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ARM: OMAP: DMA: Remove __REG access

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Remove __REG access in DMA code, use dma_read/write instead:

- dynamically set the omap_dma_base based on the omap type
- omap_read/write becomes dma_read/write
- dma channel registers are read with dma_ch_read/write

Cc: David Brownell <david-b@pacbell.net>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren
2008-07-03 12:24:36 +03:00
parent 4d96372e6d
commit 0499bdeb1d
3 changed files with 450 additions and 305 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/usb/gadget/omap_udc.c
View File

@@ -491,32 +491,6 @@ static int read_fifo(struct omap_ep *ep, struct omap_req *req)
/*-------------------------------------------------------------------------*/
static inline dma_addr_t dma_csac(unsigned lch)
{
dma_addr_t csac;
/* omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
* read before the DMA controller finished disabling the channel.
*/
csac = OMAP_DMA_CSAC_REG(lch);
if (csac == 0)
csac = OMAP_DMA_CSAC_REG(lch);
return csac;
}
static inline dma_addr_t dma_cdac(unsigned lch)
{
dma_addr_t cdac;
/* omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
* read before the DMA controller finished disabling the channel.
*/
cdac = OMAP_DMA_CDAC_REG(lch);
if (cdac == 0)
cdac = OMAP_DMA_CDAC_REG(lch);
return cdac;
}
static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
{
dma_addr_t end;
@@ -527,7 +501,7 @@ static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
if (cpu_is_omap15xx())
return 0;
end = dma_csac(ep->lch);
end = omap_get_dma_src_pos(ep->lch);
if (end == ep->dma_counter)
return 0;
@@ -537,15 +511,11 @@ static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
return end - start;
}
#define DMA_DEST_LAST(x) (cpu_is_omap15xx() \
? OMAP_DMA_CSAC_REG(x) /* really: CPC */ \
: dma_cdac(x))
static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
{
dma_addr_t end;
end = DMA_DEST_LAST(ep->lch);
end = omap_get_dma_dst_pos(ep->lch);
if (end == ep->dma_counter)
return 0;
@@ -596,7 +566,7 @@ static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
0, 0);
omap_start_dma(ep->lch);
ep->dma_counter = dma_csac(ep->lch);
ep->dma_counter = omap_get_dma_src_pos(ep->lch);
UDC_DMA_IRQ_EN_REG |= UDC_TX_DONE_IE(ep->dma_channel);
UDC_TXDMA_REG(ep->dma_channel) = UDC_TXN_START | txdma_ctrl;
req->dma_bytes = length;
@@ -654,7 +624,7 @@ static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
0, 0);
ep->dma_counter = DMA_DEST_LAST(ep->lch);
ep->dma_counter = omap_get_dma_dst_pos(ep->lch);
UDC_RXDMA_REG(ep->dma_channel) = UDC_RXN_STOP | (packets - 1);
UDC_DMA_IRQ_EN_REG |= UDC_RX_EOT_IE(ep->dma_channel);
@@ -834,7 +804,7 @@ static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
/* channel type P: hw synch (fifo) */
if (cpu_class_is_omap1() && !cpu_is_omap15xx())
OMAP1_DMA_LCH_CTRL_REG(ep->lch) = 2;
omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
}
just_restart:
@@ -881,7 +851,7 @@ static void dma_channel_release(struct omap_ep *ep)
else
req = NULL;
active = ((1 << 7) & OMAP_DMA_CCR_REG(ep->lch)) != 0;
active = omap_get_dma_active_status(ep->lch);
DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
active ? "active" : "idle",