1 /* 2 * Driver for ICPlus PHYs 3 * 4 * Copyright (c) 2007 Freescale Semiconductor, Inc. 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 as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 */ 12 #include <linux/kernel.h> 13 #include <linux/string.h> 14 #include <linux/errno.h> 15 #include <linux/unistd.h> 16 #include <linux/interrupt.h> 17 #include <linux/init.h> 18 #include <linux/delay.h> 19 #include <linux/netdevice.h> 20 #include <linux/etherdevice.h> 21 #include <linux/skbuff.h> 22 #include <linux/spinlock.h> 23 #include <linux/mm.h> 24 #include <linux/module.h> 25 #include <linux/mii.h> 26 #include <linux/ethtool.h> 27 #include <linux/phy.h> 28 29 #include <asm/io.h> 30 #include <asm/irq.h> 31 #include <asm/uaccess.h> 32 33 MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IP101G/IC1001 PHY drivers"); 34 MODULE_AUTHOR("Michael Barkowski"); 35 MODULE_LICENSE("GPL"); 36 37 /* IP101A/G - IP1001 */ 38 #define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */ 39 #define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */ 40 #define IP1001_PHASE_SEL_MASK 3 /* IP1001 RX/TXPHASE_SEL */ 41 #define IP1001_APS_ON 11 /* IP1001 APS Mode bit */ 42 #define IP101A_G_APS_ON 2 /* IP101A/G APS Mode bit */ 43 44 static int ip175c_config_init(struct phy_device *phydev) 45 { 46 int err, i; 47 static int full_reset_performed = 0; 48 49 if (full_reset_performed == 0) { 50 51 /* master reset */ 52 err = mdiobus_write(phydev->bus, 30, 0, 0x175c); 53 if (err < 0) 54 return err; 55 56 /* ensure no bus delays overlap reset period */ 57 err = mdiobus_read(phydev->bus, 30, 0); 58 59 /* data sheet specifies reset period is 2 msec */ 60 mdelay(2); 61 62 /* enable IP175C mode */ 63 err = mdiobus_write(phydev->bus, 29, 31, 0x175c); 64 if (err < 0) 65 return err; 66 67 /* Set MII0 speed and duplex (in PHY mode) */ 68 err = mdiobus_write(phydev->bus, 29, 22, 0x420); 69 if (err < 0) 70 return err; 71 72 /* reset switch ports */ 73 for (i = 0; i < 5; i++) { 74 err = mdiobus_write(phydev->bus, i, 75 MII_BMCR, BMCR_RESET); 76 if (err < 0) 77 return err; 78 } 79 80 for (i = 0; i < 5; i++) 81 err = mdiobus_read(phydev->bus, i, MII_BMCR); 82 83 mdelay(2); 84 85 full_reset_performed = 1; 86 } 87 88 if (phydev->addr != 4) { 89 phydev->state = PHY_RUNNING; 90 phydev->speed = SPEED_100; 91 phydev->duplex = DUPLEX_FULL; 92 phydev->link = 1; 93 netif_carrier_on(phydev->attached_dev); 94 } 95 96 return 0; 97 } 98 99 static int ip1xx_reset(struct phy_device *phydev) 100 { 101 int bmcr; 102 103 /* Software Reset PHY */ 104 bmcr = phy_read(phydev, MII_BMCR); 105 if (bmcr < 0) 106 return bmcr; 107 bmcr |= BMCR_RESET; 108 bmcr = phy_write(phydev, MII_BMCR, bmcr); 109 if (bmcr < 0) 110 return bmcr; 111 112 do { 113 bmcr = phy_read(phydev, MII_BMCR); 114 if (bmcr < 0) 115 return bmcr; 116 } while (bmcr & BMCR_RESET); 117 118 return 0; 119 } 120 121 static int ip1001_config_init(struct phy_device *phydev) 122 { 123 int c; 124 125 c = ip1xx_reset(phydev); 126 if (c < 0) 127 return c; 128 129 /* Enable Auto Power Saving mode */ 130 c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2); 131 if (c < 0) 132 return c; 133 c |= IP1001_APS_ON; 134 c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c); 135 if (c < 0) 136 return c; 137 138 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) { 139 /* Additional delay (2ns) used to adjust RX clock phase 140 * at RGMII interface */ 141 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS); 142 if (c < 0) 143 return c; 144 145 c |= IP1001_PHASE_SEL_MASK; 146 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c); 147 if (c < 0) 148 return c; 149 } 150 151 return 0; 152 } 153 154 static int ip101a_g_config_init(struct phy_device *phydev) 155 { 156 int c; 157 158 c = ip1xx_reset(phydev); 159 if (c < 0) 160 return c; 161 162 /* Enable Auto Power Saving mode */ 163 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS); 164 c |= IP101A_G_APS_ON; 165 166 return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c); 167 } 168 169 static int ip175c_read_status(struct phy_device *phydev) 170 { 171 if (phydev->addr == 4) /* WAN port */ 172 genphy_read_status(phydev); 173 else 174 /* Don't need to read status for switch ports */ 175 phydev->irq = PHY_IGNORE_INTERRUPT; 176 177 return 0; 178 } 179 180 static int ip175c_config_aneg(struct phy_device *phydev) 181 { 182 if (phydev->addr == 4) /* WAN port */ 183 genphy_config_aneg(phydev); 184 185 return 0; 186 } 187 188 static struct phy_driver ip175c_driver = { 189 .phy_id = 0x02430d80, 190 .name = "ICPlus IP175C", 191 .phy_id_mask = 0x0ffffff0, 192 .features = PHY_BASIC_FEATURES, 193 .config_init = &ip175c_config_init, 194 .config_aneg = &ip175c_config_aneg, 195 .read_status = &ip175c_read_status, 196 .suspend = genphy_suspend, 197 .resume = genphy_resume, 198 .driver = { .owner = THIS_MODULE,}, 199 }; 200 201 static struct phy_driver ip1001_driver = { 202 .phy_id = 0x02430d90, 203 .name = "ICPlus IP1001", 204 .phy_id_mask = 0x0ffffff0, 205 .features = PHY_GBIT_FEATURES | SUPPORTED_Pause | 206 SUPPORTED_Asym_Pause, 207 .flags = PHY_HAS_INTERRUPT, 208 .config_init = &ip1001_config_init, 209 .config_aneg = &genphy_config_aneg, 210 .read_status = &genphy_read_status, 211 .suspend = genphy_suspend, 212 .resume = genphy_resume, 213 .driver = { .owner = THIS_MODULE,}, 214 }; 215 216 static struct phy_driver ip101a_g_driver = { 217 .phy_id = 0x02430c54, 218 .name = "ICPlus IP101A/G", 219 .phy_id_mask = 0x0ffffff0, 220 .features = PHY_BASIC_FEATURES | SUPPORTED_Pause | 221 SUPPORTED_Asym_Pause, 222 .flags = PHY_HAS_INTERRUPT, 223 .config_init = &ip101a_g_config_init, 224 .config_aneg = &genphy_config_aneg, 225 .read_status = &genphy_read_status, 226 .suspend = genphy_suspend, 227 .resume = genphy_resume, 228 .driver = { .owner = THIS_MODULE,}, 229 }; 230 231 static int __init icplus_init(void) 232 { 233 int ret = 0; 234 235 ret = phy_driver_register(&ip1001_driver); 236 if (ret < 0) 237 return -ENODEV; 238 239 ret = phy_driver_register(&ip101a_g_driver); 240 if (ret < 0) 241 return -ENODEV; 242 243 return phy_driver_register(&ip175c_driver); 244 } 245 246 static void __exit icplus_exit(void) 247 { 248 phy_driver_unregister(&ip1001_driver); 249 phy_driver_unregister(&ip101a_g_driver); 250 phy_driver_unregister(&ip175c_driver); 251 } 252 253 module_init(icplus_init); 254 module_exit(icplus_exit); 255 256 static struct mdio_device_id __maybe_unused icplus_tbl[] = { 257 { 0x02430d80, 0x0ffffff0 }, 258 { 0x02430d90, 0x0ffffff0 }, 259 { 0x02430c54, 0x0ffffff0 }, 260 { } 261 }; 262 263 MODULE_DEVICE_TABLE(mdio, icplus_tbl); 264