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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / net / ethernet / freescale / fs_enet / mac-scc.c
blob7a184e8816a48f9eb74f4890b60b32345dbcf5f1
1 /*
2 * Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
3 *
4 * Copyright (c) 2003 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_irq.h>
35 #include <linux/of_platform.h>
36
37 #include <asm/irq.h>
38 #include <asm/uaccess.h>
39
40 #ifdef CONFIG_8xx
41 #include <asm/8xx_immap.h>
42 #include <asm/pgtable.h>
43 #include <asm/cpm1.h>
44 #endif
45
46 #include "fs_enet.h"
47
48 /*************************************************/
49 #if defined(CONFIG_CPM1)
50 /* for a 8xx __raw_xxx's are sufficient */
51 #define __fs_out32(addr, x) __raw_writel(x, addr)
52 #define __fs_out16(addr, x) __raw_writew(x, addr)
53 #define __fs_out8(addr, x) __raw_writeb(x, addr)
54 #define __fs_in32(addr) __raw_readl(addr)
55 #define __fs_in16(addr) __raw_readw(addr)
56 #define __fs_in8(addr) __raw_readb(addr)
57 #else
58 /* for others play it safe */
59 #define __fs_out32(addr, x) out_be32(addr, x)
60 #define __fs_out16(addr, x) out_be16(addr, x)
61 #define __fs_in32(addr) in_be32(addr)
62 #define __fs_in16(addr) in_be16(addr)
63 #define __fs_out8(addr, x) out_8(addr, x)
64 #define __fs_in8(addr) in_8(addr)
65 #endif
66
67 /* write, read, set bits, clear bits */
68 #define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
69 #define R32(_p, _m) __fs_in32(&(_p)->_m)
70 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
71 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
72
73 #define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
74 #define R16(_p, _m) __fs_in16(&(_p)->_m)
75 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
76 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
77
78 #define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
79 #define R8(_p, _m) __fs_in8(&(_p)->_m)
80 #define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
81 #define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
82
83 #define SCC_MAX_MULTICAST_ADDRS 64
84
85 /*
86 * Delay to wait for SCC reset command to complete (in us)
87 */
88 #define SCC_RESET_DELAY 50
89
90 static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
91 {
92 const struct fs_platform_info *fpi = fep->fpi;
93
94 return cpm_command(fpi->cp_command, op);
95 }
96
97 static 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 == NO_IRQ)
103 return -EINVAL;
104
105 fep->scc.sccp = of_iomap(ofdev->dev.of_node, 0);
106 if (!fep->scc.sccp)
107 return -EINVAL;
108
109 fep->scc.ep = of_iomap(ofdev->dev.of_node, 1);
110 if (!fep->scc.ep) {
111 iounmap(fep->scc.sccp);
112 return -EINVAL;
113 }
114
115 return 0;
116 }
117
118 #define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB)
119 #define SCC_NAPI_TX_EVENT_MSK (SCCE_ENET_TXB)
120 #define SCC_RX_EVENT (SCCE_ENET_RXF)
121 #define SCC_TX_EVENT (SCCE_ENET_TXB)
122 #define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY)
123
124 static int setup_data(struct net_device *dev)
125 {
126 struct fs_enet_private *fep = netdev_priv(dev);
127
128 do_pd_setup(fep);
129
130 fep->scc.hthi = 0;
131 fep->scc.htlo = 0;
132
133 fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
134 fep->ev_napi_tx = SCC_NAPI_TX_EVENT_MSK;
135 fep->ev_rx = SCC_RX_EVENT;
136 fep->ev_tx = SCC_TX_EVENT | SCCE_ENET_TXE;
137 fep->ev_err = SCC_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_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
148 sizeof(cbd_t), 8);
149 if (IS_ERR_VALUE(fep->ring_mem_addr))
150 return -ENOMEM;
151
152 fep->ring_base = (void __iomem __force*)
153 cpm_dpram_addr(fep->ring_mem_addr);
154
155 return 0;
156 }
157
158 static void free_bd(struct net_device *dev)
159 {
160 struct fs_enet_private *fep = netdev_priv(dev);
161
162 if (fep->ring_base)
163 cpm_dpfree(fep->ring_mem_addr);
164 }
165
166 static void cleanup_data(struct net_device *dev)
167 {
168 /* nothing */
169 }
170
171 static void set_promiscuous_mode(struct net_device *dev)
172 {
173 struct fs_enet_private *fep = netdev_priv(dev);
174 scc_t __iomem *sccp = fep->scc.sccp;
175
176 S16(sccp, scc_psmr, SCC_PSMR_PRO);
177 }
178
179 static void set_multicast_start(struct net_device *dev)
180 {
181 struct fs_enet_private *fep = netdev_priv(dev);
182 scc_enet_t __iomem *ep = fep->scc.ep;
183
184 W16(ep, sen_gaddr1, 0);
185 W16(ep, sen_gaddr2, 0);
186 W16(ep, sen_gaddr3, 0);
187 W16(ep, sen_gaddr4, 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 scc_enet_t __iomem *ep = fep->scc.ep;
194 u16 taddrh, taddrm, taddrl;
195
196 taddrh = ((u16) mac[5] << 8) | mac[4];
197 taddrm = ((u16) mac[3] << 8) | mac[2];
198 taddrl = ((u16) mac[1] << 8) | mac[0];
199
200 W16(ep, sen_taddrh, taddrh);
201 W16(ep, sen_taddrm, taddrm);
202 W16(ep, sen_taddrl, taddrl);
203 scc_cr_cmd(fep, CPM_CR_SET_GADDR);
204 }
205
206 static void set_multicast_finish(struct net_device *dev)
207 {
208 struct fs_enet_private *fep = netdev_priv(dev);
209 scc_t __iomem *sccp = fep->scc.sccp;
210 scc_enet_t __iomem *ep = fep->scc.ep;
211
212 /* clear promiscuous always */
213 C16(sccp, scc_psmr, SCC_PSMR_PRO);
214
215 /* if all multi or too many multicasts; just enable all */
216 if ((dev->flags & IFF_ALLMULTI) != 0 ||
217 netdev_mc_count(dev) > SCC_MAX_MULTICAST_ADDRS) {
218
219 W16(ep, sen_gaddr1, 0xffff);
220 W16(ep, sen_gaddr2, 0xffff);
221 W16(ep, sen_gaddr3, 0xffff);
222 W16(ep, sen_gaddr4, 0xffff);
223 }
224 }
225
226 static void set_multicast_list(struct net_device *dev)
227 {
228 struct netdev_hw_addr *ha;
229
230 if ((dev->flags & IFF_PROMISC) == 0) {
231 set_multicast_start(dev);
232 netdev_for_each_mc_addr(ha, dev)
233 set_multicast_one(dev, ha->addr);
234 set_multicast_finish(dev);
235 } else
236 set_promiscuous_mode(dev);
237 }
238
239 /*
240 * This function is called to start or restart the FEC during a link
241 * change. This only happens when switching between half and full
242 * duplex.
243 */
244 static void restart(struct net_device *dev)
245 {
246 struct fs_enet_private *fep = netdev_priv(dev);
247 scc_t __iomem *sccp = fep->scc.sccp;
248 scc_enet_t __iomem *ep = fep->scc.ep;
249 const struct fs_platform_info *fpi = fep->fpi;
250 u16 paddrh, paddrm, paddrl;
251 const unsigned char *mac;
252 int i;
253
254 C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
255
256 /* clear everything (slow & steady does it) */
257 for (i = 0; i < sizeof(*ep); i++)
258 __fs_out8((u8 __iomem *)ep + i, 0);
259
260 /* point to bds */
261 W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
262 W16(ep, sen_genscc.scc_tbase,
263 fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);
264
265 /* Initialize function code registers for big-endian.
266 */
267 #ifndef CONFIG_NOT_COHERENT_CACHE
268 W8(ep, sen_genscc.scc_rfcr, SCC_EB | SCC_GBL);
269 W8(ep, sen_genscc.scc_tfcr, SCC_EB | SCC_GBL);
270 #else
271 W8(ep, sen_genscc.scc_rfcr, SCC_EB);
272 W8(ep, sen_genscc.scc_tfcr, SCC_EB);
273 #endif
274
275 /* Set maximum bytes per receive buffer.
276 * This appears to be an Ethernet frame size, not the buffer
277 * fragment size. It must be a multiple of four.
278 */
279 W16(ep, sen_genscc.scc_mrblr, 0x5f0);
280
281 /* Set CRC preset and mask.
282 */
283 W32(ep, sen_cpres, 0xffffffff);
284 W32(ep, sen_cmask, 0xdebb20e3);
285
286 W32(ep, sen_crcec, 0); /* CRC Error counter */
287 W32(ep, sen_alec, 0); /* alignment error counter */
288 W32(ep, sen_disfc, 0); /* discard frame counter */
289
290 W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
291 W16(ep, sen_retlim, 15); /* Retry limit threshold */
292
293 W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */
294
295 W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
296
297 W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
298 W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */
299
300 /* Clear hash tables.
301 */
302 W16(ep, sen_gaddr1, 0);
303 W16(ep, sen_gaddr2, 0);
304 W16(ep, sen_gaddr3, 0);
305 W16(ep, sen_gaddr4, 0);
306 W16(ep, sen_iaddr1, 0);
307 W16(ep, sen_iaddr2, 0);
308 W16(ep, sen_iaddr3, 0);
309 W16(ep, sen_iaddr4, 0);
310
311 /* set address
312 */
313 mac = dev->dev_addr;
314 paddrh = ((u16) mac[5] << 8) | mac[4];
315 paddrm = ((u16) mac[3] << 8) | mac[2];
316 paddrl = ((u16) mac[1] << 8) | mac[0];
317
318 W16(ep, sen_paddrh, paddrh);
319 W16(ep, sen_paddrm, paddrm);
320 W16(ep, sen_paddrl, paddrl);
321
322 W16(ep, sen_pper, 0);
323 W16(ep, sen_taddrl, 0);
324 W16(ep, sen_taddrm, 0);
325 W16(ep, sen_taddrh, 0);
326
327 fs_init_bds(dev);
328
329 scc_cr_cmd(fep, CPM_CR_INIT_TRX);
330
331 W16(sccp, scc_scce, 0xffff);
332
333 /* Enable interrupts we wish to service.
334 */
335 W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
336
337 /* Set GSMR_H to enable all normal operating modes.
338 * Set GSMR_L to enable Ethernet to MC68160.
339 */
340 W32(sccp, scc_gsmrh, 0);
341 W32(sccp, scc_gsmrl,
342 SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 |
343 SCC_GSMRL_MODE_ENET);
344
345 /* Set sync/delimiters.
346 */
347 W16(sccp, scc_dsr, 0xd555);
348
349 /* Set processing mode. Use Ethernet CRC, catch broadcast, and
350 * start frame search 22 bit times after RENA.
351 */
352 W16(sccp, scc_psmr, SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
353
354 /* Set full duplex mode if needed */
355 if (fep->phydev->duplex)
356 S16(sccp, scc_psmr, SCC_PSMR_LPB | SCC_PSMR_FDE);
357
358 /* Restore multicast and promiscuous settings */
359 set_multicast_list(dev);
360
361 S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
362 }
363
364 static void stop(struct net_device *dev)
365 {
366 struct fs_enet_private *fep = netdev_priv(dev);
367 scc_t __iomem *sccp = fep->scc.sccp;
368 int i;
369
370 for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
371 udelay(1);
372
373 if (i == SCC_RESET_DELAY)
374 dev_warn(fep->dev, "SCC timeout on graceful transmit stop\n");
375
376 W16(sccp, scc_sccm, 0);
377 C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
378
379 fs_cleanup_bds(dev);
380 }
381
382 static void napi_clear_rx_event(struct net_device *dev)
383 {
384 struct fs_enet_private *fep = netdev_priv(dev);
385 scc_t __iomem *sccp = fep->scc.sccp;
386
387 W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
388 }
389
390 static void napi_enable_rx(struct net_device *dev)
391 {
392 struct fs_enet_private *fep = netdev_priv(dev);
393 scc_t __iomem *sccp = fep->scc.sccp;
394
395 S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
396 }
397
398 static void napi_disable_rx(struct net_device *dev)
399 {
400 struct fs_enet_private *fep = netdev_priv(dev);
401 scc_t __iomem *sccp = fep->scc.sccp;
402
403 C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
404 }
405
406 static void napi_clear_tx_event(struct net_device *dev)
407 {
408 struct fs_enet_private *fep = netdev_priv(dev);
409 scc_t __iomem *sccp = fep->scc.sccp;
410
411 W16(sccp, scc_scce, SCC_NAPI_TX_EVENT_MSK);
412 }
413
414 static void napi_enable_tx(struct net_device *dev)
415 {
416 struct fs_enet_private *fep = netdev_priv(dev);
417 scc_t __iomem *sccp = fep->scc.sccp;
418
419 S16(sccp, scc_sccm, SCC_NAPI_TX_EVENT_MSK);
420 }
421
422 static void napi_disable_tx(struct net_device *dev)
423 {
424 struct fs_enet_private *fep = netdev_priv(dev);
425 scc_t __iomem *sccp = fep->scc.sccp;
426
427 C16(sccp, scc_sccm, SCC_NAPI_TX_EVENT_MSK);
428 }
429
430 static void rx_bd_done(struct net_device *dev)
431 {
432 /* nothing */
433 }
434
435 static void tx_kickstart(struct net_device *dev)
436 {
437 /* nothing */
438 }
439
440 static u32 get_int_events(struct net_device *dev)
441 {
442 struct fs_enet_private *fep = netdev_priv(dev);
443 scc_t __iomem *sccp = fep->scc.sccp;
444
445 return (u32) R16(sccp, scc_scce);
446 }
447
448 static void clear_int_events(struct net_device *dev, u32 int_events)
449 {
450 struct fs_enet_private *fep = netdev_priv(dev);
451 scc_t __iomem *sccp = fep->scc.sccp;
452
453 W16(sccp, scc_scce, int_events & 0xffff);
454 }
455
456 static void ev_error(struct net_device *dev, u32 int_events)
457 {
458 struct fs_enet_private *fep = netdev_priv(dev);
459
460 dev_warn(fep->dev, "SCC ERROR(s) 0x%x\n", int_events);
461 }
462
463 static int get_regs(struct net_device *dev, void *p, int *sizep)
464 {
465 struct fs_enet_private *fep = netdev_priv(dev);
466
467 if (*sizep < sizeof(scc_t) + sizeof(scc_enet_t __iomem *))
468 return -EINVAL;
469
470 memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
471 p = (char *)p + sizeof(scc_t);
472
473 memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t __iomem *));
474
475 return 0;
476 }
477
478 static int get_regs_len(struct net_device *dev)
479 {
480 return sizeof(scc_t) + sizeof(scc_enet_t __iomem *);
481 }
482
483 static void tx_restart(struct net_device *dev)
484 {
485 struct fs_enet_private *fep = netdev_priv(dev);
486
487 scc_cr_cmd(fep, CPM_CR_RESTART_TX);
488 }
489
490
491
492 /*************************************************************************/
493
494 const struct fs_ops fs_scc_ops = {
495 .setup_data = setup_data,
496 .cleanup_data = cleanup_data,
497 .set_multicast_list = set_multicast_list,
498 .restart = restart,
499 .stop = stop,
500 .napi_clear_rx_event = napi_clear_rx_event,
501 .napi_enable_rx = napi_enable_rx,
502 .napi_disable_rx = napi_disable_rx,
503 .napi_clear_tx_event = napi_clear_tx_event,
504 .napi_enable_tx = napi_enable_tx,
505 .napi_disable_tx = napi_disable_tx,
506 .rx_bd_done = rx_bd_done,
507 .tx_kickstart = tx_kickstart,
508 .get_int_events = get_int_events,
509 .clear_int_events = clear_int_events,
510 .ev_error = ev_error,
511 .get_regs = get_regs,
512 .get_regs_len = get_regs_len,
513 .tx_restart = tx_restart,
514 .allocate_bd = allocate_bd,
515 .free_bd = free_bd,
516 };
Linux with added FPC-III support