1 // SPDX-License-Identifier: GPL-2.0
7  * Copyright (C) 2010-2014 ST Microelectronics
17 #include <linux/pci.h>
18 #include <linux/phy/phy.h>
22 #include "pcie-designware.h"
25 	struct dw_pcie		*pci;  member
27 	struct phy		*phy;  member
67 #define to_spear13xx_pcie(x)	dev_get_drvdata((x)->dev)
69 static int spear13xx_pcie_start_link(struct dw_pcie *pci)  in spear13xx_pcie_start_link()  argument
71 	struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);  in spear13xx_pcie_start_link()
72 	struct pcie_app_reg __iomem *app_reg = spear13xx_pcie->app_base;  in spear13xx_pcie_start_link()
78 			&app_reg->app_ctrl_0);  in spear13xx_pcie_start_link()
86 	struct pcie_app_reg __iomem *app_reg = spear13xx_pcie->app_base;  in spear13xx_pcie_irq_handler()
87 	struct dw_pcie *pci = spear13xx_pcie->pci;  in spear13xx_pcie_irq_handler()  local
88 	struct dw_pcie_rp *pp = &pci->pp;  in spear13xx_pcie_irq_handler()
91 	status = readl(&app_reg->int_sts);  in spear13xx_pcie_irq_handler()
98 	writel(status, &app_reg->int_clr);  in spear13xx_pcie_irq_handler()
105 	struct pcie_app_reg __iomem *app_reg = spear13xx_pcie->app_base;  in spear13xx_pcie_enable_interrupts()
109 		writel(readl(&app_reg->int_mask) |  in spear13xx_pcie_enable_interrupts()
110 				MSI_CTRL_INT, &app_reg->int_mask);  in spear13xx_pcie_enable_interrupts()
113 static int spear13xx_pcie_link_up(struct dw_pcie *pci)  in spear13xx_pcie_link_up()  argument
115 	struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);  in spear13xx_pcie_link_up()
116 	struct pcie_app_reg __iomem *app_reg = spear13xx_pcie->app_base;  in spear13xx_pcie_link_up()
118 	if (readl(&app_reg->app_status_1) & XMLH_LINK_UP)  in spear13xx_pcie_link_up()
126 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);  in spear13xx_pcie_host_init()  local
127 	struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);  in spear13xx_pcie_host_init()
128 	u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);  in spear13xx_pcie_host_init()
131 	spear13xx_pcie->app_base = pci->dbi_base + 0x2000;  in spear13xx_pcie_host_init()
138 	val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL);  in spear13xx_pcie_host_init()
140 	dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL, val);  in spear13xx_pcie_host_init()
142 	dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, 0x104A);  in spear13xx_pcie_host_init()
143 	dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, 0xCD80);  in spear13xx_pcie_host_init()
157 	struct dw_pcie *pci = spear13xx_pcie->pci;  in spear13xx_add_pcie_port()  local
158 	struct dw_pcie_rp *pp = &pci->pp;  in spear13xx_add_pcie_port()
159 	struct device *dev = &pdev->dev;  in spear13xx_add_pcie_port()
162 	pp->irq = platform_get_irq(pdev, 0);  in spear13xx_add_pcie_port()
163 	if (pp->irq < 0)  in spear13xx_add_pcie_port()
164 		return pp->irq;  in spear13xx_add_pcie_port()
166 	ret = devm_request_irq(dev, pp->irq, spear13xx_pcie_irq_handler,  in spear13xx_add_pcie_port()
168 			       "spear1340-pcie", spear13xx_pcie);  in spear13xx_add_pcie_port()
170 		dev_err(dev, "failed to request irq %d\n", pp->irq);  in spear13xx_add_pcie_port()
174 	pp->ops = &spear13xx_pcie_host_ops;  in spear13xx_add_pcie_port()
175 	pp->msi_irq[0] = -ENODEV;  in spear13xx_add_pcie_port()
193 	struct device *dev = &pdev->dev;  in spear13xx_pcie_probe()
194 	struct dw_pcie *pci;  in spear13xx_pcie_probe()  local
196 	struct device_node *np = dev->of_node;  in spear13xx_pcie_probe()
201 		return -ENOMEM;  in spear13xx_pcie_probe()
203 	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);  in spear13xx_pcie_probe()
204 	if (!pci)  in spear13xx_pcie_probe()
205 		return -ENOMEM;  in spear13xx_pcie_probe()
207 	pci->dev = dev;  in spear13xx_pcie_probe()
208 	pci->ops = &dw_pcie_ops;  in spear13xx_pcie_probe()
210 	spear13xx_pcie->pci = pci;  in spear13xx_pcie_probe()
212 	spear13xx_pcie->phy = devm_phy_get(dev, "pcie-phy");  in spear13xx_pcie_probe()
213 	if (IS_ERR(spear13xx_pcie->phy)) {  in spear13xx_pcie_probe()
214 		ret = PTR_ERR(spear13xx_pcie->phy);  in spear13xx_pcie_probe()
215 		if (ret == -EPROBE_DEFER)  in spear13xx_pcie_probe()
218 			dev_err(dev, "couldn't get pcie-phy\n");  in spear13xx_pcie_probe()
222 	phy_init(spear13xx_pcie->phy);  in spear13xx_pcie_probe()
224 	spear13xx_pcie->clk = devm_clk_get(dev, NULL);  in spear13xx_pcie_probe()
225 	if (IS_ERR(spear13xx_pcie->clk)) {  in spear13xx_pcie_probe()
227 		return PTR_ERR(spear13xx_pcie->clk);  in spear13xx_pcie_probe()
229 	ret = clk_prepare_enable(spear13xx_pcie->clk);  in spear13xx_pcie_probe()
235 	if (of_property_read_bool(np, "st,pcie-is-gen1"))  in spear13xx_pcie_probe()
236 		pci->link_gen = 1;  in spear13xx_pcie_probe()
247 	clk_disable_unprepare(spear13xx_pcie->clk);  in spear13xx_pcie_probe()
253 	{ .compatible = "st,spear1340-pcie", },
260 		.name	= "spear-pcie",