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

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Submitter Poddar, Sourav
Date June 17, 2013, 7:41 a.m.
Message ID <51BEBDAF.7000201@ti.com>
Download mbox | patch
Permalink /patch/251779/
State Rejected
Delegated to: Jagannadha Sutradharudu Teki
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Poddar, Sourav - June 17, 2013, 7:41 a.m.
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@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@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@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@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
> --
> Thanks,
> Jagan.
Jagannadha Sutradharudu Teki - June 17, 2013, 8:39 a.m.
On Mon, Jun 17, 2013 at 1:11 PM, Sourav Poddar <sourav.poddar@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@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@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@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@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?

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.

Do you confident that ti_qspi.c doesn't have any issues while
processing SPI transactions.?

--
Thanks,
Jagan.
Poddar, Sourav - June 17, 2013, 8:45 a.m.
On Monday 17 June 2013 02:09 PM, Jagan Teki wrote:
> On Mon, Jun 17, 2013 at 1:11 PM, Sourav Poddar<sourav.poddar@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@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@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@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@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.
Jagannadha Sutradharudu Teki - June 17, 2013, 9:58 a.m.
On Mon, Jun 17, 2013 at 2:15 PM, Sourav Poddar <sourav.poddar@ti.com> wrote:
> On Monday 17 June 2013 02:09 PM, Jagan Teki wrote:
>>
>> On Mon, Jun 17, 2013 at 1:11 PM, Sourav Poddar<sourav.poddar@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@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@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@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@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.

Did you confirm, there is no hw/board issues with this flash.
because I have tested the same part on xilinx zynq soc, zed board, i
couldn't see any issues.

>
>> 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.
I am not sure, the logic behind ti_omap.c
but might be some SPI transaction handling on controller for ever 0x1000 bytes.
Need to see.

>
> Moreover, with the workaround mentioned before, things work fine.
No, that work around is against the flash read concept, generally
flash read not in-terms of page sizes but your workaround does.

Need to digging more on 0x1000bytes - I am come back with any clue
means while I am also start looking your controller driver.
Can you send your trm link, does it available on web.

--
Thanks,
Jagan.
Poddar, Sourav - June 17, 2013, 10:20 a.m.
On Monday 17 June 2013 03:28 PM, Jagan Teki wrote:
> On Mon, Jun 17, 2013 at 2:15 PM, Sourav Poddar<sourav.poddar@ti.com>  wrote:
>> On Monday 17 June 2013 02:09 PM, Jagan Teki wrote:
>>> On Mon, Jun 17, 2013 at 1:11 PM, Sourav Poddar<sourav.poddar@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@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@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@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@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.
> Did you confirm, there is no hw/board issues with this flash.
> because I have tested the same part on xilinx zynq soc, zed board, i
> couldn't see any issues.
>
Yes, since the same board is used by BIOS/QNX people to validate the
flash using their driver.
>>> 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.
> I am not sure, the logic behind ti_omap.c
> but might be some SPI transaction handling on controller for ever 0x1000 bytes.
> Need to see.
>
>> Moreover, with the workaround mentioned before, things work fine.
> No, that work around is against the flash read concept, generally
> flash read not in-terms of page sizes but your workaround does.
>
Yes, I know, thats the whoile reason I have not posted my patches still.
> Need to digging more on 0x1000bytes - I am come back with any clue
> means while I am also start looking your controller driver.
> Can you send your trm link, does it available on web.
>
Its public version is not available yet, so I cant.

Is it possible for you to send me the output of following commands on 
your board?

sf erase 0 80000
sf read 81000000 0 80000
md 81000000
md 81030000

mw 84000000 aaaaaaaa 10000
sf write 84000000 0 10000
sf read 81000000 0 10000
md 81000000
md 81002000

~Sourav
> --
> Thanks,
> Jagan.

Patch

From e4139e66b956d17a9157a7b6d055e9f8c585041d Mon Sep 17 00:00:00 2001
From: Sourav Poddar <sourav.poddar@ti.com>
Date: Fri, 7 Jun 2013 17:15:36 +0530
Subject: [PATCH 4/5] drivers: mtd: spi: Modify read/write command for sfl256s flash.

Reading using the already supported read command is causing regression
even while reading 4k bytes, as a result doing a page by page read.

At the end of the write sequence, write enable latch should be disabled and
re enabled while doing the next page programming.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
---
 drivers/mtd/spi/spi_flash.c |   39 ++++++++++++++++++++++++++++++++++-----
 1 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 111185a..8c3a2cf 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -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;
+		}
+
 		byte_addr += chunk_len;
 		if (byte_addr == page_size) {
 			page_addr++;
@@ -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;
 }
 
 int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
-- 
1.7.1