Lines Matching +full:syscon +full:- +full:clk
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
9 #include <linux/clk.h>
15 #include <linux/mfd/syscon.h>
24 #include "pcie-cadence.h"
55 struct clk *refclk;
79 return readl(pcie->user_cfg_base + offset); in j721e_pcie_user_readl()
85 writel(value, pcie->user_cfg_base + offset); in j721e_pcie_user_writel()
90 return readl(pcie->intd_cfg_base + offset); in j721e_pcie_intd_readl()
96 writel(value, pcie->intd_cfg_base + offset); in j721e_pcie_intd_writel()
102 struct device *dev = pcie->dev; 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()
120 reg |= pcie->linkdown_irq_regfield; in j721e_pcie_config_link_irq()
126 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_start_link()
138 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_stop_link()
148 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); 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->dev; in j721e_pcie_set_mode()
170 u32 mode = pcie->mode; in j721e_pcie_set_mode()
177 ret = regmap_update_bits(syscon, offset, mask, val); in j721e_pcie_set_mode()
185 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_link_speed() argument
187 struct device *dev = pcie->dev; in j721e_pcie_set_link_speed()
188 struct device_node *np = dev->of_node; in j721e_pcie_set_link_speed()
197 val = link_speed - 1; in j721e_pcie_set_link_speed()
198 ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val); in j721e_pcie_set_link_speed()
206 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_lane_count() argument
208 struct device *dev = pcie->dev; in j721e_pcie_set_lane_count()
209 u32 lanes = pcie->num_lanes; in j721e_pcie_set_lane_count()
213 val = LANE_COUNT(lanes - 1); in j721e_pcie_set_lane_count()
214 ret = regmap_update_bits(syscon, offset, LANE_COUNT_MASK, val); in j721e_pcie_set_lane_count()
223 struct device *dev = pcie->dev; in j721e_pcie_ctrl_init()
224 struct device_node *node = dev->of_node; in j721e_pcie_ctrl_init()
227 struct regmap *syscon; in j721e_pcie_ctrl_init() local
230 syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl"); in j721e_pcie_ctrl_init()
231 if (IS_ERR(syscon)) { in j721e_pcie_ctrl_init()
232 dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n"); in j721e_pcie_ctrl_init()
233 return PTR_ERR(syscon); 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()
256 dev_err(dev, "Failed to set num-lanes\n"); in j721e_pcie_ctrl_init()
326 .compatible = "ti,j721e-pcie-host",
330 .compatible = "ti,j721e-pcie-ep",
334 .compatible = "ti,j7200-pcie-host",
338 .compatible = "ti,j7200-pcie-ep",
342 .compatible = "ti,am64-pcie-host",
346 .compatible = "ti,am64-pcie-ep",
354 struct device *dev = &pdev->dev; in j721e_pcie_probe()
355 struct device_node *node = dev->of_node; in j721e_pcie_probe()
364 struct clk *clk; in j721e_pcie_probe() local
372 return -EINVAL; in j721e_pcie_probe()
374 mode = (u32)data->mode; in j721e_pcie_probe()
378 return -ENOMEM; in j721e_pcie_probe()
380 pcie->dev = dev; in j721e_pcie_probe()
381 pcie->mode = mode; in j721e_pcie_probe()
382 pcie->linkdown_irq_regfield = data->linkdown_irq_regfield; in j721e_pcie_probe()
387 pcie->intd_cfg_base = base; in j721e_pcie_probe()
392 pcie->user_cfg_base = base; in j721e_pcie_probe()
394 ret = of_property_read_u32(node, "num-lanes", &num_lanes); in j721e_pcie_probe()
397 pcie->num_lanes = num_lanes; in j721e_pcie_probe()
400 return -EINVAL; in j721e_pcie_probe()
421 "j721e-pcie-link-down-irq", pcie); in j721e_pcie_probe()
432 ret = -ENODEV; in j721e_pcie_probe()
438 ret = -ENOMEM; in j721e_pcie_probe()
442 if (!data->byte_access_allowed) in j721e_pcie_probe()
443 bridge->ops = &cdns_ti_pcie_host_ops; in j721e_pcie_probe()
445 rc->quirk_retrain_flag = data->quirk_retrain_flag; in j721e_pcie_probe()
446 rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
448 cdns_pcie = &rc->pcie; in j721e_pcie_probe()
449 cdns_pcie->dev = dev; in j721e_pcie_probe()
450 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
451 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
456 if (ret != -EPROBE_DEFER) in j721e_pcie_probe()
467 clk = devm_clk_get_optional(dev, "pcie_refclk"); in j721e_pcie_probe()
468 if (IS_ERR(clk)) { in j721e_pcie_probe()
469 ret = PTR_ERR(clk); in j721e_pcie_probe()
474 ret = clk_prepare_enable(clk); in j721e_pcie_probe()
479 pcie->refclk = clk; in j721e_pcie_probe()
496 clk_disable_unprepare(pcie->refclk); in j721e_pcie_probe()
503 ret = -ENODEV; in j721e_pcie_probe()
509 ret = -ENOMEM; in j721e_pcie_probe()
512 ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
514 cdns_pcie = &ep->pcie; in j721e_pcie_probe()
515 cdns_pcie->dev = dev; in j721e_pcie_probe()
516 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
517 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
549 struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; in j721e_pcie_remove()
550 struct device *dev = &pdev->dev; in j721e_pcie_remove()
552 clk_disable_unprepare(pcie->refclk); in j721e_pcie_remove()
564 .name = "j721e-pcie",