kernel/linux.git/drivers/mmc/host/mtk-sd.c, branch linux-4.4.y

mmc: mediatek: fix race condition between msdc_request_timeout and irq

2021-03-17T15:07:20+00:00

[ Upstream commit 0354ca6edd464a2cf332f390581977b8699ed081 ] when get request SW timeout, if CMD/DAT xfer done irq coming right now, then there is race between the msdc_request_timeout work and irq handler, and the host->cmd and host->data may set to NULL in irq handler. also, current flow ensure that only one path can go to msdc_request_done(), so no need check the return value of cancel_delayed_work(). Signed-off-by: Chaotian Jing Link: https://lore.kernel.org/r/20201218071611.12276-1-chaotian.jing@mediatek.com Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin

mmc: mediatek: fix cannot receive new request when msdc_cmd_is_ready fail

2019-11-28T17:25:38+00:00

[ Upstream commit f38a9774ddde9d79b3487dd888edd8b8623552af ] when msdc_cmd_is_ready return fail, the req_timeout work has not been inited and cancel_delayed_work() will return false, then, the request return directly and never call mmc_request_done(). so need call mod_delayed_work() before msdc_cmd_is_ready() Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin

mmc: mediatek: Fixed bug where clock frequency could be set wrong

2017-12-20T09:04:55+00:00

[ Upstream commit 40ceda09c8c84694c2ca6b00bcc6dc71e8e62d96 ] This patch can fix two issues: Issue 1: In previous code, div may be overflow when setting clock frequency as f_min. We can use DIV_ROUND_UP to fix this boundary related issue. Issue 2: In previous code, we can not set the correct clock frequency when div equals 0xff. Signed-off-by: Yong Mao Signed-off-by: Chaotian Jing Reviewed-by: Daniel Kurtz Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

mmc: mediatek: Preinitialize delay_phase in get_best_delay()

2015-11-09T12:16:44+00:00

drivers/mmc/host/mtk-sd.c: In function ‘get_best_delay’: drivers/mmc/host/mtk-sd.c:1284: warning: ‘delay_phase.start’ is used uninitialized in this function drivers/mmc/host/mtk-sd.c:1284: warning: ‘delay_phase.maxlen’ is used uninitialized in this function If delay is zero, these fields are indeed not initialized. Let the compiler preinitialize the whole struct to fix this. Signed-off-by: Geert Uytterhoeven Signed-off-by: Ulf Hansson

mmc: mediatek: add HS400 support

2015-10-27T09:40:38+00:00

add HS400 mode and tune support Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson

mmc: mediatek: add implement of ops->hw_reset()

2015-10-27T09:21:16+00:00

add implement of ops->hw_reset() for eMMC Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson

mmc: mediatek: fix got GPD checksum error interrupt when data transfer

2015-10-27T09:21:16+00:00

Even if we only use one gpd, we need alloc 2 gpd and make the gpd->next pointer to the second gpd, or may get gpd checksum error, this was checked by hardware Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson

mmc: mediatek: change the argument "ddr" to "timing"

2015-10-27T09:21:16+00:00

use the ios->timing directly is better It can reflect current timing and do settings by timing Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson

mmc: mediatek: make cmd_ints_mask to const

2015-10-27T09:21:15+00:00

cmd_ints_mask and data_ints_mask are constant value, so make it to const Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson

mmc: mediatek: Add MMC_CAP_RUNTIME_RESUME support

2015-10-26T14:59:59+00:00

Add MMC_CAP_RUNTIME_RESUME support to save resume time Drop unnecessary SDC_ARG write Signed-off-by: Chaotian Jing Signed-off-by: Ulf Hansson