diff options
author | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
commit | 4961e02f1999e1c3468c09b2669c94d7c3ae82a8 (patch) | |
tree | 44c15abb09d7ba5e17a9aba95ee246648b1c1a8a /drivers/usb/musb/musb_gadget.c | |
parent | d14a0ebda7d3daede1a99c01527affb9ceaa4c22 (diff) | |
parent | a3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff) | |
download | linux-fsl-qoriq-4961e02f1999e1c3468c09b2669c94d7c3ae82a8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
-rw-r--r-- | drivers/usb/musb/musb_gadget.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index cbcf14a2..a9f288c 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -895,7 +895,14 @@ static int musb_gadget_enable(struct usb_ep *ep, /* REVISIT if can_bulk_split(), use by updating "tmp"; * likewise high bandwidth periodic tx */ - musb_writew(regs, MUSB_TXMAXP, tmp); + /* Set TXMAXP with the FIFO size of the endpoint + * to disable double buffering mode. Currently, It seems that double + * buffering has problem if musb RTL revision number < 2.0. + */ + if (musb->hwvers < MUSB_HWVERS_2000) + musb_writew(regs, MUSB_TXMAXP, hw_ep->max_packet_sz_tx); + else + musb_writew(regs, MUSB_TXMAXP, tmp); csr = MUSB_TXCSR_MODE | MUSB_TXCSR_CLRDATATOG; if (musb_readw(regs, MUSB_TXCSR) @@ -925,7 +932,13 @@ static int musb_gadget_enable(struct usb_ep *ep, /* REVISIT if can_bulk_combine() use by updating "tmp" * likewise high bandwidth periodic rx */ - musb_writew(regs, MUSB_RXMAXP, tmp); + /* Set RXMAXP with the FIFO size of the endpoint + * to disable double buffering mode. + */ + if (musb->hwvers < MUSB_HWVERS_2000) + musb_writew(regs, MUSB_RXMAXP, hw_ep->max_packet_sz_rx); + else + musb_writew(regs, MUSB_RXMAXP, tmp); /* force shared fifo to OUT-only mode */ if (hw_ep->is_shared_fifo) { @@ -1697,8 +1710,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver) return -EINVAL; /* driver must be initialized to support peripheral mode */ - if (!musb || !(musb->board_mode == MUSB_OTG - || musb->board_mode != MUSB_OTG)) { + if (!musb) { DBG(1, "%s, no dev??\n", __func__); return -ENODEV; } |