argh...reposting my response as text only since linux-mmc doesn't like
html mail. :(
On Tue, Apr 1, 2014 at 1:26 PM, Grant Grundler <grundler@xxxxxxxxxxxx> wrote:
>
>
>
> On Mon, Mar 31, 2014 at 9:17 PM, Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
> wrote:
>>
>> Hi, Seunguk.
>>
>> On 03/31/2014 07:51 PM, Seunguk Shin wrote:
>> > Some of Samsung eMMC does not show the argument for ffu in ext_csd.
>> > In case of this, eMMC shows 0x0 from ext_csd, Host has to modify the
>> > argument.
>> >
>> > Add "#define CID_MANFID_SAMSUNG 0x15"
>> If you need to add the Samsung eMMC specific code,
>> it would be better you would send the Samsung eMMC specific patch.
>> (based-on this patch.)
>
>
> I believe Seunguk Shin provided the information so someone else could add
> this code. I could be that person if no one from Samsung has have time for
> this. I'm very grateful to Seungguk for posting these details.
>
> I hope we can see the same details for Samsung eMMC 4.5 also (but please use
> a different email Subject line so we aren't confused.)
>
>> This patch isn't patch for samsung eMMC.
>> I didn't see this patch fully, but i think this patch is general code.
>
>
> AFAICT, the MANFID_SAMSUNG is only a "quirk" for Samsung devices which
> specify the EXT_CSD_FFU_ARG as 0.
>
> The original patch from SanDisk is general code and most of Seunguk's
> comments are general too. SanDisk (ie Avi) should please ACK they've seen
> those comments since I believe Seunguk is correct.
>
> And Avi, please let us know if/when you plan on posting a V2. Or at least
> not be offended if I get impatient and hijack this patch series. :)
>
> cheers,
> grant
>
>> Best Regards,
>> Jaehoon Chung
>>
>> >
>> >> +int mmc_ffu_download(struct mmc_card *card, struct mmc_command *cmd,
>> >> + u8 *data, int buf_bytes)
>> >> +{
>> >> + u8 ext_csd[CARD_BLOCK_SIZE];
>> >> + int err;
>> >> + int ret;
>> >> +
>> >> + /* Read the EXT_CSD */
>> >> + err = mmc_send_ext_csd(card, ext_csd);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d sending ext_csd\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >> +
>> >> + /* Check if FFU is supported by card */
>> >> + if (!FFU_SUPPORTED_MODE(ext_csd[EXT_CSD_SUPPORTED_MODE])) {
>> >> + err = -EINVAL;
>> >> + pr_err("FFU: %s: error %d FFU is not supported\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >> +
>> >> + err = mmc_host_set_ffu(card, ext_csd[EXT_CSD_FW_CONFIG]);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d FFU is not supported\n",
>> >> + mmc_hostname(card->host), err);
>> >> + err = -EINVAL;
>> >> + goto exit;
>> >> + }
>> >> +
>> >> + /* set device to FFU mode */
>> >> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> > EXT_CSD_MODE_CONFIG,
>> >> + MMC_FFU_MODE_SET, card->ext_csd.generic_cmd6_time);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d FFU is not supported\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit_normal;
>> >> + }
>> >> +
>> >> + /* set CMD ARG */
>> >> + cmd->arg = ext_csd[EXT_CSD_FFU_ARG] |
>> >> + ext_csd[EXT_CSD_FFU_ARG + 1] << 8 |
>> >> + ext_csd[EXT_CSD_FFU_ARG + 2] << 16 |
>> >> + ext_csd[EXT_CSD_FFU_ARG + 3] << 24;
>> >> +
>> >
>> > Add followings
>> > "
>> > /* If arg is zero, should be set to a special value for samsung
>> > eMMC
>> > */
>> > if ( card->cid.manfid == CID_MANFID_SAMSUNG && cmd->arg == 0x0 )
>> > {
>> > cmd->arg = 0xc7810000;
>> > }
>> > "
>> >
>> >> + err = mmc_ffu_write(card, data, cmd->arg, buf_bytes);
>> >> +
>> >> +exit_normal:
>> >> + /* host switch back to work in normal MMC Read/Write commands
>> >> */
>> >> + ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> + EXT_CSD_MODE_CONFIG, MMC_FFU_MODE_NORMAL,
>> >> + card->ext_csd.generic_cmd6_time);
>> >> + if (ret)
>> >> + err = ret;
>> >> +
>> >> +exit:
>> >> + return err;
>> >> +}
>> >> +EXPORT_SYMBOL(mmc_ffu_download);
>> >> +
>> >
>> >
>> >
>> > eMMC 5.0 Spec. says if device does not support MODE_OPERATION_CODES,
>> > device
>> > doesn't need to use NUMBER_OF_FW_SECTORS_CORRECTLY_PROGRAMMED.
>> > So, it's better to move the code for checking this value to
>> > FFU_FEATURES(ext_csd[EXT_CSD_FFU_FEATURES]
>> >
>> >> +int mmc_ffu_install(struct mmc_card *card) {
>> >> + u8 ext_csd[CARD_BLOCK_SIZE];
>> >> + int err;
>> >> + u32 ffu_data_len;
>> >> + u32 timeout;
>> >> +
>> >> + err = mmc_send_ext_csd(card, ext_csd);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d sending ext_csd\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >> +
>> >> + /* Check if FFU is supported */
>> >> + if (!FFU_SUPPORTED_MODE(ext_csd[EXT_CSD_SUPPORTED_MODE]) ||
>> >> + FFU_CONFIG(ext_csd[EXT_CSD_FW_CONFIG])) {
>> >> + err = -EINVAL;
>> >> + pr_err("FFU: %s: error %d FFU is not supported\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >
>> > Remove followings
>> > "
>> > ffu_data_len = ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG]|
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 1] << 8 |
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 2] << 16 |
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 3] << 24;
>> >
>> > if (!ffu_data_len) {
>> > err = -EPERM;
>> > return err;
>> > }
>> > "
>> >
>> >> +
>> >> + /* check mode operation */
>> >> + if (!FFU_FEATURES(ext_csd[EXT_CSD_FFU_FEATURES])) {
>> >> + /* restart the eMMC */
>> >> + err = mmc_ffu_restart(card);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d FFU install:\n",
>> >> + mmc_hostname(card->host), err);
>> >> + }
>> >> + } else {
>> >
>> > Add followings
>> > "
>> > ffu_data_len =
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG]|
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 1]
>> > << 8
>> > |
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 2]
>> > <<
>> > 16 |
>> > ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 3]
>> > <<
>> > 24;
>> >
>> > if (!ffu_data_len) {
>> > err = -EPERM;
>> > return err;
>> > }
>> > "
>> >
>> >> + /* set device to FFU mode */
>> >> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> + EXT_CSD_MODE_CONFIG, 0x1,
>> >> + card->ext_csd.generic_cmd6_time);
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d FFU is not
>> > supported\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >
>> >
>> >
>> > Checking ffu status in ext_csd should be done even if device does not
>> > support MODE_OPERATION_CODES So, it's better to move the code for
>> > checking
>> > this value to out of brace for
>> > FFU_FEATURES(ext_csd[EXT_CSD_FFU_FEATURES]
>> >
>> >> + /* set ext_csd to install mode */
>> >> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> + EXT_CSD_MODE_OPERATION_CODES,
>> >> + MMC_FFU_INSTALL_SET, timeout);
>> >> +
>> >> + if (err) {
>> >> + pr_err("FFU: %s: error %d setting
>> >> install
>> > mode\n",
>> >> + mmc_hostname(card->host), err);
>> >> + goto exit;
>> >> + }
>> >> +
>> >
>> > Remove followings
>> > "
>> > /* read ext_csd */
>> > err = mmc_send_ext_csd(card, ext_csd);
>> > if (err) {
>> > pr_err("FFU: %s: error %d sending
>> > ext_csd\n",
>> > mmc_hostname(card->host), err);
>> > goto exit;
>> > }
>> > /* return status */
>> > err = ext_csd[EXT_CSD_FFU_STATUS];
>> > if (err) {
>> > pr_err("FFU: %s: error %d FFU
>> > install:\n",
>> > mmc_hostname(card->host), err);
>> > err = -EINVAL;
>> > goto exit;
>> > }
>> > "
>> >
>> >> + }
>> >> +
>> >
>> > Add followings
>> > "
>> > /* read ext_csd */
>> > err = mmc_send_ext_csd(card, ext_csd);
>> > if (err) {
>> > pr_err("FFU: %s: error %d sending ext_csd\n",
>> > mmc_hostname(card->host), err);
>> > goto exit;
>> > }
>> > /* return status */
>> > err = ext_csd[EXT_CSD_FFU_STATUS];
>> > if (err) {
>> > pr_err("FFU: %s: error %d FFU install:\n",
>> > mmc_hostname(card->host), err);
>> > err = -EINVAL;
>> > goto exit;
>> > }
>> > "
>> >
>> >> +exit:
>> >> + return err;
>> >> +}
>> >> +EXPORT_SYMBOL(mmc_ffu_install);
>> >> +
>> >
>> >
>> >
>> > And some device's fw should be transferred with one command.
>> > They does not support multiple commands for fw transfer.
>> > For these devices, MMC_IOC_MAX_BYTES should be greater.
>> >
>> > diff --git a/include/uapi/linux/mmc/ioctl.h
>> > b/include/uapi/linux/mmc/ioctl.h
>> > index 1f5e689..af9ea62 100644
>> > --- a/include/uapi/linux/mmc/ioctl.h
>> > +++ b/include/uapi/linux/mmc/ioctl.h
>> > @@ -53,5 +53,5 @@ struct mmc_ioc_cmd {
>> > * is enforced per ioctl call. For larger data transfers, use the
>> > normal
>> > * block device operations.
>> > */
>> > -#define MMC_IOC_MAX_BYTES (512L * 256)
>> > +#define MMC_IOC_MAX_BYTES (512L * 1024)
>> > #endif /* LINUX_MMC_IOCTL_H */
>> >
>> >
>> > --
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>> >
>>
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