kernel/linux.git/drivers/mmc/core/sdio_ops.c, branch linux-4.7.y

mmc: remove unnecessary assignment statements before return

2016-02-29T10:02:47+00:00

Variable assignment just before return is redundant. Signed-off-by: Masahiro Yamada Signed-off-by: Ulf Hansson

mmc: sdio: Use multiple scatter/gather list

2012-12-06T18:54:43+00:00

Before this patch, we always used only single sg entry for SDIO transfer. This patch switches to using multiple sg entries. In the case of dwmci, it supports only up to 4KB size per single sg entry. So if we want to transfer more than 4KB, we should send more than 1 command. When we tested before applying this patch, it took around 335 us for 5K(5120) bytes transfer with dwmci controller. After applying this patch, it takes 242 us for 5K bytes. So this patch makes around 38% performance improvement for 5K bytes transfer. If the transfer size is bigger, then the performance improvement ratio will be increased. Signed-off-by: Kyoungil Kim Signed-off-by: Chris Ball

mmc: sdio: Fix to support any block size optimally

2012-01-12T04:58:40+00:00

This patch allows any block size to be set on the SDIO link, and still have an arbitrary sized packet (adjusted in size by using sdio_align_size) transferred in an optimal way (preferably one transfer). Previously if the block size was larger than the default of 512 bytes and the transfer size was exactly one block size (possibly thanks to using sdio_align_size to get an optimal transfer size), it was sent as a number of byte transfers instead of one block transfer. Also if the number of blocks was (max_blocks * N) + 1, the tranfer would be conducted with a number of blocks and finished off with a number of byte transfers. When doing this change it was also possible to break out the quirk for broken byte mode in a much cleaner way, and collect the logic of when to do byte or block transfer in one function instead of two. Signed-off-by: Stefan Nilsson XK Signed-off-by: Ulf Hansson Acked-by: Linus Walleij Signed-off-by: Chris Ball

mmc: sdio: Workaround for dev with broken CMD53

2011-10-26T20:32:02+00:00

Adds a quirk which can be turned on for SDIO devices that do not support 512 byte requests in byte mode during CMD53. These requests will always be sent in block mode instead. This patch also enables this quirk for ST-Ericsson CW1200 WLAN device. Signed-off-by: Stefan Nilsson XK Signed-off-by: Ulf HANSSON Acked-by: Linus Walleij Signed-off-by: Chris Ball

mmc: fix integer assignments to pointer

2011-10-26T19:43:35+00:00

Fix the sparse warning output "warning: Using plain integer as NULL pointer" Signed-off-by: Venkatraman S Signed-off-by: Chris Ball

mmc: initialize struct mmc_request at declaration time

2011-05-25T01:02:01+00:00

Converts from: struct mmc_request mrq; memset(&mrq, 0, sizeof(struct mmc_request)); to: struct mmc_request mrq = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball

mmc: initialize struct mmc_data at declaration time

2011-05-25T01:01:56+00:00

Converts from: struct mmc_data data; memset(&data, 0, sizeof(struct mmc_data)); to: struct mmc_data data = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball

mmc: initialize struct mmc_command at declaration time

2011-05-25T01:01:52+00:00

Converts from: struct mmc_command cmd; memset(&cmd, 0, sizeof(struct mmc_command)); to: struct mmc_command cmd = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball

sdio: recognize io card without powercycle

2010-03-12T23:52:28+00:00

SDIO Simplified Specification V2.00 states that it is strongly recommended that the host executes either a power reset or issues a CMD52 (I/O Reset) to re-initialize an I/O only card or the I/O portion of a combo card. Additionally, the CMD52 must be issued first because it cannot be issued after a CMD0. With this patch the Nintendo Wii SDIO-based WLAN card is detected after a system reset, without requiring a complete system powercycle. Signed-off-by: Albert Herranz Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

sdio: check that addresses are within the address space

2009-03-24T20:30:00+00:00

Signed-off-by: Pierre Ossman