3  * pci-j721e - PCIe controller driver for TI's J721E SoCs
24 #include "pcie-cadence.h"
77 static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset)  in j721e_pcie_user_readl()  argument
79 	return readl(pcie->user_cfg_base + offset);  in j721e_pcie_user_readl()
82 static inline void j721e_pcie_user_writel(struct j721e_pcie *pcie, u32 offset,  in j721e_pcie_user_writel()  argument
85 	writel(value, pcie->user_cfg_base + offset);  in j721e_pcie_user_writel()
88 static inline u32 j721e_pcie_intd_readl(struct j721e_pcie *pcie, u32 offset)  in j721e_pcie_intd_readl()  argument
90 	return readl(pcie->intd_cfg_base + offset);  in j721e_pcie_intd_readl()
93 static inline void j721e_pcie_intd_writel(struct j721e_pcie *pcie, u32 offset,  in j721e_pcie_intd_writel()  argument
96 	writel(value, pcie->intd_cfg_base + offset);  in j721e_pcie_intd_writel()
101 	struct j721e_pcie *pcie = priv;  in j721e_pcie_link_irq_handler()  local
102 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_link_irq_handler()
105 	reg = j721e_pcie_intd_readl(pcie, STATUS_REG_SYS_2);  in j721e_pcie_link_irq_handler()
106 	if (!(reg & pcie->linkdown_irq_regfield))  in j721e_pcie_link_irq_handler()
111 	j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, pcie->linkdown_irq_regfield);  in j721e_pcie_link_irq_handler()
115 static void j721e_pcie_config_link_irq(struct j721e_pcie *pcie)  in j721e_pcie_config_link_irq()  argument
119 	reg = j721e_pcie_intd_readl(pcie, ENABLE_REG_SYS_2);  in j721e_pcie_config_link_irq()
120 	reg |= pcie->linkdown_irq_regfield;  in j721e_pcie_config_link_irq()
121 	j721e_pcie_intd_writel(pcie, ENABLE_REG_SYS_2, reg);  in j721e_pcie_config_link_irq()
126 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_start_link()  local
129 	reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_CMD_STATUS);  in j721e_pcie_start_link()
131 	j721e_pcie_user_writel(pcie, J721E_PCIE_USER_CMD_STATUS, reg);  in j721e_pcie_start_link()
138 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_stop_link()  local
141 	reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_CMD_STATUS);  in j721e_pcie_stop_link()
143 	j721e_pcie_user_writel(pcie, J721E_PCIE_USER_CMD_STATUS, reg);  in j721e_pcie_stop_link()
148 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_link_up()  local
151 	reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_LINKSTATUS);  in j721e_pcie_link_up()
165 static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon,  in j721e_pcie_set_mode()  argument
168 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_mode()
170 	u32 mode = pcie->mode;  in j721e_pcie_set_mode()
179 		dev_err(dev, "failed to set pcie mode\n");  in j721e_pcie_set_mode()
184 static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,  in j721e_pcie_set_link_speed()  argument
187 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_link_speed()
205 static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,  in j721e_pcie_set_lane_count()  argument
208 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_lane_count()
209 	u32 lanes = pcie->num_lanes;  in j721e_pcie_set_lane_count()
221 static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)  in j721e_pcie_ctrl_init()  argument
223 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_ctrl_init()
230 	syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl");  in j721e_pcie_ctrl_init()
232 		dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n");  in j721e_pcie_ctrl_init()
237 	ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1,  in j721e_pcie_ctrl_init()
242 	ret = j721e_pcie_set_mode(pcie, syscon, offset);  in j721e_pcie_ctrl_init()
248 	ret = j721e_pcie_set_link_speed(pcie, syscon, offset);  in j721e_pcie_ctrl_init()
254 	ret = j721e_pcie_set_lane_count(pcie, syscon, offset);  in j721e_pcie_ctrl_init()
327 		.compatible = "ti,j721e-pcie-host",
331 		.compatible = "ti,j721e-pcie-ep",
335 		.compatible = "ti,j7200-pcie-host",
339 		.compatible = "ti,j7200-pcie-ep",
343 		.compatible = "ti,am64-pcie-host",
347 		.compatible = "ti,am64-pcie-ep",
360 	struct j721e_pcie *pcie;  in j721e_pcie_probe()  local
377 	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);  in j721e_pcie_probe()
378 	if (!pcie)  in j721e_pcie_probe()
396 		cdns_pcie = &rc->pcie;  in j721e_pcie_probe()
399 		pcie->cdns_pcie = cdns_pcie;  in j721e_pcie_probe()
412 		cdns_pcie = &ep->pcie;  in j721e_pcie_probe()
415 		pcie->cdns_pcie = cdns_pcie;  in j721e_pcie_probe()
422 	pcie->mode = mode;  in j721e_pcie_probe()
423 	pcie->linkdown_irq_regfield = data->linkdown_irq_regfield;  in j721e_pcie_probe()
428 	pcie->intd_cfg_base = base;  in j721e_pcie_probe()
433 	pcie->user_cfg_base = base;  in j721e_pcie_probe()
438 	pcie->num_lanes = num_lanes;  in j721e_pcie_probe()
447 	dev_set_drvdata(dev, pcie);  in j721e_pcie_probe()
455 	ret = j721e_pcie_ctrl_init(pcie);  in j721e_pcie_probe()
462 			       "j721e-pcie-link-down-irq", pcie);  in j721e_pcie_probe()
468 	j721e_pcie_config_link_irq(pcie);  in j721e_pcie_probe()
498 		pcie->refclk = clk;  in j721e_pcie_probe()
515 			clk_disable_unprepare(pcie->refclk);  in j721e_pcie_probe()
548 	struct j721e_pcie *pcie = platform_get_drvdata(pdev);  in j721e_pcie_remove()  local
549 	struct cdns_pcie *cdns_pcie = pcie->cdns_pcie;  in j721e_pcie_remove()
552 	clk_disable_unprepare(pcie->refclk);  in j721e_pcie_remove()
564 		.name	= "j721e-pcie",