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  L1FAEG			BIT(31)
89 #define  PMEL1RX		BIT(23)
90 #define  PMSTATE		GENMASK(18, 16)
91 #define  PMSTATE_L1		(3 << 16)
92 #define PMCTLR			0x011060
93 #define  L1IATN			BIT(31)
94 
95 #define MACS2R			0x011078
96 #define MACCGSPSETR		0x011084
97 #define  SPCNGRSN		BIT(31)
98 
99 /* R-Car H1 PHY */
100 #define H1_PCIEPHYADRR		0x04000c
101 #define  WRITE_CMD		BIT(16)
102 #define  PHY_ACK		BIT(24)
103 #define  RATE_POS		12
104 #define  LANE_POS		8
105 #define  ADR_POS		0
106 #define H1_PCIEPHYDOUTR		0x040014
107 
108 /* R-Car Gen2 PHY */
109 #define GEN2_PCIEPHYADDR	0x780
110 #define GEN2_PCIEPHYDATA	0x784
111 #define GEN2_PCIEPHYCTRL	0x78c
112 
113 #define INT_PCI_MSI_NR		32
114 
115 #define RCONF(x)		(PCICONF(0) + (x))
116 #define RPMCAP(x)		(PMCAP(0) + (x))
117 #define REXPCAP(x)		(EXPCAP(0) + (x))
118 #define RVCCAP(x)		(VCCAP(0) + (x))
119 
120 #define PCIE_CONF_BUS(b)	(((b) & 0xff) << 24)
121 #define PCIE_CONF_DEV(d)	(((d) & 0x1f) << 19)
122 #define PCIE_CONF_FUNC(f)	(((f) & 0x7) << 16)
123 
124 #define RCAR_PCI_MAX_RESOURCES	4
125 #define MAX_NR_INBOUND_MAPS	6
126 
127 struct rcar_pcie {
128 	struct device		*dev;
129 	void __iomem		*base;
130 };
131 
132 enum {
133 	RCAR_PCI_ACCESS_READ,
134 	RCAR_PCI_ACCESS_WRITE,
135 };
136 
137 void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, unsigned int reg);
138 u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg);
139 void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data);
140 int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie);
141 int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie);
142 void rcar_pcie_set_outbound(struct rcar_pcie *pcie, int win,
143 			    struct resource_entry *window);
144 void rcar_pcie_set_inbound(struct rcar_pcie *pcie, u64 cpu_addr,
145 			   u64 pci_addr, u64 flags, int idx, bool host);
146 
147 #endif
148