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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / ethernet / ti / icssg / icssg_prueth_sr1.c
blob5024f0647a0d3053a8cf1f5dee437d6dfe919884
1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Texas Instruments ICSSG SR1.0 Ethernet Driver
4 *
5 * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
6 * Copyright (c) Siemens AG, 2024
7 *
8 */
9
10 #include <linux/etherdevice.h>
11 #include <linux/genalloc.h>
12 #include <linux/kernel.h>
13 #include <linux/mfd/syscon.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/of_mdio.h>
17 #include <linux/of_net.h>
18 #include <linux/platform_device.h>
19 #include <linux/property.h>
20 #include <linux/phy.h>
21 #include <linux/remoteproc/pruss.h>
22 #include <linux/pruss_driver.h>
23
24 #include "icssg_prueth.h"
25 #include "icssg_mii_rt.h"
26 #include "../k3-cppi-desc-pool.h"
27
28 #define PRUETH_MODULE_DESCRIPTION "PRUSS ICSSG SR1.0 Ethernet driver"
29
30 /* SR1: Set buffer sizes for the pools. There are 8 internal queues
31 * implemented in firmware, but only 4 tx channels/threads in the Egress
32 * direction to firmware. Need a high priority queue for management
33 * messages since they shouldn't be blocked even during high traffic
34 * situation. So use Q0-Q2 as data queues and Q3 as management queue
35 * in the max case. However for ease of configuration, use the max
36 * data queue + 1 for management message if we are not using max
37 * case.
38 *
39 * Allocate 4 MTU buffers per data queue. Firmware requires
40 * pool sizes to be set for internal queues. Set the upper 5 queue
41 * pool size to min size of 128 bytes since there are only 3 tx
42 * data channels and management queue requires only minimum buffer.
43 * i.e lower queues are used by driver and highest priority queue
44 * from that is used for management message.
45 */
46
47 static int emac_egress_buf_pool_size[] = {
48 PRUETH_EMAC_BUF_POOL_SIZE_SR1, PRUETH_EMAC_BUF_POOL_SIZE_SR1,
49 PRUETH_EMAC_BUF_POOL_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1,
50 PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1,
51 PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1, PRUETH_EMAC_BUF_POOL_MIN_SIZE_SR1
52 };
53
54 static void icssg_config_sr1(struct prueth *prueth, struct prueth_emac *emac,
55 int slice)
56 {
57 struct icssg_sr1_config config;
58 void __iomem *va;
59 int i, index;
60
61 memset(&config, 0, sizeof(config));
62 config.addr_lo = cpu_to_le32(lower_32_bits(prueth->msmcram.pa));
63 config.addr_hi = cpu_to_le32(upper_32_bits(prueth->msmcram.pa));
64 config.rx_flow_id = cpu_to_le32(emac->rx_flow_id_base); /* flow id for host port */
65 config.rx_mgr_flow_id = cpu_to_le32(emac->rx_mgm_flow_id_base); /* for mgm ch */
66 config.rand_seed = cpu_to_le32(get_random_u32());
67
68 for (i = PRUETH_EMAC_BUF_POOL_START_SR1; i < PRUETH_NUM_BUF_POOLS_SR1; i++) {
69 index = i - PRUETH_EMAC_BUF_POOL_START_SR1;
70 config.tx_buf_sz[i] = cpu_to_le32(emac_egress_buf_pool_size[index]);
71 }
72
73 va = prueth->shram.va + slice * ICSSG_CONFIG_OFFSET_SLICE1;
74 memcpy_toio(va, &config, sizeof(config));
75
76 emac->speed = SPEED_1000;
77 emac->duplex = DUPLEX_FULL;
78 }
79
80 static int emac_send_command_sr1(struct prueth_emac *emac, u32 cmd)
81 {
82 struct cppi5_host_desc_t *first_desc;
83 u32 pkt_len = sizeof(emac->cmd_data);
84 __le32 *data = emac->cmd_data;
85 dma_addr_t desc_dma, buf_dma;
86 struct prueth_tx_chn *tx_chn;
87 void **swdata;
88 int ret = 0;
89 u32 *epib;
90
91 netdev_dbg(emac->ndev, "Sending cmd %x\n", cmd);
92
93 /* only one command at a time allowed to firmware */
94 mutex_lock(&emac->cmd_lock);
95 data[0] = cpu_to_le32(cmd);
96
97 /* highest priority channel for management messages */
98 tx_chn = &emac->tx_chns[emac->tx_ch_num - 1];
99
100 /* Map the linear buffer */
101 buf_dma = dma_map_single(tx_chn->dma_dev, data, pkt_len, DMA_TO_DEVICE);
102 if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
103 netdev_err(emac->ndev, "cmd %x: failed to map cmd buffer\n", cmd);
104 ret = -EINVAL;
105 goto err_unlock;
106 }
107
108 first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
109 if (!first_desc) {
110 netdev_err(emac->ndev, "cmd %x: failed to allocate descriptor\n", cmd);
111 dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, DMA_TO_DEVICE);
112 ret = -ENOMEM;
113 goto err_unlock;
114 }
115
116 cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
117 PRUETH_NAV_PS_DATA_SIZE);
118 cppi5_hdesc_set_pkttype(first_desc, PRUETH_PKT_TYPE_CMD);
119 epib = first_desc->epib;
120 epib[0] = 0;
121 epib[1] = 0;
122
123 cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
124 swdata = cppi5_hdesc_get_swdata(first_desc);
125 *swdata = data;
126
127 cppi5_hdesc_set_pktlen(first_desc, pkt_len);
128 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
129
130 /* send command */
131 reinit_completion(&emac->cmd_complete);
132 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
133 if (ret) {
134 netdev_err(emac->ndev, "cmd %x: push failed: %d\n", cmd, ret);
135 goto free_desc;
136 }
137 ret = wait_for_completion_timeout(&emac->cmd_complete, msecs_to_jiffies(100));
138 if (!ret)
139 netdev_err(emac->ndev, "cmd %x: completion timeout\n", cmd);
140
141 mutex_unlock(&emac->cmd_lock);
142
143 return ret;
144 free_desc:
145 prueth_xmit_free(tx_chn, first_desc);
146 err_unlock:
147 mutex_unlock(&emac->cmd_lock);
148
149 return ret;
150 }
151
152 static void icssg_config_set_speed_sr1(struct prueth_emac *emac)
153 {
154 u32 cmd = ICSSG_PSTATE_SPEED_DUPLEX_CMD_SR1, val;
155 struct prueth *prueth = emac->prueth;
156 int slice = prueth_emac_slice(emac);
157
158 val = icssg_rgmii_get_speed(prueth->miig_rt, slice);
159 /* firmware expects speed settings in bit 2-1 */
160 val <<= 1;
161 cmd |= val;
162
163 val = icssg_rgmii_get_fullduplex(prueth->miig_rt, slice);
164 /* firmware expects full duplex settings in bit 3 */
165 val <<= 3;
166 cmd |= val;
167
168 emac_send_command_sr1(emac, cmd);
169 }
170
171 /* called back by PHY layer if there is change in link state of hw port*/
172 static void emac_adjust_link_sr1(struct net_device *ndev)
173 {
174 struct prueth_emac *emac = netdev_priv(ndev);
175 struct phy_device *phydev = ndev->phydev;
176 struct prueth *prueth = emac->prueth;
177 bool new_state = false;
178 unsigned long flags;
179
180 if (phydev->link) {
181 /* check the mode of operation - full/half duplex */
182 if (phydev->duplex != emac->duplex) {
183 new_state = true;
184 emac->duplex = phydev->duplex;
185 }
186 if (phydev->speed != emac->speed) {
187 new_state = true;
188 emac->speed = phydev->speed;
189 }
190 if (!emac->link) {
191 new_state = true;
192 emac->link = 1;
193 }
194 } else if (emac->link) {
195 new_state = true;
196 emac->link = 0;
197
198 /* f/w should support 100 & 1000 */
199 emac->speed = SPEED_1000;
200
201 /* half duplex may not be supported by f/w */
202 emac->duplex = DUPLEX_FULL;
203 }
204
205 if (new_state) {
206 phy_print_status(phydev);
207
208 /* update RGMII and MII configuration based on PHY negotiated
209 * values
210 */
211 if (emac->link) {
212 /* Set the RGMII cfg for gig en and full duplex */
213 icssg_update_rgmii_cfg(prueth->miig_rt, emac);
214
215 /* update the Tx IPG based on 100M/1G speed */
216 spin_lock_irqsave(&emac->lock, flags);
217 icssg_config_ipg(emac);
218 spin_unlock_irqrestore(&emac->lock, flags);
219 icssg_config_set_speed_sr1(emac);
220 }
221 }
222
223 if (emac->link) {
224 /* reactivate the transmit queue */
225 netif_tx_wake_all_queues(ndev);
226 } else {
227 netif_tx_stop_all_queues(ndev);
228 prueth_cleanup_tx_ts(emac);
229 }
230 }
231
232 static int emac_phy_connect(struct prueth_emac *emac)
233 {
234 struct prueth *prueth = emac->prueth;
235 struct net_device *ndev = emac->ndev;
236 /* connect PHY */
237 ndev->phydev = of_phy_connect(emac->ndev, emac->phy_node,
238 &emac_adjust_link_sr1, 0,
239 emac->phy_if);
240 if (!ndev->phydev) {
241 dev_err(prueth->dev, "couldn't connect to phy %s\n",
242 emac->phy_node->full_name);
243 return -ENODEV;
244 }
245
246 if (!emac->half_duplex) {
247 dev_dbg(prueth->dev, "half duplex mode is not supported\n");
248 phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
249 }
250
251 /* Remove 100Mbits half-duplex due to RGMII misreporting connection
252 * as full duplex */
253 phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
254
255 /* remove unsupported modes */
256 phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
257 phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT);
258 phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
259
260 if (emac->phy_if == PHY_INTERFACE_MODE_MII)
261 phy_set_max_speed(ndev->phydev, SPEED_100);
262
263 return 0;
264 }
265
266 /* get one packet from requested flow_id
267 *
268 * Returns skb pointer if packet found else NULL
269 * Caller must free the returned skb.
270 */
271 static struct sk_buff *prueth_process_rx_mgm(struct prueth_emac *emac,
272 u32 flow_id)
273 {
274 struct prueth_rx_chn *rx_chn = &emac->rx_mgm_chn;
275 struct net_device *ndev = emac->ndev;
276 struct cppi5_host_desc_t *desc_rx;
277 struct sk_buff *skb, *new_skb;
278 dma_addr_t desc_dma, buf_dma;
279 u32 buf_dma_len, pkt_len;
280 void **swdata;
281 int ret;
282
283 ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_id, &desc_dma);
284 if (ret) {
285 if (ret != -ENODATA)
286 netdev_err(ndev, "rx mgm pop: failed: %d\n", ret);
287 return NULL;
288 }
289
290 if (cppi5_desc_is_tdcm(desc_dma)) /* Teardown */
291 return NULL;
292
293 desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
294
295 /* Fix FW bug about incorrect PSDATA size */
296 if (cppi5_hdesc_get_psdata_size(desc_rx) != PRUETH_NAV_PS_DATA_SIZE) {
297 cppi5_hdesc_update_psdata_size(desc_rx,
298 PRUETH_NAV_PS_DATA_SIZE);
299 }
300
301 swdata = cppi5_hdesc_get_swdata(desc_rx);
302 skb = *swdata;
303 cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
304 pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
305
306 dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
307 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
308
309 new_skb = netdev_alloc_skb_ip_align(ndev, PRUETH_MAX_PKT_SIZE);
310 /* if allocation fails we drop the packet but push the
311 * descriptor back to the ring with old skb to prevent a stall
312 */
313 if (!new_skb) {
314 netdev_err(ndev,
315 "skb alloc failed, dropped mgm pkt from flow %d\n",
316 flow_id);
317 new_skb = skb;
318 skb = NULL; /* return NULL */
319 } else {
320 /* return the filled skb */
321 skb_put(skb, pkt_len);
322 }
323
324 /* queue another DMA */
325 ret = prueth_dma_rx_push(emac, new_skb, &emac->rx_mgm_chn);
326 if (WARN_ON(ret < 0))
327 dev_kfree_skb_any(new_skb);
328
329 return skb;
330 }
331
332 static void prueth_tx_ts_sr1(struct prueth_emac *emac,
333 struct emac_tx_ts_response_sr1 *tsr)
334 {
335 struct skb_shared_hwtstamps ssh;
336 u32 hi_ts, lo_ts, cookie;
337 struct sk_buff *skb;
338 u64 ns;
339
340 hi_ts = le32_to_cpu(tsr->hi_ts);
341 lo_ts = le32_to_cpu(tsr->lo_ts);
342
343 ns = (u64)hi_ts << 32 | lo_ts;
344
345 cookie = le32_to_cpu(tsr->cookie);
346 if (cookie >= PRUETH_MAX_TX_TS_REQUESTS) {
347 netdev_dbg(emac->ndev, "Invalid TX TS cookie 0x%x\n",
348 cookie);
349 return;
350 }
351
352 skb = emac->tx_ts_skb[cookie];
353 emac->tx_ts_skb[cookie] = NULL; /* free slot */
354
355 memset(&ssh, 0, sizeof(ssh));
356 ssh.hwtstamp = ns_to_ktime(ns);
357
358 skb_tstamp_tx(skb, &ssh);
359 dev_consume_skb_any(skb);
360 }
361
362 static irqreturn_t prueth_rx_mgm_ts_thread_sr1(int irq, void *dev_id)
363 {
364 struct prueth_emac *emac = dev_id;
365 struct sk_buff *skb;
366
367 skb = prueth_process_rx_mgm(emac, PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1);
368 if (!skb)
369 return IRQ_NONE;
370
371 prueth_tx_ts_sr1(emac, (void *)skb->data);
372 dev_kfree_skb_any(skb);
373
374 return IRQ_HANDLED;
375 }
376
377 static irqreturn_t prueth_rx_mgm_rsp_thread(int irq, void *dev_id)
378 {
379 struct prueth_emac *emac = dev_id;
380 struct sk_buff *skb;
381 u32 rsp;
382
383 skb = prueth_process_rx_mgm(emac, PRUETH_RX_MGM_FLOW_RESPONSE_SR1);
384 if (!skb)
385 return IRQ_NONE;
386
387 /* Process command response */
388 rsp = le32_to_cpu(*(__le32 *)skb->data) & 0xffff0000;
389 if (rsp == ICSSG_SHUTDOWN_CMD_SR1) {
390 netdev_dbg(emac->ndev, "f/w Shutdown cmd resp %x\n", rsp);
391 complete(&emac->cmd_complete);
392 } else if (rsp == ICSSG_PSTATE_SPEED_DUPLEX_CMD_SR1) {
393 netdev_dbg(emac->ndev, "f/w Speed/Duplex cmd rsp %x\n", rsp);
394 complete(&emac->cmd_complete);
395 }
396
397 dev_kfree_skb_any(skb);
398
399 return IRQ_HANDLED;
400 }
401
402 static struct icssg_firmwares icssg_sr1_emac_firmwares[] = {
403 {
404 .pru = "ti-pruss/am65x-pru0-prueth-fw.elf",
405 .rtu = "ti-pruss/am65x-rtu0-prueth-fw.elf",
406 },
407 {
408 .pru = "ti-pruss/am65x-pru1-prueth-fw.elf",
409 .rtu = "ti-pruss/am65x-rtu1-prueth-fw.elf",
410 }
411 };
412
413 static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac)
414 {
415 struct icssg_firmwares *firmwares;
416 struct device *dev = prueth->dev;
417 int slice, ret;
418
419 firmwares = icssg_sr1_emac_firmwares;
420
421 slice = prueth_emac_slice(emac);
422 if (slice < 0) {
423 netdev_err(emac->ndev, "invalid port\n");
424 return -EINVAL;
425 }
426
427 icssg_config_sr1(prueth, emac, slice);
428
429 ret = rproc_set_firmware(prueth->pru[slice], firmwares[slice].pru);
430 ret = rproc_boot(prueth->pru[slice]);
431 if (ret) {
432 dev_err(dev, "failed to boot PRU%d: %d\n", slice, ret);
433 return -EINVAL;
434 }
435
436 ret = rproc_set_firmware(prueth->rtu[slice], firmwares[slice].rtu);
437 ret = rproc_boot(prueth->rtu[slice]);
438 if (ret) {
439 dev_err(dev, "failed to boot RTU%d: %d\n", slice, ret);
440 goto halt_pru;
441 }
442
443 emac->fw_running = 1;
444 return 0;
445
446 halt_pru:
447 rproc_shutdown(prueth->pru[slice]);
448
449 return ret;
450 }
451
452 /**
453 * emac_ndo_open - EMAC device open
454 * @ndev: network adapter device
455 *
456 * Called when system wants to start the interface.
457 *
458 * Return: 0 for a successful open, or appropriate error code
459 */
460 static int emac_ndo_open(struct net_device *ndev)
461 {
462 struct prueth_emac *emac = netdev_priv(ndev);
463 int num_data_chn = emac->tx_ch_num - 1;
464 struct prueth *prueth = emac->prueth;
465 int slice = prueth_emac_slice(emac);
466 struct device *dev = prueth->dev;
467 int max_rx_flows, rx_flow;
468 int ret, i;
469
470 /* clear SMEM and MSMC settings for all slices */
471 if (!prueth->emacs_initialized) {
472 memset_io(prueth->msmcram.va, 0, prueth->msmcram.size);
473 memset_io(prueth->shram.va, 0, ICSSG_CONFIG_OFFSET_SLICE1 * PRUETH_NUM_MACS);
474 }
475
476 /* set h/w MAC as user might have re-configured */
477 ether_addr_copy(emac->mac_addr, ndev->dev_addr);
478
479 icssg_class_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr);
480
481 icssg_class_default(prueth->miig_rt, slice, 0, true);
482
483 /* Notify the stack of the actual queue counts. */
484 ret = netif_set_real_num_tx_queues(ndev, num_data_chn);
485 if (ret) {
486 dev_err(dev, "cannot set real number of tx queues\n");
487 return ret;
488 }
489
490 init_completion(&emac->cmd_complete);
491 ret = prueth_init_tx_chns(emac);
492 if (ret) {
493 dev_err(dev, "failed to init tx channel: %d\n", ret);
494 return ret;
495 }
496
497 max_rx_flows = PRUETH_MAX_RX_FLOWS_SR1;
498 ret = prueth_init_rx_chns(emac, &emac->rx_chns, "rx",
499 max_rx_flows, PRUETH_MAX_RX_DESC);
500 if (ret) {
501 dev_err(dev, "failed to init rx channel: %d\n", ret);
502 goto cleanup_tx;
503 }
504
505 ret = prueth_init_rx_chns(emac, &emac->rx_mgm_chn, "rxmgm",
506 PRUETH_MAX_RX_MGM_FLOWS_SR1,
507 PRUETH_MAX_RX_MGM_DESC_SR1);
508 if (ret) {
509 dev_err(dev, "failed to init rx mgmt channel: %d\n",
510 ret);
511 goto cleanup_rx;
512 }
513
514 ret = prueth_ndev_add_tx_napi(emac);
515 if (ret)
516 goto cleanup_rx_mgm;
517
518 /* we use only the highest priority flow for now i.e. @irq[3] */
519 rx_flow = PRUETH_RX_FLOW_DATA_SR1;
520 ret = request_irq(emac->rx_chns.irq[rx_flow], prueth_rx_irq,
521 IRQF_TRIGGER_HIGH, dev_name(dev), emac);
522 if (ret) {
523 dev_err(dev, "unable to request RX IRQ\n");
524 goto cleanup_napi;
525 }
526
527 ret = request_threaded_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1],
528 NULL, prueth_rx_mgm_rsp_thread,
529 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
530 dev_name(dev), emac);
531 if (ret) {
532 dev_err(dev, "unable to request RX Management RSP IRQ\n");
533 goto free_rx_irq;
534 }
535
536 ret = request_threaded_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1],
537 NULL, prueth_rx_mgm_ts_thread_sr1,
538 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
539 dev_name(dev), emac);
540 if (ret) {
541 dev_err(dev, "unable to request RX Management TS IRQ\n");
542 goto free_rx_mgm_rsp_irq;
543 }
544
545 /* reset and start PRU firmware */
546 ret = prueth_emac_start(prueth, emac);
547 if (ret)
548 goto free_rx_mgmt_ts_irq;
549
550 icssg_mii_update_mtu(prueth->mii_rt, slice, ndev->max_mtu);
551
552 /* Prepare RX */
553 ret = prueth_prepare_rx_chan(emac, &emac->rx_chns, PRUETH_MAX_PKT_SIZE);
554 if (ret)
555 goto stop;
556
557 ret = prueth_prepare_rx_chan(emac, &emac->rx_mgm_chn, 64);
558 if (ret)
559 goto reset_rx_chn;
560
561 ret = k3_udma_glue_enable_rx_chn(emac->rx_mgm_chn.rx_chn);
562 if (ret)
563 goto reset_rx_chn;
564
565 ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn);
566 if (ret)
567 goto reset_rx_mgm_chn;
568
569 for (i = 0; i < emac->tx_ch_num; i++) {
570 ret = k3_udma_glue_enable_tx_chn(emac->tx_chns[i].tx_chn);
571 if (ret)
572 goto reset_tx_chan;
573 }
574
575 /* Enable NAPI in Tx and Rx direction */
576 for (i = 0; i < emac->tx_ch_num; i++)
577 napi_enable(&emac->tx_chns[i].napi_tx);
578 napi_enable(&emac->napi_rx);
579
580 /* start PHY */
581 phy_start(ndev->phydev);
582
583 prueth->emacs_initialized++;
584
585 queue_work(system_long_wq, &emac->stats_work.work);
586
587 return 0;
588
589 reset_tx_chan:
590 /* Since interface is not yet up, there is wouldn't be
591 * any SKB for completion. So set false to free_skb
592 */
593 prueth_reset_tx_chan(emac, i, false);
594 reset_rx_mgm_chn:
595 prueth_reset_rx_chan(&emac->rx_mgm_chn,
596 PRUETH_MAX_RX_MGM_FLOWS_SR1, true);
597 reset_rx_chn:
598 prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, false);
599 stop:
600 prueth_emac_stop(emac);
601 free_rx_mgmt_ts_irq:
602 free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1],
603 emac);
604 free_rx_mgm_rsp_irq:
605 free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1],
606 emac);
607 free_rx_irq:
608 free_irq(emac->rx_chns.irq[rx_flow], emac);
609 cleanup_napi:
610 prueth_ndev_del_tx_napi(emac, emac->tx_ch_num);
611 cleanup_rx_mgm:
612 prueth_cleanup_rx_chns(emac, &emac->rx_mgm_chn,
613 PRUETH_MAX_RX_MGM_FLOWS_SR1);
614 cleanup_rx:
615 prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows);
616 cleanup_tx:
617 prueth_cleanup_tx_chns(emac);
618
619 return ret;
620 }
621
622 /**
623 * emac_ndo_stop - EMAC device stop
624 * @ndev: network adapter device
625 *
626 * Called when system wants to stop or down the interface.
627 *
628 * Return: Always 0 (Success)
629 */
630 static int emac_ndo_stop(struct net_device *ndev)
631 {
632 struct prueth_emac *emac = netdev_priv(ndev);
633 int rx_flow = PRUETH_RX_FLOW_DATA_SR1;
634 struct prueth *prueth = emac->prueth;
635 int max_rx_flows;
636 int ret, i;
637
638 /* inform the upper layers. */
639 netif_tx_stop_all_queues(ndev);
640
641 /* block packets from wire */
642 if (ndev->phydev)
643 phy_stop(ndev->phydev);
644
645 icssg_class_disable(prueth->miig_rt, prueth_emac_slice(emac));
646
647 emac_send_command_sr1(emac, ICSSG_SHUTDOWN_CMD_SR1);
648
649 atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
650 /* ensure new tdown_cnt value is visible */
651 smp_mb__after_atomic();
652 /* tear down and disable UDMA channels */
653 reinit_completion(&emac->tdown_complete);
654 for (i = 0; i < emac->tx_ch_num; i++)
655 k3_udma_glue_tdown_tx_chn(emac->tx_chns[i].tx_chn, false);
656
657 ret = wait_for_completion_timeout(&emac->tdown_complete,
658 msecs_to_jiffies(1000));
659 if (!ret)
660 netdev_err(ndev, "tx teardown timeout\n");
661
662 prueth_reset_tx_chan(emac, emac->tx_ch_num, true);
663 for (i = 0; i < emac->tx_ch_num; i++)
664 napi_disable(&emac->tx_chns[i].napi_tx);
665
666 max_rx_flows = PRUETH_MAX_RX_FLOWS_SR1;
667 k3_udma_glue_tdown_rx_chn(emac->rx_chns.rx_chn, true);
668
669 prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, true);
670 /* Teardown RX MGM channel */
671 k3_udma_glue_tdown_rx_chn(emac->rx_mgm_chn.rx_chn, true);
672 prueth_reset_rx_chan(&emac->rx_mgm_chn,
673 PRUETH_MAX_RX_MGM_FLOWS_SR1, true);
674
675 napi_disable(&emac->napi_rx);
676
677 /* Destroying the queued work in ndo_stop() */
678 cancel_delayed_work_sync(&emac->stats_work);
679
680 /* stop PRUs */
681 prueth_emac_stop(emac);
682
683 free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_TIMESTAMP_SR1], emac);
684 free_irq(emac->rx_mgm_chn.irq[PRUETH_RX_MGM_FLOW_RESPONSE_SR1], emac);
685 free_irq(emac->rx_chns.irq[rx_flow], emac);
686 prueth_ndev_del_tx_napi(emac, emac->tx_ch_num);
687 prueth_cleanup_tx_chns(emac);
688
689 prueth_cleanup_rx_chns(emac, &emac->rx_mgm_chn, PRUETH_MAX_RX_MGM_FLOWS_SR1);
690 prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows);
691
692 prueth->emacs_initialized--;
693
694 return 0;
695 }
696
697 static void emac_ndo_set_rx_mode_sr1(struct net_device *ndev)
698 {
699 struct prueth_emac *emac = netdev_priv(ndev);
700 bool allmulti = ndev->flags & IFF_ALLMULTI;
701 bool promisc = ndev->flags & IFF_PROMISC;
702 struct prueth *prueth = emac->prueth;
703 int slice = prueth_emac_slice(emac);
704
705 if (promisc) {
706 icssg_class_promiscuous_sr1(prueth->miig_rt, slice);
707 return;
708 }
709
710 if (allmulti) {
711 icssg_class_default(prueth->miig_rt, slice, 1, true);
712 return;
713 }
714
715 icssg_class_default(prueth->miig_rt, slice, 0, true);
716 if (!netdev_mc_empty(ndev)) {
717 /* program multicast address list into Classifier */
718 icssg_class_add_mcast_sr1(prueth->miig_rt, slice, ndev);
719 }
720 }
721
722 static const struct net_device_ops emac_netdev_ops = {
723 .ndo_open = emac_ndo_open,
724 .ndo_stop = emac_ndo_stop,
725 .ndo_start_xmit = icssg_ndo_start_xmit,
726 .ndo_set_mac_address = eth_mac_addr,
727 .ndo_validate_addr = eth_validate_addr,
728 .ndo_tx_timeout = icssg_ndo_tx_timeout,
729 .ndo_set_rx_mode = emac_ndo_set_rx_mode_sr1,
730 .ndo_eth_ioctl = icssg_ndo_ioctl,
731 .ndo_get_stats64 = icssg_ndo_get_stats64,
732 .ndo_get_phys_port_name = icssg_ndo_get_phys_port_name,
733 };
734
735 static int prueth_netdev_init(struct prueth *prueth,
736 struct device_node *eth_node)
737 {
738 struct prueth_emac *emac;
739 struct net_device *ndev;
740 enum prueth_port port;
741 enum prueth_mac mac;
742 /* Only enable one TX channel due to timeouts when
743 * using multiple channels */
744 int num_tx_chn = 1;
745 int ret;
746
747 port = prueth_node_port(eth_node);
748 if (port == PRUETH_PORT_INVALID)
749 return -EINVAL;
750
751 mac = prueth_node_mac(eth_node);
752 if (mac == PRUETH_MAC_INVALID)
753 return -EINVAL;
754
755 ndev = alloc_etherdev_mq(sizeof(*emac), num_tx_chn);
756 if (!ndev)
757 return -ENOMEM;
758
759 emac = netdev_priv(ndev);
760 emac->is_sr1 = 1;
761 emac->prueth = prueth;
762 emac->ndev = ndev;
763 emac->port_id = port;
764 emac->cmd_wq = create_singlethread_workqueue("icssg_cmd_wq");
765 if (!emac->cmd_wq) {
766 ret = -ENOMEM;
767 goto free_ndev;
768 }
769
770 INIT_DELAYED_WORK(&emac->stats_work, icssg_stats_work_handler);
771
772 ret = pruss_request_mem_region(prueth->pruss,
773 port == PRUETH_PORT_MII0 ?
774 PRUSS_MEM_DRAM0 : PRUSS_MEM_DRAM1,
775 &emac->dram);
776 if (ret) {
777 dev_err(prueth->dev, "unable to get DRAM: %d\n", ret);
778 ret = -ENOMEM;
779 goto free_wq;
780 }
781
782 /* SR1.0 uses a dedicated high priority channel
783 * to send commands to the firmware
784 */
785 emac->tx_ch_num = 2;
786
787 SET_NETDEV_DEV(ndev, prueth->dev);
788 spin_lock_init(&emac->lock);
789 mutex_init(&emac->cmd_lock);
790
791 emac->phy_node = of_parse_phandle(eth_node, "phy-handle", 0);
792 if (!emac->phy_node && !of_phy_is_fixed_link(eth_node)) {
793 dev_err(prueth->dev, "couldn't find phy-handle\n");
794 ret = -ENODEV;
795 goto free;
796 } else if (of_phy_is_fixed_link(eth_node)) {
797 ret = of_phy_register_fixed_link(eth_node);
798 if (ret) {
799 ret = dev_err_probe(prueth->dev, ret,
800 "failed to register fixed-link phy\n");
801 goto free;
802 }
803
804 emac->phy_node = eth_node;
805 }
806
807 ret = of_get_phy_mode(eth_node, &emac->phy_if);
808 if (ret) {
809 dev_err(prueth->dev, "could not get phy-mode property\n");
810 goto free;
811 }
812
813 if (emac->phy_if != PHY_INTERFACE_MODE_MII &&
814 !phy_interface_mode_is_rgmii(emac->phy_if)) {
815 dev_err(prueth->dev, "PHY mode unsupported %s\n", phy_modes(emac->phy_if));
816 ret = -EINVAL;
817 goto free;
818 }
819
820 /* AM65 SR2.0 has TX Internal delay always enabled by hardware
821 * and it is not possible to disable TX Internal delay. The below
822 * switch case block describes how we handle different phy modes
823 * based on hardware restriction.
824 */
825 switch (emac->phy_if) {
826 case PHY_INTERFACE_MODE_RGMII_ID:
827 emac->phy_if = PHY_INTERFACE_MODE_RGMII_RXID;
828 break;
829 case PHY_INTERFACE_MODE_RGMII_TXID:
830 emac->phy_if = PHY_INTERFACE_MODE_RGMII;
831 break;
832 case PHY_INTERFACE_MODE_RGMII:
833 case PHY_INTERFACE_MODE_RGMII_RXID:
834 dev_err(prueth->dev, "RGMII mode without TX delay is not supported");
835 ret = -EINVAL;
836 goto free;
837 default:
838 break;
839 }
840
841 /* get mac address from DT and set private and netdev addr */
842 ret = of_get_ethdev_address(eth_node, ndev);
843 if (!is_valid_ether_addr(ndev->dev_addr)) {
844 eth_hw_addr_random(ndev);
845 dev_warn(prueth->dev, "port %d: using random MAC addr: %pM\n",
846 port, ndev->dev_addr);
847 }
848 ether_addr_copy(emac->mac_addr, ndev->dev_addr);
849
850 ndev->dev.of_node = eth_node;
851 ndev->min_mtu = PRUETH_MIN_PKT_SIZE;
852 ndev->max_mtu = PRUETH_MAX_MTU;
853 ndev->netdev_ops = &emac_netdev_ops;
854 ndev->ethtool_ops = &icssg_ethtool_ops;
855 ndev->hw_features = NETIF_F_SG;
856 ndev->features = ndev->hw_features;
857
858 netif_napi_add(ndev, &emac->napi_rx, icssg_napi_rx_poll);
859 prueth->emac[mac] = emac;
860
861 return 0;
862
863 free:
864 pruss_release_mem_region(prueth->pruss, &emac->dram);
865 free_wq:
866 destroy_workqueue(emac->cmd_wq);
867 free_ndev:
868 emac->ndev = NULL;
869 prueth->emac[mac] = NULL;
870 free_netdev(ndev);
871
872 return ret;
873 }
874
875 static int prueth_probe(struct platform_device *pdev)
876 {
877 struct device_node *eth_node, *eth_ports_node;
878 struct device_node *eth0_node = NULL;
879 struct device_node *eth1_node = NULL;
880 struct device *dev = &pdev->dev;
881 struct device_node *np;
882 struct prueth *prueth;
883 struct pruss *pruss;
884 u32 msmc_ram_size;
885 int i, ret;
886
887 np = dev->of_node;
888
889 prueth = devm_kzalloc(dev, sizeof(*prueth), GFP_KERNEL);
890 if (!prueth)
891 return -ENOMEM;
892
893 dev_set_drvdata(dev, prueth);
894 prueth->pdev = pdev;
895 prueth->pdata = *(const struct prueth_pdata *)device_get_match_data(dev);
896
897 prueth->dev = dev;
898 eth_ports_node = of_get_child_by_name(np, "ethernet-ports");
899 if (!eth_ports_node)
900 return -ENOENT;
901
902 for_each_child_of_node(eth_ports_node, eth_node) {
903 u32 reg;
904
905 if (strcmp(eth_node->name, "port"))
906 continue;
907 ret = of_property_read_u32(eth_node, "reg", &reg);
908 if (ret < 0) {
909 dev_err(dev, "%pOF error reading port_id %d\n",
910 eth_node, ret);
911 }
912
913 of_node_get(eth_node);
914
915 if (reg == 0) {
916 eth0_node = eth_node;
917 if (!of_device_is_available(eth0_node)) {
918 of_node_put(eth0_node);
919 eth0_node = NULL;
920 }
921 } else if (reg == 1) {
922 eth1_node = eth_node;
923 if (!of_device_is_available(eth1_node)) {
924 of_node_put(eth1_node);
925 eth1_node = NULL;
926 }
927 } else {
928 dev_err(dev, "port reg should be 0 or 1\n");
929 }
930 }
931
932 of_node_put(eth_ports_node);
933
934 /* At least one node must be present and available else we fail */
935 if (!eth0_node && !eth1_node) {
936 dev_err(dev, "neither port0 nor port1 node available\n");
937 return -ENODEV;
938 }
939
940 if (eth0_node == eth1_node) {
941 dev_err(dev, "port0 and port1 can't have same reg\n");
942 of_node_put(eth0_node);
943 return -ENODEV;
944 }
945
946 prueth->eth_node[PRUETH_MAC0] = eth0_node;
947 prueth->eth_node[PRUETH_MAC1] = eth1_node;
948
949 prueth->miig_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-g-rt");
950 if (IS_ERR(prueth->miig_rt)) {
951 dev_err(dev, "couldn't get ti,mii-g-rt syscon regmap\n");
952 return -ENODEV;
953 }
954
955 prueth->mii_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-rt");
956 if (IS_ERR(prueth->mii_rt)) {
957 dev_err(dev, "couldn't get ti,mii-rt syscon regmap\n");
958 return -ENODEV;
959 }
960
961 if (eth0_node) {
962 ret = prueth_get_cores(prueth, ICSS_SLICE0, true);
963 if (ret)
964 goto put_cores;
965 }
966
967 if (eth1_node) {
968 ret = prueth_get_cores(prueth, ICSS_SLICE1, true);
969 if (ret)
970 goto put_cores;
971 }
972
973 pruss = pruss_get(eth0_node ?
974 prueth->pru[ICSS_SLICE0] : prueth->pru[ICSS_SLICE1]);
975 if (IS_ERR(pruss)) {
976 ret = PTR_ERR(pruss);
977 dev_err(dev, "unable to get pruss handle\n");
978 goto put_cores;
979 }
980
981 prueth->pruss = pruss;
982
983 ret = pruss_request_mem_region(pruss, PRUSS_MEM_SHRD_RAM2,
984 &prueth->shram);
985 if (ret) {
986 dev_err(dev, "unable to get PRUSS SHRD RAM2: %d\n", ret);
987 goto put_pruss;
988 }
989
990 prueth->sram_pool = of_gen_pool_get(np, "sram", 0);
991 if (!prueth->sram_pool) {
992 dev_err(dev, "unable to get SRAM pool\n");
993 ret = -ENODEV;
994
995 goto put_mem;
996 }
997
998 msmc_ram_size = MSMC_RAM_SIZE_SR1;
999
1000 prueth->msmcram.va = (void __iomem *)gen_pool_alloc(prueth->sram_pool,
1001 msmc_ram_size);
1002
1003 if (!prueth->msmcram.va) {
1004 ret = -ENOMEM;
1005 dev_err(dev, "unable to allocate MSMC resource\n");
1006 goto put_mem;
1007 }
1008 prueth->msmcram.pa = gen_pool_virt_to_phys(prueth->sram_pool,
1009 (unsigned long)prueth->msmcram.va);
1010 prueth->msmcram.size = msmc_ram_size;
1011 memset_io(prueth->msmcram.va, 0, msmc_ram_size);
1012 dev_dbg(dev, "sram: pa %llx va %p size %zx\n", prueth->msmcram.pa,
1013 prueth->msmcram.va, prueth->msmcram.size);
1014
1015 prueth->iep0 = icss_iep_get_idx(np, 0);
1016 if (IS_ERR(prueth->iep0)) {
1017 ret = dev_err_probe(dev, PTR_ERR(prueth->iep0),
1018 "iep0 get failed\n");
1019 goto free_pool;
1020 }
1021
1022 prueth->iep1 = icss_iep_get_idx(np, 1);
1023 if (IS_ERR(prueth->iep1)) {
1024 ret = dev_err_probe(dev, PTR_ERR(prueth->iep1),
1025 "iep1 get failed\n");
1026 goto put_iep0;
1027 }
1028
1029 ret = icss_iep_init(prueth->iep0, NULL, NULL, 0);
1030 if (ret) {
1031 dev_err_probe(dev, ret, "failed to init iep0\n");
1032 goto put_iep;
1033 }
1034
1035 ret = icss_iep_init(prueth->iep1, NULL, NULL, 0);
1036 if (ret) {
1037 dev_err_probe(dev, ret, "failed to init iep1\n");
1038 goto exit_iep0;
1039 }
1040
1041 if (eth0_node) {
1042 ret = prueth_netdev_init(prueth, eth0_node);
1043 if (ret) {
1044 dev_err_probe(dev, ret, "netdev init %s failed\n",
1045 eth0_node->name);
1046 goto exit_iep;
1047 }
1048
1049 prueth->emac[PRUETH_MAC0]->half_duplex =
1050 of_property_read_bool(eth0_node, "ti,half-duplex-capable");
1051
1052 prueth->emac[PRUETH_MAC0]->iep = prueth->iep0;
1053 }
1054
1055 if (eth1_node) {
1056 ret = prueth_netdev_init(prueth, eth1_node);
1057 if (ret) {
1058 dev_err_probe(dev, ret, "netdev init %s failed\n",
1059 eth1_node->name);
1060 goto netdev_exit;
1061 }
1062
1063 prueth->emac[PRUETH_MAC1]->half_duplex =
1064 of_property_read_bool(eth1_node, "ti,half-duplex-capable");
1065
1066 prueth->emac[PRUETH_MAC1]->iep = prueth->iep1;
1067 }
1068
1069 /* register the network devices */
1070 if (eth0_node) {
1071 ret = register_netdev(prueth->emac[PRUETH_MAC0]->ndev);
1072 if (ret) {
1073 dev_err(dev, "can't register netdev for port MII0\n");
1074 goto netdev_exit;
1075 }
1076
1077 prueth->registered_netdevs[PRUETH_MAC0] = prueth->emac[PRUETH_MAC0]->ndev;
1078 emac_phy_connect(prueth->emac[PRUETH_MAC0]);
1079 phy_attached_info(prueth->emac[PRUETH_MAC0]->ndev->phydev);
1080 }
1081
1082 if (eth1_node) {
1083 ret = register_netdev(prueth->emac[PRUETH_MAC1]->ndev);
1084 if (ret) {
1085 dev_err(dev, "can't register netdev for port MII1\n");
1086 goto netdev_unregister;
1087 }
1088
1089 prueth->registered_netdevs[PRUETH_MAC1] = prueth->emac[PRUETH_MAC1]->ndev;
1090 emac_phy_connect(prueth->emac[PRUETH_MAC1]);
1091 phy_attached_info(prueth->emac[PRUETH_MAC1]->ndev->phydev);
1092 }
1093
1094 dev_info(dev, "TI PRU SR1.0 ethernet driver initialized: %s EMAC mode\n",
1095 (!eth0_node || !eth1_node) ? "single" : "dual");
1096
1097 if (eth1_node)
1098 of_node_put(eth1_node);
1099 if (eth0_node)
1100 of_node_put(eth0_node);
1101
1102 return 0;
1103
1104 netdev_unregister:
1105 for (i = 0; i < PRUETH_NUM_MACS; i++) {
1106 if (!prueth->registered_netdevs[i])
1107 continue;
1108
1109 if (prueth->emac[i]->ndev->phydev) {
1110 phy_disconnect(prueth->emac[i]->ndev->phydev);
1111 prueth->emac[i]->ndev->phydev = NULL;
1112 }
1113 unregister_netdev(prueth->registered_netdevs[i]);
1114 }
1115
1116 netdev_exit:
1117 for (i = 0; i < PRUETH_NUM_MACS; i++) {
1118 eth_node = prueth->eth_node[i];
1119 if (!eth_node)
1120 continue;
1121
1122 prueth_netdev_exit(prueth, eth_node);
1123 }
1124
1125 exit_iep:
1126 icss_iep_exit(prueth->iep1);
1127 exit_iep0:
1128 icss_iep_exit(prueth->iep0);
1129
1130 put_iep:
1131 icss_iep_put(prueth->iep1);
1132
1133 put_iep0:
1134 icss_iep_put(prueth->iep0);
1135 prueth->iep0 = NULL;
1136 prueth->iep1 = NULL;
1137
1138 free_pool:
1139 gen_pool_free(prueth->sram_pool,
1140 (unsigned long)prueth->msmcram.va, msmc_ram_size);
1141
1142 put_mem:
1143 pruss_release_mem_region(prueth->pruss, &prueth->shram);
1144
1145 put_pruss:
1146 pruss_put(prueth->pruss);
1147
1148 put_cores:
1149 if (eth1_node) {
1150 prueth_put_cores(prueth, ICSS_SLICE1);
1151 of_node_put(eth1_node);
1152 }
1153
1154 if (eth0_node) {
1155 prueth_put_cores(prueth, ICSS_SLICE0);
1156 of_node_put(eth0_node);
1157 }
1158
1159 return ret;
1160 }
1161
1162 static void prueth_remove(struct platform_device *pdev)
1163 {
1164 struct prueth *prueth = platform_get_drvdata(pdev);
1165 struct device_node *eth_node;
1166 int i;
1167
1168 for (i = 0; i < PRUETH_NUM_MACS; i++) {
1169 if (!prueth->registered_netdevs[i])
1170 continue;
1171 phy_stop(prueth->emac[i]->ndev->phydev);
1172 phy_disconnect(prueth->emac[i]->ndev->phydev);
1173 prueth->emac[i]->ndev->phydev = NULL;
1174 unregister_netdev(prueth->registered_netdevs[i]);
1175 }
1176
1177 for (i = 0; i < PRUETH_NUM_MACS; i++) {
1178 eth_node = prueth->eth_node[i];
1179 if (!eth_node)
1180 continue;
1181
1182 prueth_netdev_exit(prueth, eth_node);
1183 }
1184
1185 icss_iep_exit(prueth->iep1);
1186 icss_iep_exit(prueth->iep0);
1187
1188 icss_iep_put(prueth->iep1);
1189 icss_iep_put(prueth->iep0);
1190
1191 gen_pool_free(prueth->sram_pool,
1192 (unsigned long)prueth->msmcram.va,
1193 MSMC_RAM_SIZE_SR1);
1194
1195 pruss_release_mem_region(prueth->pruss, &prueth->shram);
1196
1197 pruss_put(prueth->pruss);
1198
1199 if (prueth->eth_node[PRUETH_MAC1])
1200 prueth_put_cores(prueth, ICSS_SLICE1);
1201
1202 if (prueth->eth_node[PRUETH_MAC0])
1203 prueth_put_cores(prueth, ICSS_SLICE0);
1204 }
1205
1206 static const struct prueth_pdata am654_sr1_icssg_pdata = {
1207 .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
1208 };
1209
1210 static const struct of_device_id prueth_dt_match[] = {
1211 { .compatible = "ti,am654-sr1-icssg-prueth", .data = &am654_sr1_icssg_pdata },
1212 { /* sentinel */ }
1213 };
1214 MODULE_DEVICE_TABLE(of, prueth_dt_match);
1215
1216 static struct platform_driver prueth_driver = {
1217 .probe = prueth_probe,
1218 .remove = prueth_remove,
1219 .driver = {
1220 .name = "icssg-prueth-sr1",
1221 .of_match_table = prueth_dt_match,
1222 .pm = &prueth_dev_pm_ops,
1223 },
1224 };
1225 module_platform_driver(prueth_driver);
1226
1227 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
1228 MODULE_AUTHOR("Md Danish Anwar <danishanwar@ti.com>");
1229 MODULE_AUTHOR("Diogo Ivo <diogo.ivo@siemens.com>");
1230 MODULE_DESCRIPTION(PRUETH_MODULE_DESCRIPTION);
1231 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes