[PATCH v2] phy-sun4i-usb: Add support for the host usb-phys found on the H3 SoC
Hans de Goede
hdegoede at redhat.com
Sun Nov 22 03:29:24 PST 2015
From: Reinder de Haan <patchesrdh at mveas.com>
Note this commit only adds support for phys 1-3, phy 0, the otg phy, is
not yet (fully) supported after this commit.
Signed-off-by: Reinder de Haan <patchesrdh at mveas.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
Changes in v2:
-Change break; after dev_err() to return, as intended, fixing a compiler
warning (the dev_err case should never be reached).
---
.../devicetree/bindings/phy/sun4i-usb-phy.txt | 1 +
drivers/phy/phy-sun4i-usb.c | 67 +++++++++++++++++-----
2 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
index 0cebf74..95736d7 100644
--- a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
+++ b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
@@ -9,6 +9,7 @@ Required properties:
* allwinner,sun7i-a20-usb-phy
* allwinner,sun8i-a23-usb-phy
* allwinner,sun8i-a33-usb-phy
+ * allwinner,sun8i-h3-usb-phy
- reg : a list of offset + length pairs
- reg-names :
* "phy_ctrl"
diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index b12964b..11bc9cd 100644
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -46,6 +46,9 @@
#define REG_PHYBIST 0x08
#define REG_PHYTUNE 0x0c
#define REG_PHYCTL_A33 0x10
+#define REG_PHY_UNK_H3 0x20
+
+#define REG_PMU_UNK_H3 0x10
#define PHYCTL_DATA BIT(7)
@@ -79,7 +82,7 @@
#define PHY_DISCON_TH_SEL 0x2a
#define PHY_SQUELCH_DETECT 0x3c
-#define MAX_PHYS 3
+#define MAX_PHYS 4
/*
* Note do not raise the debounce time, we must report Vusb high within 100ms
@@ -88,12 +91,19 @@
#define DEBOUNCE_TIME msecs_to_jiffies(50)
#define POLL_TIME msecs_to_jiffies(250)
+enum sun4i_usb_phy_type {
+ sun4i_a10_phy,
+ sun8i_a33_phy,
+ sun8i_h3_phy
+};
+
struct sun4i_usb_phy_data {
+ struct device *dev;
void __iomem *base;
struct mutex mutex;
int num_phys;
u32 disc_thresh;
- bool has_a33_phyctl;
+ enum sun4i_usb_phy_type type;
struct sun4i_usb_phy {
struct phy *phy;
void __iomem *pmu;
@@ -164,12 +174,18 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
mutex_lock(&phy_data->mutex);
- if (phy_data->has_a33_phyctl) {
+ switch (phy_data->type) {
+ case sun4i_a10_phy:
+ phyctl = phy_data->base + REG_PHYCTL_A10;
+ break;
+ case sun8i_a33_phy:
phyctl = phy_data->base + REG_PHYCTL_A33;
/* A33 needs us to set phyctl to 0 explicitly */
writel(0, phyctl);
- } else {
- phyctl = phy_data->base + REG_PHYCTL_A10;
+ break;
+ case sun8i_h3_phy:
+ dev_err(phy_data->dev, "H3 usb_phy_write is not supported\n");
+ return;
}
for (i = 0; i < len; i++) {
@@ -230,6 +246,7 @@ static int sun4i_usb_phy_init(struct phy *_phy)
struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
int ret;
+ u32 val;
ret = clk_prepare_enable(phy->clk);
if (ret)
@@ -241,15 +258,26 @@ static int sun4i_usb_phy_init(struct phy *_phy)
return ret;
}
- /* Enable USB 45 Ohm resistor calibration */
- if (phy->index == 0)
- sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
+ if (data->type == sun8i_h3_phy) {
+ if (phy->index == 0) {
+ val = readl(data->base + REG_PHY_UNK_H3);
+ writel(val & ~1, data->base + REG_PHY_UNK_H3);
+ }
+
+ val = readl(phy->pmu + REG_PMU_UNK_H3);
+ writel(val & ~2, phy->pmu + REG_PMU_UNK_H3);
+ } else {
+ /* Enable USB 45 Ohm resistor calibration */
+ if (phy->index == 0)
+ sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
- /* Adjust PHY's magnitude and rate */
- sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
+ /* Adjust PHY's magnitude and rate */
+ sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
- /* Disconnect threshold adjustment */
- sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->disc_thresh, 2);
+ /* Disconnect threshold adjustment */
+ sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
+ data->disc_thresh, 2);
+ }
sun4i_usb_phy_passby(phy, 1);
@@ -522,11 +550,14 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
mutex_init(&data->mutex);
INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
dev_set_drvdata(dev, data);
+ data->dev = dev;
if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
data->num_phys = 2;
+ else if (of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
+ data->num_phys = 4;
else
data->num_phys = 3;
@@ -538,13 +569,18 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
if (of_device_is_compatible(np, "allwinner,sun6i-a31-usb-phy") ||
of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
- of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
+ of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy") ||
+ of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
dedicated_clocks = true;
else
dedicated_clocks = false;
if (of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
- data->has_a33_phyctl = true;
+ data->type = sun8i_a33_phy;
+ else if (of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
+ data->type = sun8i_h3_phy;
+ else
+ data->type = sun4i_a10_phy;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
data->base = devm_ioremap_resource(dev, res);
@@ -620,7 +656,7 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
return PTR_ERR(phy->reset);
}
- if (i) { /* No pmu for usbc0 */
+ if (data->type == sun8i_h3_phy || i != 0) {
snprintf(name, sizeof(name), "pmu%d", i);
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, name);
@@ -696,6 +732,7 @@ static const struct of_device_id sun4i_usb_phy_of_match[] = {
{ .compatible = "allwinner,sun7i-a20-usb-phy" },
{ .compatible = "allwinner,sun8i-a23-usb-phy" },
{ .compatible = "allwinner,sun8i-a33-usb-phy" },
+ { .compatible = "allwinner,sun8i-h3-usb-phy" },
{ },
};
MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
--
2.5.0
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