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 #define IP101A_G_IRQ_CONF_STATUS 0x11 /* Conf Info IRQ & Status Reg */ 44 #define IP101A_G_IRQ_PIN_USED (1<<15) /* INTR pin used */ 45 #define IP101A_G_IRQ_DEFAULT IP101A_G_IRQ_PIN_USED 46 47 static int ip175c_config_init(struct phy_device *phydev) 48 { 49 int err, i; 50 static int full_reset_performed = 0; 51 52 if (full_reset_performed == 0) { 53 54 /* master reset */ 55 err = mdiobus_write(phydev->bus, 30, 0, 0x175c); 56 if (err < 0) 57 return err; 58 59 /* ensure no bus delays overlap reset period */ 60 err = mdiobus_read(phydev->bus, 30, 0); 61 62 /* data sheet specifies reset period is 2 msec */ 63 mdelay(2); 64 65 /* enable IP175C mode */ 66 err = mdiobus_write(phydev->bus, 29, 31, 0x175c); 67 if (err < 0) 68 return err; 69 70 /* Set MII0 speed and duplex (in PHY mode) */ 71 err = mdiobus_write(phydev->bus, 29, 22, 0x420); 72 if (err < 0) 73 return err; 74 75 /* reset switch ports */ 76 for (i = 0; i < 5; i++) { 77 err = mdiobus_write(phydev->bus, i, 78 MII_BMCR, BMCR_RESET); 79 if (err < 0) 80 return err; 81 } 82 83 for (i = 0; i < 5; i++) 84 err = mdiobus_read(phydev->bus, i, MII_BMCR); 85 86 mdelay(2); 87 88 full_reset_performed = 1; 89 } 90 91 if (phydev->addr != 4) { 92 phydev->state = PHY_RUNNING; 93 phydev->speed = SPEED_100; 94 phydev->duplex = DUPLEX_FULL; 95 phydev->link = 1; 96 netif_carrier_on(phydev->attached_dev); 97 } 98 99 return 0; 100 } 101 102 static int ip1xx_reset(struct phy_device *phydev) 103 { 104 int bmcr; 105 106 /* Software Reset PHY */ 107 bmcr = phy_read(phydev, MII_BMCR); 108 if (bmcr < 0) 109 return bmcr; 110 bmcr |= BMCR_RESET; 111 bmcr = phy_write(phydev, MII_BMCR, bmcr); 112 if (bmcr < 0) 113 return bmcr; 114 115 do { 116 bmcr = phy_read(phydev, MII_BMCR); 117 if (bmcr < 0) 118 return bmcr; 119 } while (bmcr & BMCR_RESET); 120 121 return 0; 122 } 123 124 static int ip1001_config_init(struct phy_device *phydev) 125 { 126 int c; 127 128 c = ip1xx_reset(phydev); 129 if (c < 0) 130 return c; 131 132 /* Enable Auto Power Saving mode */ 133 c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2); 134 if (c < 0) 135 return c; 136 c |= IP1001_APS_ON; 137 c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c); 138 if (c < 0) 139 return c; 140 141 /* INTR pin used: speed/link/duplex will cause an interrupt */ 142 c = phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, IP101A_G_IRQ_DEFAULT); 143 if (c < 0) 144 return c; 145 146 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) { 147 /* Additional delay (2ns) used to adjust RX clock phase 148 * at RGMII interface */ 149 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS); 150 if (c < 0) 151 return c; 152 153 c |= IP1001_PHASE_SEL_MASK; 154 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c); 155 if (c < 0) 156 return c; 157 } 158 159 return 0; 160 } 161 162 static int ip101a_g_config_init(struct phy_device *phydev) 163 { 164 int c; 165 166 c = ip1xx_reset(phydev); 167 if (c < 0) 168 return c; 169 170 /* Enable Auto Power Saving mode */ 171 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS); 172 c |= IP101A_G_APS_ON; 173 174 return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c); 175 } 176 177 static int ip175c_read_status(struct phy_device *phydev) 178 { 179 if (phydev->addr == 4) /* WAN port */ 180 genphy_read_status(phydev); 181 else 182 /* Don't need to read status for switch ports */ 183 phydev->irq = PHY_IGNORE_INTERRUPT; 184 185 return 0; 186 } 187 188 static int ip175c_config_aneg(struct phy_device *phydev) 189 { 190 if (phydev->addr == 4) /* WAN port */ 191 genphy_config_aneg(phydev); 192 193 return 0; 194 } 195 196 static int ip101a_g_ack_interrupt(struct phy_device *phydev) 197 { 198 int err = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS); 199 if (err < 0) 200 return err; 201 202 return 0; 203 } 204 205 static struct phy_driver icplus_driver[] = { 206 { 207 .phy_id = 0x02430d80, 208 .name = "ICPlus IP175C", 209 .phy_id_mask = 0x0ffffff0, 210 .features = PHY_BASIC_FEATURES, 211 .config_init = &ip175c_config_init, 212 .config_aneg = &ip175c_config_aneg, 213 .read_status = &ip175c_read_status, 214 .suspend = genphy_suspend, 215 .resume = genphy_resume, 216 .driver = { .owner = THIS_MODULE,}, 217 }, { 218 .phy_id = 0x02430d90, 219 .name = "ICPlus IP1001", 220 .phy_id_mask = 0x0ffffff0, 221 .features = PHY_GBIT_FEATURES | SUPPORTED_Pause | 222 SUPPORTED_Asym_Pause, 223 .config_init = &ip1001_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 .phy_id = 0x02430c54, 231 .name = "ICPlus IP101A/G", 232 .phy_id_mask = 0x0ffffff0, 233 .features = PHY_BASIC_FEATURES | SUPPORTED_Pause | 234 SUPPORTED_Asym_Pause, 235 .flags = PHY_HAS_INTERRUPT, 236 .ack_interrupt = ip101a_g_ack_interrupt, 237 .config_init = &ip101a_g_config_init, 238 .config_aneg = &genphy_config_aneg, 239 .read_status = &genphy_read_status, 240 .suspend = genphy_suspend, 241 .resume = genphy_resume, 242 .driver = { .owner = THIS_MODULE,}, 243 } }; 244 245 static int __init icplus_init(void) 246 { 247 return phy_drivers_register(icplus_driver, 248 ARRAY_SIZE(icplus_driver)); 249 } 250 251 static void __exit icplus_exit(void) 252 { 253 phy_drivers_unregister(icplus_driver, 254 ARRAY_SIZE(icplus_driver)); 255 } 256 257 module_init(icplus_init); 258 module_exit(icplus_exit); 259 260 static struct mdio_device_id __maybe_unused icplus_tbl[] = { 261 { 0x02430d80, 0x0ffffff0 }, 262 { 0x02430d90, 0x0ffffff0 }, 263 { 0x02430c54, 0x0ffffff0 }, 264 { } 265 }; 266 267 MODULE_DEVICE_TABLE(mdio, icplus_tbl); 268