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Commit | Line | Data |
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a1702857 | 1 | /* |
3396c782 | 2 | * linux/drivers/net/ethernet/ethoc.c |
a1702857 TR |
3 | * |
4 | * Copyright (C) 2007-2008 Avionic Design Development GmbH | |
5 | * Copyright (C) 2008-2009 Avionic Design GmbH | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Written by Thierry Reding <thierry.reding@avionic-design.de> | |
12 | */ | |
13 | ||
b7f080cf | 14 | #include <linux/dma-mapping.h> |
a1702857 | 15 | #include <linux/etherdevice.h> |
a13aff06 | 16 | #include <linux/clk.h> |
a1702857 | 17 | #include <linux/crc32.h> |
a6b7a407 | 18 | #include <linux/interrupt.h> |
a1702857 TR |
19 | #include <linux/io.h> |
20 | #include <linux/mii.h> | |
21 | #include <linux/phy.h> | |
22 | #include <linux/platform_device.h> | |
d43c36dc | 23 | #include <linux/sched.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
e0f4258b | 25 | #include <linux/of.h> |
9d9779e7 | 26 | #include <linux/module.h> |
a1702857 TR |
27 | #include <net/ethoc.h> |
28 | ||
0baa080c TC |
29 | static int buffer_size = 0x8000; /* 32 KBytes */ |
30 | module_param(buffer_size, int, 0); | |
31 | MODULE_PARM_DESC(buffer_size, "DMA buffer allocation size"); | |
32 | ||
a1702857 TR |
33 | /* register offsets */ |
34 | #define MODER 0x00 | |
35 | #define INT_SOURCE 0x04 | |
36 | #define INT_MASK 0x08 | |
37 | #define IPGT 0x0c | |
38 | #define IPGR1 0x10 | |
39 | #define IPGR2 0x14 | |
40 | #define PACKETLEN 0x18 | |
41 | #define COLLCONF 0x1c | |
42 | #define TX_BD_NUM 0x20 | |
43 | #define CTRLMODER 0x24 | |
44 | #define MIIMODER 0x28 | |
45 | #define MIICOMMAND 0x2c | |
46 | #define MIIADDRESS 0x30 | |
47 | #define MIITX_DATA 0x34 | |
48 | #define MIIRX_DATA 0x38 | |
49 | #define MIISTATUS 0x3c | |
50 | #define MAC_ADDR0 0x40 | |
51 | #define MAC_ADDR1 0x44 | |
52 | #define ETH_HASH0 0x48 | |
53 | #define ETH_HASH1 0x4c | |
54 | #define ETH_TXCTRL 0x50 | |
1112909f | 55 | #define ETH_END 0x54 |
a1702857 TR |
56 | |
57 | /* mode register */ | |
58 | #define MODER_RXEN (1 << 0) /* receive enable */ | |
59 | #define MODER_TXEN (1 << 1) /* transmit enable */ | |
60 | #define MODER_NOPRE (1 << 2) /* no preamble */ | |
61 | #define MODER_BRO (1 << 3) /* broadcast address */ | |
62 | #define MODER_IAM (1 << 4) /* individual address mode */ | |
63 | #define MODER_PRO (1 << 5) /* promiscuous mode */ | |
64 | #define MODER_IFG (1 << 6) /* interframe gap for incoming frames */ | |
65 | #define MODER_LOOP (1 << 7) /* loopback */ | |
66 | #define MODER_NBO (1 << 8) /* no back-off */ | |
67 | #define MODER_EDE (1 << 9) /* excess defer enable */ | |
68 | #define MODER_FULLD (1 << 10) /* full duplex */ | |
69 | #define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */ | |
70 | #define MODER_DCRC (1 << 12) /* delayed CRC enable */ | |
71 | #define MODER_CRC (1 << 13) /* CRC enable */ | |
72 | #define MODER_HUGE (1 << 14) /* huge packets enable */ | |
73 | #define MODER_PAD (1 << 15) /* padding enabled */ | |
74 | #define MODER_RSM (1 << 16) /* receive small packets */ | |
75 | ||
76 | /* interrupt source and mask registers */ | |
77 | #define INT_MASK_TXF (1 << 0) /* transmit frame */ | |
78 | #define INT_MASK_TXE (1 << 1) /* transmit error */ | |
79 | #define INT_MASK_RXF (1 << 2) /* receive frame */ | |
80 | #define INT_MASK_RXE (1 << 3) /* receive error */ | |
81 | #define INT_MASK_BUSY (1 << 4) | |
82 | #define INT_MASK_TXC (1 << 5) /* transmit control frame */ | |
83 | #define INT_MASK_RXC (1 << 6) /* receive control frame */ | |
84 | ||
85 | #define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE) | |
86 | #define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE) | |
87 | ||
88 | #define INT_MASK_ALL ( \ | |
89 | INT_MASK_TXF | INT_MASK_TXE | \ | |
90 | INT_MASK_RXF | INT_MASK_RXE | \ | |
91 | INT_MASK_TXC | INT_MASK_RXC | \ | |
92 | INT_MASK_BUSY \ | |
93 | ) | |
94 | ||
95 | /* packet length register */ | |
96 | #define PACKETLEN_MIN(min) (((min) & 0xffff) << 16) | |
97 | #define PACKETLEN_MAX(max) (((max) & 0xffff) << 0) | |
98 | #define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \ | |
99 | PACKETLEN_MAX(max)) | |
100 | ||
101 | /* transmit buffer number register */ | |
102 | #define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80) | |
103 | ||
104 | /* control module mode register */ | |
105 | #define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */ | |
106 | #define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */ | |
107 | #define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */ | |
108 | ||
109 | /* MII mode register */ | |
110 | #define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */ | |
111 | #define MIIMODER_NOPRE (1 << 8) /* no preamble */ | |
112 | ||
113 | /* MII command register */ | |
114 | #define MIICOMMAND_SCAN (1 << 0) /* scan status */ | |
115 | #define MIICOMMAND_READ (1 << 1) /* read status */ | |
116 | #define MIICOMMAND_WRITE (1 << 2) /* write control data */ | |
117 | ||
118 | /* MII address register */ | |
119 | #define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0) | |
120 | #define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8) | |
121 | #define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \ | |
122 | MIIADDRESS_RGAD(reg)) | |
123 | ||
124 | /* MII transmit data register */ | |
125 | #define MIITX_DATA_VAL(x) ((x) & 0xffff) | |
126 | ||
127 | /* MII receive data register */ | |
128 | #define MIIRX_DATA_VAL(x) ((x) & 0xffff) | |
129 | ||
130 | /* MII status register */ | |
131 | #define MIISTATUS_LINKFAIL (1 << 0) | |
132 | #define MIISTATUS_BUSY (1 << 1) | |
133 | #define MIISTATUS_INVALID (1 << 2) | |
134 | ||
135 | /* TX buffer descriptor */ | |
136 | #define TX_BD_CS (1 << 0) /* carrier sense lost */ | |
137 | #define TX_BD_DF (1 << 1) /* defer indication */ | |
138 | #define TX_BD_LC (1 << 2) /* late collision */ | |
139 | #define TX_BD_RL (1 << 3) /* retransmission limit */ | |
140 | #define TX_BD_RETRY_MASK (0x00f0) | |
141 | #define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4) | |
142 | #define TX_BD_UR (1 << 8) /* transmitter underrun */ | |
143 | #define TX_BD_CRC (1 << 11) /* TX CRC enable */ | |
144 | #define TX_BD_PAD (1 << 12) /* pad enable for short packets */ | |
145 | #define TX_BD_WRAP (1 << 13) | |
146 | #define TX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
147 | #define TX_BD_READY (1 << 15) /* TX buffer ready */ | |
148 | #define TX_BD_LEN(x) (((x) & 0xffff) << 16) | |
149 | #define TX_BD_LEN_MASK (0xffff << 16) | |
150 | ||
151 | #define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \ | |
152 | TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR) | |
153 | ||
154 | /* RX buffer descriptor */ | |
155 | #define RX_BD_LC (1 << 0) /* late collision */ | |
156 | #define RX_BD_CRC (1 << 1) /* RX CRC error */ | |
157 | #define RX_BD_SF (1 << 2) /* short frame */ | |
158 | #define RX_BD_TL (1 << 3) /* too long */ | |
159 | #define RX_BD_DN (1 << 4) /* dribble nibble */ | |
160 | #define RX_BD_IS (1 << 5) /* invalid symbol */ | |
161 | #define RX_BD_OR (1 << 6) /* receiver overrun */ | |
162 | #define RX_BD_MISS (1 << 7) | |
163 | #define RX_BD_CF (1 << 8) /* control frame */ | |
164 | #define RX_BD_WRAP (1 << 13) | |
165 | #define RX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
166 | #define RX_BD_EMPTY (1 << 15) | |
167 | #define RX_BD_LEN(x) (((x) & 0xffff) << 16) | |
168 | ||
169 | #define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \ | |
170 | RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS) | |
171 | ||
172 | #define ETHOC_BUFSIZ 1536 | |
173 | #define ETHOC_ZLEN 64 | |
174 | #define ETHOC_BD_BASE 0x400 | |
175 | #define ETHOC_TIMEOUT (HZ / 2) | |
176 | #define ETHOC_MII_TIMEOUT (1 + (HZ / 5)) | |
177 | ||
178 | /** | |
179 | * struct ethoc - driver-private device structure | |
180 | * @iobase: pointer to I/O memory region | |
181 | * @membase: pointer to buffer memory region | |
0baa080c | 182 | * @dma_alloc: dma allocated buffer size |
ee02a4ef | 183 | * @io_region_size: I/O memory region size |
bee7bacd | 184 | * @num_bd: number of buffer descriptors |
a1702857 TR |
185 | * @num_tx: number of send buffers |
186 | * @cur_tx: last send buffer written | |
187 | * @dty_tx: last buffer actually sent | |
188 | * @num_rx: number of receive buffers | |
189 | * @cur_rx: current receive buffer | |
f8555ad0 | 190 | * @vma: pointer to array of virtual memory addresses for buffers |
a1702857 TR |
191 | * @netdev: pointer to network device structure |
192 | * @napi: NAPI structure | |
a1702857 | 193 | * @msg_enable: device state flags |
a1702857 TR |
194 | * @lock: device lock |
195 | * @phy: attached PHY | |
196 | * @mdio: MDIO bus for PHY access | |
197 | * @phy_id: address of attached PHY | |
198 | */ | |
199 | struct ethoc { | |
200 | void __iomem *iobase; | |
201 | void __iomem *membase; | |
0baa080c | 202 | int dma_alloc; |
ee02a4ef | 203 | resource_size_t io_region_size; |
06e60e59 | 204 | bool big_endian; |
a1702857 | 205 | |
bee7bacd | 206 | unsigned int num_bd; |
a1702857 TR |
207 | unsigned int num_tx; |
208 | unsigned int cur_tx; | |
209 | unsigned int dty_tx; | |
210 | ||
211 | unsigned int num_rx; | |
212 | unsigned int cur_rx; | |
213 | ||
72aa8e1b | 214 | void **vma; |
f8555ad0 | 215 | |
a1702857 TR |
216 | struct net_device *netdev; |
217 | struct napi_struct napi; | |
a1702857 TR |
218 | u32 msg_enable; |
219 | ||
a1702857 TR |
220 | spinlock_t lock; |
221 | ||
222 | struct phy_device *phy; | |
223 | struct mii_bus *mdio; | |
a13aff06 | 224 | struct clk *clk; |
a1702857 TR |
225 | s8 phy_id; |
226 | }; | |
227 | ||
228 | /** | |
229 | * struct ethoc_bd - buffer descriptor | |
230 | * @stat: buffer statistics | |
231 | * @addr: physical memory address | |
232 | */ | |
233 | struct ethoc_bd { | |
234 | u32 stat; | |
235 | u32 addr; | |
236 | }; | |
237 | ||
16dd18b0 | 238 | static inline u32 ethoc_read(struct ethoc *dev, loff_t offset) |
a1702857 | 239 | { |
06e60e59 MF |
240 | if (dev->big_endian) |
241 | return ioread32be(dev->iobase + offset); | |
242 | else | |
243 | return ioread32(dev->iobase + offset); | |
a1702857 TR |
244 | } |
245 | ||
16dd18b0 | 246 | static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data) |
a1702857 | 247 | { |
06e60e59 MF |
248 | if (dev->big_endian) |
249 | iowrite32be(data, dev->iobase + offset); | |
250 | else | |
251 | iowrite32(data, dev->iobase + offset); | |
a1702857 TR |
252 | } |
253 | ||
16dd18b0 TC |
254 | static inline void ethoc_read_bd(struct ethoc *dev, int index, |
255 | struct ethoc_bd *bd) | |
a1702857 TR |
256 | { |
257 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
258 | bd->stat = ethoc_read(dev, offset + 0); | |
259 | bd->addr = ethoc_read(dev, offset + 4); | |
260 | } | |
261 | ||
16dd18b0 | 262 | static inline void ethoc_write_bd(struct ethoc *dev, int index, |
a1702857 TR |
263 | const struct ethoc_bd *bd) |
264 | { | |
265 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
266 | ethoc_write(dev, offset + 0, bd->stat); | |
267 | ethoc_write(dev, offset + 4, bd->addr); | |
268 | } | |
269 | ||
16dd18b0 | 270 | static inline void ethoc_enable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
271 | { |
272 | u32 imask = ethoc_read(dev, INT_MASK); | |
273 | imask |= mask; | |
274 | ethoc_write(dev, INT_MASK, imask); | |
275 | } | |
276 | ||
16dd18b0 | 277 | static inline void ethoc_disable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
278 | { |
279 | u32 imask = ethoc_read(dev, INT_MASK); | |
280 | imask &= ~mask; | |
281 | ethoc_write(dev, INT_MASK, imask); | |
282 | } | |
283 | ||
16dd18b0 | 284 | static inline void ethoc_ack_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
285 | { |
286 | ethoc_write(dev, INT_SOURCE, mask); | |
287 | } | |
288 | ||
16dd18b0 | 289 | static inline void ethoc_enable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
290 | { |
291 | u32 mode = ethoc_read(dev, MODER); | |
292 | mode |= MODER_RXEN | MODER_TXEN; | |
293 | ethoc_write(dev, MODER, mode); | |
294 | } | |
295 | ||
16dd18b0 | 296 | static inline void ethoc_disable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
297 | { |
298 | u32 mode = ethoc_read(dev, MODER); | |
299 | mode &= ~(MODER_RXEN | MODER_TXEN); | |
300 | ethoc_write(dev, MODER, mode); | |
301 | } | |
302 | ||
5cf3e034 | 303 | static int ethoc_init_ring(struct ethoc *dev, unsigned long mem_start) |
a1702857 TR |
304 | { |
305 | struct ethoc_bd bd; | |
306 | int i; | |
72aa8e1b | 307 | void *vma; |
a1702857 TR |
308 | |
309 | dev->cur_tx = 0; | |
310 | dev->dty_tx = 0; | |
311 | dev->cur_rx = 0; | |
312 | ||
ee4f56b9 JB |
313 | ethoc_write(dev, TX_BD_NUM, dev->num_tx); |
314 | ||
a1702857 | 315 | /* setup transmission buffers */ |
f8555ad0 | 316 | bd.addr = mem_start; |
a1702857 | 317 | bd.stat = TX_BD_IRQ | TX_BD_CRC; |
f8555ad0 | 318 | vma = dev->membase; |
a1702857 TR |
319 | |
320 | for (i = 0; i < dev->num_tx; i++) { | |
321 | if (i == dev->num_tx - 1) | |
322 | bd.stat |= TX_BD_WRAP; | |
323 | ||
324 | ethoc_write_bd(dev, i, &bd); | |
325 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
326 | |
327 | dev->vma[i] = vma; | |
328 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
329 | } |
330 | ||
a1702857 TR |
331 | bd.stat = RX_BD_EMPTY | RX_BD_IRQ; |
332 | ||
333 | for (i = 0; i < dev->num_rx; i++) { | |
334 | if (i == dev->num_rx - 1) | |
335 | bd.stat |= RX_BD_WRAP; | |
336 | ||
337 | ethoc_write_bd(dev, dev->num_tx + i, &bd); | |
338 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
339 | |
340 | dev->vma[dev->num_tx + i] = vma; | |
341 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
342 | } |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int ethoc_reset(struct ethoc *dev) | |
348 | { | |
349 | u32 mode; | |
350 | ||
351 | /* TODO: reset controller? */ | |
352 | ||
353 | ethoc_disable_rx_and_tx(dev); | |
354 | ||
355 | /* TODO: setup registers */ | |
356 | ||
357 | /* enable FCS generation and automatic padding */ | |
358 | mode = ethoc_read(dev, MODER); | |
359 | mode |= MODER_CRC | MODER_PAD; | |
360 | ethoc_write(dev, MODER, mode); | |
361 | ||
362 | /* set full-duplex mode */ | |
363 | mode = ethoc_read(dev, MODER); | |
364 | mode |= MODER_FULLD; | |
365 | ethoc_write(dev, MODER, mode); | |
366 | ethoc_write(dev, IPGT, 0x15); | |
367 | ||
368 | ethoc_ack_irq(dev, INT_MASK_ALL); | |
369 | ethoc_enable_irq(dev, INT_MASK_ALL); | |
370 | ethoc_enable_rx_and_tx(dev); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static unsigned int ethoc_update_rx_stats(struct ethoc *dev, | |
375 | struct ethoc_bd *bd) | |
376 | { | |
377 | struct net_device *netdev = dev->netdev; | |
378 | unsigned int ret = 0; | |
379 | ||
380 | if (bd->stat & RX_BD_TL) { | |
381 | dev_err(&netdev->dev, "RX: frame too long\n"); | |
57616ee4 | 382 | netdev->stats.rx_length_errors++; |
a1702857 TR |
383 | ret++; |
384 | } | |
385 | ||
386 | if (bd->stat & RX_BD_SF) { | |
387 | dev_err(&netdev->dev, "RX: frame too short\n"); | |
57616ee4 | 388 | netdev->stats.rx_length_errors++; |
a1702857 TR |
389 | ret++; |
390 | } | |
391 | ||
392 | if (bd->stat & RX_BD_DN) { | |
393 | dev_err(&netdev->dev, "RX: dribble nibble\n"); | |
57616ee4 | 394 | netdev->stats.rx_frame_errors++; |
a1702857 TR |
395 | } |
396 | ||
397 | if (bd->stat & RX_BD_CRC) { | |
398 | dev_err(&netdev->dev, "RX: wrong CRC\n"); | |
57616ee4 | 399 | netdev->stats.rx_crc_errors++; |
a1702857 TR |
400 | ret++; |
401 | } | |
402 | ||
403 | if (bd->stat & RX_BD_OR) { | |
404 | dev_err(&netdev->dev, "RX: overrun\n"); | |
57616ee4 | 405 | netdev->stats.rx_over_errors++; |
a1702857 TR |
406 | ret++; |
407 | } | |
408 | ||
409 | if (bd->stat & RX_BD_MISS) | |
57616ee4 | 410 | netdev->stats.rx_missed_errors++; |
a1702857 TR |
411 | |
412 | if (bd->stat & RX_BD_LC) { | |
413 | dev_err(&netdev->dev, "RX: late collision\n"); | |
57616ee4 | 414 | netdev->stats.collisions++; |
a1702857 TR |
415 | ret++; |
416 | } | |
417 | ||
418 | return ret; | |
419 | } | |
420 | ||
421 | static int ethoc_rx(struct net_device *dev, int limit) | |
422 | { | |
423 | struct ethoc *priv = netdev_priv(dev); | |
424 | int count; | |
425 | ||
426 | for (count = 0; count < limit; ++count) { | |
427 | unsigned int entry; | |
428 | struct ethoc_bd bd; | |
429 | ||
6a632625 | 430 | entry = priv->num_tx + priv->cur_rx; |
a1702857 | 431 | ethoc_read_bd(priv, entry, &bd); |
20f70ddd JB |
432 | if (bd.stat & RX_BD_EMPTY) { |
433 | ethoc_ack_irq(priv, INT_MASK_RX); | |
434 | /* If packet (interrupt) came in between checking | |
435 | * BD_EMTPY and clearing the interrupt source, then we | |
436 | * risk missing the packet as the RX interrupt won't | |
437 | * trigger right away when we reenable it; hence, check | |
438 | * BD_EMTPY here again to make sure there isn't such a | |
439 | * packet waiting for us... | |
440 | */ | |
441 | ethoc_read_bd(priv, entry, &bd); | |
442 | if (bd.stat & RX_BD_EMPTY) | |
443 | break; | |
444 | } | |
a1702857 TR |
445 | |
446 | if (ethoc_update_rx_stats(priv, &bd) == 0) { | |
447 | int size = bd.stat >> 16; | |
89d71a66 | 448 | struct sk_buff *skb; |
050f91dc TC |
449 | |
450 | size -= 4; /* strip the CRC */ | |
89d71a66 | 451 | skb = netdev_alloc_skb_ip_align(dev, size); |
050f91dc | 452 | |
a1702857 | 453 | if (likely(skb)) { |
f8555ad0 | 454 | void *src = priv->vma[entry]; |
a1702857 TR |
455 | memcpy_fromio(skb_put(skb, size), src, size); |
456 | skb->protocol = eth_type_trans(skb, dev); | |
57616ee4 KV |
457 | dev->stats.rx_packets++; |
458 | dev->stats.rx_bytes += size; | |
a1702857 TR |
459 | netif_receive_skb(skb); |
460 | } else { | |
461 | if (net_ratelimit()) | |
72aa8e1b BG |
462 | dev_warn(&dev->dev, |
463 | "low on memory - packet dropped\n"); | |
a1702857 | 464 | |
57616ee4 | 465 | dev->stats.rx_dropped++; |
a1702857 TR |
466 | break; |
467 | } | |
468 | } | |
469 | ||
470 | /* clear the buffer descriptor so it can be reused */ | |
471 | bd.stat &= ~RX_BD_STATS; | |
472 | bd.stat |= RX_BD_EMPTY; | |
473 | ethoc_write_bd(priv, entry, &bd); | |
6a632625 JB |
474 | if (++priv->cur_rx == priv->num_rx) |
475 | priv->cur_rx = 0; | |
a1702857 TR |
476 | } |
477 | ||
478 | return count; | |
479 | } | |
480 | ||
4f64bcb2 | 481 | static void ethoc_update_tx_stats(struct ethoc *dev, struct ethoc_bd *bd) |
a1702857 TR |
482 | { |
483 | struct net_device *netdev = dev->netdev; | |
484 | ||
485 | if (bd->stat & TX_BD_LC) { | |
486 | dev_err(&netdev->dev, "TX: late collision\n"); | |
57616ee4 | 487 | netdev->stats.tx_window_errors++; |
a1702857 TR |
488 | } |
489 | ||
490 | if (bd->stat & TX_BD_RL) { | |
491 | dev_err(&netdev->dev, "TX: retransmit limit\n"); | |
57616ee4 | 492 | netdev->stats.tx_aborted_errors++; |
a1702857 TR |
493 | } |
494 | ||
495 | if (bd->stat & TX_BD_UR) { | |
496 | dev_err(&netdev->dev, "TX: underrun\n"); | |
57616ee4 | 497 | netdev->stats.tx_fifo_errors++; |
a1702857 TR |
498 | } |
499 | ||
500 | if (bd->stat & TX_BD_CS) { | |
501 | dev_err(&netdev->dev, "TX: carrier sense lost\n"); | |
57616ee4 | 502 | netdev->stats.tx_carrier_errors++; |
a1702857 TR |
503 | } |
504 | ||
505 | if (bd->stat & TX_BD_STATS) | |
57616ee4 | 506 | netdev->stats.tx_errors++; |
a1702857 | 507 | |
57616ee4 KV |
508 | netdev->stats.collisions += (bd->stat >> 4) & 0xf; |
509 | netdev->stats.tx_bytes += bd->stat >> 16; | |
510 | netdev->stats.tx_packets++; | |
a1702857 TR |
511 | } |
512 | ||
fa98eb0e | 513 | static int ethoc_tx(struct net_device *dev, int limit) |
a1702857 TR |
514 | { |
515 | struct ethoc *priv = netdev_priv(dev); | |
fa98eb0e JB |
516 | int count; |
517 | struct ethoc_bd bd; | |
a1702857 | 518 | |
fa98eb0e JB |
519 | for (count = 0; count < limit; ++count) { |
520 | unsigned int entry; | |
a1702857 | 521 | |
6a632625 | 522 | entry = priv->dty_tx & (priv->num_tx-1); |
a1702857 TR |
523 | |
524 | ethoc_read_bd(priv, entry, &bd); | |
a1702857 | 525 | |
fa98eb0e JB |
526 | if (bd.stat & TX_BD_READY || (priv->dty_tx == priv->cur_tx)) { |
527 | ethoc_ack_irq(priv, INT_MASK_TX); | |
528 | /* If interrupt came in between reading in the BD | |
529 | * and clearing the interrupt source, then we risk | |
530 | * missing the event as the TX interrupt won't trigger | |
531 | * right away when we reenable it; hence, check | |
532 | * BD_EMPTY here again to make sure there isn't such an | |
533 | * event pending... | |
534 | */ | |
535 | ethoc_read_bd(priv, entry, &bd); | |
536 | if (bd.stat & TX_BD_READY || | |
537 | (priv->dty_tx == priv->cur_tx)) | |
538 | break; | |
539 | } | |
540 | ||
4f64bcb2 | 541 | ethoc_update_tx_stats(priv, &bd); |
fa98eb0e | 542 | priv->dty_tx++; |
a1702857 TR |
543 | } |
544 | ||
545 | if ((priv->cur_tx - priv->dty_tx) <= (priv->num_tx / 2)) | |
546 | netif_wake_queue(dev); | |
547 | ||
fa98eb0e | 548 | return count; |
a1702857 TR |
549 | } |
550 | ||
551 | static irqreturn_t ethoc_interrupt(int irq, void *dev_id) | |
552 | { | |
57616ee4 | 553 | struct net_device *dev = dev_id; |
a1702857 TR |
554 | struct ethoc *priv = netdev_priv(dev); |
555 | u32 pending; | |
fa98eb0e JB |
556 | u32 mask; |
557 | ||
558 | /* Figure out what triggered the interrupt... | |
559 | * The tricky bit here is that the interrupt source bits get | |
25985edc | 560 | * set in INT_SOURCE for an event regardless of whether that |
fa98eb0e JB |
561 | * event is masked or not. Thus, in order to figure out what |
562 | * triggered the interrupt, we need to remove the sources | |
563 | * for all events that are currently masked. This behaviour | |
564 | * is not particularly well documented but reasonable... | |
565 | */ | |
566 | mask = ethoc_read(priv, INT_MASK); | |
a1702857 | 567 | pending = ethoc_read(priv, INT_SOURCE); |
fa98eb0e JB |
568 | pending &= mask; |
569 | ||
72aa8e1b | 570 | if (unlikely(pending == 0)) |
a1702857 | 571 | return IRQ_NONE; |
a1702857 | 572 | |
50c54a57 | 573 | ethoc_ack_irq(priv, pending); |
a1702857 | 574 | |
fa98eb0e | 575 | /* We always handle the dropped packet interrupt */ |
a1702857 TR |
576 | if (pending & INT_MASK_BUSY) { |
577 | dev_err(&dev->dev, "packet dropped\n"); | |
57616ee4 | 578 | dev->stats.rx_dropped++; |
a1702857 TR |
579 | } |
580 | ||
fa98eb0e JB |
581 | /* Handle receive/transmit event by switching to polling */ |
582 | if (pending & (INT_MASK_TX | INT_MASK_RX)) { | |
583 | ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
584 | napi_schedule(&priv->napi); | |
a1702857 TR |
585 | } |
586 | ||
a1702857 TR |
587 | return IRQ_HANDLED; |
588 | } | |
589 | ||
590 | static int ethoc_get_mac_address(struct net_device *dev, void *addr) | |
591 | { | |
592 | struct ethoc *priv = netdev_priv(dev); | |
593 | u8 *mac = (u8 *)addr; | |
594 | u32 reg; | |
595 | ||
596 | reg = ethoc_read(priv, MAC_ADDR0); | |
597 | mac[2] = (reg >> 24) & 0xff; | |
598 | mac[3] = (reg >> 16) & 0xff; | |
599 | mac[4] = (reg >> 8) & 0xff; | |
600 | mac[5] = (reg >> 0) & 0xff; | |
601 | ||
602 | reg = ethoc_read(priv, MAC_ADDR1); | |
603 | mac[0] = (reg >> 8) & 0xff; | |
604 | mac[1] = (reg >> 0) & 0xff; | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static int ethoc_poll(struct napi_struct *napi, int budget) | |
610 | { | |
611 | struct ethoc *priv = container_of(napi, struct ethoc, napi); | |
fa98eb0e JB |
612 | int rx_work_done = 0; |
613 | int tx_work_done = 0; | |
614 | ||
615 | rx_work_done = ethoc_rx(priv->netdev, budget); | |
616 | tx_work_done = ethoc_tx(priv->netdev, budget); | |
a1702857 | 617 | |
fa98eb0e | 618 | if (rx_work_done < budget && tx_work_done < budget) { |
a1702857 | 619 | napi_complete(napi); |
fa98eb0e | 620 | ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX); |
a1702857 TR |
621 | } |
622 | ||
fa98eb0e | 623 | return rx_work_done; |
a1702857 TR |
624 | } |
625 | ||
626 | static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg) | |
627 | { | |
a1702857 | 628 | struct ethoc *priv = bus->priv; |
8dac428a | 629 | int i; |
a1702857 TR |
630 | |
631 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
632 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ); | |
633 | ||
72aa8e1b | 634 | for (i = 0; i < 5; i++) { |
a1702857 TR |
635 | u32 status = ethoc_read(priv, MIISTATUS); |
636 | if (!(status & MIISTATUS_BUSY)) { | |
637 | u32 data = ethoc_read(priv, MIIRX_DATA); | |
638 | /* reset MII command register */ | |
639 | ethoc_write(priv, MIICOMMAND, 0); | |
640 | return data; | |
641 | } | |
72aa8e1b | 642 | usleep_range(100, 200); |
a1702857 TR |
643 | } |
644 | ||
645 | return -EBUSY; | |
646 | } | |
647 | ||
648 | static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
649 | { | |
a1702857 | 650 | struct ethoc *priv = bus->priv; |
8dac428a | 651 | int i; |
a1702857 TR |
652 | |
653 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
654 | ethoc_write(priv, MIITX_DATA, val); | |
655 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE); | |
656 | ||
72aa8e1b | 657 | for (i = 0; i < 5; i++) { |
a1702857 | 658 | u32 stat = ethoc_read(priv, MIISTATUS); |
b46773db JB |
659 | if (!(stat & MIISTATUS_BUSY)) { |
660 | /* reset MII command register */ | |
661 | ethoc_write(priv, MIICOMMAND, 0); | |
a1702857 | 662 | return 0; |
b46773db | 663 | } |
72aa8e1b | 664 | usleep_range(100, 200); |
a1702857 TR |
665 | } |
666 | ||
667 | return -EBUSY; | |
668 | } | |
669 | ||
a1702857 TR |
670 | static void ethoc_mdio_poll(struct net_device *dev) |
671 | { | |
672 | } | |
673 | ||
a0a4efed | 674 | static int ethoc_mdio_probe(struct net_device *dev) |
a1702857 TR |
675 | { |
676 | struct ethoc *priv = netdev_priv(dev); | |
677 | struct phy_device *phy; | |
637f33b8 | 678 | int err; |
a1702857 | 679 | |
72aa8e1b | 680 | if (priv->phy_id != -1) |
7f854420 | 681 | phy = mdiobus_get_phy(priv->mdio, priv->phy_id); |
72aa8e1b | 682 | else |
637f33b8 | 683 | phy = phy_find_first(priv->mdio); |
a1702857 TR |
684 | |
685 | if (!phy) { | |
686 | dev_err(&dev->dev, "no PHY found\n"); | |
687 | return -ENXIO; | |
688 | } | |
689 | ||
f9a8f83b FF |
690 | err = phy_connect_direct(dev, phy, ethoc_mdio_poll, |
691 | PHY_INTERFACE_MODE_GMII); | |
637f33b8 | 692 | if (err) { |
a1702857 | 693 | dev_err(&dev->dev, "could not attach to PHY\n"); |
637f33b8 | 694 | return err; |
a1702857 TR |
695 | } |
696 | ||
697 | priv->phy = phy; | |
445a48cc MF |
698 | phy->advertising &= ~(ADVERTISED_1000baseT_Full | |
699 | ADVERTISED_1000baseT_Half); | |
700 | phy->supported &= ~(SUPPORTED_1000baseT_Full | | |
701 | SUPPORTED_1000baseT_Half); | |
702 | ||
a1702857 TR |
703 | return 0; |
704 | } | |
705 | ||
706 | static int ethoc_open(struct net_device *dev) | |
707 | { | |
708 | struct ethoc *priv = netdev_priv(dev); | |
a1702857 TR |
709 | int ret; |
710 | ||
711 | ret = request_irq(dev->irq, ethoc_interrupt, IRQF_SHARED, | |
712 | dev->name, dev); | |
713 | if (ret) | |
714 | return ret; | |
715 | ||
5cf3e034 | 716 | ethoc_init_ring(priv, dev->mem_start); |
a1702857 TR |
717 | ethoc_reset(priv); |
718 | ||
719 | if (netif_queue_stopped(dev)) { | |
720 | dev_dbg(&dev->dev, " resuming queue\n"); | |
721 | netif_wake_queue(dev); | |
722 | } else { | |
723 | dev_dbg(&dev->dev, " starting queue\n"); | |
724 | netif_start_queue(dev); | |
725 | } | |
726 | ||
727 | phy_start(priv->phy); | |
728 | napi_enable(&priv->napi); | |
729 | ||
730 | if (netif_msg_ifup(priv)) { | |
731 | dev_info(&dev->dev, "I/O: %08lx Memory: %08lx-%08lx\n", | |
732 | dev->base_addr, dev->mem_start, dev->mem_end); | |
733 | } | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | static int ethoc_stop(struct net_device *dev) | |
739 | { | |
740 | struct ethoc *priv = netdev_priv(dev); | |
741 | ||
742 | napi_disable(&priv->napi); | |
743 | ||
744 | if (priv->phy) | |
745 | phy_stop(priv->phy); | |
746 | ||
747 | ethoc_disable_rx_and_tx(priv); | |
748 | free_irq(dev->irq, dev); | |
749 | ||
750 | if (!netif_queue_stopped(dev)) | |
751 | netif_stop_queue(dev); | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | static int ethoc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
757 | { | |
758 | struct ethoc *priv = netdev_priv(dev); | |
759 | struct mii_ioctl_data *mdio = if_mii(ifr); | |
760 | struct phy_device *phy = NULL; | |
761 | ||
762 | if (!netif_running(dev)) | |
763 | return -EINVAL; | |
764 | ||
765 | if (cmd != SIOCGMIIPHY) { | |
766 | if (mdio->phy_id >= PHY_MAX_ADDR) | |
767 | return -ERANGE; | |
768 | ||
7f854420 | 769 | phy = mdiobus_get_phy(priv->mdio, mdio->phy_id); |
a1702857 TR |
770 | if (!phy) |
771 | return -ENODEV; | |
772 | } else { | |
773 | phy = priv->phy; | |
774 | } | |
775 | ||
28b04113 | 776 | return phy_mii_ioctl(phy, ifr, cmd); |
a1702857 TR |
777 | } |
778 | ||
efc61a34 | 779 | static void ethoc_do_set_mac_address(struct net_device *dev) |
a1702857 TR |
780 | { |
781 | struct ethoc *priv = netdev_priv(dev); | |
efc61a34 | 782 | unsigned char *mac = dev->dev_addr; |
939d2254 | 783 | |
a1702857 TR |
784 | ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) | |
785 | (mac[4] << 8) | (mac[5] << 0)); | |
786 | ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0)); | |
efc61a34 | 787 | } |
a1702857 | 788 | |
efc61a34 JP |
789 | static int ethoc_set_mac_address(struct net_device *dev, void *p) |
790 | { | |
791 | const struct sockaddr *addr = p; | |
939d2254 | 792 | |
efc61a34 JP |
793 | if (!is_valid_ether_addr(addr->sa_data)) |
794 | return -EADDRNOTAVAIL; | |
795 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
796 | ethoc_do_set_mac_address(dev); | |
a1702857 TR |
797 | return 0; |
798 | } | |
799 | ||
800 | static void ethoc_set_multicast_list(struct net_device *dev) | |
801 | { | |
802 | struct ethoc *priv = netdev_priv(dev); | |
803 | u32 mode = ethoc_read(priv, MODER); | |
22bedad3 | 804 | struct netdev_hw_addr *ha; |
a1702857 TR |
805 | u32 hash[2] = { 0, 0 }; |
806 | ||
807 | /* set loopback mode if requested */ | |
808 | if (dev->flags & IFF_LOOPBACK) | |
809 | mode |= MODER_LOOP; | |
810 | else | |
811 | mode &= ~MODER_LOOP; | |
812 | ||
813 | /* receive broadcast frames if requested */ | |
814 | if (dev->flags & IFF_BROADCAST) | |
815 | mode &= ~MODER_BRO; | |
816 | else | |
817 | mode |= MODER_BRO; | |
818 | ||
819 | /* enable promiscuous mode if requested */ | |
820 | if (dev->flags & IFF_PROMISC) | |
821 | mode |= MODER_PRO; | |
822 | else | |
823 | mode &= ~MODER_PRO; | |
824 | ||
825 | ethoc_write(priv, MODER, mode); | |
826 | ||
827 | /* receive multicast frames */ | |
828 | if (dev->flags & IFF_ALLMULTI) { | |
829 | hash[0] = 0xffffffff; | |
830 | hash[1] = 0xffffffff; | |
831 | } else { | |
22bedad3 JP |
832 | netdev_for_each_mc_addr(ha, dev) { |
833 | u32 crc = ether_crc(ETH_ALEN, ha->addr); | |
a1702857 TR |
834 | int bit = (crc >> 26) & 0x3f; |
835 | hash[bit >> 5] |= 1 << (bit & 0x1f); | |
836 | } | |
837 | } | |
838 | ||
839 | ethoc_write(priv, ETH_HASH0, hash[0]); | |
840 | ethoc_write(priv, ETH_HASH1, hash[1]); | |
841 | } | |
842 | ||
843 | static int ethoc_change_mtu(struct net_device *dev, int new_mtu) | |
844 | { | |
845 | return -ENOSYS; | |
846 | } | |
847 | ||
848 | static void ethoc_tx_timeout(struct net_device *dev) | |
849 | { | |
850 | struct ethoc *priv = netdev_priv(dev); | |
851 | u32 pending = ethoc_read(priv, INT_SOURCE); | |
852 | if (likely(pending)) | |
853 | ethoc_interrupt(dev->irq, dev); | |
854 | } | |
855 | ||
61357325 | 856 | static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev) |
a1702857 TR |
857 | { |
858 | struct ethoc *priv = netdev_priv(dev); | |
859 | struct ethoc_bd bd; | |
860 | unsigned int entry; | |
861 | void *dest; | |
862 | ||
863 | if (unlikely(skb->len > ETHOC_BUFSIZ)) { | |
57616ee4 | 864 | dev->stats.tx_errors++; |
3790c8cd | 865 | goto out; |
a1702857 TR |
866 | } |
867 | ||
868 | entry = priv->cur_tx % priv->num_tx; | |
869 | spin_lock_irq(&priv->lock); | |
870 | priv->cur_tx++; | |
871 | ||
872 | ethoc_read_bd(priv, entry, &bd); | |
873 | if (unlikely(skb->len < ETHOC_ZLEN)) | |
874 | bd.stat |= TX_BD_PAD; | |
875 | else | |
876 | bd.stat &= ~TX_BD_PAD; | |
877 | ||
f8555ad0 | 878 | dest = priv->vma[entry]; |
a1702857 TR |
879 | memcpy_toio(dest, skb->data, skb->len); |
880 | ||
881 | bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK); | |
882 | bd.stat |= TX_BD_LEN(skb->len); | |
883 | ethoc_write_bd(priv, entry, &bd); | |
884 | ||
885 | bd.stat |= TX_BD_READY; | |
886 | ethoc_write_bd(priv, entry, &bd); | |
887 | ||
888 | if (priv->cur_tx == (priv->dty_tx + priv->num_tx)) { | |
889 | dev_dbg(&dev->dev, "stopping queue\n"); | |
890 | netif_stop_queue(dev); | |
891 | } | |
892 | ||
a1702857 | 893 | spin_unlock_irq(&priv->lock); |
68f51394 | 894 | skb_tx_timestamp(skb); |
3790c8cd PM |
895 | out: |
896 | dev_kfree_skb(skb); | |
a1702857 TR |
897 | return NETDEV_TX_OK; |
898 | } | |
899 | ||
01cd7d57 MF |
900 | static int ethoc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
901 | { | |
902 | struct ethoc *priv = netdev_priv(dev); | |
903 | struct phy_device *phydev = priv->phy; | |
904 | ||
905 | if (!phydev) | |
906 | return -EOPNOTSUPP; | |
907 | ||
908 | return phy_ethtool_gset(phydev, cmd); | |
909 | } | |
910 | ||
911 | static int ethoc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
912 | { | |
913 | struct ethoc *priv = netdev_priv(dev); | |
914 | struct phy_device *phydev = priv->phy; | |
915 | ||
916 | if (!phydev) | |
917 | return -EOPNOTSUPP; | |
918 | ||
919 | return phy_ethtool_sset(phydev, cmd); | |
920 | } | |
921 | ||
1112909f MF |
922 | static int ethoc_get_regs_len(struct net_device *netdev) |
923 | { | |
924 | return ETH_END; | |
925 | } | |
926 | ||
927 | static void ethoc_get_regs(struct net_device *dev, struct ethtool_regs *regs, | |
928 | void *p) | |
929 | { | |
930 | struct ethoc *priv = netdev_priv(dev); | |
931 | u32 *regs_buff = p; | |
932 | unsigned i; | |
933 | ||
934 | regs->version = 0; | |
935 | for (i = 0; i < ETH_END / sizeof(u32); ++i) | |
936 | regs_buff[i] = ethoc_read(priv, i * sizeof(u32)); | |
937 | } | |
938 | ||
bee7bacd MF |
939 | static void ethoc_get_ringparam(struct net_device *dev, |
940 | struct ethtool_ringparam *ring) | |
941 | { | |
942 | struct ethoc *priv = netdev_priv(dev); | |
943 | ||
944 | ring->rx_max_pending = priv->num_bd - 1; | |
945 | ring->rx_mini_max_pending = 0; | |
946 | ring->rx_jumbo_max_pending = 0; | |
947 | ring->tx_max_pending = priv->num_bd - 1; | |
948 | ||
949 | ring->rx_pending = priv->num_rx; | |
950 | ring->rx_mini_pending = 0; | |
951 | ring->rx_jumbo_pending = 0; | |
952 | ring->tx_pending = priv->num_tx; | |
953 | } | |
954 | ||
955 | static int ethoc_set_ringparam(struct net_device *dev, | |
956 | struct ethtool_ringparam *ring) | |
957 | { | |
958 | struct ethoc *priv = netdev_priv(dev); | |
959 | ||
960 | if (ring->tx_pending < 1 || ring->rx_pending < 1 || | |
961 | ring->tx_pending + ring->rx_pending > priv->num_bd) | |
962 | return -EINVAL; | |
963 | if (ring->rx_mini_pending || ring->rx_jumbo_pending) | |
964 | return -EINVAL; | |
965 | ||
966 | if (netif_running(dev)) { | |
967 | netif_tx_disable(dev); | |
968 | ethoc_disable_rx_and_tx(priv); | |
969 | ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
970 | synchronize_irq(dev->irq); | |
971 | } | |
972 | ||
973 | priv->num_tx = rounddown_pow_of_two(ring->tx_pending); | |
974 | priv->num_rx = ring->rx_pending; | |
975 | ethoc_init_ring(priv, dev->mem_start); | |
976 | ||
977 | if (netif_running(dev)) { | |
978 | ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
979 | ethoc_enable_rx_and_tx(priv); | |
980 | netif_wake_queue(dev); | |
981 | } | |
982 | return 0; | |
983 | } | |
984 | ||
fba9110c | 985 | const struct ethtool_ops ethoc_ethtool_ops = { |
01cd7d57 MF |
986 | .get_settings = ethoc_get_settings, |
987 | .set_settings = ethoc_set_settings, | |
1112909f MF |
988 | .get_regs_len = ethoc_get_regs_len, |
989 | .get_regs = ethoc_get_regs, | |
fba9110c | 990 | .get_link = ethtool_op_get_link, |
bee7bacd MF |
991 | .get_ringparam = ethoc_get_ringparam, |
992 | .set_ringparam = ethoc_set_ringparam, | |
fba9110c MF |
993 | .get_ts_info = ethtool_op_get_ts_info, |
994 | }; | |
995 | ||
a1702857 TR |
996 | static const struct net_device_ops ethoc_netdev_ops = { |
997 | .ndo_open = ethoc_open, | |
998 | .ndo_stop = ethoc_stop, | |
999 | .ndo_do_ioctl = ethoc_ioctl, | |
a1702857 | 1000 | .ndo_set_mac_address = ethoc_set_mac_address, |
afc4b13d | 1001 | .ndo_set_rx_mode = ethoc_set_multicast_list, |
a1702857 TR |
1002 | .ndo_change_mtu = ethoc_change_mtu, |
1003 | .ndo_tx_timeout = ethoc_tx_timeout, | |
a1702857 TR |
1004 | .ndo_start_xmit = ethoc_start_xmit, |
1005 | }; | |
1006 | ||
1007 | /** | |
49ce9c2c | 1008 | * ethoc_probe - initialize OpenCores ethernet MAC |
a1702857 TR |
1009 | * pdev: platform device |
1010 | */ | |
a0a4efed | 1011 | static int ethoc_probe(struct platform_device *pdev) |
a1702857 TR |
1012 | { |
1013 | struct net_device *netdev = NULL; | |
1014 | struct resource *res = NULL; | |
1015 | struct resource *mmio = NULL; | |
1016 | struct resource *mem = NULL; | |
1017 | struct ethoc *priv = NULL; | |
c527f814 | 1018 | int num_bd; |
a1702857 | 1019 | int ret = 0; |
939d2254 | 1020 | bool random_mac = false; |
a13aff06 MF |
1021 | struct ethoc_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1022 | u32 eth_clkfreq = pdata ? pdata->eth_clkfreq : 0; | |
a1702857 TR |
1023 | |
1024 | /* allocate networking device */ | |
1025 | netdev = alloc_etherdev(sizeof(struct ethoc)); | |
1026 | if (!netdev) { | |
a1702857 TR |
1027 | ret = -ENOMEM; |
1028 | goto out; | |
1029 | } | |
1030 | ||
1031 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1032 | platform_set_drvdata(pdev, netdev); | |
1033 | ||
1034 | /* obtain I/O memory space */ | |
1035 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1036 | if (!res) { | |
1037 | dev_err(&pdev->dev, "cannot obtain I/O memory space\n"); | |
1038 | ret = -ENXIO; | |
1039 | goto free; | |
1040 | } | |
1041 | ||
1042 | mmio = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 1043 | resource_size(res), res->name); |
463889e2 | 1044 | if (!mmio) { |
a1702857 TR |
1045 | dev_err(&pdev->dev, "cannot request I/O memory space\n"); |
1046 | ret = -ENXIO; | |
1047 | goto free; | |
1048 | } | |
1049 | ||
1050 | netdev->base_addr = mmio->start; | |
1051 | ||
1052 | /* obtain buffer memory space */ | |
1053 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
0baa080c TC |
1054 | if (res) { |
1055 | mem = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 1056 | resource_size(res), res->name); |
0baa080c TC |
1057 | if (!mem) { |
1058 | dev_err(&pdev->dev, "cannot request memory space\n"); | |
1059 | ret = -ENXIO; | |
1060 | goto free; | |
1061 | } | |
1062 | ||
1063 | netdev->mem_start = mem->start; | |
1064 | netdev->mem_end = mem->end; | |
a1702857 TR |
1065 | } |
1066 | ||
a1702857 TR |
1067 | |
1068 | /* obtain device IRQ number */ | |
1069 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1070 | if (!res) { | |
1071 | dev_err(&pdev->dev, "cannot obtain IRQ\n"); | |
1072 | ret = -ENXIO; | |
1073 | goto free; | |
1074 | } | |
1075 | ||
1076 | netdev->irq = res->start; | |
1077 | ||
1078 | /* setup driver-private data */ | |
1079 | priv = netdev_priv(netdev); | |
1080 | priv->netdev = netdev; | |
0baa080c | 1081 | priv->dma_alloc = 0; |
28f65c11 | 1082 | priv->io_region_size = resource_size(mmio); |
a1702857 TR |
1083 | |
1084 | priv->iobase = devm_ioremap_nocache(&pdev->dev, netdev->base_addr, | |
d8645847 | 1085 | resource_size(mmio)); |
a1702857 TR |
1086 | if (!priv->iobase) { |
1087 | dev_err(&pdev->dev, "cannot remap I/O memory space\n"); | |
1088 | ret = -ENXIO; | |
1089 | goto error; | |
1090 | } | |
1091 | ||
0baa080c TC |
1092 | if (netdev->mem_end) { |
1093 | priv->membase = devm_ioremap_nocache(&pdev->dev, | |
d8645847 | 1094 | netdev->mem_start, resource_size(mem)); |
0baa080c TC |
1095 | if (!priv->membase) { |
1096 | dev_err(&pdev->dev, "cannot remap memory space\n"); | |
1097 | ret = -ENXIO; | |
1098 | goto error; | |
1099 | } | |
1100 | } else { | |
1101 | /* Allocate buffer memory */ | |
a71fba97 | 1102 | priv->membase = dmam_alloc_coherent(&pdev->dev, |
0baa080c TC |
1103 | buffer_size, (void *)&netdev->mem_start, |
1104 | GFP_KERNEL); | |
1105 | if (!priv->membase) { | |
1106 | dev_err(&pdev->dev, "cannot allocate %dB buffer\n", | |
1107 | buffer_size); | |
1108 | ret = -ENOMEM; | |
1109 | goto error; | |
1110 | } | |
1111 | netdev->mem_end = netdev->mem_start + buffer_size; | |
1112 | priv->dma_alloc = buffer_size; | |
a1702857 TR |
1113 | } |
1114 | ||
06e60e59 MF |
1115 | priv->big_endian = pdata ? pdata->big_endian : |
1116 | of_device_is_big_endian(pdev->dev.of_node); | |
1117 | ||
c527f814 JB |
1118 | /* calculate the number of TX/RX buffers, maximum 128 supported */ |
1119 | num_bd = min_t(unsigned int, | |
1120 | 128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ); | |
6a632625 JB |
1121 | if (num_bd < 4) { |
1122 | ret = -ENODEV; | |
1123 | goto error; | |
1124 | } | |
bee7bacd | 1125 | priv->num_bd = num_bd; |
6a632625 JB |
1126 | /* num_tx must be a power of two */ |
1127 | priv->num_tx = rounddown_pow_of_two(num_bd >> 1); | |
c527f814 JB |
1128 | priv->num_rx = num_bd - priv->num_tx; |
1129 | ||
6a632625 JB |
1130 | dev_dbg(&pdev->dev, "ethoc: num_tx: %d num_rx: %d\n", |
1131 | priv->num_tx, priv->num_rx); | |
1132 | ||
72aa8e1b | 1133 | priv->vma = devm_kzalloc(&pdev->dev, num_bd*sizeof(void *), GFP_KERNEL); |
f8555ad0 JB |
1134 | if (!priv->vma) { |
1135 | ret = -ENOMEM; | |
1136 | goto error; | |
1137 | } | |
1138 | ||
a1702857 | 1139 | /* Allow the platform setup code to pass in a MAC address. */ |
a13aff06 | 1140 | if (pdata) { |
a1702857 TR |
1141 | memcpy(netdev->dev_addr, pdata->hwaddr, IFHWADDRLEN); |
1142 | priv->phy_id = pdata->phy_id; | |
e0f4258b | 1143 | } else { |
72aa8e1b | 1144 | const uint8_t *mac; |
e0f4258b JB |
1145 | |
1146 | mac = of_get_property(pdev->dev.of_node, | |
1147 | "local-mac-address", | |
1148 | NULL); | |
1149 | if (mac) | |
1150 | memcpy(netdev->dev_addr, mac, IFHWADDRLEN); | |
444c5f92 | 1151 | priv->phy_id = -1; |
a1702857 TR |
1152 | } |
1153 | ||
1154 | /* Check that the given MAC address is valid. If it isn't, read the | |
72aa8e1b BG |
1155 | * current MAC from the controller. |
1156 | */ | |
a1702857 TR |
1157 | if (!is_valid_ether_addr(netdev->dev_addr)) |
1158 | ethoc_get_mac_address(netdev, netdev->dev_addr); | |
1159 | ||
1160 | /* Check the MAC again for validity, if it still isn't choose and | |
72aa8e1b BG |
1161 | * program a random one. |
1162 | */ | |
939d2254 | 1163 | if (!is_valid_ether_addr(netdev->dev_addr)) { |
7efd26d0 | 1164 | eth_random_addr(netdev->dev_addr); |
939d2254 DK |
1165 | random_mac = true; |
1166 | } | |
1167 | ||
efc61a34 | 1168 | ethoc_do_set_mac_address(netdev); |
a1702857 | 1169 | |
939d2254 | 1170 | if (random_mac) |
e41b2d7f | 1171 | netdev->addr_assign_type = NET_ADDR_RANDOM; |
a1702857 | 1172 | |
a13aff06 MF |
1173 | /* Allow the platform setup code to adjust MII management bus clock. */ |
1174 | if (!eth_clkfreq) { | |
1175 | struct clk *clk = devm_clk_get(&pdev->dev, NULL); | |
1176 | ||
1177 | if (!IS_ERR(clk)) { | |
1178 | priv->clk = clk; | |
1179 | clk_prepare_enable(clk); | |
1180 | eth_clkfreq = clk_get_rate(clk); | |
1181 | } | |
1182 | } | |
1183 | if (eth_clkfreq) { | |
1184 | u32 clkdiv = MIIMODER_CLKDIV(eth_clkfreq / 2500000 + 1); | |
1185 | ||
1186 | if (!clkdiv) | |
1187 | clkdiv = 2; | |
1188 | dev_dbg(&pdev->dev, "setting MII clkdiv to %u\n", clkdiv); | |
1189 | ethoc_write(priv, MIIMODER, | |
1190 | (ethoc_read(priv, MIIMODER) & MIIMODER_NOPRE) | | |
1191 | clkdiv); | |
1192 | } | |
1193 | ||
a1702857 TR |
1194 | /* register MII bus */ |
1195 | priv->mdio = mdiobus_alloc(); | |
1196 | if (!priv->mdio) { | |
1197 | ret = -ENOMEM; | |
1198 | goto free; | |
1199 | } | |
1200 | ||
1201 | priv->mdio->name = "ethoc-mdio"; | |
1202 | snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%d", | |
1203 | priv->mdio->name, pdev->id); | |
1204 | priv->mdio->read = ethoc_mdio_read; | |
1205 | priv->mdio->write = ethoc_mdio_write; | |
a1702857 TR |
1206 | priv->mdio->priv = priv; |
1207 | ||
a1702857 TR |
1208 | ret = mdiobus_register(priv->mdio); |
1209 | if (ret) { | |
1210 | dev_err(&netdev->dev, "failed to register MDIO bus\n"); | |
e7f4dc35 | 1211 | goto free; |
a1702857 TR |
1212 | } |
1213 | ||
1214 | ret = ethoc_mdio_probe(netdev); | |
1215 | if (ret) { | |
1216 | dev_err(&netdev->dev, "failed to probe MDIO bus\n"); | |
1217 | goto error; | |
1218 | } | |
1219 | ||
a1702857 TR |
1220 | /* setup the net_device structure */ |
1221 | netdev->netdev_ops = ðoc_netdev_ops; | |
1222 | netdev->watchdog_timeo = ETHOC_TIMEOUT; | |
1223 | netdev->features |= 0; | |
fba9110c | 1224 | netdev->ethtool_ops = ðoc_ethtool_ops; |
a1702857 TR |
1225 | |
1226 | /* setup NAPI */ | |
a1702857 TR |
1227 | netif_napi_add(netdev, &priv->napi, ethoc_poll, 64); |
1228 | ||
a1702857 TR |
1229 | spin_lock_init(&priv->lock); |
1230 | ||
1231 | ret = register_netdev(netdev); | |
1232 | if (ret < 0) { | |
1233 | dev_err(&netdev->dev, "failed to register interface\n"); | |
ee02a4ef | 1234 | goto error2; |
a1702857 TR |
1235 | } |
1236 | ||
1237 | goto out; | |
1238 | ||
ee02a4ef TC |
1239 | error2: |
1240 | netif_napi_del(&priv->napi); | |
a1702857 TR |
1241 | error: |
1242 | mdiobus_unregister(priv->mdio); | |
a1702857 TR |
1243 | mdiobus_free(priv->mdio); |
1244 | free: | |
a13aff06 MF |
1245 | if (priv->clk) |
1246 | clk_disable_unprepare(priv->clk); | |
a1702857 TR |
1247 | free_netdev(netdev); |
1248 | out: | |
1249 | return ret; | |
1250 | } | |
1251 | ||
1252 | /** | |
49ce9c2c | 1253 | * ethoc_remove - shutdown OpenCores ethernet MAC |
a1702857 TR |
1254 | * @pdev: platform device |
1255 | */ | |
a0a4efed | 1256 | static int ethoc_remove(struct platform_device *pdev) |
a1702857 TR |
1257 | { |
1258 | struct net_device *netdev = platform_get_drvdata(pdev); | |
1259 | struct ethoc *priv = netdev_priv(netdev); | |
1260 | ||
a1702857 | 1261 | if (netdev) { |
ee02a4ef | 1262 | netif_napi_del(&priv->napi); |
a1702857 TR |
1263 | phy_disconnect(priv->phy); |
1264 | priv->phy = NULL; | |
1265 | ||
1266 | if (priv->mdio) { | |
1267 | mdiobus_unregister(priv->mdio); | |
a1702857 TR |
1268 | mdiobus_free(priv->mdio); |
1269 | } | |
a13aff06 MF |
1270 | if (priv->clk) |
1271 | clk_disable_unprepare(priv->clk); | |
a1702857 TR |
1272 | unregister_netdev(netdev); |
1273 | free_netdev(netdev); | |
1274 | } | |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | #ifdef CONFIG_PM | |
1280 | static int ethoc_suspend(struct platform_device *pdev, pm_message_t state) | |
1281 | { | |
1282 | return -ENOSYS; | |
1283 | } | |
1284 | ||
1285 | static int ethoc_resume(struct platform_device *pdev) | |
1286 | { | |
1287 | return -ENOSYS; | |
1288 | } | |
1289 | #else | |
1290 | # define ethoc_suspend NULL | |
1291 | # define ethoc_resume NULL | |
1292 | #endif | |
1293 | ||
fa2b1837 | 1294 | static const struct of_device_id ethoc_match[] = { |
c9e358df | 1295 | { .compatible = "opencores,ethoc", }, |
e0f4258b JB |
1296 | {}, |
1297 | }; | |
1298 | MODULE_DEVICE_TABLE(of, ethoc_match); | |
e0f4258b | 1299 | |
a1702857 TR |
1300 | static struct platform_driver ethoc_driver = { |
1301 | .probe = ethoc_probe, | |
a0a4efed | 1302 | .remove = ethoc_remove, |
a1702857 TR |
1303 | .suspend = ethoc_suspend, |
1304 | .resume = ethoc_resume, | |
1305 | .driver = { | |
1306 | .name = "ethoc", | |
e0f4258b | 1307 | .of_match_table = ethoc_match, |
a1702857 TR |
1308 | }, |
1309 | }; | |
1310 | ||
db62f684 | 1311 | module_platform_driver(ethoc_driver); |
a1702857 TR |
1312 | |
1313 | MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); | |
1314 | MODULE_DESCRIPTION("OpenCores Ethernet MAC driver"); | |
1315 | MODULE_LICENSE("GPL v2"); | |
1316 |