1 /*****************************************************************************
5 * $Date: 2005/04/15 19:27:14 $ *
7 * Marvell PHY (mv88x201x) functionality. *
8 * part of the Chelsio 10Gb Ethernet Driver. *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License, version 2, as *
12 * published by the Free Software Foundation. *
14 * You should have received a copy of the GNU General Public License along *
15 * with this program; if not, write to the Free Software Foundation, Inc., *
16 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED *
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF *
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. *
22 * http://www.chelsio.com *
24 * Copyright (c) 2003 - 2005 Chelsio Communications, Inc. *
25 * All rights reserved. *
38 ****************************************************************************/
44 * The 88x2010 Rev C. requires some link status registers * to be read
45 * twice in order to get the right values. Future * revisions will fix
46 * this problem and then this macro * can disappear.
48 #define MV88x2010_LINK_STATUS_BUGS 1
50 static int led_init(struct cphy *cphy)
52 /* Setup the LED registers so we can turn on/off.
53 * Writing these bits maps control to another
54 * register. mmd(0x1) addr(0x7)
56 cphy_mdio_write(cphy, MDIO_MMD_PCS, 0x8304, 0xdddd);
60 static int led_link(struct cphy *cphy, u32 do_enable)
63 #define LINK_ENABLE_BIT 0x1
65 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, &led);
67 if (do_enable & LINK_ENABLE_BIT) {
68 led |= LINK_ENABLE_BIT;
69 cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, led);
71 led &= ~LINK_ENABLE_BIT;
72 cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, led);
78 static int mv88x201x_reset(struct cphy *cphy, int wait)
80 /* This can be done through registers. It is not required since
81 * a full chip reset is used.
86 static int mv88x201x_interrupt_enable(struct cphy *cphy)
88 /* Enable PHY LASI interrupts. */
89 cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL,
90 MDIO_PMA_LASI_LSALARM);
92 /* Enable Marvell interrupts through Elmer0. */
93 if (t1_is_asic(cphy->adapter)) {
96 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
97 elmer |= ELMER0_GP_BIT6;
98 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
103 static int mv88x201x_interrupt_disable(struct cphy *cphy)
105 /* Disable PHY LASI interrupts. */
106 cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL, 0x0);
108 /* Disable Marvell interrupts through Elmer0. */
109 if (t1_is_asic(cphy->adapter)) {
112 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
113 elmer &= ~ELMER0_GP_BIT6;
114 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
119 static int mv88x201x_interrupt_clear(struct cphy *cphy)
124 #ifdef MV88x2010_LINK_STATUS_BUGS
125 /* Required to read twice before clear takes affect. */
126 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_RXSTAT, &val);
127 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_TXSTAT, &val);
128 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT, &val);
130 /* Read this register after the others above it else
131 * the register doesn't clear correctly.
133 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
136 /* Clear link status. */
137 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
138 /* Clear PHY LASI interrupts. */
139 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT, &val);
141 #ifdef MV88x2010_LINK_STATUS_BUGS
143 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_RXSTAT, &val);
144 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_TXSTAT, &val);
147 /* Clear Marvell interrupts through Elmer0. */
148 if (t1_is_asic(cphy->adapter)) {
149 t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer);
150 elmer |= ELMER0_GP_BIT6;
151 t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer);
156 static int mv88x201x_interrupt_handler(struct cphy *cphy)
158 /* Clear interrupts */
159 mv88x201x_interrupt_clear(cphy);
161 /* We have only enabled link change interrupts and so
162 * cphy_cause must be a link change interrupt.
164 return cphy_cause_link_change;
167 static int mv88x201x_set_loopback(struct cphy *cphy, int on)
172 static int mv88x201x_get_link_status(struct cphy *cphy, int *link_ok,
173 int *speed, int *duplex, int *fc)
178 /* Read link status. */
179 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
180 val &= MDIO_STAT1_LSTATUS;
181 *link_ok = (val == MDIO_STAT1_LSTATUS);
182 /* Turn on/off Link LED */
183 led_link(cphy, *link_ok);
186 *speed = SPEED_10000;
188 *duplex = DUPLEX_FULL;
190 *fc = PAUSE_RX | PAUSE_TX;
194 static void mv88x201x_destroy(struct cphy *cphy)
199 static struct cphy_ops mv88x201x_ops = {
200 .destroy = mv88x201x_destroy,
201 .reset = mv88x201x_reset,
202 .interrupt_enable = mv88x201x_interrupt_enable,
203 .interrupt_disable = mv88x201x_interrupt_disable,
204 .interrupt_clear = mv88x201x_interrupt_clear,
205 .interrupt_handler = mv88x201x_interrupt_handler,
206 .get_link_status = mv88x201x_get_link_status,
207 .set_loopback = mv88x201x_set_loopback,
208 .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
209 MDIO_DEVS_PHYXS | MDIO_DEVS_WIS),
212 static struct cphy *mv88x201x_phy_create(struct net_device *dev, int phy_addr,
213 const struct mdio_ops *mdio_ops)
216 struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL);
221 cphy_init(cphy, dev, phy_addr, &mv88x201x_ops, mdio_ops);
223 /* Commands the PHY to enable XFP's clock. */
224 cphy_mdio_read(cphy, MDIO_MMD_PCS, 0x8300, &val);
225 cphy_mdio_write(cphy, MDIO_MMD_PCS, 0x8300, val | 1);
227 /* Clear link status. Required because of a bug in the PHY. */
228 cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT2, &val);
229 cphy_mdio_read(cphy, MDIO_MMD_PCS, MDIO_STAT2, &val);
231 /* Allows for Link,Ack LED turn on/off */
237 static int mv88x201x_phy_reset(adapter_t *adapter)
241 t1_tpi_read(adapter, A_ELMER0_GPO, &val);
243 t1_tpi_write(adapter, A_ELMER0_GPO, val);
246 t1_tpi_write(adapter, A_ELMER0_GPO, val | 4);
249 /* Now lets enable the Laser. Delay 100us */
250 t1_tpi_read(adapter, A_ELMER0_GPO, &val);
252 t1_tpi_write(adapter, A_ELMER0_GPO, val);
257 const struct gphy t1_mv88x201x_ops = {
258 .create = mv88x201x_phy_create,
259 .reset = mv88x201x_phy_reset