pci/controller/pcie-rcar-ep.c

17 #include "pcie-rcar.h"
23 	struct rcar_pcie	pcie;
33 static void rcar_pcie_ep_hw_init(struct rcar_pcie *pcie)
37 	rcar_pci_write_reg(pcie, 0, PCIETCTLR);
40 	rcar_pci_write_reg(pcie, 0, PCIEMSR);
43 	rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP);
44 	rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS),
46 	rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), PCI_HEADER_TYPE_MASK,
50 	rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0);
52 	val = rcar_pci_read_reg(pcie, EXPCAP(1));
55 	rcar_pci_write_reg(pcie, val, EXPCAP(1));
57 	val = rcar_pci_read_reg(pcie, EXPCAP(2));
62 	rcar_pci_write_reg(pcie, val, EXPCAP(2));
65 	rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS,
69 	rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50);
72 	rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0);
93 	struct rcar_pcie *pcie = &ep->pcie;
105 			dev_err(pcie->dev, "missing outbound window %u\n", i);
111 			dev_err(pcie->dev, "Cannot request memory region %s.\n",
131 	struct rcar_pcie *pcie = &ep->pcie;
133 	struct device *dev = pcie->dev;
140 	pcie->base = devm_ioremap_resource(dev, &res);
141 	if (IS_ERR(pcie->base))
142 		return PTR_ERR(pcie->base);
163 	struct rcar_pcie *pcie = &ep->pcie;
169 		val = rcar_pci_read_reg(pcie, IDSETR0);
171 	rcar_pci_write_reg(pcie, val, IDSETR0);
177 	rcar_pci_write_reg(pcie, val, IDSETR1);
182 		val = rcar_pci_read_reg(pcie, SUBIDSETR);
184 	rcar_pci_write_reg(pcie, val, SUBIDSETR);
188 	val = rcar_pci_read_reg(pcie, PCICONF(15));
190 	rcar_pci_write_reg(pcie, val, PCICONF(15));
203 	struct rcar_pcie *pcie = &ep->pcie;
210 		dev_err(pcie->dev, "no free inbound window\n");
234 	rcar_pcie_set_inbound(pcie, cpu_addr,
237 	err = rcar_pcie_wait_for_phyrdy(pcie);
239 		dev_err(pcie->dev, "phy not ready\n");
253 	rcar_pcie_set_inbound(&ep->pcie, 0x0, 0x0, 0x0, bar, false);
263 	struct rcar_pcie *pcie = &ep->pcie;
266 	flags = rcar_pci_read_reg(pcie, MSICAP(fn));
268 	rcar_pci_write_reg(pcie, flags, MSICAP(fn));
276 	struct rcar_pcie *pcie = &ep->pcie;
279 	flags = rcar_pci_read_reg(pcie, MSICAP(fn));
290 	struct rcar_pcie *pcie = &ep->pcie;
297 	err = rcar_pcie_wait_for_dl(pcie);
299 		dev_err(pcie->dev, "link not up\n");
305 		dev_err(pcie->dev, "failed to get corresponding window\n");
316 	rcar_pcie_set_outbound(pcie, window, &win);
341 	rcar_pcie_set_outbound(&ep->pcie, idx, &win);
349 	struct rcar_pcie *pcie = &ep->pcie;
352 	val = rcar_pci_read_reg(pcie, PCIEMSITXR);
354 		dev_err(pcie->dev, "MSI is enabled, cannot assert INTx\n");
358 	val = rcar_pci_read_reg(pcie, PCICONF(1));
360 		dev_err(pcie->dev, "INTx message transmission is disabled\n");
364 	val = rcar_pci_read_reg(pcie, PCIEINTXR);
366 		dev_err(pcie->dev, "INTx is already asserted\n");
371 	rcar_pci_write_reg(pcie, val, PCIEINTXR);
373 	val = rcar_pci_read_reg(pcie, PCIEINTXR);
375 	rcar_pci_write_reg(pcie, val, PCIEINTXR);
380 static int rcar_pcie_ep_assert_msi(struct rcar_pcie *pcie,
387 	val = rcar_pci_read_reg(pcie, MSICAP(fn));
398 	val = rcar_pci_read_reg(pcie, PCIEMSITXR);
399 	rcar_pci_write_reg(pcie, val | (interrupt_num - 1), PCIEMSITXR);
414 		return rcar_pcie_ep_assert_msi(&ep->pcie, fn, interrupt_num);
425 	rcar_pci_write_reg(&ep->pcie, MACCTLR_INIT_VAL, MACCTLR);
426 	rcar_pci_write_reg(&ep->pcie, CFINIT, PCIETCTLR);
435 	rcar_pci_write_reg(&ep->pcie, 0, PCIETCTLR);
475 	{ .compatible = "renesas,r8a774c0-pcie-ep", },
476 	{ .compatible = "renesas,rcar-gen3-pcie-ep" },
484 	struct rcar_pcie *pcie;
492 	pcie = &ep->pcie;
493 	pcie->dev = dev;
537 	rcar_pcie_ep_hw_init(pcie);
560 		.name = "rcar-pcie-ep",