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netx-eth.c
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1 /*
2  * drivers/net/ethernet/netx-eth.c
3  *
4  * Copyright (c) 2005 Sascha Hauer <[email protected]>, Pengutronix
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
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  */
19 
20 #include <linux/init.h>
21 #include <linux/interrupt.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 
26 #include <linux/netdevice.h>
27 #include <linux/platform_device.h>
28 #include <linux/etherdevice.h>
29 #include <linux/skbuff.h>
30 #include <linux/mii.h>
31 
32 #include <asm/io.h>
33 #include <mach/hardware.h>
34 #include <mach/netx-regs.h>
35 #include <mach/pfifo.h>
36 #include <mach/xc.h>
38 
39 /* XC Fifo Offsets */
40 #define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
41 #define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
42  /* Data packages are indicated by XC */
43 #define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
44  /* Data packages are indicated by XC */
45 #define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
46  /* have to be indicated by ARM which */
47  /* shall be sent */
48 #define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
49  /* have to be indicated by ARM which shall */
50  /* be sent */
51 #define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
52  /* are confirmed */
53 #define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
54  /* packages are confirmed */
55 #define PFIFO_MASK(xcno) (0x7f << (xcno*8))
56 
57 #define FIFO_PTR_FRAMELEN_SHIFT 0
58 #define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
59 #define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
60 #define FIFO_PTR_TIMETRIG (1<<11)
61 #define FIFO_PTR_MULTI_REQ
62 #define FIFO_PTR_ORIGIN (1<<14)
63 #define FIFO_PTR_VLAN (1<<15)
64 #define FIFO_PTR_FRAMENO_SHIFT 16
65 #define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
66 #define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
67 #define FIFO_PTR_SEGMENT_SHIFT 22
68 #define FIFO_PTR_SEGMENT_MASK (0xf << 22)
69 #define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
70 #define FIFO_PTR_ERROR_SHIFT 28
71 #define FIFO_PTR_ERROR_MASK (0xf << 28)
72 
73 #define ISR_LINK_STATUS_CHANGE (1<<4)
74 #define ISR_IND_LO (1<<3)
75 #define ISR_CON_LO (1<<2)
76 #define ISR_IND_HI (1<<1)
77 #define ISR_CON_HI (1<<0)
78 
79 #define ETH_MAC_LOCAL_CONFIG 0x1560
80 #define ETH_MAC_4321 0x1564
81 #define ETH_MAC_65 0x1568
82 
83 #define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
84 #define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
85 #define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
86 #define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
87 #define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
88 #define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
89 #define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
90 #define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
91 
92 #define CARDNAME "netx-eth"
93 
94 /* LSB must be zero */
95 #define INTERNAL_PHY_ADR 0x1c
96 
97 struct netx_eth_priv {
99  int id;
100  struct mii_if_info mii;
102  struct xc *xc;
104 };
105 
106 static void netx_eth_set_multicast_list(struct net_device *ndev)
107 {
108  /* implement me */
109 }
110 
111 static int
112 netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
113 {
114  struct netx_eth_priv *priv = netdev_priv(ndev);
115  unsigned char *buf = skb->data;
116  unsigned int len = skb->len;
117 
118  spin_lock_irq(&priv->lock);
119  memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
120  if (len < 60) {
121  memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
122  len = 60;
123  }
124 
125  pfifo_push(REQ_FIFO_PORT_LO(priv->id),
126  FIFO_PTR_SEGMENT(priv->id) |
127  FIFO_PTR_FRAMENO(1) |
128  FIFO_PTR_FRAMELEN(len));
129 
130  ndev->stats.tx_packets++;
131  ndev->stats.tx_bytes += skb->len;
132 
133  netif_stop_queue(ndev);
134  spin_unlock_irq(&priv->lock);
135  dev_kfree_skb(skb);
136 
137  return NETDEV_TX_OK;
138 }
139 
140 static void netx_eth_receive(struct net_device *ndev)
141 {
142  struct netx_eth_priv *priv = netdev_priv(ndev);
143  unsigned int val, frameno, seg, len;
144  unsigned char *data;
145  struct sk_buff *skb;
146 
147  val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
148 
149  frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
152 
153  skb = netdev_alloc_skb(ndev, len);
154  if (unlikely(skb == NULL)) {
155  printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
156  ndev->name);
157  ndev->stats.rx_dropped++;
158  return;
159  }
160 
161  data = skb_put(skb, len);
162 
163  memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
164 
165  pfifo_push(EMPTY_PTR_FIFO(priv->id),
166  FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
167 
168  skb->protocol = eth_type_trans(skb, ndev);
169  netif_rx(skb);
170  ndev->stats.rx_packets++;
171  ndev->stats.rx_bytes += len;
172 }
173 
174 static irqreturn_t
175 netx_eth_interrupt(int irq, void *dev_id)
176 {
177  struct net_device *ndev = dev_id;
178  struct netx_eth_priv *priv = netdev_priv(ndev);
179  int status;
180  unsigned long flags;
181 
182  spin_lock_irqsave(&priv->lock, flags);
183 
184  status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
185  while (status) {
186  int fill_level;
187  writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
188 
189  if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
190  printk("%s: unexpected status: 0x%08x\n",
191  __func__, status);
192 
193  fill_level =
195  while (fill_level--)
196  netx_eth_receive(ndev);
197 
198  if (status & ISR_CON_LO)
199  netif_wake_queue(ndev);
200 
201  if (status & ISR_LINK_STATUS_CHANGE)
202  mii_check_media(&priv->mii, netif_msg_link(priv), 1);
203 
204  status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
205  }
206  spin_unlock_irqrestore(&priv->lock, flags);
207  return IRQ_HANDLED;
208 }
209 
210 static int netx_eth_open(struct net_device *ndev)
211 {
212  struct netx_eth_priv *priv = netdev_priv(ndev);
213 
214  if (request_irq
215  (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
216  return -EAGAIN;
217 
218  writel(ndev->dev_addr[0] |
219  ndev->dev_addr[1]<<8 |
220  ndev->dev_addr[2]<<16 |
221  ndev->dev_addr[3]<<24,
223  writel(ndev->dev_addr[4] |
224  ndev->dev_addr[5]<<8,
226 
234 
235  mii_check_media(&priv->mii, netif_msg_link(priv), 1);
236  netif_start_queue(ndev);
237 
238  return 0;
239 }
240 
241 static int netx_eth_close(struct net_device *ndev)
242 {
243  struct netx_eth_priv *priv = netdev_priv(ndev);
244 
245  netif_stop_queue(ndev);
246 
247  writel(0,
249 
250  free_irq(ndev->irq, ndev);
251 
252  return 0;
253 }
254 
255 static void netx_eth_timeout(struct net_device *ndev)
256 {
257  struct netx_eth_priv *priv = netdev_priv(ndev);
258  int i;
259 
260  printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
261 
262  spin_lock_irq(&priv->lock);
263 
264  xc_reset(priv->xc);
265  xc_start(priv->xc);
266 
267  for (i=2; i<=18; i++)
268  pfifo_push(EMPTY_PTR_FIFO(priv->id),
269  FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
270 
271  spin_unlock_irq(&priv->lock);
272 
273  netif_wake_queue(ndev);
274 }
275 
276 static int
277 netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
278 {
279  unsigned int val;
280 
281  val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
283 
284  writel(val, NETX_MIIMU);
285  while (readl(NETX_MIIMU) & MIIMU_SNRDY);
286 
287  return readl(NETX_MIIMU) >> 16;
288 
289 }
290 
291 static void
292 netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
293 {
294  unsigned int val;
295 
296  val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
298  MIIMU_DATA(value);
299 
300  writel(val, NETX_MIIMU);
301  while (readl(NETX_MIIMU) & MIIMU_SNRDY);
302 }
303 
304 static const struct net_device_ops netx_eth_netdev_ops = {
305  .ndo_open = netx_eth_open,
306  .ndo_stop = netx_eth_close,
307  .ndo_start_xmit = netx_eth_hard_start_xmit,
308  .ndo_tx_timeout = netx_eth_timeout,
309  .ndo_set_rx_mode = netx_eth_set_multicast_list,
310  .ndo_change_mtu = eth_change_mtu,
311  .ndo_validate_addr = eth_validate_addr,
312  .ndo_set_mac_address = eth_mac_addr,
313 };
314 
315 static int netx_eth_enable(struct net_device *ndev)
316 {
317  struct netx_eth_priv *priv = netdev_priv(ndev);
318  unsigned int mac4321, mac65;
319  int running, i;
320 
321  ether_setup(ndev);
322 
323  ndev->netdev_ops = &netx_eth_netdev_ops;
324  ndev->watchdog_timeo = msecs_to_jiffies(5000);
325 
326  priv->msg_enable = NETIF_MSG_LINK;
327  priv->mii.phy_id_mask = 0x1f;
328  priv->mii.reg_num_mask = 0x1f;
329  priv->mii.force_media = 0;
330  priv->mii.full_duplex = 0;
331  priv->mii.dev = ndev;
332  priv->mii.mdio_read = netx_eth_phy_read;
333  priv->mii.mdio_write = netx_eth_phy_write;
334  priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
335 
336  running = xc_running(priv->xc);
337  xc_stop(priv->xc);
338 
339  /* if the xc engine is already running, assume the bootloader has
340  * loaded the firmware for us
341  */
342  if (running) {
343  /* get Node Address from hardware */
344  mac4321 = readl(priv->xpec_base +
346  mac65 = readl(priv->xpec_base +
348 
349  ndev->dev_addr[0] = mac4321 & 0xff;
350  ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
351  ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
352  ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
353  ndev->dev_addr[4] = mac65 & 0xff;
354  ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
355  } else {
356  if (xc_request_firmware(priv->xc)) {
357  printk(CARDNAME ": requesting firmware failed\n");
358  return -ENODEV;
359  }
360  }
361 
362  xc_reset(priv->xc);
363  xc_start(priv->xc);
364 
365  if (!is_valid_ether_addr(ndev->dev_addr))
366  printk("%s: Invalid ethernet MAC address. Please "
367  "set using ifconfig\n", ndev->name);
368 
369  for (i=2; i<=18; i++)
370  pfifo_push(EMPTY_PTR_FIFO(priv->id),
371  FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
372 
373  return register_netdev(ndev);
374 
375 }
376 
377 static int netx_eth_drv_probe(struct platform_device *pdev)
378 {
379  struct netx_eth_priv *priv;
380  struct net_device *ndev;
382  int ret;
383 
384  ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
385  if (!ndev) {
386  ret = -ENOMEM;
387  goto exit;
388  }
389  SET_NETDEV_DEV(ndev, &pdev->dev);
390 
391  platform_set_drvdata(pdev, ndev);
392 
393  priv = netdev_priv(ndev);
394 
395  pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
396  priv->xc = request_xc(pdata->xcno, &pdev->dev);
397  if (!priv->xc) {
398  dev_err(&pdev->dev, "unable to request xc engine\n");
399  ret = -ENODEV;
400  goto exit_free_netdev;
401  }
402 
403  ndev->irq = priv->xc->irq;
404  priv->id = pdev->id;
405  priv->xpec_base = priv->xc->xpec_base;
406  priv->xmac_base = priv->xc->xmac_base;
407  priv->sram_base = priv->xc->sram_base;
408 
409  spin_lock_init(&priv->lock);
410 
411  ret = pfifo_request(PFIFO_MASK(priv->id));
412  if (ret) {
413  printk("unable to request PFIFO\n");
414  goto exit_free_xc;
415  }
416 
417  ret = netx_eth_enable(ndev);
418  if (ret)
419  goto exit_free_pfifo;
420 
421  return 0;
422 exit_free_pfifo:
423  pfifo_free(PFIFO_MASK(priv->id));
424 exit_free_xc:
425  free_xc(priv->xc);
426 exit_free_netdev:
427  platform_set_drvdata(pdev, NULL);
428  free_netdev(ndev);
429 exit:
430  return ret;
431 }
432 
433 static int netx_eth_drv_remove(struct platform_device *pdev)
434 {
435  struct net_device *ndev = dev_get_drvdata(&pdev->dev);
436  struct netx_eth_priv *priv = netdev_priv(ndev);
437 
438  platform_set_drvdata(pdev, NULL);
439 
440  unregister_netdev(ndev);
441  xc_stop(priv->xc);
442  free_xc(priv->xc);
443  free_netdev(ndev);
444  pfifo_free(PFIFO_MASK(priv->id));
445 
446  return 0;
447 }
448 
449 static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
450 {
451  dev_err(&pdev->dev, "suspend not implemented\n");
452  return 0;
453 }
454 
455 static int netx_eth_drv_resume(struct platform_device *pdev)
456 {
457  dev_err(&pdev->dev, "resume not implemented\n");
458  return 0;
459 }
460 
461 static struct platform_driver netx_eth_driver = {
462  .probe = netx_eth_drv_probe,
463  .remove = netx_eth_drv_remove,
464  .suspend = netx_eth_drv_suspend,
465  .resume = netx_eth_drv_resume,
466  .driver = {
467  .name = CARDNAME,
468  .owner = THIS_MODULE,
469  },
470 };
471 
472 static int __init netx_eth_init(void)
473 {
474  unsigned int phy_control, val;
475 
476  printk("NetX Ethernet driver\n");
477 
478  phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
486 
489 
491  udelay(100);
492 
495 
496  writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
497 
498  return platform_driver_register(&netx_eth_driver);
499 }
500 
501 static void __exit netx_eth_cleanup(void)
502 {
503  platform_driver_unregister(&netx_eth_driver);
504 }
505 
506 module_init(netx_eth_init);
507 module_exit(netx_eth_cleanup);
508 
509 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
510 MODULE_LICENSE("GPL");
511 MODULE_ALIAS("platform:" CARDNAME);
512 MODULE_FIRMWARE("xc0.bin");
513 MODULE_FIRMWARE("xc1.bin");
514 MODULE_FIRMWARE("xc2.bin");