| 1 | /* |
| 2 | * ADM6996 switch driver |
| 3 | * |
| 4 | * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License v2 as published by the |
| 8 | * Free Software Foundation |
| 9 | */ |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/string.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/unistd.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/skbuff.h> |
| 21 | #include <linux/spinlock.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/mii.h> |
| 25 | #include <linux/ethtool.h> |
| 26 | #include <linux/phy.h> |
| 27 | |
| 28 | #include <asm/io.h> |
| 29 | #include <asm/irq.h> |
| 30 | #include <asm/uaccess.h> |
| 31 | #include "adm6996.h" |
| 32 | |
| 33 | MODULE_DESCRIPTION("Infineon ADM6996 Switch"); |
| 34 | MODULE_AUTHOR("Felix Fietkau"); |
| 35 | MODULE_LICENSE("GPL"); |
| 36 | |
| 37 | struct adm6996_priv { |
| 38 | /* use abstraction for regops, we want to add gpio support in the future */ |
| 39 | u16 (*read)(struct phy_device *phydev, enum admreg reg); |
| 40 | void (*write)(struct phy_device *phydev, enum admreg reg, u16 val); |
| 41 | }; |
| 42 | |
| 43 | #define to_adm(_phy) ((struct adm6996_priv *) (_phy)->priv) |
| 44 | |
| 45 | |
| 46 | static inline u16 |
| 47 | r16(struct phy_device *pdev, enum admreg reg) |
| 48 | { |
| 49 | return to_adm(pdev)->read(pdev, reg); |
| 50 | } |
| 51 | |
| 52 | static inline void |
| 53 | w16(struct phy_device *pdev, enum admreg reg, u16 val) |
| 54 | { |
| 55 | to_adm(pdev)->write(pdev, reg, val); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | static u16 |
| 60 | adm6996_read_mii_reg(struct phy_device *phydev, enum admreg reg) |
| 61 | { |
| 62 | return phydev->bus->read(phydev->bus, PHYADDR(reg)); |
| 63 | } |
| 64 | |
| 65 | static void |
| 66 | adm6996_write_mii_reg(struct phy_device *phydev, enum admreg reg, u16 val) |
| 67 | { |
| 68 | phydev->bus->write(phydev->bus, PHYADDR(reg), val); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | static int adm6996_config_init(struct phy_device *pdev) |
| 73 | { |
| 74 | int i; |
| 75 | |
| 76 | printk("%s: ADM6996 PHY driver attached.\n", pdev->attached_dev->name); |
| 77 | pdev->supported = ADVERTISED_100baseT_Full; |
| 78 | pdev->advertising = ADVERTISED_100baseT_Full; |
| 79 | |
| 80 | /* initialize port and vlan settings */ |
| 81 | for (i = 0; i < ADM_PHY_PORTS; i++) { |
| 82 | w16(pdev, adm_portcfg[i], ADM_PORTCFG_INIT | |
| 83 | ADM_PORTCFG_PVID((i == ADM_WAN_PORT) ? 1 : 0)); |
| 84 | } |
| 85 | w16(pdev, adm_portcfg[5], ADM_PORTCFG_CPU); |
| 86 | |
| 87 | /* reset all ports */ |
| 88 | for (i = 0; i < ADM_PHY_PORTS; i++) { |
| 89 | w16(pdev, ADM_PHY_PORT(i), ADM_PHYCFG_INIT); |
| 90 | } |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static int adm6996_read_status(struct phy_device *phydev) |
| 96 | { |
| 97 | phydev->speed = SPEED_100; |
| 98 | phydev->duplex = DUPLEX_FULL; |
| 99 | phydev->link = 1; |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static int adm6996_config_aneg(struct phy_device *phydev) |
| 104 | { |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static int adm6996_fixup(struct phy_device *dev) |
| 109 | { |
| 110 | struct mii_bus *bus = dev->bus; |
| 111 | u16 reg; |
| 112 | |
| 113 | /* look for the switch on the bus */ |
| 114 | reg = bus->read(bus, PHYADDR(ADM_SIG0)) & ADM_SIG0_MASK; |
| 115 | if (reg != ADM_SIG0_VAL) |
| 116 | return 0; |
| 117 | |
| 118 | reg = bus->read(bus, PHYADDR(ADM_SIG1)) & ADM_SIG1_MASK; |
| 119 | if (reg != ADM_SIG1_VAL) |
| 120 | return 0; |
| 121 | |
| 122 | dev->phy_id = (ADM_SIG0_VAL << 16) | ADM_SIG1_VAL; |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | static int adm6996_probe(struct phy_device *pdev) |
| 127 | { |
| 128 | struct adm6996_priv *priv; |
| 129 | |
| 130 | priv = kzalloc(sizeof(struct adm6996_priv), GFP_KERNEL); |
| 131 | if (priv == NULL) |
| 132 | return -ENOMEM; |
| 133 | |
| 134 | priv->read = adm6996_read_mii_reg; |
| 135 | priv->write = adm6996_write_mii_reg; |
| 136 | pdev->priv = priv; |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | static void adm6996_remove(struct phy_device *pdev) |
| 141 | { |
| 142 | kfree(pdev->priv); |
| 143 | } |
| 144 | |
| 145 | |
| 146 | static struct phy_driver adm6996_driver = { |
| 147 | .name = "Infineon ADM6996", |
| 148 | .phy_id = (ADM_SIG0_VAL << 16) | ADM_SIG1_VAL, |
| 149 | .phy_id_mask = 0xffffffff, |
| 150 | .features = PHY_BASIC_FEATURES, |
| 151 | .probe = adm6996_probe, |
| 152 | .remove = adm6996_remove, |
| 153 | .config_init = &adm6996_config_init, |
| 154 | .config_aneg = &adm6996_config_aneg, |
| 155 | .read_status = &adm6996_read_status, |
| 156 | .driver = { .owner = THIS_MODULE,}, |
| 157 | }; |
| 158 | |
| 159 | static int __init adm6996_init(void) |
| 160 | { |
| 161 | phy_register_fixup_for_id(PHY_ANY_ID, adm6996_fixup); |
| 162 | return phy_driver_register(&adm6996_driver); |
| 163 | } |
| 164 | |
| 165 | static void __exit adm6996_exit(void) |
| 166 | { |
| 167 | phy_driver_unregister(&adm6996_driver); |
| 168 | } |
| 169 | |
| 170 | module_init(adm6996_init); |
| 171 | module_exit(adm6996_exit); |
| 172 | |
