3  * PCIe host controller driver for Rockchip SoCs.
5  * Copyright (C) 2021 Rockchip Electronics Co., Ltd.
56 static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip,  in rockchip_pcie_readl_apb()  argument
59 	return readl_relaxed(rockchip->apb_base + reg);  in rockchip_pcie_readl_apb()
62 static void rockchip_pcie_writel_apb(struct rockchip_pcie *rockchip,  in rockchip_pcie_writel_apb()  argument
65 	writel_relaxed(val, rockchip->apb_base + reg);  in rockchip_pcie_writel_apb()
68 static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)  in rockchip_pcie_enable_ltssm()  argument
70 	rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_ENABLE_LTSSM,  in rockchip_pcie_enable_ltssm()
76 	struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);  in rockchip_pcie_link_up()  local
77 	u32 val = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);  in rockchip_pcie_link_up()
88 	struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);  in rockchip_pcie_start_link()  local
91 	gpiod_set_value_cansleep(rockchip->rst_gpio, 0);  in rockchip_pcie_start_link()
93 	rockchip_pcie_enable_ltssm(rockchip);  in rockchip_pcie_start_link()
105 	gpiod_set_value_cansleep(rockchip->rst_gpio, 1);  in rockchip_pcie_start_link()
113 	struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);  in rockchip_pcie_host_init()  local
117 	rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL);  in rockchip_pcie_host_init()
119 	rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_RC_MODE,  in rockchip_pcie_host_init()
129 static int rockchip_pcie_clk_init(struct rockchip_pcie *rockchip)  in rockchip_pcie_clk_init()  argument
131 	struct device *dev = rockchip->pci.dev;  in rockchip_pcie_clk_init()
134 	ret = devm_clk_bulk_get_all(dev, &rockchip->clks);  in rockchip_pcie_clk_init()
138 	rockchip->clk_cnt = ret;  in rockchip_pcie_clk_init()
140 	return clk_bulk_prepare_enable(rockchip->clk_cnt, rockchip->clks);  in rockchip_pcie_clk_init()
144 				      struct rockchip_pcie *rockchip)  in rockchip_pcie_resource_get()  argument
146 	rockchip->apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");  in rockchip_pcie_resource_get()
147 	if (IS_ERR(rockchip->apb_base))  in rockchip_pcie_resource_get()
148 		return PTR_ERR(rockchip->apb_base);  in rockchip_pcie_resource_get()
150 	rockchip->rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",  in rockchip_pcie_resource_get()
152 	if (IS_ERR(rockchip->rst_gpio))  in rockchip_pcie_resource_get()
153 		return PTR_ERR(rockchip->rst_gpio);  in rockchip_pcie_resource_get()
158 static int rockchip_pcie_phy_init(struct rockchip_pcie *rockchip)  in rockchip_pcie_phy_init()  argument
160 	struct device *dev = rockchip->pci.dev;  in rockchip_pcie_phy_init()
163 	rockchip->phy = devm_phy_get(dev, "pcie-phy");  in rockchip_pcie_phy_init()
164 	if (IS_ERR(rockchip->phy))  in rockchip_pcie_phy_init()
165 		return dev_err_probe(dev, PTR_ERR(rockchip->phy),  in rockchip_pcie_phy_init()
168 	ret = phy_init(rockchip->phy);  in rockchip_pcie_phy_init()
172 	ret = phy_power_on(rockchip->phy);  in rockchip_pcie_phy_init()
174 		phy_exit(rockchip->phy);  in rockchip_pcie_phy_init()
179 static void rockchip_pcie_phy_deinit(struct rockchip_pcie *rockchip)  in rockchip_pcie_phy_deinit()  argument
181 	phy_exit(rockchip->phy);  in rockchip_pcie_phy_deinit()
182 	phy_power_off(rockchip->phy);  in rockchip_pcie_phy_deinit()
185 static int rockchip_pcie_reset_control_release(struct rockchip_pcie *rockchip)  in rockchip_pcie_reset_control_release()  argument
187 	struct device *dev = rockchip->pci.dev;  in rockchip_pcie_reset_control_release()
189 	rockchip->rst = devm_reset_control_array_get_exclusive(dev);  in rockchip_pcie_reset_control_release()
190 	if (IS_ERR(rockchip->rst))  in rockchip_pcie_reset_control_release()
191 		return dev_err_probe(dev, PTR_ERR(rockchip->rst),  in rockchip_pcie_reset_control_release()
194 	return reset_control_deassert(rockchip->rst);  in rockchip_pcie_reset_control_release()
205 	struct rockchip_pcie *rockchip;  in rockchip_pcie_probe()  local
209 	rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);  in rockchip_pcie_probe()
210 	if (!rockchip)  in rockchip_pcie_probe()
213 	platform_set_drvdata(pdev, rockchip);  in rockchip_pcie_probe()
215 	rockchip->pci.dev = dev;  in rockchip_pcie_probe()
216 	rockchip->pci.ops = &dw_pcie_ops;  in rockchip_pcie_probe()
218 	pp = &rockchip->pci.pp;  in rockchip_pcie_probe()
221 	ret = rockchip_pcie_resource_get(pdev, rockchip);  in rockchip_pcie_probe()
226 	rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");  in rockchip_pcie_probe()
227 	if (IS_ERR(rockchip->vpcie3v3)) {  in rockchip_pcie_probe()
228 		if (PTR_ERR(rockchip->vpcie3v3) != -ENODEV)  in rockchip_pcie_probe()
229 			return dev_err_probe(dev, PTR_ERR(rockchip->vpcie3v3),  in rockchip_pcie_probe()
231 		rockchip->vpcie3v3 = NULL;  in rockchip_pcie_probe()
233 		ret = regulator_enable(rockchip->vpcie3v3);  in rockchip_pcie_probe()
240 	ret = rockchip_pcie_phy_init(rockchip);  in rockchip_pcie_probe()
244 	ret = rockchip_pcie_reset_control_release(rockchip);  in rockchip_pcie_probe()
248 	ret = rockchip_pcie_clk_init(rockchip);  in rockchip_pcie_probe()
256 	clk_bulk_disable_unprepare(rockchip->clk_cnt, rockchip->clks);  in rockchip_pcie_probe()
258 	rockchip_pcie_phy_deinit(rockchip);  in rockchip_pcie_probe()
260 	if (rockchip->vpcie3v3)  in rockchip_pcie_probe()
261 		regulator_disable(rockchip->vpcie3v3);  in rockchip_pcie_probe()
267 	{ .compatible = "rockchip,rk3568-pcie", },
273 		.name	= "rockchip-dw-pcie",