linux/mmc/sdhci.h

2  *  linux/include/linux/mmc/sdhci.h - Secure Digital Host Controller Interface
26 /* Controller doesn't honor resets unless we touch the clock register */
28 /* Controller has bad caps bits, but really supports DMA */
30 /* Controller doesn't like to be reset when there is no card inserted. */
32 /* Controller doesn't like clearing the power reg before a change */
34 /* Controller has flaky internal state so reset it on each ios change */
36 /* Controller has an unusable DMA engine */
38 /* Controller has an unusable ADMA engine */
40 /* Controller can only DMA from 32-bit aligned addresses */
42 /* Controller can only DMA chunk sizes that are a multiple of 32 bits */
44 /* Controller can only ADMA chunks that are a multiple of 32 bits */
46 /* Controller needs to be reset after each request to stay stable */
48 /* Controller needs voltage and power writes to happen separately */
50 /* Controller provides an incorrect timeout value for transfers */
52 /* Controller has an issue with buffer bits for small transfers */
54 /* Controller does not provide transfer-complete interrupt when not busy */
56 /* Controller has unreliable card detection */
58 /* Controller reports inverted write-protect state */
60 /* Controller has nonstandard clock management */
62 /* Controller does not like fast PIO transfers */
64 /* Controller losing signal/interrupt enable states after reset */
66 /* Controller has to be forced to use block size of 2048 bytes */
68 /* Controller cannot do multi-block transfers */
70 /* Controller can only handle 1-bit data transfers */
72 /* Controller needs 10ms delay between applying power and clock */
74 /* Controller uses SDCLK instead of TMCLK for data timeouts */
76 /* Controller reports wrong base clock capability */
78 /* Controller cannot support End Attribute in NOP ADMA descriptor */
80 /* Controller is missing device caps. Use caps provided by host */
82 /* Controller uses Auto CMD12 command to stop the transfer */
84 /* Controller doesn't have HISPD bit field in HI-SPEED SD card */
86 /* Controller treats ADMA descriptors with length 0000h incorrectly */