1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for the Texas Instruments DP83848 PHY
5 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
8 #include <linux/module.h>
11 #define TI_DP83848C_PHY_ID 0x20005ca0
12 #define TI_DP83620_PHY_ID 0x20005ce0
13 #define NS_DP83848C_PHY_ID 0x20005c90
14 #define TLK10X_PHY_ID 0x2000a210
17 #define DP83848_MICR 0x11 /* MII Interrupt Control Register */
18 #define DP83848_MISR 0x12 /* MII Interrupt Status Register */
20 /* MICR Register Fields */
21 #define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
22 #define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
24 /* MISR Register Fields */
25 #define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
26 #define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
27 #define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
28 #define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
29 #define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
30 #define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
31 #define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
32 #define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
34 #define DP83848_INT_EN_MASK \
35 (DP83848_MISR_ANC_INT_EN | \
36 DP83848_MISR_DUP_INT_EN | \
37 DP83848_MISR_SPD_INT_EN | \
38 DP83848_MISR_LINK_INT_EN)
40 #define DP83848_MISR_RHF_INT BIT(8)
41 #define DP83848_MISR_FHF_INT BIT(9)
42 #define DP83848_MISR_ANC_INT BIT(10)
43 #define DP83848_MISR_DUP_INT BIT(11)
44 #define DP83848_MISR_SPD_INT BIT(12)
45 #define DP83848_MISR_LINK_INT BIT(13)
46 #define DP83848_MISR_ED_INT BIT(14)
48 #define DP83848_INT_MASK \
49 (DP83848_MISR_ANC_INT | \
50 DP83848_MISR_DUP_INT | \
51 DP83848_MISR_SPD_INT | \
52 DP83848_MISR_LINK_INT)
54 static int dp83848_ack_interrupt(struct phy_device *phydev)
56 int err = phy_read(phydev, DP83848_MISR);
58 return err < 0 ? err : 0;
61 static int dp83848_config_intr(struct phy_device *phydev)
65 control = phy_read(phydev, DP83848_MICR);
69 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
70 control |= DP83848_MICR_INT_OE;
71 control |= DP83848_MICR_INTEN;
73 ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
77 control &= ~DP83848_MICR_INTEN;
80 return phy_write(phydev, DP83848_MICR, control);
83 static irqreturn_t dp83848_handle_interrupt(struct phy_device *phydev)
87 irq_status = phy_read(phydev, DP83848_MISR);
93 if (!(irq_status & DP83848_INT_MASK))
96 phy_trigger_machine(phydev);
101 static int dp83848_config_init(struct phy_device *phydev)
105 /* DP83620 always reports Auto Negotiation Ability on BMSR. Instead,
106 * we check initial value of BMCR Auto negotiation enable bit
108 val = phy_read(phydev, MII_BMCR);
109 if (!(val & BMCR_ANENABLE))
110 phydev->autoneg = AUTONEG_DISABLE;
115 static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
116 { TI_DP83848C_PHY_ID, 0xfffffff0 },
117 { NS_DP83848C_PHY_ID, 0xfffffff0 },
118 { TI_DP83620_PHY_ID, 0xfffffff0 },
119 { TLK10X_PHY_ID, 0xfffffff0 },
122 MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
124 #define DP83848_PHY_DRIVER(_id, _name, _config_init) \
127 .phy_id_mask = 0xfffffff0, \
129 /* PHY_BASIC_FEATURES */ \
131 .soft_reset = genphy_soft_reset, \
132 .config_init = _config_init, \
133 .suspend = genphy_suspend, \
134 .resume = genphy_resume, \
137 .ack_interrupt = dp83848_ack_interrupt, \
138 .config_intr = dp83848_config_intr, \
139 .handle_interrupt = dp83848_handle_interrupt, \
142 static struct phy_driver dp83848_driver[] = {
143 DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY",
145 DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY",
147 DP83848_PHY_DRIVER(TI_DP83620_PHY_ID, "TI DP83620 10/100 Mbps PHY",
148 dp83848_config_init),
149 DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY",
152 module_phy_driver(dp83848_driver);
154 MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
155 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
156 MODULE_LICENSE("GPL v2");