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usb: musb: make fifo support configurable

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The dynamic FIFO handling under MUSB is optional, and some parts (like
the Blackfin processor) do not implement support for it.

Due to this, the FIFO reading/writing steps need special handling, so
mark the common versions weak so drivers can override.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
This commit is contained in:
Bryan Wu 2009-12-16 22:03:59 -05:00 committed by Remy Bohmer
parent dc2cd05c91
commit df402ba381
1 changed files with 14 additions and 4 deletions
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18
drivers/usb/musb/musb_core.c
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@ -50,6 +50,16 @@ void musb_start(void)
#endif
}
#ifdef MUSB_NO_DYNAMIC_FIFO
# define config_fifo(dir, idx, addr)
#else
# define config_fifo(dir, idx, addr) \
do { \
writeb(idx, &musbr->dir##fifosz); \
writew(fifoaddr >> 3, &musbr->dir##fifoadd); \
} while (0)
#endif
/*
* This function configures the endpoint configuration. The musb hcd or musb
* device implementation can use this function to configure the endpoints
@ -74,8 +84,7 @@ void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt)
writeb(epinfo->epnum, &musbr->index);
if (epinfo->epdir) {
/* Configure fifo size and fifo base address */
writeb(idx, &musbr->txfifosz);
writew(fifoaddr >> 3, &musbr->txfifoadd);
config_fifo(tx, idx, fifoaddr);
csr = readw(&musbr->txcsr);
#if defined(CONFIG_MUSB_HCD)
@ -88,8 +97,7 @@ void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt)
&musbr->txcsr);
} else {
/* Configure fifo size and fifo base address */
writeb(idx, &musbr->rxfifosz);
writew(fifoaddr >> 3, &musbr->rxfifoadd);
config_fifo(rx, idx, fifoaddr);
csr = readw(&musbr->rxcsr);
#if defined(CONFIG_MUSB_HCD)
@ -113,6 +121,7 @@ void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt)
* length - number of bytes to write to FIFO
* fifo_data - Pointer to data buffer that contains the data to write
*/
__attribute__((weak))
void write_fifo(u8 ep, u32 length, void *fifo_data)
{
u8 *data = (u8 *)fifo_data;
@ -132,6 +141,7 @@ void write_fifo(u8 ep, u32 length, void *fifo_data)
* length - number of bytes to read from FIFO
* fifo_data - pointer to data buffer into which data is read
*/
__attribute__((weak))
void read_fifo(u8 ep, u32 length, void *fifo_data)
{
u8 *data = (u8 *)fifo_data;