phy/ralink/phy-ralink-usb.c

17 #include <linux/phy/phy.h>
56 	struct phy		*phy;
61 static void u2_phy_w32(struct ralink_usb_phy *phy, u32 val, u32 reg)
63 	writel(val, phy->base + reg);
66 static u32 u2_phy_r32(struct ralink_usb_phy *phy, u32 reg)
68 	return readl(phy->base + reg);
71 static void ralink_usb_phy_init(struct ralink_usb_phy *phy)
73 	u2_phy_r32(phy, OFS_U2_PHY_AC2);
74 	u2_phy_r32(phy, OFS_U2_PHY_ACR0);
75 	u2_phy_r32(phy, OFS_U2_PHY_DCR0);
77 	u2_phy_w32(phy, 0x00ffff02, OFS_U2_PHY_DCR0);
78 	u2_phy_r32(phy, OFS_U2_PHY_DCR0);
79 	u2_phy_w32(phy, 0x00555502, OFS_U2_PHY_DCR0);
80 	u2_phy_r32(phy, OFS_U2_PHY_DCR0);
81 	u2_phy_w32(phy, 0x00aaaa02, OFS_U2_PHY_DCR0);
82 	u2_phy_r32(phy, OFS_U2_PHY_DCR0);
83 	u2_phy_w32(phy, 0x00000402, OFS_U2_PHY_DCR0);
84 	u2_phy_r32(phy, OFS_U2_PHY_DCR0);
85 	u2_phy_w32(phy, 0x0048086a, OFS_U2_PHY_AC0);
86 	u2_phy_w32(phy, 0x4400001c, OFS_U2_PHY_AC1);
87 	u2_phy_w32(phy, 0xc0200000, OFS_U2_PHY_ACR3);
88 	u2_phy_w32(phy, 0x02000000, OFS_U2_PHY_DTM0);
91 static int ralink_usb_phy_power_on(struct phy *_phy)
93 	struct ralink_usb_phy *phy = phy_get_drvdata(_phy);
96 	/* enable the phy */
97 	regmap_update_bits(phy->sysctl, RT_SYSC_REG_CLKCFG1,
98 			   phy->clk, phy->clk);
101 	regmap_update_bits(phy->sysctl, RT_SYSC_REG_SYSCFG1,
106 	reset_control_deassert(phy->rsthost);
107 	reset_control_deassert(phy->rstdev);
115 	if (phy->base)
116 		ralink_usb_phy_init(phy);
119 	regmap_read(phy->sysctl, RT_SYSC_REG_USB_PHY_CFG, &t);
120 	dev_info(&phy->phy->dev, "remote usb device wakeup %s\n",
123 		dev_info(&phy->phy->dev, "UTMI 8bit 60MHz\n");
125 		dev_info(&phy->phy->dev, "UTMI 16bit 30MHz\n");
130 static int ralink_usb_phy_power_off(struct phy *_phy)
132 	struct ralink_usb_phy *phy = phy_get_drvdata(_phy);
134 	/* disable the phy */
135 	regmap_update_bits(phy->sysctl, RT_SYSC_REG_CLKCFG1,
136 			   phy->clk, 0);
139 	reset_control_assert(phy->rstdev);
140 	reset_control_assert(phy->rsthost);
174 	struct ralink_usb_phy *phy;
176 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
177 	if (!phy)
180 	phy->clk = (uintptr_t)device_get_match_data(&pdev->dev);
181 	phy->base = NULL;
183 	phy->sysctl = syscon_regmap_lookup_by_phandle(dev->of_node, "ralink,sysctl");
184 	if (IS_ERR(phy->sysctl)) {
186 		return PTR_ERR(phy->sysctl);
189 	/* The MT7628 and MT7688 require extra setup of PHY registers. */
191 		phy->base = devm_platform_ioremap_resource(pdev, 0);
192 		if (IS_ERR(phy->base)) {
194 			return PTR_ERR(phy->base);
198 	phy->rsthost = devm_reset_control_get(&pdev->dev, "host");
199 	if (IS_ERR(phy->rsthost)) {
201 		return PTR_ERR(phy->rsthost);
204 	phy->rstdev = devm_reset_control_get(&pdev->dev, "device");
205 	if (IS_ERR(phy->rstdev)) {
207 		return PTR_ERR(phy->rstdev);
210 	phy->phy = devm_phy_create(dev, NULL, &ralink_usb_phy_ops);
211 	if (IS_ERR(phy->phy)) {
212 		dev_err(dev, "failed to create PHY\n");
213 		return PTR_ERR(phy->phy);
215 	phy_set_drvdata(phy->phy, phy);
226 		.name  = "ralink-usb-phy",
231 MODULE_DESCRIPTION("Ralink USB phy driver");