On 2/23/22 17:28, Dinh Nguyen wrote:
On 2/22/22 18:54, Marek Vasut wrote:
On 2/22/22 22:32, Dinh Nguyen wrote:
On 2/22/22 12:30, Marek Vasut wrote:
On 2/22/22 16:49, Dinh Nguyen wrote:
On 2/21/22 11:05, Marek Vasut wrote:
On 2/21/22 17:38, Dinh Nguyen wrote:
On 2/20/22 22:32, Marek Vasut wrote:
On SoCFPGA Gen5, DAC memcpy_fromio() in cqspi_direct_read_execute()
leads to data abort, disable DAC to avoid triggering it:
Unhandled fault: imprecise external abort (0x1406) at 0x0400d3e9
[0400d3e9] *pgd=00000000
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Cc: Pratyush Yadav <p.yadav@xxxxxx>
---
drivers/spi/spi-cadence-quadspi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/spi-cadence-quadspi.c
b/drivers/spi/spi-cadence-quadspi.c
index b808c94641fa6..65f2c2449be09 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1870,7 +1870,7 @@ static const struct cqspi_driver_platdata
intel_lgm_qspi = {
};
static const struct cqspi_driver_platdata socfpga_qspi = {
- .quirks = CQSPI_NO_SUPPORT_WR_COMPLETION,
+ .quirks = CQSPI_DISABLE_DAC_MODE |
CQSPI_NO_SUPPORT_WR_COMPLETION,
};
static const struct cqspi_driver_platdata versal_ospi = {
Acked-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Is this DAC really not working on socfpga gen5 or is there some
other issue ?
I don't know the answer to this question. What is the DAC in the
QSPI module and how do I go about testing it?
DAC = direct access.
How do you go about testing this -- compile kernel with/without this
patch, boot on SoCFPGA Gen5 with QSPI NOR attached, the kernel
crashes without this patch on imprecise external abort.
Hmm...I just tested v5.17-rc3 on a C5 board and QSPI looks to be
working fine:
[ 1.744489] spi-nor spi1.0: found n25q512ax3, expected mt25qu02g
[ 1.750534] dma-pl330 ffe01000.pdma: Reset Channel-0 CS-f FTC-40000
[ 1.756941] spi-nor spi1.0: n25q512ax3 (65536 Kbytes)
[ 1.762369] 2 fixed-partitions partitions found on MTD device
ff705000.spi.0
[ 1.769425] Creating 2 MTD partitions on "ff705000.spi.0":
[ 1.774925] 0x000000000000-0x000000800000 : "Flash 0 Raw Data"
[ 1.781942] 0x000000800000-0x000008000000 : "Flash 0 jffs2
Filesystem"
[ 1.788468] mtd: partition "Flash 0 jffs2 Filesystem" extends
beyond the end of device "ff705000.spi.0" -- size truncated to 0x3800000
I wonder if we might be missing some clock enable somewhere.
Can you mail me the whole boot log ? (I'm using u-boot 2022.01 btw.)
I tested with U-Boot 2022.01 as well:
=> run nfsboot_dinh
Kernel image @ 0x1000000 [ 0x000000 - 0x54edd0 ]
## Flattened Device Tree blob at 02000000
Booting using the fdt blob at 0x2000000
Loading Device Tree to 09ff8000, end 09fffeb1 ... OK
Starting kernel ...
Deasserting all peripheral resets
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.17.0-rc3 (dinguyen@linux-builds1)
(arm-linux-gnue abihf-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0,
GNU ld (GNU Binutils for U buntu) 2.30) #1 SMP Wed Feb 23 08:51:18 CST 2022
[ 0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7),
cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instructio n cache
[ 0.000000] OF: fdt: Machine model: Altera SOCFPGA Cyclone V SoC
Development Kit
[ 0.000000] Memory policy: Data cache writealloc
This is weird.
One more thing, I have two SPI NORs on this CQSPI, one on each chip
select, do you think that can make any difference ?
Besides that, I used latest next for my tests, not latest linus tree.
Maybe I should try and find the CV devkit too and test on that.
