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pvrusb2: reduce stack usage pvr2_eeprom_analyze()
[linux/fpc-iii.git] / drivers / net / ethernet / qualcomm / emac / emac.c
blob57b35aeac51a0e33334319f8e5567ede3fd37ba3
1 /* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13 /* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver */
14
15 #include <linux/if_ether.h>
16 #include <linux/if_vlan.h>
17 #include <linux/interrupt.h>
18 #include <linux/io.h>
19 #include <linux/module.h>
20 #include <linux/of.h>
21 #include <linux/of_net.h>
22 #include <linux/of_device.h>
23 #include <linux/phy.h>
24 #include <linux/platform_device.h>
25 #include <linux/acpi.h>
26 #include "emac.h"
27 #include "emac-mac.h"
28 #include "emac-phy.h"
29 #include "emac-sgmii.h"
30
31 #define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
32 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
33
34 #define EMAC_RRD_SIZE 4
35 /* The RRD size if timestamping is enabled: */
36 #define EMAC_TS_RRD_SIZE 6
37 #define EMAC_TPD_SIZE 4
38 #define EMAC_RFD_SIZE 2
39
40 #define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0
41 #define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22
42 #define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0
43 #define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24
44
45 #define RXQ0_NUM_RFD_PREF_DEF 8
46 #define TXQ0_NUM_TPD_PREF_DEF 5
47
48 #define EMAC_PREAMBLE_DEF 7
49
50 #define DMAR_DLY_CNT_DEF 15
51 #define DMAW_DLY_CNT_DEF 4
52
53 #define IMR_NORMAL_MASK (\
54 ISR_ERROR |\
55 ISR_GPHY_LINK |\
56 ISR_TX_PKT |\
57 GPHY_WAKEUP_INT)
58
59 #define IMR_EXTENDED_MASK (\
60 SW_MAN_INT |\
61 ISR_OVER |\
62 ISR_ERROR |\
63 ISR_GPHY_LINK |\
64 ISR_TX_PKT |\
65 GPHY_WAKEUP_INT)
66
67 #define ISR_TX_PKT (\
68 TX_PKT_INT |\
69 TX_PKT_INT1 |\
70 TX_PKT_INT2 |\
71 TX_PKT_INT3)
72
73 #define ISR_GPHY_LINK (\
74 GPHY_LINK_UP_INT |\
75 GPHY_LINK_DOWN_INT)
76
77 #define ISR_OVER (\
78 RFD0_UR_INT |\
79 RFD1_UR_INT |\
80 RFD2_UR_INT |\
81 RFD3_UR_INT |\
82 RFD4_UR_INT |\
83 RXF_OF_INT |\
84 TXF_UR_INT)
85
86 #define ISR_ERROR (\
87 DMAR_TO_INT |\
88 DMAW_TO_INT |\
89 TXQ_TO_INT)
90
91 /* in sync with enum emac_clk_id */
92 static const char * const emac_clk_name[] = {
93 "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk",
94 "rx_clk", "sys_clk"
95 };
96
97 void emac_reg_update32(void __iomem *addr, u32 mask, u32 val)
98 {
99 u32 data = readl(addr);
100
101 writel(((data & ~mask) | val), addr);
102 }
103
104 /* reinitialize */
105 int emac_reinit_locked(struct emac_adapter *adpt)
106 {
107 int ret;
108
109 mutex_lock(&adpt->reset_lock);
110
111 emac_mac_down(adpt);
112 emac_sgmii_reset(adpt);
113 ret = emac_mac_up(adpt);
114
115 mutex_unlock(&adpt->reset_lock);
116
117 return ret;
118 }
119
120 /* NAPI */
121 static int emac_napi_rtx(struct napi_struct *napi, int budget)
122 {
123 struct emac_rx_queue *rx_q =
124 container_of(napi, struct emac_rx_queue, napi);
125 struct emac_adapter *adpt = netdev_priv(rx_q->netdev);
126 struct emac_irq *irq = rx_q->irq;
127 int work_done = 0;
128
129 emac_mac_rx_process(adpt, rx_q, &work_done, budget);
130
131 if (work_done < budget) {
132 napi_complete(napi);
133
134 irq->mask |= rx_q->intr;
135 writel(irq->mask, adpt->base + EMAC_INT_MASK);
136 }
137
138 return work_done;
139 }
140
141 /* Transmit the packet */
142 static int emac_start_xmit(struct sk_buff *skb, struct net_device *netdev)
143 {
144 struct emac_adapter *adpt = netdev_priv(netdev);
145
146 return emac_mac_tx_buf_send(adpt, &adpt->tx_q, skb);
147 }
148
149 irqreturn_t emac_isr(int _irq, void *data)
150 {
151 struct emac_irq *irq = data;
152 struct emac_adapter *adpt =
153 container_of(irq, struct emac_adapter, irq);
154 struct emac_rx_queue *rx_q = &adpt->rx_q;
155 u32 isr, status;
156
157 /* disable the interrupt */
158 writel(0, adpt->base + EMAC_INT_MASK);
159
160 isr = readl_relaxed(adpt->base + EMAC_INT_STATUS);
161
162 status = isr & irq->mask;
163 if (status == 0)
164 goto exit;
165
166 if (status & ISR_ERROR) {
167 netif_warn(adpt, intr, adpt->netdev,
168 "warning: error irq status 0x%lx\n",
169 status & ISR_ERROR);
170 /* reset MAC */
171 schedule_work(&adpt->work_thread);
172 }
173
174 /* Schedule the napi for receive queue with interrupt
175 * status bit set
176 */
177 if (status & rx_q->intr) {
178 if (napi_schedule_prep(&rx_q->napi)) {
179 irq->mask &= ~rx_q->intr;
180 __napi_schedule(&rx_q->napi);
181 }
182 }
183
184 if (status & TX_PKT_INT)
185 emac_mac_tx_process(adpt, &adpt->tx_q);
186
187 if (status & ISR_OVER)
188 net_warn_ratelimited("warning: TX/RX overflow\n");
189
190 /* link event */
191 if (status & ISR_GPHY_LINK)
192 phy_mac_interrupt(adpt->phydev, !!(status & GPHY_LINK_UP_INT));
193
194 exit:
195 /* enable the interrupt */
196 writel(irq->mask, adpt->base + EMAC_INT_MASK);
197
198 return IRQ_HANDLED;
199 }
200
201 /* Configure VLAN tag strip/insert feature */
202 static int emac_set_features(struct net_device *netdev,
203 netdev_features_t features)
204 {
205 netdev_features_t changed = features ^ netdev->features;
206 struct emac_adapter *adpt = netdev_priv(netdev);
207
208 /* We only need to reprogram the hardware if the VLAN tag features
209 * have changed, and if it's already running.
210 */
211 if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX)))
212 return 0;
213
214 if (!netif_running(netdev))
215 return 0;
216
217 /* emac_mac_mode_config() uses netdev->features to configure the EMAC,
218 * so make sure it's set first.
219 */
220 netdev->features = features;
221
222 return emac_reinit_locked(adpt);
223 }
224
225 /* Configure Multicast and Promiscuous modes */
226 static void emac_rx_mode_set(struct net_device *netdev)
227 {
228 struct emac_adapter *adpt = netdev_priv(netdev);
229 struct netdev_hw_addr *ha;
230
231 emac_mac_mode_config(adpt);
232
233 /* update multicast address filtering */
234 emac_mac_multicast_addr_clear(adpt);
235 netdev_for_each_mc_addr(ha, netdev)
236 emac_mac_multicast_addr_set(adpt, ha->addr);
237 }
238
239 /* Change the Maximum Transfer Unit (MTU) */
240 static int emac_change_mtu(struct net_device *netdev, int new_mtu)
241 {
242 unsigned int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
243 struct emac_adapter *adpt = netdev_priv(netdev);
244
245 if ((max_frame < EMAC_MIN_ETH_FRAME_SIZE) ||
246 (max_frame > EMAC_MAX_ETH_FRAME_SIZE)) {
247 netdev_err(adpt->netdev, "error: invalid MTU setting\n");
248 return -EINVAL;
249 }
250
251 netif_info(adpt, hw, adpt->netdev,
252 "changing MTU from %d to %d\n", netdev->mtu,
253 new_mtu);
254 netdev->mtu = new_mtu;
255
256 if (netif_running(netdev))
257 return emac_reinit_locked(adpt);
258
259 return 0;
260 }
261
262 /* Called when the network interface is made active */
263 static int emac_open(struct net_device *netdev)
264 {
265 struct emac_adapter *adpt = netdev_priv(netdev);
266 int ret;
267
268 /* allocate rx/tx dma buffer & descriptors */
269 ret = emac_mac_rx_tx_rings_alloc_all(adpt);
270 if (ret) {
271 netdev_err(adpt->netdev, "error allocating rx/tx rings\n");
272 return ret;
273 }
274
275 ret = emac_mac_up(adpt);
276 if (ret) {
277 emac_mac_rx_tx_rings_free_all(adpt);
278 return ret;
279 }
280
281 emac_mac_start(adpt);
282
283 return 0;
284 }
285
286 /* Called when the network interface is disabled */
287 static int emac_close(struct net_device *netdev)
288 {
289 struct emac_adapter *adpt = netdev_priv(netdev);
290
291 mutex_lock(&adpt->reset_lock);
292
293 emac_mac_down(adpt);
294 emac_mac_rx_tx_rings_free_all(adpt);
295
296 mutex_unlock(&adpt->reset_lock);
297
298 return 0;
299 }
300
301 /* Respond to a TX hang */
302 static void emac_tx_timeout(struct net_device *netdev)
303 {
304 struct emac_adapter *adpt = netdev_priv(netdev);
305
306 schedule_work(&adpt->work_thread);
307 }
308
309 /* IOCTL support for the interface */
310 static int emac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
311 {
312 if (!netif_running(netdev))
313 return -EINVAL;
314
315 if (!netdev->phydev)
316 return -ENODEV;
317
318 return phy_mii_ioctl(netdev->phydev, ifr, cmd);
319 }
320
321 /* Provide network statistics info for the interface */
322 static struct rtnl_link_stats64 *emac_get_stats64(struct net_device *netdev,
323 struct rtnl_link_stats64 *net_stats)
324 {
325 struct emac_adapter *adpt = netdev_priv(netdev);
326 unsigned int addr = REG_MAC_RX_STATUS_BIN;
327 struct emac_stats *stats = &adpt->stats;
328 u64 *stats_itr = &adpt->stats.rx_ok;
329 u32 val;
330
331 spin_lock(&stats->lock);
332
333 while (addr <= REG_MAC_RX_STATUS_END) {
334 val = readl_relaxed(adpt->base + addr);
335 *stats_itr += val;
336 stats_itr++;
337 addr += sizeof(u32);
338 }
339
340 /* additional rx status */
341 val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG23);
342 adpt->stats.rx_crc_align += val;
343 val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG24);
344 adpt->stats.rx_jabbers += val;
345
346 /* update tx status */
347 addr = REG_MAC_TX_STATUS_BIN;
348 stats_itr = &adpt->stats.tx_ok;
349
350 while (addr <= REG_MAC_TX_STATUS_END) {
351 val = readl_relaxed(adpt->base + addr);
352 *stats_itr += val;
353 ++stats_itr;
354 addr += sizeof(u32);
355 }
356
357 /* additional tx status */
358 val = readl_relaxed(adpt->base + EMAC_TXMAC_STATC_REG25);
359 adpt->stats.tx_col += val;
360
361 /* return parsed statistics */
362 net_stats->rx_packets = stats->rx_ok;
363 net_stats->tx_packets = stats->tx_ok;
364 net_stats->rx_bytes = stats->rx_byte_cnt;
365 net_stats->tx_bytes = stats->tx_byte_cnt;
366 net_stats->multicast = stats->rx_mcast;
367 net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 +
368 stats->tx_late_col + stats->tx_abort_col;
369
370 net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err +
371 stats->rx_len_err + stats->rx_sz_ov +
372 stats->rx_align_err;
373 net_stats->rx_fifo_errors = stats->rx_rxf_ov;
374 net_stats->rx_length_errors = stats->rx_len_err;
375 net_stats->rx_crc_errors = stats->rx_fcs_err;
376 net_stats->rx_frame_errors = stats->rx_align_err;
377 net_stats->rx_over_errors = stats->rx_rxf_ov;
378 net_stats->rx_missed_errors = stats->rx_rxf_ov;
379
380 net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col +
381 stats->tx_underrun + stats->tx_trunc;
382 net_stats->tx_fifo_errors = stats->tx_underrun;
383 net_stats->tx_aborted_errors = stats->tx_abort_col;
384 net_stats->tx_window_errors = stats->tx_late_col;
385
386 spin_unlock(&stats->lock);
387
388 return net_stats;
389 }
390
391 static const struct net_device_ops emac_netdev_ops = {
392 .ndo_open = emac_open,
393 .ndo_stop = emac_close,
394 .ndo_validate_addr = eth_validate_addr,
395 .ndo_start_xmit = emac_start_xmit,
396 .ndo_set_mac_address = eth_mac_addr,
397 .ndo_change_mtu = emac_change_mtu,
398 .ndo_do_ioctl = emac_ioctl,
399 .ndo_tx_timeout = emac_tx_timeout,
400 .ndo_get_stats64 = emac_get_stats64,
401 .ndo_set_features = emac_set_features,
402 .ndo_set_rx_mode = emac_rx_mode_set,
403 };
404
405 /* Watchdog task routine, called to reinitialize the EMAC */
406 static void emac_work_thread(struct work_struct *work)
407 {
408 struct emac_adapter *adpt =
409 container_of(work, struct emac_adapter, work_thread);
410
411 emac_reinit_locked(adpt);
412 }
413
414 /* Initialize various data structures */
415 static void emac_init_adapter(struct emac_adapter *adpt)
416 {
417 u32 reg;
418
419 /* descriptors */
420 adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS;
421 adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS;
422
423 /* dma */
424 adpt->dma_order = emac_dma_ord_out;
425 adpt->dmar_block = emac_dma_req_4096;
426 adpt->dmaw_block = emac_dma_req_128;
427 adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF;
428 adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF;
429 adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF;
430 adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF;
431
432 /* irq moderator */
433 reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) |
434 ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT);
435 adpt->irq_mod = reg;
436
437 /* others */
438 adpt->preamble = EMAC_PREAMBLE_DEF;
439 }
440
441 /* Get the clock */
442 static int emac_clks_get(struct platform_device *pdev,
443 struct emac_adapter *adpt)
444 {
445 unsigned int i;
446
447 for (i = 0; i < EMAC_CLK_CNT; i++) {
448 struct clk *clk = devm_clk_get(&pdev->dev, emac_clk_name[i]);
449
450 if (IS_ERR(clk)) {
451 dev_err(&pdev->dev,
452 "could not claim clock %s (error=%li)\n",
453 emac_clk_name[i], PTR_ERR(clk));
454
455 return PTR_ERR(clk);
456 }
457
458 adpt->clk[i] = clk;
459 }
460
461 return 0;
462 }
463
464 /* Initialize clocks */
465 static int emac_clks_phase1_init(struct platform_device *pdev,
466 struct emac_adapter *adpt)
467 {
468 int ret;
469
470 ret = emac_clks_get(pdev, adpt);
471 if (ret)
472 return ret;
473
474 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]);
475 if (ret)
476 return ret;
477
478 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]);
479 if (ret)
480 return ret;
481
482 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000);
483 if (ret)
484 return ret;
485
486 return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
487 }
488
489 /* Enable clocks; needs emac_clks_phase1_init to be called before */
490 static int emac_clks_phase2_init(struct platform_device *pdev,
491 struct emac_adapter *adpt)
492 {
493 int ret;
494
495 ret = clk_set_rate(adpt->clk[EMAC_CLK_TX], 125000000);
496 if (ret)
497 return ret;
498
499 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]);
500 if (ret)
501 return ret;
502
503 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 125000000);
504 if (ret)
505 return ret;
506
507 ret = clk_set_rate(adpt->clk[EMAC_CLK_MDIO], 25000000);
508 if (ret)
509 return ret;
510
511 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]);
512 if (ret)
513 return ret;
514
515 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]);
516 if (ret)
517 return ret;
518
519 return clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]);
520 }
521
522 static void emac_clks_teardown(struct emac_adapter *adpt)
523 {
524
525 unsigned int i;
526
527 for (i = 0; i < EMAC_CLK_CNT; i++)
528 clk_disable_unprepare(adpt->clk[i]);
529 }
530
531 /* Get the resources */
532 static int emac_probe_resources(struct platform_device *pdev,
533 struct emac_adapter *adpt)
534 {
535 struct net_device *netdev = adpt->netdev;
536 struct resource *res;
537 char maddr[ETH_ALEN];
538 int ret = 0;
539
540 /* get mac address */
541 if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN))
542 ether_addr_copy(netdev->dev_addr, maddr);
543 else
544 eth_hw_addr_random(netdev);
545
546 /* Core 0 interrupt */
547 ret = platform_get_irq(pdev, 0);
548 if (ret < 0) {
549 dev_err(&pdev->dev,
550 "error: missing core0 irq resource (error=%i)\n", ret);
551 return ret;
552 }
553 adpt->irq.irq = ret;
554
555 /* base register address */
556 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
557 adpt->base = devm_ioremap_resource(&pdev->dev, res);
558 if (IS_ERR(adpt->base))
559 return PTR_ERR(adpt->base);
560
561 /* CSR register address */
562 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
563 adpt->csr = devm_ioremap_resource(&pdev->dev, res);
564 if (IS_ERR(adpt->csr))
565 return PTR_ERR(adpt->csr);
566
567 netdev->base_addr = (unsigned long)adpt->base;
568
569 return 0;
570 }
571
572 static const struct of_device_id emac_dt_match[] = {
573 {
574 .compatible = "qcom,fsm9900-emac",
575 },
576 {}
577 };
578 MODULE_DEVICE_TABLE(of, emac_dt_match);
579
580 #if IS_ENABLED(CONFIG_ACPI)
581 static const struct acpi_device_id emac_acpi_match[] = {
582 {
583 .id = "QCOM8070",
584 },
585 {}
586 };
587 MODULE_DEVICE_TABLE(acpi, emac_acpi_match);
588 #endif
589
590 static int emac_probe(struct platform_device *pdev)
591 {
592 struct net_device *netdev;
593 struct emac_adapter *adpt;
594 struct emac_phy *phy;
595 u16 devid, revid;
596 u32 reg;
597 int ret;
598
599 /* The EMAC itself is capable of 64-bit DMA, so try that first. */
600 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
601 if (ret) {
602 /* Some platforms may restrict the EMAC's address bus to less
603 * then the size of DDR. In this case, we need to try a
604 * smaller mask. We could try every possible smaller mask,
605 * but that's overkill. Instead, just fall to 32-bit, which
606 * should always work.
607 */
608 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
609 if (ret) {
610 dev_err(&pdev->dev, "could not set DMA mask\n");
611 return ret;
612 }
613 }
614
615 netdev = alloc_etherdev(sizeof(struct emac_adapter));
616 if (!netdev)
617 return -ENOMEM;
618
619 dev_set_drvdata(&pdev->dev, netdev);
620 SET_NETDEV_DEV(netdev, &pdev->dev);
621
622 adpt = netdev_priv(netdev);
623 adpt->netdev = netdev;
624 adpt->msg_enable = EMAC_MSG_DEFAULT;
625
626 phy = &adpt->phy;
627
628 mutex_init(&adpt->reset_lock);
629 spin_lock_init(&adpt->stats.lock);
630
631 adpt->irq.mask = RX_PKT_INT0 | IMR_NORMAL_MASK;
632
633 ret = emac_probe_resources(pdev, adpt);
634 if (ret)
635 goto err_undo_netdev;
636
637 /* initialize clocks */
638 ret = emac_clks_phase1_init(pdev, adpt);
639 if (ret) {
640 dev_err(&pdev->dev, "could not initialize clocks\n");
641 goto err_undo_netdev;
642 }
643
644 netdev->watchdog_timeo = EMAC_WATCHDOG_TIME;
645 netdev->irq = adpt->irq.irq;
646
647 adpt->rrd_size = EMAC_RRD_SIZE;
648 adpt->tpd_size = EMAC_TPD_SIZE;
649 adpt->rfd_size = EMAC_RFD_SIZE;
650
651 netdev->netdev_ops = &emac_netdev_ops;
652
653 emac_init_adapter(adpt);
654
655 /* init external phy */
656 ret = emac_phy_config(pdev, adpt);
657 if (ret)
658 goto err_undo_clocks;
659
660 /* init internal sgmii phy */
661 ret = emac_sgmii_config(pdev, adpt);
662 if (ret)
663 goto err_undo_mdiobus;
664
665 /* enable clocks */
666 ret = emac_clks_phase2_init(pdev, adpt);
667 if (ret) {
668 dev_err(&pdev->dev, "could not initialize clocks\n");
669 goto err_undo_mdiobus;
670 }
671
672 emac_mac_reset(adpt);
673
674 /* set hw features */
675 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
676 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX |
677 NETIF_F_HW_VLAN_CTAG_TX;
678 netdev->hw_features = netdev->features;
679
680 netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM |
681 NETIF_F_TSO | NETIF_F_TSO6;
682
683 INIT_WORK(&adpt->work_thread, emac_work_thread);
684
685 /* Initialize queues */
686 emac_mac_rx_tx_ring_init_all(pdev, adpt);
687
688 netif_napi_add(netdev, &adpt->rx_q.napi, emac_napi_rtx,
689 NAPI_POLL_WEIGHT);
690
691 ret = register_netdev(netdev);
692 if (ret) {
693 dev_err(&pdev->dev, "could not register net device\n");
694 goto err_undo_napi;
695 }
696
697 reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL);
698 devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT;
699 revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT;
700 reg = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION);
701
702 netif_info(adpt, probe, netdev,
703 "hardware id %d.%d, hardware version %d.%d.%d\n",
704 devid, revid,
705 (reg & MAJOR_BMSK) >> MAJOR_SHFT,
706 (reg & MINOR_BMSK) >> MINOR_SHFT,
707 (reg & STEP_BMSK) >> STEP_SHFT);
708
709 return 0;
710
711 err_undo_napi:
712 netif_napi_del(&adpt->rx_q.napi);
713 err_undo_mdiobus:
714 if (!has_acpi_companion(&pdev->dev))
715 put_device(&adpt->phydev->mdio.dev);
716 mdiobus_unregister(adpt->mii_bus);
717 err_undo_clocks:
718 emac_clks_teardown(adpt);
719 err_undo_netdev:
720 free_netdev(netdev);
721
722 return ret;
723 }
724
725 static int emac_remove(struct platform_device *pdev)
726 {
727 struct net_device *netdev = dev_get_drvdata(&pdev->dev);
728 struct emac_adapter *adpt = netdev_priv(netdev);
729
730 unregister_netdev(netdev);
731 netif_napi_del(&adpt->rx_q.napi);
732
733 emac_clks_teardown(adpt);
734
735 if (!has_acpi_companion(&pdev->dev))
736 put_device(&adpt->phydev->mdio.dev);
737 mdiobus_unregister(adpt->mii_bus);
738 free_netdev(netdev);
739
740 if (adpt->phy.digital)
741 iounmap(adpt->phy.digital);
742 iounmap(adpt->phy.base);
743
744 return 0;
745 }
746
747 static struct platform_driver emac_platform_driver = {
748 .probe = emac_probe,
749 .remove = emac_remove,
750 .driver = {
751 .name = "qcom-emac",
752 .of_match_table = emac_dt_match,
753 .acpi_match_table = ACPI_PTR(emac_acpi_match),
754 },
755 };
756
757 module_platform_driver(emac_platform_driver);
758
759 MODULE_LICENSE("GPL v2");
760 MODULE_ALIAS("platform:qcom-emac");
Linux with added FPC-III support