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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / fs_enet / mac-fec.c
blobff6839477306fa15c14bee44f350551c888872b5
1 /*
2 * Freescale Ethernet controllers
3 *
4 * Copyright (c) 2005 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
6 *
7 * 2005 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
9 *
10 * This file is licensed under the terms of the GNU General Public License
11 * version 2. This program is licensed "as is" without any warranty of any
12 * kind, whether express or implied.
13 */
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/sched.h>
19 #include <linux/string.h>
20 #include <linux/ptrace.h>
21 #include <linux/errno.h>
22 #include <linux/ioport.h>
23 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/pci.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/skbuff.h>
31 #include <linux/spinlock.h>
32 #include <linux/mii.h>
33 #include <linux/ethtool.h>
34 #include <linux/bitops.h>
35 #include <linux/fs.h>
36 #include <linux/platform_device.h>
37
38 #include <asm/irq.h>
39 #include <asm/uaccess.h>
40
41 #ifdef CONFIG_8xx
42 #include <asm/8xx_immap.h>
43 #include <asm/pgtable.h>
44 #include <asm/mpc8xx.h>
45 #include <asm/commproc.h>
46 #endif
47
48 #include "fs_enet.h"
49 #include "fec.h"
50
51 /*************************************************/
52
53 #if defined(CONFIG_CPM1)
54 /* for a CPM1 __raw_xxx's are sufficient */
55 #define __fs_out32(addr, x) __raw_writel(x, addr)
56 #define __fs_out16(addr, x) __raw_writew(x, addr)
57 #define __fs_in32(addr) __raw_readl(addr)
58 #define __fs_in16(addr) __raw_readw(addr)
59 #else
60 /* for others play it safe */
61 #define __fs_out32(addr, x) out_be32(addr, x)
62 #define __fs_out16(addr, x) out_be16(addr, x)
63 #define __fs_in32(addr) in_be32(addr)
64 #define __fs_in16(addr) in_be16(addr)
65 #endif
66
67 /* write */
68 #define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
69
70 /* read */
71 #define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
72
73 /* set bits */
74 #define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
75
76 /* clear bits */
77 #define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
78
79 /*
80 * Delay to wait for FEC reset command to complete (in us)
81 */
82 #define FEC_RESET_DELAY 50
83
84 static int whack_reset(fec_t * fecp)
85 {
86 int i;
87
88 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
89 for (i = 0; i < FEC_RESET_DELAY; i++) {
90 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
91 return 0; /* OK */
92 udelay(1);
93 }
94
95 return -1;
96 }
97
98 static int do_pd_setup(struct fs_enet_private *fep)
99 {
100 struct platform_device *pdev = to_platform_device(fep->dev);
101 struct resource *r;
102
103 /* Fill out IRQ field */
104 fep->interrupt = platform_get_irq_byname(pdev,"interrupt");
105 if (fep->interrupt < 0)
106 return -EINVAL;
107
108 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
109 fep->fec.fecp = ioremap(r->start, r->end - r->start + 1);
110
111 if(fep->fec.fecp == NULL)
112 return -EINVAL;
113
114 return 0;
115
116 }
117
118 #define FEC_NAPI_RX_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB)
119 #define FEC_RX_EVENT (FEC_ENET_RXF)
120 #define FEC_TX_EVENT (FEC_ENET_TXF)
121 #define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
122 FEC_ENET_BABT | FEC_ENET_EBERR)
123
124 static int setup_data(struct net_device *dev)
125 {
126 struct fs_enet_private *fep = netdev_priv(dev);
127
128 if (do_pd_setup(fep) != 0)
129 return -EINVAL;
130
131 fep->fec.hthi = 0;
132 fep->fec.htlo = 0;
133
134 fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
135 fep->ev_rx = FEC_RX_EVENT;
136 fep->ev_tx = FEC_TX_EVENT;
137 fep->ev_err = FEC_ERR_EVENT_MSK;
138
139 return 0;
140 }
141
142 static int allocate_bd(struct net_device *dev)
143 {
144 struct fs_enet_private *fep = netdev_priv(dev);
145 const struct fs_platform_info *fpi = fep->fpi;
146
147 fep->ring_base = dma_alloc_coherent(fep->dev,
148 (fpi->tx_ring + fpi->rx_ring) *
149 sizeof(cbd_t), &fep->ring_mem_addr,
150 GFP_KERNEL);
151 if (fep->ring_base == NULL)
152 return -ENOMEM;
153
154 return 0;
155 }
156
157 static void free_bd(struct net_device *dev)
158 {
159 struct fs_enet_private *fep = netdev_priv(dev);
160 const struct fs_platform_info *fpi = fep->fpi;
161
162 if(fep->ring_base)
163 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
164 * sizeof(cbd_t),
165 fep->ring_base,
166 fep->ring_mem_addr);
167 }
168
169 static void cleanup_data(struct net_device *dev)
170 {
171 /* nothing */
172 }
173
174 static void set_promiscuous_mode(struct net_device *dev)
175 {
176 struct fs_enet_private *fep = netdev_priv(dev);
177 fec_t *fecp = fep->fec.fecp;
178
179 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
180 }
181
182 static void set_multicast_start(struct net_device *dev)
183 {
184 struct fs_enet_private *fep = netdev_priv(dev);
185
186 fep->fec.hthi = 0;
187 fep->fec.htlo = 0;
188 }
189
190 static void set_multicast_one(struct net_device *dev, const u8 *mac)
191 {
192 struct fs_enet_private *fep = netdev_priv(dev);
193 int temp, hash_index, i, j;
194 u32 crc, csrVal;
195 u8 byte, msb;
196
197 crc = 0xffffffff;
198 for (i = 0; i < 6; i++) {
199 byte = mac[i];
200 for (j = 0; j < 8; j++) {
201 msb = crc >> 31;
202 crc <<= 1;
203 if (msb ^ (byte & 0x1))
204 crc ^= FEC_CRC_POLY;
205 byte >>= 1;
206 }
207 }
208
209 temp = (crc & 0x3f) >> 1;
210 hash_index = ((temp & 0x01) << 4) |
211 ((temp & 0x02) << 2) |
212 ((temp & 0x04)) |
213 ((temp & 0x08) >> 2) |
214 ((temp & 0x10) >> 4);
215 csrVal = 1 << hash_index;
216 if (crc & 1)
217 fep->fec.hthi |= csrVal;
218 else
219 fep->fec.htlo |= csrVal;
220 }
221
222 static void set_multicast_finish(struct net_device *dev)
223 {
224 struct fs_enet_private *fep = netdev_priv(dev);
225 fec_t *fecp = fep->fec.fecp;
226
227 /* if all multi or too many multicasts; just enable all */
228 if ((dev->flags & IFF_ALLMULTI) != 0 ||
229 dev->mc_count > FEC_MAX_MULTICAST_ADDRS) {
230 fep->fec.hthi = 0xffffffffU;
231 fep->fec.htlo = 0xffffffffU;
232 }
233
234 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
235 FW(fecp, hash_table_high, fep->fec.hthi);
236 FW(fecp, hash_table_low, fep->fec.htlo);
237 }
238
239 static void set_multicast_list(struct net_device *dev)
240 {
241 struct dev_mc_list *pmc;
242
243 if ((dev->flags & IFF_PROMISC) == 0) {
244 set_multicast_start(dev);
245 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
246 set_multicast_one(dev, pmc->dmi_addr);
247 set_multicast_finish(dev);
248 } else
249 set_promiscuous_mode(dev);
250 }
251
252 static void restart(struct net_device *dev)
253 {
254 #ifdef CONFIG_DUET
255 immap_t *immap = fs_enet_immap;
256 u32 cptr;
257 #endif
258 struct fs_enet_private *fep = netdev_priv(dev);
259 fec_t *fecp = fep->fec.fecp;
260 const struct fs_platform_info *fpi = fep->fpi;
261 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
262 int r;
263 u32 addrhi, addrlo;
264
265 struct mii_bus* mii = fep->phydev->bus;
266 struct fec_info* fec_inf = mii->priv;
267
268 r = whack_reset(fep->fec.fecp);
269 if (r != 0)
270 printk(KERN_ERR DRV_MODULE_NAME
271 ": %s FEC Reset FAILED!\n", dev->name);
272 /*
273 * Set station address.
274 */
275 addrhi = ((u32) dev->dev_addr[0] << 24) |
276 ((u32) dev->dev_addr[1] << 16) |
277 ((u32) dev->dev_addr[2] << 8) |
278 (u32) dev->dev_addr[3];
279 addrlo = ((u32) dev->dev_addr[4] << 24) |
280 ((u32) dev->dev_addr[5] << 16);
281 FW(fecp, addr_low, addrhi);
282 FW(fecp, addr_high, addrlo);
283
284 /*
285 * Reset all multicast.
286 */
287 FW(fecp, hash_table_high, fep->fec.hthi);
288 FW(fecp, hash_table_low, fep->fec.htlo);
289
290 /*
291 * Set maximum receive buffer size.
292 */
293 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
294 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
295
296 /* get physical address */
297 rx_bd_base_phys = fep->ring_mem_addr;
298 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
299
300 /*
301 * Set receive and transmit descriptor base.
302 */
303 FW(fecp, r_des_start, rx_bd_base_phys);
304 FW(fecp, x_des_start, tx_bd_base_phys);
305
306 fs_init_bds(dev);
307
308 /*
309 * Enable big endian and don't care about SDMA FC.
310 */
311 FW(fecp, fun_code, 0x78000000);
312
313 /*
314 * Set MII speed.
315 */
316 FW(fecp, mii_speed, fec_inf->mii_speed);
317
318 /*
319 * Clear any outstanding interrupt.
320 */
321 FW(fecp, ievent, 0xffc0);
322 #ifndef CONFIG_PPC_MERGE
323 FW(fecp, ivec, (fep->interrupt / 2) << 29);
324 #else
325 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
326 #endif
327
328 /*
329 * adjust to speed (only for DUET & RMII)
330 */
331 #ifdef CONFIG_DUET
332 if (fpi->use_rmii) {
333 cptr = in_be32(&immap->im_cpm.cp_cptr);
334 switch (fs_get_fec_index(fpi->fs_no)) {
335 case 0:
336 cptr |= 0x100;
337 if (fep->speed == 10)
338 cptr |= 0x0000010;
339 else if (fep->speed == 100)
340 cptr &= ~0x0000010;
341 break;
342 case 1:
343 cptr |= 0x80;
344 if (fep->speed == 10)
345 cptr |= 0x0000008;
346 else if (fep->speed == 100)
347 cptr &= ~0x0000008;
348 break;
349 default:
350 BUG(); /* should never happen */
351 break;
352 }
353 out_be32(&immap->im_cpm.cp_cptr, cptr);
354 }
355 #endif
356
357
358 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
359 /*
360 * adjust to duplex mode
361 */
362 if (fep->phydev->duplex) {
363 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
364 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
365 } else {
366 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
367 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
368 }
369
370 /*
371 * Enable interrupts we wish to service.
372 */
373 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
374 FEC_ENET_RXF | FEC_ENET_RXB);
375
376 /*
377 * And last, enable the transmit and receive processing.
378 */
379 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
380 FW(fecp, r_des_active, 0x01000000);
381 }
382
383 static void stop(struct net_device *dev)
384 {
385 struct fs_enet_private *fep = netdev_priv(dev);
386 const struct fs_platform_info *fpi = fep->fpi;
387 fec_t *fecp = fep->fec.fecp;
388
389 struct fec_info* feci= fep->phydev->bus->priv;
390
391 int i;
392
393 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
394 return; /* already down */
395
396 FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
397 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
398 i < FEC_RESET_DELAY; i++)
399 udelay(1);
400
401 if (i == FEC_RESET_DELAY)
402 printk(KERN_WARNING DRV_MODULE_NAME
403 ": %s FEC timeout on graceful transmit stop\n",
404 dev->name);
405 /*
406 * Disable FEC. Let only MII interrupts.
407 */
408 FW(fecp, imask, 0);
409 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
410
411 fs_cleanup_bds(dev);
412
413 /* shut down FEC1? that's where the mii bus is */
414 if (fpi->has_phy) {
415 FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
416 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
417 FW(fecp, ievent, FEC_ENET_MII);
418 FW(fecp, mii_speed, feci->mii_speed);
419 }
420 }
421
422 static void pre_request_irq(struct net_device *dev, int irq)
423 {
424 #ifndef CONFIG_PPC_MERGE
425 immap_t *immap = fs_enet_immap;
426 u32 siel;
427
428 /* SIU interrupt */
429 if (irq >= SIU_IRQ0 && irq < SIU_LEVEL7) {
430
431 siel = in_be32(&immap->im_siu_conf.sc_siel);
432 if ((irq & 1) == 0)
433 siel |= (0x80000000 >> irq);
434 else
435 siel &= ~(0x80000000 >> (irq & ~1));
436 out_be32(&immap->im_siu_conf.sc_siel, siel);
437 }
438 #endif
439 }
440
441 static void post_free_irq(struct net_device *dev, int irq)
442 {
443 /* nothing */
444 }
445
446 static void napi_clear_rx_event(struct net_device *dev)
447 {
448 struct fs_enet_private *fep = netdev_priv(dev);
449 fec_t *fecp = fep->fec.fecp;
450
451 FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
452 }
453
454 static void napi_enable_rx(struct net_device *dev)
455 {
456 struct fs_enet_private *fep = netdev_priv(dev);
457 fec_t *fecp = fep->fec.fecp;
458
459 FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
460 }
461
462 static void napi_disable_rx(struct net_device *dev)
463 {
464 struct fs_enet_private *fep = netdev_priv(dev);
465 fec_t *fecp = fep->fec.fecp;
466
467 FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
468 }
469
470 static void rx_bd_done(struct net_device *dev)
471 {
472 struct fs_enet_private *fep = netdev_priv(dev);
473 fec_t *fecp = fep->fec.fecp;
474
475 FW(fecp, r_des_active, 0x01000000);
476 }
477
478 static void tx_kickstart(struct net_device *dev)
479 {
480 struct fs_enet_private *fep = netdev_priv(dev);
481 fec_t *fecp = fep->fec.fecp;
482
483 FW(fecp, x_des_active, 0x01000000);
484 }
485
486 static u32 get_int_events(struct net_device *dev)
487 {
488 struct fs_enet_private *fep = netdev_priv(dev);
489 fec_t *fecp = fep->fec.fecp;
490
491 return FR(fecp, ievent) & FR(fecp, imask);
492 }
493
494 static void clear_int_events(struct net_device *dev, u32 int_events)
495 {
496 struct fs_enet_private *fep = netdev_priv(dev);
497 fec_t *fecp = fep->fec.fecp;
498
499 FW(fecp, ievent, int_events);
500 }
501
502 static void ev_error(struct net_device *dev, u32 int_events)
503 {
504 printk(KERN_WARNING DRV_MODULE_NAME
505 ": %s FEC ERROR(s) 0x%x\n", dev->name, int_events);
506 }
507
508 int get_regs(struct net_device *dev, void *p, int *sizep)
509 {
510 struct fs_enet_private *fep = netdev_priv(dev);
511
512 if (*sizep < sizeof(fec_t))
513 return -EINVAL;
514
515 memcpy_fromio(p, fep->fec.fecp, sizeof(fec_t));
516
517 return 0;
518 }
519
520 int get_regs_len(struct net_device *dev)
521 {
522 return sizeof(fec_t);
523 }
524
525 void tx_restart(struct net_device *dev)
526 {
527 /* nothing */
528 }
529
530 /*************************************************************************/
531
532 const struct fs_ops fs_fec_ops = {
533 .setup_data = setup_data,
534 .cleanup_data = cleanup_data,
535 .set_multicast_list = set_multicast_list,
536 .restart = restart,
537 .stop = stop,
538 .pre_request_irq = pre_request_irq,
539 .post_free_irq = post_free_irq,
540 .napi_clear_rx_event = napi_clear_rx_event,
541 .napi_enable_rx = napi_enable_rx,
542 .napi_disable_rx = napi_disable_rx,
543 .rx_bd_done = rx_bd_done,
544 .tx_kickstart = tx_kickstart,
545 .get_int_events = get_int_events,
546 .clear_int_events = clear_int_events,
547 .ev_error = ev_error,
548 .get_regs = get_regs,
549 .get_regs_len = get_regs_len,
550 .tx_restart = tx_restart,
551 .allocate_bd = allocate_bd,
552 .free_bd = free_bd,
553 };
554
Linux with added FPC-III support