projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: cpsw: header, Add missing include
[deliverable/linux.git] / drivers / net / ethernet / ti / cpmac.c
CommitLineData
d95b39c3
MC		 1/*
2 * Copyright (C) 2006, 2007 Eugene Konev
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include <linux/module.h>
539d3ee6 20#include <linux/interrupt.h>
d95b39c3
MC		 21#include <linux/moduleparam.h>
22
23#include <linux/sched.h>
24#include <linux/kernel.h>
25#include <linux/slab.h>
26#include <linux/errno.h>
27#include <linux/types.h>
28#include <linux/delay.h>
d95b39c3
MC		 29
30#include <linux/netdevice.h>
30765d05 31#include <linux/if_vlan.h>
d95b39c3
MC		 32#include <linux/etherdevice.h>
33#include <linux/ethtool.h>
34#include <linux/skbuff.h>
35#include <linux/mii.h>
36#include <linux/phy.h>
b88219f8 37#include <linux/phy_fixed.h>
d95b39c3
MC		 38#include <linux/platform_device.h>
39#include <linux/dma-mapping.h>
780019dd 40#include <linux/clk.h>
559764d1 41#include <linux/gpio.h>
60063497 42#include <linux/atomic.h>
d95b39c3
MC		 43
44MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>");
45MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)");
46MODULE_LICENSE("GPL");
72abb461 47MODULE_ALIAS("platform:cpmac");
d95b39c3
MC		 48
49static int debug_level = 8;
50static int dumb_switch;
51
52/* Next 2 are only used in cpmac_probe, so it's pointless to change them */
53module_param(debug_level, int, 0444);
54module_param(dumb_switch, int, 0444);
55
56MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable");
57MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus");
58
25dc27d1 59#define CPMAC_VERSION "0.5.2"
30765d05
FF		 60/* frame size + 802.1q tag + FCS size */
61#define CPMAC_SKB_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
d95b39c3
MC		 62#define CPMAC_QUEUES 8
63
64/* Ethernet registers */
65#define CPMAC_TX_CONTROL 0x0004
66#define CPMAC_TX_TEARDOWN 0x0008
67#define CPMAC_RX_CONTROL 0x0014
68#define CPMAC_RX_TEARDOWN 0x0018
69#define CPMAC_MBP 0x0100
af595154
VB		 70#define MBP_RXPASSCRC 0x40000000
71#define MBP_RXQOS 0x20000000
72#define MBP_RXNOCHAIN 0x10000000
73#define MBP_RXCMF 0x01000000
74#define MBP_RXSHORT 0x00800000
75#define MBP_RXCEF 0x00400000
76#define MBP_RXPROMISC 0x00200000
77#define MBP_PROMISCCHAN(channel) (((channel) & 0x7) << 16)
78#define MBP_RXBCAST 0x00002000
79#define MBP_BCASTCHAN(channel) (((channel) & 0x7) << 8)
80#define MBP_RXMCAST 0x00000020
81#define MBP_MCASTCHAN(channel) ((channel) & 0x7)
d95b39c3
MC		 82#define CPMAC_UNICAST_ENABLE 0x0104
83#define CPMAC_UNICAST_CLEAR 0x0108
84#define CPMAC_MAX_LENGTH 0x010c
85#define CPMAC_BUFFER_OFFSET 0x0110
86#define CPMAC_MAC_CONTROL 0x0160
af595154
VB		 87#define MAC_TXPTYPE 0x00000200
88#define MAC_TXPACE 0x00000040
89#define MAC_MII 0x00000020
90#define MAC_TXFLOW 0x00000010
91#define MAC_RXFLOW 0x00000008
92#define MAC_MTEST 0x00000004
93#define MAC_LOOPBACK 0x00000002
94#define MAC_FDX 0x00000001
d95b39c3 95#define CPMAC_MAC_STATUS 0x0164
af595154
VB		 96#define MAC_STATUS_QOS 0x00000004
97#define MAC_STATUS_RXFLOW 0x00000002
98#define MAC_STATUS_TXFLOW 0x00000001
d95b39c3
MC		 99#define CPMAC_TX_INT_ENABLE 0x0178
100#define CPMAC_TX_INT_CLEAR 0x017c
101#define CPMAC_MAC_INT_VECTOR 0x0180
af595154
VB		 102#define MAC_INT_STATUS 0x00080000
103#define MAC_INT_HOST 0x00040000
104#define MAC_INT_RX 0x00020000
105#define MAC_INT_TX 0x00010000
d95b39c3
MC		 106#define CPMAC_MAC_EOI_VECTOR 0x0184
107#define CPMAC_RX_INT_ENABLE 0x0198
108#define CPMAC_RX_INT_CLEAR 0x019c
109#define CPMAC_MAC_INT_ENABLE 0x01a8
110#define CPMAC_MAC_INT_CLEAR 0x01ac
559764d1 111#define CPMAC_MAC_ADDR_LO(channel) (0x01b0 + (channel) * 4)
d95b39c3
MC		 112#define CPMAC_MAC_ADDR_MID 0x01d0
113#define CPMAC_MAC_ADDR_HI 0x01d4
114#define CPMAC_MAC_HASH_LO 0x01d8
115#define CPMAC_MAC_HASH_HI 0x01dc
116#define CPMAC_TX_PTR(channel) (0x0600 + (channel) * 4)
117#define CPMAC_RX_PTR(channel) (0x0620 + (channel) * 4)
118#define CPMAC_TX_ACK(channel) (0x0640 + (channel) * 4)
119#define CPMAC_RX_ACK(channel) (0x0660 + (channel) * 4)
120#define CPMAC_REG_END 0x0680
8bcd5c6d
VB		 121
122/* Rx/Tx statistics
d95b39c3
MC		 123 * TODO: use some of them to fill stats in cpmac_stats()
124 */
125#define CPMAC_STATS_RX_GOOD 0x0200
126#define CPMAC_STATS_RX_BCAST 0x0204
127#define CPMAC_STATS_RX_MCAST 0x0208
128#define CPMAC_STATS_RX_PAUSE 0x020c
129#define CPMAC_STATS_RX_CRC 0x0210
130#define CPMAC_STATS_RX_ALIGN 0x0214
131#define CPMAC_STATS_RX_OVER 0x0218
132#define CPMAC_STATS_RX_JABBER 0x021c
133#define CPMAC_STATS_RX_UNDER 0x0220
134#define CPMAC_STATS_RX_FRAG 0x0224
135#define CPMAC_STATS_RX_FILTER 0x0228
136#define CPMAC_STATS_RX_QOSFILTER 0x022c
137#define CPMAC_STATS_RX_OCTETS 0x0230
138
139#define CPMAC_STATS_TX_GOOD 0x0234
140#define CPMAC_STATS_TX_BCAST 0x0238
141#define CPMAC_STATS_TX_MCAST 0x023c
142#define CPMAC_STATS_TX_PAUSE 0x0240
143#define CPMAC_STATS_TX_DEFER 0x0244
144#define CPMAC_STATS_TX_COLLISION 0x0248
145#define CPMAC_STATS_TX_SINGLECOLL 0x024c
146#define CPMAC_STATS_TX_MULTICOLL 0x0250
147#define CPMAC_STATS_TX_EXCESSCOLL 0x0254
148#define CPMAC_STATS_TX_LATECOLL 0x0258
149#define CPMAC_STATS_TX_UNDERRUN 0x025c
150#define CPMAC_STATS_TX_CARRIERSENSE 0x0260
151#define CPMAC_STATS_TX_OCTETS 0x0264
152
153#define cpmac_read(base, reg) (readl((void __iomem *)(base) + (reg)))
154#define cpmac_write(base, reg, val) (writel(val, (void __iomem *)(base) + \
155 (reg)))
156
157/* MDIO bus */
158#define CPMAC_MDIO_VERSION 0x0000
159#define CPMAC_MDIO_CONTROL 0x0004
af595154
VB		 160#define MDIOC_IDLE 0x80000000
161#define MDIOC_ENABLE 0x40000000
162#define MDIOC_PREAMBLE 0x00100000
163#define MDIOC_FAULT 0x00080000
164#define MDIOC_FAULTDETECT 0x00040000
165#define MDIOC_INTTEST 0x00020000
166#define MDIOC_CLKDIV(div) ((div) & 0xff)
d95b39c3
MC		 167#define CPMAC_MDIO_ALIVE 0x0008
168#define CPMAC_MDIO_LINK 0x000c
169#define CPMAC_MDIO_ACCESS(channel) (0x0080 + (channel) * 8)
af595154
VB		 170#define MDIO_BUSY 0x80000000
171#define MDIO_WRITE 0x40000000
172#define MDIO_REG(reg) (((reg) & 0x1f) << 21)
173#define MDIO_PHY(phy) (((phy) & 0x1f) << 16)
174#define MDIO_DATA(data) ((data) & 0xffff)
d95b39c3 175#define CPMAC_MDIO_PHYSEL(channel) (0x0084 + (channel) * 8)
af595154
VB		 176#define PHYSEL_LINKSEL 0x00000040
177#define PHYSEL_LINKINT 0x00000020
d95b39c3
MC		 178
179struct cpmac_desc {
180 u32 hw_next;
181 u32 hw_data;
182 u16 buflen;
183 u16 bufflags;
184 u16 datalen;
185 u16 dataflags;
186#define CPMAC_SOP 0x8000
187#define CPMAC_EOP 0x4000
188#define CPMAC_OWN 0x2000
189#define CPMAC_EOQ 0x1000
190 struct sk_buff *skb;
191 struct cpmac_desc *next;
f917d580 192 struct cpmac_desc *prev;
d95b39c3
MC		 193 dma_addr_t mapping;
194 dma_addr_t data_mapping;
195};
196
197struct cpmac_priv {
198 spinlock_t lock;
199 spinlock_t rx_lock;
200 struct cpmac_desc *rx_head;
201 int ring_size;
202 struct cpmac_desc *desc_ring;
203 dma_addr_t dma_ring;
204 void __iomem *regs;
205 struct mii_bus *mii_bus;
206 struct phy_device *phy;
21a8cfe1 207 char phy_name[MII_BUS_ID_SIZE + 3];
d95b39c3
MC		 208 int oldlink, oldspeed, oldduplex;
209 u32 msg_enable;
210 struct net_device *dev;
211 struct work_struct reset_work;
212 struct platform_device *pdev;
67d129d1 213 struct napi_struct napi;
f917d580 214 atomic_t reset_pending;
d95b39c3
MC		 215};
216
217static irqreturn_t cpmac_irq(int, void *);
218static void cpmac_hw_start(struct net_device *dev);
219static void cpmac_hw_stop(struct net_device *dev);
220static int cpmac_stop(struct net_device *dev);
221static int cpmac_open(struct net_device *dev);
222
223static void cpmac_dump_regs(struct net_device *dev)
224{
225 int i;
226 struct cpmac_priv *priv = netdev_priv(dev);
59329d8b 227
d95b39c3
MC		 228 for (i = 0; i < CPMAC_REG_END; i += 4) {
229 if (i % 16 == 0) {
230 if (i)
ff32045e
VB		 231 printk("\n");
232 printk("%s: reg[%p]:", dev->name, priv->regs + i);
d95b39c3 233 }
ff32045e 234 printk(" %08x", cpmac_read(priv->regs, i));
d95b39c3 235 }
ff32045e 236 printk("\n");
d95b39c3
MC		 237}
238
239static void cpmac_dump_desc(struct net_device *dev, struct cpmac_desc *desc)
240{
241 int i;
59329d8b 242
ff32045e 243 printk("%s: desc[%p]:", dev->name, desc);
d95b39c3 244 for (i = 0; i < sizeof(*desc) / 4; i++)
ff32045e
VB		 245 printk(" %08x", ((u32 *)desc)[i]);
246 printk("\n");
d95b39c3
MC		 247}
248
f917d580
MC		 249static void cpmac_dump_all_desc(struct net_device *dev)
250{
251 struct cpmac_priv *priv = netdev_priv(dev);
252 struct cpmac_desc *dump = priv->rx_head;
59329d8b 253
f917d580
MC		 254 do {
255 cpmac_dump_desc(dev, dump);
256 dump = dump->next;
257 } while (dump != priv->rx_head);
258}
259
d95b39c3
MC		 260static void cpmac_dump_skb(struct net_device *dev, struct sk_buff *skb)
261{
262 int i;
59329d8b 263
ff32045e 264 printk("%s: skb 0x%p, len=%d\n", dev->name, skb, skb->len);
d95b39c3
MC		 265 for (i = 0; i < skb->len; i++) {
266 if (i % 16 == 0) {
267 if (i)
ff32045e
VB		 268 printk("\n");
269 printk("%s: data[%p]:", dev->name, skb->data + i);
d95b39c3 270 }
ff32045e 271 printk(" %02x", ((u8 *)skb->data)[i]);
d95b39c3 272 }
ff32045e 273 printk("\n");
d95b39c3
MC		 274}
275
276static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
277{
278 u32 val;
279
280 while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
281 cpu_relax();
282 cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_REG(reg) |
283 MDIO_PHY(phy_id));
284 while ((val = cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0))) & MDIO_BUSY)
285 cpu_relax();
55064efd 286
d95b39c3
MC		 287 return MDIO_DATA(val);
288}
289
290static int cpmac_mdio_write(struct mii_bus *bus, int phy_id,
291 int reg, u16 val)
292{
293 while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
294 cpu_relax();
295 cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_WRITE |
296 MDIO_REG(reg) | MDIO_PHY(phy_id) | MDIO_DATA(val));
55064efd 297
d95b39c3
MC		 298 return 0;
299}
300
301static int cpmac_mdio_reset(struct mii_bus *bus)
302{
780019dd
FF		 303 struct clk *cpmac_clk;
304
305 cpmac_clk = clk_get(&bus->dev, "cpmac");
306 if (IS_ERR(cpmac_clk)) {
f160a2d0 307 pr_err("unable to get cpmac clock\n");
780019dd
FF		 308 return -1;
309 }
d95b39c3
MC		 310 ar7_device_reset(AR7_RESET_BIT_MDIO);
311 cpmac_write(bus->priv, CPMAC_MDIO_CONTROL, MDIOC_ENABLE |
780019dd 312 MDIOC_CLKDIV(clk_get_rate(cpmac_clk) / 2200000 - 1));
55064efd 313
d95b39c3
MC		 314 return 0;
315}
316
317static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, };
318
298cf9be 319static struct mii_bus *cpmac_mii;
d95b39c3 320
d95b39c3
MC		 321static void cpmac_set_multicast_list(struct net_device *dev)
322{
22bedad3 323 struct netdev_hw_addr *ha;
d95b39c3
MC		 324 u8 tmp;
325 u32 mbp, bit, hash[2] = { 0, };
326 struct cpmac_priv *priv = netdev_priv(dev);
327
328 mbp = cpmac_read(priv->regs, CPMAC_MBP);
329 if (dev->flags & IFF_PROMISC) {
330 cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) |
331 MBP_RXPROMISC);
332 } else {
333 cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC);
334 if (dev->flags & IFF_ALLMULTI) {
335 /* enable all multicast mode */
336 cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff);
337 cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff);
338 } else {
8bcd5c6d 339 /* cpmac uses some strange mac address hashing
d95b39c3
MC		 340 * (not crc32)
341 */
22bedad3 342 netdev_for_each_mc_addr(ha, dev) {
d95b39c3 343 bit = 0;
22bedad3 344 tmp = ha->addr[0];
d95b39c3 345 bit ^= (tmp >> 2) ^ (tmp << 4);
22bedad3 346 tmp = ha->addr[1];
d95b39c3 347 bit ^= (tmp >> 4) ^ (tmp << 2);
22bedad3 348 tmp = ha->addr[2];
d95b39c3 349 bit ^= (tmp >> 6) ^ tmp;
22bedad3 350 tmp = ha->addr[3];
d95b39c3 351 bit ^= (tmp >> 2) ^ (tmp << 4);
22bedad3 352 tmp = ha->addr[4];
d95b39c3 353 bit ^= (tmp >> 4) ^ (tmp << 2);
22bedad3 354 tmp = ha->addr[5];
d95b39c3
MC		 355 bit ^= (tmp >> 6) ^ tmp;
356 bit &= 0x3f;
357 hash[bit / 32] |= 1 << (bit % 32);
358 }
359
360 cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]);
361 cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]);
362 }
363 }
364}
365
67d129d1 366static struct sk_buff *cpmac_rx_one(struct cpmac_priv *priv,
d95b39c3
MC		 367 struct cpmac_desc *desc)
368{
369 struct sk_buff *skb, *result = NULL;
370
371 if (unlikely(netif_msg_hw(priv)))
67d129d1 372 cpmac_dump_desc(priv->dev, desc);
d95b39c3
MC		 373 cpmac_write(priv->regs, CPMAC_RX_ACK(0), (u32)desc->mapping);
374 if (unlikely(!desc->datalen)) {
375 if (netif_msg_rx_err(priv) && net_ratelimit())
f160a2d0
VB		 376 netdev_warn(priv->dev, "rx: spurious interrupt\n");
377
d95b39c3
MC		 378 return NULL;
379 }
380
89d71a66 381 skb = netdev_alloc_skb_ip_align(priv->dev, CPMAC_SKB_SIZE);
d95b39c3 382 if (likely(skb)) {
d95b39c3 383 skb_put(desc->skb, desc->datalen);
67d129d1 384 desc->skb->protocol = eth_type_trans(desc->skb, priv->dev);
bc8acf2c 385 skb_checksum_none_assert(desc->skb);
67d129d1
EK		 386 priv->dev->stats.rx_packets++;
387 priv->dev->stats.rx_bytes += desc->datalen;
d95b39c3 388 result = desc->skb;
67d129d1
EK		 389 dma_unmap_single(&priv->dev->dev, desc->data_mapping,
390 CPMAC_SKB_SIZE, DMA_FROM_DEVICE);
d95b39c3 391 desc->skb = skb;
67d129d1 392 desc->data_mapping = dma_map_single(&priv->dev->dev, skb->data,
d95b39c3
MC		 393 CPMAC_SKB_SIZE,
394 DMA_FROM_DEVICE);
395 desc->hw_data = (u32)desc->data_mapping;
396 if (unlikely(netif_msg_pktdata(priv))) {
f160a2d0 397 netdev_dbg(priv->dev, "received packet:\n");
67d129d1 398 cpmac_dump_skb(priv->dev, result);
d95b39c3
MC		 399 }
400 } else {
401 if (netif_msg_rx_err(priv) && net_ratelimit())
f160a2d0
VB		 402 netdev_warn(priv->dev,
403 "low on skbs, dropping packet\n");
404
67d129d1 405 priv->dev->stats.rx_dropped++;
d95b39c3
MC		 406 }
407
408 desc->buflen = CPMAC_SKB_SIZE;
409 desc->dataflags = CPMAC_OWN;
410
411 return result;
412}
413
67d129d1 414static int cpmac_poll(struct napi_struct *napi, int budget)
d95b39c3
MC		 415{
416 struct sk_buff *skb;
f917d580 417 struct cpmac_desc *desc, *restart;
67d129d1 418 struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi);
f917d580 419 int received = 0, processed = 0;
d95b39c3
MC		 420
421 spin_lock(&priv->rx_lock);
422 if (unlikely(!priv->rx_head)) {
423 if (netif_msg_rx_err(priv) && net_ratelimit())
f160a2d0
VB		 424 netdev_warn(priv->dev, "rx: polling, but no queue\n");
425
f917d580 426 spin_unlock(&priv->rx_lock);
288379f0 427 napi_complete(napi);
d95b39c3
MC		 428 return 0;
429 }
430
431 desc = priv->rx_head;
f917d580 432 restart = NULL;
67d129d1 433 while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) {
f917d580
MC		 434 processed++;
435
436 if ((desc->dataflags & CPMAC_EOQ) != 0) {
437 /* The last update to eoq->hw_next didn't happen
8bcd5c6d
VB		 438 * soon enough, and the receiver stopped here.
439 * Remember this descriptor so we can restart
440 * the receiver after freeing some space.
441 */
f917d580
MC		 442 if (unlikely(restart)) {
443 if (netif_msg_rx_err(priv))
f160a2d0
VB		 444 netdev_err(priv->dev, "poll found a"
445 " duplicate EOQ: %p and %p\n",
446 restart, desc);
f917d580
MC		 447 goto fatal_error;
448 }
449
450 restart = desc->next;
451 }
452
67d129d1 453 skb = cpmac_rx_one(priv, desc);
d95b39c3
MC		 454 if (likely(skb)) {
455 netif_receive_skb(skb);
456 received++;
457 }
458 desc = desc->next;
459 }
460
f917d580
MC		 461 if (desc != priv->rx_head) {
462 /* We freed some buffers, but not the whole ring,
8bcd5c6d
VB		 463 * add what we did free to the rx list
464 */
f917d580
MC		 465 desc->prev->hw_next = (u32)0;
466 priv->rx_head->prev->hw_next = priv->rx_head->mapping;
467 }
468
469 /* Optimization: If we did not actually process an EOQ (perhaps because
470 * of quota limits), check to see if the tail of the queue has EOQ set.
8bcd5c6d
VB		 471 * We should immediately restart in that case so that the receiver can
472 * restart and run in parallel with more packet processing.
473 * This lets us handle slightly larger bursts before running
474 * out of ring space (assuming dev->weight < ring_size)
475 */
f917d580
MC		 476
477 if (!restart &&
478 (priv->rx_head->prev->dataflags & (CPMAC_OWN|CPMAC_EOQ))
479 == CPMAC_EOQ &&
480 (priv->rx_head->dataflags & CPMAC_OWN) != 0) {
481 /* reset EOQ so the poll loop (above) doesn't try to
8bcd5c6d
VB		 482 * restart this when it eventually gets to this descriptor.
483 */
f917d580
MC		 484 priv->rx_head->prev->dataflags &= ~CPMAC_EOQ;
485 restart = priv->rx_head;
486 }
487
488 if (restart) {
489 priv->dev->stats.rx_errors++;
490 priv->dev->stats.rx_fifo_errors++;
491 if (netif_msg_rx_err(priv) && net_ratelimit())
f160a2d0 492 netdev_warn(priv->dev, "rx dma ring overrun\n");
f917d580
MC		 493
494 if (unlikely((restart->dataflags & CPMAC_OWN) == 0)) {
495 if (netif_msg_drv(priv))
f160a2d0
VB		 496 netdev_err(priv->dev, "cpmac_poll is trying "
497 "to restart rx from a descriptor "
498 "that's not free: %p\n", restart);
9e1634a7 499 goto fatal_error;
f917d580
MC		 500 }
501
502 cpmac_write(priv->regs, CPMAC_RX_PTR(0), restart->mapping);
503 }
504
d95b39c3
MC		 505 priv->rx_head = desc;
506 spin_unlock(&priv->rx_lock);
d95b39c3 507 if (unlikely(netif_msg_rx_status(priv)))
f160a2d0
VB		 508 netdev_dbg(priv->dev, "poll processed %d packets\n", received);
509
f917d580
MC		 510 if (processed == 0) {
511 /* we ran out of packets to read,
8bcd5c6d
VB		 512 * revert to interrupt-driven mode
513 */
288379f0 514 napi_complete(napi);
d95b39c3
MC		 515 cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
516 return 0;
517 }
518
519 return 1;
f917d580
MC		 520
521fatal_error:
522 /* Something went horribly wrong.
8bcd5c6d
VB		 523 * Reset hardware to try to recover rather than wedging.
524 */
f917d580 525 if (netif_msg_drv(priv)) {
f160a2d0
VB		 526 netdev_err(priv->dev, "cpmac_poll is confused. "
527 "Resetting hardware\n");
f917d580 528 cpmac_dump_all_desc(priv->dev);
f160a2d0
VB		 529 netdev_dbg(priv->dev, "RX_PTR(0)=0x%08x RX_ACK(0)=0x%08x\n",
530 cpmac_read(priv->regs, CPMAC_RX_PTR(0)),
531 cpmac_read(priv->regs, CPMAC_RX_ACK(0)));
f917d580
MC		 532 }
533
534 spin_unlock(&priv->rx_lock);
288379f0 535 napi_complete(napi);
fd2ea0a7 536 netif_tx_stop_all_queues(priv->dev);
f917d580
MC		 537 napi_disable(&priv->napi);
538
539 atomic_inc(&priv->reset_pending);
540 cpmac_hw_stop(priv->dev);
541 if (!schedule_work(&priv->reset_work))
542 atomic_dec(&priv->reset_pending);
55064efd 543
f917d580
MC		 544 return 0;
545
d95b39c3
MC		 546}
547
548static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
549{
550 int queue, len;
551 struct cpmac_desc *desc;
552 struct cpmac_priv *priv = netdev_priv(dev);
553
f917d580
MC		 554 if (unlikely(atomic_read(&priv->reset_pending)))
555 return NETDEV_TX_BUSY;
556
6cd043d9
MC		 557 if (unlikely(skb_padto(skb, ETH_ZLEN)))
558 return NETDEV_TX_OK;
d95b39c3
MC		 559
560 len = max(skb->len, ETH_ZLEN);
ba596a01 561 queue = skb_get_queue_mapping(skb);
d95b39c3 562 netif_stop_subqueue(dev, queue);
d95b39c3
MC		 563
564 desc = &priv->desc_ring[queue];
565 if (unlikely(desc->dataflags & CPMAC_OWN)) {
566 if (netif_msg_tx_err(priv) && net_ratelimit())
f160a2d0
VB		 567 netdev_warn(dev, "tx dma ring full\n");
568
6cd043d9 569 return NETDEV_TX_BUSY;
d95b39c3
MC		 570 }
571
572 spin_lock(&priv->lock);
d95b39c3
MC		 573 spin_unlock(&priv->lock);
574 desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN;
575 desc->skb = skb;
576 desc->data_mapping = dma_map_single(&dev->dev, skb->data, len,
577 DMA_TO_DEVICE);
578 desc->hw_data = (u32)desc->data_mapping;
579 desc->datalen = len;
580 desc->buflen = len;
581 if (unlikely(netif_msg_tx_queued(priv)))
f160a2d0 582 netdev_dbg(dev, "sending 0x%p, len=%d\n", skb, skb->len);
d95b39c3
MC		 583 if (unlikely(netif_msg_hw(priv)))
584 cpmac_dump_desc(dev, desc);
585 if (unlikely(netif_msg_pktdata(priv)))
586 cpmac_dump_skb(dev, skb);
587 cpmac_write(priv->regs, CPMAC_TX_PTR(queue), (u32)desc->mapping);
588
6cd043d9 589 return NETDEV_TX_OK;
d95b39c3
MC		 590}
591
592static void cpmac_end_xmit(struct net_device *dev, int queue)
593{
594 struct cpmac_desc *desc;
595 struct cpmac_priv *priv = netdev_priv(dev);
596
597 desc = &priv->desc_ring[queue];
598 cpmac_write(priv->regs, CPMAC_TX_ACK(queue), (u32)desc->mapping);
599 if (likely(desc->skb)) {
600 spin_lock(&priv->lock);
601 dev->stats.tx_packets++;
602 dev->stats.tx_bytes += desc->skb->len;
603 spin_unlock(&priv->lock);
604 dma_unmap_single(&dev->dev, desc->data_mapping, desc->skb->len,
605 DMA_TO_DEVICE);
606
607 if (unlikely(netif_msg_tx_done(priv)))
f160a2d0
VB		 608 netdev_dbg(dev, "sent 0x%p, len=%d\n",
609 desc->skb, desc->skb->len);
d95b39c3
MC		 610
611 dev_kfree_skb_irq(desc->skb);
612 desc->skb = NULL;
0220ff7f 613 if (__netif_subqueue_stopped(dev, queue))
d95b39c3 614 netif_wake_subqueue(dev, queue);
d95b39c3
MC		 615 } else {
616 if (netif_msg_tx_err(priv) && net_ratelimit())
f160a2d0 617 netdev_warn(dev, "end_xmit: spurious interrupt\n");
0220ff7f 618 if (__netif_subqueue_stopped(dev, queue))
d95b39c3 619 netif_wake_subqueue(dev, queue);
d95b39c3
MC		 620 }
621}
622
623static void cpmac_hw_stop(struct net_device *dev)
624{
625 int i;
626 struct cpmac_priv *priv = netdev_priv(dev);
a0ea2ac8 627 struct plat_cpmac_data *pdata = dev_get_platdata(&priv->pdev->dev);
d95b39c3
MC		 628
629 ar7_device_reset(pdata->reset_bit);
630 cpmac_write(priv->regs, CPMAC_RX_CONTROL,
631 cpmac_read(priv->regs, CPMAC_RX_CONTROL) & ~1);
632 cpmac_write(priv->regs, CPMAC_TX_CONTROL,
633 cpmac_read(priv->regs, CPMAC_TX_CONTROL) & ~1);
634 for (i = 0; i < 8; i++) {
635 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
636 cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
637 }
638 cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
639 cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
640 cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
641 cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
642 cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
643 cpmac_read(priv->regs, CPMAC_MAC_CONTROL) & ~MAC_MII);
644}
645
646static void cpmac_hw_start(struct net_device *dev)
647{
648 int i;
649 struct cpmac_priv *priv = netdev_priv(dev);
a0ea2ac8 650 struct plat_cpmac_data *pdata = dev_get_platdata(&priv->pdev->dev);
d95b39c3
MC		 651
652 ar7_device_reset(pdata->reset_bit);
653 for (i = 0; i < 8; i++) {
654 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
655 cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
656 }
657 cpmac_write(priv->regs, CPMAC_RX_PTR(0), priv->rx_head->mapping);
658
659 cpmac_write(priv->regs, CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST |
660 MBP_RXMCAST);
661 cpmac_write(priv->regs, CPMAC_BUFFER_OFFSET, 0);
662 for (i = 0; i < 8; i++)
663 cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]);
664 cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]);
665 cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] |
666 (dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) |
667 (dev->dev_addr[3] << 24));
668 cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE);
669 cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
670 cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
671 cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
672 cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
673 cpmac_write(priv->regs, CPMAC_UNICAST_ENABLE, 1);
674 cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
675 cpmac_write(priv->regs, CPMAC_TX_INT_ENABLE, 0xff);
676 cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
677
678 cpmac_write(priv->regs, CPMAC_RX_CONTROL,
679 cpmac_read(priv->regs, CPMAC_RX_CONTROL) | 1);
680 cpmac_write(priv->regs, CPMAC_TX_CONTROL,
681 cpmac_read(priv->regs, CPMAC_TX_CONTROL) | 1);
682 cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
683 cpmac_read(priv->regs, CPMAC_MAC_CONTROL) | MAC_MII |
684 MAC_FDX);
685}
686
687static void cpmac_clear_rx(struct net_device *dev)
688{
689 struct cpmac_priv *priv = netdev_priv(dev);
690 struct cpmac_desc *desc;
691 int i;
59329d8b 692
d95b39c3
MC		 693 if (unlikely(!priv->rx_head))
694 return;
695 desc = priv->rx_head;
696 for (i = 0; i < priv->ring_size; i++) {
697 if ((desc->dataflags & CPMAC_OWN) == 0) {
698 if (netif_msg_rx_err(priv) && net_ratelimit())
f160a2d0 699 netdev_warn(dev, "packet dropped\n");
d95b39c3
MC		 700 if (unlikely(netif_msg_hw(priv)))
701 cpmac_dump_desc(dev, desc);
702 desc->dataflags = CPMAC_OWN;
703 dev->stats.rx_dropped++;
704 }
f917d580 705 desc->hw_next = desc->next->mapping;
d95b39c3
MC		 706 desc = desc->next;
707 }
f917d580 708 priv->rx_head->prev->hw_next = 0;
d95b39c3
MC		 709}
710
711static void cpmac_clear_tx(struct net_device *dev)
712{
713 struct cpmac_priv *priv = netdev_priv(dev);
714 int i;
59329d8b 715
d95b39c3
MC		 716 if (unlikely(!priv->desc_ring))
717 return;
6cd043d9
MC		 718 for (i = 0; i < CPMAC_QUEUES; i++) {
719 priv->desc_ring[i].dataflags = 0;
d95b39c3
MC		 720 if (priv->desc_ring[i].skb) {
721 dev_kfree_skb_any(priv->desc_ring[i].skb);
f917d580 722 priv->desc_ring[i].skb = NULL;
d95b39c3 723 }
6cd043d9 724 }
d95b39c3
MC		 725}
726
727static void cpmac_hw_error(struct work_struct *work)
728{
729 struct cpmac_priv *priv =
730 container_of(work, struct cpmac_priv, reset_work);
731
732 spin_lock(&priv->rx_lock);
733 cpmac_clear_rx(priv->dev);
734 spin_unlock(&priv->rx_lock);
735 cpmac_clear_tx(priv->dev);
736 cpmac_hw_start(priv->dev);
f917d580
MC		 737 barrier();
738 atomic_dec(&priv->reset_pending);
739
fd2ea0a7 740 netif_tx_wake_all_queues(priv->dev);
f917d580
MC		 741 cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
742}
743
744static void cpmac_check_status(struct net_device *dev)
745{
746 struct cpmac_priv *priv = netdev_priv(dev);
747
748 u32 macstatus = cpmac_read(priv->regs, CPMAC_MAC_STATUS);
749 int rx_channel = (macstatus >> 8) & 7;
750 int rx_code = (macstatus >> 12) & 15;
751 int tx_channel = (macstatus >> 16) & 7;
752 int tx_code = (macstatus >> 20) & 15;
753
754 if (rx_code || tx_code) {
755 if (netif_msg_drv(priv) && net_ratelimit()) {
756 /* Can't find any documentation on what these
8bcd5c6d 757 * error codes actually are. So just log them and hope..
f917d580
MC		 758 */
759 if (rx_code)
f160a2d0
VB		 760 netdev_warn(dev, "host error %d on rx "
761 "channel %d (macstatus %08x), resetting\n",
762 rx_code, rx_channel, macstatus);
f917d580 763 if (tx_code)
f160a2d0
VB		 764 netdev_warn(dev, "host error %d on tx "
765 "channel %d (macstatus %08x), resetting\n",
766 tx_code, tx_channel, macstatus);
f917d580
MC		 767 }
768
fd2ea0a7 769 netif_tx_stop_all_queues(dev);
f917d580
MC		 770 cpmac_hw_stop(dev);
771 if (schedule_work(&priv->reset_work))
772 atomic_inc(&priv->reset_pending);
773 if (unlikely(netif_msg_hw(priv)))
774 cpmac_dump_regs(dev);
775 }
776 cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
d95b39c3
MC		 777}
778
779static irqreturn_t cpmac_irq(int irq, void *dev_id)
780{
781 struct net_device *dev = dev_id;
782 struct cpmac_priv *priv;
783 int queue;
784 u32 status;
785
d95b39c3
MC		 786 priv = netdev_priv(dev);
787
788 status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR);
789
790 if (unlikely(netif_msg_intr(priv)))
f160a2d0 791 netdev_dbg(dev, "interrupt status: 0x%08x\n", status);
d95b39c3
MC		 792
793 if (status & MAC_INT_TX)
794 cpmac_end_xmit(dev, (status & 7));
795
796 if (status & MAC_INT_RX) {
797 queue = (status >> 8) & 7;
288379f0 798 if (napi_schedule_prep(&priv->napi)) {
67d129d1 799 cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue);
288379f0 800 __napi_schedule(&priv->napi);
67d129d1 801 }
d95b39c3
MC		 802 }
803
804 cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0);
805
f917d580
MC		 806 if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS)))
807 cpmac_check_status(dev);
d95b39c3
MC		 808
809 return IRQ_HANDLED;
810}
811
812static void cpmac_tx_timeout(struct net_device *dev)
813{
f917d580 814 struct cpmac_priv *priv = netdev_priv(dev);
d95b39c3
MC		 815
816 spin_lock(&priv->lock);
817 dev->stats.tx_errors++;
818 spin_unlock(&priv->lock);
819 if (netif_msg_tx_err(priv) && net_ratelimit())
f160a2d0 820 netdev_warn(dev, "transmit timeout\n");
f917d580
MC		 821
822 atomic_inc(&priv->reset_pending);
823 barrier();
824 cpmac_clear_tx(dev);
825 barrier();
826 atomic_dec(&priv->reset_pending);
827
fd2ea0a7 828 netif_tx_wake_all_queues(priv->dev);
d95b39c3
MC		 829}
830
831static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
832{
833 struct cpmac_priv *priv = netdev_priv(dev);
59329d8b 834
d95b39c3
MC		 835 if (!(netif_running(dev)))
836 return -EINVAL;
837 if (!priv->phy)
838 return -EINVAL;
d95b39c3 839
28b04113 840 return phy_mii_ioctl(priv->phy, ifr, cmd);
d95b39c3
MC		 841}
842
843static int cpmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
844{
845 struct cpmac_priv *priv = netdev_priv(dev);
846
847 if (priv->phy)
848 return phy_ethtool_gset(priv->phy, cmd);
849
850 return -EINVAL;
851}
852
853static int cpmac_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
854{
855 struct cpmac_priv *priv = netdev_priv(dev);
856
857 if (!capable(CAP_NET_ADMIN))
858 return -EPERM;
859
860 if (priv->phy)
861 return phy_ethtool_sset(priv->phy, cmd);
862
863 return -EINVAL;
864}
865
559764d1
FF		 866static void cpmac_get_ringparam(struct net_device *dev,
867 struct ethtool_ringparam *ring)
d95b39c3
MC		 868{
869 struct cpmac_priv *priv = netdev_priv(dev);
870
871 ring->rx_max_pending = 1024;
872 ring->rx_mini_max_pending = 1;
873 ring->rx_jumbo_max_pending = 1;
874 ring->tx_max_pending = 1;
875
876 ring->rx_pending = priv->ring_size;
877 ring->rx_mini_pending = 1;
878 ring->rx_jumbo_pending = 1;
879 ring->tx_pending = 1;
880}
881
559764d1
FF		 882static int cpmac_set_ringparam(struct net_device *dev,
883 struct ethtool_ringparam *ring)
d95b39c3
MC		 884{
885 struct cpmac_priv *priv = netdev_priv(dev);
886
6cd043d9 887 if (netif_running(dev))
d95b39c3
MC		 888 return -EBUSY;
889 priv->ring_size = ring->rx_pending;
55064efd 890
d95b39c3
MC		 891 return 0;
892}
893
894static void cpmac_get_drvinfo(struct net_device *dev,
895 struct ethtool_drvinfo *info)
896{
7826d43f
JP		 897 strlcpy(info->driver, "cpmac", sizeof(info->driver));
898 strlcpy(info->version, CPMAC_VERSION, sizeof(info->version));
899 snprintf(info->bus_info, sizeof(info->bus_info), "%s", "cpmac");
d95b39c3
MC		 900 info->regdump_len = 0;
901}
902
903static const struct ethtool_ops cpmac_ethtool_ops = {
904 .get_settings = cpmac_get_settings,
905 .set_settings = cpmac_set_settings,
906 .get_drvinfo = cpmac_get_drvinfo,
907 .get_link = ethtool_op_get_link,
908 .get_ringparam = cpmac_get_ringparam,
909 .set_ringparam = cpmac_set_ringparam,
910};
911
912static void cpmac_adjust_link(struct net_device *dev)
913{
914 struct cpmac_priv *priv = netdev_priv(dev);
915 int new_state = 0;
916
917 spin_lock(&priv->lock);
918 if (priv->phy->link) {
fd2ea0a7 919 netif_tx_start_all_queues(dev);
d95b39c3
MC		 920 if (priv->phy->duplex != priv->oldduplex) {
921 new_state = 1;
922 priv->oldduplex = priv->phy->duplex;
923 }
924
925 if (priv->phy->speed != priv->oldspeed) {
926 new_state = 1;
927 priv->oldspeed = priv->phy->speed;
928 }
929
930 if (!priv->oldlink) {
931 new_state = 1;
932 priv->oldlink = 1;
d95b39c3
MC		 933 }
934 } else if (priv->oldlink) {
d95b39c3
MC		 935 new_state = 1;
936 priv->oldlink = 0;
937 priv->oldspeed = 0;
938 priv->oldduplex = -1;
939 }
940
941 if (new_state && netif_msg_link(priv) && net_ratelimit())
942 phy_print_status(priv->phy);
943
944 spin_unlock(&priv->lock);
945}
946
947static int cpmac_open(struct net_device *dev)
948{
949 int i, size, res;
950 struct cpmac_priv *priv = netdev_priv(dev);
951 struct resource *mem;
952 struct cpmac_desc *desc;
953 struct sk_buff *skb;
954
d95b39c3 955 mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
7e307c7a 956 if (!request_mem_region(mem->start, resource_size(mem), dev->name)) {
d95b39c3 957 if (netif_msg_drv(priv))
f160a2d0
VB		 958 netdev_err(dev, "failed to request registers\n");
959
d95b39c3
MC		 960 res = -ENXIO;
961 goto fail_reserve;
962 }
963
7e307c7a 964 priv->regs = ioremap(mem->start, resource_size(mem));
d95b39c3
MC		 965 if (!priv->regs) {
966 if (netif_msg_drv(priv))
f160a2d0
VB		 967 netdev_err(dev, "failed to remap registers\n");
968
d95b39c3
MC		 969 res = -ENXIO;
970 goto fail_remap;
971 }
972
973 size = priv->ring_size + CPMAC_QUEUES;
974 priv->desc_ring = dma_alloc_coherent(&dev->dev,
975 sizeof(struct cpmac_desc) * size,
976 &priv->dma_ring,
977 GFP_KERNEL);
978 if (!priv->desc_ring) {
979 res = -ENOMEM;
980 goto fail_alloc;
981 }
982
983 for (i = 0; i < size; i++)
984 priv->desc_ring[i].mapping = priv->dma_ring + sizeof(*desc) * i;
985
986 priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
987 for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) {
89d71a66 988 skb = netdev_alloc_skb_ip_align(dev, CPMAC_SKB_SIZE);
d95b39c3
MC		 989 if (unlikely(!skb)) {
990 res = -ENOMEM;
991 goto fail_desc;
992 }
d95b39c3
MC		 993 desc->skb = skb;
994 desc->data_mapping = dma_map_single(&dev->dev, skb->data,
995 CPMAC_SKB_SIZE,
996 DMA_FROM_DEVICE);
997 desc->hw_data = (u32)desc->data_mapping;
998 desc->buflen = CPMAC_SKB_SIZE;
999 desc->dataflags = CPMAC_OWN;
1000 desc->next = &priv->rx_head[(i + 1) % priv->ring_size];
f917d580 1001 desc->next->prev = desc;
d95b39c3
MC		 1002 desc->hw_next = (u32)desc->next->mapping;
1003 }
1004
f917d580
MC		 1005 priv->rx_head->prev->hw_next = (u32)0;
1006
559764d1
FF		 1007 res = request_irq(dev->irq, cpmac_irq, IRQF_SHARED, dev->name, dev);
1008 if (res) {
d95b39c3 1009 if (netif_msg_drv(priv))
f160a2d0
VB		 1010 netdev_err(dev, "failed to obtain irq\n");
1011
d95b39c3
MC		 1012 goto fail_irq;
1013 }
1014
f917d580 1015 atomic_set(&priv->reset_pending, 0);
d95b39c3
MC		 1016 INIT_WORK(&priv->reset_work, cpmac_hw_error);
1017 cpmac_hw_start(dev);
1018
67d129d1 1019 napi_enable(&priv->napi);
d95b39c3
MC		 1020 priv->phy->state = PHY_CHANGELINK;
1021 phy_start(priv->phy);
1022
1023 return 0;
1024
1025fail_irq:
1026fail_desc:
1027 for (i = 0; i < priv->ring_size; i++) {
1028 if (priv->rx_head[i].skb) {
1029 dma_unmap_single(&dev->dev,
1030 priv->rx_head[i].data_mapping,
1031 CPMAC_SKB_SIZE,
1032 DMA_FROM_DEVICE);
1033 kfree_skb(priv->rx_head[i].skb);
1034 }
1035 }
1036fail_alloc:
1037 kfree(priv->desc_ring);
1038 iounmap(priv->regs);
1039
1040fail_remap:
7e307c7a 1041 release_mem_region(mem->start, resource_size(mem));
d95b39c3
MC		 1042
1043fail_reserve:
d95b39c3
MC		 1044 return res;
1045}
1046
1047static int cpmac_stop(struct net_device *dev)
1048{
1049 int i;
1050 struct cpmac_priv *priv = netdev_priv(dev);
1051 struct resource *mem;
1052
fd2ea0a7 1053 netif_tx_stop_all_queues(dev);
d95b39c3
MC		 1054
1055 cancel_work_sync(&priv->reset_work);
67d129d1 1056 napi_disable(&priv->napi);
d95b39c3 1057 phy_stop(priv->phy);
d95b39c3
MC		 1058
1059 cpmac_hw_stop(dev);
1060
1061 for (i = 0; i < 8; i++)
1062 cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
1063 cpmac_write(priv->regs, CPMAC_RX_PTR(0), 0);
1064 cpmac_write(priv->regs, CPMAC_MBP, 0);
1065
1066 free_irq(dev->irq, dev);
1067 iounmap(priv->regs);
1068 mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
7e307c7a 1069 release_mem_region(mem->start, resource_size(mem));
d95b39c3
MC		 1070 priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
1071 for (i = 0; i < priv->ring_size; i++) {
1072 if (priv->rx_head[i].skb) {
1073 dma_unmap_single(&dev->dev,
1074 priv->rx_head[i].data_mapping,
1075 CPMAC_SKB_SIZE,
1076 DMA_FROM_DEVICE);
1077 kfree_skb(priv->rx_head[i].skb);
1078 }
1079 }
1080
1081 dma_free_coherent(&dev->dev, sizeof(struct cpmac_desc) *
1082 (CPMAC_QUEUES + priv->ring_size),
1083 priv->desc_ring, priv->dma_ring);
55064efd 1084
d95b39c3
MC		 1085 return 0;
1086}
1087
63ef7d89
AB		 1088static const struct net_device_ops cpmac_netdev_ops = {
1089 .ndo_open = cpmac_open,
1090 .ndo_stop = cpmac_stop,
1091 .ndo_start_xmit = cpmac_start_xmit,
1092 .ndo_tx_timeout = cpmac_tx_timeout,
afc4b13d 1093 .ndo_set_rx_mode = cpmac_set_multicast_list,
6a9b6546 1094 .ndo_do_ioctl = cpmac_ioctl,
63ef7d89
AB		 1095 .ndo_change_mtu = eth_change_mtu,
1096 .ndo_validate_addr = eth_validate_addr,
1097 .ndo_set_mac_address = eth_mac_addr,
1098};
1099
d95b39c3
MC		 1100static int external_switch;
1101
f57ae66e 1102static int cpmac_probe(struct platform_device *pdev)
d95b39c3 1103{
69bd4ae5 1104 int rc, phy_id;
762c6aa1 1105 char mdio_bus_id[MII_BUS_ID_SIZE];
d95b39c3
MC		 1106 struct resource *mem;
1107 struct cpmac_priv *priv;
1108 struct net_device *dev;
1109 struct plat_cpmac_data *pdata;
1110
a0ea2ac8 1111 pdata = dev_get_platdata(&pdev->dev);
d95b39c3 1112
76e61eaa 1113 if (external_switch || dumb_switch) {
a19c5d68 1114 strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */
76e61eaa
FF		 1115 phy_id = pdev->id;
1116 } else {
1117 for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
1118 if (!(pdata->phy_mask & (1 << phy_id)))
1119 continue;
1120 if (!cpmac_mii->phy_map[phy_id])
1121 continue;
762c6aa1 1122 strncpy(mdio_bus_id, cpmac_mii->id, MII_BUS_ID_SIZE);
76e61eaa
FF		 1123 break;
1124 }
d95b39c3
MC		 1125 }
1126
1127 if (phy_id == PHY_MAX_ADDR) {
559764d1 1128 dev_err(&pdev->dev, "no PHY present, falling back "
f160a2d0 1129 "to switch on MDIO bus 0\n");
a19c5d68 1130 strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */
9fba1c31 1131 phy_id = pdev->id;
d95b39c3 1132 }
9951e048 1133 mdio_bus_id[sizeof(mdio_bus_id) - 1] = '\0';
d95b39c3
MC		 1134
1135 dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES);
41de8d4c 1136 if (!dev)
d95b39c3 1137 return -ENOMEM;
d95b39c3
MC		 1138
1139 platform_set_drvdata(pdev, dev);
1140 priv = netdev_priv(dev);
1141
1142 priv->pdev = pdev;
1143 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
1144 if (!mem) {
1145 rc = -ENODEV;
0465be8f 1146 goto out;
d95b39c3
MC		 1147 }
1148
1149 dev->irq = platform_get_irq_byname(pdev, "irq");
1150
63ef7d89
AB		 1151 dev->netdev_ops = &cpmac_netdev_ops;
1152 dev->ethtool_ops = &cpmac_ethtool_ops;
d95b39c3 1153
67d129d1
EK		 1154 netif_napi_add(dev, &priv->napi, cpmac_poll, 64);
1155
d95b39c3
MC		 1156 spin_lock_init(&priv->lock);
1157 spin_lock_init(&priv->rx_lock);
1158 priv->dev = dev;
1159 priv->ring_size = 64;
1160 priv->msg_enable = netif_msg_init(debug_level, 0xff);
2447f2f3 1161 memcpy(dev->dev_addr, pdata->dev_addr, sizeof(pdata->dev_addr));
b88219f8 1162
559764d1
FF		 1163 snprintf(priv->phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT,
1164 mdio_bus_id, phy_id);
76e61eaa 1165
f9a8f83b
FF		 1166 priv->phy = phy_connect(dev, priv->phy_name, cpmac_adjust_link,
1167 PHY_INTERFACE_MODE_MII);
76e61eaa 1168
b88219f8
EK		 1169 if (IS_ERR(priv->phy)) {
1170 if (netif_msg_drv(priv))
f160a2d0
VB		 1171 dev_err(&pdev->dev, "Could not attach to PHY\n");
1172
ed770f01 1173 rc = PTR_ERR(priv->phy);
0465be8f 1174 goto out;
b88219f8 1175 }
d95b39c3 1176
559764d1
FF		 1177 rc = register_netdev(dev);
1178 if (rc) {
f160a2d0 1179 dev_err(&pdev->dev, "Could not register net device\n");
d95b39c3
MC		 1180 goto fail;
1181 }
1182
1183 if (netif_msg_probe(priv)) {
f160a2d0
VB		 1184 dev_info(&pdev->dev, "regs: %p, irq: %d, phy: %s, "
1185 "mac: %pM\n", (void *)mem->start, dev->irq,
1186 priv->phy_name, dev->dev_addr);
d95b39c3 1187 }
55064efd 1188
d95b39c3
MC		 1189 return 0;
1190
1191fail:
1192 free_netdev(dev);
0465be8f 1193out:
d95b39c3
MC		 1194 return rc;
1195}
1196
f57ae66e 1197static int cpmac_remove(struct platform_device *pdev)
d95b39c3
MC		 1198{
1199 struct net_device *dev = platform_get_drvdata(pdev);
59329d8b 1200
d95b39c3
MC		 1201 unregister_netdev(dev);
1202 free_netdev(dev);
55064efd 1203
d95b39c3
MC		 1204 return 0;
1205}
1206
1207static struct platform_driver cpmac_driver = {
96a8d3c1
VB		 1208 .driver = {
1209 .name = "cpmac",
96a8d3c1
VB		 1210 },
1211 .probe = cpmac_probe,
f57ae66e 1212 .remove = cpmac_remove,
d95b39c3
MC		 1213};
1214
f57ae66e 1215int cpmac_init(void)
d95b39c3
MC		 1216{
1217 u32 mask;
1218 int i, res;
1219
298cf9be
LB		 1220 cpmac_mii = mdiobus_alloc();
1221 if (cpmac_mii == NULL)
1222 return -ENOMEM;
1223
1224 cpmac_mii->name = "cpmac-mii";
1225 cpmac_mii->read = cpmac_mdio_read;
1226 cpmac_mii->write = cpmac_mdio_write;
1227 cpmac_mii->reset = cpmac_mdio_reset;
1228 cpmac_mii->irq = mii_irqs;
1229
1230 cpmac_mii->priv = ioremap(AR7_REGS_MDIO, 256);
d95b39c3 1231
298cf9be 1232 if (!cpmac_mii->priv) {
f160a2d0 1233 pr_err("Can't ioremap mdio registers\n");
298cf9be
LB		 1234 res = -ENXIO;
1235 goto fail_alloc;
d95b39c3
MC		 1236 }
1237
1238#warning FIXME: unhardcode gpio&reset bits
1239 ar7_gpio_disable(26);
1240 ar7_gpio_disable(27);
1241 ar7_device_reset(AR7_RESET_BIT_CPMAC_LO);
1242 ar7_device_reset(AR7_RESET_BIT_CPMAC_HI);
1243 ar7_device_reset(AR7_RESET_BIT_EPHY);
1244
298cf9be 1245 cpmac_mii->reset(cpmac_mii);
d95b39c3 1246
559764d1
FF		 1247 for (i = 0; i < 300; i++) {
1248 mask = cpmac_read(cpmac_mii->priv, CPMAC_MDIO_ALIVE);
1249 if (mask)
d95b39c3
MC		 1250 break;
1251 else
e4540aa9 1252 msleep(10);
559764d1 1253 }
d95b39c3
MC		 1254
1255 mask &= 0x7fffffff;
1256 if (mask & (mask - 1)) {
1257 external_switch = 1;
1258 mask = 0;
1259 }
1260
298cf9be 1261 cpmac_mii->phy_mask = ~(mask | 0x80000000);
d1733f07 1262 snprintf(cpmac_mii->id, MII_BUS_ID_SIZE, "cpmac-1");
d95b39c3 1263
298cf9be 1264 res = mdiobus_register(cpmac_mii);
d95b39c3
MC		 1265 if (res)
1266 goto fail_mii;
1267
1268 res = platform_driver_register(&cpmac_driver);
1269 if (res)
1270 goto fail_cpmac;
1271
1272 return 0;
1273
1274fail_cpmac:
298cf9be 1275 mdiobus_unregister(cpmac_mii);
d95b39c3
MC		 1276
1277fail_mii:
298cf9be
LB		 1278 iounmap(cpmac_mii->priv);
1279
1280fail_alloc:
1281 mdiobus_free(cpmac_mii);
d95b39c3
MC		 1282
1283 return res;
1284}
1285
f57ae66e 1286void cpmac_exit(void)
d95b39c3
MC		 1287{
1288 platform_driver_unregister(&cpmac_driver);
298cf9be 1289 mdiobus_unregister(cpmac_mii);
298cf9be 1290 iounmap(cpmac_mii->priv);
48a29516 1291 mdiobus_free(cpmac_mii);
d95b39c3
MC		 1292}
1293
1294module_init(cpmac_init);
1295module_exit(cpmac_exit);
Linux kernel - Deliverables
This page took 0.858084 seconds and 5 git commands to generate.