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| author | Chris Brandt <chris.brandt@renesas.com> | 2019-05-15 10:20:43 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-21 10:25:59 +0200 |
| commit | f756066990607dbe8ea5579c925b48e646891f3e (patch) | |
| tree | e2cb8b70920d5f003621e48ec055eca111ec7628 | |
| parent | 2195e3af9079ea067079e98446ea6a457c81a98c (diff) | |
| download | linux-stable-f756066990607dbe8ea5579c925b48e646891f3e.tar.gz linux-stable-f756066990607dbe8ea5579c925b48e646891f3e.tar.bz2 linux-stable-f756066990607dbe8ea5579c925b48e646891f3e.zip | |
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>
| -rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 9 | ||||
| -rw-r--r-- | include/linux/usb/renesas_usbhs.h | 1 |
2 files changed, 8 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 diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index 9097a38fcda8..87043fd21d54 100644 --- a/include/linux/usb/renesas_usbhs.h +++ b/include/linux/usb/renesas_usbhs.h @@ -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 */ }; |