usb: phy: tegra: Tegra30 support
The Tegra30 USB PHY is a bit different than the Tegra20 PHY:
- The EHCI controller supports the HOSTPC register extension, and some
of the fields that the PHY needs to modify (PHCD and PTS) have moved
to the new HOSTPC register.
- Some of the UTMI PLL configuration registers have moved from the USB
register space to the Clock-And-Reset controller space. In Tegra30
the clock driver is responsible for configuring the UTMI PLL.
- The USBMODE register must be explicitly written to enter host mode.
- Certain PHY parameters need to be programmed for optimal signal
quality. Support for this will be added in the next patch.
The new tegra_phy_soc_config structure is added to describe the
differences between the SoCs.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
index ebbf85f..1ad184a 100644
--- a/drivers/usb/phy/phy-tegra-usb.c
+++ b/drivers/usb/phy/phy-tegra-usb.c
@@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
@@ -39,11 +40,16 @@
#define ULPI_VIEWPORT 0x170
-/* PORTSC registers */
+/* PORTSC PTS/PHCD bits, Tegra20 only */
#define TEGRA_USB_PORTSC1 0x184
#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
#define TEGRA_USB_PORTSC1_PHCD (1 << 23)
+/* HOSTPC1 PTS/PHCD bits, Tegra30 and above */
+#define TEGRA_USB_HOSTPC1_DEVLC 0x1b4
+#define TEGRA_USB_HOSTPC1_DEVLC_PTS(x) (((x) & 0x7) << 29)
+#define TEGRA_USB_HOSTPC1_DEVLC_PHCD (1 << 22)
+
/* Bits of PORTSC1, which will get cleared by writing 1 into them */
#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
@@ -141,6 +147,12 @@
#define UTMIP_BIAS_CFG1 0x83c
#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
+/* For Tegra30 and above only, the address is different in Tegra20 */
+#define USB_USBMODE 0x1f8
+#define USB_USBMODE_MASK (3 << 0)
+#define USB_USBMODE_HOST (3 << 0)
+#define USB_USBMODE_DEVICE (2 << 0)
+
static DEFINE_SPINLOCK(utmip_pad_lock);
static int utmip_pad_count;
@@ -193,10 +205,17 @@
void __iomem *base = phy->regs;
unsigned long val;
- val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
- val &= ~TEGRA_USB_PORTSC1_PTS(3);
- val |= TEGRA_USB_PORTSC1_PTS(pts_val & 3);
- writel(val, base + TEGRA_USB_PORTSC1);
+ if (phy->soc_config->has_hostpc) {
+ val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
+ val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0);
+ val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val);
+ writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
+ } else {
+ val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
+ val &= ~TEGRA_USB_PORTSC1_PTS(~0);
+ val |= TEGRA_USB_PORTSC1_PTS(pts_val);
+ writel(val, base + TEGRA_USB_PORTSC1);
+ }
}
static void set_phcd(struct tegra_usb_phy *phy, bool enable)
@@ -204,12 +223,21 @@
void __iomem *base = phy->regs;
unsigned long val;
- val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
- if (enable)
- val |= TEGRA_USB_PORTSC1_PHCD;
- else
- val &= ~TEGRA_USB_PORTSC1_PHCD;
- writel(val, base + TEGRA_USB_PORTSC1);
+ if (phy->soc_config->has_hostpc) {
+ val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
+ if (enable)
+ val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD;
+ else
+ val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD;
+ writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
+ } else {
+ val = readl(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
+ if (enable)
+ val |= TEGRA_USB_PORTSC1_PHCD;
+ else
+ val &= ~TEGRA_USB_PORTSC1_PHCD;
+ writel(val, base + TEGRA_USB_PORTSC1);
+ }
}
static int utmip_pad_open(struct tegra_usb_phy *phy)
@@ -367,17 +395,21 @@
val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
writel(val, base + UTMIP_MISC_CFG0);
- val = readl(base + UTMIP_MISC_CFG1);
- val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) | UTMIP_PLLU_STABLE_COUNT(~0));
- val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
- UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
- writel(val, base + UTMIP_MISC_CFG1);
+ if (!phy->soc_config->utmi_pll_config_in_car_module) {
+ val = readl(base + UTMIP_MISC_CFG1);
+ val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) |
+ UTMIP_PLLU_STABLE_COUNT(~0));
+ val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
+ UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
+ writel(val, base + UTMIP_MISC_CFG1);
- val = readl(base + UTMIP_PLL_CFG1);
- val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) | UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
- val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
- UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
- writel(val, base + UTMIP_PLL_CFG1);
+ val = readl(base + UTMIP_PLL_CFG1);
+ val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) |
+ UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
+ val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
+ UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
+ writel(val, base + UTMIP_PLL_CFG1);
+ }
if (phy->mode == USB_DR_MODE_PERIPHERAL) {
val = readl(base + USB_SUSP_CTRL);
@@ -448,6 +480,16 @@
utmi_phy_clk_enable(phy);
+ if (phy->soc_config->requires_usbmode_setup) {
+ val = readl(base + USB_USBMODE);
+ val &= ~USB_USBMODE_MASK;
+ if (phy->mode == USB_DR_MODE_HOST)
+ val |= USB_USBMODE_HOST;
+ else
+ val |= USB_USBMODE_DEVICE;
+ writel(val, base + USB_USBMODE);
+ }
+
if (!phy->is_legacy_phy)
set_pts(phy, 0);
@@ -864,8 +906,30 @@
return 0;
}
+static const struct tegra_phy_soc_config tegra20_soc_config = {
+ .utmi_pll_config_in_car_module = false,
+ .has_hostpc = false,
+ .requires_usbmode_setup = false,
+ .requires_extra_tuning_parameters = false,
+};
+
+static const struct tegra_phy_soc_config tegra30_soc_config = {
+ .utmi_pll_config_in_car_module = true,
+ .has_hostpc = true,
+ .requires_usbmode_setup = true,
+ .requires_extra_tuning_parameters = true,
+};
+
+static struct of_device_id tegra_usb_phy_id_table[] = {
+ { .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config },
+ { .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
+
static int tegra_usb_phy_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct resource *res;
struct tegra_usb_phy *tegra_phy = NULL;
struct device_node *np = pdev->dev.of_node;
@@ -878,6 +942,13 @@
return -ENOMEM;
}
+ match = of_match_device(tegra_usb_phy_id_table, &pdev->dev);
+ if (!match) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ tegra_phy->soc_config = match->data;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get I/O memory\n");
@@ -968,12 +1039,6 @@
return 0;
}
-static struct of_device_id tegra_usb_phy_id_table[] = {
- { .compatible = "nvidia,tegra20-usb-phy", },
- { },
-};
-MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
-
static struct platform_driver tegra_usb_phy_driver = {
.probe = tegra_usb_phy_probe,
.remove = tegra_usb_phy_remove,