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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: 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>
This commit is contained in:
Chris Brandt 2019-05-15 10:20:43 -05:00 committed by Greg Kroah-Hartman
parent 2195e3af90
commit f756066990
2 changed files with 8 additions and 2 deletions
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9
drivers/usb/renesas_usbhs/fifo.c
View File

@ -543,8 +543,13 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
} }
/* the rest operation */ /* the rest operation */
for (i = 0; i < len; i++) if (usbhs_get_dparam(priv, cfifo_byte_addr)) {
iowrite8(buf[i], addr + (0x03 - (i & 0x03))); 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 * variable update

1
include/linux/usb/renesas_usbhs.h
View File

@ -191,6 +191,7 @@ struct renesas_usbhs_driver_param {
u32 has_usb_dmac:1; /* for USB-DMAC */ u32 has_usb_dmac:1; /* for USB-DMAC */
u32 runtime_pwctrl:1; u32 runtime_pwctrl:1;
u32 has_cnen: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 */ #define USBHS_USB_DMAC_XFER_SIZE 32 /* hardcode the xfer size */
}; };