diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/am35x.c | 32 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 6 |
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c index 2024940..1706c13 100644 --- a/drivers/usb/musb/am35x.c +++ b/drivers/usb/musb/am35x.c @@ -116,3 +116,35 @@ void musb_platform_deinit(void) /* Turn off the phy */ phy_off(); } + +/* + * This function reads data from endpoint fifo for AM35x + * which supports only 32bit read operation. + * + * ep - endpoint number + * 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; + u32 val; + int i; + + /* select the endpoint index */ + writeb(ep, &musbr->index); + + if (length > 4) { + for (i = 0; i < (length >> 2); i++) { + val = readl(&musbr->fifox[ep]); + memcpy(data, &val, 4); + data += 4; + } + length %= 4; + } + if (length > 0) { + val = readl(&musbr->fifox[ep]); + memcpy(data, &val, length); + } +} diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index dc740cf..6fe2c39 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -142,6 +142,11 @@ void write_fifo(u8 ep, u32 length, void *fifo_data) } /* + * AM35x supports only 32bit read operations so + * use seperate read_fifo() function for it. + */ +#ifndef CONFIG_USB_AM35X +/* * This function reads data from endpoint fifo * * ep - endpoint number @@ -160,3 +165,4 @@ void read_fifo(u8 ep, u32 length, void *fifo_data) while (length--) *data++ = readb(&musbr->fifox[ep]); } +#endif /* CONFIG_USB_AM35X */ |