2 * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
3 * Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
5 * Right now, I am very wasteful with the buffers. I allocate memory
6 * pages and then divide them into 2K frame buffers. This way I know I
7 * have buffers large enough to hold one frame within one buffer descriptor.
8 * Once I get this working, I will use 64 or 128 byte CPM buffers, which
9 * will be much more memory efficient and will easily handle lots of
12 * Much better multiple PHY support by Magnus Damm.
13 * Copyright (c) 2000 Ericsson Radio Systems AB.
15 * Support for FEC controller of ColdFire processors.
16 * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com)
18 * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
19 * Copyright (c) 2004-2006 Macq Electronique SA.
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/string.h>
25 #include <linux/ptrace.h>
26 #include <linux/errno.h>
27 #include <linux/ioport.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/delay.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/spinlock.h>
37 #include <linux/workqueue.h>
38 #include <linux/bitops.h>
40 #include <linux/irq.h>
41 #include <linux/clk.h>
42 #include <linux/platform_device.h>
44 #include <asm/cacheflush.h>
46 #ifndef CONFIG_ARCH_MXC
47 #include <asm/coldfire.h>
48 #include <asm/mcfsim.h>
53 #ifdef CONFIG_ARCH_MXC
54 #include <mach/hardware.h>
55 #define FEC_ALIGNMENT 0xf
57 #define FEC_ALIGNMENT 0x3
61 * Define the fixed address of the FEC hardware.
63 #if defined(CONFIG_M5272)
64 #define HAVE_mii_link_interrupt
66 static unsigned char fec_mac_default[] = {
67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
71 * Some hardware gets it MAC address out of local flash memory.
72 * if this is non-zero then assume it is the address to get MAC from.
74 #if defined(CONFIG_NETtel)
75 #define FEC_FLASHMAC 0xf0006006
76 #elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES)
77 #define FEC_FLASHMAC 0xf0006000
78 #elif defined(CONFIG_CANCam)
79 #define FEC_FLASHMAC 0xf0020000
80 #elif defined (CONFIG_M5272C3)
81 #define FEC_FLASHMAC (0xffe04000 + 4)
82 #elif defined(CONFIG_MOD5272)
83 #define FEC_FLASHMAC 0xffc0406b
85 #define FEC_FLASHMAC 0
87 #endif /* CONFIG_M5272 */
89 /* Forward declarations of some structures to support different PHYs
94 void (*funct)(uint mii_reg, struct net_device *dev);
101 const phy_cmd_t *config;
102 const phy_cmd_t *startup;
103 const phy_cmd_t *ack_int;
104 const phy_cmd_t *shutdown;
107 /* The number of Tx and Rx buffers. These are allocated from the page
108 * pool. The code may assume these are power of two, so it it best
109 * to keep them that size.
110 * We don't need to allocate pages for the transmitter. We just use
111 * the skbuffer directly.
113 #define FEC_ENET_RX_PAGES 8
114 #define FEC_ENET_RX_FRSIZE 2048
115 #define FEC_ENET_RX_FRPPG (PAGE_SIZE / FEC_ENET_RX_FRSIZE)
116 #define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
117 #define FEC_ENET_TX_FRSIZE 2048
118 #define FEC_ENET_TX_FRPPG (PAGE_SIZE / FEC_ENET_TX_FRSIZE)
119 #define TX_RING_SIZE 16 /* Must be power of two */
120 #define TX_RING_MOD_MASK 15 /* for this to work */
122 #if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE)
123 #error "FEC: descriptor ring size constants too large"
126 /* Interrupt events/masks.
128 #define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
129 #define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
130 #define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */
131 #define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */
132 #define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */
133 #define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */
134 #define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */
135 #define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */
136 #define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */
137 #define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */
139 /* The FEC stores dest/src/type, data, and checksum for receive packets.
141 #define PKT_MAXBUF_SIZE 1518
142 #define PKT_MINBUF_SIZE 64
143 #define PKT_MAXBLR_SIZE 1520
147 * The 5270/5271/5280/5282/532x RX control register also contains maximum frame
148 * size bits. Other FEC hardware does not, so we need to take that into
149 * account when setting it.
151 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
152 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARCH_MXC)
153 #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16)
155 #define OPT_FRAME_SIZE 0
158 /* The FEC buffer descriptors track the ring buffers. The rx_bd_base and
159 * tx_bd_base always point to the base of the buffer descriptors. The
160 * cur_rx and cur_tx point to the currently available buffer.
161 * The dirty_tx tracks the current buffer that is being sent by the
162 * controller. The cur_tx and dirty_tx are equal under both completely
163 * empty and completely full conditions. The empty/ready indicator in
164 * the buffer descriptor determines the actual condition.
166 struct fec_enet_private {
167 /* Hardware registers of the FEC device */
170 struct net_device *netdev;
174 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
175 unsigned char *tx_bounce[TX_RING_SIZE];
176 struct sk_buff* tx_skbuff[TX_RING_SIZE];
180 /* CPM dual port RAM relative addresses.
183 cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
185 cbd_t *cur_rx, *cur_tx; /* The next free ring entry */
186 cbd_t *dirty_tx; /* The ring entries to be free()ed. */
188 /* hold while accessing the HW like ringbuffer for tx/rx but not MAC */
190 /* hold while accessing the mii_list_t() elements */
197 phy_info_t const *phy;
198 struct work_struct phy_task;
201 uint mii_phy_task_queued;
212 static int fec_enet_open(struct net_device *dev);
213 static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
214 static void fec_enet_mii(struct net_device *dev);
215 static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
216 static void fec_enet_tx(struct net_device *dev);
217 static void fec_enet_rx(struct net_device *dev);
218 static int fec_enet_close(struct net_device *dev);
219 static void set_multicast_list(struct net_device *dev);
220 static void fec_restart(struct net_device *dev, int duplex);
221 static void fec_stop(struct net_device *dev);
222 static void fec_set_mac_address(struct net_device *dev);
225 /* MII processing. We keep this as simple as possible. Requests are
226 * placed on the list (if there is room). When the request is finished
227 * by the MII, an optional function may be called.
229 typedef struct mii_list {
231 void (*mii_func)(uint val, struct net_device *dev);
232 struct mii_list *mii_next;
236 static mii_list_t mii_cmds[NMII];
237 static mii_list_t *mii_free;
238 static mii_list_t *mii_head;
239 static mii_list_t *mii_tail;
241 static int mii_queue(struct net_device *dev, int request,
242 void (*func)(uint, struct net_device *));
244 /* Make MII read/write commands for the FEC.
246 #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
247 #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | \
251 /* Transmitter timeout.
253 #define TX_TIMEOUT (2*HZ)
255 /* Register definitions for the PHY.
258 #define MII_REG_CR 0 /* Control Register */
259 #define MII_REG_SR 1 /* Status Register */
260 #define MII_REG_PHYIR1 2 /* PHY Identification Register 1 */
261 #define MII_REG_PHYIR2 3 /* PHY Identification Register 2 */
262 #define MII_REG_ANAR 4 /* A-N Advertisement Register */
263 #define MII_REG_ANLPAR 5 /* A-N Link Partner Ability Register */
264 #define MII_REG_ANER 6 /* A-N Expansion Register */
265 #define MII_REG_ANNPTR 7 /* A-N Next Page Transmit Register */
266 #define MII_REG_ANLPRNPR 8 /* A-N Link Partner Received Next Page Reg. */
268 /* values for phy_status */
270 #define PHY_CONF_ANE 0x0001 /* 1 auto-negotiation enabled */
271 #define PHY_CONF_LOOP 0x0002 /* 1 loopback mode enabled */
272 #define PHY_CONF_SPMASK 0x00f0 /* mask for speed */
273 #define PHY_CONF_10HDX 0x0010 /* 10 Mbit half duplex supported */
274 #define PHY_CONF_10FDX 0x0020 /* 10 Mbit full duplex supported */
275 #define PHY_CONF_100HDX 0x0040 /* 100 Mbit half duplex supported */
276 #define PHY_CONF_100FDX 0x0080 /* 100 Mbit full duplex supported */
278 #define PHY_STAT_LINK 0x0100 /* 1 up - 0 down */
279 #define PHY_STAT_FAULT 0x0200 /* 1 remote fault */
280 #define PHY_STAT_ANC 0x0400 /* 1 auto-negotiation complete */
281 #define PHY_STAT_SPMASK 0xf000 /* mask for speed */
282 #define PHY_STAT_10HDX 0x1000 /* 10 Mbit half duplex selected */
283 #define PHY_STAT_10FDX 0x2000 /* 10 Mbit full duplex selected */
284 #define PHY_STAT_100HDX 0x4000 /* 100 Mbit half duplex selected */
285 #define PHY_STAT_100FDX 0x8000 /* 100 Mbit full duplex selected */
289 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
291 struct fec_enet_private *fep;
292 volatile fec_t *fecp;
294 unsigned short status;
297 fep = netdev_priv(dev);
298 fecp = (volatile fec_t*)dev->base_addr;
301 /* Link is down or autonegotiation is in progress. */
305 spin_lock_irqsave(&fep->hw_lock, flags);
306 /* Fill in a Tx ring entry */
309 status = bdp->cbd_sc;
310 #ifndef final_version
311 if (status & BD_ENET_TX_READY) {
312 /* Ooops. All transmit buffers are full. Bail out.
313 * This should not happen, since dev->tbusy should be set.
315 printk("%s: tx queue full!.\n", dev->name);
316 spin_unlock_irqrestore(&fep->hw_lock, flags);
321 /* Clear all of the status flags.
323 status &= ~BD_ENET_TX_STATS;
325 /* Set buffer length and buffer pointer.
327 bdp->cbd_bufaddr = __pa(skb->data);
328 bdp->cbd_datlen = skb->len;
331 * On some FEC implementations data must be aligned on
332 * 4-byte boundaries. Use bounce buffers to copy data
333 * and get it aligned. Ugh.
335 if (bdp->cbd_bufaddr & FEC_ALIGNMENT) {
337 index = bdp - fep->tx_bd_base;
338 memcpy(fep->tx_bounce[index], (void *)skb->data, skb->len);
339 bdp->cbd_bufaddr = __pa(fep->tx_bounce[index]);
344 fep->tx_skbuff[fep->skb_cur] = skb;
346 dev->stats.tx_bytes += skb->len;
347 fep->skb_cur = (fep->skb_cur+1) & TX_RING_MOD_MASK;
349 /* Push the data cache so the CPM does not get stale memory
352 dma_sync_single(NULL, bdp->cbd_bufaddr,
353 bdp->cbd_datlen, DMA_TO_DEVICE);
355 /* Send it on its way. Tell FEC it's ready, interrupt when done,
356 * it's the last BD of the frame, and to put the CRC on the end.
359 status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
360 | BD_ENET_TX_LAST | BD_ENET_TX_TC);
361 bdp->cbd_sc = status;
363 dev->trans_start = jiffies;
365 /* Trigger transmission start */
366 fecp->fec_x_des_active = 0;
368 /* If this was the last BD in the ring, start at the beginning again.
370 if (status & BD_ENET_TX_WRAP) {
371 bdp = fep->tx_bd_base;
376 if (bdp == fep->dirty_tx) {
378 netif_stop_queue(dev);
381 fep->cur_tx = (cbd_t *)bdp;
383 spin_unlock_irqrestore(&fep->hw_lock, flags);
389 fec_timeout(struct net_device *dev)
391 struct fec_enet_private *fep = netdev_priv(dev);
393 printk("%s: transmit timed out.\n", dev->name);
394 dev->stats.tx_errors++;
395 #ifndef final_version
400 printk("Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n",
401 (unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "",
402 (unsigned long)fep->dirty_tx,
403 (unsigned long)fep->cur_rx);
405 bdp = fep->tx_bd_base;
406 printk(" tx: %u buffers\n", TX_RING_SIZE);
407 for (i = 0 ; i < TX_RING_SIZE; i++) {
408 printk(" %08x: %04x %04x %08x\n",
412 (int) bdp->cbd_bufaddr);
416 bdp = fep->rx_bd_base;
417 printk(" rx: %lu buffers\n", (unsigned long) RX_RING_SIZE);
418 for (i = 0 ; i < RX_RING_SIZE; i++) {
419 printk(" %08x: %04x %04x %08x\n",
423 (int) bdp->cbd_bufaddr);
428 fec_restart(dev, fep->full_duplex);
429 netif_wake_queue(dev);
432 /* The interrupt handler.
433 * This is called from the MPC core interrupt.
436 fec_enet_interrupt(int irq, void * dev_id)
438 struct net_device *dev = dev_id;
439 volatile fec_t *fecp;
441 irqreturn_t ret = IRQ_NONE;
443 fecp = (volatile fec_t*)dev->base_addr;
445 /* Get the interrupt events that caused us to be here.
448 int_events = fecp->fec_ievent;
449 fecp->fec_ievent = int_events;
451 /* Handle receive event in its own function.
453 if (int_events & FEC_ENET_RXF) {
458 /* Transmit OK, or non-fatal error. Update the buffer
459 descriptors. FEC handles all errors, we just discover
460 them as part of the transmit process.
462 if (int_events & FEC_ENET_TXF) {
467 if (int_events & FEC_ENET_MII) {
472 } while (int_events);
479 fec_enet_tx(struct net_device *dev)
481 struct fec_enet_private *fep;
483 unsigned short status;
486 fep = netdev_priv(dev);
487 spin_lock_irq(&fep->hw_lock);
490 while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) {
491 if (bdp == fep->cur_tx && fep->tx_full == 0) break;
493 skb = fep->tx_skbuff[fep->skb_dirty];
494 /* Check for errors. */
495 if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC |
496 BD_ENET_TX_RL | BD_ENET_TX_UN |
498 dev->stats.tx_errors++;
499 if (status & BD_ENET_TX_HB) /* No heartbeat */
500 dev->stats.tx_heartbeat_errors++;
501 if (status & BD_ENET_TX_LC) /* Late collision */
502 dev->stats.tx_window_errors++;
503 if (status & BD_ENET_TX_RL) /* Retrans limit */
504 dev->stats.tx_aborted_errors++;
505 if (status & BD_ENET_TX_UN) /* Underrun */
506 dev->stats.tx_fifo_errors++;
507 if (status & BD_ENET_TX_CSL) /* Carrier lost */
508 dev->stats.tx_carrier_errors++;
510 dev->stats.tx_packets++;
513 #ifndef final_version
514 if (status & BD_ENET_TX_READY)
515 printk("HEY! Enet xmit interrupt and TX_READY.\n");
517 /* Deferred means some collisions occurred during transmit,
518 * but we eventually sent the packet OK.
520 if (status & BD_ENET_TX_DEF)
521 dev->stats.collisions++;
523 /* Free the sk buffer associated with this last transmit.
525 dev_kfree_skb_any(skb);
526 fep->tx_skbuff[fep->skb_dirty] = NULL;
527 fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
529 /* Update pointer to next buffer descriptor to be transmitted.
531 if (status & BD_ENET_TX_WRAP)
532 bdp = fep->tx_bd_base;
536 /* Since we have freed up a buffer, the ring is no longer
541 if (netif_queue_stopped(dev))
542 netif_wake_queue(dev);
545 fep->dirty_tx = (cbd_t *)bdp;
546 spin_unlock_irq(&fep->hw_lock);
550 /* During a receive, the cur_rx points to the current incoming buffer.
551 * When we update through the ring, if the next incoming buffer has
552 * not been given to the system, we just set the empty indicator,
553 * effectively tossing the packet.
556 fec_enet_rx(struct net_device *dev)
558 struct fec_enet_private *fep;
559 volatile fec_t *fecp;
561 unsigned short status;
570 fep = netdev_priv(dev);
571 fecp = (volatile fec_t*)dev->base_addr;
573 spin_lock_irq(&fep->hw_lock);
575 /* First, grab all of the stats for the incoming packet.
576 * These get messed up if we get called due to a busy condition.
580 while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
582 #ifndef final_version
583 /* Since we have allocated space to hold a complete frame,
584 * the last indicator should be set.
586 if ((status & BD_ENET_RX_LAST) == 0)
587 printk("FEC ENET: rcv is not +last\n");
591 goto rx_processing_done;
593 /* Check for errors. */
594 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
595 BD_ENET_RX_CR | BD_ENET_RX_OV)) {
596 dev->stats.rx_errors++;
597 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
598 /* Frame too long or too short. */
599 dev->stats.rx_length_errors++;
601 if (status & BD_ENET_RX_NO) /* Frame alignment */
602 dev->stats.rx_frame_errors++;
603 if (status & BD_ENET_RX_CR) /* CRC Error */
604 dev->stats.rx_crc_errors++;
605 if (status & BD_ENET_RX_OV) /* FIFO overrun */
606 dev->stats.rx_fifo_errors++;
609 /* Report late collisions as a frame error.
610 * On this error, the BD is closed, but we don't know what we
611 * have in the buffer. So, just drop this frame on the floor.
613 if (status & BD_ENET_RX_CL) {
614 dev->stats.rx_errors++;
615 dev->stats.rx_frame_errors++;
616 goto rx_processing_done;
619 /* Process the incoming frame.
621 dev->stats.rx_packets++;
622 pkt_len = bdp->cbd_datlen;
623 dev->stats.rx_bytes += pkt_len;
624 data = (__u8*)__va(bdp->cbd_bufaddr);
626 dma_sync_single(NULL, (unsigned long)__pa(data),
627 pkt_len - 4, DMA_FROM_DEVICE);
629 /* This does 16 byte alignment, exactly what we need.
630 * The packet length includes FCS, but we don't want to
631 * include that when passing upstream as it messes up
632 * bridging applications.
634 skb = dev_alloc_skb(pkt_len-4);
637 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
638 dev->stats.rx_dropped++;
640 skb_put(skb,pkt_len-4); /* Make room */
641 skb_copy_to_linear_data(skb, data, pkt_len-4);
642 skb->protocol=eth_type_trans(skb,dev);
647 /* Clear the status flags for this buffer.
649 status &= ~BD_ENET_RX_STATS;
651 /* Mark the buffer empty.
653 status |= BD_ENET_RX_EMPTY;
654 bdp->cbd_sc = status;
656 /* Update BD pointer to next entry.
658 if (status & BD_ENET_RX_WRAP)
659 bdp = fep->rx_bd_base;
664 /* Doing this here will keep the FEC running while we process
665 * incoming frames. On a heavily loaded network, we should be
666 * able to keep up at the expense of system resources.
668 fecp->fec_r_des_active = 0;
670 } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */
671 fep->cur_rx = (cbd_t *)bdp;
674 /* Doing this here will allow us to process all frames in the
675 * ring before the FEC is allowed to put more there. On a heavily
676 * loaded network, some frames may be lost. Unfortunately, this
677 * increases the interrupt overhead since we can potentially work
678 * our way back to the interrupt return only to come right back
681 fecp->fec_r_des_active = 0;
684 spin_unlock_irq(&fep->hw_lock);
688 /* called from interrupt context */
690 fec_enet_mii(struct net_device *dev)
692 struct fec_enet_private *fep;
697 fep = netdev_priv(dev);
698 spin_lock_irq(&fep->mii_lock);
701 mii_reg = ep->fec_mii_data;
703 if ((mip = mii_head) == NULL) {
704 printk("MII and no head!\n");
708 if (mip->mii_func != NULL)
709 (*(mip->mii_func))(mii_reg, dev);
711 mii_head = mip->mii_next;
712 mip->mii_next = mii_free;
715 if ((mip = mii_head) != NULL)
716 ep->fec_mii_data = mip->mii_regval;
719 spin_unlock_irq(&fep->mii_lock);
723 mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_device *))
725 struct fec_enet_private *fep;
730 /* Add PHY address to register command.
732 fep = netdev_priv(dev);
733 spin_lock_irqsave(&fep->mii_lock, flags);
735 regval |= fep->phy_addr << 23;
738 if ((mip = mii_free) != NULL) {
739 mii_free = mip->mii_next;
740 mip->mii_regval = regval;
741 mip->mii_func = func;
742 mip->mii_next = NULL;
744 mii_tail->mii_next = mip;
747 mii_head = mii_tail = mip;
748 fep->hwp->fec_mii_data = regval;
754 spin_unlock_irqrestore(&fep->mii_lock, flags);
758 static void mii_do_cmd(struct net_device *dev, const phy_cmd_t *c)
763 for (; c->mii_data != mk_mii_end; c++)
764 mii_queue(dev, c->mii_data, c->funct);
767 static void mii_parse_sr(uint mii_reg, struct net_device *dev)
769 struct fec_enet_private *fep = netdev_priv(dev);
770 volatile uint *s = &(fep->phy_status);
773 status = *s & ~(PHY_STAT_LINK | PHY_STAT_FAULT | PHY_STAT_ANC);
775 if (mii_reg & 0x0004)
776 status |= PHY_STAT_LINK;
777 if (mii_reg & 0x0010)
778 status |= PHY_STAT_FAULT;
779 if (mii_reg & 0x0020)
780 status |= PHY_STAT_ANC;
784 static void mii_parse_cr(uint mii_reg, struct net_device *dev)
786 struct fec_enet_private *fep = netdev_priv(dev);
787 volatile uint *s = &(fep->phy_status);
790 status = *s & ~(PHY_CONF_ANE | PHY_CONF_LOOP);
792 if (mii_reg & 0x1000)
793 status |= PHY_CONF_ANE;
794 if (mii_reg & 0x4000)
795 status |= PHY_CONF_LOOP;
799 static void mii_parse_anar(uint mii_reg, struct net_device *dev)
801 struct fec_enet_private *fep = netdev_priv(dev);
802 volatile uint *s = &(fep->phy_status);
805 status = *s & ~(PHY_CONF_SPMASK);
807 if (mii_reg & 0x0020)
808 status |= PHY_CONF_10HDX;
809 if (mii_reg & 0x0040)
810 status |= PHY_CONF_10FDX;
811 if (mii_reg & 0x0080)
812 status |= PHY_CONF_100HDX;
813 if (mii_reg & 0x00100)
814 status |= PHY_CONF_100FDX;
818 /* ------------------------------------------------------------------------- */
819 /* The Level one LXT970 is used by many boards */
821 #define MII_LXT970_MIRROR 16 /* Mirror register */
822 #define MII_LXT970_IER 17 /* Interrupt Enable Register */
823 #define MII_LXT970_ISR 18 /* Interrupt Status Register */
824 #define MII_LXT970_CONFIG 19 /* Configuration Register */
825 #define MII_LXT970_CSR 20 /* Chip Status Register */
827 static void mii_parse_lxt970_csr(uint mii_reg, struct net_device *dev)
829 struct fec_enet_private *fep = netdev_priv(dev);
830 volatile uint *s = &(fep->phy_status);
833 status = *s & ~(PHY_STAT_SPMASK);
834 if (mii_reg & 0x0800) {
835 if (mii_reg & 0x1000)
836 status |= PHY_STAT_100FDX;
838 status |= PHY_STAT_100HDX;
840 if (mii_reg & 0x1000)
841 status |= PHY_STAT_10FDX;
843 status |= PHY_STAT_10HDX;
848 static phy_cmd_t const phy_cmd_lxt970_config[] = {
849 { mk_mii_read(MII_REG_CR), mii_parse_cr },
850 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
853 static phy_cmd_t const phy_cmd_lxt970_startup[] = { /* enable interrupts */
854 { mk_mii_write(MII_LXT970_IER, 0x0002), NULL },
855 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
858 static phy_cmd_t const phy_cmd_lxt970_ack_int[] = {
859 /* read SR and ISR to acknowledge */
860 { mk_mii_read(MII_REG_SR), mii_parse_sr },
861 { mk_mii_read(MII_LXT970_ISR), NULL },
863 /* find out the current status */
864 { mk_mii_read(MII_LXT970_CSR), mii_parse_lxt970_csr },
867 static phy_cmd_t const phy_cmd_lxt970_shutdown[] = { /* disable interrupts */
868 { mk_mii_write(MII_LXT970_IER, 0x0000), NULL },
871 static phy_info_t const phy_info_lxt970 = {
874 .config = phy_cmd_lxt970_config,
875 .startup = phy_cmd_lxt970_startup,
876 .ack_int = phy_cmd_lxt970_ack_int,
877 .shutdown = phy_cmd_lxt970_shutdown
880 /* ------------------------------------------------------------------------- */
881 /* The Level one LXT971 is used on some of my custom boards */
883 /* register definitions for the 971 */
885 #define MII_LXT971_PCR 16 /* Port Control Register */
886 #define MII_LXT971_SR2 17 /* Status Register 2 */
887 #define MII_LXT971_IER 18 /* Interrupt Enable Register */
888 #define MII_LXT971_ISR 19 /* Interrupt Status Register */
889 #define MII_LXT971_LCR 20 /* LED Control Register */
890 #define MII_LXT971_TCR 30 /* Transmit Control Register */
893 * I had some nice ideas of running the MDIO faster...
894 * The 971 should support 8MHz and I tried it, but things acted really
895 * weird, so 2.5 MHz ought to be enough for anyone...
898 static void mii_parse_lxt971_sr2(uint mii_reg, struct net_device *dev)
900 struct fec_enet_private *fep = netdev_priv(dev);
901 volatile uint *s = &(fep->phy_status);
904 status = *s & ~(PHY_STAT_SPMASK | PHY_STAT_LINK | PHY_STAT_ANC);
906 if (mii_reg & 0x0400) {
908 status |= PHY_STAT_LINK;
912 if (mii_reg & 0x0080)
913 status |= PHY_STAT_ANC;
914 if (mii_reg & 0x4000) {
915 if (mii_reg & 0x0200)
916 status |= PHY_STAT_100FDX;
918 status |= PHY_STAT_100HDX;
920 if (mii_reg & 0x0200)
921 status |= PHY_STAT_10FDX;
923 status |= PHY_STAT_10HDX;
925 if (mii_reg & 0x0008)
926 status |= PHY_STAT_FAULT;
931 static phy_cmd_t const phy_cmd_lxt971_config[] = {
932 /* limit to 10MBit because my prototype board
933 * doesn't work with 100. */
934 { mk_mii_read(MII_REG_CR), mii_parse_cr },
935 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
936 { mk_mii_read(MII_LXT971_SR2), mii_parse_lxt971_sr2 },
939 static phy_cmd_t const phy_cmd_lxt971_startup[] = { /* enable interrupts */
940 { mk_mii_write(MII_LXT971_IER, 0x00f2), NULL },
941 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
942 { mk_mii_write(MII_LXT971_LCR, 0xd422), NULL }, /* LED config */
943 /* Somehow does the 971 tell me that the link is down
944 * the first read after power-up.
945 * read here to get a valid value in ack_int */
946 { mk_mii_read(MII_REG_SR), mii_parse_sr },
949 static phy_cmd_t const phy_cmd_lxt971_ack_int[] = {
950 /* acknowledge the int before reading status ! */
951 { mk_mii_read(MII_LXT971_ISR), NULL },
952 /* find out the current status */
953 { mk_mii_read(MII_REG_SR), mii_parse_sr },
954 { mk_mii_read(MII_LXT971_SR2), mii_parse_lxt971_sr2 },
957 static phy_cmd_t const phy_cmd_lxt971_shutdown[] = { /* disable interrupts */
958 { mk_mii_write(MII_LXT971_IER, 0x0000), NULL },
961 static phy_info_t const phy_info_lxt971 = {
964 .config = phy_cmd_lxt971_config,
965 .startup = phy_cmd_lxt971_startup,
966 .ack_int = phy_cmd_lxt971_ack_int,
967 .shutdown = phy_cmd_lxt971_shutdown
970 /* ------------------------------------------------------------------------- */
971 /* The Quality Semiconductor QS6612 is used on the RPX CLLF */
973 /* register definitions */
975 #define MII_QS6612_MCR 17 /* Mode Control Register */
976 #define MII_QS6612_FTR 27 /* Factory Test Register */
977 #define MII_QS6612_MCO 28 /* Misc. Control Register */
978 #define MII_QS6612_ISR 29 /* Interrupt Source Register */
979 #define MII_QS6612_IMR 30 /* Interrupt Mask Register */
980 #define MII_QS6612_PCR 31 /* 100BaseTx PHY Control Reg. */
982 static void mii_parse_qs6612_pcr(uint mii_reg, struct net_device *dev)
984 struct fec_enet_private *fep = netdev_priv(dev);
985 volatile uint *s = &(fep->phy_status);
988 status = *s & ~(PHY_STAT_SPMASK);
990 switch((mii_reg >> 2) & 7) {
991 case 1: status |= PHY_STAT_10HDX; break;
992 case 2: status |= PHY_STAT_100HDX; break;
993 case 5: status |= PHY_STAT_10FDX; break;
994 case 6: status |= PHY_STAT_100FDX; break;
1000 static phy_cmd_t const phy_cmd_qs6612_config[] = {
1001 /* The PHY powers up isolated on the RPX,
1002 * so send a command to allow operation.
1004 { mk_mii_write(MII_QS6612_PCR, 0x0dc0), NULL },
1006 /* parse cr and anar to get some info */
1007 { mk_mii_read(MII_REG_CR), mii_parse_cr },
1008 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
1011 static phy_cmd_t const phy_cmd_qs6612_startup[] = { /* enable interrupts */
1012 { mk_mii_write(MII_QS6612_IMR, 0x003a), NULL },
1013 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
1016 static phy_cmd_t const phy_cmd_qs6612_ack_int[] = {
1017 /* we need to read ISR, SR and ANER to acknowledge */
1018 { mk_mii_read(MII_QS6612_ISR), NULL },
1019 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1020 { mk_mii_read(MII_REG_ANER), NULL },
1022 /* read pcr to get info */
1023 { mk_mii_read(MII_QS6612_PCR), mii_parse_qs6612_pcr },
1026 static phy_cmd_t const phy_cmd_qs6612_shutdown[] = { /* disable interrupts */
1027 { mk_mii_write(MII_QS6612_IMR, 0x0000), NULL },
1030 static phy_info_t const phy_info_qs6612 = {
1033 .config = phy_cmd_qs6612_config,
1034 .startup = phy_cmd_qs6612_startup,
1035 .ack_int = phy_cmd_qs6612_ack_int,
1036 .shutdown = phy_cmd_qs6612_shutdown
1039 /* ------------------------------------------------------------------------- */
1040 /* AMD AM79C874 phy */
1042 /* register definitions for the 874 */
1044 #define MII_AM79C874_MFR 16 /* Miscellaneous Feature Register */
1045 #define MII_AM79C874_ICSR 17 /* Interrupt/Status Register */
1046 #define MII_AM79C874_DR 18 /* Diagnostic Register */
1047 #define MII_AM79C874_PMLR 19 /* Power and Loopback Register */
1048 #define MII_AM79C874_MCR 21 /* ModeControl Register */
1049 #define MII_AM79C874_DC 23 /* Disconnect Counter */
1050 #define MII_AM79C874_REC 24 /* Recieve Error Counter */
1052 static void mii_parse_am79c874_dr(uint mii_reg, struct net_device *dev)
1054 struct fec_enet_private *fep = netdev_priv(dev);
1055 volatile uint *s = &(fep->phy_status);
1058 status = *s & ~(PHY_STAT_SPMASK | PHY_STAT_ANC);
1060 if (mii_reg & 0x0080)
1061 status |= PHY_STAT_ANC;
1062 if (mii_reg & 0x0400)
1063 status |= ((mii_reg & 0x0800) ? PHY_STAT_100FDX : PHY_STAT_100HDX);
1065 status |= ((mii_reg & 0x0800) ? PHY_STAT_10FDX : PHY_STAT_10HDX);
1070 static phy_cmd_t const phy_cmd_am79c874_config[] = {
1071 { mk_mii_read(MII_REG_CR), mii_parse_cr },
1072 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
1073 { mk_mii_read(MII_AM79C874_DR), mii_parse_am79c874_dr },
1076 static phy_cmd_t const phy_cmd_am79c874_startup[] = { /* enable interrupts */
1077 { mk_mii_write(MII_AM79C874_ICSR, 0xff00), NULL },
1078 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
1079 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1082 static phy_cmd_t const phy_cmd_am79c874_ack_int[] = {
1083 /* find out the current status */
1084 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1085 { mk_mii_read(MII_AM79C874_DR), mii_parse_am79c874_dr },
1086 /* we only need to read ISR to acknowledge */
1087 { mk_mii_read(MII_AM79C874_ICSR), NULL },
1090 static phy_cmd_t const phy_cmd_am79c874_shutdown[] = { /* disable interrupts */
1091 { mk_mii_write(MII_AM79C874_ICSR, 0x0000), NULL },
1094 static phy_info_t const phy_info_am79c874 = {
1097 .config = phy_cmd_am79c874_config,
1098 .startup = phy_cmd_am79c874_startup,
1099 .ack_int = phy_cmd_am79c874_ack_int,
1100 .shutdown = phy_cmd_am79c874_shutdown
1104 /* ------------------------------------------------------------------------- */
1105 /* Kendin KS8721BL phy */
1107 /* register definitions for the 8721 */
1109 #define MII_KS8721BL_RXERCR 21
1110 #define MII_KS8721BL_ICSR 27
1111 #define MII_KS8721BL_PHYCR 31
1113 static phy_cmd_t const phy_cmd_ks8721bl_config[] = {
1114 { mk_mii_read(MII_REG_CR), mii_parse_cr },
1115 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
1118 static phy_cmd_t const phy_cmd_ks8721bl_startup[] = { /* enable interrupts */
1119 { mk_mii_write(MII_KS8721BL_ICSR, 0xff00), NULL },
1120 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
1121 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1124 static phy_cmd_t const phy_cmd_ks8721bl_ack_int[] = {
1125 /* find out the current status */
1126 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1127 /* we only need to read ISR to acknowledge */
1128 { mk_mii_read(MII_KS8721BL_ICSR), NULL },
1131 static phy_cmd_t const phy_cmd_ks8721bl_shutdown[] = { /* disable interrupts */
1132 { mk_mii_write(MII_KS8721BL_ICSR, 0x0000), NULL },
1135 static phy_info_t const phy_info_ks8721bl = {
1138 .config = phy_cmd_ks8721bl_config,
1139 .startup = phy_cmd_ks8721bl_startup,
1140 .ack_int = phy_cmd_ks8721bl_ack_int,
1141 .shutdown = phy_cmd_ks8721bl_shutdown
1144 /* ------------------------------------------------------------------------- */
1145 /* register definitions for the DP83848 */
1147 #define MII_DP8384X_PHYSTST 16 /* PHY Status Register */
1149 static void mii_parse_dp8384x_sr2(uint mii_reg, struct net_device *dev)
1151 struct fec_enet_private *fep = netdev_priv(dev);
1152 volatile uint *s = &(fep->phy_status);
1154 *s &= ~(PHY_STAT_SPMASK | PHY_STAT_LINK | PHY_STAT_ANC);
1157 if (mii_reg & 0x0001) {
1159 *s |= PHY_STAT_LINK;
1162 /* Status of link */
1163 if (mii_reg & 0x0010) /* Autonegotioation complete */
1165 if (mii_reg & 0x0002) { /* 10MBps? */
1166 if (mii_reg & 0x0004) /* Full Duplex? */
1167 *s |= PHY_STAT_10FDX;
1169 *s |= PHY_STAT_10HDX;
1170 } else { /* 100 Mbps? */
1171 if (mii_reg & 0x0004) /* Full Duplex? */
1172 *s |= PHY_STAT_100FDX;
1174 *s |= PHY_STAT_100HDX;
1176 if (mii_reg & 0x0008)
1177 *s |= PHY_STAT_FAULT;
1180 static phy_info_t phy_info_dp83848= {
1184 (const phy_cmd_t []) { /* config */
1185 { mk_mii_read(MII_REG_CR), mii_parse_cr },
1186 { mk_mii_read(MII_REG_ANAR), mii_parse_anar },
1187 { mk_mii_read(MII_DP8384X_PHYSTST), mii_parse_dp8384x_sr2 },
1190 (const phy_cmd_t []) { /* startup - enable interrupts */
1191 { mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
1192 { mk_mii_read(MII_REG_SR), mii_parse_sr },
1195 (const phy_cmd_t []) { /* ack_int - never happens, no interrupt */
1198 (const phy_cmd_t []) { /* shutdown */
1203 /* ------------------------------------------------------------------------- */
1205 static phy_info_t const * const phy_info[] = {
1215 /* ------------------------------------------------------------------------- */
1216 #ifdef HAVE_mii_link_interrupt
1218 mii_link_interrupt(int irq, void * dev_id);
1221 * This is specific to the MII interrupt setup of the M5272EVB.
1223 static void __inline__ fec_request_mii_intr(struct net_device *dev)
1225 if (request_irq(66, mii_link_interrupt, IRQF_DISABLED, "fec(MII)", dev) != 0)
1226 printk("FEC: Could not allocate fec(MII) IRQ(66)!\n");
1229 static void __inline__ fec_disable_phy_intr(void)
1231 volatile unsigned long *icrp;
1232 icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR1);
1236 static void __inline__ fec_phy_ack_intr(void)
1238 volatile unsigned long *icrp;
1239 /* Acknowledge the interrupt */
1240 icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR1);
1246 static void __inline__ fec_get_mac(struct net_device *dev)
1248 struct fec_enet_private *fep = netdev_priv(dev);
1249 volatile fec_t *fecp;
1250 unsigned char *iap, tmpaddr[ETH_ALEN];
1256 * Get MAC address from FLASH.
1257 * If it is all 1's or 0's, use the default.
1259 iap = (unsigned char *)FEC_FLASHMAC;
1260 if ((iap[0] == 0) && (iap[1] == 0) && (iap[2] == 0) &&
1261 (iap[3] == 0) && (iap[4] == 0) && (iap[5] == 0))
1262 iap = fec_mac_default;
1263 if ((iap[0] == 0xff) && (iap[1] == 0xff) && (iap[2] == 0xff) &&
1264 (iap[3] == 0xff) && (iap[4] == 0xff) && (iap[5] == 0xff))
1265 iap = fec_mac_default;
1267 *((unsigned long *) &tmpaddr[0]) = fecp->fec_addr_low;
1268 *((unsigned short *) &tmpaddr[4]) = (fecp->fec_addr_high >> 16);
1272 memcpy(dev->dev_addr, iap, ETH_ALEN);
1274 /* Adjust MAC if using default MAC address */
1275 if (iap == fec_mac_default)
1276 dev->dev_addr[ETH_ALEN-1] = fec_mac_default[ETH_ALEN-1] + fep->index;
1280 /* ------------------------------------------------------------------------- */
1282 static void mii_display_status(struct net_device *dev)
1284 struct fec_enet_private *fep = netdev_priv(dev);
1285 volatile uint *s = &(fep->phy_status);
1287 if (!fep->link && !fep->old_link) {
1288 /* Link is still down - don't print anything */
1292 printk("%s: status: ", dev->name);
1295 printk("link down");
1299 switch(*s & PHY_STAT_SPMASK) {
1300 case PHY_STAT_100FDX: printk(", 100MBit Full Duplex"); break;
1301 case PHY_STAT_100HDX: printk(", 100MBit Half Duplex"); break;
1302 case PHY_STAT_10FDX: printk(", 10MBit Full Duplex"); break;
1303 case PHY_STAT_10HDX: printk(", 10MBit Half Duplex"); break;
1305 printk(", Unknown speed/duplex");
1308 if (*s & PHY_STAT_ANC)
1309 printk(", auto-negotiation complete");
1312 if (*s & PHY_STAT_FAULT)
1313 printk(", remote fault");
1318 static void mii_display_config(struct work_struct *work)
1320 struct fec_enet_private *fep = container_of(work, struct fec_enet_private, phy_task);
1321 struct net_device *dev = fep->netdev;
1322 uint status = fep->phy_status;
1325 ** When we get here, phy_task is already removed from
1326 ** the workqueue. It is thus safe to allow to reuse it.
1328 fep->mii_phy_task_queued = 0;
1329 printk("%s: config: auto-negotiation ", dev->name);
1331 if (status & PHY_CONF_ANE)
1336 if (status & PHY_CONF_100FDX)
1338 if (status & PHY_CONF_100HDX)
1340 if (status & PHY_CONF_10FDX)
1342 if (status & PHY_CONF_10HDX)
1344 if (!(status & PHY_CONF_SPMASK))
1345 printk(", No speed/duplex selected?");
1347 if (status & PHY_CONF_LOOP)
1348 printk(", loopback enabled");
1352 fep->sequence_done = 1;
1355 static void mii_relink(struct work_struct *work)
1357 struct fec_enet_private *fep = container_of(work, struct fec_enet_private, phy_task);
1358 struct net_device *dev = fep->netdev;
1362 ** When we get here, phy_task is already removed from
1363 ** the workqueue. It is thus safe to allow to reuse it.
1365 fep->mii_phy_task_queued = 0;
1366 fep->link = (fep->phy_status & PHY_STAT_LINK) ? 1 : 0;
1367 mii_display_status(dev);
1368 fep->old_link = fep->link;
1373 & (PHY_STAT_100FDX | PHY_STAT_10FDX))
1375 fec_restart(dev, duplex);
1380 enable_irq(fep->mii_irq);
1385 /* mii_queue_relink is called in interrupt context from mii_link_interrupt */
1386 static void mii_queue_relink(uint mii_reg, struct net_device *dev)
1388 struct fec_enet_private *fep = netdev_priv(dev);
1391 ** We cannot queue phy_task twice in the workqueue. It
1392 ** would cause an endless loop in the workqueue.
1393 ** Fortunately, if the last mii_relink entry has not yet been
1394 ** executed now, it will do the job for the current interrupt,
1395 ** which is just what we want.
1397 if (fep->mii_phy_task_queued)
1400 fep->mii_phy_task_queued = 1;
1401 INIT_WORK(&fep->phy_task, mii_relink);
1402 schedule_work(&fep->phy_task);
1405 /* mii_queue_config is called in interrupt context from fec_enet_mii */
1406 static void mii_queue_config(uint mii_reg, struct net_device *dev)
1408 struct fec_enet_private *fep = netdev_priv(dev);
1410 if (fep->mii_phy_task_queued)
1413 fep->mii_phy_task_queued = 1;
1414 INIT_WORK(&fep->phy_task, mii_display_config);
1415 schedule_work(&fep->phy_task);
1418 phy_cmd_t const phy_cmd_relink[] = {
1419 { mk_mii_read(MII_REG_CR), mii_queue_relink },
1422 phy_cmd_t const phy_cmd_config[] = {
1423 { mk_mii_read(MII_REG_CR), mii_queue_config },
1427 /* Read remainder of PHY ID.
1430 mii_discover_phy3(uint mii_reg, struct net_device *dev)
1432 struct fec_enet_private *fep;
1435 fep = netdev_priv(dev);
1436 fep->phy_id |= (mii_reg & 0xffff);
1437 printk("fec: PHY @ 0x%x, ID 0x%08x", fep->phy_addr, fep->phy_id);
1439 for(i = 0; phy_info[i]; i++) {
1440 if(phy_info[i]->id == (fep->phy_id >> 4))
1445 printk(" -- %s\n", phy_info[i]->name);
1447 printk(" -- unknown PHY!\n");
1449 fep->phy = phy_info[i];
1450 fep->phy_id_done = 1;
1453 /* Scan all of the MII PHY addresses looking for someone to respond
1454 * with a valid ID. This usually happens quickly.
1457 mii_discover_phy(uint mii_reg, struct net_device *dev)
1459 struct fec_enet_private *fep;
1460 volatile fec_t *fecp;
1463 fep = netdev_priv(dev);
1466 if (fep->phy_addr < 32) {
1467 if ((phytype = (mii_reg & 0xffff)) != 0xffff && phytype != 0) {
1469 /* Got first part of ID, now get remainder.
1471 fep->phy_id = phytype << 16;
1472 mii_queue(dev, mk_mii_read(MII_REG_PHYIR2),
1476 mii_queue(dev, mk_mii_read(MII_REG_PHYIR1),
1480 printk("FEC: No PHY device found.\n");
1481 /* Disable external MII interface */
1482 fecp->fec_mii_speed = fep->phy_speed = 0;
1483 #ifdef HAVE_mii_link_interrupt
1484 fec_disable_phy_intr();
1489 /* This interrupt occurs when the PHY detects a link change.
1491 #ifdef HAVE_mii_link_interrupt
1493 mii_link_interrupt(int irq, void * dev_id)
1495 struct net_device *dev = dev_id;
1496 struct fec_enet_private *fep = netdev_priv(dev);
1501 disable_irq(fep->mii_irq); /* disable now, enable later */
1504 mii_do_cmd(dev, fep->phy->ack_int);
1505 mii_do_cmd(dev, phy_cmd_relink); /* restart and display status */
1512 fec_enet_open(struct net_device *dev)
1514 struct fec_enet_private *fep = netdev_priv(dev);
1516 /* I should reset the ring buffers here, but I don't yet know
1517 * a simple way to do that.
1519 fec_set_mac_address(dev);
1521 fep->sequence_done = 0;
1525 mii_do_cmd(dev, fep->phy->ack_int);
1526 mii_do_cmd(dev, fep->phy->config);
1527 mii_do_cmd(dev, phy_cmd_config); /* display configuration */
1529 /* Poll until the PHY tells us its configuration
1531 * Request is initiated by mii_do_cmd above, but answer
1532 * comes by interrupt.
1533 * This should take about 25 usec per register at 2.5 MHz,
1534 * and we read approximately 5 registers.
1536 while(!fep->sequence_done)
1539 mii_do_cmd(dev, fep->phy->startup);
1541 /* Set the initial link state to true. A lot of hardware
1542 * based on this device does not implement a PHY interrupt,
1543 * so we are never notified of link change.
1547 fep->link = 1; /* lets just try it and see */
1548 /* no phy, go full duplex, it's most likely a hub chip */
1549 fec_restart(dev, 1);
1552 netif_start_queue(dev);
1554 return 0; /* Success */
1558 fec_enet_close(struct net_device *dev)
1560 struct fec_enet_private *fep = netdev_priv(dev);
1562 /* Don't know what to do yet.
1565 netif_stop_queue(dev);
1571 /* Set or clear the multicast filter for this adaptor.
1572 * Skeleton taken from sunlance driver.
1573 * The CPM Ethernet implementation allows Multicast as well as individual
1574 * MAC address filtering. Some of the drivers check to make sure it is
1575 * a group multicast address, and discard those that are not. I guess I
1576 * will do the same for now, but just remove the test if you want
1577 * individual filtering as well (do the upper net layers want or support
1578 * this kind of feature?).
1581 #define HASH_BITS 6 /* #bits in hash */
1582 #define CRC32_POLY 0xEDB88320
1584 static void set_multicast_list(struct net_device *dev)
1586 struct fec_enet_private *fep;
1588 struct dev_mc_list *dmi;
1589 unsigned int i, j, bit, data, crc;
1592 fep = netdev_priv(dev);
1595 if (dev->flags&IFF_PROMISC) {
1596 ep->fec_r_cntrl |= 0x0008;
1599 ep->fec_r_cntrl &= ~0x0008;
1601 if (dev->flags & IFF_ALLMULTI) {
1602 /* Catch all multicast addresses, so set the
1603 * filter to all 1's.
1605 ep->fec_grp_hash_table_high = 0xffffffff;
1606 ep->fec_grp_hash_table_low = 0xffffffff;
1608 /* Clear filter and add the addresses in hash register.
1610 ep->fec_grp_hash_table_high = 0;
1611 ep->fec_grp_hash_table_low = 0;
1615 for (j = 0; j < dev->mc_count; j++, dmi = dmi->next)
1617 /* Only support group multicast for now.
1619 if (!(dmi->dmi_addr[0] & 1))
1622 /* calculate crc32 value of mac address
1626 for (i = 0; i < dmi->dmi_addrlen; i++)
1628 data = dmi->dmi_addr[i];
1629 for (bit = 0; bit < 8; bit++, data >>= 1)
1632 (((crc ^ data) & 1) ? CRC32_POLY : 0);
1636 /* only upper 6 bits (HASH_BITS) are used
1637 which point to specific bit in he hash registers
1639 hash = (crc >> (32 - HASH_BITS)) & 0x3f;
1642 ep->fec_grp_hash_table_high |= 1 << (hash - 32);
1644 ep->fec_grp_hash_table_low |= 1 << hash;
1650 /* Set a MAC change in hardware.
1653 fec_set_mac_address(struct net_device *dev)
1655 volatile fec_t *fecp;
1657 fecp = ((struct fec_enet_private *)netdev_priv(dev))->hwp;
1659 /* Set station address. */
1660 fecp->fec_addr_low = dev->dev_addr[3] | (dev->dev_addr[2] << 8) |
1661 (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24);
1662 fecp->fec_addr_high = (dev->dev_addr[5] << 16) |
1663 (dev->dev_addr[4] << 24);
1668 * XXX: We need to clean up on failure exits here.
1670 * index is only used in legacy code
1672 int __init fec_enet_init(struct net_device *dev, int index)
1674 struct fec_enet_private *fep = netdev_priv(dev);
1675 unsigned long mem_addr;
1676 volatile cbd_t *bdp;
1678 volatile fec_t *fecp;
1681 /* Allocate memory for buffer descriptors.
1683 mem_addr = (unsigned long)dma_alloc_coherent(NULL, PAGE_SIZE,
1684 &fep->bd_dma, GFP_KERNEL);
1685 if (mem_addr == 0) {
1686 printk("FEC: allocate descriptor memory failed?\n");
1690 spin_lock_init(&fep->hw_lock);
1691 spin_lock_init(&fep->mii_lock);
1693 /* Create an Ethernet device instance.
1695 fecp = (volatile fec_t *)dev->base_addr;
1701 /* Whack a reset. We should wait for this.
1703 fecp->fec_ecntrl = 1;
1706 /* Set the Ethernet address */
1712 l = fecp->fec_addr_low;
1713 dev->dev_addr[0] = (unsigned char)((l & 0xFF000000) >> 24);
1714 dev->dev_addr[1] = (unsigned char)((l & 0x00FF0000) >> 16);
1715 dev->dev_addr[2] = (unsigned char)((l & 0x0000FF00) >> 8);
1716 dev->dev_addr[3] = (unsigned char)((l & 0x000000FF) >> 0);
1717 l = fecp->fec_addr_high;
1718 dev->dev_addr[4] = (unsigned char)((l & 0xFF000000) >> 24);
1719 dev->dev_addr[5] = (unsigned char)((l & 0x00FF0000) >> 16);
1723 cbd_base = (cbd_t *)mem_addr;
1725 /* Set receive and transmit descriptor base.
1727 fep->rx_bd_base = cbd_base;
1728 fep->tx_bd_base = cbd_base + RX_RING_SIZE;
1730 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
1731 fep->cur_rx = fep->rx_bd_base;
1733 fep->skb_cur = fep->skb_dirty = 0;
1735 /* Initialize the receive buffer descriptors.
1737 bdp = fep->rx_bd_base;
1738 for (i=0; i<FEC_ENET_RX_PAGES; i++) {
1742 mem_addr = __get_free_page(GFP_KERNEL);
1743 /* XXX: missing check for allocation failure */
1745 /* Initialize the BD for every fragment in the page.
1747 for (j=0; j<FEC_ENET_RX_FRPPG; j++) {
1748 bdp->cbd_sc = BD_ENET_RX_EMPTY;
1749 bdp->cbd_bufaddr = __pa(mem_addr);
1750 mem_addr += FEC_ENET_RX_FRSIZE;
1755 /* Set the last buffer to wrap.
1758 bdp->cbd_sc |= BD_SC_WRAP;
1760 /* ...and the same for transmmit.
1762 bdp = fep->tx_bd_base;
1763 for (i=0, j=FEC_ENET_TX_FRPPG; i<TX_RING_SIZE; i++) {
1764 if (j >= FEC_ENET_TX_FRPPG) {
1765 mem_addr = __get_free_page(GFP_KERNEL);
1768 mem_addr += FEC_ENET_TX_FRSIZE;
1771 fep->tx_bounce[i] = (unsigned char *) mem_addr;
1773 /* Initialize the BD for every fragment in the page.
1776 bdp->cbd_bufaddr = 0;
1780 /* Set the last buffer to wrap.
1783 bdp->cbd_sc |= BD_SC_WRAP;
1785 /* Set receive and transmit descriptor base.
1787 fecp->fec_r_des_start = fep->bd_dma;
1788 fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
1791 #ifdef HAVE_mii_link_interrupt
1792 fec_request_mii_intr(dev);
1795 fecp->fec_grp_hash_table_high = 0;
1796 fecp->fec_grp_hash_table_low = 0;
1797 fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
1798 fecp->fec_ecntrl = 2;
1799 fecp->fec_r_des_active = 0;
1800 #ifndef CONFIG_M5272
1801 fecp->fec_hash_table_high = 0;
1802 fecp->fec_hash_table_low = 0;
1805 /* The FEC Ethernet specific entries in the device structure. */
1806 dev->open = fec_enet_open;
1807 dev->hard_start_xmit = fec_enet_start_xmit;
1808 dev->tx_timeout = fec_timeout;
1809 dev->watchdog_timeo = TX_TIMEOUT;
1810 dev->stop = fec_enet_close;
1811 dev->set_multicast_list = set_multicast_list;
1813 for (i=0; i<NMII-1; i++)
1814 mii_cmds[i].mii_next = &mii_cmds[i+1];
1815 mii_free = mii_cmds;
1817 /* setup MII interface */
1818 fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;
1819 fecp->fec_x_cntrl = 0x00;
1822 * Set MII speed to 2.5 MHz
1824 fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
1825 / 2500000) / 2) & 0x3F) << 1;
1826 fecp->fec_mii_speed = fep->phy_speed;
1827 fec_restart(dev, 0);
1829 /* Clear and enable interrupts */
1830 fecp->fec_ievent = 0xffc00000;
1831 fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII);
1833 /* Queue up command to detect the PHY and initialize the
1834 * remainder of the interface.
1836 fep->phy_id_done = 0;
1838 mii_queue(dev, mk_mii_read(MII_REG_PHYIR1), mii_discover_phy);
1843 /* This function is called to start or restart the FEC during a link
1844 * change. This only happens when switching between half and full
1848 fec_restart(struct net_device *dev, int duplex)
1850 struct fec_enet_private *fep;
1851 volatile cbd_t *bdp;
1852 volatile fec_t *fecp;
1855 fep = netdev_priv(dev);
1858 /* Whack a reset. We should wait for this.
1860 fecp->fec_ecntrl = 1;
1863 /* Clear any outstanding interrupt.
1865 fecp->fec_ievent = 0xffc00000;
1867 /* Set station address.
1869 fec_set_mac_address(dev);
1871 /* Reset all multicast.
1873 fecp->fec_grp_hash_table_high = 0;
1874 fecp->fec_grp_hash_table_low = 0;
1876 /* Set maximum receive buffer size.
1878 fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
1880 /* Set receive and transmit descriptor base.
1882 fecp->fec_r_des_start = fep->bd_dma;
1883 fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
1886 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
1887 fep->cur_rx = fep->rx_bd_base;
1889 /* Reset SKB transmit buffers.
1891 fep->skb_cur = fep->skb_dirty = 0;
1892 for (i=0; i<=TX_RING_MOD_MASK; i++) {
1893 if (fep->tx_skbuff[i] != NULL) {
1894 dev_kfree_skb_any(fep->tx_skbuff[i]);
1895 fep->tx_skbuff[i] = NULL;
1899 /* Initialize the receive buffer descriptors.
1901 bdp = fep->rx_bd_base;
1902 for (i=0; i<RX_RING_SIZE; i++) {
1904 /* Initialize the BD for every fragment in the page.
1906 bdp->cbd_sc = BD_ENET_RX_EMPTY;
1910 /* Set the last buffer to wrap.
1913 bdp->cbd_sc |= BD_SC_WRAP;
1915 /* ...and the same for transmmit.
1917 bdp = fep->tx_bd_base;
1918 for (i=0; i<TX_RING_SIZE; i++) {
1920 /* Initialize the BD for every fragment in the page.
1923 bdp->cbd_bufaddr = 0;
1927 /* Set the last buffer to wrap.
1930 bdp->cbd_sc |= BD_SC_WRAP;
1935 fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;/* MII enable */
1936 fecp->fec_x_cntrl = 0x04; /* FD enable */
1938 /* MII enable|No Rcv on Xmit */
1939 fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x06;
1940 fecp->fec_x_cntrl = 0x00;
1942 fep->full_duplex = duplex;
1946 fecp->fec_mii_speed = fep->phy_speed;
1948 /* And last, enable the transmit and receive processing.
1950 fecp->fec_ecntrl = 2;
1951 fecp->fec_r_des_active = 0;
1953 /* Enable interrupts we wish to service.
1955 fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII);
1959 fec_stop(struct net_device *dev)
1961 volatile fec_t *fecp;
1962 struct fec_enet_private *fep;
1964 fep = netdev_priv(dev);
1968 ** We cannot expect a graceful transmit stop without link !!!
1972 fecp->fec_x_cntrl = 0x01; /* Graceful transmit stop */
1974 if (!(fecp->fec_ievent & FEC_ENET_GRA))
1975 printk("fec_stop : Graceful transmit stop did not complete !\n");
1978 /* Whack a reset. We should wait for this.
1980 fecp->fec_ecntrl = 1;
1983 /* Clear outstanding MII command interrupts.
1985 fecp->fec_ievent = FEC_ENET_MII;
1987 fecp->fec_imask = FEC_ENET_MII;
1988 fecp->fec_mii_speed = fep->phy_speed;
1991 static int __devinit
1992 fec_probe(struct platform_device *pdev)
1994 struct fec_enet_private *fep;
1995 struct net_device *ndev;
1996 int i, irq, ret = 0;
1999 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2003 r = request_mem_region(r->start, resource_size(r), pdev->name);
2007 /* Init network device */
2008 ndev = alloc_etherdev(sizeof(struct fec_enet_private));
2012 SET_NETDEV_DEV(ndev, &pdev->dev);
2014 /* setup board info structure */
2015 fep = netdev_priv(ndev);
2016 memset(fep, 0, sizeof(*fep));
2018 ndev->base_addr = (unsigned long)ioremap(r->start, resource_size(r));
2020 if (!ndev->base_addr) {
2022 goto failed_ioremap;
2025 platform_set_drvdata(pdev, ndev);
2027 /* This device has up to three irqs on some platforms */
2028 for (i = 0; i < 3; i++) {
2029 irq = platform_get_irq(pdev, i);
2032 ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
2035 irq = platform_get_irq(pdev, i);
2036 free_irq(irq, ndev);
2043 fep->clk = clk_get(&pdev->dev, "fec_clk");
2044 if (IS_ERR(fep->clk)) {
2045 ret = PTR_ERR(fep->clk);
2048 clk_enable(fep->clk);
2050 ret = fec_enet_init(ndev, 0);
2054 ret = register_netdev(ndev);
2056 goto failed_register;
2062 clk_disable(fep->clk);
2065 for (i = 0; i < 3; i++) {
2066 irq = platform_get_irq(pdev, i);
2068 free_irq(irq, ndev);
2071 iounmap((void __iomem *)ndev->base_addr);
2078 static int __devexit
2079 fec_drv_remove(struct platform_device *pdev)
2081 struct net_device *ndev = platform_get_drvdata(pdev);
2082 struct fec_enet_private *fep = netdev_priv(ndev);
2084 platform_set_drvdata(pdev, NULL);
2087 clk_disable(fep->clk);
2089 iounmap((void __iomem *)ndev->base_addr);
2090 unregister_netdev(ndev);
2096 fec_suspend(struct platform_device *dev, pm_message_t state)
2098 struct net_device *ndev = platform_get_drvdata(dev);
2099 struct fec_enet_private *fep;
2102 fep = netdev_priv(ndev);
2103 if (netif_running(ndev)) {
2104 netif_device_detach(ndev);
2112 fec_resume(struct platform_device *dev)
2114 struct net_device *ndev = platform_get_drvdata(dev);
2117 if (netif_running(ndev)) {
2118 fec_enet_init(ndev, 0);
2119 netif_device_attach(ndev);
2125 static struct platform_driver fec_driver = {
2128 .owner = THIS_MODULE,
2131 .remove = __devexit_p(fec_drv_remove),
2132 .suspend = fec_suspend,
2133 .resume = fec_resume,
2137 fec_enet_module_init(void)
2139 printk(KERN_INFO "FEC Ethernet Driver\n");
2141 return platform_driver_register(&fec_driver);
2145 fec_enet_cleanup(void)
2147 platform_driver_unregister(&fec_driver);
2150 module_exit(fec_enet_cleanup);
2151 module_init(fec_enet_module_init);
2153 MODULE_LICENSE("GPL");