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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>
37#include <mach/eth.h>
38
39
40#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3))
41#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3))
42
43#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3))
44
45#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3))
46
47
48#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3))
49
50
51#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3))
52
53#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3))
54
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
95#define INTERNAL_PHY_ADR 0x1c
96
97struct netx_eth_priv {
98 void __iomem *sram_base, *xpec_base, *xmac_base;
99 int id;
100 struct mii_if_info mii;
101 u32 msg_enable;
102 struct xc *xc;
103 spinlock_t lock;
104};
105
106static void netx_eth_set_multicast_list(struct net_device *ndev)
107{
108
109}
110
111static int
112netx_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
140static 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;
150 seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
151 len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_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
174static irqreturn_t
175netx_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 =
194 readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
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
210static 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,
222 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
223 writel(ndev->dev_addr[4] |
224 ndev->dev_addr[5]<<8,
225 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
226
227 writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
228 LOCAL_CONFIG_CON_LO_IRQ_EN |
229 LOCAL_CONFIG_CON_HI_IRQ_EN |
230 LOCAL_CONFIG_IND_LO_IRQ_EN |
231 LOCAL_CONFIG_IND_HI_IRQ_EN,
232 priv->xpec_base + NETX_XPEC_RAM_START_OFS +
233 ETH_MAC_LOCAL_CONFIG);
234
235 mii_check_media(&priv->mii, netif_msg_link(priv), 1);
236 netif_start_queue(ndev);
237
238 return 0;
239}
240
241static 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,
248 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
249
250 free_irq(ndev->irq, ndev);
251
252 return 0;
253}
254
255static 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
276static int
277netx_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) |
282 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
283
284 writel(val, NETX_MIIMU);
285 while (readl(NETX_MIIMU) & MIIMU_SNRDY);
286
287 return readl(NETX_MIIMU) >> 16;
288
289}
290
291static void
292netx_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) |
297 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
298 MIIMU_DATA(value);
299
300 writel(val, NETX_MIIMU);
301 while (readl(NETX_MIIMU) & MIIMU_SNRDY);
302}
303
304static 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
315static 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
340
341
342 if (running) {
343
344 mac4321 = readl(priv->xpec_base +
345 NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
346 mac65 = readl(priv->xpec_base +
347 NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
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
377static int netx_eth_drv_probe(struct platform_device *pdev)
378{
379 struct netx_eth_priv *priv;
380 struct net_device *ndev;
381 struct netxeth_platform_data *pdata;
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;
422exit_free_pfifo:
423 pfifo_free(PFIFO_MASK(priv->id));
424exit_free_xc:
425 free_xc(priv->xc);
426exit_free_netdev:
427 platform_set_drvdata(pdev, NULL);
428 free_netdev(ndev);
429exit:
430 return ret;
431}
432
433static 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
449static 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
455static int netx_eth_drv_resume(struct platform_device *pdev)
456{
457 dev_err(&pdev->dev, "resume not implemented\n");
458 return 0;
459}
460
461static 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
472static 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) |
479 PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
480 PHY_CONTROL_PHY1_AUTOMDIX |
481 PHY_CONTROL_PHY1_EN |
482 PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
483 PHY_CONTROL_PHY0_AUTOMDIX |
484 PHY_CONTROL_PHY0_EN |
485 PHY_CONTROL_CLK_XLATIN;
486
487 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
488 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
489
490 writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
491 udelay(100);
492
493 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
494 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
495
496 writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
497
498 return platform_driver_register(&netx_eth_driver);
499}
500
501static void __exit netx_eth_cleanup(void)
502{
503 platform_driver_unregister(&netx_eth_driver);
504}
505
506module_init(netx_eth_init);
507module_exit(netx_eth_cleanup);
508
509MODULE_AUTHOR("Sascha Hauer, Pengutronix");
510MODULE_LICENSE("GPL");
511MODULE_ALIAS("platform:" CARDNAME);
512MODULE_FIRMWARE("xc0.bin");
513MODULE_FIRMWARE("xc1.bin");
514MODULE_FIRMWARE("xc2.bin");
515
