1 // SPDX-License-Identifier: GPL-2.0+
4 * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
10 #ifdef CONFIG_GDSYS_LEGACY_DRIVERS
11 #include <gdsys_fpga.h>
20 #ifndef CONFIG_GDSYS_LEGACY_DRIVERS
22 REG_MDIO_CONTROL = 0x0,
23 REG_MDIO_ADDR_DATA = 0x2,
24 REG_MDIO_RX_DATA = 0x4,
27 static inline u16 read_reg(struct udevice *fpga, uint base, uint addr)
32 regmap_init_mem(dev_ofnode(fpga), &map);
33 ptr = regmap_get_range(map, 0);
35 return in_le16((u16 *)(ptr + base + addr));
38 static inline void write_reg(struct udevice *fpga, uint base, uint addr,
44 regmap_init_mem(dev_ofnode(fpga), &map);
45 ptr = regmap_get_range(map, 0);
47 out_le16((u16 *)(ptr + base + addr), val);
51 static inline u16 read_control(struct ihs_mdio_info *info)
54 #ifdef CONFIG_GDSYS_LEGACY_DRIVERS
55 FPGA_GET_REG(info->fpga, mdio.control, &val);
57 val = read_reg(info->fpga, info->base, REG_MDIO_CONTROL);
62 static inline void write_control(struct ihs_mdio_info *info, u16 val)
64 #ifdef CONFIG_GDSYS_LEGACY_DRIVERS
65 FPGA_SET_REG(info->fpga, mdio.control, val);
67 write_reg(info->fpga, info->base, REG_MDIO_CONTROL, val);
71 static inline void write_addr_data(struct ihs_mdio_info *info, u16 val)
73 #ifdef CONFIG_GDSYS_LEGACY_DRIVERS
74 FPGA_SET_REG(info->fpga, mdio.address_data, val);
76 write_reg(info->fpga, info->base, REG_MDIO_ADDR_DATA, val);
80 static inline u16 read_rx_data(struct ihs_mdio_info *info)
83 #ifdef CONFIG_GDSYS_LEGACY_DRIVERS
84 FPGA_GET_REG(info->fpga, mdio.rx_data, &val);
86 val = read_reg(info->fpga, info->base, REG_MDIO_RX_DATA);
91 static int ihs_mdio_idle(struct mii_dev *bus)
93 struct ihs_mdio_info *info = bus->priv;
98 val = read_control(info);
102 } while (!(val & (1 << 12)));
107 static int ihs_mdio_reset(struct mii_dev *bus)
114 static int ihs_mdio_read(struct mii_dev *bus, int addr, int dev_addr,
117 struct ihs_mdio_info *info = bus->priv;
123 ((addr & 0x1f) << 5) | (regnum & 0x1f) | (2 << 10));
125 /* wait for rx data available */
128 val = read_rx_data(info);
133 static int ihs_mdio_write(struct mii_dev *bus, int addr, int dev_addr,
134 int regnum, u16 value)
136 struct ihs_mdio_info *info = bus->priv;
140 write_addr_data(info, value);
141 write_control(info, ((addr & 0x1f) << 5) | (regnum & 0x1f) | (1 << 10));
146 int ihs_mdio_init(struct ihs_mdio_info *info)
148 struct mii_dev *bus = mdio_alloc();
151 printf("Failed to allocate FSL MDIO bus\n");
155 bus->read = ihs_mdio_read;
156 bus->write = ihs_mdio_write;
157 bus->reset = ihs_mdio_reset;
158 strcpy(bus->name, info->name);
162 return mdio_register(bus);