1 /* 2 * Driver for the Texas Instruments DP83848 PHY 3 * 4 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/ 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #include <linux/module.h> 17 #include <linux/phy.h> 18 19 #define TI_DP83848C_PHY_ID 0x20005ca0 20 #define NS_DP83848C_PHY_ID 0x20005c90 21 #define TLK10X_PHY_ID 0x2000a210 22 23 /* Registers */ 24 #define DP83848_MICR 0x11 /* MII Interrupt Control Register */ 25 #define DP83848_MISR 0x12 /* MII Interrupt Status Register */ 26 27 /* MICR Register Fields */ 28 #define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */ 29 #define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */ 30 31 /* MISR Register Fields */ 32 #define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */ 33 #define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */ 34 #define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */ 35 #define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */ 36 #define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */ 37 #define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */ 38 #define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */ 39 #define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */ 40 41 #define DP83848_INT_EN_MASK \ 42 (DP83848_MISR_ANC_INT_EN | \ 43 DP83848_MISR_DUP_INT_EN | \ 44 DP83848_MISR_SPD_INT_EN | \ 45 DP83848_MISR_LINK_INT_EN) 46 47 static int dp83848_ack_interrupt(struct phy_device *phydev) 48 { 49 int err = phy_read(phydev, DP83848_MISR); 50 51 return err < 0 ? err : 0; 52 } 53 54 static int dp83848_config_intr(struct phy_device *phydev) 55 { 56 int control, ret; 57 58 control = phy_read(phydev, DP83848_MICR); 59 if (control < 0) 60 return control; 61 62 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { 63 control |= DP83848_MICR_INT_OE; 64 control |= DP83848_MICR_INTEN; 65 66 ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK); 67 if (ret < 0) 68 return ret; 69 } else { 70 control &= ~DP83848_MICR_INTEN; 71 } 72 73 return phy_write(phydev, DP83848_MICR, control); 74 } 75 76 static struct mdio_device_id __maybe_unused dp83848_tbl[] = { 77 { TI_DP83848C_PHY_ID, 0xfffffff0 }, 78 { NS_DP83848C_PHY_ID, 0xfffffff0 }, 79 { TLK10X_PHY_ID, 0xfffffff0 }, 80 { } 81 }; 82 MODULE_DEVICE_TABLE(mdio, dp83848_tbl); 83 84 #define DP83848_PHY_DRIVER(_id, _name) \ 85 { \ 86 .phy_id = _id, \ 87 .phy_id_mask = 0xfffffff0, \ 88 .name = _name, \ 89 .features = PHY_BASIC_FEATURES, \ 90 .flags = PHY_HAS_INTERRUPT, \ 91 \ 92 .soft_reset = genphy_soft_reset, \ 93 .config_init = genphy_config_init, \ 94 .suspend = genphy_suspend, \ 95 .resume = genphy_resume, \ 96 .config_aneg = genphy_config_aneg, \ 97 .read_status = genphy_read_status, \ 98 \ 99 /* IRQ related */ \ 100 .ack_interrupt = dp83848_ack_interrupt, \ 101 .config_intr = dp83848_config_intr, \ 102 } 103 104 static struct phy_driver dp83848_driver[] = { 105 DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"), 106 DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY"), 107 DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY"), 108 }; 109 module_phy_driver(dp83848_driver); 110 111 MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver"); 112 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com"); 113 MODULE_LICENSE("GPL"); 114