Move FIFO setup into a separate routine.
Signed-off-by: Aaro Koskinen <aaro.koski...@iki.fi>
---
drivers/staging/octeon-usb/octeon-hcd.c | 107 ++++++++++++++++----------------
1 file changed, 53 insertions(+), 54 deletions(-)
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c
b/drivers/staging/octeon-usb/octeon-hcd.c
index c7bfd5a..1ad69c5 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -608,6 +608,58 @@ static inline int cvmx_usb_get_data_pid(struct
cvmx_usb_pipe *pipe)
return 0; /* Data0 */
}
+static int cvmx_fifo_setup(struct cvmx_usb_state *usb)
+{
+ union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3;
+ union cvmx_usbcx_gnptxfsiz npsiz;
+ union cvmx_usbcx_hptxfsiz psiz;
+
+ usbcx_ghwcfg3.u32 = cvmx_usb_read_csr32(usb,
+ CVMX_USBCX_GHWCFG3(usb->index));
+
+ /*
+ * Program the USBC_GRXFSIZ register to select the size of the receive
+ * FIFO (25%).
+ */
+ USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index),
+ union cvmx_usbcx_grxfsiz, rxfdep,
+ usbcx_ghwcfg3.s.dfifodepth / 4);
+
+ /*
+ * Program the USBC_GNPTXFSIZ register to select the size and the start
+ * address of the non-periodic transmit FIFO for nonperiodic
+ * transactions (50%).
+ */
+ npsiz.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
+ npsiz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
+ npsiz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
+ cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), npsiz.u32);
+
+ /*
+ * Program the USBC_HPTXFSIZ register to select the size and start
+ * address of the periodic transmit FIFO for periodic transactions
+ * (25%).
+ */
+ psiz.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index));
+ psiz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
+ psiz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
+ cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), psiz.u32);
+
+ /* Flush all FIFOs */
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
+ union cvmx_usbcx_grstctl, txfnum, 0x10);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
+ union cvmx_usbcx_grstctl, txfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
+ union cvmx_usbcx_grstctl,
+ txfflsh, ==, 0, 100);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
+ union cvmx_usbcx_grstctl, rxfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
+ union cvmx_usbcx_grstctl,
+ rxfflsh, ==, 0, 100);
+}
+
/**
* Initialize a USB port for use. This must be called before any
* other access to the Octeon USB port is made. The port starts
@@ -913,8 +965,6 @@ static int cvmx_usb_shutdown(struct cvmx_usb_state *usb)
*/
static int cvmx_usb_enable(struct cvmx_usb_state *usb)
{
- union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3;
-
usb->usbcx_hprt.u32 = cvmx_usb_read_csr32(usb,
CVMX_USBCX_HPRT(usb->index));
@@ -954,59 +1004,8 @@ static int cvmx_usb_enable(struct cvmx_usb_state *usb)
*/
usb->usbcx_hprt.u32 = cvmx_usb_read_csr32(usb,
CVMX_USBCX_HPRT(usb->index));
- usbcx_ghwcfg3.u32 = cvmx_usb_read_csr32(usb,
- CVMX_USBCX_GHWCFG3(usb->index));
- /*
- * 13. Program the USBC_GRXFSIZ register to select the size of the
- * receive FIFO (25%).
- */
- USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index),
- union cvmx_usbcx_grxfsiz, rxfdep,
- usbcx_ghwcfg3.s.dfifodepth / 4);
- /*
- * 14. Program the USBC_GNPTXFSIZ register to select the size and the
- * start address of the non- periodic transmit FIFO for nonperiodic
- * transactions (50%).
- */
- {
- union cvmx_usbcx_gnptxfsiz siz;
-
- siz.u32 = cvmx_usb_read_csr32(usb,
- CVMX_USBCX_GNPTXFSIZ(usb->index));
- siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
- siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
- cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index),
- siz.u32);
- }
- /*
- * 15. Program the USBC_HPTXFSIZ register to select the size and start
- * address of the periodic transmit FIFO for periodic transactions
- * (25%).
- */
- {
- union cvmx_usbcx_hptxfsiz siz;
-
- siz.u32 = cvmx_usb_read_csr32(usb,
- CVMX_USBCX_HPTXFSIZ(usb->index));
- siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
- siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
- cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index),
- siz.u32);
- }
- /* Flush all FIFOs */
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
- union cvmx_usbcx_grstctl, txfnum, 0x10);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
- union cvmx_usbcx_grstctl, txfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
- union cvmx_usbcx_grstctl,
- txfflsh, ==, 0, 100);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
- union cvmx_usbcx_grstctl, rxfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
- union cvmx_usbcx_grstctl,
- rxfflsh, ==, 0, 100);
+ cvmx_fifo_setup(usb);
return 0;
}
--
2.2.0
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