1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (C) 2019-2021 SiFive, Inc.
30 #include "pcie-designware.h"
32 #define to_fu740_pcie(x)	dev_get_drvdata((x)->dev)
85 	gpiod_set_value_cansleep(afp->reset, 0);  in fu740_pcie_assert_reset()
87 	writel_relaxed(0x0, afp->mgmt_base + PCIEX8MGMT_PERST_N);  in fu740_pcie_assert_reset()
93 	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PERST_N);  in fu740_pcie_deassert_reset()
95 	gpiod_set_value_cansleep(afp->reset, 1);  in fu740_pcie_deassert_reset()
100 	gpiod_set_value_cansleep(afp->pwren, 1);  in fu740_pcie_power_on()
119 	struct device *dev = afp->pci.dev;  in fu740_phyregwrite()
128 		phy_cr_para_addr = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_ADDR;  in fu740_phyregwrite()
129 		phy_cr_para_wr_data = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_WR_DATA;  in fu740_phyregwrite()
130 		phy_cr_para_wr_en = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_WR_EN;  in fu740_phyregwrite()
131 		phy_cr_para_ack = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_ACK;  in fu740_phyregwrite()
133 		phy_cr_para_addr = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_ADDR;  in fu740_phyregwrite()
134 		phy_cr_para_wr_data = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_WR_DATA;  in fu740_phyregwrite()
135 		phy_cr_para_wr_en = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_WR_EN;  in fu740_phyregwrite()
136 		phy_cr_para_ack = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_ACK;  in fu740_phyregwrite()
160 	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_SEL);  in fu740_pcie_init_phy()
161 	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_SEL);  in fu740_pcie_init_phy()
169 	/* Set PHY AC termination mode */  in fu740_pcie_init_phy()
182 	struct device *dev = pci->dev;  in fu740_pcie_start_link()
186 	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_APP_LTSSM_ENABLE);  in fu740_pcie_start_link()
194 	struct device *dev = pci->dev;  in fu740_pcie_host_init()
201 	ret = clk_prepare_enable(afp->pcie_aux);  in fu740_pcie_host_init()
211 	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_APP_HOLD_PHY_RST);  in fu740_pcie_host_init()
214 	ret = reset_control_deassert(afp->rst);  in fu740_pcie_host_init()
223 	clk_disable_unprepare(afp->pcie_aux);  in fu740_pcie_host_init()
225 	writel_relaxed(0x0, afp->mgmt_base + PCIEX8MGMT_APP_HOLD_PHY_RST);  in fu740_pcie_host_init()
227 	ret = clk_prepare_enable(afp->pcie_aux);  in fu740_pcie_host_init()
229 	writel_relaxed(0x4, afp->mgmt_base + PCIEX8MGMT_DEVICE_TYPE);  in fu740_pcie_host_init()
244 	struct device *dev = &pdev->dev;  in fu740_pcie_probe()
250 		return -ENOMEM;  in fu740_pcie_probe()
251 	pci = &afp->pci;  in fu740_pcie_probe()
252 	pci->dev = dev;  in fu740_pcie_probe()
253 	pci->ops = &dw_pcie_ops;  in fu740_pcie_probe()
254 	pci->pp.ops = &fu740_pcie_host_ops;  in fu740_pcie_probe()
257 	afp->mgmt_base = devm_platform_ioremap_resource_byname(pdev, "mgmt");  in fu740_pcie_probe()
258 	if (IS_ERR(afp->mgmt_base))  in fu740_pcie_probe()
259 		return PTR_ERR(afp->mgmt_base);  in fu740_pcie_probe()
261 	/* Fetch GPIOs */  in fu740_pcie_probe()
262 	afp->reset = devm_gpiod_get_optional(dev, "reset-gpios", GPIOD_OUT_LOW);  in fu740_pcie_probe()
263 	if (IS_ERR(afp->reset))  in fu740_pcie_probe()
264 		return dev_err_probe(dev, PTR_ERR(afp->reset), "unable to get reset-gpios\n");  in fu740_pcie_probe()
266 	afp->pwren = devm_gpiod_get_optional(dev, "pwren-gpios", GPIOD_OUT_LOW);  in fu740_pcie_probe()
267 	if (IS_ERR(afp->pwren))  in fu740_pcie_probe()
268 		return dev_err_probe(dev, PTR_ERR(afp->pwren), "unable to get pwren-gpios\n");  in fu740_pcie_probe()
271 	afp->pcie_aux = devm_clk_get(dev, "pcie_aux");  in fu740_pcie_probe()
272 	if (IS_ERR(afp->pcie_aux))  in fu740_pcie_probe()
273 		return dev_err_probe(dev, PTR_ERR(afp->pcie_aux),  in fu740_pcie_probe()
277 	afp->rst = devm_reset_control_get_exclusive(dev, NULL);  in fu740_pcie_probe()
278 	if (IS_ERR(afp->rst))  in fu740_pcie_probe()
279 		return dev_err_probe(dev, PTR_ERR(afp->rst), "unable to get reset\n");  in fu740_pcie_probe()
283 	return dw_pcie_host_init(&pci->pp);  in fu740_pcie_probe()
295 	{ .compatible = "sifive,fu740-pcie", },
301 		   .name = "fu740-pcie",