tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0+ */
2/* Applied Micro X-Gene SoC MDIO Driver
3 *
4 * Copyright (c) 2016, Applied Micro Circuits Corporation
5 * Author: Iyappan Subramanian <isubramanian@apm.com>
6 */
7
8#ifndef __MDIO_XGENE_H__
9#define __MDIO_XGENE_H__
10
11#include <linux/bits.h>
12#include <linux/spinlock.h>
13#include <linux/types.h>
14
15#define BLOCK_XG_MDIO_CSR_OFFSET 0x5000
16#define BLOCK_DIAG_CSR_OFFSET 0xd000
17#define XGENET_CONFIG_REG_ADDR 0x20
18
19#define MAC_ADDR_REG_OFFSET 0x00
20#define MAC_COMMAND_REG_OFFSET 0x04
21#define MAC_WRITE_REG_OFFSET 0x08
22#define MAC_READ_REG_OFFSET 0x0c
23#define MAC_COMMAND_DONE_REG_OFFSET 0x10
24
25#define CLKEN_OFFSET 0x08
26#define SRST_OFFSET 0x00
27
28#define MENET_CFG_MEM_RAM_SHUTDOWN_ADDR 0x70
29#define MENET_BLOCK_MEM_RDY_ADDR 0x74
30
31#define MAC_CONFIG_1_ADDR 0x00
32#define MII_MGMT_COMMAND_ADDR 0x24
33#define MII_MGMT_ADDRESS_ADDR 0x28
34#define MII_MGMT_CONTROL_ADDR 0x2c
35#define MII_MGMT_STATUS_ADDR 0x30
36#define MII_MGMT_INDICATORS_ADDR 0x34
37#define SOFT_RESET BIT(31)
38
39#define MII_MGMT_CONFIG_ADDR 0x20
40#define MII_MGMT_COMMAND_ADDR 0x24
41#define MII_MGMT_ADDRESS_ADDR 0x28
42#define MII_MGMT_CONTROL_ADDR 0x2c
43#define MII_MGMT_STATUS_ADDR 0x30
44#define MII_MGMT_INDICATORS_ADDR 0x34
45
46#define MIIM_COMMAND_ADDR 0x20
47#define MIIM_FIELD_ADDR 0x24
48#define MIIM_CONFIGURATION_ADDR 0x28
49#define MIIM_LINKFAILVECTOR_ADDR 0x2c
50#define MIIM_INDICATOR_ADDR 0x30
51#define MIIMRD_FIELD_ADDR 0x34
52
53#define MDIO_CSR_OFFSET 0x5000
54
55#define REG_ADDR_POS 0
56#define REG_ADDR_LEN 5
57#define PHY_ADDR_POS 8
58#define PHY_ADDR_LEN 5
59
60#define HSTMIIMWRDAT_POS 0
61#define HSTMIIMWRDAT_LEN 16
62#define HSTPHYADX_POS 23
63#define HSTPHYADX_LEN 5
64#define HSTREGADX_POS 18
65#define HSTREGADX_LEN 5
66#define HSTLDCMD BIT(3)
67#define HSTMIIMCMD_POS 0
68#define HSTMIIMCMD_LEN 3
69
70#define BUSY_MASK BIT(0)
71#define READ_CYCLE_MASK BIT(0)
72
73enum xgene_enet_cmd {
74 XGENE_ENET_WR_CMD = BIT(31),
75 XGENE_ENET_RD_CMD = BIT(30)
76};
77
78enum {
79 MIIM_CMD_IDLE,
80 MIIM_CMD_LEGACY_WRITE,
81 MIIM_CMD_LEGACY_READ,
82};
83
84enum xgene_mdio_id {
85 XGENE_MDIO_RGMII = 1,
86 XGENE_MDIO_XFI
87};
88
89struct xgene_mdio_pdata {
90 struct clk *clk;
91 struct device *dev;
92 void __iomem *mac_csr_addr;
93 void __iomem *diag_csr_addr;
94 void __iomem *mdio_csr_addr;
95 struct mii_bus *mdio_bus;
96 int mdio_id;
97 spinlock_t mac_lock; /* mac lock */
98};
99
100/* Set the specified value into a bit-field defined by its starting position
101 * and length within a single u64.
102 */
103static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
104{
105 return (val & ((1ULL << len) - 1)) << pos;
106}
107
108#define SET_VAL(field, val) \
109 xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
110
111#define SET_BIT(field) \
112 xgene_enet_set_field_value(field ## _POS, 1, 1)
113
114/* Get the value from a bit-field defined by its starting position
115 * and length within the specified u64.
116 */
117static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
118{
119 return (src >> pos) & ((1ULL << len) - 1);
120}
121
122#define GET_VAL(field, src) \
123 xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
124
125#define GET_BIT(field, src) \
126 xgene_enet_get_field_value(field ## _POS, 1, src)
127
128u32 xgene_mdio_rd_mac(struct xgene_mdio_pdata *pdata, u32 rd_addr);
129void xgene_mdio_wr_mac(struct xgene_mdio_pdata *pdata, u32 wr_addr, u32 data);
130int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg);
131int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id, int reg, u16 data);
132struct phy_device *xgene_enet_phy_register(struct mii_bus *bus, int phy_addr);
133
134#endif /* __MDIO_XGENE_H__ */