1 // SPDX-License-Identifier: GPL-2.0
3  * pci-j721e - PCIe controller driver for TI's J721E SoCs
5  * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
23 #include "pcie-cadence.h"
77 	return readl(pcie->user_cfg_base + offset);  in j721e_pcie_user_readl()
83 	writel(value, pcie->user_cfg_base + offset);  in j721e_pcie_user_writel()
88 	return readl(pcie->intd_cfg_base + offset);  in j721e_pcie_intd_readl()
94 	writel(value, pcie->intd_cfg_base + offset);  in j721e_pcie_intd_writel()
100 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_link_irq_handler()
104 	if (!(reg & pcie->linkdown_irq_regfield))  in j721e_pcie_link_irq_handler()
109 	j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, pcie->linkdown_irq_regfield);  in j721e_pcie_link_irq_handler()
118 	reg |= pcie->linkdown_irq_regfield;  in j721e_pcie_config_link_irq()
124 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_start_link()
136 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_stop_link()
146 	struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);  in j721e_pcie_link_up()
166 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_mode()
168 	u32 mode = pcie->mode;  in j721e_pcie_set_mode()
185 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_link_speed()
186 	struct device_node *np = dev->of_node;  in j721e_pcie_set_link_speed()
195 	val = link_speed - 1;  in j721e_pcie_set_link_speed()
206 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_set_lane_count()
207 	u32 lanes = pcie->num_lanes;  in j721e_pcie_set_lane_count()  local
212 	if (pcie->max_lanes == 4)  in j721e_pcie_set_lane_count()
215 	val = LANE_COUNT(lanes - 1);  in j721e_pcie_set_lane_count()
225 	struct device *dev = pcie->cdns_pcie->dev;  in j721e_pcie_ctrl_init()
226 	struct device_node *node = dev->of_node;  in j721e_pcie_ctrl_init()
232 	syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl");  in j721e_pcie_ctrl_init()
234 		dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n");  in j721e_pcie_ctrl_init()
239 	ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1,  in j721e_pcie_ctrl_init()
258 		dev_err(dev, "Failed to set num-lanes\n");  in j721e_pcie_ctrl_init()
349 		.compatible = "ti,j721e-pcie-host",
353 		.compatible = "ti,j721e-pcie-ep",
357 		.compatible = "ti,j7200-pcie-host",
361 		.compatible = "ti,j7200-pcie-ep",
365 		.compatible = "ti,am64-pcie-host",
369 		.compatible = "ti,am64-pcie-ep",
373 		.compatible = "ti,j784s4-pcie-host",
377 		.compatible = "ti,j784s4-pcie-ep",
385 	struct device *dev = &pdev->dev;  in j721e_pcie_probe()
386 	struct device_node *node = dev->of_node;  in j721e_pcie_probe()
403 		return -EINVAL;  in j721e_pcie_probe()
405 	mode = (u32)data->mode;  in j721e_pcie_probe()
409 		return -ENOMEM;  in j721e_pcie_probe()
414 			return -ENODEV;  in j721e_pcie_probe()
418 			return -ENOMEM;  in j721e_pcie_probe()
420 		if (!data->byte_access_allowed)  in j721e_pcie_probe()
421 			bridge->ops = &cdns_ti_pcie_host_ops;  in j721e_pcie_probe()
423 		rc->quirk_retrain_flag = data->quirk_retrain_flag;  in j721e_pcie_probe()
424 		rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag;  in j721e_pcie_probe()
426 		cdns_pcie = &rc->pcie;  in j721e_pcie_probe()
427 		cdns_pcie->dev = dev;  in j721e_pcie_probe()
428 		cdns_pcie->ops = &j721e_pcie_ops;  in j721e_pcie_probe()
429 		pcie->cdns_pcie = cdns_pcie;  in j721e_pcie_probe()
433 			return -ENODEV;  in j721e_pcie_probe()
437 			return -ENOMEM;  in j721e_pcie_probe()
439 		ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag;  in j721e_pcie_probe()
440 		ep->quirk_disable_flr = data->quirk_disable_flr;  in j721e_pcie_probe()
442 		cdns_pcie = &ep->pcie;  in j721e_pcie_probe()
443 		cdns_pcie->dev = dev;  in j721e_pcie_probe()
444 		cdns_pcie->ops = &j721e_pcie_ops;  in j721e_pcie_probe()
445 		pcie->cdns_pcie = cdns_pcie;  in j721e_pcie_probe()
452 	pcie->mode = mode;  in j721e_pcie_probe()
453 	pcie->linkdown_irq_regfield = data->linkdown_irq_regfield;  in j721e_pcie_probe()
458 	pcie->intd_cfg_base = base;  in j721e_pcie_probe()
463 	pcie->user_cfg_base = base;  in j721e_pcie_probe()
465 	ret = of_property_read_u32(node, "num-lanes", &num_lanes);  in j721e_pcie_probe()
466 	if (ret || num_lanes > data->max_lanes) {  in j721e_pcie_probe()
467 		dev_warn(dev, "num-lanes property not provided or invalid, setting num-lanes to 1\n");  in j721e_pcie_probe()
471 	pcie->num_lanes = num_lanes;  in j721e_pcie_probe()
472 	pcie->max_lanes = data->max_lanes;  in j721e_pcie_probe()
475 		return -EINVAL;  in j721e_pcie_probe()
496 			       "j721e-pcie-link-down-irq", pcie);  in j721e_pcie_probe()
509 			if (ret != -EPROBE_DEFER)  in j721e_pcie_probe()
532 		pcie->refclk = clk;  in j721e_pcie_probe()
549 			clk_disable_unprepare(pcie->refclk);  in j721e_pcie_probe()
583 	struct cdns_pcie *cdns_pcie = pcie->cdns_pcie;  in j721e_pcie_remove()
584 	struct device *dev = &pdev->dev;  in j721e_pcie_remove()
586 	clk_disable_unprepare(pcie->refclk);  in j721e_pcie_remove()
596 		.name	= "j721e-pcie",