[U-Boot] SPI flash on Altera socfpga
Hi!
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Best regards, Pavel
On Monday, April 20, 2015 at 10:36:09 AM, Pavel Machek wrote:
Hi!
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Which SPI flash are you talking about -- QSPI one or EPCS/EPCQ one ?
I think Stefan got the QSPI one working. EPCQ is a bit trickier.
Best regards, Marek Vasut
Hi Pavel,
On 20.04.2015 10:36, Pavel Machek wrote:
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
SPI NOR flash is working for me on SoCrates and another similar custom SOCFPGA based board just fine.
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Not that I know of. What are the problems that you experience?
Thanks, Stefan
Hi!
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Which SPI flash are you talking about -- QSPI one or EPCS/EPCQ one ?
I think Stefan got the QSPI one working. EPCQ is a bit trickier.
Datasheet mentions QSPI_IO*/CLK/SS* pins, so I assume it is QSPI.
On 20.04.2015 10:36, Pavel Machek wrote:
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
SPI NOR flash is working for me on SoCrates and another similar custom SOCFPGA based board just fine.
Thanks, that's useful to know.
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Not that I know of. What are the problems that you experience?
For tests, I've used config similar to socrates, even through the board should be more similar to socdk:
U-Boot 2015.04-rc4-00103-gef7e76c-dirty (Apr 20 2015 - 10:24:33)
CPU: Altera SoCFPGA Platform Watchdog enabled I2C: ready DRAM: 256 MiB MMC: SOCFPGA DWMMC: 0 Using default environment
In: serial Out: serial Err: serial Model: EBV SOCrates Net: dwmac.ff702000 Hit any key to stop autoboot: 0 => sf probe Invalid chip select 0:0 (err=-19) SF: Failed to set up slave Failed to initialize SPI flash at 0:0 =>
One thing that puzzles me:
./arch/arm/dts/socfpga_cyclone5_socrates.dts: flash0: n25q00@0 { ./arch/arm/dts/socfpga_cyclone5_socrates.dts: compatible = "n25q00";
..but I see no mention of that compatible string anywhere else. 2013-altera u-boot used ./drivers/mtd/spi/stmicro.c to handle it...
Best regards, Pavel
On 20.04.2015 11:24, Pavel Machek wrote:
Which SPI flash are you talking about -- QSPI one or EPCS/EPCQ one ?
I think Stefan got the QSPI one working. EPCQ is a bit trickier.
Datasheet mentions QSPI_IO*/CLK/SS* pins, so I assume it is QSPI.
Yes, QSPI handles the SPI NOR flash chips on SoCFPGA.
On 20.04.2015 10:36, Pavel Machek wrote:
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
SPI NOR flash is working for me on SoCrates and another similar custom SOCFPGA based board just fine.
Thanks, that's useful to know.
I tried to get the support to work on custom board, but was not successful so far. Does it work for you, or are still some parts missing?
Not that I know of. What are the problems that you experience?
For tests, I've used config similar to socrates, even through the board should be more similar to socdk:
U-Boot 2015.04-rc4-00103-gef7e76c-dirty (Apr 20 2015 - 10:24:33)
CPU: Altera SoCFPGA Platform Watchdog enabled I2C: ready DRAM: 256 MiB MMC: SOCFPGA DWMMC: 0 Using default environment
In: serial Out: serial Err: serial Model: EBV SOCrates Net: dwmac.ff702000 Hit any key to stop autoboot: 0 => sf probe Invalid chip select 0:0 (err=-19) SF: Failed to set up slave Failed to initialize SPI flash at 0:0 =>
IIRC, then the aliases in the dts are very important for this:
aliases { spi0 = "/spi@ff705000"; /* QSPI */ ...
Did you add those to your dts as well?
One thing that puzzles me:
./arch/arm/dts/socfpga_cyclone5_socrates.dts: flash0: n25q00@0 { ./arch/arm/dts/socfpga_cyclone5_socrates.dts: compatible = "n25q00";
..but I see no mention of that compatible string anywhere else. 2013-altera u-boot used ./drivers/mtd/spi/stmicro.c to handle it...
IIRC, the flash detection is done via autodetection by reading the parameters from the chip itself.
Thanks, Stefan
Hi!
IIRC, then the aliases in the dts are very important for this:
aliases { spi0 = "/spi@ff705000"; /* QSPI */ ...
Did you add those to your dts as well?
I was using socrates dts for the moment, to keep diffs small. Suddenly it started working.. and stopped working after reset. Now I realized what is going on:
=> sf probe Invalid chip select 0:0 (err=-19) SF: Failed to set up slave Failed to initialize SPI flash at 0:0 => sf probe 0 0 0 Invalid chip select 0:0 (err=-19) SF: Failed to set up slave Failed to initialize SPI flash at 0:0 => sspi QSPI: Error, command is empty. Error -1 during SPI transaction => sf probe 0 0 0 raise: Signal # 8 caught raise: Signal # 8 caught raise: Signal # 8 caught SF: Detected N25Q512 with page size 256 Bytes, erase size 4 KiB, total 64 MiB SF: Warning - Only lower 16MiB accessible, Full access #define CONFIG_SPI_FLASH_BAR =>
(u-boot 2015.04 final)
Is there missing initialization somewhere...?
Best regards, Pavel
Hi Pavel,
On 20.04.2015 11:43, Stefan Roese wrote:
On 20.04.2015 11:24, Pavel Machek wrote:
Which SPI flash are you talking about -- QSPI one or EPCS/EPCQ one ?
I think Stefan got the QSPI one working. EPCQ is a bit trickier.
Datasheet mentions QSPI_IO*/CLK/SS* pins, so I assume it is QSPI.
Yes, QSPI handles the SPI NOR flash chips on SoCFPGA.
On 20.04.2015 10:36, Pavel Machek wrote:
I see that u-boot 2015.04 has SPI flash configured in the socfpga_cyclone5_socrates.dts. But as far as I know, socdk should have same SPI flash, right? Should similar dts part be enabled there, too?
SPI NOR flash is working for me on SoCrates and another similar custom SOCFPGA based board just fine.
I just re-tested SPI NOR on SoCratres. And it also is broken starting with this commit:
$ git bisect good 0f36f957f4108d2d1d935e3076b7ae91f4e65a7d is the first bad commit commit 0f36f957f4108d2d1d935e3076b7ae91f4e65a7d Author: Simon Glass sjg@chromium.org
Even the v2015.04 release has non-working SPI NOR I'm afraid. In current master its fixed again. This patch here fixes this bug:
b3d023b4058acc83d211555e62068f84e322bcac "dm: spi_flash: fix wrong dependency"
I'll resend another mail to Tom, asking him to queue this patch for a potential v2015.04 stable release.
Thanks, Stefan
participants (4)
-
Marek Vasut -
Pavel Machek -
Pavel Machek -
Stefan Roese