Commit fc1f45ed authored by Hans de Goede's avatar Hans de Goede Committed by Kishon Vijay Abraham I
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phy-sun4i-usb: Add support for the usb-phys on the sun8i-a33 SoC 



The usb-phys on the sun8i-a33 SoC are mostly the same as sun8i-a23 but for
some reason (hw bug?) the phyctl register was moved to a different address
and is not initialized to 0 on reset.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 123dfdbc

Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ Required properties: 
  * allwinner,sun6i-a31-usb-phy

  * allwinner,sun7i-a20-usb-phy

  * allwinner,sun8i-a23-usb-phy

  * allwinner,sun8i-a33-usb-phy

- reg : a list of offset + length pairs

- reg-names :

  * "phy_ctrl"

drivers/phy/phy-sun4i-usb.c

+28 −11
Original line number Diff line number Diff line
@@ -40,9 +40,10 @@ 
#include <linux/workqueue.h>



#define REG_ISCR			0x00

#define REG_PHYCTL			0x04

#define REG_PHYCTL_A10			0x04

#define REG_PHYBIST			0x08

#define REG_PHYTUNE			0x0c

#define REG_PHYCTL_A33			0x10



#define PHYCTL_DATA			BIT(7)
@@ -90,6 +91,7 @@ struct sun4i_usb_phy_data { 
	struct mutex mutex;

	int num_phys;

	u32 disc_thresh;

	bool has_a33_phyctl;

	struct sun4i_usb_phy {

		struct phy *phy;

		void __iomem *pmu;
@@ -152,37 +154,46 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, 
{

	struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);

	u32 temp, usbc_bit = BIT(phy->index * 2);

	void *phyctl;

	int i;



	mutex_lock(&phy_data->mutex);



	if (phy_data->has_a33_phyctl) {

		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;

	}



	for (i = 0; i < len; i++) {

		temp = readl(phy_data->base + REG_PHYCTL);

		temp = readl(phyctl);



		/* clear the address portion */

		temp &= ~(0xff << 8);



		/* set the address */

		temp |= ((addr + i) << 8);

		writel(temp, phy_data->base + REG_PHYCTL);

		writel(temp, phyctl);



		/* set the data bit and clear usbc bit*/

		temp = readb(phy_data->base + REG_PHYCTL);

		temp = readb(phyctl);

		if (data & 0x1)

			temp |= PHYCTL_DATA;

		else

			temp &= ~PHYCTL_DATA;

		temp &= ~usbc_bit;

		writeb(temp, phy_data->base + REG_PHYCTL);

		writeb(temp, phyctl);



		/* pulse usbc_bit */

		temp = readb(phy_data->base + REG_PHYCTL);

		temp = readb(phyctl);

		temp |= usbc_bit;

		writeb(temp, phy_data->base + REG_PHYCTL);

		writeb(temp, phyctl);



		temp = readb(phy_data->base + REG_PHYCTL);

		temp = readb(phyctl);

		temp &= ~usbc_bit;

		writeb(temp, phy_data->base + REG_PHYCTL);

		writeb(temp, phyctl);



		data >>= 1;

	}
@@ -443,7 +454,8 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev) 
	dev_set_drvdata(dev, data);



	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-a23-usb-phy") ||

	    of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))

		data->num_phys = 2;

	else

		data->num_phys = 3;
@@ -455,11 +467,15 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev) 
		data->disc_thresh = 3;



	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-a23-usb-phy") ||

	    of_device_is_compatible(np, "allwinner,sun8i-a33-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;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");

	data->base = devm_ioremap_resource(dev, res);

	if (IS_ERR(data->base))
@@ -591,6 +607,7 @@ static const struct of_device_id sun4i_usb_phy_of_match[] = { 
	{ .compatible = "allwinner,sun6i-a31-usb-phy" },

	{ .compatible = "allwinner,sun7i-a20-usb-phy" },

	{ .compatible = "allwinner,sun8i-a23-usb-phy" },

	{ .compatible = "allwinner,sun8i-a33-usb-phy" },

	{ },

};

MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);

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