4 * SPDX-License-Identifier: GPL-2.0+
6 * Copyright 2010-2011 Freescale Semiconductor, Inc.
13 /* Broadcom BCM54xx -- taken from linux sungem_phy */
14 #define MIIM_BCM54xx_AUXCNTL 0x18
15 #define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)|(val & 0x7))
16 #define MIIM_BCM54xx_AUXSTATUS 0x19
17 #define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK 0x0700
18 #define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT 8
20 #define MIIM_BCM54XX_SHD 0x1c
21 #define MIIM_BCM54XX_SHD_WRITE 0x8000
22 #define MIIM_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10)
23 #define MIIM_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0)
24 #define MIIM_BCM54XX_SHD_WR_ENCODE(val, data) \
25 (MIIM_BCM54XX_SHD_WRITE | MIIM_BCM54XX_SHD_VAL(val) | \
26 MIIM_BCM54XX_SHD_DATA(data))
28 #define MIIM_BCM54XX_EXP_DATA 0x15 /* Expansion register data */
29 #define MIIM_BCM54XX_EXP_SEL 0x17 /* Expansion register select */
30 #define MIIM_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */
31 #define MIIM_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */
33 /* Broadcom BCM5461S */
34 static int bcm5461_config(struct phy_device *phydev)
36 genphy_config_aneg(phydev);
43 static int bcm54xx_parse_status(struct phy_device *phydev)
47 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS);
49 switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
50 MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
52 phydev->duplex = DUPLEX_HALF;
53 phydev->speed = SPEED_10;
56 phydev->duplex = DUPLEX_FULL;
57 phydev->speed = SPEED_10;
60 phydev->duplex = DUPLEX_HALF;
61 phydev->speed = SPEED_100;
64 phydev->duplex = DUPLEX_FULL;
65 phydev->speed = SPEED_100;
68 phydev->duplex = DUPLEX_HALF;
69 phydev->speed = SPEED_1000;
72 phydev->duplex = DUPLEX_FULL;
73 phydev->speed = SPEED_1000;
76 printf("Auto-neg error, defaulting to 10BT/HD\n");
77 phydev->duplex = DUPLEX_HALF;
78 phydev->speed = SPEED_10;
85 static int bcm54xx_startup(struct phy_device *phydev)
89 /* Read the Status (2x to make sure link is right) */
90 ret = genphy_update_link(phydev);
94 return bcm54xx_parse_status(phydev);
97 /* Broadcom BCM5482S */
99 * "Ethernet@Wirespeed" needs to be enabled to achieve link in certain
100 * circumstances. eg a gigabit TSEC connected to a gigabit switch with
101 * a 4-wire ethernet cable. Both ends advertise gigabit, but can't
102 * link. "Ethernet@Wirespeed" reduces advertised speed until link
105 static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg)
107 return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) | 0x8010;
110 static int bcm5482_config(struct phy_device *phydev)
115 reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
117 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg);
119 /* Setup read from auxilary control shadow register 7 */
120 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
121 MIIM_BCM54xx_AUXCNTL_ENCODE(7));
122 /* Read Misc Control register and or in Ethernet@Wirespeed */
123 reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL);
124 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg);
126 /* Initial config/enable of secondary SerDes interface */
127 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
128 MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
129 /* Write intial value to secondary SerDes Contol */
130 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
131 MIIM_BCM54XX_EXP_SEL_SSD | 0);
132 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA,
134 /* Enable copper/fiber auto-detect */
135 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
136 MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));
138 genphy_config_aneg(phydev);
143 static int bcm_cygnus_startup(struct phy_device *phydev)
147 /* Read the Status (2x to make sure link is right) */
148 ret = genphy_update_link(phydev);
152 return genphy_parse_link(phydev);
155 static int bcm_cygnus_config(struct phy_device *phydev)
157 genphy_config_aneg(phydev);
165 * Find out if PHY is in copper or serdes mode by looking at Expansion Reg
166 * 0x42 - "Operating Mode Status Register"
168 static int bcm5482_is_serdes(struct phy_device *phydev)
173 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
174 MIIM_BCM54XX_EXP_SEL_ER | 0x42);
175 val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
177 switch (val & 0x1f) {
178 case 0x0d: /* RGMII-to-100Base-FX */
179 case 0x0e: /* RGMII-to-SGMII */
180 case 0x0f: /* RGMII-to-SerDes */
181 case 0x12: /* SGMII-to-SerDes */
182 case 0x13: /* SGMII-to-100Base-FX */
183 case 0x16: /* SerDes-to-Serdes */
186 case 0x6: /* RGMII-to-Copper */
187 case 0x14: /* SGMII-to-Copper */
188 case 0x17: /* SerDes-to-Copper */
191 printf("ERROR, invalid PHY mode (0x%x\n)", val);
199 * Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating
200 * Mode Status Register"
202 static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev)
207 /* Wait 1s for link - Clause 37 autonegotiation happens very fast */
209 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
210 MIIM_BCM54XX_EXP_SEL_ER | 0x42);
211 val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
221 udelay(1000); /* 1 ms */
225 switch ((val >> 13) & 0x3) {
233 phydev->speed = 1000;
237 phydev->duplex = (val & 0x1000) == 0x1000;
243 * Figure out if BCM5482 is in serdes or copper mode and determine link
244 * configuration accordingly
246 static int bcm5482_startup(struct phy_device *phydev)
250 if (bcm5482_is_serdes(phydev)) {
251 bcm5482_parse_serdes_sr(phydev);
252 phydev->port = PORT_FIBRE;
256 /* Wait for auto-negotiation to complete or fail */
257 ret = genphy_update_link(phydev);
261 /* Parse BCM54xx copper aux status register */
262 return bcm54xx_parse_status(phydev);
265 static struct phy_driver BCM5461S_driver = {
266 .name = "Broadcom BCM5461S",
269 .features = PHY_GBIT_FEATURES,
270 .config = &bcm5461_config,
271 .startup = &bcm54xx_startup,
272 .shutdown = &genphy_shutdown,
275 static struct phy_driver BCM5464S_driver = {
276 .name = "Broadcom BCM5464S",
279 .features = PHY_GBIT_FEATURES,
280 .config = &bcm5461_config,
281 .startup = &bcm54xx_startup,
282 .shutdown = &genphy_shutdown,
285 static struct phy_driver BCM5482S_driver = {
286 .name = "Broadcom BCM5482S",
289 .features = PHY_GBIT_FEATURES,
290 .config = &bcm5482_config,
291 .startup = &bcm5482_startup,
292 .shutdown = &genphy_shutdown,
295 static struct phy_driver BCM_CYGNUS_driver = {
296 .name = "Broadcom CYGNUS GPHY",
299 .features = PHY_GBIT_FEATURES,
300 .config = &bcm_cygnus_config,
301 .startup = &bcm_cygnus_startup,
302 .shutdown = &genphy_shutdown,
305 int phy_broadcom_init(void)
307 phy_register(&BCM5482S_driver);
308 phy_register(&BCM5464S_driver);
309 phy_register(&BCM5461S_driver);
310 phy_register(&BCM_CYGNUS_driver);