1 // SPDX-License-Identifier: GPL-2.0
17 #include <linux/pci.h>
23 #include "pcie-designware.h"
34 #define PCIE_ABSERR_SETTING	0x9401 /* Forward error of non-posted request */
47 	struct dw_pcie *pci;  member
54 #define to_ls_pcie(x)	dev_get_drvdata((x)->dev)
58 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_is_bridge()  local
61 	header_type = ioread8(pci->dbi_base + PCI_HEADER_TYPE);  in ls_pcie_is_bridge()
67 /* Clear multi-function bit */
70 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_clear_multifunction()  local
72 	iowrite8(PCI_HEADER_TYPE_BRIDGE, pci->dbi_base + PCI_HEADER_TYPE);  in ls_pcie_clear_multifunction()
79 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_drop_msg_tlp()  local
81 	val = ioread32(pci->dbi_base + PCIE_STRFMR1);  in ls_pcie_drop_msg_tlp()
83 	iowrite32(val, pci->dbi_base + PCIE_STRFMR1);  in ls_pcie_drop_msg_tlp()
91 		dw_pcie_disable_atu(pcie->pci, i, DW_PCIE_REGION_OUTBOUND);  in ls_pcie_disable_outbound_atus()
94 static int ls1021_pcie_link_up(struct dw_pcie *pci)  in ls1021_pcie_link_up()  argument
97 	struct ls_pcie *pcie = to_ls_pcie(pci);  in ls1021_pcie_link_up()
99 	if (!pcie->scfg)  in ls1021_pcie_link_up()
102 	regmap_read(pcie->scfg, SCFG_PEXMSCPORTSR(pcie->index), &state);  in ls1021_pcie_link_up()
111 static int ls_pcie_link_up(struct dw_pcie *pci)  in ls_pcie_link_up()  argument
113 	struct ls_pcie *pcie = to_ls_pcie(pci);  in ls_pcie_link_up()
116 	state = (ioread32(pcie->lut + pcie->drvdata->lut_dbg) >>  in ls_pcie_link_up()
117 		 pcie->drvdata->ltssm_shift) &  in ls_pcie_link_up()
126 /* Forward error response of outbound non-posted requests */
129 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_fix_error_response()  local
131 	iowrite32(PCIE_ABSERR_SETTING, pci->dbi_base + PCIE_ABSERR);  in ls_pcie_fix_error_response()
136 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);  in ls_pcie_host_init()  local
137 	struct ls_pcie *pcie = to_ls_pcie(pci);  in ls_pcie_host_init()
147 	dw_pcie_dbi_ro_wr_en(pci);  in ls_pcie_host_init()
149 	dw_pcie_dbi_ro_wr_dis(pci);  in ls_pcie_host_init()
160 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);  in ls1021_pcie_host_init()  local
161 	struct ls_pcie *pcie = to_ls_pcie(pci);  in ls1021_pcie_host_init()
162 	struct device *dev = pci->dev;  in ls1021_pcie_host_init()  local
166 	pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node,  in ls1021_pcie_host_init()
167 						     "fsl,pcie-scfg");  in ls1021_pcie_host_init()
168 	if (IS_ERR(pcie->scfg)) {  in ls1021_pcie_host_init()
169 		ret = PTR_ERR(pcie->scfg);  in ls1021_pcie_host_init()
170 		dev_err(dev, "No syscfg phandle specified\n");  in ls1021_pcie_host_init()
171 		pcie->scfg = NULL;  in ls1021_pcie_host_init()
175 	if (of_property_read_u32_array(dev->of_node,  in ls1021_pcie_host_init()
176 				       "fsl,pcie-scfg", index, 2)) {  in ls1021_pcie_host_init()
177 		pcie->scfg = NULL;  in ls1021_pcie_host_init()
178 		return -EINVAL;  in ls1021_pcie_host_init()
180 	pcie->index = index[1];  in ls1021_pcie_host_init()
187 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);  in ls_pcie_msi_host_init()  local
188 	struct device *dev = pci->dev;  in ls_pcie_msi_host_init()  local
189 	struct device_node *np = dev->of_node;  in ls_pcie_msi_host_init()
196 	 * requirement that "msi-parent" exists.  in ls_pcie_msi_host_init()
198 	msi_node = of_parse_phandle(np, "msi-parent", 0);  in ls_pcie_msi_host_init()
200 		dev_err(dev, "failed to find msi-parent\n");  in ls_pcie_msi_host_init()
201 		return -EINVAL;  in ls_pcie_msi_host_init()
264 	{ .compatible = "fsl,ls1012a-pcie", .data = &ls1046_drvdata },
265 	{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021_drvdata },
266 	{ .compatible = "fsl,ls1028a-pcie", .data = &ls2088_drvdata },
267 	{ .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
268 	{ .compatible = "fsl,ls1046a-pcie", .data = &ls1046_drvdata },
269 	{ .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
270 	{ .compatible = "fsl,ls2085a-pcie", .data = &ls2080_drvdata },
271 	{ .compatible = "fsl,ls2088a-pcie", .data = &ls2088_drvdata },
272 	{ .compatible = "fsl,ls1088a-pcie", .data = &ls2088_drvdata },
278 	struct dw_pcie *pci = pcie->pci;  in ls_add_pcie_port()  local
279 	struct pcie_port *pp = &pci->pp;  in ls_add_pcie_port()
280 	struct device *dev = pci->dev;  in ls_add_pcie_port()  local
283 	pp->ops = pcie->drvdata->ops;  in ls_add_pcie_port()
287 		dev_err(dev, "failed to initialize host\n");  in ls_add_pcie_port()
296 	struct device *dev = &pdev->dev;  in ls_pcie_probe()  local
297 	struct dw_pcie *pci;  in ls_pcie_probe()  local
302 	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);  in ls_pcie_probe()
304 		return -ENOMEM;  in ls_pcie_probe()
306 	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);  in ls_pcie_probe()
307 	if (!pci)  in ls_pcie_probe()
308 		return -ENOMEM;  in ls_pcie_probe()
310 	pcie->drvdata = of_device_get_match_data(dev);  in ls_pcie_probe()
312 	pci->dev = dev;  in ls_pcie_probe()
313 	pci->ops = pcie->drvdata->dw_pcie_ops;  in ls_pcie_probe()
315 	pcie->pci = pci;  in ls_pcie_probe()
318 	pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);  in ls_pcie_probe()
319 	if (IS_ERR(pci->dbi_base))  in ls_pcie_probe()
320 		return PTR_ERR(pci->dbi_base);  in ls_pcie_probe()
322 	pcie->lut = pci->dbi_base + pcie->drvdata->lut_offset;  in ls_pcie_probe()
325 		return -ENODEV;  in ls_pcie_probe()
338 		.name = "layerscape-pcie",