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ath79: ag71xx: Unify debug output with ar71xx and make debugging easier
[openwrt/openwrt.git] / target / linux / ath79 / files / drivers / net / ethernet / atheros / ag71xx / ag71xx_main.c
1 /*
2 * Atheros AR71xx built-in ethernet mac driver
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * Based on Atheros' AG7100 driver
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 */
13
14 #include <linux/sizes.h>
15 #include <linux/of_net.h>
16 #include <linux/of_address.h>
17 #include <linux/of_platform.h>
18 #include "ag71xx.h"
19
20 #define AG71XX_DEFAULT_MSG_ENABLE \
21 (NETIF_MSG_DRV \
22 | NETIF_MSG_PROBE \
23 | NETIF_MSG_LINK \
24 | NETIF_MSG_TIMER \
25 | NETIF_MSG_IFDOWN \
26 | NETIF_MSG_IFUP \
27 | NETIF_MSG_RX_ERR \
28 | NETIF_MSG_TX_ERR)
29
30 static int ag71xx_msg_level = -1;
31
32 module_param_named(msg_level, ag71xx_msg_level, int, 0);
33 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
34
35 #define ETH_SWITCH_HEADER_LEN 2
36
37 static int ag71xx_tx_packets(struct ag71xx *ag, bool flush);
38
39 static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
40 {
41 return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
42 }
43
44 static void ag71xx_dump_dma_regs(struct ag71xx *ag)
45 {
46 DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
47 ag->dev->name,
48 ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
49 ag71xx_rr(ag, AG71XX_REG_TX_DESC),
50 ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
51
52 DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
53 ag->dev->name,
54 ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
55 ag71xx_rr(ag, AG71XX_REG_RX_DESC),
56 ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
57 }
58
59 static void ag71xx_dump_regs(struct ag71xx *ag)
60 {
61 DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n",
62 ag->dev->name,
63 ag71xx_rr(ag, AG71XX_REG_MAC_CFG1),
64 ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
65 ag71xx_rr(ag, AG71XX_REG_MAC_IPG),
66 ag71xx_rr(ag, AG71XX_REG_MAC_HDX),
67 ag71xx_rr(ag, AG71XX_REG_MAC_MFL));
68 DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n",
69 ag->dev->name,
70 ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
71 ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1),
72 ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2));
73 DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n",
74 ag->dev->name,
75 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
76 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
77 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
78 DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n",
79 ag->dev->name,
80 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
81 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
82 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
83 }
84
85 static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
86 {
87 DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
88 ag->dev->name, label, intr,
89 (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
90 (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
91 (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
92 (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
93 (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
94 (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
95 }
96
97 static void ag71xx_ring_tx_clean(struct ag71xx *ag)
98 {
99 struct ag71xx_ring *ring = &ag->tx_ring;
100 struct net_device *dev = ag->dev;
101 int ring_mask = BIT(ring->order) - 1;
102 u32 bytes_compl = 0, pkts_compl = 0;
103
104 while (ring->curr != ring->dirty) {
105 struct ag71xx_desc *desc;
106 u32 i = ring->dirty & ring_mask;
107
108 desc = ag71xx_ring_desc(ring, i);
109 if (!ag71xx_desc_empty(desc)) {
110 desc->ctrl = 0;
111 dev->stats.tx_errors++;
112 }
113
114 if (ring->buf[i].skb) {
115 bytes_compl += ring->buf[i].len;
116 pkts_compl++;
117 dev_kfree_skb_any(ring->buf[i].skb);
118 }
119 ring->buf[i].skb = NULL;
120 ring->dirty++;
121 }
122
123 /* flush descriptors */
124 wmb();
125
126 netdev_completed_queue(dev, pkts_compl, bytes_compl);
127 }
128
129 static void ag71xx_ring_tx_init(struct ag71xx *ag)
130 {
131 struct ag71xx_ring *ring = &ag->tx_ring;
132 int ring_size = BIT(ring->order);
133 int ring_mask = ring_size - 1;
134 int i;
135
136 for (i = 0; i < ring_size; i++) {
137 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
138
139 desc->next = (u32) (ring->descs_dma +
140 AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
141
142 desc->ctrl = DESC_EMPTY;
143 ring->buf[i].skb = NULL;
144 }
145
146 /* flush descriptors */
147 wmb();
148
149 ring->curr = 0;
150 ring->dirty = 0;
151 netdev_reset_queue(ag->dev);
152 }
153
154 static void ag71xx_ring_rx_clean(struct ag71xx *ag)
155 {
156 struct ag71xx_ring *ring = &ag->rx_ring;
157 int ring_size = BIT(ring->order);
158 int i;
159
160 if (!ring->buf)
161 return;
162
163 for (i = 0; i < ring_size; i++)
164 if (ring->buf[i].rx_buf) {
165 dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr,
166 ag->rx_buf_size, DMA_FROM_DEVICE);
167 skb_free_frag(ring->buf[i].rx_buf);
168 }
169 }
170
171 static int ag71xx_buffer_size(struct ag71xx *ag)
172 {
173 return ag->rx_buf_size +
174 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
175 }
176
177 static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
178 int offset,
179 void *(*alloc)(unsigned int size))
180 {
181 struct ag71xx_ring *ring = &ag->rx_ring;
182 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]);
183 void *data;
184
185 data = alloc(ag71xx_buffer_size(ag));
186 if (!data)
187 return false;
188
189 buf->rx_buf = data;
190 buf->dma_addr = dma_map_single(&ag->dev->dev, data, ag->rx_buf_size,
191 DMA_FROM_DEVICE);
192 desc->data = (u32) buf->dma_addr + offset;
193 return true;
194 }
195
196 static int ag71xx_ring_rx_init(struct ag71xx *ag)
197 {
198 struct ag71xx_ring *ring = &ag->rx_ring;
199 int ring_size = BIT(ring->order);
200 int ring_mask = BIT(ring->order) - 1;
201 unsigned int i;
202 int ret;
203
204 ret = 0;
205 for (i = 0; i < ring_size; i++) {
206 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
207
208 desc->next = (u32) (ring->descs_dma +
209 AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
210
211 DBG("ag71xx: RX desc at %p, next is %08x\n",
212 desc, desc->next);
213 }
214
215 for (i = 0; i < ring_size; i++) {
216 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
217
218 if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], ag->rx_buf_offset,
219 netdev_alloc_frag)) {
220 ret = -ENOMEM;
221 break;
222 }
223
224 desc->ctrl = DESC_EMPTY;
225 }
226
227 /* flush descriptors */
228 wmb();
229
230 ring->curr = 0;
231 ring->dirty = 0;
232
233 return ret;
234 }
235
236 static int ag71xx_ring_rx_refill(struct ag71xx *ag)
237 {
238 struct ag71xx_ring *ring = &ag->rx_ring;
239 int ring_mask = BIT(ring->order) - 1;
240 unsigned int count;
241 int offset = ag->rx_buf_offset;
242
243 count = 0;
244 for (; ring->curr - ring->dirty > 0; ring->dirty++) {
245 struct ag71xx_desc *desc;
246 unsigned int i;
247
248 i = ring->dirty & ring_mask;
249 desc = ag71xx_ring_desc(ring, i);
250
251 if (!ring->buf[i].rx_buf &&
252 !ag71xx_fill_rx_buf(ag, &ring->buf[i], offset,
253 napi_alloc_frag))
254 break;
255
256 desc->ctrl = DESC_EMPTY;
257 count++;
258 }
259
260 /* flush descriptors */
261 wmb();
262
263 DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count);
264
265 return count;
266 }
267
268 static int ag71xx_rings_init(struct ag71xx *ag)
269 {
270 struct ag71xx_ring *tx = &ag->tx_ring;
271 struct ag71xx_ring *rx = &ag->rx_ring;
272 int ring_size = BIT(tx->order) + BIT(rx->order);
273 int tx_size = BIT(tx->order);
274
275 tx->buf = kzalloc(ring_size * sizeof(*tx->buf), GFP_KERNEL);
276 if (!tx->buf)
277 return -ENOMEM;
278
279 tx->descs_cpu = dma_alloc_coherent(NULL, ring_size * AG71XX_DESC_SIZE,
280 &tx->descs_dma, GFP_ATOMIC);
281 if (!tx->descs_cpu) {
282 kfree(tx->buf);
283 tx->buf = NULL;
284 return -ENOMEM;
285 }
286
287 rx->buf = &tx->buf[BIT(tx->order)];
288 rx->descs_cpu = ((void *)tx->descs_cpu) + tx_size * AG71XX_DESC_SIZE;
289 rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE;
290
291 ag71xx_ring_tx_init(ag);
292 return ag71xx_ring_rx_init(ag);
293 }
294
295 static void ag71xx_rings_free(struct ag71xx *ag)
296 {
297 struct ag71xx_ring *tx = &ag->tx_ring;
298 struct ag71xx_ring *rx = &ag->rx_ring;
299 int ring_size = BIT(tx->order) + BIT(rx->order);
300
301 if (tx->descs_cpu)
302 dma_free_coherent(NULL, ring_size * AG71XX_DESC_SIZE,
303 tx->descs_cpu, tx->descs_dma);
304
305 kfree(tx->buf);
306
307 tx->descs_cpu = NULL;
308 rx->descs_cpu = NULL;
309 tx->buf = NULL;
310 rx->buf = NULL;
311 }
312
313 static void ag71xx_rings_cleanup(struct ag71xx *ag)
314 {
315 ag71xx_ring_rx_clean(ag);
316 ag71xx_ring_tx_clean(ag);
317 ag71xx_rings_free(ag);
318
319 netdev_reset_queue(ag->dev);
320 }
321
322 static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
323 {
324 switch (ag->speed) {
325 case SPEED_1000:
326 return "1000";
327 case SPEED_100:
328 return "100";
329 case SPEED_10:
330 return "10";
331 }
332
333 return "?";
334 }
335
336 static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
337 {
338 u32 t;
339
340 t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16)
341 | (((u32) mac[3]) << 8) | ((u32) mac[2]);
342
343 ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
344
345 t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16);
346 ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
347 }
348
349 static void ag71xx_dma_reset(struct ag71xx *ag)
350 {
351 u32 val;
352 int i;
353
354 ag71xx_dump_dma_regs(ag);
355
356 /* stop RX and TX */
357 ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
358 ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
359
360 /*
361 * give the hardware some time to really stop all rx/tx activity
362 * clearing the descriptors too early causes random memory corruption
363 */
364 mdelay(1);
365
366 /* clear descriptor addresses */
367 ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma);
368 ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma);
369
370 /* clear pending RX/TX interrupts */
371 for (i = 0; i < 256; i++) {
372 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
373 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
374 }
375
376 /* clear pending errors */
377 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
378 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
379
380 val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
381 if (val)
382 pr_alert("%s: unable to clear DMA Rx status: %08x\n",
383 ag->dev->name, val);
384
385 val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
386
387 /* mask out reserved bits */
388 val &= ~0xff000000;
389
390 if (val)
391 pr_alert("%s: unable to clear DMA Tx status: %08x\n",
392 ag->dev->name, val);
393
394 ag71xx_dump_dma_regs(ag);
395 }
396
397 #define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \
398 MAC_CFG1_SRX | MAC_CFG1_STX)
399
400 #define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
401
402 #define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
403 FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
404 FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
405 FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
406 FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
407 FIFO_CFG4_VT)
408
409 #define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
410 FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
411 FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
412 FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
413 FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
414 FIFO_CFG5_17 | FIFO_CFG5_SF)
415
416 static void ag71xx_hw_stop(struct ag71xx *ag)
417 {
418 /* disable all interrupts and stop the rx/tx engine */
419 ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
420 ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
421 ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
422 }
423
424 static void ag71xx_hw_setup(struct ag71xx *ag)
425 {
426 struct device_node *np = ag->pdev->dev.of_node;
427 u32 init = MAC_CFG1_INIT;
428
429 /* setup MAC configuration registers */
430 if (of_property_read_bool(np, "flow-control"))
431 init |= MAC_CFG1_TFC | MAC_CFG1_RFC;
432 ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, init);
433
434 ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
435 MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
436
437 /* setup max frame length to zero */
438 ag71xx_wr(ag, AG71XX_REG_MAC_MFL, 0);
439
440 /* setup FIFO configuration registers */
441 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
442 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, ag->fifodata[0]);
443 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, ag->fifodata[1]);
444 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
445 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
446 }
447
448 static void ag71xx_hw_init(struct ag71xx *ag)
449 {
450 ag71xx_hw_stop(ag);
451
452 ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
453 udelay(20);
454
455 reset_control_assert(ag->mac_reset);
456 msleep(100);
457 reset_control_deassert(ag->mac_reset);
458 msleep(200);
459
460 ag71xx_hw_setup(ag);
461
462 ag71xx_dma_reset(ag);
463 }
464
465 static void ag71xx_fast_reset(struct ag71xx *ag)
466 {
467 struct net_device *dev = ag->dev;
468 u32 rx_ds;
469 u32 mii_reg;
470
471 ag71xx_hw_stop(ag);
472 wmb();
473
474 mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
475 rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
476
477 ag71xx_tx_packets(ag, true);
478
479 reset_control_assert(ag->mac_reset);
480 udelay(10);
481 reset_control_deassert(ag->mac_reset);
482 udelay(10);
483
484 ag71xx_dma_reset(ag);
485 ag71xx_hw_setup(ag);
486 ag->tx_ring.curr = 0;
487 ag->tx_ring.dirty = 0;
488 netdev_reset_queue(ag->dev);
489
490 /* setup max frame length */
491 ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
492 ag71xx_max_frame_len(ag->dev->mtu));
493
494 ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
495 ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
496 ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
497
498 ag71xx_hw_set_macaddr(ag, dev->dev_addr);
499 }
500
501 static void ag71xx_hw_start(struct ag71xx *ag)
502 {
503 /* start RX engine */
504 ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
505
506 /* enable interrupts */
507 ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
508
509 netif_wake_queue(ag->dev);
510 }
511
512 static void ath79_set_pllval(struct ag71xx *ag)
513 {
514 u32 pll_reg = ag->pllreg[1];
515 u32 pll_val;
516
517 if (!ag->pllregmap)
518 return;
519
520 switch (ag->speed) {
521 case SPEED_10:
522 pll_val = ag->plldata[2];
523 break;
524 case SPEED_100:
525 pll_val = ag->plldata[1];
526 break;
527 case SPEED_1000:
528 pll_val = ag->plldata[0];
529 break;
530 default:
531 BUG();
532 }
533
534 if (pll_val)
535 regmap_write(ag->pllregmap, pll_reg, pll_val);
536 }
537
538 static void ath79_set_pll(struct ag71xx *ag)
539 {
540 u32 pll_cfg = ag->pllreg[0];
541 u32 pll_shift = ag->pllreg[2];
542
543 if (!ag->pllregmap)
544 return;
545
546 regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 2 << pll_shift);
547 udelay(100);
548
549 ath79_set_pllval(ag);
550
551 regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 3 << pll_shift);
552 udelay(100);
553
554 regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 0);
555 udelay(100);
556 }
557
558 static void ath79_mii_ctrl_set_if(struct ag71xx *ag, unsigned int mii_if)
559 {
560 u32 t;
561
562 t = __raw_readl(ag->mii_base);
563 t &= ~(AR71XX_MII_CTRL_IF_MASK);
564 t |= (mii_if & AR71XX_MII_CTRL_IF_MASK);
565 __raw_writel(t, ag->mii_base);
566 }
567
568 static void ath79_mii0_ctrl_set_if(struct ag71xx *ag)
569 {
570 unsigned int mii_if;
571
572 switch (ag->phy_if_mode) {
573 case PHY_INTERFACE_MODE_MII:
574 mii_if = AR71XX_MII0_CTRL_IF_MII;
575 break;
576 case PHY_INTERFACE_MODE_GMII:
577 mii_if = AR71XX_MII0_CTRL_IF_GMII;
578 break;
579 case PHY_INTERFACE_MODE_RGMII:
580 mii_if = AR71XX_MII0_CTRL_IF_RGMII;
581 break;
582 case PHY_INTERFACE_MODE_RMII:
583 mii_if = AR71XX_MII0_CTRL_IF_RMII;
584 break;
585 default:
586 WARN(1, "Impossible PHY mode defined.\n");
587 return;
588 }
589
590 ath79_mii_ctrl_set_if(ag, mii_if);
591 }
592
593 static void ath79_mii1_ctrl_set_if(struct ag71xx *ag)
594 {
595 unsigned int mii_if;
596
597 switch (ag->phy_if_mode) {
598 case PHY_INTERFACE_MODE_RMII:
599 mii_if = AR71XX_MII1_CTRL_IF_RMII;
600 break;
601 case PHY_INTERFACE_MODE_RGMII:
602 mii_if = AR71XX_MII1_CTRL_IF_RGMII;
603 break;
604 default:
605 WARN(1, "Impossible PHY mode defined.\n");
606 return;
607 }
608
609 ath79_mii_ctrl_set_if(ag, mii_if);
610 }
611
612 static void ath79_mii_ctrl_set_speed(struct ag71xx *ag)
613 {
614 unsigned int mii_speed;
615 u32 t;
616
617 if (!ag->mii_base)
618 return;
619
620 switch (ag->speed) {
621 case SPEED_10:
622 mii_speed = AR71XX_MII_CTRL_SPEED_10;
623 break;
624 case SPEED_100:
625 mii_speed = AR71XX_MII_CTRL_SPEED_100;
626 break;
627 case SPEED_1000:
628 mii_speed = AR71XX_MII_CTRL_SPEED_1000;
629 break;
630 default:
631 BUG();
632 }
633
634 t = __raw_readl(ag->mii_base);
635 t &= ~(AR71XX_MII_CTRL_SPEED_MASK << AR71XX_MII_CTRL_SPEED_SHIFT);
636 t |= mii_speed << AR71XX_MII_CTRL_SPEED_SHIFT;
637 __raw_writel(t, ag->mii_base);
638 }
639
640 static void
641 __ag71xx_link_adjust(struct ag71xx *ag, bool update)
642 {
643 struct device_node *np = ag->pdev->dev.of_node;
644 u32 cfg2;
645 u32 ifctl;
646 u32 fifo5;
647
648 if (!ag->link && update) {
649 ag71xx_hw_stop(ag);
650 netif_carrier_off(ag->dev);
651 if (netif_msg_link(ag))
652 pr_info("%s: link down\n", ag->dev->name);
653 return;
654 }
655
656 if (!of_device_is_compatible(np, "qca,ar9130-eth") &&
657 !of_device_is_compatible(np, "qca,ar7100-eth"))
658 ag71xx_fast_reset(ag);
659
660 cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
661 cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
662 cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
663
664 ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
665 ifctl &= ~(MAC_IFCTL_SPEED);
666
667 fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
668 fifo5 &= ~FIFO_CFG5_BM;
669
670 switch (ag->speed) {
671 case SPEED_1000:
672 cfg2 |= MAC_CFG2_IF_1000;
673 fifo5 |= FIFO_CFG5_BM;
674 break;
675 case SPEED_100:
676 cfg2 |= MAC_CFG2_IF_10_100;
677 ifctl |= MAC_IFCTL_SPEED;
678 break;
679 case SPEED_10:
680 cfg2 |= MAC_CFG2_IF_10_100;
681 break;
682 default:
683 BUG();
684 return;
685 }
686
687 if (ag->tx_ring.desc_split) {
688 ag->fifodata[2] &= 0xffff;
689 ag->fifodata[2] |= ((2048 - ag->tx_ring.desc_split) / 4) << 16;
690 }
691
692 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, ag->fifodata[2]);
693
694 if (update) {
695 if (of_device_is_compatible(np, "qca,ar7100-eth") ||
696 of_device_is_compatible(np, "qca,ar9130-eth")) {
697 ath79_set_pll(ag);
698 ath79_mii_ctrl_set_speed(ag);
699 } else if (of_device_is_compatible(np, "qca,ar7242-eth") ||
700 of_device_is_compatible(np, "qca,ar9340-eth") ||
701 of_device_is_compatible(np, "qca,qca9550-eth") ||
702 of_device_is_compatible(np, "qca,qca9560-eth")) {
703 ath79_set_pllval(ag);
704 }
705 }
706
707 ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
708 ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
709 ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
710
711 if (of_device_is_compatible(np, "qca,qca9530-eth") ||
712 of_device_is_compatible(np, "qca,qca9560-eth")) {
713 /*
714 * The rx ring buffer can stall on small packets on QCA953x and
715 * QCA956x. Disabling the inline checksum engine fixes the stall.
716 * The wr, rr functions cannot be used since this hidden register
717 * is outside of the normal ag71xx register block.
718 */
719 void __iomem *dam = ioremap_nocache(0xb90001bc, 0x4);
720 if (dam) {
721 __raw_writel(__raw_readl(dam) & ~BIT(27), dam);
722 (void)__raw_readl(dam);
723 iounmap(dam);
724 }
725 }
726
727 ag71xx_hw_start(ag);
728
729 netif_carrier_on(ag->dev);
730 if (update && netif_msg_link(ag))
731 pr_info("%s: link up (%sMbps/%s duplex)\n",
732 ag->dev->name,
733 ag71xx_speed_str(ag),
734 (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
735
736 ag71xx_dump_regs(ag);
737 }
738
739 void ag71xx_link_adjust(struct ag71xx *ag)
740 {
741 __ag71xx_link_adjust(ag, true);
742 }
743
744 static int ag71xx_hw_enable(struct ag71xx *ag)
745 {
746 int ret;
747
748 ret = ag71xx_rings_init(ag);
749 if (ret)
750 return ret;
751
752 napi_enable(&ag->napi);
753 ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
754 ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma);
755 netif_start_queue(ag->dev);
756
757 return 0;
758 }
759
760 static void ag71xx_hw_disable(struct ag71xx *ag)
761 {
762 unsigned long flags;
763
764 spin_lock_irqsave(&ag->lock, flags);
765
766 netif_stop_queue(ag->dev);
767
768 ag71xx_hw_stop(ag);
769 ag71xx_dma_reset(ag);
770
771 napi_disable(&ag->napi);
772 del_timer_sync(&ag->oom_timer);
773
774 spin_unlock_irqrestore(&ag->lock, flags);
775
776 ag71xx_rings_cleanup(ag);
777 }
778
779 static int ag71xx_open(struct net_device *dev)
780 {
781 struct ag71xx *ag = netdev_priv(dev);
782 unsigned int max_frame_len;
783 int ret;
784
785 netif_carrier_off(dev);
786 max_frame_len = ag71xx_max_frame_len(dev->mtu);
787 ag->rx_buf_size = SKB_DATA_ALIGN(max_frame_len + NET_SKB_PAD + NET_IP_ALIGN);
788
789 /* setup max frame length */
790 ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len);
791 ag71xx_hw_set_macaddr(ag, dev->dev_addr);
792
793 ret = ag71xx_hw_enable(ag);
794 if (ret)
795 goto err;
796
797 phy_start(ag->phy_dev);
798
799 return 0;
800
801 err:
802 ag71xx_rings_cleanup(ag);
803 return ret;
804 }
805
806 static int ag71xx_stop(struct net_device *dev)
807 {
808 struct ag71xx *ag = netdev_priv(dev);
809
810 netif_carrier_off(dev);
811 phy_stop(ag->phy_dev);
812 ag71xx_hw_disable(ag);
813
814 return 0;
815 }
816
817 static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
818 {
819 int i;
820 struct ag71xx_desc *desc;
821 int ring_mask = BIT(ring->order) - 1;
822 int ndesc = 0;
823 int split = ring->desc_split;
824
825 if (!split)
826 split = len;
827
828 while (len > 0) {
829 unsigned int cur_len = len;
830
831 i = (ring->curr + ndesc) & ring_mask;
832 desc = ag71xx_ring_desc(ring, i);
833
834 if (!ag71xx_desc_empty(desc))
835 return -1;
836
837 if (cur_len > split) {
838 cur_len = split;
839
840 /*
841 * TX will hang if DMA transfers <= 4 bytes,
842 * make sure next segment is more than 4 bytes long.
843 */
844 if (len <= split + 4)
845 cur_len -= 4;
846 }
847
848 desc->data = addr;
849 addr += cur_len;
850 len -= cur_len;
851
852 if (len > 0)
853 cur_len |= DESC_MORE;
854
855 /* prevent early tx attempt of this descriptor */
856 if (!ndesc)
857 cur_len |= DESC_EMPTY;
858
859 desc->ctrl = cur_len;
860 ndesc++;
861 }
862
863 return ndesc;
864 }
865
866 static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
867 struct net_device *dev)
868 {
869 struct ag71xx *ag = netdev_priv(dev);
870 struct ag71xx_ring *ring = &ag->tx_ring;
871 int ring_mask = BIT(ring->order) - 1;
872 int ring_size = BIT(ring->order);
873 struct ag71xx_desc *desc;
874 dma_addr_t dma_addr;
875 int i, n, ring_min;
876
877 if (skb->len <= 4) {
878 DBG("%s: packet len is too small\n", ag->dev->name);
879 goto err_drop;
880 }
881
882 dma_addr = dma_map_single(&dev->dev, skb->data, skb->len,
883 DMA_TO_DEVICE);
884
885 i = ring->curr & ring_mask;
886 desc = ag71xx_ring_desc(ring, i);
887
888 /* setup descriptor fields */
889 n = ag71xx_fill_dma_desc(ring, (u32) dma_addr, skb->len & ag->desc_pktlen_mask);
890 if (n < 0)
891 goto err_drop_unmap;
892
893 i = (ring->curr + n - 1) & ring_mask;
894 ring->buf[i].len = skb->len;
895 ring->buf[i].skb = skb;
896
897 netdev_sent_queue(dev, skb->len);
898
899 skb_tx_timestamp(skb);
900
901 desc->ctrl &= ~DESC_EMPTY;
902 ring->curr += n;
903
904 /* flush descriptor */
905 wmb();
906
907 ring_min = 2;
908 if (ring->desc_split)
909 ring_min *= AG71XX_TX_RING_DS_PER_PKT;
910
911 if (ring->curr - ring->dirty >= ring_size - ring_min) {
912 DBG("%s: tx queue full\n", dev->name);
913 netif_stop_queue(dev);
914 }
915
916 DBG("%s: packet injected into TX queue\n", ag->dev->name);
917
918 /* enable TX engine */
919 ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE);
920
921 return NETDEV_TX_OK;
922
923 err_drop_unmap:
924 dma_unmap_single(&dev->dev, dma_addr, skb->len, DMA_TO_DEVICE);
925
926 err_drop:
927 dev->stats.tx_dropped++;
928
929 dev_kfree_skb(skb);
930 return NETDEV_TX_OK;
931 }
932
933 static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
934 {
935 struct ag71xx *ag = netdev_priv(dev);
936 int ret;
937
938 switch (cmd) {
939 case SIOCETHTOOL:
940 if (ag->phy_dev == NULL)
941 break;
942
943 spin_lock_irq(&ag->lock);
944 ret = phy_ethtool_ioctl(ag->phy_dev, (void *) ifr->ifr_data);
945 spin_unlock_irq(&ag->lock);
946 return ret;
947
948 case SIOCSIFHWADDR:
949 if (copy_from_user
950 (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr)))
951 return -EFAULT;
952 return 0;
953
954 case SIOCGIFHWADDR:
955 if (copy_to_user
956 (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr)))
957 return -EFAULT;
958 return 0;
959
960 case SIOCGMIIPHY:
961 case SIOCGMIIREG:
962 case SIOCSMIIREG:
963 if (ag->phy_dev == NULL)
964 break;
965
966 return phy_mii_ioctl(ag->phy_dev, ifr, cmd);
967
968 default:
969 break;
970 }
971
972 return -EOPNOTSUPP;
973 }
974
975 static void ag71xx_oom_timer_handler(unsigned long data)
976 {
977 struct net_device *dev = (struct net_device *) data;
978 struct ag71xx *ag = netdev_priv(dev);
979
980 napi_schedule(&ag->napi);
981 }
982
983 static void ag71xx_tx_timeout(struct net_device *dev)
984 {
985 struct ag71xx *ag = netdev_priv(dev);
986
987 if (netif_msg_tx_err(ag))
988 pr_info("%s: tx timeout\n", ag->dev->name);
989
990 schedule_delayed_work(&ag->restart_work, 1);
991 }
992
993 static void ag71xx_restart_work_func(struct work_struct *work)
994 {
995 struct ag71xx *ag = container_of(work, struct ag71xx, restart_work.work);
996
997 rtnl_lock();
998 ag71xx_hw_disable(ag);
999 ag71xx_hw_enable(ag);
1000 if (ag->link)
1001 __ag71xx_link_adjust(ag, false);
1002 rtnl_unlock();
1003 }
1004
1005 static bool ag71xx_check_dma_stuck(struct ag71xx *ag)
1006 {
1007 unsigned long timestamp;
1008 u32 rx_sm, tx_sm, rx_fd;
1009
1010 timestamp = netdev_get_tx_queue(ag->dev, 0)->trans_start;
1011 if (likely(time_before(jiffies, timestamp + HZ/10)))
1012 return false;
1013
1014 if (!netif_carrier_ok(ag->dev))
1015 return false;
1016
1017 rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM);
1018 if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6)
1019 return true;
1020
1021 tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM);
1022 rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH);
1023 if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) &&
1024 ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0)
1025 return true;
1026
1027 return false;
1028 }
1029
1030 static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
1031 {
1032 struct ag71xx_ring *ring = &ag->tx_ring;
1033 bool dma_stuck = false;
1034 int ring_mask = BIT(ring->order) - 1;
1035 int ring_size = BIT(ring->order);
1036 int sent = 0;
1037 int bytes_compl = 0;
1038 int n = 0;
1039
1040 DBG("%s: processing TX ring\n", ag->dev->name);
1041
1042 while (ring->dirty + n != ring->curr) {
1043 unsigned int i = (ring->dirty + n) & ring_mask;
1044 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
1045 struct sk_buff *skb = ring->buf[i].skb;
1046
1047 if (!flush && !ag71xx_desc_empty(desc)) {
1048 if (ag->tx_hang_workaround &&
1049 ag71xx_check_dma_stuck(ag)) {
1050 schedule_delayed_work(&ag->restart_work, HZ / 2);
1051 dma_stuck = true;
1052 }
1053 break;
1054 }
1055
1056 if (flush)
1057 desc->ctrl |= DESC_EMPTY;
1058
1059 n++;
1060 if (!skb)
1061 continue;
1062
1063 dev_kfree_skb_any(skb);
1064 ring->buf[i].skb = NULL;
1065
1066 bytes_compl += ring->buf[i].len;
1067
1068 sent++;
1069 ring->dirty += n;
1070
1071 while (n > 0) {
1072 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
1073 n--;
1074 }
1075 }
1076
1077 DBG("%s: %d packets sent out\n", ag->dev->name, sent);
1078
1079 if (!sent)
1080 return 0;
1081
1082 ag->dev->stats.tx_bytes += bytes_compl;
1083 ag->dev->stats.tx_packets += sent;
1084
1085 netdev_completed_queue(ag->dev, sent, bytes_compl);
1086 if ((ring->curr - ring->dirty) < (ring_size * 3) / 4)
1087 netif_wake_queue(ag->dev);
1088
1089 if (!dma_stuck)
1090 cancel_delayed_work(&ag->restart_work);
1091
1092 return sent;
1093 }
1094
1095 static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
1096 {
1097 struct net_device *dev = ag->dev;
1098 struct ag71xx_ring *ring = &ag->rx_ring;
1099 unsigned int pktlen_mask = ag->desc_pktlen_mask;
1100 unsigned int offset = ag->rx_buf_offset;
1101 int ring_mask = BIT(ring->order) - 1;
1102 int ring_size = BIT(ring->order);
1103 struct sk_buff_head queue;
1104 struct sk_buff *skb;
1105 int done = 0;
1106
1107 DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
1108 dev->name, limit, ring->curr, ring->dirty);
1109
1110 skb_queue_head_init(&queue);
1111
1112 while (done < limit) {
1113 unsigned int i = ring->curr & ring_mask;
1114 struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
1115 int pktlen;
1116 int err = 0;
1117
1118 if (ag71xx_desc_empty(desc))
1119 break;
1120
1121 if ((ring->dirty + ring_size) == ring->curr) {
1122 ag71xx_assert(0);
1123 break;
1124 }
1125
1126 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
1127
1128 pktlen = desc->ctrl & pktlen_mask;
1129 pktlen -= ETH_FCS_LEN;
1130
1131 dma_unmap_single(&dev->dev, ring->buf[i].dma_addr,
1132 ag->rx_buf_size, DMA_FROM_DEVICE);
1133
1134 dev->stats.rx_packets++;
1135 dev->stats.rx_bytes += pktlen;
1136
1137 skb = build_skb(ring->buf[i].rx_buf, ag71xx_buffer_size(ag));
1138 if (!skb) {
1139 skb_free_frag(ring->buf[i].rx_buf);
1140 goto next;
1141 }
1142
1143 skb_reserve(skb, offset);
1144 skb_put(skb, pktlen);
1145
1146 if (err) {
1147 dev->stats.rx_dropped++;
1148 kfree_skb(skb);
1149 } else {
1150 skb->dev = dev;
1151 skb->ip_summed = CHECKSUM_NONE;
1152 __skb_queue_tail(&queue, skb);
1153 }
1154
1155 next:
1156 ring->buf[i].rx_buf = NULL;
1157 done++;
1158
1159 ring->curr++;
1160 }
1161
1162 ag71xx_ring_rx_refill(ag);
1163
1164 while ((skb = __skb_dequeue(&queue)) != NULL) {
1165 skb->protocol = eth_type_trans(skb, dev);
1166 netif_receive_skb(skb);
1167 }
1168
1169 DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n",
1170 dev->name, ring->curr, ring->dirty, done);
1171
1172 return done;
1173 }
1174
1175 static int ag71xx_poll(struct napi_struct *napi, int limit)
1176 {
1177 struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
1178 struct net_device *dev = ag->dev;
1179 struct ag71xx_ring *rx_ring = &ag->rx_ring;
1180 int rx_ring_size = BIT(rx_ring->order);
1181 unsigned long flags;
1182 u32 status;
1183 int tx_done;
1184 int rx_done;
1185
1186 tx_done = ag71xx_tx_packets(ag, false);
1187
1188 DBG("%s: processing RX ring\n", dev->name);
1189 rx_done = ag71xx_rx_packets(ag, limit);
1190
1191 ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done);
1192
1193 if (rx_ring->buf[rx_ring->dirty % rx_ring_size].rx_buf == NULL)
1194 goto oom;
1195
1196 status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
1197 if (unlikely(status & RX_STATUS_OF)) {
1198 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
1199 dev->stats.rx_fifo_errors++;
1200
1201 /* restart RX */
1202 ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
1203 }
1204
1205 if (rx_done < limit) {
1206 if (status & RX_STATUS_PR)
1207 goto more;
1208
1209 status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
1210 if (status & TX_STATUS_PS)
1211 goto more;
1212
1213 DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n",
1214 dev->name, rx_done, tx_done, limit);
1215
1216 napi_complete(napi);
1217
1218 /* enable interrupts */
1219 spin_lock_irqsave(&ag->lock, flags);
1220 ag71xx_int_enable(ag, AG71XX_INT_POLL);
1221 spin_unlock_irqrestore(&ag->lock, flags);
1222 return rx_done;
1223 }
1224
1225 more:
1226 DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n",
1227 dev->name, rx_done, tx_done, limit);
1228 return limit;
1229
1230 oom:
1231 if (netif_msg_rx_err(ag))
1232 pr_info("%s: out of memory\n", dev->name);
1233
1234 mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
1235 napi_complete(napi);
1236 return 0;
1237 }
1238
1239 static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
1240 {
1241 struct net_device *dev = dev_id;
1242 struct ag71xx *ag = netdev_priv(dev);
1243 u32 status;
1244
1245 status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
1246 ag71xx_dump_intr(ag, "raw", status);
1247
1248 if (unlikely(!status))
1249 return IRQ_NONE;
1250
1251 if (unlikely(status & AG71XX_INT_ERR)) {
1252 if (status & AG71XX_INT_TX_BE) {
1253 ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE);
1254 dev_err(&dev->dev, "TX BUS error\n");
1255 }
1256 if (status & AG71XX_INT_RX_BE) {
1257 ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE);
1258 dev_err(&dev->dev, "RX BUS error\n");
1259 }
1260 }
1261
1262 if (likely(status & AG71XX_INT_POLL)) {
1263 ag71xx_int_disable(ag, AG71XX_INT_POLL);
1264 DBG("%s: enable polling mode\n", dev->name);
1265 napi_schedule(&ag->napi);
1266 }
1267
1268 ag71xx_debugfs_update_int_stats(ag, status);
1269
1270 return IRQ_HANDLED;
1271 }
1272
1273 #ifdef CONFIG_NET_POLL_CONTROLLER
1274 /*
1275 * Polling 'interrupt' - used by things like netconsole to send skbs
1276 * without having to re-enable interrupts. It's not called while
1277 * the interrupt routine is executing.
1278 */
1279 static void ag71xx_netpoll(struct net_device *dev)
1280 {
1281 disable_irq(dev->irq);
1282 ag71xx_interrupt(dev->irq, dev);
1283 enable_irq(dev->irq);
1284 }
1285 #endif
1286
1287 static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
1288 {
1289 struct ag71xx *ag = netdev_priv(dev);
1290
1291 dev->mtu = new_mtu;
1292 ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
1293 ag71xx_max_frame_len(dev->mtu));
1294
1295 return 0;
1296 }
1297
1298 static const struct net_device_ops ag71xx_netdev_ops = {
1299 .ndo_open = ag71xx_open,
1300 .ndo_stop = ag71xx_stop,
1301 .ndo_start_xmit = ag71xx_hard_start_xmit,
1302 .ndo_do_ioctl = ag71xx_do_ioctl,
1303 .ndo_tx_timeout = ag71xx_tx_timeout,
1304 .ndo_change_mtu = ag71xx_change_mtu,
1305 .ndo_set_mac_address = eth_mac_addr,
1306 .ndo_validate_addr = eth_validate_addr,
1307 #ifdef CONFIG_NET_POLL_CONTROLLER
1308 .ndo_poll_controller = ag71xx_netpoll,
1309 #endif
1310 };
1311
1312 static const char *ag71xx_get_phy_if_mode_name(phy_interface_t mode)
1313 {
1314 switch (mode) {
1315 case PHY_INTERFACE_MODE_MII:
1316 return "MII";
1317 case PHY_INTERFACE_MODE_GMII:
1318 return "GMII";
1319 case PHY_INTERFACE_MODE_RMII:
1320 return "RMII";
1321 case PHY_INTERFACE_MODE_RGMII:
1322 return "RGMII";
1323 case PHY_INTERFACE_MODE_SGMII:
1324 return "SGMII";
1325 default:
1326 break;
1327 }
1328
1329 return "unknown";
1330 }
1331
1332 static int ag71xx_probe(struct platform_device *pdev)
1333 {
1334 struct device_node *np = pdev->dev.of_node;
1335 struct device_node *mdio_node;
1336 struct net_device *dev;
1337 struct resource *res;
1338 struct ag71xx *ag;
1339 const void *mac_addr;
1340 u32 max_frame_len;
1341 int tx_size, err;
1342
1343 if (!np)
1344 return -ENODEV;
1345
1346 dev = alloc_etherdev(sizeof(*ag));
1347 if (!dev)
1348 return -ENOMEM;
1349
1350 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1351 if (!res)
1352 return -EINVAL;
1353
1354 err = ag71xx_setup_gmac(np);
1355 if (err)
1356 return err;
1357
1358 SET_NETDEV_DEV(dev, &pdev->dev);
1359
1360 ag = netdev_priv(dev);
1361 ag->pdev = pdev;
1362 ag->dev = dev;
1363 ag->msg_enable = netif_msg_init(ag71xx_msg_level,
1364 AG71XX_DEFAULT_MSG_ENABLE);
1365 spin_lock_init(&ag->lock);
1366
1367 ag->mac_reset = devm_reset_control_get(&pdev->dev, "mac");
1368 if (IS_ERR(ag->mac_reset)) {
1369 dev_err(&pdev->dev, "missing mac reset\n");
1370 err = PTR_ERR(ag->mac_reset);
1371 goto err_free;
1372 }
1373
1374 if (of_property_read_u32_array(np, "fifo-data", ag->fifodata, 3)) {
1375 if (of_device_is_compatible(np, "qca,ar9130-eth") ||
1376 of_device_is_compatible(np, "qca,ar7100-eth")) {
1377 ag->fifodata[0] = 0x0fff0000;
1378 ag->fifodata[1] = 0x00001fff;
1379 } else {
1380 ag->fifodata[0] = 0x0010ffff;
1381 ag->fifodata[1] = 0x015500aa;
1382 ag->fifodata[2] = 0x01f00140;
1383 }
1384 if (of_device_is_compatible(np, "qca,ar9130-eth"))
1385 ag->fifodata[2] = 0x00780fff;
1386 else if (of_device_is_compatible(np, "qca,ar7100-eth"))
1387 ag->fifodata[2] = 0x008001ff;
1388 }
1389
1390 if (of_property_read_u32_array(np, "pll-data", ag->plldata, 3))
1391 dev_dbg(&pdev->dev, "failed to read pll-data property\n");
1392
1393 if (of_property_read_u32_array(np, "pll-reg", ag->pllreg, 3))
1394 dev_dbg(&pdev->dev, "failed to read pll-reg property\n");
1395
1396 ag->pllregmap = syscon_regmap_lookup_by_phandle(np, "pll-handle");
1397 if (IS_ERR(ag->pllregmap)) {
1398 dev_dbg(&pdev->dev, "failed to read pll-handle property\n");
1399 ag->pllregmap = NULL;
1400 }
1401
1402 ag->mac_base = devm_ioremap_nocache(&pdev->dev, res->start,
1403 res->end - res->start + 1);
1404 if (!ag->mac_base) {
1405 err = -ENOMEM;
1406 goto err_free;
1407 }
1408 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1409 if (res) {
1410 ag->mii_base = devm_ioremap_nocache(&pdev->dev, res->start,
1411 res->end - res->start + 1);
1412 if (!ag->mii_base) {
1413 err = -ENOMEM;
1414 goto err_free;
1415 }
1416 }
1417
1418 dev->irq = platform_get_irq(pdev, 0);
1419 err = devm_request_irq(&pdev->dev, dev->irq, ag71xx_interrupt,
1420 0x0, dev_name(&pdev->dev), dev);
1421 if (err) {
1422 dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq);
1423 goto err_free;
1424 }
1425
1426 dev->netdev_ops = &ag71xx_netdev_ops;
1427 dev->ethtool_ops = &ag71xx_ethtool_ops;
1428
1429 INIT_DELAYED_WORK(&ag->restart_work, ag71xx_restart_work_func);
1430
1431 init_timer(&ag->oom_timer);
1432 ag->oom_timer.data = (unsigned long) dev;
1433 ag->oom_timer.function = ag71xx_oom_timer_handler;
1434
1435 tx_size = AG71XX_TX_RING_SIZE_DEFAULT;
1436 ag->rx_ring.order = ag71xx_ring_size_order(AG71XX_RX_RING_SIZE_DEFAULT);
1437
1438 if (of_device_is_compatible(np, "qca,ar9340-eth") ||
1439 of_device_is_compatible(np, "qca,qca9530-eth") ||
1440 of_device_is_compatible(np, "qca,qca9550-eth") ||
1441 of_device_is_compatible(np, "qca,qca9560-eth"))
1442 ag->desc_pktlen_mask = SZ_16K - 1;
1443 else
1444 ag->desc_pktlen_mask = SZ_4K - 1;
1445
1446 if (ag->desc_pktlen_mask == SZ_16K - 1 &&
1447 !of_device_is_compatible(np, "qca,qca9550-eth") &&
1448 !of_device_is_compatible(np, "qca,qca9560-eth"))
1449 max_frame_len = ag->desc_pktlen_mask;
1450 else
1451 max_frame_len = 1540;
1452
1453 dev->min_mtu = 68;
1454 dev->max_mtu = max_frame_len - ag71xx_max_frame_len(0);
1455
1456 if (of_device_is_compatible(np, "qca,ar7240-eth"))
1457 ag->tx_hang_workaround = 1;
1458
1459 ag->rx_buf_offset = NET_SKB_PAD;
1460 if (!of_device_is_compatible(np, "qca,ar7100-eth") &&
1461 !of_device_is_compatible(np, "qca,ar9130-eth"))
1462 ag->rx_buf_offset += NET_IP_ALIGN;
1463
1464 if (of_device_is_compatible(np, "qca,ar7100-eth")) {
1465 ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT;
1466 tx_size *= AG71XX_TX_RING_DS_PER_PKT;
1467 }
1468 ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
1469
1470 ag->stop_desc = dmam_alloc_coherent(&pdev->dev,
1471 sizeof(struct ag71xx_desc),
1472 &ag->stop_desc_dma, GFP_KERNEL);
1473 if (!ag->stop_desc)
1474 goto err_free;
1475
1476 ag->stop_desc->data = 0;
1477 ag->stop_desc->ctrl = 0;
1478 ag->stop_desc->next = (u32) ag->stop_desc_dma;
1479
1480 mac_addr = of_get_mac_address(np);
1481 if (mac_addr)
1482 memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
1483 if (!mac_addr || !is_valid_ether_addr(dev->dev_addr)) {
1484 dev_err(&pdev->dev, "invalid MAC address, using random address\n");
1485 eth_random_addr(dev->dev_addr);
1486 }
1487
1488 ag->phy_if_mode = of_get_phy_mode(np);
1489 if (ag->phy_if_mode < 0) {
1490 dev_err(&pdev->dev, "missing phy-mode property in DT\n");
1491 err = ag->phy_if_mode;
1492 goto err_free;
1493 }
1494
1495 if (of_property_read_u32(np, "qca,mac-idx", &ag->mac_idx))
1496 ag->mac_idx = -1;
1497 if (ag->mii_base)
1498 switch (ag->mac_idx) {
1499 case 0:
1500 ath79_mii0_ctrl_set_if(ag);
1501 break;
1502 case 1:
1503 ath79_mii1_ctrl_set_if(ag);
1504 break;
1505 default:
1506 break;
1507 }
1508
1509 netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
1510
1511 ag71xx_dump_regs(ag);
1512
1513 ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, 0);
1514
1515 ag71xx_hw_init(ag);
1516
1517 ag71xx_dump_regs(ag);
1518
1519 if(!of_device_is_compatible(np, "simple-mfd")) {
1520 mdio_node = of_get_child_by_name(np, "mdio-bus");
1521 if(!IS_ERR(mdio_node))
1522 of_platform_device_create(mdio_node, NULL, NULL);
1523 }
1524
1525 err = ag71xx_phy_connect(ag);
1526 if (err)
1527 goto err_free;
1528
1529 err = ag71xx_debugfs_init(ag);
1530 if (err)
1531 goto err_phy_disconnect;
1532
1533 platform_set_drvdata(pdev, dev);
1534
1535 err = register_netdev(dev);
1536 if (err) {
1537 dev_err(&pdev->dev, "unable to register net device\n");
1538 platform_set_drvdata(pdev, NULL);
1539 ag71xx_debugfs_exit(ag);
1540 goto err_phy_disconnect;
1541 }
1542
1543 pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d, mode:%s\n",
1544 dev->name, (unsigned long) ag->mac_base, dev->irq,
1545 ag71xx_get_phy_if_mode_name(ag->phy_if_mode));
1546
1547 return 0;
1548
1549 err_phy_disconnect:
1550 ag71xx_phy_disconnect(ag);
1551 err_free:
1552 free_netdev(dev);
1553 return err;
1554 }
1555
1556 static int ag71xx_remove(struct platform_device *pdev)
1557 {
1558 struct net_device *dev = platform_get_drvdata(pdev);
1559 struct ag71xx *ag;
1560
1561 if (!dev)
1562 return 0;
1563
1564 ag = netdev_priv(dev);
1565 ag71xx_debugfs_exit(ag);
1566 ag71xx_phy_disconnect(ag);
1567 unregister_netdev(dev);
1568 free_irq(dev->irq, dev);
1569 iounmap(ag->mac_base);
1570 kfree(dev);
1571 platform_set_drvdata(pdev, NULL);
1572
1573 return 0;
1574 }
1575
1576 static const struct of_device_id ag71xx_match[] = {
1577 { .compatible = "qca,ar7100-eth" },
1578 { .compatible = "qca,ar7240-eth" },
1579 { .compatible = "qca,ar7241-eth" },
1580 { .compatible = "qca,ar7242-eth" },
1581 { .compatible = "qca,ar9130-eth" },
1582 { .compatible = "qca,ar9330-eth" },
1583 { .compatible = "qca,ar9340-eth" },
1584 { .compatible = "qca,qca9530-eth" },
1585 { .compatible = "qca,qca9550-eth" },
1586 { .compatible = "qca,qca9560-eth" },
1587 {}
1588 };
1589
1590 static struct platform_driver ag71xx_driver = {
1591 .probe = ag71xx_probe,
1592 .remove = ag71xx_remove,
1593 .driver = {
1594 .name = AG71XX_DRV_NAME,
1595 .of_match_table = ag71xx_match,
1596 }
1597 };
1598
1599 static int __init ag71xx_module_init(void)
1600 {
1601 int ret;
1602
1603 ret = ag71xx_debugfs_root_init();
1604 if (ret)
1605 goto err_out;
1606
1607 ret = platform_driver_register(&ag71xx_driver);
1608 if (ret)
1609 goto err_debugfs_exit;
1610
1611 return 0;
1612
1613 err_debugfs_exit:
1614 ag71xx_debugfs_root_exit();
1615 err_out:
1616 return ret;
1617 }
1618
1619 static void __exit ag71xx_module_exit(void)
1620 {
1621 platform_driver_unregister(&ag71xx_driver);
1622 ag71xx_debugfs_root_exit();
1623 }
1624
1625 module_init(ag71xx_module_init);
1626 module_exit(ag71xx_module_exit);
1627
1628 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1629 MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
1630 MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
1631 MODULE_LICENSE("GPL v2");
1632 MODULE_ALIAS("platform:" AG71XX_DRV_NAME);
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