kernel.git/drivers/mmc/core/mmc_ops.c, branch linux-4.4.y

mmc: mmc: fix switch timeout issue caused by jiffies precision

2019-04-03T04:23:24Z

[ Upstream commit 987aa5f8059613bf85cbb6f64ffbd34f5cb7a9d1 ] with CONFIG_HZ=100, the precision of jiffies is 10ms, and the generic_cmd6_time of some card is also 10ms. then, may be current time is only 5ms, but already timed out caused by jiffies precision. Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin

mmc: mmc: extend the mmc_send_tuning()

2015-10-27T09:38:41Z

The mmc_execute_tuning() has already prepared the opcode, there is no need to prepare it again at mmc_send_tuning(), and, there is a BUG of mmc_send_tuning() to determine the opcode by bus width, assume eMMC was running at HS200, 4bit mode, then the mmc_send_tuning() will overwrite the opcode from CMD21 to CMD19, then got error. in addition, extend an argument of "cmd_error" to allow getting if there was cmd error when tune response. Signed-off-by: Chaotian Jing [Ulf: Rebased patch] Signed-off-by: Ulf Hansson

mmc: core: Convert __mmc_switch() into an internal core function

2015-10-26T14:59:54Z

As there are no users of the __mmc_switch() API, except for the mmc core itself, let's convert it from an exported function into an internal. Signed-off-by: Ulf Hansson

mmc: core: Separate out the mmc_switch status check so it can be re-used

2015-06-01T07:06:56Z

Make a separate function to do the mmc_switch status check so it can be re-used. This is preparation for adding support for HS400 re-tuning. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson

mmc: core: Hold re-tuning during switch commands

2015-06-01T07:06:54Z

Hold re-tuning during switch commands to prevent it from conflicting with the busy state or the CMD13 verification. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson

mmc: core: Make tuning block patterns static

2015-01-19T08:56:24Z

Since previous patches removed the need for the tuning block patterns to be exported, let's move them close to the mmc_send_tuning() API. Those are now intended to be used only by the mmc core. Signed-off-by: Ulf Hansson Reviewed-by: Stephen Boyd Acked-by: Jaehoon Chung

mmc: core: Let mmc_send_tuning() to take struct mmc_host* as parameter

2014-12-08T08:11:04Z

To be able to use mmc_send_tuning() prior the struct mmc_card has been allocated, let's convert it to take the struct mmc_host* as parameter instead. Suggested-by: Stephen Boyd Signed-off-by: Ulf Hansson Acked-by: Dong Aisheng Reviewed-by: Stephen Boyd

mmc: core: add core-level function for sending tuning commands

2014-11-26T13:36:51Z

According to the SD card spec, Add a manual tuning command function for SDR104/HS200. Sending command 19 or command 21 to read data and compare with the tunning block pattern. This patch will help to decrease some platform private codes in SDHCI platform_execute_tuning() callbacks. Signed-off-by: Minda Chen Signed-off-by: Barry Song Signed-off-by: Ulf Hansson

mmc: core: Convert to use kzalloc() for CXD register buffers

2014-11-10T11:40:45Z

While allocating buffers for CXD data, let's use kzalloc() to make sure those are zeroed. Signed-off-by: Ulf Hansson

mmc: core: Don't handle buffers on stack while fetching CXD registers

2014-11-10T11:40:45Z

Due to previous patches, all callers of mmc_send_cxd_data() now allocates their buffers from the heap. This enables us to simplify mmc_send_cxd_data() by removing the support of handling buffers, which are allocated from the stack. Signed-off-by: Ulf Hansson