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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> | |
20 | #include <linux/init.h> | |
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> | |
29 | #include <linux/version.h> | |
30 | ||
31 | #include <linux/netdevice.h> | |
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> | |
40 | #include <asm/gpio.h> | |
41 | ||
42 | MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>"); | |
43 | MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)"); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
46 | static int debug_level = 8; | |
47 | static int dumb_switch; | |
48 | ||
49 | /* Next 2 are only used in cpmac_probe, so it's pointless to change them */ | |
50 | module_param(debug_level, int, 0444); | |
51 | module_param(dumb_switch, int, 0444); | |
52 | ||
53 | MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable"); | |
54 | MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus"); | |
55 | ||
56 | #define CPMAC_VERSION "0.5.0" | |
d95b39c3 MC |
57 | /* frame size + 802.1q tag */ |
58 | #define CPMAC_SKB_SIZE (ETH_FRAME_LEN + 4) | |
59 | #define CPMAC_QUEUES 8 | |
60 | ||
61 | /* Ethernet registers */ | |
62 | #define CPMAC_TX_CONTROL 0x0004 | |
63 | #define CPMAC_TX_TEARDOWN 0x0008 | |
64 | #define CPMAC_RX_CONTROL 0x0014 | |
65 | #define CPMAC_RX_TEARDOWN 0x0018 | |
66 | #define CPMAC_MBP 0x0100 | |
67 | # define MBP_RXPASSCRC 0x40000000 | |
68 | # define MBP_RXQOS 0x20000000 | |
69 | # define MBP_RXNOCHAIN 0x10000000 | |
70 | # define MBP_RXCMF 0x01000000 | |
71 | # define MBP_RXSHORT 0x00800000 | |
72 | # define MBP_RXCEF 0x00400000 | |
73 | # define MBP_RXPROMISC 0x00200000 | |
74 | # define MBP_PROMISCCHAN(channel) (((channel) & 0x7) << 16) | |
75 | # define MBP_RXBCAST 0x00002000 | |
76 | # define MBP_BCASTCHAN(channel) (((channel) & 0x7) << 8) | |
77 | # define MBP_RXMCAST 0x00000020 | |
78 | # define MBP_MCASTCHAN(channel) ((channel) & 0x7) | |
79 | #define CPMAC_UNICAST_ENABLE 0x0104 | |
80 | #define CPMAC_UNICAST_CLEAR 0x0108 | |
81 | #define CPMAC_MAX_LENGTH 0x010c | |
82 | #define CPMAC_BUFFER_OFFSET 0x0110 | |
83 | #define CPMAC_MAC_CONTROL 0x0160 | |
84 | # define MAC_TXPTYPE 0x00000200 | |
85 | # define MAC_TXPACE 0x00000040 | |
86 | # define MAC_MII 0x00000020 | |
87 | # define MAC_TXFLOW 0x00000010 | |
88 | # define MAC_RXFLOW 0x00000008 | |
89 | # define MAC_MTEST 0x00000004 | |
90 | # define MAC_LOOPBACK 0x00000002 | |
91 | # define MAC_FDX 0x00000001 | |
92 | #define CPMAC_MAC_STATUS 0x0164 | |
93 | # define MAC_STATUS_QOS 0x00000004 | |
94 | # define MAC_STATUS_RXFLOW 0x00000002 | |
95 | # define MAC_STATUS_TXFLOW 0x00000001 | |
96 | #define CPMAC_TX_INT_ENABLE 0x0178 | |
97 | #define CPMAC_TX_INT_CLEAR 0x017c | |
98 | #define CPMAC_MAC_INT_VECTOR 0x0180 | |
99 | # define MAC_INT_STATUS 0x00080000 | |
100 | # define MAC_INT_HOST 0x00040000 | |
101 | # define MAC_INT_RX 0x00020000 | |
102 | # define MAC_INT_TX 0x00010000 | |
103 | #define CPMAC_MAC_EOI_VECTOR 0x0184 | |
104 | #define CPMAC_RX_INT_ENABLE 0x0198 | |
105 | #define CPMAC_RX_INT_CLEAR 0x019c | |
106 | #define CPMAC_MAC_INT_ENABLE 0x01a8 | |
107 | #define CPMAC_MAC_INT_CLEAR 0x01ac | |
108 | #define CPMAC_MAC_ADDR_LO(channel) (0x01b0 + (channel) * 4) | |
109 | #define CPMAC_MAC_ADDR_MID 0x01d0 | |
110 | #define CPMAC_MAC_ADDR_HI 0x01d4 | |
111 | #define CPMAC_MAC_HASH_LO 0x01d8 | |
112 | #define CPMAC_MAC_HASH_HI 0x01dc | |
113 | #define CPMAC_TX_PTR(channel) (0x0600 + (channel) * 4) | |
114 | #define CPMAC_RX_PTR(channel) (0x0620 + (channel) * 4) | |
115 | #define CPMAC_TX_ACK(channel) (0x0640 + (channel) * 4) | |
116 | #define CPMAC_RX_ACK(channel) (0x0660 + (channel) * 4) | |
117 | #define CPMAC_REG_END 0x0680 | |
118 | /* | |
119 | * Rx/Tx statistics | |
120 | * TODO: use some of them to fill stats in cpmac_stats() | |
121 | */ | |
122 | #define CPMAC_STATS_RX_GOOD 0x0200 | |
123 | #define CPMAC_STATS_RX_BCAST 0x0204 | |
124 | #define CPMAC_STATS_RX_MCAST 0x0208 | |
125 | #define CPMAC_STATS_RX_PAUSE 0x020c | |
126 | #define CPMAC_STATS_RX_CRC 0x0210 | |
127 | #define CPMAC_STATS_RX_ALIGN 0x0214 | |
128 | #define CPMAC_STATS_RX_OVER 0x0218 | |
129 | #define CPMAC_STATS_RX_JABBER 0x021c | |
130 | #define CPMAC_STATS_RX_UNDER 0x0220 | |
131 | #define CPMAC_STATS_RX_FRAG 0x0224 | |
132 | #define CPMAC_STATS_RX_FILTER 0x0228 | |
133 | #define CPMAC_STATS_RX_QOSFILTER 0x022c | |
134 | #define CPMAC_STATS_RX_OCTETS 0x0230 | |
135 | ||
136 | #define CPMAC_STATS_TX_GOOD 0x0234 | |
137 | #define CPMAC_STATS_TX_BCAST 0x0238 | |
138 | #define CPMAC_STATS_TX_MCAST 0x023c | |
139 | #define CPMAC_STATS_TX_PAUSE 0x0240 | |
140 | #define CPMAC_STATS_TX_DEFER 0x0244 | |
141 | #define CPMAC_STATS_TX_COLLISION 0x0248 | |
142 | #define CPMAC_STATS_TX_SINGLECOLL 0x024c | |
143 | #define CPMAC_STATS_TX_MULTICOLL 0x0250 | |
144 | #define CPMAC_STATS_TX_EXCESSCOLL 0x0254 | |
145 | #define CPMAC_STATS_TX_LATECOLL 0x0258 | |
146 | #define CPMAC_STATS_TX_UNDERRUN 0x025c | |
147 | #define CPMAC_STATS_TX_CARRIERSENSE 0x0260 | |
148 | #define CPMAC_STATS_TX_OCTETS 0x0264 | |
149 | ||
150 | #define cpmac_read(base, reg) (readl((void __iomem *)(base) + (reg))) | |
151 | #define cpmac_write(base, reg, val) (writel(val, (void __iomem *)(base) + \ | |
152 | (reg))) | |
153 | ||
154 | /* MDIO bus */ | |
155 | #define CPMAC_MDIO_VERSION 0x0000 | |
156 | #define CPMAC_MDIO_CONTROL 0x0004 | |
157 | # define MDIOC_IDLE 0x80000000 | |
158 | # define MDIOC_ENABLE 0x40000000 | |
159 | # define MDIOC_PREAMBLE 0x00100000 | |
160 | # define MDIOC_FAULT 0x00080000 | |
161 | # define MDIOC_FAULTDETECT 0x00040000 | |
162 | # define MDIOC_INTTEST 0x00020000 | |
163 | # define MDIOC_CLKDIV(div) ((div) & 0xff) | |
164 | #define CPMAC_MDIO_ALIVE 0x0008 | |
165 | #define CPMAC_MDIO_LINK 0x000c | |
166 | #define CPMAC_MDIO_ACCESS(channel) (0x0080 + (channel) * 8) | |
167 | # define MDIO_BUSY 0x80000000 | |
168 | # define MDIO_WRITE 0x40000000 | |
169 | # define MDIO_REG(reg) (((reg) & 0x1f) << 21) | |
170 | # define MDIO_PHY(phy) (((phy) & 0x1f) << 16) | |
171 | # define MDIO_DATA(data) ((data) & 0xffff) | |
172 | #define CPMAC_MDIO_PHYSEL(channel) (0x0084 + (channel) * 8) | |
173 | # define PHYSEL_LINKSEL 0x00000040 | |
174 | # define PHYSEL_LINKINT 0x00000020 | |
175 | ||
176 | struct cpmac_desc { | |
177 | u32 hw_next; | |
178 | u32 hw_data; | |
179 | u16 buflen; | |
180 | u16 bufflags; | |
181 | u16 datalen; | |
182 | u16 dataflags; | |
183 | #define CPMAC_SOP 0x8000 | |
184 | #define CPMAC_EOP 0x4000 | |
185 | #define CPMAC_OWN 0x2000 | |
186 | #define CPMAC_EOQ 0x1000 | |
187 | struct sk_buff *skb; | |
188 | struct cpmac_desc *next; | |
189 | dma_addr_t mapping; | |
190 | dma_addr_t data_mapping; | |
191 | }; | |
192 | ||
193 | struct cpmac_priv { | |
194 | spinlock_t lock; | |
195 | spinlock_t rx_lock; | |
196 | struct cpmac_desc *rx_head; | |
197 | int ring_size; | |
198 | struct cpmac_desc *desc_ring; | |
199 | dma_addr_t dma_ring; | |
200 | void __iomem *regs; | |
201 | struct mii_bus *mii_bus; | |
202 | struct phy_device *phy; | |
203 | char phy_name[BUS_ID_SIZE]; | |
204 | int oldlink, oldspeed, oldduplex; | |
205 | u32 msg_enable; | |
206 | struct net_device *dev; | |
207 | struct work_struct reset_work; | |
208 | struct platform_device *pdev; | |
67d129d1 | 209 | struct napi_struct napi; |
d95b39c3 MC |
210 | }; |
211 | ||
212 | static irqreturn_t cpmac_irq(int, void *); | |
213 | static void cpmac_hw_start(struct net_device *dev); | |
214 | static void cpmac_hw_stop(struct net_device *dev); | |
215 | static int cpmac_stop(struct net_device *dev); | |
216 | static int cpmac_open(struct net_device *dev); | |
217 | ||
218 | static void cpmac_dump_regs(struct net_device *dev) | |
219 | { | |
220 | int i; | |
221 | struct cpmac_priv *priv = netdev_priv(dev); | |
222 | for (i = 0; i < CPMAC_REG_END; i += 4) { | |
223 | if (i % 16 == 0) { | |
224 | if (i) | |
225 | printk("\n"); | |
226 | printk(KERN_DEBUG "%s: reg[%p]:", dev->name, | |
227 | priv->regs + i); | |
228 | } | |
229 | printk(" %08x", cpmac_read(priv->regs, i)); | |
230 | } | |
231 | printk("\n"); | |
232 | } | |
233 | ||
234 | static void cpmac_dump_desc(struct net_device *dev, struct cpmac_desc *desc) | |
235 | { | |
236 | int i; | |
237 | printk(KERN_DEBUG "%s: desc[%p]:", dev->name, desc); | |
238 | for (i = 0; i < sizeof(*desc) / 4; i++) | |
239 | printk(" %08x", ((u32 *)desc)[i]); | |
240 | printk("\n"); | |
241 | } | |
242 | ||
243 | static void cpmac_dump_skb(struct net_device *dev, struct sk_buff *skb) | |
244 | { | |
245 | int i; | |
246 | printk(KERN_DEBUG "%s: skb 0x%p, len=%d\n", dev->name, skb, skb->len); | |
247 | for (i = 0; i < skb->len; i++) { | |
248 | if (i % 16 == 0) { | |
249 | if (i) | |
250 | printk("\n"); | |
251 | printk(KERN_DEBUG "%s: data[%p]:", dev->name, | |
252 | skb->data + i); | |
253 | } | |
254 | printk(" %02x", ((u8 *)skb->data)[i]); | |
255 | } | |
256 | printk("\n"); | |
257 | } | |
258 | ||
259 | static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int reg) | |
260 | { | |
261 | u32 val; | |
262 | ||
263 | while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY) | |
264 | cpu_relax(); | |
265 | cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_REG(reg) | | |
266 | MDIO_PHY(phy_id)); | |
267 | while ((val = cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0))) & MDIO_BUSY) | |
268 | cpu_relax(); | |
269 | return MDIO_DATA(val); | |
270 | } | |
271 | ||
272 | static int cpmac_mdio_write(struct mii_bus *bus, int phy_id, | |
273 | int reg, u16 val) | |
274 | { | |
275 | while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY) | |
276 | cpu_relax(); | |
277 | cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_WRITE | | |
278 | MDIO_REG(reg) | MDIO_PHY(phy_id) | MDIO_DATA(val)); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static int cpmac_mdio_reset(struct mii_bus *bus) | |
283 | { | |
284 | ar7_device_reset(AR7_RESET_BIT_MDIO); | |
285 | cpmac_write(bus->priv, CPMAC_MDIO_CONTROL, MDIOC_ENABLE | | |
286 | MDIOC_CLKDIV(ar7_cpmac_freq() / 2200000 - 1)); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, }; | |
291 | ||
292 | static struct mii_bus cpmac_mii = { | |
293 | .name = "cpmac-mii", | |
294 | .read = cpmac_mdio_read, | |
295 | .write = cpmac_mdio_write, | |
296 | .reset = cpmac_mdio_reset, | |
297 | .irq = mii_irqs, | |
298 | }; | |
299 | ||
300 | static int cpmac_config(struct net_device *dev, struct ifmap *map) | |
301 | { | |
302 | if (dev->flags & IFF_UP) | |
303 | return -EBUSY; | |
304 | ||
305 | /* Don't allow changing the I/O address */ | |
306 | if (map->base_addr != dev->base_addr) | |
307 | return -EOPNOTSUPP; | |
308 | ||
309 | /* ignore other fields */ | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static void cpmac_set_multicast_list(struct net_device *dev) | |
314 | { | |
315 | struct dev_mc_list *iter; | |
316 | int i; | |
317 | u8 tmp; | |
318 | u32 mbp, bit, hash[2] = { 0, }; | |
319 | struct cpmac_priv *priv = netdev_priv(dev); | |
320 | ||
321 | mbp = cpmac_read(priv->regs, CPMAC_MBP); | |
322 | if (dev->flags & IFF_PROMISC) { | |
323 | cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) | | |
324 | MBP_RXPROMISC); | |
325 | } else { | |
326 | cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC); | |
327 | if (dev->flags & IFF_ALLMULTI) { | |
328 | /* enable all multicast mode */ | |
329 | cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff); | |
330 | cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff); | |
331 | } else { | |
332 | /* | |
333 | * cpmac uses some strange mac address hashing | |
334 | * (not crc32) | |
335 | */ | |
336 | for (i = 0, iter = dev->mc_list; i < dev->mc_count; | |
337 | i++, iter = iter->next) { | |
338 | bit = 0; | |
339 | tmp = iter->dmi_addr[0]; | |
340 | bit ^= (tmp >> 2) ^ (tmp << 4); | |
341 | tmp = iter->dmi_addr[1]; | |
342 | bit ^= (tmp >> 4) ^ (tmp << 2); | |
343 | tmp = iter->dmi_addr[2]; | |
344 | bit ^= (tmp >> 6) ^ tmp; | |
345 | tmp = iter->dmi_addr[3]; | |
346 | bit ^= (tmp >> 2) ^ (tmp << 4); | |
347 | tmp = iter->dmi_addr[4]; | |
348 | bit ^= (tmp >> 4) ^ (tmp << 2); | |
349 | tmp = iter->dmi_addr[5]; | |
350 | bit ^= (tmp >> 6) ^ tmp; | |
351 | bit &= 0x3f; | |
352 | hash[bit / 32] |= 1 << (bit % 32); | |
353 | } | |
354 | ||
355 | cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]); | |
356 | cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]); | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
67d129d1 | 361 | static struct sk_buff *cpmac_rx_one(struct cpmac_priv *priv, |
d95b39c3 MC |
362 | struct cpmac_desc *desc) |
363 | { | |
364 | struct sk_buff *skb, *result = NULL; | |
365 | ||
366 | if (unlikely(netif_msg_hw(priv))) | |
67d129d1 | 367 | cpmac_dump_desc(priv->dev, desc); |
d95b39c3 MC |
368 | cpmac_write(priv->regs, CPMAC_RX_ACK(0), (u32)desc->mapping); |
369 | if (unlikely(!desc->datalen)) { | |
370 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
371 | printk(KERN_WARNING "%s: rx: spurious interrupt\n", | |
67d129d1 | 372 | priv->dev->name); |
d95b39c3 MC |
373 | return NULL; |
374 | } | |
375 | ||
67d129d1 | 376 | skb = netdev_alloc_skb(priv->dev, CPMAC_SKB_SIZE); |
d95b39c3 MC |
377 | if (likely(skb)) { |
378 | skb_reserve(skb, 2); | |
379 | skb_put(desc->skb, desc->datalen); | |
67d129d1 | 380 | desc->skb->protocol = eth_type_trans(desc->skb, priv->dev); |
d95b39c3 | 381 | desc->skb->ip_summed = CHECKSUM_NONE; |
67d129d1 EK |
382 | priv->dev->stats.rx_packets++; |
383 | priv->dev->stats.rx_bytes += desc->datalen; | |
d95b39c3 | 384 | result = desc->skb; |
67d129d1 EK |
385 | dma_unmap_single(&priv->dev->dev, desc->data_mapping, |
386 | CPMAC_SKB_SIZE, DMA_FROM_DEVICE); | |
d95b39c3 | 387 | desc->skb = skb; |
67d129d1 | 388 | desc->data_mapping = dma_map_single(&priv->dev->dev, skb->data, |
d95b39c3 MC |
389 | CPMAC_SKB_SIZE, |
390 | DMA_FROM_DEVICE); | |
391 | desc->hw_data = (u32)desc->data_mapping; | |
392 | if (unlikely(netif_msg_pktdata(priv))) { | |
67d129d1 EK |
393 | printk(KERN_DEBUG "%s: received packet:\n", |
394 | priv->dev->name); | |
395 | cpmac_dump_skb(priv->dev, result); | |
d95b39c3 MC |
396 | } |
397 | } else { | |
398 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
399 | printk(KERN_WARNING | |
67d129d1 EK |
400 | "%s: low on skbs, dropping packet\n", |
401 | priv->dev->name); | |
402 | priv->dev->stats.rx_dropped++; | |
d95b39c3 MC |
403 | } |
404 | ||
405 | desc->buflen = CPMAC_SKB_SIZE; | |
406 | desc->dataflags = CPMAC_OWN; | |
407 | ||
408 | return result; | |
409 | } | |
410 | ||
67d129d1 | 411 | static int cpmac_poll(struct napi_struct *napi, int budget) |
d95b39c3 MC |
412 | { |
413 | struct sk_buff *skb; | |
414 | struct cpmac_desc *desc; | |
67d129d1 EK |
415 | int received = 0; |
416 | struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi); | |
d95b39c3 MC |
417 | |
418 | spin_lock(&priv->rx_lock); | |
419 | if (unlikely(!priv->rx_head)) { | |
420 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
421 | printk(KERN_WARNING "%s: rx: polling, but no queue\n", | |
67d129d1 EK |
422 | priv->dev->name); |
423 | netif_rx_complete(priv->dev, napi); | |
d95b39c3 MC |
424 | return 0; |
425 | } | |
426 | ||
427 | desc = priv->rx_head; | |
67d129d1 EK |
428 | while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) { |
429 | skb = cpmac_rx_one(priv, desc); | |
d95b39c3 MC |
430 | if (likely(skb)) { |
431 | netif_receive_skb(skb); | |
432 | received++; | |
433 | } | |
434 | desc = desc->next; | |
435 | } | |
436 | ||
437 | priv->rx_head = desc; | |
438 | spin_unlock(&priv->rx_lock); | |
d95b39c3 | 439 | if (unlikely(netif_msg_rx_status(priv))) |
67d129d1 EK |
440 | printk(KERN_DEBUG "%s: poll processed %d packets\n", |
441 | priv->dev->name, received); | |
d95b39c3 | 442 | if (desc->dataflags & CPMAC_OWN) { |
67d129d1 | 443 | netif_rx_complete(priv->dev, napi); |
d95b39c3 MC |
444 | cpmac_write(priv->regs, CPMAC_RX_PTR(0), (u32)desc->mapping); |
445 | cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | return 1; | |
450 | } | |
451 | ||
452 | static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
453 | { | |
454 | int queue, len; | |
455 | struct cpmac_desc *desc; | |
456 | struct cpmac_priv *priv = netdev_priv(dev); | |
457 | ||
6cd043d9 MC |
458 | if (unlikely(skb_padto(skb, ETH_ZLEN))) |
459 | return NETDEV_TX_OK; | |
d95b39c3 MC |
460 | |
461 | len = max(skb->len, ETH_ZLEN); | |
6cd043d9 | 462 | queue = skb->queue_mapping; |
d95b39c3 MC |
463 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
464 | netif_stop_subqueue(dev, queue); | |
465 | #else | |
466 | netif_stop_queue(dev); | |
467 | #endif | |
468 | ||
469 | desc = &priv->desc_ring[queue]; | |
470 | if (unlikely(desc->dataflags & CPMAC_OWN)) { | |
471 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
6cd043d9 | 472 | printk(KERN_WARNING "%s: tx dma ring full\n", |
d95b39c3 | 473 | dev->name); |
6cd043d9 | 474 | return NETDEV_TX_BUSY; |
d95b39c3 MC |
475 | } |
476 | ||
477 | spin_lock(&priv->lock); | |
478 | dev->trans_start = jiffies; | |
479 | spin_unlock(&priv->lock); | |
480 | desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN; | |
481 | desc->skb = skb; | |
482 | desc->data_mapping = dma_map_single(&dev->dev, skb->data, len, | |
483 | DMA_TO_DEVICE); | |
484 | desc->hw_data = (u32)desc->data_mapping; | |
485 | desc->datalen = len; | |
486 | desc->buflen = len; | |
487 | if (unlikely(netif_msg_tx_queued(priv))) | |
488 | printk(KERN_DEBUG "%s: sending 0x%p, len=%d\n", dev->name, skb, | |
489 | skb->len); | |
490 | if (unlikely(netif_msg_hw(priv))) | |
491 | cpmac_dump_desc(dev, desc); | |
492 | if (unlikely(netif_msg_pktdata(priv))) | |
493 | cpmac_dump_skb(dev, skb); | |
494 | cpmac_write(priv->regs, CPMAC_TX_PTR(queue), (u32)desc->mapping); | |
495 | ||
6cd043d9 | 496 | return NETDEV_TX_OK; |
d95b39c3 MC |
497 | } |
498 | ||
499 | static void cpmac_end_xmit(struct net_device *dev, int queue) | |
500 | { | |
501 | struct cpmac_desc *desc; | |
502 | struct cpmac_priv *priv = netdev_priv(dev); | |
503 | ||
504 | desc = &priv->desc_ring[queue]; | |
505 | cpmac_write(priv->regs, CPMAC_TX_ACK(queue), (u32)desc->mapping); | |
506 | if (likely(desc->skb)) { | |
507 | spin_lock(&priv->lock); | |
508 | dev->stats.tx_packets++; | |
509 | dev->stats.tx_bytes += desc->skb->len; | |
510 | spin_unlock(&priv->lock); | |
511 | dma_unmap_single(&dev->dev, desc->data_mapping, desc->skb->len, | |
512 | DMA_TO_DEVICE); | |
513 | ||
514 | if (unlikely(netif_msg_tx_done(priv))) | |
515 | printk(KERN_DEBUG "%s: sent 0x%p, len=%d\n", dev->name, | |
516 | desc->skb, desc->skb->len); | |
517 | ||
518 | dev_kfree_skb_irq(desc->skb); | |
519 | desc->skb = NULL; | |
520 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
521 | if (netif_subqueue_stopped(dev, queue)) | |
522 | netif_wake_subqueue(dev, queue); | |
523 | #else | |
524 | if (netif_queue_stopped(dev)) | |
525 | netif_wake_queue(dev); | |
526 | #endif | |
527 | } else { | |
528 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
529 | printk(KERN_WARNING | |
530 | "%s: end_xmit: spurious interrupt\n", dev->name); | |
531 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
532 | if (netif_subqueue_stopped(dev, queue)) | |
533 | netif_wake_subqueue(dev, queue); | |
534 | #else | |
535 | if (netif_queue_stopped(dev)) | |
536 | netif_wake_queue(dev); | |
537 | #endif | |
538 | } | |
539 | } | |
540 | ||
541 | static void cpmac_hw_stop(struct net_device *dev) | |
542 | { | |
543 | int i; | |
544 | struct cpmac_priv *priv = netdev_priv(dev); | |
545 | struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data; | |
546 | ||
547 | ar7_device_reset(pdata->reset_bit); | |
548 | cpmac_write(priv->regs, CPMAC_RX_CONTROL, | |
549 | cpmac_read(priv->regs, CPMAC_RX_CONTROL) & ~1); | |
550 | cpmac_write(priv->regs, CPMAC_TX_CONTROL, | |
551 | cpmac_read(priv->regs, CPMAC_TX_CONTROL) & ~1); | |
552 | for (i = 0; i < 8; i++) { | |
553 | cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); | |
554 | cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0); | |
555 | } | |
556 | cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff); | |
557 | cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff); | |
558 | cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff); | |
559 | cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); | |
560 | cpmac_write(priv->regs, CPMAC_MAC_CONTROL, | |
561 | cpmac_read(priv->regs, CPMAC_MAC_CONTROL) & ~MAC_MII); | |
562 | } | |
563 | ||
564 | static void cpmac_hw_start(struct net_device *dev) | |
565 | { | |
566 | int i; | |
567 | struct cpmac_priv *priv = netdev_priv(dev); | |
568 | struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data; | |
569 | ||
570 | ar7_device_reset(pdata->reset_bit); | |
571 | for (i = 0; i < 8; i++) { | |
572 | cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); | |
573 | cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0); | |
574 | } | |
575 | cpmac_write(priv->regs, CPMAC_RX_PTR(0), priv->rx_head->mapping); | |
576 | ||
577 | cpmac_write(priv->regs, CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST | | |
578 | MBP_RXMCAST); | |
579 | cpmac_write(priv->regs, CPMAC_BUFFER_OFFSET, 0); | |
580 | for (i = 0; i < 8; i++) | |
581 | cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]); | |
582 | cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]); | |
583 | cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] | | |
584 | (dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) | | |
585 | (dev->dev_addr[3] << 24)); | |
586 | cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE); | |
587 | cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff); | |
588 | cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff); | |
589 | cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff); | |
590 | cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); | |
591 | cpmac_write(priv->regs, CPMAC_UNICAST_ENABLE, 1); | |
592 | cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1); | |
593 | cpmac_write(priv->regs, CPMAC_TX_INT_ENABLE, 0xff); | |
594 | cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3); | |
595 | ||
596 | cpmac_write(priv->regs, CPMAC_RX_CONTROL, | |
597 | cpmac_read(priv->regs, CPMAC_RX_CONTROL) | 1); | |
598 | cpmac_write(priv->regs, CPMAC_TX_CONTROL, | |
599 | cpmac_read(priv->regs, CPMAC_TX_CONTROL) | 1); | |
600 | cpmac_write(priv->regs, CPMAC_MAC_CONTROL, | |
601 | cpmac_read(priv->regs, CPMAC_MAC_CONTROL) | MAC_MII | | |
602 | MAC_FDX); | |
603 | } | |
604 | ||
605 | static void cpmac_clear_rx(struct net_device *dev) | |
606 | { | |
607 | struct cpmac_priv *priv = netdev_priv(dev); | |
608 | struct cpmac_desc *desc; | |
609 | int i; | |
610 | if (unlikely(!priv->rx_head)) | |
611 | return; | |
612 | desc = priv->rx_head; | |
613 | for (i = 0; i < priv->ring_size; i++) { | |
614 | if ((desc->dataflags & CPMAC_OWN) == 0) { | |
615 | if (netif_msg_rx_err(priv) && net_ratelimit()) | |
616 | printk(KERN_WARNING "%s: packet dropped\n", | |
617 | dev->name); | |
618 | if (unlikely(netif_msg_hw(priv))) | |
619 | cpmac_dump_desc(dev, desc); | |
620 | desc->dataflags = CPMAC_OWN; | |
621 | dev->stats.rx_dropped++; | |
622 | } | |
623 | desc = desc->next; | |
624 | } | |
625 | } | |
626 | ||
627 | static void cpmac_clear_tx(struct net_device *dev) | |
628 | { | |
629 | struct cpmac_priv *priv = netdev_priv(dev); | |
630 | int i; | |
631 | if (unlikely(!priv->desc_ring)) | |
632 | return; | |
6cd043d9 MC |
633 | for (i = 0; i < CPMAC_QUEUES; i++) { |
634 | priv->desc_ring[i].dataflags = 0; | |
d95b39c3 MC |
635 | if (priv->desc_ring[i].skb) { |
636 | dev_kfree_skb_any(priv->desc_ring[i].skb); | |
637 | if (netif_subqueue_stopped(dev, i)) | |
638 | netif_wake_subqueue(dev, i); | |
639 | } | |
6cd043d9 | 640 | } |
d95b39c3 MC |
641 | } |
642 | ||
643 | static void cpmac_hw_error(struct work_struct *work) | |
644 | { | |
645 | struct cpmac_priv *priv = | |
646 | container_of(work, struct cpmac_priv, reset_work); | |
647 | ||
648 | spin_lock(&priv->rx_lock); | |
649 | cpmac_clear_rx(priv->dev); | |
650 | spin_unlock(&priv->rx_lock); | |
651 | cpmac_clear_tx(priv->dev); | |
652 | cpmac_hw_start(priv->dev); | |
67d129d1 | 653 | napi_enable(&priv->napi); |
d95b39c3 MC |
654 | netif_start_queue(priv->dev); |
655 | } | |
656 | ||
657 | static irqreturn_t cpmac_irq(int irq, void *dev_id) | |
658 | { | |
659 | struct net_device *dev = dev_id; | |
660 | struct cpmac_priv *priv; | |
661 | int queue; | |
662 | u32 status; | |
663 | ||
664 | if (!dev) | |
665 | return IRQ_NONE; | |
666 | ||
667 | priv = netdev_priv(dev); | |
668 | ||
669 | status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR); | |
670 | ||
671 | if (unlikely(netif_msg_intr(priv))) | |
672 | printk(KERN_DEBUG "%s: interrupt status: 0x%08x\n", dev->name, | |
673 | status); | |
674 | ||
675 | if (status & MAC_INT_TX) | |
676 | cpmac_end_xmit(dev, (status & 7)); | |
677 | ||
678 | if (status & MAC_INT_RX) { | |
679 | queue = (status >> 8) & 7; | |
67d129d1 EK |
680 | if (netif_rx_schedule_prep(dev, &priv->napi)) { |
681 | cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue); | |
682 | __netif_rx_schedule(dev, &priv->napi); | |
683 | } | |
d95b39c3 MC |
684 | } |
685 | ||
686 | cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0); | |
687 | ||
688 | if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) { | |
689 | if (netif_msg_drv(priv) && net_ratelimit()) | |
690 | printk(KERN_ERR "%s: hw error, resetting...\n", | |
691 | dev->name); | |
692 | netif_stop_queue(dev); | |
67d129d1 | 693 | napi_disable(&priv->napi); |
d95b39c3 MC |
694 | cpmac_hw_stop(dev); |
695 | schedule_work(&priv->reset_work); | |
696 | if (unlikely(netif_msg_hw(priv))) | |
697 | cpmac_dump_regs(dev); | |
698 | } | |
699 | ||
700 | return IRQ_HANDLED; | |
701 | } | |
702 | ||
703 | static void cpmac_tx_timeout(struct net_device *dev) | |
704 | { | |
705 | struct cpmac_priv *priv = netdev_priv(dev); | |
706 | int i; | |
707 | ||
708 | spin_lock(&priv->lock); | |
709 | dev->stats.tx_errors++; | |
710 | spin_unlock(&priv->lock); | |
711 | if (netif_msg_tx_err(priv) && net_ratelimit()) | |
712 | printk(KERN_WARNING "%s: transmit timeout\n", dev->name); | |
713 | /* | |
714 | * FIXME: waking up random queue is not the best thing to | |
715 | * do... on the other hand why we got here at all? | |
716 | */ | |
717 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
718 | for (i = 0; i < CPMAC_QUEUES; i++) | |
719 | if (priv->desc_ring[i].skb) { | |
6cd043d9 | 720 | priv->desc_ring[i].dataflags = 0; |
d95b39c3 MC |
721 | dev_kfree_skb_any(priv->desc_ring[i].skb); |
722 | netif_wake_subqueue(dev, i); | |
723 | break; | |
724 | } | |
725 | #else | |
6cd043d9 | 726 | priv->desc_ring[0].dataflags = 0; |
d95b39c3 MC |
727 | if (priv->desc_ring[0].skb) |
728 | dev_kfree_skb_any(priv->desc_ring[0].skb); | |
729 | netif_wake_queue(dev); | |
730 | #endif | |
731 | } | |
732 | ||
733 | static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
734 | { | |
735 | struct cpmac_priv *priv = netdev_priv(dev); | |
736 | if (!(netif_running(dev))) | |
737 | return -EINVAL; | |
738 | if (!priv->phy) | |
739 | return -EINVAL; | |
740 | if ((cmd == SIOCGMIIPHY) || (cmd == SIOCGMIIREG) || | |
741 | (cmd == SIOCSMIIREG)) | |
742 | return phy_mii_ioctl(priv->phy, if_mii(ifr), cmd); | |
743 | ||
744 | return -EOPNOTSUPP; | |
745 | } | |
746 | ||
747 | static int cpmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
748 | { | |
749 | struct cpmac_priv *priv = netdev_priv(dev); | |
750 | ||
751 | if (priv->phy) | |
752 | return phy_ethtool_gset(priv->phy, cmd); | |
753 | ||
754 | return -EINVAL; | |
755 | } | |
756 | ||
757 | static int cpmac_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
758 | { | |
759 | struct cpmac_priv *priv = netdev_priv(dev); | |
760 | ||
761 | if (!capable(CAP_NET_ADMIN)) | |
762 | return -EPERM; | |
763 | ||
764 | if (priv->phy) | |
765 | return phy_ethtool_sset(priv->phy, cmd); | |
766 | ||
767 | return -EINVAL; | |
768 | } | |
769 | ||
770 | static void cpmac_get_ringparam(struct net_device *dev, struct ethtool_ringparam* ring) | |
771 | { | |
772 | struct cpmac_priv *priv = netdev_priv(dev); | |
773 | ||
774 | ring->rx_max_pending = 1024; | |
775 | ring->rx_mini_max_pending = 1; | |
776 | ring->rx_jumbo_max_pending = 1; | |
777 | ring->tx_max_pending = 1; | |
778 | ||
779 | ring->rx_pending = priv->ring_size; | |
780 | ring->rx_mini_pending = 1; | |
781 | ring->rx_jumbo_pending = 1; | |
782 | ring->tx_pending = 1; | |
783 | } | |
784 | ||
785 | static int cpmac_set_ringparam(struct net_device *dev, struct ethtool_ringparam* ring) | |
786 | { | |
787 | struct cpmac_priv *priv = netdev_priv(dev); | |
788 | ||
6cd043d9 | 789 | if (netif_running(dev)) |
d95b39c3 MC |
790 | return -EBUSY; |
791 | priv->ring_size = ring->rx_pending; | |
792 | return 0; | |
793 | } | |
794 | ||
795 | static void cpmac_get_drvinfo(struct net_device *dev, | |
796 | struct ethtool_drvinfo *info) | |
797 | { | |
798 | strcpy(info->driver, "cpmac"); | |
799 | strcpy(info->version, CPMAC_VERSION); | |
800 | info->fw_version[0] = '\0'; | |
801 | sprintf(info->bus_info, "%s", "cpmac"); | |
802 | info->regdump_len = 0; | |
803 | } | |
804 | ||
805 | static const struct ethtool_ops cpmac_ethtool_ops = { | |
806 | .get_settings = cpmac_get_settings, | |
807 | .set_settings = cpmac_set_settings, | |
808 | .get_drvinfo = cpmac_get_drvinfo, | |
809 | .get_link = ethtool_op_get_link, | |
810 | .get_ringparam = cpmac_get_ringparam, | |
811 | .set_ringparam = cpmac_set_ringparam, | |
812 | }; | |
813 | ||
814 | static void cpmac_adjust_link(struct net_device *dev) | |
815 | { | |
816 | struct cpmac_priv *priv = netdev_priv(dev); | |
817 | int new_state = 0; | |
818 | ||
819 | spin_lock(&priv->lock); | |
820 | if (priv->phy->link) { | |
821 | netif_start_queue(dev); | |
822 | if (priv->phy->duplex != priv->oldduplex) { | |
823 | new_state = 1; | |
824 | priv->oldduplex = priv->phy->duplex; | |
825 | } | |
826 | ||
827 | if (priv->phy->speed != priv->oldspeed) { | |
828 | new_state = 1; | |
829 | priv->oldspeed = priv->phy->speed; | |
830 | } | |
831 | ||
832 | if (!priv->oldlink) { | |
833 | new_state = 1; | |
834 | priv->oldlink = 1; | |
835 | netif_schedule(dev); | |
836 | } | |
837 | } else if (priv->oldlink) { | |
838 | netif_stop_queue(dev); | |
839 | new_state = 1; | |
840 | priv->oldlink = 0; | |
841 | priv->oldspeed = 0; | |
842 | priv->oldduplex = -1; | |
843 | } | |
844 | ||
845 | if (new_state && netif_msg_link(priv) && net_ratelimit()) | |
846 | phy_print_status(priv->phy); | |
847 | ||
848 | spin_unlock(&priv->lock); | |
849 | } | |
850 | ||
b88219f8 EK |
851 | static int cpmac_link_update(struct net_device *dev, |
852 | struct fixed_phy_status *status) | |
853 | { | |
854 | status->link = 1; | |
855 | status->speed = 100; | |
856 | status->duplex = 1; | |
857 | return 0; | |
858 | } | |
859 | ||
d95b39c3 MC |
860 | static int cpmac_open(struct net_device *dev) |
861 | { | |
862 | int i, size, res; | |
863 | struct cpmac_priv *priv = netdev_priv(dev); | |
864 | struct resource *mem; | |
865 | struct cpmac_desc *desc; | |
866 | struct sk_buff *skb; | |
867 | ||
d95b39c3 MC |
868 | mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs"); |
869 | if (!request_mem_region(mem->start, mem->end - mem->start, dev->name)) { | |
870 | if (netif_msg_drv(priv)) | |
871 | printk(KERN_ERR "%s: failed to request registers\n", | |
872 | dev->name); | |
873 | res = -ENXIO; | |
874 | goto fail_reserve; | |
875 | } | |
876 | ||
877 | priv->regs = ioremap(mem->start, mem->end - mem->start); | |
878 | if (!priv->regs) { | |
879 | if (netif_msg_drv(priv)) | |
880 | printk(KERN_ERR "%s: failed to remap registers\n", | |
881 | dev->name); | |
882 | res = -ENXIO; | |
883 | goto fail_remap; | |
884 | } | |
885 | ||
886 | size = priv->ring_size + CPMAC_QUEUES; | |
887 | priv->desc_ring = dma_alloc_coherent(&dev->dev, | |
888 | sizeof(struct cpmac_desc) * size, | |
889 | &priv->dma_ring, | |
890 | GFP_KERNEL); | |
891 | if (!priv->desc_ring) { | |
892 | res = -ENOMEM; | |
893 | goto fail_alloc; | |
894 | } | |
895 | ||
896 | for (i = 0; i < size; i++) | |
897 | priv->desc_ring[i].mapping = priv->dma_ring + sizeof(*desc) * i; | |
898 | ||
899 | priv->rx_head = &priv->desc_ring[CPMAC_QUEUES]; | |
900 | for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) { | |
901 | skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE); | |
902 | if (unlikely(!skb)) { | |
903 | res = -ENOMEM; | |
904 | goto fail_desc; | |
905 | } | |
906 | skb_reserve(skb, 2); | |
907 | desc->skb = skb; | |
908 | desc->data_mapping = dma_map_single(&dev->dev, skb->data, | |
909 | CPMAC_SKB_SIZE, | |
910 | DMA_FROM_DEVICE); | |
911 | desc->hw_data = (u32)desc->data_mapping; | |
912 | desc->buflen = CPMAC_SKB_SIZE; | |
913 | desc->dataflags = CPMAC_OWN; | |
914 | desc->next = &priv->rx_head[(i + 1) % priv->ring_size]; | |
915 | desc->hw_next = (u32)desc->next->mapping; | |
916 | } | |
917 | ||
918 | if ((res = request_irq(dev->irq, cpmac_irq, IRQF_SHARED, | |
919 | dev->name, dev))) { | |
920 | if (netif_msg_drv(priv)) | |
921 | printk(KERN_ERR "%s: failed to obtain irq\n", | |
922 | dev->name); | |
923 | goto fail_irq; | |
924 | } | |
925 | ||
926 | INIT_WORK(&priv->reset_work, cpmac_hw_error); | |
927 | cpmac_hw_start(dev); | |
928 | ||
67d129d1 | 929 | napi_enable(&priv->napi); |
d95b39c3 MC |
930 | priv->phy->state = PHY_CHANGELINK; |
931 | phy_start(priv->phy); | |
932 | ||
933 | return 0; | |
934 | ||
935 | fail_irq: | |
936 | fail_desc: | |
937 | for (i = 0; i < priv->ring_size; i++) { | |
938 | if (priv->rx_head[i].skb) { | |
939 | dma_unmap_single(&dev->dev, | |
940 | priv->rx_head[i].data_mapping, | |
941 | CPMAC_SKB_SIZE, | |
942 | DMA_FROM_DEVICE); | |
943 | kfree_skb(priv->rx_head[i].skb); | |
944 | } | |
945 | } | |
946 | fail_alloc: | |
947 | kfree(priv->desc_ring); | |
948 | iounmap(priv->regs); | |
949 | ||
950 | fail_remap: | |
951 | release_mem_region(mem->start, mem->end - mem->start); | |
952 | ||
953 | fail_reserve: | |
d95b39c3 MC |
954 | return res; |
955 | } | |
956 | ||
957 | static int cpmac_stop(struct net_device *dev) | |
958 | { | |
959 | int i; | |
960 | struct cpmac_priv *priv = netdev_priv(dev); | |
961 | struct resource *mem; | |
962 | ||
963 | netif_stop_queue(dev); | |
964 | ||
965 | cancel_work_sync(&priv->reset_work); | |
67d129d1 | 966 | napi_disable(&priv->napi); |
d95b39c3 | 967 | phy_stop(priv->phy); |
d95b39c3 MC |
968 | |
969 | cpmac_hw_stop(dev); | |
970 | ||
971 | for (i = 0; i < 8; i++) | |
972 | cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); | |
973 | cpmac_write(priv->regs, CPMAC_RX_PTR(0), 0); | |
974 | cpmac_write(priv->regs, CPMAC_MBP, 0); | |
975 | ||
976 | free_irq(dev->irq, dev); | |
977 | iounmap(priv->regs); | |
978 | mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs"); | |
979 | release_mem_region(mem->start, mem->end - mem->start); | |
980 | priv->rx_head = &priv->desc_ring[CPMAC_QUEUES]; | |
981 | for (i = 0; i < priv->ring_size; i++) { | |
982 | if (priv->rx_head[i].skb) { | |
983 | dma_unmap_single(&dev->dev, | |
984 | priv->rx_head[i].data_mapping, | |
985 | CPMAC_SKB_SIZE, | |
986 | DMA_FROM_DEVICE); | |
987 | kfree_skb(priv->rx_head[i].skb); | |
988 | } | |
989 | } | |
990 | ||
991 | dma_free_coherent(&dev->dev, sizeof(struct cpmac_desc) * | |
992 | (CPMAC_QUEUES + priv->ring_size), | |
993 | priv->desc_ring, priv->dma_ring); | |
994 | return 0; | |
995 | } | |
996 | ||
997 | static int external_switch; | |
998 | ||
999 | static int __devinit cpmac_probe(struct platform_device *pdev) | |
1000 | { | |
b88219f8 | 1001 | int rc, phy_id, i; |
d95b39c3 MC |
1002 | struct resource *mem; |
1003 | struct cpmac_priv *priv; | |
1004 | struct net_device *dev; | |
1005 | struct plat_cpmac_data *pdata; | |
b88219f8 | 1006 | struct fixed_info *fixed_phy; |
df523b5c | 1007 | DECLARE_MAC_BUF(mac); |
d95b39c3 MC |
1008 | |
1009 | pdata = pdev->dev.platform_data; | |
1010 | ||
1011 | for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) { | |
1012 | if (!(pdata->phy_mask & (1 << phy_id))) | |
1013 | continue; | |
1014 | if (!cpmac_mii.phy_map[phy_id]) | |
1015 | continue; | |
1016 | break; | |
1017 | } | |
1018 | ||
1019 | if (phy_id == PHY_MAX_ADDR) { | |
1020 | if (external_switch || dumb_switch) | |
1021 | phy_id = 0; | |
1022 | else { | |
1023 | printk(KERN_ERR "cpmac: no PHY present\n"); | |
1024 | return -ENODEV; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES); | |
1029 | ||
1030 | if (!dev) { | |
1031 | printk(KERN_ERR "cpmac: Unable to allocate net_device\n"); | |
1032 | return -ENOMEM; | |
1033 | } | |
1034 | ||
1035 | platform_set_drvdata(pdev, dev); | |
1036 | priv = netdev_priv(dev); | |
1037 | ||
1038 | priv->pdev = pdev; | |
1039 | mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); | |
1040 | if (!mem) { | |
1041 | rc = -ENODEV; | |
1042 | goto fail; | |
1043 | } | |
1044 | ||
1045 | dev->irq = platform_get_irq_byname(pdev, "irq"); | |
1046 | ||
1047 | dev->open = cpmac_open; | |
1048 | dev->stop = cpmac_stop; | |
1049 | dev->set_config = cpmac_config; | |
1050 | dev->hard_start_xmit = cpmac_start_xmit; | |
1051 | dev->do_ioctl = cpmac_ioctl; | |
1052 | dev->set_multicast_list = cpmac_set_multicast_list; | |
1053 | dev->tx_timeout = cpmac_tx_timeout; | |
1054 | dev->ethtool_ops = &cpmac_ethtool_ops; | |
d95b39c3 MC |
1055 | dev->features |= NETIF_F_MULTI_QUEUE; |
1056 | ||
67d129d1 EK |
1057 | netif_napi_add(dev, &priv->napi, cpmac_poll, 64); |
1058 | ||
d95b39c3 MC |
1059 | spin_lock_init(&priv->lock); |
1060 | spin_lock_init(&priv->rx_lock); | |
1061 | priv->dev = dev; | |
1062 | priv->ring_size = 64; | |
1063 | priv->msg_enable = netif_msg_init(debug_level, 0xff); | |
1064 | memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr)); | |
b88219f8 | 1065 | |
d95b39c3 | 1066 | if (phy_id == 31) { |
b88219f8 EK |
1067 | snprintf(priv->phy_name, BUS_ID_SIZE, PHY_ID_FMT, cpmac_mii.id, |
1068 | phy_id); | |
1069 | } else { | |
1070 | /* Let's try to get a free fixed phy... */ | |
1071 | for (i = 0; i < MAX_PHY_AMNT; i++) { | |
1072 | fixed_phy = fixed_mdio_get_phydev(i); | |
1073 | if (!fixed_phy) | |
1074 | continue; | |
1075 | if (!fixed_phy->phydev->attached_dev) { | |
1076 | strncpy(priv->phy_name, | |
1077 | fixed_phy->phydev->dev.bus_id, | |
1078 | BUS_ID_SIZE); | |
1079 | fixed_mdio_set_link_update(fixed_phy->phydev, | |
1080 | &cpmac_link_update); | |
1081 | goto phy_found; | |
1082 | } | |
1083 | } | |
1084 | if (netif_msg_drv(priv)) | |
1085 | printk(KERN_ERR "%s: Could not find fixed PHY\n", | |
1086 | dev->name); | |
1087 | rc = -ENODEV; | |
1088 | goto fail; | |
1089 | } | |
1090 | ||
1091 | phy_found: | |
1092 | priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link, 0, | |
1093 | PHY_INTERFACE_MODE_MII); | |
1094 | if (IS_ERR(priv->phy)) { | |
1095 | if (netif_msg_drv(priv)) | |
1096 | printk(KERN_ERR "%s: Could not attach to PHY\n", | |
1097 | dev->name); | |
1098 | return PTR_ERR(priv->phy); | |
1099 | } | |
d95b39c3 MC |
1100 | |
1101 | if ((rc = register_netdev(dev))) { | |
1102 | printk(KERN_ERR "cpmac: error %i registering device %s\n", rc, | |
1103 | dev->name); | |
1104 | goto fail; | |
1105 | } | |
1106 | ||
1107 | if (netif_msg_probe(priv)) { | |
1108 | printk(KERN_INFO | |
df523b5c EK |
1109 | "cpmac: device %s (regs: %p, irq: %d, phy: %s, " |
1110 | "mac: %s)\n", dev->name, (void *)mem->start, dev->irq, | |
1111 | priv->phy_name, print_mac(mac, dev->dev_addr)); | |
d95b39c3 MC |
1112 | } |
1113 | return 0; | |
1114 | ||
1115 | fail: | |
1116 | free_netdev(dev); | |
1117 | return rc; | |
1118 | } | |
1119 | ||
1120 | static int __devexit cpmac_remove(struct platform_device *pdev) | |
1121 | { | |
1122 | struct net_device *dev = platform_get_drvdata(pdev); | |
1123 | unregister_netdev(dev); | |
1124 | free_netdev(dev); | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | static struct platform_driver cpmac_driver = { | |
1129 | .driver.name = "cpmac", | |
1130 | .probe = cpmac_probe, | |
1131 | .remove = __devexit_p(cpmac_remove), | |
1132 | }; | |
1133 | ||
1134 | int __devinit cpmac_init(void) | |
1135 | { | |
1136 | u32 mask; | |
1137 | int i, res; | |
1138 | ||
1139 | cpmac_mii.priv = ioremap(AR7_REGS_MDIO, 256); | |
1140 | ||
1141 | if (!cpmac_mii.priv) { | |
1142 | printk(KERN_ERR "Can't ioremap mdio registers\n"); | |
1143 | return -ENXIO; | |
1144 | } | |
1145 | ||
1146 | #warning FIXME: unhardcode gpio&reset bits | |
1147 | ar7_gpio_disable(26); | |
1148 | ar7_gpio_disable(27); | |
1149 | ar7_device_reset(AR7_RESET_BIT_CPMAC_LO); | |
1150 | ar7_device_reset(AR7_RESET_BIT_CPMAC_HI); | |
1151 | ar7_device_reset(AR7_RESET_BIT_EPHY); | |
1152 | ||
1153 | cpmac_mii.reset(&cpmac_mii); | |
1154 | ||
1155 | for (i = 0; i < 300000; i++) | |
1156 | if ((mask = cpmac_read(cpmac_mii.priv, CPMAC_MDIO_ALIVE))) | |
1157 | break; | |
1158 | else | |
1159 | cpu_relax(); | |
1160 | ||
1161 | mask &= 0x7fffffff; | |
1162 | if (mask & (mask - 1)) { | |
1163 | external_switch = 1; | |
1164 | mask = 0; | |
1165 | } | |
1166 | ||
1167 | cpmac_mii.phy_mask = ~(mask | 0x80000000); | |
1168 | ||
1169 | res = mdiobus_register(&cpmac_mii); | |
1170 | if (res) | |
1171 | goto fail_mii; | |
1172 | ||
1173 | res = platform_driver_register(&cpmac_driver); | |
1174 | if (res) | |
1175 | goto fail_cpmac; | |
1176 | ||
1177 | return 0; | |
1178 | ||
1179 | fail_cpmac: | |
1180 | mdiobus_unregister(&cpmac_mii); | |
1181 | ||
1182 | fail_mii: | |
1183 | iounmap(cpmac_mii.priv); | |
1184 | ||
1185 | return res; | |
1186 | } | |
1187 | ||
1188 | void __devexit cpmac_exit(void) | |
1189 | { | |
1190 | platform_driver_unregister(&cpmac_driver); | |
1191 | mdiobus_unregister(&cpmac_mii); | |
1192 | iounmap(cpmac_mii.priv); | |
1193 | } | |
1194 | ||
1195 | module_init(cpmac_init); | |
1196 | module_exit(cpmac_exit); |