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Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001/*
2 * Atmel MACB Ethernet Controller driver
3 *
4 * Copyright (C) 2004-2006 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/clk.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/kernel.h>
15#include <linux/types.h>
16#include <linux/slab.h>
17#include <linux/init.h>
18#include <linux/netdevice.h>
19#include <linux/etherdevice.h>
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010020#include <linux/dma-mapping.h>
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010021#include <linux/platform_device.h>
frederic RODO6c36a702007-07-12 19:07:24 +020022#include <linux/phy.h>
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010023
Russell Kinga09e64f2008-08-05 16:14:15 +010024#include <mach/board.h>
25#include <mach/cpu.h>
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010026
27#include "macb.h"
28
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010029#define RX_BUFFER_SIZE 128
30#define RX_RING_SIZE 512
31#define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE)
32
33/* Make the IP header word-aligned (the ethernet header is 14 bytes) */
34#define RX_OFFSET 2
35
36#define TX_RING_SIZE 128
37#define DEF_TX_RING_PENDING (TX_RING_SIZE - 1)
38#define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE)
39
40#define TX_RING_GAP(bp) \
41 (TX_RING_SIZE - (bp)->tx_pending)
42#define TX_BUFFS_AVAIL(bp) \
43 (((bp)->tx_tail <= (bp)->tx_head) ? \
44 (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \
45 (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp))
46#define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1))
47
48#define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1))
49
50/* minimum number of free TX descriptors before waking up TX process */
51#define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4)
52
53#define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \
54 | MACB_BIT(ISR_ROVR))
55
56static void __macb_set_hwaddr(struct macb *bp)
57{
58 u32 bottom;
59 u16 top;
60
61 bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
62 macb_writel(bp, SA1B, bottom);
63 top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
64 macb_writel(bp, SA1T, top);
65}
66
67static void __init macb_get_hwaddr(struct macb *bp)
68{
69 u32 bottom;
70 u16 top;
71 u8 addr[6];
72
73 bottom = macb_readl(bp, SA1B);
74 top = macb_readl(bp, SA1T);
75
76 addr[0] = bottom & 0xff;
77 addr[1] = (bottom >> 8) & 0xff;
78 addr[2] = (bottom >> 16) & 0xff;
79 addr[3] = (bottom >> 24) & 0xff;
80 addr[4] = top & 0xff;
81 addr[5] = (top >> 8) & 0xff;
82
Sven Schnelled1d57412008-06-09 16:33:57 -070083 if (is_valid_ether_addr(addr)) {
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010084 memcpy(bp->dev->dev_addr, addr, sizeof(addr));
Sven Schnelled1d57412008-06-09 16:33:57 -070085 } else {
86 dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
87 random_ether_addr(bp->dev->dev_addr);
88 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010089}
90
frederic RODO6c36a702007-07-12 19:07:24 +020091static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010092{
frederic RODO6c36a702007-07-12 19:07:24 +020093 struct macb *bp = bus->priv;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010094 int value;
95
Haavard Skinnemoen89e57852006-11-09 14:51:17 +010096 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
97 | MACB_BF(RW, MACB_MAN_READ)
frederic RODO6c36a702007-07-12 19:07:24 +020098 | MACB_BF(PHYA, mii_id)
99 | MACB_BF(REGA, regnum)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100100 | MACB_BF(CODE, MACB_MAN_CODE)));
101
frederic RODO6c36a702007-07-12 19:07:24 +0200102 /* wait for end of transfer */
103 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
104 cpu_relax();
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100105
106 value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100107
108 return value;
109}
110
frederic RODO6c36a702007-07-12 19:07:24 +0200111static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
112 u16 value)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100113{
frederic RODO6c36a702007-07-12 19:07:24 +0200114 struct macb *bp = bus->priv;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100115
116 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
117 | MACB_BF(RW, MACB_MAN_WRITE)
frederic RODO6c36a702007-07-12 19:07:24 +0200118 | MACB_BF(PHYA, mii_id)
119 | MACB_BF(REGA, regnum)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100120 | MACB_BF(CODE, MACB_MAN_CODE)
frederic RODO6c36a702007-07-12 19:07:24 +0200121 | MACB_BF(DATA, value)));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100122
frederic RODO6c36a702007-07-12 19:07:24 +0200123 /* wait for end of transfer */
124 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
125 cpu_relax();
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100126
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100127 return 0;
128}
129
frederic RODO6c36a702007-07-12 19:07:24 +0200130static int macb_mdio_reset(struct mii_bus *bus)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100131{
frederic RODO6c36a702007-07-12 19:07:24 +0200132 return 0;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100133}
134
frederic RODO6c36a702007-07-12 19:07:24 +0200135static void macb_handle_link_change(struct net_device *dev)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100136{
frederic RODO6c36a702007-07-12 19:07:24 +0200137 struct macb *bp = netdev_priv(dev);
138 struct phy_device *phydev = bp->phy_dev;
139 unsigned long flags;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100140
frederic RODO6c36a702007-07-12 19:07:24 +0200141 int status_change = 0;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100142
frederic RODO6c36a702007-07-12 19:07:24 +0200143 spin_lock_irqsave(&bp->lock, flags);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100144
frederic RODO6c36a702007-07-12 19:07:24 +0200145 if (phydev->link) {
146 if ((bp->speed != phydev->speed) ||
147 (bp->duplex != phydev->duplex)) {
148 u32 reg;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100149
frederic RODO6c36a702007-07-12 19:07:24 +0200150 reg = macb_readl(bp, NCFGR);
151 reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
152
153 if (phydev->duplex)
154 reg |= MACB_BIT(FD);
Atsushi Nemoto179956f2008-02-21 22:50:54 +0900155 if (phydev->speed == SPEED_100)
frederic RODO6c36a702007-07-12 19:07:24 +0200156 reg |= MACB_BIT(SPD);
157
158 macb_writel(bp, NCFGR, reg);
159
160 bp->speed = phydev->speed;
161 bp->duplex = phydev->duplex;
162 status_change = 1;
163 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100164 }
165
frederic RODO6c36a702007-07-12 19:07:24 +0200166 if (phydev->link != bp->link) {
Anton Vorontsovc8f15682008-07-22 15:41:24 -0700167 if (!phydev->link) {
frederic RODO6c36a702007-07-12 19:07:24 +0200168 bp->speed = 0;
169 bp->duplex = -1;
170 }
171 bp->link = phydev->link;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100172
frederic RODO6c36a702007-07-12 19:07:24 +0200173 status_change = 1;
174 }
175
176 spin_unlock_irqrestore(&bp->lock, flags);
177
178 if (status_change) {
179 if (phydev->link)
180 printk(KERN_INFO "%s: link up (%d/%s)\n",
181 dev->name, phydev->speed,
182 DUPLEX_FULL == phydev->duplex ? "Full":"Half");
183 else
184 printk(KERN_INFO "%s: link down\n", dev->name);
185 }
186}
187
188/* based on au1000_eth. c*/
189static int macb_mii_probe(struct net_device *dev)
190{
191 struct macb *bp = netdev_priv(dev);
Jiri Pirko7455a762010-02-08 05:12:08 +0000192 struct phy_device *phydev;
frederic RODO6c36a702007-07-12 19:07:24 +0200193 struct eth_platform_data *pdata;
Jiri Pirko7455a762010-02-08 05:12:08 +0000194 int ret;
frederic RODO6c36a702007-07-12 19:07:24 +0200195
Jiri Pirko7455a762010-02-08 05:12:08 +0000196 phydev = phy_find_first(bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200197 if (!phydev) {
198 printk (KERN_ERR "%s: no PHY found\n", dev->name);
199 return -1;
200 }
201
202 pdata = bp->pdev->dev.platform_data;
203 /* TODO : add pin_irq */
204
205 /* attach the mac to the phy */
Jiri Pirko7455a762010-02-08 05:12:08 +0000206 ret = phy_connect_direct(dev, phydev, &macb_handle_link_change, 0,
207 pdata && pdata->is_rmii ?
208 PHY_INTERFACE_MODE_RMII :
209 PHY_INTERFACE_MODE_MII);
210 if (ret) {
frederic RODO6c36a702007-07-12 19:07:24 +0200211 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
Jiri Pirko7455a762010-02-08 05:12:08 +0000212 return ret;
frederic RODO6c36a702007-07-12 19:07:24 +0200213 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100214
frederic RODO6c36a702007-07-12 19:07:24 +0200215 /* mask with MAC supported features */
216 phydev->supported &= PHY_BASIC_FEATURES;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100217
frederic RODO6c36a702007-07-12 19:07:24 +0200218 phydev->advertising = phydev->supported;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100219
frederic RODO6c36a702007-07-12 19:07:24 +0200220 bp->link = 0;
221 bp->speed = 0;
222 bp->duplex = -1;
223 bp->phy_dev = phydev;
224
225 return 0;
226}
227
228static int macb_mii_init(struct macb *bp)
229{
230 struct eth_platform_data *pdata;
231 int err = -ENXIO, i;
232
Uwe Kleine-Koenig3dbda772009-07-23 08:31:31 +0200233 /* Enable management port */
frederic RODO6c36a702007-07-12 19:07:24 +0200234 macb_writel(bp, NCR, MACB_BIT(MPE));
235
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700236 bp->mii_bus = mdiobus_alloc();
237 if (bp->mii_bus == NULL) {
frederic RODO6c36a702007-07-12 19:07:24 +0200238 err = -ENOMEM;
239 goto err_out;
240 }
241
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700242 bp->mii_bus->name = "MACB_mii_bus";
243 bp->mii_bus->read = &macb_mdio_read;
244 bp->mii_bus->write = &macb_mdio_write;
245 bp->mii_bus->reset = &macb_mdio_reset;
246 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
247 bp->mii_bus->priv = bp;
248 bp->mii_bus->parent = &bp->dev->dev;
249 pdata = bp->pdev->dev.platform_data;
250
251 if (pdata)
252 bp->mii_bus->phy_mask = pdata->phy_mask;
253
254 bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
255 if (!bp->mii_bus->irq) {
256 err = -ENOMEM;
257 goto err_out_free_mdiobus;
258 }
259
frederic RODO6c36a702007-07-12 19:07:24 +0200260 for (i = 0; i < PHY_MAX_ADDR; i++)
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700261 bp->mii_bus->irq[i] = PHY_POLL;
frederic RODO6c36a702007-07-12 19:07:24 +0200262
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700263 platform_set_drvdata(bp->dev, bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200264
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700265 if (mdiobus_register(bp->mii_bus))
frederic RODO6c36a702007-07-12 19:07:24 +0200266 goto err_out_free_mdio_irq;
267
268 if (macb_mii_probe(bp->dev) != 0) {
269 goto err_out_unregister_bus;
270 }
271
272 return 0;
273
274err_out_unregister_bus:
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700275 mdiobus_unregister(bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200276err_out_free_mdio_irq:
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700277 kfree(bp->mii_bus->irq);
278err_out_free_mdiobus:
279 mdiobus_free(bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200280err_out:
281 return err;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100282}
283
284static void macb_update_stats(struct macb *bp)
285{
286 u32 __iomem *reg = bp->regs + MACB_PFR;
287 u32 *p = &bp->hw_stats.rx_pause_frames;
288 u32 *end = &bp->hw_stats.tx_pause_frames + 1;
289
290 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
291
292 for(; p < end; p++, reg++)
Haavard Skinnemoen0f0d84e2006-12-08 14:38:30 +0100293 *p += __raw_readl(reg);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100294}
295
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100296static void macb_tx(struct macb *bp)
297{
298 unsigned int tail;
299 unsigned int head;
300 u32 status;
301
302 status = macb_readl(bp, TSR);
303 macb_writel(bp, TSR, status);
304
305 dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n",
306 (unsigned long)status);
307
Erik Walingee33c582009-04-15 23:32:10 +0000308 if (status & (MACB_BIT(UND) | MACB_BIT(TSR_RLE))) {
Gregory CLEMENTbdcba1512007-12-19 18:23:44 +0100309 int i;
Erik Walingee33c582009-04-15 23:32:10 +0000310 printk(KERN_ERR "%s: TX %s, resetting buffers\n",
311 bp->dev->name, status & MACB_BIT(UND) ?
312 "underrun" : "retry limit exceeded");
Gregory CLEMENTbdcba1512007-12-19 18:23:44 +0100313
Richard Röjfors39eddb42009-01-18 21:57:35 -0800314 /* Transfer ongoing, disable transmitter, to avoid confusion */
315 if (status & MACB_BIT(TGO))
316 macb_writel(bp, NCR, macb_readl(bp, NCR) & ~MACB_BIT(TE));
317
Gregory CLEMENTbdcba1512007-12-19 18:23:44 +0100318 head = bp->tx_head;
319
320 /*Mark all the buffer as used to avoid sending a lost buffer*/
321 for (i = 0; i < TX_RING_SIZE; i++)
322 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
323
324 /* free transmit buffer in upper layer*/
325 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
326 struct ring_info *rp = &bp->tx_skb[tail];
327 struct sk_buff *skb = rp->skb;
328
329 BUG_ON(skb == NULL);
330
331 rmb();
332
333 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
334 DMA_TO_DEVICE);
335 rp->skb = NULL;
336 dev_kfree_skb_irq(skb);
337 }
338
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100339 bp->tx_head = bp->tx_tail = 0;
Richard Röjfors39eddb42009-01-18 21:57:35 -0800340
341 /* Enable the transmitter again */
342 if (status & MACB_BIT(TGO))
343 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TE));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100344 }
345
346 if (!(status & MACB_BIT(COMP)))
347 /*
348 * This may happen when a buffer becomes complete
349 * between reading the ISR and scanning the
350 * descriptors. Nothing to worry about.
351 */
352 return;
353
354 head = bp->tx_head;
355 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
356 struct ring_info *rp = &bp->tx_skb[tail];
357 struct sk_buff *skb = rp->skb;
358 u32 bufstat;
359
360 BUG_ON(skb == NULL);
361
362 rmb();
363 bufstat = bp->tx_ring[tail].ctrl;
364
365 if (!(bufstat & MACB_BIT(TX_USED)))
366 break;
367
368 dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n",
369 tail, skb->data);
370 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
371 DMA_TO_DEVICE);
372 bp->stats.tx_packets++;
373 bp->stats.tx_bytes += skb->len;
374 rp->skb = NULL;
375 dev_kfree_skb_irq(skb);
376 }
377
378 bp->tx_tail = tail;
379 if (netif_queue_stopped(bp->dev) &&
380 TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH)
381 netif_wake_queue(bp->dev);
382}
383
384static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
385 unsigned int last_frag)
386{
387 unsigned int len;
388 unsigned int frag;
389 unsigned int offset = 0;
390 struct sk_buff *skb;
391
392 len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl);
393
394 dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n",
395 first_frag, last_frag, len);
396
397 skb = dev_alloc_skb(len + RX_OFFSET);
398 if (!skb) {
399 bp->stats.rx_dropped++;
400 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
401 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
402 if (frag == last_frag)
403 break;
404 }
405 wmb();
406 return 1;
407 }
408
409 skb_reserve(skb, RX_OFFSET);
Eric Dumazetbc8acf22010-09-02 13:07:41 -0700410 skb_checksum_none_assert(skb);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100411 skb_put(skb, len);
412
413 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
414 unsigned int frag_len = RX_BUFFER_SIZE;
415
416 if (offset + frag_len > len) {
417 BUG_ON(frag != last_frag);
418 frag_len = len - offset;
419 }
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -0300420 skb_copy_to_linear_data_offset(skb, offset,
421 (bp->rx_buffers +
422 (RX_BUFFER_SIZE * frag)),
423 frag_len);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100424 offset += RX_BUFFER_SIZE;
425 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
426 wmb();
427
428 if (frag == last_frag)
429 break;
430 }
431
432 skb->protocol = eth_type_trans(skb, bp->dev);
433
434 bp->stats.rx_packets++;
435 bp->stats.rx_bytes += len;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100436 dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n",
437 skb->len, skb->csum);
438 netif_receive_skb(skb);
439
440 return 0;
441}
442
443/* Mark DMA descriptors from begin up to and not including end as unused */
444static void discard_partial_frame(struct macb *bp, unsigned int begin,
445 unsigned int end)
446{
447 unsigned int frag;
448
449 for (frag = begin; frag != end; frag = NEXT_RX(frag))
450 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
451 wmb();
452
453 /*
454 * When this happens, the hardware stats registers for
455 * whatever caused this is updated, so we don't have to record
456 * anything.
457 */
458}
459
460static int macb_rx(struct macb *bp, int budget)
461{
462 int received = 0;
463 unsigned int tail = bp->rx_tail;
464 int first_frag = -1;
465
466 for (; budget > 0; tail = NEXT_RX(tail)) {
467 u32 addr, ctrl;
468
469 rmb();
470 addr = bp->rx_ring[tail].addr;
471 ctrl = bp->rx_ring[tail].ctrl;
472
473 if (!(addr & MACB_BIT(RX_USED)))
474 break;
475
476 if (ctrl & MACB_BIT(RX_SOF)) {
477 if (first_frag != -1)
478 discard_partial_frame(bp, first_frag, tail);
479 first_frag = tail;
480 }
481
482 if (ctrl & MACB_BIT(RX_EOF)) {
483 int dropped;
484 BUG_ON(first_frag == -1);
485
486 dropped = macb_rx_frame(bp, first_frag, tail);
487 first_frag = -1;
488 if (!dropped) {
489 received++;
490 budget--;
491 }
492 }
493 }
494
495 if (first_frag != -1)
496 bp->rx_tail = first_frag;
497 else
498 bp->rx_tail = tail;
499
500 return received;
501}
502
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700503static int macb_poll(struct napi_struct *napi, int budget)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100504{
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700505 struct macb *bp = container_of(napi, struct macb, napi);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700506 int work_done;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100507 u32 status;
508
509 status = macb_readl(bp, RSR);
510 macb_writel(bp, RSR, status);
511
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700512 work_done = 0;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100513
514 dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700515 (unsigned long)status, budget);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100516
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700517 work_done = macb_rx(bp, budget);
Joshua Hokeb3363692010-10-25 01:44:22 +0000518 if (work_done < budget) {
Ben Hutchings288379f2009-01-19 16:43:59 -0800519 napi_complete(napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100520
Joshua Hokeb3363692010-10-25 01:44:22 +0000521 /*
522 * We've done what we can to clean the buffers. Make sure we
523 * get notified when new packets arrive.
524 */
525 macb_writel(bp, IER, MACB_RX_INT_FLAGS);
526 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100527
528 /* TODO: Handle errors */
529
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700530 return work_done;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100531}
532
533static irqreturn_t macb_interrupt(int irq, void *dev_id)
534{
535 struct net_device *dev = dev_id;
536 struct macb *bp = netdev_priv(dev);
537 u32 status;
538
539 status = macb_readl(bp, ISR);
540
541 if (unlikely(!status))
542 return IRQ_NONE;
543
544 spin_lock(&bp->lock);
545
546 while (status) {
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100547 /* close possible race with dev_close */
548 if (unlikely(!netif_running(dev))) {
549 macb_writel(bp, IDR, ~0UL);
550 break;
551 }
552
553 if (status & MACB_RX_INT_FLAGS) {
Joshua Hokeb3363692010-10-25 01:44:22 +0000554 /*
555 * There's no point taking any more interrupts
556 * until we have processed the buffers. The
557 * scheduling call may fail if the poll routine
558 * is already scheduled, so disable interrupts
559 * now.
560 */
561 macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
562
Ben Hutchings288379f2009-01-19 16:43:59 -0800563 if (napi_schedule_prep(&bp->napi)) {
frederic RODO6c36a702007-07-12 19:07:24 +0200564 dev_dbg(&bp->pdev->dev,
565 "scheduling RX softirq\n");
Ben Hutchings288379f2009-01-19 16:43:59 -0800566 __napi_schedule(&bp->napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100567 }
568 }
569
Erik Walingee33c582009-04-15 23:32:10 +0000570 if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND) |
571 MACB_BIT(ISR_RLE)))
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100572 macb_tx(bp);
573
574 /*
575 * Link change detection isn't possible with RMII, so we'll
576 * add that if/when we get our hands on a full-blown MII PHY.
577 */
578
579 if (status & MACB_BIT(HRESP)) {
580 /*
581 * TODO: Reset the hardware, and maybe move the printk
582 * to a lower-priority context as well (work queue?)
583 */
584 printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n",
585 dev->name);
586 }
587
588 status = macb_readl(bp, ISR);
589 }
590
591 spin_unlock(&bp->lock);
592
593 return IRQ_HANDLED;
594}
595
Thomas Petazzoni6e8cf5c2009-05-04 11:08:41 -0700596#ifdef CONFIG_NET_POLL_CONTROLLER
597/*
598 * Polling receive - used by netconsole and other diagnostic tools
599 * to allow network i/o with interrupts disabled.
600 */
601static void macb_poll_controller(struct net_device *dev)
602{
603 unsigned long flags;
604
605 local_irq_save(flags);
606 macb_interrupt(dev->irq, dev);
607 local_irq_restore(flags);
608}
609#endif
610
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100611static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
612{
613 struct macb *bp = netdev_priv(dev);
614 dma_addr_t mapping;
615 unsigned int len, entry;
616 u32 ctrl;
Dongdong Deng48719532009-08-23 19:49:07 -0700617 unsigned long flags;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100618
619#ifdef DEBUG
620 int i;
621 dev_dbg(&bp->pdev->dev,
622 "start_xmit: len %u head %p data %p tail %p end %p\n",
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700623 skb->len, skb->head, skb->data,
Arnaldo Carvalho de Melo4305b542007-04-19 20:43:29 -0700624 skb_tail_pointer(skb), skb_end_pointer(skb));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100625 dev_dbg(&bp->pdev->dev,
626 "data:");
627 for (i = 0; i < 16; i++)
628 printk(" %02x", (unsigned int)skb->data[i]);
629 printk("\n");
630#endif
631
632 len = skb->len;
Dongdong Deng48719532009-08-23 19:49:07 -0700633 spin_lock_irqsave(&bp->lock, flags);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100634
635 /* This is a hard error, log it. */
636 if (TX_BUFFS_AVAIL(bp) < 1) {
637 netif_stop_queue(dev);
Dongdong Deng48719532009-08-23 19:49:07 -0700638 spin_unlock_irqrestore(&bp->lock, flags);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100639 dev_err(&bp->pdev->dev,
640 "BUG! Tx Ring full when queue awake!\n");
641 dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n",
642 bp->tx_head, bp->tx_tail);
Patrick McHardy5b548142009-06-12 06:22:29 +0000643 return NETDEV_TX_BUSY;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100644 }
645
646 entry = bp->tx_head;
647 dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry);
648 mapping = dma_map_single(&bp->pdev->dev, skb->data,
649 len, DMA_TO_DEVICE);
650 bp->tx_skb[entry].skb = skb;
651 bp->tx_skb[entry].mapping = mapping;
652 dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n",
653 skb->data, (unsigned long)mapping);
654
655 ctrl = MACB_BF(TX_FRMLEN, len);
656 ctrl |= MACB_BIT(TX_LAST);
657 if (entry == (TX_RING_SIZE - 1))
658 ctrl |= MACB_BIT(TX_WRAP);
659
660 bp->tx_ring[entry].addr = mapping;
661 bp->tx_ring[entry].ctrl = ctrl;
662 wmb();
663
664 entry = NEXT_TX(entry);
665 bp->tx_head = entry;
666
667 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
668
669 if (TX_BUFFS_AVAIL(bp) < 1)
670 netif_stop_queue(dev);
671
Dongdong Deng48719532009-08-23 19:49:07 -0700672 spin_unlock_irqrestore(&bp->lock, flags);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100673
Patrick McHardy6ed10652009-06-23 06:03:08 +0000674 return NETDEV_TX_OK;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100675}
676
677static void macb_free_consistent(struct macb *bp)
678{
679 if (bp->tx_skb) {
680 kfree(bp->tx_skb);
681 bp->tx_skb = NULL;
682 }
683 if (bp->rx_ring) {
684 dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES,
685 bp->rx_ring, bp->rx_ring_dma);
686 bp->rx_ring = NULL;
687 }
688 if (bp->tx_ring) {
689 dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES,
690 bp->tx_ring, bp->tx_ring_dma);
691 bp->tx_ring = NULL;
692 }
693 if (bp->rx_buffers) {
694 dma_free_coherent(&bp->pdev->dev,
695 RX_RING_SIZE * RX_BUFFER_SIZE,
696 bp->rx_buffers, bp->rx_buffers_dma);
697 bp->rx_buffers = NULL;
698 }
699}
700
701static int macb_alloc_consistent(struct macb *bp)
702{
703 int size;
704
705 size = TX_RING_SIZE * sizeof(struct ring_info);
706 bp->tx_skb = kmalloc(size, GFP_KERNEL);
707 if (!bp->tx_skb)
708 goto out_err;
709
710 size = RX_RING_BYTES;
711 bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
712 &bp->rx_ring_dma, GFP_KERNEL);
713 if (!bp->rx_ring)
714 goto out_err;
715 dev_dbg(&bp->pdev->dev,
716 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
717 size, (unsigned long)bp->rx_ring_dma, bp->rx_ring);
718
719 size = TX_RING_BYTES;
720 bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
721 &bp->tx_ring_dma, GFP_KERNEL);
722 if (!bp->tx_ring)
723 goto out_err;
724 dev_dbg(&bp->pdev->dev,
725 "Allocated TX ring of %d bytes at %08lx (mapped %p)\n",
726 size, (unsigned long)bp->tx_ring_dma, bp->tx_ring);
727
728 size = RX_RING_SIZE * RX_BUFFER_SIZE;
729 bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
730 &bp->rx_buffers_dma, GFP_KERNEL);
731 if (!bp->rx_buffers)
732 goto out_err;
733 dev_dbg(&bp->pdev->dev,
734 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
735 size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers);
736
737 return 0;
738
739out_err:
740 macb_free_consistent(bp);
741 return -ENOMEM;
742}
743
744static void macb_init_rings(struct macb *bp)
745{
746 int i;
747 dma_addr_t addr;
748
749 addr = bp->rx_buffers_dma;
750 for (i = 0; i < RX_RING_SIZE; i++) {
751 bp->rx_ring[i].addr = addr;
752 bp->rx_ring[i].ctrl = 0;
753 addr += RX_BUFFER_SIZE;
754 }
755 bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP);
756
757 for (i = 0; i < TX_RING_SIZE; i++) {
758 bp->tx_ring[i].addr = 0;
759 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
760 }
761 bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
762
763 bp->rx_tail = bp->tx_head = bp->tx_tail = 0;
764}
765
766static void macb_reset_hw(struct macb *bp)
767{
768 /* Make sure we have the write buffer for ourselves */
769 wmb();
770
771 /*
772 * Disable RX and TX (XXX: Should we halt the transmission
773 * more gracefully?)
774 */
775 macb_writel(bp, NCR, 0);
776
777 /* Clear the stats registers (XXX: Update stats first?) */
778 macb_writel(bp, NCR, MACB_BIT(CLRSTAT));
779
780 /* Clear all status flags */
781 macb_writel(bp, TSR, ~0UL);
782 macb_writel(bp, RSR, ~0UL);
783
784 /* Disable all interrupts */
785 macb_writel(bp, IDR, ~0UL);
786 macb_readl(bp, ISR);
787}
788
789static void macb_init_hw(struct macb *bp)
790{
791 u32 config;
792
793 macb_reset_hw(bp);
794 __macb_set_hwaddr(bp);
795
796 config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
797 config |= MACB_BIT(PAE); /* PAuse Enable */
798 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
Peter Korsgaard8dd4bd02010-04-07 21:53:41 -0700799 config |= MACB_BIT(BIG); /* Receive oversized frames */
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100800 if (bp->dev->flags & IFF_PROMISC)
801 config |= MACB_BIT(CAF); /* Copy All Frames */
802 if (!(bp->dev->flags & IFF_BROADCAST))
803 config |= MACB_BIT(NBC); /* No BroadCast */
804 macb_writel(bp, NCFGR, config);
805
806 /* Initialize TX and RX buffers */
807 macb_writel(bp, RBQP, bp->rx_ring_dma);
808 macb_writel(bp, TBQP, bp->tx_ring_dma);
809
810 /* Enable TX and RX */
frederic RODO6c36a702007-07-12 19:07:24 +0200811 macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100812
813 /* Enable interrupts */
814 macb_writel(bp, IER, (MACB_BIT(RCOMP)
815 | MACB_BIT(RXUBR)
816 | MACB_BIT(ISR_TUND)
817 | MACB_BIT(ISR_RLE)
818 | MACB_BIT(TXERR)
819 | MACB_BIT(TCOMP)
820 | MACB_BIT(ISR_ROVR)
821 | MACB_BIT(HRESP)));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100822
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100823}
824
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200825/*
826 * The hash address register is 64 bits long and takes up two
827 * locations in the memory map. The least significant bits are stored
828 * in EMAC_HSL and the most significant bits in EMAC_HSH.
829 *
830 * The unicast hash enable and the multicast hash enable bits in the
831 * network configuration register enable the reception of hash matched
832 * frames. The destination address is reduced to a 6 bit index into
833 * the 64 bit hash register using the following hash function. The
834 * hash function is an exclusive or of every sixth bit of the
835 * destination address.
836 *
837 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
838 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
839 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
840 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
841 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
842 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
843 *
844 * da[0] represents the least significant bit of the first byte
845 * received, that is, the multicast/unicast indicator, and da[47]
846 * represents the most significant bit of the last byte received. If
847 * the hash index, hi[n], points to a bit that is set in the hash
848 * register then the frame will be matched according to whether the
849 * frame is multicast or unicast. A multicast match will be signalled
850 * if the multicast hash enable bit is set, da[0] is 1 and the hash
851 * index points to a bit set in the hash register. A unicast match
852 * will be signalled if the unicast hash enable bit is set, da[0] is 0
853 * and the hash index points to a bit set in the hash register. To
854 * receive all multicast frames, the hash register should be set with
855 * all ones and the multicast hash enable bit should be set in the
856 * network configuration register.
857 */
858
859static inline int hash_bit_value(int bitnr, __u8 *addr)
860{
861 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
862 return 1;
863 return 0;
864}
865
866/*
867 * Return the hash index value for the specified address.
868 */
869static int hash_get_index(__u8 *addr)
870{
871 int i, j, bitval;
872 int hash_index = 0;
873
874 for (j = 0; j < 6; j++) {
875 for (i = 0, bitval = 0; i < 8; i++)
876 bitval ^= hash_bit_value(i*6 + j, addr);
877
878 hash_index |= (bitval << j);
879 }
880
881 return hash_index;
882}
883
884/*
885 * Add multicast addresses to the internal multicast-hash table.
886 */
887static void macb_sethashtable(struct net_device *dev)
888{
Jiri Pirko22bedad32010-04-01 21:22:57 +0000889 struct netdev_hw_addr *ha;
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200890 unsigned long mc_filter[2];
Jiri Pirkof9dcbcc2010-02-23 09:19:49 +0000891 unsigned int bitnr;
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200892 struct macb *bp = netdev_priv(dev);
893
894 mc_filter[0] = mc_filter[1] = 0;
895
Jiri Pirko22bedad32010-04-01 21:22:57 +0000896 netdev_for_each_mc_addr(ha, dev) {
897 bitnr = hash_get_index(ha->addr);
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200898 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
899 }
900
901 macb_writel(bp, HRB, mc_filter[0]);
902 macb_writel(bp, HRT, mc_filter[1]);
903}
904
905/*
906 * Enable/Disable promiscuous and multicast modes.
907 */
908static void macb_set_rx_mode(struct net_device *dev)
909{
910 unsigned long cfg;
911 struct macb *bp = netdev_priv(dev);
912
913 cfg = macb_readl(bp, NCFGR);
914
915 if (dev->flags & IFF_PROMISC)
916 /* Enable promiscuous mode */
917 cfg |= MACB_BIT(CAF);
918 else if (dev->flags & (~IFF_PROMISC))
919 /* Disable promiscuous mode */
920 cfg &= ~MACB_BIT(CAF);
921
922 if (dev->flags & IFF_ALLMULTI) {
923 /* Enable all multicast mode */
924 macb_writel(bp, HRB, -1);
925 macb_writel(bp, HRT, -1);
926 cfg |= MACB_BIT(NCFGR_MTI);
Jiri Pirko4cd24ea2010-02-08 04:30:35 +0000927 } else if (!netdev_mc_empty(dev)) {
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200928 /* Enable specific multicasts */
929 macb_sethashtable(dev);
930 cfg |= MACB_BIT(NCFGR_MTI);
931 } else if (dev->flags & (~IFF_ALLMULTI)) {
932 /* Disable all multicast mode */
933 macb_writel(bp, HRB, 0);
934 macb_writel(bp, HRT, 0);
935 cfg &= ~MACB_BIT(NCFGR_MTI);
936 }
937
938 macb_writel(bp, NCFGR, cfg);
939}
940
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100941static int macb_open(struct net_device *dev)
942{
943 struct macb *bp = netdev_priv(dev);
944 int err;
945
946 dev_dbg(&bp->pdev->dev, "open\n");
947
frederic RODO6c36a702007-07-12 19:07:24 +0200948 /* if the phy is not yet register, retry later*/
949 if (!bp->phy_dev)
950 return -EAGAIN;
951
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100952 if (!is_valid_ether_addr(dev->dev_addr))
953 return -EADDRNOTAVAIL;
954
955 err = macb_alloc_consistent(bp);
956 if (err) {
957 printk(KERN_ERR
958 "%s: Unable to allocate DMA memory (error %d)\n",
959 dev->name, err);
960 return err;
961 }
962
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700963 napi_enable(&bp->napi);
964
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100965 macb_init_rings(bp);
966 macb_init_hw(bp);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100967
frederic RODO6c36a702007-07-12 19:07:24 +0200968 /* schedule a link state check */
969 phy_start(bp->phy_dev);
970
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100971 netif_start_queue(dev);
972
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100973 return 0;
974}
975
976static int macb_close(struct net_device *dev)
977{
978 struct macb *bp = netdev_priv(dev);
979 unsigned long flags;
980
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100981 netif_stop_queue(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700982 napi_disable(&bp->napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100983
frederic RODO6c36a702007-07-12 19:07:24 +0200984 if (bp->phy_dev)
985 phy_stop(bp->phy_dev);
986
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100987 spin_lock_irqsave(&bp->lock, flags);
988 macb_reset_hw(bp);
989 netif_carrier_off(dev);
990 spin_unlock_irqrestore(&bp->lock, flags);
991
992 macb_free_consistent(bp);
993
994 return 0;
995}
996
997static struct net_device_stats *macb_get_stats(struct net_device *dev)
998{
999 struct macb *bp = netdev_priv(dev);
1000 struct net_device_stats *nstat = &bp->stats;
1001 struct macb_stats *hwstat = &bp->hw_stats;
1002
frederic RODO6c36a702007-07-12 19:07:24 +02001003 /* read stats from hardware */
1004 macb_update_stats(bp);
1005
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001006 /* Convert HW stats into netdevice stats */
1007 nstat->rx_errors = (hwstat->rx_fcs_errors +
1008 hwstat->rx_align_errors +
1009 hwstat->rx_resource_errors +
1010 hwstat->rx_overruns +
1011 hwstat->rx_oversize_pkts +
1012 hwstat->rx_jabbers +
1013 hwstat->rx_undersize_pkts +
1014 hwstat->sqe_test_errors +
1015 hwstat->rx_length_mismatch);
1016 nstat->tx_errors = (hwstat->tx_late_cols +
1017 hwstat->tx_excessive_cols +
1018 hwstat->tx_underruns +
1019 hwstat->tx_carrier_errors);
1020 nstat->collisions = (hwstat->tx_single_cols +
1021 hwstat->tx_multiple_cols +
1022 hwstat->tx_excessive_cols);
1023 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1024 hwstat->rx_jabbers +
1025 hwstat->rx_undersize_pkts +
1026 hwstat->rx_length_mismatch);
1027 nstat->rx_over_errors = hwstat->rx_resource_errors;
1028 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
1029 nstat->rx_frame_errors = hwstat->rx_align_errors;
1030 nstat->rx_fifo_errors = hwstat->rx_overruns;
1031 /* XXX: What does "missed" mean? */
1032 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
1033 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
1034 nstat->tx_fifo_errors = hwstat->tx_underruns;
1035 /* Don't know about heartbeat or window errors... */
1036
1037 return nstat;
1038}
1039
1040static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1041{
1042 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001043 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001044
frederic RODO6c36a702007-07-12 19:07:24 +02001045 if (!phydev)
1046 return -ENODEV;
1047
1048 return phy_ethtool_gset(phydev, cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001049}
1050
1051static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1052{
1053 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001054 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001055
frederic RODO6c36a702007-07-12 19:07:24 +02001056 if (!phydev)
1057 return -ENODEV;
1058
1059 return phy_ethtool_sset(phydev, cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001060}
1061
frederic RODO6c36a702007-07-12 19:07:24 +02001062static void macb_get_drvinfo(struct net_device *dev,
1063 struct ethtool_drvinfo *info)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001064{
1065 struct macb *bp = netdev_priv(dev);
1066
1067 strcpy(info->driver, bp->pdev->dev.driver->name);
1068 strcpy(info->version, "$Revision: 1.14 $");
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08001069 strcpy(info->bus_info, dev_name(&bp->pdev->dev));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001070}
1071
Stephen Hemminger0fc0b732009-09-02 01:03:33 -07001072static const struct ethtool_ops macb_ethtool_ops = {
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001073 .get_settings = macb_get_settings,
1074 .set_settings = macb_set_settings,
1075 .get_drvinfo = macb_get_drvinfo,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001076 .get_link = ethtool_op_get_link,
1077};
1078
1079static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1080{
1081 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001082 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001083
1084 if (!netif_running(dev))
1085 return -EINVAL;
1086
frederic RODO6c36a702007-07-12 19:07:24 +02001087 if (!phydev)
1088 return -ENODEV;
1089
Richard Cochran28b04112010-07-17 08:48:55 +00001090 return phy_mii_ioctl(phydev, rq, cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001091}
1092
Alexander Beregalov5f1fa992009-04-11 07:42:26 +00001093static const struct net_device_ops macb_netdev_ops = {
1094 .ndo_open = macb_open,
1095 .ndo_stop = macb_close,
1096 .ndo_start_xmit = macb_start_xmit,
1097 .ndo_set_multicast_list = macb_set_rx_mode,
1098 .ndo_get_stats = macb_get_stats,
1099 .ndo_do_ioctl = macb_ioctl,
1100 .ndo_validate_addr = eth_validate_addr,
1101 .ndo_change_mtu = eth_change_mtu,
1102 .ndo_set_mac_address = eth_mac_addr,
Thomas Petazzoni6e8cf5c2009-05-04 11:08:41 -07001103#ifdef CONFIG_NET_POLL_CONTROLLER
1104 .ndo_poll_controller = macb_poll_controller,
1105#endif
Alexander Beregalov5f1fa992009-04-11 07:42:26 +00001106};
1107
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001108static int __init macb_probe(struct platform_device *pdev)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001109{
1110 struct eth_platform_data *pdata;
1111 struct resource *regs;
1112 struct net_device *dev;
1113 struct macb *bp;
frederic RODO6c36a702007-07-12 19:07:24 +02001114 struct phy_device *phydev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001115 unsigned long pclk_hz;
1116 u32 config;
1117 int err = -ENXIO;
1118
1119 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1120 if (!regs) {
1121 dev_err(&pdev->dev, "no mmio resource defined\n");
1122 goto err_out;
1123 }
1124
1125 err = -ENOMEM;
1126 dev = alloc_etherdev(sizeof(*bp));
1127 if (!dev) {
1128 dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
1129 goto err_out;
1130 }
1131
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001132 SET_NETDEV_DEV(dev, &pdev->dev);
1133
1134 /* TODO: Actually, we have some interesting features... */
1135 dev->features |= 0;
1136
1137 bp = netdev_priv(dev);
1138 bp->pdev = pdev;
1139 bp->dev = dev;
1140
1141 spin_lock_init(&bp->lock);
1142
Andrew Victor0cc86742007-02-07 16:40:44 +01001143#if defined(CONFIG_ARCH_AT91)
1144 bp->pclk = clk_get(&pdev->dev, "macb_clk");
1145 if (IS_ERR(bp->pclk)) {
1146 dev_err(&pdev->dev, "failed to get macb_clk\n");
1147 goto err_out_free_dev;
1148 }
1149 clk_enable(bp->pclk);
1150#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001151 bp->pclk = clk_get(&pdev->dev, "pclk");
1152 if (IS_ERR(bp->pclk)) {
1153 dev_err(&pdev->dev, "failed to get pclk\n");
1154 goto err_out_free_dev;
1155 }
1156 bp->hclk = clk_get(&pdev->dev, "hclk");
1157 if (IS_ERR(bp->hclk)) {
1158 dev_err(&pdev->dev, "failed to get hclk\n");
1159 goto err_out_put_pclk;
1160 }
1161
1162 clk_enable(bp->pclk);
1163 clk_enable(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001164#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001165
1166 bp->regs = ioremap(regs->start, regs->end - regs->start + 1);
1167 if (!bp->regs) {
1168 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
1169 err = -ENOMEM;
1170 goto err_out_disable_clocks;
1171 }
1172
1173 dev->irq = platform_get_irq(pdev, 0);
Thomas Gleixner38515e92007-02-14 00:33:16 -08001174 err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001175 dev->name, dev);
1176 if (err) {
1177 printk(KERN_ERR
1178 "%s: Unable to request IRQ %d (error %d)\n",
1179 dev->name, dev->irq, err);
1180 goto err_out_iounmap;
1181 }
1182
Alexander Beregalov5f1fa992009-04-11 07:42:26 +00001183 dev->netdev_ops = &macb_netdev_ops;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001184 netif_napi_add(dev, &bp->napi, macb_poll, 64);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001185 dev->ethtool_ops = &macb_ethtool_ops;
1186
1187 dev->base_addr = regs->start;
1188
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001189 /* Set MII management clock divider */
1190 pclk_hz = clk_get_rate(bp->pclk);
1191 if (pclk_hz <= 20000000)
1192 config = MACB_BF(CLK, MACB_CLK_DIV8);
1193 else if (pclk_hz <= 40000000)
1194 config = MACB_BF(CLK, MACB_CLK_DIV16);
1195 else if (pclk_hz <= 80000000)
1196 config = MACB_BF(CLK, MACB_CLK_DIV32);
1197 else
1198 config = MACB_BF(CLK, MACB_CLK_DIV64);
1199 macb_writel(bp, NCFGR, config);
1200
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001201 macb_get_hwaddr(bp);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001202 pdata = pdev->dev.platform_data;
frederic RODO6c36a702007-07-12 19:07:24 +02001203
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001204 if (pdata && pdata->is_rmii)
Andrew Victor0cc86742007-02-07 16:40:44 +01001205#if defined(CONFIG_ARCH_AT91)
1206 macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
1207#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001208 macb_writel(bp, USRIO, 0);
Andrew Victor0cc86742007-02-07 16:40:44 +01001209#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001210 else
Andrew Victor0cc86742007-02-07 16:40:44 +01001211#if defined(CONFIG_ARCH_AT91)
1212 macb_writel(bp, USRIO, MACB_BIT(CLKEN));
1213#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001214 macb_writel(bp, USRIO, MACB_BIT(MII));
Andrew Victor0cc86742007-02-07 16:40:44 +01001215#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001216
1217 bp->tx_pending = DEF_TX_RING_PENDING;
1218
1219 err = register_netdev(dev);
1220 if (err) {
1221 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
1222 goto err_out_free_irq;
1223 }
1224
frederic RODO6c36a702007-07-12 19:07:24 +02001225 if (macb_mii_init(bp) != 0) {
1226 goto err_out_unregister_netdev;
1227 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001228
frederic RODO6c36a702007-07-12 19:07:24 +02001229 platform_set_drvdata(pdev, dev);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001230
Johannes Berge1749612008-10-27 15:59:26 -07001231 printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d (%pM)\n",
1232 dev->name, dev->base_addr, dev->irq, dev->dev_addr);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001233
frederic RODO6c36a702007-07-12 19:07:24 +02001234 phydev = bp->phy_dev;
1235 printk(KERN_INFO "%s: attached PHY driver [%s] "
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08001236 "(mii_bus:phy_addr=%s, irq=%d)\n", dev->name,
1237 phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
frederic RODO6c36a702007-07-12 19:07:24 +02001238
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001239 return 0;
1240
frederic RODO6c36a702007-07-12 19:07:24 +02001241err_out_unregister_netdev:
1242 unregister_netdev(dev);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001243err_out_free_irq:
1244 free_irq(dev->irq, dev);
1245err_out_iounmap:
1246 iounmap(bp->regs);
1247err_out_disable_clocks:
Andrew Victor0cc86742007-02-07 16:40:44 +01001248#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001249 clk_disable(bp->hclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001250 clk_put(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001251#endif
1252 clk_disable(bp->pclk);
frederic RODO6c36a702007-07-12 19:07:24 +02001253#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001254err_out_put_pclk:
frederic RODO6c36a702007-07-12 19:07:24 +02001255#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001256 clk_put(bp->pclk);
1257err_out_free_dev:
1258 free_netdev(dev);
1259err_out:
1260 platform_set_drvdata(pdev, NULL);
1261 return err;
1262}
1263
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001264static int __exit macb_remove(struct platform_device *pdev)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001265{
1266 struct net_device *dev;
1267 struct macb *bp;
1268
1269 dev = platform_get_drvdata(pdev);
1270
1271 if (dev) {
1272 bp = netdev_priv(dev);
Atsushi Nemoto84b79012008-04-10 23:30:07 +09001273 if (bp->phy_dev)
1274 phy_disconnect(bp->phy_dev);
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07001275 mdiobus_unregister(bp->mii_bus);
1276 kfree(bp->mii_bus->irq);
1277 mdiobus_free(bp->mii_bus);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001278 unregister_netdev(dev);
1279 free_irq(dev->irq, dev);
1280 iounmap(bp->regs);
Andrew Victor0cc86742007-02-07 16:40:44 +01001281#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001282 clk_disable(bp->hclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001283 clk_put(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001284#endif
1285 clk_disable(bp->pclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001286 clk_put(bp->pclk);
1287 free_netdev(dev);
1288 platform_set_drvdata(pdev, NULL);
1289 }
1290
1291 return 0;
1292}
1293
Haavard Skinnemoenc1f598f2008-03-04 13:39:29 +01001294#ifdef CONFIG_PM
1295static int macb_suspend(struct platform_device *pdev, pm_message_t state)
1296{
1297 struct net_device *netdev = platform_get_drvdata(pdev);
1298 struct macb *bp = netdev_priv(netdev);
1299
1300 netif_device_detach(netdev);
1301
1302#ifndef CONFIG_ARCH_AT91
1303 clk_disable(bp->hclk);
1304#endif
1305 clk_disable(bp->pclk);
1306
1307 return 0;
1308}
1309
1310static int macb_resume(struct platform_device *pdev)
1311{
1312 struct net_device *netdev = platform_get_drvdata(pdev);
1313 struct macb *bp = netdev_priv(netdev);
1314
1315 clk_enable(bp->pclk);
1316#ifndef CONFIG_ARCH_AT91
1317 clk_enable(bp->hclk);
1318#endif
1319
1320 netif_device_attach(netdev);
1321
1322 return 0;
1323}
1324#else
1325#define macb_suspend NULL
1326#define macb_resume NULL
1327#endif
1328
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001329static struct platform_driver macb_driver = {
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001330 .remove = __exit_p(macb_remove),
Haavard Skinnemoenc1f598f2008-03-04 13:39:29 +01001331 .suspend = macb_suspend,
1332 .resume = macb_resume,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001333 .driver = {
1334 .name = "macb",
Kay Sievers72abb462008-04-18 13:50:44 -07001335 .owner = THIS_MODULE,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001336 },
1337};
1338
1339static int __init macb_init(void)
1340{
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001341 return platform_driver_probe(&macb_driver, macb_probe);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001342}
1343
1344static void __exit macb_exit(void)
1345{
1346 platform_driver_unregister(&macb_driver);
1347}
1348
1349module_init(macb_init);
1350module_exit(macb_exit);
1351
1352MODULE_LICENSE("GPL");
1353MODULE_DESCRIPTION("Atmel MACB Ethernet driver");
1354MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
Kay Sievers72abb462008-04-18 13:50:44 -07001355MODULE_ALIAS("platform:macb");