tjh.dev
Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * PCIe driver for Renesas R-Car SoCs
4 * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd
5 *
6 * Author: Phil Edworthy <phil.edworthy@renesas.com>
7 */
8
9#ifndef _PCIE_RCAR_H
10#define _PCIE_RCAR_H
11
12#define PCIECAR 0x000010
13#define PCIECCTLR 0x000018
14#define CONFIG_SEND_ENABLE BIT(31)
15#define TYPE0 (0 << 8)
16#define TYPE1 BIT(8)
17#define PCIECDR 0x000020
18#define PCIEMSR 0x000028
19#define PCIEINTXR 0x000400
20#define ASTINTX BIT(16)
21#define PCIEPHYSR 0x0007f0
22#define PHYRDY BIT(0)
23#define PCIEMSITXR 0x000840
24
25/* Transfer control */
26#define PCIETCTLR 0x02000
27#define DL_DOWN BIT(3)
28#define CFINIT BIT(0)
29#define PCIETSTR 0x02004
30#define DATA_LINK_ACTIVE BIT(0)
31#define PCIEERRFR 0x02020
32#define UNSUPPORTED_REQUEST BIT(4)
33#define PCIEMSIFR 0x02044
34#define PCIEMSIALR 0x02048
35#define MSIFE BIT(0)
36#define PCIEMSIAUR 0x0204c
37#define PCIEMSIIER 0x02050
38
39/* root port address */
40#define PCIEPRAR(x) (0x02080 + ((x) * 0x4))
41
42/* local address reg & mask */
43#define PCIELAR(x) (0x02200 + ((x) * 0x20))
44#define PCIELAMR(x) (0x02208 + ((x) * 0x20))
45#define LAM_PREFETCH BIT(3)
46#define LAM_64BIT BIT(2)
47#define LAR_ENABLE BIT(1)
48
49/* PCIe address reg & mask */
50#define PCIEPALR(x) (0x03400 + ((x) * 0x20))
51#define PCIEPAUR(x) (0x03404 + ((x) * 0x20))
52#define PCIEPAMR(x) (0x03408 + ((x) * 0x20))
53#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20))
54#define PAR_ENABLE BIT(31)
55#define IO_SPACE BIT(8)
56
57/* Configuration */
58#define PCICONF(x) (0x010000 + ((x) * 0x4))
59#define INTDIS BIT(10)
60#define PMCAP(x) (0x010040 + ((x) * 0x4))
61#define MSICAP(x) (0x010050 + ((x) * 0x4))
62#define MSICAP0_MSIE BIT(16)
63#define MSICAP0_MMESCAP_OFFSET 17
64#define MSICAP0_MMESE_OFFSET 20
65#define MSICAP0_MMESE_MASK GENMASK(22, 20)
66#define EXPCAP(x) (0x010070 + ((x) * 0x4))
67#define VCCAP(x) (0x010100 + ((x) * 0x4))
68
69/* link layer */
70#define IDSETR0 0x011000
71#define IDSETR1 0x011004
72#define SUBIDSETR 0x011024
73#define TLCTLR 0x011048
74#define MACSR 0x011054
75#define SPCHGFIN BIT(4)
76#define SPCHGFAIL BIT(6)
77#define SPCHGSUC BIT(7)
78#define LINK_SPEED (0xf << 16)
79#define LINK_SPEED_2_5GTS (1 << 16)
80#define LINK_SPEED_5_0GTS (2 << 16)
81#define MACCTLR 0x011058
82#define MACCTLR_NFTS_MASK GENMASK(23, 16) /* The name is from SH7786 */
83#define SPEED_CHANGE BIT(24)
84#define SCRAMBLE_DISABLE BIT(27)
85#define LTSMDIS BIT(31)
86#define MACCTLR_INIT_VAL (LTSMDIS | MACCTLR_NFTS_MASK)
87#define PMSR 0x01105c
88#define MACS2R 0x011078
89#define MACCGSPSETR 0x011084
90#define SPCNGRSN BIT(31)
91
92/* R-Car H1 PHY */
93#define H1_PCIEPHYADRR 0x04000c
94#define WRITE_CMD BIT(16)
95#define PHY_ACK BIT(24)
96#define RATE_POS 12
97#define LANE_POS 8
98#define ADR_POS 0
99#define H1_PCIEPHYDOUTR 0x040014
100
101/* R-Car Gen2 PHY */
102#define GEN2_PCIEPHYADDR 0x780
103#define GEN2_PCIEPHYDATA 0x784
104#define GEN2_PCIEPHYCTRL 0x78c
105
106#define INT_PCI_MSI_NR 32
107
108#define RCONF(x) (PCICONF(0) + (x))
109#define RPMCAP(x) (PMCAP(0) + (x))
110#define REXPCAP(x) (EXPCAP(0) + (x))
111#define RVCCAP(x) (VCCAP(0) + (x))
112
113#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24)
114#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19)
115#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16)
116
117#define RCAR_PCI_MAX_RESOURCES 4
118#define MAX_NR_INBOUND_MAPS 6
119
120struct rcar_pcie {
121 struct device *dev;
122 void __iomem *base;
123};
124
125enum {
126 RCAR_PCI_ACCESS_READ,
127 RCAR_PCI_ACCESS_WRITE,
128};
129
130void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, unsigned int reg);
131u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg);
132void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data);
133int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie);
134int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie);
135void rcar_pcie_set_outbound(struct rcar_pcie *pcie, int win,
136 struct resource_entry *window);
137void rcar_pcie_set_inbound(struct rcar_pcie *pcie, u64 cpu_addr,
138 u64 pci_addr, u64 flags, int idx, bool host);
139
140#endif