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Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming
[deliverable/linux.git] / drivers / net / ethernet / ti / cpsw.c
1 /*
2 * Texas Instruments Ethernet Switch Driver
3 *
4 * Copyright (C) 2012 Texas Instruments
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation version 2.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11 * kind, whether express or implied; without even the implied warranty
12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/io.h>
18 #include <linux/clk.h>
19 #include <linux/timer.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/irqreturn.h>
23 #include <linux/interrupt.h>
24 #include <linux/if_ether.h>
25 #include <linux/etherdevice.h>
26 #include <linux/netdevice.h>
27 #include <linux/phy.h>
28 #include <linux/workqueue.h>
29 #include <linux/delay.h>
30 #include <linux/pm_runtime.h>
31
32 #include <linux/platform_data/cpsw.h>
33
34 #include "cpsw_ale.h"
35 #include "davinci_cpdma.h"
36
37 #define CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
38 NETIF_MSG_DRV | NETIF_MSG_LINK | \
39 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
40 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
41 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
42 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
43 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
44 NETIF_MSG_RX_STATUS)
45
46 #define cpsw_info(priv, type, format, ...) \
47 do { \
48 if (netif_msg_##type(priv) && net_ratelimit()) \
49 dev_info(priv->dev, format, ## __VA_ARGS__); \
50 } while (0)
51
52 #define cpsw_err(priv, type, format, ...) \
53 do { \
54 if (netif_msg_##type(priv) && net_ratelimit()) \
55 dev_err(priv->dev, format, ## __VA_ARGS__); \
56 } while (0)
57
58 #define cpsw_dbg(priv, type, format, ...) \
59 do { \
60 if (netif_msg_##type(priv) && net_ratelimit()) \
61 dev_dbg(priv->dev, format, ## __VA_ARGS__); \
62 } while (0)
63
64 #define cpsw_notice(priv, type, format, ...) \
65 do { \
66 if (netif_msg_##type(priv) && net_ratelimit()) \
67 dev_notice(priv->dev, format, ## __VA_ARGS__); \
68 } while (0)
69
70 #define CPSW_MAJOR_VERSION(reg) (reg >> 8 & 0x7)
71 #define CPSW_MINOR_VERSION(reg) (reg & 0xff)
72 #define CPSW_RTL_VERSION(reg) ((reg >> 11) & 0x1f)
73
74 #define CPDMA_RXTHRESH 0x0c0
75 #define CPDMA_RXFREE 0x0e0
76 #define CPDMA_TXHDP 0x00
77 #define CPDMA_RXHDP 0x20
78 #define CPDMA_TXCP 0x40
79 #define CPDMA_RXCP 0x60
80
81 #define cpsw_dma_regs(base, offset) \
82 (void __iomem *)((base) + (offset))
83 #define cpsw_dma_rxthresh(base, offset) \
84 (void __iomem *)((base) + (offset) + CPDMA_RXTHRESH)
85 #define cpsw_dma_rxfree(base, offset) \
86 (void __iomem *)((base) + (offset) + CPDMA_RXFREE)
87 #define cpsw_dma_txhdp(base, offset) \
88 (void __iomem *)((base) + (offset) + CPDMA_TXHDP)
89 #define cpsw_dma_rxhdp(base, offset) \
90 (void __iomem *)((base) + (offset) + CPDMA_RXHDP)
91 #define cpsw_dma_txcp(base, offset) \
92 (void __iomem *)((base) + (offset) + CPDMA_TXCP)
93 #define cpsw_dma_rxcp(base, offset) \
94 (void __iomem *)((base) + (offset) + CPDMA_RXCP)
95
96 #define CPSW_POLL_WEIGHT 64
97 #define CPSW_MIN_PACKET_SIZE 60
98 #define CPSW_MAX_PACKET_SIZE (1500 + 14 + 4 + 4)
99
100 #define RX_PRIORITY_MAPPING 0x76543210
101 #define TX_PRIORITY_MAPPING 0x33221100
102 #define CPDMA_TX_PRIORITY_MAP 0x76543210
103
104 #define cpsw_enable_irq(priv) \
105 do { \
106 u32 i; \
107 for (i = 0; i < priv->num_irqs; i++) \
108 enable_irq(priv->irqs_table[i]); \
109 } while (0);
110 #define cpsw_disable_irq(priv) \
111 do { \
112 u32 i; \
113 for (i = 0; i < priv->num_irqs; i++) \
114 disable_irq_nosync(priv->irqs_table[i]); \
115 } while (0);
116
117 static int debug_level;
118 module_param(debug_level, int, 0);
119 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
120
121 static int ale_ageout = 10;
122 module_param(ale_ageout, int, 0);
123 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
124
125 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
126 module_param(rx_packet_max, int, 0);
127 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
128
129 struct cpsw_ss_regs {
130 u32 id_ver;
131 u32 soft_reset;
132 u32 control;
133 u32 int_control;
134 u32 rx_thresh_en;
135 u32 rx_en;
136 u32 tx_en;
137 u32 misc_en;
138 };
139
140 struct cpsw_regs {
141 u32 id_ver;
142 u32 control;
143 u32 soft_reset;
144 u32 stat_port_en;
145 u32 ptype;
146 };
147
148 struct cpsw_slave_regs {
149 u32 max_blks;
150 u32 blk_cnt;
151 u32 flow_thresh;
152 u32 port_vlan;
153 u32 tx_pri_map;
154 u32 ts_ctl;
155 u32 ts_seq_ltype;
156 u32 ts_vlan;
157 u32 sa_lo;
158 u32 sa_hi;
159 };
160
161 struct cpsw_host_regs {
162 u32 max_blks;
163 u32 blk_cnt;
164 u32 flow_thresh;
165 u32 port_vlan;
166 u32 tx_pri_map;
167 u32 cpdma_tx_pri_map;
168 u32 cpdma_rx_chan_map;
169 };
170
171 struct cpsw_sliver_regs {
172 u32 id_ver;
173 u32 mac_control;
174 u32 mac_status;
175 u32 soft_reset;
176 u32 rx_maxlen;
177 u32 __reserved_0;
178 u32 rx_pause;
179 u32 tx_pause;
180 u32 __reserved_1;
181 u32 rx_pri_map;
182 };
183
184 struct cpsw_slave {
185 struct cpsw_slave_regs __iomem *regs;
186 struct cpsw_sliver_regs __iomem *sliver;
187 int slave_num;
188 u32 mac_control;
189 struct cpsw_slave_data *data;
190 struct phy_device *phy;
191 };
192
193 struct cpsw_priv {
194 spinlock_t lock;
195 struct platform_device *pdev;
196 struct net_device *ndev;
197 struct resource *cpsw_res;
198 struct resource *cpsw_ss_res;
199 struct napi_struct napi;
200 struct device *dev;
201 struct cpsw_platform_data data;
202 struct cpsw_regs __iomem *regs;
203 struct cpsw_ss_regs __iomem *ss_regs;
204 struct cpsw_host_regs __iomem *host_port_regs;
205 u32 msg_enable;
206 struct net_device_stats stats;
207 int rx_packet_max;
208 int host_port;
209 struct clk *clk;
210 u8 mac_addr[ETH_ALEN];
211 struct cpsw_slave *slaves;
212 struct cpdma_ctlr *dma;
213 struct cpdma_chan *txch, *rxch;
214 struct cpsw_ale *ale;
215 /* snapshot of IRQ numbers */
216 u32 irqs_table[4];
217 u32 num_irqs;
218 };
219
220 #define napi_to_priv(napi) container_of(napi, struct cpsw_priv, napi)
221 #define for_each_slave(priv, func, arg...) \
222 do { \
223 int idx; \
224 for (idx = 0; idx < (priv)->data.slaves; idx++) \
225 (func)((priv)->slaves + idx, ##arg); \
226 } while (0)
227
228 static void cpsw_intr_enable(struct cpsw_priv *priv)
229 {
230 __raw_writel(0xFF, &priv->ss_regs->tx_en);
231 __raw_writel(0xFF, &priv->ss_regs->rx_en);
232
233 cpdma_ctlr_int_ctrl(priv->dma, true);
234 return;
235 }
236
237 static void cpsw_intr_disable(struct cpsw_priv *priv)
238 {
239 __raw_writel(0, &priv->ss_regs->tx_en);
240 __raw_writel(0, &priv->ss_regs->rx_en);
241
242 cpdma_ctlr_int_ctrl(priv->dma, false);
243 return;
244 }
245
246 void cpsw_tx_handler(void *token, int len, int status)
247 {
248 struct sk_buff *skb = token;
249 struct net_device *ndev = skb->dev;
250 struct cpsw_priv *priv = netdev_priv(ndev);
251
252 if (unlikely(netif_queue_stopped(ndev)))
253 netif_start_queue(ndev);
254 priv->stats.tx_packets++;
255 priv->stats.tx_bytes += len;
256 dev_kfree_skb_any(skb);
257 }
258
259 void cpsw_rx_handler(void *token, int len, int status)
260 {
261 struct sk_buff *skb = token;
262 struct net_device *ndev = skb->dev;
263 struct cpsw_priv *priv = netdev_priv(ndev);
264 int ret = 0;
265
266 /* free and bail if we are shutting down */
267 if (unlikely(!netif_running(ndev)) ||
268 unlikely(!netif_carrier_ok(ndev))) {
269 dev_kfree_skb_any(skb);
270 return;
271 }
272 if (likely(status >= 0)) {
273 skb_put(skb, len);
274 skb->protocol = eth_type_trans(skb, ndev);
275 netif_receive_skb(skb);
276 priv->stats.rx_bytes += len;
277 priv->stats.rx_packets++;
278 skb = NULL;
279 }
280
281 if (unlikely(!netif_running(ndev))) {
282 if (skb)
283 dev_kfree_skb_any(skb);
284 return;
285 }
286
287 if (likely(!skb)) {
288 skb = netdev_alloc_skb_ip_align(ndev, priv->rx_packet_max);
289 if (WARN_ON(!skb))
290 return;
291
292 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
293 skb_tailroom(skb), GFP_KERNEL);
294 }
295 WARN_ON(ret < 0);
296 }
297
298 static irqreturn_t cpsw_interrupt(int irq, void *dev_id)
299 {
300 struct cpsw_priv *priv = dev_id;
301
302 if (likely(netif_running(priv->ndev))) {
303 cpsw_intr_disable(priv);
304 cpsw_disable_irq(priv);
305 napi_schedule(&priv->napi);
306 }
307 return IRQ_HANDLED;
308 }
309
310 static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
311 {
312 if (priv->host_port == 0)
313 return slave_num + 1;
314 else
315 return slave_num;
316 }
317
318 static int cpsw_poll(struct napi_struct *napi, int budget)
319 {
320 struct cpsw_priv *priv = napi_to_priv(napi);
321 int num_tx, num_rx;
322
323 num_tx = cpdma_chan_process(priv->txch, 128);
324 num_rx = cpdma_chan_process(priv->rxch, budget);
325
326 if (num_rx || num_tx)
327 cpsw_dbg(priv, intr, "poll %d rx, %d tx pkts\n",
328 num_rx, num_tx);
329
330 if (num_rx < budget) {
331 napi_complete(napi);
332 cpsw_intr_enable(priv);
333 cpdma_ctlr_eoi(priv->dma);
334 cpsw_enable_irq(priv);
335 }
336
337 return num_rx;
338 }
339
340 static inline void soft_reset(const char *module, void __iomem *reg)
341 {
342 unsigned long timeout = jiffies + HZ;
343
344 __raw_writel(1, reg);
345 do {
346 cpu_relax();
347 } while ((__raw_readl(reg) & 1) && time_after(timeout, jiffies));
348
349 WARN(__raw_readl(reg) & 1, "failed to soft-reset %s\n", module);
350 }
351
352 #define mac_hi(mac) (((mac)[0] << 0) | ((mac)[1] << 8) | \
353 ((mac)[2] << 16) | ((mac)[3] << 24))
354 #define mac_lo(mac) (((mac)[4] << 0) | ((mac)[5] << 8))
355
356 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
357 struct cpsw_priv *priv)
358 {
359 __raw_writel(mac_hi(priv->mac_addr), &slave->regs->sa_hi);
360 __raw_writel(mac_lo(priv->mac_addr), &slave->regs->sa_lo);
361 }
362
363 static void _cpsw_adjust_link(struct cpsw_slave *slave,
364 struct cpsw_priv *priv, bool *link)
365 {
366 struct phy_device *phy = slave->phy;
367 u32 mac_control = 0;
368 u32 slave_port;
369
370 if (!phy)
371 return;
372
373 slave_port = cpsw_get_slave_port(priv, slave->slave_num);
374
375 if (phy->link) {
376 mac_control = priv->data.mac_control;
377
378 /* enable forwarding */
379 cpsw_ale_control_set(priv->ale, slave_port,
380 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
381
382 if (phy->speed == 1000)
383 mac_control |= BIT(7); /* GIGABITEN */
384 if (phy->duplex)
385 mac_control |= BIT(0); /* FULLDUPLEXEN */
386 *link = true;
387 } else {
388 mac_control = 0;
389 /* disable forwarding */
390 cpsw_ale_control_set(priv->ale, slave_port,
391 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
392 }
393
394 if (mac_control != slave->mac_control) {
395 phy_print_status(phy);
396 __raw_writel(mac_control, &slave->sliver->mac_control);
397 }
398
399 slave->mac_control = mac_control;
400 }
401
402 static void cpsw_adjust_link(struct net_device *ndev)
403 {
404 struct cpsw_priv *priv = netdev_priv(ndev);
405 bool link = false;
406
407 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
408
409 if (link) {
410 netif_carrier_on(ndev);
411 if (netif_running(ndev))
412 netif_wake_queue(ndev);
413 } else {
414 netif_carrier_off(ndev);
415 netif_stop_queue(ndev);
416 }
417 }
418
419 static inline int __show_stat(char *buf, int maxlen, const char *name, u32 val)
420 {
421 static char *leader = "........................................";
422
423 if (!val)
424 return 0;
425 else
426 return snprintf(buf, maxlen, "%s %s %10d\n", name,
427 leader + strlen(name), val);
428 }
429
430 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
431 {
432 char name[32];
433 u32 slave_port;
434
435 sprintf(name, "slave-%d", slave->slave_num);
436
437 soft_reset(name, &slave->sliver->soft_reset);
438
439 /* setup priority mapping */
440 __raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
441 __raw_writel(TX_PRIORITY_MAPPING, &slave->regs->tx_pri_map);
442
443 /* setup max packet size, and mac address */
444 __raw_writel(priv->rx_packet_max, &slave->sliver->rx_maxlen);
445 cpsw_set_slave_mac(slave, priv);
446
447 slave->mac_control = 0; /* no link yet */
448
449 slave_port = cpsw_get_slave_port(priv, slave->slave_num);
450
451 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
452 1 << slave_port, 0, ALE_MCAST_FWD_2);
453
454 slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
455 &cpsw_adjust_link, 0, slave->data->phy_if);
456 if (IS_ERR(slave->phy)) {
457 dev_err(priv->dev, "phy %s not found on slave %d\n",
458 slave->data->phy_id, slave->slave_num);
459 slave->phy = NULL;
460 } else {
461 dev_info(priv->dev, "phy found : id is : 0x%x\n",
462 slave->phy->phy_id);
463 phy_start(slave->phy);
464 }
465 }
466
467 static void cpsw_init_host_port(struct cpsw_priv *priv)
468 {
469 /* soft reset the controller and initialize ale */
470 soft_reset("cpsw", &priv->regs->soft_reset);
471 cpsw_ale_start(priv->ale);
472
473 /* switch to vlan unaware mode */
474 cpsw_ale_control_set(priv->ale, 0, ALE_VLAN_AWARE, 0);
475
476 /* setup host port priority mapping */
477 __raw_writel(CPDMA_TX_PRIORITY_MAP,
478 &priv->host_port_regs->cpdma_tx_pri_map);
479 __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
480
481 cpsw_ale_control_set(priv->ale, priv->host_port,
482 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
483
484 cpsw_ale_add_ucast(priv->ale, priv->mac_addr, priv->host_port, 0);
485 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
486 1 << priv->host_port, 0, ALE_MCAST_FWD_2);
487 }
488
489 static int cpsw_ndo_open(struct net_device *ndev)
490 {
491 struct cpsw_priv *priv = netdev_priv(ndev);
492 int i, ret;
493 u32 reg;
494
495 cpsw_intr_disable(priv);
496 netif_carrier_off(ndev);
497
498 pm_runtime_get_sync(&priv->pdev->dev);
499
500 reg = __raw_readl(&priv->regs->id_ver);
501
502 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
503 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
504 CPSW_RTL_VERSION(reg));
505
506 /* initialize host and slave ports */
507 cpsw_init_host_port(priv);
508 for_each_slave(priv, cpsw_slave_open, priv);
509
510 /* setup tx dma to fixed prio and zero offset */
511 cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
512 cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
513
514 /* disable priority elevation and enable statistics on all ports */
515 __raw_writel(0, &priv->regs->ptype);
516
517 /* enable statistics collection only on the host port */
518 __raw_writel(0x7, &priv->regs->stat_port_en);
519
520 if (WARN_ON(!priv->data.rx_descs))
521 priv->data.rx_descs = 128;
522
523 for (i = 0; i < priv->data.rx_descs; i++) {
524 struct sk_buff *skb;
525
526 ret = -ENOMEM;
527 skb = netdev_alloc_skb_ip_align(priv->ndev,
528 priv->rx_packet_max);
529 if (!skb)
530 break;
531 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
532 skb_tailroom(skb), GFP_KERNEL);
533 if (WARN_ON(ret < 0))
534 break;
535 }
536 /* continue even if we didn't manage to submit all receive descs */
537 cpsw_info(priv, ifup, "submitted %d rx descriptors\n", i);
538
539 cpdma_ctlr_start(priv->dma);
540 cpsw_intr_enable(priv);
541 napi_enable(&priv->napi);
542 cpdma_ctlr_eoi(priv->dma);
543
544 return 0;
545 }
546
547 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
548 {
549 if (!slave->phy)
550 return;
551 phy_stop(slave->phy);
552 phy_disconnect(slave->phy);
553 slave->phy = NULL;
554 }
555
556 static int cpsw_ndo_stop(struct net_device *ndev)
557 {
558 struct cpsw_priv *priv = netdev_priv(ndev);
559
560 cpsw_info(priv, ifdown, "shutting down cpsw device\n");
561 cpsw_intr_disable(priv);
562 cpdma_ctlr_int_ctrl(priv->dma, false);
563 cpdma_ctlr_stop(priv->dma);
564 netif_stop_queue(priv->ndev);
565 napi_disable(&priv->napi);
566 netif_carrier_off(priv->ndev);
567 cpsw_ale_stop(priv->ale);
568 for_each_slave(priv, cpsw_slave_stop, priv);
569 pm_runtime_put_sync(&priv->pdev->dev);
570 return 0;
571 }
572
573 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
574 struct net_device *ndev)
575 {
576 struct cpsw_priv *priv = netdev_priv(ndev);
577 int ret;
578
579 ndev->trans_start = jiffies;
580
581 if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
582 cpsw_err(priv, tx_err, "packet pad failed\n");
583 priv->stats.tx_dropped++;
584 return NETDEV_TX_OK;
585 }
586
587 ret = cpdma_chan_submit(priv->txch, skb, skb->data,
588 skb->len, GFP_KERNEL);
589 if (unlikely(ret != 0)) {
590 cpsw_err(priv, tx_err, "desc submit failed\n");
591 goto fail;
592 }
593
594 return NETDEV_TX_OK;
595 fail:
596 priv->stats.tx_dropped++;
597 netif_stop_queue(ndev);
598 return NETDEV_TX_BUSY;
599 }
600
601 static void cpsw_ndo_change_rx_flags(struct net_device *ndev, int flags)
602 {
603 /*
604 * The switch cannot operate in promiscuous mode without substantial
605 * headache. For promiscuous mode to work, we would need to put the
606 * ALE in bypass mode and route all traffic to the host port.
607 * Subsequently, the host will need to operate as a "bridge", learn,
608 * and flood as needed. For now, we simply complain here and
609 * do nothing about it :-)
610 */
611 if ((flags & IFF_PROMISC) && (ndev->flags & IFF_PROMISC))
612 dev_err(&ndev->dev, "promiscuity ignored!\n");
613
614 /*
615 * The switch cannot filter multicast traffic unless it is configured
616 * in "VLAN Aware" mode. Unfortunately, VLAN awareness requires a
617 * whole bunch of additional logic that this driver does not implement
618 * at present.
619 */
620 if ((flags & IFF_ALLMULTI) && !(ndev->flags & IFF_ALLMULTI))
621 dev_err(&ndev->dev, "multicast traffic cannot be filtered!\n");
622 }
623
624 static void cpsw_ndo_tx_timeout(struct net_device *ndev)
625 {
626 struct cpsw_priv *priv = netdev_priv(ndev);
627
628 cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
629 priv->stats.tx_errors++;
630 cpsw_intr_disable(priv);
631 cpdma_ctlr_int_ctrl(priv->dma, false);
632 cpdma_chan_stop(priv->txch);
633 cpdma_chan_start(priv->txch);
634 cpdma_ctlr_int_ctrl(priv->dma, true);
635 cpsw_intr_enable(priv);
636 cpdma_ctlr_eoi(priv->dma);
637 }
638
639 static struct net_device_stats *cpsw_ndo_get_stats(struct net_device *ndev)
640 {
641 struct cpsw_priv *priv = netdev_priv(ndev);
642 return &priv->stats;
643 }
644
645 #ifdef CONFIG_NET_POLL_CONTROLLER
646 static void cpsw_ndo_poll_controller(struct net_device *ndev)
647 {
648 struct cpsw_priv *priv = netdev_priv(ndev);
649
650 cpsw_intr_disable(priv);
651 cpdma_ctlr_int_ctrl(priv->dma, false);
652 cpsw_interrupt(ndev->irq, priv);
653 cpdma_ctlr_int_ctrl(priv->dma, true);
654 cpsw_intr_enable(priv);
655 cpdma_ctlr_eoi(priv->dma);
656 }
657 #endif
658
659 static const struct net_device_ops cpsw_netdev_ops = {
660 .ndo_open = cpsw_ndo_open,
661 .ndo_stop = cpsw_ndo_stop,
662 .ndo_start_xmit = cpsw_ndo_start_xmit,
663 .ndo_change_rx_flags = cpsw_ndo_change_rx_flags,
664 .ndo_validate_addr = eth_validate_addr,
665 .ndo_change_mtu = eth_change_mtu,
666 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
667 .ndo_get_stats = cpsw_ndo_get_stats,
668 #ifdef CONFIG_NET_POLL_CONTROLLER
669 .ndo_poll_controller = cpsw_ndo_poll_controller,
670 #endif
671 };
672
673 static void cpsw_get_drvinfo(struct net_device *ndev,
674 struct ethtool_drvinfo *info)
675 {
676 struct cpsw_priv *priv = netdev_priv(ndev);
677 strcpy(info->driver, "TI CPSW Driver v1.0");
678 strcpy(info->version, "1.0");
679 strcpy(info->bus_info, priv->pdev->name);
680 }
681
682 static u32 cpsw_get_msglevel(struct net_device *ndev)
683 {
684 struct cpsw_priv *priv = netdev_priv(ndev);
685 return priv->msg_enable;
686 }
687
688 static void cpsw_set_msglevel(struct net_device *ndev, u32 value)
689 {
690 struct cpsw_priv *priv = netdev_priv(ndev);
691 priv->msg_enable = value;
692 }
693
694 static const struct ethtool_ops cpsw_ethtool_ops = {
695 .get_drvinfo = cpsw_get_drvinfo,
696 .get_msglevel = cpsw_get_msglevel,
697 .set_msglevel = cpsw_set_msglevel,
698 .get_link = ethtool_op_get_link,
699 };
700
701 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
702 {
703 void __iomem *regs = priv->regs;
704 int slave_num = slave->slave_num;
705 struct cpsw_slave_data *data = priv->data.slave_data + slave_num;
706
707 slave->data = data;
708 slave->regs = regs + data->slave_reg_ofs;
709 slave->sliver = regs + data->sliver_reg_ofs;
710 }
711
712 static int __devinit cpsw_probe(struct platform_device *pdev)
713 {
714 struct cpsw_platform_data *data = pdev->dev.platform_data;
715 struct net_device *ndev;
716 struct cpsw_priv *priv;
717 struct cpdma_params dma_params;
718 struct cpsw_ale_params ale_params;
719 void __iomem *regs;
720 struct resource *res;
721 int ret = 0, i, k = 0;
722
723 if (!data) {
724 pr_err("platform data missing\n");
725 return -ENODEV;
726 }
727
728 ndev = alloc_etherdev(sizeof(struct cpsw_priv));
729 if (!ndev) {
730 pr_err("error allocating net_device\n");
731 return -ENOMEM;
732 }
733
734 platform_set_drvdata(pdev, ndev);
735 priv = netdev_priv(ndev);
736 spin_lock_init(&priv->lock);
737 priv->data = *data;
738 priv->pdev = pdev;
739 priv->ndev = ndev;
740 priv->dev = &ndev->dev;
741 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
742 priv->rx_packet_max = max(rx_packet_max, 128);
743
744 if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
745 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
746 pr_info("Detected MACID = %pM", priv->mac_addr);
747 } else {
748 eth_random_addr(priv->mac_addr);
749 pr_info("Random MACID = %pM", priv->mac_addr);
750 }
751
752 memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
753
754 priv->slaves = kzalloc(sizeof(struct cpsw_slave) * data->slaves,
755 GFP_KERNEL);
756 if (!priv->slaves) {
757 ret = -EBUSY;
758 goto clean_ndev_ret;
759 }
760 for (i = 0; i < data->slaves; i++)
761 priv->slaves[i].slave_num = i;
762
763 pm_runtime_enable(&pdev->dev);
764 priv->clk = clk_get(&pdev->dev, "fck");
765 if (IS_ERR(priv->clk)) {
766 dev_err(&pdev->dev, "fck is not found\n");
767 ret = -ENODEV;
768 goto clean_slave_ret;
769 }
770
771 priv->cpsw_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
772 if (!priv->cpsw_res) {
773 dev_err(priv->dev, "error getting i/o resource\n");
774 ret = -ENOENT;
775 goto clean_clk_ret;
776 }
777
778 if (!request_mem_region(priv->cpsw_res->start,
779 resource_size(priv->cpsw_res), ndev->name)) {
780 dev_err(priv->dev, "failed request i/o region\n");
781 ret = -ENXIO;
782 goto clean_clk_ret;
783 }
784
785 regs = ioremap(priv->cpsw_res->start, resource_size(priv->cpsw_res));
786 if (!regs) {
787 dev_err(priv->dev, "unable to map i/o region\n");
788 goto clean_cpsw_iores_ret;
789 }
790 priv->regs = regs;
791 priv->host_port = data->host_port_num;
792 priv->host_port_regs = regs + data->host_port_reg_ofs;
793
794 priv->cpsw_ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
795 if (!priv->cpsw_ss_res) {
796 dev_err(priv->dev, "error getting i/o resource\n");
797 ret = -ENOENT;
798 goto clean_clk_ret;
799 }
800
801 if (!request_mem_region(priv->cpsw_ss_res->start,
802 resource_size(priv->cpsw_ss_res), ndev->name)) {
803 dev_err(priv->dev, "failed request i/o region\n");
804 ret = -ENXIO;
805 goto clean_clk_ret;
806 }
807
808 regs = ioremap(priv->cpsw_ss_res->start,
809 resource_size(priv->cpsw_ss_res));
810 if (!regs) {
811 dev_err(priv->dev, "unable to map i/o region\n");
812 goto clean_cpsw_ss_iores_ret;
813 }
814 priv->ss_regs = regs;
815
816 for_each_slave(priv, cpsw_slave_init, priv);
817
818 memset(&dma_params, 0, sizeof(dma_params));
819 dma_params.dev = &pdev->dev;
820 dma_params.dmaregs = cpsw_dma_regs((u32)priv->regs,
821 data->cpdma_reg_ofs);
822 dma_params.rxthresh = cpsw_dma_rxthresh((u32)priv->regs,
823 data->cpdma_reg_ofs);
824 dma_params.rxfree = cpsw_dma_rxfree((u32)priv->regs,
825 data->cpdma_reg_ofs);
826 dma_params.txhdp = cpsw_dma_txhdp((u32)priv->regs,
827 data->cpdma_sram_ofs);
828 dma_params.rxhdp = cpsw_dma_rxhdp((u32)priv->regs,
829 data->cpdma_sram_ofs);
830 dma_params.txcp = cpsw_dma_txcp((u32)priv->regs,
831 data->cpdma_sram_ofs);
832 dma_params.rxcp = cpsw_dma_rxcp((u32)priv->regs,
833 data->cpdma_sram_ofs);
834
835 dma_params.num_chan = data->channels;
836 dma_params.has_soft_reset = true;
837 dma_params.min_packet_size = CPSW_MIN_PACKET_SIZE;
838 dma_params.desc_mem_size = data->bd_ram_size;
839 dma_params.desc_align = 16;
840 dma_params.has_ext_regs = true;
841 dma_params.desc_mem_phys = data->no_bd_ram ? 0 :
842 (u32 __force)priv->cpsw_res->start + data->bd_ram_ofs;
843 dma_params.desc_hw_addr = data->hw_ram_addr ?
844 data->hw_ram_addr : dma_params.desc_mem_phys ;
845
846 priv->dma = cpdma_ctlr_create(&dma_params);
847 if (!priv->dma) {
848 dev_err(priv->dev, "error initializing dma\n");
849 ret = -ENOMEM;
850 goto clean_iomap_ret;
851 }
852
853 priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0),
854 cpsw_tx_handler);
855 priv->rxch = cpdma_chan_create(priv->dma, rx_chan_num(0),
856 cpsw_rx_handler);
857
858 if (WARN_ON(!priv->txch || !priv->rxch)) {
859 dev_err(priv->dev, "error initializing dma channels\n");
860 ret = -ENOMEM;
861 goto clean_dma_ret;
862 }
863
864 memset(&ale_params, 0, sizeof(ale_params));
865 ale_params.dev = &ndev->dev;
866 ale_params.ale_regs = (void *)((u32)priv->regs) +
867 ((u32)data->ale_reg_ofs);
868 ale_params.ale_ageout = ale_ageout;
869 ale_params.ale_entries = data->ale_entries;
870 ale_params.ale_ports = data->slaves;
871
872 priv->ale = cpsw_ale_create(&ale_params);
873 if (!priv->ale) {
874 dev_err(priv->dev, "error initializing ale engine\n");
875 ret = -ENODEV;
876 goto clean_dma_ret;
877 }
878
879 ndev->irq = platform_get_irq(pdev, 0);
880 if (ndev->irq < 0) {
881 dev_err(priv->dev, "error getting irq resource\n");
882 ret = -ENOENT;
883 goto clean_ale_ret;
884 }
885
886 while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
887 for (i = res->start; i <= res->end; i++) {
888 if (request_irq(i, cpsw_interrupt, IRQF_DISABLED,
889 dev_name(&pdev->dev), priv)) {
890 dev_err(priv->dev, "error attaching irq\n");
891 goto clean_ale_ret;
892 }
893 priv->irqs_table[k] = i;
894 priv->num_irqs = k;
895 }
896 k++;
897 }
898
899 ndev->flags |= IFF_ALLMULTI; /* see cpsw_ndo_change_rx_flags() */
900
901 ndev->netdev_ops = &cpsw_netdev_ops;
902 SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
903 netif_napi_add(ndev, &priv->napi, cpsw_poll, CPSW_POLL_WEIGHT);
904
905 /* register the network device */
906 SET_NETDEV_DEV(ndev, &pdev->dev);
907 ret = register_netdev(ndev);
908 if (ret) {
909 dev_err(priv->dev, "error registering net device\n");
910 ret = -ENODEV;
911 goto clean_irq_ret;
912 }
913
914 cpsw_notice(priv, probe, "initialized device (regs %x, irq %d)\n",
915 priv->cpsw_res->start, ndev->irq);
916
917 return 0;
918
919 clean_irq_ret:
920 free_irq(ndev->irq, priv);
921 clean_ale_ret:
922 cpsw_ale_destroy(priv->ale);
923 clean_dma_ret:
924 cpdma_chan_destroy(priv->txch);
925 cpdma_chan_destroy(priv->rxch);
926 cpdma_ctlr_destroy(priv->dma);
927 clean_iomap_ret:
928 iounmap(priv->regs);
929 clean_cpsw_ss_iores_ret:
930 release_mem_region(priv->cpsw_ss_res->start,
931 resource_size(priv->cpsw_ss_res));
932 clean_cpsw_iores_ret:
933 release_mem_region(priv->cpsw_res->start,
934 resource_size(priv->cpsw_res));
935 clean_clk_ret:
936 clk_put(priv->clk);
937 clean_slave_ret:
938 pm_runtime_disable(&pdev->dev);
939 kfree(priv->slaves);
940 clean_ndev_ret:
941 free_netdev(ndev);
942 return ret;
943 }
944
945 static int __devexit cpsw_remove(struct platform_device *pdev)
946 {
947 struct net_device *ndev = platform_get_drvdata(pdev);
948 struct cpsw_priv *priv = netdev_priv(ndev);
949
950 pr_info("removing device");
951 platform_set_drvdata(pdev, NULL);
952
953 free_irq(ndev->irq, priv);
954 cpsw_ale_destroy(priv->ale);
955 cpdma_chan_destroy(priv->txch);
956 cpdma_chan_destroy(priv->rxch);
957 cpdma_ctlr_destroy(priv->dma);
958 iounmap(priv->regs);
959 release_mem_region(priv->cpsw_res->start,
960 resource_size(priv->cpsw_res));
961 release_mem_region(priv->cpsw_ss_res->start,
962 resource_size(priv->cpsw_ss_res));
963 pm_runtime_disable(&pdev->dev);
964 clk_put(priv->clk);
965 kfree(priv->slaves);
966 free_netdev(ndev);
967
968 return 0;
969 }
970
971 static int cpsw_suspend(struct device *dev)
972 {
973 struct platform_device *pdev = to_platform_device(dev);
974 struct net_device *ndev = platform_get_drvdata(pdev);
975
976 if (netif_running(ndev))
977 cpsw_ndo_stop(ndev);
978 pm_runtime_put_sync(&pdev->dev);
979
980 return 0;
981 }
982
983 static int cpsw_resume(struct device *dev)
984 {
985 struct platform_device *pdev = to_platform_device(dev);
986 struct net_device *ndev = platform_get_drvdata(pdev);
987
988 pm_runtime_get_sync(&pdev->dev);
989 if (netif_running(ndev))
990 cpsw_ndo_open(ndev);
991 return 0;
992 }
993
994 static const struct dev_pm_ops cpsw_pm_ops = {
995 .suspend = cpsw_suspend,
996 .resume = cpsw_resume,
997 };
998
999 static struct platform_driver cpsw_driver = {
1000 .driver = {
1001 .name = "cpsw",
1002 .owner = THIS_MODULE,
1003 .pm = &cpsw_pm_ops,
1004 },
1005 .probe = cpsw_probe,
1006 .remove = __devexit_p(cpsw_remove),
1007 };
1008
1009 static int __init cpsw_init(void)
1010 {
1011 return platform_driver_register(&cpsw_driver);
1012 }
1013 late_initcall(cpsw_init);
1014
1015 static void __exit cpsw_exit(void)
1016 {
1017 platform_driver_unregister(&cpsw_driver);
1018 }
1019 module_exit(cpsw_exit);
1020
1021 MODULE_LICENSE("GPL");
1022 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1023 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1024 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
Linux kernel - Deliverables
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