1 /* 2 * drivers/net/phy/qsemi.c 3 * 4 * Driver for Quality Semiconductor PHYs 5 * 6 * Author: Andy Fleming 7 * 8 * Copyright (c) 2004 Freescale Semiconductor, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 */ 16 #include <linux/kernel.h> 17 #include <linux/string.h> 18 #include <linux/errno.h> 19 #include <linux/unistd.h> 20 #include <linux/interrupt.h> 21 #include <linux/init.h> 22 #include <linux/delay.h> 23 #include <linux/netdevice.h> 24 #include <linux/etherdevice.h> 25 #include <linux/skbuff.h> 26 #include <linux/spinlock.h> 27 #include <linux/mm.h> 28 #include <linux/module.h> 29 #include <linux/mii.h> 30 #include <linux/ethtool.h> 31 #include <linux/phy.h> 32 33 #include <asm/io.h> 34 #include <asm/irq.h> 35 #include <linux/uaccess.h> 36 37 /* ------------------------------------------------------------------------- */ 38 /* The Quality Semiconductor QS6612 is used on the RPX CLLF */ 39 40 /* register definitions */ 41 42 #define MII_QS6612_MCR 17 /* Mode Control Register */ 43 #define MII_QS6612_FTR 27 /* Factory Test Register */ 44 #define MII_QS6612_MCO 28 /* Misc. Control Register */ 45 #define MII_QS6612_ISR 29 /* Interrupt Source Register */ 46 #define MII_QS6612_IMR 30 /* Interrupt Mask Register */ 47 #define MII_QS6612_IMR_INIT 0x003a 48 #define MII_QS6612_PCR 31 /* 100BaseTx PHY Control Reg. */ 49 50 #define QS6612_PCR_AN_COMPLETE 0x1000 51 #define QS6612_PCR_RLBEN 0x0200 52 #define QS6612_PCR_DCREN 0x0100 53 #define QS6612_PCR_4B5BEN 0x0040 54 #define QS6612_PCR_TX_ISOLATE 0x0020 55 #define QS6612_PCR_MLT3_DIS 0x0002 56 #define QS6612_PCR_SCRM_DESCRM 0x0001 57 58 MODULE_DESCRIPTION("Quality Semiconductor PHY driver"); 59 MODULE_AUTHOR("Andy Fleming"); 60 MODULE_LICENSE("GPL"); 61 62 /* Returns 0, unless there's a write error */ 63 static int qs6612_config_init(struct phy_device *phydev) 64 { 65 /* The PHY powers up isolated on the RPX, 66 * so send a command to allow operation. 67 * XXX - My docs indicate this should be 0x0940 68 * ...or something. The current value sets three 69 * reserved bits, bit 11, which specifies it should be 70 * set to one, bit 10, which specifies it should be set 71 * to 0, and bit 7, which doesn't specify. However, my 72 * docs are preliminary, and I will leave it like this 73 * until someone more knowledgable corrects me or it. 74 * -- Andy Fleming 75 */ 76 return phy_write(phydev, MII_QS6612_PCR, 0x0dc0); 77 } 78 79 static int qs6612_ack_interrupt(struct phy_device *phydev) 80 { 81 int err; 82 83 err = phy_read(phydev, MII_QS6612_ISR); 84 85 if (err < 0) 86 return err; 87 88 err = phy_read(phydev, MII_BMSR); 89 90 if (err < 0) 91 return err; 92 93 err = phy_read(phydev, MII_EXPANSION); 94 95 if (err < 0) 96 return err; 97 98 return 0; 99 } 100 101 static int qs6612_config_intr(struct phy_device *phydev) 102 { 103 int err; 104 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 105 err = phy_write(phydev, MII_QS6612_IMR, 106 MII_QS6612_IMR_INIT); 107 else 108 err = phy_write(phydev, MII_QS6612_IMR, 0); 109 110 return err; 111 112 } 113 114 static struct phy_driver qs6612_driver[] = { { 115 .phy_id = 0x00181440, 116 .name = "QS6612", 117 .phy_id_mask = 0xfffffff0, 118 .features = PHY_BASIC_FEATURES, 119 .config_init = qs6612_config_init, 120 .ack_interrupt = qs6612_ack_interrupt, 121 .config_intr = qs6612_config_intr, 122 } }; 123 124 module_phy_driver(qs6612_driver); 125 126 static struct mdio_device_id __maybe_unused qs6612_tbl[] = { 127 { 0x00181440, 0xfffffff0 }, 128 { } 129 }; 130 131 MODULE_DEVICE_TABLE(mdio, qs6612_tbl); 132