[U-Boot] [Patch] MMC: modified calculated mmc-capacity & set mmc trans speed

[Jae hoon Chung]

The patches do the following
1.     If mmc is size is more than 2GB, need to calculate using the
ext_csd register.

2.     mmc_set_clock() is hard setting, that is not good solution.

If mmc is not MMC_MODE_HS, mmc will set card is tran_speed



Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>



---

drivers/mmc/mmc.c |   13 +++++++++----

1 files changed, 9 insertions(+), 4 deletions(-)



diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c

index b69ce15..13fa5c9 100644

--- a/drivers/mmc/mmc.c

+++ b/drivers/mmc/mmc.c

@@ -395,6 +395,10 @@ int mmc_change_freq(struct mmc *mmc)

         if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])

                    mmc->high_capacity = 1;



+         if (mmc->high_capacity)

+                   mmc->capacity = ((ext_csd[215] << 24) |
(ext_csd[214] << 16) |

+                              (ext_csd[213] << 8 | ext_csd[212]));

+

         cardtype = ext_csd[196] & 0xf;



         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);

@@ -779,11 +783,12 @@ int mmc_startup(struct mmc *mmc)



                    if (mmc->card_caps & MMC_MODE_HS) {

                               if (mmc->card_caps & MMC_MODE_HS_52MHz)

-                                         mmc_set_clock(mmc, 52000000);

+                                         mmc->tran_speed = 52000000;

                               else

-                                         mmc_set_clock(mmc, 26000000);

-                    } else

-                               mmc_set_clock(mmc, 20000000);

+                                         mmc->tran_speed = 26000000;

+                   }

+

+                   mmc_set_clock(mmc, mmc->tran_speed);

         }



         /* fill in device description */

--

1.6.0.4