1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2015-2016 Freescale Semiconductor, Inc.
10 #include <dm/platform_data/pfe_dm_eth.h>
12 #include <linux/delay.h>
13 #include <net/pfe_eth/pfe_eth.h>
15 extern struct gemac_s gem_info[];
16 #if defined(CONFIG_PHYLIB)
18 #define MDIO_TIMEOUT 5000
19 static int pfe_write_addr(struct mii_dev *bus, int phy_addr, int dev_addr,
22 void *reg_base = bus->priv;
26 int timeout = MDIO_TIMEOUT;
28 devadr = ((dev_addr & EMAC_MII_DATA_RA_MASK) << EMAC_MII_DATA_RA_SHIFT);
29 phy = ((phy_addr & EMAC_MII_DATA_PA_MASK) << EMAC_MII_DATA_PA_SHIFT);
31 reg_data = (EMAC_MII_DATA_TA | phy | devadr | reg_addr);
33 writel(reg_data, reg_base + EMAC_MII_DATA_REG);
36 * wait for the MII interrupt
38 while (!(readl(reg_base + EMAC_IEVENT_REG) & EMAC_IEVENT_MII)) {
40 printf("Phy MDIO read/write timeout\n");
48 writel(EMAC_IEVENT_MII, reg_base + EMAC_IEVENT_REG);
53 static int pfe_phy_read(struct mii_dev *bus, int phy_addr, int dev_addr,
56 void *reg_base = bus->priv;
61 int timeout = MDIO_TIMEOUT;
63 if (dev_addr == MDIO_DEVAD_NONE) {
64 reg = ((reg_addr & EMAC_MII_DATA_RA_MASK) <<
65 EMAC_MII_DATA_RA_SHIFT);
67 pfe_write_addr(bus, phy_addr, dev_addr, reg_addr);
68 reg = ((dev_addr & EMAC_MII_DATA_RA_MASK) <<
69 EMAC_MII_DATA_RA_SHIFT);
72 phy = ((phy_addr & EMAC_MII_DATA_PA_MASK) << EMAC_MII_DATA_PA_SHIFT);
74 if (dev_addr == MDIO_DEVAD_NONE)
75 reg_data = (EMAC_MII_DATA_ST | EMAC_MII_DATA_OP_RD |
76 EMAC_MII_DATA_TA | phy | reg);
78 reg_data = (EMAC_MII_DATA_OP_CL45_RD | EMAC_MII_DATA_TA |
81 writel(reg_data, reg_base + EMAC_MII_DATA_REG);
84 * wait for the MII interrupt
86 while (!(readl(reg_base + EMAC_IEVENT_REG) & EMAC_IEVENT_MII)) {
88 printf("Phy MDIO read/write timeout\n");
96 writel(EMAC_IEVENT_MII, reg_base + EMAC_IEVENT_REG);
99 * it's now safe to read the PHY's register
101 val = (u16)readl(reg_base + EMAC_MII_DATA_REG);
102 debug("%s: %p phy: 0x%x reg:0x%08x val:%#x\n", __func__, reg_base,
103 phy_addr, reg_addr, val);
108 static int pfe_phy_write(struct mii_dev *bus, int phy_addr, int dev_addr,
109 int reg_addr, u16 data)
111 void *reg_base = bus->priv;
115 int timeout = MDIO_TIMEOUT;
117 if (dev_addr == MDIO_DEVAD_NONE) {
118 reg = ((reg_addr & EMAC_MII_DATA_RA_MASK) <<
119 EMAC_MII_DATA_RA_SHIFT);
121 pfe_write_addr(bus, phy_addr, dev_addr, reg_addr);
122 reg = ((dev_addr & EMAC_MII_DATA_RA_MASK) <<
123 EMAC_MII_DATA_RA_SHIFT);
126 phy = ((phy_addr & EMAC_MII_DATA_PA_MASK) << EMAC_MII_DATA_PA_SHIFT);
128 if (dev_addr == MDIO_DEVAD_NONE)
129 reg_data = (EMAC_MII_DATA_ST | EMAC_MII_DATA_OP_WR |
130 EMAC_MII_DATA_TA | phy | reg | data);
132 reg_data = (EMAC_MII_DATA_OP_CL45_WR | EMAC_MII_DATA_TA |
135 writel(reg_data, reg_base + EMAC_MII_DATA_REG);
138 * wait for the MII interrupt
140 while (!(readl(reg_base + EMAC_IEVENT_REG) & EMAC_IEVENT_MII)) {
141 if (timeout-- <= 0) {
142 printf("Phy MDIO read/write timeout\n");
148 * clear MII interrupt
150 writel(EMAC_IEVENT_MII, reg_base + EMAC_IEVENT_REG);
152 debug("%s: phy: %02x reg:%02x val:%#x\n", __func__, phy_addr,
158 static void pfe_configure_serdes(struct pfe_eth_dev *priv)
161 int value, sgmii_2500 = 0;
162 struct gemac_s *gem = priv->gem;
164 if (gem->phy_mode == PHY_INTERFACE_MODE_SGMII_2500)
168 /* PCS configuration done with corresponding GEMAC */
169 bus.priv = gem_info[priv->gemac_port].gemac_base;
171 pfe_phy_read(&bus, 0, MDIO_DEVAD_NONE, 0x0);
172 pfe_phy_read(&bus, 0, MDIO_DEVAD_NONE, 0x1);
173 pfe_phy_read(&bus, 0, MDIO_DEVAD_NONE, 0x2);
174 pfe_phy_read(&bus, 0, MDIO_DEVAD_NONE, 0x3);
177 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x0, 0x8000);
179 /* SGMII IF mode + AN enable only for 1G SGMII, not for 2.5G */
180 value = PHY_SGMII_IF_MODE_SGMII;
182 value |= PHY_SGMII_IF_MODE_AN;
184 value |= PHY_SGMII_IF_MODE_SGMII_GBT;
186 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x14, value);
188 /* Dev ability according to SGMII specification */
189 value = PHY_SGMII_DEV_ABILITY_SGMII;
190 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x4, value);
192 /* These values taken from validation team */
194 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x13, 0x0);
195 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x12, 0x400);
197 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x13, 0x7);
198 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0x12, 0xa120);
202 value = PHY_SGMII_CR_DEF_VAL;
204 value |= PHY_SGMII_CR_RESET_AN;
205 /* Disable Auto neg for 2.5G SGMII as it doesn't support auto neg*/
207 value &= ~PHY_SGMII_ENABLE_AN;
208 pfe_phy_write(&bus, 0, MDIO_DEVAD_NONE, 0, value);
211 int pfe_phy_configure(struct pfe_eth_dev *priv, int dev_id, int phy_id)
213 struct phy_device *phydev = NULL;
214 struct udevice *dev = priv->dev;
215 struct gemac_s *gem = priv->gem;
216 struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;
221 /* Configure SGMII PCS */
222 if (gem->phy_mode == PHY_INTERFACE_MODE_SGMII ||
223 gem->phy_mode == PHY_INTERFACE_MODE_SGMII_2500) {
224 out_be32(&scfg->mdioselcr, 0x00000000);
225 pfe_configure_serdes(priv);
230 /* By this time on-chip SGMII initialization is done
231 * we can switch mdio interface to external PHYs
233 out_be32(&scfg->mdioselcr, 0x80000000);
235 phydev = phy_connect(gem->bus, phy_id, dev, gem->phy_mode);
237 printf("phy_connect failed\n");
243 priv->phydev = phydev;
249 struct mii_dev *pfe_mdio_init(struct pfe_mdio_info *mdio_info)
254 u32 pclk = 250000000;
258 printf("mdio_alloc failed\n");
261 bus->read = pfe_phy_read;
262 bus->write = pfe_phy_write;
264 /* MAC1 MDIO used to communicate with external PHYS */
265 bus->priv = mdio_info->reg_base;
266 sprintf(bus->name, mdio_info->name);
268 /* configure mdio speed */
269 mdio_speed = (DIV_ROUND_UP(pclk, 4000000) << EMAC_MII_SPEED_SHIFT);
270 mdio_speed |= EMAC_HOLDTIME(0x5);
271 writel(mdio_speed, mdio_info->reg_base + EMAC_MII_CTRL_REG);
273 ret = mdio_register(bus);
275 printf("mdio_register failed\n");
282 void pfe_set_mdio(int dev_id, struct mii_dev *bus)
284 gem_info[dev_id].bus = bus;
287 void pfe_set_phy_address_mode(int dev_id, int phy_id, int phy_mode)
289 gem_info[dev_id].phy_address = phy_id;
290 gem_info[dev_id].phy_mode = phy_mode;