Adding Jim Lin (NV USB expert) to the review
-----Original Message----- From: Stefan Agner [mailto:stefan@agner.ch] Sent: Thursday, February 13, 2014 12:21 PM To: u-boot@lists.denx.de; swarren@wwwdotorg.org; Tom Warren; sjg@chromium.org; dev@lynxeye.de Cc: stefan@agner.ch Subject: [PATCH] usb: tegra: Fix PHY configuration for Tegra 3
On Tegra 3, the PTS (parallel transceiver select) and STS (serial transceiver select) are part of the HOSTPC1_DEVLC_0 register rather than PORTSC1_0 register. Since the reset configuration usually matches the configured registers, this error did not show up on Tegra 3 devices.
Also clear the forced powerdown bit in the UTMIP_PLL_CFG2_0 register which brings USB2 in UTMI mode to work. This was clearly missing since the forced powerdown bit is set in reset by default for all USB ports.
Signed-off-by: Stefan Agner stefan@agner.ch
drivers/usb/host/ehci-tegra.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 0b42aa5..fdd56c9 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -461,6 +461,9 @@ static int init_utmi_usb_controller(struct fdt_usb *config) if (config->periph_id == PERIPH_ID_USBD) clrbits_le32(&clkrst->crc_utmip_pll_cfg2,
UTMIP_FORCE_PD_SAMP_A_POWERDOWN);
if (config->periph_id == PERIPH_ID_USB2)clrbits_le32(&clkrst->crc_utmip_pll_cfg2,UTMIP_FORCE_PD_SAMP_B_POWERDOWN); if (config->periph_id == PERIPH_ID_USB3) clrbits_le32(&clkrst->crc_utmip_pll_cfg2,
UTMIP_FORCE_PD_SAMP_C_POWERDOWN); @@ -483,9 +486,15 @@ static int init_utmi_usb_controller(struct fdt_usb *config) clrbits_le32(&usbctlr->icusb_ctrl, IC_ENB1);
/* Select UTMI parallel interface */
- clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK,
PTS_UTMI << PTS_SHIFT);- clrbits_le32(&usbctlr->port_sc1, STS);
if (!controller->has_hostpc) {
clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK,PTS_UTMI << PTS_SHIFT);clrbits_le32(&usbctlr->port_sc1, STS);} else {
clrsetbits_le32(&usbctlr->hostpc1_devlc, PTS_MASK,PTS_UTMI << PTS_SHIFT);clrbits_le32(&usbctlr->hostpc1_devlc, STS);}
/* Deassert power down state */ clrbits_le32(&usbctlr->utmip_xcvr_cfg0,
UTMIP_FORCE_PD_POWERDOWN | @@ -543,7 +552,12 @@ static int init_ulpi_usb_controller(struct fdt_usb *config) ULPI_CLKOUT_PINMUX_BYP | ULPI_OUTPUT_PINMUX_BYP);
/* Select ULPI parallel interface */
- clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK, PTS_ULPI <<
PTS_SHIFT);
if (!controller->has_hostpc) {
clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK,PTS_ULPI << PTS_SHIFT);else
clrsetbits_le32(&usbctlr->hostpc1_devlc, PTS_MASK,PTS_ULPI << PTS_SHIFT);/* enable ULPI transceiver */ setbits_le32(&usbctlr->susp_ctrl, ULPI_PHY_ENB);
-- 1.8.5.4
-- nvpublic