[U-Boot] U-boot: Erase/read/write issue with S25fl256S flash device

Sourav Poddar sourav.poddar at ti.com
Mon Jun 17 04:45:42 EDT 2013


On Monday 17 June 2013 02:09 PM, Jagan Teki wrote:
> On Mon, Jun 17, 2013 at 1:11 PM, Sourav Poddar<sourav.poddar at ti.com>  wrote:
>> Hi Jagan,
>>
>> On Monday 17 June 2013 01:04 PM, Jagan Teki wrote:
>>> On Mon, Jun 17, 2013 at 12:49 PM, Sourav Poddar<sourav.poddar at ti.com>
>>> wrote:
>>>> On Monday 17 June 2013 12:44 PM, Jagan Teki wrote:
>>>>> On Mon, Jun 17, 2013 at 12:41 PM, Sourav Poddar<sourav.poddar at ti.com>
>>>>> wrote:
>>>>>> On Monday 17 June 2013 12:35 PM, Jagan Teki wrote:
>>>>>>> On Mon, Jun 17, 2013 at 12:28 PM, Sourav Poddar<sourav.poddar at ti.com>
>>>>>>> wrote:
>>>>>>>> HI Jagan,
>>>>>>>>
>>>>>>>> On Monday 17 June 2013 12:17 PM, Jagan Teki wrote:
>>>>>>>>> Hi Sourav,
>>>>>>>>>
>>>>>>>>> On Mon, Jun 17, 2013 at 11:44 AM, Sourav
>>>>>>>>> Poddar<sourav.poddar at ti.com>
>>>>>>>>> wrote:
>>>>>>>>>> Hi Jagan,
>>>>>>>>>>
>>>>>>>>>> On Saturday 15 June 2013 09:47 PM, Jagan Teki wrote:
>>>>>>>>>>> On 14-06-2013 20:13, Sourav Poddar wrote:
>>>>>>>>>>>> Hi Jagan,
>>>>>>>>>>>> On Friday 14 June 2013 08:08 PM, Jagan Teki wrote:
>>>>>>>>>>>>> On 14-06-2013 20:03, Sourav Poddar wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Wednesday 12 June 2013 01:00 PM, Sourav Poddar wrote:
>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I am working on qspi flash device S25FL256S at u-boot level. I
>>>>>>>>>>>>>>> am
>>>>>>>>>>>>>>> trying to
>>>>>>>>>>>>>>> make use of the existing spi_flash.c framework available at
>>>>>>>>>>>>>>> u-boot
>>>>>>>>>>>>>>> for
>>>>>>>>>>>>>>> erasing/reading/writing
>>>>>>>>>>>>>>> into the flash device.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> There are several issues(mentioned below), which I faced while
>>>>>>>>>>>>>>> using
>>>>>>>>>>>>>>> S25FL256s flash device
>>>>>>>>>>>>>>> with my dra7xx board which has a qspi controller to which the
>>>>>>>>>>>>>>> above
>>>>>>>>>>>>>>> mentioned flash device is attached.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 1. Erase (spi_flash_cmd_erase)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Issuing a command something like this..
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> sf erase 0x0 0x50000
>>>>>>>>>>>>>>>       - erases only first 0x20000 bytes of flash device,
>>>>>>>>>>>>>>> anything
>>>>>>>>>>>>>>> above
>>>>>>>>>>>>>>> that is not erase. I need to
>>>>>>>>>>>>>>>         issue separate commands after 0x20000 for every 0x10000
>>>>>>>>>>>>>>> bytes.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Am i missing anything here?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 2. read
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> sf read 81000000 0 0x10000
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Read is not happening properly. The last few byte along the 4k
>>>>>>>>>>>>>>> boundary always shows zero.
>>>>>>>>>>>>>>> Above 4k bytes, read is not happening.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> For ex:
>>>>>>>>>>>>>>>       DRA752 EVM # md 81000f00
>>>>>>>>>>>>>>> 81000f00: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f10: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f20: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f30: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f40: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f50: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f60: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f70: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f80: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000f90: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000fa0: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000fb0: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000fc0: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000fd0: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000fe0: ffffffff ffffffff ffffffff ffffffff
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>> 81000ff0: ffffffff ffffffff 00ffffff 00000000
>>>>>>>>>>>>>>> ................
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> In this dump, if you see 81000ff0 the last column shows 000000
>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>> is
>>>>>>>>>>>>>>> not expected. and it happens along every 4k bytes.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> So, to get rid of the above issue, I switched to page read
>>>>>>>>>>>>>>> with
>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>> below patch[1],
>>>>>>>>>>>>>>> which is giving me the correct result.
>>>>>>>>>>>>>>> [1]:
>>>>>>>>>>>>>>> @@ -147,17 +153,40 @@ int spi_flash_read_common(struct
>>>>>>>>>>>>>>> spi_flash
>>>>>>>>>>>>>>> *flash, const u8 *cmd,
>>>>>>>>>>>>>>>       int spi_flash_cmd_read_fast(struct spi_flash *flash, u32
>>>>>>>>>>>>>>> offset,
>>>>>>>>>>>>>>>                      size_t len, void *data)
>>>>>>>>>>>>>>>       {
>>>>>>>>>>>>>>> -       u8 cmd[5];
>>>>>>>>>>>>>>> +       unsigned long page_addr, byte_addr, page_size;
>>>>>>>>>>>>>>> +       size_t chunk_len, actual;
>>>>>>>>>>>>>>> +       int ret = 0;
>>>>>>>>>>>>>>> +       u8 cmd[4];
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>              /* Handle memory-mapped SPI */
>>>>>>>>>>>>>>>              if (flash->memory_map)
>>>>>>>>>>>>>>>                      memcpy(data, flash->memory_map + offset,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +       page_size = flash->page_size;
>>>>>>>>>>>>>>> +       page_addr = offset / page_size;
>>>>>>>>>>>>>>> +       byte_addr = offset % page_size;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +       cmd[0] = CMD_READ_ARRAY_SLOW;
>>>>>>>>>>>>>>> +       for (actual = 0; actual<      len; actual += chunk_len)
>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>> +               chunk_len = min(len - actual, page_size -
>>>>>>>>>>>>>>> byte_addr);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +               cmd[1] = page_addr>>      8;
>>>>>>>>>>>>>>> +               cmd[2] = page_addr;
>>>>>>>>>>>>>>> +               cmd[3] = byte_addr;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +               ret = spi_flash_read_common(flash, cmd,
>>>>>>>>>>>>>>> sizeof(cmd),
>>>>>>>>>>>>>>> data + actual, chunk_len);
>>>>>>>>>>>>>>> +               if (ret<      0) {
>>>>>>>>>>>>>>> +                       debug("SF: read failed");
>>>>>>>>>>>>>>> +                       break;
>>>>>>>>>>>>>>> +               }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -       cmd[0] = CMD_READ_ARRAY_FAST;
>>>>>>>>>>>>>>> -       spi_flash_addr(offset, cmd);
>>>>>>>>>>>>>>> -       cmd[4] = 0x00;
>>>>>>>>>>>>>>> +               byte_addr += chunk_len;
>>>>>>>>>>>>>>> +               if (byte_addr == page_size) {
>>>>>>>>>>>>>>> +                       page_addr++;
>>>>>>>>>>>>>>> +                       byte_addr = 0;
>>>>>>>>>>>>>>> +               }
>>>>>>>>>>>>>>> +       }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -       return spi_flash_read_common(flash, cmd, sizeof(cmd),
>>>>>>>>>>>>>>> data,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +       return ret;
>>>>>>>>>>>>>>>       }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Any idea about this?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 3.  write (spi_flash_cmd_write_multi)
>>>>>>>>>>>>>>>        write not happening properly.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> observations: only able to write single page, anything after a
>>>>>>>>>>>>>>> page
>>>>>>>>>>>>>>> is
>>>>>>>>>>>>>>> not getting
>>>>>>>>>>>>>>>              written.
>>>>>>>>>>>>>>> Workaround:
>>>>>>>>>>>>>>> I did a write disable latch at the end of every write
>>>>>>>>>>>>>>> cycle(page
>>>>>>>>>>>>>>> program) and enable it
>>>>>>>>>>>>>>> again for the next loop. With this, I see I get rid of the
>>>>>>>>>>>>>>> above
>>>>>>>>>>>>>>> issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       @@ -117,6 +117,12 @@ int spi_flash_cmd_write_multi(struct
>>>>>>>>>>>>>>> spi_flash
>>>>>>>>>>>>>>> *flash, u32 offset,
>>>>>>>>>>>>>>>                      if (ret)
>>>>>>>>>>>>>>>                              break;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +               ret = spi_flash_cmd_write_disable(flash);
>>>>>>>>>>>>>>> +               if (ret<      0) {
>>>>>>>>>>>>>>> +                       printf("SF: disabling write
>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>> +                       break;
>>>>>>>>>>>>>>> +               }
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Have anyone seen the above mentioned issues regarding
>>>>>>>>>>>>>>> read/write/erase? OR is there any
>>>>>>>>>>>>>>> configurations that I might be missing ?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Any Input on this?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Please wait, I am pushing some changes tonight or so.
>>>>>>>>>>>>>
>>>>>>>>>>>>> We will continue this thread, after testing your part with these
>>>>>>>>>>>>> new
>>>>>>>>>>>>> changes.
>>>>>>>>>>>>>
>>>>>>>>>>>>> I will intimate you once the push done.
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>> Jagan.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks a lot for the reply.
>>>>>>>>>>>> Sure, will wait for your changes to go in.
>>>>>>>>>>>
>>>>>>>>>>> Will take some time go these changes on master.
>>>>>>>>>>>
>>>>>>>>>>> Please checkout master-work branch in u-boot-spi repo
>>>>>>>>>>> git://git.denx.de/u-boot-spi.git
>>>>>>>>>>>
>>>>>>>>>>> and try to test 256S parts, fyi: I tested the same part got the
>>>>>>>>>>> +ve result.
>>>>>>>>>>>
>>>>>>>>>> Tested the above tree on my board.
>>>>>>>>>> But, still the issues remain the same for me in all the three
>>>>>>>>>> cases(erase/read/write).
>>>>>>>>>>
>>>>>>>>>> Here is the short log of the read command..
>>>>>>>>>> DRA752 EVM # sf probe 0
>>>>>>>>>> SF: Detected S25FL256S_64K with page size 64 KiB, total 32 MiB
>>>>>>>>>> SF: Warning - Only lower 16MiB accessible, Full access #define
>>>>>>>>>> CONFIG_SPI_FLASH_BAR
>>>>>>>>>> DRA752 EVM # sf erase 0x0 0x10000
>>>>>>>>>> SF: 65536 bytes @ 0x0 Erased: OK
>>>>>>>>>> DRA752 EVM # mw.b 0x81000100 0xff 0x10000
>>>>>>>>>> DRA752 EVM # sf read 0x81003000 0x0 0x10000
>>>>>>>>>> SF: 65536 bytes @ 0x0 Read: OK
>>>>>>>>>> DRA752 EVM # cmp.b 0x81003000  0x81000100  0x10000
>>>>>>>>>> byte at 0x81003ffb (0x0) != byte at 0x810010fb (0xff)
>>>>>>>>>> Total of 4091 byte(s) were the same
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Erase: not able to do with a single command, need to issue for
>>>>>>>>>> every
>>>>>>>>>> 0x10000
>>>>>>>>>> bytes.
>>>>>>>>>>
>>>>>>>>>> Write: Need to disable latch after every write to make it properly
>>>>>>>>>> work.
>>>>>>>>>>
>>>>>>>>>> Is it possible for you to  give me  basic commands which you might
>>>>>>>>>> have
>>>>>>>>>> ran
>>>>>>>>>> to confirm
>>>>>>>>>> the read/write and erase ??
>>>>>>>>> I tested the same part - for me i couldn't see the issues with
>>>>>>>>> SL256S
>>>>>>>>>
>>>>>>>>> OK! can enable the log on poll function, spi_flash_cmd_wait_ready()
>>>>>>>>> make debug ->      printf.
>>>>>>>>> Do the same test.! and send the log file.
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Thanks,
>>>>>>>>> Jagan.
>>>>>>>> Here is the output log, no change..
>>>>>>>>
>>>>>>>>
>>>>>>>> DRA752 EVM # sf probe 0
>>>>>>>> SF: Detected S25FL256S_64K with page size 64 KiB, total 32 MiB
>>>>>>>> DRA752 EVM # sf erase 0x0 0x10000
>>>>>>>> SF: 65536 bytes @ 0x0 Erased: OK
>>>>>>>> DRA752 EVM # mw.b 0x81000100 0xff 0x10000
>>>>>>>> DRA752 EVM # sf read 0x81003000 0x0 0x10000
>>>>>>>> SF: 65536 bytes @ 0x0 Read: OK
>>>>>>>> DRA752 EVM # cmp.b 0x81003000  0x81000100  0x10000
>>>>>>>> byte at 0x81003ffb (0x0) != byte at 0x810010fb (0xff)
>>>>>>>> Total of 4091 byte(s) were the same
>>>>>>>> DRA752 EVM #
>>>>>>>>
>>>>>>>>
>>>>>>>> Code change: for above output.
>>>>>>>> --- a/drivers/mtd/spi/spi_flash.c
>>>>>>>> +++ b/drivers/mtd/spi/spi_flash.c
>>>>>>>> @@ -85,7 +85,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash
>>>>>>>> *flash,
>>>>>>>> unsigned long timeout)
>>>>>>>>
>>>>>>>>             ret = spi_xfer(spi, 8,&cmd, NULL, SPI_XFER_BEGIN);
>>>>>>>>
>>>>>>>>             if (ret) {This is still not sent out for review. I can
>>>>>>>> send you the patch -               debug("SF: fail to read %s status
>>>>>>>> register\n",
>>>>>>>>
>>>>>>>> +               printf("SF: fail to read %s status register\n",
>>>>>>>>                             cmd == CMD_READ_STATUS ? "read" : "flag");
>>>>>>>>                     return ret;
>>>>>>>>             }
>>>>>>>> @@ -109,7 +109,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash
>>>>>>>> *flash,
>>>>>>>> unsigned long timeout)
>>>>>>>>                     return 0;
>>>>>>>>
>>>>>>>>             /* Timed out */
>>>>>>>> -       debug("SF: time out!\n");
>>>>>>>> +       printf("SF: time out!\n");
>>>>>>>>             return -1;
>>>>>>>>      }
>>>>>>>>
>>>>>>> Ohh..
>>>>>>>
>>>>>>> - What if you erase the entire flash and read back, same result is it?
>>>>>> Yes.
>>>>>>
>>>>>>> - please send the paths for config file for this board?
>>>>>> include/configs/dra7xx_evm.h
>>>>> I couldn't find any SPI flash configs on above config file,
>>>>> Can you point me the relevant configurations.
>>>>>
>>>> Following are the configuration details for spi..
>>>> #define CONFIG_SPI_FLASH_BAR
>>>> #define CONFIG_TI_QSPI
>>> Where can i find this?
>>>
>> I have attached the required patches in the thread.
>> Patch 0002 is my ti qspi controller.
>> Patch 0004 is my workarounds done for the all the issues
>> mentioned in the $subject patch.
>> Patch 0001 and 0002 are other configs.
>>
>>>> #define CONFIG_SPI_FLASH
>>>> #define CONFIG_SPI_FLASH_SPANSION
>>>> #define CONFIG_CMD_SF
>>>> #define CONFIG_CMD_SPI
>>>> #define CONFIG_SF_DEFAULT_SPEED         12000000
>>>> #define CONFIG_DEFAULT_SPI_MODE         SPI_MODE_3
>>>>
>>>> /* SPI SPL */
>>>> #define CONFIG_SPL_SPI_SUPPORT
>>>> #define CONFIG_SPL_SPI_LOAD
>>>> #define CONFIG_SPL_SPI_FLASH_SUPPORT
>>>> #define CONFIG_SPL_SPI_BUS              0
>>>> #define CONFIG_SPL_SPI_CS               0
>>>> #define CONFIG_SYS_SPI_U_BOOT_OFFS      0x20000
> Ohh... these drivers not yet in mainline.Ok?
>
They are not in mainline, yet. Due to above mentioned issue, I have not
  posted it yet.
> Did you ever tested any of other flash parts (other 256S) with these drivers.
> Let me give some time to go through these drivers code.
>
No, I don,t have any other board which has any other flash device.

> Do you confident that ti_qspi.c doesn't have any issues while
> processing SPI transactions.?
>
I tried putting a lot of prints, which does not show any obvious error.

Moreover, with the workaround mentioned before, things work fine.

> --
> Thanks,
> Jagan.




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