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/*
* Copyright (C) 2016 Broadcom
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/mdio.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#define NSP_USB3_RST_CTRL_OFFSET 0x3f8
/* mdio reg access */
#define NSP_USB3_PHY_BASE_ADDR_REG 0x1f
#define NSP_USB3_PHY_PLL30_BLOCK 0x8000
#define NSP_USB3_PLL_CONTROL 0x01
#define NSP_USB3_PLLA_CONTROL0 0x0a
#define NSP_USB3_PLLA_CONTROL1 0x0b
#define NSP_USB3_PHY_TX_PMD_BLOCK 0x8040
#define NSP_USB3_TX_PMD_CONTROL1 0x01
#define NSP_USB3_PHY_PIPE_BLOCK 0x8060
#define NSP_USB3_LFPS_CMP 0x02
#define NSP_USB3_LFPS_DEGLITCH 0x03
struct nsp_usb3_phy {
struct regmap *usb3_ctrl;
struct phy *phy;
struct mdio_device *mdiodev;
};
static int nsp_usb3_phy_init(struct phy *phy)
{
struct nsp_usb3_phy *iphy = phy_get_drvdata(phy);
struct mii_bus *bus = iphy->mdiodev->bus;
int addr = iphy->mdiodev->addr;
u32 data;
int rc;
rc = regmap_read(iphy->usb3_ctrl, 0, &data);
if (rc)
return rc;
data |= 1;
rc = regmap_write(iphy->usb3_ctrl, 0, data);
if (rc)
return rc;
rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 1);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
NSP_USB3_PHY_PLL30_BLOCK);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x1000);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL0, 0x6400);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0xc000);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0x8000);
if (rc)
return rc;
rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 0);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x9000);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
NSP_USB3_PHY_PIPE_BLOCK);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_CMP, 0xf30d);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_DEGLITCH, 0x6302);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
NSP_USB3_PHY_TX_PMD_BLOCK);
if (rc)
return rc;
rc = mdiobus_write(bus, addr, NSP_USB3_TX_PMD_CONTROL1, 0x1003);
return rc;
}
static struct phy_ops nsp_usb3_phy_ops = {
.init = nsp_usb3_phy_init,
.owner = THIS_MODULE,
};
static int nsp_usb3_phy_probe(struct mdio_device *mdiodev)
{
struct device *dev = &mdiodev->dev;
struct phy_provider *provider;
struct nsp_usb3_phy *iphy;
iphy = devm_kzalloc(dev, sizeof(*iphy), GFP_KERNEL);
if (!iphy)
return -ENOMEM;
iphy->mdiodev = mdiodev;
iphy->usb3_ctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
"usb3-ctrl-syscon");
if (IS_ERR(iphy->usb3_ctrl))
return PTR_ERR(iphy->usb3_ctrl);
iphy->phy = devm_phy_create(dev, dev->of_node, &nsp_usb3_phy_ops);
if (IS_ERR(iphy->phy)) {
dev_err(dev, "failed to create PHY\n");
return PTR_ERR(iphy->phy);
}
phy_set_drvdata(iphy->phy, iphy);
provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
if (IS_ERR(provider)) {
dev_err(dev, "could not register PHY provider\n");
return PTR_ERR(provider);
}
return 0;
}
static const struct of_device_id nsp_usb3_phy_of_match[] = {
{.compatible = "brcm,nsp-usb3-phy",},
{ /* sentinel */ }
};
static struct mdio_driver nsp_usb3_phy_driver = {
.mdiodrv = {
.driver = {
.name = "nsp-usb3-phy",
.of_match_table = nsp_usb3_phy_of_match,
},
},
.probe = nsp_usb3_phy_probe,
};
mdio_module_driver(nsp_usb3_phy_driver);
MODULE_DESCRIPTION("Broadcom NSP USB3 PHY driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com");
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