1
2
3
4
5
6
7
8
9
10
11
12
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/crc32.h>
22#include <linux/ioport.h>
23#include <linux/interrupt.h>
24#include <linux/delay.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/skbuff.h>
28#include <linux/spinlock.h>
29#include <linux/mii.h>
30#include <linux/ethtool.h>
31#include <linux/bitops.h>
32#include <linux/fs.h>
33#include <linux/platform_device.h>
34#include <linux/of_address.h>
35#include <linux/of_device.h>
36#include <linux/of_irq.h>
37#include <linux/gfp.h>
38
39#include <asm/irq.h>
40#include <linux/uaccess.h>
41
42#include "fs_enet.h"
43#include "fec.h"
44
45
46
47#if defined(CONFIG_CPM1)
48
49#define __fs_out32(addr, x) __raw_writel(x, addr)
50#define __fs_out16(addr, x) __raw_writew(x, addr)
51#define __fs_in32(addr) __raw_readl(addr)
52#define __fs_in16(addr) __raw_readw(addr)
53#else
54
55#define __fs_out32(addr, x) out_be32(addr, x)
56#define __fs_out16(addr, x) out_be16(addr, x)
57#define __fs_in32(addr) in_be32(addr)
58#define __fs_in16(addr) in_be16(addr)
59#endif
60
61
62#define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
63
64
65#define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
66
67
68#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
69
70
71#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
72
73
74
75
76#define FEC_RESET_DELAY 50
77
78static int whack_reset(struct fec __iomem *fecp)
79{
80 int i;
81
82 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
83 for (i = 0; i < FEC_RESET_DELAY; i++) {
84 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
85 return 0;
86 udelay(1);
87 }
88
89 return -1;
90}
91
92static int do_pd_setup(struct fs_enet_private *fep)
93{
94 struct platform_device *ofdev = to_platform_device(fep->dev);
95
96 fep->interrupt = irq_of_parse_and_map(ofdev->dev.of_node, 0);
97 if (!fep->interrupt)
98 return -EINVAL;
99
100 fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
101 if (!fep->fcc.fccp)
102 return -EINVAL;
103
104 return 0;
105}
106
107#define FEC_NAPI_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_TXF)
108#define FEC_EVENT (FEC_ENET_RXF | FEC_ENET_TXF)
109#define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
110 FEC_ENET_BABT | FEC_ENET_EBERR)
111
112static int setup_data(struct net_device *dev)
113{
114 struct fs_enet_private *fep = netdev_priv(dev);
115
116 if (do_pd_setup(fep) != 0)
117 return -EINVAL;
118
119 fep->fec.hthi = 0;
120 fep->fec.htlo = 0;
121
122 fep->ev_napi = FEC_NAPI_EVENT_MSK;
123 fep->ev = FEC_EVENT;
124 fep->ev_err = FEC_ERR_EVENT_MSK;
125
126 return 0;
127}
128
129static int allocate_bd(struct net_device *dev)
130{
131 struct fs_enet_private *fep = netdev_priv(dev);
132 const struct fs_platform_info *fpi = fep->fpi;
133
134 fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
135 (fpi->tx_ring + fpi->rx_ring) *
136 sizeof(cbd_t), &fep->ring_mem_addr,
137 GFP_KERNEL);
138 if (fep->ring_base == NULL)
139 return -ENOMEM;
140
141 return 0;
142}
143
144static void free_bd(struct net_device *dev)
145{
146 struct fs_enet_private *fep = netdev_priv(dev);
147 const struct fs_platform_info *fpi = fep->fpi;
148
149 if(fep->ring_base)
150 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
151 * sizeof(cbd_t),
152 (void __force *)fep->ring_base,
153 fep->ring_mem_addr);
154}
155
156static void cleanup_data(struct net_device *dev)
157{
158
159}
160
161static void set_promiscuous_mode(struct net_device *dev)
162{
163 struct fs_enet_private *fep = netdev_priv(dev);
164 struct fec __iomem *fecp = fep->fec.fecp;
165
166 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
167}
168
169static void set_multicast_start(struct net_device *dev)
170{
171 struct fs_enet_private *fep = netdev_priv(dev);
172
173 fep->fec.hthi = 0;
174 fep->fec.htlo = 0;
175}
176
177static void set_multicast_one(struct net_device *dev, const u8 *mac)
178{
179 struct fs_enet_private *fep = netdev_priv(dev);
180 int temp, hash_index;
181 u32 crc, csrVal;
182
183 crc = ether_crc(6, mac);
184
185 temp = (crc & 0x3f) >> 1;
186 hash_index = ((temp & 0x01) << 4) |
187 ((temp & 0x02) << 2) |
188 ((temp & 0x04)) |
189 ((temp & 0x08) >> 2) |
190 ((temp & 0x10) >> 4);
191 csrVal = 1 << hash_index;
192 if (crc & 1)
193 fep->fec.hthi |= csrVal;
194 else
195 fep->fec.htlo |= csrVal;
196}
197
198static void set_multicast_finish(struct net_device *dev)
199{
200 struct fs_enet_private *fep = netdev_priv(dev);
201 struct fec __iomem *fecp = fep->fec.fecp;
202
203
204 if ((dev->flags & IFF_ALLMULTI) != 0 ||
205 netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
206 fep->fec.hthi = 0xffffffffU;
207 fep->fec.htlo = 0xffffffffU;
208 }
209
210 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
211 FW(fecp, grp_hash_table_high, fep->fec.hthi);
212 FW(fecp, grp_hash_table_low, fep->fec.htlo);
213}
214
215static void set_multicast_list(struct net_device *dev)
216{
217 struct netdev_hw_addr *ha;
218
219 if ((dev->flags & IFF_PROMISC) == 0) {
220 set_multicast_start(dev);
221 netdev_for_each_mc_addr(ha, dev)
222 set_multicast_one(dev, ha->addr);
223 set_multicast_finish(dev);
224 } else
225 set_promiscuous_mode(dev);
226}
227
228static void restart(struct net_device *dev)
229{
230 struct fs_enet_private *fep = netdev_priv(dev);
231 struct fec __iomem *fecp = fep->fec.fecp;
232 const struct fs_platform_info *fpi = fep->fpi;
233 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
234 int r;
235 u32 addrhi, addrlo;
236
237 struct mii_bus *mii = dev->phydev->mdio.bus;
238 struct fec_info* fec_inf = mii->priv;
239
240 r = whack_reset(fep->fec.fecp);
241 if (r != 0)
242 dev_err(fep->dev, "FEC Reset FAILED!\n");
243
244
245
246 addrhi = ((u32) dev->dev_addr[0] << 24) |
247 ((u32) dev->dev_addr[1] << 16) |
248 ((u32) dev->dev_addr[2] << 8) |
249 (u32) dev->dev_addr[3];
250 addrlo = ((u32) dev->dev_addr[4] << 24) |
251 ((u32) dev->dev_addr[5] << 16);
252 FW(fecp, addr_low, addrhi);
253 FW(fecp, addr_high, addrlo);
254
255
256
257
258 FW(fecp, grp_hash_table_high, fep->fec.hthi);
259 FW(fecp, grp_hash_table_low, fep->fec.htlo);
260
261
262
263
264 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
265#ifdef CONFIG_FS_ENET_MPC5121_FEC
266 FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
267#else
268 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
269#endif
270
271
272 rx_bd_base_phys = fep->ring_mem_addr;
273 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
274
275
276
277
278 FW(fecp, r_des_start, rx_bd_base_phys);
279 FW(fecp, x_des_start, tx_bd_base_phys);
280
281 fs_init_bds(dev);
282
283
284
285
286#ifdef CONFIG_FS_ENET_MPC5121_FEC
287 FS(fecp, dma_control, 0xC0000000);
288#else
289 FW(fecp, fun_code, 0x78000000);
290#endif
291
292
293
294
295 FW(fecp, mii_speed, fec_inf->mii_speed);
296
297
298
299
300 FW(fecp, ievent, 0xffc0);
301#ifndef CONFIG_FS_ENET_MPC5121_FEC
302 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
303
304 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE);
305#else
306
307
308
309
310 FS(fecp, r_cntrl, fpi->use_rmii ?
311 FEC_RCNTRL_RMII_MODE : FEC_RCNTRL_MII_MODE);
312#endif
313
314
315
316 if (dev->phydev->duplex) {
317 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
318 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN);
319 } else {
320 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
321 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN);
322 }
323
324
325 set_multicast_list(dev);
326
327
328
329
330 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
331 FEC_ENET_RXF | FEC_ENET_RXB);
332
333
334
335
336 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
337 FW(fecp, r_des_active, 0x01000000);
338}
339
340static void stop(struct net_device *dev)
341{
342 struct fs_enet_private *fep = netdev_priv(dev);
343 const struct fs_platform_info *fpi = fep->fpi;
344 struct fec __iomem *fecp = fep->fec.fecp;
345
346 struct fec_info *feci = dev->phydev->mdio.bus->priv;
347
348 int i;
349
350 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
351 return;
352
353 FW(fecp, x_cntrl, 0x01);
354 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
355 i < FEC_RESET_DELAY; i++)
356 udelay(1);
357
358 if (i == FEC_RESET_DELAY)
359 dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
360
361
362
363 FW(fecp, imask, 0);
364 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
365
366 fs_cleanup_bds(dev);
367
368
369 if (fpi->has_phy) {
370 FS(fecp, r_cntrl, fpi->use_rmii ?
371 FEC_RCNTRL_RMII_MODE :
372 FEC_RCNTRL_MII_MODE);
373 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
374 FW(fecp, ievent, FEC_ENET_MII);
375 FW(fecp, mii_speed, feci->mii_speed);
376 }
377}
378
379static void napi_clear_event_fs(struct net_device *dev)
380{
381 struct fs_enet_private *fep = netdev_priv(dev);
382 struct fec __iomem *fecp = fep->fec.fecp;
383
384 FW(fecp, ievent, FEC_NAPI_EVENT_MSK);
385}
386
387static void napi_enable_fs(struct net_device *dev)
388{
389 struct fs_enet_private *fep = netdev_priv(dev);
390 struct fec __iomem *fecp = fep->fec.fecp;
391
392 FS(fecp, imask, FEC_NAPI_EVENT_MSK);
393}
394
395static void napi_disable_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 FC(fecp, imask, FEC_NAPI_EVENT_MSK);
401}
402
403static void rx_bd_done(struct net_device *dev)
404{
405 struct fs_enet_private *fep = netdev_priv(dev);
406 struct fec __iomem *fecp = fep->fec.fecp;
407
408 FW(fecp, r_des_active, 0x01000000);
409}
410
411static void tx_kickstart(struct net_device *dev)
412{
413 struct fs_enet_private *fep = netdev_priv(dev);
414 struct fec __iomem *fecp = fep->fec.fecp;
415
416 FW(fecp, x_des_active, 0x01000000);
417}
418
419static u32 get_int_events(struct net_device *dev)
420{
421 struct fs_enet_private *fep = netdev_priv(dev);
422 struct fec __iomem *fecp = fep->fec.fecp;
423
424 return FR(fecp, ievent) & FR(fecp, imask);
425}
426
427static void clear_int_events(struct net_device *dev, u32 int_events)
428{
429 struct fs_enet_private *fep = netdev_priv(dev);
430 struct fec __iomem *fecp = fep->fec.fecp;
431
432 FW(fecp, ievent, int_events);
433}
434
435static void ev_error(struct net_device *dev, u32 int_events)
436{
437 struct fs_enet_private *fep = netdev_priv(dev);
438
439 dev_warn(fep->dev, "FEC ERROR(s) 0x%x\n", int_events);
440}
441
442static int get_regs(struct net_device *dev, void *p, int *sizep)
443{
444 struct fs_enet_private *fep = netdev_priv(dev);
445
446 if (*sizep < sizeof(struct fec))
447 return -EINVAL;
448
449 memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));
450
451 return 0;
452}
453
454static int get_regs_len(struct net_device *dev)
455{
456 return sizeof(struct fec);
457}
458
459static void tx_restart(struct net_device *dev)
460{
461
462}
463
464
465
466const struct fs_ops fs_fec_ops = {
467 .setup_data = setup_data,
468 .cleanup_data = cleanup_data,
469 .set_multicast_list = set_multicast_list,
470 .restart = restart,
471 .stop = stop,
472 .napi_clear_event = napi_clear_event_fs,
473 .napi_enable = napi_enable_fs,
474 .napi_disable = napi_disable_fs,
475 .rx_bd_done = rx_bd_done,
476 .tx_kickstart = tx_kickstart,
477 .get_int_events = get_int_events,
478 .clear_int_events = clear_int_events,
479 .ev_error = ev_error,
480 .get_regs = get_regs,
481 .get_regs_len = get_regs_len,
482 .tx_restart = tx_restart,
483 .allocate_bd = allocate_bd,
484 .free_bd = free_bd,
485};
486
487
