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net: ethernet: cpsw: fix erroneous condition in error check
[linux/fpc-iii.git] / drivers / net / ethernet / ti / cpsw.c
blobdf32a090d08e0c96841a9958b1c1319eb6cbbc19
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/net_tstamp.h>
28 #include <linux/phy.h>
29 #include <linux/workqueue.h>
30 #include <linux/delay.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/of.h>
33 #include <linux/of_net.h>
34 #include <linux/of_device.h>
35 #include <linux/if_vlan.h>
36
37 #include <linux/platform_data/cpsw.h>
38
39 #include "cpsw_ale.h"
40 #include "cpts.h"
41 #include "davinci_cpdma.h"
42
43 #define CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
44 NETIF_MSG_DRV | NETIF_MSG_LINK | \
45 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
46 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
47 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
48 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
49 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
50 NETIF_MSG_RX_STATUS)
51
52 #define cpsw_info(priv, type, format, ...) \
53 do { \
54 if (netif_msg_##type(priv) && net_ratelimit()) \
55 dev_info(priv->dev, format, ## __VA_ARGS__); \
56 } while (0)
57
58 #define cpsw_err(priv, type, format, ...) \
59 do { \
60 if (netif_msg_##type(priv) && net_ratelimit()) \
61 dev_err(priv->dev, format, ## __VA_ARGS__); \
62 } while (0)
63
64 #define cpsw_dbg(priv, type, format, ...) \
65 do { \
66 if (netif_msg_##type(priv) && net_ratelimit()) \
67 dev_dbg(priv->dev, format, ## __VA_ARGS__); \
68 } while (0)
69
70 #define cpsw_notice(priv, type, format, ...) \
71 do { \
72 if (netif_msg_##type(priv) && net_ratelimit()) \
73 dev_notice(priv->dev, format, ## __VA_ARGS__); \
74 } while (0)
75
76 #define ALE_ALL_PORTS 0x7
77
78 #define CPSW_MAJOR_VERSION(reg) (reg >> 8 & 0x7)
79 #define CPSW_MINOR_VERSION(reg) (reg & 0xff)
80 #define CPSW_RTL_VERSION(reg) ((reg >> 11) & 0x1f)
81
82 #define CPSW_VERSION_1 0x19010a
83 #define CPSW_VERSION_2 0x19010c
84
85 #define HOST_PORT_NUM 0
86 #define SLIVER_SIZE 0x40
87
88 #define CPSW1_HOST_PORT_OFFSET 0x028
89 #define CPSW1_SLAVE_OFFSET 0x050
90 #define CPSW1_SLAVE_SIZE 0x040
91 #define CPSW1_CPDMA_OFFSET 0x100
92 #define CPSW1_STATERAM_OFFSET 0x200
93 #define CPSW1_CPTS_OFFSET 0x500
94 #define CPSW1_ALE_OFFSET 0x600
95 #define CPSW1_SLIVER_OFFSET 0x700
96
97 #define CPSW2_HOST_PORT_OFFSET 0x108
98 #define CPSW2_SLAVE_OFFSET 0x200
99 #define CPSW2_SLAVE_SIZE 0x100
100 #define CPSW2_CPDMA_OFFSET 0x800
101 #define CPSW2_STATERAM_OFFSET 0xa00
102 #define CPSW2_CPTS_OFFSET 0xc00
103 #define CPSW2_ALE_OFFSET 0xd00
104 #define CPSW2_SLIVER_OFFSET 0xd80
105 #define CPSW2_BD_OFFSET 0x2000
106
107 #define CPDMA_RXTHRESH 0x0c0
108 #define CPDMA_RXFREE 0x0e0
109 #define CPDMA_TXHDP 0x00
110 #define CPDMA_RXHDP 0x20
111 #define CPDMA_TXCP 0x40
112 #define CPDMA_RXCP 0x60
113
114 #define CPSW_POLL_WEIGHT 64
115 #define CPSW_MIN_PACKET_SIZE 60
116 #define CPSW_MAX_PACKET_SIZE (1500 + 14 + 4 + 4)
117
118 #define RX_PRIORITY_MAPPING 0x76543210
119 #define TX_PRIORITY_MAPPING 0x33221100
120 #define CPDMA_TX_PRIORITY_MAP 0x76543210
121
122 #define CPSW_VLAN_AWARE BIT(1)
123 #define CPSW_ALE_VLAN_AWARE 1
124
125 #define CPSW_FIFO_NORMAL_MODE (0 << 15)
126 #define CPSW_FIFO_DUAL_MAC_MODE (1 << 15)
127 #define CPSW_FIFO_RATE_LIMIT_MODE (2 << 15)
128
129 #define cpsw_enable_irq(priv) \
130 do { \
131 u32 i; \
132 for (i = 0; i < priv->num_irqs; i++) \
133 enable_irq(priv->irqs_table[i]); \
134 } while (0);
135 #define cpsw_disable_irq(priv) \
136 do { \
137 u32 i; \
138 for (i = 0; i < priv->num_irqs; i++) \
139 disable_irq_nosync(priv->irqs_table[i]); \
140 } while (0);
141
142 static int debug_level;
143 module_param(debug_level, int, 0);
144 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
145
146 static int ale_ageout = 10;
147 module_param(ale_ageout, int, 0);
148 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
149
150 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
151 module_param(rx_packet_max, int, 0);
152 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
153
154 struct cpsw_wr_regs {
155 u32 id_ver;
156 u32 soft_reset;
157 u32 control;
158 u32 int_control;
159 u32 rx_thresh_en;
160 u32 rx_en;
161 u32 tx_en;
162 u32 misc_en;
163 };
164
165 struct cpsw_ss_regs {
166 u32 id_ver;
167 u32 control;
168 u32 soft_reset;
169 u32 stat_port_en;
170 u32 ptype;
171 u32 soft_idle;
172 u32 thru_rate;
173 u32 gap_thresh;
174 u32 tx_start_wds;
175 u32 flow_control;
176 u32 vlan_ltype;
177 u32 ts_ltype;
178 u32 dlr_ltype;
179 };
180
181 /* CPSW_PORT_V1 */
182 #define CPSW1_MAX_BLKS 0x00 /* Maximum FIFO Blocks */
183 #define CPSW1_BLK_CNT 0x04 /* FIFO Block Usage Count (Read Only) */
184 #define CPSW1_TX_IN_CTL 0x08 /* Transmit FIFO Control */
185 #define CPSW1_PORT_VLAN 0x0c /* VLAN Register */
186 #define CPSW1_TX_PRI_MAP 0x10 /* Tx Header Priority to Switch Pri Mapping */
187 #define CPSW1_TS_CTL 0x14 /* Time Sync Control */
188 #define CPSW1_TS_SEQ_LTYPE 0x18 /* Time Sync Sequence ID Offset and Msg Type */
189 #define CPSW1_TS_VLAN 0x1c /* Time Sync VLAN1 and VLAN2 */
190
191 /* CPSW_PORT_V2 */
192 #define CPSW2_CONTROL 0x00 /* Control Register */
193 #define CPSW2_MAX_BLKS 0x08 /* Maximum FIFO Blocks */
194 #define CPSW2_BLK_CNT 0x0c /* FIFO Block Usage Count (Read Only) */
195 #define CPSW2_TX_IN_CTL 0x10 /* Transmit FIFO Control */
196 #define CPSW2_PORT_VLAN 0x14 /* VLAN Register */
197 #define CPSW2_TX_PRI_MAP 0x18 /* Tx Header Priority to Switch Pri Mapping */
198 #define CPSW2_TS_SEQ_MTYPE 0x1c /* Time Sync Sequence ID Offset and Msg Type */
199
200 /* CPSW_PORT_V1 and V2 */
201 #define SA_LO 0x20 /* CPGMAC_SL Source Address Low */
202 #define SA_HI 0x24 /* CPGMAC_SL Source Address High */
203 #define SEND_PERCENT 0x28 /* Transmit Queue Send Percentages */
204
205 /* CPSW_PORT_V2 only */
206 #define RX_DSCP_PRI_MAP0 0x30 /* Rx DSCP Priority to Rx Packet Mapping */
207 #define RX_DSCP_PRI_MAP1 0x34 /* Rx DSCP Priority to Rx Packet Mapping */
208 #define RX_DSCP_PRI_MAP2 0x38 /* Rx DSCP Priority to Rx Packet Mapping */
209 #define RX_DSCP_PRI_MAP3 0x3c /* Rx DSCP Priority to Rx Packet Mapping */
210 #define RX_DSCP_PRI_MAP4 0x40 /* Rx DSCP Priority to Rx Packet Mapping */
211 #define RX_DSCP_PRI_MAP5 0x44 /* Rx DSCP Priority to Rx Packet Mapping */
212 #define RX_DSCP_PRI_MAP6 0x48 /* Rx DSCP Priority to Rx Packet Mapping */
213 #define RX_DSCP_PRI_MAP7 0x4c /* Rx DSCP Priority to Rx Packet Mapping */
214
215 /* Bit definitions for the CPSW2_CONTROL register */
216 #define PASS_PRI_TAGGED (1<<24) /* Pass Priority Tagged */
217 #define VLAN_LTYPE2_EN (1<<21) /* VLAN LTYPE 2 enable */
218 #define VLAN_LTYPE1_EN (1<<20) /* VLAN LTYPE 1 enable */
219 #define DSCP_PRI_EN (1<<16) /* DSCP Priority Enable */
220 #define TS_320 (1<<14) /* Time Sync Dest Port 320 enable */
221 #define TS_319 (1<<13) /* Time Sync Dest Port 319 enable */
222 #define TS_132 (1<<12) /* Time Sync Dest IP Addr 132 enable */
223 #define TS_131 (1<<11) /* Time Sync Dest IP Addr 131 enable */
224 #define TS_130 (1<<10) /* Time Sync Dest IP Addr 130 enable */
225 #define TS_129 (1<<9) /* Time Sync Dest IP Addr 129 enable */
226 #define TS_BIT8 (1<<8) /* ts_ttl_nonzero? */
227 #define TS_ANNEX_D_EN (1<<4) /* Time Sync Annex D enable */
228 #define TS_LTYPE2_EN (1<<3) /* Time Sync LTYPE 2 enable */
229 #define TS_LTYPE1_EN (1<<2) /* Time Sync LTYPE 1 enable */
230 #define TS_TX_EN (1<<1) /* Time Sync Transmit Enable */
231 #define TS_RX_EN (1<<0) /* Time Sync Receive Enable */
232
233 #define CTRL_TS_BITS \
234 (TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 | TS_BIT8 | \
235 TS_ANNEX_D_EN | TS_LTYPE1_EN)
236
237 #define CTRL_ALL_TS_MASK (CTRL_TS_BITS | TS_TX_EN | TS_RX_EN)
238 #define CTRL_TX_TS_BITS (CTRL_TS_BITS | TS_TX_EN)
239 #define CTRL_RX_TS_BITS (CTRL_TS_BITS | TS_RX_EN)
240
241 /* Bit definitions for the CPSW2_TS_SEQ_MTYPE register */
242 #define TS_SEQ_ID_OFFSET_SHIFT (16) /* Time Sync Sequence ID Offset */
243 #define TS_SEQ_ID_OFFSET_MASK (0x3f)
244 #define TS_MSG_TYPE_EN_SHIFT (0) /* Time Sync Message Type Enable */
245 #define TS_MSG_TYPE_EN_MASK (0xffff)
246
247 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
248 #define EVENT_MSG_BITS ((1<<0) | (1<<1) | (1<<2) | (1<<3))
249
250 /* Bit definitions for the CPSW1_TS_CTL register */
251 #define CPSW_V1_TS_RX_EN BIT(0)
252 #define CPSW_V1_TS_TX_EN BIT(4)
253 #define CPSW_V1_MSG_TYPE_OFS 16
254
255 /* Bit definitions for the CPSW1_TS_SEQ_LTYPE register */
256 #define CPSW_V1_SEQ_ID_OFS_SHIFT 16
257
258 struct cpsw_host_regs {
259 u32 max_blks;
260 u32 blk_cnt;
261 u32 tx_in_ctl;
262 u32 port_vlan;
263 u32 tx_pri_map;
264 u32 cpdma_tx_pri_map;
265 u32 cpdma_rx_chan_map;
266 };
267
268 struct cpsw_sliver_regs {
269 u32 id_ver;
270 u32 mac_control;
271 u32 mac_status;
272 u32 soft_reset;
273 u32 rx_maxlen;
274 u32 __reserved_0;
275 u32 rx_pause;
276 u32 tx_pause;
277 u32 __reserved_1;
278 u32 rx_pri_map;
279 };
280
281 struct cpsw_slave {
282 void __iomem *regs;
283 struct cpsw_sliver_regs __iomem *sliver;
284 int slave_num;
285 u32 mac_control;
286 struct cpsw_slave_data *data;
287 struct phy_device *phy;
288 struct net_device *ndev;
289 u32 port_vlan;
290 u32 open_stat;
291 };
292
293 static inline u32 slave_read(struct cpsw_slave *slave, u32 offset)
294 {
295 return __raw_readl(slave->regs + offset);
296 }
297
298 static inline void slave_write(struct cpsw_slave *slave, u32 val, u32 offset)
299 {
300 __raw_writel(val, slave->regs + offset);
301 }
302
303 struct cpsw_priv {
304 spinlock_t lock;
305 struct platform_device *pdev;
306 struct net_device *ndev;
307 struct resource *cpsw_res;
308 struct resource *cpsw_wr_res;
309 struct napi_struct napi;
310 struct device *dev;
311 struct cpsw_platform_data data;
312 struct cpsw_ss_regs __iomem *regs;
313 struct cpsw_wr_regs __iomem *wr_regs;
314 struct cpsw_host_regs __iomem *host_port_regs;
315 u32 msg_enable;
316 u32 version;
317 struct net_device_stats stats;
318 int rx_packet_max;
319 int host_port;
320 struct clk *clk;
321 u8 mac_addr[ETH_ALEN];
322 struct cpsw_slave *slaves;
323 struct cpdma_ctlr *dma;
324 struct cpdma_chan *txch, *rxch;
325 struct cpsw_ale *ale;
326 /* snapshot of IRQ numbers */
327 u32 irqs_table[4];
328 u32 num_irqs;
329 struct cpts *cpts;
330 u32 emac_port;
331 };
332
333 #define napi_to_priv(napi) container_of(napi, struct cpsw_priv, napi)
334 #define for_each_slave(priv, func, arg...) \
335 do { \
336 int idx; \
337 if (priv->data.dual_emac) \
338 (func)((priv)->slaves + priv->emac_port, ##arg);\
339 else \
340 for (idx = 0; idx < (priv)->data.slaves; idx++) \
341 (func)((priv)->slaves + idx, ##arg); \
342 } while (0)
343 #define cpsw_get_slave_ndev(priv, __slave_no__) \
344 (priv->slaves[__slave_no__].ndev)
345 #define cpsw_get_slave_priv(priv, __slave_no__) \
346 ((priv->slaves[__slave_no__].ndev) ? \
347 netdev_priv(priv->slaves[__slave_no__].ndev) : NULL) \
348
349 #define cpsw_dual_emac_src_port_detect(status, priv, ndev, skb) \
350 do { \
351 if (!priv->data.dual_emac) \
352 break; \
353 if (CPDMA_RX_SOURCE_PORT(status) == 1) { \
354 ndev = cpsw_get_slave_ndev(priv, 0); \
355 priv = netdev_priv(ndev); \
356 skb->dev = ndev; \
357 } else if (CPDMA_RX_SOURCE_PORT(status) == 2) { \
358 ndev = cpsw_get_slave_ndev(priv, 1); \
359 priv = netdev_priv(ndev); \
360 skb->dev = ndev; \
361 } \
362 } while (0)
363 #define cpsw_add_mcast(priv, addr) \
364 do { \
365 if (priv->data.dual_emac) { \
366 struct cpsw_slave *slave = priv->slaves + \
367 priv->emac_port; \
368 int slave_port = cpsw_get_slave_port(priv, \
369 slave->slave_num); \
370 cpsw_ale_add_mcast(priv->ale, addr, \
371 1 << slave_port | 1 << priv->host_port, \
372 ALE_VLAN, slave->port_vlan, 0); \
373 } else { \
374 cpsw_ale_add_mcast(priv->ale, addr, \
375 ALE_ALL_PORTS << priv->host_port, \
376 0, 0, 0); \
377 } \
378 } while (0)
379
380 static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
381 {
382 if (priv->host_port == 0)
383 return slave_num + 1;
384 else
385 return slave_num;
386 }
387
388 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
389 {
390 struct cpsw_priv *priv = netdev_priv(ndev);
391
392 if (ndev->flags & IFF_PROMISC) {
393 /* Enable promiscuous mode */
394 dev_err(priv->dev, "Ignoring Promiscuous mode\n");
395 return;
396 }
397
398 /* Clear all mcast from ALE */
399 cpsw_ale_flush_multicast(priv->ale, ALE_ALL_PORTS << priv->host_port);
400
401 if (!netdev_mc_empty(ndev)) {
402 struct netdev_hw_addr *ha;
403
404 /* program multicast address list into ALE register */
405 netdev_for_each_mc_addr(ha, ndev) {
406 cpsw_add_mcast(priv, (u8 *)ha->addr);
407 }
408 }
409 }
410
411 static void cpsw_intr_enable(struct cpsw_priv *priv)
412 {
413 __raw_writel(0xFF, &priv->wr_regs->tx_en);
414 __raw_writel(0xFF, &priv->wr_regs->rx_en);
415
416 cpdma_ctlr_int_ctrl(priv->dma, true);
417 return;
418 }
419
420 static void cpsw_intr_disable(struct cpsw_priv *priv)
421 {
422 __raw_writel(0, &priv->wr_regs->tx_en);
423 __raw_writel(0, &priv->wr_regs->rx_en);
424
425 cpdma_ctlr_int_ctrl(priv->dma, false);
426 return;
427 }
428
429 void cpsw_tx_handler(void *token, int len, int status)
430 {
431 struct sk_buff *skb = token;
432 struct net_device *ndev = skb->dev;
433 struct cpsw_priv *priv = netdev_priv(ndev);
434
435 /* Check whether the queue is stopped due to stalled tx dma, if the
436 * queue is stopped then start the queue as we have free desc for tx
437 */
438 if (unlikely(netif_queue_stopped(ndev)))
439 netif_start_queue(ndev);
440 cpts_tx_timestamp(priv->cpts, skb);
441 priv->stats.tx_packets++;
442 priv->stats.tx_bytes += len;
443 dev_kfree_skb_any(skb);
444 }
445
446 void cpsw_rx_handler(void *token, int len, int status)
447 {
448 struct sk_buff *skb = token;
449 struct net_device *ndev = skb->dev;
450 struct cpsw_priv *priv = netdev_priv(ndev);
451 int ret = 0;
452
453 cpsw_dual_emac_src_port_detect(status, priv, ndev, skb);
454
455 /* free and bail if we are shutting down */
456 if (unlikely(!netif_running(ndev)) ||
457 unlikely(!netif_carrier_ok(ndev))) {
458 dev_kfree_skb_any(skb);
459 return;
460 }
461 if (likely(status >= 0)) {
462 skb_put(skb, len);
463 cpts_rx_timestamp(priv->cpts, skb);
464 skb->protocol = eth_type_trans(skb, ndev);
465 netif_receive_skb(skb);
466 priv->stats.rx_bytes += len;
467 priv->stats.rx_packets++;
468 skb = NULL;
469 }
470
471 if (unlikely(!netif_running(ndev))) {
472 if (skb)
473 dev_kfree_skb_any(skb);
474 return;
475 }
476
477 if (likely(!skb)) {
478 skb = netdev_alloc_skb_ip_align(ndev, priv->rx_packet_max);
479 if (WARN_ON(!skb))
480 return;
481
482 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
483 skb_tailroom(skb), 0, GFP_KERNEL);
484 }
485 WARN_ON(ret < 0);
486 }
487
488 static irqreturn_t cpsw_interrupt(int irq, void *dev_id)
489 {
490 struct cpsw_priv *priv = dev_id;
491
492 if (likely(netif_running(priv->ndev))) {
493 cpsw_intr_disable(priv);
494 cpsw_disable_irq(priv);
495 napi_schedule(&priv->napi);
496 } else {
497 priv = cpsw_get_slave_priv(priv, 1);
498 if (likely(priv) && likely(netif_running(priv->ndev))) {
499 cpsw_intr_disable(priv);
500 cpsw_disable_irq(priv);
501 napi_schedule(&priv->napi);
502 }
503 }
504 return IRQ_HANDLED;
505 }
506
507 static int cpsw_poll(struct napi_struct *napi, int budget)
508 {
509 struct cpsw_priv *priv = napi_to_priv(napi);
510 int num_tx, num_rx;
511
512 num_tx = cpdma_chan_process(priv->txch, 128);
513 if (num_tx)
514 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
515
516 num_rx = cpdma_chan_process(priv->rxch, budget);
517 if (num_rx < budget) {
518 napi_complete(napi);
519 cpsw_intr_enable(priv);
520 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
521 cpsw_enable_irq(priv);
522 }
523
524 if (num_rx || num_tx)
525 cpsw_dbg(priv, intr, "poll %d rx, %d tx pkts\n",
526 num_rx, num_tx);
527
528 return num_rx;
529 }
530
531 static inline void soft_reset(const char *module, void __iomem *reg)
532 {
533 unsigned long timeout = jiffies + HZ;
534
535 __raw_writel(1, reg);
536 do {
537 cpu_relax();
538 } while ((__raw_readl(reg) & 1) && time_after(timeout, jiffies));
539
540 WARN(__raw_readl(reg) & 1, "failed to soft-reset %s\n", module);
541 }
542
543 #define mac_hi(mac) (((mac)[0] << 0) | ((mac)[1] << 8) | \
544 ((mac)[2] << 16) | ((mac)[3] << 24))
545 #define mac_lo(mac) (((mac)[4] << 0) | ((mac)[5] << 8))
546
547 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
548 struct cpsw_priv *priv)
549 {
550 slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
551 slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
552 }
553
554 static void _cpsw_adjust_link(struct cpsw_slave *slave,
555 struct cpsw_priv *priv, bool *link)
556 {
557 struct phy_device *phy = slave->phy;
558 u32 mac_control = 0;
559 u32 slave_port;
560
561 if (!phy)
562 return;
563
564 slave_port = cpsw_get_slave_port(priv, slave->slave_num);
565
566 if (phy->link) {
567 mac_control = priv->data.mac_control;
568
569 /* enable forwarding */
570 cpsw_ale_control_set(priv->ale, slave_port,
571 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
572
573 if (phy->speed == 1000)
574 mac_control |= BIT(7); /* GIGABITEN */
575 if (phy->duplex)
576 mac_control |= BIT(0); /* FULLDUPLEXEN */
577
578 /* set speed_in input in case RMII mode is used in 100Mbps */
579 if (phy->speed == 100)
580 mac_control |= BIT(15);
581
582 *link = true;
583 } else {
584 mac_control = 0;
585 /* disable forwarding */
586 cpsw_ale_control_set(priv->ale, slave_port,
587 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
588 }
589
590 if (mac_control != slave->mac_control) {
591 phy_print_status(phy);
592 __raw_writel(mac_control, &slave->sliver->mac_control);
593 }
594
595 slave->mac_control = mac_control;
596 }
597
598 static void cpsw_adjust_link(struct net_device *ndev)
599 {
600 struct cpsw_priv *priv = netdev_priv(ndev);
601 bool link = false;
602
603 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
604
605 if (link) {
606 netif_carrier_on(ndev);
607 if (netif_running(ndev))
608 netif_wake_queue(ndev);
609 } else {
610 netif_carrier_off(ndev);
611 netif_stop_queue(ndev);
612 }
613 }
614
615 static inline int __show_stat(char *buf, int maxlen, const char *name, u32 val)
616 {
617 static char *leader = "........................................";
618
619 if (!val)
620 return 0;
621 else
622 return snprintf(buf, maxlen, "%s %s %10d\n", name,
623 leader + strlen(name), val);
624 }
625
626 static int cpsw_common_res_usage_state(struct cpsw_priv *priv)
627 {
628 u32 i;
629 u32 usage_count = 0;
630
631 if (!priv->data.dual_emac)
632 return 0;
633
634 for (i = 0; i < priv->data.slaves; i++)
635 if (priv->slaves[i].open_stat)
636 usage_count++;
637
638 return usage_count;
639 }
640
641 static inline int cpsw_tx_packet_submit(struct net_device *ndev,
642 struct cpsw_priv *priv, struct sk_buff *skb)
643 {
644 if (!priv->data.dual_emac)
645 return cpdma_chan_submit(priv->txch, skb, skb->data,
646 skb->len, 0, GFP_KERNEL);
647
648 if (ndev == cpsw_get_slave_ndev(priv, 0))
649 return cpdma_chan_submit(priv->txch, skb, skb->data,
650 skb->len, 1, GFP_KERNEL);
651 else
652 return cpdma_chan_submit(priv->txch, skb, skb->data,
653 skb->len, 2, GFP_KERNEL);
654 }
655
656 static inline void cpsw_add_dual_emac_def_ale_entries(
657 struct cpsw_priv *priv, struct cpsw_slave *slave,
658 u32 slave_port)
659 {
660 u32 port_mask = 1 << slave_port | 1 << priv->host_port;
661
662 if (priv->version == CPSW_VERSION_1)
663 slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
664 else
665 slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
666 cpsw_ale_add_vlan(priv->ale, slave->port_vlan, port_mask,
667 port_mask, port_mask, 0);
668 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
669 port_mask, ALE_VLAN, slave->port_vlan, 0);
670 cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
671 priv->host_port, ALE_VLAN, slave->port_vlan);
672 }
673
674 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
675 {
676 char name[32];
677 u32 slave_port;
678
679 sprintf(name, "slave-%d", slave->slave_num);
680
681 soft_reset(name, &slave->sliver->soft_reset);
682
683 /* setup priority mapping */
684 __raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
685
686 switch (priv->version) {
687 case CPSW_VERSION_1:
688 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
689 break;
690 case CPSW_VERSION_2:
691 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
692 break;
693 }
694
695 /* setup max packet size, and mac address */
696 __raw_writel(priv->rx_packet_max, &slave->sliver->rx_maxlen);
697 cpsw_set_slave_mac(slave, priv);
698
699 slave->mac_control = 0; /* no link yet */
700
701 slave_port = cpsw_get_slave_port(priv, slave->slave_num);
702
703 if (priv->data.dual_emac)
704 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
705 else
706 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
707 1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
708
709 slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
710 &cpsw_adjust_link, slave->data->phy_if);
711 if (IS_ERR(slave->phy)) {
712 dev_err(priv->dev, "phy %s not found on slave %d\n",
713 slave->data->phy_id, slave->slave_num);
714 slave->phy = NULL;
715 } else {
716 dev_info(priv->dev, "phy found : id is : 0x%x\n",
717 slave->phy->phy_id);
718 phy_start(slave->phy);
719 }
720 }
721
722 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
723 {
724 const int vlan = priv->data.default_vlan;
725 const int port = priv->host_port;
726 u32 reg;
727 int i;
728
729 reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
730 CPSW2_PORT_VLAN;
731
732 writel(vlan, &priv->host_port_regs->port_vlan);
733
734 for (i = 0; i < priv->data.slaves; i++)
735 slave_write(priv->slaves + i, vlan, reg);
736
737 cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,
738 ALE_ALL_PORTS << port, ALE_ALL_PORTS << port,
739 (ALE_PORT_1 | ALE_PORT_2) << port);
740 }
741
742 static void cpsw_init_host_port(struct cpsw_priv *priv)
743 {
744 u32 control_reg;
745 u32 fifo_mode;
746
747 /* soft reset the controller and initialize ale */
748 soft_reset("cpsw", &priv->regs->soft_reset);
749 cpsw_ale_start(priv->ale);
750
751 /* switch to vlan unaware mode */
752 cpsw_ale_control_set(priv->ale, priv->host_port, ALE_VLAN_AWARE,
753 CPSW_ALE_VLAN_AWARE);
754 control_reg = readl(&priv->regs->control);
755 control_reg |= CPSW_VLAN_AWARE;
756 writel(control_reg, &priv->regs->control);
757 fifo_mode = (priv->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
758 CPSW_FIFO_NORMAL_MODE;
759 writel(fifo_mode, &priv->host_port_regs->tx_in_ctl);
760
761 /* setup host port priority mapping */
762 __raw_writel(CPDMA_TX_PRIORITY_MAP,
763 &priv->host_port_regs->cpdma_tx_pri_map);
764 __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
765
766 cpsw_ale_control_set(priv->ale, priv->host_port,
767 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
768
769 if (!priv->data.dual_emac) {
770 cpsw_ale_add_ucast(priv->ale, priv->mac_addr, priv->host_port,
771 0, 0);
772 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
773 1 << priv->host_port, 0, 0, ALE_MCAST_FWD_2);
774 }
775 }
776
777 static int cpsw_ndo_open(struct net_device *ndev)
778 {
779 struct cpsw_priv *priv = netdev_priv(ndev);
780 int i, ret;
781 u32 reg;
782
783 if (!cpsw_common_res_usage_state(priv))
784 cpsw_intr_disable(priv);
785 netif_carrier_off(ndev);
786
787 pm_runtime_get_sync(&priv->pdev->dev);
788
789 reg = priv->version;
790
791 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
792 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
793 CPSW_RTL_VERSION(reg));
794
795 /* initialize host and slave ports */
796 if (!cpsw_common_res_usage_state(priv))
797 cpsw_init_host_port(priv);
798 for_each_slave(priv, cpsw_slave_open, priv);
799
800 /* Add default VLAN */
801 if (!priv->data.dual_emac)
802 cpsw_add_default_vlan(priv);
803
804 if (!cpsw_common_res_usage_state(priv)) {
805 /* setup tx dma to fixed prio and zero offset */
806 cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
807 cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
808
809 /* disable priority elevation */
810 __raw_writel(0, &priv->regs->ptype);
811
812 /* enable statistics collection only on all ports */
813 __raw_writel(0x7, &priv->regs->stat_port_en);
814
815 if (WARN_ON(!priv->data.rx_descs))
816 priv->data.rx_descs = 128;
817
818 for (i = 0; i < priv->data.rx_descs; i++) {
819 struct sk_buff *skb;
820
821 ret = -ENOMEM;
822 skb = netdev_alloc_skb_ip_align(priv->ndev,
823 priv->rx_packet_max);
824 if (!skb)
825 break;
826 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
827 skb_tailroom(skb), 0, GFP_KERNEL);
828 if (WARN_ON(ret < 0))
829 break;
830 }
831 /* continue even if we didn't manage to submit all
832 * receive descs
833 */
834 cpsw_info(priv, ifup, "submitted %d rx descriptors\n", i);
835 }
836
837 cpdma_ctlr_start(priv->dma);
838 cpsw_intr_enable(priv);
839 napi_enable(&priv->napi);
840 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
841 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
842
843 if (priv->data.dual_emac)
844 priv->slaves[priv->emac_port].open_stat = true;
845 return 0;
846 }
847
848 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
849 {
850 if (!slave->phy)
851 return;
852 phy_stop(slave->phy);
853 phy_disconnect(slave->phy);
854 slave->phy = NULL;
855 }
856
857 static int cpsw_ndo_stop(struct net_device *ndev)
858 {
859 struct cpsw_priv *priv = netdev_priv(ndev);
860
861 cpsw_info(priv, ifdown, "shutting down cpsw device\n");
862 netif_stop_queue(priv->ndev);
863 napi_disable(&priv->napi);
864 netif_carrier_off(priv->ndev);
865
866 if (cpsw_common_res_usage_state(priv) <= 1) {
867 cpsw_intr_disable(priv);
868 cpdma_ctlr_int_ctrl(priv->dma, false);
869 cpdma_ctlr_stop(priv->dma);
870 cpsw_ale_stop(priv->ale);
871 }
872 for_each_slave(priv, cpsw_slave_stop, priv);
873 pm_runtime_put_sync(&priv->pdev->dev);
874 if (priv->data.dual_emac)
875 priv->slaves[priv->emac_port].open_stat = false;
876 return 0;
877 }
878
879 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
880 struct net_device *ndev)
881 {
882 struct cpsw_priv *priv = netdev_priv(ndev);
883 int ret;
884
885 ndev->trans_start = jiffies;
886
887 if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
888 cpsw_err(priv, tx_err, "packet pad failed\n");
889 priv->stats.tx_dropped++;
890 return NETDEV_TX_OK;
891 }
892
893 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
894 priv->cpts->tx_enable)
895 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
896
897 skb_tx_timestamp(skb);
898
899 ret = cpsw_tx_packet_submit(ndev, priv, skb);
900 if (unlikely(ret != 0)) {
901 cpsw_err(priv, tx_err, "desc submit failed\n");
902 goto fail;
903 }
904
905 /* If there is no more tx desc left free then we need to
906 * tell the kernel to stop sending us tx frames.
907 */
908 if (unlikely(!cpdma_check_free_tx_desc(priv->txch)))
909 netif_stop_queue(ndev);
910
911 return NETDEV_TX_OK;
912 fail:
913 priv->stats.tx_dropped++;
914 netif_stop_queue(ndev);
915 return NETDEV_TX_BUSY;
916 }
917
918 static void cpsw_ndo_change_rx_flags(struct net_device *ndev, int flags)
919 {
920 /*
921 * The switch cannot operate in promiscuous mode without substantial
922 * headache. For promiscuous mode to work, we would need to put the
923 * ALE in bypass mode and route all traffic to the host port.
924 * Subsequently, the host will need to operate as a "bridge", learn,
925 * and flood as needed. For now, we simply complain here and
926 * do nothing about it :-)
927 */
928 if ((flags & IFF_PROMISC) && (ndev->flags & IFF_PROMISC))
929 dev_err(&ndev->dev, "promiscuity ignored!\n");
930
931 /*
932 * The switch cannot filter multicast traffic unless it is configured
933 * in "VLAN Aware" mode. Unfortunately, VLAN awareness requires a
934 * whole bunch of additional logic that this driver does not implement
935 * at present.
936 */
937 if ((flags & IFF_ALLMULTI) && !(ndev->flags & IFF_ALLMULTI))
938 dev_err(&ndev->dev, "multicast traffic cannot be filtered!\n");
939 }
940
941 #ifdef CONFIG_TI_CPTS
942
943 static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
944 {
945 struct cpsw_slave *slave = &priv->slaves[priv->data.cpts_active_slave];
946 u32 ts_en, seq_id;
947
948 if (!priv->cpts->tx_enable && !priv->cpts->rx_enable) {
949 slave_write(slave, 0, CPSW1_TS_CTL);
950 return;
951 }
952
953 seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
954 ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
955
956 if (priv->cpts->tx_enable)
957 ts_en |= CPSW_V1_TS_TX_EN;
958
959 if (priv->cpts->rx_enable)
960 ts_en |= CPSW_V1_TS_RX_EN;
961
962 slave_write(slave, ts_en, CPSW1_TS_CTL);
963 slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
964 }
965
966 static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
967 {
968 struct cpsw_slave *slave;
969 u32 ctrl, mtype;
970
971 if (priv->data.dual_emac)
972 slave = &priv->slaves[priv->emac_port];
973 else
974 slave = &priv->slaves[priv->data.cpts_active_slave];
975
976 ctrl = slave_read(slave, CPSW2_CONTROL);
977 ctrl &= ~CTRL_ALL_TS_MASK;
978
979 if (priv->cpts->tx_enable)
980 ctrl |= CTRL_TX_TS_BITS;
981
982 if (priv->cpts->rx_enable)
983 ctrl |= CTRL_RX_TS_BITS;
984
985 mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
986
987 slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
988 slave_write(slave, ctrl, CPSW2_CONTROL);
989 __raw_writel(ETH_P_1588, &priv->regs->ts_ltype);
990 }
991
992 static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
993 {
994 struct cpsw_priv *priv = netdev_priv(dev);
995 struct cpts *cpts = priv->cpts;
996 struct hwtstamp_config cfg;
997
998 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
999 return -EFAULT;
1000
1001 /* reserved for future extensions */
1002 if (cfg.flags)
1003 return -EINVAL;
1004
1005 switch (cfg.tx_type) {
1006 case HWTSTAMP_TX_OFF:
1007 cpts->tx_enable = 0;
1008 break;
1009 case HWTSTAMP_TX_ON:
1010 cpts->tx_enable = 1;
1011 break;
1012 default:
1013 return -ERANGE;
1014 }
1015
1016 switch (cfg.rx_filter) {
1017 case HWTSTAMP_FILTER_NONE:
1018 cpts->rx_enable = 0;
1019 break;
1020 case HWTSTAMP_FILTER_ALL:
1021 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1022 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1023 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1024 return -ERANGE;
1025 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1026 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1027 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1028 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1029 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1030 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1031 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1032 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1033 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1034 cpts->rx_enable = 1;
1035 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
1036 break;
1037 default:
1038 return -ERANGE;
1039 }
1040
1041 switch (priv->version) {
1042 case CPSW_VERSION_1:
1043 cpsw_hwtstamp_v1(priv);
1044 break;
1045 case CPSW_VERSION_2:
1046 cpsw_hwtstamp_v2(priv);
1047 break;
1048 default:
1049 return -ENOTSUPP;
1050 }
1051
1052 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1053 }
1054
1055 #endif /*CONFIG_TI_CPTS*/
1056
1057 static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
1058 {
1059 if (!netif_running(dev))
1060 return -EINVAL;
1061
1062 #ifdef CONFIG_TI_CPTS
1063 if (cmd == SIOCSHWTSTAMP)
1064 return cpsw_hwtstamp_ioctl(dev, req);
1065 #endif
1066 return -ENOTSUPP;
1067 }
1068
1069 static void cpsw_ndo_tx_timeout(struct net_device *ndev)
1070 {
1071 struct cpsw_priv *priv = netdev_priv(ndev);
1072
1073 cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
1074 priv->stats.tx_errors++;
1075 cpsw_intr_disable(priv);
1076 cpdma_ctlr_int_ctrl(priv->dma, false);
1077 cpdma_chan_stop(priv->txch);
1078 cpdma_chan_start(priv->txch);
1079 cpdma_ctlr_int_ctrl(priv->dma, true);
1080 cpsw_intr_enable(priv);
1081 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
1082 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
1083
1084 }
1085
1086 static struct net_device_stats *cpsw_ndo_get_stats(struct net_device *ndev)
1087 {
1088 struct cpsw_priv *priv = netdev_priv(ndev);
1089 return &priv->stats;
1090 }
1091
1092 #ifdef CONFIG_NET_POLL_CONTROLLER
1093 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1094 {
1095 struct cpsw_priv *priv = netdev_priv(ndev);
1096
1097 cpsw_intr_disable(priv);
1098 cpdma_ctlr_int_ctrl(priv->dma, false);
1099 cpsw_interrupt(ndev->irq, priv);
1100 cpdma_ctlr_int_ctrl(priv->dma, true);
1101 cpsw_intr_enable(priv);
1102 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
1103 cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
1104
1105 }
1106 #endif
1107
1108 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1109 unsigned short vid)
1110 {
1111 int ret;
1112
1113 ret = cpsw_ale_add_vlan(priv->ale, vid,
1114 ALE_ALL_PORTS << priv->host_port,
1115 0, ALE_ALL_PORTS << priv->host_port,
1116 (ALE_PORT_1 | ALE_PORT_2) << priv->host_port);
1117 if (ret != 0)
1118 return ret;
1119
1120 ret = cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
1121 priv->host_port, ALE_VLAN, vid);
1122 if (ret != 0)
1123 goto clean_vid;
1124
1125 ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1126 ALE_ALL_PORTS << priv->host_port,
1127 ALE_VLAN, vid, 0);
1128 if (ret != 0)
1129 goto clean_vlan_ucast;
1130 return 0;
1131
1132 clean_vlan_ucast:
1133 cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1134 priv->host_port, ALE_VLAN, vid);
1135 clean_vid:
1136 cpsw_ale_del_vlan(priv->ale, vid, 0);
1137 return ret;
1138 }
1139
1140 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1141 unsigned short vid)
1142 {
1143 struct cpsw_priv *priv = netdev_priv(ndev);
1144
1145 if (vid == priv->data.default_vlan)
1146 return 0;
1147
1148 dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1149 return cpsw_add_vlan_ale_entry(priv, vid);
1150 }
1151
1152 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1153 unsigned short vid)
1154 {
1155 struct cpsw_priv *priv = netdev_priv(ndev);
1156 int ret;
1157
1158 if (vid == priv->data.default_vlan)
1159 return 0;
1160
1161 dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1162 ret = cpsw_ale_del_vlan(priv->ale, vid, 0);
1163 if (ret != 0)
1164 return ret;
1165
1166 ret = cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1167 priv->host_port, ALE_VLAN, vid);
1168 if (ret != 0)
1169 return ret;
1170
1171 return cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
1172 0, ALE_VLAN, vid);
1173 }
1174
1175 static const struct net_device_ops cpsw_netdev_ops = {
1176 .ndo_open = cpsw_ndo_open,
1177 .ndo_stop = cpsw_ndo_stop,
1178 .ndo_start_xmit = cpsw_ndo_start_xmit,
1179 .ndo_change_rx_flags = cpsw_ndo_change_rx_flags,
1180 .ndo_do_ioctl = cpsw_ndo_ioctl,
1181 .ndo_validate_addr = eth_validate_addr,
1182 .ndo_change_mtu = eth_change_mtu,
1183 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1184 .ndo_get_stats = cpsw_ndo_get_stats,
1185 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1186 #ifdef CONFIG_NET_POLL_CONTROLLER
1187 .ndo_poll_controller = cpsw_ndo_poll_controller,
1188 #endif
1189 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1190 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1191 };
1192
1193 static void cpsw_get_drvinfo(struct net_device *ndev,
1194 struct ethtool_drvinfo *info)
1195 {
1196 struct cpsw_priv *priv = netdev_priv(ndev);
1197
1198 strlcpy(info->driver, "TI CPSW Driver v1.0", sizeof(info->driver));
1199 strlcpy(info->version, "1.0", sizeof(info->version));
1200 strlcpy(info->bus_info, priv->pdev->name, sizeof(info->bus_info));
1201 }
1202
1203 static u32 cpsw_get_msglevel(struct net_device *ndev)
1204 {
1205 struct cpsw_priv *priv = netdev_priv(ndev);
1206 return priv->msg_enable;
1207 }
1208
1209 static void cpsw_set_msglevel(struct net_device *ndev, u32 value)
1210 {
1211 struct cpsw_priv *priv = netdev_priv(ndev);
1212 priv->msg_enable = value;
1213 }
1214
1215 static int cpsw_get_ts_info(struct net_device *ndev,
1216 struct ethtool_ts_info *info)
1217 {
1218 #ifdef CONFIG_TI_CPTS
1219 struct cpsw_priv *priv = netdev_priv(ndev);
1220
1221 info->so_timestamping =
1222 SOF_TIMESTAMPING_TX_HARDWARE |
1223 SOF_TIMESTAMPING_TX_SOFTWARE |
1224 SOF_TIMESTAMPING_RX_HARDWARE |
1225 SOF_TIMESTAMPING_RX_SOFTWARE |
1226 SOF_TIMESTAMPING_SOFTWARE |
1227 SOF_TIMESTAMPING_RAW_HARDWARE;
1228 info->phc_index = priv->cpts->phc_index;
1229 info->tx_types =
1230 (1 << HWTSTAMP_TX_OFF) |
1231 (1 << HWTSTAMP_TX_ON);
1232 info->rx_filters =
1233 (1 << HWTSTAMP_FILTER_NONE) |
1234 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1235 #else
1236 info->so_timestamping =
1237 SOF_TIMESTAMPING_TX_SOFTWARE |
1238 SOF_TIMESTAMPING_RX_SOFTWARE |
1239 SOF_TIMESTAMPING_SOFTWARE;
1240 info->phc_index = -1;
1241 info->tx_types = 0;
1242 info->rx_filters = 0;
1243 #endif
1244 return 0;
1245 }
1246
1247 static const struct ethtool_ops cpsw_ethtool_ops = {
1248 .get_drvinfo = cpsw_get_drvinfo,
1249 .get_msglevel = cpsw_get_msglevel,
1250 .set_msglevel = cpsw_set_msglevel,
1251 .get_link = ethtool_op_get_link,
1252 .get_ts_info = cpsw_get_ts_info,
1253 };
1254
1255 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
1256 u32 slave_reg_ofs, u32 sliver_reg_ofs)
1257 {
1258 void __iomem *regs = priv->regs;
1259 int slave_num = slave->slave_num;
1260 struct cpsw_slave_data *data = priv->data.slave_data + slave_num;
1261
1262 slave->data = data;
1263 slave->regs = regs + slave_reg_ofs;
1264 slave->sliver = regs + sliver_reg_ofs;
1265 slave->port_vlan = data->dual_emac_res_vlan;
1266 }
1267
1268 static int cpsw_probe_dt(struct cpsw_platform_data *data,
1269 struct platform_device *pdev)
1270 {
1271 struct device_node *node = pdev->dev.of_node;
1272 struct device_node *slave_node;
1273 int i = 0, ret;
1274 u32 prop;
1275
1276 if (!node)
1277 return -EINVAL;
1278
1279 if (of_property_read_u32(node, "slaves", &prop)) {
1280 pr_err("Missing slaves property in the DT.\n");
1281 return -EINVAL;
1282 }
1283 data->slaves = prop;
1284
1285 if (of_property_read_u32(node, "cpts_active_slave", &prop)) {
1286 pr_err("Missing cpts_active_slave property in the DT.\n");
1287 ret = -EINVAL;
1288 goto error_ret;
1289 }
1290 data->cpts_active_slave = prop;
1291
1292 if (of_property_read_u32(node, "cpts_clock_mult", &prop)) {
1293 pr_err("Missing cpts_clock_mult property in the DT.\n");
1294 ret = -EINVAL;
1295 goto error_ret;
1296 }
1297 data->cpts_clock_mult = prop;
1298
1299 if (of_property_read_u32(node, "cpts_clock_shift", &prop)) {
1300 pr_err("Missing cpts_clock_shift property in the DT.\n");
1301 ret = -EINVAL;
1302 goto error_ret;
1303 }
1304 data->cpts_clock_shift = prop;
1305
1306 data->slave_data = kcalloc(data->slaves, sizeof(struct cpsw_slave_data),
1307 GFP_KERNEL);
1308 if (!data->slave_data)
1309 return -EINVAL;
1310
1311 if (of_property_read_u32(node, "cpdma_channels", &prop)) {
1312 pr_err("Missing cpdma_channels property in the DT.\n");
1313 ret = -EINVAL;
1314 goto error_ret;
1315 }
1316 data->channels = prop;
1317
1318 if (of_property_read_u32(node, "ale_entries", &prop)) {
1319 pr_err("Missing ale_entries property in the DT.\n");
1320 ret = -EINVAL;
1321 goto error_ret;
1322 }
1323 data->ale_entries = prop;
1324
1325 if (of_property_read_u32(node, "bd_ram_size", &prop)) {
1326 pr_err("Missing bd_ram_size property in the DT.\n");
1327 ret = -EINVAL;
1328 goto error_ret;
1329 }
1330 data->bd_ram_size = prop;
1331
1332 if (of_property_read_u32(node, "rx_descs", &prop)) {
1333 pr_err("Missing rx_descs property in the DT.\n");
1334 ret = -EINVAL;
1335 goto error_ret;
1336 }
1337 data->rx_descs = prop;
1338
1339 if (of_property_read_u32(node, "mac_control", &prop)) {
1340 pr_err("Missing mac_control property in the DT.\n");
1341 ret = -EINVAL;
1342 goto error_ret;
1343 }
1344 data->mac_control = prop;
1345
1346 if (!of_property_read_u32(node, "dual_emac", &prop))
1347 data->dual_emac = prop;
1348
1349 /*
1350 * Populate all the child nodes here...
1351 */
1352 ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
1353 /* We do not want to force this, as in some cases may not have child */
1354 if (ret)
1355 pr_warn("Doesn't have any child node\n");
1356
1357 for_each_node_by_name(slave_node, "slave") {
1358 struct cpsw_slave_data *slave_data = data->slave_data + i;
1359 const void *mac_addr = NULL;
1360 u32 phyid;
1361 int lenp;
1362 const __be32 *parp;
1363 struct device_node *mdio_node;
1364 struct platform_device *mdio;
1365
1366 parp = of_get_property(slave_node, "phy_id", &lenp);
1367 if ((parp == NULL) || (lenp != (sizeof(void *) * 2))) {
1368 pr_err("Missing slave[%d] phy_id property\n", i);
1369 ret = -EINVAL;
1370 goto error_ret;
1371 }
1372 mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
1373 phyid = be32_to_cpup(parp+1);
1374 mdio = of_find_device_by_node(mdio_node);
1375 snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
1376 PHY_ID_FMT, mdio->name, phyid);
1377
1378 mac_addr = of_get_mac_address(slave_node);
1379 if (mac_addr)
1380 memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
1381
1382 if (data->dual_emac) {
1383 if (of_property_read_u32(node, "dual_emac_res_vlan",
1384 &prop)) {
1385 pr_err("Missing dual_emac_res_vlan in DT.\n");
1386 slave_data->dual_emac_res_vlan = i+1;
1387 pr_err("Using %d as Reserved VLAN for %d slave\n",
1388 slave_data->dual_emac_res_vlan, i);
1389 } else {
1390 slave_data->dual_emac_res_vlan = prop;
1391 }
1392 }
1393
1394 i++;
1395 }
1396
1397 return 0;
1398
1399 error_ret:
1400 kfree(data->slave_data);
1401 return ret;
1402 }
1403
1404 static int cpsw_probe_dual_emac(struct platform_device *pdev,
1405 struct cpsw_priv *priv)
1406 {
1407 struct cpsw_platform_data *data = &priv->data;
1408 struct net_device *ndev;
1409 struct cpsw_priv *priv_sl2;
1410 int ret = 0, i;
1411
1412 ndev = alloc_etherdev(sizeof(struct cpsw_priv));
1413 if (!ndev) {
1414 pr_err("cpsw: error allocating net_device\n");
1415 return -ENOMEM;
1416 }
1417
1418 priv_sl2 = netdev_priv(ndev);
1419 spin_lock_init(&priv_sl2->lock);
1420 priv_sl2->data = *data;
1421 priv_sl2->pdev = pdev;
1422 priv_sl2->ndev = ndev;
1423 priv_sl2->dev = &ndev->dev;
1424 priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1425 priv_sl2->rx_packet_max = max(rx_packet_max, 128);
1426
1427 if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
1428 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
1429 ETH_ALEN);
1430 pr_info("cpsw: Detected MACID = %pM\n", priv_sl2->mac_addr);
1431 } else {
1432 random_ether_addr(priv_sl2->mac_addr);
1433 pr_info("cpsw: Random MACID = %pM\n", priv_sl2->mac_addr);
1434 }
1435 memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
1436
1437 priv_sl2->slaves = priv->slaves;
1438 priv_sl2->clk = priv->clk;
1439
1440 priv_sl2->cpsw_res = priv->cpsw_res;
1441 priv_sl2->regs = priv->regs;
1442 priv_sl2->host_port = priv->host_port;
1443 priv_sl2->host_port_regs = priv->host_port_regs;
1444 priv_sl2->wr_regs = priv->wr_regs;
1445 priv_sl2->dma = priv->dma;
1446 priv_sl2->txch = priv->txch;
1447 priv_sl2->rxch = priv->rxch;
1448 priv_sl2->ale = priv->ale;
1449 priv_sl2->emac_port = 1;
1450 priv->slaves[1].ndev = ndev;
1451 priv_sl2->cpts = priv->cpts;
1452 priv_sl2->version = priv->version;
1453
1454 for (i = 0; i < priv->num_irqs; i++) {
1455 priv_sl2->irqs_table[i] = priv->irqs_table[i];
1456 priv_sl2->num_irqs = priv->num_irqs;
1457 }
1458
1459 ndev->features |= NETIF_F_HW_VLAN_FILTER;
1460
1461 ndev->netdev_ops = &cpsw_netdev_ops;
1462 SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
1463 netif_napi_add(ndev, &priv_sl2->napi, cpsw_poll, CPSW_POLL_WEIGHT);
1464
1465 /* register the network device */
1466 SET_NETDEV_DEV(ndev, &pdev->dev);
1467 ret = register_netdev(ndev);
1468 if (ret) {
1469 pr_err("cpsw: error registering net device\n");
1470 free_netdev(ndev);
1471 ret = -ENODEV;
1472 }
1473
1474 return ret;
1475 }
1476
1477 static int cpsw_probe(struct platform_device *pdev)
1478 {
1479 struct cpsw_platform_data *data = pdev->dev.platform_data;
1480 struct net_device *ndev;
1481 struct cpsw_priv *priv;
1482 struct cpdma_params dma_params;
1483 struct cpsw_ale_params ale_params;
1484 void __iomem *ss_regs, *wr_regs;
1485 struct resource *res;
1486 u32 slave_offset, sliver_offset, slave_size;
1487 int ret = 0, i, k = 0;
1488
1489 ndev = alloc_etherdev(sizeof(struct cpsw_priv));
1490 if (!ndev) {
1491 pr_err("error allocating net_device\n");
1492 return -ENOMEM;
1493 }
1494
1495 platform_set_drvdata(pdev, ndev);
1496 priv = netdev_priv(ndev);
1497 spin_lock_init(&priv->lock);
1498 priv->pdev = pdev;
1499 priv->ndev = ndev;
1500 priv->dev = &ndev->dev;
1501 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1502 priv->rx_packet_max = max(rx_packet_max, 128);
1503 priv->cpts = devm_kzalloc(&pdev->dev, sizeof(struct cpts), GFP_KERNEL);
1504 if (!ndev) {
1505 pr_err("error allocating cpts\n");
1506 goto clean_ndev_ret;
1507 }
1508
1509 /*
1510 * This may be required here for child devices.
1511 */
1512 pm_runtime_enable(&pdev->dev);
1513
1514 if (cpsw_probe_dt(&priv->data, pdev)) {
1515 pr_err("cpsw: platform data missing\n");
1516 ret = -ENODEV;
1517 goto clean_ndev_ret;
1518 }
1519 data = &priv->data;
1520
1521 if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
1522 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
1523 pr_info("Detected MACID = %pM", priv->mac_addr);
1524 } else {
1525 eth_random_addr(priv->mac_addr);
1526 pr_info("Random MACID = %pM", priv->mac_addr);
1527 }
1528
1529 memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
1530
1531 priv->slaves = kzalloc(sizeof(struct cpsw_slave) * data->slaves,
1532 GFP_KERNEL);
1533 if (!priv->slaves) {
1534 ret = -EBUSY;
1535 goto clean_ndev_ret;
1536 }
1537 for (i = 0; i < data->slaves; i++)
1538 priv->slaves[i].slave_num = i;
1539
1540 priv->slaves[0].ndev = ndev;
1541 priv->emac_port = 0;
1542
1543 priv->clk = clk_get(&pdev->dev, "fck");
1544 if (IS_ERR(priv->clk)) {
1545 dev_err(&pdev->dev, "fck is not found\n");
1546 ret = -ENODEV;
1547 goto clean_slave_ret;
1548 }
1549
1550 priv->cpsw_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1551 if (!priv->cpsw_res) {
1552 dev_err(priv->dev, "error getting i/o resource\n");
1553 ret = -ENOENT;
1554 goto clean_clk_ret;
1555 }
1556 if (!request_mem_region(priv->cpsw_res->start,
1557 resource_size(priv->cpsw_res), ndev->name)) {
1558 dev_err(priv->dev, "failed request i/o region\n");
1559 ret = -ENXIO;
1560 goto clean_clk_ret;
1561 }
1562 ss_regs = ioremap(priv->cpsw_res->start, resource_size(priv->cpsw_res));
1563 if (!ss_regs) {
1564 dev_err(priv->dev, "unable to map i/o region\n");
1565 goto clean_cpsw_iores_ret;
1566 }
1567 priv->regs = ss_regs;
1568 priv->version = __raw_readl(&priv->regs->id_ver);
1569 priv->host_port = HOST_PORT_NUM;
1570
1571 priv->cpsw_wr_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1572 if (!priv->cpsw_wr_res) {
1573 dev_err(priv->dev, "error getting i/o resource\n");
1574 ret = -ENOENT;
1575 goto clean_iomap_ret;
1576 }
1577 if (!request_mem_region(priv->cpsw_wr_res->start,
1578 resource_size(priv->cpsw_wr_res), ndev->name)) {
1579 dev_err(priv->dev, "failed request i/o region\n");
1580 ret = -ENXIO;
1581 goto clean_iomap_ret;
1582 }
1583 wr_regs = ioremap(priv->cpsw_wr_res->start,
1584 resource_size(priv->cpsw_wr_res));
1585 if (!wr_regs) {
1586 dev_err(priv->dev, "unable to map i/o region\n");
1587 goto clean_cpsw_wr_iores_ret;
1588 }
1589 priv->wr_regs = wr_regs;
1590
1591 memset(&dma_params, 0, sizeof(dma_params));
1592 memset(&ale_params, 0, sizeof(ale_params));
1593
1594 switch (priv->version) {
1595 case CPSW_VERSION_1:
1596 priv->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
1597 priv->cpts->reg = ss_regs + CPSW1_CPTS_OFFSET;
1598 dma_params.dmaregs = ss_regs + CPSW1_CPDMA_OFFSET;
1599 dma_params.txhdp = ss_regs + CPSW1_STATERAM_OFFSET;
1600 ale_params.ale_regs = ss_regs + CPSW1_ALE_OFFSET;
1601 slave_offset = CPSW1_SLAVE_OFFSET;
1602 slave_size = CPSW1_SLAVE_SIZE;
1603 sliver_offset = CPSW1_SLIVER_OFFSET;
1604 dma_params.desc_mem_phys = 0;
1605 break;
1606 case CPSW_VERSION_2:
1607 priv->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
1608 priv->cpts->reg = ss_regs + CPSW2_CPTS_OFFSET;
1609 dma_params.dmaregs = ss_regs + CPSW2_CPDMA_OFFSET;
1610 dma_params.txhdp = ss_regs + CPSW2_STATERAM_OFFSET;
1611 ale_params.ale_regs = ss_regs + CPSW2_ALE_OFFSET;
1612 slave_offset = CPSW2_SLAVE_OFFSET;
1613 slave_size = CPSW2_SLAVE_SIZE;
1614 sliver_offset = CPSW2_SLIVER_OFFSET;
1615 dma_params.desc_mem_phys =
1616 (u32 __force) priv->cpsw_res->start + CPSW2_BD_OFFSET;
1617 break;
1618 default:
1619 dev_err(priv->dev, "unknown version 0x%08x\n", priv->version);
1620 ret = -ENODEV;
1621 goto clean_cpsw_wr_iores_ret;
1622 }
1623 for (i = 0; i < priv->data.slaves; i++) {
1624 struct cpsw_slave *slave = &priv->slaves[i];
1625 cpsw_slave_init(slave, priv, slave_offset, sliver_offset);
1626 slave_offset += slave_size;
1627 sliver_offset += SLIVER_SIZE;
1628 }
1629
1630 dma_params.dev = &pdev->dev;
1631 dma_params.rxthresh = dma_params.dmaregs + CPDMA_RXTHRESH;
1632 dma_params.rxfree = dma_params.dmaregs + CPDMA_RXFREE;
1633 dma_params.rxhdp = dma_params.txhdp + CPDMA_RXHDP;
1634 dma_params.txcp = dma_params.txhdp + CPDMA_TXCP;
1635 dma_params.rxcp = dma_params.txhdp + CPDMA_RXCP;
1636
1637 dma_params.num_chan = data->channels;
1638 dma_params.has_soft_reset = true;
1639 dma_params.min_packet_size = CPSW_MIN_PACKET_SIZE;
1640 dma_params.desc_mem_size = data->bd_ram_size;
1641 dma_params.desc_align = 16;
1642 dma_params.has_ext_regs = true;
1643 dma_params.desc_hw_addr = dma_params.desc_mem_phys;
1644
1645 priv->dma = cpdma_ctlr_create(&dma_params);
1646 if (!priv->dma) {
1647 dev_err(priv->dev, "error initializing dma\n");
1648 ret = -ENOMEM;
1649 goto clean_wr_iomap_ret;
1650 }
1651
1652 priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0),
1653 cpsw_tx_handler);
1654 priv->rxch = cpdma_chan_create(priv->dma, rx_chan_num(0),
1655 cpsw_rx_handler);
1656
1657 if (WARN_ON(!priv->txch || !priv->rxch)) {
1658 dev_err(priv->dev, "error initializing dma channels\n");
1659 ret = -ENOMEM;
1660 goto clean_dma_ret;
1661 }
1662
1663 ale_params.dev = &ndev->dev;
1664 ale_params.ale_ageout = ale_ageout;
1665 ale_params.ale_entries = data->ale_entries;
1666 ale_params.ale_ports = data->slaves;
1667
1668 priv->ale = cpsw_ale_create(&ale_params);
1669 if (!priv->ale) {
1670 dev_err(priv->dev, "error initializing ale engine\n");
1671 ret = -ENODEV;
1672 goto clean_dma_ret;
1673 }
1674
1675 ndev->irq = platform_get_irq(pdev, 0);
1676 if (ndev->irq < 0) {
1677 dev_err(priv->dev, "error getting irq resource\n");
1678 ret = -ENOENT;
1679 goto clean_ale_ret;
1680 }
1681
1682 while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
1683 for (i = res->start; i <= res->end; i++) {
1684 if (request_irq(i, cpsw_interrupt, IRQF_DISABLED,
1685 dev_name(&pdev->dev), priv)) {
1686 dev_err(priv->dev, "error attaching irq\n");
1687 goto clean_ale_ret;
1688 }
1689 priv->irqs_table[k] = i;
1690 priv->num_irqs = k;
1691 }
1692 k++;
1693 }
1694
1695 ndev->features |= NETIF_F_HW_VLAN_FILTER;
1696
1697 ndev->netdev_ops = &cpsw_netdev_ops;
1698 SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
1699 netif_napi_add(ndev, &priv->napi, cpsw_poll, CPSW_POLL_WEIGHT);
1700
1701 /* register the network device */
1702 SET_NETDEV_DEV(ndev, &pdev->dev);
1703 ret = register_netdev(ndev);
1704 if (ret) {
1705 dev_err(priv->dev, "error registering net device\n");
1706 ret = -ENODEV;
1707 goto clean_irq_ret;
1708 }
1709
1710 if (cpts_register(&pdev->dev, priv->cpts,
1711 data->cpts_clock_mult, data->cpts_clock_shift))
1712 dev_err(priv->dev, "error registering cpts device\n");
1713
1714 cpsw_notice(priv, probe, "initialized device (regs %x, irq %d)\n",
1715 priv->cpsw_res->start, ndev->irq);
1716
1717 if (priv->data.dual_emac) {
1718 ret = cpsw_probe_dual_emac(pdev, priv);
1719 if (ret) {
1720 cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
1721 goto clean_irq_ret;
1722 }
1723 }
1724
1725 return 0;
1726
1727 clean_irq_ret:
1728 free_irq(ndev->irq, priv);
1729 clean_ale_ret:
1730 cpsw_ale_destroy(priv->ale);
1731 clean_dma_ret:
1732 cpdma_chan_destroy(priv->txch);
1733 cpdma_chan_destroy(priv->rxch);
1734 cpdma_ctlr_destroy(priv->dma);
1735 clean_wr_iomap_ret:
1736 iounmap(priv->wr_regs);
1737 clean_cpsw_wr_iores_ret:
1738 release_mem_region(priv->cpsw_wr_res->start,
1739 resource_size(priv->cpsw_wr_res));
1740 clean_iomap_ret:
1741 iounmap(priv->regs);
1742 clean_cpsw_iores_ret:
1743 release_mem_region(priv->cpsw_res->start,
1744 resource_size(priv->cpsw_res));
1745 clean_clk_ret:
1746 clk_put(priv->clk);
1747 clean_slave_ret:
1748 pm_runtime_disable(&pdev->dev);
1749 kfree(priv->slaves);
1750 clean_ndev_ret:
1751 free_netdev(ndev);
1752 return ret;
1753 }
1754
1755 static int cpsw_remove(struct platform_device *pdev)
1756 {
1757 struct net_device *ndev = platform_get_drvdata(pdev);
1758 struct cpsw_priv *priv = netdev_priv(ndev);
1759
1760 pr_info("removing device");
1761 platform_set_drvdata(pdev, NULL);
1762
1763 cpts_unregister(priv->cpts);
1764 free_irq(ndev->irq, priv);
1765 cpsw_ale_destroy(priv->ale);
1766 cpdma_chan_destroy(priv->txch);
1767 cpdma_chan_destroy(priv->rxch);
1768 cpdma_ctlr_destroy(priv->dma);
1769 iounmap(priv->regs);
1770 release_mem_region(priv->cpsw_res->start,
1771 resource_size(priv->cpsw_res));
1772 iounmap(priv->wr_regs);
1773 release_mem_region(priv->cpsw_wr_res->start,
1774 resource_size(priv->cpsw_wr_res));
1775 pm_runtime_disable(&pdev->dev);
1776 clk_put(priv->clk);
1777 kfree(priv->slaves);
1778 free_netdev(ndev);
1779
1780 return 0;
1781 }
1782
1783 static int cpsw_suspend(struct device *dev)
1784 {
1785 struct platform_device *pdev = to_platform_device(dev);
1786 struct net_device *ndev = platform_get_drvdata(pdev);
1787
1788 if (netif_running(ndev))
1789 cpsw_ndo_stop(ndev);
1790 pm_runtime_put_sync(&pdev->dev);
1791
1792 return 0;
1793 }
1794
1795 static int cpsw_resume(struct device *dev)
1796 {
1797 struct platform_device *pdev = to_platform_device(dev);
1798 struct net_device *ndev = platform_get_drvdata(pdev);
1799
1800 pm_runtime_get_sync(&pdev->dev);
1801 if (netif_running(ndev))
1802 cpsw_ndo_open(ndev);
1803 return 0;
1804 }
1805
1806 static const struct dev_pm_ops cpsw_pm_ops = {
1807 .suspend = cpsw_suspend,
1808 .resume = cpsw_resume,
1809 };
1810
1811 static const struct of_device_id cpsw_of_mtable[] = {
1812 { .compatible = "ti,cpsw", },
1813 { /* sentinel */ },
1814 };
1815
1816 static struct platform_driver cpsw_driver = {
1817 .driver = {
1818 .name = "cpsw",
1819 .owner = THIS_MODULE,
1820 .pm = &cpsw_pm_ops,
1821 .of_match_table = of_match_ptr(cpsw_of_mtable),
1822 },
1823 .probe = cpsw_probe,
1824 .remove = cpsw_remove,
1825 };
1826
1827 static int __init cpsw_init(void)
1828 {
1829 return platform_driver_register(&cpsw_driver);
1830 }
1831 late_initcall(cpsw_init);
1832
1833 static void __exit cpsw_exit(void)
1834 {
1835 platform_driver_unregister(&cpsw_driver);
1836 }
1837 module_exit(cpsw_exit);
1838
1839 MODULE_LICENSE("GPL");
1840 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1841 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1842 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
Linux with added FPC-III support