Ajay Kumar Gupta <ajay.gupta@xxxxxx> wrote:
> AM35x supports only 32bit read operations so we need to have
> workaround for 8bit and 16bit read operations.
>
> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
> ---
> drivers/usb/musb/am3517.c | 30 ++++++++++++++++++++++++++++++
> drivers/usb/musb/musb_core.c | 2 ++
> 2 files changed, 32 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/musb/am3517.c b/drivers/usb/musb/am3517.c
> index dd9e883..24bdc2e 100644
> --- a/drivers/usb/musb/am3517.c
> +++ b/drivers/usb/musb/am3517.c
> @@ -515,3 +515,33 @@ void musb_platform_restore_context(struct musb_context_registers
> phy_on();
> }
> #endif
> +
> +/* AM35x supports only 32bit read operation */
> +void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
> +{
> + void __iomem *fifo = hw_ep->fifo;
> + u32 val;
> + int i;
> +
> + /* Read for 32bit-aligned destination address */
> + if ((likely((0x03 & (unsigned long) dst) == 0)) && len >= 4) {
> + readsl(fifo, dst, len >> 2);
> + dst += (len & ~0x03);
> + len &= 0x03;
> + }
> + /* Now read the rest 1 to 3 bytes or complete length if
check multiline comments style
> + * unaligned address.
> + */
> + if (len > 4) {
> + for (i = 0; i < (len >> 2); i++) {
> + val = musb_readl(fifo, 0);
> + memcpy(dst, &val, 4);
> + dst += 4;
> + }
> + len %= 4;
> + }
> + if (len > 0) {
> + val = musb_readl(fifo, 0);
> + memcpy(dst, &val, len);
> + }
> +}
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 705cc4a..bc2cf14 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -191,6 +191,7 @@ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
> }
> }
>
> +#if !defined(CONFIG_MACH_OMAP3517EVM)
> /*
> * Unload an endpoint's FIFO
> */
> @@ -228,6 +229,7 @@ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
> readsb(fifo, dst, len);
> }
> }
> +#endif
>
> #endif /* normal PIO */
>
> --
> 1.6.2.4
>
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