2 * Driver for ICPlus PHYs
4 * Copyright (c) 2007 Freescale Semiconductor, Inc.
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.
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>
24 #include <linux/module.h>
25 #include <linux/mii.h>
26 #include <linux/ethtool.h>
27 #include <linux/phy.h>
31 #include <linux/uaccess.h>
33 MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IP101G/IC1001 PHY drivers");
34 MODULE_AUTHOR("Michael Barkowski");
35 MODULE_LICENSE("GPL");
37 /* IP101A/G - IP1001 */
38 #define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */
39 #define IP1001_RXPHASE_SEL (1<<0) /* Add delay on RX_CLK */
40 #define IP1001_TXPHASE_SEL (1<<1) /* Add delay on TX_CLK */
41 #define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */
42 #define IP1001_APS_ON 11 /* IP1001 APS Mode bit */
43 #define IP101A_G_APS_ON 2 /* IP101A/G APS Mode bit */
44 #define IP101A_G_IRQ_CONF_STATUS 0x11 /* Conf Info IRQ & Status Reg */
45 #define IP101A_G_IRQ_PIN_USED (1<<15) /* INTR pin used */
46 #define IP101A_G_IRQ_DEFAULT IP101A_G_IRQ_PIN_USED
48 static int ip175c_config_init(struct phy_device *phydev)
51 static int full_reset_performed;
53 if (full_reset_performed == 0) {
56 err = mdiobus_write(phydev->mdio.bus, 30, 0, 0x175c);
60 /* ensure no bus delays overlap reset period */
61 err = mdiobus_read(phydev->mdio.bus, 30, 0);
63 /* data sheet specifies reset period is 2 msec */
66 /* enable IP175C mode */
67 err = mdiobus_write(phydev->mdio.bus, 29, 31, 0x175c);
71 /* Set MII0 speed and duplex (in PHY mode) */
72 err = mdiobus_write(phydev->mdio.bus, 29, 22, 0x420);
76 /* reset switch ports */
77 for (i = 0; i < 5; i++) {
78 err = mdiobus_write(phydev->mdio.bus, i,
79 MII_BMCR, BMCR_RESET);
84 for (i = 0; i < 5; i++)
85 err = mdiobus_read(phydev->mdio.bus, i, MII_BMCR);
89 full_reset_performed = 1;
92 if (phydev->mdio.addr != 4) {
93 phydev->state = PHY_RUNNING;
94 phydev->speed = SPEED_100;
95 phydev->duplex = DUPLEX_FULL;
97 netif_carrier_on(phydev->attached_dev);
103 static int ip1xx_reset(struct phy_device *phydev)
107 /* Software Reset PHY */
108 bmcr = phy_read(phydev, MII_BMCR);
112 bmcr = phy_write(phydev, MII_BMCR, bmcr);
117 bmcr = phy_read(phydev, MII_BMCR);
120 } while (bmcr & BMCR_RESET);
125 static int ip1001_config_init(struct phy_device *phydev)
129 c = ip1xx_reset(phydev);
133 /* Enable Auto Power Saving mode */
134 c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
138 c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
142 if (phy_interface_is_rgmii(phydev)) {
144 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
148 c &= ~(IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
150 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
151 c |= (IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
152 else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
153 c |= IP1001_RXPHASE_SEL;
154 else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
155 c |= IP1001_TXPHASE_SEL;
157 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
165 static int ip101a_g_config_init(struct phy_device *phydev)
169 c = ip1xx_reset(phydev);
173 /* INTR pin used: speed/link/duplex will cause an interrupt */
174 c = phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, IP101A_G_IRQ_DEFAULT);
178 /* Enable Auto Power Saving mode */
179 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
180 c |= IP101A_G_APS_ON;
182 return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
185 static int ip175c_read_status(struct phy_device *phydev)
187 if (phydev->mdio.addr == 4) /* WAN port */
188 genphy_read_status(phydev);
190 /* Don't need to read status for switch ports */
191 phydev->irq = PHY_IGNORE_INTERRUPT;
196 static int ip175c_config_aneg(struct phy_device *phydev)
198 if (phydev->mdio.addr == 4) /* WAN port */
199 genphy_config_aneg(phydev);
204 static int ip101a_g_ack_interrupt(struct phy_device *phydev)
206 int err = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS);
213 static struct phy_driver icplus_driver[] = {
215 .phy_id = 0x02430d80,
216 .name = "ICPlus IP175C",
217 .phy_id_mask = 0x0ffffff0,
218 .features = PHY_BASIC_FEATURES,
219 .config_init = &ip175c_config_init,
220 .config_aneg = &ip175c_config_aneg,
221 .read_status = &ip175c_read_status,
222 .suspend = genphy_suspend,
223 .resume = genphy_resume,
225 .phy_id = 0x02430d90,
226 .name = "ICPlus IP1001",
227 .phy_id_mask = 0x0ffffff0,
228 .features = PHY_GBIT_FEATURES,
229 .config_init = &ip1001_config_init,
230 .suspend = genphy_suspend,
231 .resume = genphy_resume,
233 .phy_id = 0x02430c54,
234 .name = "ICPlus IP101A/G",
235 .phy_id_mask = 0x0ffffff0,
236 .features = PHY_BASIC_FEATURES,
237 .flags = PHY_HAS_INTERRUPT,
238 .ack_interrupt = ip101a_g_ack_interrupt,
239 .config_init = &ip101a_g_config_init,
240 .suspend = genphy_suspend,
241 .resume = genphy_resume,
244 module_phy_driver(icplus_driver);
246 static struct mdio_device_id __maybe_unused icplus_tbl[] = {
247 { 0x02430d80, 0x0ffffff0 },
248 { 0x02430d90, 0x0ffffff0 },
249 { 0x02430c54, 0x0ffffff0 },
253 MODULE_DEVICE_TABLE(mdio, icplus_tbl);