[U-Boot] [PATCH v2] usb: tegra: Fix PHY configuration for Tegra 3

[Stefan Agner]

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.

Also use the slightly different bit fields of first USB, (USBD)
on Tegra 2.

Signed-off-by: Stefan Agner <stefan at agner.ch>
---
 drivers/usb/host/ehci-tegra.c | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 0b42aa5..bd99bce 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 +486,21 @@ 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) {
+		if (config->periph_id == PERIPH_ID_USBD) {
+			clrsetbits_le32(&usbctlr->port_sc1, PTS1_MASK,
+					PTS_UTMI << PTS1_SHIFT);
+			clrbits_le32(&usbctlr->port_sc1, STS1);
+		} else {
+			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 +558,12 @@ 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