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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> |
b34296a9 | 26 | #include <linux/of_net.h> |
9d9779e7 | 27 | #include <linux/module.h> |
a1702857 TR |
28 | #include <net/ethoc.h> |
29 | ||
0baa080c TC |
30 | static int buffer_size = 0x8000; /* 32 KBytes */ |
31 | module_param(buffer_size, int, 0); | |
32 | MODULE_PARM_DESC(buffer_size, "DMA buffer allocation size"); | |
33 | ||
a1702857 TR |
34 | /* register offsets */ |
35 | #define MODER 0x00 | |
36 | #define INT_SOURCE 0x04 | |
37 | #define INT_MASK 0x08 | |
38 | #define IPGT 0x0c | |
39 | #define IPGR1 0x10 | |
40 | #define IPGR2 0x14 | |
41 | #define PACKETLEN 0x18 | |
42 | #define COLLCONF 0x1c | |
43 | #define TX_BD_NUM 0x20 | |
44 | #define CTRLMODER 0x24 | |
45 | #define MIIMODER 0x28 | |
46 | #define MIICOMMAND 0x2c | |
47 | #define MIIADDRESS 0x30 | |
48 | #define MIITX_DATA 0x34 | |
49 | #define MIIRX_DATA 0x38 | |
50 | #define MIISTATUS 0x3c | |
51 | #define MAC_ADDR0 0x40 | |
52 | #define MAC_ADDR1 0x44 | |
53 | #define ETH_HASH0 0x48 | |
54 | #define ETH_HASH1 0x4c | |
55 | #define ETH_TXCTRL 0x50 | |
1112909f | 56 | #define ETH_END 0x54 |
a1702857 TR |
57 | |
58 | /* mode register */ | |
59 | #define MODER_RXEN (1 << 0) /* receive enable */ | |
60 | #define MODER_TXEN (1 << 1) /* transmit enable */ | |
61 | #define MODER_NOPRE (1 << 2) /* no preamble */ | |
62 | #define MODER_BRO (1 << 3) /* broadcast address */ | |
63 | #define MODER_IAM (1 << 4) /* individual address mode */ | |
64 | #define MODER_PRO (1 << 5) /* promiscuous mode */ | |
65 | #define MODER_IFG (1 << 6) /* interframe gap for incoming frames */ | |
66 | #define MODER_LOOP (1 << 7) /* loopback */ | |
67 | #define MODER_NBO (1 << 8) /* no back-off */ | |
68 | #define MODER_EDE (1 << 9) /* excess defer enable */ | |
69 | #define MODER_FULLD (1 << 10) /* full duplex */ | |
70 | #define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */ | |
71 | #define MODER_DCRC (1 << 12) /* delayed CRC enable */ | |
72 | #define MODER_CRC (1 << 13) /* CRC enable */ | |
73 | #define MODER_HUGE (1 << 14) /* huge packets enable */ | |
74 | #define MODER_PAD (1 << 15) /* padding enabled */ | |
75 | #define MODER_RSM (1 << 16) /* receive small packets */ | |
76 | ||
77 | /* interrupt source and mask registers */ | |
78 | #define INT_MASK_TXF (1 << 0) /* transmit frame */ | |
79 | #define INT_MASK_TXE (1 << 1) /* transmit error */ | |
80 | #define INT_MASK_RXF (1 << 2) /* receive frame */ | |
81 | #define INT_MASK_RXE (1 << 3) /* receive error */ | |
82 | #define INT_MASK_BUSY (1 << 4) | |
83 | #define INT_MASK_TXC (1 << 5) /* transmit control frame */ | |
84 | #define INT_MASK_RXC (1 << 6) /* receive control frame */ | |
85 | ||
86 | #define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE) | |
87 | #define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE) | |
88 | ||
89 | #define INT_MASK_ALL ( \ | |
90 | INT_MASK_TXF | INT_MASK_TXE | \ | |
91 | INT_MASK_RXF | INT_MASK_RXE | \ | |
92 | INT_MASK_TXC | INT_MASK_RXC | \ | |
93 | INT_MASK_BUSY \ | |
94 | ) | |
95 | ||
96 | /* packet length register */ | |
97 | #define PACKETLEN_MIN(min) (((min) & 0xffff) << 16) | |
98 | #define PACKETLEN_MAX(max) (((max) & 0xffff) << 0) | |
99 | #define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \ | |
100 | PACKETLEN_MAX(max)) | |
101 | ||
102 | /* transmit buffer number register */ | |
103 | #define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80) | |
104 | ||
105 | /* control module mode register */ | |
106 | #define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */ | |
107 | #define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */ | |
108 | #define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */ | |
109 | ||
110 | /* MII mode register */ | |
111 | #define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */ | |
112 | #define MIIMODER_NOPRE (1 << 8) /* no preamble */ | |
113 | ||
114 | /* MII command register */ | |
115 | #define MIICOMMAND_SCAN (1 << 0) /* scan status */ | |
116 | #define MIICOMMAND_READ (1 << 1) /* read status */ | |
117 | #define MIICOMMAND_WRITE (1 << 2) /* write control data */ | |
118 | ||
119 | /* MII address register */ | |
120 | #define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0) | |
121 | #define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8) | |
122 | #define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \ | |
123 | MIIADDRESS_RGAD(reg)) | |
124 | ||
125 | /* MII transmit data register */ | |
126 | #define MIITX_DATA_VAL(x) ((x) & 0xffff) | |
127 | ||
128 | /* MII receive data register */ | |
129 | #define MIIRX_DATA_VAL(x) ((x) & 0xffff) | |
130 | ||
131 | /* MII status register */ | |
132 | #define MIISTATUS_LINKFAIL (1 << 0) | |
133 | #define MIISTATUS_BUSY (1 << 1) | |
134 | #define MIISTATUS_INVALID (1 << 2) | |
135 | ||
136 | /* TX buffer descriptor */ | |
137 | #define TX_BD_CS (1 << 0) /* carrier sense lost */ | |
138 | #define TX_BD_DF (1 << 1) /* defer indication */ | |
139 | #define TX_BD_LC (1 << 2) /* late collision */ | |
140 | #define TX_BD_RL (1 << 3) /* retransmission limit */ | |
141 | #define TX_BD_RETRY_MASK (0x00f0) | |
142 | #define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4) | |
143 | #define TX_BD_UR (1 << 8) /* transmitter underrun */ | |
144 | #define TX_BD_CRC (1 << 11) /* TX CRC enable */ | |
145 | #define TX_BD_PAD (1 << 12) /* pad enable for short packets */ | |
146 | #define TX_BD_WRAP (1 << 13) | |
147 | #define TX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
148 | #define TX_BD_READY (1 << 15) /* TX buffer ready */ | |
149 | #define TX_BD_LEN(x) (((x) & 0xffff) << 16) | |
150 | #define TX_BD_LEN_MASK (0xffff << 16) | |
151 | ||
152 | #define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \ | |
153 | TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR) | |
154 | ||
155 | /* RX buffer descriptor */ | |
156 | #define RX_BD_LC (1 << 0) /* late collision */ | |
157 | #define RX_BD_CRC (1 << 1) /* RX CRC error */ | |
158 | #define RX_BD_SF (1 << 2) /* short frame */ | |
159 | #define RX_BD_TL (1 << 3) /* too long */ | |
160 | #define RX_BD_DN (1 << 4) /* dribble nibble */ | |
161 | #define RX_BD_IS (1 << 5) /* invalid symbol */ | |
162 | #define RX_BD_OR (1 << 6) /* receiver overrun */ | |
163 | #define RX_BD_MISS (1 << 7) | |
164 | #define RX_BD_CF (1 << 8) /* control frame */ | |
165 | #define RX_BD_WRAP (1 << 13) | |
166 | #define RX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
167 | #define RX_BD_EMPTY (1 << 15) | |
168 | #define RX_BD_LEN(x) (((x) & 0xffff) << 16) | |
169 | ||
170 | #define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \ | |
171 | RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS) | |
172 | ||
173 | #define ETHOC_BUFSIZ 1536 | |
174 | #define ETHOC_ZLEN 64 | |
175 | #define ETHOC_BD_BASE 0x400 | |
176 | #define ETHOC_TIMEOUT (HZ / 2) | |
177 | #define ETHOC_MII_TIMEOUT (1 + (HZ / 5)) | |
178 | ||
179 | /** | |
180 | * struct ethoc - driver-private device structure | |
181 | * @iobase: pointer to I/O memory region | |
182 | * @membase: pointer to buffer memory region | |
bee7bacd | 183 | * @num_bd: number of buffer descriptors |
a1702857 TR |
184 | * @num_tx: number of send buffers |
185 | * @cur_tx: last send buffer written | |
186 | * @dty_tx: last buffer actually sent | |
187 | * @num_rx: number of receive buffers | |
188 | * @cur_rx: current receive buffer | |
f8555ad0 | 189 | * @vma: pointer to array of virtual memory addresses for buffers |
a1702857 TR |
190 | * @netdev: pointer to network device structure |
191 | * @napi: NAPI structure | |
a1702857 | 192 | * @msg_enable: device state flags |
a1702857 | 193 | * @lock: device lock |
a1702857 TR |
194 | * @mdio: MDIO bus for PHY access |
195 | * @phy_id: address of attached PHY | |
196 | */ | |
197 | struct ethoc { | |
198 | void __iomem *iobase; | |
199 | void __iomem *membase; | |
06e60e59 | 200 | bool big_endian; |
a1702857 | 201 | |
bee7bacd | 202 | unsigned int num_bd; |
a1702857 TR |
203 | unsigned int num_tx; |
204 | unsigned int cur_tx; | |
205 | unsigned int dty_tx; | |
206 | ||
207 | unsigned int num_rx; | |
208 | unsigned int cur_rx; | |
209 | ||
72aa8e1b | 210 | void **vma; |
f8555ad0 | 211 | |
a1702857 TR |
212 | struct net_device *netdev; |
213 | struct napi_struct napi; | |
a1702857 TR |
214 | u32 msg_enable; |
215 | ||
a1702857 TR |
216 | spinlock_t lock; |
217 | ||
a1702857 | 218 | struct mii_bus *mdio; |
a13aff06 | 219 | struct clk *clk; |
a1702857 | 220 | s8 phy_id; |
abf7e53e FF |
221 | |
222 | int old_link; | |
223 | int old_duplex; | |
a1702857 TR |
224 | }; |
225 | ||
226 | /** | |
227 | * struct ethoc_bd - buffer descriptor | |
228 | * @stat: buffer statistics | |
229 | * @addr: physical memory address | |
230 | */ | |
231 | struct ethoc_bd { | |
232 | u32 stat; | |
233 | u32 addr; | |
234 | }; | |
235 | ||
16dd18b0 | 236 | static inline u32 ethoc_read(struct ethoc *dev, loff_t offset) |
a1702857 | 237 | { |
06e60e59 MF |
238 | if (dev->big_endian) |
239 | return ioread32be(dev->iobase + offset); | |
240 | else | |
241 | return ioread32(dev->iobase + offset); | |
a1702857 TR |
242 | } |
243 | ||
16dd18b0 | 244 | static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data) |
a1702857 | 245 | { |
06e60e59 MF |
246 | if (dev->big_endian) |
247 | iowrite32be(data, dev->iobase + offset); | |
248 | else | |
249 | iowrite32(data, dev->iobase + offset); | |
a1702857 TR |
250 | } |
251 | ||
16dd18b0 TC |
252 | static inline void ethoc_read_bd(struct ethoc *dev, int index, |
253 | struct ethoc_bd *bd) | |
a1702857 TR |
254 | { |
255 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
256 | bd->stat = ethoc_read(dev, offset + 0); | |
257 | bd->addr = ethoc_read(dev, offset + 4); | |
258 | } | |
259 | ||
16dd18b0 | 260 | static inline void ethoc_write_bd(struct ethoc *dev, int index, |
a1702857 TR |
261 | const struct ethoc_bd *bd) |
262 | { | |
263 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
264 | ethoc_write(dev, offset + 0, bd->stat); | |
265 | ethoc_write(dev, offset + 4, bd->addr); | |
266 | } | |
267 | ||
16dd18b0 | 268 | static inline void ethoc_enable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
269 | { |
270 | u32 imask = ethoc_read(dev, INT_MASK); | |
271 | imask |= mask; | |
272 | ethoc_write(dev, INT_MASK, imask); | |
273 | } | |
274 | ||
16dd18b0 | 275 | static inline void ethoc_disable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
276 | { |
277 | u32 imask = ethoc_read(dev, INT_MASK); | |
278 | imask &= ~mask; | |
279 | ethoc_write(dev, INT_MASK, imask); | |
280 | } | |
281 | ||
16dd18b0 | 282 | static inline void ethoc_ack_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
283 | { |
284 | ethoc_write(dev, INT_SOURCE, mask); | |
285 | } | |
286 | ||
16dd18b0 | 287 | static inline void ethoc_enable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
288 | { |
289 | u32 mode = ethoc_read(dev, MODER); | |
290 | mode |= MODER_RXEN | MODER_TXEN; | |
291 | ethoc_write(dev, MODER, mode); | |
292 | } | |
293 | ||
16dd18b0 | 294 | static inline void ethoc_disable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
295 | { |
296 | u32 mode = ethoc_read(dev, MODER); | |
297 | mode &= ~(MODER_RXEN | MODER_TXEN); | |
298 | ethoc_write(dev, MODER, mode); | |
299 | } | |
300 | ||
5cf3e034 | 301 | static int ethoc_init_ring(struct ethoc *dev, unsigned long mem_start) |
a1702857 TR |
302 | { |
303 | struct ethoc_bd bd; | |
304 | int i; | |
72aa8e1b | 305 | void *vma; |
a1702857 TR |
306 | |
307 | dev->cur_tx = 0; | |
308 | dev->dty_tx = 0; | |
309 | dev->cur_rx = 0; | |
310 | ||
ee4f56b9 JB |
311 | ethoc_write(dev, TX_BD_NUM, dev->num_tx); |
312 | ||
a1702857 | 313 | /* setup transmission buffers */ |
f8555ad0 | 314 | bd.addr = mem_start; |
a1702857 | 315 | bd.stat = TX_BD_IRQ | TX_BD_CRC; |
f8555ad0 | 316 | vma = dev->membase; |
a1702857 TR |
317 | |
318 | for (i = 0; i < dev->num_tx; i++) { | |
319 | if (i == dev->num_tx - 1) | |
320 | bd.stat |= TX_BD_WRAP; | |
321 | ||
322 | ethoc_write_bd(dev, i, &bd); | |
323 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
324 | |
325 | dev->vma[i] = vma; | |
326 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
327 | } |
328 | ||
a1702857 TR |
329 | bd.stat = RX_BD_EMPTY | RX_BD_IRQ; |
330 | ||
331 | for (i = 0; i < dev->num_rx; i++) { | |
332 | if (i == dev->num_rx - 1) | |
333 | bd.stat |= RX_BD_WRAP; | |
334 | ||
335 | ethoc_write_bd(dev, dev->num_tx + i, &bd); | |
336 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
337 | |
338 | dev->vma[dev->num_tx + i] = vma; | |
339 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
340 | } |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | static int ethoc_reset(struct ethoc *dev) | |
346 | { | |
347 | u32 mode; | |
348 | ||
349 | /* TODO: reset controller? */ | |
350 | ||
351 | ethoc_disable_rx_and_tx(dev); | |
352 | ||
353 | /* TODO: setup registers */ | |
354 | ||
355 | /* enable FCS generation and automatic padding */ | |
356 | mode = ethoc_read(dev, MODER); | |
357 | mode |= MODER_CRC | MODER_PAD; | |
358 | ethoc_write(dev, MODER, mode); | |
359 | ||
360 | /* set full-duplex mode */ | |
361 | mode = ethoc_read(dev, MODER); | |
362 | mode |= MODER_FULLD; | |
363 | ethoc_write(dev, MODER, mode); | |
364 | ethoc_write(dev, IPGT, 0x15); | |
365 | ||
366 | ethoc_ack_irq(dev, INT_MASK_ALL); | |
367 | ethoc_enable_irq(dev, INT_MASK_ALL); | |
368 | ethoc_enable_rx_and_tx(dev); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static unsigned int ethoc_update_rx_stats(struct ethoc *dev, | |
373 | struct ethoc_bd *bd) | |
374 | { | |
375 | struct net_device *netdev = dev->netdev; | |
376 | unsigned int ret = 0; | |
377 | ||
378 | if (bd->stat & RX_BD_TL) { | |
379 | dev_err(&netdev->dev, "RX: frame too long\n"); | |
57616ee4 | 380 | netdev->stats.rx_length_errors++; |
a1702857 TR |
381 | ret++; |
382 | } | |
383 | ||
384 | if (bd->stat & RX_BD_SF) { | |
385 | dev_err(&netdev->dev, "RX: frame too short\n"); | |
57616ee4 | 386 | netdev->stats.rx_length_errors++; |
a1702857 TR |
387 | ret++; |
388 | } | |
389 | ||
390 | if (bd->stat & RX_BD_DN) { | |
391 | dev_err(&netdev->dev, "RX: dribble nibble\n"); | |
57616ee4 | 392 | netdev->stats.rx_frame_errors++; |
a1702857 TR |
393 | } |
394 | ||
395 | if (bd->stat & RX_BD_CRC) { | |
396 | dev_err(&netdev->dev, "RX: wrong CRC\n"); | |
57616ee4 | 397 | netdev->stats.rx_crc_errors++; |
a1702857 TR |
398 | ret++; |
399 | } | |
400 | ||
401 | if (bd->stat & RX_BD_OR) { | |
402 | dev_err(&netdev->dev, "RX: overrun\n"); | |
57616ee4 | 403 | netdev->stats.rx_over_errors++; |
a1702857 TR |
404 | ret++; |
405 | } | |
406 | ||
407 | if (bd->stat & RX_BD_MISS) | |
57616ee4 | 408 | netdev->stats.rx_missed_errors++; |
a1702857 TR |
409 | |
410 | if (bd->stat & RX_BD_LC) { | |
411 | dev_err(&netdev->dev, "RX: late collision\n"); | |
57616ee4 | 412 | netdev->stats.collisions++; |
a1702857 TR |
413 | ret++; |
414 | } | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
419 | static int ethoc_rx(struct net_device *dev, int limit) | |
420 | { | |
421 | struct ethoc *priv = netdev_priv(dev); | |
422 | int count; | |
423 | ||
424 | for (count = 0; count < limit; ++count) { | |
425 | unsigned int entry; | |
426 | struct ethoc_bd bd; | |
427 | ||
6a632625 | 428 | entry = priv->num_tx + priv->cur_rx; |
a1702857 | 429 | ethoc_read_bd(priv, entry, &bd); |
20f70ddd JB |
430 | if (bd.stat & RX_BD_EMPTY) { |
431 | ethoc_ack_irq(priv, INT_MASK_RX); | |
432 | /* If packet (interrupt) came in between checking | |
433 | * BD_EMTPY and clearing the interrupt source, then we | |
434 | * risk missing the packet as the RX interrupt won't | |
435 | * trigger right away when we reenable it; hence, check | |
436 | * BD_EMTPY here again to make sure there isn't such a | |
437 | * packet waiting for us... | |
438 | */ | |
439 | ethoc_read_bd(priv, entry, &bd); | |
440 | if (bd.stat & RX_BD_EMPTY) | |
441 | break; | |
442 | } | |
a1702857 TR |
443 | |
444 | if (ethoc_update_rx_stats(priv, &bd) == 0) { | |
445 | int size = bd.stat >> 16; | |
89d71a66 | 446 | struct sk_buff *skb; |
050f91dc TC |
447 | |
448 | size -= 4; /* strip the CRC */ | |
89d71a66 | 449 | skb = netdev_alloc_skb_ip_align(dev, size); |
050f91dc | 450 | |
a1702857 | 451 | if (likely(skb)) { |
f8555ad0 | 452 | void *src = priv->vma[entry]; |
a1702857 TR |
453 | memcpy_fromio(skb_put(skb, size), src, size); |
454 | skb->protocol = eth_type_trans(skb, dev); | |
57616ee4 KV |
455 | dev->stats.rx_packets++; |
456 | dev->stats.rx_bytes += size; | |
a1702857 TR |
457 | netif_receive_skb(skb); |
458 | } else { | |
459 | if (net_ratelimit()) | |
72aa8e1b BG |
460 | dev_warn(&dev->dev, |
461 | "low on memory - packet dropped\n"); | |
a1702857 | 462 | |
57616ee4 | 463 | dev->stats.rx_dropped++; |
a1702857 TR |
464 | break; |
465 | } | |
466 | } | |
467 | ||
468 | /* clear the buffer descriptor so it can be reused */ | |
469 | bd.stat &= ~RX_BD_STATS; | |
470 | bd.stat |= RX_BD_EMPTY; | |
471 | ethoc_write_bd(priv, entry, &bd); | |
6a632625 JB |
472 | if (++priv->cur_rx == priv->num_rx) |
473 | priv->cur_rx = 0; | |
a1702857 TR |
474 | } |
475 | ||
476 | return count; | |
477 | } | |
478 | ||
4f64bcb2 | 479 | static void ethoc_update_tx_stats(struct ethoc *dev, struct ethoc_bd *bd) |
a1702857 TR |
480 | { |
481 | struct net_device *netdev = dev->netdev; | |
482 | ||
483 | if (bd->stat & TX_BD_LC) { | |
484 | dev_err(&netdev->dev, "TX: late collision\n"); | |
57616ee4 | 485 | netdev->stats.tx_window_errors++; |
a1702857 TR |
486 | } |
487 | ||
488 | if (bd->stat & TX_BD_RL) { | |
489 | dev_err(&netdev->dev, "TX: retransmit limit\n"); | |
57616ee4 | 490 | netdev->stats.tx_aborted_errors++; |
a1702857 TR |
491 | } |
492 | ||
493 | if (bd->stat & TX_BD_UR) { | |
494 | dev_err(&netdev->dev, "TX: underrun\n"); | |
57616ee4 | 495 | netdev->stats.tx_fifo_errors++; |
a1702857 TR |
496 | } |
497 | ||
498 | if (bd->stat & TX_BD_CS) { | |
499 | dev_err(&netdev->dev, "TX: carrier sense lost\n"); | |
57616ee4 | 500 | netdev->stats.tx_carrier_errors++; |
a1702857 TR |
501 | } |
502 | ||
503 | if (bd->stat & TX_BD_STATS) | |
57616ee4 | 504 | netdev->stats.tx_errors++; |
a1702857 | 505 | |
57616ee4 KV |
506 | netdev->stats.collisions += (bd->stat >> 4) & 0xf; |
507 | netdev->stats.tx_bytes += bd->stat >> 16; | |
508 | netdev->stats.tx_packets++; | |
a1702857 TR |
509 | } |
510 | ||
fa98eb0e | 511 | static int ethoc_tx(struct net_device *dev, int limit) |
a1702857 TR |
512 | { |
513 | struct ethoc *priv = netdev_priv(dev); | |
fa98eb0e JB |
514 | int count; |
515 | struct ethoc_bd bd; | |
a1702857 | 516 | |
fa98eb0e JB |
517 | for (count = 0; count < limit; ++count) { |
518 | unsigned int entry; | |
a1702857 | 519 | |
6a632625 | 520 | entry = priv->dty_tx & (priv->num_tx-1); |
a1702857 TR |
521 | |
522 | ethoc_read_bd(priv, entry, &bd); | |
a1702857 | 523 | |
fa98eb0e JB |
524 | if (bd.stat & TX_BD_READY || (priv->dty_tx == priv->cur_tx)) { |
525 | ethoc_ack_irq(priv, INT_MASK_TX); | |
526 | /* If interrupt came in between reading in the BD | |
527 | * and clearing the interrupt source, then we risk | |
528 | * missing the event as the TX interrupt won't trigger | |
529 | * right away when we reenable it; hence, check | |
530 | * BD_EMPTY here again to make sure there isn't such an | |
531 | * event pending... | |
532 | */ | |
533 | ethoc_read_bd(priv, entry, &bd); | |
534 | if (bd.stat & TX_BD_READY || | |
535 | (priv->dty_tx == priv->cur_tx)) | |
536 | break; | |
537 | } | |
538 | ||
4f64bcb2 | 539 | ethoc_update_tx_stats(priv, &bd); |
fa98eb0e | 540 | priv->dty_tx++; |
a1702857 TR |
541 | } |
542 | ||
543 | if ((priv->cur_tx - priv->dty_tx) <= (priv->num_tx / 2)) | |
544 | netif_wake_queue(dev); | |
545 | ||
fa98eb0e | 546 | return count; |
a1702857 TR |
547 | } |
548 | ||
549 | static irqreturn_t ethoc_interrupt(int irq, void *dev_id) | |
550 | { | |
57616ee4 | 551 | struct net_device *dev = dev_id; |
a1702857 TR |
552 | struct ethoc *priv = netdev_priv(dev); |
553 | u32 pending; | |
fa98eb0e JB |
554 | u32 mask; |
555 | ||
556 | /* Figure out what triggered the interrupt... | |
557 | * The tricky bit here is that the interrupt source bits get | |
25985edc | 558 | * set in INT_SOURCE for an event regardless of whether that |
fa98eb0e JB |
559 | * event is masked or not. Thus, in order to figure out what |
560 | * triggered the interrupt, we need to remove the sources | |
561 | * for all events that are currently masked. This behaviour | |
562 | * is not particularly well documented but reasonable... | |
563 | */ | |
564 | mask = ethoc_read(priv, INT_MASK); | |
a1702857 | 565 | pending = ethoc_read(priv, INT_SOURCE); |
fa98eb0e JB |
566 | pending &= mask; |
567 | ||
72aa8e1b | 568 | if (unlikely(pending == 0)) |
a1702857 | 569 | return IRQ_NONE; |
a1702857 | 570 | |
50c54a57 | 571 | ethoc_ack_irq(priv, pending); |
a1702857 | 572 | |
fa98eb0e | 573 | /* We always handle the dropped packet interrupt */ |
a1702857 | 574 | if (pending & INT_MASK_BUSY) { |
38b4bc20 | 575 | dev_dbg(&dev->dev, "packet dropped\n"); |
57616ee4 | 576 | dev->stats.rx_dropped++; |
a1702857 TR |
577 | } |
578 | ||
fa98eb0e JB |
579 | /* Handle receive/transmit event by switching to polling */ |
580 | if (pending & (INT_MASK_TX | INT_MASK_RX)) { | |
581 | ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
582 | napi_schedule(&priv->napi); | |
a1702857 TR |
583 | } |
584 | ||
a1702857 TR |
585 | return IRQ_HANDLED; |
586 | } | |
587 | ||
588 | static int ethoc_get_mac_address(struct net_device *dev, void *addr) | |
589 | { | |
590 | struct ethoc *priv = netdev_priv(dev); | |
591 | u8 *mac = (u8 *)addr; | |
592 | u32 reg; | |
593 | ||
594 | reg = ethoc_read(priv, MAC_ADDR0); | |
595 | mac[2] = (reg >> 24) & 0xff; | |
596 | mac[3] = (reg >> 16) & 0xff; | |
597 | mac[4] = (reg >> 8) & 0xff; | |
598 | mac[5] = (reg >> 0) & 0xff; | |
599 | ||
600 | reg = ethoc_read(priv, MAC_ADDR1); | |
601 | mac[0] = (reg >> 8) & 0xff; | |
602 | mac[1] = (reg >> 0) & 0xff; | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | static int ethoc_poll(struct napi_struct *napi, int budget) | |
608 | { | |
609 | struct ethoc *priv = container_of(napi, struct ethoc, napi); | |
fa98eb0e JB |
610 | int rx_work_done = 0; |
611 | int tx_work_done = 0; | |
612 | ||
613 | rx_work_done = ethoc_rx(priv->netdev, budget); | |
614 | tx_work_done = ethoc_tx(priv->netdev, budget); | |
a1702857 | 615 | |
fa98eb0e | 616 | if (rx_work_done < budget && tx_work_done < budget) { |
6ad20165 | 617 | napi_complete_done(napi, rx_work_done); |
fa98eb0e | 618 | ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX); |
a1702857 TR |
619 | } |
620 | ||
fa98eb0e | 621 | return rx_work_done; |
a1702857 TR |
622 | } |
623 | ||
624 | static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg) | |
625 | { | |
a1702857 | 626 | struct ethoc *priv = bus->priv; |
8dac428a | 627 | int i; |
a1702857 TR |
628 | |
629 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
630 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ); | |
631 | ||
72aa8e1b | 632 | for (i = 0; i < 5; i++) { |
a1702857 TR |
633 | u32 status = ethoc_read(priv, MIISTATUS); |
634 | if (!(status & MIISTATUS_BUSY)) { | |
635 | u32 data = ethoc_read(priv, MIIRX_DATA); | |
636 | /* reset MII command register */ | |
637 | ethoc_write(priv, MIICOMMAND, 0); | |
638 | return data; | |
639 | } | |
72aa8e1b | 640 | usleep_range(100, 200); |
a1702857 TR |
641 | } |
642 | ||
643 | return -EBUSY; | |
644 | } | |
645 | ||
646 | static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
647 | { | |
a1702857 | 648 | struct ethoc *priv = bus->priv; |
8dac428a | 649 | int i; |
a1702857 TR |
650 | |
651 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
652 | ethoc_write(priv, MIITX_DATA, val); | |
653 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE); | |
654 | ||
72aa8e1b | 655 | for (i = 0; i < 5; i++) { |
a1702857 | 656 | u32 stat = ethoc_read(priv, MIISTATUS); |
b46773db JB |
657 | if (!(stat & MIISTATUS_BUSY)) { |
658 | /* reset MII command register */ | |
659 | ethoc_write(priv, MIICOMMAND, 0); | |
a1702857 | 660 | return 0; |
b46773db | 661 | } |
72aa8e1b | 662 | usleep_range(100, 200); |
a1702857 TR |
663 | } |
664 | ||
665 | return -EBUSY; | |
666 | } | |
667 | ||
a1702857 TR |
668 | static void ethoc_mdio_poll(struct net_device *dev) |
669 | { | |
abf7e53e FF |
670 | struct ethoc *priv = netdev_priv(dev); |
671 | struct phy_device *phydev = dev->phydev; | |
672 | bool changed = false; | |
673 | u32 mode; | |
674 | ||
675 | if (priv->old_link != phydev->link) { | |
676 | changed = true; | |
677 | priv->old_link = phydev->link; | |
678 | } | |
679 | ||
680 | if (priv->old_duplex != phydev->duplex) { | |
681 | changed = true; | |
682 | priv->old_duplex = phydev->duplex; | |
683 | } | |
684 | ||
685 | if (!changed) | |
686 | return; | |
687 | ||
688 | mode = ethoc_read(priv, MODER); | |
689 | if (phydev->duplex == DUPLEX_FULL) | |
690 | mode |= MODER_FULLD; | |
691 | else | |
692 | mode &= ~MODER_FULLD; | |
693 | ethoc_write(priv, MODER, mode); | |
694 | ||
695 | phy_print_status(phydev); | |
a1702857 TR |
696 | } |
697 | ||
a0a4efed | 698 | static int ethoc_mdio_probe(struct net_device *dev) |
a1702857 TR |
699 | { |
700 | struct ethoc *priv = netdev_priv(dev); | |
701 | struct phy_device *phy; | |
637f33b8 | 702 | int err; |
a1702857 | 703 | |
72aa8e1b | 704 | if (priv->phy_id != -1) |
7f854420 | 705 | phy = mdiobus_get_phy(priv->mdio, priv->phy_id); |
72aa8e1b | 706 | else |
637f33b8 | 707 | phy = phy_find_first(priv->mdio); |
a1702857 TR |
708 | |
709 | if (!phy) { | |
710 | dev_err(&dev->dev, "no PHY found\n"); | |
711 | return -ENXIO; | |
712 | } | |
713 | ||
abf7e53e FF |
714 | priv->old_duplex = -1; |
715 | priv->old_link = -1; | |
716 | ||
f9a8f83b FF |
717 | err = phy_connect_direct(dev, phy, ethoc_mdio_poll, |
718 | PHY_INTERFACE_MODE_GMII); | |
637f33b8 | 719 | if (err) { |
a1702857 | 720 | dev_err(&dev->dev, "could not attach to PHY\n"); |
637f33b8 | 721 | return err; |
a1702857 TR |
722 | } |
723 | ||
58056c1e | 724 | phy_set_max_speed(phy, SPEED_100); |
445a48cc | 725 | |
a1702857 TR |
726 | return 0; |
727 | } | |
728 | ||
729 | static int ethoc_open(struct net_device *dev) | |
730 | { | |
731 | struct ethoc *priv = netdev_priv(dev); | |
a1702857 TR |
732 | int ret; |
733 | ||
734 | ret = request_irq(dev->irq, ethoc_interrupt, IRQF_SHARED, | |
735 | dev->name, dev); | |
736 | if (ret) | |
737 | return ret; | |
738 | ||
d220b942 MF |
739 | napi_enable(&priv->napi); |
740 | ||
5cf3e034 | 741 | ethoc_init_ring(priv, dev->mem_start); |
a1702857 TR |
742 | ethoc_reset(priv); |
743 | ||
744 | if (netif_queue_stopped(dev)) { | |
745 | dev_dbg(&dev->dev, " resuming queue\n"); | |
746 | netif_wake_queue(dev); | |
747 | } else { | |
748 | dev_dbg(&dev->dev, " starting queue\n"); | |
749 | netif_start_queue(dev); | |
750 | } | |
751 | ||
abf7e53e FF |
752 | priv->old_link = -1; |
753 | priv->old_duplex = -1; | |
754 | ||
11331fc2 | 755 | phy_start(dev->phydev); |
a1702857 TR |
756 | |
757 | if (netif_msg_ifup(priv)) { | |
758 | dev_info(&dev->dev, "I/O: %08lx Memory: %08lx-%08lx\n", | |
759 | dev->base_addr, dev->mem_start, dev->mem_end); | |
760 | } | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | static int ethoc_stop(struct net_device *dev) | |
766 | { | |
767 | struct ethoc *priv = netdev_priv(dev); | |
768 | ||
769 | napi_disable(&priv->napi); | |
770 | ||
11331fc2 PR |
771 | if (dev->phydev) |
772 | phy_stop(dev->phydev); | |
a1702857 TR |
773 | |
774 | ethoc_disable_rx_and_tx(priv); | |
775 | free_irq(dev->irq, dev); | |
776 | ||
777 | if (!netif_queue_stopped(dev)) | |
778 | netif_stop_queue(dev); | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static int ethoc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
784 | { | |
785 | struct ethoc *priv = netdev_priv(dev); | |
786 | struct mii_ioctl_data *mdio = if_mii(ifr); | |
787 | struct phy_device *phy = NULL; | |
788 | ||
789 | if (!netif_running(dev)) | |
790 | return -EINVAL; | |
791 | ||
792 | if (cmd != SIOCGMIIPHY) { | |
793 | if (mdio->phy_id >= PHY_MAX_ADDR) | |
794 | return -ERANGE; | |
795 | ||
7f854420 | 796 | phy = mdiobus_get_phy(priv->mdio, mdio->phy_id); |
a1702857 TR |
797 | if (!phy) |
798 | return -ENODEV; | |
799 | } else { | |
11331fc2 | 800 | phy = dev->phydev; |
a1702857 TR |
801 | } |
802 | ||
28b04113 | 803 | return phy_mii_ioctl(phy, ifr, cmd); |
a1702857 TR |
804 | } |
805 | ||
efc61a34 | 806 | static void ethoc_do_set_mac_address(struct net_device *dev) |
a1702857 TR |
807 | { |
808 | struct ethoc *priv = netdev_priv(dev); | |
efc61a34 | 809 | unsigned char *mac = dev->dev_addr; |
939d2254 | 810 | |
a1702857 TR |
811 | ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) | |
812 | (mac[4] << 8) | (mac[5] << 0)); | |
813 | ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0)); | |
efc61a34 | 814 | } |
a1702857 | 815 | |
efc61a34 JP |
816 | static int ethoc_set_mac_address(struct net_device *dev, void *p) |
817 | { | |
818 | const struct sockaddr *addr = p; | |
939d2254 | 819 | |
efc61a34 JP |
820 | if (!is_valid_ether_addr(addr->sa_data)) |
821 | return -EADDRNOTAVAIL; | |
822 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
823 | ethoc_do_set_mac_address(dev); | |
a1702857 TR |
824 | return 0; |
825 | } | |
826 | ||
827 | static void ethoc_set_multicast_list(struct net_device *dev) | |
828 | { | |
829 | struct ethoc *priv = netdev_priv(dev); | |
830 | u32 mode = ethoc_read(priv, MODER); | |
22bedad3 | 831 | struct netdev_hw_addr *ha; |
a1702857 TR |
832 | u32 hash[2] = { 0, 0 }; |
833 | ||
834 | /* set loopback mode if requested */ | |
835 | if (dev->flags & IFF_LOOPBACK) | |
836 | mode |= MODER_LOOP; | |
837 | else | |
838 | mode &= ~MODER_LOOP; | |
839 | ||
840 | /* receive broadcast frames if requested */ | |
841 | if (dev->flags & IFF_BROADCAST) | |
842 | mode &= ~MODER_BRO; | |
843 | else | |
844 | mode |= MODER_BRO; | |
845 | ||
846 | /* enable promiscuous mode if requested */ | |
847 | if (dev->flags & IFF_PROMISC) | |
848 | mode |= MODER_PRO; | |
849 | else | |
850 | mode &= ~MODER_PRO; | |
851 | ||
852 | ethoc_write(priv, MODER, mode); | |
853 | ||
854 | /* receive multicast frames */ | |
855 | if (dev->flags & IFF_ALLMULTI) { | |
856 | hash[0] = 0xffffffff; | |
857 | hash[1] = 0xffffffff; | |
858 | } else { | |
22bedad3 JP |
859 | netdev_for_each_mc_addr(ha, dev) { |
860 | u32 crc = ether_crc(ETH_ALEN, ha->addr); | |
a1702857 TR |
861 | int bit = (crc >> 26) & 0x3f; |
862 | hash[bit >> 5] |= 1 << (bit & 0x1f); | |
863 | } | |
864 | } | |
865 | ||
866 | ethoc_write(priv, ETH_HASH0, hash[0]); | |
867 | ethoc_write(priv, ETH_HASH1, hash[1]); | |
868 | } | |
869 | ||
870 | static int ethoc_change_mtu(struct net_device *dev, int new_mtu) | |
871 | { | |
872 | return -ENOSYS; | |
873 | } | |
874 | ||
875 | static void ethoc_tx_timeout(struct net_device *dev) | |
876 | { | |
877 | struct ethoc *priv = netdev_priv(dev); | |
878 | u32 pending = ethoc_read(priv, INT_SOURCE); | |
879 | if (likely(pending)) | |
880 | ethoc_interrupt(dev->irq, dev); | |
881 | } | |
882 | ||
61357325 | 883 | static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev) |
a1702857 TR |
884 | { |
885 | struct ethoc *priv = netdev_priv(dev); | |
886 | struct ethoc_bd bd; | |
887 | unsigned int entry; | |
888 | void *dest; | |
889 | ||
ee6c21b9 FF |
890 | if (skb_put_padto(skb, ETHOC_ZLEN)) { |
891 | dev->stats.tx_errors++; | |
892 | goto out_no_free; | |
893 | } | |
894 | ||
a1702857 | 895 | if (unlikely(skb->len > ETHOC_BUFSIZ)) { |
57616ee4 | 896 | dev->stats.tx_errors++; |
3790c8cd | 897 | goto out; |
a1702857 TR |
898 | } |
899 | ||
900 | entry = priv->cur_tx % priv->num_tx; | |
901 | spin_lock_irq(&priv->lock); | |
902 | priv->cur_tx++; | |
903 | ||
904 | ethoc_read_bd(priv, entry, &bd); | |
905 | if (unlikely(skb->len < ETHOC_ZLEN)) | |
906 | bd.stat |= TX_BD_PAD; | |
907 | else | |
908 | bd.stat &= ~TX_BD_PAD; | |
909 | ||
f8555ad0 | 910 | dest = priv->vma[entry]; |
a1702857 TR |
911 | memcpy_toio(dest, skb->data, skb->len); |
912 | ||
913 | bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK); | |
914 | bd.stat |= TX_BD_LEN(skb->len); | |
915 | ethoc_write_bd(priv, entry, &bd); | |
916 | ||
917 | bd.stat |= TX_BD_READY; | |
918 | ethoc_write_bd(priv, entry, &bd); | |
919 | ||
920 | if (priv->cur_tx == (priv->dty_tx + priv->num_tx)) { | |
921 | dev_dbg(&dev->dev, "stopping queue\n"); | |
922 | netif_stop_queue(dev); | |
923 | } | |
924 | ||
a1702857 | 925 | spin_unlock_irq(&priv->lock); |
68f51394 | 926 | skb_tx_timestamp(skb); |
3790c8cd PM |
927 | out: |
928 | dev_kfree_skb(skb); | |
ee6c21b9 | 929 | out_no_free: |
a1702857 TR |
930 | return NETDEV_TX_OK; |
931 | } | |
932 | ||
1112909f MF |
933 | static int ethoc_get_regs_len(struct net_device *netdev) |
934 | { | |
935 | return ETH_END; | |
936 | } | |
937 | ||
938 | static void ethoc_get_regs(struct net_device *dev, struct ethtool_regs *regs, | |
939 | void *p) | |
940 | { | |
941 | struct ethoc *priv = netdev_priv(dev); | |
942 | u32 *regs_buff = p; | |
943 | unsigned i; | |
944 | ||
945 | regs->version = 0; | |
946 | for (i = 0; i < ETH_END / sizeof(u32); ++i) | |
947 | regs_buff[i] = ethoc_read(priv, i * sizeof(u32)); | |
948 | } | |
949 | ||
bee7bacd MF |
950 | static void ethoc_get_ringparam(struct net_device *dev, |
951 | struct ethtool_ringparam *ring) | |
952 | { | |
953 | struct ethoc *priv = netdev_priv(dev); | |
954 | ||
955 | ring->rx_max_pending = priv->num_bd - 1; | |
956 | ring->rx_mini_max_pending = 0; | |
957 | ring->rx_jumbo_max_pending = 0; | |
958 | ring->tx_max_pending = priv->num_bd - 1; | |
959 | ||
960 | ring->rx_pending = priv->num_rx; | |
961 | ring->rx_mini_pending = 0; | |
962 | ring->rx_jumbo_pending = 0; | |
963 | ring->tx_pending = priv->num_tx; | |
964 | } | |
965 | ||
966 | static int ethoc_set_ringparam(struct net_device *dev, | |
967 | struct ethtool_ringparam *ring) | |
968 | { | |
969 | struct ethoc *priv = netdev_priv(dev); | |
970 | ||
971 | if (ring->tx_pending < 1 || ring->rx_pending < 1 || | |
972 | ring->tx_pending + ring->rx_pending > priv->num_bd) | |
973 | return -EINVAL; | |
974 | if (ring->rx_mini_pending || ring->rx_jumbo_pending) | |
975 | return -EINVAL; | |
976 | ||
977 | if (netif_running(dev)) { | |
978 | netif_tx_disable(dev); | |
979 | ethoc_disable_rx_and_tx(priv); | |
980 | ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
981 | synchronize_irq(dev->irq); | |
982 | } | |
983 | ||
984 | priv->num_tx = rounddown_pow_of_two(ring->tx_pending); | |
985 | priv->num_rx = ring->rx_pending; | |
986 | ethoc_init_ring(priv, dev->mem_start); | |
987 | ||
988 | if (netif_running(dev)) { | |
989 | ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX); | |
990 | ethoc_enable_rx_and_tx(priv); | |
991 | netif_wake_queue(dev); | |
992 | } | |
993 | return 0; | |
994 | } | |
995 | ||
a870a977 | 996 | static const struct ethtool_ops ethoc_ethtool_ops = { |
1112909f MF |
997 | .get_regs_len = ethoc_get_regs_len, |
998 | .get_regs = ethoc_get_regs, | |
3d3ba568 | 999 | .nway_reset = phy_ethtool_nway_reset, |
fba9110c | 1000 | .get_link = ethtool_op_get_link, |
bee7bacd MF |
1001 | .get_ringparam = ethoc_get_ringparam, |
1002 | .set_ringparam = ethoc_set_ringparam, | |
fba9110c | 1003 | .get_ts_info = ethtool_op_get_ts_info, |
87e544bf PR |
1004 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
1005 | .set_link_ksettings = phy_ethtool_set_link_ksettings, | |
fba9110c MF |
1006 | }; |
1007 | ||
a1702857 TR |
1008 | static const struct net_device_ops ethoc_netdev_ops = { |
1009 | .ndo_open = ethoc_open, | |
1010 | .ndo_stop = ethoc_stop, | |
1011 | .ndo_do_ioctl = ethoc_ioctl, | |
a1702857 | 1012 | .ndo_set_mac_address = ethoc_set_mac_address, |
afc4b13d | 1013 | .ndo_set_rx_mode = ethoc_set_multicast_list, |
a1702857 TR |
1014 | .ndo_change_mtu = ethoc_change_mtu, |
1015 | .ndo_tx_timeout = ethoc_tx_timeout, | |
a1702857 TR |
1016 | .ndo_start_xmit = ethoc_start_xmit, |
1017 | }; | |
1018 | ||
1019 | /** | |
49ce9c2c | 1020 | * ethoc_probe - initialize OpenCores ethernet MAC |
a1702857 TR |
1021 | * pdev: platform device |
1022 | */ | |
a0a4efed | 1023 | static int ethoc_probe(struct platform_device *pdev) |
a1702857 TR |
1024 | { |
1025 | struct net_device *netdev = NULL; | |
1026 | struct resource *res = NULL; | |
1027 | struct resource *mmio = NULL; | |
1028 | struct resource *mem = NULL; | |
1029 | struct ethoc *priv = NULL; | |
c527f814 | 1030 | int num_bd; |
a1702857 | 1031 | int ret = 0; |
a13aff06 MF |
1032 | struct ethoc_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1033 | u32 eth_clkfreq = pdata ? pdata->eth_clkfreq : 0; | |
a1702857 TR |
1034 | |
1035 | /* allocate networking device */ | |
1036 | netdev = alloc_etherdev(sizeof(struct ethoc)); | |
1037 | if (!netdev) { | |
a1702857 TR |
1038 | ret = -ENOMEM; |
1039 | goto out; | |
1040 | } | |
1041 | ||
1042 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1043 | platform_set_drvdata(pdev, netdev); | |
1044 | ||
1045 | /* obtain I/O memory space */ | |
1046 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1047 | if (!res) { | |
1048 | dev_err(&pdev->dev, "cannot obtain I/O memory space\n"); | |
1049 | ret = -ENXIO; | |
1050 | goto free; | |
1051 | } | |
1052 | ||
1053 | mmio = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 1054 | resource_size(res), res->name); |
463889e2 | 1055 | if (!mmio) { |
a1702857 TR |
1056 | dev_err(&pdev->dev, "cannot request I/O memory space\n"); |
1057 | ret = -ENXIO; | |
1058 | goto free; | |
1059 | } | |
1060 | ||
1061 | netdev->base_addr = mmio->start; | |
1062 | ||
1063 | /* obtain buffer memory space */ | |
1064 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
0baa080c TC |
1065 | if (res) { |
1066 | mem = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 1067 | resource_size(res), res->name); |
0baa080c TC |
1068 | if (!mem) { |
1069 | dev_err(&pdev->dev, "cannot request memory space\n"); | |
1070 | ret = -ENXIO; | |
1071 | goto free; | |
1072 | } | |
1073 | ||
1074 | netdev->mem_start = mem->start; | |
1075 | netdev->mem_end = mem->end; | |
a1702857 TR |
1076 | } |
1077 | ||
a1702857 TR |
1078 | |
1079 | /* obtain device IRQ number */ | |
1080 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1081 | if (!res) { | |
1082 | dev_err(&pdev->dev, "cannot obtain IRQ\n"); | |
1083 | ret = -ENXIO; | |
1084 | goto free; | |
1085 | } | |
1086 | ||
1087 | netdev->irq = res->start; | |
1088 | ||
1089 | /* setup driver-private data */ | |
1090 | priv = netdev_priv(netdev); | |
1091 | priv->netdev = netdev; | |
1092 | ||
1093 | priv->iobase = devm_ioremap_nocache(&pdev->dev, netdev->base_addr, | |
d8645847 | 1094 | resource_size(mmio)); |
a1702857 TR |
1095 | if (!priv->iobase) { |
1096 | dev_err(&pdev->dev, "cannot remap I/O memory space\n"); | |
1097 | ret = -ENXIO; | |
386512d1 | 1098 | goto free; |
a1702857 TR |
1099 | } |
1100 | ||
0baa080c TC |
1101 | if (netdev->mem_end) { |
1102 | priv->membase = devm_ioremap_nocache(&pdev->dev, | |
d8645847 | 1103 | netdev->mem_start, resource_size(mem)); |
0baa080c TC |
1104 | if (!priv->membase) { |
1105 | dev_err(&pdev->dev, "cannot remap memory space\n"); | |
1106 | ret = -ENXIO; | |
386512d1 | 1107 | goto free; |
0baa080c TC |
1108 | } |
1109 | } else { | |
1110 | /* Allocate buffer memory */ | |
a71fba97 | 1111 | priv->membase = dmam_alloc_coherent(&pdev->dev, |
0baa080c TC |
1112 | buffer_size, (void *)&netdev->mem_start, |
1113 | GFP_KERNEL); | |
1114 | if (!priv->membase) { | |
1115 | dev_err(&pdev->dev, "cannot allocate %dB buffer\n", | |
1116 | buffer_size); | |
1117 | ret = -ENOMEM; | |
386512d1 | 1118 | goto free; |
0baa080c TC |
1119 | } |
1120 | netdev->mem_end = netdev->mem_start + buffer_size; | |
a1702857 TR |
1121 | } |
1122 | ||
06e60e59 MF |
1123 | priv->big_endian = pdata ? pdata->big_endian : |
1124 | of_device_is_big_endian(pdev->dev.of_node); | |
1125 | ||
c527f814 JB |
1126 | /* calculate the number of TX/RX buffers, maximum 128 supported */ |
1127 | num_bd = min_t(unsigned int, | |
1128 | 128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ); | |
6a632625 JB |
1129 | if (num_bd < 4) { |
1130 | ret = -ENODEV; | |
386512d1 | 1131 | goto free; |
6a632625 | 1132 | } |
bee7bacd | 1133 | priv->num_bd = num_bd; |
6a632625 JB |
1134 | /* num_tx must be a power of two */ |
1135 | priv->num_tx = rounddown_pow_of_two(num_bd >> 1); | |
c527f814 JB |
1136 | priv->num_rx = num_bd - priv->num_tx; |
1137 | ||
6a632625 JB |
1138 | dev_dbg(&pdev->dev, "ethoc: num_tx: %d num_rx: %d\n", |
1139 | priv->num_tx, priv->num_rx); | |
1140 | ||
a86854d0 KC |
1141 | priv->vma = devm_kcalloc(&pdev->dev, num_bd, sizeof(void *), |
1142 | GFP_KERNEL); | |
f8555ad0 JB |
1143 | if (!priv->vma) { |
1144 | ret = -ENOMEM; | |
386512d1 | 1145 | goto free; |
f8555ad0 JB |
1146 | } |
1147 | ||
a1702857 | 1148 | /* Allow the platform setup code to pass in a MAC address. */ |
a13aff06 | 1149 | if (pdata) { |
de6b08fd | 1150 | ether_addr_copy(netdev->dev_addr, pdata->hwaddr); |
a1702857 | 1151 | priv->phy_id = pdata->phy_id; |
e0f4258b | 1152 | } else { |
b34296a9 | 1153 | const void *mac; |
e0f4258b | 1154 | |
b34296a9 | 1155 | mac = of_get_mac_address(pdev->dev.of_node); |
e0f4258b | 1156 | if (mac) |
de6b08fd | 1157 | ether_addr_copy(netdev->dev_addr, mac); |
444c5f92 | 1158 | priv->phy_id = -1; |
a1702857 TR |
1159 | } |
1160 | ||
1161 | /* Check that the given MAC address is valid. If it isn't, read the | |
72aa8e1b BG |
1162 | * current MAC from the controller. |
1163 | */ | |
a1702857 TR |
1164 | if (!is_valid_ether_addr(netdev->dev_addr)) |
1165 | ethoc_get_mac_address(netdev, netdev->dev_addr); | |
1166 | ||
1167 | /* Check the MAC again for validity, if it still isn't choose and | |
72aa8e1b BG |
1168 | * program a random one. |
1169 | */ | |
6d6a505a TK |
1170 | if (!is_valid_ether_addr(netdev->dev_addr)) |
1171 | eth_hw_addr_random(netdev); | |
939d2254 | 1172 | |
efc61a34 | 1173 | ethoc_do_set_mac_address(netdev); |
a1702857 | 1174 | |
a13aff06 MF |
1175 | /* Allow the platform setup code to adjust MII management bus clock. */ |
1176 | if (!eth_clkfreq) { | |
1177 | struct clk *clk = devm_clk_get(&pdev->dev, NULL); | |
1178 | ||
1179 | if (!IS_ERR(clk)) { | |
1180 | priv->clk = clk; | |
1181 | clk_prepare_enable(clk); | |
1182 | eth_clkfreq = clk_get_rate(clk); | |
1183 | } | |
1184 | } | |
1185 | if (eth_clkfreq) { | |
1186 | u32 clkdiv = MIIMODER_CLKDIV(eth_clkfreq / 2500000 + 1); | |
1187 | ||
1188 | if (!clkdiv) | |
1189 | clkdiv = 2; | |
1190 | dev_dbg(&pdev->dev, "setting MII clkdiv to %u\n", clkdiv); | |
1191 | ethoc_write(priv, MIIMODER, | |
1192 | (ethoc_read(priv, MIIMODER) & MIIMODER_NOPRE) | | |
1193 | clkdiv); | |
1194 | } | |
1195 | ||
a1702857 TR |
1196 | /* register MII bus */ |
1197 | priv->mdio = mdiobus_alloc(); | |
1198 | if (!priv->mdio) { | |
1199 | ret = -ENOMEM; | |
bfa49cfc | 1200 | goto free2; |
a1702857 TR |
1201 | } |
1202 | ||
1203 | priv->mdio->name = "ethoc-mdio"; | |
1204 | snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%d", | |
1205 | priv->mdio->name, pdev->id); | |
1206 | priv->mdio->read = ethoc_mdio_read; | |
1207 | priv->mdio->write = ethoc_mdio_write; | |
a1702857 TR |
1208 | priv->mdio->priv = priv; |
1209 | ||
a1702857 TR |
1210 | ret = mdiobus_register(priv->mdio); |
1211 | if (ret) { | |
1212 | dev_err(&netdev->dev, "failed to register MDIO bus\n"); | |
bfa49cfc | 1213 | goto free2; |
a1702857 TR |
1214 | } |
1215 | ||
1216 | ret = ethoc_mdio_probe(netdev); | |
1217 | if (ret) { | |
1218 | dev_err(&netdev->dev, "failed to probe MDIO bus\n"); | |
1219 | goto error; | |
1220 | } | |
1221 | ||
a1702857 TR |
1222 | /* setup the net_device structure */ |
1223 | netdev->netdev_ops = ðoc_netdev_ops; | |
1224 | netdev->watchdog_timeo = ETHOC_TIMEOUT; | |
1225 | netdev->features |= 0; | |
fba9110c | 1226 | netdev->ethtool_ops = ðoc_ethtool_ops; |
a1702857 TR |
1227 | |
1228 | /* setup NAPI */ | |
a1702857 TR |
1229 | netif_napi_add(netdev, &priv->napi, ethoc_poll, 64); |
1230 | ||
a1702857 TR |
1231 | spin_lock_init(&priv->lock); |
1232 | ||
1233 | ret = register_netdev(netdev); | |
1234 | if (ret < 0) { | |
1235 | dev_err(&netdev->dev, "failed to register interface\n"); | |
ee02a4ef | 1236 | goto error2; |
a1702857 TR |
1237 | } |
1238 | ||
1239 | goto out; | |
1240 | ||
ee02a4ef TC |
1241 | error2: |
1242 | netif_napi_del(&priv->napi); | |
a1702857 TR |
1243 | error: |
1244 | mdiobus_unregister(priv->mdio); | |
a1702857 | 1245 | mdiobus_free(priv->mdio); |
bfa49cfc | 1246 | free2: |
76e597eb | 1247 | clk_disable_unprepare(priv->clk); |
bfa49cfc | 1248 | free: |
a1702857 TR |
1249 | free_netdev(netdev); |
1250 | out: | |
1251 | return ret; | |
1252 | } | |
1253 | ||
1254 | /** | |
49ce9c2c | 1255 | * ethoc_remove - shutdown OpenCores ethernet MAC |
a1702857 TR |
1256 | * @pdev: platform device |
1257 | */ | |
a0a4efed | 1258 | static int ethoc_remove(struct platform_device *pdev) |
a1702857 TR |
1259 | { |
1260 | struct net_device *netdev = platform_get_drvdata(pdev); | |
1261 | struct ethoc *priv = netdev_priv(netdev); | |
1262 | ||
a1702857 | 1263 | if (netdev) { |
ee02a4ef | 1264 | netif_napi_del(&priv->napi); |
11331fc2 | 1265 | phy_disconnect(netdev->phydev); |
a1702857 TR |
1266 | |
1267 | if (priv->mdio) { | |
1268 | mdiobus_unregister(priv->mdio); | |
a1702857 TR |
1269 | mdiobus_free(priv->mdio); |
1270 | } | |
76e597eb | 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 |