Searched hist:"361 b8482" (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/drivers/mmc/host/ |
H A D | sdhci-esdhc-imx.c | 361b8482 Fri Mar 15 03:49:26 CDT 2013 Lucas Stach <l.stach@pengutronix.de> mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53
The eSDHC controller on the i.MX53 needs an additional, non spec compliant CMD12 after a multiblock read with a predefined number of blocks. Otherwise the internal state machine won't go back to the idle state.
This commit effectively reverts 5b6b0ad6 (mmc: sdhci-esdhc-imx: fix for mmc cards on i.MX5), which fixed part of the problem by making multiblock reads work, however this fix was not sufficient when multi- and singleblock reads got intermixed.
This implements the recommended workaround (Freescale i.MX Reference Manual, section 29.6.8 "Multi-block Read") by manually sending a CMD12 with the RSPTYP bits cleared.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Chris Ball <cjb@laptop.org> 361b8482 Fri Mar 15 03:49:26 CDT 2013 Lucas Stach <l.stach@pengutronix.de> mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53 The eSDHC controller on the i.MX53 needs an additional, non spec compliant CMD12 after a multiblock read with a predefined number of blocks. Otherwise the internal state machine won't go back to the idle state. This commit effectively reverts 5b6b0ad6 (mmc: sdhci-esdhc-imx: fix for mmc cards on i.MX5), which fixed part of the problem by making multiblock reads work, however this fix was not sufficient when multi- and singleblock reads got intermixed. This implements the recommended workaround (Freescale i.MX Reference Manual, section 29.6.8 "Multi-block Read") by manually sending a CMD12 with the RSPTYP bits cleared. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Chris Ball <cjb@laptop.org>
|