blob: 01f7a31bac764134f623352a3894456c7192b205 [file] [log] [blame]
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);
192 struct phy_device *phydev = NULL;
193 struct eth_platform_data *pdata;
194 int phy_addr;
195
196 /* find the first phy */
197 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700198 if (bp->mii_bus->phy_map[phy_addr]) {
199 phydev = bp->mii_bus->phy_map[phy_addr];
frederic RODO6c36a702007-07-12 19:07:24 +0200200 break;
201 }
202 }
203
204 if (!phydev) {
205 printk (KERN_ERR "%s: no PHY found\n", dev->name);
206 return -1;
207 }
208
209 pdata = bp->pdev->dev.platform_data;
210 /* TODO : add pin_irq */
211
212 /* attach the mac to the phy */
213 if (pdata && pdata->is_rmii) {
214 phydev = phy_connect(dev, phydev->dev.bus_id,
215 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_RMII);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100216 } else {
frederic RODO6c36a702007-07-12 19:07:24 +0200217 phydev = phy_connect(dev, phydev->dev.bus_id,
218 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_MII);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100219 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100220
frederic RODO6c36a702007-07-12 19:07:24 +0200221 if (IS_ERR(phydev)) {
222 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
223 return PTR_ERR(phydev);
224 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100225
frederic RODO6c36a702007-07-12 19:07:24 +0200226 /* mask with MAC supported features */
227 phydev->supported &= PHY_BASIC_FEATURES;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100228
frederic RODO6c36a702007-07-12 19:07:24 +0200229 phydev->advertising = phydev->supported;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100230
frederic RODO6c36a702007-07-12 19:07:24 +0200231 bp->link = 0;
232 bp->speed = 0;
233 bp->duplex = -1;
234 bp->phy_dev = phydev;
235
236 return 0;
237}
238
239static int macb_mii_init(struct macb *bp)
240{
241 struct eth_platform_data *pdata;
242 int err = -ENXIO, i;
243
244 /* Enable managment port */
245 macb_writel(bp, NCR, MACB_BIT(MPE));
246
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700247 bp->mii_bus = mdiobus_alloc();
248 if (bp->mii_bus == NULL) {
frederic RODO6c36a702007-07-12 19:07:24 +0200249 err = -ENOMEM;
250 goto err_out;
251 }
252
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700253 bp->mii_bus->name = "MACB_mii_bus";
254 bp->mii_bus->read = &macb_mdio_read;
255 bp->mii_bus->write = &macb_mdio_write;
256 bp->mii_bus->reset = &macb_mdio_reset;
257 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
258 bp->mii_bus->priv = bp;
259 bp->mii_bus->parent = &bp->dev->dev;
260 pdata = bp->pdev->dev.platform_data;
261
262 if (pdata)
263 bp->mii_bus->phy_mask = pdata->phy_mask;
264
265 bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
266 if (!bp->mii_bus->irq) {
267 err = -ENOMEM;
268 goto err_out_free_mdiobus;
269 }
270
frederic RODO6c36a702007-07-12 19:07:24 +0200271 for (i = 0; i < PHY_MAX_ADDR; i++)
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700272 bp->mii_bus->irq[i] = PHY_POLL;
frederic RODO6c36a702007-07-12 19:07:24 +0200273
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700274 platform_set_drvdata(bp->dev, bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200275
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700276 if (mdiobus_register(bp->mii_bus))
frederic RODO6c36a702007-07-12 19:07:24 +0200277 goto err_out_free_mdio_irq;
278
279 if (macb_mii_probe(bp->dev) != 0) {
280 goto err_out_unregister_bus;
281 }
282
283 return 0;
284
285err_out_unregister_bus:
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700286 mdiobus_unregister(bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200287err_out_free_mdio_irq:
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700288 kfree(bp->mii_bus->irq);
289err_out_free_mdiobus:
290 mdiobus_free(bp->mii_bus);
frederic RODO6c36a702007-07-12 19:07:24 +0200291err_out:
292 return err;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100293}
294
295static void macb_update_stats(struct macb *bp)
296{
297 u32 __iomem *reg = bp->regs + MACB_PFR;
298 u32 *p = &bp->hw_stats.rx_pause_frames;
299 u32 *end = &bp->hw_stats.tx_pause_frames + 1;
300
301 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
302
303 for(; p < end; p++, reg++)
Haavard Skinnemoen0f0d84e2006-12-08 14:38:30 +0100304 *p += __raw_readl(reg);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100305}
306
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100307static void macb_tx(struct macb *bp)
308{
309 unsigned int tail;
310 unsigned int head;
311 u32 status;
312
313 status = macb_readl(bp, TSR);
314 macb_writel(bp, TSR, status);
315
316 dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n",
317 (unsigned long)status);
318
319 if (status & MACB_BIT(UND)) {
Gregory CLEMENTbdcba1512007-12-19 18:23:44 +0100320 int i;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100321 printk(KERN_ERR "%s: TX underrun, resetting buffers\n",
Gregory CLEMENTbdcba1512007-12-19 18:23:44 +0100322 bp->dev->name);
323
324 head = bp->tx_head;
325
326 /*Mark all the buffer as used to avoid sending a lost buffer*/
327 for (i = 0; i < TX_RING_SIZE; i++)
328 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
329
330 /* free transmit buffer in upper layer*/
331 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
332 struct ring_info *rp = &bp->tx_skb[tail];
333 struct sk_buff *skb = rp->skb;
334
335 BUG_ON(skb == NULL);
336
337 rmb();
338
339 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
340 DMA_TO_DEVICE);
341 rp->skb = NULL;
342 dev_kfree_skb_irq(skb);
343 }
344
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100345 bp->tx_head = bp->tx_tail = 0;
346 }
347
348 if (!(status & MACB_BIT(COMP)))
349 /*
350 * This may happen when a buffer becomes complete
351 * between reading the ISR and scanning the
352 * descriptors. Nothing to worry about.
353 */
354 return;
355
356 head = bp->tx_head;
357 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
358 struct ring_info *rp = &bp->tx_skb[tail];
359 struct sk_buff *skb = rp->skb;
360 u32 bufstat;
361
362 BUG_ON(skb == NULL);
363
364 rmb();
365 bufstat = bp->tx_ring[tail].ctrl;
366
367 if (!(bufstat & MACB_BIT(TX_USED)))
368 break;
369
370 dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n",
371 tail, skb->data);
372 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
373 DMA_TO_DEVICE);
374 bp->stats.tx_packets++;
375 bp->stats.tx_bytes += skb->len;
376 rp->skb = NULL;
377 dev_kfree_skb_irq(skb);
378 }
379
380 bp->tx_tail = tail;
381 if (netif_queue_stopped(bp->dev) &&
382 TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH)
383 netif_wake_queue(bp->dev);
384}
385
386static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
387 unsigned int last_frag)
388{
389 unsigned int len;
390 unsigned int frag;
391 unsigned int offset = 0;
392 struct sk_buff *skb;
393
394 len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl);
395
396 dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n",
397 first_frag, last_frag, len);
398
399 skb = dev_alloc_skb(len + RX_OFFSET);
400 if (!skb) {
401 bp->stats.rx_dropped++;
402 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
403 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
404 if (frag == last_frag)
405 break;
406 }
407 wmb();
408 return 1;
409 }
410
411 skb_reserve(skb, RX_OFFSET);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100412 skb->ip_summed = CHECKSUM_NONE;
413 skb_put(skb, len);
414
415 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
416 unsigned int frag_len = RX_BUFFER_SIZE;
417
418 if (offset + frag_len > len) {
419 BUG_ON(frag != last_frag);
420 frag_len = len - offset;
421 }
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -0300422 skb_copy_to_linear_data_offset(skb, offset,
423 (bp->rx_buffers +
424 (RX_BUFFER_SIZE * frag)),
425 frag_len);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100426 offset += RX_BUFFER_SIZE;
427 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
428 wmb();
429
430 if (frag == last_frag)
431 break;
432 }
433
434 skb->protocol = eth_type_trans(skb, bp->dev);
435
436 bp->stats.rx_packets++;
437 bp->stats.rx_bytes += len;
438 bp->dev->last_rx = jiffies;
439 dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n",
440 skb->len, skb->csum);
441 netif_receive_skb(skb);
442
443 return 0;
444}
445
446/* Mark DMA descriptors from begin up to and not including end as unused */
447static void discard_partial_frame(struct macb *bp, unsigned int begin,
448 unsigned int end)
449{
450 unsigned int frag;
451
452 for (frag = begin; frag != end; frag = NEXT_RX(frag))
453 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
454 wmb();
455
456 /*
457 * When this happens, the hardware stats registers for
458 * whatever caused this is updated, so we don't have to record
459 * anything.
460 */
461}
462
463static int macb_rx(struct macb *bp, int budget)
464{
465 int received = 0;
466 unsigned int tail = bp->rx_tail;
467 int first_frag = -1;
468
469 for (; budget > 0; tail = NEXT_RX(tail)) {
470 u32 addr, ctrl;
471
472 rmb();
473 addr = bp->rx_ring[tail].addr;
474 ctrl = bp->rx_ring[tail].ctrl;
475
476 if (!(addr & MACB_BIT(RX_USED)))
477 break;
478
479 if (ctrl & MACB_BIT(RX_SOF)) {
480 if (first_frag != -1)
481 discard_partial_frame(bp, first_frag, tail);
482 first_frag = tail;
483 }
484
485 if (ctrl & MACB_BIT(RX_EOF)) {
486 int dropped;
487 BUG_ON(first_frag == -1);
488
489 dropped = macb_rx_frame(bp, first_frag, tail);
490 first_frag = -1;
491 if (!dropped) {
492 received++;
493 budget--;
494 }
495 }
496 }
497
498 if (first_frag != -1)
499 bp->rx_tail = first_frag;
500 else
501 bp->rx_tail = tail;
502
503 return received;
504}
505
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700506static int macb_poll(struct napi_struct *napi, int budget)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100507{
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700508 struct macb *bp = container_of(napi, struct macb, napi);
509 struct net_device *dev = bp->dev;
510 int work_done;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100511 u32 status;
512
513 status = macb_readl(bp, RSR);
514 macb_writel(bp, RSR, status);
515
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700516 work_done = 0;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100517 if (!status) {
518 /*
519 * This may happen if an interrupt was pending before
520 * this function was called last time, and no packets
521 * have been received since.
522 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700523 netif_rx_complete(dev, napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100524 goto out;
525 }
526
527 dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700528 (unsigned long)status, budget);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100529
530 if (!(status & MACB_BIT(REC))) {
531 dev_warn(&bp->pdev->dev,
532 "No RX buffers complete, status = %02lx\n",
533 (unsigned long)status);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700534 netif_rx_complete(dev, napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100535 goto out;
536 }
537
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700538 work_done = macb_rx(bp, budget);
539 if (work_done < budget)
540 netif_rx_complete(dev, napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100541
542 /*
543 * We've done what we can to clean the buffers. Make sure we
544 * get notified when new packets arrive.
545 */
546out:
547 macb_writel(bp, IER, MACB_RX_INT_FLAGS);
548
549 /* TODO: Handle errors */
550
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700551 return work_done;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100552}
553
554static irqreturn_t macb_interrupt(int irq, void *dev_id)
555{
556 struct net_device *dev = dev_id;
557 struct macb *bp = netdev_priv(dev);
558 u32 status;
559
560 status = macb_readl(bp, ISR);
561
562 if (unlikely(!status))
563 return IRQ_NONE;
564
565 spin_lock(&bp->lock);
566
567 while (status) {
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100568 /* close possible race with dev_close */
569 if (unlikely(!netif_running(dev))) {
570 macb_writel(bp, IDR, ~0UL);
571 break;
572 }
573
574 if (status & MACB_RX_INT_FLAGS) {
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700575 if (netif_rx_schedule_prep(dev, &bp->napi)) {
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100576 /*
577 * There's no point taking any more interrupts
578 * until we have processed the buffers
579 */
580 macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
frederic RODO6c36a702007-07-12 19:07:24 +0200581 dev_dbg(&bp->pdev->dev,
582 "scheduling RX softirq\n");
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700583 __netif_rx_schedule(dev, &bp->napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100584 }
585 }
586
587 if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND)))
588 macb_tx(bp);
589
590 /*
591 * Link change detection isn't possible with RMII, so we'll
592 * add that if/when we get our hands on a full-blown MII PHY.
593 */
594
595 if (status & MACB_BIT(HRESP)) {
596 /*
597 * TODO: Reset the hardware, and maybe move the printk
598 * to a lower-priority context as well (work queue?)
599 */
600 printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n",
601 dev->name);
602 }
603
604 status = macb_readl(bp, ISR);
605 }
606
607 spin_unlock(&bp->lock);
608
609 return IRQ_HANDLED;
610}
611
612static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
613{
614 struct macb *bp = netdev_priv(dev);
615 dma_addr_t mapping;
616 unsigned int len, entry;
617 u32 ctrl;
618
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;
633 spin_lock_irq(&bp->lock);
634
635 /* This is a hard error, log it. */
636 if (TX_BUFFS_AVAIL(bp) < 1) {
637 netif_stop_queue(dev);
638 spin_unlock_irq(&bp->lock);
639 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);
643 return 1;
644 }
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
672 spin_unlock_irq(&bp->lock);
673
674 dev->trans_start = jiffies;
675
676 return 0;
677}
678
679static void macb_free_consistent(struct macb *bp)
680{
681 if (bp->tx_skb) {
682 kfree(bp->tx_skb);
683 bp->tx_skb = NULL;
684 }
685 if (bp->rx_ring) {
686 dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES,
687 bp->rx_ring, bp->rx_ring_dma);
688 bp->rx_ring = NULL;
689 }
690 if (bp->tx_ring) {
691 dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES,
692 bp->tx_ring, bp->tx_ring_dma);
693 bp->tx_ring = NULL;
694 }
695 if (bp->rx_buffers) {
696 dma_free_coherent(&bp->pdev->dev,
697 RX_RING_SIZE * RX_BUFFER_SIZE,
698 bp->rx_buffers, bp->rx_buffers_dma);
699 bp->rx_buffers = NULL;
700 }
701}
702
703static int macb_alloc_consistent(struct macb *bp)
704{
705 int size;
706
707 size = TX_RING_SIZE * sizeof(struct ring_info);
708 bp->tx_skb = kmalloc(size, GFP_KERNEL);
709 if (!bp->tx_skb)
710 goto out_err;
711
712 size = RX_RING_BYTES;
713 bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
714 &bp->rx_ring_dma, GFP_KERNEL);
715 if (!bp->rx_ring)
716 goto out_err;
717 dev_dbg(&bp->pdev->dev,
718 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
719 size, (unsigned long)bp->rx_ring_dma, bp->rx_ring);
720
721 size = TX_RING_BYTES;
722 bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
723 &bp->tx_ring_dma, GFP_KERNEL);
724 if (!bp->tx_ring)
725 goto out_err;
726 dev_dbg(&bp->pdev->dev,
727 "Allocated TX ring of %d bytes at %08lx (mapped %p)\n",
728 size, (unsigned long)bp->tx_ring_dma, bp->tx_ring);
729
730 size = RX_RING_SIZE * RX_BUFFER_SIZE;
731 bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
732 &bp->rx_buffers_dma, GFP_KERNEL);
733 if (!bp->rx_buffers)
734 goto out_err;
735 dev_dbg(&bp->pdev->dev,
736 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
737 size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers);
738
739 return 0;
740
741out_err:
742 macb_free_consistent(bp);
743 return -ENOMEM;
744}
745
746static void macb_init_rings(struct macb *bp)
747{
748 int i;
749 dma_addr_t addr;
750
751 addr = bp->rx_buffers_dma;
752 for (i = 0; i < RX_RING_SIZE; i++) {
753 bp->rx_ring[i].addr = addr;
754 bp->rx_ring[i].ctrl = 0;
755 addr += RX_BUFFER_SIZE;
756 }
757 bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP);
758
759 for (i = 0; i < TX_RING_SIZE; i++) {
760 bp->tx_ring[i].addr = 0;
761 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
762 }
763 bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
764
765 bp->rx_tail = bp->tx_head = bp->tx_tail = 0;
766}
767
768static void macb_reset_hw(struct macb *bp)
769{
770 /* Make sure we have the write buffer for ourselves */
771 wmb();
772
773 /*
774 * Disable RX and TX (XXX: Should we halt the transmission
775 * more gracefully?)
776 */
777 macb_writel(bp, NCR, 0);
778
779 /* Clear the stats registers (XXX: Update stats first?) */
780 macb_writel(bp, NCR, MACB_BIT(CLRSTAT));
781
782 /* Clear all status flags */
783 macb_writel(bp, TSR, ~0UL);
784 macb_writel(bp, RSR, ~0UL);
785
786 /* Disable all interrupts */
787 macb_writel(bp, IDR, ~0UL);
788 macb_readl(bp, ISR);
789}
790
791static void macb_init_hw(struct macb *bp)
792{
793 u32 config;
794
795 macb_reset_hw(bp);
796 __macb_set_hwaddr(bp);
797
798 config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
799 config |= MACB_BIT(PAE); /* PAuse Enable */
800 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
801 if (bp->dev->flags & IFF_PROMISC)
802 config |= MACB_BIT(CAF); /* Copy All Frames */
803 if (!(bp->dev->flags & IFF_BROADCAST))
804 config |= MACB_BIT(NBC); /* No BroadCast */
805 macb_writel(bp, NCFGR, config);
806
807 /* Initialize TX and RX buffers */
808 macb_writel(bp, RBQP, bp->rx_ring_dma);
809 macb_writel(bp, TBQP, bp->tx_ring_dma);
810
811 /* Enable TX and RX */
frederic RODO6c36a702007-07-12 19:07:24 +0200812 macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100813
814 /* Enable interrupts */
815 macb_writel(bp, IER, (MACB_BIT(RCOMP)
816 | MACB_BIT(RXUBR)
817 | MACB_BIT(ISR_TUND)
818 | MACB_BIT(ISR_RLE)
819 | MACB_BIT(TXERR)
820 | MACB_BIT(TCOMP)
821 | MACB_BIT(ISR_ROVR)
822 | MACB_BIT(HRESP)));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100823
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100824}
825
Patrice Vilchez446ebd02007-07-12 19:07:25 +0200826/*
827 * The hash address register is 64 bits long and takes up two
828 * locations in the memory map. The least significant bits are stored
829 * in EMAC_HSL and the most significant bits in EMAC_HSH.
830 *
831 * The unicast hash enable and the multicast hash enable bits in the
832 * network configuration register enable the reception of hash matched
833 * frames. The destination address is reduced to a 6 bit index into
834 * the 64 bit hash register using the following hash function. The
835 * hash function is an exclusive or of every sixth bit of the
836 * destination address.
837 *
838 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
839 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
840 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
841 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
842 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
843 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
844 *
845 * da[0] represents the least significant bit of the first byte
846 * received, that is, the multicast/unicast indicator, and da[47]
847 * represents the most significant bit of the last byte received. If
848 * the hash index, hi[n], points to a bit that is set in the hash
849 * register then the frame will be matched according to whether the
850 * frame is multicast or unicast. A multicast match will be signalled
851 * if the multicast hash enable bit is set, da[0] is 1 and the hash
852 * index points to a bit set in the hash register. A unicast match
853 * will be signalled if the unicast hash enable bit is set, da[0] is 0
854 * and the hash index points to a bit set in the hash register. To
855 * receive all multicast frames, the hash register should be set with
856 * all ones and the multicast hash enable bit should be set in the
857 * network configuration register.
858 */
859
860static inline int hash_bit_value(int bitnr, __u8 *addr)
861{
862 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
863 return 1;
864 return 0;
865}
866
867/*
868 * Return the hash index value for the specified address.
869 */
870static int hash_get_index(__u8 *addr)
871{
872 int i, j, bitval;
873 int hash_index = 0;
874
875 for (j = 0; j < 6; j++) {
876 for (i = 0, bitval = 0; i < 8; i++)
877 bitval ^= hash_bit_value(i*6 + j, addr);
878
879 hash_index |= (bitval << j);
880 }
881
882 return hash_index;
883}
884
885/*
886 * Add multicast addresses to the internal multicast-hash table.
887 */
888static void macb_sethashtable(struct net_device *dev)
889{
890 struct dev_mc_list *curr;
891 unsigned long mc_filter[2];
892 unsigned int i, bitnr;
893 struct macb *bp = netdev_priv(dev);
894
895 mc_filter[0] = mc_filter[1] = 0;
896
897 curr = dev->mc_list;
898 for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
899 if (!curr) break; /* unexpected end of list */
900
901 bitnr = hash_get_index(curr->dmi_addr);
902 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
903 }
904
905 macb_writel(bp, HRB, mc_filter[0]);
906 macb_writel(bp, HRT, mc_filter[1]);
907}
908
909/*
910 * Enable/Disable promiscuous and multicast modes.
911 */
912static void macb_set_rx_mode(struct net_device *dev)
913{
914 unsigned long cfg;
915 struct macb *bp = netdev_priv(dev);
916
917 cfg = macb_readl(bp, NCFGR);
918
919 if (dev->flags & IFF_PROMISC)
920 /* Enable promiscuous mode */
921 cfg |= MACB_BIT(CAF);
922 else if (dev->flags & (~IFF_PROMISC))
923 /* Disable promiscuous mode */
924 cfg &= ~MACB_BIT(CAF);
925
926 if (dev->flags & IFF_ALLMULTI) {
927 /* Enable all multicast mode */
928 macb_writel(bp, HRB, -1);
929 macb_writel(bp, HRT, -1);
930 cfg |= MACB_BIT(NCFGR_MTI);
931 } else if (dev->mc_count > 0) {
932 /* Enable specific multicasts */
933 macb_sethashtable(dev);
934 cfg |= MACB_BIT(NCFGR_MTI);
935 } else if (dev->flags & (~IFF_ALLMULTI)) {
936 /* Disable all multicast mode */
937 macb_writel(bp, HRB, 0);
938 macb_writel(bp, HRT, 0);
939 cfg &= ~MACB_BIT(NCFGR_MTI);
940 }
941
942 macb_writel(bp, NCFGR, cfg);
943}
944
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100945static int macb_open(struct net_device *dev)
946{
947 struct macb *bp = netdev_priv(dev);
948 int err;
949
950 dev_dbg(&bp->pdev->dev, "open\n");
951
frederic RODO6c36a702007-07-12 19:07:24 +0200952 /* if the phy is not yet register, retry later*/
953 if (!bp->phy_dev)
954 return -EAGAIN;
955
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100956 if (!is_valid_ether_addr(dev->dev_addr))
957 return -EADDRNOTAVAIL;
958
959 err = macb_alloc_consistent(bp);
960 if (err) {
961 printk(KERN_ERR
962 "%s: Unable to allocate DMA memory (error %d)\n",
963 dev->name, err);
964 return err;
965 }
966
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700967 napi_enable(&bp->napi);
968
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100969 macb_init_rings(bp);
970 macb_init_hw(bp);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100971
frederic RODO6c36a702007-07-12 19:07:24 +0200972 /* schedule a link state check */
973 phy_start(bp->phy_dev);
974
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100975 netif_start_queue(dev);
976
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100977 return 0;
978}
979
980static int macb_close(struct net_device *dev)
981{
982 struct macb *bp = netdev_priv(dev);
983 unsigned long flags;
984
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100985 netif_stop_queue(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700986 napi_disable(&bp->napi);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100987
frederic RODO6c36a702007-07-12 19:07:24 +0200988 if (bp->phy_dev)
989 phy_stop(bp->phy_dev);
990
Haavard Skinnemoen89e57852006-11-09 14:51:17 +0100991 spin_lock_irqsave(&bp->lock, flags);
992 macb_reset_hw(bp);
993 netif_carrier_off(dev);
994 spin_unlock_irqrestore(&bp->lock, flags);
995
996 macb_free_consistent(bp);
997
998 return 0;
999}
1000
1001static struct net_device_stats *macb_get_stats(struct net_device *dev)
1002{
1003 struct macb *bp = netdev_priv(dev);
1004 struct net_device_stats *nstat = &bp->stats;
1005 struct macb_stats *hwstat = &bp->hw_stats;
1006
frederic RODO6c36a702007-07-12 19:07:24 +02001007 /* read stats from hardware */
1008 macb_update_stats(bp);
1009
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001010 /* Convert HW stats into netdevice stats */
1011 nstat->rx_errors = (hwstat->rx_fcs_errors +
1012 hwstat->rx_align_errors +
1013 hwstat->rx_resource_errors +
1014 hwstat->rx_overruns +
1015 hwstat->rx_oversize_pkts +
1016 hwstat->rx_jabbers +
1017 hwstat->rx_undersize_pkts +
1018 hwstat->sqe_test_errors +
1019 hwstat->rx_length_mismatch);
1020 nstat->tx_errors = (hwstat->tx_late_cols +
1021 hwstat->tx_excessive_cols +
1022 hwstat->tx_underruns +
1023 hwstat->tx_carrier_errors);
1024 nstat->collisions = (hwstat->tx_single_cols +
1025 hwstat->tx_multiple_cols +
1026 hwstat->tx_excessive_cols);
1027 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1028 hwstat->rx_jabbers +
1029 hwstat->rx_undersize_pkts +
1030 hwstat->rx_length_mismatch);
1031 nstat->rx_over_errors = hwstat->rx_resource_errors;
1032 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
1033 nstat->rx_frame_errors = hwstat->rx_align_errors;
1034 nstat->rx_fifo_errors = hwstat->rx_overruns;
1035 /* XXX: What does "missed" mean? */
1036 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
1037 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
1038 nstat->tx_fifo_errors = hwstat->tx_underruns;
1039 /* Don't know about heartbeat or window errors... */
1040
1041 return nstat;
1042}
1043
1044static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1045{
1046 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001047 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001048
frederic RODO6c36a702007-07-12 19:07:24 +02001049 if (!phydev)
1050 return -ENODEV;
1051
1052 return phy_ethtool_gset(phydev, cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001053}
1054
1055static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1056{
1057 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001058 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001059
frederic RODO6c36a702007-07-12 19:07:24 +02001060 if (!phydev)
1061 return -ENODEV;
1062
1063 return phy_ethtool_sset(phydev, cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001064}
1065
frederic RODO6c36a702007-07-12 19:07:24 +02001066static void macb_get_drvinfo(struct net_device *dev,
1067 struct ethtool_drvinfo *info)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001068{
1069 struct macb *bp = netdev_priv(dev);
1070
1071 strcpy(info->driver, bp->pdev->dev.driver->name);
1072 strcpy(info->version, "$Revision: 1.14 $");
1073 strcpy(info->bus_info, bp->pdev->dev.bus_id);
1074}
1075
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001076static struct ethtool_ops macb_ethtool_ops = {
1077 .get_settings = macb_get_settings,
1078 .set_settings = macb_set_settings,
1079 .get_drvinfo = macb_get_drvinfo,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001080 .get_link = ethtool_op_get_link,
1081};
1082
1083static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1084{
1085 struct macb *bp = netdev_priv(dev);
frederic RODO6c36a702007-07-12 19:07:24 +02001086 struct phy_device *phydev = bp->phy_dev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001087
1088 if (!netif_running(dev))
1089 return -EINVAL;
1090
frederic RODO6c36a702007-07-12 19:07:24 +02001091 if (!phydev)
1092 return -ENODEV;
1093
1094 return phy_mii_ioctl(phydev, if_mii(rq), cmd);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001095}
1096
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001097static int __init macb_probe(struct platform_device *pdev)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001098{
1099 struct eth_platform_data *pdata;
1100 struct resource *regs;
1101 struct net_device *dev;
1102 struct macb *bp;
frederic RODO6c36a702007-07-12 19:07:24 +02001103 struct phy_device *phydev;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001104 unsigned long pclk_hz;
1105 u32 config;
1106 int err = -ENXIO;
Joe Perches0795af52007-10-03 17:59:30 -07001107 DECLARE_MAC_BUF(mac);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001108
1109 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1110 if (!regs) {
1111 dev_err(&pdev->dev, "no mmio resource defined\n");
1112 goto err_out;
1113 }
1114
1115 err = -ENOMEM;
1116 dev = alloc_etherdev(sizeof(*bp));
1117 if (!dev) {
1118 dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
1119 goto err_out;
1120 }
1121
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001122 SET_NETDEV_DEV(dev, &pdev->dev);
1123
1124 /* TODO: Actually, we have some interesting features... */
1125 dev->features |= 0;
1126
1127 bp = netdev_priv(dev);
1128 bp->pdev = pdev;
1129 bp->dev = dev;
1130
1131 spin_lock_init(&bp->lock);
1132
Andrew Victor0cc86742007-02-07 16:40:44 +01001133#if defined(CONFIG_ARCH_AT91)
1134 bp->pclk = clk_get(&pdev->dev, "macb_clk");
1135 if (IS_ERR(bp->pclk)) {
1136 dev_err(&pdev->dev, "failed to get macb_clk\n");
1137 goto err_out_free_dev;
1138 }
1139 clk_enable(bp->pclk);
1140#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001141 bp->pclk = clk_get(&pdev->dev, "pclk");
1142 if (IS_ERR(bp->pclk)) {
1143 dev_err(&pdev->dev, "failed to get pclk\n");
1144 goto err_out_free_dev;
1145 }
1146 bp->hclk = clk_get(&pdev->dev, "hclk");
1147 if (IS_ERR(bp->hclk)) {
1148 dev_err(&pdev->dev, "failed to get hclk\n");
1149 goto err_out_put_pclk;
1150 }
1151
1152 clk_enable(bp->pclk);
1153 clk_enable(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001154#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001155
1156 bp->regs = ioremap(regs->start, regs->end - regs->start + 1);
1157 if (!bp->regs) {
1158 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
1159 err = -ENOMEM;
1160 goto err_out_disable_clocks;
1161 }
1162
1163 dev->irq = platform_get_irq(pdev, 0);
Thomas Gleixner38515e92007-02-14 00:33:16 -08001164 err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001165 dev->name, dev);
1166 if (err) {
1167 printk(KERN_ERR
1168 "%s: Unable to request IRQ %d (error %d)\n",
1169 dev->name, dev->irq, err);
1170 goto err_out_iounmap;
1171 }
1172
1173 dev->open = macb_open;
1174 dev->stop = macb_close;
1175 dev->hard_start_xmit = macb_start_xmit;
1176 dev->get_stats = macb_get_stats;
Patrice Vilchez446ebd02007-07-12 19:07:25 +02001177 dev->set_multicast_list = macb_set_rx_mode;
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001178 dev->do_ioctl = macb_ioctl;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001179 netif_napi_add(dev, &bp->napi, macb_poll, 64);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001180 dev->ethtool_ops = &macb_ethtool_ops;
1181
1182 dev->base_addr = regs->start;
1183
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001184 /* Set MII management clock divider */
1185 pclk_hz = clk_get_rate(bp->pclk);
1186 if (pclk_hz <= 20000000)
1187 config = MACB_BF(CLK, MACB_CLK_DIV8);
1188 else if (pclk_hz <= 40000000)
1189 config = MACB_BF(CLK, MACB_CLK_DIV16);
1190 else if (pclk_hz <= 80000000)
1191 config = MACB_BF(CLK, MACB_CLK_DIV32);
1192 else
1193 config = MACB_BF(CLK, MACB_CLK_DIV64);
1194 macb_writel(bp, NCFGR, config);
1195
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001196 macb_get_hwaddr(bp);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001197 pdata = pdev->dev.platform_data;
frederic RODO6c36a702007-07-12 19:07:24 +02001198
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001199 if (pdata && pdata->is_rmii)
Andrew Victor0cc86742007-02-07 16:40:44 +01001200#if defined(CONFIG_ARCH_AT91)
1201 macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
1202#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001203 macb_writel(bp, USRIO, 0);
Andrew Victor0cc86742007-02-07 16:40:44 +01001204#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001205 else
Andrew Victor0cc86742007-02-07 16:40:44 +01001206#if defined(CONFIG_ARCH_AT91)
1207 macb_writel(bp, USRIO, MACB_BIT(CLKEN));
1208#else
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001209 macb_writel(bp, USRIO, MACB_BIT(MII));
Andrew Victor0cc86742007-02-07 16:40:44 +01001210#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001211
1212 bp->tx_pending = DEF_TX_RING_PENDING;
1213
1214 err = register_netdev(dev);
1215 if (err) {
1216 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
1217 goto err_out_free_irq;
1218 }
1219
frederic RODO6c36a702007-07-12 19:07:24 +02001220 if (macb_mii_init(bp) != 0) {
1221 goto err_out_unregister_netdev;
1222 }
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001223
frederic RODO6c36a702007-07-12 19:07:24 +02001224 platform_set_drvdata(pdev, dev);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001225
1226 printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d "
Joe Perches0795af52007-10-03 17:59:30 -07001227 "(%s)\n",
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001228 dev->name, dev->base_addr, dev->irq,
Joe Perches0795af52007-10-03 17:59:30 -07001229 print_mac(mac, dev->dev_addr));
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001230
frederic RODO6c36a702007-07-12 19:07:24 +02001231 phydev = bp->phy_dev;
1232 printk(KERN_INFO "%s: attached PHY driver [%s] "
1233 "(mii_bus:phy_addr=%s, irq=%d)\n",
1234 dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
1235
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001236 return 0;
1237
frederic RODO6c36a702007-07-12 19:07:24 +02001238err_out_unregister_netdev:
1239 unregister_netdev(dev);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001240err_out_free_irq:
1241 free_irq(dev->irq, dev);
1242err_out_iounmap:
1243 iounmap(bp->regs);
1244err_out_disable_clocks:
Andrew Victor0cc86742007-02-07 16:40:44 +01001245#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001246 clk_disable(bp->hclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001247 clk_put(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001248#endif
1249 clk_disable(bp->pclk);
frederic RODO6c36a702007-07-12 19:07:24 +02001250#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001251err_out_put_pclk:
frederic RODO6c36a702007-07-12 19:07:24 +02001252#endif
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001253 clk_put(bp->pclk);
1254err_out_free_dev:
1255 free_netdev(dev);
1256err_out:
1257 platform_set_drvdata(pdev, NULL);
1258 return err;
1259}
1260
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001261static int __exit macb_remove(struct platform_device *pdev)
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001262{
1263 struct net_device *dev;
1264 struct macb *bp;
1265
1266 dev = platform_get_drvdata(pdev);
1267
1268 if (dev) {
1269 bp = netdev_priv(dev);
Atsushi Nemoto84b79012008-04-10 23:30:07 +09001270 if (bp->phy_dev)
1271 phy_disconnect(bp->phy_dev);
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07001272 mdiobus_unregister(bp->mii_bus);
1273 kfree(bp->mii_bus->irq);
1274 mdiobus_free(bp->mii_bus);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001275 unregister_netdev(dev);
1276 free_irq(dev->irq, dev);
1277 iounmap(bp->regs);
Andrew Victor0cc86742007-02-07 16:40:44 +01001278#ifndef CONFIG_ARCH_AT91
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001279 clk_disable(bp->hclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001280 clk_put(bp->hclk);
Andrew Victor0cc86742007-02-07 16:40:44 +01001281#endif
1282 clk_disable(bp->pclk);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001283 clk_put(bp->pclk);
1284 free_netdev(dev);
1285 platform_set_drvdata(pdev, NULL);
1286 }
1287
1288 return 0;
1289}
1290
Haavard Skinnemoenc1f598f2008-03-04 13:39:29 +01001291#ifdef CONFIG_PM
1292static int macb_suspend(struct platform_device *pdev, pm_message_t state)
1293{
1294 struct net_device *netdev = platform_get_drvdata(pdev);
1295 struct macb *bp = netdev_priv(netdev);
1296
1297 netif_device_detach(netdev);
1298
1299#ifndef CONFIG_ARCH_AT91
1300 clk_disable(bp->hclk);
1301#endif
1302 clk_disable(bp->pclk);
1303
1304 return 0;
1305}
1306
1307static int macb_resume(struct platform_device *pdev)
1308{
1309 struct net_device *netdev = platform_get_drvdata(pdev);
1310 struct macb *bp = netdev_priv(netdev);
1311
1312 clk_enable(bp->pclk);
1313#ifndef CONFIG_ARCH_AT91
1314 clk_enable(bp->hclk);
1315#endif
1316
1317 netif_device_attach(netdev);
1318
1319 return 0;
1320}
1321#else
1322#define macb_suspend NULL
1323#define macb_resume NULL
1324#endif
1325
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001326static struct platform_driver macb_driver = {
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001327 .remove = __exit_p(macb_remove),
Haavard Skinnemoenc1f598f2008-03-04 13:39:29 +01001328 .suspend = macb_suspend,
1329 .resume = macb_resume,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001330 .driver = {
1331 .name = "macb",
Kay Sievers72abb462008-04-18 13:50:44 -07001332 .owner = THIS_MODULE,
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001333 },
1334};
1335
1336static int __init macb_init(void)
1337{
Haavard Skinnemoen06c3fd62008-01-31 13:10:22 +01001338 return platform_driver_probe(&macb_driver, macb_probe);
Haavard Skinnemoen89e57852006-11-09 14:51:17 +01001339}
1340
1341static void __exit macb_exit(void)
1342{
1343 platform_driver_unregister(&macb_driver);
1344}
1345
1346module_init(macb_init);
1347module_exit(macb_exit);
1348
1349MODULE_LICENSE("GPL");
1350MODULE_DESCRIPTION("Atmel MACB Ethernet driver");
1351MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
Kay Sievers72abb462008-04-18 13:50:44 -07001352MODULE_ALIAS("platform:macb");