About U-Boot for picozed

Hi gomo,

If you look under the hood for PetaLinux, when SPI+eMMC boot mode is set within the project configuration the following config options are set:

#define CONFIG_ZYNQ_SDHCI1t0xE0101000
#define CONFIG_ZYNQ_QSPI

Also, the following configuration options become removed:

#define CONFIG_ZYNQ_SDHCI0t0xE0100000

You will also need to setup appropriate U-Boot ENV macros to boot from QSPI+eMMC but the details of those can vary based upon how your Linux is being configured.  PetaLinux is a good example of how to do some of these different boot options because you can change things within the config menu and then go back and see which pieces of source code were modified to accommodate the changes.

Regards,

-Kevin

Hi,

Did you manage to solve this trouble ?

I'm quite in the same situation (all but xilinx-v2015.3 version of U-boot). I compared with the U-boot version in PetaLinux 2015.04 but without success.

The only error that appears at boot time is

   SF: Detected S25FL128S_64K with page size 256 Bytes, erase size 64 KiB, total 16 MiB
   *** Warning - bad CRC, using default environment

As soon as I enter "mmcinfo" command (did not try another), U-boot stops/hangs with the following message (when it appears) :

   my-zynq> mmcinfo
   sdhci_set_clock: Internal clock never stabilised.

Something is not correctly set but I cannot find what ? Any help would be appreciated.

Many thank in advance.

Hi,

I came to the Xilinx-v2016.2 version of U-boot and the situation evolved a bit, but some troubles remain :

1. the QSPI flash is still not detected. When U-boot starts, the following error message still appears :

Invalid bus 0 (err=-19)
*** Warning - spi_flash_probe() failed, using default environment

Any attempt to access the QSPI flash (sf probe) failed with the same error message.

Here is the QSPI description in the device tree :

                qspi: spi@e000d000 {
                        clock-names = "ref_clk", "pclk";
                        clocks = <&clkc 10>, <&clkc 43>;
                        compatible = "xlnx,zynq-qspi-1.0";
                        interrupt-parent = <&intc>;
                        interrupts = <0 19 4>;
                        reg = <0xe000d000 0x1000>;
                        #address-cells = <1>;
                        #size-cells = <0>;
                        is-dual = <0x0>;
                        num-cs = <0x1>;
                        xlnx,fb-clk = <0x0>;
                        xlnx,qspi-mode = <0x0>;

                        flash@0 {
                                compatible = "micron,s25fl129p1";
                                reg = <0x0>;
                                #address-cells = <0x1>;
                                #size-cells = <0x1>;
                                spi-max-frequency = <50000000>;

                                partition@0x00000000 {
                                        label = "boot";
                                        reg = <0x0 0x500000>;
                                };

                                partition@0x00500000 {
                                        label = "bootenv";
                                        reg = <0x500000 0x20000>;
                                };

                                partition@0x00520000 {
                                        label = "kernel";
                                        reg = <0x520000 0xa80000>;
                                };

                                partition@0x00fa0000 {
                                        label = "spare";
                                        reg = <0xfa0000 0x0>;
                                };
                        };
                };

What's wrong ?

2.  The eMMC is now viewed :

Zynq> mmcinfo
Device: sdhci@e0101000
Manufacturer ID: fe
OEM: 14e
Name: MMC04
Tran Speed: 52000000
Rd Block Len: 512
MMC version 4.4.1
High Capacity: Yes
Capacity: 3.5 GiB
Bus Width: 4-bit
Erase Group Size: 512 KiB
HC WP Group Size: 4 MiB
User Capacity: 3.5 GiB
Boot Capacity: 16 MiB ENH
RPMB Capacity: 128 KiB ENH

But for unknown reason, I cannot read the partition table :

Zynq> mmc dev 0
switch to partitions #0, OK
mmc0(part 0) is current device
Zynq> mmc part
## Unknown partition table

What could be wrong again ?

Any help about those points would be appreciated. Thanks in advance.

Hi,

Did you manage to solve this trouble ?  I am in the same situation with picozed.

   Copying Linux from QSPI flash to RAM...

Hi,

i had same problem and here is how i fixed it:

in <your_board>_defconfig file add

CONFIG_CMD_SF=y

CONFIG_ZYNQ_QSPI=y

and i also added the followong lines, but i am not sure if we really need all of them:

CONFIG_SPI_FLASH=y

CONFIG_SPI_FLASH_BAR=y

CONFIG_SPI_FLASH_MACRONIX=y

CONFIG_SPI_FLASH_SPANSION=y

CONFIG_SPI_FLASH_STMICRO=y

CONFIG_SPI_FLASH_WINBOND=y

Hopefully this will work for others...