diff options
Diffstat (limited to 'drivers/net/phy/national.c')
| -rw-r--r-- | drivers/net/phy/national.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/net/phy/national.c b/drivers/net/phy/national.c new file mode 100644 index 000000000000..6c636eb72089 --- /dev/null +++ b/drivers/net/phy/national.c @@ -0,0 +1,155 @@ +/* + * 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); + return; +} + +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"); + + return; +} + +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); |