to re-configure required tap values(including zero)
based on the operating mode.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
set_phase() functions are not modifying the ret value and returning
the same uninitialized ret, return 0 instead.
Keep the return type as int to return errors when the tapdelay's are
set via xilinx_pm_request() in future.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
|
|
Add support for reading devicetree flags for MMC devices. With this we
can distinguish between fixed and removable drives. Note that this
information is only available when the device is probed, not when it is
bound, since it is read in the of_to_plat() method. This could be changed
if needed later.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Add a new 'quiet' argument to mmc_get_op_cond() function which avoids
printing error message when SD/eMMC card is not detected.
Espressobin and mx6cuboxi boards use this function for detecting presence
of eMMC and therefore it is expected and normal that eMMC does not have to
be connected. So error message "Card did not respond to voltage select!"
should be skipped in this case as it is not an error.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
At the moment the Allwinner MMC driver parses the bus-width and
non-removable DT properties itself, in the probe() routine.
There is actually a generic function provided by the MMC framework doing
this job, also it parses more generic properties like broken-cd and
advanced transfer modes.
Drop our own code and call mmc_of_parse() instead, to get all new
features for free.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
To avoid the complexity of DMA operations (with chained descriptors), we
use repeated MMIO reads and writes to the SD_FIFO_REG, which allows us
to drain or fill the MMC data buffer FIFO very easily.
However those MMIO accesses are somewhat costly, so this limits our MMC
performance, to between 17 and 22 MB/s, but down to 9.5 MB/s on the H6
(partly due to the lower AHB1 frequency).
As it turns out we read the FIFO status register after *every* word we
read or write, which effectively doubles the number of MMIO accesses,
thus effectively more than halving our performance.
To avoid this overhead, we can make use of the FIFO level bits, which are
in the very same FIFO status registers.
So for a read request, we now can collect as many words as the FIFO
level originally indicated, and only then need to update the status
register.
We don't know for sure the size of the FIFO (and it seems to differ
across SoCs anyway), so writing is more fragile, which is why we still
use the old method for that. If we find a minimum FIFO size available on
all SoCs, we could use that, in a later optimisation.
This patch increases the eMMC read speed on a Pine64-LTS from about
22MB/s to 44 MB/s. SD card reads don't gain that much, but with 23 MB/s
we now reach the practical limit for 3.3V SD cards.
On the H6 we double our transfer speed, from 9.5 MB/s to 19.7 MB/s.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
|
|
Newer SoCs have a self calibration feature, which avoids us writing hard
coded phase delay values into the controller.
Consolidate the code by avoiding unnecessary #ifdefs, and also enabling
the feature for all those newer SoCs.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
|
|
Among the SoCs using the "new timing mode", only the A83T needs to
explicitly switch to that mode.
By just defining the symbol for that one odd A83T bit to 0 for any other
SoCs, we can always OR that in, and save the confusing nested #ifdefs.
Clean up the also confusing new_mode setting on the way.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Most Allwinner SoCs which use the so called "new timing mode" in their
MMC controllers actually use the double-rate PLL6/PERIPH0 clock as their
parent input clock. This is interestingly enough compensated by a hidden
"by 2" post-divider in the mod clock, so the divider and actual output
rate stay the same.
Even though for the H6 and H616 (but only for them!) we use the doubled
input clock for the divider computation, we never accounted for the
implicit post-divider, so the clock was only half the speed on those SoCs.
This didn't really matter so far, as our slow MMIO routine limits the
transfer speed anyway, but we will fix this soon.
Clean up the code around that selection, to always use the normal PLL6
(PERIPH0(1x)) clock as an input. As the rate and divider are the same,
that makes no difference.
Explain the hardware differences in a comment.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
|
|
When enabling PHYS_64BIT on 32-bit platforms, we get two warnings about
pointer casts in sunxi_mmc.c. Those are related to MMIO addresses, which
are always below 1GB on all Allwinner SoCs, so there is no problem with
anything having more than 32 bits.
Add the proper casts to make it compile cleanly.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
The delay and bus-width setup are slightly different across the
Allwinner SoC generations, and we covered this so far with some
preprocessor conditionals.
Use the more readable IS_ENABLE() instead.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
various minor sandbox improvements
|
|
- mpc8379erdb DM_USB, DM_PCI and DM_ETH support.
- Drop PCI support from the integrator family of boards
- Add synquacer support
- Assorted lpc32xx updates and improvements
- snapdragon (and related) fixes, Broadcom iproc update
|
|
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Define LOG_CATEGORY for all uclass to allow filtering with
log command.
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
|
|
This commit adds support to piton_mmc driver for OpenPiton-riscv64
This driver has many things set as preconfigured because the hardware
automatically configures most of the settings during startup.
Signed-off-by: Tianrui Wei <tianrui-wei@outlook.com>
Signed-off-by: Jonathan Balkind <jbalkind@ucsb.edu>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
clock output"
This reverts commit 63756575b42b8b4fb3f59cbbf0cedf03331bc2d2.
Since this commit a imx6qdl-pico board boots extremely slowly
in both SPL as well as U-Boot proper.
Fix this regression by reverting the offending commit for now.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Pierre-Jean Texier <texier.pj2@gmail.com>
|
|
Change to static about dm function.
They can be used with wrapper functions.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Use mmc_send_cmd instead of dm_mmc_send_cmd.
It doesn't need to distinguish this function.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
Add FIFO mode support for SoCFPGA dwmmc, read "fifo-mode" property from DT.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
The data read is not working when using FIFO mode.
From DesignWare databook, when a Data_Transfer_Over (DTO) interrupt is
received, the software should read the remaining data from FIFO.
Add DTO interrupt checking on data read path and clear interrupts before
start reading from FIFO. So, it doesn't clear the next pending
interrupts unintentionally after read from FIFO.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
|
|
With a 48MHz input clock, the lowest bus frequency can be as low as
48000000 / (4 * 4095) = 2930Hz. Such an extremely low frequency will cause
the mmc framework take seconds to finish the initialization.
Limiting the minimum bus frequency to a slightly higher value can solve the
issue without any side effects.
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
|
