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Commit c38a4f3f authored by Felipe Balbi's avatar Felipe Balbi
Browse files

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: default avatarFelipe Balbi <balbi@ti.com>
parent b774212e

drivers/usb/phy/phy-isp1301.c

+59 −0
Original line number Diff line number Diff line
@@ -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);