linux/drivers/net/phy/national.c
Uwe Kleine-König cf93c94581 net/phy: fix many "defined but unused" warnings
MODULE_DEVICE_TABLE only expands to something if it's compiled
for a module.  So when building-in support for the phys, the
mdio_device_id tables are unused.  Marking them with __maybe_unused
fixes the following warnings:

	drivers/net/phy/bcm63xx.c:134: warning: 'bcm63xx_tbl' defined but not used
	drivers/net/phy/broadcom.c:933: warning: 'broadcom_tbl' defined but not used
	drivers/net/phy/cicada.c:162: warning: 'cicada_tbl' defined but not used
	drivers/net/phy/davicom.c:222: warning: 'davicom_tbl' defined but not used
	drivers/net/phy/et1011c.c:114: warning: 'et1011c_tbl' defined but not used
	drivers/net/phy/icplus.c:137: warning: 'icplus_tbl' defined but not used
	drivers/net/phy/lxt.c:226: warning: 'lxt_tbl' defined but not used
	drivers/net/phy/marvell.c:724: warning: 'marvell_tbl' defined but not used
	drivers/net/phy/micrel.c:234: warning: 'micrel_tbl' defined but not used
	drivers/net/phy/national.c:154: warning: 'ns_tbl' defined but not used
	drivers/net/phy/qsemi.c:141: warning: 'qs6612_tbl' defined but not used
	drivers/net/phy/realtek.c:82: warning: 'realtek_tbl' defined but not used
	drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not used
	drivers/net/phy/ste10Xp.c:135: warning: 'ste10Xp_tbl' defined but not used
	drivers/net/phy/vitesse.c:195: warning: 'vitesse_tbl' defined but not used

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05 00:34:29 -07:00

160 lines
4.1 KiB
C

/*
* drivers/net/phy/national.c
*
* Driver for National Semiconductor PHYs
*
* Author: Stuart Menefy <stuart.menefy@st.com>
* Maintainer: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*
* Copyright (c) 2008 STMicroelectronics Limited
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
/* DP83865 phy identifier values */
#define DP83865_PHY_ID 0x20005c7a
#define DP83865_INT_MASK_REG 0x15
#define DP83865_INT_MASK_STATUS 0x14
#define DP83865_INT_REMOTE_FAULT 0x0008
#define DP83865_INT_ANE_COMPLETED 0x0010
#define DP83865_INT_LINK_CHANGE 0xe000
#define DP83865_INT_MASK_DEFAULT (DP83865_INT_REMOTE_FAULT | \
DP83865_INT_ANE_COMPLETED | \
DP83865_INT_LINK_CHANGE)
/* Advanced proprietary configuration */
#define NS_EXP_MEM_CTL 0x16
#define NS_EXP_MEM_DATA 0x1d
#define NS_EXP_MEM_ADD 0x1e
#define LED_CTRL_REG 0x13
#define AN_FALLBACK_AN 0x0001
#define AN_FALLBACK_CRC 0x0002
#define AN_FALLBACK_IE 0x0004
#define ALL_FALLBACK_ON (AN_FALLBACK_AN | AN_FALLBACK_CRC | AN_FALLBACK_IE)
enum hdx_loopback {
hdx_loopback_on = 0,
hdx_loopback_off = 1,
};
static u8 ns_exp_read(struct phy_device *phydev, u16 reg)
{
phy_write(phydev, NS_EXP_MEM_ADD, reg);
return phy_read(phydev, NS_EXP_MEM_DATA);
}
static void ns_exp_write(struct phy_device *phydev, u16 reg, u8 data)
{
phy_write(phydev, NS_EXP_MEM_ADD, reg);
phy_write(phydev, NS_EXP_MEM_DATA, data);
}
static int ns_config_intr(struct phy_device *phydev)
{
int err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, DP83865_INT_MASK_REG,
DP83865_INT_MASK_DEFAULT);
else
err = phy_write(phydev, DP83865_INT_MASK_REG, 0);
return err;
}
static int ns_ack_interrupt(struct phy_device *phydev)
{
int ret = phy_read(phydev, DP83865_INT_MASK_STATUS);
if (ret < 0)
return ret;
return 0;
}
static void ns_giga_speed_fallback(struct phy_device *phydev, int mode)
{
int bmcr = phy_read(phydev, MII_BMCR);
phy_write(phydev, MII_BMCR, (bmcr | BMCR_PDOWN));
/* Enable 8 bit expended memory read/write (no auto increment) */
phy_write(phydev, NS_EXP_MEM_CTL, 0);
phy_write(phydev, NS_EXP_MEM_ADD, 0x1C0);
phy_write(phydev, NS_EXP_MEM_DATA, 0x0008);
phy_write(phydev, MII_BMCR, (bmcr & ~BMCR_PDOWN));
phy_write(phydev, LED_CTRL_REG, mode);
}
static void ns_10_base_t_hdx_loopack(struct phy_device *phydev, int disable)
{
if (disable)
ns_exp_write(phydev, 0x1c0, ns_exp_read(phydev, 0x1c0) | 1);
else
ns_exp_write(phydev, 0x1c0,
ns_exp_read(phydev, 0x1c0) & 0xfffe);
printk(KERN_DEBUG "DP83865 PHY: 10BASE-T HDX loopback %s\n",
(ns_exp_read(phydev, 0x1c0) & 0x0001) ? "off" : "on");
}
static int ns_config_init(struct phy_device *phydev)
{
ns_giga_speed_fallback(phydev, ALL_FALLBACK_ON);
/* In the latest MAC or switches design, the 10 Mbps loopback
is desired to be turned off. */
ns_10_base_t_hdx_loopack(phydev, hdx_loopback_off);
return ns_ack_interrupt(phydev);
}
static struct phy_driver dp83865_driver = {
.phy_id = DP83865_PHY_ID,
.phy_id_mask = 0xfffffff0,
.name = "NatSemi DP83865",
.features = PHY_GBIT_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_INTERRUPT,
.config_init = ns_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = ns_ack_interrupt,
.config_intr = ns_config_intr,
.driver = {.owner = THIS_MODULE,}
};
static int __init ns_init(void)
{
return phy_driver_register(&dp83865_driver);
}
static void __exit ns_exit(void)
{
phy_driver_unregister(&dp83865_driver);
}
MODULE_DESCRIPTION("NatSemi PHY driver");
MODULE_AUTHOR("Stuart Menefy");
MODULE_LICENSE("GPL");
module_init(ns_init);
module_exit(ns_exit);
static struct mdio_device_id __maybe_unused ns_tbl[] = {
{ DP83865_PHY_ID, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, ns_tbl);