2 * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
4 * Copyright (c) 2003 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
7 * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
8 * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
10 * Released under the GPL
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/ptrace.h>
18 #include <linux/errno.h>
19 #include <linux/ioport.h>
20 #include <linux/slab.h>
21 #include <linux/interrupt.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
27 #include <linux/spinlock.h>
28 #include <linux/mii.h>
29 #include <linux/ethtool.h>
30 #include <linux/bitops.h>
32 #include <asm/8xx_immap.h>
33 #include <asm/pgtable.h>
34 #include <asm/mpc8xx.h>
36 #include <asm/uaccess.h>
39 /*************************************************/
43 /*************************************************/
45 /* Make MII read/write commands for the FEC.
47 #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
48 #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
51 /*************************************************/
53 /* XXX both FECs use the MII interface of FEC1 */
54 static DEFINE_SPINLOCK(fec_mii_lock);
56 #define FEC_MII_LOOPS 10000
58 int fec_mii_read(struct net_device *dev, int phy_id, int location)
60 struct fec_enet_private *fep = netdev_priv(dev);
65 /* XXX MII interface is only connected to FEC1 */
66 fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec;
68 spin_lock_irqsave(&fec_mii_lock, flags);
70 if ((FR(fecp, r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) {
71 FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
72 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
73 FW(fecp, ievent, FEC_ENET_MII);
76 /* Add PHY address to register command. */
77 FW(fecp, mii_speed, fep->fec_phy_speed);
78 FW(fecp, mii_data, (phy_id << 23) | mk_mii_read(location));
80 for (i = 0; i < FEC_MII_LOOPS; i++)
81 if ((FR(fecp, ievent) & FEC_ENET_MII) != 0)
84 if (i < FEC_MII_LOOPS) {
85 FW(fecp, ievent, FEC_ENET_MII);
86 ret = FR(fecp, mii_data) & 0xffff;
89 spin_unlock_irqrestore(&fec_mii_lock, flags);
94 void fec_mii_write(struct net_device *dev, int phy_id, int location, int value)
96 struct fec_enet_private *fep = netdev_priv(dev);
101 /* XXX MII interface is only connected to FEC1 */
102 fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec;
104 spin_lock_irqsave(&fec_mii_lock, flags);
106 if ((FR(fecp, r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) {
107 FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
108 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
109 FW(fecp, ievent, FEC_ENET_MII);
112 /* Add PHY address to register command. */
113 FW(fecp, mii_speed, fep->fec_phy_speed); /* always adapt mii speed */
114 FW(fecp, mii_data, (phy_id << 23) | mk_mii_write(location, value));
116 for (i = 0; i < FEC_MII_LOOPS; i++)
117 if ((FR(fecp, ievent) & FEC_ENET_MII) != 0)
120 if (i < FEC_MII_LOOPS)
121 FW(fecp, ievent, FEC_ENET_MII);
123 spin_unlock_irqrestore(&fec_mii_lock, flags);
126 /*************************************************/
128 #ifdef CONFIG_FEC_8XX_GENERIC_PHY
131 * Generic PHY support.
132 * Should work for all PHYs, but link change is detected by polling
135 static void generic_timer_callback(unsigned long data)
137 struct net_device *dev = (struct net_device *)data;
138 struct fec_enet_private *fep = netdev_priv(dev);
140 fep->phy_timer_list.expires = jiffies + HZ / 2;
142 add_timer(&fep->phy_timer_list);
144 fec_mii_link_status_change_check(dev, 0);
147 static void generic_startup(struct net_device *dev)
149 struct fec_enet_private *fep = netdev_priv(dev);
151 fep->phy_timer_list.expires = jiffies + HZ / 2; /* every 500ms */
152 fep->phy_timer_list.data = (unsigned long)dev;
153 fep->phy_timer_list.function = generic_timer_callback;
154 add_timer(&fep->phy_timer_list);
157 static void generic_shutdown(struct net_device *dev)
159 struct fec_enet_private *fep = netdev_priv(dev);
161 del_timer_sync(&fep->phy_timer_list);
166 #ifdef CONFIG_FEC_8XX_DM9161_PHY
168 /* ------------------------------------------------------------------------- */
169 /* The Davicom DM9161 is used on the NETTA board */
171 /* register definitions */
173 #define MII_DM9161_ACR 16 /* Aux. Config Register */
174 #define MII_DM9161_ACSR 17 /* Aux. Config/Status Register */
175 #define MII_DM9161_10TCSR 18 /* 10BaseT Config/Status Reg. */
176 #define MII_DM9161_INTR 21 /* Interrupt Register */
177 #define MII_DM9161_RECR 22 /* Receive Error Counter Reg. */
178 #define MII_DM9161_DISCR 23 /* Disconnect Counter Register */
180 static void dm9161_startup(struct net_device *dev)
182 struct fec_enet_private *fep = netdev_priv(dev);
184 fec_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0000);
187 static void dm9161_ack_int(struct net_device *dev)
189 struct fec_enet_private *fep = netdev_priv(dev);
191 fec_mii_read(dev, fep->mii_if.phy_id, MII_DM9161_INTR);
194 static void dm9161_shutdown(struct net_device *dev)
196 struct fec_enet_private *fep = netdev_priv(dev);
198 fec_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0f00);
203 #ifdef CONFIG_FEC_8XX_LXT971_PHY
205 /* Support for LXT971/972 PHY */
207 #define MII_LXT971_PCR 16 /* Port Control Register */
208 #define MII_LXT971_SR2 17 /* Status Register 2 */
209 #define MII_LXT971_IER 18 /* Interrupt Enable Register */
210 #define MII_LXT971_ISR 19 /* Interrupt Status Register */
211 #define MII_LXT971_LCR 20 /* LED Control Register */
212 #define MII_LXT971_TCR 30 /* Transmit Control Register */
214 static void lxt971_startup(struct net_device *dev)
216 struct fec_enet_private *fep = netdev_priv(dev);
218 fec_mii_write(dev, fep->mii_if.phy_id, MII_LXT971_IER, 0x00F2);
221 static void lxt971_ack_int(struct net_device *dev)
223 struct fec_enet_private *fep = netdev_priv(dev);
225 fec_mii_read(dev, fep->mii_if.phy_id, MII_LXT971_ISR);
228 static void lxt971_shutdown(struct net_device *dev)
230 struct fec_enet_private *fep = netdev_priv(dev);
232 fec_mii_write(dev, fep->mii_if.phy_id, MII_LXT971_IER, 0x0000);
236 /**********************************************************************************/
238 static const struct phy_info phy_info[] = {
239 #ifdef CONFIG_FEC_8XX_DM9161_PHY
243 .startup = dm9161_startup,
244 .ack_int = dm9161_ack_int,
245 .shutdown = dm9161_shutdown,
248 #ifdef CONFIG_FEC_8XX_LXT971_PHY
251 .name = "LXT971/972",
252 .startup = lxt971_startup,
253 .ack_int = lxt971_ack_int,
254 .shutdown = lxt971_shutdown,
257 #ifdef CONFIG_FEC_8XX_GENERIC_PHY
261 .startup = generic_startup,
262 .shutdown = generic_shutdown,
267 /**********************************************************************************/
269 int fec_mii_phy_id_detect(struct net_device *dev)
271 struct fec_enet_private *fep = netdev_priv(dev);
272 const struct fec_platform_info *fpi = fep->fpi;
273 int i, r, start, end, phytype, physubtype;
274 const struct phy_info *phy;
275 int phy_hwid, phy_id;
278 if (fpi->use_mdio == 0)
285 if (fpi->phy_addr == -1) {
288 } else { /* direct */
289 start = fpi->phy_addr;
293 for (phy_id = start; phy_id < end; phy_id++) {
294 r = fec_mii_read(dev, phy_id, MII_PHYSID1);
295 if (r == -1 || (phytype = (r & 0xffff)) == 0xffff)
297 r = fec_mii_read(dev, phy_id, MII_PHYSID2);
298 if (r == -1 || (physubtype = (r & 0xffff)) == 0xffff)
300 phy_hwid = (phytype << 16) | physubtype;
305 if (phy_hwid == -1) {
306 printk(KERN_ERR DRV_MODULE_NAME
307 ": %s No PHY detected!\n", dev->name);
311 for (i = 0, phy = phy_info; i < ARRAY_SIZE(phy_info); i++, phy++)
312 if (phy->id == (phy_hwid >> 4) || phy->id == 0)
315 if (i >= ARRAY_SIZE(phy_info)) {
316 printk(KERN_ERR DRV_MODULE_NAME
317 ": %s PHY id 0x%08x is not supported!\n",
318 dev->name, phy_hwid);
324 printk(KERN_INFO DRV_MODULE_NAME
325 ": %s Phy @ 0x%x, type %s (0x%08x)\n",
326 dev->name, phy_id, fep->phy->name, phy_hwid);
331 void fec_mii_startup(struct net_device *dev)
333 struct fec_enet_private *fep = netdev_priv(dev);
334 const struct fec_platform_info *fpi = fep->fpi;
336 if (!fpi->use_mdio || fep->phy == NULL)
339 if (fep->phy->startup == NULL)
342 (*fep->phy->startup) (dev);
345 void fec_mii_shutdown(struct net_device *dev)
347 struct fec_enet_private *fep = netdev_priv(dev);
348 const struct fec_platform_info *fpi = fep->fpi;
350 if (!fpi->use_mdio || fep->phy == NULL)
353 if (fep->phy->shutdown == NULL)
356 (*fep->phy->shutdown) (dev);
359 void fec_mii_ack_int(struct net_device *dev)
361 struct fec_enet_private *fep = netdev_priv(dev);
362 const struct fec_platform_info *fpi = fep->fpi;
364 if (!fpi->use_mdio || fep->phy == NULL)
367 if (fep->phy->ack_int == NULL)
370 (*fep->phy->ack_int) (dev);
373 /* helper function */
374 static int mii_negotiated(struct mii_if_info *mii)
376 int advert, lpa, val;
378 if (!mii_link_ok(mii))
381 val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
382 if ((val & BMSR_ANEGCOMPLETE) == 0)
385 advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
386 lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
388 return mii_nway_result(advert & lpa);
391 void fec_mii_link_status_change_check(struct net_device *dev, int init_media)
393 struct fec_enet_private *fep = netdev_priv(dev);
397 if (mii_check_media(&fep->mii_if, netif_msg_link(fep), init_media) == 0)
400 media = mii_negotiated(&fep->mii_if);
402 if (netif_carrier_ok(dev)) {
403 spin_lock_irqsave(&fep->lock, flags);
404 fec_restart(dev, !!(media & ADVERTISE_FULL),
405 (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)) ?
407 spin_unlock_irqrestore(&fep->lock, flags);
409 netif_start_queue(dev);
411 netif_stop_queue(dev);
413 spin_lock_irqsave(&fep->lock, flags);
415 spin_unlock_irqrestore(&fep->lock, flags);