1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2011 - 2012 Cavium, Inc. 7 */ 8 9 #include <linux/module.h> 10 #include <linux/phy.h> 11 #include <linux/of.h> 12 13 #define PHY_ID_BCM8706 0x0143bdc1 14 #define PHY_ID_BCM8727 0x0143bff0 15 16 #define BCM87XX_PMD_RX_SIGNAL_DETECT (MII_ADDR_C45 | 0x1000a) 17 #define BCM87XX_10GBASER_PCS_STATUS (MII_ADDR_C45 | 0x30020) 18 #define BCM87XX_XGXS_LANE_STATUS (MII_ADDR_C45 | 0x40018) 19 20 #define BCM87XX_LASI_CONTROL (MII_ADDR_C45 | 0x39002) 21 #define BCM87XX_LASI_STATUS (MII_ADDR_C45 | 0x39005) 22 23 #if IS_ENABLED(CONFIG_OF_MDIO) 24 /* Set and/or override some configuration registers based on the 25 * broadcom,c45-reg-init property stored in the of_node for the phydev. 26 * 27 * broadcom,c45-reg-init = <devid reg mask value>,...; 28 * 29 * There may be one or more sets of <devid reg mask value>: 30 * 31 * devid: which sub-device to use. 32 * reg: the register. 33 * mask: if non-zero, ANDed with existing register value. 34 * value: ORed with the masked value and written to the regiser. 35 * 36 */ 37 static int bcm87xx_of_reg_init(struct phy_device *phydev) 38 { 39 const __be32 *paddr; 40 const __be32 *paddr_end; 41 int len, ret; 42 43 if (!phydev->dev.of_node) 44 return 0; 45 46 paddr = of_get_property(phydev->dev.of_node, 47 "broadcom,c45-reg-init", &len); 48 if (!paddr) 49 return 0; 50 51 paddr_end = paddr + (len /= sizeof(*paddr)); 52 53 ret = 0; 54 55 while (paddr + 3 < paddr_end) { 56 u16 devid = be32_to_cpup(paddr++); 57 u16 reg = be32_to_cpup(paddr++); 58 u16 mask = be32_to_cpup(paddr++); 59 u16 val_bits = be32_to_cpup(paddr++); 60 int val; 61 u32 regnum = MII_ADDR_C45 | (devid << 16) | reg; 62 val = 0; 63 if (mask) { 64 val = phy_read(phydev, regnum); 65 if (val < 0) { 66 ret = val; 67 goto err; 68 } 69 val &= mask; 70 } 71 val |= val_bits; 72 73 ret = phy_write(phydev, regnum, val); 74 if (ret < 0) 75 goto err; 76 } 77 err: 78 return ret; 79 } 80 #else 81 static int bcm87xx_of_reg_init(struct phy_device *phydev) 82 { 83 return 0; 84 } 85 #endif /* CONFIG_OF_MDIO */ 86 87 static int bcm87xx_config_init(struct phy_device *phydev) 88 { 89 phydev->supported = SUPPORTED_10000baseR_FEC; 90 phydev->advertising = ADVERTISED_10000baseR_FEC; 91 phydev->state = PHY_NOLINK; 92 phydev->autoneg = AUTONEG_DISABLE; 93 94 bcm87xx_of_reg_init(phydev); 95 96 return 0; 97 } 98 99 static int bcm87xx_config_aneg(struct phy_device *phydev) 100 { 101 return -EINVAL; 102 } 103 104 static int bcm87xx_read_status(struct phy_device *phydev) 105 { 106 int rx_signal_detect; 107 int pcs_status; 108 int xgxs_lane_status; 109 110 rx_signal_detect = phy_read(phydev, BCM87XX_PMD_RX_SIGNAL_DETECT); 111 if (rx_signal_detect < 0) 112 return rx_signal_detect; 113 114 if ((rx_signal_detect & 1) == 0) 115 goto no_link; 116 117 pcs_status = phy_read(phydev, BCM87XX_10GBASER_PCS_STATUS); 118 if (pcs_status < 0) 119 return pcs_status; 120 121 if ((pcs_status & 1) == 0) 122 goto no_link; 123 124 xgxs_lane_status = phy_read(phydev, BCM87XX_XGXS_LANE_STATUS); 125 if (xgxs_lane_status < 0) 126 return xgxs_lane_status; 127 128 if ((xgxs_lane_status & 0x1000) == 0) 129 goto no_link; 130 131 phydev->speed = 10000; 132 phydev->link = 1; 133 phydev->duplex = 1; 134 return 0; 135 136 no_link: 137 phydev->link = 0; 138 return 0; 139 } 140 141 static int bcm87xx_config_intr(struct phy_device *phydev) 142 { 143 int reg, err; 144 145 reg = phy_read(phydev, BCM87XX_LASI_CONTROL); 146 147 if (reg < 0) 148 return reg; 149 150 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 151 reg |= 1; 152 else 153 reg &= ~1; 154 155 err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg); 156 return err; 157 } 158 159 static int bcm87xx_did_interrupt(struct phy_device *phydev) 160 { 161 int reg; 162 163 reg = phy_read(phydev, BCM87XX_LASI_STATUS); 164 165 if (reg < 0) { 166 dev_err(&phydev->dev, 167 "Error: Read of BCM87XX_LASI_STATUS failed: %d\n", reg); 168 return 0; 169 } 170 return (reg & 1) != 0; 171 } 172 173 static int bcm87xx_ack_interrupt(struct phy_device *phydev) 174 { 175 /* Reading the LASI status clears it. */ 176 bcm87xx_did_interrupt(phydev); 177 return 0; 178 } 179 180 static int bcm8706_match_phy_device(struct phy_device *phydev) 181 { 182 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706; 183 } 184 185 static int bcm8727_match_phy_device(struct phy_device *phydev) 186 { 187 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727; 188 } 189 190 static struct phy_driver bcm87xx_driver[] = { 191 { 192 .phy_id = PHY_ID_BCM8706, 193 .phy_id_mask = 0xffffffff, 194 .name = "Broadcom BCM8706", 195 .flags = PHY_HAS_INTERRUPT, 196 .config_init = bcm87xx_config_init, 197 .config_aneg = bcm87xx_config_aneg, 198 .read_status = bcm87xx_read_status, 199 .ack_interrupt = bcm87xx_ack_interrupt, 200 .config_intr = bcm87xx_config_intr, 201 .did_interrupt = bcm87xx_did_interrupt, 202 .match_phy_device = bcm8706_match_phy_device, 203 .driver = { .owner = THIS_MODULE }, 204 }, { 205 .phy_id = PHY_ID_BCM8727, 206 .phy_id_mask = 0xffffffff, 207 .name = "Broadcom BCM8727", 208 .flags = PHY_HAS_INTERRUPT, 209 .config_init = bcm87xx_config_init, 210 .config_aneg = bcm87xx_config_aneg, 211 .read_status = bcm87xx_read_status, 212 .ack_interrupt = bcm87xx_ack_interrupt, 213 .config_intr = bcm87xx_config_intr, 214 .did_interrupt = bcm87xx_did_interrupt, 215 .match_phy_device = bcm8727_match_phy_device, 216 .driver = { .owner = THIS_MODULE }, 217 } }; 218 219 module_phy_driver(bcm87xx_driver); 220 221 MODULE_LICENSE("GPL"); 222