1 // SPDX-License-Identifier: GPL-2.0-only
3  * Broadcom Northstar USB 3.0 PHY Driver
22 #include <linux/phy/phy.h>
54 	struct phy *phy;  member
59 		.compatible = "brcm,ns-ax-usb3-phy",
63 		.compatible = "brcm,ns-bx-usb3-phy",
69 static int bcm_ns_usb3_mdio_phy_write(struct bcm_ns_usb3 *usb3, u16 reg,
72 static int bcm_ns_usb3_phy_init_ns_bx(struct bcm_ns_usb3 *usb3)  in bcm_ns_usb3_phy_init_ns_bx()  argument
76 	/* USB3 PLL Block */  in bcm_ns_usb3_phy_init_ns_bx()
77 	err = bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,  in bcm_ns_usb3_phy_init_ns_bx()
83 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLL_CONTROL, 0x1000);  in bcm_ns_usb3_phy_init_ns_bx()
86 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL0, 0x6400);  in bcm_ns_usb3_phy_init_ns_bx()
89 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL1, 0xc000);  in bcm_ns_usb3_phy_init_ns_bx()
92 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL1, 0x8000);  in bcm_ns_usb3_phy_init_ns_bx()
94 	/* Deasserting USB3 system reset */  in bcm_ns_usb3_phy_init_ns_bx()
95 	writel(0, usb3->dmp + BCMA_RESET_CTL);  in bcm_ns_usb3_phy_init_ns_bx()
98 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLL_CONTROL, 0x9000);  in bcm_ns_usb3_phy_init_ns_bx()
101 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,  in bcm_ns_usb3_phy_init_ns_bx()
105 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_LFPS_CMP, 0xf30d);  in bcm_ns_usb3_phy_init_ns_bx()
108 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_LFPS_DEGLITCH, 0x6302);  in bcm_ns_usb3_phy_init_ns_bx()
111 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,  in bcm_ns_usb3_phy_init_ns_bx()
115 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_TX_PMD_CONTROL1, 0x1003);  in bcm_ns_usb3_phy_init_ns_bx()
120 static int bcm_ns_usb3_phy_init_ns_ax(struct bcm_ns_usb3 *usb3)  in bcm_ns_usb3_phy_init_ns_ax()  argument
125 	err = bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,  in bcm_ns_usb3_phy_init_ns_ax()
130 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL0, 0x6400);  in bcm_ns_usb3_phy_init_ns_ax()
132 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG, 0x80e0);  in bcm_ns_usb3_phy_init_ns_ax()
134 	bcm_ns_usb3_mdio_phy_write(usb3, 0x02, 0x009c);  in bcm_ns_usb3_phy_init_ns_ax()
137 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,  in bcm_ns_usb3_phy_init_ns_ax()
140 	bcm_ns_usb3_mdio_phy_write(usb3, 0x02, 0x21d3);  in bcm_ns_usb3_phy_init_ns_ax()
142 	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_TX_PMD_CONTROL1, 0x1003);  in bcm_ns_usb3_phy_init_ns_ax()
144 	/* Deasserting USB3 system reset */  in bcm_ns_usb3_phy_init_ns_ax()
145 	writel(0, usb3->dmp + BCMA_RESET_CTL);  in bcm_ns_usb3_phy_init_ns_ax()
150 static int bcm_ns_usb3_phy_init(struct phy *phy)  in bcm_ns_usb3_phy_init()  argument
152 	struct bcm_ns_usb3 *usb3 = phy_get_drvdata(phy);  in bcm_ns_usb3_phy_init()  local
155 	/* Perform USB3 system soft reset */  in bcm_ns_usb3_phy_init()
156 	writel(BCMA_RESET_CTL_RESET, usb3->dmp + BCMA_RESET_CTL);  in bcm_ns_usb3_phy_init()
158 	switch (usb3->family) {  in bcm_ns_usb3_phy_init()
160 		err = bcm_ns_usb3_phy_init_ns_ax(usb3);  in bcm_ns_usb3_phy_init()
163 		err = bcm_ns_usb3_phy_init_ns_bx(usb3);  in bcm_ns_usb3_phy_init()
167 		err = -ENOTSUPP;  in bcm_ns_usb3_phy_init()
182 static int bcm_ns_usb3_mdio_phy_write(struct bcm_ns_usb3 *usb3, u16 reg,  in bcm_ns_usb3_mdio_phy_write()  argument
185 	struct mdio_device *mdiodev = usb3->mdiodev;  in bcm_ns_usb3_mdio_phy_write()
192 	struct device *dev = &mdiodev->dev;  in bcm_ns_usb3_mdio_probe()
195 	struct bcm_ns_usb3 *usb3;  in bcm_ns_usb3_mdio_probe()  local
199 	usb3 = devm_kzalloc(dev, sizeof(*usb3), GFP_KERNEL);  in bcm_ns_usb3_mdio_probe()
200 	if (!usb3)  in bcm_ns_usb3_mdio_probe()
201 		return -ENOMEM;  in bcm_ns_usb3_mdio_probe()
203 	usb3->dev = dev;  in bcm_ns_usb3_mdio_probe()
204 	usb3->mdiodev = mdiodev;  in bcm_ns_usb3_mdio_probe()
206 	usb3->family = (enum bcm_ns_family)device_get_match_data(dev);  in bcm_ns_usb3_mdio_probe()
208 	syscon_np = of_parse_phandle(dev->of_node, "usb3-dmp-syscon", 0);  in bcm_ns_usb3_mdio_probe()
214 	usb3->dmp = devm_ioremap_resource(dev, &res);  in bcm_ns_usb3_mdio_probe()
215 	if (IS_ERR(usb3->dmp))  in bcm_ns_usb3_mdio_probe()
216 		return PTR_ERR(usb3->dmp);  in bcm_ns_usb3_mdio_probe()
218 	usb3->phy = devm_phy_create(dev, NULL, &ops);  in bcm_ns_usb3_mdio_probe()
219 	if (IS_ERR(usb3->phy)) {  in bcm_ns_usb3_mdio_probe()
220 		dev_err(dev, "Failed to create PHY\n");  in bcm_ns_usb3_mdio_probe()
221 		return PTR_ERR(usb3->phy);  in bcm_ns_usb3_mdio_probe()
224 	phy_set_drvdata(usb3->phy, usb3);  in bcm_ns_usb3_mdio_probe()
243 MODULE_DESCRIPTION("Broadcom Northstar USB 3.0 PHY Driver");