1 // SPDX-License-Identifier: GPL-2.0
3  * PCIe driver for Renesas R-Car SoCs
4  *  Copyright (C) 2014-2020 Renesas Electronics Europe Ltd
12 #include "pcie-rcar.h"
14 void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, unsigned int reg)  in rcar_pci_write_reg()  argument
16 	writel(val, pcie->base + reg);  in rcar_pci_write_reg()
19 u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg)  in rcar_pci_read_reg()  argument
21 	return readl(pcie->base + reg);  in rcar_pci_read_reg()
24 void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data)  in rcar_rmw32()  argument
27 	u32 val = rcar_pci_read_reg(pcie, where & ~3);  in rcar_rmw32()
31 	rcar_pci_write_reg(pcie, val, where & ~3);  in rcar_rmw32()
34 int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie)  in rcar_pcie_wait_for_phyrdy()  argument
38 	while (timeout--) {  in rcar_pcie_wait_for_phyrdy()
39 		if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY)  in rcar_pcie_wait_for_phyrdy()
45 	return -ETIMEDOUT;  in rcar_pcie_wait_for_phyrdy()
48 int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie)  in rcar_pcie_wait_for_dl()  argument
52 	while (timeout--) {  in rcar_pcie_wait_for_dl()
53 		if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE))  in rcar_pcie_wait_for_dl()
60 	return -ETIMEDOUT;  in rcar_pcie_wait_for_dl()
63 void rcar_pcie_set_outbound(struct rcar_pcie *pcie, int win,  in rcar_pcie_set_outbound()  argument
66 	/* Setup PCIe address space mappings for each resource */  in rcar_pcie_set_outbound()
67 	struct resource *res = window->res;  in rcar_pcie_set_outbound()
72 	rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win));  in rcar_pcie_set_outbound()
80 		mask = (roundup_pow_of_two(size) / SZ_128) - 1;  in rcar_pcie_set_outbound()
83 	rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win));  in rcar_pcie_set_outbound()
85 	if (res->flags & IORESOURCE_IO)  in rcar_pcie_set_outbound()
86 		res_start = pci_pio_to_address(res->start) - window->offset;  in rcar_pcie_set_outbound()
88 		res_start = res->start - window->offset;  in rcar_pcie_set_outbound()
90 	rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win));  in rcar_pcie_set_outbound()
91 	rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F,  in rcar_pcie_set_outbound()
96 	if (res->flags & IORESOURCE_IO)  in rcar_pcie_set_outbound()
99 	rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win));  in rcar_pcie_set_outbound()
102 void rcar_pcie_set_inbound(struct rcar_pcie *pcie, u64 cpu_addr,  in rcar_pcie_set_inbound()  argument
103 			   u64 pci_addr, u64 flags, int idx, bool host)  in rcar_pcie_set_inbound()  argument
106 	 * Set up 64-bit inbound regions as the range parser doesn't  in rcar_pcie_set_inbound()
107 	 * distinguish between 32 and 64-bit types.  in rcar_pcie_set_inbound()
109 	if (host)  in rcar_pcie_set_inbound()
110 		rcar_pci_write_reg(pcie, lower_32_bits(pci_addr),  in rcar_pcie_set_inbound()
112 	rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx));  in rcar_pcie_set_inbound()
113 	rcar_pci_write_reg(pcie, flags, PCIELAMR(idx));  in rcar_pcie_set_inbound()
115 	if (host)  in rcar_pcie_set_inbound()
116 		rcar_pci_write_reg(pcie, upper_32_bits(pci_addr),  in rcar_pcie_set_inbound()
117 				   PCIEPRAR(idx + 1));  in rcar_pcie_set_inbound()
118 	rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), PCIELAR(idx + 1));  in rcar_pcie_set_inbound()
119 	rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1));  in rcar_pcie_set_inbound()