Hi Simon, On Thu, Mar 10, 2011 at 4:58 PM, Simon Horman <horms@xxxxxxxxxxxx> wrote: > This allows a ROM-able zImage to be written to eSD and for SuperH Mobile > ARM to boot directly from the SDHI hardware block. > > This is achieved by the MaskROM loading the first portion of the image into > MERAM and then jumping to it. This portion contains loader code which > copies the entire image to SDRAM and jumps to it. From there the zImage > boot code proceeds as normal, uncompressing the image into its final > location and then jumping to it. > > Cc: Magnus Damm <magnus.damm@xxxxxxxxx> > Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx> Nice to see some SDHI loader code! > --- /dev/null > +++ b/arch/arm/boot/compressed/sdhi-shmobile.c > +#define PORT179CR 0xe60520b3 > +#define PORT180CR 0xe60520b4 > +#define PORT181CR 0xe60520b5 > +#define PORT182CR 0xe60520b6 > +#define PORT183CR 0xe60520b7 > +#define PORT184CR 0xe60520b8 > + > +#define SMSTPCR3 0xe615013c > +#define SDGENCNTA 0xfe40009c These... > + /* Initialise SDHI1 */ > + /* PORT184CR: GPIO_FN_SDHICMD1 Control */ > + __raw_writeb(CR_FUNCTION1, PORT184CR); > + /* PORT179CR: GPIO_FN_SDHICLK1 Control */ > + __raw_writeb(CR_INPUT_ENABLE|CR_FUNCTION1, PORT179CR); > + /* PORT181CR: GPIO_FN_SDHID1_3 Control */ > + __raw_writeb(CR_FUNCTION1, PORT183CR); > + /* PORT182CR: GPIO_FN_SDHID1_2 Control */ > + __raw_writeb(CR_FUNCTION1, PORT182CR); > + /* PORT183CR: GPIO_FN_SDHID1_1 Control */ > + __raw_writeb(CR_FUNCTION1, PORT181CR); > + /* PORT180CR: GPIO_FN_SDHID1_0 Control */ > + __raw_writeb(CR_FUNCTION1, PORT180CR); > + > + /* Enable clock to SDHI1 hardware block */ > + __raw_writel(__raw_readl(SMSTPCR3) & ~(1 << 13), SMSTPCR3); ...and these are sh7372 specific. If possible I'd like to reuse your SDHI code on sh73a0, so please consider splitting up the code in a SDHI specific portion and in a processor specific portion. Thanks, / magnus -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
