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fe1a5642 HM |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Lantiq / Intel PMAC driver for XRX200 SoCs | |
4 | * | |
5 | * Copyright (C) 2010 Lantiq Deutschland | |
6 | * Copyright (C) 2012 John Crispin <john@phrozen.org> | |
7 | * Copyright (C) 2017 - 2018 Hauke Mehrtens <hauke@hauke-m.de> | |
8 | */ | |
9 | ||
10 | #include <linux/etherdevice.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/clk.h> | |
15 | #include <linux/delay.h> | |
16 | ||
17 | #include <linux/of_net.h> | |
18 | #include <linux/of_platform.h> | |
19 | ||
20 | #include <xway_dma.h> | |
21 | ||
22 | /* DMA */ | |
23 | #define XRX200_DMA_DATA_LEN 0x600 | |
24 | #define XRX200_DMA_RX 0 | |
25 | #define XRX200_DMA_TX 1 | |
26 | ||
27 | /* cpu port mac */ | |
28 | #define PMAC_RX_IPG 0x0024 | |
29 | #define PMAC_RX_IPG_MASK 0xf | |
30 | ||
31 | #define PMAC_HD_CTL 0x0000 | |
32 | /* Add Ethernet header to packets from DMA to PMAC */ | |
33 | #define PMAC_HD_CTL_ADD BIT(0) | |
34 | /* Add VLAN tag to Packets from DMA to PMAC */ | |
35 | #define PMAC_HD_CTL_TAG BIT(1) | |
36 | /* Add CRC to packets from DMA to PMAC */ | |
37 | #define PMAC_HD_CTL_AC BIT(2) | |
38 | /* Add status header to packets from PMAC to DMA */ | |
39 | #define PMAC_HD_CTL_AS BIT(3) | |
40 | /* Remove CRC from packets from PMAC to DMA */ | |
41 | #define PMAC_HD_CTL_RC BIT(4) | |
42 | /* Remove Layer-2 header from packets from PMAC to DMA */ | |
43 | #define PMAC_HD_CTL_RL2 BIT(5) | |
44 | /* Status header is present from DMA to PMAC */ | |
45 | #define PMAC_HD_CTL_RXSH BIT(6) | |
46 | /* Add special tag from PMAC to switch */ | |
47 | #define PMAC_HD_CTL_AST BIT(7) | |
48 | /* Remove specail Tag from PMAC to DMA */ | |
49 | #define PMAC_HD_CTL_RST BIT(8) | |
50 | /* Check CRC from DMA to PMAC */ | |
51 | #define PMAC_HD_CTL_CCRC BIT(9) | |
52 | /* Enable reaction to Pause frames in the PMAC */ | |
53 | #define PMAC_HD_CTL_FC BIT(10) | |
54 | ||
55 | struct xrx200_chan { | |
56 | int tx_free; | |
57 | ||
58 | struct napi_struct napi; | |
59 | struct ltq_dma_channel dma; | |
60 | struct sk_buff *skb[LTQ_DESC_NUM]; | |
61 | ||
62 | struct xrx200_priv *priv; | |
63 | }; | |
64 | ||
65 | struct xrx200_priv { | |
66 | struct clk *clk; | |
67 | ||
68 | struct xrx200_chan chan_tx; | |
69 | struct xrx200_chan chan_rx; | |
70 | ||
71 | struct net_device *net_dev; | |
72 | struct device *dev; | |
73 | ||
74 | __iomem void *pmac_reg; | |
75 | }; | |
76 | ||
77 | static u32 xrx200_pmac_r32(struct xrx200_priv *priv, u32 offset) | |
78 | { | |
79 | return __raw_readl(priv->pmac_reg + offset); | |
80 | } | |
81 | ||
82 | static void xrx200_pmac_w32(struct xrx200_priv *priv, u32 val, u32 offset) | |
83 | { | |
84 | __raw_writel(val, priv->pmac_reg + offset); | |
85 | } | |
86 | ||
87 | static void xrx200_pmac_mask(struct xrx200_priv *priv, u32 clear, u32 set, | |
88 | u32 offset) | |
89 | { | |
90 | u32 val = xrx200_pmac_r32(priv, offset); | |
91 | ||
92 | val &= ~(clear); | |
93 | val |= set; | |
94 | xrx200_pmac_w32(priv, val, offset); | |
95 | } | |
96 | ||
97 | /* drop all the packets from the DMA ring */ | |
98 | static void xrx200_flush_dma(struct xrx200_chan *ch) | |
99 | { | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < LTQ_DESC_NUM; i++) { | |
103 | struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; | |
104 | ||
105 | if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) != LTQ_DMA_C) | |
106 | break; | |
107 | ||
108 | desc->ctl = LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | | |
109 | XRX200_DMA_DATA_LEN; | |
110 | ch->dma.desc++; | |
111 | ch->dma.desc %= LTQ_DESC_NUM; | |
112 | } | |
113 | } | |
114 | ||
115 | static int xrx200_open(struct net_device *net_dev) | |
116 | { | |
117 | struct xrx200_priv *priv = netdev_priv(net_dev); | |
fe1a5642 HM |
118 | |
119 | napi_enable(&priv->chan_tx.napi); | |
120 | ltq_dma_open(&priv->chan_tx.dma); | |
121 | ltq_dma_enable_irq(&priv->chan_tx.dma); | |
122 | ||
123 | napi_enable(&priv->chan_rx.napi); | |
124 | ltq_dma_open(&priv->chan_rx.dma); | |
125 | /* The boot loader does not always deactivate the receiving of frames | |
126 | * on the ports and then some packets queue up in the PPE buffers. | |
127 | * They already passed the PMAC so they do not have the tags | |
128 | * configured here. Read the these packets here and drop them. | |
129 | * The HW should have written them into memory after 10us | |
130 | */ | |
131 | usleep_range(20, 40); | |
132 | xrx200_flush_dma(&priv->chan_rx); | |
133 | ltq_dma_enable_irq(&priv->chan_rx.dma); | |
134 | ||
135 | netif_wake_queue(net_dev); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int xrx200_close(struct net_device *net_dev) | |
141 | { | |
142 | struct xrx200_priv *priv = netdev_priv(net_dev); | |
143 | ||
144 | netif_stop_queue(net_dev); | |
145 | ||
146 | napi_disable(&priv->chan_rx.napi); | |
147 | ltq_dma_close(&priv->chan_rx.dma); | |
148 | ||
149 | napi_disable(&priv->chan_tx.napi); | |
150 | ltq_dma_close(&priv->chan_tx.dma); | |
151 | ||
fe1a5642 HM |
152 | return 0; |
153 | } | |
154 | ||
155 | static int xrx200_alloc_skb(struct xrx200_chan *ch) | |
156 | { | |
157 | int ret = 0; | |
158 | ||
159 | ch->skb[ch->dma.desc] = netdev_alloc_skb_ip_align(ch->priv->net_dev, | |
160 | XRX200_DMA_DATA_LEN); | |
161 | if (!ch->skb[ch->dma.desc]) { | |
162 | ret = -ENOMEM; | |
163 | goto skip; | |
164 | } | |
165 | ||
166 | ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(ch->priv->dev, | |
167 | ch->skb[ch->dma.desc]->data, XRX200_DMA_DATA_LEN, | |
168 | DMA_FROM_DEVICE); | |
169 | if (unlikely(dma_mapping_error(ch->priv->dev, | |
170 | ch->dma.desc_base[ch->dma.desc].addr))) { | |
171 | dev_kfree_skb_any(ch->skb[ch->dma.desc]); | |
172 | ret = -ENOMEM; | |
173 | goto skip; | |
174 | } | |
175 | ||
176 | skip: | |
177 | ch->dma.desc_base[ch->dma.desc].ctl = | |
178 | LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | | |
179 | XRX200_DMA_DATA_LEN; | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | static int xrx200_hw_receive(struct xrx200_chan *ch) | |
185 | { | |
186 | struct xrx200_priv *priv = ch->priv; | |
187 | struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; | |
188 | struct sk_buff *skb = ch->skb[ch->dma.desc]; | |
189 | int len = (desc->ctl & LTQ_DMA_SIZE_MASK); | |
190 | struct net_device *net_dev = priv->net_dev; | |
191 | int ret; | |
192 | ||
193 | ret = xrx200_alloc_skb(ch); | |
194 | ||
195 | ch->dma.desc++; | |
196 | ch->dma.desc %= LTQ_DESC_NUM; | |
197 | ||
198 | if (ret) { | |
199 | netdev_err(net_dev, "failed to allocate new rx buffer\n"); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | skb_put(skb, len); | |
204 | skb->protocol = eth_type_trans(skb, net_dev); | |
205 | netif_receive_skb(skb); | |
206 | net_dev->stats.rx_packets++; | |
207 | net_dev->stats.rx_bytes += len - ETH_FCS_LEN; | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static int xrx200_poll_rx(struct napi_struct *napi, int budget) | |
213 | { | |
214 | struct xrx200_chan *ch = container_of(napi, | |
215 | struct xrx200_chan, napi); | |
216 | int rx = 0; | |
217 | int ret; | |
218 | ||
219 | while (rx < budget) { | |
220 | struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; | |
221 | ||
222 | if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { | |
223 | ret = xrx200_hw_receive(ch); | |
224 | if (ret) | |
225 | return ret; | |
226 | rx++; | |
227 | } else { | |
228 | break; | |
229 | } | |
230 | } | |
231 | ||
232 | if (rx < budget) { | |
c582a7fe HM |
233 | if (napi_complete_done(&ch->napi, rx)) |
234 | ltq_dma_enable_irq(&ch->dma); | |
fe1a5642 HM |
235 | } |
236 | ||
237 | return rx; | |
238 | } | |
239 | ||
240 | static int xrx200_tx_housekeeping(struct napi_struct *napi, int budget) | |
241 | { | |
242 | struct xrx200_chan *ch = container_of(napi, | |
243 | struct xrx200_chan, napi); | |
244 | struct net_device *net_dev = ch->priv->net_dev; | |
245 | int pkts = 0; | |
246 | int bytes = 0; | |
247 | ||
f9317ae5 | 248 | netif_tx_lock(net_dev); |
fe1a5642 HM |
249 | while (pkts < budget) { |
250 | struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->tx_free]; | |
251 | ||
252 | if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { | |
253 | struct sk_buff *skb = ch->skb[ch->tx_free]; | |
254 | ||
255 | pkts++; | |
256 | bytes += skb->len; | |
257 | ch->skb[ch->tx_free] = NULL; | |
258 | consume_skb(skb); | |
259 | memset(&ch->dma.desc_base[ch->tx_free], 0, | |
260 | sizeof(struct ltq_dma_desc)); | |
261 | ch->tx_free++; | |
262 | ch->tx_free %= LTQ_DESC_NUM; | |
263 | } else { | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | net_dev->stats.tx_packets += pkts; | |
269 | net_dev->stats.tx_bytes += bytes; | |
270 | netdev_completed_queue(ch->priv->net_dev, pkts, bytes); | |
271 | ||
f9317ae5 | 272 | netif_tx_unlock(net_dev); |
dea36631 HM |
273 | if (netif_queue_stopped(net_dev)) |
274 | netif_wake_queue(net_dev); | |
275 | ||
fe1a5642 | 276 | if (pkts < budget) { |
c582a7fe HM |
277 | if (napi_complete_done(&ch->napi, pkts)) |
278 | ltq_dma_enable_irq(&ch->dma); | |
fe1a5642 HM |
279 | } |
280 | ||
281 | return pkts; | |
282 | } | |
283 | ||
1cfecc23 YW |
284 | static netdev_tx_t xrx200_start_xmit(struct sk_buff *skb, |
285 | struct net_device *net_dev) | |
fe1a5642 HM |
286 | { |
287 | struct xrx200_priv *priv = netdev_priv(net_dev); | |
288 | struct xrx200_chan *ch = &priv->chan_tx; | |
289 | struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; | |
290 | u32 byte_offset; | |
291 | dma_addr_t mapping; | |
292 | int len; | |
293 | ||
294 | skb->dev = net_dev; | |
295 | if (skb_put_padto(skb, ETH_ZLEN)) { | |
296 | net_dev->stats.tx_dropped++; | |
297 | return NETDEV_TX_OK; | |
298 | } | |
299 | ||
300 | len = skb->len; | |
301 | ||
302 | if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) { | |
303 | netdev_err(net_dev, "tx ring full\n"); | |
304 | netif_stop_queue(net_dev); | |
305 | return NETDEV_TX_BUSY; | |
306 | } | |
307 | ||
308 | ch->skb[ch->dma.desc] = skb; | |
309 | ||
310 | mapping = dma_map_single(priv->dev, skb->data, len, DMA_TO_DEVICE); | |
311 | if (unlikely(dma_mapping_error(priv->dev, mapping))) | |
312 | goto err_drop; | |
313 | ||
314 | /* dma needs to start on a 16 byte aligned address */ | |
315 | byte_offset = mapping % 16; | |
316 | ||
317 | desc->addr = mapping - byte_offset; | |
318 | /* Make sure the address is written before we give it to HW */ | |
319 | wmb(); | |
320 | desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP | | |
321 | LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK); | |
322 | ch->dma.desc++; | |
323 | ch->dma.desc %= LTQ_DESC_NUM; | |
324 | if (ch->dma.desc == ch->tx_free) | |
325 | netif_stop_queue(net_dev); | |
326 | ||
327 | netdev_sent_queue(net_dev, len); | |
328 | ||
329 | return NETDEV_TX_OK; | |
330 | ||
331 | err_drop: | |
332 | dev_kfree_skb(skb); | |
333 | net_dev->stats.tx_dropped++; | |
334 | net_dev->stats.tx_errors++; | |
335 | return NETDEV_TX_OK; | |
336 | } | |
337 | ||
338 | static const struct net_device_ops xrx200_netdev_ops = { | |
339 | .ndo_open = xrx200_open, | |
340 | .ndo_stop = xrx200_close, | |
341 | .ndo_start_xmit = xrx200_start_xmit, | |
342 | .ndo_set_mac_address = eth_mac_addr, | |
343 | .ndo_validate_addr = eth_validate_addr, | |
fe1a5642 HM |
344 | }; |
345 | ||
346 | static irqreturn_t xrx200_dma_irq(int irq, void *ptr) | |
347 | { | |
348 | struct xrx200_chan *ch = ptr; | |
349 | ||
9423361d HM |
350 | if (napi_schedule_prep(&ch->napi)) { |
351 | __napi_schedule(&ch->napi); | |
352 | ltq_dma_disable_irq(&ch->dma); | |
353 | } | |
fe1a5642 | 354 | |
9423361d | 355 | ltq_dma_ack_irq(&ch->dma); |
fe1a5642 HM |
356 | |
357 | return IRQ_HANDLED; | |
358 | } | |
359 | ||
360 | static int xrx200_dma_init(struct xrx200_priv *priv) | |
361 | { | |
362 | struct xrx200_chan *ch_rx = &priv->chan_rx; | |
363 | struct xrx200_chan *ch_tx = &priv->chan_tx; | |
364 | int ret = 0; | |
365 | int i; | |
366 | ||
367 | ltq_dma_init_port(DMA_PORT_ETOP); | |
368 | ||
369 | ch_rx->dma.nr = XRX200_DMA_RX; | |
370 | ch_rx->dma.dev = priv->dev; | |
371 | ch_rx->priv = priv; | |
372 | ||
373 | ltq_dma_alloc_rx(&ch_rx->dma); | |
374 | for (ch_rx->dma.desc = 0; ch_rx->dma.desc < LTQ_DESC_NUM; | |
375 | ch_rx->dma.desc++) { | |
376 | ret = xrx200_alloc_skb(ch_rx); | |
377 | if (ret) | |
378 | goto rx_free; | |
379 | } | |
380 | ch_rx->dma.desc = 0; | |
381 | ret = devm_request_irq(priv->dev, ch_rx->dma.irq, xrx200_dma_irq, 0, | |
382 | "xrx200_net_rx", &priv->chan_rx); | |
383 | if (ret) { | |
384 | dev_err(priv->dev, "failed to request RX irq %d\n", | |
385 | ch_rx->dma.irq); | |
386 | goto rx_ring_free; | |
387 | } | |
388 | ||
389 | ch_tx->dma.nr = XRX200_DMA_TX; | |
390 | ch_tx->dma.dev = priv->dev; | |
391 | ch_tx->priv = priv; | |
392 | ||
393 | ltq_dma_alloc_tx(&ch_tx->dma); | |
394 | ret = devm_request_irq(priv->dev, ch_tx->dma.irq, xrx200_dma_irq, 0, | |
395 | "xrx200_net_tx", &priv->chan_tx); | |
396 | if (ret) { | |
397 | dev_err(priv->dev, "failed to request TX irq %d\n", | |
398 | ch_tx->dma.irq); | |
399 | goto tx_free; | |
400 | } | |
401 | ||
402 | return ret; | |
403 | ||
404 | tx_free: | |
405 | ltq_dma_free(&ch_tx->dma); | |
406 | ||
407 | rx_ring_free: | |
408 | /* free the allocated RX ring */ | |
409 | for (i = 0; i < LTQ_DESC_NUM; i++) { | |
410 | if (priv->chan_rx.skb[i]) | |
411 | dev_kfree_skb_any(priv->chan_rx.skb[i]); | |
412 | } | |
413 | ||
414 | rx_free: | |
415 | ltq_dma_free(&ch_rx->dma); | |
416 | return ret; | |
417 | } | |
418 | ||
419 | static void xrx200_hw_cleanup(struct xrx200_priv *priv) | |
420 | { | |
421 | int i; | |
422 | ||
423 | ltq_dma_free(&priv->chan_tx.dma); | |
424 | ltq_dma_free(&priv->chan_rx.dma); | |
425 | ||
426 | /* free the allocated RX ring */ | |
427 | for (i = 0; i < LTQ_DESC_NUM; i++) | |
428 | dev_kfree_skb_any(priv->chan_rx.skb[i]); | |
429 | } | |
430 | ||
431 | static int xrx200_probe(struct platform_device *pdev) | |
432 | { | |
433 | struct device *dev = &pdev->dev; | |
434 | struct device_node *np = dev->of_node; | |
435 | struct resource *res; | |
436 | struct xrx200_priv *priv; | |
437 | struct net_device *net_dev; | |
438 | const u8 *mac; | |
439 | int err; | |
440 | ||
441 | /* alloc the network device */ | |
442 | net_dev = devm_alloc_etherdev(dev, sizeof(struct xrx200_priv)); | |
443 | if (!net_dev) | |
444 | return -ENOMEM; | |
445 | ||
446 | priv = netdev_priv(net_dev); | |
447 | priv->net_dev = net_dev; | |
448 | priv->dev = dev; | |
449 | ||
450 | net_dev->netdev_ops = &xrx200_netdev_ops; | |
451 | SET_NETDEV_DEV(net_dev, dev); | |
452 | net_dev->min_mtu = ETH_ZLEN; | |
453 | net_dev->max_mtu = XRX200_DMA_DATA_LEN; | |
454 | ||
455 | /* load the memory ranges */ | |
456 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
457 | if (!res) { | |
458 | dev_err(dev, "failed to get resources\n"); | |
459 | return -ENOENT; | |
460 | } | |
461 | ||
462 | priv->pmac_reg = devm_ioremap_resource(dev, res); | |
b8b2de91 | 463 | if (IS_ERR(priv->pmac_reg)) { |
fe1a5642 | 464 | dev_err(dev, "failed to request and remap io ranges\n"); |
b8b2de91 | 465 | return PTR_ERR(priv->pmac_reg); |
fe1a5642 HM |
466 | } |
467 | ||
468 | priv->chan_rx.dma.irq = platform_get_irq_byname(pdev, "rx"); | |
d1a55841 | 469 | if (priv->chan_rx.dma.irq < 0) |
fe1a5642 | 470 | return -ENOENT; |
fe1a5642 | 471 | priv->chan_tx.dma.irq = platform_get_irq_byname(pdev, "tx"); |
d1a55841 | 472 | if (priv->chan_tx.dma.irq < 0) |
fe1a5642 | 473 | return -ENOENT; |
fe1a5642 HM |
474 | |
475 | /* get the clock */ | |
476 | priv->clk = devm_clk_get(dev, NULL); | |
477 | if (IS_ERR(priv->clk)) { | |
478 | dev_err(dev, "failed to get clock\n"); | |
479 | return PTR_ERR(priv->clk); | |
480 | } | |
481 | ||
482 | mac = of_get_mac_address(np); | |
a51645f7 | 483 | if (!IS_ERR(mac)) |
fe1a5642 HM |
484 | ether_addr_copy(net_dev->dev_addr, mac); |
485 | else | |
486 | eth_hw_addr_random(net_dev); | |
487 | ||
488 | /* bring up the dma engine and IP core */ | |
489 | err = xrx200_dma_init(priv); | |
490 | if (err) | |
491 | return err; | |
492 | ||
a44ecfbd HM |
493 | /* enable clock gate */ |
494 | err = clk_prepare_enable(priv->clk); | |
495 | if (err) | |
496 | goto err_uninit_dma; | |
497 | ||
fe1a5642 HM |
498 | /* set IPG to 12 */ |
499 | xrx200_pmac_mask(priv, PMAC_RX_IPG_MASK, 0xb, PMAC_RX_IPG); | |
500 | ||
501 | /* enable status header, enable CRC */ | |
502 | xrx200_pmac_mask(priv, 0, | |
503 | PMAC_HD_CTL_RST | PMAC_HD_CTL_AST | PMAC_HD_CTL_RXSH | | |
504 | PMAC_HD_CTL_AS | PMAC_HD_CTL_AC | PMAC_HD_CTL_RC, | |
505 | PMAC_HD_CTL); | |
506 | ||
507 | /* setup NAPI */ | |
508 | netif_napi_add(net_dev, &priv->chan_rx.napi, xrx200_poll_rx, 32); | |
74c7b80e | 509 | netif_tx_napi_add(net_dev, &priv->chan_tx.napi, xrx200_tx_housekeeping, 32); |
fe1a5642 HM |
510 | |
511 | platform_set_drvdata(pdev, priv); | |
512 | ||
513 | err = register_netdev(net_dev); | |
514 | if (err) | |
a44ecfbd | 515 | goto err_unprepare_clk; |
06bc4d00 CJ |
516 | |
517 | return 0; | |
fe1a5642 | 518 | |
a44ecfbd HM |
519 | err_unprepare_clk: |
520 | clk_disable_unprepare(priv->clk); | |
521 | ||
fe1a5642 HM |
522 | err_uninit_dma: |
523 | xrx200_hw_cleanup(priv); | |
524 | ||
06bc4d00 | 525 | return err; |
fe1a5642 HM |
526 | } |
527 | ||
528 | static int xrx200_remove(struct platform_device *pdev) | |
529 | { | |
530 | struct xrx200_priv *priv = platform_get_drvdata(pdev); | |
531 | struct net_device *net_dev = priv->net_dev; | |
532 | ||
533 | /* free stack related instances */ | |
534 | netif_stop_queue(net_dev); | |
535 | netif_napi_del(&priv->chan_tx.napi); | |
536 | netif_napi_del(&priv->chan_rx.napi); | |
537 | ||
538 | /* remove the actual device */ | |
539 | unregister_netdev(net_dev); | |
540 | ||
a44ecfbd HM |
541 | /* release the clock */ |
542 | clk_disable_unprepare(priv->clk); | |
543 | ||
fe1a5642 HM |
544 | /* shut down hardware */ |
545 | xrx200_hw_cleanup(priv); | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static const struct of_device_id xrx200_match[] = { | |
551 | { .compatible = "lantiq,xrx200-net" }, | |
552 | {}, | |
553 | }; | |
554 | MODULE_DEVICE_TABLE(of, xrx200_match); | |
555 | ||
556 | static struct platform_driver xrx200_driver = { | |
557 | .probe = xrx200_probe, | |
558 | .remove = xrx200_remove, | |
559 | .driver = { | |
560 | .name = "lantiq,xrx200-net", | |
561 | .of_match_table = xrx200_match, | |
562 | }, | |
563 | }; | |
564 | ||
565 | module_platform_driver(xrx200_driver); | |
566 | ||
567 | MODULE_AUTHOR("John Crispin <john@phrozen.org>"); | |
568 | MODULE_DESCRIPTION("Lantiq SoC XRX200 ethernet"); | |
569 | MODULE_LICENSE("GPL"); |