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d70e5326 JR |
1 | /** |
2 | * Microchip ENCX24J600 ethernet driver | |
3 | * | |
4 | * Copyright (C) 2015 Gridpoint | |
5 | * Author: Jon Ringle <jringle@gridpoint.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/device.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/ethtool.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/spi/spi.h> | |
25 | ||
26 | #include "encx24j600_hw.h" | |
27 | ||
28 | #define DRV_NAME "encx24j600" | |
29 | #define DRV_VERSION "1.0" | |
30 | ||
31 | #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) | |
32 | static int debug = -1; | |
33 | module_param(debug, int, 0); | |
34 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
35 | ||
36 | /* SRAM memory layout: | |
37 | * | |
38 | * 0x0000-0x05ff TX buffers 1.5KB (1*1536) reside in the GP area in SRAM | |
39 | * 0x0600-0x5fff RX buffers 22.5KB (15*1536) reside in the RX area in SRAM | |
40 | */ | |
41 | #define ENC_TX_BUF_START 0x0000U | |
42 | #define ENC_RX_BUF_START 0x0600U | |
43 | #define ENC_RX_BUF_END 0x5fffU | |
44 | #define ENC_SRAM_SIZE 0x6000U | |
45 | ||
46 | enum { | |
47 | RXFILTER_NORMAL, | |
48 | RXFILTER_MULTI, | |
49 | RXFILTER_PROMISC | |
50 | }; | |
51 | ||
52 | struct encx24j600_priv { | |
53 | struct net_device *ndev; | |
54 | struct mutex lock; /* device access lock */ | |
55 | struct encx24j600_context ctx; | |
56 | struct sk_buff *tx_skb; | |
57 | struct task_struct *kworker_task; | |
58 | struct kthread_worker kworker; | |
59 | struct kthread_work tx_work; | |
60 | struct kthread_work setrx_work; | |
61 | u16 next_packet; | |
62 | bool hw_enabled; | |
63 | bool full_duplex; | |
64 | bool autoneg; | |
65 | u16 speed; | |
66 | int rxfilter; | |
67 | u32 msg_enable; | |
68 | }; | |
69 | ||
70 | static void dump_packet(const char *msg, int len, const char *data) | |
71 | { | |
72 | pr_debug(DRV_NAME ": %s - packet len:%d\n", msg, len); | |
73 | print_hex_dump_bytes("pk data: ", DUMP_PREFIX_OFFSET, data, len); | |
74 | } | |
75 | ||
76 | static void encx24j600_dump_rsv(struct encx24j600_priv *priv, const char *msg, | |
77 | struct rsv *rsv) | |
78 | { | |
79 | struct net_device *dev = priv->ndev; | |
80 | ||
81 | netdev_info(dev, "RX packet Len:%d\n", rsv->len); | |
82 | netdev_dbg(dev, "%s - NextPk: 0x%04x\n", msg, | |
83 | rsv->next_packet); | |
84 | netdev_dbg(dev, "RxOK: %d, DribbleNibble: %d\n", | |
85 | RSV_GETBIT(rsv->rxstat, RSV_RXOK), | |
86 | RSV_GETBIT(rsv->rxstat, RSV_DRIBBLENIBBLE)); | |
87 | netdev_dbg(dev, "CRCErr:%d, LenChkErr: %d, LenOutOfRange: %d\n", | |
88 | RSV_GETBIT(rsv->rxstat, RSV_CRCERROR), | |
89 | RSV_GETBIT(rsv->rxstat, RSV_LENCHECKERR), | |
90 | RSV_GETBIT(rsv->rxstat, RSV_LENOUTOFRANGE)); | |
91 | netdev_dbg(dev, "Multicast: %d, Broadcast: %d, LongDropEvent: %d, CarrierEvent: %d\n", | |
92 | RSV_GETBIT(rsv->rxstat, RSV_RXMULTICAST), | |
93 | RSV_GETBIT(rsv->rxstat, RSV_RXBROADCAST), | |
94 | RSV_GETBIT(rsv->rxstat, RSV_RXLONGEVDROPEV), | |
95 | RSV_GETBIT(rsv->rxstat, RSV_CARRIEREV)); | |
96 | netdev_dbg(dev, "ControlFrame: %d, PauseFrame: %d, UnknownOp: %d, VLanTagFrame: %d\n", | |
97 | RSV_GETBIT(rsv->rxstat, RSV_RXCONTROLFRAME), | |
98 | RSV_GETBIT(rsv->rxstat, RSV_RXPAUSEFRAME), | |
99 | RSV_GETBIT(rsv->rxstat, RSV_RXUNKNOWNOPCODE), | |
100 | RSV_GETBIT(rsv->rxstat, RSV_RXTYPEVLAN)); | |
101 | } | |
102 | ||
103 | static u16 encx24j600_read_reg(struct encx24j600_priv *priv, u8 reg) | |
104 | { | |
105 | struct net_device *dev = priv->ndev; | |
106 | unsigned int val = 0; | |
107 | int ret = regmap_read(priv->ctx.regmap, reg, &val); | |
108 | if (unlikely(ret)) | |
109 | netif_err(priv, drv, dev, "%s: error %d reading reg %02x\n", | |
110 | __func__, ret, reg); | |
111 | return val; | |
112 | } | |
113 | ||
114 | static void encx24j600_write_reg(struct encx24j600_priv *priv, u8 reg, u16 val) | |
115 | { | |
116 | struct net_device *dev = priv->ndev; | |
117 | int ret = regmap_write(priv->ctx.regmap, reg, val); | |
118 | if (unlikely(ret)) | |
119 | netif_err(priv, drv, dev, "%s: error %d writing reg %02x=%04x\n", | |
120 | __func__, ret, reg, val); | |
121 | } | |
122 | ||
123 | static void encx24j600_update_reg(struct encx24j600_priv *priv, u8 reg, | |
124 | u16 mask, u16 val) | |
125 | { | |
126 | struct net_device *dev = priv->ndev; | |
127 | int ret = regmap_update_bits(priv->ctx.regmap, reg, mask, val); | |
128 | if (unlikely(ret)) | |
129 | netif_err(priv, drv, dev, "%s: error %d updating reg %02x=%04x~%04x\n", | |
130 | __func__, ret, reg, val, mask); | |
131 | } | |
132 | ||
133 | static u16 encx24j600_read_phy(struct encx24j600_priv *priv, u8 reg) | |
134 | { | |
135 | struct net_device *dev = priv->ndev; | |
136 | unsigned int val = 0; | |
137 | int ret = regmap_read(priv->ctx.phymap, reg, &val); | |
138 | if (unlikely(ret)) | |
139 | netif_err(priv, drv, dev, "%s: error %d reading %02x\n", | |
140 | __func__, ret, reg); | |
141 | return val; | |
142 | } | |
143 | ||
144 | static void encx24j600_write_phy(struct encx24j600_priv *priv, u8 reg, u16 val) | |
145 | { | |
146 | struct net_device *dev = priv->ndev; | |
147 | int ret = regmap_write(priv->ctx.phymap, reg, val); | |
148 | if (unlikely(ret)) | |
149 | netif_err(priv, drv, dev, "%s: error %d writing reg %02x=%04x\n", | |
150 | __func__, ret, reg, val); | |
151 | } | |
152 | ||
153 | static void encx24j600_clr_bits(struct encx24j600_priv *priv, u8 reg, u16 mask) | |
154 | { | |
155 | encx24j600_update_reg(priv, reg, mask, 0); | |
156 | } | |
157 | ||
158 | static void encx24j600_set_bits(struct encx24j600_priv *priv, u8 reg, u16 mask) | |
159 | { | |
160 | encx24j600_update_reg(priv, reg, mask, mask); | |
161 | } | |
162 | ||
163 | static void encx24j600_cmd(struct encx24j600_priv *priv, u8 cmd) | |
164 | { | |
165 | struct net_device *dev = priv->ndev; | |
166 | int ret = regmap_write(priv->ctx.regmap, cmd, 0); | |
167 | if (unlikely(ret)) | |
168 | netif_err(priv, drv, dev, "%s: error %d with cmd %02x\n", | |
169 | __func__, ret, cmd); | |
170 | } | |
171 | ||
172 | static int encx24j600_raw_read(struct encx24j600_priv *priv, u8 reg, u8 *data, | |
173 | size_t count) | |
174 | { | |
175 | int ret; | |
176 | mutex_lock(&priv->ctx.mutex); | |
177 | ret = regmap_encx24j600_spi_read(&priv->ctx, reg, data, count); | |
178 | mutex_unlock(&priv->ctx.mutex); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | static int encx24j600_raw_write(struct encx24j600_priv *priv, u8 reg, | |
184 | const u8 *data, size_t count) | |
185 | { | |
186 | int ret; | |
187 | mutex_lock(&priv->ctx.mutex); | |
188 | ret = regmap_encx24j600_spi_write(&priv->ctx, reg, data, count); | |
189 | mutex_unlock(&priv->ctx.mutex); | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | static void encx24j600_update_phcon1(struct encx24j600_priv *priv) | |
195 | { | |
196 | u16 phcon1 = encx24j600_read_phy(priv, PHCON1); | |
197 | if (priv->autoneg == AUTONEG_ENABLE) { | |
198 | phcon1 |= ANEN | RENEG; | |
199 | } else { | |
200 | phcon1 &= ~ANEN; | |
201 | if (priv->speed == SPEED_100) | |
202 | phcon1 |= SPD100; | |
203 | else | |
204 | phcon1 &= ~SPD100; | |
205 | ||
206 | if (priv->full_duplex) | |
207 | phcon1 |= PFULDPX; | |
208 | else | |
209 | phcon1 &= ~PFULDPX; | |
210 | } | |
211 | encx24j600_write_phy(priv, PHCON1, phcon1); | |
212 | } | |
213 | ||
214 | /* Waits for autonegotiation to complete. */ | |
215 | static int encx24j600_wait_for_autoneg(struct encx24j600_priv *priv) | |
216 | { | |
217 | struct net_device *dev = priv->ndev; | |
218 | unsigned long timeout = jiffies + msecs_to_jiffies(2000); | |
219 | u16 phstat1; | |
220 | u16 estat; | |
221 | int ret = 0; | |
222 | ||
223 | phstat1 = encx24j600_read_phy(priv, PHSTAT1); | |
224 | while ((phstat1 & ANDONE) == 0) { | |
225 | if (time_after(jiffies, timeout)) { | |
226 | u16 phstat3; | |
227 | ||
228 | netif_notice(priv, drv, dev, "timeout waiting for autoneg done\n"); | |
229 | ||
230 | priv->autoneg = AUTONEG_DISABLE; | |
231 | phstat3 = encx24j600_read_phy(priv, PHSTAT3); | |
232 | priv->speed = (phstat3 & PHY3SPD100) | |
233 | ? SPEED_100 : SPEED_10; | |
234 | priv->full_duplex = (phstat3 & PHY3DPX) ? 1 : 0; | |
235 | encx24j600_update_phcon1(priv); | |
236 | netif_notice(priv, drv, dev, "Using parallel detection: %s/%s", | |
237 | priv->speed == SPEED_100 ? "100" : "10", | |
238 | priv->full_duplex ? "Full" : "Half"); | |
239 | ||
240 | return -ETIMEDOUT; | |
241 | } | |
242 | cpu_relax(); | |
243 | phstat1 = encx24j600_read_phy(priv, PHSTAT1); | |
244 | } | |
245 | ||
246 | estat = encx24j600_read_reg(priv, ESTAT); | |
247 | if (estat & PHYDPX) { | |
248 | encx24j600_set_bits(priv, MACON2, FULDPX); | |
249 | encx24j600_write_reg(priv, MABBIPG, 0x15); | |
250 | } else { | |
251 | encx24j600_clr_bits(priv, MACON2, FULDPX); | |
252 | encx24j600_write_reg(priv, MABBIPG, 0x12); | |
253 | /* Max retransmittions attempt */ | |
254 | encx24j600_write_reg(priv, MACLCON, 0x370f); | |
255 | } | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | /* Access the PHY to determine link status */ | |
261 | static void encx24j600_check_link_status(struct encx24j600_priv *priv) | |
262 | { | |
263 | struct net_device *dev = priv->ndev; | |
264 | u16 estat; | |
265 | ||
266 | estat = encx24j600_read_reg(priv, ESTAT); | |
267 | ||
268 | if (estat & PHYLNK) { | |
269 | if (priv->autoneg == AUTONEG_ENABLE) | |
270 | encx24j600_wait_for_autoneg(priv); | |
271 | ||
272 | netif_carrier_on(dev); | |
273 | netif_info(priv, ifup, dev, "link up\n"); | |
274 | } else { | |
275 | netif_info(priv, ifdown, dev, "link down\n"); | |
276 | ||
277 | /* Re-enable autoneg since we won't know what we might be | |
278 | * connected to when the link is brought back up again. | |
279 | */ | |
280 | priv->autoneg = AUTONEG_ENABLE; | |
281 | priv->full_duplex = true; | |
282 | priv->speed = SPEED_100; | |
283 | netif_carrier_off(dev); | |
284 | } | |
285 | } | |
286 | ||
287 | static void encx24j600_int_link_handler(struct encx24j600_priv *priv) | |
288 | { | |
289 | struct net_device *dev = priv->ndev; | |
290 | ||
291 | netif_dbg(priv, intr, dev, "%s", __func__); | |
292 | encx24j600_check_link_status(priv); | |
293 | encx24j600_clr_bits(priv, EIR, LINKIF); | |
294 | } | |
295 | ||
296 | static void encx24j600_tx_complete(struct encx24j600_priv *priv, bool err) | |
297 | { | |
298 | struct net_device *dev = priv->ndev; | |
299 | ||
300 | if (!priv->tx_skb) { | |
301 | BUG(); | |
302 | return; | |
303 | } | |
304 | ||
305 | mutex_lock(&priv->lock); | |
306 | ||
307 | if (err) | |
308 | dev->stats.tx_errors++; | |
309 | else | |
310 | dev->stats.tx_packets++; | |
311 | ||
312 | dev->stats.tx_bytes += priv->tx_skb->len; | |
313 | ||
314 | encx24j600_clr_bits(priv, EIR, TXIF | TXABTIF); | |
315 | ||
316 | netif_dbg(priv, tx_done, dev, "TX Done%s\n", err ? ": Err" : ""); | |
317 | ||
318 | dev_kfree_skb(priv->tx_skb); | |
319 | priv->tx_skb = NULL; | |
320 | ||
321 | netif_wake_queue(dev); | |
322 | ||
323 | mutex_unlock(&priv->lock); | |
324 | } | |
325 | ||
326 | static int encx24j600_receive_packet(struct encx24j600_priv *priv, | |
327 | struct rsv *rsv) | |
328 | { | |
329 | struct net_device *dev = priv->ndev; | |
330 | struct sk_buff *skb = netdev_alloc_skb(dev, rsv->len + NET_IP_ALIGN); | |
331 | if (!skb) { | |
332 | pr_err_ratelimited("RX: OOM: packet dropped\n"); | |
333 | dev->stats.rx_dropped++; | |
334 | return -ENOMEM; | |
335 | } | |
336 | skb_reserve(skb, NET_IP_ALIGN); | |
337 | encx24j600_raw_read(priv, RRXDATA, skb_put(skb, rsv->len), rsv->len); | |
338 | ||
339 | if (netif_msg_pktdata(priv)) | |
340 | dump_packet("RX", skb->len, skb->data); | |
341 | ||
342 | skb->dev = dev; | |
343 | skb->protocol = eth_type_trans(skb, dev); | |
344 | skb->ip_summed = CHECKSUM_COMPLETE; | |
345 | ||
346 | /* Maintain stats */ | |
347 | dev->stats.rx_packets++; | |
348 | dev->stats.rx_bytes += rsv->len; | |
349 | priv->next_packet = rsv->next_packet; | |
350 | ||
351 | netif_rx(skb); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static void encx24j600_rx_packets(struct encx24j600_priv *priv, u8 packet_count) | |
357 | { | |
358 | struct net_device *dev = priv->ndev; | |
359 | ||
360 | while (packet_count--) { | |
361 | struct rsv rsv; | |
362 | u16 newrxtail; | |
363 | ||
364 | encx24j600_write_reg(priv, ERXRDPT, priv->next_packet); | |
365 | encx24j600_raw_read(priv, RRXDATA, (u8 *)&rsv, sizeof(rsv)); | |
366 | ||
367 | if (netif_msg_rx_status(priv)) | |
368 | encx24j600_dump_rsv(priv, __func__, &rsv); | |
369 | ||
370 | if (!RSV_GETBIT(rsv.rxstat, RSV_RXOK) || | |
371 | (rsv.len > MAX_FRAMELEN)) { | |
372 | netif_err(priv, rx_err, dev, "RX Error %04x\n", | |
373 | rsv.rxstat); | |
374 | dev->stats.rx_errors++; | |
375 | ||
376 | if (RSV_GETBIT(rsv.rxstat, RSV_CRCERROR)) | |
377 | dev->stats.rx_crc_errors++; | |
378 | if (RSV_GETBIT(rsv.rxstat, RSV_LENCHECKERR)) | |
379 | dev->stats.rx_frame_errors++; | |
380 | if (rsv.len > MAX_FRAMELEN) | |
381 | dev->stats.rx_over_errors++; | |
382 | } else { | |
383 | encx24j600_receive_packet(priv, &rsv); | |
384 | } | |
385 | ||
386 | newrxtail = priv->next_packet - 2; | |
387 | if (newrxtail == ENC_RX_BUF_START) | |
388 | newrxtail = SRAM_SIZE - 2; | |
389 | ||
390 | encx24j600_cmd(priv, SETPKTDEC); | |
391 | encx24j600_write_reg(priv, ERXTAIL, newrxtail); | |
392 | } | |
393 | } | |
394 | ||
395 | static irqreturn_t encx24j600_isr(int irq, void *dev_id) | |
396 | { | |
397 | struct encx24j600_priv *priv = dev_id; | |
398 | struct net_device *dev = priv->ndev; | |
399 | int eir; | |
400 | ||
401 | /* Clear interrupts */ | |
402 | encx24j600_cmd(priv, CLREIE); | |
403 | ||
404 | eir = encx24j600_read_reg(priv, EIR); | |
405 | ||
406 | if (eir & LINKIF) | |
407 | encx24j600_int_link_handler(priv); | |
408 | ||
409 | if (eir & TXIF) | |
410 | encx24j600_tx_complete(priv, false); | |
411 | ||
412 | if (eir & TXABTIF) | |
413 | encx24j600_tx_complete(priv, true); | |
414 | ||
415 | if (eir & RXABTIF) { | |
416 | if (eir & PCFULIF) { | |
417 | /* Packet counter is full */ | |
418 | netif_err(priv, rx_err, dev, "Packet counter full\n"); | |
419 | } | |
420 | dev->stats.rx_dropped++; | |
421 | encx24j600_clr_bits(priv, EIR, RXABTIF); | |
422 | } | |
423 | ||
424 | if (eir & PKTIF) { | |
425 | u8 packet_count; | |
426 | ||
427 | mutex_lock(&priv->lock); | |
428 | ||
429 | packet_count = encx24j600_read_reg(priv, ESTAT) & 0xff; | |
430 | while (packet_count) { | |
431 | encx24j600_rx_packets(priv, packet_count); | |
432 | packet_count = encx24j600_read_reg(priv, ESTAT) & 0xff; | |
433 | } | |
434 | ||
435 | mutex_unlock(&priv->lock); | |
436 | } | |
437 | ||
438 | /* Enable interrupts */ | |
439 | encx24j600_cmd(priv, SETEIE); | |
440 | ||
441 | return IRQ_HANDLED; | |
442 | } | |
443 | ||
444 | static int encx24j600_soft_reset(struct encx24j600_priv *priv) | |
445 | { | |
446 | int ret = 0; | |
447 | int timeout; | |
448 | u16 eudast; | |
449 | ||
450 | /* Write and verify a test value to EUDAST */ | |
451 | regcache_cache_bypass(priv->ctx.regmap, true); | |
452 | timeout = 10; | |
453 | do { | |
454 | encx24j600_write_reg(priv, EUDAST, EUDAST_TEST_VAL); | |
455 | eudast = encx24j600_read_reg(priv, EUDAST); | |
456 | usleep_range(25, 100); | |
457 | } while ((eudast != EUDAST_TEST_VAL) && --timeout); | |
458 | regcache_cache_bypass(priv->ctx.regmap, false); | |
459 | ||
460 | if (timeout == 0) { | |
461 | ret = -ETIMEDOUT; | |
462 | goto err_out; | |
463 | } | |
464 | ||
465 | /* Wait for CLKRDY to become set */ | |
466 | timeout = 10; | |
467 | while (!(encx24j600_read_reg(priv, ESTAT) & CLKRDY) && --timeout) | |
468 | usleep_range(25, 100); | |
469 | ||
470 | if (timeout == 0) { | |
471 | ret = -ETIMEDOUT; | |
472 | goto err_out; | |
473 | } | |
474 | ||
475 | /* Issue a System Reset command */ | |
476 | encx24j600_cmd(priv, SETETHRST); | |
477 | usleep_range(25, 100); | |
478 | ||
479 | /* Confirm that EUDAST has 0000h after system reset */ | |
480 | if (encx24j600_read_reg(priv, EUDAST) != 0) { | |
481 | ret = -EINVAL; | |
482 | goto err_out; | |
483 | } | |
484 | ||
485 | /* Wait for PHY register and status bits to become available */ | |
486 | usleep_range(256, 1000); | |
487 | ||
488 | err_out: | |
489 | return ret; | |
490 | } | |
491 | ||
492 | static int encx24j600_hw_reset(struct encx24j600_priv *priv) | |
493 | { | |
494 | int ret; | |
495 | ||
496 | mutex_lock(&priv->lock); | |
497 | ret = encx24j600_soft_reset(priv); | |
498 | mutex_unlock(&priv->lock); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | ||
503 | static void encx24j600_reset_hw_tx(struct encx24j600_priv *priv) | |
504 | { | |
505 | encx24j600_set_bits(priv, ECON2, TXRST); | |
506 | encx24j600_clr_bits(priv, ECON2, TXRST); | |
507 | } | |
508 | ||
509 | static void encx24j600_hw_init_tx(struct encx24j600_priv *priv) | |
510 | { | |
511 | /* Reset TX */ | |
512 | encx24j600_reset_hw_tx(priv); | |
513 | ||
514 | /* Clear the TXIF flag if were previously set */ | |
515 | encx24j600_clr_bits(priv, EIR, TXIF | TXABTIF); | |
516 | ||
517 | /* Write the Tx Buffer pointer */ | |
518 | encx24j600_write_reg(priv, EGPWRPT, ENC_TX_BUF_START); | |
519 | } | |
520 | ||
521 | static void encx24j600_hw_init_rx(struct encx24j600_priv *priv) | |
522 | { | |
523 | encx24j600_cmd(priv, DISABLERX); | |
524 | ||
525 | /* Set up RX packet start address in the SRAM */ | |
526 | encx24j600_write_reg(priv, ERXST, ENC_RX_BUF_START); | |
527 | ||
528 | /* Preload the RX Data pointer to the beginning of the RX area */ | |
529 | encx24j600_write_reg(priv, ERXRDPT, ENC_RX_BUF_START); | |
530 | ||
531 | priv->next_packet = ENC_RX_BUF_START; | |
532 | ||
533 | /* Set up RX end address in the SRAM */ | |
534 | encx24j600_write_reg(priv, ERXTAIL, ENC_SRAM_SIZE - 2); | |
535 | ||
536 | /* Reset the user data pointers */ | |
537 | encx24j600_write_reg(priv, EUDAST, ENC_SRAM_SIZE); | |
538 | encx24j600_write_reg(priv, EUDAND, ENC_SRAM_SIZE + 1); | |
539 | ||
540 | /* Set Max Frame length */ | |
541 | encx24j600_write_reg(priv, MAMXFL, MAX_FRAMELEN); | |
542 | } | |
543 | ||
544 | static void encx24j600_dump_config(struct encx24j600_priv *priv, | |
545 | const char *msg) | |
546 | { | |
547 | pr_info(DRV_NAME ": %s\n", msg); | |
548 | ||
549 | /* CHIP configuration */ | |
550 | pr_info(DRV_NAME " ECON1: %04X\n", encx24j600_read_reg(priv, ECON1)); | |
551 | pr_info(DRV_NAME " ECON2: %04X\n", encx24j600_read_reg(priv, ECON2)); | |
552 | pr_info(DRV_NAME " ERXFCON: %04X\n", encx24j600_read_reg(priv, | |
553 | ERXFCON)); | |
554 | pr_info(DRV_NAME " ESTAT: %04X\n", encx24j600_read_reg(priv, ESTAT)); | |
555 | pr_info(DRV_NAME " EIR: %04X\n", encx24j600_read_reg(priv, EIR)); | |
556 | pr_info(DRV_NAME " EIDLED: %04X\n", encx24j600_read_reg(priv, EIDLED)); | |
557 | ||
558 | /* MAC layer configuration */ | |
559 | pr_info(DRV_NAME " MACON1: %04X\n", encx24j600_read_reg(priv, MACON1)); | |
560 | pr_info(DRV_NAME " MACON2: %04X\n", encx24j600_read_reg(priv, MACON2)); | |
561 | pr_info(DRV_NAME " MAIPG: %04X\n", encx24j600_read_reg(priv, MAIPG)); | |
562 | pr_info(DRV_NAME " MACLCON: %04X\n", encx24j600_read_reg(priv, | |
563 | MACLCON)); | |
564 | pr_info(DRV_NAME " MABBIPG: %04X\n", encx24j600_read_reg(priv, | |
565 | MABBIPG)); | |
566 | ||
567 | /* PHY configuation */ | |
568 | pr_info(DRV_NAME " PHCON1: %04X\n", encx24j600_read_phy(priv, PHCON1)); | |
569 | pr_info(DRV_NAME " PHCON2: %04X\n", encx24j600_read_phy(priv, PHCON2)); | |
570 | pr_info(DRV_NAME " PHANA: %04X\n", encx24j600_read_phy(priv, PHANA)); | |
571 | pr_info(DRV_NAME " PHANLPA: %04X\n", encx24j600_read_phy(priv, | |
572 | PHANLPA)); | |
573 | pr_info(DRV_NAME " PHANE: %04X\n", encx24j600_read_phy(priv, PHANE)); | |
574 | pr_info(DRV_NAME " PHSTAT1: %04X\n", encx24j600_read_phy(priv, | |
575 | PHSTAT1)); | |
576 | pr_info(DRV_NAME " PHSTAT2: %04X\n", encx24j600_read_phy(priv, | |
577 | PHSTAT2)); | |
578 | pr_info(DRV_NAME " PHSTAT3: %04X\n", encx24j600_read_phy(priv, | |
579 | PHSTAT3)); | |
580 | } | |
581 | ||
582 | static void encx24j600_set_rxfilter_mode(struct encx24j600_priv *priv) | |
583 | { | |
584 | switch (priv->rxfilter) { | |
585 | case RXFILTER_PROMISC: | |
586 | encx24j600_set_bits(priv, MACON1, PASSALL); | |
587 | encx24j600_write_reg(priv, ERXFCON, UCEN | MCEN | NOTMEEN); | |
588 | break; | |
589 | case RXFILTER_MULTI: | |
590 | encx24j600_clr_bits(priv, MACON1, PASSALL); | |
591 | encx24j600_write_reg(priv, ERXFCON, UCEN | CRCEN | BCEN | MCEN); | |
592 | break; | |
593 | case RXFILTER_NORMAL: | |
594 | default: | |
595 | encx24j600_clr_bits(priv, MACON1, PASSALL); | |
596 | encx24j600_write_reg(priv, ERXFCON, UCEN | CRCEN | BCEN); | |
597 | break; | |
598 | } | |
599 | } | |
600 | ||
601 | static int encx24j600_hw_init(struct encx24j600_priv *priv) | |
602 | { | |
603 | struct net_device *dev = priv->ndev; | |
604 | int ret = 0; | |
605 | u16 eidled; | |
606 | u16 macon2; | |
607 | ||
608 | priv->hw_enabled = false; | |
609 | ||
610 | eidled = encx24j600_read_reg(priv, EIDLED); | |
611 | if (((eidled & DEVID_MASK) >> DEVID_SHIFT) != ENCX24J600_DEV_ID) { | |
612 | ret = -EINVAL; | |
613 | goto err_out; | |
614 | } | |
615 | ||
616 | netif_info(priv, drv, dev, "Silicon rev ID: 0x%02x\n", | |
617 | (eidled & REVID_MASK) >> REVID_SHIFT); | |
618 | ||
619 | /* PHY Leds: link status, | |
620 | * LEDA: Link + transmit/receive events | |
621 | * LEDB: Link State + colision events | |
622 | */ | |
623 | encx24j600_update_reg(priv, EIDLED, 0xbc00, 0xbc00); | |
624 | ||
625 | /* Loopback disabled */ | |
626 | encx24j600_write_reg(priv, MACON1, 0x9); | |
627 | ||
628 | /* interpacket gap value */ | |
629 | encx24j600_write_reg(priv, MAIPG, 0x0c12); | |
630 | ||
631 | /* Write the auto negotiation pattern */ | |
632 | encx24j600_write_phy(priv, PHANA, PHANA_DEFAULT); | |
633 | ||
634 | encx24j600_update_phcon1(priv); | |
635 | encx24j600_check_link_status(priv); | |
636 | ||
637 | macon2 = MACON2_RSV1 | TXCRCEN | PADCFG0 | PADCFG2 | MACON2_DEFER; | |
638 | if ((priv->autoneg == AUTONEG_DISABLE) && priv->full_duplex) | |
639 | macon2 |= FULDPX; | |
640 | ||
641 | encx24j600_set_bits(priv, MACON2, macon2); | |
642 | ||
643 | priv->rxfilter = RXFILTER_NORMAL; | |
644 | encx24j600_set_rxfilter_mode(priv); | |
645 | ||
646 | /* Program the Maximum frame length */ | |
647 | encx24j600_write_reg(priv, MAMXFL, MAX_FRAMELEN); | |
648 | ||
649 | /* Init Tx pointers */ | |
650 | encx24j600_hw_init_tx(priv); | |
651 | ||
652 | /* Init Rx pointers */ | |
653 | encx24j600_hw_init_rx(priv); | |
654 | ||
655 | if (netif_msg_hw(priv)) | |
656 | encx24j600_dump_config(priv, "Hw is initialized"); | |
657 | ||
658 | err_out: | |
659 | return ret; | |
660 | } | |
661 | ||
662 | static void encx24j600_hw_enable(struct encx24j600_priv *priv) | |
663 | { | |
664 | /* Clear the interrupt flags in case was set */ | |
665 | encx24j600_clr_bits(priv, EIR, (PCFULIF | RXABTIF | TXABTIF | TXIF | | |
666 | PKTIF | LINKIF)); | |
667 | ||
668 | /* Enable the interrupts */ | |
669 | encx24j600_write_reg(priv, EIE, (PCFULIE | RXABTIE | TXABTIE | TXIE | | |
670 | PKTIE | LINKIE | INTIE)); | |
671 | ||
672 | /* Enable RX */ | |
673 | encx24j600_cmd(priv, ENABLERX); | |
674 | ||
675 | priv->hw_enabled = true; | |
676 | } | |
677 | ||
678 | static void encx24j600_hw_disable(struct encx24j600_priv *priv) | |
679 | { | |
680 | /* Disable all interrupts */ | |
681 | encx24j600_write_reg(priv, EIE, 0); | |
682 | ||
683 | /* Disable RX */ | |
684 | encx24j600_cmd(priv, DISABLERX); | |
685 | ||
686 | priv->hw_enabled = false; | |
687 | } | |
688 | ||
689 | static int encx24j600_setlink(struct net_device *dev, u8 autoneg, u16 speed, | |
690 | u8 duplex) | |
691 | { | |
692 | struct encx24j600_priv *priv = netdev_priv(dev); | |
693 | int ret = 0; | |
694 | ||
695 | if (!priv->hw_enabled) { | |
696 | /* link is in low power mode now; duplex setting | |
697 | * will take effect on next encx24j600_hw_init() | |
698 | */ | |
699 | if (speed == SPEED_10 || speed == SPEED_100) { | |
700 | priv->autoneg = (autoneg == AUTONEG_ENABLE); | |
701 | priv->full_duplex = (duplex == DUPLEX_FULL); | |
702 | priv->speed = (speed == SPEED_100); | |
703 | } else { | |
704 | netif_warn(priv, link, dev, "unsupported link speed setting\n"); | |
705 | /*speeds other than SPEED_10 and SPEED_100 */ | |
706 | /*are not supported by chip */ | |
707 | ret = -EOPNOTSUPP; | |
708 | } | |
709 | } else { | |
710 | netif_warn(priv, link, dev, "Warning: hw must be disabled to set link mode\n"); | |
711 | ret = -EBUSY; | |
712 | } | |
713 | return ret; | |
714 | } | |
715 | ||
716 | static void encx24j600_hw_get_macaddr(struct encx24j600_priv *priv, | |
717 | unsigned char *ethaddr) | |
718 | { | |
719 | unsigned short val; | |
720 | ||
721 | val = encx24j600_read_reg(priv, MAADR1); | |
722 | ||
723 | ethaddr[0] = val & 0x00ff; | |
724 | ethaddr[1] = (val & 0xff00) >> 8; | |
725 | ||
726 | val = encx24j600_read_reg(priv, MAADR2); | |
727 | ||
728 | ethaddr[2] = val & 0x00ffU; | |
729 | ethaddr[3] = (val & 0xff00U) >> 8; | |
730 | ||
731 | val = encx24j600_read_reg(priv, MAADR3); | |
732 | ||
733 | ethaddr[4] = val & 0x00ffU; | |
734 | ethaddr[5] = (val & 0xff00U) >> 8; | |
735 | } | |
736 | ||
737 | /* Program the hardware MAC address from dev->dev_addr.*/ | |
738 | static int encx24j600_set_hw_macaddr(struct net_device *dev) | |
739 | { | |
740 | struct encx24j600_priv *priv = netdev_priv(dev); | |
741 | ||
742 | if (priv->hw_enabled) { | |
743 | netif_info(priv, drv, dev, "Hardware must be disabled to set Mac address\n"); | |
744 | return -EBUSY; | |
745 | } | |
746 | ||
747 | mutex_lock(&priv->lock); | |
748 | ||
749 | netif_info(priv, drv, dev, "%s: Setting MAC address to %pM\n", | |
750 | dev->name, dev->dev_addr); | |
751 | ||
752 | encx24j600_write_reg(priv, MAADR3, (dev->dev_addr[4] | | |
753 | dev->dev_addr[5] << 8)); | |
754 | encx24j600_write_reg(priv, MAADR2, (dev->dev_addr[2] | | |
755 | dev->dev_addr[3] << 8)); | |
756 | encx24j600_write_reg(priv, MAADR1, (dev->dev_addr[0] | | |
757 | dev->dev_addr[1] << 8)); | |
758 | ||
759 | mutex_unlock(&priv->lock); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | /* Store the new hardware address in dev->dev_addr, and update the MAC.*/ | |
765 | static int encx24j600_set_mac_address(struct net_device *dev, void *addr) | |
766 | { | |
767 | struct sockaddr *address = addr; | |
768 | ||
769 | if (netif_running(dev)) | |
770 | return -EBUSY; | |
771 | if (!is_valid_ether_addr(address->sa_data)) | |
772 | return -EADDRNOTAVAIL; | |
773 | ||
774 | memcpy(dev->dev_addr, address->sa_data, dev->addr_len); | |
775 | return encx24j600_set_hw_macaddr(dev); | |
776 | } | |
777 | ||
778 | static int encx24j600_open(struct net_device *dev) | |
779 | { | |
780 | struct encx24j600_priv *priv = netdev_priv(dev); | |
781 | ||
782 | int ret = request_threaded_irq(priv->ctx.spi->irq, NULL, encx24j600_isr, | |
783 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
784 | DRV_NAME, priv); | |
785 | if (unlikely(ret < 0)) { | |
786 | netdev_err(dev, "request irq %d failed (ret = %d)\n", | |
787 | priv->ctx.spi->irq, ret); | |
788 | return ret; | |
789 | } | |
790 | ||
791 | encx24j600_hw_disable(priv); | |
792 | encx24j600_hw_init(priv); | |
793 | encx24j600_hw_enable(priv); | |
794 | netif_start_queue(dev); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static int encx24j600_stop(struct net_device *dev) | |
800 | { | |
801 | struct encx24j600_priv *priv = netdev_priv(dev); | |
802 | ||
803 | netif_stop_queue(dev); | |
804 | free_irq(priv->ctx.spi->irq, priv); | |
805 | return 0; | |
806 | } | |
807 | ||
808 | static void encx24j600_setrx_proc(struct kthread_work *ws) | |
809 | { | |
810 | struct encx24j600_priv *priv = | |
811 | container_of(ws, struct encx24j600_priv, setrx_work); | |
812 | ||
813 | mutex_lock(&priv->lock); | |
814 | encx24j600_set_rxfilter_mode(priv); | |
815 | mutex_unlock(&priv->lock); | |
816 | } | |
817 | ||
818 | static void encx24j600_set_multicast_list(struct net_device *dev) | |
819 | { | |
820 | struct encx24j600_priv *priv = netdev_priv(dev); | |
821 | int oldfilter = priv->rxfilter; | |
822 | ||
823 | if (dev->flags & IFF_PROMISC) { | |
824 | netif_dbg(priv, link, dev, "promiscuous mode\n"); | |
825 | priv->rxfilter = RXFILTER_PROMISC; | |
826 | } else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) { | |
827 | netif_dbg(priv, link, dev, "%smulticast mode\n", | |
828 | (dev->flags & IFF_ALLMULTI) ? "all-" : ""); | |
829 | priv->rxfilter = RXFILTER_MULTI; | |
830 | } else { | |
831 | netif_dbg(priv, link, dev, "normal mode\n"); | |
832 | priv->rxfilter = RXFILTER_NORMAL; | |
833 | } | |
834 | ||
835 | if (oldfilter != priv->rxfilter) | |
836 | queue_kthread_work(&priv->kworker, &priv->setrx_work); | |
837 | } | |
838 | ||
839 | static void encx24j600_hw_tx(struct encx24j600_priv *priv) | |
840 | { | |
841 | struct net_device *dev = priv->ndev; | |
842 | netif_info(priv, tx_queued, dev, "TX Packet Len:%d\n", | |
843 | priv->tx_skb->len); | |
844 | ||
845 | if (netif_msg_pktdata(priv)) | |
846 | dump_packet("TX", priv->tx_skb->len, priv->tx_skb->data); | |
847 | ||
848 | if (encx24j600_read_reg(priv, EIR) & TXABTIF) | |
849 | /* Last transmition aborted due to error. Reset TX interface */ | |
850 | encx24j600_reset_hw_tx(priv); | |
851 | ||
852 | /* Clear the TXIF flag if were previously set */ | |
853 | encx24j600_clr_bits(priv, EIR, TXIF); | |
854 | ||
855 | /* Set the data pointer to the TX buffer address in the SRAM */ | |
856 | encx24j600_write_reg(priv, EGPWRPT, ENC_TX_BUF_START); | |
857 | ||
858 | /* Copy the packet into the SRAM */ | |
859 | encx24j600_raw_write(priv, WGPDATA, (u8 *)priv->tx_skb->data, | |
860 | priv->tx_skb->len); | |
861 | ||
862 | /* Program the Tx buffer start pointer */ | |
863 | encx24j600_write_reg(priv, ETXST, ENC_TX_BUF_START); | |
864 | ||
865 | /* Program the packet length */ | |
866 | encx24j600_write_reg(priv, ETXLEN, priv->tx_skb->len); | |
867 | ||
868 | /* Start the transmission */ | |
869 | encx24j600_cmd(priv, SETTXRTS); | |
870 | } | |
871 | ||
872 | static void encx24j600_tx_proc(struct kthread_work *ws) | |
873 | { | |
874 | struct encx24j600_priv *priv = | |
875 | container_of(ws, struct encx24j600_priv, tx_work); | |
876 | ||
877 | mutex_lock(&priv->lock); | |
878 | encx24j600_hw_tx(priv); | |
879 | mutex_unlock(&priv->lock); | |
880 | } | |
881 | ||
882 | static netdev_tx_t encx24j600_tx(struct sk_buff *skb, struct net_device *dev) | |
883 | { | |
884 | struct encx24j600_priv *priv = netdev_priv(dev); | |
885 | ||
886 | netif_stop_queue(dev); | |
887 | ||
888 | /* save the timestamp */ | |
889 | dev->trans_start = jiffies; | |
890 | ||
891 | /* Remember the skb for deferred processing */ | |
892 | priv->tx_skb = skb; | |
893 | ||
894 | queue_kthread_work(&priv->kworker, &priv->tx_work); | |
895 | ||
896 | return NETDEV_TX_OK; | |
897 | } | |
898 | ||
899 | /* Deal with a transmit timeout */ | |
900 | static void encx24j600_tx_timeout(struct net_device *dev) | |
901 | { | |
902 | struct encx24j600_priv *priv = netdev_priv(dev); | |
903 | ||
904 | netif_err(priv, tx_err, dev, "TX timeout at %ld, latency %ld\n", | |
905 | jiffies, jiffies - dev->trans_start); | |
906 | ||
907 | dev->stats.tx_errors++; | |
908 | netif_wake_queue(dev); | |
909 | return; | |
910 | } | |
911 | ||
912 | static int encx24j600_get_regs_len(struct net_device *dev) | |
913 | { | |
914 | return SFR_REG_COUNT; | |
915 | } | |
916 | ||
917 | static void encx24j600_get_regs(struct net_device *dev, | |
918 | struct ethtool_regs *regs, void *p) | |
919 | { | |
920 | struct encx24j600_priv *priv = netdev_priv(dev); | |
921 | u16 *buff = p; | |
922 | u8 reg; | |
923 | ||
924 | regs->version = 1; | |
925 | mutex_lock(&priv->lock); | |
926 | for (reg = 0; reg < SFR_REG_COUNT; reg += 2) { | |
927 | unsigned int val = 0; | |
928 | /* ignore errors for unreadable registers */ | |
929 | regmap_read(priv->ctx.regmap, reg, &val); | |
930 | buff[reg] = val & 0xffff; | |
931 | } | |
932 | mutex_unlock(&priv->lock); | |
933 | } | |
934 | ||
935 | static void encx24j600_get_drvinfo(struct net_device *dev, | |
936 | struct ethtool_drvinfo *info) | |
937 | { | |
938 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); | |
939 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
940 | strlcpy(info->bus_info, dev_name(dev->dev.parent), | |
941 | sizeof(info->bus_info)); | |
942 | } | |
943 | ||
944 | static int encx24j600_get_settings(struct net_device *dev, | |
945 | struct ethtool_cmd *cmd) | |
946 | { | |
947 | struct encx24j600_priv *priv = netdev_priv(dev); | |
948 | ||
949 | cmd->transceiver = XCVR_INTERNAL; | |
950 | cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
951 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
952 | SUPPORTED_Autoneg | SUPPORTED_TP; | |
953 | ||
954 | ethtool_cmd_speed_set(cmd, priv->speed); | |
955 | cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; | |
956 | cmd->port = PORT_TP; | |
957 | cmd->autoneg = priv->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE; | |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
962 | static int encx24j600_set_settings(struct net_device *dev, | |
963 | struct ethtool_cmd *cmd) | |
964 | { | |
965 | return encx24j600_setlink(dev, cmd->autoneg, | |
966 | ethtool_cmd_speed(cmd), cmd->duplex); | |
967 | } | |
968 | ||
969 | static u32 encx24j600_get_msglevel(struct net_device *dev) | |
970 | { | |
971 | struct encx24j600_priv *priv = netdev_priv(dev); | |
972 | return priv->msg_enable; | |
973 | } | |
974 | ||
975 | static void encx24j600_set_msglevel(struct net_device *dev, u32 val) | |
976 | { | |
977 | struct encx24j600_priv *priv = netdev_priv(dev); | |
978 | priv->msg_enable = val; | |
979 | } | |
980 | ||
981 | static const struct ethtool_ops encx24j600_ethtool_ops = { | |
982 | .get_settings = encx24j600_get_settings, | |
983 | .set_settings = encx24j600_set_settings, | |
984 | .get_drvinfo = encx24j600_get_drvinfo, | |
985 | .get_msglevel = encx24j600_get_msglevel, | |
986 | .set_msglevel = encx24j600_set_msglevel, | |
987 | .get_regs_len = encx24j600_get_regs_len, | |
988 | .get_regs = encx24j600_get_regs, | |
989 | }; | |
990 | ||
991 | static const struct net_device_ops encx24j600_netdev_ops = { | |
992 | .ndo_open = encx24j600_open, | |
993 | .ndo_stop = encx24j600_stop, | |
994 | .ndo_start_xmit = encx24j600_tx, | |
995 | .ndo_set_rx_mode = encx24j600_set_multicast_list, | |
996 | .ndo_set_mac_address = encx24j600_set_mac_address, | |
997 | .ndo_tx_timeout = encx24j600_tx_timeout, | |
998 | .ndo_validate_addr = eth_validate_addr, | |
999 | }; | |
1000 | ||
1001 | static int encx24j600_spi_probe(struct spi_device *spi) | |
1002 | { | |
1003 | int ret; | |
1004 | ||
1005 | struct net_device *ndev; | |
1006 | struct encx24j600_priv *priv; | |
1007 | ||
1008 | ndev = alloc_etherdev(sizeof(struct encx24j600_priv)); | |
1009 | ||
1010 | if (!ndev) { | |
1011 | ret = -ENOMEM; | |
1012 | goto error_out; | |
1013 | } | |
1014 | ||
1015 | priv = netdev_priv(ndev); | |
1016 | spi_set_drvdata(spi, priv); | |
1017 | dev_set_drvdata(&spi->dev, priv); | |
1018 | SET_NETDEV_DEV(ndev, &spi->dev); | |
1019 | ||
1020 | priv->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); | |
1021 | priv->ndev = ndev; | |
1022 | ||
1023 | /* Default configuration PHY configuration */ | |
1024 | priv->full_duplex = true; | |
1025 | priv->autoneg = AUTONEG_ENABLE; | |
1026 | priv->speed = SPEED_100; | |
1027 | ||
1028 | priv->ctx.spi = spi; | |
1029 | devm_regmap_init_encx24j600(&spi->dev, &priv->ctx); | |
1030 | ndev->irq = spi->irq; | |
1031 | ndev->netdev_ops = &encx24j600_netdev_ops; | |
1032 | ||
1033 | mutex_init(&priv->lock); | |
1034 | ||
1035 | /* Reset device and check if it is connected */ | |
1036 | if (encx24j600_hw_reset(priv)) { | |
1037 | netif_err(priv, probe, ndev, | |
1038 | DRV_NAME ": Chip is not detected\n"); | |
1039 | ret = -EIO; | |
1040 | goto out_free; | |
1041 | } | |
1042 | ||
1043 | /* Initialize the device HW to the consistent state */ | |
1044 | if (encx24j600_hw_init(priv)) { | |
1045 | netif_err(priv, probe, ndev, | |
1046 | DRV_NAME ": HW initialization error\n"); | |
1047 | ret = -EIO; | |
1048 | goto out_free; | |
1049 | } | |
1050 | ||
1051 | init_kthread_worker(&priv->kworker); | |
1052 | init_kthread_work(&priv->tx_work, encx24j600_tx_proc); | |
1053 | init_kthread_work(&priv->setrx_work, encx24j600_setrx_proc); | |
1054 | ||
1055 | priv->kworker_task = kthread_run(kthread_worker_fn, &priv->kworker, | |
1056 | "encx24j600"); | |
1057 | ||
1058 | if (IS_ERR(priv->kworker_task)) { | |
1059 | ret = PTR_ERR(priv->kworker_task); | |
1060 | goto out_free; | |
1061 | } | |
1062 | ||
1063 | /* Get the MAC address from the chip */ | |
1064 | encx24j600_hw_get_macaddr(priv, ndev->dev_addr); | |
1065 | ||
1066 | ndev->ethtool_ops = &encx24j600_ethtool_ops; | |
1067 | ||
1068 | ret = register_netdev(ndev); | |
1069 | if (unlikely(ret)) { | |
1070 | netif_err(priv, probe, ndev, "Error %d initializing card encx24j600 card\n", | |
1071 | ret); | |
1072 | goto out_free; | |
1073 | } | |
1074 | ||
1075 | netif_info(priv, drv, priv->ndev, "MAC address %pM\n", ndev->dev_addr); | |
1076 | ||
1077 | return ret; | |
1078 | ||
1079 | out_free: | |
1080 | free_netdev(ndev); | |
1081 | ||
1082 | error_out: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | static int encx24j600_spi_remove(struct spi_device *spi) | |
1087 | { | |
1088 | struct encx24j600_priv *priv = dev_get_drvdata(&spi->dev); | |
1089 | ||
1090 | unregister_netdev(priv->ndev); | |
1091 | ||
1092 | free_netdev(priv->ndev); | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static const struct spi_device_id encx24j600_spi_id_table = { | |
1098 | .name = "encx24j600" | |
1099 | }; | |
1100 | ||
1101 | static struct spi_driver encx24j600_spi_net_driver = { | |
1102 | .driver = { | |
1103 | .name = DRV_NAME, | |
1104 | .owner = THIS_MODULE, | |
1105 | .bus = &spi_bus_type, | |
1106 | }, | |
1107 | .probe = encx24j600_spi_probe, | |
1108 | .remove = encx24j600_spi_remove, | |
1109 | .id_table = &encx24j600_spi_id_table, | |
1110 | }; | |
1111 | ||
1112 | static int __init encx24j600_init(void) | |
1113 | { | |
1114 | return spi_register_driver(&encx24j600_spi_net_driver); | |
1115 | } | |
1116 | module_init(encx24j600_init); | |
1117 | ||
1118 | static void encx24j600_exit(void) | |
1119 | { | |
1120 | spi_unregister_driver(&encx24j600_spi_net_driver); | |
1121 | } | |
1122 | module_exit(encx24j600_exit); | |
1123 | ||
1124 | MODULE_DESCRIPTION(DRV_NAME " ethernet driver"); | |
1125 | MODULE_AUTHOR("Jon Ringle <jringle@gridpoint.com>"); | |
1126 | MODULE_LICENSE("GPL"); | |
1127 | MODULE_ALIAS("spi:" DRV_NAME); |