linux-toradex.git/include/linux/mfd/rtsx_common.h, branch v4.4.4 Linux kernel for Apalis and Colibri modules mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req" 2014-05-08T07:44:50+00:00 Micky Ching micky_ching@realsil.com.cn 2014-04-29T01:54:54+00:00 98fcc5762dcecbb264fa4af5a9ae51136858e299 This reverts commit c42deffd5b53c9e583d83c7964854ede2f12410d. commit <mmc: rtsx: add support for pre_req and post_req> did use mutex_unlock() in tasklet, but mutex_unlock() can't be used in tasklet(atomic context). The driver needs to use mutex to avoid concurrency, so we can't use tasklet here, the patch need to be removed. The spinlock host->lock and pcr->lock may deadlock, one way to solve the deadlock is remove host->lock in sd_isr_done_transfer(), but if using workqueue the we can avoid using the spinlock and also avoid the problem. Signed-off-by: Micky Ching <micky_ching@realsil.com.cn> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 
This reverts commit c42deffd5b53c9e583d83c7964854ede2f12410d.

commit <mmc: rtsx: add support for pre_req and post_req> did use
mutex_unlock() in tasklet, but mutex_unlock() can't be used in
tasklet(atomic context). The driver needs to use mutex to avoid
concurrency, so we can't use tasklet here, the patch need to be
removed.

The spinlock host->lock and pcr->lock may deadlock, one way to solve
the deadlock is remove host->lock in sd_isr_done_transfer(), but if
using workqueue the we can avoid using the spinlock and also avoid
the problem.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
mmc: rtsx: add support for pre_req and post_req 2014-02-22T18:34:20+00:00 Micky Ching micky_ching@realsil.com.cn 2014-02-17T08:45:48+00:00 c42deffd5b53c9e583d83c7964854ede2f12410d Add support for non-blocking request, pre_req() runs dma_map_sg() and post_req() runs dma_unmap_sg(). This patch can increase card read/write speed, especially for high speed card and slow CPU(for some embedded platform). Users can get a great benefit from this patch. if CPU frequency is 800MHz, SDR104 or DDR50 card read/write speed may increase more than 15%. test results: intel i3(800MHz - 2.3GHz), SD card clock 208MHz performance mode(2.3GHz): Before: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.18191 s, 56.8 MB/s After: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.09276 s, 61.4 MB/s powersave mode(800MHz): Before: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.29569 s, 51.8 MB/s After: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.11218 s, 60.3 MB/s Signed-off-by: Micky Ching <micky_ching@realsil.com.cn> Signed-off-by: Chris Ball <chris@printf.net> 
Add support for non-blocking request, pre_req() runs dma_map_sg() and
post_req() runs dma_unmap_sg(). This patch can increase card read/write
speed, especially for high speed card and slow CPU(for some embedded
platform).

Users can get a great benefit from this patch. if CPU frequency is 800MHz,
SDR104 or DDR50 card read/write speed may increase more than 15%.

test results:
intel i3(800MHz - 2.3GHz), SD card clock 208MHz

performance mode(2.3GHz):
Before:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.18191 s, 56.8 MB/s
After:
 dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.09276 s, 61.4 MB/s

powersave mode(800MHz):
Before:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.29569 s, 51.8 MB/s
After:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.11218 s, 60.3 MB/s

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Chris Ball <chris@printf.net>
mfd: rtsx: Copyright modifications 2013-08-20T08:22:01+00:00 Wei WANG wei_wang@realsil.com.cn 2013-08-20T06:18:56+00:00 09fd86780bb4603df1886e17127f5beb97f70ffb Update copyright date, remove author address and add Roger Tseng. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> 
Update copyright date, remove author address and add Roger Tseng.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
mfd: rtsx: Add clock divider hook 2013-01-27T00:30:20+00:00 Wei WANG wei_wang@realsil.com.cn 2013-01-23T01:51:06+00:00 ab4e8f8b7bdfeff0c961fdbbdacb262d68f094c0 Add callback function conv_clk_and_div_n to convert between SSC clock and its divider N. For rtl8411, the formula to calculate SSC clock divider N is different with the other card reader models. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> 
Add callback function conv_clk_and_div_n to convert between SSC clock
and its divider N.
For rtl8411, the formula to calculate SSC clock divider N is different
with the other card reader models.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
drivers/mfd: Add realtek pcie card reader driver 2012-11-16T01:30:14+00:00 Wei WANG wei_wang@realsil.com.cn 2012-11-09T12:53:33+00:00 67d16a4686c9b94c8f52a66afe7521909aeb75b4 Realtek PCI-E card reader driver adapts requests from upper-level sdmmc/memstick layer to the real physical card reader. Signed-off-by: Wei WANG <wei_wang@realsil.com.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Realtek PCI-E card reader driver adapts requests from upper-level
sdmmc/memstick layer to the real physical card reader.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>