usb: phy: isp1301: implement PHY API

this patch implements ->init() and ->set_vbus()
methods for isp1301 transceiver driver.

Later patches can now come in order to remove
the hackery from ohci-nxp and lpc32xx udc drivers.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/usb/phy/phy-isp1301.c b/drivers/usb/phy/phy-isp1301.c
index 5e0f14369145..225ae6c97eeb 100644
--- a/drivers/usb/phy/phy-isp1301.c
+++ b/drivers/usb/phy/phy-isp1301.c
@@ -14,6 +14,7 @@
 #include <linux/mutex.h>
 #include <linux/i2c.h>
 #include <linux/usb/phy.h>
+#include <linux/usb/isp1301.h>
 
 #define DRV_NAME                "isp1301"
 
@@ -24,6 +25,8 @@ struct isp1301 {
         struct i2c_client       *client;
 };
 
+#define phy_to_isp(p)           (container_of((p), struct isp1301, phy))
+
 static const struct i2c_device_id isp1301_id[] = {
         { "isp1301", 0 },
         { }
@@ -31,6 +34,60 @@ static const struct i2c_device_id isp1301_id[] = {
 
 static struct i2c_client *isp1301_i2c_client;
 
+static int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear)
+{
+        return i2c_smbus_write_byte_data(isp->client, reg | clear, value);
+}
+
+static int isp1301_write(struct isp1301 *isp, u8 reg, u8 value)
+{
+        return __isp1301_write(isp, reg, value, 0);
+}
+
+static int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value)
+{
+        return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR);
+}
+
+static int isp1301_phy_init(struct usb_phy *phy)
+{
+        struct isp1301 *isp = phy_to_isp(phy);
+
+        /* Disable transparent UART mode first */
+        isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN);
+        isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG);
+        isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
+        isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0);
+        isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN
+                                | MC2_SPD_SUSP_CTRL));
+
+        isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0);
+        isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
+        isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN
+                                | OTG1_DP_PULLDOWN));
+        isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP
+                                | OTG1_DP_PULLUP));
+
+        /* mask all interrupts */
+        isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0);
+        isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0);
+        isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0);
+
+        return 0;
+}
+
+static int isp1301_phy_set_vbus(struct usb_phy *phy, int on)
+{
+        struct isp1301 *isp = phy_to_isp(phy);
+
+        if (on)
+                isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
+        else
+                isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV);
+
+        return 0;
+}
+
 static int isp1301_probe(struct i2c_client *client,
                          const struct i2c_device_id *i2c_id)
 {
@@ -46,6 +103,8 @@ static int isp1301_probe(struct i2c_client *client,
 
         phy = &isp->phy;
         phy->label = DRV_NAME;
+        phy->init = isp1301_phy_init;
+        phy->set_vbus = isp1301_phy_set_vbus;
         phy->type = USB_PHY_TYPE_USB2;
 
         i2c_set_clientdata(client, isp);