musb_host: factor out musb_ep_{get|set}_qh()
Factor out the often used code to get/set the active 'qh' pointer for the hardware endpoint. Change the way the case of a shared FIFO is handled by setting *both* 'in_qh' and 'out_qh' fields of 'struct musb_hw_ep'. That seems more consistent and makes getting to the current 'qh' easy when the code knows the direction beforehand. While at it, turn some assignments into intializers and fix declaration style in the vicinity. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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846099a61c
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3e5c6dc711
1 changed files with 22 additions and 34 deletions
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@ -181,6 +181,19 @@ static inline void musb_h_tx_dma_start(struct musb_hw_ep *ep)
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musb_writew(ep->regs, MUSB_TXCSR, txcsr);
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}
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static void musb_ep_set_qh(struct musb_hw_ep *ep, int is_in, struct musb_qh *qh)
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{
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if (is_in != 0 || ep->is_shared_fifo)
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ep->in_qh = qh;
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if (is_in == 0 || ep->is_shared_fifo)
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ep->out_qh = qh;
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}
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static struct musb_qh *musb_ep_get_qh(struct musb_hw_ep *ep, int is_in)
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{
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return is_in ? ep->in_qh : ep->out_qh;
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}
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/*
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* Start the URB at the front of an endpoint's queue
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* end must be claimed from the caller.
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@ -210,7 +223,6 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh)
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case USB_ENDPOINT_XFER_CONTROL:
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/* control transfers always start with SETUP */
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is_in = 0;
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hw_ep->out_qh = qh;
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musb->ep0_stage = MUSB_EP0_START;
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buf = urb->setup_packet;
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len = 8;
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@ -239,10 +251,7 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh)
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epnum, buf + offset, len);
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/* Configure endpoint */
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if (is_in || hw_ep->is_shared_fifo)
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hw_ep->in_qh = qh;
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else
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hw_ep->out_qh = qh;
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musb_ep_set_qh(hw_ep, is_in, qh);
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musb_ep_program(musb, epnum, urb, !is_in, buf, offset, len);
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/* transmit may have more work: start it when it is time */
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@ -377,11 +386,8 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
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else
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ep->tx_reinit = 1;
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/* clobber old pointers to this qh */
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if (is_in || ep->is_shared_fifo)
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ep->in_qh = NULL;
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else
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ep->out_qh = NULL;
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/* Clobber old pointers to this qh */
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musb_ep_set_qh(ep, is_in, NULL);
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qh->hep->hcpriv = NULL;
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switch (qh->type) {
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@ -424,12 +430,7 @@ static void
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musb_advance_schedule(struct musb *musb, struct urb *urb,
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struct musb_hw_ep *hw_ep, int is_in)
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{
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struct musb_qh *qh;
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if (is_in || hw_ep->is_shared_fifo)
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qh = hw_ep->in_qh;
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else
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qh = hw_ep->out_qh;
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struct musb_qh *qh = musb_ep_get_qh(hw_ep, is_in);
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if (urb->status == -EINPROGRESS)
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qh = musb_giveback(qh, urb, 0);
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@ -692,15 +693,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
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void __iomem *mbase = musb->mregs;
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struct musb_hw_ep *hw_ep = musb->endpoints + epnum;
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void __iomem *epio = hw_ep->regs;
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struct musb_qh *qh;
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u16 packet_sz;
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if (!is_out || hw_ep->is_shared_fifo)
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qh = hw_ep->in_qh;
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else
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qh = hw_ep->out_qh;
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packet_sz = qh->maxpacket;
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struct musb_qh *qh = musb_ep_get_qh(hw_ep, !is_out);
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u16 packet_sz = qh->maxpacket;
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DBG(3, "%s hw%d urb %p spd%d dev%d ep%d%s "
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"h_addr%02x h_port%02x bytes %d\n",
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@ -1118,17 +1112,14 @@ void musb_host_tx(struct musb *musb, u8 epnum)
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u16 tx_csr;
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size_t length = 0;
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size_t offset = 0;
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struct urb *urb;
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struct musb_hw_ep *hw_ep = musb->endpoints + epnum;
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void __iomem *epio = hw_ep->regs;
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struct musb_qh *qh = hw_ep->is_shared_fifo ? hw_ep->in_qh
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: hw_ep->out_qh;
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struct musb_qh *qh = hw_ep->out_qh;
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struct urb *urb = next_urb(qh);
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u32 status = 0;
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void __iomem *mbase = musb->mregs;
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struct dma_channel *dma;
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urb = next_urb(qh);
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musb_ep_select(mbase, epnum);
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tx_csr = musb_readw(epio, MUSB_TXCSR);
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@ -1806,10 +1797,7 @@ static int musb_schedule(
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epnum++, hw_ep++) {
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int diff;
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if (is_in || hw_ep->is_shared_fifo) {
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if (hw_ep->in_qh != NULL)
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continue;
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} else if (hw_ep->out_qh != NULL)
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if (musb_ep_get_qh(hw_ep, is_in) != NULL)
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continue;
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if (hw_ep == musb->bulk_ep)
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