2 * EP93xx ethernet network device driver
3 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
4 * Dedicated to Marija Kulikova.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/config.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/netdevice.h>
17 #include <linux/mii.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ethtool.h>
20 #include <linux/init.h>
21 #include <linux/moduleparam.h>
22 #include <linux/platform_device.h>
23 #include <linux/delay.h>
24 #include <asm/arch/ep93xx-regs.h>
25 #include <asm/arch/platform.h>
28 #define DRV_MODULE_NAME "ep93xx-eth"
29 #define DRV_MODULE_VERSION "0.1"
31 #define RX_QUEUE_ENTRIES 64
32 #define TX_QUEUE_ENTRIES 8
34 #define MAX_PKT_SIZE 2044
35 #define PKT_BUF_SIZE 2048
37 #define REG_RXCTL 0x0000
38 #define REG_RXCTL_DEFAULT 0x00073800
39 #define REG_TXCTL 0x0004
40 #define REG_TXCTL_ENABLE 0x00000001
41 #define REG_MIICMD 0x0010
42 #define REG_MIICMD_READ 0x00008000
43 #define REG_MIICMD_WRITE 0x00004000
44 #define REG_MIIDATA 0x0014
45 #define REG_MIISTS 0x0018
46 #define REG_MIISTS_BUSY 0x00000001
47 #define REG_SELFCTL 0x0020
48 #define REG_SELFCTL_RESET 0x00000001
49 #define REG_INTEN 0x0024
50 #define REG_INTEN_TX 0x00000008
51 #define REG_INTEN_RX 0x00000007
52 #define REG_INTSTSP 0x0028
53 #define REG_INTSTS_TX 0x00000008
54 #define REG_INTSTS_RX 0x00000004
55 #define REG_INTSTSC 0x002c
56 #define REG_AFP 0x004c
57 #define REG_INDAD0 0x0050
58 #define REG_INDAD1 0x0051
59 #define REG_INDAD2 0x0052
60 #define REG_INDAD3 0x0053
61 #define REG_INDAD4 0x0054
62 #define REG_INDAD5 0x0055
63 #define REG_GIINTMSK 0x0064
64 #define REG_GIINTMSK_ENABLE 0x00008000
65 #define REG_BMCTL 0x0080
66 #define REG_BMCTL_ENABLE_TX 0x00000100
67 #define REG_BMCTL_ENABLE_RX 0x00000001
68 #define REG_BMSTS 0x0084
69 #define REG_BMSTS_RX_ACTIVE 0x00000008
70 #define REG_RXDQBADD 0x0090
71 #define REG_RXDQBLEN 0x0094
72 #define REG_RXDCURADD 0x0098
73 #define REG_RXDENQ 0x009c
74 #define REG_RXSTSQBADD 0x00a0
75 #define REG_RXSTSQBLEN 0x00a4
76 #define REG_RXSTSQCURADD 0x00a8
77 #define REG_RXSTSENQ 0x00ac
78 #define REG_TXDQBADD 0x00b0
79 #define REG_TXDQBLEN 0x00b4
80 #define REG_TXDQCURADD 0x00b8
81 #define REG_TXDENQ 0x00bc
82 #define REG_TXSTSQBADD 0x00c0
83 #define REG_TXSTSQBLEN 0x00c4
84 #define REG_TXSTSQCURADD 0x00c8
85 #define REG_MAXFRMLEN 0x00e8
93 #define RDESC1_NSOF 0x80000000
94 #define RDESC1_BUFFER_INDEX 0x7fff0000
95 #define RDESC1_BUFFER_LENGTH 0x0000ffff
103 #define RSTAT0_RFP 0x80000000
104 #define RSTAT0_RWE 0x40000000
105 #define RSTAT0_EOF 0x20000000
106 #define RSTAT0_EOB 0x10000000
107 #define RSTAT0_AM 0x00c00000
108 #define RSTAT0_RX_ERR 0x00200000
109 #define RSTAT0_OE 0x00100000
110 #define RSTAT0_FE 0x00080000
111 #define RSTAT0_RUNT 0x00040000
112 #define RSTAT0_EDATA 0x00020000
113 #define RSTAT0_CRCE 0x00010000
114 #define RSTAT0_CRCI 0x00008000
115 #define RSTAT0_HTI 0x00003f00
116 #define RSTAT1_RFP 0x80000000
117 #define RSTAT1_BUFFER_INDEX 0x7fff0000
118 #define RSTAT1_FRAME_LENGTH 0x0000ffff
126 #define TDESC1_EOF 0x80000000
127 #define TDESC1_BUFFER_INDEX 0x7fff0000
128 #define TDESC1_BUFFER_ABORT 0x00008000
129 #define TDESC1_BUFFER_LENGTH 0x00000fff
136 #define TSTAT0_TXFP 0x80000000
137 #define TSTAT0_TXWE 0x40000000
138 #define TSTAT0_FA 0x20000000
139 #define TSTAT0_LCRS 0x10000000
140 #define TSTAT0_OW 0x04000000
141 #define TSTAT0_TXU 0x02000000
142 #define TSTAT0_ECOLL 0x01000000
143 #define TSTAT0_NCOLL 0x001f0000
144 #define TSTAT0_BUFFER_INDEX 0x00007fff
148 struct ep93xx_rdesc rdesc[RX_QUEUE_ENTRIES];
149 struct ep93xx_tdesc tdesc[TX_QUEUE_ENTRIES];
150 struct ep93xx_rstat rstat[RX_QUEUE_ENTRIES];
151 struct ep93xx_tstat tstat[TX_QUEUE_ENTRIES];
156 struct resource *res;
160 struct ep93xx_descs *descs;
161 dma_addr_t descs_dma_addr;
163 void *rx_buf[RX_QUEUE_ENTRIES];
164 void *tx_buf[TX_QUEUE_ENTRIES];
167 unsigned int rx_pointer;
168 unsigned int tx_clean_pointer;
169 unsigned int tx_pointer;
170 spinlock_t tx_pending_lock;
171 unsigned int tx_pending;
173 struct net_device_stats stats;
175 struct mii_if_info mii;
179 #define rdb(ep, off) __raw_readb((ep)->base_addr + (off))
180 #define rdw(ep, off) __raw_readw((ep)->base_addr + (off))
181 #define rdl(ep, off) __raw_readl((ep)->base_addr + (off))
182 #define wrb(ep, off, val) __raw_writeb((val), (ep)->base_addr + (off))
183 #define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
184 #define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))
186 static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
188 static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
190 struct ep93xx_priv *ep = netdev_priv(dev);
194 static int ep93xx_rx(struct net_device *dev, int *budget)
196 struct ep93xx_priv *ep = netdev_priv(dev);
201 tail_offset = rdl(ep, REG_RXSTSQCURADD) - ep->descs_dma_addr;
205 while (*budget > 0) {
207 struct ep93xx_rstat *rstat;
213 entry = ep->rx_pointer;
214 rstat = ep->descs->rstat + entry;
215 if ((void *)rstat - (void *)ep->descs == tail_offset) {
220 rstat0 = rstat->rstat0;
221 rstat1 = rstat->rstat1;
225 if (!(rstat0 & RSTAT0_RFP))
226 printk(KERN_CRIT "ep93xx_rx: buffer not done "
227 " %.8x %.8x\n", rstat0, rstat1);
228 if (!(rstat0 & RSTAT0_EOF))
229 printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
230 " %.8x %.8x\n", rstat0, rstat1);
231 if (!(rstat0 & RSTAT0_EOB))
232 printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
233 " %.8x %.8x\n", rstat0, rstat1);
234 if (!(rstat1 & RSTAT1_RFP))
235 printk(KERN_CRIT "ep93xx_rx: buffer1 not done "
236 " %.8x %.8x\n", rstat0, rstat1);
237 if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
238 printk(KERN_CRIT "ep93xx_rx: entry mismatch "
239 " %.8x %.8x\n", rstat0, rstat1);
241 if (!(rstat0 & RSTAT0_RWE)) {
242 printk(KERN_NOTICE "ep93xx_rx: receive error "
243 " %.8x %.8x\n", rstat0, rstat1);
245 ep->stats.rx_errors++;
246 if (rstat0 & RSTAT0_OE)
247 ep->stats.rx_fifo_errors++;
248 if (rstat0 & RSTAT0_FE)
249 ep->stats.rx_frame_errors++;
250 if (rstat0 & (RSTAT0_RUNT | RSTAT0_EDATA))
251 ep->stats.rx_length_errors++;
252 if (rstat0 & RSTAT0_CRCE)
253 ep->stats.rx_crc_errors++;
257 length = rstat1 & RSTAT1_FRAME_LENGTH;
258 if (length > MAX_PKT_SIZE) {
259 printk(KERN_NOTICE "ep93xx_rx: invalid length "
260 " %.8x %.8x\n", rstat0, rstat1);
265 if (rstat0 & RSTAT0_CRCI)
268 skb = dev_alloc_skb(length + 2);
269 if (likely(skb != NULL)) {
272 dma_sync_single(NULL, ep->descs->rdesc[entry].buf_addr,
273 length, DMA_FROM_DEVICE);
274 eth_copy_and_sum(skb, ep->rx_buf[entry], length, 0);
275 skb_put(skb, length);
276 skb->protocol = eth_type_trans(skb, dev);
278 dev->last_rx = jiffies;
280 netif_receive_skb(skb);
282 ep->stats.rx_packets++;
283 ep->stats.rx_bytes += length;
285 ep->stats.rx_dropped++;
289 ep->rx_pointer = (entry + 1) & (RX_QUEUE_ENTRIES - 1);
296 wrw(ep, REG_RXDENQ, processed);
297 wrw(ep, REG_RXSTSENQ, processed);
303 static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
305 struct ep93xx_rstat *rstat;
308 rstat = ep->descs->rstat + ep->rx_pointer;
309 tail_offset = rdl(ep, REG_RXSTSQCURADD) - ep->descs_dma_addr;
311 return !((void *)rstat - (void *)ep->descs == tail_offset);
314 static int ep93xx_poll(struct net_device *dev, int *budget)
316 struct ep93xx_priv *ep = netdev_priv(dev);
319 * @@@ Have to stop polling if device is downed while we
324 if (ep93xx_rx(dev, budget))
327 netif_rx_complete(dev);
329 spin_lock_irq(&ep->rx_lock);
330 wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
331 if (ep93xx_have_more_rx(ep)) {
332 wrl(ep, REG_INTEN, REG_INTEN_TX);
333 wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
334 spin_unlock_irq(&ep->rx_lock);
336 if (netif_rx_reschedule(dev, 0))
341 spin_unlock_irq(&ep->rx_lock);
346 static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
348 struct ep93xx_priv *ep = netdev_priv(dev);
351 if (unlikely(skb->len) > MAX_PKT_SIZE) {
352 ep->stats.tx_dropped++;
357 entry = ep->tx_pointer;
358 ep->tx_pointer = (ep->tx_pointer + 1) & (TX_QUEUE_ENTRIES - 1);
360 ep->descs->tdesc[entry].tdesc1 =
361 TDESC1_EOF | (entry << 16) | (skb->len & 0xfff);
362 skb_copy_and_csum_dev(skb, ep->tx_buf[entry]);
363 dma_sync_single(NULL, ep->descs->tdesc[entry].buf_addr,
364 skb->len, DMA_TO_DEVICE);
367 dev->trans_start = jiffies;
369 spin_lock_irq(&ep->tx_pending_lock);
371 if (ep->tx_pending == TX_QUEUE_ENTRIES)
372 netif_stop_queue(dev);
373 spin_unlock_irq(&ep->tx_pending_lock);
375 wrl(ep, REG_TXDENQ, 1);
380 static void ep93xx_tx_complete(struct net_device *dev)
382 struct ep93xx_priv *ep = netdev_priv(dev);
386 tail_offset = rdl(ep, REG_TXSTSQCURADD) - ep->descs_dma_addr;
389 spin_lock(&ep->tx_pending_lock);
392 struct ep93xx_tstat *tstat;
395 entry = ep->tx_clean_pointer;
396 tstat = ep->descs->tstat + entry;
397 if ((void *)tstat - (void *)ep->descs == tail_offset)
400 tstat0 = tstat->tstat0;
403 if (!(tstat0 & TSTAT0_TXFP))
404 printk(KERN_CRIT "ep93xx_tx_complete: buffer not done "
406 if (tstat0 & TSTAT0_FA)
407 printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
409 if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
410 printk(KERN_CRIT "ep93xx_tx_complete: entry mismatch "
413 if (tstat0 & TSTAT0_TXWE) {
414 int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
416 ep->stats.tx_packets++;
417 ep->stats.tx_bytes += length;
419 ep->stats.tx_errors++;
422 if (tstat0 & TSTAT0_OW)
423 ep->stats.tx_window_errors++;
424 if (tstat0 & TSTAT0_TXU)
425 ep->stats.tx_fifo_errors++;
426 ep->stats.collisions += (tstat0 >> 16) & 0x1f;
428 ep->tx_clean_pointer = (entry + 1) & (TX_QUEUE_ENTRIES - 1);
429 if (ep->tx_pending == TX_QUEUE_ENTRIES)
433 spin_unlock(&ep->tx_pending_lock);
436 netif_wake_queue(dev);
439 static irqreturn_t ep93xx_irq(int irq, void *dev_id, struct pt_regs *regs)
441 struct net_device *dev = dev_id;
442 struct ep93xx_priv *ep = netdev_priv(dev);
445 status = rdl(ep, REG_INTSTSC);
449 if (status & REG_INTSTS_RX) {
450 spin_lock(&ep->rx_lock);
451 if (likely(__netif_rx_schedule_prep(dev))) {
452 wrl(ep, REG_INTEN, REG_INTEN_TX);
453 __netif_rx_schedule(dev);
455 spin_unlock(&ep->rx_lock);
458 if (status & REG_INTSTS_TX)
459 ep93xx_tx_complete(dev);
464 static void ep93xx_free_buffers(struct ep93xx_priv *ep)
468 for (i = 0; i < RX_QUEUE_ENTRIES; i += 2) {
471 d = ep->descs->rdesc[i].buf_addr;
473 dma_unmap_single(NULL, d, PAGE_SIZE, DMA_FROM_DEVICE);
475 if (ep->rx_buf[i] != NULL)
476 free_page((unsigned long)ep->rx_buf[i]);
479 for (i = 0; i < TX_QUEUE_ENTRIES; i += 2) {
482 d = ep->descs->tdesc[i].buf_addr;
484 dma_unmap_single(NULL, d, PAGE_SIZE, DMA_TO_DEVICE);
486 if (ep->tx_buf[i] != NULL)
487 free_page((unsigned long)ep->tx_buf[i]);
490 dma_free_coherent(NULL, sizeof(struct ep93xx_descs), ep->descs,
495 * The hardware enforces a sub-2K maximum packet size, so we put
496 * two buffers on every hardware page.
498 static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
502 ep->descs = dma_alloc_coherent(NULL, sizeof(struct ep93xx_descs),
503 &ep->descs_dma_addr, GFP_KERNEL | GFP_DMA);
504 if (ep->descs == NULL)
507 for (i = 0; i < RX_QUEUE_ENTRIES; i += 2) {
511 page = (void *)__get_free_page(GFP_KERNEL | GFP_DMA);
515 d = dma_map_single(NULL, page, PAGE_SIZE, DMA_FROM_DEVICE);
516 if (dma_mapping_error(d)) {
517 free_page((unsigned long)page);
521 ep->rx_buf[i] = page;
522 ep->descs->rdesc[i].buf_addr = d;
523 ep->descs->rdesc[i].rdesc1 = (i << 16) | PKT_BUF_SIZE;
525 ep->rx_buf[i + 1] = page + PKT_BUF_SIZE;
526 ep->descs->rdesc[i + 1].buf_addr = d + PKT_BUF_SIZE;
527 ep->descs->rdesc[i + 1].rdesc1 = ((i + 1) << 16) | PKT_BUF_SIZE;
530 for (i = 0; i < TX_QUEUE_ENTRIES; i += 2) {
534 page = (void *)__get_free_page(GFP_KERNEL | GFP_DMA);
538 d = dma_map_single(NULL, page, PAGE_SIZE, DMA_TO_DEVICE);
539 if (dma_mapping_error(d)) {
540 free_page((unsigned long)page);
544 ep->tx_buf[i] = page;
545 ep->descs->tdesc[i].buf_addr = d;
547 ep->tx_buf[i + 1] = page + PKT_BUF_SIZE;
548 ep->descs->tdesc[i + 1].buf_addr = d + PKT_BUF_SIZE;
554 ep93xx_free_buffers(ep);
558 static int ep93xx_start_hw(struct net_device *dev)
560 struct ep93xx_priv *ep = netdev_priv(dev);
564 wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
565 for (i = 0; i < 10; i++) {
566 if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
572 printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
576 wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9));
578 /* Does the PHY support preamble suppress? */
579 if ((ep93xx_mdio_read(dev, ep->mii.phy_id, MII_BMSR) & 0x0040) != 0)
580 wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9) | (1 << 8));
582 /* Receive descriptor ring. */
583 addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
584 wrl(ep, REG_RXDQBADD, addr);
585 wrl(ep, REG_RXDCURADD, addr);
586 wrw(ep, REG_RXDQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rdesc));
588 /* Receive status ring. */
589 addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rstat);
590 wrl(ep, REG_RXSTSQBADD, addr);
591 wrl(ep, REG_RXSTSQCURADD, addr);
592 wrw(ep, REG_RXSTSQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rstat));
594 /* Transmit descriptor ring. */
595 addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tdesc);
596 wrl(ep, REG_TXDQBADD, addr);
597 wrl(ep, REG_TXDQCURADD, addr);
598 wrw(ep, REG_TXDQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tdesc));
600 /* Transmit status ring. */
601 addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tstat);
602 wrl(ep, REG_TXSTSQBADD, addr);
603 wrl(ep, REG_TXSTSQCURADD, addr);
604 wrw(ep, REG_TXSTSQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tstat));
606 wrl(ep, REG_BMCTL, REG_BMCTL_ENABLE_TX | REG_BMCTL_ENABLE_RX);
607 wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
608 wrl(ep, REG_GIINTMSK, 0);
610 for (i = 0; i < 10; i++) {
611 if ((rdl(ep, REG_BMSTS) & REG_BMSTS_RX_ACTIVE) != 0)
617 printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to start\n");
621 wrl(ep, REG_RXDENQ, RX_QUEUE_ENTRIES);
622 wrl(ep, REG_RXSTSENQ, RX_QUEUE_ENTRIES);
624 wrb(ep, REG_INDAD0, dev->dev_addr[0]);
625 wrb(ep, REG_INDAD1, dev->dev_addr[1]);
626 wrb(ep, REG_INDAD2, dev->dev_addr[2]);
627 wrb(ep, REG_INDAD3, dev->dev_addr[3]);
628 wrb(ep, REG_INDAD4, dev->dev_addr[4]);
629 wrb(ep, REG_INDAD5, dev->dev_addr[5]);
632 wrl(ep, REG_MAXFRMLEN, (MAX_PKT_SIZE << 16) | MAX_PKT_SIZE);
634 wrl(ep, REG_RXCTL, REG_RXCTL_DEFAULT);
635 wrl(ep, REG_TXCTL, REG_TXCTL_ENABLE);
640 static void ep93xx_stop_hw(struct net_device *dev)
642 struct ep93xx_priv *ep = netdev_priv(dev);
645 wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
646 for (i = 0; i < 10; i++) {
647 if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
653 printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
656 static int ep93xx_open(struct net_device *dev)
658 struct ep93xx_priv *ep = netdev_priv(dev);
661 if (ep93xx_alloc_buffers(ep))
664 if (is_zero_ether_addr(dev->dev_addr)) {
665 random_ether_addr(dev->dev_addr);
666 printk(KERN_INFO "%s: generated random MAC address "
667 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
668 dev->dev_addr[0], dev->dev_addr[1],
669 dev->dev_addr[2], dev->dev_addr[3],
670 dev->dev_addr[4], dev->dev_addr[5]);
673 if (ep93xx_start_hw(dev)) {
674 ep93xx_free_buffers(ep);
678 spin_lock_init(&ep->rx_lock);
680 ep->tx_clean_pointer = 0;
682 spin_lock_init(&ep->tx_pending_lock);
685 err = request_irq(ep->irq, ep93xx_irq, IRQF_SHARED, dev->name, dev);
688 ep93xx_free_buffers(ep);
692 wrl(ep, REG_GIINTMSK, REG_GIINTMSK_ENABLE);
694 netif_start_queue(dev);
699 static int ep93xx_close(struct net_device *dev)
701 struct ep93xx_priv *ep = netdev_priv(dev);
703 netif_stop_queue(dev);
705 wrl(ep, REG_GIINTMSK, 0);
706 free_irq(ep->irq, dev);
708 ep93xx_free_buffers(ep);
713 static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
715 struct ep93xx_priv *ep = netdev_priv(dev);
716 struct mii_ioctl_data *data = if_mii(ifr);
718 return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
721 static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
723 struct ep93xx_priv *ep = netdev_priv(dev);
727 wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
729 for (i = 0; i < 10; i++) {
730 if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
736 printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
739 data = rdl(ep, REG_MIIDATA);
745 static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
747 struct ep93xx_priv *ep = netdev_priv(dev);
750 wrl(ep, REG_MIIDATA, data);
751 wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
753 for (i = 0; i < 10; i++) {
754 if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
760 printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
763 static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
765 strcpy(info->driver, DRV_MODULE_NAME);
766 strcpy(info->version, DRV_MODULE_VERSION);
769 static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
771 struct ep93xx_priv *ep = netdev_priv(dev);
772 return mii_ethtool_gset(&ep->mii, cmd);
775 static int ep93xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
777 struct ep93xx_priv *ep = netdev_priv(dev);
778 return mii_ethtool_sset(&ep->mii, cmd);
781 static int ep93xx_nway_reset(struct net_device *dev)
783 struct ep93xx_priv *ep = netdev_priv(dev);
784 return mii_nway_restart(&ep->mii);
787 static u32 ep93xx_get_link(struct net_device *dev)
789 struct ep93xx_priv *ep = netdev_priv(dev);
790 return mii_link_ok(&ep->mii);
793 static struct ethtool_ops ep93xx_ethtool_ops = {
794 .get_drvinfo = ep93xx_get_drvinfo,
795 .get_settings = ep93xx_get_settings,
796 .set_settings = ep93xx_set_settings,
797 .nway_reset = ep93xx_nway_reset,
798 .get_link = ep93xx_get_link,
801 struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
803 struct net_device *dev;
804 struct ep93xx_priv *ep;
806 dev = alloc_etherdev(sizeof(struct ep93xx_priv));
809 ep = netdev_priv(dev);
811 memcpy(dev->dev_addr, data->dev_addr, ETH_ALEN);
813 dev->get_stats = ep93xx_get_stats;
814 dev->ethtool_ops = &ep93xx_ethtool_ops;
815 dev->poll = ep93xx_poll;
816 dev->hard_start_xmit = ep93xx_xmit;
817 dev->open = ep93xx_open;
818 dev->stop = ep93xx_close;
819 dev->do_ioctl = ep93xx_ioctl;
821 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
828 static int ep93xx_eth_remove(struct platform_device *pdev)
830 struct net_device *dev;
831 struct ep93xx_priv *ep;
833 dev = platform_get_drvdata(pdev);
836 platform_set_drvdata(pdev, NULL);
838 ep = netdev_priv(dev);
840 /* @@@ Force down. */
841 unregister_netdev(dev);
842 ep93xx_free_buffers(ep);
844 if (ep->base_addr != NULL)
845 iounmap(ep->base_addr);
847 if (ep->res != NULL) {
848 release_resource(ep->res);
857 static int ep93xx_eth_probe(struct platform_device *pdev)
859 struct ep93xx_eth_data *data;
860 struct net_device *dev;
861 struct ep93xx_priv *ep;
864 data = pdev->dev.platform_data;
868 dev = ep93xx_dev_alloc(data);
873 ep = netdev_priv(dev);
875 platform_set_drvdata(pdev, dev);
877 ep->res = request_mem_region(pdev->resource[0].start,
878 pdev->resource[0].end - pdev->resource[0].start + 1,
880 if (ep->res == NULL) {
881 dev_err(&pdev->dev, "Could not reserve memory region\n");
886 ep->base_addr = ioremap(pdev->resource[0].start,
887 pdev->resource[0].end - pdev->resource[0].start);
888 if (ep->base_addr == NULL) {
889 dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
893 ep->irq = pdev->resource[1].start;
895 ep->mii.phy_id = data->phy_id;
896 ep->mii.phy_id_mask = 0x1f;
897 ep->mii.reg_num_mask = 0x1f;
899 ep->mii.mdio_read = ep93xx_mdio_read;
900 ep->mii.mdio_write = ep93xx_mdio_write;
901 ep->mdc_divisor = 40; /* Max HCLK 100 MHz, min MDIO clk 2.5 MHz. */
903 err = register_netdev(dev);
905 dev_err(&pdev->dev, "Failed to register netdev\n");
909 printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
910 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
911 ep->irq, data->dev_addr[0], data->dev_addr[1],
912 data->dev_addr[2], data->dev_addr[3],
913 data->dev_addr[4], data->dev_addr[5]);
918 ep93xx_eth_remove(pdev);
923 static struct platform_driver ep93xx_eth_driver = {
924 .probe = ep93xx_eth_probe,
925 .remove = ep93xx_eth_remove,
927 .name = "ep93xx-eth",
931 static int __init ep93xx_eth_init_module(void)
933 printk(KERN_INFO DRV_MODULE_NAME " version " DRV_MODULE_VERSION " loading\n");
934 return platform_driver_register(&ep93xx_eth_driver);
937 static void __exit ep93xx_eth_cleanup_module(void)
939 platform_driver_unregister(&ep93xx_eth_driver);
942 module_init(ep93xx_eth_init_module);
943 module_exit(ep93xx_eth_cleanup_module);
944 MODULE_LICENSE("GPL");