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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 <asm/uaccess.h>
40
41#ifdef CONFIG_8xx
42#include <asm/8xx_immap.h>
43#include <asm/pgtable.h>
44#include <asm/cpm1.h>
45#endif
46
47#include "fs_enet.h"
48#include "fec.h"
49
50
51
52#if defined(CONFIG_CPM1)
53
54#define __fs_out32(addr, x) __raw_writel(x, addr)
55#define __fs_out16(addr, x) __raw_writew(x, addr)
56#define __fs_in32(addr) __raw_readl(addr)
57#define __fs_in16(addr) __raw_readw(addr)
58#else
59
60#define __fs_out32(addr, x) out_be32(addr, x)
61#define __fs_out16(addr, x) out_be16(addr, x)
62#define __fs_in32(addr) in_be32(addr)
63#define __fs_in16(addr) in_be16(addr)
64#endif
65
66
67#define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
68
69
70#define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
71
72
73#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
74
75
76#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
77
78
79
80
81#define FEC_RESET_DELAY 50
82
83static int whack_reset(struct fec __iomem *fecp)
84{
85 int i;
86
87 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
88 for (i = 0; i < FEC_RESET_DELAY; i++) {
89 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
90 return 0;
91 udelay(1);
92 }
93
94 return -1;
95}
96
97static int do_pd_setup(struct fs_enet_private *fep)
98{
99 struct platform_device *ofdev = to_platform_device(fep->dev);
100
101 fep->interrupt = irq_of_parse_and_map(ofdev->dev.of_node, 0);
102 if (!fep->interrupt)
103 return -EINVAL;
104
105 fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
106 if (!fep->fcc.fccp)
107 return -EINVAL;
108
109 return 0;
110}
111
112#define FEC_NAPI_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_TXF)
113#define FEC_EVENT (FEC_ENET_RXF | FEC_ENET_TXF)
114#define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
115 FEC_ENET_BABT | FEC_ENET_EBERR)
116
117static int setup_data(struct net_device *dev)
118{
119 struct fs_enet_private *fep = netdev_priv(dev);
120
121 if (do_pd_setup(fep) != 0)
122 return -EINVAL;
123
124 fep->fec.hthi = 0;
125 fep->fec.htlo = 0;
126
127 fep->ev_napi = FEC_NAPI_EVENT_MSK;
128 fep->ev = FEC_EVENT;
129 fep->ev_err = FEC_ERR_EVENT_MSK;
130
131 return 0;
132}
133
134static int allocate_bd(struct net_device *dev)
135{
136 struct fs_enet_private *fep = netdev_priv(dev);
137 const struct fs_platform_info *fpi = fep->fpi;
138
139 fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
140 (fpi->tx_ring + fpi->rx_ring) *
141 sizeof(cbd_t), &fep->ring_mem_addr,
142 GFP_KERNEL);
143 if (fep->ring_base == NULL)
144 return -ENOMEM;
145
146 return 0;
147}
148
149static void free_bd(struct net_device *dev)
150{
151 struct fs_enet_private *fep = netdev_priv(dev);
152 const struct fs_platform_info *fpi = fep->fpi;
153
154 if(fep->ring_base)
155 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
156 * sizeof(cbd_t),
157 (void __force *)fep->ring_base,
158 fep->ring_mem_addr);
159}
160
161static void cleanup_data(struct net_device *dev)
162{
163
164}
165
166static void set_promiscuous_mode(struct net_device *dev)
167{
168 struct fs_enet_private *fep = netdev_priv(dev);
169 struct fec __iomem *fecp = fep->fec.fecp;
170
171 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
172}
173
174static void set_multicast_start(struct net_device *dev)
175{
176 struct fs_enet_private *fep = netdev_priv(dev);
177
178 fep->fec.hthi = 0;
179 fep->fec.htlo = 0;
180}
181
182static void set_multicast_one(struct net_device *dev, const u8 *mac)
183{
184 struct fs_enet_private *fep = netdev_priv(dev);
185 int temp, hash_index, i, j;
186 u32 crc, csrVal;
187 u8 byte, msb;
188
189 crc = 0xffffffff;
190 for (i = 0; i < 6; i++) {
191 byte = mac[i];
192 for (j = 0; j < 8; j++) {
193 msb = crc >> 31;
194 crc <<= 1;
195 if (msb ^ (byte & 0x1))
196 crc ^= FEC_CRC_POLY;
197 byte >>= 1;
198 }
199 }
200
201 temp = (crc & 0x3f) >> 1;
202 hash_index = ((temp & 0x01) << 4) |
203 ((temp & 0x02) << 2) |
204 ((temp & 0x04)) |
205 ((temp & 0x08) >> 2) |
206 ((temp & 0x10) >> 4);
207 csrVal = 1 << hash_index;
208 if (crc & 1)
209 fep->fec.hthi |= csrVal;
210 else
211 fep->fec.htlo |= csrVal;
212}
213
214static void set_multicast_finish(struct net_device *dev)
215{
216 struct fs_enet_private *fep = netdev_priv(dev);
217 struct fec __iomem *fecp = fep->fec.fecp;
218
219
220 if ((dev->flags & IFF_ALLMULTI) != 0 ||
221 netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
222 fep->fec.hthi = 0xffffffffU;
223 fep->fec.htlo = 0xffffffffU;
224 }
225
226 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
227 FW(fecp, grp_hash_table_high, fep->fec.hthi);
228 FW(fecp, grp_hash_table_low, fep->fec.htlo);
229}
230
231static void set_multicast_list(struct net_device *dev)
232{
233 struct netdev_hw_addr *ha;
234
235 if ((dev->flags & IFF_PROMISC) == 0) {
236 set_multicast_start(dev);
237 netdev_for_each_mc_addr(ha, dev)
238 set_multicast_one(dev, ha->addr);
239 set_multicast_finish(dev);
240 } else
241 set_promiscuous_mode(dev);
242}
243
244static void restart(struct net_device *dev)
245{
246 struct fs_enet_private *fep = netdev_priv(dev);
247 struct fec __iomem *fecp = fep->fec.fecp;
248 const struct fs_platform_info *fpi = fep->fpi;
249 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
250 int r;
251 u32 addrhi, addrlo;
252
253 struct mii_bus *mii = dev->phydev->mdio.bus;
254 struct fec_info* fec_inf = mii->priv;
255
256 r = whack_reset(fep->fec.fecp);
257 if (r != 0)
258 dev_err(fep->dev, "FEC Reset FAILED!\n");
259
260
261
262 addrhi = ((u32) dev->dev_addr[0] << 24) |
263 ((u32) dev->dev_addr[1] << 16) |
264 ((u32) dev->dev_addr[2] << 8) |
265 (u32) dev->dev_addr[3];
266 addrlo = ((u32) dev->dev_addr[4] << 24) |
267 ((u32) dev->dev_addr[5] << 16);
268 FW(fecp, addr_low, addrhi);
269 FW(fecp, addr_high, addrlo);
270
271
272
273
274 FW(fecp, grp_hash_table_high, fep->fec.hthi);
275 FW(fecp, grp_hash_table_low, fep->fec.htlo);
276
277
278
279
280 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
281#ifdef CONFIG_FS_ENET_MPC5121_FEC
282 FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
283#else
284 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
285#endif
286
287
288 rx_bd_base_phys = fep->ring_mem_addr;
289 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
290
291
292
293
294 FW(fecp, r_des_start, rx_bd_base_phys);
295 FW(fecp, x_des_start, tx_bd_base_phys);
296
297 fs_init_bds(dev);
298
299
300
301
302#ifdef CONFIG_FS_ENET_MPC5121_FEC
303 FS(fecp, dma_control, 0xC0000000);
304#else
305 FW(fecp, fun_code, 0x78000000);
306#endif
307
308
309
310
311 FW(fecp, mii_speed, fec_inf->mii_speed);
312
313
314
315
316 FW(fecp, ievent, 0xffc0);
317#ifndef CONFIG_FS_ENET_MPC5121_FEC
318 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
319
320 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE);
321#else
322
323
324
325
326 FS(fecp, r_cntrl, fpi->use_rmii ?
327 FEC_RCNTRL_RMII_MODE : FEC_RCNTRL_MII_MODE);
328#endif
329
330
331
332 if (dev->phydev->duplex) {
333 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
334 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN);
335 } else {
336 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
337 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN);
338 }
339
340
341 set_multicast_list(dev);
342
343
344
345
346 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
347 FEC_ENET_RXF | FEC_ENET_RXB);
348
349
350
351
352 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
353 FW(fecp, r_des_active, 0x01000000);
354}
355
356static void stop(struct net_device *dev)
357{
358 struct fs_enet_private *fep = netdev_priv(dev);
359 const struct fs_platform_info *fpi = fep->fpi;
360 struct fec __iomem *fecp = fep->fec.fecp;
361
362 struct fec_info *feci = dev->phydev->mdio.bus->priv;
363
364 int i;
365
366 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
367 return;
368
369 FW(fecp, x_cntrl, 0x01);
370 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
371 i < FEC_RESET_DELAY; i++)
372 udelay(1);
373
374 if (i == FEC_RESET_DELAY)
375 dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
376
377
378
379 FW(fecp, imask, 0);
380 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
381
382 fs_cleanup_bds(dev);
383
384
385 if (fpi->has_phy) {
386 FS(fecp, r_cntrl, fpi->use_rmii ?
387 FEC_RCNTRL_RMII_MODE :
388 FEC_RCNTRL_MII_MODE);
389 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
390 FW(fecp, ievent, FEC_ENET_MII);
391 FW(fecp, mii_speed, feci->mii_speed);
392 }
393}
394
395static void napi_clear_event_fs(struct net_device *dev)
396{
397 struct fs_enet_private *fep = netdev_priv(dev);
398 struct fec __iomem *fecp = fep->fec.fecp;
399
400 FW(fecp, ievent, FEC_NAPI_EVENT_MSK);
401}
402
403static void napi_enable_fs(struct net_device *dev)
404{
405 struct fs_enet_private *fep = netdev_priv(dev);
406 struct fec __iomem *fecp = fep->fec.fecp;
407
408 FS(fecp, imask, FEC_NAPI_EVENT_MSK);
409}
410
411static void napi_disable_fs(struct net_device *dev)
412{
413 struct fs_enet_private *fep = netdev_priv(dev);
414 struct fec __iomem *fecp = fep->fec.fecp;
415
416 FC(fecp, imask, FEC_NAPI_EVENT_MSK);
417}
418
419static void rx_bd_done(struct net_device *dev)
420{
421 struct fs_enet_private *fep = netdev_priv(dev);
422 struct fec __iomem *fecp = fep->fec.fecp;
423
424 FW(fecp, r_des_active, 0x01000000);
425}
426
427static void tx_kickstart(struct net_device *dev)
428{
429 struct fs_enet_private *fep = netdev_priv(dev);
430 struct fec __iomem *fecp = fep->fec.fecp;
431
432 FW(fecp, x_des_active, 0x01000000);
433}
434
435static u32 get_int_events(struct net_device *dev)
436{
437 struct fs_enet_private *fep = netdev_priv(dev);
438 struct fec __iomem *fecp = fep->fec.fecp;
439
440 return FR(fecp, ievent) & FR(fecp, imask);
441}
442
443static void clear_int_events(struct net_device *dev, u32 int_events)
444{
445 struct fs_enet_private *fep = netdev_priv(dev);
446 struct fec __iomem *fecp = fep->fec.fecp;
447
448 FW(fecp, ievent, int_events);
449}
450
451static void ev_error(struct net_device *dev, u32 int_events)
452{
453 struct fs_enet_private *fep = netdev_priv(dev);
454
455 dev_warn(fep->dev, "FEC ERROR(s) 0x%x\n", int_events);
456}
457
458static int get_regs(struct net_device *dev, void *p, int *sizep)
459{
460 struct fs_enet_private *fep = netdev_priv(dev);
461
462 if (*sizep < sizeof(struct fec))
463 return -EINVAL;
464
465 memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));
466
467 return 0;
468}
469
470static int get_regs_len(struct net_device *dev)
471{
472 return sizeof(struct fec);
473}
474
475static void tx_restart(struct net_device *dev)
476{
477
478}
479
480
481
482const struct fs_ops fs_fec_ops = {
483 .setup_data = setup_data,
484 .cleanup_data = cleanup_data,
485 .set_multicast_list = set_multicast_list,
486 .restart = restart,
487 .stop = stop,
488 .napi_clear_event = napi_clear_event_fs,
489 .napi_enable = napi_enable_fs,
490 .napi_disable = napi_disable_fs,
491 .rx_bd_done = rx_bd_done,
492 .tx_kickstart = tx_kickstart,
493 .get_int_events = get_int_events,
494 .clear_int_events = clear_int_events,
495 .ev_error = ev_error,
496 .get_regs = get_regs,
497 .get_regs_len = get_regs_len,
498 .tx_restart = tx_restart,
499 .allocate_bd = allocate_bd,
500 .free_bd = free_bd,
501};
502
503
