1 | /* |
2 | * Driver for the MPC5200 Fast Ethernet Controller |
3 | * |
4 | * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and |
5 | * now maintained by Sylvain Munaut <tnt@246tNt.com> |
6 | * |
7 | * Copyright (C) 2007 Domen Puncer, Telargo, Inc. |
8 | * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com> |
9 | * Copyright (C) 2003-2004 MontaVista, Software, Inc. |
10 | * |
11 | * This file is licensed under the terms of the GNU General Public License |
12 | * version 2. This program is licensed "as is" without any warranty of any |
13 | * kind, whether express or implied. |
14 | * |
15 | */ |
16 | |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | |
19 | #include <linux/dma-mapping.h> |
20 | #include <linux/module.h> |
21 | |
22 | #include <linux/kernel.h> |
23 | #include <linux/types.h> |
24 | #include <linux/spinlock.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/errno.h> |
27 | #include <linux/init.h> |
28 | #include <linux/interrupt.h> |
29 | #include <linux/crc32.h> |
30 | #include <linux/hardirq.h> |
31 | #include <linux/delay.h> |
32 | #include <linux/of.h> |
33 | #include <linux/of_address.h> |
34 | #include <linux/of_irq.h> |
35 | #include <linux/of_mdio.h> |
36 | #include <linux/of_net.h> |
37 | #include <linux/platform_device.h> |
38 | |
39 | #include <linux/netdevice.h> |
40 | #include <linux/etherdevice.h> |
41 | #include <linux/ethtool.h> |
42 | #include <linux/skbuff.h> |
43 | |
44 | #include <asm/io.h> |
45 | #include <asm/delay.h> |
46 | #include <asm/mpc52xx.h> |
47 | |
48 | #include <linux/fsl/bestcomm/bestcomm.h> |
49 | #include <linux/fsl/bestcomm/fec.h> |
50 | |
51 | #include "fec_mpc52xx.h" |
52 | |
53 | #define DRIVER_NAME "mpc52xx-fec" |
54 | |
55 | /* Private driver data structure */ |
56 | struct mpc52xx_fec_priv { |
57 | struct net_device *ndev; |
58 | int duplex; |
59 | int speed; |
60 | int r_irq; |
61 | int t_irq; |
62 | struct mpc52xx_fec __iomem *fec; |
63 | struct bcom_task *rx_dmatsk; |
64 | struct bcom_task *tx_dmatsk; |
65 | spinlock_t lock; |
66 | int msg_enable; |
67 | |
68 | /* MDIO link details */ |
69 | unsigned int mdio_speed; |
70 | struct device_node *phy_node; |
71 | enum phy_state link; |
72 | int seven_wire_mode; |
73 | }; |
74 | |
75 | |
76 | static irqreturn_t mpc52xx_fec_interrupt(int, void *); |
77 | static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *); |
78 | static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *); |
79 | static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep); |
80 | static void mpc52xx_fec_start(struct net_device *dev); |
81 | static void mpc52xx_fec_reset(struct net_device *dev); |
82 | |
83 | #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \ |
84 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) |
85 | static int debug = -1; /* the above default */ |
86 | module_param(debug, int, 0); |
87 | MODULE_PARM_DESC(debug, "debugging messages level" ); |
88 | |
89 | static void mpc52xx_fec_tx_timeout(struct net_device *dev, unsigned int txqueue) |
90 | { |
91 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
92 | unsigned long flags; |
93 | |
94 | dev_warn(&dev->dev, "transmit timed out\n" ); |
95 | |
96 | spin_lock_irqsave(&priv->lock, flags); |
97 | mpc52xx_fec_reset(dev); |
98 | dev->stats.tx_errors++; |
99 | spin_unlock_irqrestore(lock: &priv->lock, flags); |
100 | |
101 | netif_wake_queue(dev); |
102 | } |
103 | |
104 | static void mpc52xx_fec_set_paddr(struct net_device *dev, const u8 *mac) |
105 | { |
106 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
107 | struct mpc52xx_fec __iomem *fec = priv->fec; |
108 | |
109 | out_be32(&fec->paddr1, *(const u32 *)(&mac[0])); |
110 | out_be32(&fec->paddr2, (*(const u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE); |
111 | } |
112 | |
113 | static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr) |
114 | { |
115 | struct sockaddr *sock = addr; |
116 | |
117 | eth_hw_addr_set(dev, addr: sock->sa_data); |
118 | |
119 | mpc52xx_fec_set_paddr(dev, mac: sock->sa_data); |
120 | return 0; |
121 | } |
122 | |
123 | static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s) |
124 | { |
125 | while (!bcom_queue_empty(tsk: s)) { |
126 | struct bcom_fec_bd *bd; |
127 | struct sk_buff *skb; |
128 | |
129 | skb = bcom_retrieve_buffer(tsk: s, NULL, p_bd: (struct bcom_bd **)&bd); |
130 | dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
131 | DMA_FROM_DEVICE); |
132 | kfree_skb(skb); |
133 | } |
134 | } |
135 | |
136 | static void |
137 | mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb) |
138 | { |
139 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
140 | struct bcom_fec_bd *bd; |
141 | |
142 | bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(tsk: priv->rx_dmatsk); |
143 | bd->status = FEC_RX_BUFFER_SIZE; |
144 | bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data, |
145 | FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); |
146 | bcom_submit_next_buffer(tsk: priv->rx_dmatsk, cookie: rskb); |
147 | } |
148 | |
149 | static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk) |
150 | { |
151 | struct sk_buff *skb; |
152 | |
153 | while (!bcom_queue_full(tsk: rxtsk)) { |
154 | skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
155 | if (!skb) |
156 | return -EAGAIN; |
157 | |
158 | /* zero out the initial receive buffers to aid debugging */ |
159 | memset(skb->data, 0, FEC_RX_BUFFER_SIZE); |
160 | mpc52xx_fec_rx_submit(dev, rskb: skb); |
161 | } |
162 | return 0; |
163 | } |
164 | |
165 | /* based on generic_adjust_link from fs_enet-main.c */ |
166 | static void mpc52xx_fec_adjust_link(struct net_device *dev) |
167 | { |
168 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
169 | struct phy_device *phydev = dev->phydev; |
170 | int new_state = 0; |
171 | |
172 | if (phydev->link != PHY_DOWN) { |
173 | if (phydev->duplex != priv->duplex) { |
174 | struct mpc52xx_fec __iomem *fec = priv->fec; |
175 | u32 rcntrl; |
176 | u32 tcntrl; |
177 | |
178 | new_state = 1; |
179 | priv->duplex = phydev->duplex; |
180 | |
181 | rcntrl = in_be32(&fec->r_cntrl); |
182 | tcntrl = in_be32(&fec->x_cntrl); |
183 | |
184 | rcntrl &= ~FEC_RCNTRL_DRT; |
185 | tcntrl &= ~FEC_TCNTRL_FDEN; |
186 | if (phydev->duplex == DUPLEX_FULL) |
187 | tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */ |
188 | else |
189 | rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ |
190 | |
191 | out_be32(&fec->r_cntrl, rcntrl); |
192 | out_be32(&fec->x_cntrl, tcntrl); |
193 | } |
194 | |
195 | if (phydev->speed != priv->speed) { |
196 | new_state = 1; |
197 | priv->speed = phydev->speed; |
198 | } |
199 | |
200 | if (priv->link == PHY_DOWN) { |
201 | new_state = 1; |
202 | priv->link = phydev->link; |
203 | } |
204 | |
205 | } else if (priv->link) { |
206 | new_state = 1; |
207 | priv->link = PHY_DOWN; |
208 | priv->speed = 0; |
209 | priv->duplex = -1; |
210 | } |
211 | |
212 | if (new_state && netif_msg_link(priv)) |
213 | phy_print_status(phydev); |
214 | } |
215 | |
216 | static int mpc52xx_fec_open(struct net_device *dev) |
217 | { |
218 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
219 | struct phy_device *phydev = NULL; |
220 | int err = -EBUSY; |
221 | |
222 | if (priv->phy_node) { |
223 | phydev = of_phy_connect(dev: priv->ndev, phy_np: priv->phy_node, |
224 | hndlr: mpc52xx_fec_adjust_link, flags: 0, iface: 0); |
225 | if (!phydev) { |
226 | dev_err(&dev->dev, "of_phy_connect failed\n" ); |
227 | return -ENODEV; |
228 | } |
229 | phy_start(phydev); |
230 | } |
231 | |
232 | if (request_irq(irq: dev->irq, handler: mpc52xx_fec_interrupt, IRQF_SHARED, |
233 | DRIVER_NAME "_ctrl" , dev)) { |
234 | dev_err(&dev->dev, "ctrl interrupt request failed\n" ); |
235 | goto free_phy; |
236 | } |
237 | if (request_irq(irq: priv->r_irq, handler: mpc52xx_fec_rx_interrupt, flags: 0, |
238 | DRIVER_NAME "_rx" , dev)) { |
239 | dev_err(&dev->dev, "rx interrupt request failed\n" ); |
240 | goto free_ctrl_irq; |
241 | } |
242 | if (request_irq(irq: priv->t_irq, handler: mpc52xx_fec_tx_interrupt, flags: 0, |
243 | DRIVER_NAME "_tx" , dev)) { |
244 | dev_err(&dev->dev, "tx interrupt request failed\n" ); |
245 | goto free_2irqs; |
246 | } |
247 | |
248 | bcom_fec_rx_reset(tsk: priv->rx_dmatsk); |
249 | bcom_fec_tx_reset(tsk: priv->tx_dmatsk); |
250 | |
251 | err = mpc52xx_fec_alloc_rx_buffers(dev, rxtsk: priv->rx_dmatsk); |
252 | if (err) { |
253 | dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n" ); |
254 | goto free_irqs; |
255 | } |
256 | |
257 | bcom_enable(tsk: priv->rx_dmatsk); |
258 | bcom_enable(tsk: priv->tx_dmatsk); |
259 | |
260 | mpc52xx_fec_start(dev); |
261 | |
262 | netif_start_queue(dev); |
263 | |
264 | return 0; |
265 | |
266 | free_irqs: |
267 | free_irq(priv->t_irq, dev); |
268 | free_2irqs: |
269 | free_irq(priv->r_irq, dev); |
270 | free_ctrl_irq: |
271 | free_irq(dev->irq, dev); |
272 | free_phy: |
273 | if (phydev) { |
274 | phy_stop(phydev); |
275 | phy_disconnect(phydev); |
276 | } |
277 | |
278 | return err; |
279 | } |
280 | |
281 | static int mpc52xx_fec_close(struct net_device *dev) |
282 | { |
283 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
284 | struct phy_device *phydev = dev->phydev; |
285 | |
286 | netif_stop_queue(dev); |
287 | |
288 | mpc52xx_fec_stop(dev, may_sleep: true); |
289 | |
290 | mpc52xx_fec_free_rx_buffers(dev, s: priv->rx_dmatsk); |
291 | |
292 | free_irq(dev->irq, dev); |
293 | free_irq(priv->r_irq, dev); |
294 | free_irq(priv->t_irq, dev); |
295 | |
296 | if (phydev) { |
297 | /* power down phy */ |
298 | phy_stop(phydev); |
299 | phy_disconnect(phydev); |
300 | } |
301 | |
302 | return 0; |
303 | } |
304 | |
305 | /* This will only be invoked if your driver is _not_ in XOFF state. |
306 | * What this means is that you need not check it, and that this |
307 | * invariant will hold if you make sure that the netif_*_queue() |
308 | * calls are done at the proper times. |
309 | */ |
310 | static netdev_tx_t |
311 | mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev) |
312 | { |
313 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
314 | struct bcom_fec_bd *bd; |
315 | unsigned long flags; |
316 | |
317 | if (bcom_queue_full(tsk: priv->tx_dmatsk)) { |
318 | if (net_ratelimit()) |
319 | dev_err(&dev->dev, "transmit queue overrun\n" ); |
320 | return NETDEV_TX_BUSY; |
321 | } |
322 | |
323 | spin_lock_irqsave(&priv->lock, flags); |
324 | |
325 | bd = (struct bcom_fec_bd *) |
326 | bcom_prepare_next_buffer(tsk: priv->tx_dmatsk); |
327 | |
328 | bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC; |
329 | bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len, |
330 | DMA_TO_DEVICE); |
331 | |
332 | skb_tx_timestamp(skb); |
333 | bcom_submit_next_buffer(tsk: priv->tx_dmatsk, cookie: skb); |
334 | spin_unlock_irqrestore(lock: &priv->lock, flags); |
335 | |
336 | if (bcom_queue_full(tsk: priv->tx_dmatsk)) { |
337 | netif_stop_queue(dev); |
338 | } |
339 | |
340 | return NETDEV_TX_OK; |
341 | } |
342 | |
343 | #ifdef CONFIG_NET_POLL_CONTROLLER |
344 | static void mpc52xx_fec_poll_controller(struct net_device *dev) |
345 | { |
346 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
347 | |
348 | disable_irq(irq: priv->t_irq); |
349 | mpc52xx_fec_tx_interrupt(priv->t_irq, dev); |
350 | enable_irq(irq: priv->t_irq); |
351 | disable_irq(irq: priv->r_irq); |
352 | mpc52xx_fec_rx_interrupt(priv->r_irq, dev); |
353 | enable_irq(irq: priv->r_irq); |
354 | } |
355 | #endif |
356 | |
357 | |
358 | /* This handles BestComm transmit task interrupts |
359 | */ |
360 | static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id) |
361 | { |
362 | struct net_device *dev = dev_id; |
363 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
364 | |
365 | spin_lock(lock: &priv->lock); |
366 | while (bcom_buffer_done(tsk: priv->tx_dmatsk)) { |
367 | struct sk_buff *skb; |
368 | struct bcom_fec_bd *bd; |
369 | skb = bcom_retrieve_buffer(tsk: priv->tx_dmatsk, NULL, |
370 | p_bd: (struct bcom_bd **)&bd); |
371 | dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
372 | DMA_TO_DEVICE); |
373 | |
374 | dev_consume_skb_irq(skb); |
375 | } |
376 | spin_unlock(lock: &priv->lock); |
377 | |
378 | netif_wake_queue(dev); |
379 | |
380 | return IRQ_HANDLED; |
381 | } |
382 | |
383 | static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id) |
384 | { |
385 | struct net_device *dev = dev_id; |
386 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
387 | struct sk_buff *rskb; /* received sk_buff */ |
388 | struct sk_buff *skb; /* new sk_buff to enqueue in its place */ |
389 | struct bcom_fec_bd *bd; |
390 | u32 status, physaddr; |
391 | int length; |
392 | |
393 | spin_lock(lock: &priv->lock); |
394 | |
395 | while (bcom_buffer_done(tsk: priv->rx_dmatsk)) { |
396 | |
397 | rskb = bcom_retrieve_buffer(tsk: priv->rx_dmatsk, p_status: &status, |
398 | p_bd: (struct bcom_bd **)&bd); |
399 | physaddr = bd->skb_pa; |
400 | |
401 | /* Test for errors in received frame */ |
402 | if (status & BCOM_FEC_RX_BD_ERRORS) { |
403 | /* Drop packet and reuse the buffer */ |
404 | mpc52xx_fec_rx_submit(dev, rskb); |
405 | dev->stats.rx_dropped++; |
406 | continue; |
407 | } |
408 | |
409 | /* skbs are allocated on open, so now we allocate a new one, |
410 | * and remove the old (with the packet) */ |
411 | skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
412 | if (!skb) { |
413 | /* Can't get a new one : reuse the same & drop pkt */ |
414 | dev_notice(&dev->dev, "Low memory - dropped packet.\n" ); |
415 | mpc52xx_fec_rx_submit(dev, rskb); |
416 | dev->stats.rx_dropped++; |
417 | continue; |
418 | } |
419 | |
420 | /* Enqueue the new sk_buff back on the hardware */ |
421 | mpc52xx_fec_rx_submit(dev, rskb: skb); |
422 | |
423 | /* Process the received skb - Drop the spin lock while |
424 | * calling into the network stack */ |
425 | spin_unlock(lock: &priv->lock); |
426 | |
427 | dma_unmap_single(dev->dev.parent, physaddr, rskb->len, |
428 | DMA_FROM_DEVICE); |
429 | length = status & BCOM_FEC_RX_BD_LEN_MASK; |
430 | skb_put(skb: rskb, len: length - 4); /* length without CRC32 */ |
431 | rskb->protocol = eth_type_trans(skb: rskb, dev); |
432 | if (!skb_defer_rx_timestamp(skb: rskb)) |
433 | netif_rx(skb: rskb); |
434 | |
435 | spin_lock(lock: &priv->lock); |
436 | } |
437 | |
438 | spin_unlock(lock: &priv->lock); |
439 | |
440 | return IRQ_HANDLED; |
441 | } |
442 | |
443 | static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id) |
444 | { |
445 | struct net_device *dev = dev_id; |
446 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
447 | struct mpc52xx_fec __iomem *fec = priv->fec; |
448 | u32 ievent; |
449 | |
450 | ievent = in_be32(&fec->ievent); |
451 | |
452 | ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */ |
453 | if (!ievent) |
454 | return IRQ_NONE; |
455 | |
456 | out_be32(&fec->ievent, ievent); /* clear pending events */ |
457 | |
458 | /* on fifo error, soft-reset fec */ |
459 | if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { |
460 | |
461 | if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) |
462 | dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n" ); |
463 | if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) |
464 | dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n" ); |
465 | |
466 | spin_lock(lock: &priv->lock); |
467 | mpc52xx_fec_reset(dev); |
468 | spin_unlock(lock: &priv->lock); |
469 | |
470 | return IRQ_HANDLED; |
471 | } |
472 | |
473 | if (ievent & ~FEC_IEVENT_TFINT) |
474 | dev_dbg(&dev->dev, "ievent: %08x\n" , ievent); |
475 | |
476 | return IRQ_HANDLED; |
477 | } |
478 | |
479 | /* |
480 | * Get the current statistics. |
481 | * This may be called with the card open or closed. |
482 | */ |
483 | static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev) |
484 | { |
485 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
486 | struct net_device_stats *stats = &dev->stats; |
487 | struct mpc52xx_fec __iomem *fec = priv->fec; |
488 | |
489 | stats->rx_bytes = in_be32(&fec->rmon_r_octets); |
490 | stats->rx_packets = in_be32(&fec->rmon_r_packets); |
491 | stats->rx_errors = in_be32(&fec->rmon_r_crc_align) + |
492 | in_be32(&fec->rmon_r_undersize) + |
493 | in_be32(&fec->rmon_r_oversize) + |
494 | in_be32(&fec->rmon_r_frag) + |
495 | in_be32(&fec->rmon_r_jab); |
496 | |
497 | stats->tx_bytes = in_be32(&fec->rmon_t_octets); |
498 | stats->tx_packets = in_be32(&fec->rmon_t_packets); |
499 | stats->tx_errors = in_be32(&fec->rmon_t_crc_align) + |
500 | in_be32(&fec->rmon_t_undersize) + |
501 | in_be32(&fec->rmon_t_oversize) + |
502 | in_be32(&fec->rmon_t_frag) + |
503 | in_be32(&fec->rmon_t_jab); |
504 | |
505 | stats->multicast = in_be32(&fec->rmon_r_mc_pkt); |
506 | stats->collisions = in_be32(&fec->rmon_t_col); |
507 | |
508 | /* detailed rx_errors: */ |
509 | stats->rx_length_errors = in_be32(&fec->rmon_r_undersize) |
510 | + in_be32(&fec->rmon_r_oversize) |
511 | + in_be32(&fec->rmon_r_frag) |
512 | + in_be32(&fec->rmon_r_jab); |
513 | stats->rx_over_errors = in_be32(&fec->r_macerr); |
514 | stats->rx_crc_errors = in_be32(&fec->ieee_r_crc); |
515 | stats->rx_frame_errors = in_be32(&fec->ieee_r_align); |
516 | stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop); |
517 | stats->rx_missed_errors = in_be32(&fec->rmon_r_drop); |
518 | |
519 | /* detailed tx_errors: */ |
520 | stats->tx_aborted_errors = 0; |
521 | stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr); |
522 | stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop); |
523 | stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe); |
524 | stats->tx_window_errors = in_be32(&fec->ieee_t_lcol); |
525 | |
526 | return stats; |
527 | } |
528 | |
529 | /* |
530 | * Read MIB counters in order to reset them, |
531 | * then zero all the stats fields in memory |
532 | */ |
533 | static void mpc52xx_fec_reset_stats(struct net_device *dev) |
534 | { |
535 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
536 | struct mpc52xx_fec __iomem *fec = priv->fec; |
537 | |
538 | out_be32(&fec->mib_control, FEC_MIB_DISABLE); |
539 | memset_io(&fec->rmon_t_drop, 0, |
540 | offsetof(struct mpc52xx_fec, reserved10) - |
541 | offsetof(struct mpc52xx_fec, rmon_t_drop)); |
542 | out_be32(&fec->mib_control, 0); |
543 | |
544 | memset(&dev->stats, 0, sizeof(dev->stats)); |
545 | } |
546 | |
547 | /* |
548 | * Set or clear the multicast filter for this adaptor. |
549 | */ |
550 | static void mpc52xx_fec_set_multicast_list(struct net_device *dev) |
551 | { |
552 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
553 | struct mpc52xx_fec __iomem *fec = priv->fec; |
554 | u32 rx_control; |
555 | |
556 | rx_control = in_be32(&fec->r_cntrl); |
557 | |
558 | if (dev->flags & IFF_PROMISC) { |
559 | rx_control |= FEC_RCNTRL_PROM; |
560 | out_be32(&fec->r_cntrl, rx_control); |
561 | } else { |
562 | rx_control &= ~FEC_RCNTRL_PROM; |
563 | out_be32(&fec->r_cntrl, rx_control); |
564 | |
565 | if (dev->flags & IFF_ALLMULTI) { |
566 | out_be32(&fec->gaddr1, 0xffffffff); |
567 | out_be32(&fec->gaddr2, 0xffffffff); |
568 | } else { |
569 | u32 crc; |
570 | struct netdev_hw_addr *ha; |
571 | u32 gaddr1 = 0x00000000; |
572 | u32 gaddr2 = 0x00000000; |
573 | |
574 | netdev_for_each_mc_addr(ha, dev) { |
575 | crc = ether_crc_le(6, ha->addr) >> 26; |
576 | if (crc >= 32) |
577 | gaddr1 |= 1 << (crc-32); |
578 | else |
579 | gaddr2 |= 1 << crc; |
580 | } |
581 | out_be32(&fec->gaddr1, gaddr1); |
582 | out_be32(&fec->gaddr2, gaddr2); |
583 | } |
584 | } |
585 | } |
586 | |
587 | /** |
588 | * mpc52xx_fec_hw_init |
589 | * @dev: network device |
590 | * |
591 | * Setup various hardware setting, only needed once on start |
592 | */ |
593 | static void mpc52xx_fec_hw_init(struct net_device *dev) |
594 | { |
595 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
596 | struct mpc52xx_fec __iomem *fec = priv->fec; |
597 | int i; |
598 | |
599 | /* Whack a reset. We should wait for this. */ |
600 | out_be32(&fec->ecntrl, FEC_ECNTRL_RESET); |
601 | for (i = 0; i < FEC_RESET_DELAY; ++i) { |
602 | if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0) |
603 | break; |
604 | udelay(1); |
605 | } |
606 | if (i == FEC_RESET_DELAY) |
607 | dev_err(&dev->dev, "FEC Reset timeout!\n" ); |
608 | |
609 | /* set pause to 0x20 frames */ |
610 | out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20); |
611 | |
612 | /* high service request will be deasserted when there's < 7 bytes in fifo |
613 | * low service request will be deasserted when there's < 4*7 bytes in fifo |
614 | */ |
615 | out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7); |
616 | out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7); |
617 | |
618 | /* alarm when <= x bytes in FIFO */ |
619 | out_be32(&fec->rfifo_alarm, 0x0000030c); |
620 | out_be32(&fec->tfifo_alarm, 0x00000100); |
621 | |
622 | /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */ |
623 | out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B); |
624 | |
625 | /* enable crc generation */ |
626 | out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC); |
627 | out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */ |
628 | out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */ |
629 | |
630 | /* set phy speed. |
631 | * this can't be done in phy driver, since it needs to be called |
632 | * before fec stuff (even on resume) */ |
633 | out_be32(&fec->mii_speed, priv->mdio_speed); |
634 | } |
635 | |
636 | /** |
637 | * mpc52xx_fec_start |
638 | * @dev: network device |
639 | * |
640 | * This function is called to start or restart the FEC during a link |
641 | * change. This happens on fifo errors or when switching between half |
642 | * and full duplex. |
643 | */ |
644 | static void mpc52xx_fec_start(struct net_device *dev) |
645 | { |
646 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
647 | struct mpc52xx_fec __iomem *fec = priv->fec; |
648 | u32 rcntrl; |
649 | u32 tcntrl; |
650 | u32 tmp; |
651 | |
652 | /* clear sticky error bits */ |
653 | tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF; |
654 | out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp); |
655 | out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp); |
656 | |
657 | /* FIFOs will reset on mpc52xx_fec_enable */ |
658 | out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET); |
659 | |
660 | /* Set station address. */ |
661 | mpc52xx_fec_set_paddr(dev, mac: dev->dev_addr); |
662 | |
663 | mpc52xx_fec_set_multicast_list(dev); |
664 | |
665 | /* set max frame len, enable flow control, select mii mode */ |
666 | rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */ |
667 | rcntrl |= FEC_RCNTRL_FCE; |
668 | |
669 | if (!priv->seven_wire_mode) |
670 | rcntrl |= FEC_RCNTRL_MII_MODE; |
671 | |
672 | if (priv->duplex == DUPLEX_FULL) |
673 | tcntrl = FEC_TCNTRL_FDEN; /* FD enable */ |
674 | else { |
675 | rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ |
676 | tcntrl = 0; |
677 | } |
678 | out_be32(&fec->r_cntrl, rcntrl); |
679 | out_be32(&fec->x_cntrl, tcntrl); |
680 | |
681 | /* Clear any outstanding interrupt. */ |
682 | out_be32(&fec->ievent, 0xffffffff); |
683 | |
684 | /* Enable interrupts we wish to service. */ |
685 | out_be32(&fec->imask, FEC_IMASK_ENABLE); |
686 | |
687 | /* And last, enable the transmit and receive processing. */ |
688 | out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN); |
689 | out_be32(&fec->r_des_active, 0x01000000); |
690 | } |
691 | |
692 | /** |
693 | * mpc52xx_fec_stop |
694 | * @dev: network device |
695 | * |
696 | * stop all activity on fec and empty dma buffers |
697 | */ |
698 | static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep) |
699 | { |
700 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
701 | struct mpc52xx_fec __iomem *fec = priv->fec; |
702 | unsigned long timeout; |
703 | |
704 | /* disable all interrupts */ |
705 | out_be32(&fec->imask, 0); |
706 | |
707 | /* Disable the rx task. */ |
708 | bcom_disable(tsk: priv->rx_dmatsk); |
709 | |
710 | /* Wait for tx queue to drain, but only if we're in process context */ |
711 | if (may_sleep) { |
712 | timeout = jiffies + msecs_to_jiffies(m: 2000); |
713 | while (time_before(jiffies, timeout) && |
714 | !bcom_queue_empty(tsk: priv->tx_dmatsk)) |
715 | msleep(msecs: 100); |
716 | |
717 | if (time_after_eq(jiffies, timeout)) |
718 | dev_err(&dev->dev, "queues didn't drain\n" ); |
719 | #if 1 |
720 | if (time_after_eq(jiffies, timeout)) { |
721 | dev_err(&dev->dev, " tx: index: %i, outdex: %i\n" , |
722 | priv->tx_dmatsk->index, |
723 | priv->tx_dmatsk->outdex); |
724 | dev_err(&dev->dev, " rx: index: %i, outdex: %i\n" , |
725 | priv->rx_dmatsk->index, |
726 | priv->rx_dmatsk->outdex); |
727 | } |
728 | #endif |
729 | } |
730 | |
731 | bcom_disable(tsk: priv->tx_dmatsk); |
732 | |
733 | /* Stop FEC */ |
734 | out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN); |
735 | } |
736 | |
737 | /* reset fec and bestcomm tasks */ |
738 | static void mpc52xx_fec_reset(struct net_device *dev) |
739 | { |
740 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
741 | struct mpc52xx_fec __iomem *fec = priv->fec; |
742 | |
743 | mpc52xx_fec_stop(dev, may_sleep: false); |
744 | |
745 | out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status)); |
746 | out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO); |
747 | |
748 | mpc52xx_fec_free_rx_buffers(dev, s: priv->rx_dmatsk); |
749 | |
750 | mpc52xx_fec_hw_init(dev); |
751 | |
752 | bcom_fec_rx_reset(tsk: priv->rx_dmatsk); |
753 | bcom_fec_tx_reset(tsk: priv->tx_dmatsk); |
754 | |
755 | mpc52xx_fec_alloc_rx_buffers(dev, rxtsk: priv->rx_dmatsk); |
756 | |
757 | bcom_enable(tsk: priv->rx_dmatsk); |
758 | bcom_enable(tsk: priv->tx_dmatsk); |
759 | |
760 | mpc52xx_fec_start(dev); |
761 | |
762 | netif_wake_queue(dev); |
763 | } |
764 | |
765 | |
766 | /* ethtool interface */ |
767 | |
768 | static u32 mpc52xx_fec_get_msglevel(struct net_device *dev) |
769 | { |
770 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
771 | return priv->msg_enable; |
772 | } |
773 | |
774 | static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level) |
775 | { |
776 | struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
777 | priv->msg_enable = level; |
778 | } |
779 | |
780 | static const struct ethtool_ops mpc52xx_fec_ethtool_ops = { |
781 | .get_link = ethtool_op_get_link, |
782 | .get_msglevel = mpc52xx_fec_get_msglevel, |
783 | .set_msglevel = mpc52xx_fec_set_msglevel, |
784 | .get_ts_info = ethtool_op_get_ts_info, |
785 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
786 | .set_link_ksettings = phy_ethtool_set_link_ksettings, |
787 | }; |
788 | |
789 | |
790 | static const struct net_device_ops mpc52xx_fec_netdev_ops = { |
791 | .ndo_open = mpc52xx_fec_open, |
792 | .ndo_stop = mpc52xx_fec_close, |
793 | .ndo_start_xmit = mpc52xx_fec_start_xmit, |
794 | .ndo_set_rx_mode = mpc52xx_fec_set_multicast_list, |
795 | .ndo_set_mac_address = mpc52xx_fec_set_mac_address, |
796 | .ndo_validate_addr = eth_validate_addr, |
797 | .ndo_eth_ioctl = phy_do_ioctl, |
798 | .ndo_tx_timeout = mpc52xx_fec_tx_timeout, |
799 | .ndo_get_stats = mpc52xx_fec_get_stats, |
800 | #ifdef CONFIG_NET_POLL_CONTROLLER |
801 | .ndo_poll_controller = mpc52xx_fec_poll_controller, |
802 | #endif |
803 | }; |
804 | |
805 | /* ======================================================================== */ |
806 | /* OF Driver */ |
807 | /* ======================================================================== */ |
808 | |
809 | static int mpc52xx_fec_probe(struct platform_device *op) |
810 | { |
811 | int rv; |
812 | struct net_device *ndev; |
813 | struct mpc52xx_fec_priv *priv = NULL; |
814 | struct resource mem; |
815 | const u32 *prop; |
816 | int prop_size; |
817 | struct device_node *np = op->dev.of_node; |
818 | |
819 | phys_addr_t rx_fifo; |
820 | phys_addr_t tx_fifo; |
821 | |
822 | /* Get the ether ndev & it's private zone */ |
823 | ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv)); |
824 | if (!ndev) |
825 | return -ENOMEM; |
826 | |
827 | priv = netdev_priv(dev: ndev); |
828 | priv->ndev = ndev; |
829 | |
830 | /* Reserve FEC control zone */ |
831 | rv = of_address_to_resource(dev: np, index: 0, r: &mem); |
832 | if (rv) { |
833 | pr_err("Error while parsing device node resource\n" ); |
834 | goto err_netdev; |
835 | } |
836 | if (resource_size(res: &mem) < sizeof(struct mpc52xx_fec)) { |
837 | pr_err("invalid resource size (%lx < %x), check mpc52xx_devices.c\n" , |
838 | (unsigned long)resource_size(&mem), |
839 | sizeof(struct mpc52xx_fec)); |
840 | rv = -EINVAL; |
841 | goto err_netdev; |
842 | } |
843 | |
844 | if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), |
845 | DRIVER_NAME)) { |
846 | rv = -EBUSY; |
847 | goto err_netdev; |
848 | } |
849 | |
850 | /* Init ether ndev with what we have */ |
851 | ndev->netdev_ops = &mpc52xx_fec_netdev_ops; |
852 | ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops; |
853 | ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT; |
854 | ndev->base_addr = mem.start; |
855 | SET_NETDEV_DEV(ndev, &op->dev); |
856 | |
857 | spin_lock_init(&priv->lock); |
858 | |
859 | /* ioremap the zones */ |
860 | priv->fec = ioremap(offset: mem.start, size: sizeof(struct mpc52xx_fec)); |
861 | |
862 | if (!priv->fec) { |
863 | rv = -ENOMEM; |
864 | goto err_mem_region; |
865 | } |
866 | |
867 | /* Bestcomm init */ |
868 | rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data); |
869 | tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data); |
870 | |
871 | priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, fifo: rx_fifo, FEC_RX_BUFFER_SIZE); |
872 | priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, fifo: tx_fifo); |
873 | |
874 | if (!priv->rx_dmatsk || !priv->tx_dmatsk) { |
875 | pr_err("Can not init SDMA tasks\n" ); |
876 | rv = -ENOMEM; |
877 | goto err_rx_tx_dmatsk; |
878 | } |
879 | |
880 | /* Get the IRQ we need one by one */ |
881 | /* Control */ |
882 | ndev->irq = irq_of_parse_and_map(node: np, index: 0); |
883 | |
884 | /* RX */ |
885 | priv->r_irq = bcom_get_task_irq(tsk: priv->rx_dmatsk); |
886 | |
887 | /* TX */ |
888 | priv->t_irq = bcom_get_task_irq(tsk: priv->tx_dmatsk); |
889 | |
890 | /* |
891 | * MAC address init: |
892 | * |
893 | * First try to read MAC address from DT |
894 | */ |
895 | rv = of_get_ethdev_address(np, dev: ndev); |
896 | if (rv) { |
897 | struct mpc52xx_fec __iomem *fec = priv->fec; |
898 | u8 addr[ETH_ALEN] __aligned(4); |
899 | |
900 | /* |
901 | * If the MAC addresse is not provided via DT then read |
902 | * it back from the controller regs |
903 | */ |
904 | *(u32 *)(&addr[0]) = in_be32(&fec->paddr1); |
905 | *(u16 *)(&addr[4]) = in_be32(&fec->paddr2) >> 16; |
906 | eth_hw_addr_set(dev: ndev, addr); |
907 | } |
908 | |
909 | /* |
910 | * Check if the MAC address is valid, if not get a random one |
911 | */ |
912 | if (!is_valid_ether_addr(addr: ndev->dev_addr)) { |
913 | eth_hw_addr_random(dev: ndev); |
914 | dev_warn(&ndev->dev, "using random MAC address %pM\n" , |
915 | ndev->dev_addr); |
916 | } |
917 | |
918 | priv->msg_enable = netif_msg_init(debug_value: debug, MPC52xx_MESSAGES_DEFAULT); |
919 | |
920 | /* |
921 | * Link mode configuration |
922 | */ |
923 | |
924 | /* Start with safe defaults for link connection */ |
925 | priv->speed = 100; |
926 | priv->duplex = DUPLEX_HALF; |
927 | priv->mdio_speed = ((mpc5xxx_get_bus_frequency(&op->dev) >> 20) / 5) << 1; |
928 | |
929 | /* The current speed preconfigures the speed of the MII link */ |
930 | prop = of_get_property(node: np, name: "current-speed" , lenp: &prop_size); |
931 | if (prop && (prop_size >= sizeof(u32) * 2)) { |
932 | priv->speed = prop[0]; |
933 | priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF; |
934 | } |
935 | |
936 | /* If there is a phy handle, then get the PHY node */ |
937 | priv->phy_node = of_parse_phandle(np, phandle_name: "phy-handle" , index: 0); |
938 | |
939 | /* the 7-wire property means don't use MII mode */ |
940 | if (of_property_read_bool(np, propname: "fsl,7-wire-mode" )) { |
941 | priv->seven_wire_mode = 1; |
942 | dev_info(&ndev->dev, "using 7-wire PHY mode\n" ); |
943 | } |
944 | |
945 | /* Hardware init */ |
946 | mpc52xx_fec_hw_init(dev: ndev); |
947 | mpc52xx_fec_reset_stats(dev: ndev); |
948 | |
949 | rv = register_netdev(dev: ndev); |
950 | if (rv < 0) |
951 | goto err_node; |
952 | |
953 | /* We're done ! */ |
954 | platform_set_drvdata(pdev: op, data: ndev); |
955 | netdev_info(dev: ndev, format: "%pOF MAC %pM\n" , |
956 | op->dev.of_node, ndev->dev_addr); |
957 | |
958 | return 0; |
959 | |
960 | err_node: |
961 | of_node_put(node: priv->phy_node); |
962 | irq_dispose_mapping(virq: ndev->irq); |
963 | err_rx_tx_dmatsk: |
964 | if (priv->rx_dmatsk) |
965 | bcom_fec_rx_release(tsk: priv->rx_dmatsk); |
966 | if (priv->tx_dmatsk) |
967 | bcom_fec_tx_release(tsk: priv->tx_dmatsk); |
968 | iounmap(addr: priv->fec); |
969 | err_mem_region: |
970 | release_mem_region(mem.start, sizeof(struct mpc52xx_fec)); |
971 | err_netdev: |
972 | free_netdev(dev: ndev); |
973 | |
974 | return rv; |
975 | } |
976 | |
977 | static void |
978 | mpc52xx_fec_remove(struct platform_device *op) |
979 | { |
980 | struct net_device *ndev; |
981 | struct mpc52xx_fec_priv *priv; |
982 | |
983 | ndev = platform_get_drvdata(pdev: op); |
984 | priv = netdev_priv(dev: ndev); |
985 | |
986 | unregister_netdev(dev: ndev); |
987 | |
988 | of_node_put(node: priv->phy_node); |
989 | priv->phy_node = NULL; |
990 | |
991 | irq_dispose_mapping(virq: ndev->irq); |
992 | |
993 | bcom_fec_rx_release(tsk: priv->rx_dmatsk); |
994 | bcom_fec_tx_release(tsk: priv->tx_dmatsk); |
995 | |
996 | iounmap(addr: priv->fec); |
997 | |
998 | release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec)); |
999 | |
1000 | free_netdev(dev: ndev); |
1001 | } |
1002 | |
1003 | #ifdef CONFIG_PM |
1004 | static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state) |
1005 | { |
1006 | struct net_device *dev = platform_get_drvdata(pdev: op); |
1007 | |
1008 | if (netif_running(dev)) |
1009 | mpc52xx_fec_close(dev); |
1010 | |
1011 | return 0; |
1012 | } |
1013 | |
1014 | static int mpc52xx_fec_of_resume(struct platform_device *op) |
1015 | { |
1016 | struct net_device *dev = platform_get_drvdata(pdev: op); |
1017 | |
1018 | mpc52xx_fec_hw_init(dev); |
1019 | mpc52xx_fec_reset_stats(dev); |
1020 | |
1021 | if (netif_running(dev)) |
1022 | mpc52xx_fec_open(dev); |
1023 | |
1024 | return 0; |
1025 | } |
1026 | #endif |
1027 | |
1028 | static const struct of_device_id mpc52xx_fec_match[] = { |
1029 | { .compatible = "fsl,mpc5200b-fec" , }, |
1030 | { .compatible = "fsl,mpc5200-fec" , }, |
1031 | { .compatible = "mpc5200-fec" , }, |
1032 | { } |
1033 | }; |
1034 | |
1035 | MODULE_DEVICE_TABLE(of, mpc52xx_fec_match); |
1036 | |
1037 | static struct platform_driver mpc52xx_fec_driver = { |
1038 | .driver = { |
1039 | .name = DRIVER_NAME, |
1040 | .of_match_table = mpc52xx_fec_match, |
1041 | }, |
1042 | .probe = mpc52xx_fec_probe, |
1043 | .remove_new = mpc52xx_fec_remove, |
1044 | #ifdef CONFIG_PM |
1045 | .suspend = mpc52xx_fec_of_suspend, |
1046 | .resume = mpc52xx_fec_of_resume, |
1047 | #endif |
1048 | }; |
1049 | |
1050 | |
1051 | /* ======================================================================== */ |
1052 | /* Module */ |
1053 | /* ======================================================================== */ |
1054 | |
1055 | static struct platform_driver * const drivers[] = { |
1056 | #ifdef CONFIG_FEC_MPC52xx_MDIO |
1057 | &mpc52xx_fec_mdio_driver, |
1058 | #endif |
1059 | &mpc52xx_fec_driver, |
1060 | }; |
1061 | |
1062 | static int __init |
1063 | mpc52xx_fec_init(void) |
1064 | { |
1065 | return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
1066 | } |
1067 | |
1068 | static void __exit |
1069 | mpc52xx_fec_exit(void) |
1070 | { |
1071 | platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
1072 | } |
1073 | |
1074 | |
1075 | module_init(mpc52xx_fec_init); |
1076 | module_exit(mpc52xx_fec_exit); |
1077 | |
1078 | MODULE_LICENSE("GPL" ); |
1079 | MODULE_AUTHOR("Dale Farnsworth" ); |
1080 | MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC" ); |
1081 | |