1 // SPDX-License-Identifier: GPL-2.0
26 #include "pcie-designware.h"
31 #define PCIE_ABSERR_SETTING	0x9401 /* Forward error of non-posted request */
46 #define PEXPME(idx)		BIT(31 - (idx) * 4)
73 #define to_ls_pcie(x)	dev_get_drvdata((x)->dev)
77 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_is_bridge()
80 	header_type = ioread8(pci->dbi_base + PCI_HEADER_TYPE);  in ls_pcie_is_bridge()
86 /* Clear multi-function bit */
89 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_clear_multifunction()
91 	iowrite8(PCI_HEADER_TYPE_BRIDGE, pci->dbi_base + PCI_HEADER_TYPE);  in ls_pcie_clear_multifunction()
98 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_drop_msg_tlp()
100 	val = ioread32(pci->dbi_base + PCIE_STRFMR1);  in ls_pcie_drop_msg_tlp()
102 	iowrite32(val, pci->dbi_base + PCIE_STRFMR1);  in ls_pcie_drop_msg_tlp()
105 /* Forward error response of outbound non-posted requests */
108 	struct dw_pcie *pci = pcie->pci;  in ls_pcie_fix_error_response()
110 	iowrite32(PCIE_ABSERR_SETTING, pci->dbi_base + PCIE_ABSERR);  in ls_pcie_fix_error_response()
115 	if (pcie->big_endian)  in ls_pcie_pf_lut_readl()
116 		return ioread32be(pcie->pf_lut_base + off);  in ls_pcie_pf_lut_readl()
118 	return ioread32(pcie->pf_lut_base + off);  in ls_pcie_pf_lut_readl()
123 	if (pcie->big_endian)  in ls_pcie_pf_lut_writel()
124 		iowrite32be(val, pcie->pf_lut_base + off);  in ls_pcie_pf_lut_writel()
126 		iowrite32(val, pcie->pf_lut_base + off);  in ls_pcie_pf_lut_writel()
145 		dev_err(pcie->pci->dev, "PME_Turn_off timeout\n");  in ls_pcie_send_turnoff_msg()
172 		dev_err(pcie->pci->dev, "L2 exit timeout\n");  in ls_pcie_exit_from_l2()
216 	scfg_pcie_send_turnoff_msg(pcie->scfg, SCFG_PEXPMWRCR(pcie->index), PMXMTTURNOFF);  in ls1021a_pcie_send_turnoff_msg()
221 	/* Reset the PEX wrapper to bring the link out of L2 */  in scfg_pcie_exit_from_l2()
233 	return scfg_pcie_exit_from_l2(pcie->scfg, SCFG_PEXSFTRSTCR, PEXSR(pcie->index));  in ls1021a_pcie_exit_from_l2()
241 	scfg_pcie_send_turnoff_msg(pcie->scfg, SCFG_PEXPMECR, PEXPME(pcie->index));  in ls1043a_pcie_send_turnoff_msg()
251 	 * Reset the PEX wrapper to bring the link out of L2.  in ls1043a_pcie_exit_from_l2()
253 	 *	    clearing the soft reset on the PEX module.  in ls1043a_pcie_exit_from_l2()
254 	 * LDBG_SR: When SR is set to 1, the PEX module enters soft reset.  in ls1043a_pcie_exit_from_l2()
313 	{ .compatible = "fsl,ls1012a-pcie", .data = &layerscape_drvdata },
314 	{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021a_drvdata },
315 	{ .compatible = "fsl,ls1028a-pcie", .data = &layerscape_drvdata },
316 	{ .compatible = "fsl,ls1043a-pcie", .data = &ls1043a_drvdata },
317 	{ .compatible = "fsl,ls1046a-pcie", .data = &layerscape_drvdata },
318 	{ .compatible = "fsl,ls2080a-pcie", .data = &layerscape_drvdata },
319 	{ .compatible = "fsl,ls2085a-pcie", .data = &layerscape_drvdata },
320 	{ .compatible = "fsl,ls2088a-pcie", .data = &layerscape_drvdata },
321 	{ .compatible = "fsl,ls1088a-pcie", .data = &layerscape_drvdata },
327 	struct device *dev = &pdev->dev;  in ls_pcie_probe()
335 		return -ENOMEM;  in ls_pcie_probe()
339 		return -ENOMEM;  in ls_pcie_probe()
341 	pcie->drvdata = of_device_get_match_data(dev);  in ls_pcie_probe()
343 	pci->dev = dev;  in ls_pcie_probe()
344 	pcie->pci = pci;  in ls_pcie_probe()
345 	pci->pp.ops = pcie->drvdata->ops;  in ls_pcie_probe()
348 	pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);  in ls_pcie_probe()
349 	if (IS_ERR(pci->dbi_base))  in ls_pcie_probe()
350 		return PTR_ERR(pci->dbi_base);  in ls_pcie_probe()
352 	pcie->big_endian = of_property_read_bool(dev->of_node, "big-endian");  in ls_pcie_probe()
354 	pcie->pf_lut_base = pci->dbi_base + pcie->drvdata->pf_lut_off;  in ls_pcie_probe()
356 	if (pcie->drvdata->scfg_support) {  in ls_pcie_probe()
357 		pcie->scfg =  in ls_pcie_probe()
358 			syscon_regmap_lookup_by_phandle_args(dev->of_node,  in ls_pcie_probe()
359 							     "fsl,pcie-scfg", 1,  in ls_pcie_probe()
361 		if (IS_ERR(pcie->scfg)) {  in ls_pcie_probe()
363 			return PTR_ERR(pcie->scfg);  in ls_pcie_probe()
366 		pcie->index = index[1];  in ls_pcie_probe()
370 		return -ENODEV;  in ls_pcie_probe()
374 	return dw_pcie_host_init(&pci->pp);  in ls_pcie_probe()
381 	if (!pcie->drvdata->pm_support)  in ls_pcie_suspend_noirq()
384 	return dw_pcie_suspend_noirq(pcie->pci);  in ls_pcie_suspend_noirq()
392 	if (!pcie->drvdata->pm_support)  in ls_pcie_resume_noirq()
395 	ret = pcie->drvdata->exit_from_l2(&pcie->pci->pp);  in ls_pcie_resume_noirq()
399 	return dw_pcie_resume_noirq(pcie->pci);  in ls_pcie_resume_noirq()
409 		.name = "layerscape-pcie",