Commit Graph

18845 Commits

Author SHA1 Message Date
Moti Buskila
69f084f5c6 ddr: marvell: a38x: fix write leveling suplementary algo
commit ce62bef8fac559e27245259882e45f19cdc293ad upstream.

- fix JIRA A7K8K-5056
- remove TEST_PATTERN write at the load patern stage earlier to WL SUP stage
- the WL SUP stage already writes this pattern to the memory, if the pattern exist at the memory
  then the algorithm will fail, since it think that there are no phase to correct

Signed-off-by: Moti Buskila <motib@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
2021-02-26 10:22:29 +01:00
Marek Behún
5ddfd3f441 pci: pci_mvebu: set local dev to number 1
Linux displays the real PCIe card connected to a mvebu PCIe slot as
device 0, not 1. This is done by setting local dev number to 1, so that
the local "Marvell Memory controller" device is on address 1.

Let's do it also in U-Boot.

With this commit the pci command in U-Boot prints something like:
  => pci
  Scanning PCI devices on bus 0
  BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
  _____________________________________________________________
  00.00.00   0x168c     0x003c     Network controller      0x80

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Stefan Roese <sr@denx.de>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Marek Behún
10eb2cc344 pci: pci_mvebu: refactor validation of addresses for config access
Refactor validation of bdf parameter in mvebu_pcie_read/write_config
functions.

We can simplify the code by putting the validation into separate
function.

Also there are always only two devices visible on local bus:
* on slot configured by function mvebu_pcie_set_local_dev_nr()
  (by default this register is set to 0) there is a
  "Marvell Memory controller", which isn't useful in root complex
  mode,
* on all other slots the real PCIe card connected to the PCIe slot.

We can simplify the code even more by simply allowing access only to
the real PCIe card.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Stefan Roese <sr@denx.de>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Marek Behún
26f7a76ef9 pci: pci_mvebu: debug rd/wr config as other drivers do
Other drivers (aardvark, intel_fpga) print "(addr,size,val)" when
debugging is enabled. Print size for pci_mvebu as well.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Stefan Roese <sr@denx.de>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Marek Behún
241d763618 pci: pci_mvebu: cosmetic fix
Write bdf address in a same way in mvebu_pcie_read/write_config.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Stefan Roese <sr@denx.de>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Marek Behún
201958af10 pci: pci_mvebu: use dev_seq instead of static variable
PCI uclass maps PCI bus numbers to the seq member of struct udevice.
Use dev_seq(dev) as the bus number in mvebu_pcie_probe instead of an
incrementing a static variable.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Stefan Roese <sr@denx.de>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Pali Rohár
cba6edd68b arm: a37xx: pci: Set Max Payload Size and Max Read Request Size to 512 bytes
Fix usage of VL805 XHCI PCIe controller when it is connected via PCIe to
Armada 3720 SOC. Without this U-Boot crashes when trying to access
enumerated USB devices connected to this XHCI PCIe controller.

This should be done according to the PCIe Link Initialization sequence, as
defined in Marvell Armada 3720 Functional Specification.

Linux has this code too.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-02-26 10:22:29 +01:00
Heinrich Schuchardt
df88a0e5cd net: cortina_ni: buffer overrun
When copying to a u32 field we should use sizeof(u32) and not
sizeof(*u32) in memcpy.

On 64bit systems like cortina_presidio-asic-emmc_defconfig using
sizeof(*u32) leads to a buffer overrun.

Fixes: febe13b438 ("net: cortina_ni: Add eth support for Cortina Access CAxxxx SoCs")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-By: Ramon Fried <rfried.dev@gmail.com>
2021-02-24 16:51:49 -05:00
Heinrich Schuchardt
6b0431dc21 mtd: rawnand: cortina_nand: missing initialization
ca_do_bch_correction() takes a random value from the stack and starts
counting bitflips from this value. Initialize the counter.

This passed unnoticed as the value is finally ignored in the call
hierarchy.

Fixes: 161df94b3c ("mtd: rawnand: cortina_nand: Add Cortina CAxxxx SoC support")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-02-24 16:51:49 -05:00
Heinrich Schuchardt
f0bbcdef1b dm: ddr: socfpga: don't assign values that are not used
The values of left_edge[0] and right_edge[0] are overwritten before they
are used. Remove the superfluous assignments.

Fixes: 285b3cb939 ("dm: ddr: socfpga: fix gen5 ddr driver to not use bss")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-24 16:51:49 -05:00
Peter Robinson
391a16b710 rng: iProc rng200: Rename ..._platdata variables to just ..._plat
In 8a8d24bd Simon dropped data from all the various _platdata calls
but it seems this wasn't caught for the RNG200 driver from when it
was posted to merged. This fixes that issue.

Fixes: 537f0018 (rng: Add iProc RNG200 driver)
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
2021-02-24 16:51:49 -05:00
Vincent Stehlé
25d34b936c virtio: fix off by one device id comparison
VIRTIO_ID_MAX_NUM is the largest device ID plus 1. Therefore a device id
cannot be greater or equal to VIRTIO_ID_MAX_NUM. Fix the comparison
accordingly.

Fixes: 8fb49b4c7a ("dm: Add a new uclass driver for VirtIO transport devices")
Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
2021-02-24 16:51:48 -05:00
Tom Rini
cbe607b920 Merge tag 'xilinx-for-v2021.04-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-microblaze
Xilinx changes for v2021.04-rc3

qspi:
- Support for dual/quad mode
- Fix speed handling

clk:
- Add clock enable function for zynq/zynqmp/versal

gem:
- Enable clock for Versal
- Fix error path
- Fix mdio deregistration path

fpga:
- Fix buffer alignment for ZynqMP

xilinx:
- Fix reset reason clearing in ZynqMP
- Show silicon version in SPL for Zynq/ZynqMP
- Fix DTB selection for ZynqMP
- Rename zc1275 to zcu1275 to match DT name
2021-02-23 10:45:55 -05:00
Brandon Maier
d9aa19efa8 spi: zynqmp_gqspi: fix set_speed bug on multiple runs
If zynqmp_qspi_set_speed() is called multiple times with the same speed,
then on the second call it will skip recalculating the baud_rate_val as
it assumes the speed is already configured correctly. But it will still
write the baud_rate_val to the configuration register and call
zynqmp_gqspi_set_tapdelay(). Because it skipped recalculating the
baud_rate_val, it will use the initial value of 0 . This causes the
driver to run at maximum speed which for many spi flashes is too fast and
causes data corruption.

Instead only write out a new baud_rate_val if we have calculated the
correct baud_rate_val.

This opens up another issue with the "if (speed == 0)", we don't save
off the new plat->speed_hz value when setting the baud rate on the
speed=0 path. Instead mimic what the Linux zynqmp gqspi driver does, and
have speed==0 just use the same calculation as a normal speed. That will
cause the baud_rate_val to use the slowest speed possible, which is the
safest option.

Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
CC: jagan@amarulasolutions.com
CC: michal.simek@xilinx.com
CC: Ashok Reddy Soma <ashokred@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:59 +01:00
Michal Simek
a13a82186e net: gem: Fix error path in zynq_gem_probe
Clean up error path in connection where priv->rxbuffers and priv->tx_bd are
allocated.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:59 +01:00
T Karthik Reddy
ea4d4cb39a net: gem: Enable ethernet rx clock for versal
Enable rx clock along with tx clock for versal platform. Use compatible
data to enable/disable clocks in the driver.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2021-02-23 14:56:59 +01:00
T Karthik Reddy
8faa7913a4 i2c: i2c_cdns: Enable i2c clock
Enable i2c controller clock from driver probe function
by calling clk_enable().

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-02-23 14:56:59 +01:00
T Karthik Reddy
60b03f1cc4 clk: versal: Add support to enable clocks
Add clock enable functionality in versal clock driver to enable
clocks from peripheral drivers using clk_ops.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:59 +01:00
T Karthik Reddy
a72a6ae362 clk: zynqmp: Add support to enable clocks
Add clock enable functionality in zynqmp clock driver to enable
clocks from peripheral drivers using clk_ops.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:59 +01:00
Michal Simek
9b7aac7536 clk: zynq: Add dummy clock enable function
A lot of Xilinx drivers are checking -ENOSYS which means that clock driver
doesn't have enable function. Remove this checking from drivers and create
dummy enable function as was done for clk_fixed_rate driver by
commit 6bf6d81c11 ("clk: fixed_rate: add dummy enable() function").

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:59 +01:00
Michael Walle
8c02d842b6 fpga: zynqpl: fix buffer alignment
Due to pointer arithmetic, "sizeof(u32) * ARCH_DMA_MINALIGN" is
subtracted. It seems that the original intention was to just subtract
ARCH_DMA_MINALIGN. Fix it.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2021-02-23 14:56:55 +01:00
Tom Rini
8f7a16aac3 Merge tag 'u-boot-amlogic-20210222' of https://gitlab.denx.de/u-boot/custodians/u-boot-amlogic
- adds adc-keys button driver
- fix meson-saradc driver to get reference voltage
- add adc-keys test for sandbox
- enable adc-keys for VIM3 & VIM3L boards
- fix button.h build
2021-02-22 12:37:02 -05:00
Tom Rini
bced796e2d Merge tag 'ti-v2021.04-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-ti
- Fix ethernet on J721e
- Sync am335x DT nodes from Linux 5.9-rc7
- Minor Clock fixes
2021-02-22 09:12:04 -05:00
Tom Rini
a3ddc776fa Merge tag 'video-for-v2021.04-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-video
- splash_source warning fix when building with 64-bit toolchains
 - lq123p1jx31 and nv101wxmn51 compatible in simple panel driver
 - remove not used mb862xx driver
 - add Himax HX8238D panel driver
 - s/video_uc_platdata/video_uc_plat/
2021-02-22 09:11:27 -05:00
Dario Binacchi
d242a14533 clk: ti: improve debug messages for clkctrl driver
The previous version printed the same debug message for both the enable
and disable routines without highlighting whether you were enabling or
disabling the module. It is now clear whether you are enabling or
disabling the module.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
2021-02-22 11:39:48 +05:30
Rasmus Villemoes
44a7cc82b3 uec.h: fix COFIG_DM typo
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-02-21 18:46:41 -05:00
Rasmus Villemoes
69bd7dfc3a dm_qe_uec.c: fix indentation in uec_set_mac_if_mode()
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-02-21 18:46:41 -05:00
Tom Rini
b732c8780c Merge tag 'for-v2021.04' of https://gitlab.denx.de/u-boot/custodians/u-boot-i2c
i2c changes for v2021.04

new feature:
- Allow disabling driver model for I2C in SPL

fixes:
- i2c-gpio: Fix GPIO output
- at91: fix crash when using 'i2c probe'
2021-02-21 11:17:07 -05:00
Igor Opaniuk
2147a16983 dm: i2c: use CONFIG_IS_ENABLED macro for DM_I2C/DM_I2C_GPIO
Use CONFIG_IS_ENABLED() macro, which provides more convenient
way to check $(SPL)DM_I2C/$(SPL)DM_I2C_GPIO configs
for both SPL and U-Boot proper.

CONFIG_IS_ENABLED(DM_I2C) expands to:
- 1 if CONFIG_SPL_BUILD is undefined and CONFIG_DM_I2C is set to 'y',
- 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_DM_I2C is set to 'y',
- 0 otherwise.

All occurences were replaced automatically using these bash cmds:
$ find . -type f -exec sed -i
     's/ifndef CONFIG_DM_I2C/if !CONFIG_IS_ENABLED(DM_I2C)/g' {} +
$ find . -type f -exec sed -i
    's/ifdef CONFIG_DM_I2C/if CONFIG_IS_ENABLED(DM_I2C)/g' {} +
$ find . -type f -exec sed -i
    's/defined(CONFIG_DM_I2C)/CONFIG_IS_ENABLED(DM_I2C)/g' {} +
$ find . -type f -exec sed -i
    's/ifndef CONFIG_DM_I2C_GPIO/if !CONFIG_IS_ENABLED(DM_I2C_GPIO)/g' {} +
$ find . -type f -exec sed -i
    's/ifdef CONFIG_DM_I2C_GPIO/if CONFIG_IS_ENABLED(DM_I2C_GPIO)/g' {} +
$ find . -type f -exec sed -i
    's/defined(CONFIG_DM_I2C_GPIO)/CONFIG_IS_ENABLED(DM_I2C_GPIO)/g' {} +

Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
2021-02-21 06:08:00 +01:00
Igor Opaniuk
d1f3abe1e7 dm: i2c: allow disabling driver model in SPL
At present if U-Boot proper uses driver model for I2C, then SPL has to
also. While this is desirable, it places a significant barrier to moving
to driver model in some cases. For example, with a space-constrained SPL
it may be necessary to enable CONFIG_SPL_OF_PLATDATA which involves
adjusting some drivers.

This patch introduces a separate Kconfig symbols for enabling DM_I2C and
DM_I2C_GPIO support in SPL.

This will also help to get away from dirty workarounds to
achieve non-DM I2C support for SPL, which is currently used in some
board header files like:

ifdef CONFIG_SPL_BUILD
undef CONFIG_DM_I2C
endif

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
Reviewed-by: Tom Rini <trini@konsulko.com>
2021-02-21 06:07:30 +01:00
Eugen Hristev
73c16692bc i2c: at91: fix crash when using 'i2c probe'
When issuing 'i2c probe', the driver was crashing, because at probe
there is a request with zero length buffer to write to i2c bus.
The xfer_msg function assumes the buffer is always there, and never
checks for the buffer length.

=> i2c dev 0
Setting bus to 0
=> i2c probe
Valid chip addresses:
data abort
pc : [<7ffa97dc>]          lr : [<7ffa96f8>]
reloc pc : [<66f277dc>]    lr : [<66f276f8>]
sp : 7fb7c110  ip : 7ff87a28     fp : 7ff99938
r10: 00000002  r9 : 7fb7dec0     r8 : 00000000
r7 : e181c600  r6 : 7fb88c20     r5 : 00000000  r4 : 7fb7c128
r3 : 00000000  r2 : 00000001     r1 : 00000000  r0 : 00000009
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
Code: eb0092f4 e1a00005 e8bd81f0 e594300c (e5d33000)
Resetting CPU ...

Fixes: 8800e0fa20 ("i2c: atmel: add i2c driver")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2021-02-21 06:05:08 +01:00
Harm Berntsen
6befb51f34 i2c: i2c-gpio: Fix GPIO output
The dm_gpio_set_dir_flags function cannot be used to update the
configuration of a GPIO pin because it does a bitwise OR with the
existing flags. Looks like commit 788ea83412 ("gpio: add function
_dm_gpio_set_dir_flags") has introduced this behaviour and the i2c-gpio
driver has been broken since.

Signed-off-by: Harm Berntsen <harm.berntsen@nedap.com>
CC: Heiko Schocher <hs@denx.de>
CC: Patrick Delaunay <patrick.delaunay@st.com>
2021-02-21 06:04:49 +01:00
Marek Vasut
06183ac5f5 pci: renesas: Fix BAR mapping on Gen3
Because the first PCIExAR(n) register is configured with the mapping,
It is the second PCIExAR(n) register that must be written with 0, not
the last one. Update the n from 4 to 1 to select the correct register.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2021-02-20 22:38:28 +01:00
Marek Vasut
b169ef1798 pci: renesas: Make map address and mask power of two on Gen3
Both the map address and mask must be power of two per documentation,
adjust the code accordingly.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2021-02-20 22:38:28 +01:00
Marek Vasut
b9616d8f90 pci: renesas: Add root bus handling on Gen3
Add code to access the PCIe root bus space and configure it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2021-02-20 22:38:28 +01:00
Moses Christopher
0f425612c8 drivers: video: Add Support for Himax HX8238D Panel
* SPI based initialization for HX8238D
* Resolution: 320x240
* Color-Mode: RGB

* Initial Work is done by Sjoerd Simons
  https://gitlab.apertis.org/packaging/u-boot/-/blob\
  /5f259720e3e64965d50da89a841ad6eb256a47df/debian/patches\
  /apertis/powertools/0005-video-Add-Himax-HX8238-D-driver.patch

* Tested on Bosch Guardian Board

Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Moses Christopher <BollavarapuMoses.Christopher@in.bosch.com>
2021-02-19 23:38:06 +01:00
Dario Binacchi
196947b103 Replace video_uc_platdata with video_uc_plat
The video_uc_platdata structure no longer exists. It has been renamed
video_uc_plat.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
2021-02-19 22:45:47 +01:00
Heinrich Schuchardt
9c1e098fb9 video: eliminate unused drivers/video/mb862xx.c
The mb862xx driver does not conform to the driver model and is unused.
Eliminate it.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 22:35:49 +01:00
Alper Nebi Yasak
f457680ffb video: simple_panel: Add boe,nv101wxmn51 display
Add "boe,nv101wxmn51" to the compatible node. This is the panel for
chromebook_bob.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 22:26:57 +01:00
Alper Nebi Yasak
92a8143c17 video: simple_panel: Add sharp,lq123p1jx31 display
Add "sharp,lq123p1jx31" to the compatible node. This is the panel for
chromebook_kevin.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 22:26:39 +01:00
Jaehoon Chung
9d7e6611a0 mmc: rockchip_dw_mmc: use mmc_pwrseq instead of rockchip_mmc_pwrseq
Use mmc_pwrseq instead of rockchip_mmc_pwrseq.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:11:08 +08:00
Jaehoon Chung
a96ea4d8d5 mmc: meson_gx_mmc: use mmc_pwrseq instead of meson_mmc_pwrseq
Use mmc_pwrseq instead of meson_mmc_pwrseq.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
2021-02-19 15:10:46 +08:00
Jaehoon Chung
caee38aef7 mmc: pwrseq: add mmc-pwrseq file to provide a generic interface
Add mmc-pwrseq file to provide a generic interface.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:10:41 +08:00
Bin Meng
46938abd2c mmc: mmc_spi: Document the 3 local functions
mmc_spi_sendcmd(), mmc_spi_readdata() and mmc_spi_writedata() are
currently undocumented. Add comment blocks to explain the arguments
and the return value.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:08:03 +08:00
Bin Meng
2f22cb40e5 mmc: mmc_spi: Fix potential spec violation in receiving card response
After command is sent and before card response shows up on the line,
there is a variable number of clock cycles in between called Ncr.
The spec [1] says the minimum is 1 byte and the maximum is 8 bytes.

Current logic in mmc_spi_sendcmd() has a flaw that it could only work
with certain SD cards with their Ncr being just 1 byte.

When resp_match is false, the codes try to receive only 1 byte from
the SD card. On the other hand when resp_match is true, the logic
happens to be no problem as it loops until timeout to receive as many
bytes as possible to see a match of the expected resp_match_value.
However not every call to mmc_spi_sendcmd() is made with resp_match
being true hence this exposes a potential issue with SD cards that
have a larger Ncr value.

Given no issue was reported as of today, we can reasonably conclude
that all cards being used on the supported boards happen to have a 1
byte Ncr timing requirement. But a broken case can be triggered by
utilizing QEMU to emulate a larger value of Ncr (by default 1 byte
Ncr is used on QEMU). This commit fixes such potential spec violation
to improve the card compatibility.

[1] "Physical Layer Specification Version 8.00"
     chapter 7.5.1: Command / Response
     chapter 7.5.4: Timing Values

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:07:53 +08:00
Bin Meng
781aad0de9 mmc: mmc_spi: Move argument check to the beginning of mmc_spi_sendcmd()
The argument check should happen before any transfer on the SPI lines.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:07:30 +08:00
Bin Meng
01962f8d7c mmc: mmc_spi: Print verbose debug output when crc16 check fails
Add some verbose debug output when crc16 check fails.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:06:53 +08:00
Stefan Bosch
8e2b0af721 mmc: fix response timeout after switch command
After issuing the switch command: Wait until 'current state' of the card
status becomes 'tran'. This prevents from response timeout at the next
command because of 'current state' = 'data'.

Signed-off-by: Stefan Bosch <stefan_b@posteo.net>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-02-19 15:04:15 +08:00
Yuezhang.Mo@sony.com
37e1362efc mmc: sdhci: skip cache invalidation if DMA is not used
If DMA(SDMA or ADMA) is not used, the cache invalidation
after reading is no need, should be skipped. Otherwise
U-Boot may hang at the cache invalidation.

Found this issue and tested this fix on DragonBoard 410c.

Fixes: commit 4155ad9aac ("mmc: sdhci: fix missing cache invalidation after reading by DMA")

Signed-off-by: Yuezhang.Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
2021-02-19 15:03:25 +08:00
Jaehoon Chung
52ff04a216 mmc: initialize an err variable
Initialize an err variable to 0.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reported-by: Coverity (CID: 313548)
Reviewed-by: Tom Rini <trini@konsulko.com>
2021-02-19 14:59:28 +08:00