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staging: rtl8188eu: Replace function name in string with __func__
[linux/fpc-iii.git] / drivers / net / ethernet / freescale / fs_enet / mac-fec.c
blob1fc27c97e3b23205fe3466ddf9f5bb45f72faf09
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/string.h>
19 #include <linux/ptrace.h>
20 #include <linux/errno.h>
21 #include <linux/ioport.h>
22 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
27 #include <linux/spinlock.h>
28 #include <linux/mii.h>
29 #include <linux/ethtool.h>
30 #include <linux/bitops.h>
31 #include <linux/fs.h>
32 #include <linux/platform_device.h>
33 #include <linux/of_address.h>
34 #include <linux/of_device.h>
35 #include <linux/of_irq.h>
36 #include <linux/gfp.h>
37
38 #include <asm/irq.h>
39 #include <linux/uaccess.h>
40
41 #include "fs_enet.h"
42 #include "fec.h"
43
44 /*************************************************/
45
46 #if defined(CONFIG_CPM1)
47 /* for a CPM1 __raw_xxx's are sufficient */
48 #define __fs_out32(addr, x) __raw_writel(x, addr)
49 #define __fs_out16(addr, x) __raw_writew(x, addr)
50 #define __fs_in32(addr) __raw_readl(addr)
51 #define __fs_in16(addr) __raw_readw(addr)
52 #else
53 /* for others play it safe */
54 #define __fs_out32(addr, x) out_be32(addr, x)
55 #define __fs_out16(addr, x) out_be16(addr, x)
56 #define __fs_in32(addr) in_be32(addr)
57 #define __fs_in16(addr) in_be16(addr)
58 #endif
59
60 /* write */
61 #define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
62
63 /* read */
64 #define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
65
66 /* set bits */
67 #define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
68
69 /* clear bits */
70 #define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
71
72 /*
73 * Delay to wait for FEC reset command to complete (in us)
74 */
75 #define FEC_RESET_DELAY 50
76
77 static int whack_reset(struct fec __iomem *fecp)
78 {
79 int i;
80
81 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
82 for (i = 0; i < FEC_RESET_DELAY; i++) {
83 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
84 return 0; /* OK */
85 udelay(1);
86 }
87
88 return -1;
89 }
90
91 static int do_pd_setup(struct fs_enet_private *fep)
92 {
93 struct platform_device *ofdev = to_platform_device(fep->dev);
94
95 fep->interrupt = irq_of_parse_and_map(ofdev->dev.of_node, 0);
96 if (!fep->interrupt)
97 return -EINVAL;
98
99 fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
100 if (!fep->fcc.fccp)
101 return -EINVAL;
102
103 return 0;
104 }
105
106 #define FEC_NAPI_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_TXF)
107 #define FEC_EVENT (FEC_ENET_RXF | FEC_ENET_TXF)
108 #define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
109 FEC_ENET_BABT | FEC_ENET_EBERR)
110
111 static int setup_data(struct net_device *dev)
112 {
113 struct fs_enet_private *fep = netdev_priv(dev);
114
115 if (do_pd_setup(fep) != 0)
116 return -EINVAL;
117
118 fep->fec.hthi = 0;
119 fep->fec.htlo = 0;
120
121 fep->ev_napi = FEC_NAPI_EVENT_MSK;
122 fep->ev = FEC_EVENT;
123 fep->ev_err = FEC_ERR_EVENT_MSK;
124
125 return 0;
126 }
127
128 static int allocate_bd(struct net_device *dev)
129 {
130 struct fs_enet_private *fep = netdev_priv(dev);
131 const struct fs_platform_info *fpi = fep->fpi;
132
133 fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
134 (fpi->tx_ring + fpi->rx_ring) *
135 sizeof(cbd_t), &fep->ring_mem_addr,
136 GFP_KERNEL);
137 if (fep->ring_base == NULL)
138 return -ENOMEM;
139
140 return 0;
141 }
142
143 static void free_bd(struct net_device *dev)
144 {
145 struct fs_enet_private *fep = netdev_priv(dev);
146 const struct fs_platform_info *fpi = fep->fpi;
147
148 if(fep->ring_base)
149 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
150 * sizeof(cbd_t),
151 (void __force *)fep->ring_base,
152 fep->ring_mem_addr);
153 }
154
155 static void cleanup_data(struct net_device *dev)
156 {
157 /* nothing */
158 }
159
160 static void set_promiscuous_mode(struct net_device *dev)
161 {
162 struct fs_enet_private *fep = netdev_priv(dev);
163 struct fec __iomem *fecp = fep->fec.fecp;
164
165 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
166 }
167
168 static void set_multicast_start(struct net_device *dev)
169 {
170 struct fs_enet_private *fep = netdev_priv(dev);
171
172 fep->fec.hthi = 0;
173 fep->fec.htlo = 0;
174 }
175
176 static void set_multicast_one(struct net_device *dev, const u8 *mac)
177 {
178 struct fs_enet_private *fep = netdev_priv(dev);
179 int temp, hash_index, i, j;
180 u32 crc, csrVal;
181 u8 byte, msb;
182
183 crc = 0xffffffff;
184 for (i = 0; i < 6; i++) {
185 byte = mac[i];
186 for (j = 0; j < 8; j++) {
187 msb = crc >> 31;
188 crc <<= 1;
189 if (msb ^ (byte & 0x1))
190 crc ^= FEC_CRC_POLY;
191 byte >>= 1;
192 }
193 }
194
195 temp = (crc & 0x3f) >> 1;
196 hash_index = ((temp & 0x01) << 4) |
197 ((temp & 0x02) << 2) |
198 ((temp & 0x04)) |
199 ((temp & 0x08) >> 2) |
200 ((temp & 0x10) >> 4);
201 csrVal = 1 << hash_index;
202 if (crc & 1)
203 fep->fec.hthi |= csrVal;
204 else
205 fep->fec.htlo |= csrVal;
206 }
207
208 static void set_multicast_finish(struct net_device *dev)
209 {
210 struct fs_enet_private *fep = netdev_priv(dev);
211 struct fec __iomem *fecp = fep->fec.fecp;
212
213 /* if all multi or too many multicasts; just enable all */
214 if ((dev->flags & IFF_ALLMULTI) != 0 ||
215 netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
216 fep->fec.hthi = 0xffffffffU;
217 fep->fec.htlo = 0xffffffffU;
218 }
219
220 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
221 FW(fecp, grp_hash_table_high, fep->fec.hthi);
222 FW(fecp, grp_hash_table_low, fep->fec.htlo);
223 }
224
225 static void set_multicast_list(struct net_device *dev)
226 {
227 struct netdev_hw_addr *ha;
228
229 if ((dev->flags & IFF_PROMISC) == 0) {
230 set_multicast_start(dev);
231 netdev_for_each_mc_addr(ha, dev)
232 set_multicast_one(dev, ha->addr);
233 set_multicast_finish(dev);
234 } else
235 set_promiscuous_mode(dev);
236 }
237
238 static void restart(struct net_device *dev)
239 {
240 struct fs_enet_private *fep = netdev_priv(dev);
241 struct fec __iomem *fecp = fep->fec.fecp;
242 const struct fs_platform_info *fpi = fep->fpi;
243 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
244 int r;
245 u32 addrhi, addrlo;
246
247 struct mii_bus *mii = dev->phydev->mdio.bus;
248 struct fec_info* fec_inf = mii->priv;
249
250 r = whack_reset(fep->fec.fecp);
251 if (r != 0)
252 dev_err(fep->dev, "FEC Reset FAILED!\n");
253 /*
254 * Set station address.
255 */
256 addrhi = ((u32) dev->dev_addr[0] << 24) |
257 ((u32) dev->dev_addr[1] << 16) |
258 ((u32) dev->dev_addr[2] << 8) |
259 (u32) dev->dev_addr[3];
260 addrlo = ((u32) dev->dev_addr[4] << 24) |
261 ((u32) dev->dev_addr[5] << 16);
262 FW(fecp, addr_low, addrhi);
263 FW(fecp, addr_high, addrlo);
264
265 /*
266 * Reset all multicast.
267 */
268 FW(fecp, grp_hash_table_high, fep->fec.hthi);
269 FW(fecp, grp_hash_table_low, fep->fec.htlo);
270
271 /*
272 * Set maximum receive buffer size.
273 */
274 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
275 #ifdef CONFIG_FS_ENET_MPC5121_FEC
276 FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
277 #else
278 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
279 #endif
280
281 /* get physical address */
282 rx_bd_base_phys = fep->ring_mem_addr;
283 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
284
285 /*
286 * Set receive and transmit descriptor base.
287 */
288 FW(fecp, r_des_start, rx_bd_base_phys);
289 FW(fecp, x_des_start, tx_bd_base_phys);
290
291 fs_init_bds(dev);
292
293 /*
294 * Enable big endian and don't care about SDMA FC.
295 */
296 #ifdef CONFIG_FS_ENET_MPC5121_FEC
297 FS(fecp, dma_control, 0xC0000000);
298 #else
299 FW(fecp, fun_code, 0x78000000);
300 #endif
301
302 /*
303 * Set MII speed.
304 */
305 FW(fecp, mii_speed, fec_inf->mii_speed);
306
307 /*
308 * Clear any outstanding interrupt.
309 */
310 FW(fecp, ievent, 0xffc0);
311 #ifndef CONFIG_FS_ENET_MPC5121_FEC
312 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
313
314 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
315 #else
316 /*
317 * Only set MII/RMII mode - do not touch maximum frame length
318 * configured before.
319 */
320 FS(fecp, r_cntrl, fpi->use_rmii ?
321 FEC_RCNTRL_RMII_MODE : FEC_RCNTRL_MII_MODE);
322 #endif
323 /*
324 * adjust to duplex mode
325 */
326 if (dev->phydev->duplex) {
327 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
328 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
329 } else {
330 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
331 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
332 }
333
334 /* Restore multicast and promiscuous settings */
335 set_multicast_list(dev);
336
337 /*
338 * Enable interrupts we wish to service.
339 */
340 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
341 FEC_ENET_RXF | FEC_ENET_RXB);
342
343 /*
344 * And last, enable the transmit and receive processing.
345 */
346 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
347 FW(fecp, r_des_active, 0x01000000);
348 }
349
350 static void stop(struct net_device *dev)
351 {
352 struct fs_enet_private *fep = netdev_priv(dev);
353 const struct fs_platform_info *fpi = fep->fpi;
354 struct fec __iomem *fecp = fep->fec.fecp;
355
356 struct fec_info *feci = dev->phydev->mdio.bus->priv;
357
358 int i;
359
360 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
361 return; /* already down */
362
363 FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
364 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
365 i < FEC_RESET_DELAY; i++)
366 udelay(1);
367
368 if (i == FEC_RESET_DELAY)
369 dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
370 /*
371 * Disable FEC. Let only MII interrupts.
372 */
373 FW(fecp, imask, 0);
374 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
375
376 fs_cleanup_bds(dev);
377
378 /* shut down FEC1? that's where the mii bus is */
379 if (fpi->has_phy) {
380 FS(fecp, r_cntrl, fpi->use_rmii ?
381 FEC_RCNTRL_RMII_MODE :
382 FEC_RCNTRL_MII_MODE); /* MII/RMII enable */
383 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
384 FW(fecp, ievent, FEC_ENET_MII);
385 FW(fecp, mii_speed, feci->mii_speed);
386 }
387 }
388
389 static void napi_clear_event_fs(struct net_device *dev)
390 {
391 struct fs_enet_private *fep = netdev_priv(dev);
392 struct fec __iomem *fecp = fep->fec.fecp;
393
394 FW(fecp, ievent, FEC_NAPI_EVENT_MSK);
395 }
396
397 static void napi_enable_fs(struct net_device *dev)
398 {
399 struct fs_enet_private *fep = netdev_priv(dev);
400 struct fec __iomem *fecp = fep->fec.fecp;
401
402 FS(fecp, imask, FEC_NAPI_EVENT_MSK);
403 }
404
405 static void napi_disable_fs(struct net_device *dev)
406 {
407 struct fs_enet_private *fep = netdev_priv(dev);
408 struct fec __iomem *fecp = fep->fec.fecp;
409
410 FC(fecp, imask, FEC_NAPI_EVENT_MSK);
411 }
412
413 static void rx_bd_done(struct net_device *dev)
414 {
415 struct fs_enet_private *fep = netdev_priv(dev);
416 struct fec __iomem *fecp = fep->fec.fecp;
417
418 FW(fecp, r_des_active, 0x01000000);
419 }
420
421 static void tx_kickstart(struct net_device *dev)
422 {
423 struct fs_enet_private *fep = netdev_priv(dev);
424 struct fec __iomem *fecp = fep->fec.fecp;
425
426 FW(fecp, x_des_active, 0x01000000);
427 }
428
429 static u32 get_int_events(struct net_device *dev)
430 {
431 struct fs_enet_private *fep = netdev_priv(dev);
432 struct fec __iomem *fecp = fep->fec.fecp;
433
434 return FR(fecp, ievent) & FR(fecp, imask);
435 }
436
437 static void clear_int_events(struct net_device *dev, u32 int_events)
438 {
439 struct fs_enet_private *fep = netdev_priv(dev);
440 struct fec __iomem *fecp = fep->fec.fecp;
441
442 FW(fecp, ievent, int_events);
443 }
444
445 static void ev_error(struct net_device *dev, u32 int_events)
446 {
447 struct fs_enet_private *fep = netdev_priv(dev);
448
449 dev_warn(fep->dev, "FEC ERROR(s) 0x%x\n", int_events);
450 }
451
452 static int get_regs(struct net_device *dev, void *p, int *sizep)
453 {
454 struct fs_enet_private *fep = netdev_priv(dev);
455
456 if (*sizep < sizeof(struct fec))
457 return -EINVAL;
458
459 memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));
460
461 return 0;
462 }
463
464 static int get_regs_len(struct net_device *dev)
465 {
466 return sizeof(struct fec);
467 }
468
469 static void tx_restart(struct net_device *dev)
470 {
471 /* nothing */
472 }
473
474 /*************************************************************************/
475
476 const struct fs_ops fs_fec_ops = {
477 .setup_data = setup_data,
478 .cleanup_data = cleanup_data,
479 .set_multicast_list = set_multicast_list,
480 .restart = restart,
481 .stop = stop,
482 .napi_clear_event = napi_clear_event_fs,
483 .napi_enable = napi_enable_fs,
484 .napi_disable = napi_disable_fs,
485 .rx_bd_done = rx_bd_done,
486 .tx_kickstart = tx_kickstart,
487 .get_int_events = get_int_events,
488 .clear_int_events = clear_int_events,
489 .ev_error = ev_error,
490 .get_regs = get_regs,
491 .get_regs_len = get_regs_len,
492 .tx_restart = tx_restart,
493 .allocate_bd = allocate_bd,
494 .free_bd = free_bd,
495 };
496
Linux with added FPC-III support