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Commit f7560669 authored by Chris Brandt's avatar Chris Brandt Committed by Greg Kroah-Hartman
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usb: renesas_usbhs: support byte addressable CFIFO 



Some SoC have a CFIFO register that is byte addressable. This means
when the CFIFO access is set to 32-bit, you can write 8-bit values to
addresses CFIFO+0, CFIFO+1, CFIFO+2, CFIFO+3.

Signed-off-by: default avatarChris Brandt <chris.brandt@renesas.com>
Reviewed-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: default avatarSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2195e3af

drivers/usb/renesas_usbhs/fifo.c

+7 −2
Original line number Diff line number Diff line
@@ -543,8 +543,13 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) 
	}



	/* the rest operation */

	if (usbhs_get_dparam(priv, cfifo_byte_addr)) {

		for (i = 0; i < len; i++)

			iowrite8(buf[i], addr + (i & 0x03));

	} else {

		for (i = 0; i < len; i++)

			iowrite8(buf[i], addr + (0x03 - (i & 0x03)));

	}



	/*

	 * variable update

include/linux/usb/renesas_usbhs.h

+1 −0
Original line number Diff line number Diff line
@@ -191,6 +191,7 @@ struct renesas_usbhs_driver_param { 
	u32 has_usb_dmac:1; /* for USB-DMAC */

	u32 runtime_pwctrl:1;

	u32 has_cnen:1;

	u32 cfifo_byte_addr:1; /* CFIFO is byte addressable */

#define USBHS_USB_DMAC_XFER_SIZE	32	/* hardcode the xfer size */

};