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43b3cf6634
Currently, SGMII based 1G rely on the hardware registers for link state and sometimes it's not reliable. To get most accurate link state, this interface has to use the MDIO bus to poll the PHY. In X-Gene SoC, MDIO bus is shared across RGMII and SGMII based 1G interfaces, so adding this driver to manage MDIO bus. This driver registers the mdio bus and registers the PHYs connected to it. Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Tested-by: Fushen Chen <fchen@apm.com> Tested-by: Toan Le <toanle@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/* Applied Micro X-Gene SoC MDIO Driver
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*
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* Copyright (c) 2016, Applied Micro Circuits Corporation
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* Author: Iyappan Subramanian <isubramanian@apm.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MDIO_XGENE_H__
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#define __MDIO_XGENE_H__
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#define BLOCK_XG_MDIO_CSR_OFFSET 0x5000
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#define BLOCK_DIAG_CSR_OFFSET 0xd000
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#define XGENET_CONFIG_REG_ADDR 0x20
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#define MAC_ADDR_REG_OFFSET 0x00
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#define MAC_COMMAND_REG_OFFSET 0x04
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#define MAC_WRITE_REG_OFFSET 0x08
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#define MAC_READ_REG_OFFSET 0x0c
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#define MAC_COMMAND_DONE_REG_OFFSET 0x10
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#define CLKEN_OFFSET 0x08
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#define SRST_OFFSET 0x00
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#define MENET_CFG_MEM_RAM_SHUTDOWN_ADDR 0x70
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#define MENET_BLOCK_MEM_RDY_ADDR 0x74
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#define MAC_CONFIG_1_ADDR 0x00
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#define MII_MGMT_COMMAND_ADDR 0x24
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#define MII_MGMT_ADDRESS_ADDR 0x28
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#define MII_MGMT_CONTROL_ADDR 0x2c
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#define MII_MGMT_STATUS_ADDR 0x30
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#define MII_MGMT_INDICATORS_ADDR 0x34
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#define SOFT_RESET BIT(31)
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#define MII_MGMT_CONFIG_ADDR 0x20
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#define MII_MGMT_COMMAND_ADDR 0x24
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#define MII_MGMT_ADDRESS_ADDR 0x28
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#define MII_MGMT_CONTROL_ADDR 0x2c
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#define MII_MGMT_STATUS_ADDR 0x30
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#define MII_MGMT_INDICATORS_ADDR 0x34
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#define MIIM_COMMAND_ADDR 0x20
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#define MIIM_FIELD_ADDR 0x24
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#define MIIM_CONFIGURATION_ADDR 0x28
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#define MIIM_LINKFAILVECTOR_ADDR 0x2c
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#define MIIM_INDICATOR_ADDR 0x30
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#define MIIMRD_FIELD_ADDR 0x34
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#define MDIO_CSR_OFFSET 0x5000
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#define REG_ADDR_POS 0
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#define REG_ADDR_LEN 5
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#define PHY_ADDR_POS 8
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#define PHY_ADDR_LEN 5
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#define HSTMIIMWRDAT_POS 0
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#define HSTMIIMWRDAT_LEN 16
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#define HSTPHYADX_POS 23
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#define HSTPHYADX_LEN 5
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#define HSTREGADX_POS 18
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#define HSTREGADX_LEN 5
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#define HSTLDCMD BIT(3)
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#define HSTMIIMCMD_POS 0
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#define HSTMIIMCMD_LEN 3
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#define BUSY_MASK BIT(0)
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#define READ_CYCLE_MASK BIT(0)
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enum xgene_enet_cmd {
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XGENE_ENET_WR_CMD = BIT(31),
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XGENE_ENET_RD_CMD = BIT(30)
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};
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enum {
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MIIM_CMD_IDLE,
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MIIM_CMD_LEGACY_WRITE,
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MIIM_CMD_LEGACY_READ,
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};
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enum xgene_mdio_id {
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XGENE_MDIO_RGMII = 1,
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XGENE_MDIO_XFI
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};
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struct xgene_mdio_pdata {
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struct clk *clk;
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struct device *dev;
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void __iomem *mac_csr_addr;
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void __iomem *diag_csr_addr;
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void __iomem *mdio_csr_addr;
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struct mii_bus *mdio_bus;
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int mdio_id;
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};
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/* Set the specified value into a bit-field defined by its starting position
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* and length within a single u64.
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*/
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static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
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{
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return (val & ((1ULL << len) - 1)) << pos;
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}
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#define SET_VAL(field, val) \
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xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
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#define SET_BIT(field) \
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xgene_enet_set_field_value(field ## _POS, 1, 1)
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/* Get the value from a bit-field defined by its starting position
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* and length within the specified u64.
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*/
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static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
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{
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return (src >> pos) & ((1ULL << len) - 1);
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}
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#define GET_VAL(field, src) \
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xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
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#define GET_BIT(field, src) \
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xgene_enet_get_field_value(field ## _POS, 1, src)
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static const struct of_device_id xgene_mdio_of_match[];
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id xgene_mdio_acpi_match[];
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#endif
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int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg);
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int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id, int reg, u16 data);
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struct phy_device *xgene_enet_phy_register(struct mii_bus *bus, int phy_addr);
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#endif /* __MDIO_XGENE_H__ */
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