UTMIP parameters used to be hardcoded into tables in the
PHY driver. This patch reads them from the device tree instead
in accordance with the phy-tegra-usb DT documentation.
Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
drivers/usb/phy/phy-tegra-usb.c | 129 +++++++++++++++++++++++++++-------------
1 file changed, 87 insertions(+), 42 deletions(-)
diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
index b3b4809..0352886c 100644
--- a/drivers/usb/phy/phy-tegra-usb.c
+++ b/drivers/usb/phy/phy-tegra-usb.c
@@ -185,27 +185,6 @@ static const struct tegra_xtal_freq tegra_freq_table[] = {
},
};
-static struct tegra_utmip_config utmip_default[] = {
- [0] = {
- .hssync_start_delay = 9,
- .idle_wait_delay = 17,
- .elastic_limit = 16,
- .term_range_adj = 6,
- .xcvr_setup = 9,
- .xcvr_lsfslew = 1,
- .xcvr_lsrslew = 1,
- },
- [2] = {
- .hssync_start_delay = 9,
- .idle_wait_delay = 17,
- .elastic_limit = 16,
- .term_range_adj = 6,
- .xcvr_setup = 9,
- .xcvr_lsfslew = 2,
- .xcvr_lsrslew = 2,
- },
-};
-
static void set_pts(struct tegra_usb_phy *phy, u8 pts_val)
{
void __iomem *base = phy->regs;
@@ -727,13 +706,6 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy)
int i;
int err;
- if (!phy->is_ulpi_phy) {
- if (phy->is_legacy_phy)
- phy->config = &utmip_default[0];
- else
- phy->config = &utmip_default[2];
- }
-
phy->pll_u = devm_clk_get(phy->dev, "pll_u");
if (IS_ERR(phy->pll_u)) {
pr_err("Can't get pll_u clock\n");
@@ -808,6 +780,88 @@ void tegra_ehci_phy_restore_end(struct usb_phy *x)
}
EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
+static int read_utmi_param(struct platform_device *pdev, const char *param,
+ u8 *dest)
+{
+ u32 value;
+ int err = of_property_read_u32(pdev->dev.of_node, param, &value);
+ *dest = (u8)value;
+ if (err < 0)
+ dev_err(&pdev->dev, "Failed to read USB UTMI parameter %s: %d\n",
+ param, err);
+ return err;
+}
+
+static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy,
+ struct platform_device *pdev)
+{
+ struct resource *res;
+ int err;
+ struct tegra_utmip_config *config;
+
+ tegra_phy->is_ulpi_phy = false;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n");
+ return -ENXIO;
+ }
+
+ tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!tegra_phy->regs) {
+ dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n");
+ return -ENOMEM;
+ }
+
+ tegra_phy->config = devm_kzalloc(&pdev->dev,
+ sizeof(*tegra_phy->config), GFP_KERNEL);
+ if (!tegra_phy->config) {
+ dev_err(&pdev->dev,
+ "unable to allocate memory for USB UTMIP config\n");
+ return -ENOMEM;
+ }
+
+ config = tegra_phy->config;
+
+ err = read_utmi_param(pdev, "nvidia,hssync-start-delay",
+ &config->hssync_start_delay);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,elastic-limit",
+ &config->elastic_limit);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,idle-wait-delay",
+ &config->idle_wait_delay);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,term-range-adj",
+ &config->term_range_adj);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,xcvr-setup",
+ &config->xcvr_setup);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew",
+ &config->xcvr_lsfslew);
+ if (err < 0)
+ return err;
+
+ err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew",
+ &config->xcvr_lsrslew);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
static int tegra_usb_phy_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -839,20 +893,9 @@ static int tegra_usb_phy_probe(struct platform_device *pdev)
err = of_property_match_string(np, "phy_type", "ulpi");
if (err < 0) {
- tegra_phy->is_ulpi_phy = false;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n");
- return -ENXIO;
- }
-
- tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!tegra_phy->regs) {
- dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n");
- return -ENOMEM;
- }
+ err = utmi_phy_probe(tegra_phy, pdev);
+ if (err < 0)
+ return err;
} else {
tegra_phy->is_ulpi_phy = true;
@@ -863,6 +906,8 @@ static int tegra_usb_phy_probe(struct platform_device *pdev)
tegra_phy->reset_gpio);
return tegra_phy->reset_gpio;
}
+
+ tegra_phy->config = NULL;
}
err = of_property_match_string(np, "dr_mode", "otg");
--
1.8.1.5
--
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