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Linux kernel mirror (for testing)
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1/* Applied Micro X-Gene SoC MDIO Driver
2 *
3 * Copyright (c) 2016, Applied Micro Circuits Corporation
4 * Author: Iyappan Subramanian <isubramanian@apm.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#ifndef __MDIO_XGENE_H__
21#define __MDIO_XGENE_H__
22
23#define BLOCK_XG_MDIO_CSR_OFFSET 0x5000
24#define BLOCK_DIAG_CSR_OFFSET 0xd000
25#define XGENET_CONFIG_REG_ADDR 0x20
26
27#define MAC_ADDR_REG_OFFSET 0x00
28#define MAC_COMMAND_REG_OFFSET 0x04
29#define MAC_WRITE_REG_OFFSET 0x08
30#define MAC_READ_REG_OFFSET 0x0c
31#define MAC_COMMAND_DONE_REG_OFFSET 0x10
32
33#define CLKEN_OFFSET 0x08
34#define SRST_OFFSET 0x00
35
36#define MENET_CFG_MEM_RAM_SHUTDOWN_ADDR 0x70
37#define MENET_BLOCK_MEM_RDY_ADDR 0x74
38
39#define MAC_CONFIG_1_ADDR 0x00
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#define SOFT_RESET BIT(31)
46
47#define MII_MGMT_CONFIG_ADDR 0x20
48#define MII_MGMT_COMMAND_ADDR 0x24
49#define MII_MGMT_ADDRESS_ADDR 0x28
50#define MII_MGMT_CONTROL_ADDR 0x2c
51#define MII_MGMT_STATUS_ADDR 0x30
52#define MII_MGMT_INDICATORS_ADDR 0x34
53
54#define MIIM_COMMAND_ADDR 0x20
55#define MIIM_FIELD_ADDR 0x24
56#define MIIM_CONFIGURATION_ADDR 0x28
57#define MIIM_LINKFAILVECTOR_ADDR 0x2c
58#define MIIM_INDICATOR_ADDR 0x30
59#define MIIMRD_FIELD_ADDR 0x34
60
61#define MDIO_CSR_OFFSET 0x5000
62
63#define REG_ADDR_POS 0
64#define REG_ADDR_LEN 5
65#define PHY_ADDR_POS 8
66#define PHY_ADDR_LEN 5
67
68#define HSTMIIMWRDAT_POS 0
69#define HSTMIIMWRDAT_LEN 16
70#define HSTPHYADX_POS 23
71#define HSTPHYADX_LEN 5
72#define HSTREGADX_POS 18
73#define HSTREGADX_LEN 5
74#define HSTLDCMD BIT(3)
75#define HSTMIIMCMD_POS 0
76#define HSTMIIMCMD_LEN 3
77
78#define BUSY_MASK BIT(0)
79#define READ_CYCLE_MASK BIT(0)
80
81enum xgene_enet_cmd {
82 XGENE_ENET_WR_CMD = BIT(31),
83 XGENE_ENET_RD_CMD = BIT(30)
84};
85
86enum {
87 MIIM_CMD_IDLE,
88 MIIM_CMD_LEGACY_WRITE,
89 MIIM_CMD_LEGACY_READ,
90};
91
92enum xgene_mdio_id {
93 XGENE_MDIO_RGMII = 1,
94 XGENE_MDIO_XFI
95};
96
97struct xgene_mdio_pdata {
98 struct clk *clk;
99 struct device *dev;
100 void __iomem *mac_csr_addr;
101 void __iomem *diag_csr_addr;
102 void __iomem *mdio_csr_addr;
103 struct mii_bus *mdio_bus;
104 int mdio_id;
105 spinlock_t mac_lock; /* mac lock */
106};
107
108/* Set the specified value into a bit-field defined by its starting position
109 * and length within a single u64.
110 */
111static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
112{
113 return (val & ((1ULL << len) - 1)) << pos;
114}
115
116#define SET_VAL(field, val) \
117 xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
118
119#define SET_BIT(field) \
120 xgene_enet_set_field_value(field ## _POS, 1, 1)
121
122/* Get the value from a bit-field defined by its starting position
123 * and length within the specified u64.
124 */
125static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
126{
127 return (src >> pos) & ((1ULL << len) - 1);
128}
129
130#define GET_VAL(field, src) \
131 xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
132
133#define GET_BIT(field, src) \
134 xgene_enet_get_field_value(field ## _POS, 1, src)
135
136u32 xgene_mdio_rd_mac(struct xgene_mdio_pdata *pdata, u32 rd_addr);
137void xgene_mdio_wr_mac(struct xgene_mdio_pdata *pdata, u32 wr_addr, u32 data);
138int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg);
139int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id, int reg, u16 data);
140struct phy_device *xgene_enet_phy_register(struct mii_bus *bus, int phy_addr);
141
142#endif /* __MDIO_XGENE_H__ */