269 lines
7.6 KiB
C
269 lines
7.6 KiB
C
/*
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*Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
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* Chenghu Wu <b16972@freescale.com>
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*
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* Driver for broadcom PHYs 522x
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/netdevice.h>
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/* DP83865 phy identifier values */
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#define BCM5222_PHY_ID 0x00406320
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/* PHY Register */
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#define BCM5222_TIMEOUT 0x100
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/* MII Registers */
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#define BCM5222_CTRL 0x00
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#define BCM5222_STATUS 0x01
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#define BCM5222_ID_HIGH 0x02
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#define BCM5222_ID_LOW 0x03
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#define BCM5222_AN_ADV 0x04
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#define BCM5222_AN_LP 0x05
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#define BCM5222_AN_EXP 0x06
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#define BCM5222_AN_NEXTPG 0x07
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#define BCM5222_AN_LP_NPTX 0x08
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#define BCM5222_AUX_CS 0x18
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#define BCM5222_AUX_STATUS 0x19
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/* CONTROL Bits */
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#define BCM5222_CTRL_RESET 0x8000
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#define BCM5222_CTRL_LOOPBACK 0x4000
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#define BCM5222_CTRL_FORCE 0x2000
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#define BCM5222_CTRL_AUTOEN 0x1000
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#define BCM5222_CTRL_PWRDN 0x0800
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#define BCM5222_CTRL_ISOLATE 0x0400
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#define BCM5222_CTRL_RESTART 0x0200
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#define BCM5222_CTRL_DUPLEX 0x0100
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#define BCM5222_CTRL_COLLEN 0x0080
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/* STATUS Bits */
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#define BCM5222_STATUS_100T4 0x8000
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#define BCM5222_STATUS_100TXFDX 0x4000
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#define BCM5222_STATUS_100TX 0x2000
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#define BCM5222_STATUS_10FDX 0x1000
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#define BCM5222_STATUS_10 0x0800
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#define BCM5222_STATUS_MF_PREAMBLE 0x0040
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#define BCM5222_STATUS_AN_COMPLETE 0x0020
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#define BCM5222_STATUS_REMOTE_FAULT 0x0010
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#define BCM5222_STATUS_AN_CAPABLE 0x0008
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#define BCM5222_STATUS_LINK 0x0004
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#define BCM5222_STATUS_JABBER 0x0002
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#define BCM5222_STATUS_EXT_CAP 0x0001
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/* ID Values */
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#define BCM5222_ID_HIGH_VAL 0x0040
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#define BCM5222_ID_LOW_VAL 0x6320
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/* Advertise Bits */
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#define BCM5222_AN_ADV_NEXTPG 0x8000
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#define BCM5222_AN_ADV_REMOTE_FAULT 0x2000
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#define BCM5222_AN_ADV_PAUSE 0x0400
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#define BCM5222_AN_ADV_100T4 0x0200
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#define BCM5222_AN_ADV_100TXFDX 0x0100
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#define BCM5222_AN_ADV_100TX 0x0080
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#define BCM5222_AN_ADV_10FDX 0x0040
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#define BCM5222_AN_ADV_10 0x0020
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#define BCM5222_AN_ADV_8023 0x0001
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#define BCM5222_AN_ADV_ALL \
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(BCM5222_AN_ADV_100TXFDX | \
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BCM5222_AN_ADV_100TXFDX | \
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BCM5222_AN_ADV_100TX | \
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BCM5222_AN_ADV_10FDX | \
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BCM5222_AN_ADV_10 | \
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BCM5222_AN_ADV_8023)
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/* AUX CTRL/STATUS Bits */
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#define BCM5222_AUX_CS_JABBER_DIS 0x8000
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#define BCM5222_AUX_CS_FORCE_LINK 0x4000
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#define BCM5222_AUX_CS_10M_TX_PWR 0x0100
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#define BCM5222_AUX_CS_HSQ_LSQ_MASK 0x00c0
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#define BCM5222_AUX_CS_EDGE_RATE_MASK 0x0030
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#define BCM5222_AUX_CS_AN_IND 0x0008
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#define BCM5222_AUX_CS_SPEED_FORCE 0x0004
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#define BCM5222_AUX_CS_SPEED 0x0002
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#define BCM5222_AUX_CS_DUPLEX 0x0001
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/* AUX STATUS Bits */
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#define BCM5222_AUX_STATUS_AN_COMP 0x8000
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#define BCM5222_AUX_STATUS_AN_COMPACK 0x4000
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#define BCM5222_AUX_STATUS_AN_ACKDET 0x2000
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#define BCM5222_AUX_STATUS_AN_ABDET 0x1000
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#define BCM5222_AUX_STATUS_AN_PAUSE 0x0800
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#define BCM5222_AUX_STATUS_AN_HCDMASK 0x0700
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#define BCM5222_AUX_STATUS_AN_PDFAULT 0x0080
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#define BCM5222_AUX_STATUS_LP_RMTFAULT 0x0040
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#define BCM5222_AUX_STATUS_LP_PGRX 0x0020
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#define BCM5222_AUX_STATUS_LP_NEGABLE 0x0010
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#define BCM5222_AUX_STATUS_SPEED 0x0008
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#define BCM5222_AUX_STATUS_LINK 0x0004
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#define BCM5222_AUX_STATUS_AN_EN 0x0002
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#define BCM5222_AUX_STATUS_JABBER 0x0001
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static int bcm5222_config_intr(struct phy_device *phydev)
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{
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int err = 0;
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printk(KERN_INFO "%s PHY_INTERRUPT %x\n",
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__func__, phydev->interrupts);
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return err;
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}
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static int bcm5222_ack_interrupt(struct phy_device *phydev)
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{
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return 0;
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}
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static int bcm5222_config_init(struct phy_device *phydev)
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{
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return bcm5222_ack_interrupt(phydev);
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}
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static int bcm5222_config_init_old(struct phy_device *phydev)
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{
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int timeout;
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int flag = 1;
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int ret = phy_read(phydev, BCM5222_AUX_STATUS);
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if (ret < 0) {
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printk(KERN_INFO "%s MII_BCM5222_ISR %x\n",
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__func__, ret);
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}
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/*
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* reset
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*/
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phy_write(phydev, BCM5222_CTRL, BCM5222_CTRL_RESET);
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/* check that it cleared */
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ret = phy_read(phydev, BCM5222_CTRL);
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printk(KERN_INFO "%s BCM5222_CTRL %x\n",
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__func__, ret);
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/*if reset bit is set, return */
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if (ret & BCM5222_CTRL_RESET) {
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printk(KERN_ERR "%s %x = BCM5222_CTRL_RESET(%x)\n",
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__func__, ret, BCM5222_CTRL_RESET);
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return -ETIME;
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}
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/*
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* setup auto-negotiation
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*/
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/* disable */
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phy_write(phydev, BCM5222_CTRL, 0);
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ret = phy_read(phydev, BCM5222_CTRL);
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printk(KERN_INFO "%s BCM5222_CTRL %x\n",
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__func__, ret);
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/* set the auto-negotiation advertisement register */
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phy_write(phydev, BCM5222_AN_ADV, BCM5222_AN_ADV_ALL);
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ret = phy_read(phydev, BCM5222_AN_ADV);
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printk(KERN_INFO "%s BCM5222_AN_ADV %x, BCM5222_AN_ADV_ALL %x\n",
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__func__, ret, BCM5222_AN_ADV_ALL);
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/* enable */
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phy_write(phydev, BCM5222_CTRL, BCM5222_CTRL_AUTOEN);
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ret = phy_read(phydev, BCM5222_CTRL);
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printk(KERN_INFO "%s BCM5222_CTRL %x\n",
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__func__, ret);
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printk(KERN_INFO "** wait for complete\n");
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/* read aux status reg */
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ret = phy_read(phydev, BCM5222_AUX_STATUS);
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/* Wait for the auto-negotiation completion */
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timeout = BCM5222_TIMEOUT;
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while (!(ret & BCM5222_AUX_STATUS_AN_COMP)) {
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if (!timeout--) {
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flag = 0;
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printk(KERN_INFO "BCM5222: TIMEOUT\n");
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break;
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}
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mdelay(10);
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/* Read PHY status register */
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ret = phy_read(phydev, BCM5222_AUX_STATUS);
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}
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ret = phy_read(phydev, BCM5222_AUX_STATUS);
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ret = phy_read(phydev, BCM5222_AN_ADV);
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return 0;
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}
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static int bcm5222_read_status(struct phy_device *phydev)
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{
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int ret;
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ret = phy_read(phydev, BCM5222_AUX_STATUS);
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printk(KERN_INFO "%s ret %x\n", __func__, ret);
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if (ret & BCM5222_AUX_STATUS_LINK)
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phydev->link = 1;
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else
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phydev->link = 0;
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if (ret & BCM5222_AUX_STATUS_SPEED)
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phydev->speed = SPEED_100;
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else
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phydev->speed = SPEED_10;
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ret = phy_read(phydev, BCM5222_AUX_CS);
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printk(KERN_INFO "%s ret %x\n", __func__, ret);
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if (ret & BCM5222_AUX_CS_DUPLEX)
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phydev->duplex = DUPLEX_FULL;
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else
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phydev->duplex = DUPLEX_HALF;
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return 0;
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}
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static int bcm5222_config_aneg(struct phy_device *phydev)
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{
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phy_read(phydev, BCM5222_AUX_STATUS);
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phy_read(phydev, BCM5222_AN_ADV);
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return 0;
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}
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static struct phy_driver bcm5222_driver = {
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.phy_id = BCM5222_PHY_ID,
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.phy_id_mask = 0xfffffff0,
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.name = "Broadcom BCM5222",
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.features = PHY_BASIC_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = bcm5222_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = bcm5222_ack_interrupt,
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.config_intr = bcm5222_config_intr,
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.driver = {.owner = THIS_MODULE,}
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};
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static int __init bcm5222_init(void)
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{
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int ret;
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ret = phy_driver_register(&bcm5222_driver);
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if (ret)
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goto err1;
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return 0;
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err1:
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printk(KERN_INFO "register bcm5222 PHY driver fail\n");
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return ret;
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}
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static void __exit bcm5222_exit(void)
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{
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phy_driver_unregister(&bcm5222_driver);
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}
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MODULE_DESCRIPTION("Broadcom PHY driver");
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MODULE_LICENSE("GPL v2");
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module_init(bcm5222_init);
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module_exit(bcm5222_exit);
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