Current de-assert reset is not sufficient for the USB PHY reset on some Canyonlands platforms. The patch adds an assert/de-assert sequence. This addresses a USB detection problem for devices attached prior to power-up. The delay lengths are needed for power to the PHY to stabilize.
Signed-off-by: Jeff Mann MannJ@embeddedplanet.com Signed-off-by: Dave Mitchell dmitchell@appliedmicro.com Acked-by: Tirumala Reddy Marri tmarri@appliedmicro.com --- v1->v2: fixed typo
board/amcc/canyonlands/canyonlands.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/board/amcc/canyonlands/canyonlands.c b/board/amcc/canyonlands/canyonlands.c index 13a0dac..6c61122 100644 --- a/board/amcc/canyonlands/canyonlands.c +++ b/board/amcc/canyonlands/canyonlands.c @@ -177,8 +177,11 @@ int board_early_init_f(void) /* Remove NOR-FLASH, NAND-FLASH & EEPROM hardware write protection */ out_8((void *)CONFIG_SYS_BCSR_BASE + 5, 0);
- /* Enable USB host & USB-OTG */ + /* Enable USB host & USB-OTG;force assert,then de-assert PHY reset */ + out_8((void *)CONFIG_SYS_BCSR_BASE + 7, 1); + mdelay(100); out_8((void *)CONFIG_SYS_BCSR_BASE + 7, 0); + mdelay(100);
mtsdr(SDR0_SRST1, 0); /* Pull AHB out of reset default=1 */