1 // SPDX-License-Identifier: GPL-2.0+
3 * ENETC ethernet controller driver
13 #include <asm/processor.h>
16 #include "fsl_enetc.h"
18 static void enetc_mdio_wait_bsy(struct enetc_mdio_priv *priv)
22 while ((enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) &&
29 int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,
32 if (devad == MDIO_DEVAD_NONE)
33 enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C22);
35 enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C45);
36 enetc_mdio_wait_bsy(priv);
38 if (devad == MDIO_DEVAD_NONE) {
39 enetc_write(priv, ENETC_MDIO_CTL, ENETC_MDIO_CTL_READ |
42 enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + devad);
43 enetc_mdio_wait_bsy(priv);
45 enetc_write(priv, ENETC_MDIO_STAT, reg);
46 enetc_mdio_wait_bsy(priv);
48 enetc_write(priv, ENETC_MDIO_CTL, ENETC_MDIO_CTL_READ |
52 enetc_mdio_wait_bsy(priv);
53 if (enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_RD_ER)
54 return ENETC_MDIO_READ_ERR;
56 return enetc_read(priv, ENETC_MDIO_DATA);
59 int enetc_mdio_write_priv(struct enetc_mdio_priv *priv, int addr, int devad,
62 if (devad == MDIO_DEVAD_NONE)
63 enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C22);
65 enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C45);
66 enetc_mdio_wait_bsy(priv);
68 if (devad != MDIO_DEVAD_NONE) {
69 enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + devad);
70 enetc_write(priv, ENETC_MDIO_STAT, reg);
72 enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + reg);
74 enetc_mdio_wait_bsy(priv);
76 enetc_write(priv, ENETC_MDIO_DATA, val);
77 enetc_mdio_wait_bsy(priv);
83 static int dm_enetc_mdio_read(struct udevice *dev, int addr, int devad, int reg)
85 struct enetc_mdio_priv *priv = dev_get_priv(dev);
87 return enetc_mdio_read_priv(priv, addr, devad, reg);
90 static int dm_enetc_mdio_write(struct udevice *dev, int addr, int devad,
93 struct enetc_mdio_priv *priv = dev_get_priv(dev);
95 return enetc_mdio_write_priv(priv, addr, devad, reg, val);
98 static const struct mdio_ops enetc_mdio_ops = {
99 .read = dm_enetc_mdio_read,
100 .write = dm_enetc_mdio_write,
103 static int enetc_mdio_bind(struct udevice *dev)
106 static int eth_num_devices;
109 * prefer using PCI function numbers to number interfaces, but these
110 * are only available if dts nodes are present. For PCI they are
111 * optional, handle that case too. Just in case some nodes are present
112 * and some are not, use different naming scheme - enetc-N based on
113 * PCI function # and enetc#N based on interface count
115 if (ofnode_valid(dev->node))
116 sprintf(name, "emdio-%u", PCI_FUNC(pci_get_devfn(dev)));
118 sprintf(name, "emdio#%u", eth_num_devices++);
119 device_set_name(dev, name);
124 static int enetc_mdio_probe(struct udevice *dev)
126 struct enetc_mdio_priv *priv = dev_get_priv(dev);
128 priv->regs_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, 0);
129 if (!priv->regs_base) {
130 enetc_dbg(dev, "failed to map BAR0\n");
134 priv->regs_base += ENETC_MDIO_BASE;
136 dm_pci_clrset_config16(dev, PCI_COMMAND, 0, PCI_COMMAND_MEMORY);
141 U_BOOT_DRIVER(enetc_mdio) = {
142 .name = "enetc_mdio",
144 .bind = enetc_mdio_bind,
145 .probe = enetc_mdio_probe,
146 .ops = &enetc_mdio_ops,
147 .priv_auto_alloc_size = sizeof(struct enetc_mdio_priv),
150 static struct pci_device_id enetc_mdio_ids[] = {
151 { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, PCI_DEVICE_ID_ENETC_MDIO) },
155 U_BOOT_PCI_DEVICE(enetc_mdio, enetc_mdio_ids);