Lines Matching +full:syscon +full:- +full:pcie +full:- +full:ctrl
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
15 #include <linux/mfd/syscon.h>
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()
177 ret = regmap_update_bits(syscon, offset, mask, val); 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
185 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_link_speed() argument
187 struct device *dev = pcie->cdns_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()
205 static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie, in j721e_pcie_set_lane_count() argument
206 struct regmap *syscon, unsigned int offset) 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()
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()
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()
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()
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",
355 struct device *dev = &pdev->dev; in j721e_pcie_probe()
356 struct device_node *node = dev->of_node; in j721e_pcie_probe()
360 struct j721e_pcie *pcie; in j721e_pcie_probe() local
373 return -EINVAL; in j721e_pcie_probe()
375 mode = (u32)data->mode; in j721e_pcie_probe()
377 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); in j721e_pcie_probe()
378 if (!pcie) in j721e_pcie_probe()
379 return -ENOMEM; in j721e_pcie_probe()
384 return -ENODEV; in j721e_pcie_probe()
388 return -ENOMEM; in j721e_pcie_probe()
390 if (!data->byte_access_allowed) in j721e_pcie_probe()
391 bridge->ops = &cdns_ti_pcie_host_ops; in j721e_pcie_probe()
393 rc->quirk_retrain_flag = data->quirk_retrain_flag; in j721e_pcie_probe()
394 rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
396 cdns_pcie = &rc->pcie; in j721e_pcie_probe()
397 cdns_pcie->dev = dev; in j721e_pcie_probe()
398 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
399 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
403 return -ENODEV; in j721e_pcie_probe()
407 return -ENOMEM; in j721e_pcie_probe()
409 ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
410 ep->quirk_disable_flr = data->quirk_disable_flr; in j721e_pcie_probe()
412 cdns_pcie = &ep->pcie; in j721e_pcie_probe()
413 cdns_pcie->dev = dev; in j721e_pcie_probe()
414 cdns_pcie->ops = &j721e_pcie_ops; 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()
435 ret = of_property_read_u32(node, "num-lanes", &num_lanes); in j721e_pcie_probe()
438 pcie->num_lanes = num_lanes; in j721e_pcie_probe()
441 return -EINVAL; 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()
475 if (ret != -EPROBE_DEFER) 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()
550 struct device *dev = &pdev->dev; in j721e_pcie_remove()
552 clk_disable_unprepare(pcie->refclk); in j721e_pcie_remove()
564 .name = "j721e-pcie",