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>
10 #include <linux/clk-provider.h>
17 #include <linux/mfd/syscon.h>
25 #include "pcie-cadence.h"
56 struct clk *refclk;
83 return readl(pcie->user_cfg_base + offset); in j721e_pcie_user_readl()
89 writel(value, pcie->user_cfg_base + offset); in j721e_pcie_user_writel()
94 return readl(pcie->intd_cfg_base + offset); in j721e_pcie_intd_readl()
100 writel(value, pcie->intd_cfg_base + offset); in j721e_pcie_intd_writel()
106 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_link_irq_handler()
110 if (!(reg & pcie->linkdown_irq_regfield)) in j721e_pcie_link_irq_handler()
115 j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, pcie->linkdown_irq_regfield); in j721e_pcie_link_irq_handler()
124 reg |= pcie->linkdown_irq_regfield; in j721e_pcie_config_link_irq()
130 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_start_link()
142 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_stop_link()
152 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_link_up()
169 static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon, in j721e_pcie_set_mode() argument
172 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_mode()
174 u32 mode = pcie->mode; in j721e_pcie_set_mode()
181 ret = regmap_update_bits(syscon, offset, mask, val); in j721e_pcie_set_mode()
189 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_link_speed() argument
191 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_link_speed()
192 struct device_node *np = dev->of_node; in j721e_pcie_set_link_speed()
201 val = link_speed - 1; in j721e_pcie_set_link_speed()
202 ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val); in j721e_pcie_set_link_speed()
210 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_lane_count() argument
212 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_lane_count()
213 u32 lanes = pcie->num_lanes; in j721e_pcie_set_lane_count()
218 if (pcie->max_lanes == 4) in j721e_pcie_set_lane_count()
221 val = LANE_COUNT(lanes - 1); in j721e_pcie_set_lane_count()
222 ret = regmap_update_bits(syscon, offset, mask, val); in j721e_pcie_set_lane_count()
230 struct regmap *syscon) in j721e_enable_acspcie_refclk() argument
232 struct device *dev = pcie->cdns_pcie->dev; in j721e_enable_acspcie_refclk()
233 struct device_node *node = dev->of_node; in j721e_enable_acspcie_refclk()
240 "ti,syscon-acspcie-proxy-ctrl", in j721e_enable_acspcie_refclk()
244 "ti,syscon-acspcie-proxy-ctrl has invalid arguments\n"); in j721e_enable_acspcie_refclk()
250 ret = regmap_update_bits(syscon, 0, mask, val); in j721e_enable_acspcie_refclk()
261 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_ctrl_init()
262 struct device_node *node = dev->of_node; in j721e_pcie_ctrl_init()
265 struct regmap *syscon; in j721e_pcie_ctrl_init() local
268 syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl"); in j721e_pcie_ctrl_init()
269 if (IS_ERR(syscon)) { in j721e_pcie_ctrl_init()
270 dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n"); in j721e_pcie_ctrl_init()
271 return PTR_ERR(syscon); in j721e_pcie_ctrl_init()
275 ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1, in j721e_pcie_ctrl_init()
280 ret = j721e_pcie_set_mode(pcie, syscon, offset); in j721e_pcie_ctrl_init()
286 ret = j721e_pcie_set_link_speed(pcie, syscon, offset); in j721e_pcie_ctrl_init()
292 ret = j721e_pcie_set_lane_count(pcie, syscon, offset); in j721e_pcie_ctrl_init()
294 dev_err(dev, "Failed to set num-lanes\n"); in j721e_pcie_ctrl_init()
299 syscon = syscon_regmap_lookup_by_phandle_optional(node, in j721e_pcie_ctrl_init()
300 "ti,syscon-acspcie-proxy-ctrl"); in j721e_pcie_ctrl_init()
301 if (!syscon) in j721e_pcie_ctrl_init()
304 return j721e_enable_acspcie_refclk(pcie, syscon); in j721e_pcie_ctrl_init()
399 .compatible = "ti,j721e-pcie-host",
403 .compatible = "ti,j721e-pcie-ep",
407 .compatible = "ti,j7200-pcie-host",
411 .compatible = "ti,j7200-pcie-ep",
415 .compatible = "ti,am64-pcie-host",
419 .compatible = "ti,am64-pcie-ep",
423 .compatible = "ti,j784s4-pcie-host",
427 .compatible = "ti,j784s4-pcie-ep",
431 .compatible = "ti,j722s-pcie-host",
439 struct device *dev = &pdev->dev; in j721e_pcie_probe()
440 struct device_node *node = dev->of_node; in j721e_pcie_probe()
449 struct clk *clk; in j721e_pcie_probe() local
457 return -EINVAL; in j721e_pcie_probe()
459 mode = (u32)data->mode; in j721e_pcie_probe()
463 return -ENOMEM; in j721e_pcie_probe()
468 return -ENODEV; in j721e_pcie_probe()
472 return -ENOMEM; in j721e_pcie_probe()
474 if (!data->byte_access_allowed) in j721e_pcie_probe()
475 bridge->ops = &cdns_ti_pcie_host_ops; in j721e_pcie_probe()
477 rc->quirk_retrain_flag = data->quirk_retrain_flag; in j721e_pcie_probe()
478 rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
480 cdns_pcie = &rc->pcie; in j721e_pcie_probe()
481 cdns_pcie->dev = dev; in j721e_pcie_probe()
482 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
483 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
487 return -ENODEV; in j721e_pcie_probe()
491 return -ENOMEM; in j721e_pcie_probe()
493 ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
494 ep->quirk_disable_flr = data->quirk_disable_flr; in j721e_pcie_probe()
496 cdns_pcie = &ep->pcie; in j721e_pcie_probe()
497 cdns_pcie->dev = dev; in j721e_pcie_probe()
498 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
499 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
506 pcie->mode = mode; in j721e_pcie_probe()
507 pcie->linkdown_irq_regfield = data->linkdown_irq_regfield; in j721e_pcie_probe()
512 pcie->intd_cfg_base = base; in j721e_pcie_probe()
517 pcie->user_cfg_base = base; in j721e_pcie_probe()
519 ret = of_property_read_u32(node, "num-lanes", &num_lanes); in j721e_pcie_probe()
520 if (ret || num_lanes > data->max_lanes) { in j721e_pcie_probe()
521 dev_warn(dev, "num-lanes property not provided or invalid, setting num-lanes to 1\n"); in j721e_pcie_probe()
525 pcie->num_lanes = num_lanes; in j721e_pcie_probe()
526 pcie->max_lanes = data->max_lanes; in j721e_pcie_probe()
529 return -EINVAL; in j721e_pcie_probe()
550 "j721e-pcie-link-down-irq", pcie); in j721e_pcie_probe()
565 pcie->reset_gpio = gpiod; in j721e_pcie_probe()
573 clk = devm_clk_get_optional(dev, "pcie_refclk"); in j721e_pcie_probe()
574 if (IS_ERR(clk)) { in j721e_pcie_probe()
575 ret = dev_err_probe(dev, PTR_ERR(clk), "failed to get pcie_refclk\n"); in j721e_pcie_probe()
579 ret = clk_prepare_enable(clk); in j721e_pcie_probe()
584 pcie->refclk = clk; in j721e_pcie_probe()
600 clk_disable_unprepare(pcie->refclk); in j721e_pcie_probe()
634 struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; in j721e_pcie_remove()
635 struct device *dev = &pdev->dev; in j721e_pcie_remove()
637 clk_disable_unprepare(pcie->refclk); in j721e_pcie_remove()
647 if (pcie->mode == PCI_MODE_RC) { in j721e_pcie_suspend_noirq()
648 gpiod_set_value_cansleep(pcie->reset_gpio, 0); in j721e_pcie_suspend_noirq()
649 clk_disable_unprepare(pcie->refclk); in j721e_pcie_suspend_noirq()
652 cdns_pcie_disable_phy(pcie->cdns_pcie); in j721e_pcie_suspend_noirq()
660 struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; in j721e_pcie_resume_noirq()
673 ret = cdns_pcie_enable_phy(pcie->cdns_pcie); in j721e_pcie_resume_noirq()
677 if (pcie->mode == PCI_MODE_RC) { in j721e_pcie_resume_noirq()
680 ret = clk_prepare_enable(pcie->refclk); in j721e_pcie_resume_noirq()
691 if (pcie->reset_gpio) { in j721e_pcie_resume_noirq()
693 gpiod_set_value_cansleep(pcie->reset_gpio, 1); in j721e_pcie_resume_noirq()
698 clk_disable_unprepare(pcie->refclk); in j721e_pcie_resume_noirq()
707 rc->avail_ib_bar[bar] = true; in j721e_pcie_resume_noirq()
711 clk_disable_unprepare(pcie->refclk); in j721e_pcie_resume_noirq()
727 .name = "j721e-pcie",