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authorChris Brandt <chris.brandt@renesas.com>2019-05-15 18:20:43 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-21 11:25:59 +0300
commitf756066990607dbe8ea5579c925b48e646891f3e (patch)
treee2cb8b70920d5f003621e48ec055eca111ec7628 /drivers/usb/renesas_usbhs
parent2195e3af9079ea067079e98446ea6a457c81a98c (diff)
downloadlinux-f756066990607dbe8ea5579c925b48e646891f3e.tar.xz
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: Chris Brandt <chris.brandt@renesas.com> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/renesas_usbhs')
-rw-r--r--drivers/usb/renesas_usbhs/fifo.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 39fa2fc1b8b7..452b456ac24e 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -543,8 +543,13 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
}
/* the rest operation */
- for (i = 0; i < len; i++)
- iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
+ 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